CN113280263B

CN113280263B - Flow-adjustable metering type continuous conveying device

Info

Publication number: CN113280263B
Application number: CN202110170637.5A
Authority: CN
Inventors: 肖聪
Original assignee: Shenzhen Saili Automation Instrument Co ltd
Current assignee: Shenzhen Saili Automation Instrument Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-11-25
Anticipated expiration: 2041-02-08
Also published as: CN113280263A

Abstract

The utility model relates to a flow-adjustable metering type continuous conveying device and a flow-adjustable metering type continuous conveying method, wherein the conveying device comprises a medium input pipeline, a medium output pipeline, a flow stabilizing mechanism and a controller, the flow stabilizing mechanism comprises a first volume pipe conveying pump and a second volume pipe conveying pump which are arranged in parallel, each volume pipe conveying pump comprises a standard volume pipe and a flow regulating group which is arranged at the outer side of the standard volume pipe and comprises a first check valve, a second check valve, a third check valve and a fourth check valve, the standard volume pipe of the first volume pipe conveying pump and the standard volume pipe of the second volume pipe conveying pump are arranged side by side, and a medium output pipeline is positioned above the two standard volume pipes; the controller is connected with each driving mechanism and controls the piston motion of the first volume pipe delivery pump according to the acquired preset flow so as to enable the flow on the medium output pipeline to be constant and to be capable of continuously outputting. The continuous quantitative conveying medium can be realized, the manufacturing is easy, and the maintenance difficulty can be reduced.

Description

Metering type continuous conveying device with adjustable flow

Technical Field

The application relates to the technical field of medium conveying, in particular to a metering type continuous conveying device with adjustable flow.

Background

The volume tube is used as a quantitative conveying device and is often applied to the field of conveying various liquids, the existing standard volume tube can only output media in one direction, intermittent operation is needed, flow conveying is unstable, and all conveying devices are basically principle, for example, the invention patents CN1773224A, CN1651814A and CN1651762, because the theoretical conveying devices have too many pipelines and many valves, the manufacturing difficulty of the whole volume tube is large, and in practical application, the pipelines are connected with so many ports, so that the assembly problem is easy to occur, and the pipelines are arranged in a staggered manner, so that the later maintenance difficulty is increased.

Disclosure of Invention

Based on the above-mentioned current situation, the main objective of this application is to provide a metering type continuous conveying device of adjustable flow to solve the conveyor that lacks stable flow among the prior art.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the application provides a flow-adjustable metering type continuous conveying device, which comprises a medium input pipeline, a medium output pipeline, a controller and a flow stabilizing mechanism connected between the medium output pipeline and the medium input pipeline, wherein the flow stabilizing mechanism comprises a first volume pipe conveying pump and a second volume pipe conveying pump which are arranged in parallel,

each volume pipe delivery pump comprises a standard volume pipe and a rectification group arranged outside the standard volume pipe, the rectification group comprises a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve which are arranged in a bridge manner, the inlet end of the first one-way valve and the inlet end of the third one-way valve are respectively connected to the medium input pipeline, the outlet end of the first one-way valve is connected with the inlet end of the second one-way valve, and the outlet end of the third one-way valve is connected with the inlet end of the fourth one-way valve; the outlet end of the second one-way valve and the outlet end of the fourth one-way valve are respectively connected to the medium output pipeline; the standard volume tube comprises a tube body, a piston rod and a driving mechanism, wherein the piston is slidably mounted in the tube body, the piston rod is connected to two sides of the piston, the driving mechanism drives the piston rod to move, a first medium port and a second medium port are respectively arranged at two ends of the tube body, the first medium port is connected between the first one-way valve and the second one-way valve, the second medium port is connected between the third one-way valve and the fourth one-way valve, and the cross sections of volume cavities of the tube body at all positions along the sliding direction of the piston are consistent in area; the areas of the cross sections of the piston rods on the two sides of the piston are equal, the piston rods respectively extend out of the two ends of the tube body, one of the piston rods is connected with the driving mechanism, and the driving mechanism comprises a driving motor connected with the piston rod, so that when the piston moves, the amount of liquid discharged from the volume cavity is equal to the amount of liquid sucked in the volume cavity;

the standard volume pipe of the first volume pipe conveying pump and the standard volume pipe of the second volume pipe conveying pump are arranged side by side, and the pipe body of one of the two standard volume pipes is arranged side by side with the driving mechanism of the other one of the two standard volume pipes; the medium input pipeline is arranged side by side with the two standard volume pipes, and the medium output pipeline is positioned above the two standard volume pipes;

the controller is connected with each driving mechanism, determines a preset rotating speed according to the preset flow on the medium output pipeline, then controls the rotating speed of each driving motor according to the preset rotating speed, and enables the rotating number of the driving motors to meet an equation

The medium output pipeline is connected with a medium output pipeline, wherein theta a and theta b are the rotating number of turns of each driving motor respectively, T is the rotating time of each driving motor, and Vc is the preset rotating speed determined according to the preset flow on the medium output pipeline;

meanwhile, when the controller controls the driving motor of the first volume pipe conveying pump to move in an accelerating mode, the driving motor of the second volume pipe conveying pump to move in a decelerating mode, and when one of the piston of the first volume pipe conveying pump and the driving motor of the second volume pipe conveying pump moves at a constant speed, the other one of the piston of the first volume pipe conveying pump and the driving motor of the second volume pipe conveying pump is controlled to be static, so that the sum of the instantaneous flow rate of the first volume pipe conveying pump and the instantaneous flow rate of the second volume pipe conveying pump is constant, and further the flow on the medium output pipeline is constant and can be continuously output; when the driving mechanism pushes the piston to move from the second medium port to the first medium port, the first one-way valve and the fourth one-way valve are closed, the second one-way valve and the third one-way valve are communicated, when the piston moves from the first medium port to the second medium port, the first one-way valve and the fourth one-way valve are communicated, and the second one-way valve and the third one-way valve are closed, so that the medium flow directions of the volume tube delivery pump after being rectified by the rectifying group are consistent.

Preferably, the controller further comprises a display screen connected with the controller, and the controller further controls the display screen to display the movement speed of the driving motor and the flow rate of the medium output pipeline.

Preferably, the display screen is a touch display screen and is used for inputting preset flow; and the controller determines the speeds of the driving motors of the first volume pipe conveying pump and the second volume pipe conveying pump according to the preset flow, and controls the touch display screen to display the preset flow and the movement speed of the driving motor.

Preferably, the medium input pipeline comprises a connecting branch pipe, a first branch pipe and a second branch pipe which are oppositely arranged and connected with two ends of the connecting branch pipe in a bending manner; the flow stabilizing mechanism is arranged between the first branch pipe and the second branch pipe, and the first volume pipe conveying pump is closer to the first branch pipe than the second volume pipe conveying pump;

each rectification group further comprises a first connection valve pipe and a second connection valve pipe which are arranged side by side along the direction parallel to the axial direction of the standard volume pipe, a first extension valve pipe and a second extension valve pipe which are respectively connected with two ends of the first connection valve pipe in a bending way and are arranged in an extending way along the opposite direction, and a third extension valve pipe and a fourth extension valve pipe which are respectively connected with two ends of the second connection valve pipe in a bending way and are arranged in an extending way along the opposite direction; the first extension valve pipe, the second extension valve pipe, the third extension valve pipe and the fourth extension valve pipe are respectively provided with the first check valve, the second check valve, the third check valve and the fourth check valve; the standard volume pipe further comprises a first sub-pipe and a second sub-pipe, wherein the first sub-pipe and the first extension valve pipe are arranged in parallel in the opposite direction, the second sub-pipe and the third extension valve pipe are arranged in parallel in the opposite direction, two ends of the first sub-pipe are respectively connected with the first medium port and the first connection valve pipe, and two ends of the second sub-pipe are respectively connected with the second medium port and the second connection valve pipe; wherein, in the standard volume pipe of the first volume pipe delivery pump and the standard volume pipe of the second volume pipe delivery pump, the second extension valve pipe and the fourth extension valve pipe of the standard volume pipe delivery pump are arranged in a row in the direction parallel to the axial direction of the standard volume pipe and are respectively connected with the medium output pipeline; the first extension valve pipe and the third extension valve pipe of the first volume pipe delivery pump are connected to the first branch pipe, and the first extension valve pipe and the third extension valve pipe of the second volume pipe delivery pump are connected to the second branch pipe, wherein the relative direction refers to the relative direction of the first branch pipe and the second branch pipe.

Preferably, the device further comprises a connecting pipeline and a first switch valve arranged on the connecting pipeline, one end of the connecting pipeline is connected with the connecting branch pipe, and the other end of the connecting pipeline is connected with an output port of the medium output pipeline.

Preferably, the medium input pipeline further comprises a water storage tank, a second switch valve and an input branch pipe for connecting the water storage tank and the connecting branch pipe, and one end of the input branch pipe is connected to the connecting pipeline and is positioned on one side, close to the connecting branch pipe, of the second switch valve; the second switch valve is arranged on the input branch pipe.

Preferably, the medium output pipeline comprises a confluence branch pipe and a detection branch pipe which are arranged side by side in the height direction, the detection branch pipe is used for connecting an instrument to be detected, one end of the detection branch pipe is connected to the downstream of the confluence branch pipe, and the other end of the detection branch pipe is used as an output port of the medium output pipeline; and the second one-way valve and the fourth one-way valve are respectively connected to the confluence branch pipe.

Preferably, the device further comprises a mounting cabinet, wherein the mounting cabinet comprises a mounting rack and rollers, the mounting rack is provided with an operating platform, and the detection branch pipe is positioned above the operating platform; the medium input pipeline, the flow stabilizing mechanism and the controller are all arranged below the operating platform; the rollers are mounted at the bottom of the mounting frame.

Preferably, the device further comprises an external output pipeline, the external output pipeline is arranged above the operating platform, and one end of the external output pipeline is connected with an output port of the medium output pipeline.

Preferably, the driving mechanism further comprises a screw rod connected with the driving motor and a sliding block piston rod in threaded fit with the screw rod, and the piston rod sliding block is connected with the piston rod;

the standard volume tube further comprises a grating ruler, the grating ruler comprises a grating parallel to the screw rod and a reading head sliding along the grating, and the reading head is connected with the sliding block.

[ PROBLEMS ] the present invention

The utility model provides an adjustable flow's metering type continuous conveyor, including two sets of volume pipe delivery pumps that parallel arrangement, each volume pipe delivery pump includes standard volume pipe and the rectification group that is located the standard volume outside of tubes and includes four check valves, in use, according to the flow that the user needs, determine the velocity of flow of each volume pipe delivery pump, and then through controlling each piston motion, make the sum of the output flow of two volume pipe delivery pumps invariable, and when the control piston moves to first medium mouth from the second medium mouth, first check valve, fourth check valve stop, second check valve and third check valve switch on, and when moving to the second medium mouth from first medium mouth, make first check valve, fourth check valve switch on, second check valve and third check valve, this kind of device, though the medium flow direction of first medium mouth, the second medium mouth of each standard volume pipe delivery pump can change, but through the rectification of four check valves, make the medium flow direction of first volume pipe delivery pump and second volume pipe delivery pump at respective rectification exit is the same. Obviously, by adopting the conveying device, on one hand, only one standard volume pipe can be used in each volume pipe conveying pump, and the conveying device is simple in structure and convenient to arrange; the pipe bodies of the standard volume pipes of the two volume pipe conveying pumps are arranged in a staggered mode, so that the whole conveying device is more compact in layout and more reasonable in structure; on the other hand, four check valves in each volume pipe delivery pump are arranged on the outer side of the standard volume pipe, a user can easily observe the running state of the whole delivery device, especially the state of each check valve, when a fault occurs, the check valves can be found in time, meanwhile, the check valves are arranged outside the standard volume pipe, so that the replacement and maintenance are convenient, and when the check valves are maintained, the standard volume pipe cannot be influenced, and the probability of secondary faults caused during maintenance is reduced. On the other hand, the conveying device can also calibrate meters such as a flowmeter, does not work intermittently in the calibration process, and can continuously realize the calibration, so that the calibration accuracy is improved.

Other advantages of the present application will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.

Drawings

Preferred embodiments of the present application will be described below with reference to the accompanying drawings. In the figure:

FIG. 1 is a schematic structural view of a preferred embodiment of a metered continuous feed device as provided herein;

FIG. 2 is a partial structural view of a preferred embodiment of the metered continuous feed device provided herein;

FIG. 3 is a schematic diagram of a preferred embodiment of a metered continuous feed device as provided herein;

FIG. 4 is a schematic structural diagram of a preferred embodiment of a volumetric tube delivery pump in the metering continuous delivery apparatus provided in the present application;

FIG. 5 is a medium flow diagram of a preferred embodiment of a volumetric tube transfer pump in a metered continuous transfer device provided herein, with the piston moving toward the first medium port;

FIG. 6 is a medium flow diagram of a preferred embodiment of a volumetric tube delivery pump moving a piston towards a second medium port in the metered continuous delivery apparatus provided herein;

FIG. 7 is a timing diagram of the two volumetric delivery pumps before and after the instantaneous flow rate is rectified in a preferred embodiment of the metered continuous delivery apparatus provided herein;

FIG. 8 is a timing diagram of the media output line of the embodiment of FIG. 7;

FIG. 9 is a schematic representation of the velocity of the piston of a preferred embodiment of a volumetric tube delivery pump as a function of time in a metered continuous delivery apparatus provided herein;

fig. 10 is a schematic structural view of another preferred embodiment of a volumetric tube delivery pump in the metering continuous delivery apparatus provided in the present application.

In the figure:

10. a medium output line; 11. a branch manifold; 12. detecting a branch pipe;

20. a medium input line; 21. a first branch pipe; 22. a second branch pipe; 23. connecting branch pipes; 24. a water storage tank; 25. an input branch pipe; 26. a second on-off valve;

30. a flow stabilizing mechanism; 31. a first volumetric tube transfer pump; 311. a standard volume tube; 3111. a pipe body; 3111a, a first medium port; 3111b, a second medium port; 3112. a piston; 3113. a drive motor; 3114. a screw rod; 3115. a slider; 3116. a piston rod; 3117. a first sub-tube; 3118. a second sub-tube; 3119. a grating scale; 3119a, a grating; 3119b, a reading head; 310. rectifying the group; 312. a first check valve; 313. a second check valve; 314. a third check valve; 315. a fourth check valve; 316. a first connecting valve pipe; 3161. a first extension valve tube; 3162. a second extension valve tube; 317. a second connecting valve tube; 3171. a third extension valve tube; 3172. a fourth extension valve tube; 32. a second volumetric tube transfer pump;

40. a controller;

50. connecting a pipeline;

60. a first on-off valve;

70. installing a cabinet; 71. a mounting frame; 711. an operation table; 72. and a roller.

Detailed Description

The present application is described below based on examples, but the present application is not limited to only these examples. In the following detailed description of the present application, certain specific details are set forth in order to avoid obscuring the nature of the present application, well-known methods, procedures, flows, and components are not set forth in detail.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

The application provides a flow-adjustable metering type continuous conveying device, which can be applied to the technical field of liquid conveying such as aviation and petroleum, and can also be applied to the technical field of gas conveying; the metering type continuous conveying device can also be used for calibrating flow detection instruments such as a flowmeter. Specifically, as shown in fig. 1 to fig. 6, the flow-rate-adjustable metering continuous conveying device includes a medium input pipeline 20, a medium output pipeline 10, and a flow stabilizing mechanism 30 connecting the medium output pipeline 10 and the medium input pipeline 20, where the flow stabilizing mechanism 30 includes a plurality of volume pipe conveying pumps (e.g., a first volume pipe conveying pump 31 and a second volume pipe conveying pump 32) arranged side by side, and the plurality of volume pipe conveying pumps are arranged in parallel, that is, the flow stabilizing mechanism 30 may be provided with two, three, or more groups of volume pipe conveying pumps, a rectification inlet of each volume pipe conveying pump is connected to the medium input pipeline 20, and a rectification outlet of each volume pipe conveying pump is connected to the medium output pipeline 10, so as to form a parallel pipeline, as shown in fig. 1 to fig. 3, an embodiment of two groups of volume pipe conveying pumps is provided, and the two groups of volume pipe conveying pumps are respectively the first volume pipe conveying pump 31 and the second volume pipe conveying pump 32, and are arranged in parallel between the medium input pipeline 20 and the medium output pipeline 10.

With continued reference to fig. 2-4, each volume tube delivery pump includes a standard volume tube 311 and a rectification group 310 disposed outside the standard volume tube 311, the rectification group 310 includes a first check valve 312, a second check valve 313, a third check valve 314 and a fourth check valve 315 arranged in a bridge manner, each check valve can be conducted only when the medium flows along one direction, each check valve is along the flow direction of the medium when conducting, the upstream end is an inlet end, the downstream end is an outlet end, the inlet end of the first check valve 312 and the inlet end of the third check valve 314 are respectively connected to the medium input pipeline 20, the outlet end of the first check valve 312 is connected to the inlet end of the second check valve 313, and the outlet end of the third check valve 314 is connected to the inlet end of the fourth check valve 315; the outlet end of the second check valve 313 and the outlet end of the fourth check valve 315 are connected to the medium output line 10, respectively. Specifically, the inlet end of the first check valve 312 and the inlet end of the third check valve 314 may be connected first to form a rectification inlet of the rectification group 310, which is also an input port of the volumetric tube transfer pump, and then connected to the medium input pipeline 20, and the outlet end of the second check valve 313 is connected to the outlet end of the fourth check valve 315 to form a rectification outlet of the rectification group 310, which is also an output port of the volumetric tube transfer pump, and then connected to the medium output pipeline 10; of course, the inlet end of the first check valve 312 and the inlet end of the third check valve 314 may be connected to the medium input line 20, and the outlet end of the second check valve 313 and the outlet end of the fourth check valve 315 may be connected to the medium output line 10, respectively, as shown in fig. 2.

Referring to fig. 3 and 4, the standard volume tube 311 includes a tube body 3111, a piston 3112 slidably installed in the tube body 3111, a driving rod 3116 connected to both sides of the piston 3112, and a driving mechanism for driving the piston 3116 to move, wherein the piston 3112 divides a space in the tube body 3111 into two cavities, a first cavity and a second cavity; a first medium port 3111a and a second medium port 3111b are disposed at two ends of the pipe body 3111, that is, the first medium port 3111a and the second medium port 3111b are respectively located at two sides of the piston 3112, the first medium port 3111a is disposed in the first cavity, the first medium port 3111a is connected between the first check valve 312 and the second check valve 313, the second medium port 3111b is disposed in the second cavity, and the second medium port 311b is connected between the third check valve 314 and the fourth check valve 315. That is, the cross-sectional areas of the volume cavity of the pipe body 3111 are uniform everywhere along the sliding direction of the piston 3112, that is, the cross-sectional areas of the first cavity and the second cavity are equal; the cross-sectional areas of the piston rod 3116 on both sides of the piston 3112 are also equal and extend out of both ends of the tube 3111, so that when the piston 3112 slides, the decreased volume of the first chamber (i.e., the amount of liquid flowing out of the first medium port 3111 a) and the increased volume of the second chamber (i.e., the amount of liquid sucked into the second medium port 3111 b) are equal, or the increased volume of the first chamber and the decreased volume of the second chamber are equal. To increase the stability of the sliding of the piston 3112, one of the piston rods 3116 is connected to a drive mechanism. The drive mechanism includes a drive motor connected to the piston rod 3116 such that when the piston 3112 is moved, the volume of liquid discharged from the volume chamber is equal to the volume of liquid drawn in.

The flow-adjustable metering type continuous conveying device also comprises a controller 40, wherein the controller 40 is connected with each driving mechanism, determines a preset rotating speed Vc (sum of the rotating speeds of all the driving motors) according to the preset flow on the medium output pipeline 10, and then controls all the driving motors according to the preset rotating speed Vc to enable the number of rotating turns of all the driving motors to meet the equation

Where θ a and θ b are the number of rotation turns of each driving motor, T is the time of rotation of each driving motor, i.e. the first term on the right side of the mode is the rotation speed of the driving motor of the first volumetric tubular delivery pump 31, and the second term is the rotation speed of the driving motor of the second volumetric tubular delivery pump 32.

Meanwhile, the controller 40 controls the piston 3112 (specifically, the driving motor) of the first volume tube conveying pump 31 to perform accelerated motion, the piston 3112 (specifically, the driving motor) of the second volume tube conveying pump 32 to perform decelerated motion, and controls one of the piston 3112 (specifically, the driving motor) of the first volume tube conveying pump 31 and the piston 3112 (specifically, the driving motor) of the second volume tube conveying pump 32 to perform uniform motion, and the other is stationary, so that the sum of the instantaneous flow rate (which refers to the flow rate at the rectified outlet) of the first volume tube conveying pump 31 and the instantaneous flow rate (which refers to the flow rate at the rectified outlet) of the second volume tube conveying pump 32 is constant, and further the flow rate on the medium output pipeline 10 is constant and can be continuously output; when the driving mechanism pushes the piston 3112 to move from the second medium port 3111b to the first medium port 3111a, the first check valve 312 and the fourth check valve 315 are closed, the second check valve 313 and the third check valve 314 are opened, and when the piston 3112 moves from the first medium port 3111a to the second medium port 3111b, the first check valve 312 and the fourth check valve 315 are opened, the second check valve 313 and the third check valve 314 are closed, so that the flow directions of the rectified media of the volume tube delivery pump through the rectification group 310 are consistent, namely, the rectified media enter the volume tube delivery pump from the rectification inlet of the rectification group 310, and the rectified media enter the volume tube delivery pump through the rectification outlet of the rectification group 310 and then enter the medium output pipeline 10. Note that, when the piston 3112 of the first volumetric tube transfer pump 31 is accelerated at the initial start-up of the volumetric tube transfer pump, the piston 3112 of the second volumetric tube transfer pump 32 is not actually operated, and when the piston 3112 of the first volumetric tube transfer pump 31 is accelerated during the cycle after the start-up, the piston 3112 of the second volumetric tube transfer pump 32 is decelerated. In addition, although only two sets of the volumetric tube pumps 31 are illustrated, when a plurality of sets of volumetric tube pumps are provided, the motion of the pistons of each volumetric tube pump is compensated, for example, a part of the pistons perform acceleration motion, a part of the pistons perform deceleration motion, or a part of the pistons perform uniform motion, a part of the pistons are stationary, or a part of the pistons perform acceleration motion, a part of the pistons perform deceleration motion, or a part of the pistons are stationary.

In the above embodiment, when the piston 3112 moves towards the first medium port 3111a, the second check valve 313 and the third check valve 314 are turned on, the first check valve 312 and the fourth check valve 315 are turned off, as shown in fig. 5, the external medium enters the second cavity through the second medium port 3111b, and the medium in the first cavity is extruded by the piston 3112 and discharged through the first medium port 3111 a; when the piston 3112 moves toward the second medium port 3111b, the second check valve 313 and the third check valve 314 are closed, the first check valve 312 and the fourth check valve 315 are opened, as shown in fig. 6, the external medium enters the first chamber through the first medium port 3111a, and the medium in the second chamber is pressed by the piston 3112 and discharged through the second medium port 3111 b. Obviously, in the volume tube transfer pump, although the flow directions of the first medium port 3111a and the second medium port 3111b are different according to the movement direction of the piston, the flow directions at the flow rectification outlet ports are consistent through the flow rectification of the four check valves, that is, the first medium port 3111a and the second medium port 3111b can be used as a medium inlet or a medium outlet entering the tube body, so that the design of the transfer pipeline or the detection pipeline can be facilitated; and four check valves in each volume pipe delivery pump set up in the outside of standard volume pipe, and the user is easy to observe to the running state of whole device, especially is easy to observe to the state of each check valve, when breaking down, can in time discover, simultaneously, because the check valve sets up in the outside of standard volume pipe 311, be convenient for change and maintenance, when its maintenance, standard volume pipe 311 also can not receive the influence to reduce the probability that causes secondary failure during the maintenance. On the other hand, the flow-adjustable metering type continuous conveying device comprises a plurality of groups of volume pipe conveying pumps which are arranged in parallel, the flow speed of each volume pipe conveying pump can be determined according to the preset flow required by a user, and then the sum of the output flows of the volume pipe conveying pumps is constant by controlling the movement of the piston 3112. Obviously, with the conveying device, only one standard volume pipe can be used in each volume pipe conveying pump, and the conveying device is simple in structure and convenient to arrange. On the other hand, the conveying device can also calibrate meters such as the flowmeter, does not need to work intermittently in the calibration process, can work continuously, and realizes continuous calibration, so that the calibration accuracy is improved; when the medium output pipeline calibration device is used for detecting devices such as a flowmeter, the flowmeter can be directly arranged on the medium output pipeline 10, the metering value of the flowmeter is calibrated by setting different preset flows, and the accuracy of calibration of the flowmeter is further improved due to the fact that the different preset flows can be set. In addition, in two adjacent volumetric tube pumps, the tube 3111 of one volumetric tube pump is opposed to the drive mechanism of the other volumetric tube pump, and when two volumetric tube pumps are provided, the first volumetric tube pump 31 and the second volumetric tube pump 32 are arranged side by side in the above-mentioned opposing direction, and the tube 3111 of the first volumetric tube pump is opposed to the drive mechanism of the second volumetric tube pump in the opposing direction Y, and the tube 3111 of the second volumetric tube pump is opposed to the drive mechanism of the first volumetric tube pump in the opposing direction Y, that is, the standard volumetric tubes 311 of the two volumetric tube pumps are arranged in a staggered manner, and since the tube 3111 has a large diameter, the drive mechanism is relatively long and thin, and the size in the cross-sectional direction of the tube 3111 is small, the arrangement in this manner can make the entire transfer apparatus more compact and more reasonable in layout.

Further, with continued reference to fig. 2-4, each rectification group 310 further includes a first connection valve pipe 316 and a second connection valve pipe 317 arranged side by side along a direction parallel to the axial direction of the standard volume pipe 311, a first extension valve pipe 3161 and a second extension valve pipe 3162 respectively connected to two ends of the first connection valve pipe in a bent manner and extending in opposite directions, and a third extension valve pipe 3171 and a fourth extension valve pipe 3172 respectively connected to two ends of the second connection valve pipe 317 in a bent manner and extending in opposite directions; a first check valve 312, a second check valve 313, a third check valve 314 and a fourth check valve 315 are respectively arranged on the first extension valve pipe 3161, the second extension valve pipe 3162, the third extension valve pipe 3171 and the fourth extension valve pipe 3172, that is, the first check valve 312, the second check valve 313, the third check valve 314 and the fourth check valve 315 are all arranged outside the standard volume pipe 311, only when the medium flows along one direction, each check valve can be conducted, each check valve can conduct along the flow direction of the medium when conducting, the upstream end is an inlet end, the downstream end is an outlet end, the inlet end of the first check valve 312 and the inlet end of the third check valve 314 are respectively connected to the medium input pipeline 20, the outlet end of the first check valve 312 and the inlet end of the second check valve 313 are connected through a first connection valve pipe 316, and the outlet end of the third check valve 314 and the inlet end of the fourth check valve 315 are connected through a second connection valve pipe 317; the outlet ends of the second check valve 313 and the fourth check valve 315 are connected to the medium outlet line 10, respectively.

Referring to fig. 3 and 4, the standard volume pipe 311 further includes a first sub-pipe 3117 and a second sub-pipe 3118, both ends of the first sub-pipe 3117 are connected to the first medium port 3111a and the first connection valve pipe 316, respectively, and both ends of the second sub-pipe 3118 are connected to the second medium port 3111b and the second connection valve pipe 317, respectively. The first sub-pipe 3117 and the first extension valve pipe 3161 are arranged side by side, the second sub-pipe and the third extension valve pipe 3161 are arranged side by side, and the direction of the first sub-pipe 3117 and the third extension valve pipe may be the relative direction Y of the first branch pipe 21 and the second branch pipe 22, which will be described later, that is, the direction of the plurality of volume pipe delivery pumps.

In the embodiment where two volumetric tube transfer pumps are provided, the second extension valve tube 3162 and the fourth extension valve tube 3172 of the two volumetric tube transfer pumps are arranged in a row in a direction parallel to the axial direction X of the standard volumetric tube 311 to form a discharge tube, and are connected to the medium output pipeline 10, respectively; the first extension valve pipe 3161 and the third extension valve pipe 3171 of the first volume pipe transfer pump 31 are located on one side of the row of pipes in the opposite direction Y, the first extension valve pipe 3161 and the third extension valve pipe 3171 of the second volume pipe transfer pump 32 are located on the other side of the row of pipes in the opposite direction Y, and actually the other pipes of the first volume pipe transfer pump 31 and the second volume pipe transfer pump 32 are located on both sides of the row of pipes, i.e., the first sub-pipe 3117, the second sub-pipe 3118, the first extension valve pipe 3161, and the third extension valve pipe 3171 of the first volume pipe transfer pump 31 are located on one side of the row of pipes in the opposite direction Y, and the first sub-pipe 3117, the second sub-pipe 3118, the first extension valve pipe 3161, and the third extension valve pipe 3171 of the second volume pipe transfer pump 32 are located on the other side of the row of pipes in the opposite direction Y.

Further, the medium input pipeline 20 and the volume pipe delivery pump are arranged side by side, preferably, arranged around the flow stabilizing mechanism, the medium output pipeline 10 is arranged above the flow stabilizing mechanism, that is, the volume pipe delivery pump and the medium input pipeline 20 are arranged below, and the medium output pipeline 10 is arranged above, so that the medium output pipeline 10 can be used for detecting meters such as a flow meter and the like, and can be used for being connected with other structures as a total output port, and therefore, the arrangement mode can be better and conveniently used for operation.

When the volume tube transfer pumps are provided with two sets, the medium input pipeline 20 comprises a connecting branch tube 23, a first branch tube 21 and a second branch tube 22 which are oppositely arranged and are connected with two ends of the connecting branch tube 23 in a bending mode, namely, the first branch tube 21 and the second branch tube 22 extend from two ends of the connecting branch tube 23 in the same direction, in this embodiment, the flow stabilizing mechanism is arranged between the first branch tube 21 and the second branch tube 22, the first volume tube transfer pump 31 is closer to the first branch tube 21 than the second volume tube transfer pump 32, namely, the first branch tube 21, the first volume tube transfer pump 31, the second volume tube transfer pump 32 and the second branch tube 22 are arranged side by side in the opposite direction Y, the first extension valve tube 3161 and the third extension valve tube 3171 of the first volume tube transfer pump 31 are directly connected with the first branch tube 21, and the first extension valve tube 3161 and the third extension valve tube 3171 of the second volume tube transfer pump 32 are directly connected with the second branch tube 22.

The flow-adjustable metering type continuous conveying device comprises a plurality of groups of volume pipe conveying pumps arranged side by side, a medium input pipeline 20 is arranged around a steady flow mechanism, a medium output pipeline 10 is arranged above the steady flow mechanism, in two adjacent volume pipe conveying pumps, a pipe body 3111 of one is arranged side by side with a driving mechanism of the other, each volume pipe conveying pump comprises a standard volume pipe 311 and four one-way valves positioned outside the standard volume pipe 311, second extension valve pipes 3162 and fourth extension valve pipes 3172 of the standard volume pipe are arranged in a row in a direction parallel to the axial direction of the standard volume pipe, first extension valve pipes 3161 and third extension valve pipes 3171 of the standard volume pipe are respectively positioned on two sides of the row, and by adopting the structure, on one hand, all pipelines connected with the first volume pipe conveying pump are positioned on the side or positioned on the side far away from the second volume pipe conveying pump, all pipelines adjacent to the second volume pipe conveying pump are positioned on the side or positioned on the side far away from the first volume pipe conveying pump, so that the pipelines of the whole conveying device can not cross each other, and the pipelines can be assembled on the real side of the first volume pipe conveying pump, and can not be easily subjected to maintenance engineering, and can be easily carried out mistakes when being carried out; and the medium output pipeline 10 is arranged above, so that the observation and operation are convenient when the conveying device is used, and particularly when the meters such as a flowmeter are tested, the meters are directly arranged on the medium output pipeline 10 and used for better observing and recording the data of the meters, thereby improving the accuracy of the test or calibration. On the other hand, four check valves in each volume pipe delivery pump are arranged on the outer side of the standard volume pipe 311, a user can easily observe the running state of the whole delivery device, particularly the state of each check valve, when a fault occurs, the check valves can be found in time, meanwhile, the check valves are arranged outside the standard volume pipe, replacement and maintenance are facilitated, when the check valves are maintained, the standard volume pipe 311 cannot be influenced, and therefore the probability of secondary faults caused during maintenance is reduced. On the other hand, the conveying device can also calibrate meters such as a flowmeter, does not intermittently work in the calibration process, and can continuously realize the calibration, so that the calibration accuracy is improved.

In this embodiment, the external medium may be input through any one or several of the first branch pipe 21, the second branch pipe 22, or the connecting branch pipe 23. When volume pipe delivery pump was provided with the multiunit, can include more branch pipes, each branch pipe sets up respectively in one side of the volume pipe delivery pump who corresponds, and these branch pipes then all connect in connecting branch pipe.

As shown in fig. 1 to 3, the metering type continuous feeding device further includes a connecting line 50 and a first on-off valve 60 provided in the connecting line 50, and the connecting branch 23 is connected to the output port of the medium output line 10 through the connecting line 50. It is understood that the input end of the medium input pipeline 20 and the output end of the medium output pipeline 10 are provided with a switch valve, which is referred to as a third switch valve, and the switch valve may be a ball valve, or other switch valves. By adding the connecting pipeline 50, when the first switch valve 60 is opened and the two third switch valves are closed, a circulation loop is formed from the medium input pipeline 20 to the connecting pipeline 50 through the flow stabilizing mechanism 30 and the medium output pipeline 10, at this time, other external container devices and the like are not needed, meters such as a flowmeter and the like can be detected through the circulation loop, and the detection of the self running condition can also be used when the whole metering type continuous conveying device is manufactured, such as the detection of the sealing performance of each one-way valve or interface and the like.

Wherein, medium input pipeline 20 can the direct connection external medium source, in one embodiment, medium input pipeline 20 still includes water storage box 24, second ooff valve 26 and connects water storage box 24 and the input branch pipe 25 of connecting branch pipe 23, second ooff valve 26 sets up in input branch pipe 25, through setting up water storage box 24, can set up the receiving container at the output of medium output pipeline 10, open second ooff valve 27, close first ooff valve 60 simultaneously, carry out the drainage weighing test to conveyor, with the leakproofness and the stability of each check valve when different stages of work, and detect static discharge capacity.

It should be noted that the medium input pipeline 20 may be disposed above the flow stabilizing mechanism 30, or disposed at other positions, and when disposed at other positions, the medium input pipeline 20 may still adopt the above structure, and the connecting pipeline 50 may still be disposed.

With continued reference to fig. 1-3, the medium output pipeline 10 includes a confluence branch pipe 11 and a detection branch pipe 12 for connecting a meter to be detected, one end of the detection branch pipe 12 is connected to the downstream of the confluence branch pipe 11, and the other end is used as an output port of the medium output pipeline 10, in this embodiment, each of the local hot extension valve pipes 3162 and the fourth extension valve pipe 3172 is respectively connected to the confluence branch pipe 11, and after such arrangement, the meter to be detected, such as a flow meter, is arranged on the detection branch pipe 12, and due to the confluence effect of the confluence branch pipe 11, the flow rate on the detection branch pipe 12 is more stable, and therefore, the detection precision of the meter can be further improved. In the embodiment in which the connecting line 50 is provided, the connecting line 50 is connected directly to the test branch 12. It is understood that the medium outlet line 10 may also comprise only the detection branch 12.

For ease of handling and transport, the metering continuous conveyor further comprises a mounting cabinet 70, as shown in fig. 1, the mounting cabinet 70 comprising a mounting frame 71, the mounting frame 71 having an operating platform 711, in the embodiment in which the collecting branch 11 is provided, the detecting branch 12 being located above the operating platform 711; the medium inlet line 20 and the flow stabilizer 30 are disposed below the console 711, and the controller 40 (described in detail below) may be disposed below the console 711. When the medium outlet line 10 includes only the detection branch line 12, the entire medium outlet line 10 may be directly disposed above the operation table 711.

Further, the mounting cabinet 70 further includes rollers 72, and the rollers 72 are mounted at the bottom of the mounting frame 71 to further facilitate the transportation of the entire conveyor.

In order to further facilitate the test and use, the metering type continuous conveying device further comprises an external output pipeline, one end of the external output pipeline is connected with the output port of the medium output pipeline 10, the other end of the external output pipeline is used for outputting a medium, and the external output pipeline can be a bent pipe so as to be convenient for a user to contain the flowing medium.

The driving mechanism further includes a screw 3114 connected to the driving motor 3113 and a slider 3115 in threaded fit with the screw 3114, the piston 3116 is connected to the slider 3115, specifically, the driving motor 3113 is located on one side of the tube body 311 along the sliding direction of the piston 3112, and the piston 3116 near one side of the driving motor 3113 is connected to the driving slider 3115, so that the driving motor 3113 rotates to drive the screw 3114 to rotate, so that the slider 3115 slides along the axial direction of the screw 3114, and further drives the piston 3116 to move telescopically relative to the tube body 3111, so that the piston 3112 moves to be close to the first medium port 3111a or the second medium port 3111b, so as to transport the medium in one of the first cavity or the second cavity out, and the medium is sucked into the other cavity. For the convenience of installation, actuating mechanism can also include the mounting panel, and driving motor 3113 and lead screw 3114 can be installed in the mounting panel, and lead screw 3114 rotates for the mounting panel around self axis, and further, can also set up the guide rail along the axial extension of lead screw 3114 on the mounting panel again, slider 3115 still with the guide rail cooperation to increase the gliding stability of slider 3115.

When both ends of the piston rod 3116 extend out of the tube 3111, the piston 3112 slides in a guiding manner by the cooperation of the piston rod 3116 and the tube 3111, so that the movement of the piston 3112 is more stable.

In this embodiment, the controller 40 is connected to the drive mechanism through each drive motor 3113 to control the output flow rate of each volumetric tube delivery pump.

In a preferred embodiment, the body 3111, the piston 3112, the piston rod 3116 and the driving mechanism (including the driving motor, the lead screw, the slider and the like) of each standard volume tube 311 are the same, so as to control the whole conveying device, specifically, the preset rotation speed Vc can be calculated according to the following formula:

preset flow = preset rotational speed x the pitch of the lead screw x the area of the cross section of the pipe body.

Standard volume pipe 311 still includes grating scale 3119, grating scale 3119 includes grating 3119a and the gliding reading head 3119b of following grating 3119a that is on a parallel with lead screw 3114 setting, grating 3119a can install on mounting bracket 71, reading head 3119b is connected with slider 3115, when metering type continuous conveyor is used for detecting meters such as flowmeter, the displacement of piston 3112 can be surveyed through grating scale 3119, and then calculate the flow on medium output pipeline 10, adopt grating scale 3119 can improve the detection precision to the meter greatly. Further, the reading head 3119b can be directly connected to the controller 40, especially in the embodiment where the controller 40 includes a display screen (described in detail below), the reading head 3119b sends a signal to the controller 40, the controller 40 obtains the flow rate on the medium output pipeline 10 through processing, and then controls the display screen to display the flow rate, so that the user can obtain the detection result more intuitively. Of course, the reading head 3119b may also be connected to other processing modules, such as an upper computer, so as to output the result through the upper computer, which may be the distance moved by the piston, or the flow rate on the medium output pipeline 10.

In another embodiment, the moving distance of the piston can also be directly calculated according to the rotating speed of the driving motor.

The application also provides a quantitative conveying method of the metering type continuous conveying device, which can be used for the conveying device, and in the embodiment of the metering type continuous conveying device provided with the two groups of volume pipe conveying pumps, the quantitative conveying method comprises the following steps:

s1: acquiring a preset flow, the cross section area of the inner cavities of the standard volume pipes of the first volume pipe delivery pump and the second volume pipe delivery pump, the screw pitch of the screw rod and the stroke of the piston, wherein the stroke of the piston refers to the sliding distance of the piston in the pipe body;

s2: determining the speed of the uniform motion and the acceleration during acceleration and deceleration of each driving motor according to preset flow, cross-sectional area, screw pitch and stroke of a screw rod, wherein the accelerations of pistons 3112 of a first volume pipe delivery pump 31 and a second volume pipe delivery pump 32 are equal, and the acceleration value during acceleration and the acceleration value during deceleration of the first volume pipe delivery pump and the second volume pipe delivery pump are equal, specifically, determining a preset rotating speed according to the formula of the preset flow, and then determining the speed of the uniform motion and the acceleration during acceleration and deceleration of each driving motor according to the preset rotating speed and stroke;

s3: and driving the driving motor to operate according to the corresponding rotating speed at each moment.

That is, when the metering type continuous feed apparatus of the present application is operated, a preset flow rate, i.e., a flow rate of an output from the desired medium output line 10 is obtained, the rotational speeds (i.e., the speeds described above) of the driving motors 3113 of the first and second volumetric pipe feed pumps 31 and 32 at respective times are determined according to the preset flow rate, and then the driving motors 3113 are driven to operate according to the correspondence relationship between the times and the rotational speeds, so that the sum of the output flow rate of the first volumetric pipe feed pump 31 and the output flow rate of the second volumetric pipe feed pump 32 at the respective times is the preset flow rate, that is, when the output flow rate of the first volumetric pipe feed pump 31 is decreased, the output flow rate of the second volumetric pipe feed pump 31 needs to be increased, and vice versa.

Specifically, the constant motion of the piston 3112 can be controlled by the rotation speed of the driving motor, and for a volumetric tube delivery pump, the instantaneous rotation speed of the driving motor is equal to the quotient of the instantaneous flow rate of the volumetric tube delivery pump, the area of the cross section of the tube body, and the pitch of the screw rod, and the sum of the instantaneous flow rates of the volumetric tube delivery pumps is a constant value, so that the flow rate on the medium output pipeline 10 is constant.

Here, the standard volume pipe 311 of the first volume pipe transfer pump 31 and the standard volume pipe 311 of the second volume pipe transfer pump 32 may have the same structure, cross section, or the like, that is, may be the same type of volume pipe, and at each time, the sum of the sliding speed of the piston 3112 of the first volume pipe transfer pump 31 (referred to as a first speed) and the sliding speed of the piston 3112 of the second volume pipe transfer pump 32 (referred to as a second speed) is constant, and the sum is the speed when one of the pistons 3112 moves at a constant speed. The standard volume pipe 311 of the first volume pipe delivery pump 31 and the standard volume pipe 311 of the second volume pipe delivery pump 32 can also be of different types, and at the moment, the sum of the output flows of the first volume pipe delivery pump 31 and the second volume pipe delivery pump 32 is constant only by controlling the rotating speed of the respective driving motors.

Taking the same structure of the two volumetric tube delivery pumps 31 as an example to describe the operation process of the delivery device, the piston 3112 of the first volumetric tube delivery pump 31 initially makes an accelerated motion to move to the first medium port 3111a, at this time, the first check valve 312 and the fourth check valve 315 are turned off, the second check valve 313 and the third check valve 314 are turned on, as shown in fig. 5, until the piston is accelerated to a speed corresponding to a preset flow rate (denoted as a target speed), and operates for a period of time, during this process, the second volumetric tube delivery pump 31 is not operated, and the medium flow rate on the medium output pipeline 10 is the medium flow rate output by the first volumetric tube delivery pump 31. When the piston 3112 of the first volumetric tube transfer pump 31 moves fast to the end of the tube body 3111 away from the second medium port 3111b, it starts to perform deceleration movement, and at this time, the piston 3112 of the second volumetric tube transfer pump 32 performs acceleration movement at the same time, and it can also move toward the first medium port 3111a, so that the sum of the movement speed of the piston 3112 of the first volumetric tube transfer pump 31 and the movement speed of the piston 3112 of the second volumetric tube transfer pump 32 is equal to the target speed, and the acceleration values thereof are equal, so that the sum of the medium flow rate output by the first volumetric tube transfer pump 31 and the medium flow rate output by the second volumetric tube transfer pump 32 is equal to the preset flow rate. When the piston 3112 of the first volume tube transfer pump 31 decelerates to zero, it moves right to the end of the tube body 3111 away from the second medium port 3111b, and at the same time, the piston 3112 of the second volume tube transfer pump 32 accelerates to the target speed, and then the piston of the first volume tube transfer pump 31 is stationary and the piston 3112 of the second volume tube transfer pump 32 moves at the target speed at a constant speed for a while. When the piston 3112 of the second volume tube transfer pump 32 moves to the end of the tube body 3111 away from the second medium port 3111b, deceleration movement is started, and at this time, the piston 3112 of the first volume tube transfer pump 31 simultaneously performs acceleration movement to the second medium port 3111b, and in this process, the first check valve 312 and the fourth check valve 315 are opened, and the second check valve 313 and the third check valve 314 are closed, as shown in fig. 6, and at the same time, the sum of the movement speed of the piston 3112 of the first volume tube transfer pump 31 and the movement speed of the piston 3112 of the second volume tube transfer pump 32 is still equal to the target speed, and the acceleration values of the two are equal, so that the sum of the medium flow rate output by the first volume tube transfer pump 31 and the medium flow rate output by the second volume tube transfer pump 32 is equal to the preset flow rate. When the piston 3112 of the second volume pipe transfer pump 32 decelerates to zero, it moves right to the end of the pipe body 3111 away from the second medium port 3111b, at the same time, the piston 3112 of the first volume pipe transfer pump 31 accelerates to a target speed, and thereafter, the piston 3112 of the second volume pipe transfer pump 32 is stationary and the piston 3112 of the first volume pipe transfer pump 31 moves at a constant speed at the target speed for a while. As described above, the first volumetric tube transfer pump 31 and the second volumetric tube transfer pump 32 are sequentially operated to perform the exercise, and the timing charts of the respective states are shown in fig. 7 to 8, in which the solid line of the timing chart before and after the instantaneous flow rate is rectified in fig. 7 represents the timing of the first volumetric tube transfer pump, and the broken line represents the timing of the second volumetric tube transfer pump.

In the above operation, the on/off states of the four check valves in each state of the second volume tube transfer pump 32 may be referred to the first volume tube transfer pump 31, which is not described herein again. Although the pistons 3112 of the two flow rate sets sometimes move in opposite directions, and the first medium inlet 3111a (or the second medium inlet 3111 b) sometimes serves as a medium outlet and a medium inlet, but the directions of the outputs of the first volume pipe feed pump 31 and the second volume pipe feed pump 32 can be fixed after the flows are rectified by the four check valves.

In addition, the pistons 3112 (i.e., the driving motors) of the respective volumetric tube transfer pumps may be uniformly accelerated or uniformly decelerated during acceleration or deceleration, but this method is easy to control, but the impact on the volumetric tubes is relatively large, and therefore, in a preferred embodiment of the present application, the speed change of the respective pistons 3112 takes an S-shaped curve, as shown in fig. 9. And for the flow that produces, this application is also not limited to producing invariable instantaneous flow, can set up through the procedure, and control piston 3112 moves with arbitrary speed change law to produce the rivers of arbitrary continuous instantaneous flow, for example produce the rivers of ladder type instantaneous flow, the rivers of wave type instantaneous flow. Accordingly, the controller 40 also includes an external interface or touch display screen (described in detail below) to input programs.

Of course, the drive mechanism may also comprise a linear motor directly, the output shaft of which is directly connected to the piston 3112.

The first check valve 312, the second check valve 313, the third check valve 314, and the fourth check valve 315 may be mechanical valves, or may also be electromagnetic valves, when all of the electromagnetic valves are, control ends of the first check valve 312, the second check valve 313, the third check valve 314, and the fourth check valve 315 are all connected to the controller 40, and the controller 40 is further configured to control respective opening and closing of the first check valve 312, the second check valve 313, the third check valve 314, and the fourth check valve 315, so as to better coordinate with the motion of the driving motor 3113 for control.

It should be noted that although the above embodiments are described by taking two sets of volume tube transfer pumps as an example, the present application is not limited to only two sets of volume tube transfer pumps, and more sets of volume tube transfer pumps may be provided, and when more sets of volume tube transfer pumps are provided, when the number of volume tube transfer pumps is an even number, the present application may be equally divided into two parts, one part of the volume tube transfer pumps may be controlled in a manner of a first volume tube transfer pump, and the other part of the volume tube transfer pumps may be controlled in a manner of a second volume tube transfer pump. Of course, no matter the number of the volume pipe delivery pumps is odd or even, in the two divided parts, the number of the first volume pipe delivery pumps can be set to be not equal to that of the second volume pipe delivery pumps, and only the output flow of each volume pipe delivery pump needs to be adaptively adjusted, so that the sum of the output flows of the volume pipe delivery pumps is equal to the preset flow.

In the above embodiments, the connection between the pipelines, or the connection between the standard volume pipe and the check valves, may be a union joint or other interfaces. The connection between each pipeline can be direct connection, also can connect through the transition pipeline, for example first medium mouth 3111a connects between first check valve 312 and second check valve 313, specifically can realize through the transition pipeline, and first medium mouth 3111a is connected to the one end of transition pipeline promptly, and the other end is connected between first check valve 312 and second check valve 313, and interconnect between other pipelines can be analogized, and this is not repeated for one more.

In order to better observe the working state of the whole conveying device, at least part of the pipelines are transparent pipelines, such as the medium input pipeline 20, the connecting pipeline 50 and the like can be set to be transparent pipelines, so that the observation is convenient.

In addition, the metering type continuous conveyer further includes a display screen (not shown) connected to the controller 40, and in this embodiment, the controller 40 further controls the display screen to display the speed of the driving motor and the flow rate of the medium output pipe 10, so that the user can more intuitively know the conveying condition. Wherein in the embodiment where the mounting cabinet 70 is provided, preferably a display screen is located on the console 711 to further facilitate the user's viewing of the data.

Further, the display screen may be a touch display screen for inputting a preset flow rate, in this embodiment, the controller 40 determines the speed of the driving motor of each of the volumetric tube pumps according to the preset flow rate, such as the speed of the driving motors of the first volumetric tube pump 31 and the second volumetric tube pump 32, and controls the touch display screen to display the preset flow rate and the speed of the driving motor, so as to further facilitate the user operation. Of course, the input of the preset flow rate can also be input through other equipment, such as an external upper computer and the like.

It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.

It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious or equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the present application.

Claims

1. A flow-adjustable metering type continuous conveying device is characterized by comprising a medium input pipeline, a medium output pipeline, a controller and a flow stabilizing mechanism connected between the medium output pipeline and the medium input pipeline, wherein the flow stabilizing mechanism comprises a first volume pipe conveying pump and a second volume pipe conveying pump which are arranged in parallel,

each volume pipe delivery pump comprises a standard volume pipe and a rectification group arranged outside the standard volume pipe, the rectification group comprises a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve which are arranged in a bridge manner, the inlet end of the first one-way valve and the inlet end of the third one-way valve are respectively connected to the medium input pipeline, the outlet end of the first one-way valve is connected with the inlet end of the second one-way valve, and the outlet end of the third one-way valve is connected with the inlet end of the fourth one-way valve; the outlet end of the second one-way valve and the outlet end of the fourth one-way valve are respectively connected to the medium output pipeline; the standard volume tube comprises a tube body, a piston rod and a driving mechanism, the piston is slidably mounted in the tube body, the piston rod is connected to two sides of the piston, the driving mechanism drives the piston rod to move, a first medium port and a second medium port are respectively arranged at two ends of the tube body, the first medium port is connected between the first one-way valve and the second one-way valve, the second medium port is connected between the third one-way valve and the fourth one-way valve, and the cross sections of a volume cavity of the tube body along the sliding direction of the piston are consistent in area; the areas of the cross sections of the piston rods on the two sides of the piston are equal, the piston rods respectively extend out of the two ends of the tube body, one piston rod of each standard volume tube is connected with the driving mechanism, and the driving mechanism comprises a driving motor connected with the piston rod, so that when the piston moves, the amount of liquid discharged from the volume cavity is equal to the amount of liquid sucked;

wherein the standard volume pipe of the first volume pipe delivery pump and the standard volume pipe of the second volume pipe delivery pump are arranged side by side, and the pipe body of one of the two standard volume pipes is arranged side by side with the driving mechanism of the other one; the medium input pipeline is arranged side by side with the two standard volume pipes, and the medium output pipeline is positioned above the two standard volume pipes;

the controller is connected with each driving mechanism, determines a preset rotating speed according to the preset flow on the medium output pipeline, and then controls each driving motor according to the preset rotating speed to enable the rotating number of the driving motors to meet an equation

The medium output pipeline is connected with a medium output pipeline, wherein theta a and theta b are the rotating circles of each driving motor respectively, T is the rotating time of each driving motor, and Vc is a preset rotating speed determined according to a preset flow on the medium output pipeline;

meanwhile, when the controller controls the driving motor of the first volume pipe conveying pump to move in an accelerating mode, the driving motor of the second volume pipe conveying pump to move in a decelerating mode, and when one of the driving motor of the first volume pipe conveying pump and the driving motor of the second volume pipe conveying pump moves at a constant speed, the other one of the driving motor of the first volume pipe conveying pump and the driving motor of the second volume pipe conveying pump is controlled to be static, so that the sum of the instantaneous flow rate of the first volume pipe conveying pump and the instantaneous flow rate of the second volume pipe conveying pump is constant, and further the flow on the medium output pipeline is constant and can be continuously output;

when the driving mechanism pushes the piston to move from the second medium port to the first medium port, the first one-way valve and the fourth one-way valve are closed, the second one-way valve and the third one-way valve are communicated, when the piston moves from the first medium port to the second medium port, the first one-way valve and the fourth one-way valve are communicated, and the second one-way valve and the third one-way valve are closed, so that the medium flow directions of the volume tube delivery pump after being rectified by the rectifying group are consistent.

2. The metered continuous conveyor device according to claim 1, further comprising a display screen connected to said controller, said controller further controlling said display screen to display the speed of movement of said drive motor and the flow rate of said media output line.

3. The metering type continuous conveying device according to claim 2, wherein the display screen is a touch display screen for inputting a preset flow rate; and the controller determines the speeds of the driving motors of the first volume pipe delivery pump and the second volume pipe delivery pump according to the preset flow, and controls the touch display screen to display the preset flow and the movement speed of the driving motor.

4. The metering type continuous conveying device according to claim 1, wherein the medium input pipeline comprises a connecting branch pipe, a first branch pipe and a second branch pipe which are oppositely arranged and connected with two ends of the connecting branch pipe in a bending way; the flow stabilizing mechanism is arranged between the first branch pipe and the second branch pipe, and the first volume pipe conveying pump is closer to the first branch pipe than the second volume pipe conveying pump;

each rectification group further comprises a first connecting valve pipe and a second connecting valve pipe which are arranged side by side along the direction parallel to the axial direction of the standard volume pipe, a first extension valve pipe and a second extension valve pipe which are respectively connected with two ends of the first connecting valve pipe in a bending mode and extend along opposite directions, and a third extension valve pipe and a fourth extension valve pipe which are respectively connected with two ends of the second connecting valve pipe in a bending mode and extend along opposite directions; the first extension valve pipe, the second extension valve pipe, the third extension valve pipe and the fourth extension valve pipe are respectively provided with the first check valve, the second check valve, the third check valve and the fourth check valve; the standard volume pipe further comprises a first sub-pipe and a second sub-pipe, wherein the first sub-pipe and the first extension valve pipe are arranged in parallel in the opposite direction, the second sub-pipe and the third extension valve pipe are arranged in parallel in the opposite direction, two ends of the first sub-pipe are respectively connected with the first medium port and the first connection valve pipe, and two ends of the second sub-pipe are respectively connected with the second medium port and the second connection valve pipe; in the standard volume pipe of the first volume pipe conveying pump and the standard volume pipe of the second volume pipe conveying pump, second extension valve pipes and fourth extension valve pipes of the standard volume pipe of the first volume pipe conveying pump and the standard volume pipe of the second volume pipe conveying pump are arranged in a row in a direction parallel to the axial direction of the standard volume pipe and are respectively connected to the medium output pipeline; the first extension valve pipe and the third extension valve pipe of the first volume pipe delivery pump are connected to the first branch pipe, and the first extension valve pipe and the third extension valve pipe of the second volume pipe delivery pump are connected to the second branch pipe, wherein the relative direction refers to the relative direction of the first branch pipe and the second branch pipe.

5. The metering type continuous conveying device according to claim 4, further comprising a connecting pipeline and a first switch valve arranged on the connecting pipeline, wherein one end of the connecting pipeline is connected with the connecting branch pipe, and the other end of the connecting pipeline is connected with an output port of the medium output pipeline.

6. The metering continuous conveying device according to claim 5, wherein the medium input pipeline further comprises a water storage tank, a second switch valve and an input branch pipe connecting the water storage tank and the connecting branch pipe, one end of the input branch pipe is connected to the connecting pipeline, and the input branch pipe is positioned on one side of the second switch valve close to the connecting branch pipe; the second switch valve is arranged on the input branch pipe.

7. The metering type continuous conveying device according to claim 1, wherein the medium output pipeline comprises a confluence branch pipe and a detection branch pipe which are arranged side by side in the height direction, the detection branch pipe is used for connecting a meter to be detected, one end of the detection branch pipe is connected to the downstream of the confluence branch pipe, and the other end of the detection branch pipe is used as an output port of the medium output pipeline; and the second check valve and the fourth check valve are respectively connected with the confluence branch pipe.

8. The metered continuous conveyor apparatus of claim 7, further comprising a mounting cabinet, said mounting cabinet comprising a mounting rack and rollers, said mounting rack having a console, said sensing manifold being located above said console; the medium input pipeline, the flow stabilizing mechanism and the controller are all arranged below the operating platform; the rollers are mounted at the bottom of the mounting frame.

9. The metering continuous conveying device according to claim 8, further comprising an external output pipeline, wherein the external output pipeline is arranged above the operating platform, and one end of the external output pipeline is connected with an output port of the medium output pipeline.

10. The metered continuous feed device of any one of claims 1 to 9, wherein said drive mechanism further comprises a lead screw connected to said drive motor and a slider piston rod threadedly engaged with said lead screw, said piston rod slider being connected to said piston rod;