CN115839330B - Flow calculation control structure of peristaltic pump - Google Patents

Abstract

The patent application provides a peristaltic pump's flow calculation control structure, it includes magnetic ring, hall subassembly, base shell, lid, braking ring, friction ring and driving piece, and the magnetic ring is connected on the output shaft of motor one end, and the motor other end is connected with the conveyer pipe, is provided with many pairs of magnetic poles on the magnetic ring, and hall subassembly is located one side of magnetic ring in order to respond to the switching of the magnetic pole of magnetic ring in order to calculate the number of turns of turning, and then calculates peristaltic pump's flow. The braking ring is connected to the output shaft of the motor and is located on the same side with the magnetic ring, the motor is arranged in the base shell, the cover body wraps the peripheries of the magnetic ring and the braking ring and is connected with the base shell, the friction ring is movably arranged on the inner wall of the cover body, the driving piece is used for driving the friction ring to move, so that the friction ring is controlled to be contacted with or far away from the braking ring, the driving piece controls the liquid inlet check valve on the conveying pipe or controls the liquid outlet check valve to be opened and closed through the connecting rod assembly, finer turns can be calculated by utilizing the multipolar magnetic ring, and meanwhile, the flow is controlled more accurately.

Description

Flow calculation control structure of peristaltic pump

The application relates to a divisional application, the application number of the original application is 202111640640.5, the application date is 2021, 12 months and 29 days, and the application name is a peristaltic pump with accurate flow control.

Technical Field

The invention relates to the field of peristaltic pump components, in particular to a flow calculation control structure of a peristaltic pump.

Background

Peristaltic pumps squeeze a fluid filled hose through rollers and pump fluid through a plurality of rollers alternately squeezing and releasing the hose as the rollers slide the fluid forward within the tube. Many peristaltic pumps need to detect and control the flow, but the peristaltic pumps in the prior art do not have very high accuracy in controlling the flow.

It is therefore desirable to provide a flow calculation control structure for peristaltic pump to solve the above-mentioned problems.

Disclosure of Invention

The invention provides a flow calculation control structure of a peristaltic pump, which aims to solve the problem that the peristaltic pump in the prior art is low in accuracy of flow control.

In order to solve the technical problems, the technical scheme includes that the flow calculation control structure of the peristaltic pump comprises a magnetic ring, a Hall assembly, a circuit assembly, a base shell, a cover body, a brake ring, a friction ring and a driving piece, wherein the magnetic ring is connected to an output shaft at one end of a motor;

The braking ring is connected to an output shaft of the motor and is located on the same side with the magnetic ring, the motor is arranged in the base shell, the cover body wraps the magnetic ring and the periphery of the braking ring and is connected with the base shell, the friction ring is movably arranged on the inner wall of the cover body, the driving piece is connected with the base shell and is used for driving the friction ring to move so as to control the friction ring to contact or be far away from the braking ring, and the conveying pipe is at least provided with a liquid inlet check valve or a liquid outlet check valve, and the driving piece controls the liquid inlet check valve or controls the opening and closing of the liquid outlet check valve through the connecting rod assembly.

In the invention, two ends of the conveying pipe are respectively provided with a liquid inlet and a liquid outlet, the liquid inlet is connected with a liquid inlet check valve, the liquid outlet is connected with a liquid outlet check valve, the liquid inlet check valve is rotatably provided with a liquid inlet switch handle for controlling opening and closing, the liquid outlet check valve is rotatably provided with a liquid outlet switch handle for controlling opening and closing, and the driving piece is connected with the liquid inlet switch handle and the liquid outlet switch handle through a connecting rod assembly;

when the driving piece controls the friction ring to be in contact with the braking ring, the connecting rod assembly drives the liquid inlet switch handle to be closed, and the connecting rod assembly drives the liquid outlet switch handle to be closed;

When the driving piece controls the friction ring to be far away from the braking ring, the connecting rod assembly drives the liquid inlet switch handle to be opened, and the connecting rod assembly drives the liquid outlet switch handle to be opened.

The connecting rod assembly comprises a driving plate and first connecting plates symmetrically arranged at two ends of the driving plate, the driving piece is connected with the driving plate, and one first connecting plate is correspondingly connected with one lug;

The liquid inlet and the liquid outlet of the conveying pipe extend out from the same side of the shell, the connecting rod assembly further comprises a second connecting plate, one end of the second connecting plate is connected with the driving plate, two supporting rods are arranged on two sides of the other end of the second connecting plate, long-strip-shaped grooves are formed in the supporting rods, and the liquid inlet switch handle and the liquid outlet switch handle are movably connected with one long-strip-shaped grooves through rotating shafts respectively.

Further, the surface of one side of the base shell is an arc-shaped surface, the driving plate is an arc-shaped plate, and the driving plate is in sliding flat adhesion with the surface of the base shell.

Further, a first sliding sleeve is arranged on the base shell, the first connecting plate penetrates through the first sliding sleeve and forms sliding connection, a second sliding sleeve is arranged on the shell, and the second connecting plate penetrates through the second sliding sleeve and forms sliding connection.

In addition, the end part of the first connecting plate is provided with a clamping column, and the connecting rod assembly further comprises a screw rod, a nut, a rotating ring and a rotating cover;

The screw rod is characterized in that a connecting hole for being clamped with the clamping column is formed in the screw rod head of the screw rod, the nut is in threaded connection with the screw rod, an opening groove is formed in the lug, a transfer convex portion is arranged on the periphery of the opening groove, the rotating ring is rotationally connected with the transfer convex portion, the rotating axis is consistent with the axial center line of the screw rod, the rotating ring is a non-closed ring with a fracture, the rotating cover is fixedly connected with the rotating ring, the screw rod penetrates through the opening groove and the rotating cover, and the rotating cover wraps the nut to drive the nut to rotate.

Further, a fixed column is arranged on the rotary ring, and a fixed hole matched with the fixed column is arranged on the rotary cover.

Optionally, a clamping post is arranged at the end part of the first connecting plate, and the connecting rod assembly further comprises a screw, a nut and a spring;

the screw rod is characterized in that a connecting hole for being clamped with the clamping column is formed in the screw rod head of the screw rod, the spring is sleeved on the screw rod, the screw rod penetrates through the lug, the nut is in threaded connection with the screw rod, and the nut and the spring are respectively located on two sides of the lug.

Compared with the prior art, the peristaltic pump flow calculation control structure has the advantages that finer turns can be calculated by utilizing the multipole magnetic ring, and meanwhile, flow control is more accurate.

In addition, the friction ring is driven to contact or be far away from the brake ring by the driving piece, the liquid inlet check valve is driven to be opened or closed by the liquid inlet switch handle, and the liquid outlet check valve is driven to be opened or closed by the liquid outlet switch handle, so that the synchronous rotating frame can be stably in a static state when the motor stops working, fluid backflow is prevented, and the accuracy of flow control is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments are briefly described below, and the drawings in the following description are only drawings corresponding to some embodiments of the present invention.

Fig. 1 is a schematic structural diagram of a first embodiment of a peristaltic pump with accurate flow control according to the present invention.

Fig. 2 is an enlarged view of a partial structure at a in fig. 1.

Fig. 3 is a schematic view of the structure of the rotating frame and the roller in the first embodiment.

Fig. 4 is a cross-sectional view of the turret and rollers to adjust the assembly in the first embodiment.

Fig. 5 is an enlarged view of a partial structure at B in fig. 4.

Fig. 6 is another state diagram of the structure of fig. 5.

Fig. 7 is a schematic structural diagram of a second embodiment of a peristaltic pump with precise flow control according to the present invention.

Fig. 8 is a schematic structural view of a magnetic ring, a brake ring, and a friction ring in the second embodiment.

Fig. 9 is a schematic diagram of the cooperation of the magnetic ring and the hall assembly in the second embodiment.

Fig. 10 is an enlarged view of a partial structure at C in fig. 7.

Fig. 11 is a schematic view of the structure of the lug, the rotary ring and the rotary cover in the second embodiment.

Fig. 12 is a schematic diagram of a connection structure of the second connection plate and the liquid inlet switch handle in the second embodiment.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terms of directions used in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are used for explaining and understanding the present invention only with reference to the orientation of the drawings, and are not intended to limit the present invention.

The words "first," "second," and the like in the terminology of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance and not as limiting the order of precedence.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and are for example, as being a releasable connection, as being a one-piece structure, as being a mechanical connection, as being an electrical connection, as being a direct connection, as being an indirect connection via an intermediary, as being a communication between two elements or as being an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Peristaltic pumps are devices that squeeze a hose with rollers to deliver fluid, squeeze a fluid-filled hose with rollers, and as the rollers slide forward the fluid in the tube forward, pump the fluid through alternating squeezing and releasing of the hose with rollers, and to prevent backflow of the fluid, the pressure on the hose must be maintained by the rollers at all times to achieve tightness. The pressure depends on the degree of tightness of the roller on the hose, the pressure pipe is looser, the pressure is smaller, the service life of the hose is longer, but the conveying effect may not meet the requirement, on the contrary, the pressure pipe is tighter, the pressure is larger, the hose is fatigued and worn relatively more when the pressure is higher to a certain degree, and the service life of the hose is also short. In the prior art, certain pressure is required between the roller and the hose, so that the roller and the hose are difficult to assemble, the assembled compression relationship is fixed and cannot be adjusted, and the flow cannot be accurately controlled due to poor matching between the components.

On the other hand, many peristaltic pumps need to detect and control the flow, but the peristaltic pumps of the prior art do not have very high accuracy in controlling the flow. The pressure between the roller and the hose is often not ideal due to the deviation in manufacturing, assembling and the like, and the pressure of the roller on the hose is also a factor causing low flow accuracy.

The following is a first embodiment of a peristaltic pump capable of precisely controlling flow rate, which can solve the above technical problems.

Referring to fig. 1, 2 and 3, fig. 1 is a schematic structural diagram of a peristaltic pump with accurate flow control according to a first embodiment of the present invention, fig. 2 is an enlarged partial structural diagram of a portion a in fig. 1, and fig. 3 is a schematic structural diagram of a rotating frame and a roller in the first embodiment.

In the drawings, like structural elements are denoted by like reference numerals.

The invention provides a peristaltic pump capable of accurately controlling flow, which comprises a rotating frame 16, a motor 11, a roller 17, a shell 121 and a conveying pipe 14.

The motor 11 is connected with the rotating frame 16 to drive the rotating frame 16 to rotate, it can be appreciated that the motor 11 and the rotating frame 16 can be in transmission connection through a gear system, and the gear transmission mode is a mature prior art, and is not described herein.

The roller 17 is rotatably arranged on the periphery of the rotating frame 16, the rotation axis of the roller 17 is parallel to the rotation axis of the rotating frame 16, the shell 121 is wrapped outside the rotating frame 16, the shell 121 is connected with the motor 11, and the motor 11 is arranged in the corresponding base shell 122.

The conveying pipe 14 is circumferentially arranged on the periphery of the rotating frame 16, the conveying pipe is arranged between the wheel surface of the roller 17 and the inner wall surface of the shell 121 in a squeezing mode, and the rotating frame 16 rotates to enable the roller 17 to roll and squeeze along the conveying pipe 14, so that liquid in the conveying pipe 14 is driven to flow.

In this embodiment, the peristaltic pump further includes an adjusting component, and the rotating frame 16 includes a fixed frame 161 and a movable frame 162.

The movable frame 162 is slidably disposed on the periphery of the fixed frame 161, the rollers 17 are rotatably disposed on the inner side of the movable frame 162, the axes of the rollers 17 are located on the same construction circle, the sliding direction of the movable frame 162 is along the diameter direction of the construction circle, the adjusting component is disposed on the housing 121, and the adjusting component is connected with the movable frame 162 and is used for driving the movable frame 162 to slide, so that the distance between the rollers 17 is adjusted, namely, the diameter of the construction circle is correspondingly adjusted, and the larger the diameter of the construction circle is, the more the rollers 17 squeeze the conveying pipe 14.

Before assembly, the diameter of the construction circle of the roller 17 is reduced, so that assembly is easier, after assembly, the diameter of the construction circle of the roller 17 is readjusted according to the use effect and the requirement, so that the pressure of the roller 17 to the conveying pipe 14 is moderate, the service life of the conveying pipe is longer, the conveying pipe has higher conveying engraving and fine extruding conveying efficiency, and the conveying requirement can be met.

Referring to fig. 3 and 4, in the present invention, the adjusting assembly includes a screw member 14, a connecting rod 18, and a connecting member 19.

The connecting piece 19 is located the inside of mount 161, the week side of connecting piece 19 all passes through connecting rod 18 and the movable frame 162 swing joint that corresponds, screw rod spare 14 and casing 121 threaded connection, and screw rod spare 14 and the one side that connecting piece 19 kept away from connecting rod 18 are rotated and are connected, in fig. 4, connecting rod 18 is the sagging state relative to connecting piece 19, screw rod spare 14 is connected with the top surface of connecting piece 19, when screw rod spare 14 rotatory moves down, can extrude the movable frame 162 outside activity extension through connecting piece 19 and connecting rod 18 to can improve the extrusion volume to conveyer pipe 14.

It is conceivable that the screw member 14 may be connected to the connection member 19 by a bearing, since the turret 16 rotates relative to the housing 121 during operation, as in the present embodiment the screw member 14 is connected to the connection member 19 by a planar bearing 1A.

Wherein, be provided with mounting hole 1614 on the mount 161, adjusting part still includes spring 1B, and spring 1B and connecting piece 19 all are located mounting hole 1614, and spring 1B connects between mounting hole 1614's diapire and connecting piece 19, and spring 1B is located the another side opposite with screw member 14, and movable frame 162 is in the sliding stroke, and spring 1B is in compression state all the time, and plane bearing 1A can keep the contact with connecting piece 19 voluntarily.

Further, the fixing frame 161 includes a fixing cylinder 1612, a bottom plate 1613 and a top plate 1611 arranged in parallel, the fixing cylinder 1612 is arranged between the bottom plate 1613 and the top plate 1611, and the mounting holes 1614 penetrate through the top plate 1611 and the fixing cylinder 1612.

Wherein, the bottom plate 1613 and the top plate 1611 are both provided with a sliding slot 1615 for limiting the sliding of the movable frame 162, and the movable frame 162 is provided with a sliding block adapted to the sliding slot 1615, so as to ensure the stable movement of the movable frame 162. As shown in fig. 3, a through slot is provided in the side wall of the fixed barrel 1612 through which the connecting rod 18 can extend into the mounting hole 1614.

In this embodiment, the connecting member 19 includes a first locking member 191 and a second locking member 192, the two sides of the end of the connecting rod 18 away from the movable frame 162 are provided with a rotating column 181, and the rotating column 181 is clamped by the first locking member 191 and the second locking member 192, so that the rotating column 181 is rotationally connected with the connecting member 19, and it can be understood that grooves adapted to the rotating column 181 are formed on the first locking member 191 and the second locking member 192.

In this embodiment, the mounting hole 1614 is a square hole, and the connecting member 19 is a square structure, so that the first locking member 191 and the second locking member 192 can slide along the mounting hole 1614 in a directional manner, and the forward butt joint between the rotating column and the connecting member 19 is facilitated by the directional sliding. When the rotary column is installed, the spring 1B is installed in the installation hole 1614, the first locking member 191 is installed in the installation hole 1614, the connecting rod 18 extends into the installation hole 1614, the second locking member 192 is installed in the installation hole 1614, the first locking member 191 and the second locking member 192 can be locked through screw connection, and the rotary column 181 is locked between the first locking member 191 and the second locking member 192.

It is easy to think that the mounting hole 1614 may be designed as a circular hole, and a positioning chute is provided on the hole wall, and a positioning protrusion corresponding to the positioning chute is provided on one side of the connecting piece 19, so that the connecting piece 19 and the connecting rod 18 are assembled in the forward direction.

Referring to fig. 2, 5 and 6, in the present invention, the adjusting assembly further includes a rotating member 15, the rotating member 15 is movably connected to the housing 121, the screw member 14 is in threaded connection with the rotating member 15, the rotating member 15 includes a clamping position and a rotating position on a moving track of the housing 121, and the clamping position is closer to the connecting member 19 than the rotating position, i.e. the rotating member 15 slides downward as shown in fig. 5 to achieve the clamping position.

When the rotary member 15 is in the rotation position, the rotary member 15 is rotatable relative to the housing 121, and the rotation axis of the rotary member 15 is coaxial with the axial center line of the screw member 14, so that a locking effect is provided between the screw member 14 and the rotary member 15, and meanwhile, due to the presence of the spring 1B, the rotary member 15 can be elastically pressed to be kept in the rotation position, and at this time, the rotary screw member 14 is idle.

It is easily conceivable that balls, lubricating oil or the like may be provided between the rotary member 15 and the inner wall of the accommodation groove 1211 so that the rotary member can be more smoothly idly rotated, improving the anti-loosening effect of the screw member.

When the rotary member 15 is positioned in the click position, the rotary member 15 is not rotatable relative to the housing 121, so that relative rotation is possible between the screw member 14 and the rotary member 15. The rotating member 15 is controlled to be pressed down by applying an external force for a certain distance, so that the rotating member 15 moves to be clamped and fixed, and the screw member 14 can be rotated at this time, so that the extrusion amount of the screw member 14 to the connecting member 19 is adjusted, and the extrusion amount of the roller 17 to the conveying pipe 14 is adjusted.

Referring to fig. 5, in the present embodiment, a housing 121 is provided with a receiving groove 1211 for mounting a rotating member 15, a latch 154 is provided on a peripheral side of the rotating member 15, a latch 1212 corresponding to the latch 154 is provided on an inner wall of the receiving groove 1211, when the rotating member 15 is positioned at the retaining position, the latch 154 is connected to the latch 1212, and when the rotating member 15 is positioned at the rotating position, the latch 154 and the latch 1212 are dislocated.

In the present embodiment, the rotating member 15 includes the pressing portion 151, the pressing portion 151 extends to protrude outside the housing 121, and the pressing portion 151 is used to be pressed so that the rotating member 15 slides to be clamped, and the operation is convenient.

Wherein, the opposite both sides of rotating member 15 all are provided with pressing portion 151, and pressing portion 151 keeps away from the one end rotation of rotating member 15 and is provided with blocking member 152, and blocking member 152's first end is located pressing portion 151 and keeps away from the one side of casing 121, and blocking member 152's second end is located pressing portion 151 and is close to on the one side of casing 121, is provided with torsional spring 155 in the axis of rotation between blocking member 152 and the pressing portion 151, and blocking member 152 includes locking position and unlocking position on the rotation orbit.

As shown in fig. 5, when the blocking member 152 is positioned at the locking position, the second end of the blocking member 152 is restricted between the pressing portion 151 and the housing 121, thereby restricting the rotation member 15 from sliding toward the locking position, and the torsion spring 155 drives the rotation member 15 to be maintained at the locking position, wherein it is understood that the blocking member 152 is rotatably provided in the mounting groove at one end of the pressing portion 151, when the blocking member 152 is positioned at the locking position, the blocking member 152 is inclined with respect to the surface of the housing 121, and the blocking member 152 is in contact with the inner wall of the mounting groove, so that the blocking member 152 cannot be rotated in a more inclined direction.

When the blocking member 152 is located at the locking position, the upper surface of the rotating member 15 contacts the inner top surface of the receiving groove 1211, so that a certain external force needs to be applied to press the pressing portion 151 to deform, so that the blocking member 152 can be rotationally unlocked to the outer periphery, thereby ensuring that the blocking member 152 can be located at the locking position more stably.

As shown in fig. 6, when the blocking member 152 is in the unlocking position, the first ends of the two blocking members 152 on the two pressing portions 151 are close to each other, so that the second ends of the blocking members 152 rotate toward the outer periphery, and the pressing portions 151 can be close to the housing 121, and the rotating member 15 can slide toward the locking position.

In this embodiment, the first end of the blocking member 152 is of an arc structure, one side of the first end of the blocking member 152, which is close to the screw member 14, is a concave side, and the pressing portion 151 is provided with a position avoidance hole 153 for avoiding the second end of the blocking member 152, so that when the blocking member 152 slides to the unlocking position, the bottom end of the blocking member 152 can be furthest far away from the housing 121, and the space utilization rate is higher.

When the peristaltic pump with accurate flow control in this embodiment is assembled and used, the rollers 17, the fixing frame 161, the movable frame 162, the connecting piece 19 and the spring 1B can be connected and assembled firstly, at this time, under the elastic extrusion force of the spring 1B, the rollers 17 slide inwards and gather, and the diameters of the structural circles where the axes of the rollers 17 are located are the smallest, so that the peristaltic pump is convenient to assemble with the housing 121;

On the other hand, the housing 121, the rotating member 15 and the screw member 14 are assembled in a connecting manner, then the conveying pipe 13 is wound around the periphery of the roller 17, and then the conveying pipe is assembled in a connecting manner with the housing 121, after the assembly is completed, the blocking member 152 can be pressed to be located in an unlocking position, the rotating member 15 is driven to slide to be clamped and retained by force, and at the moment, the clamping teeth 154 and the clamping grooves 1212 are in butt fit, so that the screw member 14 can be rotated, the extrusion amount of the screw member 14 to the connecting member 19 can be adjusted, and the extrusion amount of the roller 17 to the conveying pipe 14 can be adjusted.

The peristaltic pump is accurately controlled to flow in this embodiment after the assembly, can adjust the position between mount and the movable rack through adjusting component to can adjust the extrusion volume of running roller pair conveyer pipe, both made things convenient for the assembly, also make simultaneously and can be according to the fluid output condition, adjust the pressure between running roller and the conveyer pipe, reach the purpose of accurate control to flow.

Referring to fig. 7 and 8, the following is a second embodiment of a peristaltic pump capable of precisely controlling the flow rate.

A peristaltic pump with accurate flow control comprises a rotating frame, a motor 21, rollers, a shell 23 and a conveying pipe 26.

The motor 21 is connected with the rotating frame to drive the rotating frame to rotate, the roller wheel is arranged on the peripheral side of the rotating frame, the rotating axis of the roller wheel is parallel to the rotating axis of the rotating frame, the shell 23 is wrapped outside the rotating frame, the shell 23 is connected with the motor 21, the conveying pipe 26 is arranged on the peripheral side of the rotating frame in a surrounding mode, the extruding device is arranged between the wheel surface of the roller wheel and the inner wall surface of the shell 23, the rotating frame rotates to enable the roller wheel to roll and extrude along the conveying pipe 26, liquid in the conveying pipe 26 is driven to flow, and the structure and principle of fluid pumping are consistent with those of the first embodiment, so that reference can be made to the drawing of the first embodiment.

In this embodiment, output shafts extend from two ends of the motor 21, an output shaft at one end of the motor 21 is connected with a rotating frame, it is understood that the motor 21 and the rotating frame may be connected through a transmission system, such as a planetary gear system, an output shaft at the other end is connected with a magnetic ring 27, the peristaltic pump further includes a hall assembly 2A, a plurality of pairs of magnetic poles are disposed on the magnetic ring 27, the hall assembly 2A is located at one side of the magnetic ring 27, the hall assembly 2A is used for sensing the switching of the magnetic poles of the magnetic ring 27 to calculate the number of rotation turns, thereby calculating the flow of the peristaltic pump, and finer turns can be calculated by using the multipolar magnetic ring, and meanwhile, the flow is controlled more accurately.

One end of the motor 21 is connected with a circuit assembly 211, and the circuit assembly 211 is electrically connected with the motor 21 and the Hall assembly 2A.

Referring to fig. 7 and 8, in the present embodiment, the peristaltic pump further includes a base housing 221, a cover 222, a brake ring 28, a friction ring 29, and a driving member 24.

The braking ring 28 is connected to the output shaft of the motor 21 and is located on the same side as the magnetic ring 27, the motor 21 is arranged in the base shell 221, the cover 222 is wrapped on the peripheries of the magnetic ring 27 and the braking ring 28 and is connected with the base shell 221, the friction ring 29 is movably arranged on the inner wall of the cover 222, and the driving piece 24 is connected with the base shell 221 and is used for driving the friction ring 29 to move so as to control the friction ring 29 to be contacted with or separated from the braking ring 28.

Wherein, the two ends of the conveying pipe 26 are respectively provided with a liquid inlet and a liquid outlet. The peristaltic pump further comprises a liquid inlet check valve 261 and a liquid outlet check valve 262, wherein the liquid inlet check valve 261 is connected to the liquid inlet, and the liquid outlet check valve 262 is connected to the liquid outlet. The liquid inlet check valve 261 is rotatably provided with a liquid inlet switch Guan Bing 2611 for controlling opening and closing, the liquid outlet check valve 262 is rotatably provided with a liquid outlet switch handle 2621 for controlling opening and closing, and the driving piece 24 is connected with the liquid inlet switch Guan Bing 2611 and the liquid outlet switch handle 2621 through a connecting rod assembly.

When the driving piece 24 controls the friction ring 29 to contact with the brake ring 28, the connecting rod assembly drives the liquid inlet opening Guan Bing 2611 to be closed, and the connecting rod assembly drives the liquid outlet switch handle 2621 to be closed.

When the driving member 24 controls the friction ring 29 to be away from the brake ring 28, the rod assembly drives the liquid inlet switch handle 2611 to open, and the rod assembly drives the liquid outlet switch handle 2621 to open.

Therefore, when the motor 21 stops working, the friction ring 29 can be contacted with the brake ring 28, so that the stable stop of the output shaft of the motor 21 is ensured, and meanwhile, the liquid inlet switch Guan Bing 2611 and the liquid outlet switch handle 2621 are closed in a driving control mode, the backflow of fluid is prevented, and the accuracy of flow control is improved. And the same driving piece 24 is used for driving two structures, so that the cost is low, the efficiency is high, and the synchronism is good.

In this embodiment, please refer to fig. 7 and 10. The friction ring 29 is symmetrically provided with lugs 291 at both ends, and the lugs 291 extend through the cover 222. As shown in fig. 10, a through slot for the lug 291 to extend through is provided in the cover 222, and an unsealed opening is provided at one side of the through slot, so that the lug can be conveniently mounted, and the opening of the through slot is shielded by the base housing 221.

Referring to fig. 7, the link assembly includes a driving plate 251 and first connecting plates 252 symmetrically disposed at two ends of the driving plate 251, the driving member 24 is connected to the driving plate 251, and one first connecting plate 252 is correspondingly connected to one lug 291. The driving member 24 may be a conventional linear driving device such as an electric push rod and an electric cylinder.

Referring to fig. 12, the liquid inlet and the liquid outlet of the conveying pipe 26 extend from the same side of the housing 23, the connecting rod assembly further includes a second connecting plate 253, one end of the second connecting plate 253 is connected to the driving plate 251, two supporting rods (for example, two supporting rods in fig. 12 can be connected into an integral structure) are disposed on two sides of the other end, and a long-strip-shaped groove 2531 is disposed on each supporting rod, and the liquid inlet valve Guan Bing 2611 and the liquid outlet switch handle 2621 are movably connected with the long-strip-shaped groove 2531 through a rotating shaft 2532 respectively, so that the opening and closing of the liquid inlet check valve 261 and the liquid outlet check valve 262 can be controlled in the process of moving the second connecting plate 253 up and down.

In this embodiment, one side surface of the base shell 221 is an arc surface, the driving plate 251 is an arc plate, and the driving plate 251 slides and is flatly attached to the surface of the base shell 221, so that the sliding is stable.

In addition, the base shell is provided with a first sliding sleeve 223, a first connecting plate 252 penetrates through the first sliding sleeve 223 and forms sliding connection, the shell 23 is provided with a second sliding sleeve 231, and a second connecting plate 253 penetrates through the second sliding sleeve 231 and forms sliding connection, so that stability of driving sliding is provided.

Referring to fig. 11, in the present embodiment, a clamping post 2521 is disposed at an end of the first connecting plate 252, and the connecting rod assembly further includes a screw 2B1, a nut, a rotating ring 2B3, and a rotating cover 2B2.

The screw head of the screw 2B1 is provided with a connecting hole for clamping with the clamping column 2521, and the nut is in threaded connection with the screw 2B 1.

The lug 291 is provided with an opening groove 2911, a transfer convex portion 2911 is arranged on the periphery of the opening groove 2911, a rotary ring 2B3 is rotationally connected with the transfer convex portion 2912, the rotation axis is consistent with the axial center line of the screw rod 2B1, the rotary ring 2B3 is a non-closed ring with a fracture, assembly is facilitated, the rotary cover 2B2 is fixedly connected with the rotary ring 2B3, the screw rod 2B1 penetrates through the opening groove 2911 and the rotary cover 2B2, the rotary cover 2B2 wraps a nut to drive the nut to rotate, and therefore the movement stroke of the friction ring 29 can be adjusted, and the inner side of the rotary cover 2B2 is an inner hexagonal cavity matched with the nut.

The connection between the rotary cover 2B2 and the rotary ring 2B3 may be a conventional manner such as clamping, welding, etc. As shown in fig. 11, a fixed column may be provided on the rotary ring 2B3, and a fixed hole matching the fixed column may be provided on the rotary cover 2B 2.

It will be appreciated that the nut may also be made as a non-standard structure integral with the rotary cap 2B 2. The advantage of the split structure of the nut and the spin cover 2B2 is that the nut is a standard piece, the acquisition cost is low, and even if the nut is damaged, the spin cover 2B2 can be used continuously.

In addition, it should be noted that a spring may be sleeved on the screw 2B1, the spring is located between the screw head and the lug 291, and the nut and the spring are located at two sides of the lug 291, respectively, so that the overall cost is low, but the disadvantage of providing the spring is that the elastic force of the spring may interfere with the driving of the driving member 24 to some extent, and the spring is more prone to fatigue failure.

In this embodiment, the peristaltic pump may also be provided with the structure of the first embodiment. For example, the peristaltic pump may further include an adjustment assembly, and the rotating frame may further include a fixed frame and a movable frame.

The movable frame slides and sets up in the week side of mount, and the running roller rotates the inboard that sets up at the movable frame, and the axis of a plurality of running rollers is located same construction circle, and the direction of sliding of movable frame is along the diameter direction of construction circle, and adjusting part sets up on casing 23, and adjusting part is connected with the movable frame for drive movable frame slides, thereby adjusts the distance between the running roller.

Wherein, adjusting part includes screw rod, connecting rod and connecting piece.

The connecting piece is located the inside of mount, and the week side of connecting piece all passes through connecting rod and corresponding movable frame swing joint, screw rod spare and casing 23 threaded connection, and screw rod spare and connecting piece keep away from the one side rotation of connecting rod and be connected.

Further, be provided with the mounting hole on the mount, adjusting part still includes the spring, and spring and connecting piece all are located the mounting hole, and spring coupling is between the inner wall of mounting hole and connecting piece, and the spring is located the another side opposite with the screw rod spare, and the fly frame is in compression state all the time in sliding travel.

The mount includes fixed section of thick bamboo and parallel arrangement's bottom plate and roof, and fixed section of thick bamboo sets up between bottom plate and roof, and the mounting hole link up the roof and slide into fixed section of thick bamboo.

The screw rod spare is close to the one end of connecting piece and is connected with plane bearing, and plane bearing and connecting piece contact, and the connecting piece includes first retaining member and second retaining member, and the both sides of the one end that the movable frame was kept away from to the connecting rod are provided with the steering column, and first retaining member and second retaining member rotate centre gripping steering column.

The details of the adjustment of the turret by the adjustment assembly will not be described herein, and reference may be made to the first embodiment.

The working principle of the peristaltic pump is precisely controlled by the flow, namely, the motor 21 drives the rotating frame to rotate so as to squeeze the conveying pipe 26 to pump fluid, the driving piece 24 drives the friction ring 29 to be far away from the brake ring 28 while the motor 21 works, and simultaneously drives the liquid inlet switch handle 2611 to open the liquid inlet check valve 261 and drives the liquid outlet switch handle 2621 to open the liquid outlet check valve 262.

While the motor 21 stops working, the driving member 24 receives the signal and synchronously drives the friction ring 29 to contact with the brake ring 28, simultaneously drives the liquid inlet opening Guan Bing 2611 to close the liquid inlet check valve 261, and drives the liquid outlet opening Guan Bing 2621 to close the liquid outlet check valve 262, so that the rotating frame is in a stationary state stably, fluid backflow is prevented, and the flow is controlled more accurately.

The peristaltic pump with the accurate flow control can calculate finer turns by utilizing the multipolar magnetic ring, and meanwhile, the peristaltic pump with the accurate flow control is more accurate.

In addition, the friction ring is driven to contact or be far away from the brake ring by the driving piece, the liquid inlet check valve is driven to be opened or closed by the liquid inlet switch handle, and the liquid outlet check valve is driven to be opened or closed by the liquid outlet switch handle, so that the synchronous rotating frame can be stably in a static state when the motor stops working, fluid backflow is prevented, and the accuracy of flow control is improved.

In summary, although the present invention has been described in terms of the above embodiments, the above embodiments are not intended to limit the invention, and those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention, so the protection scope of the invention is defined by the claims.

Claims (6)

1. The utility model provides a peristaltic pump's flow calculation control structure which characterized in that, including magnetic ring, hall subassembly, circuit subassembly, base shell, lid, braking ring, friction ring and driving piece, the magnetic ring is connected on the output shaft of motor one end, the other end of motor is connected with the conveyer pipe, be provided with many pairs of magnetic poles on the magnetic ring, hall subassembly is located one side of magnetic ring, circuit subassembly electric connection motor and hall subassembly, hall subassembly is used for responding to the switching of magnetic pole of magnetic ring in order to calculate the rotation number of turns, and then calculate peristaltic pump's flow;

The braking ring is connected to an output shaft of the motor and is positioned on the same side as the magnetic ring, the motor is arranged in the base shell, the cover body is wrapped on the peripheries of the magnetic ring and the braking ring and is connected with the base shell, the friction ring is movably arranged on the inner wall of the cover body, the driving piece is connected with the base shell and is used for driving the friction ring to move so as to control the friction ring to contact or be far away from the braking ring, and the conveying pipe is at least provided with a liquid inlet check valve or a liquid outlet check valve, and the driving piece controls the liquid inlet check valve or controls the opening and closing of the liquid outlet check valve through the connecting rod assembly;

The two ends of the conveying pipe are respectively provided with a liquid inlet and a liquid outlet, the liquid inlet is connected with a liquid inlet check valve, the liquid outlet is connected with a liquid outlet check valve, the liquid inlet check valve is rotatably provided with a liquid inlet switch handle for controlling opening and closing, the liquid outlet check valve is rotatably provided with a liquid outlet switch handle for controlling opening and closing, and the driving piece is connected with the liquid inlet switch handle and the liquid outlet switch handle through a connecting rod assembly;

when the driving piece controls the friction ring to be in contact with the braking ring, the connecting rod assembly drives the liquid inlet switch handle to be closed, and the connecting rod assembly drives the liquid outlet switch handle to be closed;

When the driving piece controls the friction ring and the braking ring to be far away, the connecting rod assembly drives the liquid inlet switch handle to be opened, and the connecting rod assembly drives the liquid outlet switch handle to be opened;

the two ends of the friction ring are symmetrically provided with lugs, the cover body is provided with through grooves for the lugs to extend out, one side of each through groove is an opening which is not closed for installing the lugs, the connecting rod assembly comprises a driving plate and first connecting plates symmetrically arranged at the two ends of the driving plate, the driving piece is connected with the driving plate, and one first connecting plate is correspondingly connected with one lug;

The liquid inlet and the liquid outlet of the conveying pipe extend out from the same side of the shell of the peristaltic pump, the connecting rod assembly further comprises a second connecting plate, one end of the second connecting plate is connected with the driving plate, two sides of the other end are provided with two supporting rods, the supporting rods are provided with strip-shaped grooves, and the liquid inlet switch handle and the liquid outlet switch handle are respectively and movably connected with one strip-shaped groove through a rotating shaft.

2. The flow rate calculation control structure of claim 1, wherein a side surface of the base housing is an arcuate surface, the drive plate is an arcuate plate, and the drive plate is slidably mounted on the surface of the base housing.

3. The flow rate calculation control structure of claim 2, wherein a first sliding sleeve is provided on the base housing, the first connecting plate penetrates the first sliding sleeve and forms a sliding connection, a second sliding sleeve is provided on the housing, and the second connecting plate penetrates the second sliding sleeve and forms a sliding connection.

4. The flow rate calculation control structure according to claim 3, wherein the end portion of the first connection plate is provided with a snap-in post, and the link assembly further comprises a screw, a nut, a swivel ring, and a swivel cover;

The screw rod is characterized in that a connecting hole for being clamped with the clamping column is formed in the screw rod head of the screw rod, the nut is in threaded connection with the screw rod, an opening groove is formed in the lug, a transfer convex portion is arranged on the periphery of the opening groove, the rotating ring is rotationally connected with the transfer convex portion, the rotating axis is consistent with the axial center line of the screw rod, the rotating ring is a non-closed ring with a fracture, the rotating cover is fixedly connected with the rotating ring, the screw rod penetrates through the opening groove and the rotating cover, and the rotating cover wraps the nut to drive the nut to rotate.

5. The flow rate calculation control structure according to claim 4, wherein a fixed column is provided on the rotary ring, and a fixed hole matching the fixed column is provided on the rotary cover.

6. The flow rate calculation control structure according to claim 3, wherein the end portion of the first connection plate is provided with a snap-in post, and the link assembly further comprises a screw, a nut, and a spring;

the screw rod is characterized in that a connecting hole for being clamped with the clamping column is formed in the screw rod head of the screw rod, the spring is sleeved on the screw rod, the screw rod penetrates through the lug, the nut is in threaded connection with the screw rod, and the nut and the spring are respectively located on two sides of the lug.