CN108132081A - An embedded mobile tiny liquid flow calibration device - Google Patents

Abstract

The invention discloses an embedded mobile micro liquid flow calibration device, which consists of a cart, a first weighing container device, a second weighing container device, a water separator, a commutator, a timer and a first pipe section, wherein the input end of the first pipe section is connected with a first detection branch or/and a second detection branch or/and a third detection branch through a universal joint, and the requirements of various environments and various types of liquid flow meters for calibration/calibration are realized by utilizing detected flow meters connected on different detection branches through meter clamping devices, and the embedded mobile micro liquid flow calibration device has the advantages that: the movable liquid flow calibration device has the advantages that the movable liquid flow calibration device can move, the operation platform can be lifted, the requirement of field calibration can be met, the calibration capability of the large-caliber liquid flow standard device in a small flow range is expanded, the requirements of various liquid flow meter calibration/calibration in various directions and types can be met, the disassembly and the assembly are convenient, the weighing equipment can be selected according to the requirement, the calibration/calibration work efficiency is improved, and the timing mode is more accurate and reliable.

Description

An embedded mobile tiny liquid flow calibration device

technical field

The invention relates to the field of metering and calibration, in particular to an embedded mobile tiny liquid flow calibration device.

Background technique

At present, domestic provincial and municipal metering technical institutions pay great attention to the development of "large-caliber, large-flow" liquid flow calibration devices, but pay little attention to the research on small-flow and micro-flow measurement, which makes the research and development of small-flow metering devices comparatively difficult. weak. The main problems:

1) The measurement range of domestic large-caliber liquid flow devices cannot meet the measurement requirements of small flow and micro flow, and the accuracy of small flow verification or calibration is also low;

2) Most of the existing domestic flow devices are large and difficult to move. The detection method adopted is mainly to disassemble the flow meter and send it for inspection, which cannot realize on-site calibration. In addition to consumption, removing the watch and then submitting it for inspection will affect the production of the enterprise;

3) Professional liquid flow standard devices for the flow rate of the metering system usually have a caliber of DN25mm or more, and the caliber of DN20mm and DN15mm is tested in the form of changing pipes (due to the small diameter of the pipe section, it is not easy to lay a fixed pipe section), and there is almost no ability to detect below the caliber of DN10mm , in addition to being equipped with a small electronic scale, the connection of the pipe section is also inconvenient, especially the flowmeter with a caliber below DN25mm mostly uses threaded joints, and the pipe section connection on the device is a flange connection, which will make the flowmeter, The inner diameter of the pipe section is not concentric, and the flow field will be distorted when the fluid flows through, which cannot correctly reflect the measurement performance of the flowmeter, resulting in misjudgment of the verification results;

4) At present, when calibrating micro flowmeters on site in China, due to the limitation of the site environment, the weighing method is mostly used, which is carried out by pinching a stopwatch and reading electronic scales. Although this method connects and disassembles pipelines and standard equipment It is more convenient to carry and install, but it is difficult to eliminate human errors, and the rough operation of human factors introduces many uncontrollable errors.

Contents of the invention

The purpose of the present invention is to provide an embedded tiny liquid flow standard device to solve the problems in the background technology.

In order to achieve the above object, the technical scheme that the present invention takes is:

An embedded mobile tiny liquid flow calibration device, comprising a trolley, a first weighing capacity device, a second weighing capacity device, a water distributor, a commutator, a timer and a first pipe section, the first weighing capacity Both the container device and the second weighing container device are arranged on the trolley, the timer is arranged on the commutator, and the water separator is located at the first weighing container device and the second weighing container device. Above the container device, the commutator is located above the water separator, the water inlet of the water separator is connected to the output end of the commutator, and the two water outlets of the water separator are respectively connected to the first A weighing capacity device corresponds to a second weighing capacity device, the input end of the commutator is connected to the output end of the first pipe section, and the input end of the first pipe section is connected to the first detection branch or/and the second The second detection branch or/and the third detection branch.

In the above scheme, the cart includes a telescopic armrest, a support frame, a support platform and four rollers, the telescopic armrest is arranged at one end of the support platform, and the four rollers are arranged symmetrically on the bottom of the support platform. On both sides, the support frame is arranged on the top of the support platform and close to one end of the telescopic handrail, one end of the support frame is connected to the top of the support platform, and the other end is connected to the first pipe section;

The first weighing container device includes a first weighing container, a first electronic scale and a first lifting bracket, the first weighing container is movably arranged on the first electronic scale, and the first electronic scale The scale is supported on the support platform of the trolley through the first fixed block, the first lifting bracket is located directly below the first weighing container, and one end of the first lifting bracket is connected to the The supporting platform of the trolley is connected, and the other end is in active contact with the bottom of the first weighing container;

The second weighing capacity device comprises a second weighing container, a second electronic scale and a second lifting bracket, the second weighing container is movably arranged on the second electronic scale, and the second electronic scale The scale is supported on the support platform of the trolley through the second fixed block, the second lifting bracket is located directly below the second weighing container, and the second lifting bracket is connected to the trolley The supporting platform is connected, and the other end is in active contact with the bottom of the second weighing container;

A drain valve is also connected to the lower parts of the first weighing container and the second weighing container.

In the above solution, a level is also provided on the first fixed block and the second fixed block, the first electronic scale is movably connected to the first fixed block, and the second electronic scale is connected to the second fixed block. The fixed block is movably connected, and both the first fixed block and the second fixed block are fixedly connected with the support platform.

In the above scheme, a first winch and a second winch are also arranged on one side of the support platform, the first winch is connected to the first lifting bracket, and the second winch is connected to the second lifting bracket. Lift bracket connection.

In the above solution, the first electromagnetic coil and the second electromagnetic coil are respectively connected to the left and right ends of the commutator, and the nozzle is also connected to the upper end of the commutator.

In the above solution, the first detection branch includes a large flow standard device, a first universal joint, a first meter clamp, a horizontally installed flowmeter to be tested, a second meter clamp and a second meter clamp connected sequentially along the direction of water flow. Two universal joints, the large flow standard device is connected to the first universal joint, the first universal joint is connected to the first meter holder through the second pipe section, the connection between the second meter holder and the second universal joint The space is connected through the third pipe section and the first replacement pipe section, the second universal joint is connected with the first pipe section, and the two ends of the horizontally installed flowmeter to be tested are respectively connected with the first meter holder and the second Meter connection;

The second detection branch includes a large flow standard device connected sequentially along the water flow direction, a first universal joint, a third universal joint, a third meter clip, a vertically installed flowmeter to be tested, a fourth meter clip and The fourth universal joint, the large flow standard device is connected to the first universal joint, the first universal joint is connected to the third universal joint through the second pipe section, the second replacement pipe section and the third pipe section, the The third universal joint is connected with the third meter holder, and the two ends of the vertically installed flowmeter to be checked are respectively connected with the third meter holder and the fourth meter holder, and the fourth meter holder is passed through the first meter holder. Four universal joints are connected with the first pipe section;

The third detection branch includes an on-site flow source, an on-site flow meter, a fifth meter clip and a fifth universal joint connected in sequence along the water flow direction, the on-site flow source is connected to the on-site flow meter, and the on-site The flow meter is connected to the fifth meter clamp, the fifth meter clamp is connected to the fifth universal joint, and the fifth universal joint and the first pipe section pass through the third pipe section and the first replacement Pipe sections are connected, and a second exhaust pipe is also connected to the fifth universal joint.

In the above solution, throttle valves and pressure gauges are provided on the second pipe sections, and a first exhaust pipe is also connected to the first universal joint.

In the above solution, a first branch and a second branch are also connected between the third pipe section and the first pipe section, and the third pipe section is also provided with the first branch and the second branch respectively. The first on-off valve and the second on-off valve corresponding to the branch, and the third on-off valve and the fourth on-off valve respectively corresponding to the first and second branches are provided on the first pipe section.

In the above solution, the first universal joint, the second universal joint, the third universal joint and the fourth universal joint are all two-way joints with a cylindrical cavity in the middle, and one end of the two-way joints is centrally connected There is a straight pipe section of Φ25, and the other end of the two-way connectable joint is connected with straight pipe sections of Φ15, Φ10, Φ8, Φ6 and Φ4.

In the above scheme, the first meter clip, the second meter clip, the third meter clip and the fourth meter clip all include ordinary pipe section flanges, standard straight pipe sections, positioning screws, claw drive mechanisms, clips disc and movable claws, the flange of the ordinary pipe section is set at one end of the standard straight pipe section, the chuck is set at the other end of the standard straight pipe section, and the claw drive mechanism and movable claws are respectively set at the The two ends of the disk, and the claw drive mechanism is movably sleeved on the standard straight pipe section, one end of the movable claw passes through the chuck and is connected to one end of the claw drive mechanism, and the other end of the movable claw One end is used to connect with the flowmeter to be tested, the positioning screw is passed through the other end of the claw driving mechanism, and the claw driving mechanism is fixedly connected to the standard straight pipe section through the positioning screw.

Compared with prior art, the beneficial effect of the present invention is:

1) This device is equipped with a universal joint, which can be embedded in a liquid large flow standard device, extending the measurement range of the large flow device at small flow, improving the calibration accuracy of small flow and micro flow, and can also connect various pipe sections for on-site detection/calibration , flow meter, convenient for the implementation of on-site testing/calibration;

2) This device is movable, and can be directly connected to the pipe section where the flow meter to be tested is located through a universal joint to perform small flow and micro flow calibration on site, and the operating platform can be lifted up and down, and the height of the measuring instrument can be adjusted to meet various heights of equipment on site need;

3) This device is equipped with horizontal and vertical interfaces and clamping devices. The clamping device can clamp the threaded pipe joints of different thicknesses, and ensure the verticality, levelness and concentricity of the inner diameter of the pipe section. It can verify and calibrate the rotameter, turbine Flowmeter, mass flowmeter and other flowmeters;

4) This device is equipped with a commutator, a timer and two sets of weighing systems, which can realize automatic detection and get rid of the previous detection method of pinching the stopwatch. The two sets of weighing systems are independent of each other, and the weighing container can be flexibly selected through the commutator The use of the device improves the detection efficiency, and the measuring device is separated from the weighing instrument during the detection process, so as to avoid the vibration of the water discharge process from damaging the accuracy of the weighing container and play a protective role.

Description of drawings

Figure 1 is a diagram of the first application embodiment of the embedded mobile tiny liquid flow calibration device of the present invention;

Fig. 2 is a schematic diagram of the connection between the trolley and the weighing capacity device in the embedded mobile tiny liquid flow calibration device of the present invention;

Fig. 3 is a schematic structural view of the commutator in the embedded mobile tiny liquid flow calibrating device of the present invention;

Fig. 4 is a three-dimensional structural schematic diagram of the universal joint in the embedded mobile tiny liquid flow calibration device of the present invention;

Fig. 5 is a schematic diagram of the connection between the meter holder and the measured flowmeter in the embedded mobile tiny liquid flow calibration device of the present invention;

Fig. 6 is a diagram of the second application embodiment of the embedded mobile tiny liquid flow calibration device of the present invention;

Fig. 7 is a diagram of a third application embodiment of the embedded mobile tiny liquid flow calibration device of the present invention;

In the figure: 1, trolley; 1-1, telescopic armrest; 1-2, support frame; 1-3, support platform; 1-4, roller; 2, first weighing capacity device; 3, second scale Heavy capacity device; 4. Water separator; 5. Reverser; 6. Timer; 7. First pipe section; 8. Large flow standard device; 9. Second pipe section; 10. Third pipe section; 11. First Replacement pipe section; 12. The second replacement pipe section; 13. Throttle valve; 14. Pressure gauge; 15. The first exhaust pipe; 21. The first weighing container; 22. The first electronic scale; 23. The first lift Bracket; 24, the first fixed block; 25, drain valve; 26, the first winch; 27, the second winch; 31, the second weighing container; 32, the second electronic scale; 33, the second lifting bracket 34. The second fixed block; 51. The first electromagnetic coil; 52. The second electromagnetic coil; 53. The nozzle; 100. The first detection branch; 101. The first universal joint; 1. The tested flowmeter installed horizontally; 104. The second clamper; 105. The second universal joint; 200. The second detection branch; 201. The third universal joint; 202. The third clamper; 203. Vertical The installed flowmeter; 204, the fourth meter clip; 205, the fourth universal joint; 300, the third detection branch; 301, the field flow source; 302, the field flowmeter; 303, the fifth meter clip; 304, the fifth universal joint; 305, the second exhaust pipe; 400, the first branch; 401, the first switching valve; 402, the third switching valve; 500, the second branch; 501, the second switching valve; 502, the fourth switching valve; 101a, the straight pipe section of φ25; 101b, the straight pipe section of φ15; 101c, the straight pipe section of φ10; 101e, the straight pipe section of φ8; 101f, the branch pipe section of φ6; , ordinary pipe flange; 102b, standard straight pipe section; 102c, positioning screw; 102d, jaw driving mechanism; 102e, chuck; 102f, movable jaw;

"→" in the figure indicates the direction of water flow.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following will further explain how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.

As shown in Figures 1 and 2, an embedded micro-flow calibration device provided by the present invention includes a trolley 1, a first weighing capacity device 2, a second weighing capacity device 3, a water separator 4, and a commutator 5. The timer 6 and the first pipe section 7, the first weighing capacity device 2 and the second weighing capacity device 3 are all set on the trolley 1, the timer 6 is set on the commutator 5, and the water separator 4 is located on Above the first weighing capacity device 2 and the second weighing capacity device 3, the commutator 5 is located above the water separator 4, the water inlet of the water separator 4 is connected to the output end of the commutator 5, and the two ends of the water separator 4 Two water outlets correspond to the first weighing capacity device 2 and the second weighing capacity device 3 respectively, and the input end of the commutator 5 is connected with the output end of the first pipe section 7, as shown in Fig. 1, Fig. 6 and Fig. 7, The input end of the first pipe section 7 is connected with the first detection branch 100 or/and the second detection branch 200 or/and the third detection branch 300 .

Wherein, as shown in Figure 2, cart 1 comprises telescopic armrest 1-1, support frame 1-2, support platform 1-3 and four rollers 1-4, and telescopic type armrest 1-1 is arranged on support platform 1- 3 at one end, four rollers 1-4 are symmetrically arranged on both sides of the bottom of the support platform 1-3, the support frame 1-2 is arranged on the top of the support platform 1-3 and is close to one end of the telescopic handrail 1-1, the support frame 1- 2. One end is connected to the top of the support platform 1-3, and the other end is connected to the first pipe section 7;

Wherein, the first weighing capacity device 2 comprises a first weighing container 21, a first electronic scale 22 and a first lifting bracket 23, the first weighing container 21 is movably arranged on the first electronic scale 22, and the first electronic scale The scale 22 is supported on the supporting platform 1-3 of the cart 1 by the first fixed block 24, the first lifting bracket 23 is located directly below the first weighing container 21, and one end of the first lifting bracket 23 is connected to the push cart 1. The support platform 1-3 of the car 1 is connected, and the other end is in movable contact with the bottom of the first weighing container 21;

Wherein, the second weighing capacity device 3 comprises a second weighing container 31, a second electronic scale 32 and a second lifting bracket 33, the second weighing container 31 is movably arranged on the second electronic scale 32, and the second electronic scale The scale 32 is supported on the supporting platform 1-3 of the cart 1 by the second fixed block 34, the second lifting bracket 33 is located directly below the second weighing container 31, and the second lifting bracket 33 is connected to the cart 1. The supporting platform 1-3 is connected, and the other end is in active contact with the bottom of the second weighing container 31;

Wherein, a drain valve 25 is also connected to the lower parts of the first weighing container 21 and the second weighing container 31 .

Wherein, a level is also provided on the first fixed block 24 and the second fixed block 34, the first electronic scale 22 is movably connected with the first fixed block 24, the second electronic scale 32 is movably connected with the second fixed block 34, and the second electronic scale 32 is movably connected with the second fixed block 34. Both the first fixed block 24 and the second fixed block 34 are fixedly connected with the supporting platform 1-3.

Wherein, a first winch 26 and a second winch 27 are also arranged on one side of the supporting platform 1-3, the first winch 26 is connected with the first lifting bracket 23, the second winch 27 is connected with the second lifting bracket 33 connect.

As shown in Fig. 3, the left and right ends of the commutator 5 are respectively connected with a first electromagnetic coil 51 and a second electromagnetic coil 52, and the upper end of the commutator 5 is also connected with a nozzle 53 correspondingly.

Embodiment 1: As shown in FIG. 1, in this embodiment, the first detection branch 100 includes a large flow standard device 8, a first universal joint 101, a first meter clamp 102, a horizontal The installed flow meter 103, the second meter holder 104 and the second universal joint 105, the large flow standard device 8 is connected with the first universal joint 101, and the first universal joint 101 and the first meter holder 102 are passed through the first universal joint 102 The second pipe section 9 is connected, the second clamp 104 and the second universal joint 105 are connected through the third pipe section 10 and the first replacement pipe section 11, the second universal joint 105 is connected with the first pipe section 7, and the measured flow rate of the horizontal installation The two ends of the meter 103 are respectively connected with the first meter holder 102 and the second meter holder 104;

Embodiment 2: As shown in FIG. 6, in this embodiment, the second detection branch 200 includes a large flow standard device 8, a first universal joint 101, a third universal joint 201, a third Meter clip 202, vertically installed flowmeter 203 to be tested, fourth meter clip 204 and fourth universal joint 205, the large flow standard device 8 is connected to the first universal joint 101, and the first universal joint 101 passes through the second pipe section 9 1. The second replacement pipe section 12 and the third pipe section 10 are connected with the third universal joint 201, the third universal joint 201 is connected with the third clamp meter 202, and the two ends of the vertically installed flowmeter 203 to be tested are respectively connected with the third clamp meter The device 202 and the fourth clamp 204 are connected, and the fourth clamp 204 is connected to the first pipe section 7 through the fourth universal joint 205;

Embodiment 3: As shown in FIG. 7, in this embodiment, the third detection branch 300 includes an on-site flow source 301, an on-site flow meter 302, a fifth clamp 303 and a fifth universal meter connected sequentially along the direction of water flow. Joint 304, on-site flow source 301 is connected to on-site flow meter 302, on-site flow meter 302 is connected to the fifth meter clamp 303, the fifth meter clamp 303 is connected to the fifth universal joint 304, and the fifth universal joint 304 is connected to the first pipe section 7 are connected through the third pipe section 10 and the first replacement pipe section 11, and the second exhaust pipe 305 is also connected to the fifth universal joint 304.

As shown in FIG. 1 and FIG. 6 , a throttle valve 13 and a pressure gauge 14 are provided on the second pipe section 9 , and a first exhaust pipe 15 is also connected to the first universal joint 101 .

As shown in Figure 1, Figure 6 and Figure 7, a first branch 400 and a second branch 500 are also connected between the third pipe section 10 and the first pipe section 7, and the third pipe section 10 is also provided with The first on-off valve 401 and the second on-off valve 501 corresponding to the first branch 400 and the second branch 500 are also provided on the first pipe section 7 corresponding to the first branch 400 and the second branch 500 respectively. Three switch valves 402 and a fourth switch valve 502 .

As shown in Fig. 4, the first universal joint 101, the second universal joint 105, the third universal joint 201, the fourth universal joint 205 and the fifth universal joint 304 are all bidirectional joints with a cylindrical cavity in the middle, A straight pipe section 101a of Φ25 is connected to the center of one end of the bidirectional joint, and straight pipe sections (101b, 101c, 101e, 101f and 101g) of Φ15, Φ10, Φ8, Φ6 and Φ4 are connected to the other end of the bidirectional joint.

As shown in Figure 5, the first meter clip 102, the second meter clip 104, the third meter clip 202, the fourth meter clip 204 and the fifth meter clip 303 all include ordinary pipe section flanges 102a, standard Straight pipe section 102b, positioning screw 102c, jaw driving mechanism 102d, chuck 102e and movable jaw 102f, ordinary pipe flange 102a is set at one end of standard straight pipe section 102b, chuck 102e is set at the other end of standard straight pipe section 102b, and the jaws The driving mechanism 102d and the movable jaw 102f are respectively arranged at both ends of the chuck 102e, and the jaw driving mechanism 102d is movably sleeved on the standard straight pipe section 102b, and one end of the movable jaw 102f passes through the chuck 102e and is connected to one end of the jaw driving mechanism 102d The other end of the movable claw 102f is used to connect with the flowmeter to be tested, the positioning screw 102c is passed through the other end of the claw driving mechanism 102d, and the claw driving mechanism 102d is fixedly connected to the standard straight pipe section 102b through the positioning screw 102c.

In the above three embodiments, the weighing capacity of the first electronic scale 22 is 35 kg, the weighing capacity of the second electronic scale 32 is 3 kg, and the accuracy levels of the first electronic scale 22 and the second electronic scale 32 are both 0.01%.

The above-mentioned example 1 and example 2 are suitable for expanding the small flow and small flow detection capabilities of the large flow standard device in the laboratory environment; embodiment 3 is suitable for on-site detection.

The specific operation process of an embedded mobile tiny liquid flow calibration device provided by the present invention is as follows:

Embodiment 1: As shown in Figure 1, taking the first detection branch 100 as an example, when carrying out the verification/calibration of the small liquid flow in the laboratory, it is first connected with the liquid flow standard device 8 through the first universal joint 101, and the The tested flowmeter 103 installed horizontally is fixed by the first meter clip 102 and the third meter clip 104, clamped into the pipe section, and the distance between the first ten and the last five straight pipe sections is ensured. The tested flowmeter 103 to be installed horizontally is installed After good, rotate the first capstan 26 and the second capstan 27, raise the first weighing container 21 and the second weighing container 31, the first weighing container 21 is separated from the first electronic scale 22, and the second weighing container 31 is separated from the second electronic scale 32, then close the throttle valve 13, and open the first on-off valve 401, the second on-off valve 501, the third on-off valve 402, the fourth on-off valve 502 and the second weighing container 31 in sequence. Drain valve 25, and switch the commutator 5 to the side of the second weighing container 31, completely close the nozzles of the first branch pipe 400 and the second branch pipe 500, then open the first exhaust pipe 15, and start the liquid flow standard device 8. Open the throttle valve 13 to ventilate, and adjust to the measured flow point. After the exhaust is about 30 seconds and stabilized, switch the commutator 5 back to the side of the first weighing container 21 (the first weighing container The drain valve 25 on the container is closed), the timer 6 starts counting, and when the water volume reaches the verification water consumption (or meets the single verification duration), the commutator 5 is switched back to the second weighing container 31 side, and the timing The timer 6 finishes timing, and finally closes the throttle valve 13, rotates the first capstan 26, falls back the first lifting bracket 23, makes the first weighing container fall back to the first electronic scale 22, and weighs the weight in the first weighing container 21. water quality, complete a check.

When verifying a smaller flow point, a smaller second weighing container 31 can be used to perform the above operation.

Embodiment 2: As shown in Figure 6, taking the second detection branch 200 as an example, when verifying the flow meter in the vertical direction, on the basis of Embodiment 1, the first replacement pipe section 11 in Embodiment 1 is removed and replaced On the vertically installed tested flowmeter 203, remove the horizontally installed tested flowmeter 103 and replace it with the second replacement pipe section 12, simultaneously close the first branch pipe 400 and the second branch pipe 500, and open the first on-off valve 401, the second branch pipe The second on-off valve 501, the third on-off valve 402 and the fourth on-off valve 502 are verified. For example, by closing the first branch pipe 400 and opening the second branch pipe 500, the second branch pipe 500 can be used for verification. By closing the second branch pipe 500 and opening the first branch pipe 400, the verification of the first branch pipe 400 can be carried out.

Embodiment 3: as shown in Figure 7, it is the third detection branch 300 (for on-site detection), which mainly utilizes the fifth universal joint 304 and the fifth meter holder 303 to be connected with the on-site flowmeter 302, through the on-site flow The meter 302 is connected to the on-site flow source 301 for on-site flow detection.

The working principle of an embedded mobile tiny liquid flow calibration device provided by the present invention is as follows:

Use the switching function of the commutator to switch the corresponding solution to be detected to the side of the corresponding weighing container, and use the timer to count the time. During this process, the bracket of the weighing container lifts the weighing container, so that The weighing container is separated from the electronic scale. When the amount of water to be measured reaches the weighing limit, switch the commutator to the other weighing container side, stop the timer, and use the bracket to fill the weighing container with water. Lightly put it on the electronic scale and weigh it, so that the weighing mass m and t can be obtained, and the mass flow Qm and volume flow can be obtained by calculation:

The calculation formula of mass flow Qm is as follows:

The formula for calculating volume flow is as follows:

(where ρ is the density of the medium)

During the detection process, by reading the indication value Qi of the flowmeter under inspection, the relative error of the single point of the flowmeter under inspection can be calculated, and the calculation formula is as follows:

or

The present invention can be used in two kinds of detection environments, i.e. laboratory environment and field environment:

When it is a laboratory environment, it is equipped with a large-flow standard device to expand the small-flow and micro-flow detection capabilities of the large-flow standard device. The first universal joint is used to connect with the DN25 pipe section flange of the large-flow standard device, and the throttling valve Auxiliary control flow. In the laboratory environment, when the flowmeter to be tested is a horizontally installed flowmeter, such as the first detection branch, use a four-claw retractable meter clip to clamp the flowmeter into the pipe section, and connect the weighing system with the second universal joint. Connection; when the flowmeter to be tested is a vertically installed flowmeter, such as a float flowmeter, such as the second detection branch, the water flows through the flowmeter and enters the weighing system directly through the commutator.

When it is an on-site detection environment, such as the third detection branch, use the fifth universal joint, the fifth meter clip and the on-site flow meter to connect to the on-site flow source for detection.

Finally, it is stated that the above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present invention in the same way.

Claims (10)

1. An embedded mobile tiny liquid flow calibration device, characterized in that it comprises a trolley (1), a first weighing capacity device (2), a second weighing capacity device (3), and a water separator (4) , a commutator (5), a timer (6) and a first pipe section (7), and the first weighing capacity device (2) and the second weighing capacity device (3) are all arranged on the cart ( 1), the timer (6) is set on the commutator (5), and the water separator (4) is located in the first weighing capacity device (2) and the second weighing capacity device (3), the commutator (5) is located above the water separator (4), the water inlet of the water separator (4) is connected to the output end of the commutator (5), and the The two water outlets of the water separator (4) correspond to the first weighing capacity device (2) and the second weighing capacity device (3) respectively, and the input end of the commutator (5) is connected to the The output end of the first pipe section (7) is connected, and the input end of the first pipe section (7) is connected with the first detection branch (100) or/and the second detection branch (200) or/and the third detection branch ( 300). 2. The embedded mobile tiny liquid flow calibrating device according to claim 1, characterized in that: the trolley (1) includes a telescopic armrest (1-1), a support frame (1-2), a support table ( 1-3) and four rollers (1-4), the telescopic armrest (1-1) is arranged at one end of the support platform (1-3), and the four rollers (1-4) are symmetrically arranged on On both sides of the bottom of the support platform (1-3), the support frame (1-2) is arranged on the top of the support platform (1-3) and close to one end of the telescopic armrest (1-1), One end of the support frame (1-2) is connected to the top of the support platform (1-3), and the other end is connected to the first pipe section (7); The first weighing container device (2) includes a first weighing container (21), a first electronic scale (22) and a first lifting bracket (23), and the first weighing container (21) is movable It is arranged on the first electronic scale (22), and the first electronic scale (22) is supported on the supporting platform (1-3) of the trolley (1) through the first fixed block (24), so The first lifting bracket (23) is located directly below the first weighing container (21), and one end of the first lifting bracket (23) is connected to the supporting platform ( 1-3) connection, the other end is in active contact with the bottom of the first weighing container (21); The second weighing capacity device (3) comprises a second weighing container (31), a second electronic scale (32) and a second lifting bracket (33), and the second weighing container (31) is movable Set on the second electronic balance (32), the second electronic balance (32) is supported on the support platform (1-3) of the cart (1) through the second fixed block (34), so The second lifting bracket (33) is located directly below the second weighing container (31), and the second lifting bracket (33) is connected to the support platform (1- 3) connected, the other end is in active contact with the bottom of the second weighing container (31); A drain valve (25) is also connected to the lower parts of the first weighing container (21) and the second weighing container (31). 3. The embedded mobile tiny liquid flow calibration device according to claim 2, characterized in that: a level is also provided on the first fixed block (24) and the second fixed block (34), and the first An electronic scale (22) is movably connected with the first fixed block (24), the second electronic scale (32) is movably connected with the second fixed block (34), and the first fixed block (24) and the second fixing block (34) are fixedly connected with the support platform (1-3). 4. The embedded mobile tiny liquid flow calibration device according to claim 2, characterized in that: a first winch (26) and a second winch (27) are also arranged on one side of the support platform (1-3) ), the first winch (26) is connected to the first lifting bracket (23), and the second winch (27) is connected to the second lifting bracket (33). 5. The embedded mobile tiny liquid flow calibration device according to claim 1, characterized in that: the first electromagnetic coil (51) and the second electromagnetic coil (51) are respectively connected to the left and right ends of the commutator (5). The electromagnetic coil (52) is also correspondingly connected with a nozzle (53) at the upper end of the commutator (5). 6. The embedded mobile tiny liquid flow calibration device according to claim 1, characterized in that, the first detection branch (100) includes a large flow standard device (8) sequentially connected along the direction of water flow, a first Universal joint (101), first meter clamp (102), horizontally installed flow meter (103), second meter clamp (104) and second universal joint (105), the large flow standard device ( 8) Connect with the first universal joint (101), the first universal joint (101) is connected with the first meter holder (102) through the second pipe section (9), and the second meter holder (104 ) and the second universal joint (105) are connected through the third pipe section (10) and the first replacement pipe section (11), the second universal joint (105) is connected with the first pipe section (7), the The two ends of the tested flowmeter (103) installed horizontally are respectively connected with the first meter holder (102) and the second meter holder (104); The second detection branch (200) includes a large flow standard device (8), a first universal joint (101), a third universal joint (201), and a third meter clip (202) connected in sequence along the water flow direction , a vertically installed flowmeter to be tested (203), a fourth clamp (204) and a fourth universal joint (205), the large flow standard device (8) is connected to the first universal joint (101), The first universal joint (101) is connected to the third universal joint (201) through the second pipe section (9), the second replacement pipe section (12) and the third pipe section (10), and the third universal joint ( 201) is connected to the third meter holder (202), and the two ends of the vertically installed flowmeter (203) to be tested are respectively connected to the third meter holder (202) and the fourth meter holder (204) , the fourth clamp (204) is connected to the first pipe section (7) through a fourth universal joint (205); The third detection branch (300) includes an on-site flow source (301), an on-site flow meter (302), a fifth meter clamp (303) and a fifth universal joint (304) connected sequentially along the water flow direction, so The on-site flow source (301) is connected with the on-site flow meter (302), the on-site flow meter (302) is connected with the fifth meter clamp (303), and the fifth meter clamp (303) is connected with the The fifth universal joint (304) is connected, and the fifth universal joint (304) is connected to the first pipe section (7) through the third pipe section (10) and the first replacement pipe section (11). A second exhaust pipe (305) is also connected to the fifth universal joint (304). 7. The embedded mobile micro-liquid flow calibrating device according to claim 6, characterized in that, a throttle valve (13) and a pressure gauge (14) are all provided on the second pipe section (9). The first exhaust pipe (15) is also connected to the first universal joint (101). 8. The embedded mobile tiny liquid flow calibration device according to claim 6, characterized in that a first branch ( 400) and the second branch (500), the first switch valve (401) corresponding to the first branch (400) and the second branch (500) is also provided on the third pipe section (10) And the second on-off valve (501), the third on-off valve (402) and the second on-off valve (402) corresponding to the first branch (400) and the second branch (500) are also provided on the first pipe section (7). Four switching valves (502). 9. The embedded mobile tiny liquid flow calibration device according to claim 6, characterized in that, the first universal joint (101), the second universal joint (105), the third universal joint (201), the fourth The universal joint (205) and the fifth universal joint (304) are two-way joints with a cylindrical cavity in the middle, and a straight pipe section (101a) of Φ25 is connected to the center of one end of the two-way joint. The other end of the connectable joint is connected with straight pipe sections (101b, 101c, 101e, 101f and 101g) of Φ15, Φ10, Φ8, Φ6 and Φ4. 10. The embedded mobile tiny liquid flow calibration device according to claim 6, characterized in that: the first meter holder (102), the second meter holder (104), and the third meter holder (202) , the fourth clamping device (204) and the fifth clamping device (303) all include ordinary pipe section flange (102a), standard straight pipe section (102b), set screw (102c), claw driving mechanism (102d), chuck (102e) and movable jaws (102f), the common pipe section flange (102a) is set at one end of the standard straight pipe section (102b), and the chuck (102e) is set at the standard straight pipe section (102b ) at the other end, the jaw driving mechanism (102d) and movable jaws (102f) are respectively arranged at both ends of the chuck (102e), and the jaw driving mechanism (102d) is movably sleeved on the standard straight On the pipe section (102b), one end of the movable jaw (102f) passes through the chuck (102e) and is connected to one end of the jaw driving mechanism (102d), and the other end of the movable jaw (102f) is used for The flowmeter to be tested is connected, the positioning screw (102c) is installed on the other end of the claw driving mechanism (102d), and the claw driving mechanism (102d) is connected to the standard through the positioning screw (102c) The straight pipe section (102b) is fixedly connected.