High-stability flowmeter testing device and method

Abstract

The invention discloses a high-stability flowmeter testing device and method, and belongs to the technical field of flowmeter test.The high-stability flowmeter testing device comprises a rack and a positioning assembly, a workbench is fixed to the middle of the front end of the rack, a control panel is arranged in the center of the top of the workbench, and a driving assembly is arranged at the upper end of the rack; the positioning assemblies are arranged at the two ends of the top of the workbench, and each positioning assembly comprises a lower connecting base, a damper, a supporting spring, a supporting ring, a flowmeter to be measured and an upper connecting base. When a flowmeter is tested, the pressing plate drives the upper connecting base to move upwards, then the flowmeter to be tested is arranged above the lower connecting base, the supporting ring supports the bottom of the flowmeter to be tested at the moment, the situation that when the upper connecting base moves downwards, the upper portion of the flowmeter to be tested inclines, and consequently the butt joint effect is affected is avoided, and the damper can restrain vibration of the supporting spring; the flow meter to be measured is prevented from bouncing off due to vibration after being placed on the supporting ring.

Description

Technical Field

[0001] The present invention relates to the technical field of flowmeter testing, and specifically provides a flowmeter testing device and method with high stability. Background Art

[0002] A flowmeter is an instrument that indicates the measured flow rate and the total amount of fluid within a selected time interval. Simply put, it is an instrument used to measure the fluid flow rate in a pipeline or open channel. Flowmeters are further divided into differential pressure flowmeters, rotor flowmeters, throttling flowmeters, slit flowmeters, volumetric flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, etc. Classified by medium, they are liquid flowmeters and gas flowmeters. During the production process of flowmeters, a testing device is required to test whether the flowmeter samples are qualified.

[0003] For example, the patent with the publication number CN217716587U discloses a liquid mass flowmeter testing device. This patent controls the pressure stability of the nitrogen inlet through a ball valve to ensure that the test liquid flows steadily through the liquid mass flowmeter to be tested. Finally, it is weighed by a high-precision electronic balance and transmitted to the upper industrial control computer through a 485 communication method, with high detection accuracy; the test liquid only flows from the liquid tank through the liquid mass flowmeter to the liquid collection tank, and the test path is short, so the detection rate is high. However, this type of testing device usually uses flanges to connect the two ends of the flowmeter to the pipeline, and there are also many bolts on the flanges. When the number of flowmeters to be tested is large, frequent disassembly and replacement are required, and multiple disassembly and assembly operations will affect the stability of the connection.

[0004] Therefore, in view of the existing structure and deficiencies, research and improvement are carried out to propose a flowmeter testing device and method with high stability. Summary of the Invention

[0005] The purpose of the present invention is to provide a flowmeter testing device and method with high stability to solve the problem that when the number of flowmeters to be tested is large, frequent disassembly and replacement are required, and multiple disassembly and assembly operations will affect the stability of the connection as mentioned in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions: A flowmeter testing device and method with high stability, including a frame and a positioning component. In the middle of the front end of the frame, a workbench is fixed, and a control panel is arranged at the center of the top of the workbench. A driving component is arranged at the upper end of the frame. The positioning component is arranged at both ends of the top of the workbench. The positioning component includes a lower connecting seat, a damper, a support spring, a support ring, a flowmeter to be tested, and an upper connecting seat. Lower connecting seats are arranged at both ends of the top of the workbench, and the upper end of the lower connecting seat is in a frustum shape. A damper is arranged on the top of the workbench, a support spring is sleeved outside the damper, and the top of the support spring is connected with a support ring. The flowmeter to be tested is arranged on the top of the lower connecting seat, and an upper connecting seat is arranged at the top of the flowmeter to be tested.

[0007] Further, the driving component includes a motor, a gear, a rack, a driving plate, and a guide rod. The output shaft of the motor is connected with a gear, and racks are meshed on both sides of the gear. A driving plate is fixed on one side of the rack, and a guide rod is slidably connected inside the rear end of the driving plate, and the guide rod is fixedly connected with the frame.

[0008] Further, the driving component further includes a slide rod, a buffer spring, and a pressing plate. Slide rods are slidably connected inside both ends of the front part of the driving plate, a buffer spring is sleeved outside the slide rod, and a pressing plate is arranged at the bottom of the slide rod.

[0009] Further, a water tank is arranged at the front end of the lower part of the frame, a pump body is arranged on the top of the water tank, a first shunt pipe is connected to the top of the pump body, and the first shunt pipe is communicated with the lower connecting seat. A hose is fixedly connected to the center of the inside of the pressing plate, and the hose is communicated with the upper connecting seat. A second shunt pipe is connected to the top of the hose, and a flowmeter group is arranged at the end of the second shunt pipe, and the flowmeter group is communicated with the inside of the water tank.

[0010] Further, a switching component is arranged at the lower end of the rear part of the frame. The switching component includes a telescopic rod, a return spring, a driving frame, a sliding sleeve, and a driving rod. Telescopic rods are arranged at both ends of the rear side of the frame, a return spring is sleeved outside the upper end of the telescopic rod, the top of the return spring is connected with a driving frame, a sliding sleeve is rotatably connected to one side of the lower end of the driving frame, and a driving rod is slidably connected inside the sliding sleeve.

[0011] Further, the switching component further includes a rotating shaft, a throttling plate, and a sealing baffle. A rotating shaft is fixed to the end of the driving rod, throttling plates are fixed to the middle and rear ends of the rotating shaft, and sealing baffles are arranged on both sides of the outer end of the throttling plate.

[0012] Further, drainage components are arranged on both sides of the first shunt pipe. The drainage components include a return pipe, a guide groove, a T-shaped frame, a return spring, a sealing plug and a bent rod. Guide grooves are symmetrically formed in the inner sides of the upper ends of the return pipe, and a T-shaped frame is slidably connected inside the guide grooves. A return spring is sleeved outside the T-shaped frame, and a sealing plug is connected to the end of the T-shaped frame. And a bent rod is arranged on one side of the sealing plug.

[0013] Further, a ventilation component is arranged on the top of the second shunt pipe. The ventilation component includes an intake cylinder, a filter screen and a piston rod. The intake cylinder is fixed to the top of the second shunt pipe, filter screens are arranged on both sides of the upper end of the intake cylinder, and a piston rod is slidably connected inside the intake cylinder.

[0014] Further, the ventilation component further includes a compression spring, a top plate and a spring rod. A compression spring is sleeved outside the lower end of the piston rod, a top plate is arranged on the top of the piston rod, and spring rods are fixed to both ends of the bottom of the top plate.

[0015] Further, a high-stability flowmeter testing method is applied to the high-stability flowmeter testing device, and includes the following steps: S1: Place the flowmeter to be tested above the lower connecting seat. At this time, the supporting ring supports the bottom of the flowmeter to be tested, and the damper also suppresses the vibration of the supporting spring; S2: The motor drives the gear to rotate, so that the rack on one side moves downward. The driving plate slides on the guide rod and drives the pressing plate to move downward through the buffer spring, so that the upper connecting seat presses and fixes the flowmeter to be tested; S3: The rack moves downward to squeeze the corresponding driving frame on one side. At the same time, the telescopic rod limits and guides it. Then, the rotating shaft is driven to rotate through the sliding sleeve and the driving rod, so that the throttle plates inside the first shunt pipe and the second shunt pipe rotate to the vertical state. The upper end of the throttle plate also pushes the bent rod, so that the sealing plug fits with the through hole on the first shunt pipe. At the same time, the compression spring in the intake cylinder pushes the piston rod to seal the top of the second shunt pipe. Since the rack at the other end moves upward and does not squeeze the driving frame, the return spring on the same side pushes the driving frame under the limitation of the telescopic rod at this time, so that the throttle plate and the sealing baffle are closely attached to each other to prevent water flow through; S4: The pump body pumps the water in the water tank into the first shunt pipe, and then sequentially passes through the flowmeter to be tested, the hose, the second shunt pipe, and the flowmeter group and returns to the water tank. Observe the values of the flowmeter to be tested and the standard flowmeters in the flowmeter group to detect whether the flowmeter to be tested is qualified; S5: Place another flowmeter to be tested on another work station. When it is necessary to disassemble the flowmeter after the previous one has been tested, the motor drives the gear to rotate in the reverse direction, causing the rack on the same side to move upward. At this time, the throttle plate on the same side rotates to the horizontal position, and the return spring pushes the T-shaped frame, causing it to move in the guide groove, separating the sealing plug from the first shunt pipe. At the same time, when the driving plate moves upward, it also squeezes the spring rod, pulling the piston rod upward through the top plate, allowing external air to enter the intake cylinder through the filter screen to balance the air pressure above the second shunt pipe, enabling the water flow inside the flowmeter after testing to quickly drain into the water tank through the return pipe for recycling, facilitating the disassembly and replacement of the flowmeter to be tested;

[0016] The present invention provides a flowmeter testing device and method with high stability, having the following beneficial effects: 1. When testing the flowmeter of the present invention, the pressing plate drives the upper connecting seat to move upward, and then the flowmeter to be tested is placed above the lower connecting seat. At this time, the supporting ring supports the bottom of the flowmeter to be tested, preventing the upper connecting seat from moving downward and affecting the docking effect due to the upper part of the flowmeter to be tested being skewed. Moreover, the damper can also suppress the vibration of the supporting spring, preventing the flowmeter from falling off due to vibration after being placed on the supporting ring. And when the pressing plate drives the upper connecting seat to press down, since both the upper connecting seat and the lower connecting seat are in a hollow frustum shape and are made of rubber material, they can be inserted into the interior of the flowmeter to be tested and fit tightly with its end, thus improving the connection convenience while enhancing the overall sealing performance, making the test more stable. And the frustum-shaped connecting seat can also adapt to the flowmeter caliber within a certain range, thereby expanding the application range of the device.

[0017] 2. Since the two racks are located on both sides of the gear in the present invention, when the motor drives the gear to rotate, the movement paths of the two racks are opposite. And when the rack on one side moves upward, it drives the driving plate to slide on the guide rod, pulling the pressing plate through the sliding rod, separating the upper connecting seat from the flowmeter to be tested. Similarly, when the pressing plate on the other side moves downward, the upper connecting seat can press and fix the flowmeter to be tested. Thus, while testing one flowmeter to be tested, the staff can replace the flowmeter to be tested on another work station, improving the efficiency of detecting multiple flowmeters. And since the driving plate applies force to the pressing plate through the buffer spring, there is a certain buffer distance, avoiding the situation of jamming when the gear rotates.

[0018] 3. During the downward movement of the rack in the present invention, its bottom presses the corresponding side of the driving frame, and at the same time, the telescopic rod limits and guides it. Then, the sliding sleeve and the driving rod drive the rotating shaft to rotate, so that the throttle plates inside the first flow dividing pipe and the second flow dividing pipe rotate to the vertical state for the water flow to pass through. Since the rack at the other end moves upward and does not press the driving frame, the return spring then pushes the driving frame under the limitation of the telescopic rod, making the throttle plate fit tightly with the sealing baffle to prevent the water flow from flowing. Thus, during the positioning of the flowmeter, the liquid flow directions in the first flow dividing pipe and the second flow dividing pipe can be quickly and synchronously adjusted without adding an additional power source, thereby improving the convenience during subsequent tests.

[0019] 4. When the throttle plate rotates to the vertical state in the present invention, its upper end pushes the bent rod, causing the sealing plug to fit with the through hole on the first flow dividing pipe, thereby preventing the water flow from entering the return pipe. At the same time, the compression spring in the air inlet cylinder pushes the piston rod to seal the top of the second flow dividing pipe. At this time, the water flow can circulate inside one end of the first flow dividing pipe, the second flow dividing pipe, and the water tank. And when the rack moves upward and the throttle plate rotates to the horizontal state, the return spring then pushes the T-shaped frame to move it in the guiding groove, separating the sealing plug from the first flow dividing pipe. At the same time, when the driving plate moves upward, it also presses the spring rod, and then pulls the piston rod upward through the top plate, enabling the external air to enter the air inlet cylinder through the filter screen to balance the air pressure above the second flow dividing pipe, so that the water flow inside the flowmeter after detection can quickly drain into the water tank through the return pipe for recycling, preventing the problem of water spilling due to excessive internal water flow when disassembling the flowmeter to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall front view structural schematic diagram of a high-stability flowmeter testing device of the present invention; Figure 2 is the overall rear view structural schematic diagram of a high-stability flowmeter testing device of the present invention; Figure 3 is the three-dimensional structural schematic diagram of the driving plate of a high-stability flowmeter testing device of the present invention; Figure 4 is the three-dimensional structural schematic diagram of the supporting ring of a high-stability flowmeter testing device of the present invention; Figure 5 is the partial three-dimensional structural schematic diagram of the switching component of a high-stability flowmeter testing device of the present invention; Figure 6 is the front view sectional structural schematic diagram of the drainage component of a high-stability flowmeter testing device of the present invention; Figure 7 is the rear view sectional structural schematic diagram of the ventilation component of a high-stability flowmeter testing device of the present invention.

[0021] In the figure: 1, frame; 2, workbench; 3, control panel; 4, drive assembly; 401, motor; 402, gear; 403, rack; 404, drive plate; 405, guide rod; 406, slide bar; 407, buffer spring; 408, pressing plate; 5, positioning assembly; 501, lower connecting seat; 502, damper; 503, support spring; 504, supporting ring; 505, flowmeter to be measured; 506, upper connecting seat; 6, water tank; 7, pump body; 8, first shunt pipe; 9, hose; 10, second shunt pipe; 11, flowmeter group; 12, switching assembly; 1201, telescopic rod; 1202, return spring; 1203, drive frame; 1204, sliding sleeve; 1205, drive rod; 1206, rotating shaft; 1207, throttle plate; 1208, sealing baffle; 13, drainage assembly; 1301, return pipe; 1302, guide groove; 1303, T-shaped frame; 1304, return spring; 1305, sealing plug; 1306, bent rod; 14, ventilation assembly; 1401, intake cylinder; 1402, filter screen; 1403, piston rod; 1404, compression spring; 1405, top plate; 1406, spring rod. Detailed implementation mode

[0022] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a high-stability flowmeter testing device and method, including a frame 1 and a positioning assembly 5. A workbench 2 is fixed in the middle of the front end of the frame 1, and a control panel 3 is arranged in the center of the top of the workbench 2. A drive assembly 4 is arranged at the upper end of the frame 1. The positioning assembly 5 is arranged at both ends of the top of the workbench 2. The positioning assembly 5 includes a lower connecting seat 501, a damper 502, a support spring 503, a supporting ring 504, a flowmeter to be measured 505 and an upper connecting seat 506. Lower connecting seats 501 are arranged at both ends of the top of the workbench 2, and the upper end of the lower connecting seat 501 is frustum-shaped. A damper 502 is arranged on the top of the workbench 2, and a support spring 503 is sleeved outside the damper 502, and the top of the support spring 503 is connected with a supporting ring 504. The top of the lower connecting seat 501 is provided with a flowmeter to be measured 505, and an upper connecting seat 506 is arranged at the top of the flowmeter to be measured 505.

[0023] Please refer to Figures 1 to 4, the driving assembly 4 includes a motor 401, a gear 402, a rack 403, a driving plate 404 and a guide rod 405. The output shaft of the motor 401 is connected to the gear 402, and the rack 403 is meshed on both sides of the gear 402. One side of the rack 403 is fixed with the driving plate 404, and the guide rod 405 is slidably connected to the inside of the rear end of the driving plate 404. And the guide rod 405 is fixedly connected to the frame 1. The driving assembly 4 further includes a slide rod 406, a buffer spring 407 and a pressing plate 408. The slide rod 406 is slidably connected to the inside of both front ends of the driving plate 404, and the buffer spring 407 is sleeved on the outside of the slide rod 406. And the pressing plate 408 is arranged at the bottom of the slide rod 406. A water tank 6 is arranged at the front end of the lower part of the frame 1, and a pump body 7 is arranged at the top of the water tank 6. The top of the pump body 7 is connected with a first shunt pipe 8, and the first shunt pipe 8 is communicated with the lower connecting seat 501. A hose 9 is fixedly arranged in the center of the pressing plate 408, and the hose 9 is communicated with the upper connecting seat 506. The top of the hose 9 is connected with a second shunt pipe 10, and a flowmeter group 11 is arranged at the end of the second shunt pipe 10. And the flowmeter group 11 is communicated with the inside of the water tank 6; The specific operation is as follows. First, place the flowmeter 505 to be measured above the lower connecting seat 501. At this time, the supporting ring 504 supports the bottom of the flowmeter 505 to be measured, avoiding the influence on the docking effect due to the skew of the upper part of the flowmeter 505 to be measured when the upper connecting seat 506 moves downward. And the damper 502 can also suppress the vibration of the supporting spring 503, preventing the situation that the flowmeter 505 to be measured bounces off due to vibration after being placed on the supporting ring 504. After that, when the motor 401 drives the gear 402 to rotate, the two racks 403 move in opposite directions. And when one of the racks 403 moves upward, it drives the driving plate 404 to slide on the guide rod 405, thereby pulling the pressing plate 408 through the slide rod 406, so that the upper connecting seat 506 is separated from the flowmeter 505 to be measured. Similarly, the other driving plate 404 drives the pressing plate 408 to move downward through the buffer spring 407, and the upper connecting seat 506 can press and fix the flowmeter 505 to be measured. And since both the upper connecting seat 506 and the lower connecting seat 501 are in a hollow frustum shape and are made of rubber material, they can be inserted into the inside of the flowmeter 505 to be measured and fit tightly with its end, thereby improving the connection convenience and enhancing the overall sealing performance at the same time, enabling the staff to replace the flowmeter 505 to be measured at another station while testing one of the flowmeters 505 to be measured, thus improving the efficiency of detecting multiple flowmeters. And during the test, the pump body 7 pumps the water in the water tank 6 into the first shunt pipe 8, and then sequentially passes through the flowmeter 505 to be measured, the hose 9, the second shunt pipe 10, and the flowmeter group 11 and returns to the water tank 6, and then observes the values of the flowmeter 505 to be measured and the standard flowmeter in the flowmeter group 11 to detect whether the flowmeter 505 to be measured is qualified.

[0024] Please refer toFigure 2 and Figures 5 to 7 , a switching component 12 is provided at the lower end of the rear part of the frame 1. The switching component 12 includes a telescopic rod 1201, a return spring 1202, a driving frame 1203, a sliding sleeve 1204 and a driving rod 1205. Telescopic rods 1201 are arranged at both ends of the rear side of the frame 1, and a return spring 1202 is sleeved on the outer side of the upper end of the telescopic rod 1201. The top of the return spring 1202 is connected to a driving frame 1203, and one side of the lower end of the driving frame 1203 is rotatably connected to a sliding sleeve 1204. And a driving rod 1205 is slidably connected inside the sliding sleeve 1204. The switching component 12 further includes a rotating shaft 1206, a throttling plate 1207 and a sealing baffle 1208. A rotating shaft 1206 is fixed to the end of the driving rod 1205, and throttling plates 1207 are fixed to the middle and rear ends of the rotating shaft 1206. And sealing baffles 1208 are arranged on both sides of the outer end of the throttling plate 1207. Drainage components 13 are arranged on both sides of the first shunt pipe 8. The drainage components 13 include a return pipe 1301, a guide groove 1302, a T-shaped frame 1303, a return spring 1304, a sealing plug 1305 and a bent rod 1306. Guide grooves 1302 are symmetrically formed in the inner sides of the upper ends of the return pipe 1301, and a T-shaped frame 1303 is slidably connected in the guide groove 1302. A return spring 1304 is sleeved on the outer side of the T-shaped frame 1303, and a sealing plug 1305 is connected to the end of the T-shaped frame 1303. And a bent rod 1306 is arranged on one side of the sealing plug 1305. An air venting component 14 is arranged on the top of the second shunt pipe 10. The air venting component 14 includes an air inlet cylinder 1401, a filter screen 1402 and a piston rod 1403. An air inlet cylinder 1401 is fixed to the top of the second shunt pipe 10, and filter screens 1402 are arranged on both sides of the upper end of the air inlet cylinder 1401. And a piston rod 1403 is slidably connected inside the air inlet cylinder 1401. The air venting component 14 further includes a compression spring 1404, a top plate 1405 and a spring rod 1406. A compression spring 1404 is sleeved on the outer side of the lower end of the piston rod 1403, and a top plate 1405 is arranged on the top of the piston rod 1403. And spring rods 1406 are fixed to both ends of the bottom of the top plate 1405; The specific operation is as follows. During the downward movement of the rack 403, its bottom presses the corresponding side of the driving frame 1203. At the same time, the telescopic rod 1201 limits and guides it, and then drives the rotation of the rotating shaft 1206 through the sliding sleeve 1204 and the driving rod 1205, so that the throttle plates 1207 inside the first flow dividing pipe 8 and the second flow dividing pipe 10 rotate to the vertical state for the water flow to pass through. At the same time, the upper end of the throttle plate 1207 pushes the bent rod 1306, making the sealing plug 1305 fit with the through hole on the first flow dividing pipe 8, thereby preventing the water flow from entering the return pipe 1301. And the compression spring 1404 in the air inlet cylinder 1401 pushes the piston rod 1403 to seal the top of the second flow dividing pipe 10, so that the water flow can circulate inside one end of the first flow dividing pipe 8, the second flow dividing pipe 10 and the water tank 6. And since the rack 403 on the other end does not press the driving frame 1203 when moving upward, the return spring 1202 then pushes the driving frame 1203 under the limit of the telescopic rod 1201, making the throttle plate 1207 fit tightly with the sealing baffle 1208 to prevent the water flow from passing through. At the same time, the return spring 1304 also pushes the T-shaped frame 1303 to move it in the guiding groove 1302, enabling the sealing plug 1305 to separate from the first flow dividing pipe 8. And when the rack 403 drives the driving plate 404 to move upward, it also presses the spring rod 1406, thereby pulling the piston rod 1403 upward through the top plate 1405, so that the external air can enter the air inlet cylinder 1401 through the filter screen 1402 to balance the air pressure above the second flow dividing pipe 10, enabling the water flow inside the flowmeter after detection to be quickly discharged into the water tank 6 through the return pipe 1301 for recycling, preventing the problem of water spillage due to excessive internal water flow when disassembling the flowmeter 505 to be measured.

[0025] In summary, for the high-stability flowmeter testing device and method, during use, first place the flowmeter 505 to be tested above the lower connecting seat 501. At this time, the supporting ring 504 supports the bottom of the flowmeter 505 to be tested, and the damper 502 also suppresses the vibration of the supporting spring 503. Secondly, when the motor 401 drives the gear 402 to rotate, the rack 403 on one side moves downward, and the driving plate 404 slides on the guide rod 405 and drives the pressing plate 408 to move downward through the buffer spring 407, so that the upper connecting seat 506 presses and fixes the flowmeter 505 to be tested. Then, during the downward movement of the rack 403, its bottom presses the driving frame 1203 on the corresponding side, and at the same time, the telescopic rod 1201 limits and guides it, so as to drive the rotating shaft 1206 to rotate through the sliding sleeve 1204 and the driving rod 1205, and make the throttle plates 1207 inside the first shunt pipe 8 and the second shunt pipe 10 rotate to the vertical state. The upper end of the throttle plate 1207 also pushes the bent rod 1306, so that the sealing plug 1305 fits with the through hole on the first shunt pipe 8. At the same time, the compression spring 1404 in the air inlet cylinder 1401 pushes the piston rod 1403 to seal the top of the second shunt pipe 10. Since the rack 403 at the other end moves upward and does not press the driving frame 1203, the reset spring 1202 on the same side pushes the driving frame 1203 under the limit of the telescopic rod 1201 at this time, so that the throttle plate 1207 and the sealing baffle 1208 are closely attached to each other to prevent water flow through. Then, during the test, the pump body 7 pumps the water in the water tank 6 into the first shunt pipe 8, and then sequentially passes through the flowmeter 505 to be tested, the hose 9, the second shunt pipe 10, and the flowmeter group 11 and returns to the water tank 6, and then observes the values of the flowmeter 505 to be tested and the standard flowmeters in the flowmeter group 11 to detect whether the flowmeter 505 to be tested is qualified. Finally, during the detection process, place another flowmeter 505 to be tested on another work station. And when it needs to be disassembled after detecting the previous flowmeter 505 to be tested, the motor 401 drives the gear 402 to rotate in the reverse direction, so that the rack 403 on the same side moves upward. At this time, the throttle plate 1207 on the same side rotates to the horizontal state, and the return spring 1304 pushes the T-shaped frame 1303 to move it in the guide groove 1302, so that the sealing plug 1305 is separated from the first shunt pipe 8. At the same time, when the driving plate 404 moves upward, it also presses the spring rod 1406, so as to pull the piston rod 1403 upward through the top plate 1405, so that the external air enters the air inlet cylinder 1401 through the filter screen 1402 to balance the air pressure in the upper part of the second shunt pipe 10, so that the water flow inside the flowmeter after detection quickly drains into the water tank 6 through the return pipe 1301 for recycling, and during disassembly and replacement, it can also position and test another flowmeter 505 to be tested.

[0026] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments adapted to particular uses with various modifications.

Claims

1. A flowmeter testing device with high stability, characterized in that, It includes a frame (1) and a positioning component (5). In the middle of the front end of the frame (1), a workbench (2) is fixed, and a control panel (3) is arranged at the center of the top of the workbench (2). A driving component (4) is arranged at the upper end of the frame (1). The positioning component (5) is arranged at both ends of the top of the workbench (2). The positioning component (5) includes a lower connecting seat (501), a damper (502), a support spring (503), a support ring (504), a flowmeter to be measured (505), and an upper connecting seat (506). Lower connecting seats (501) are arranged at both ends of the top of the workbench (2), and the upper end of the lower connecting seat (501) is frustum-shaped. A damper (502) is arranged on the top of the workbench (2), and a support spring (503) is sleeved outside the damper (502), and the top of the support spring (503) is connected with a support ring (504). The flowmeter to be measured (505) is arranged on the top of the lower connecting seat (501), and an upper connecting seat (506) is arranged at the top of the flowmeter to be measured (505).

2. A high-stability flowmeter testing device according to claim 1, characterized in that, The driving component (4) includes a motor (401), a gear (402), a rack (403), a driving plate (404), and a guide rod (405). The output shaft of the motor (401) is connected with the gear (402), and racks (403) are meshed on both sides of the gear (402). A driving plate (404) is fixed on one side of the rack (403), and a guide rod (405) is slidably connected inside the rear end of the driving plate (404), and the guide rod (405) is fixedly connected with the frame (1).

3. A high-stability flowmeter testing device according to claim 2, characterized in that, The driving component (4) further includes a slide rod (406), a buffer spring (407), and a pressing plate (408). Slide rods (406) are slidably connected inside both ends of the front part of the driving plate (404), a buffer spring (407) is sleeved outside the slide rod (406), and a pressing plate (408) is arranged at the bottom of the slide rod (406).

4. A high-stability flowmeter testing device according to claim 3, characterized in that, A water tank (6) is arranged at the front end of the lower part of the frame (1), and a pump body (7) is arranged on the top of the water tank (6). A first shunt pipe (8) is connected to the top of the pump body (7), and the first shunt pipe (8) is communicated with the lower connecting seat (501). A hose (9) is fixedly arranged at the center of the inside of the pressing plate (408), and the hose (9) is communicated with the upper connecting seat (506). A second shunt pipe (10) is connected to the top of the hose (9), and a flowmeter group (11) is arranged at the end of the second shunt pipe (10), and the flowmeter group (11) is communicated with the inside of the water tank (6).

5. A high-stability flowmeter testing device according to claim 1, characterized in that, A switching component (12) is provided at the lower end of the rear part of the frame (1). The switching component (12) includes a telescopic rod (1201), a return spring (1202), a driving frame (1203), a sliding sleeve (1204) and a driving rod (1205). Telescopic rods (1201) are arranged at both ends of the rear side of the frame (1), and a return spring (1202) is sleeved on the outer side of the upper end of the telescopic rod (1201). The top of the return spring (1202) is connected to a driving frame (1203), and one side of the lower end of the driving frame (1203) is rotatably connected to a sliding sleeve (1204), and a driving rod (1205) is slidably connected inside the sliding sleeve (1204).

6. A highly stable flowmeter testing device according to claim 5, characterized in that The switching component (12) further includes a rotating shaft (1206), a throttle plate (1207) and a sealing baffle (1208). A rotating shaft (1206) is fixed to the end of the driving rod (1205), and throttle plates (1207) are fixed to the middle and rear ends of the rotating shaft (1206), and sealing baffles (1208) are arranged on both sides of the outer end of the throttle plate (1207).

7. A high-stability flowmeter testing device according to claim 4, wherein, Drainage components (13) are arranged on both sides of the first shunt pipe (8). The drainage components (13) include a return pipe (1301), a guide groove (1302), a T-shaped frame (1303), a return spring (1304), a sealing plug (1305) and a bent rod (1306). Guide grooves (1302) are symmetrically formed in the inner sides of the upper ends of the return pipe (1301), and a T-shaped frame (1303) is slidably connected inside the guide groove (1302). A return spring (1304) is sleeved on the outer side of the T-shaped frame (1303), and a sealing plug (1305) is connected to the end of the T-shaped frame (1303), and a bent rod (1306) is arranged on one side of the sealing plug (1305).

8. A highly stable flowmeter testing device according to claim 4, characterized in that, An air venting component (14) is arranged on the top of the second shunt pipe (10). The air venting component (14) includes an air inlet cylinder (1401), a filter screen (1402) and a piston rod (1403). An air inlet cylinder (1401) is fixed to the top of the second shunt pipe (10), and filter screens (1402) are arranged on both sides of the upper end of the air inlet cylinder (1401), and a piston rod (1403) is slidably connected inside the air inlet cylinder (1401).

9. A high-stability flowmeter testing device according to claim 8, characterized in that, The air venting component (14) further includes a compression spring (1404), a top plate (1405) and a spring rod (1406). A compression spring (1404) is sleeved on the outer side of the lower end of the piston rod (1403), and a top plate (1405) is arranged on the top of the piston rod (1403), and spring rods (1406) are fixed to both ends of the bottom of the top plate (1405).

10. A flowmeter testing method with high stability, characterized in that, Applied to the high-stability flowmeter testing device according to any one of claims 1-9, it includes the following steps: S1: Place the flowmeter to be tested (505) above the lower connecting seat (501). At this time, the supporting ring (504) supports the bottom of the flowmeter to be tested (505), and the damper (502) also suppresses the vibration of the supporting spring (503). S2: The motor (401) drives the gear (402) to rotate, causing the rack (403) on one side to move downward. Then the driving plate (404) slides on the guiding rod (405) and drives the pressing plate (408) to move downward through the buffer spring (407), so that the upper connecting seat (506) presses and fixes the flowmeter to be tested (505). S3: Since the rack (403) at the other end moves upward and does not squeeze the driving frame (1203), the reset spring (1202) on the same side then pushes the driving frame (1203) under the limit of the telescopic rod (1201), making the intercepting plate (1207) fit with the sealing baffle (1208) to prevent water flow through. S4: Detect whether the flowmeter to be tested (505) is qualified by observing the values of the flowmeter to be tested (505) and the standard flowmeters in the flowmeter group (11). S5: The water flow inside the flowmeter after detection quickly drains into the water tank (6) through the return pipe (1301) for recycling, so as to facilitate the disassembly and replacement of the flowmeter to be tested (505).

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