Device for testing sealing performance of electrode of small-caliber electromagnetic flowmeter

Abstract

The utility model discloses a small-caliber electromagnetic flowmeter electrode sealing performance testing device, which relates to the technical field of testing devices and comprises a base, a left supporting plate and a right supporting plate, the left supporting plate and the right supporting plate are arranged at the top of the base, the right supporting plate is fixedly connected to the upper surface of the base, and the right supporting plate and the left supporting plate are arranged in parallel. And the side, away from the left supporting plate, of the right supporting plate is symmetrically connected with right side oil cylinders, the output ends of the right side oil cylinders penetrate through the right supporting plate, and the output ends of the right side oil cylinders are connected with a right sealing plate. According to the small-caliber electromagnetic flowmeter electrode sealing performance test device, the situation that the detection device extrudes the measuring tube from the two sides to cause deformation of the measuring tube can be avoided, pressure does not act on the tube body, the requirement of a small-caliber high-pressure test can be met, meanwhile, the two-way movement operation is simple, and the test efficiency is high. And the left and right sealing plates can be quickly replaced to meet the test requirements of measuring tubes with different calibers.

Description

Technical Field

[0001] The utility model relates to the technical field of test devices, and more specifically, to a small-diameter electromagnetic flowmeter electrode sealing performance test device. Background Technique

[0002] A small-diameter electromagnetic flowmeter is an instrument used to measure the volumetric flow rate of conductive liquids and is widely used in industries such as chemical engineering, pharmaceuticals, and water treatment. To ensure its normal operation and accuracy, the sealing performance of the electrodes is very important. If there is leakage at the part where the electrodes contact the fluid, it may lead to measurement errors or even equipment damage. Therefore, it is necessary to conduct an electrode sealing performance test on the small-diameter electromagnetic flowmeter.

[0003] Generally, the test requires using water as the medium and conducting a pressure test on the measuring tube of the electromagnetic flowmeter at 1.5 times the design pressure. It is necessary to ensure that there is no leakage and no pressure drop in the measuring tube within the specified time limit to be considered qualified. For example, the Chinese patent with the application number 202320115717.5 discloses a sealing detection device for a gas roots flowmeter, the structure of which includes a mounting frame, and a detection water tank is fixedly installed at the upper end of the mounting frame. A detection plate is arranged inside the detection water tank, a connecting plate is fixedly connected to the side of the lower end of the detection plate, a lifting assembly is arranged inside the detection water tank, and a placement seat is fixedly connected to the lower end of the surface of the detection plate. This sealing detection device for a gas roots flowmeter can perform flow detection.

[0004] The current electrode sealing performance test still has the following problems:

[0005] 1. The connection between the current flowmeter and the detection device usually uses bolt connection. Each time a test is conducted, it is necessary to disassemble and assemble the flange bolts twice, which is very cumbersome and results in too low detection efficiency. Although some detection devices use a hydraulic cylinder to improve the connection efficiency and the hydraulic cylinder moves from both sides towards the flowmeter for connection, since the seal is achieved by extrusion, the entire flowmeter will be subjected to a large axial extrusion, which is likely to cause deformation of the flowmeter tube body.

[0006] 2. There will be a certain error when welding the flowmeter tube body and the flanges on both sides, and it is impossible to maintain an absolutely perpendicular relationship. That is, when connecting the flange on the flowmeter to the detection device, there will be a situation of poor sealing, resulting in deviation of the detection data.

[0007] Therefore, it is very necessary to propose a small-diameter electromagnetic flowmeter electrode sealing performance test device to solve the above problems. Content of the Utility Model

[0008] In view of the above problems, the utility model provides a sealing test device for electrodes of a small-diameter electromagnetic flowmeter, which has the functions of increasing the sealing performance during detection, improving the detection accuracy, meeting the detection requirements for different usage scenarios, being simple to operate, having strong controllability, and high stability.

[0009] In order to achieve the above object, the utility model specifically adopts the following technical solutions:

[0010] A sealing test device for electrodes of a small-diameter electromagnetic flowmeter includes a base and a left support plate and a right support plate located at the top of the base. The right support plate is fixedly connected to the upper surface of the base. The right support plate and the left support plate are arranged in parallel. On the side of the right support plate away from the left support plate, a right oil cylinder is symmetrically connected. The output end of the right oil cylinder penetrates the right support plate, and the output end of the right oil cylinder is connected to a right sealing plate.

[0011] On the side of the left support plate away from the right support plate, a left oil cylinder is connected. The output end of the left oil cylinder penetrates the left support plate, and the output end of the left oil cylinder is connected to a left sealing plate. Grooves are formed at the tops of the left sealing plate and the right sealing plate, and a measuring pipe is installed in the grooves.

[0012] In the middle of the surfaces of the left support plate and the right sealing plate facing the measuring pipe, a circular boss is provided. A through hole is formed at the center of the circular boss, and a sealing gasket is connected to the inner ring surface of the circular boss. The sealing gasket corresponds to the flanges at both ends of the measuring pipe.

[0013] Preferably, a water inlet valve coaxial with the through hole is connected to the side of the left support plate close to the left oil cylinder. An exhaust valve is connected to the top of the circular boss on one side of the left support plate. A drain valve coaxial with the water inlet valve is connected to the side of the right support plate close to the right oil cylinder.

[0014] Preferably, guide rails are symmetrically connected to the top of the base. A slider is slidably connected to the guide rails, and a flexible support assembly is connected between the slider and the left support plate.

[0015] Preferably, the flexible support assembly includes a buffer assembly bottom plate and symmetric rubber buffer columns fixed to the top of the buffer assembly bottom plate. Threads are provided at the tops of the rubber buffer columns, and the bottom of the left support plate is installed on the tops of the rubber buffer columns through nuts.

[0016] Preferably, grooves are formed on both sides of the bottoms of the left support plate and the right sealing plate. Threaded portions passing through the grooves are provided at the output ends of the left oil cylinder and the right oil cylinder, and limit nuts are threadedly connected to the threaded portions.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. This device is equipped with left and right sealing plate components. By retracting the hydraulic cylinder, the two ends of the measuring pipe are pressed against the sealing gasket, thus conducting a sealing test. This avoids the situation where the detection device squeezes the measuring pipe from both sides, causing deformation of the measuring pipe, ensuring that pressure does not act on the pipe body, and meeting the requirements of small-diameter high-pressure tests. At the same time, the two-way movement is simple to operate, and the left and right sealing plates can be quickly replaced to meet the test requirements of measuring pipes with different diameters.

[0019] 2. A flexible support component is arranged at the bottom of the left support plate of this device. Through the deformation of the rubber buffer columns on the flexible support component, it can adapt to the situation where the pipe body of the measuring pipe is not perpendicular to the flange, thereby improving the sealing ability between the flanges at both ends of the measuring pipe and the sealing gasket. Even in the case of large errors, sealing can still be completed.

[0020] 3. Multiple grooves are provided on the upper surfaces of the left and right sealing plates of this device. The grooves at the top are convenient for placing the measuring pipe, and the installation of the measuring pipe can be completed simply by placing it. The operation is simple, the disassembly and assembly are convenient, and the efficiency is high. The grooves at the bottom are convenient for detaching it from the output end of the hydraulic cylinder, thereby replacing the left and right sealing plates to adapt to different types of measuring pipes and expanding the applicable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0022] Figure 2 is a top view of the present utility model when placing the measuring pipe;

[0023] Figure 3 is a cross-sectional view of the present utility model when placing the measuring pipe;

[0024] Figure 4 is a schematic diagram of the structure of the flexible support component in the present utility model;

[0025] Figure 5 is a schematic diagram of the structure of the left support plate in the present utility model;

[0026] Figure 6 is a schematic diagram of the structure of the left sealing plate in the present utility model.

[0027] REFERENCE NUMERALS:

[0028] 1. Left oil cylinder; 2. Left support plate; 3. Left sealing plate; 4. Exhaust valve; 5. Limit nut; 6. Right sealing plate; 7. Right support plate; 8. Sealing gasket; 9. Drain valve; 10. Right oil cylinder; 11. Base; 12. Flexible support component; 13. Slide block; 14. Guide rail; 15. Inlet valve; 121. Rubber buffer column; 122. Buffer component bottom plate; 16. Measuring pipe. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1-6 , a small-diameter electromagnetic flowmeter electrode sealing performance test device, including a base 11 and a left support plate 2 and a right support plate 7 located at the top of the base 11. The right support plate 7 is fixed on the base 11. The left support plate 2 can move along the guide rail 14 to adapt to flowmeters of different lengths, improving the applicable range. The right support plate 7 is fixedly connected to the upper surface of the base 11. The right support plate 7 and the left support plate 2 are arranged in parallel. On the side of the right support plate 7 away from the left support plate 2, right side oil cylinders 10 are symmetrically connected. The output ends of the right side oil cylinders 10 and the left side oil cylinder 1 are arranged opposite to each other. The output end of the right side oil cylinder 10 penetrates through the right support plate 7. The output end of the right side oil cylinder 10 is connected to a right sealing plate 6. The initial position of the right side oil cylinder 10 is in the extended state. When it is necessary to fix with the measuring pipe 16, the right side oil cylinder 10 is started, so that the output end of the right side oil cylinder 10 retracts, thereby bringing one end of the flowmeter into contact with the sealing gasket 8;

[0031] Refer to Figures 1 to 3 , on the side of the left support plate 2 away from the right support plate 7, a left side oil cylinder 1 is connected. The function of the left side oil cylinder 1 is the same as that of the right side oil cylinder 10, which is used to fix the other end of the measuring pipe 16. The output end of the left side oil cylinder 1 penetrates through the left support plate 2. The output end of the left side oil cylinder 1 is connected to a left sealing plate 3. Grooves are provided at the tops of the left sealing plate 3 and the right sealing plate 6. The grooves and the through holes on the left support plate 2 are on the same axis. By replacing the right sealing plate 6 and the left sealing plate 3 with grooves of different sizes, the effect of adapting to measuring pipes 16 of different diameters can be achieved. The measuring pipe 16 is installed in the groove. The measuring pipe 16 is the electromagnetic flowmeter to be measured;

[0032] Refer to Figure 5 , in the middle of the surfaces of the left support plate 2 and the right sealing plate 6 facing the measuring pipe 16, circular bosses are provided. The thickness of the circular bosses is greater than that of the sealing gasket 8. Through holes are provided through the centers of the circular bosses. The water inlet valve 15, the grooves and the through holes on the left sealing plate 3 and the right sealing plate 6 are on the same axis. A sealing gasket 8 is connected to the inner ring surface of the circular boss. The sealing gasket 8 is used to increase the sealing performance when connecting with the flanges on both sides of the measuring pipe 16. The sealing gasket 8 corresponds to the flanges at both ends of the measuring pipe 16.

[0033] Specifically, refer to Figure 3The left support plate 2 is connected to a water inlet valve 15 coaxial with the through hole on one side near the left oil cylinder 1. The water inlet valve 15 is connected to the external water supply end. The top of the circular boss on one side of the left support plate 2 is connected to an exhaust valve 4. The exhaust valve 4 is used to exhaust the air inside the measuring tube 16 during detection. The exhaust valve 4 is connected to the through hole on the left support plate 2. The right support plate 7 is connected to a drain valve 9 coaxial with the water inlet valve 15 on one side near the right oil cylinder 10.

[0034] Specifically, refer to Figure 1 The top of the base 11 is symmetrically connected to a guide rail 14, and a slider 13 is slidably connected to the guide rail 14. The left support plate 2 can move toward the right support plate 7 on the base 11 through the slider 13 and the guide rail 14. A flexible support component 12 is connected between the slider 13 and the left support plate 2. The flexible support component 12 can adapt to the angle between the measuring tube 16 and the flanges at both ends.

[0035] Specifically, refer to Figure 4 The flexible support component 12 includes a buffer component base plate 122 and a rubber buffer column 121 symmetrically fixed to the top of the buffer component base plate 122. The rubber buffer column 121 can be deformed after being subjected to force. The top of the rubber buffer column 121 is provided with a thread. The left support plate 2 can be installed on the top of the rubber buffer column 121 through the thread, and the bottom of the left support plate 2 is installed on the top of the rubber buffer column 121 through a nut.

[0036] Specifically, refer to Figure 6 Grooves are provided on both sides of the bottom of the left support plate 2 and the right sealing plate 6. The grooves facilitate the installation of the left sealing plate 3 on the output end of the left oil cylinder 1 or the right oil cylinder 10. At the same time, the limit nut 5 that is easy to disassemble is used to quickly disassemble the left sealing plate 3 or the right sealing plate 6. The output ends of the left oil cylinder 1 and the right oil cylinder 10 are provided with threaded portions passing through the grooves, and the threaded portions are threadedly connected with the limit nut 5.

[0037] In this embodiment, when performing the test, the two ends of the measuring tube 16 are first placed in the grooves on the top of the left sealing plate 3 and the right sealing plate 6. After the installation is completed, the right oil cylinder 10 on the right support plate 7 is first started. The output end of the right oil cylinder 10 drives the right sealing plate 6 to retract. At this time, one end of the measuring tube 16 is driven to move toward the right support plate 7, and then contacts the sealing gasket 8 on the right support plate 7. The sealing gasket 8 improves the sealing of the connection by deformation. At the same time, since the left support plate 2 is connected to the slider 13, the left support plate 2 will move to the right on the guide rail 14;

[0038] Then, start the left oil cylinder 1 on the left support plate 2. The distance between the left support plate 2 and the left sealing plate 3 becomes smaller, thereby pressing one end of the measuring tube 16 against the gasket 8. At this time, the connection of the other end of the measuring tube 16 is completed, and the sealing of the left flange of the measuring tube 16 can be achieved. At the same time, since the other end of the measuring tube 16 has been fixed, the left support plate 2 will move to the right at this time. The flexible support assembly 12 can play a certain degree of deformation compensation when the flanges on both sides of the measuring tube 16 are not parallel to achieve the sealing effect.

[0039] After the connection is completed, close the drain valve 9, and inject water into the inlet valve 15 through the booster pump. The water will squeeze the gas in the cavity of the measuring tube 16 out through the exhaust valve 4. After the gas is exhausted, close the valve of the exhaust valve 4, and continuously inject water into the cavity of the measuring tube 16 until it reaches 1.5 times the working pressure of the measuring tube 16. Observe whether there is any water seepage in the measuring tube 16. After the test is completed, open the drain valve 9 to relieve the pressure. After the water is drained, loosen the oil cylinders on both sides and take out the measuring tube 16 to complete the operation. For measuring tubes 16 with different diameters, only need to loosen the limit nut 5 and replace the corresponding left support plate 2 and right support plate 7.

[0040] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A small-diameter electromagnetic flowmeter electrode sealing performance test device, characterized in that: It includes a base (11), a left support plate (2) and a right support plate (7) located at the top of the base (11). The right support plate (7) is fixedly connected to the upper surface of the base (11). The right support plate (7) and the left support plate (2) are arranged in parallel. On the side of the right support plate (7) away from the left support plate (2), right hydraulic cylinders (10) are symmetrically connected. The output end of the right hydraulic cylinder (10) penetrates the right support plate (7), and the output end of the right hydraulic cylinder (10) is connected to a right sealing plate (6). On the side of the left support plate (2) away from the right support plate (7), a left hydraulic cylinder (1) is connected. The output end of the left hydraulic cylinder (1) penetrates the left support plate (2), and the output end of the left hydraulic cylinder (1) is connected to a left sealing plate (3). Grooves are provided at the tops of the left sealing plate (3) and the right sealing plate (6), and a measuring tube (16) is installed in the grooves. In the middle of the surfaces of the left support plate (2) and the right sealing plate (6) facing the measuring tube (16), there are circular bosses. A through hole is provided at the center of the circular boss, and a sealing gasket (8) is connected to the inner ring surface of the circular boss. The sealing gasket (8) corresponds to the flanges at both ends of the measuring tube (16).

2. The electrode sealing test device for a small-caliber electromagnetic flowmeter according to claim 1, wherein: On the side of the left support plate (2) close to the left hydraulic cylinder (1), a water inlet valve (15) coaxial with the through hole is connected. On the top of the circular boss on one side of the left support plate (2), an exhaust valve (4) is connected. On the side of the right support plate (7) close to the right hydraulic cylinder (10), a drain valve (9) coaxial with the water inlet valve (15) is connected.

3. A small-caliber electromagnetic flowmeter electrode sealing performance test device according to claim 1, characterized in that: On the top of the base (11), guide rails (14) are symmetrically connected. A slider (13) is slidably connected to the guide rails (14), and a flexible support assembly (12) is connected between the slider (13) and the left support plate (2).

4. The electrode sealing test device for a small-caliber electromagnetic flowmeter according to claim 3, characterized in that: The flexible support assembly (12) includes a buffer assembly bottom plate (122) and symmetric rubber buffer columns (121) fixed to the top of the buffer assembly bottom plate (122). Threads are provided at the tops of the rubber buffer columns (121), and the bottom of the left support plate (2) is installed on the tops of the rubber buffer columns (121) through nuts.

5. The electrode sealing test device for a small-diameter electromagnetic flowmeter according to claim 4, characterized in that: Grooves are provided on both sides at the bottoms of the left support plate (2) and the right sealing plate (6). Threaded portions passing through the grooves are provided at the output ends of the left hydraulic cylinder (1) and the right hydraulic cylinder (10), and limit nuts (5) are threadedly connected to the threaded portions.

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