Detection device of pressure gauge movement

Abstract

The invention belongs to the technical field of pressure gauge quality detection, and particularly relates to a pressure gauge movement detection device which comprises a conveyor and a rack. A group of bearing assemblies are uniformly distributed on the surface of the conveying belt; an electric telescopic rod and a detection sleeve are arranged on the rack; the output end of the electric telescopic rod is connected with a mounting seat I and a mounting seat II; a servo motor and a control part are arranged on the mounting seat I; a visual sensor is arranged on the mounting seat II; one side of the detection sleeve is provided with an air connection port; and the air receiving port is communicated with an air supply pipe. Through cooperation of the conveyor, the servo tightening mechanism and the visual sensor, online automatic operation of the whole process of conveying, positioning, connecting, inflation and visual detection is achieved, and a traditional manual operation mode is effectively replaced. The visual sensor is used for capturing and analyzing pointer response in real time and automatically comparing the pointer response with a set air pressure value, the movement performance is rapidly judged, and subjective errors and efficiency bottlenecks of human eye observation are overcome.

Description

Technical Field

[0001] This invention belongs to the field of pressure gauge quality testing technology, specifically a testing device for pressure gauge movement. Background Technology

[0002] Pressure gauges, as critical industrial measuring instruments, are widely used in the safety monitoring and process control of pressure-bearing equipment such as boilers, pipelines, and storage tanks. The accuracy of their readings directly affects the safe operation of the equipment and the stability of the process. The pressure gauge movement, as the core transmission component driving the pointer rotation, determines the overall performance of the pressure gauge through its accuracy, sensitivity, and reliability. Therefore, it is crucial to conduct specialized testing of the movement during the pressure gauge manufacturing process. By simulating actual pressure conditions and accurately evaluating the movement's response, it is possible to effectively ensure that the pressure gauge can accurately and reliably reflect the system pressure status after being put into use, thereby providing a guarantee for safe production and precise control.

[0003] Chinese patent application CN209117255U discloses a boiler pressure gauge movement testing device. The key technical features are: a base plate with multiple test chambers fixed at equal intervals on its upper end; each test chamber has a cavity with a through-hole at the top; each cavity has a groove on its opposite sidewalls; each groove contains a slider; each slider has a transmission device; each slider has a connecting rod fixed to one opposite side; one end of each connecting rod is fixed to a threaded sleeve; a gauge body is detachably connected to the threaded sleeve; one end of the threaded sleeve is connected to a connecting hose; one end of the connecting hose penetrates one sidewall of the cavity and extends to one side of the test chamber.

[0004] However, the above-mentioned technologies often have the following drawbacks: they rely entirely on manual loading, immersion, bubble observation, and comparison of readings of the pressure gauge, and fail to integrate conveying, positioning, tightening, detection, and data judgment into one unit. They cannot achieve continuous automatic loading and unloading and detection, are difficult to embed into automated production lines to achieve assembly line operation, are inefficient and labor-intensive, and rely on human eyes to observe the pressure gauge pointer reading to evaluate the movement performance, which has the problems of strong subjectivity, inability to quantify, easy visual fatigue and misjudgment, and lack of automatic data recording and judgment capabilities.

[0005] Therefore, the present invention provides a testing device for pressure gauge movement. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a pressure gauge movement testing device according to the present invention, comprising a conveyor and a frame; The conveyor transports pressure gauges to be tested and those that have been tested via a conveyor belt; a set of receiving components for placing the pressure gauges are evenly distributed on the surface of the conveyor belt. An electric telescopic rod is fixedly connected to the top of the frame; the output end of the electric telescopic rod is connected to a mounting base one; a servo motor is fixedly connected inside the mounting base one; a control component is connected to the output end of the servo motor; a mounting base two is fixedly connected to the side of the mounting base one via a connecting rod; a vision sensor is fixedly connected inside the mounting base two. The bottom of the frame is fixedly connected to a detection sleeve by a connecting rod; the detection sleeve is located inside the conveyor at the position below the top conveyor belt; the inner top of the detection sleeve is provided with a thread that mates with a pressure gauge; an air inlet is provided on one side of the detection sleeve; the air inlet is connected to an air supply pipe, and the air supply pipe is connected to an air source device.

[0008] Preferably, the gas supply pipe is equipped with an electrically controlled valve; a pressure sensor is provided on one side of the detection sleeve.

[0009] Preferably, the control element is designed as an arc-shaped structure that adapts to the shape of the top of the pressure gauge.

[0010] Preferably, the receiving component includes a fixed box; the fixed box has an opening at the top; a movable box is slidably connected inside the fixed box; a set of springs are evenly distributed between the movable box and the fixed box; a connecting ring is fixedly connected to the middle of the movable box; and a mating ring is rotatably connected inside the connecting ring.

[0011] Preferably, a support frame is fixedly connected to the top of the mating ring, and the support frame is adapted to the shape of the bottom of the pressure gauge.

[0012] Preferably, an installation block is fixedly connected inside the detection sleeve, and the air inlet is located above the installation block; an elastic corrugated pipe is fixedly connected to the upper side of the installation block; a lifting plate is fixedly connected to the top of the corrugated pipe; a set of air holes are evenly distributed inside the lifting plate, and the air holes communicate with the inside of the corrugated pipe.

[0013] Preferably, a breathable plate is fixedly connected to the upper side of the lifting plate; the breathable plate is made of mesh material.

[0014] Preferably, a set of slag collection grooves are evenly distributed on the side of the mounting block; a sealing cover is provided at the bottom of the detection sleeve; and a storage cavity is formed between the mounting block and the sealing cover.

[0015] Preferably, an inclined guide vane is fixedly connected to the inner side of the detection sleeve at the position corresponding to the air inlet.

[0016] Preferably, an inclined baffle is fixedly connected between the top of the guide vane and the detection sleeve; a triangular cavity is formed between the guide vane, the baffle, and the detection sleeve; a through groove is formed on the surface of the baffle; an elastic piece is provided on the upper side of the through groove, and the top of the elastic piece is fixedly connected to the baffle.

[0017] The beneficial effects of this invention are as follows: 1. The pressure gauge movement testing device of the present invention, through the collaboration of a conveyor, a servo tightening mechanism and a vision sensor, realizes the fully online automated operation of the entire process from conveying, positioning, connection, inflation and visual inspection, effectively replacing the traditional manual operation mode. It not only greatly improves the testing efficiency, but also avoids the interference of connection errors that may occur when manually tightening the pressure gauge on the test results. The vision sensor can capture and analyze the pointer response in real time and automatically compare it with the set air pressure value to quickly judge the performance of the movement, realize the objectivity and data of the testing process, overcome the subjective error and efficiency bottleneck of human eye observation, and provide reliable technical support for the quality screening of pressure gauges.

[0018] 2. The pressure gauge movement testing device of the present invention, after inflating the inside of the testing sleeve through the air supply pipe, closes the electronic control valve, thereby forming a sealed space between the testing sleeve and the pressure gauge movement. Then, the pressure sensor continuously reads the air pressure value inside the testing sleeve. If the air pressure value does not drop or the drop is within a reasonable range within a certain period of time, it can be determined that the airtightness of the connection between the pressure gauge and the testing sleeve is qualified and stable. This method can eliminate connection airtightness problems and more accurately quantify the airtightness status.

[0019] 3. In the pressure gauge movement testing device of the present invention, when the threaded post at the bottom of the pressure gauge is connected to the inside of the testing sleeve, the threaded post will press down on the lifting plate, causing the bellows to contract. At this time, the gas inside the bellows will be ejected to the side through the air hole of the lifting plate, forming an airflow to flush the threaded area inside the testing sleeve, blowing away the residual metal shavings from the threaded surface, and preventing the metal shavings from affecting the airtightness between the pressure gauge and the testing sleeve during subsequent connection. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the frame structure in this invention; Figure 3 This is a schematic diagram of the structure of the receiving component in this invention; Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle; Figure 5This is a cross-sectional view of the present invention; Figure 6 yes Figure 5 Enlarged view of a section at point B in the middle; Figure 7 yes Figure 6 Enlarged view of a section at point C; Figure 8 yes Figure 6 Enlarged view of a section at point D.

[0022] In the diagram: 1. Conveyor; 2. Frame; 3. Conveyor belt; 4. Pressure gauge; 5. Electric telescopic rod; 6. Mounting base one; 7. Servo motor; 8. Control component; 9. Mounting base two; 10. Vision sensor; 11. Detection sleeve; 12. Air inlet; 13. Air supply pipe; 14. Electric control valve; 15. Pressure sensor; 16. Fixed box; 17. Movable box; 18. Spring; 19. Connecting ring; 20. Fitting ring; 21. Support frame; 22. Mounting block; 23. Corrugated pipe; 24. Lifting plate; 25. Air vent; 26. Slag collection trough; 27. Sealing cover; 28. Storage cavity; 29. ​​Guide plate; 30. Baffle plate; 31. Through groove; 32. Elastic plate; 33. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 8 As shown, the pressure gauge movement testing device of the present invention includes a conveyor 1 and a frame 2; The conveyor 1 transmits pressure gauges 4 to be tested and those that have been tested via the conveyor belt 3; a set of receiving components for placing the pressure gauges 4 are evenly distributed on the surface of the conveyor belt 3. An electric telescopic rod 5 is fixedly connected to the top of the frame 2; the output end of the electric telescopic rod 5 is connected to a mounting base 6; a servo motor 7 is fixedly connected inside the mounting base 6; a control component 8 is connected to the output end of the servo motor 7; a mounting base 9 is fixedly connected to the side of the mounting base 6 via a connecting rod; a vision sensor 10 is fixedly connected inside the mounting base 9. The bottom of the frame 2 is fixedly connected to a detection sleeve 11 by a connecting rod; the detection sleeve 11 is located inside the conveyor 1 at the position below the top conveyor belt 3; the inner top of the detection sleeve 11 is provided with a thread that mates with the pressure gauge 4; an air inlet 12 is provided on one side of the detection sleeve 11; the air inlet 12 is connected to an air supply pipe 13, and the air supply pipe 13 is connected to an air source device.

[0025] The pressure gauge 4 movement testing device in the existing technology relies entirely on manual loading, immersion, bubble observation and comparison of readings of the pressure gauge 4. It fails to integrate conveying, positioning, tightening, testing and data judgment into one, and cannot achieve continuous automatic loading and unloading and testing. It is difficult to integrate into automated production lines to achieve assembly line operation, resulting in low efficiency and high labor intensity. Furthermore, it evaluates the movement performance by observing the pressure gauge 4 pointer reading with human eyes, which has the problems of strong subjectivity, inability to quantify, easy visual fatigue and misjudgment, and lack of automatic data recording and judgment capabilities.

[0026] In this invention, pressure gauges 4 are conveyed by a conveyor 1. The pressure gauges 4, which were to be tested in the previous process, are placed sequentially on the receiving assembly. When the pressure gauges 4 move with the conveyor belt 3 to below the control component 8, the conveyor 1 stops operating. At this time, the electric telescopic rod 5 extends downwards, causing the mounting base 1 6 and mounting base 2 9 to move downwards as a whole, so that the control component 8 is fastened to the top of the pressure gauge 4. Then, the servo motor 7 drives the control component 8 to rotate, thereby causing the pressure gauge 4 to rotate. Simultaneously, the electric telescopic rod 5 continues to slowly extend, causing the threaded post at the bottom of the pressure gauge 4 to screw into the testing sleeve 11. The system automatically connects the pressure gauge 4 to the detection sleeve 11. Then, air is supplied to the inside of the detection sleeve 11 through the air source device and the air supply pipe 13. The airflow reaches the movement of the pressure gauge 4 through the detection sleeve 11 and detects the movement. At this time, the visual sensor 10 can capture the rotation of the pointer and the scale display on the dial of the pressure gauge 4 in real time to determine whether the movement responds accurately to the air pressure conditions. If the visual sensor 10 detects abnormal pointer rotation or the deviation between the pressure indication value and the set value of the air source device exceeds the threshold range, the system will automatically record the abnormal information of the pressure gauge 4.

[0027] After the test is completed, the pressure gauge 4 is rotated by the servo motor 7 to separate it from the test sleeve 11, and the electric telescopic rod 5 is retracted. Then, the conveyor 1 controls the pressure gauge 4, which has completed the test, to continue to be transported to the next process by the conveyor belt 3.

[0028] This invention achieves fully automated online operation of the entire process from conveying, positioning, connecting, inflation, and visual inspection through the coordinated action of conveyor 1, servo tightening mechanism, and vision sensor 10. It effectively replaces the traditional manual operation mode, which not only greatly improves the inspection efficiency, but also avoids the interference of connection errors that may occur when manually tightening pressure gauge 4 on the inspection results. The vision sensor 10 can capture and analyze the pointer response in real time and automatically compare it with the set air pressure value to quickly judge the performance of the mechanism, realize the objectivity and data-driven nature of the inspection process, overcome the subjective error and efficiency bottleneck of human eye observation, and provide reliable technical support for the quality screening of pressure gauge 4.

[0029] In one embodiment of the present invention, the air supply pipe 13 is equipped with an electrically controlled valve 14; a pressure sensor 15 is provided on one side of the detection sleeve 11, and the detection end of the pressure sensor 15 extends into the inside of the detection sleeve 11.

[0030] During the testing process, after the testing sleeve 11 is inflated through the air supply pipe 13, the electric control valve 14 is closed, thus forming a sealed space between the testing sleeve 11 and the pressure gauge 4 mechanism. Then, the pressure sensor 15 continuously reads the air pressure value inside the testing sleeve 11. If the air pressure value does not drop or the drop is within a reasonable range within a certain period of time, it can be determined that the airtightness of the connection between the pressure gauge 4 and the testing sleeve 11 is qualified and stable. Otherwise, it is impossible to determine whether the pressure gauge 4 mechanism is normal. This method can eliminate connection airtightness problems. Compared with the traditional water immersion bubble method, this device uses the pressure sensor 15 to monitor the air pressure change in real time, which can more accurately quantify the airtightness status and avoid the subjective error of manually observing the number and size of bubbles. At the same time, this method does not require immersing the equipment in water, eliminating the subsequent drying process, greatly shortening the testing cycle, and reducing the risk of damage to the internal components of the pressure gauge 4 caused by water immersion. It is especially suitable for testing scenarios of pressure gauge 4 mechanisms with high waterproof performance requirements or delicate internal structures, further improving the safety and applicability of the testing process.

[0031] In one embodiment of the present invention, the control element 8 is designed as an arc-shaped structure adapted to the top shape of the pressure gauge 4. This arc-shaped structure allows the control element 8 to fit tightly against the top of the pressure gauge 4, forming a stable wrapping grip on the pressure gauge 4 during tightening. Furthermore, the inner surface of the control element 8 is made of a flexible and wear-resistant material, which not only avoids squeezing damage to the top of the pressure gauge 4 but also enhances the friction between the control element 8 and the pressure gauge 4, further improving the efficiency of the control element 8 in driving the rotation of the pressure gauge 4.

[0032] In one embodiment of the present invention, the receiving component includes a fixed box 16; the fixed box 16 has an opening at its top; a movable box 17 is slidably connected inside the fixed box 16; a set of springs 18 are evenly distributed between the movable box 17 and the fixed box 16; a connecting ring 19 is fixedly connected to the middle of the movable box 17; and a mating ring 20 is rotatably connected inside the connecting ring 19.

[0033] When the control component 8 drives the pressure gauge 4 to slowly descend and rotate, the pressure gauge 4 can drive the movable box 17 to move downward inside the fixed box 16, so that the threaded post at the bottom of the pressure gauge 4 can be smoothly screwed into the detection sleeve 11. When the pressure gauge 4 rotates, it can drive the mating ring 20 to rotate inside the connecting ring 19, further reducing the resistance between the pressure gauge 4 and the movable box 17. After the test is completed, as the pressure gauge 4 rises, the spring 18 drives the movable box 17 to return to its original position inside the fixed box 16.

[0034] The top of the mating ring 20 is fixedly connected to a support frame 21, and the support frame 21 is adapted to the shape of the bottom of the pressure gauge 4. The support frame 21 can provide stable support for the bottom of the pressure gauge 4, preventing the pressure gauge 4 from shaking or tilting due to uneven force during conveying and tightening.

[0035] In one embodiment of the present invention, a mounting block 22 is fixedly connected inside the detection sleeve 11, and the air inlet 12 is located above the mounting block 22, and there is a gap between the mounting block 22 and the detection sleeve 11; an elastic corrugated pipe 23 is fixedly connected to the upper side of the mounting block 22; a lifting plate block 24 is fixedly connected to the top of the corrugated pipe 23; a set of air holes 25 are evenly distributed inside the lifting plate block 24, and the air holes 25 communicate with the inside of the corrugated pipe 23.

[0036] Because the pressure gauge 4 and the detection sleeve 11 are frequently tightened, their threads rub and scrape against each other, easily forming metal shavings that remain on the inner threads of the detection sleeve 11. This metal shavings may reduce the airtightness of the connection when the sleeve is connected to the pressure gauge 4. Therefore, this device uses a mounting block 22, a bellows 23, and a lifting plate 24. When the threaded post at the bottom of the pressure gauge 4 enters the detection sleeve 11, the threaded post will press down on the lifting plate 24, causing the bellows 23 to contract. At this time, the gas inside the bellows 23 is ejected to the side through the air holes 25 of the lifting plate 24, forming an airflow that washes over the detection sleeve 11. The inner threaded area blows away residual metal shavings from the threaded surface, preventing them from affecting the airtightness between the pressure gauge 4 and the detection sleeve 11 during subsequent connection, thus ensuring the accuracy of the test results. The lifting plate 24 remains in contact with the bottom of the threaded post during the screwing process and continues to descend as the threaded post is screwed in until it is fully tightened. At this point, the bellows 23 is in its maximum contraction state, and the air jet from the air hole 25 continues throughout the entire connection process, effectively removing residual metal shavings from threads of different depths. Afterward, air is supplied to the inside of the detection sleeve 11 through the air supply pipe 13 to test the movement.

[0037] A vent plate 26 is fixedly connected to the upper side of the lifting plate 24; the vent plate 26 is made of mesh material. The mesh structure of the vent plate 26 allows airflow to pass smoothly and also provides some support to the bottom of the threaded column of the pressure gauge 4, preventing the lifting plate 24 from blocking the threaded column and ensuring that the airflow can reach the mechanism smoothly during inflation.

[0038] A set of slag collection grooves 27 are evenly distributed on the side of the mounting block 22; a sealing cover 28 is detachably connected to the bottom of the detection sleeve 11; a storage cavity 29 is formed between the mounting block 22 and the sealing cover 28.

[0039] Metal shavings washed down from the inner wall of the detection sleeve 11 by the airflow can fall into the storage chamber 29 below through the slag collection trough 27 for preliminary collection of metal shavings. This prevents metal shavings from entering the pressure gauge 4 with the airflow during the subsequent inflation process and causing damage. The storage chamber 29 provides a centralized storage space for metal shavings. After the detection work is completed or periodically, the sealing cover 28 can be removed to facilitate the operator to clean the metal shavings accumulated in the storage chamber 29.

[0040] In one embodiment of the present invention, an inclined guide vane 30 is fixedly connected to the inner side of the detection sleeve 11 at the position corresponding to the air inlet 12.

[0041] By setting the guide vane 30, the airflow entering the detection sleeve 11 through the air inlet 12 during inflation can be guided, so that it moves directly upward along the surface of the guide vane 30, reducing the interference of the airflow on the metal shavings in the storage chamber 29, and preventing the collected metal shavings from being carried away and raised by the airflow and carried into the pressure gauge 4.

[0042] An inclined baffle 31 is fixedly connected between the top of the guide vane 30 and the detection sleeve 11; a triangular cavity is formed between the guide vane 30, the baffle 31 and the detection sleeve 11; a through groove 32 is opened on the surface of the baffle 31; an elastic piece 33 is provided on the upper side of the through groove 32, and the top of the elastic piece 33 is fixedly connected to the baffle 31.

[0043] When the air vent 25 sprays air, the metal shavings washed off the inner wall of the detection sleeve 11 can continue to fall into the storage cavity 29 along the inclined surfaces of the baffle 31 and the elastic plate 33. Since the elastic plate 33 blocks the through groove 32, the metal shavings will not enter the triangular cavity through the through groove 32. When the air is filled, the airflow enters the triangular cavity from the air inlet 12. The airflow can push the elastic plate 33 open, causing the elastic plate 33 to deflect upward, so that the airflow can smoothly enter the detection sleeve 11 through the through groove 32. This structure can guide the airflow and prevent the airflow from affecting the metal shavings in the storage cavity 29. It can also prevent the metal shavings from being difficult to clean when they fall downward and remain between the guide plate 30 and the air inlet 12, thus improving the collection efficiency of metal shavings.

[0044] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0045] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A testing device for a pressure gauge movement, characterized in that: Includes a conveyor (1) and a frame (2); The conveyor (1) transmits pressure gauges (4) to be tested and those that have been tested via the conveyor belt (3); a set of receiving components for placing the pressure gauges (4) are evenly distributed on the surface of the conveyor belt (3); An electric telescopic rod (5) is fixedly connected to the top of the frame (2); the output end of the electric telescopic rod (5) is connected to a mounting base one (6); a servo motor (7) is fixedly connected inside the mounting base one (6); a control component (8) is connected to the output end of the servo motor (7); a mounting base two (9) is fixedly connected to the side of the mounting base one (6) via a connecting rod; a vision sensor (10) is fixedly connected inside the mounting base two (9). The bottom of the frame (2) is fixedly connected to a detection sleeve (11) by a connecting rod; the detection sleeve (11) is located inside the conveyor (1) at the position below the top conveyor belt (3); the inner side of the top of the detection sleeve (11) is provided with a thread that mates with a pressure gauge (4); an air inlet (12) is provided on one side of the detection sleeve (11); the air inlet (12) is connected to an air supply pipe (13), and the air supply pipe (13) is connected to an air source device.

2. The pressure gauge movement testing device according to claim 1, characterized in that: An electric control valve (14) is provided on the gas supply pipe (13); a pressure sensor (15) is provided on one side of the detection sleeve (11).

3. The pressure gauge movement testing device according to claim 1, characterized in that: The control element (8) is designed as an arc-shaped structure that fits the shape of the top of the pressure gauge (4).

4. The pressure gauge movement testing device according to claim 1, characterized in that: The receiving component includes a fixed box (16); the fixed box (16) has an opening at the top; a movable box (17) is slidably connected inside the fixed box (16); a set of springs (18) are evenly distributed between the movable box (17) and the fixed box (16); a connecting ring (19) is fixedly connected to the middle of the movable box (17); a mating ring (20) is rotatably connected inside the connecting ring (19).

5. The pressure gauge movement testing device according to claim 4, characterized in that: The top of the fitting ring (20) is fixedly connected to a support frame (21), and the support frame (21) is adapted to the bottom shape of the pressure gauge (4).

6. The pressure gauge movement testing device according to claim 1, characterized in that: The detection sleeve (11) is fixedly connected to an installation block (22), and the air inlet (12) is located above the installation block (22); an elastic corrugated pipe (23) is fixedly connected to the upper side of the installation block (22); a lifting plate (24) is fixedly connected to the top of the corrugated pipe (23); a set of air holes (25) are evenly distributed inside the lifting plate (24), and the air holes (25) are connected to the inside of the corrugated pipe (23).

7. The pressure gauge movement testing device according to claim 6, characterized in that: A breathable plate (26) is fixedly connected to the upper side of the lifting plate (24); the breathable plate (26) is made of mesh material.

8. The pressure gauge movement testing device according to claim 7, characterized in that: A set of slag collection grooves (27) are evenly distributed on the side of the mounting block (22); a sealing cover (28) is provided at the bottom of the detection sleeve (11); a storage cavity (29) is formed between the mounting block (22) and the sealing cover (28).

9. The pressure gauge movement testing device according to claim 8, characterized in that: An inclined guide vane (30) is fixedly connected to the inner side of the detection sleeve (11) at the position corresponding to the air inlet (12).

10. A testing device for a pressure gauge movement according to claim 9, characterized in that: An inclined baffle (31) is fixedly connected between the top of the guide plate (30) and the detection sleeve (11); a triangular cavity is formed between the guide plate (30), the baffle (31) and the detection sleeve (11); a through groove (32) is opened on the surface of the baffle (31); an elastic piece (33) is provided on the upper side of the through groove (32), and the top of the elastic piece (33) is fixedly connected to the baffle (31).

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