Air tightness detection equipment for pressure gauge processing

Abstract

An air tightness detection device for pressure gauge processing disclosed by the present invention comprises a detection box and a pressure gauge main body, the detection box is rotatably provided with a detection plate, the detection plate is provided with a plurality of pneumatic clamps, the detection box is provided with a detection assembly, the detection assembly comprises a lifting plate, the lifting plate can move up and down, and the outer side of the lifting plate is provided with a plurality of glass cylinders. A plurality of water tanks are further arranged on the outer side of the lifting plate, gas sensitive sensors are installed on the water tanks, and the air tightness detection equipment for pressure gauge machining is remarkable in advantage. During detection, mixed gas of nitrogen and water vapor is introduced, the water vapor can be attached to the glass cylinder due to leakage, a leakage point can be visually positioned, the maintenance efficiency and accuracy are improved, the troubleshooting time is shortened, and the secondary damage risk is reduced; the water tank and the gas-sensitive sensor are adopted for dual detection, the water tank visually shows leakage, and the gas-sensitive sensor captures trace leakage signals; sensitivity is high and reliability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure gauge production and processing, and in particular to an air tightness detection device for pressure gauge processing. Background Art

[0002] Pressure gauges, a core component of industrial measuring instruments, convert pressure into pointer displacement through the deformation of elastic elements (such as spring tubes). They are widely used in the chemical, energy, and machinery industries. Their production process involves multiple precision steps: Raw materials are selected from high-strength metals such as brass and alumina. The dial is punched and laser-calibrated before being assembled with the gear train. The key spring tube component is formed using a bending machine and tested for leak tightness using a leak detector. The case is machined using a CNC lathe, sprayed with an anti-corrosion coating, and filled with glycerin to cushion vibrations.

[0003] The air tightness test of the pressure gauge needs to cover key links such as the joints, case, elastic elements and liquid filling parts. The air tightness test of the pressure gauge plays an important role in ensuring measurement accuracy and reliability, preventing safety hazards, optimizing production efficiency and cost control, and adapting to special working conditions. During the test, the pressure gauge senses pressure changes through the elastic element. If there is a leak, the internal pressure cannot be stably transmitted to the pointer mechanism, resulting in reading deviation.

[0004] The detection methods of some existing air tightness detection devices are relatively simple and it is not easy to detect multiple items at the same time. Most detection devices use gas-sensitive detection, positive or negative pressure, bubble detection and other detection methods. When the detection device is damaged, a single detection method is not easy to guarantee the accuracy of the detection. In addition, in terms of leak location, many devices can only complete the overall air tightness detection, that is, to determine whether there is a leak in the product, but cannot accurately point out the specific location of the leak. When a leak is detected in the product, maintenance personnel need to spend a lot of time and energy to check various parts of the product, which reduces production efficiency. Therefore, in order to solve the above problems, an air tightness detection device for pressure gauge processing is proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an air tightness detection device for pressure gauge processing.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An air tightness testing device for pressure gauge processing, comprising a testing box and a pressure gauge body, wherein a testing plate is rotatably provided on the testing box, and a plurality of pneumatic clamps are mounted on the testing plate, and the pneumatic clamps are used to clamp the pressure gauge body; The detection box is provided with a detection component, which includes a lifting plate that can move up and down. A plurality of glass cylinders are provided on the outside of the lifting plate. A plurality of water tanks are also provided on the outside of the lifting plate. A gas sensor is installed on the water tank. A conduit is fixedly connected between the glass cylinder and the water tank. The glass cylinder is used to detect the specific leakage position of the pressure gauge body. The water tank and the gas sensor are used for bubble detection and gas detection of the pressure gauge body.

[0007] The above technical solution further includes: A rotating ring is rotatably connected to the detection box, and the rotating ring is fixedly connected to the detection plate. An air inlet is installed at one end of the pneumatic clamp extending to the bottom of the detection plate.

[0008] A transmission assembly is provided inside the detection box, and the transmission assembly includes a driving motor installed at the bottom of the detection box, a reciprocating screw is fixedly connected to the output end of the driving motor, the reciprocating screw is rotationally connected to the detection box, the reciprocating screw is threadedly connected to the lifting plate, and guide rods fixedly connected to the detection box are symmetrically slidingly provided on the lifting plate, a slide rail is fixedly connected to the top of the detection box, the slide rail and the lifting plate slide relatively, and the slide rail is rotationally connected to the reciprocating screw.

[0009] The inside of the detection box is also rotatably connected to a transmission shaft, and the outside of the transmission shaft is respectively fixedly connected to a half-side gear and a second reduction gear. The outside of the reciprocating screw is fixedly connected to a driving gear, and the driving gear and the second reduction gear are engaged with each other. The inside of the detection box is also rotatably connected to a transmission rod, and the outside of the transmission rod is fixedly connected to a first reduction gear, and the first reduction gear and the half-side gear are engaged with each other. The top of the transmission rod is fixedly connected to the detection plate.

[0010] The side of the lifting plate is fixedly connected to multiple mounting platforms, the mounting platforms are fixedly connected to the glass cylinder, the bottom of the lifting plate close to the mounting platform is fixedly connected to the mounting plate, and the sides of the multiple mounting platforms away from the mounting plate are commonly fixedly connected to a support plate.

[0011] A scraping assembly is provided on the mounting platform. The scraping assembly includes a first mounting bracket fixedly connected to the mounting platform. A scraping motor is installed inside the first mounting bracket. A sprocket is fixedly connected to the output end of the scraping motor.

[0012] A bearing plate is installed on the top of the mounting platform, and the bearing plate is located at the top of the glass cylinder. A rotating shaft is rotatably connected to the center of the bearing plate, and a sprocket is fixedly connected to the top of the rotating shaft. One end of the rotating shaft extending to the inner side of the glass cylinder is fixedly connected to a scraping plate, and the scraping plate is in contact with the inner wall of the glass cylinder. A scraping chain is sleeved and connected between the multiple sprockets.

[0013] The mounting plate is provided with a sealing assembly, which includes a second mounting bracket fixedly connected to the mounting plate, a sealed motor is mounted inside the second mounting bracket, and a sealed sprocket is fixedly connected to the output end of the sealed motor.

[0014] A plurality of bidirectional screw rods are rotatably connected between the mounting plate and the support plate. The bidirectional screw rods extend to the outside of the mounting plate and are fixedly connected to a sealing sprocket at one end close to the sealing motor. A sealing chain is sleeved and connected between the plurality of sealing sprockets. The positive and negative threads of the plurality of bidirectional screw rods are respectively threadedly connected to a first sealing ring and a second sealing ring.

[0015] An air outlet is installed on the top of the water tank, and a sealing plug is installed on the inner bottom of the glass cylinder.

[0016] The present invention has the following beneficial effects: In the present invention, during the detection process, a mixture of nitrogen and water vapor is introduced into the main body of the pressure gauge. When there is a leak in the pressure gauge, the water vapor will adhere to the glass tube from the leak point of the pressure gauge, and the position where the bubbles are generated can be visually observed, thereby accurately locating the leak point, avoiding the problem of difficulty in determining the specific leak position in traditional detection methods, greatly improving maintenance efficiency and accuracy, reducing troubleshooting time, and reducing the risk of further damage caused by long-term troubleshooting.

[0017] The device uses a dual detection method combining a water tank and a gas sensor. The water tank is used for bubble detection, which can visually detect leaks. The gas sensor can sensitively detect specific gases. Even if the leak is extremely small or the leaking gas is difficult to detect, the gas sensor can capture the signal change, improving the sensitivity and reliability of the detection and ensuring that the pressure gauge meets the airtightness requirements.

[0018] In the present invention, the detection plate is driven to rotate and the glass cylinder is driven to move up and down by the transmission component. Multiple pneumatic clamps can simultaneously clamp multiple pressure gauge bodies for detection, realizing batch detection, greatly improving detection efficiency, adapting to the needs of large-scale production lines, and helping to shorten the production cycle and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an air tightness detection device for pressure gauge processing proposed by the present invention; Figure 2 Schematic diagram of the transmission assembly structure in the present invention; Figure 3 Schematic diagram of the bottom structure of the detection board in the present invention; Figure 4 This is a schematic diagram of the front view structure of the detection component in the present invention; Figure 5This is a schematic diagram of the rear view structure of the detection component in the present invention; Figure 6 Schematic diagram of the sealing component and scraping component structure of the present invention; Figure 7 Schematic diagram of the internal structure of the glass cylinder in the present invention.

[0020] Figure: 1. Test box; 2. Lifting plate; 3. Test plate; 4. Mounting platform; 5. Mounting plate; 6. First mounting bracket; 7. Pressure gauge body; 20. Slide rail; 21. Guide rod; 22. Driving gear; 23. First reduction gear; 24. Transmission rod; 25. Transmission shaft; 26. Half gear; 27. Second reduction gear; 28. Reciprocating screw; 29. ​​Driving motor; 30. Rotating ring; 31. Air inlet; 32. Pneumatic clamp; 40 , glass cylinder; 400, sealing plug; 41, water tank; 42, gas sensor; 43, air outlet; 44, conduit; 50, sealing sprocket; 51, sealing chain; 52, second mounting bracket; 53, sealing motor; 54, bidirectional screw; 55, first sealing ring; 56, second sealing ring; 57, support plate; 60, scraper motor; 61, scraper chain; 62, scraper sprocket; 63, rotating shaft; 64, scraper plate; 65, bearing plate; DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example like Figure 1-Figure 7 As shown, the present invention proposes an airtightness testing device for pressure gauge processing, comprising a testing box 1 and a pressure gauge body 7. A testing plate 3 is rotatably provided on the testing box 1, and a plurality of pneumatic clamps 32 are mounted on the testing plate 3. The pneumatic clamps 32 are used to clamp the pressure gauge body 7. The detection box 1 is provided with a detection assembly, which includes a lifting plate 2 that can move up and down. A plurality of glass cylinders 40 are provided on the outside of the lifting plate 2. A plurality of water tanks 41 are also provided on the outside of the lifting plate 2. A gas sensor 42 is installed on the water tank 41. The glass cylinder 40 is used to detect the specific leakage position of the pressure gauge body 7. The water tank 41 and the gas sensor 42 are used for bubble detection and gas detection of the pressure gauge body 7. Furthermore, this design realizes automatic detection of the pressure gauge body 7 through the reciprocating rotation of the detection plate 3 and the up and down movement of the lifting plate 2. After the pneumatic clamp 32 clamps the pressure gauge body 7, the contact between it and the pressure gauge body 7 is completely sealed, and then a mixed gas of water vapor and nitrogen is introduced into the pressure gauge body 7. By utilizing the principle of pre-cooling and liquefaction of water vapor, when the pressure gauge body 7 leaks, water droplets will form on the glass surface corresponding to the leak, which is convenient for staff to observe. At the same time, the water tank 41 and the gas sensor 42 are used for bubble detection and gas sensitive detection of the pressure gauge body 7, further improving the accuracy and visualization of the detection.

[0023] The detection box 1 is rotatably connected to a rotating ring 30, which is fixedly connected to the detection plate 3. The pneumatic clamp 32 extends to one end of the bottom of the detection plate 3 and is equipped with an air inlet 31. Furthermore, the detection plate 3 is mounted on the rotating ring 30 , and the air inlet 31 is used to introduce a mixed gas of water vapor and nitrogen when detecting the air tightness of the pressure gauge body 7 .

[0024] A transmission assembly is provided inside the detection box 1. The transmission assembly includes a drive motor 29 installed at the bottom of the detection box 1. A reciprocating screw 28 is fixedly connected to the output end of the drive motor 29. The reciprocating screw 28 is rotationally connected to the detection box 1. The reciprocating screw 28 is threadedly connected to the lifting plate 2. A guide rod 21 fixedly connected to the detection box 1 is symmetrically slidably provided on the lifting plate 2. A slide rail 20 is fixedly connected to the top of the detection box 1. The slide rail 20 slides relatively with the lifting plate 2 and is rotationally connected to the reciprocating screw 28. The inside of the detection box 1 is also rotatably connected to a transmission shaft 25, and the outside of the transmission shaft 25 is fixedly connected to a half gear 26 and a second reduction gear 27. The outside of the reciprocating screw 28 is fixedly connected to a driving gear 22, and the driving gear 22 and the second reduction gear 27 are meshed with each other. The inside of the detection box 1 is also rotatably connected to a transmission rod 24, and the outside of the transmission rod 24 is fixedly connected to a first reduction gear 23, and the first reduction gear 23 and the half gear 26 are meshed with each other. The top of the transmission rod 24 is fixedly connected to the detection plate 3; Furthermore, when the detection starts, the drive motor 29 is started, and its output end drives the reciprocating screw 28 to rotate at the bottom of the detection box 1. Since the reciprocating screw 28 is threadedly connected to the lifting plate 2, and the lifting plate 2 is symmetrically slidingly provided with a guide rod 21 fixedly connected to the detection box 1, under the guiding action of the guide rod 21, the rotation of the reciprocating screw 28 will cause the lifting plate 2 to move up and down along the guide rod 21. At the same time, the lifting plate 2 and the slide rail 20 on the top of the detection box 1 slide relative to each other. The slide rail 20 plays a role in auxiliary guidance and stabilizing the movement of the lifting plate 2, ensuring that the lifting plate 2 moves vertically smoothly, thereby driving the detection components such as the glass cylinder 40 and the water tank 41 set on the outside of the lifting plate 2 to be adjusted to a suitable height.

[0025] As reciprocating screw 28 rotates, the driving gear 22 fixed to its outer side also rotates. This meshes with the second reduction gear 27 on the outer side of the transmission shaft 25, thereby driving the transmission shaft 25 to rotate. As the transmission shaft 25 rotates, the half gear 26 and the second reduction gear 27 fixed to its outer side rotate together. The half gear 26 meshes with the first reduction gear 23 on the outer side of the transmission rod 24. Because the half gear 26 has only partial teeth, when the toothed portion meshes with the first reduction gear 23, it drives the first reduction gear 23 to rotate, thereby rotating the transmission rod 24. When the half gear 26 reaches the toothless portion, it disengages from the first reduction gear 23, and the first reduction gear 23 and transmission rod 24 stop rotating. This intermittent engagement of the half gear 26 with the first reduction gear 23 enables intermittent rotation of the transmission rod 24. Because the top of the transmission rod 24 is fixedly connected to the detection plate 3, the intermittent rotation of the transmission rod 24 will drive the intermittent rotation of the detection plate 3, and then the pressure gauge body 7 clamped by the multiple pneumatic clamps 32 installed on the detection plate 3 will rotate intermittently. In this way, during the detection process, it can be ensured that each pressure gauge body 7 has enough time to perform various detection operations during the detection, thereby ensuring the accuracy and completeness of the detection.

[0026] Furthermore, the above process is specifically as follows: first, the driving motor 29 drives the lifting plate 2 to reciprocate through the reciprocating screw 28. When the driving motor 29 drives the lifting plate 2 to move to the top of the slide rail 20, the driving motor 29 stops and then changes to a rotating state, so that the lifting plate 2 moves downward. At this time, the detection plate 3 is intermittently rotated by the rotation ratio between the driving gear 22 and the second reduction gear 27, and the transmission ratio between the half gear 26 and the first reduction gear 23; Specifically, when the lifting plate 2 is located at the top of the slide rail 20, the driving motor 29 stops rotating. At this time, the pressure gauge bodies 7 placed in a row on the detection plate 3 have just completed the detection, and this row of pressure gauges is just located on the side away from the lifting plate 2. The pressure gauge bodies 7 in a row close to the lifting plate 2 are in an undetected state. At this time, the staff removes the pressure gauge bodies 7 that have completed the detection and replaces the undetected pressure gauge bodies 7. Then, the driving motor 29 rotates to drive the lifting plate 2 to move downward. At this time, the setting between the half gear 26 and the first reduction gear 23 is not engaged. When the lifting plate 2 moves downward and drives the glass cylinder 40 to cover the pressure gauge bodies 7, the half gear 26 and the first reduction gear 23 become engaged, and the pressure gauge bodies 7 are tested for air tightness. Furthermore, after the pressure gauge body 7 completes the air tightness test, the drive motor 29 reverses, and the half gear 26 and the first reduction gear 23 change from meshing to non-meshing. At this time, the detection plate 3 does not rotate. Due to the particularity of the design of the reciprocating screw 28, the lifting plate 2 moves upward from the bottom at this time. When the glass tube is away from the pressure gauge body 7, the half gear 26 and the first reduction gear 23 are meshed again, and the drive motor 29 drives the first reduction gear 23 to reverse. Due to the special design of the half gear 26, the detection plate 3 rotates intermittently until it rotates 180°. At this time, the lifting plate 2 is at the top of the reciprocating screw 28, and the detection is performed reciprocatingly to realize automatic detection.

[0027] Multiple mounting platforms 4 are fixedly connected to the side of the lifting plate 2, and the mounting platforms 4 are fixedly connected to the glass tube 40. A mounting plate 5 is fixedly connected to the bottom of the lifting plate 2 close to the mounting platform 4, and a support plate 57 is fixedly connected to the side of multiple mounting platforms 4 away from the mounting plate 5.

[0028] A scraping assembly is provided on the mounting platform 4 , and the scraping assembly includes a first mounting frame 6 fixedly connected to the mounting platform 4 , a scraping motor 60 is mounted inside the first mounting frame 6 , and a sprocket 62 is fixedly connected to the output end of the scraping motor 60 .

[0029] A bearing plate 65 is installed on the top of the mounting platform 4. The bearing plate 65 is located at the top of the glass tube 40. A rotating shaft 63 is rotatably connected to the center of the bearing plate 65. A sprocket 62 is fixedly connected to the top of the rotating shaft 63. One end of the rotating shaft 63 extending to the inner side of the glass tube 40 is fixedly connected to a scraper plate 64. The scraper plate 64 is in contact with the inner wall of the glass tube 40. A scraper chain 61 is sleeved and connected between the multiple sprockets 62.

[0030] Furthermore, when residual water droplets form on the inner wall of the glass tube 40 due to leakage from the pressure gauge body 7, it is necessary to scrape and clean them to prevent them from affecting the next experimental results. At this time, the scraper motor 60 installed on the inner side of the first mounting bracket 6 is started, and the output end of the scraper motor 60 begins to rotate, driving the sprocket 62 fixedly connected to it. At the same time, the bearing plate 65 installed on the top of the mounting platform 4 is located at the top of the glass tube 40, providing support and rotation guidance. The top of the rotating shaft 63 rotatably connected at the center of the bearing plate 65 is also fixedly connected to a sprocket 62. The multiple sprockets 62 are connected by a scraper chain 61, forming a chain transmission structure.

[0031] Furthermore, after the scraper motor 60 is started, the sprocket 62 at its output end rotates, and through the transmission of the scraper chain 61, the sprocket 62 at the top of the rotating shaft 63 is driven to rotate together, thereby causing the rotating shaft 63 to rotate under the support of the bearing plate 65. The end of the rotating shaft 63 extending to the inside of the glass tube 40 is fixedly connected to a scraper plate 64, and the scraper plate 64 is in contact with the inner wall of the glass tube 40. As the rotating shaft 63 rotates, the scraper plate 64 also rotates. During the rotation process, the scraper plate 64 is in close contact with the inner wall of the glass tube 40 and generates relative motion, thereby scraping away any liquid that may remain on the inner wall of the glass tube 40. This prevents the accuracy and observation effect of the subsequent pressure gauge air tightness test affected by residue. At the same time, the scraper assembly has a simple structure and stable operation, and can adapt to the needs of long-term and frequent cleaning work.

[0032] A sealing assembly is provided on the mounting plate 5, and the sealing assembly includes a second mounting bracket 52 fixedly connected to the mounting plate 5, a sealing motor 53 is mounted inside the second mounting bracket 52, and a sealing sprocket 50 is fixedly connected to the output end of the sealing motor 53; A plurality of bidirectional screw rods 54 are rotatably connected between the mounting plate 5 and the support plate 57. The bidirectional screw rods 54 extend to the outside of the mounting plate 5 and are fixedly connected to a sealing sprocket 50 at one end close to the sealing motor 53. A sealing chain 51 is sleeved and connected between the plurality of sealing sprockets 50. The forward and reverse threads of the plurality of bidirectional screw rods 54 are respectively threadedly connected to a first sealing ring 55 and a second sealing ring 56. Furthermore, when the pressure gauge body 7 needs to be sealed for airtightness testing, the contact between the glass cylinder 40 and the pneumatic clamp 32 needs to be sealed. The sealing motor 53 mounted inside the second mounting bracket 52 is activated, and the output end of the sealing motor 53 begins to rotate, driving the sealing sprocket 50 fixedly connected to it. Simultaneously, multiple bidirectional screws 54 are rotatably connected between the mounting plate 5 and the support plate 57. These bidirectional screws 54 extend to the outside of the mounting plate 5 and are also fixedly connected to the sealing sprocket 50 at one end near the sealing motor 53. These sealing sprockets 50 are connected by a sealing chain 51, forming a chain drive structure. Furthermore, after the sealing motor 53 is started, the sealing sprocket 50 at its output end rotates, which, through the transmission of the sealing chain 51, drives the sealing sprockets 50 at the ends of each bidirectional screw rod 54 to rotate together, thereby achieving synchronous rotation of the multiple bidirectional screw rods 54 between the mounting plate 5 and the support plate 57. Because the forward and reverse threads of the multiple bidirectional screw rods 54 are respectively threadedly connected to the first sealing ring 55 and the second sealing ring 56, when the bidirectional screw rods 54 rotate, according to the principle of thread transmission, the first sealing ring 55 and the second sealing ring 56 will move relative to or away from each other along the axial direction of the bidirectional screw rod 54; Furthermore, specifically, when the bidirectional screw 54 rotates forward, the first sealing ring 55 and the second sealing ring 56 will approach each other along the bidirectional screw 54, gradually approaching the contact point between the glass tube 40 and the pneumatic clamp 32; when the bidirectional screw 54 rotates reversely, the first sealing ring 55 and the second sealing ring 56 will move away from each other along the bidirectional screw 54, leaving the contact point between the glass tube 40 and the pneumatic clamp 32. By controlling the forward and reverse rotation of the sealing motor 53, the movement of the first sealing ring 55 and the second sealing ring 56 can be accurately controlled to achieve the sealing and loosening operations of the connection part of the pressure gauge body 7. When the first sealing ring 55 and the second sealing ring 56 approach each other and fit tightly against the contact point between the glass tube 40 and the pneumatic clamp 32, a reliable sealing environment can be formed to prevent gas leakage during the detection process and ensure the accuracy of the airtightness detection; Furthermore, when the test is completed, the sealing motor 53 is controlled to reverse, so that the first sealing ring 55 and the second sealing ring 56 move away from each other, loosening the contact between the glass tube 40 and the pneumatic clamp 32, making it easier to remove the pressure gauge body 7 for subsequent operations.

[0033] A conduit 44 is fixedly connected between the glass cylinder 40 and the water tank 41. An air outlet 43 is installed on the top of the water tank 41. A sealing plug 400 is installed on the inner bottom of the glass cylinder 40. Furthermore, when the pressure gauge body 7 leaks, the water vapor and nitrogen in the mixed gas will enter the water tank 41 from the conduit 44, and the water vapor will melt in the water in the water tank 41. When the pressure gauge body 7 leaks a large amount, bubbles will be generated. Since nitrogen is insoluble in water, it will be detected by the gas sensor 42 and send a signal. Then the nitrogen enters the circulation equipment again through the outlet port 43, and when it is detected again, it will enter the pressure gauge body 7 through the air inlet 31.

[0034] In this embodiment, during testing, the drive motor 29 is activated, driving the reciprocating screw 28 to rotate. Guided by the guide rod 21 and the slide rail 20, the lifting plate 2 moves up and down, driving the glass cylinder 40 and the water tank 41 to adjust their heights. Simultaneously, the driving gear 22 on the reciprocating screw 28 rotates the transmission shaft 25. The half gear 26 on the outer side of the transmission shaft 25 intermittently meshes with the first reduction gear 23 on the outer side of the transmission rod 24, causing the transmission rod 24 to rotate intermittently. This, in turn, drives the testing plate 3 to rotate intermittently, causing the pressure gauge body 7 held by the pneumatic clamp 32 to rotate intermittently, thus achieving automated testing.

[0035] When water droplets remain on the inner wall of the glass tube 40 , the scraping motor 60 is started to drive the sprocket 62 to rotate, which is then transmitted through the scraping chain 61 to rotate the rotating shaft 63 , thereby driving the scraping plate 64 to rotate and scrape the residual liquid on the inner wall of the glass tube 40 .

[0036] During testing, the sealing motor 53 is started to drive the sealing sprocket 50 to rotate, and the sealing chain 51 is transmitted to make multiple bidirectional screws 54 rotate synchronously. The first sealing ring 55 and the second sealing ring 56 on the bidirectional screw 54 move relative to or opposite to each other, thereby achieving sealing and loosening of the contact point between the glass tube 40 and the pneumatic clamp 32.

[0037] When the pressure gauge body 7 leaks, the mixed gas enters the water tank 41 through the conduit 44, the water vapor dissolves in water, and the nitrogen does not dissolve in water and is detected by the gas sensor 42, which sends a signal. The nitrogen then enters the circulation equipment through the gas outlet 43.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing device for pressure gauge processing, comprising a testing box (1) and a pressure gauge body (7), characterized in that: A detection plate (3) is rotatably provided on the detection box (1), and a plurality of pneumatic clamps (32) are mounted on the detection plate (3), and the pneumatic clamps (32) are used to clamp the pressure gauge body (7); The detection box (1) is provided with a detection assembly, which includes a lifting plate (2), the lifting plate (2) being movable up and down, a plurality of glass cylinders (40) being provided on the outside of the lifting plate (2), a plurality of water tanks (41) being further provided on the outside of the lifting plate (2), a gas sensor (42) being installed on the water tank (41), the glass cylinder (40) being used to detect a specific leakage position of the pressure gauge body (7), and the water tank (41) and the gas sensor (42) being used for bubble detection and gas detection of the pressure gauge body (7).

2. The air tightness detection equipment for pressure gauge processing according to claim 1, characterized in that: A rotating ring (30) is rotatably connected to the detection box (1), and the rotating ring (30) is fixedly connected to the detection plate (3). An air inlet (31) is installed at one end of the pneumatic clamp (32) extending to the bottom of the detection plate (3).

3. The airtightness detection equipment for pressure gauge processing according to claim 2, characterized in that: A transmission assembly is provided inside the detection box (1), and the transmission assembly includes a driving motor (29) installed at the bottom of the detection box (1); the output end of the driving motor (29) is fixedly connected to a reciprocating screw (28); the reciprocating screw (28) is rotationally connected to the detection box (1); the reciprocating screw (28) is threadedly connected to the lifting plate (2); a guide rod (21) fixedly connected to the detection box (1) is symmetrically slidably provided on the lifting plate (2); a slide rail (20) is fixedly connected to the top of the detection box (1); the slide rail (20) slides relatively with the lifting plate (2); and the slide rail (20) is rotationally connected to the reciprocating screw (28).

4. The airtightness detection equipment for pressure gauge processing according to claim 3, characterized in that: The inside of the detection box (1) is also rotatably connected to a transmission shaft (25), and the outside of the transmission shaft (25) is fixedly connected to a half-side gear (26) and a second reduction gear (27), and the outside of the reciprocating screw (28) is fixedly connected to a driving gear (22), and the driving gear (22) and the second reduction gear (27) are meshed with each other. The inside of the detection box (1) is also rotatably connected to a transmission rod (24), and the outside of the transmission rod (24) is fixedly connected to a first reduction gear (23), and the first reduction gear (23) and the half-side gear (26) are meshed with each other. The top of the transmission rod (24) is fixedly connected to the detection plate (3).

5. The airtightness detection equipment for pressure gauge processing according to claim 1, characterized in that: A plurality of mounting platforms (4) are fixedly connected to the side of the lifting plate (2), the mounting platforms (4) are fixedly connected to the glass cylinder (40), a mounting plate (5) is fixedly connected to the bottom of the lifting plate (2) on the side close to the mounting platform (4), and a support plate (57) is fixedly connected to the side of the plurality of mounting platforms (4) away from the mounting plate (5).

6. The airtightness testing equipment for pressure gauge processing according to claim 5, characterized in that: A scraping assembly is provided on the mounting platform (4), the scraping assembly comprising a first mounting frame (6) fixedly connected to the mounting platform (4), a scraping motor (60) being mounted inside the first mounting frame (6), and a sprocket (62) being fixedly connected to the output end of the scraping motor (60).

7. The airtightness testing equipment for pressure gauge processing according to claim 6, characterized in that: A bearing plate (65) is installed on the top of the mounting platform (4), and the bearing plate (65) is located on the top of the glass cylinder (40). A rotating shaft (63) is rotatably connected to the center of the bearing plate (65), and a sprocket (62) is fixedly connected to the top of the rotating shaft (63). One end of the rotating shaft (63) extending to the inner side of the glass cylinder (40) is fixedly connected to a scraping plate (64), and the scraping plate (64) is in contact with the inner wall of the glass cylinder (40). A scraping chain (61) is sleeved and connected between the plurality of sprockets (62).

8. The airtightness testing equipment for pressure gauge processing according to claim 5, characterized in that: A sealing assembly is provided on the mounting plate (5), the sealing assembly comprising a second mounting frame (52) fixedly connected to the mounting plate (5), a sealed motor (53) being mounted inside the second mounting frame (52), and a sealed sprocket (50) being fixedly connected to the output end of the sealed motor (53).

9. The airtightness detection equipment for pressure gauge processing according to claim 8, characterized in that: A plurality of bidirectional screw rods (54) are rotatably connected between the mounting plate (5) and the support plate (57); one end of the bidirectional screw rods (54) extending to the outside of the mounting plate (5) and close to the sealing motor (53) is fixedly connected to a sealing sprocket (50); a sealing chain (51) is sleeved and connected between the plurality of sealing sprockets (50); and a first sealing ring (55) and a second sealing ring (56) are respectively threadedly connected to the forward and reverse threads of the plurality of bidirectional screw rods (54).

10. The airtightness testing equipment for pressure gauge processing according to claim 1, characterized in that: A conduit (44) is fixedly connected between the glass cylinder (40) and the water tank (41), an air outlet (43) is installed on the top of the water tank (41), and a sealing plug (400) is installed on the inner bottom of the glass cylinder (40).

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