An automatic airtightness detection device for pressure gauges

Abstract

The present invention discloses an automatic airtightness detection device for pressure gauges, which relates to the technical field of pressure gauge detection. It includes a bracket, a transmission mechanism, a sealing mechanism, and a detection mechanism. The sealing mechanism includes a bottom plate, a deflection seat, a sealing push plate, and a sealing clamp plate. Through the sealing mechanism, the pressure gauge only needs to be pressed to seal and connect the pressure gauge with the sealing mechanism. Subsequently, the transmission mechanism is used to transfer the pressure gauge to the lower part of the detection mechanism for detection, and after the detection is completed, the qualified and unqualified pressure gauges are automatically conveyed to the first collection box or the second collection box. Furthermore, the automatic airtightness detection of the pressure gauge can be realized without manual replacement, effectively improving the airtightness detection efficiency of the pressure gauge. And the clamping degree of the sealing clamp plate in the sealing mechanism is adjustable, that is, when the first sealing gasket ages and deforms, the sealing clamp plate can increase the deflection angle to ensure that the sealing clamp plate can effectively seal the connection end of the pressure gauge, further improving the accuracy of the airtightness detection of the pressure gauge.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure gauge detection, and specifically to an automatic airtightness detection device for pressure gauges. Background Art

[0002] A pressure gauge is an instrument used to measure pressure. Its working principle is mainly based on the elastic deformation of a sensitive element (such as a Bourdon tube, diaphragm box, bellows, etc.) under the action of pressure. This deformation is transmitted to the pointer through the conversion mechanism of the movement inside the gauge, causing the pointer to rotate, thereby indicating the measured pressure value on the scale. After the pressure gauge is manufactured, it is usually necessary to perform an airtightness detection on the pressure gauge. A pressure gauge with good airtightness can accurately measure and indicate the pressure value. If there is a leak in the pressure gauge, the gas or liquid inside it may leak, resulting in inaccurate measurement.

[0003] Currently, the main methods for detecting the airtightness of pressure gauges include direct pressure airtightness detection, immersion method detection, and negative pressure method detection. When using the above methods for detection, the pressure gauges are manually sealed and installed on the detection mechanism, and then manually disassembled and replaced with new pressure gauges for detection after the detection is completed, that is, each pressure gauge is detected one by one, which is rather troublesome and time-consuming, thus resulting in low efficiency of the airtightness detection of pressure gauges.

[0004] Therefore, it is necessary to provide an automatic airtightness detection device for pressure gauges to solve the problems raised in the above background art. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: An automatic airtightness detection device for pressure gauges, including a bracket, a transmission mechanism, a sealing mechanism, and a detection mechanism. Among them, a transmission mechanism is fixedly arranged on the bracket. The transmission mechanism includes a transmission seat, a transmission chain, and a transmission gear. A plurality of sealing mechanisms are slidably arranged on the transmission mechanism, and a detection mechanism is fixedly arranged on the bracket;

[0006] The sealing mechanism includes a bottom plate, a deflection seat, a sealing push plate, and a sealing clamp. Among them, a deflection seat is fixedly arranged on the bottom plate. A sliding hole is opened at the central positions of the deflection seat and the bottom plate. A sliding rod is slidably arranged in the sliding hole, and a first spring is arranged between the sliding rod and the sliding hole. The sealing push plate is fixedly arranged at the output end of the sliding rod. A plurality of sealing clamps are rotatably arranged in a circumferential and uniform manner on the deflection seat. A clamping mechanism for restricting the sliding rod is also arranged in the sliding hole;

[0007] The engaging mechanism includes a plurality of locking blocks and a driving disk for driving the sliding of the locking blocks. The plurality of locking blocks are slidably arranged in a circumferential manner on the deflection seat. The output end of the locking block penetrates through the sliding hole and is provided with an inclined surface. A support rod is fixedly arranged on the locking block. The driving disk is rotatably arranged in the deflection seat. A plurality of inclined grooves are circumferentially formed on the driving disk. The support rod is snapped into the inclined groove and slides along the inclined groove.

[0008] A plurality of annular clamping grooves are formed on the sliding rod. The sliding rod can push the locking block to slide and the locking block can be snapped into the annular clamping groove.

[0009] Preferably, the sealing clamping plate includes a plate body, a rotating rod and a telescopic rod. Wherein, a rotating rod is vertically and fixedly arranged at the bottom of the plate body. The rotating rod is rotatably connected with the deflection seat. A telescopic rod is fixedly arranged on the rotating rod. A convex platform is fixedly arranged at the bottom of the sealing push plate. A plurality of hinge seats are evenly and circumferentially fixedly arranged on the convex platform. The output end of the telescopic rod is hinged with the hinge seat.

[0010] Preferably, the plate body is an arc-shaped plate. A plurality of the plate bodies can be gathered to form an annular sealing cavity. A first sealing pad is wrapped on the inner arc surface and two side surfaces of the plate body. And the first sealing pad extends outward from bottom to top to form an inclined sealing surface. A second sealing pad is wrapped on the outer surface of the sealing push plate.

[0011] Preferably, a first push rod is slidably arranged in the deflection seat. A straight groove is formed at the bottom of the bottom plate. The first push rod penetrates through the bottom plate and extends into the straight groove. A second spring is fixedly arranged between the first push rod and the deflection seat. A guide rod is fixedly arranged on one side of the first push rod close to the driving disk.

[0012] A spiral groove is formed on the side surface of the driving disk. The guide rod is snapped into the spiral groove and slides along the spiral groove.

[0013] Preferably, two hydraulic cavities are formed at the bottom of the transmission seat. The hydraulic cavities are connected with an external hydraulic driving mechanism. A second push rod is slidably arranged in the hydraulic cavity. The second push rod protrudes from the transmission seat and can be snapped into the straight groove. An inclined surface is arranged at the output end of the second push rod and can push the first push rod to slide.

[0014] Preferably, the detection mechanism includes a hydraulic cylinder, a fixing frame and a vacuum hood. Wherein, the hydraulic cylinder is fixedly arranged on the support. A hydraulic rod is slidably arranged on the hydraulic cylinder. A fixing frame is fixedly arranged at the output end of the hydraulic rod. Two vacuum hoods are fixedly arranged on the fixing frame. The top of the vacuum hood is communicated with an external negative pressure mechanism.

[0015] An annular sealing groove is formed in the bottom plate, a third sealing gasket is arranged in the sealing groove, and the vacuum cover can be hermetically clamped into the sealing groove.

[0016] Preferably, it further includes a first collection box, a second collection box and a control unit. Among them, the first collection box and the second collection box are respectively located below the two second push rods, and a positioning sensor and a marking sensor are embedded in the bottom plate.

[0017] Compared with the prior art, the present invention provides a pressure gauge airtightness automatic detection device, which has the following beneficial effects:

[0018] Through the sealing mechanism of the present invention, the pressure gauge only needs to be pressed to seal and connect the pressure gauge with the sealing mechanism. Subsequently, the pressure gauge is transported to the lower part of the detection mechanism by the transmission mechanism for detection, and after the detection is completed, the qualified and unqualified pressure gauges are automatically transported to the first collection box or the second collection box. Therefore, the automatic detection of the airtightness of the pressure gauge can be realized without manual replacement, effectively improving the detection efficiency of the airtightness of the pressure gauge. Moreover, the clamping degree of the sealing clamp plate in the sealing mechanism is adjustable, that is, when the first sealing gasket ages and deforms, the sealing clamp plate can increase the deflection angle to ensure that the sealing clamp plate can effectively seal the connection end of the pressure gauge, further improving the accuracy of the airtightness detection of the pressure gauge. Description of the Drawings

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is a cross-sectional structural schematic diagram of the present invention;

[0021] Figure 3 is a structural schematic diagram of the sealing mechanism in the present invention;

[0022] Figure 4 is a structural schematic diagram of the sealing clamp plate in the present invention;

[0023] Figure 5 is a structural schematic diagram of the sealing push plate in the present invention;

[0024] Figure 6 is a structural schematic diagram of the deflection seat in the present invention;

[0025] Figure 7 is Figure 6 the enlarged structural schematic diagram of part A in;

[0026] Figure 8 is a structural schematic diagram of the driving disk in the present invention;

[0027] Figure 9 is a structural schematic diagram of the first push rod in the present invention;

[0028] In the figure: 1. Bracket; 2. Transmission mechanism; 21. Second push rod; 3. Sealing mechanism; 31. Bottom plate; 311. Slide bar; 312. Annular card slot; 313. Straight slot; 314. Sealing slot; 32. Deflection seat; 321. First push rod; 322. Guide rod; 33. Sealing push plate; 331. Boss; 332. Hinge seat; 333. Second sealing gasket; 34. Sealing clamp plate; 341. Plate body; 342. Rotating rod; 343. Telescopic rod; 344. First sealing gasket; 35. Engaging mechanism; 351. Block; 352. Driving disc; 353. Inclined slot; 354. Spiral slot; 4. Detection mechanism; 41. Hydraulic cylinder; 42. Fixed frame; 43. Vacuum hood; 5. First collection box; 6. Second collection box. Detailed implementation mode

[0029] Please refer to Figures 1 to 9 In an embodiment of the present invention, an automatic airtightness detection device for a pressure gauge includes a bracket 1, a transmission mechanism 2, a sealing mechanism 3, and a detection mechanism 4. Among them, the transmission mechanism 2 is fixedly arranged on the bracket 1. The transmission mechanism 2 includes a transmission seat, a transmission chain, and a transmission gear. A plurality of sealing mechanisms 3 are slidably arranged on the transmission mechanism 2, and the detection mechanism 4 is fixedly arranged on the bracket 1;

[0030] The sealing mechanism 3 includes a bottom plate 31, a deflection seat 32, a sealing push plate 33, and a sealing clamp plate 34. Among them, the deflection seat 32 is fixedly arranged on the bottom plate 31. A sliding hole is opened at the central positions of the deflection seat 32 and the bottom plate 31. A slide bar 311 is slidably arranged in the sliding hole, and a first spring is arranged between the slide bar 311 and the sliding hole. The sealing push plate 33 is fixedly arranged at the output end of the slide bar 311. A plurality of sealing clamp plates 34 are rotatably arranged in a circumferential and uniform manner on the deflection seat 32. An engaging mechanism 35 for restricting the slide bar 311 is also arranged in the sliding hole;

[0031] In addition, two connecting blocks are fixedly arranged on both sides of the bottom plate 31. The two connecting blocks are respectively connected to the transmission chains on both sides of the transmission seat. The rotation of the transmission chain further drives the bottom plate 31 to slide along the transmission seat;

[0032] The sealing clamp plate 34 includes a plate body 341, a rotating rod 342, and a telescopic rod 343. Among them, the rotating rod 342 is vertically and fixedly arranged at the bottom of the plate body 341. The rotating rod 342 is rotatably connected to the deflection seat 32. The telescopic rod 343 is fixedly arranged on the rotating rod 342. The boss 331 is fixedly arranged at the bottom of the sealing push plate 33. A plurality of hinge seats 332 are fixedly arranged in a circumferential and uniform manner on the boss 331. The output end of the telescopic rod 343 is hinged to the hinge seat 332;

[0033] The engaging mechanism 35 includes a plurality of locking blocks 351 and a driving disk 352 for driving the sliding of the locking blocks 351. The plurality of locking blocks 351 are arranged in a circumferential sliding manner on the deflection seat 32. The output end of the locking block 351 penetrates through the sliding hole and is provided with an inclined surface. A support rod is fixedly arranged on the locking block 351. The driving disk 352 is rotatably arranged in the deflection seat 32. A plurality of inclined slots 353 are circumferentially formed on the driving disk 352. The support rod is clamped into the inclined slot 353 and slides along the inclined slot 353.

[0034] A plurality of annular clamping slots 312 are formed on the sliding rod 311. The sliding rod 311 can push the locking block 351 to slide and the locking block 351 can be clamped into the annular clamping slot 312.

[0035] A push rod one 321 is slidably arranged in the deflection seat 32. A straight slot 313 is formed at the bottom of the bottom plate 31. The push rod one 321 penetrates through the bottom plate 31 and extends into the straight slot 313. A second spring is fixedly arranged between the push rod one 321 and the deflection seat 32. A guide rod 322 is fixedly arranged on the side of the push rod one 321 close to the driving disk 352.

[0036] A spiral slot 354 is formed on the side surface of the driving disk 352. The guide rod 322 is clamped into the spiral slot 354 and slides along the spiral slot 354.

[0037] Two hydraulic chambers are formed at the bottom of the transmission seat. The hydraulic chambers are connected to an external hydraulic driving mechanism. A push rod two 21 is slidably arranged in the hydraulic chambers. The push rod two 21 protrudes from the transmission seat and can be clamped into the straight slot 313. The output end of the push rod two 21 is provided with an inclined surface and can push the push rod one 321 to slide.

[0038] The detection mechanism 4 includes a hydraulic cylinder 41, a fixing frame 42 and a vacuum hood 43. Among them, the hydraulic cylinder 41 is fixedly arranged on the bracket 1. A hydraulic rod is slidably arranged on the hydraulic cylinder 41. The output end of the hydraulic rod is fixedly provided with a fixing frame 42. Two vacuum hoods 43 are fixedly arranged on the fixing frame 42. The top of the vacuum hood 43 is communicated with an external negative pressure mechanism.

[0039] An annular sealing groove 314 is formed on the bottom plate 31. A third sealing gasket is arranged in the sealing groove 314. The vacuum hood 43 can be hermetically clamped into the sealing groove 314.

[0040] The present invention further includes a first collection box 5, a second collection box 6 and a control unit. Among them, the first collection box 5 and the second collection box 6 are respectively located below the two push rods two 21. A positioning sensor and a marking sensor are embedded in the bottom plate 31.

[0041] Specifically, the qualified pressure gauges are collected by the first collection box 5, and the unqualified pressure gauges are collected by the second collection box 6. When the sealing mechanism 3 is transmitted to the bottom of the transmission mechanism 2, the control unit judges the position information of the bottom plate 31 according to the positioning sensor, and judges whether the pressure gauge on this bottom plate 31 is qualified according to the marking sensor. When the pressure gauge is qualified, the push rod two 21 above the first collection box 5 is driven to slide, so that the sealing clamping plate 34 opens, and the sealing push plate 33 pops out to convey the pressure gauge into the first collection box 5. When the pressure gauge is unqualified, the push rod two 21 above the second collection box 6 is driven to slide, so that the sealing clamping plate 34 opens, and the sealing push plate 33 pops out to convey the pressure gauge into the second collection box 6, that is, the qualified and unqualified pressure gauges are collected separately. In addition, buffer plates can be inclinedly arranged at the tops of the first collection box 5 and the second collection box 6, that is, to buffer the pressure gauges when they fall, and prevent the pressure gauges from being damaged.

[0042] During implementation, align the connection end of the pressure gauge with the sealing push plate 33 and press the sealing push plate 33 downward. During this process, the sealing clamping plates 34 can deflect under the action of the rotating rod 342 and the telescopic rod 343, that is, multiple sealing clamping plates 34 deflect and gather simultaneously to clamp the connection end of the pressure gauge and the sealing push plate 33. And when the sealing push plate 33 slides downward, it can synchronously push the sliding rod 311 downward. The downward sliding of the sliding rod 311 further pushes the clamping block 351 to slide. When the sealing clamping plates 34 tightly seal and clamp the pressure gauge, the clamping block 351 can be inserted into the annular card slot 312, thereby clamping the sliding rod 311 and the sealing push plate 33, that is, sealingly connecting the pressure gauge and the sealing mechanism 3. Subsequently, use the transmission mechanism 2 to transmit the sealing mechanism 3 and the pressure gauge below the detection mechanism 4. Subsequently, drive the hydraulic rod to slide by the hydraulic cylinder 41, so that the fixed frame 42 drives the vacuum cover 43 to slide downward and cover the pressure gauge and the sealing mechanism 3. And the vacuum cover 43 can be inserted into the sealing groove 314 to form a sealed cavity. Subsequently, apply negative pressure to this sealed cavity through an external negative pressure mechanism. During this process, monitor the vacuum degree in the sealed cavity to judge the sealing performance of the pressure gauge, and transmit the detected data to the control unit. The control unit controls the marking sensor in the bottom plate 31 to mark the unqualified pressure gauges according to the transmitted data information. Subsequently, monitor the position information of the bottom plate 31 through the positioning sensor, that is, when the bottom plate 31 slides to the bottom of the transmission mechanism 2 and is above the collection box one 5 or the collection box two 6, selectively push out two push rods two 21, so that the push rods two 21 can push the push rod one 321 to slide. The sliding of the push rod one 321 makes the guide rod 322 slide along the spiral groove 354, thereby making the driving disk 352 rotate. The rotation of the driving disk 352 can further drive the clamping block 351 to slide, that is, the clamping block 351 disengages from the annular card slot 312, so that the sliding rod 311 is not restricted. At this time, the sliding rod 311 can slide out of the sliding hole under the action of the first spring and push the sealing push plate 33 to slide. The sliding of the sealing push plate 33 further makes the sealing clamping plates 34 open, so that the pressure gauge is not restricted, and then the pressure gauge falls into the collection box one 5 or the collection box two 6. Subsequently, the push rod one 321 can reset under the action of the second spring, and at the same time make the clamping block 351 reset, so that when the sealing mechanism 3 rotates above the transmission mechanism 2 again, it can seal and connect a new pressure gauge. In this way, the airtightness detection of the pressure gauge is completed in a cycle. During this process, there is no need for manual replacement of the pressure gauge, and only by pressing the pressure gauge on the sealing mechanism 3, the pressure gauge can be sealingly connected to the sealing mechanism 3, thereby making the detection work convenient and fast, effectively improving the detection efficiency of the pressure gauge, and separating and collecting the qualified and unqualified pressure gauges through the collection box one 5 and the collection box two 6 after the detection, further improving its convenience.And realize the automatic detection of the air tightness of the pressure gauge accordingly.

[0043] In this embodiment, as Figure 4 , the plate body 341 is an arc-shaped plate, and a plurality of the plate bodies 341 can be gathered to form an annular sealing cavity. A first sealing gasket 344 is wrapped around the inner arc surface and two side surfaces of the plate body 341, and the first sealing gasket 344 extends outward from bottom to top to form an inclined sealing surface. A second sealing gasket 333 is wrapped around the outer surface of the sealing push plate 33.

[0044] Particularly, setting the plate body 341 as an arc-shaped plate enables it to fit on the connection end of the pressure gauge, and the first sealing gasket 344 extends outward from bottom to top to form an inclined sealing surface. When the sealing clamping plate 34 deflects, the first sealing gasket 344 at the top of the sealing clamping plate 34 can preferentially fit on the connection end of the pressure gauge. Subsequently, as the sealing clamping plates 34 are gathered, the first sealing gasket 344 can be squeezed and then closely fit together to completely seal the connection end of the pressure gauge. Moreover, the gathering space of the plurality of sealing clamping plates 34 gradually decreases as the sealing push plate 33 slides down. During the long-term sealing process, the first sealing gasket 344 will deform. Therefore, a plurality of annular clamping grooves 312 are provided on the sliding rod 311, so that the sliding distance of the sealing push plate 33 can be adjusted according to the clamping degree of the sealing clamping plate 34, that is, to ensure that after the sealing clamping plate 34 completely seals and clamps the connection end of the pressure gauge, the clamping block 351 will only be stuck into the annular clamping groove 312, thereby ensuring the air tightness of the pressure gauge and further improving the accuracy of the detection result.

[0045] In summary, when the present invention is implemented, through the sealing mechanism 3, the pressure gauge only needs to be pressed to seal and connect the pressure gauge with the sealing mechanism 3. Subsequently, the transmission mechanism 2 is used to transport the pressure gauge to the lower part of the detection mechanism 4 for detection, and after the detection is completed, the qualified and unqualified pressure gauges are automatically transported to the first collection box 5 or the second collection box 6, thereby realizing the automatic detection of the air tightness of the pressure gauge without manual replacement, effectively improving the detection efficiency of the air tightness of the pressure gauge, and the clamping degree of the sealing clamping plate 34 in the sealing mechanism 3 is adjustable. That is, when the first sealing gasket 344 ages and deforms, the sealing clamping plate 34 can increase the deflection angle to ensure that the sealing clamping plate 34 can effectively seal the connection end of the pressure gauge, further improving the accuracy of the air tightness detection of the pressure gauge.

[0046] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An automatic air tightness detection device for a pressure gauge, characterized in that: The invention comprises a support (1), a transmission mechanism (2), a sealing mechanism (3) and a detection mechanism (4), wherein the transmission mechanism (2) is fixedly arranged on the support (1), the transmission mechanism (2) comprises a transmission seat, a transmission chain and a transmission gear, a plurality of sealing mechanisms (3) are slidably arranged on the transmission mechanism (2), and the detection mechanism (4) is fixedly arranged on the support (1); The sealing mechanism (3) comprises a bottom plate (31), a deflection seat (32), a sealing push plate (33) and a sealing clamping plate (34), wherein the bottom plate (31) is fixedly provided with the deflection seat (32), a sliding hole is provided at the center of the deflection seat (32) and the bottom plate (31), a sliding rod (311) is slidably provided in the sliding hole, and a spring is provided between the sliding rod (311) and the sliding hole, the sealing push plate (33) is fixedly provided at the output end of the sliding rod (311), a plurality of sealing clamping plates (34) are provided on the deflection seat (32) so as to rotate evenly in a circular pattern, and a clamping mechanism (35) for limiting the sliding rod (311) is also provided in the sliding hole; The engaging mechanism (35) comprises a plurality of card blocks (351) and a driving disk (352) for driving the card blocks (351) to slide. The plurality of card blocks (351) are arranged on the deflection seat (32) in a circular sliding manner. The output end of the card block (351) penetrates the sliding hole and is provided with an inclined surface. A support rod is fixedly arranged on the card block (351). The driving disk (352) is rotatably arranged in the deflection seat (32). The driving disk (352) is provided with a plurality of inclined grooves (353) in a circular manner. The support rod is inserted into the inclined groove (353) and slides along the inclined groove (353). A plurality of annular grooves (312) are provided on the slide bar (311), and the slide bar (311) can push the block (351) to slide, and the block (351) can be inserted into the annular grooves (312); The sealing clamping plate (34) comprises a plate body (341), a rotating rod (342) and a telescopic rod (343), wherein a rotating rod (342) is vertically fixedly arranged at the bottom of the plate body (341), the rotating rod (342) is rotatably connected to the deflection seat (32), a telescopic rod (343) is fixedly arranged on the rotating rod (342), a boss (331) is fixedly arranged at the bottom of the sealing push plate (33), a plurality of hinge seats (332) are evenly fixedly arranged on the boss (331) in a circumferential manner, and an output end of the telescopic rod (343) is hinged to the hinge seat (332); The plate body (341) is an arc-shaped plate, and a plurality of plate bodies (341) are gathered together to form an annular sealing cavity.

2. The automatic air tightness detection device for a pressure gauge according to claim 1, characterized in that: The inner arc surface and two side surfaces of the plate body (341) are wrapped with a sealing gasket 1 (344), and the sealing gasket 1 (344) extends outward from bottom to top to form an inclined sealing surface, and the outer surface of the sealing push plate (33) is wrapped with a sealing gasket 2 (333).

3. The automatic air tightness detection device for a pressure gauge according to claim 1, characterized in that: A push rod 1 (321) is slidably arranged in the deflection seat (32), a straight groove (313) is opened at the bottom of the bottom plate (31), the push rod 1 (321) penetrates the bottom plate (31) and extends into the straight groove (313), a spring 2 is fixedly arranged between the push rod 1 (321) and the deflection seat (32), and a guide rod (322) is fixedly arranged on one side of the push rod 1 (321) close to the driving disk (352); A spiral groove (354) is formed on the side of the driving disk (352), and the guide rod (322) is inserted into the spiral groove (354) and slides along the spiral groove (354).

4. The automatic air tightness detection device for a pressure gauge according to claim 3, characterized in that: Two hydraulic chambers are provided at the bottom of the transmission seat, the hydraulic chambers are connected to an external hydraulic drive mechanism, a push rod 2 (21) is slidably arranged in the hydraulic chamber, the push rod 2 (21) protrudes from the transmission seat and can be inserted into the straight groove (313), and an inclined surface is arranged at the output end of the push rod 2 (21) and can push the push rod 1 (321) to slide.

5. The automatic air tightness detection device for a pressure gauge according to claim 1, characterized in that: The detection mechanism (4) comprises a hydraulic cylinder (41), a fixing frame (42) and a vacuum cover (43), wherein the hydraulic cylinder (41) is fixedly arranged on the bracket (1), a hydraulic rod is slidably arranged on the hydraulic cylinder (41), a fixing frame (42) is fixedly arranged on the output end of the hydraulic rod, two vacuum covers (43) are fixedly arranged on the fixing frame (42), and the top of the vacuum cover (43) is connected to an external negative pressure mechanism; An annular sealing groove (314) is provided on the bottom plate (31), a sealing gasket (3) is provided in the sealing groove (314), and the vacuum cover (43) can be sealed and clamped in the sealing groove (314).

6. The automatic air tightness detection device for a pressure gauge according to claim 4, characterized in that: It also includes a collection box 1 (5), a collection box 2 (6) and a control unit, wherein the collection box 1 (5) and the collection box 2 (6) are respectively located below the two push rods 2 (21), and a positioning sensor and a marking sensor are embedded in the bottom plate (31).

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