Automatic detection device for air tightness of pressure gauge

Abstract

The invention, which relates to the technical field of pressure gauge detection, discloses a pressure gauge air tightness automatic detection apparatus comprising a support, a transmission mechanism, a sealing mechanism and a detection mechanism, the sealing mechanism comprises a bottom plate, a deflection seat, a sealing push plate and a sealing clamping plate; through the sealing mechanism, the pressure gauges can be connected with the sealing mechanism in a sealed mode only by pressing the pressure gauges, then the pressure gauges are conveyed to the position below the detection mechanism through the conveying mechanism to be detected, and qualified and unqualified pressure gauges are automatically conveyed into the first collection box or the second collection box after detection is completed. Therefore, automatic detection of the air tightness of the pressure gauge can be realized without manual replacement, the air tightness detection efficiency of the pressure gauge is effectively improved, the clamping degree of a sealing clamping plate in the sealing mechanism is adjustable, that is, the deflection angle of the sealing clamping plate can be increased when a sealing gasket is aged and deformed, and the sealing clamping plate can effectively seal the connecting end of the pressure gauge. The accuracy of air tightness detection of the pressure gauge is further improved.

Description

Technical Field

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

[0002] A pressure gauge is an instrument used to measure pressure. Its working principle is mainly based on the elastic deformation of sensitive elements (such as Bourdon tubes, diaphragm boxes, bellows, etc.) under 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 dial. After the pressure gauge is manufactured, it is usually necessary to conduct an airtightness test 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 be lost, resulting in inaccurate measurement.

[0003] At present, the main methods for testing the air tightness of pressure gauges include direct pressure air tightness testing, immersion testing and negative pressure testing. In the above methods, the pressure gauge is manually installed on the testing mechanism for sealing, and then manually disassembled and replaced with a new pressure gauge for testing after the test is completed. That is, the pressure gauges are tested one by one, which is troublesome and takes a lot of time, thereby making the efficiency of pressure gauge air tightness testing low.

[0004] Therefore, it is necessary to provide an automatic air tightness detection device for a pressure gauge to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solutions: an automatic air tightness detection device for a pressure gauge, comprising a bracket, a transmission mechanism, a sealing mechanism and a detection mechanism, wherein the bracket is fixedly provided with a transmission mechanism, the transmission mechanism comprises a transmission seat, a transmission chain and a transmission gear, a plurality of sealing mechanisms are slidably provided on the transmission mechanism, and the bracket is fixedly provided with a detection mechanism; The sealing mechanism comprises a bottom plate, a deflection seat, a sealing push plate and a sealing clamping plate, wherein the bottom plate is fixedly provided with a deflection seat, a sliding hole is provided at the center of the deflection seat and the bottom plate, a sliding rod is slidably provided in the sliding hole, and a spring 1 is provided between the sliding rod and the sliding hole, the sealing push plate is fixedly provided at the output end of the sliding rod, a plurality of sealing clamping plates are provided on the deflection seat in a uniformly circumferential manner, and a clamping mechanism for limiting the sliding rod is also provided in the sliding hole; The clamping mechanism comprises a plurality of clamping blocks and a driving disk for driving the clamping blocks to slide, the plurality of clamping blocks are arranged on the deflection seat in a circular sliding manner, the output end of the clamping block penetrates the sliding hole and is provided with an inclined surface, a support rod is fixedly provided on the clamping block, the driving disk is rotatably provided in the deflection seat, a plurality of inclined grooves are opened in a circular manner on the driving disk, the support rod is clamped into the inclined groove and slides along the inclined groove; The slide bar is provided with a plurality of annular slots, the slide bar can push the card block to slide and the card block can be inserted into the annular slots.

[0006] Preferably, the sealing splint includes a plate body, a rotating rod and a telescopic rod, wherein a rotating rod is vertically fixed at the bottom of the plate body, the rotating rod is rotatably connected to the deflection seat, a telescopic rod is fixed on the rotating rod, a boss is fixed at the bottom of the sealing push plate, a plurality of hinge seats are evenly fixed on the boss in a circular shape, and the output end of the telescopic rod is hinged to the hinge seat.

[0007] Preferably, the plate body is an arc-shaped plate, and a plurality of the plate bodies can be gathered together to form an annular sealing cavity. The inner arc-shaped surface and two side surfaces of the plate body are wrapped with sealing gasket 1, and the sealing gasket 1 extends outward from bottom to top to form an inclined sealing surface, and the outer surface of the sealing push plate is wrapped with sealing gasket 2.

[0008] Preferably, a push rod 1 is slidably arranged in the deflection seat, a straight groove is opened at the bottom of the bottom plate, the push rod 1 penetrates the bottom plate and extends into the straight groove, a spring 2 is fixedly arranged between the push rod 1 and the deflection seat, and a guide rod is fixedly arranged on the side of the push rod 1 close to the driving disk; A spiral groove is provided on the side of the driving disk, and the guide rod is inserted into the spiral groove and slides along the spiral groove.

[0009] Preferably, two hydraulic chambers are provided at the bottom of the transmission seat, and the hydraulic chambers are connected to an external hydraulic drive mechanism. A push rod 2 is slidably arranged in the hydraulic chamber, and the push rod 2 protrudes from the transmission seat and can be inserted into the straight groove. An inclined surface is provided at the output end of the push rod 2 and can push the push rod 1 to slide.

[0010] Preferably, the detection mechanism comprises a hydraulic cylinder, a fixing frame and a vacuum cover, wherein the hydraulic cylinder is fixedly arranged on the bracket, a hydraulic rod is slidably arranged on the hydraulic cylinder, a fixing frame is fixedly arranged on the output end of the hydraulic rod, two vacuum covers are fixedly arranged on the fixing frame, and the top of the vacuum cover is connected to the external negative pressure mechanism; The bottom plate is provided with an annular sealing groove, a sealing gasket 3 is arranged in the sealing groove, and the vacuum cover can be sealed and clamped in the sealing groove.

[0011] Preferably, it further comprises a collection box 1, a collection box 2 and a control unit, wherein the collection box 1 and the collection box 2 are respectively located under the two push rods 2, and a positioning sensor and a marking sensor are embedded in the bottom plate.

[0012] Compared with the prior art, the present invention provides an automatic air tightness detection device for a pressure gauge, which has the following beneficial effects: The present invention uses a sealing mechanism so that the pressure gauge can be sealed and connected to the sealing mechanism only by pressing, and then the pressure gauge is transmitted to the bottom of the detection mechanism for detection by using the transmission mechanism, and after the detection is completed, the qualified and unqualified pressure gauges are automatically transported to collection box one or collection box two, so that the automatic detection of the air tightness of the pressure gauge can be achieved without manual replacement, thereby effectively improving the efficiency of the air tightness detection of the pressure gauge, and the clamping degree of the sealing splint in the sealing mechanism is adjustable, that is, when the sealing gasket is aged and deformed, the sealing splint can increase the deflection angle, thereby ensuring that the sealing splint can effectively seal the connecting end of the pressure gauge, thereby further improving the accuracy of the air tightness detection of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 It is a structural schematic diagram of the sealing mechanism in the present invention; Figure 4 It is a schematic diagram of the structure of the sealing splint in the present invention; Figure 5 It is a structural schematic diagram of the sealing push plate in the present invention; Figure 6 It is a schematic diagram of the structure of the deflection seat in the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure of the middle part A; Figure 8 It is a schematic diagram of the structure of the driving disk in the present invention; Fig. 9 It is a schematic structural diagram of a push rod 1 in the present invention; In the figure: 1. bracket; 2. transmission mechanism; 21. push rod 2; 3. sealing mechanism; 31. bottom plate; 311. slide rod; 312. annular groove; 313. straight groove; 314. sealing groove; 32. deflection seat; 321. push rod 1; 322. guide rod; 33. sealing push plate; 331. boss; 332. hinge seat; 333. sealing gasket 2; 34. sealing splint; 341. plate body; 342. rotating rod; 343. telescopic rod; 344. sealing gasket 1; 35. engaging mechanism; 351. block; 352. driving disk; 353. inclined groove; 354. spiral groove; 4. detection mechanism; 41. hydraulic cylinder; 42. fixing frame; 43. vacuum cover; 5. collecting box 1; 6. collecting box 2. DETAILED DESCRIPTION

[0014] See also Figures 1 to 9 In an embodiment of the present invention, a pressure gauge air tightness automatic detection device includes a bracket 1, a transmission mechanism 2, a sealing mechanism 3 and a detection mechanism 4, wherein the bracket 1 is fixedly provided with the transmission mechanism 2, the transmission mechanism 2 includes a transmission seat, a transmission chain and a transmission gear, a plurality of sealing mechanisms 3 are slidably provided on the transmission mechanism 2, and the bracket 1 is fixedly provided with the detection mechanism 4; The sealing mechanism 3 includes 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 1 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 uniformly rotated in a circle on the deflection seat 32, and a clamping mechanism 35 for limiting the sliding rod 311 is also provided in the sliding hole; In addition, two connecting blocks are fixedly provided on both sides of the bottom plate 31, and the two connecting blocks are respectively connected to the transmission chains on both sides of the transmission seat, and the rotation of the transmission chain further drives the bottom plate 31 to slide along the transmission seat; The sealing clamping plate 34 includes a plate body 341, a rotating rod 342 and a telescopic rod 343, wherein the 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, the 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 articulated seats 332 are evenly fixedly arranged on the boss 331 in a circumferential manner, and the output end of the telescopic rod 343 is hinged to the articulated seat 332; The engaging mechanism 35 includes a plurality of blocks 351 and a driving disk 352 for driving the blocks 351 to slide. The plurality of blocks 351 are arranged on the deflection seat 32 in a circumferentially sliding manner. The output end of the block 351 penetrates the sliding hole and is provided with an inclined surface. A support rod is fixedly provided on the block 351. The driving disk 352 is rotatably provided in the deflection seat 32. The driving disk 352 is provided with a plurality of inclined grooves 353 in a circumferential manner. The support rod is inserted into the inclined groove 353 and slides along the inclined groove 353. The slide bar 311 is provided with a plurality of annular slots 312 , and the slide bar 311 can push the block 351 to slide and the block 351 can be inserted into the annular slots 312 ; A push rod 1 321 is slidably disposed in the deflection seat 32, a straight groove 313 is formed 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 disposed between the push rod 1 321 and the deflection seat 32, and a guide rod 322 is fixedly disposed 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; The bottom of the transmission seat is provided with two hydraulic chambers, the hydraulic chambers are connected to an external hydraulic drive mechanism, a push rod 21 is slidably arranged in the hydraulic chamber, the push rod 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 21 and can push the push rod 1 321 to slide; The detection mechanism 4 includes 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 the external negative pressure mechanism; The bottom plate 31 is provided with an annular sealing groove 314, a sealing gasket 3 is provided in the sealing groove 314, and the vacuum cover 43 can be sealed and inserted into the sealing groove 314; The present invention 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 under the two push rods 21 , and a positioning sensor and a marking sensor are embedded in the bottom plate 31 .

[0015] In particular, qualified pressure gauges are collected by collecting box 1 5, and unqualified pressure gauges are collected by collecting box 2 6. When the sealing mechanism 3 is transmitted to the bottom of the transmission mechanism 2, the control unit determines the position information of the bottom plate 31 according to the positioning sensor, and determines whether the pressure gauge on the bottom plate 31 is qualified according to the mark sensor. When the pressure gauge is qualified, the push rod 21 above the collecting box 1 5 is driven to slide, so that the sealing clamp 34 is opened, and the sealing push plate 33 is popped out to transport the pressure gauge to the collecting box 1 5. When the pressure gauge is unqualified, the push rod 21 above the collecting box 2 6 is driven to slide, so that the sealing clamp 34 is opened, and the sealing push plate 33 is popped out to transport the pressure gauge to the collecting box 2 6, that is, the qualified and unqualified pressure gauges are collected separately. In addition, a buffer plate can be tilted on the top of the collecting box 1 5 and the collecting box 2 6, that is, the pressure gauge is buffered when it falls to prevent damage to the pressure gauge.

[0016] During implementation, align the connecting 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 plate 34 can be deflected under the action of the rotating rod 342 and the telescopic rod 343, that is, multiple sealing clamping plates 34 are deflected at the same time and gathered to clamp the connecting 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 to slide downward, and the sliding downward sliding of the sliding rod 311 further pushes the clamping block 351 to slide. When the sealing clamping plate 34 seals and clamps the pressure gauge, the clamping block 351 can be clamped into the annular clamping groove 312, thereby clamping the sliding rod 311 and the sealing push plate 33, and the pressure gauge is sealed and connected to the sealing mechanism 3. , then the sealing mechanism 3 and the pressure gauge are transmitted to the bottom of the detection mechanism 4 by the transmission mechanism 2, and then the hydraulic rod is driven to slide by the hydraulic cylinder 41, so that the fixing frame 42 drives the vacuum cover 43 to slide downward and press on 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, and then negative pressure is applied to the sealed cavity by an external negative pressure mechanism. In this process, the vacuum degree in the sealed cavity is monitored to judge the sealing performance of the pressure gauge, and the detected data is transmitted to the control unit. The control unit controls the mark sensor in the bottom plate 31 to mark the unqualified pressure gauge according to the transmitted data information, and then the position information of the bottom plate 31 is monitored by the positioning sensor. That is, when the bottom plate 31 slides to the bottom of the transmission mechanism 2 and is located above the collection box 1 5 or the collection box 2 6, the two push rods 21 are selectively pushed out, so that the push rod 21 can push the push rod 1 321 to slide, and the sliding of the push rod 1 321 makes the guide rod 322 slide along the spiral groove 354, thereby making the driving disk 352 rotate, and the rotation of the driving disk 352 can further drive the block 351 to slide, that is, the block 351 is disengaged from the annular groove 312 so that the slide rod 311 is not restricted, and at this time, the slide rod 311 can slide out of the slide hole under the action of the spring 1, and push the sealing push plate 33 to slide, and the sliding of the sealing push plate 33 further makes the sealing clamping plate 34 open The pressure gauge is opened so that it is not restricted, and then the pressure gauge falls into the collection box 1 5 or the collection box 2 6. Then the push rod 1 321 can be reset under the action of the spring 2, and the clamping block 351 can be reset at the same time, so that when the sealing mechanism 3 is rotated to the top of the transmission mechanism 2 again, a new pressure gauge can be sealed and clamped, and the air tightness test of the pressure gauge is completed in a cycle. During this process, there is no need to manually replace the pressure gauge, and the pressure gauge only needs to be pressed on the sealing mechanism 3 to seal the pressure gauge and the sealing mechanism 3. The test work is convenient and fast, and the test efficiency of the pressure gauge is effectively improved. After the test is completed, the qualified and unqualified pressure gauges are collected separately through the collection box 1 5 and the collection box 2 6, and its convenience is further improved.This can realize the automatic detection of the air tightness of the pressure gauge.

[0017] In this embodiment, Figure 4 The plate body 341 is an arc-shaped plate. A plurality of the plate bodies 341 can be gathered together to form an annular sealing cavity. The inner arc-shaped surface and two side surfaces of the plate body 341 are wrapped with a sealing gasket 344, and the sealing gasket 344 extends outward from bottom to top to form an inclined sealing surface. The outer surface of the sealing push plate 33 is wrapped with a sealing gasket 333.

[0018] The sealing pad 344 is preferably provided on the upper surface of the sealing plate 311 so as to be able to fit the sealing pad 341 on the connecting end of the pressure gauge. The sealing pad 344 is preferably provided on the upper surface of the sealing plate 311 so as to be able to fit the sealing pad 341 on the connecting end of the pressure gauge.

[0019] To sum up, when the present invention is implemented, the sealing mechanism 3 allows the pressure gauge to be sealed and connected to the sealing mechanism 3 by only pressing the pressure gauge, and then the transmission mechanism 2 is used to transmit the pressure gauge to the bottom of the detection mechanism 4 for detection, and after the detection is completed, the qualified and unqualified pressure gauges are automatically transported to the collection box 1 5 or the collection box 2 6, so that the automatic detection of the air tightness of the pressure gauge can be achieved without manual replacement, which effectively improves the efficiency of the air tightness detection of the pressure gauge, and the clamping degree of the sealing splint 34 in the sealing mechanism 3 is adjustable, that is, when the sealing gasket 1 344 is aged and deformed, the sealing splint 34 can increase the deflection angle, to ensure that the sealing splint 34 can effectively seal the connecting end of the pressure gauge, thereby further improving the accuracy of the air tightness detection of the pressure gauge.

[0020] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by 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 clamp (34), wherein the bottom plate (31) is fixedly provided with a 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 clamps (34) are provided on the deflection seat (32) so as to rotate uniformly in a circular manner, 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 engaging blocks (351) and a driving disk (352) for driving the engaging blocks (351) to slide; the plurality of engaging blocks (351) are arranged on the deflection seat (32) in a circumferentially sliding manner; the output end of the engaging block (351) penetrates the sliding hole and is provided with an inclined surface; a support rod is fixedly provided on the engaging block (351); the driving disk (352) is rotatably provided in the deflection seat (32); a plurality of inclined grooves (353) are circumferentially provided on the driving disk (352); the support rod is engaged in the inclined groove (353) and slides along the inclined groove (353); A plurality of annular slots (312) are formed on the sliding rod (311), and the sliding rod (311) can push the block (351) to slide, and the block (351) can be inserted into the annular slots (312).

2. The automatic air tightness detection device for a pressure gauge according to claim 1, characterized in that: 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 fixedly arranged on the boss (331) in a circumferentially uniform manner, and an output end of the telescopic rod (343) is hingedly connected to the hinge seat (332).

3. The automatic air tightness detection device for a pressure gauge according to claim 2, characterized in that: The plate body (341) is an arc-shaped plate, and a plurality of the plate bodies (341) can be gathered together to form an annular sealing cavity. The inner arc-shaped 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. The outer surface of the sealing push plate (33) is wrapped with a sealing gasket 2 (333).

4. The automatic air tightness detection device for a pressure gauge according to claim 1, characterized in that: A push rod 1 (321) is slidably disposed in the deflection seat (32); a straight groove (313) is formed 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 disposed between the push rod 1 (321) and the deflection seat (32); and a guide rod (322) is fixedly disposed on a side of the push rod 1 (321) close to the driving disk (352); A spiral groove (354) is provided 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).

5. The automatic air tightness detection device for a pressure gauge according to claim 4, characterized in that: Two hydraulic chambers are provided at the bottom of the transmission seat, and 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). An inclined surface is provided at the output end of the push rod 2 (21) and can push the push rod 1 (321) to slide.

6. 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 at 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 inserted into the sealing groove (314).

7. The automatic air tightness detection device for a pressure gauge according to claim 5, 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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