A pneumatic leak detection device

Abstract

The utility model relates to the field of detection equipment, and in particular to a pneumatic leakage detection equipment. It includes a base plate and an air intake hose, the upper surface of the base plate is fixedly connected to a support plate, the upper surface of the support plate is fixedly connected to a mounting plate, the inner wall of the base plate is provided with a workpiece body, the upper surface of the mounting plate is provided with a limiting structure, the limiting structure includes a large cylinder, the large cylinder is fixedly connected to the upper surface of the mounting plate, the output end of the large cylinder is fixedly connected to a pressure head, one side of the base plate is fixedly connected to a small cylinder, the output end of the small cylinder is fixedly connected to a sealing head. The pneumatic leakage detection equipment provided by the utility model has the advantages of forming a seal by pressing with a cylinder to avoid product assembly damage, and at the same time, the detection divided into several processes is concentrated on one detection tool to complete, which simplifies the process, improves efficiency, reduces the labor intensity of employees, and saves production costs.

Description

Technical Field

[0001] The utility model relates to the field of detection equipment, in particular to a pneumatic leakage detection device. Background Art

[0002] Leak detection equipment is mainly used to detect the air tightness of workpieces. Leak detection equipment can ensure the production quality of workpieces.

[0003] The utility model with announcement number CN203595591U discloses a leakage detection device, and the technical solution thereof mainly includes: comprising a base frame, on which two detection stations are arranged, each detection station mainly comprising a pressure sensor, a sealing fixture consisting of a fixture cover and a fixture body, a plurality of guide columns, a fixture cover fixing plate, a main cylinder fixing plate, a main cylinder, an inflation and exhaust base, etc. This leakage detection device has a simple structure, is easy to use, and has high detection efficiency.

[0004] With regard to the relevant contents mentioned above, it is believed that the following technical defects exist: the existing process adopts a single chamber for leakage value detection. When there are multiple chambers that need to be tested for leakage, each chamber needs to be clamped, sealed and tested separately. After one chamber is tested, the other chambers are sealed and tested again in turn, which involves repeated clamping and testing. The clamping time is too long and the clamping is inconvenient, resulting in low work efficiency. At the same time, repeated clamping will damage the product, resulting in high production costs. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a pneumatic leakage detection device.

[0006] In order to solve the above technical problems, the utility model provides a pneumatic leakage detection device, including: a base plate and an air intake hose, the upper surface of the base plate is fixedly connected to a support plate, the upper surface of the support plate is fixedly connected to a mounting plate, the inner wall of the base plate is provided with a workpiece body, the upper surface of the mounting plate is provided with a limiting structure, the limiting structure includes a large cylinder, the large cylinder is fixedly connected to the upper surface of the mounting plate, the output end of the large cylinder is fixedly connected to a pressure head, a small cylinder is fixedly connected to one side of the base plate, and the output end of the small cylinder is fixedly connected to a sealing head.

[0007] Preferably, a hand-operated valve is installed on one side of the support plate, the lower surface of the hand-operated valve is connected to the main air source inlet, the upper surface of the hand-operated valve is fixedly connected to a three-way quick connector, one end of the three-way quick connector is connected to a first speed regulating valve via a conduit, the first speed regulating valve is connected to the large cylinder, one end of the three-way quick connector is connected to a second speed regulating valve via a conduit, the second speed regulating valve is connected to the small cylinder.

[0008] Preferably, a sealing gasket is fixedly connected to the upper surface of the bottom plate, and the upper surface of the sealing gasket is in contact with the workpiece body.

[0009] Preferably, two positioning pins are fixedly connected to the upper surface of the base plate.

[0010] Preferably, an auxiliary structure is provided at the lower end of the total air source inlet, and the auxiliary structure includes a connecting pipe, the upper end of the connecting pipe is connected to the total air source inlet, the connecting pipe is sleeved on the outside of the air intake hose, the outer wall of the connecting pipe is threadedly connected with an adjusting ring, the outer wall of the connecting pipe is slidably connected with a slip ring, the upper surface of the slip ring is fixedly connected with a plurality of top blocks, the outer wall of the connecting pipe is slidably penetrated with a plurality of connecting blocks, the cross-section of the connecting block is a right-angled trapezoid, the cross-section of the top block is a right-angled trapezoid, and one side of the connecting block is fixedly connected with an arc plate.

[0011] The effect achieved by the above components is: by setting up an auxiliary structure, after the air intake hose is connected to the main air source inlet, personnel can easily adjust the arc plate to squeeze and limit the air intake hose, thereby avoiding the air intake hose connected to the air pump from being unstable due to the air pressure and the main air source inlet, thereby achieving the effect of improving the overall operating stability of the pneumatic leak detection equipment.

[0012] Preferably, a partition is fixedly connected to the upper surface of the connecting block, a positioning rod is slidably penetrated through the side surface of the partition, a spring is sleeved on the arc surface of the positioning rod, and both ends of the spring are fixedly connected to the connecting tube and the partition respectively.

[0013] The effect achieved by the above components is: after the top block is separated from the connecting block, the spring can drive the connecting block to move quickly away from the air intake hose, and the connecting block drives the arc plate, thereby achieving the effect of quickly separating the arc plate from the air intake hose.

[0014] Preferably, the outer wall of the slip ring is fixedly connected to a limit plate, a limit rod is slidably penetrated through the surface of the limit plate, and one end of the limit rod is fixedly connected to the outer wall of the connecting tube.

[0015] The effect achieved by the above components is that when the slip ring moves along the arc surface of the connecting tube, the limit plate fixed on the slip ring will move along the arc surface of the limit rod, thereby achieving the effect of preventing rotational deviation of the slip ring during movement.

[0016] Compared with the related art, the pneumatic leak detection device provided by the utility model has the following advantages:

[0017] Beneficial effects:

[0018] The utility model provides a pneumatic leakage detection device, which clamps and seals all chambers at one time by using the positioning pins and cylinders on the tooling, and at the same time, the tooling is provided with air holes connected to the corresponding chambers, and the other end of the air holes is connected to the air pipe of the detection instrument through a quick connector, a first speed regulating valve is installed on the large cylinder, and a second speed regulating valve is installed on the small cylinder, so that the action sequence and speed of the large cylinder and the small cylinder can be controlled, and the cylinder gas source is controlled by a five-port three-position center-sealed hand lever valve, the gas source is first connected to the hand lever valve gas source inlet, and then connected to the air pipe at the two outlets, and the air pipe is respectively connected to a three-way quick connector, and the three-way quick connector is connected to the air pipe. The other two interfaces are connected to the extension and retraction chambers of the large cylinder and the small cylinder respectively to control the extension and retraction of the cylinder; when detecting leakage, first place the product to be detected on the tooling through the positioning pin, then start the hand lever valve, the upper large cylinder first drives the pressure head to press the product and form a seal with the sealing gasket in the lower chamber, then the side small cylinder moves to push the sealing head on the tooling, and the sealing head is equipped with a sealing ring to form a seal with another chamber, finally, start two leakage detectors to first detect the leakage value of the first and second chambers of the product (two chambers of the lower end sealing gasket), and after the detection is completed, start another leakage detector to detect the leakage value of the side chamber. Finally, close the hand lever valve and the cylinder retracts quickly. At this point, all product leakage detection is completed, which is a working cycle.

[0019] After the main air source inlet is connected to the air intake hose, first rotate the adjusting ring to move along the arc surface of the connecting pipe, so that the adjusting ring squeezes the slip ring, the slip ring drives the top block, the top block squeezes the connecting block, and the connecting block drives the arc plate to squeeze the outer wall of the air intake hose under the drive of the top block. When the extrusion is completed, the air intake hose can be limited. When it is necessary to separate the arc plate from the air intake hose, rotate the adjusting ring in the opposite direction to separate the slip ring. At this time, the spring drives the connecting block to move away from the air intake hose, and the connecting block drives the arc plate. At this time, the arc plate can be driven to separate from the air intake hose. When the slip ring moves along the arc surface of the connecting pipe, the air intake hose fixed on the slip ring The limit plate will move along the arc surface of the limit rod, thereby preventing rotational deviation from occurring during the movement of the slip ring. In addition, after the top block is separated from the connecting block, the spring can drive the connecting block to move quickly away from the air intake hose, and the connecting block drives the arc plate, thereby achieving the effect of quickly separating the arc plate from the air intake hose. By setting an auxiliary structure, after the air intake hose is connected to the main air source inlet, personnel can easily adjust the arc plate to squeeze and limit the air intake hose, thereby preventing the air intake hose connected to the air pump from being unstable due to the air pressure and the main air source inlet, thereby achieving the effect of improving the overall operating stability of the pneumatic leak detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a pneumatic leak detection device provided by the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the local structure shown;

[0022] Figure 3 for Figure 1 The structural schematic diagram of the limiting structure shown;

[0023] Figure 4 for Figure 1 A schematic diagram of a local structure of the limiting structure shown;

[0024] Figure 5 for Figure 1 A schematic diagram of the auxiliary structure shown.

[0025] Numbers in the figure: 1. Base plate; 2. Support plate; 3. Limiting structure; 301. Large cylinder; 302. Pressure head; 303. Small cylinder; 304. Sealing head; 305. Hand lever valve; 306. Total air source inlet; 307. Three-way quick connector; 308. First speed regulating valve; 309. Second speed regulating valve; 310. Sealing pad; 311. Positioning pin; 4. Auxiliary structure; 401. Connecting pipe; 402. Adjusting ring; 403. Slip ring; 404. Top block; 405. Connecting block; 406. Arc plate; 407. Partition plate; 408. Positioning rod; 409. Spring; 410. Limiting plate; 411. Limiting rod; 5. Mounting plate; 6. Workpiece body; 7. Inlet hose. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0028] See also Figures 1 to 4 A pneumatic leakage detection device provided by an embodiment of the utility model includes: a base plate 1 and an air intake hose 7, a support plate 2 is fixedly connected to the upper surface of the base plate 1, a mounting plate 5 is fixedly connected to the upper surface of the support plate 2, a workpiece body 6 is arranged on the inner wall of the base plate 1, a limiting structure 3 is arranged on the upper surface of the mounting plate 5, and an auxiliary structure 4 is arranged at the lower end of the total air source inlet 306.

[0029] In the embodiments of the present invention, please refer to Figure 3 and Figure 4The limiting structure 3 includes a large cylinder 301, which is fixedly connected to the upper surface of the mounting plate 5, and a pressure head 302 is fixedly connected to the output end of the large cylinder 301. A small cylinder 303 is fixedly connected to one side of the bottom plate 1, and a sealing head 304 is fixedly connected to the output end of the small cylinder 303. A hand valve 305 is installed on one side of the support plate 2. The lower surface of the hand valve 305 is connected to the total gas source inlet 306, and the upper surface of the hand valve 305 is fixedly connected to a three-way quick connector 3 07. One end of the three-way quick connector 307 is connected to the first speed regulating valve 308 by means of a conduit, and the first speed regulating valve 308 is connected to the large cylinder 301. One end of the three-way quick connector 307 is connected to the second speed regulating valve 309 by means of a conduit, and the second speed regulating valve 309 is connected to the small cylinder 303. A sealing gasket 310 is fixedly connected to the upper surface of the base plate 1, and the upper surface of the sealing gasket 310 is in contact with the workpiece body 6. Two positioning pins 311 are fixedly connected to the upper surface of the base plate 1.

[0030] In the embodiments of the present invention, please refer to Figure 5 The auxiliary structure 4 includes a connecting pipe 401, the upper end of which is connected to the main air source inlet 306, and the connecting pipe 401 is sleeved on the outside of the air intake hose 7. The outer wall of the connecting pipe 401 is threadedly connected with an adjusting ring 402, and the outer wall of the connecting pipe 401 is slidably connected with a slip ring 403. The upper surface of the slip ring 403 is fixedly connected with a plurality of top blocks 404, and the outer wall of the connecting pipe 401 is slidably penetrated with a plurality of connecting blocks 405. The cross-section of the connecting block 405 is a right-angled trapezoid, and the cross-section of the top block 404 is a right-angled trapezoid. One side of the connecting block 405 is fixedly connected with an arc plate 406. By setting the auxiliary structure 4, after the air intake hose 7 is connected to the main air source inlet 306, the personnel can easily adjust the arc plate 406 to squeeze and limit the air intake hose 7, thereby avoiding the air intake hose 7 connected to the air pump from being unstable due to the air pressure and the main air source inlet 306, thereby achieving the effect of improving the overall operation stability of the pneumatic leakage detection equipment. The upper surface of the block 405 is fixedly connected with a partition 407, and a positioning rod 408 is slidably penetrated on the side of the partition 407. The arc surface of the positioning rod 408 is sleeved with a spring 409. The two ends of the spring 409 are respectively fixedly connected to the connecting pipe 401 and the partition 407. After the top block 404 is separated from the connecting block 405, the spring 409 can drive the connecting block 405 to move quickly away from the air intake hose 7, and the connecting block 405 drives the arc plate 406, so that the arc plate 406 In order to achieve the effect of being able to be quickly separated from the air intake hose 7, the outer wall of the slip ring 403 is fixedly connected to the limit plate 410, and a limit rod 411 is slidably penetrated through the surface of the limit plate 410, and one end of the limit rod 411 is fixedly connected to the outer wall of the connecting tube 401. When the slip ring 403 moves along the arc surface of the connecting tube 401, the limit plate 410 fixed on the slip ring 403 will move along the arc surface of the limit rod 411, thereby achieving the effect of avoiding rotational deviation of the slip ring 403 during the movement process.

[0031] The working principle of a pneumatic leakage detection device provided by the utility model is as follows: all chambers are clamped and sealed at one time by using the positioning pin 311 and the cylinder on the tooling, and at the same time, an air vent connected to the corresponding chamber is opened on the tooling, and the other end of the air vent is connected to the air pipe of the detection instrument through a quick connector, and a first speed regulating valve 308 is installed on the large cylinder 301, and a second speed regulating valve 309 is installed on the small cylinder 303, which can control the action sequence and speed of the large cylinder 301 and the small cylinder 303. The cylinder gas source is controlled by a five-port three-position center-sealed hand-operated valve 305. The gas source is first connected to the gas source inlet of the hand-operated valve 305, and then connected to the air pipe at the two outlets, and the air pipe is respectively connected to a three-way quick connector 307, a three-way quick connector The other two interfaces of 307 are connected to the extension and retraction chambers of the large cylinder 301 and the small cylinder 303 respectively to control the extension and retraction of the cylinder; when detecting leakage, the product to be detected is first placed on the tooling through the positioning pin 311, and then the hand-operated valve 305 is started. The large cylinder 301 on the upper side first drives the pressure head 302 to press the product and form a seal with the sealing gasket 310 in the lower chamber. Then the small cylinder 303 on the side moves to push the sealing head 304 on the tooling. The sealing head 304 is equipped with a sealing ring to form a seal with another chamber. Finally, two leakage detectors are started to first detect the leakage value of the first and second chambers of the product (the two chambers of the lower end sealing gasket 310). After the detection is completed, another leakage detector is started to detect the leakage value of the side chamber. Finally, the hand-operated valve 305 is closed and the cylinder retracts quickly. At this point, all product leakage detection has been completed. This is a work cycle, which improves the connection method between tooling and products. The original seal was formed by threaded connection, but now it is formed by pressing with a cylinder to avoid product assembly damage. At the same time, the detection of several processes is concentrated on one detection tool, which simplifies the process, improves efficiency, reduces the labor intensity of employees, and saves production costs.

[0032] After the total air source inlet 306 is connected to the air intake hose 7, the adjusting ring 402 is first rotated to move along the arc surface of the connecting tube 401, so that the adjusting ring 402 squeezes the slip ring 403, and the slip ring 403 drives the top block 404, and the top block 404 squeezes the connecting block 405. The connecting block 405, driven by the top block 404, drives the arc plate 406 to squeeze the outer wall of the air intake hose 7. When the extrusion is completed, the air intake hose 7 can be limited. When it is necessary to separate the arc plate 406 from the air intake hose 7, the adjusting ring 402 is rotated in the opposite direction to separate the slip ring 403. At this time, the spring 409 drives the connecting block 405 to move away from the air intake hose 7. The connecting block 405 drives the arc plate 406. At this time, the arc plate 406 can be driven to separate from the air intake hose 7, wherein the slip ring 403 moves along the arc of the connecting tube 401. When the surface moves, the limit plate 410 fixed on the slip ring 403 will move along the arc surface of the limit rod 411, thereby achieving the effect of avoiding rotational deviation during the movement of the slip ring 403. In addition, after the top block 404 is separated from the connecting block 405, the spring 409 can drive the connecting block 405 to quickly move away from the air intake hose 7, and the connecting block 405 drives the arc plate 406, thereby achieving the effect of enabling the arc plate 406 to be quickly separated from the air intake hose 7. By setting the auxiliary structure 4, after the air intake hose 7 is connected to the main air source inlet 306, the personnel can easily adjust the arc plate 406 to squeeze and limit the air intake hose 7, thereby avoiding the air intake hose 7 connected to the air pump from being unstable due to the air pressure and the main air source inlet 306, thereby achieving the effect of improving the overall operation stability of the pneumatic leakage detection equipment.

[0033] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pneumatic leak detection device, characterized in that: include: A base plate (1) and an air intake hose (7), wherein the upper surface of the base plate (1) is fixedly connected to a support plate (2), the upper surface of the support plate (2) is fixedly connected to a mounting plate (5), the inner wall of the base plate (1) is provided with a workpiece body (6), the upper surface of the mounting plate (5) is provided with a limiting structure (3), the limiting structure (3) comprises a large cylinder (301), the large cylinder (301) is fixedly connected to the upper surface of the mounting plate (5), the output end of the large cylinder (301) is fixedly connected to a pressure head (302), one side of the base plate (1) is fixedly connected to a small cylinder (303), the output end of the small cylinder (303) is fixedly connected to a sealing head (304).

2. A pneumatic leak detection device according to claim 1, characterized in that: A hand-operated valve (305) is installed on one side of the support plate (2); the lower surface of the hand-operated valve (305) is connected to a total gas source inlet (306); the upper surface of the hand-operated valve (305) is fixedly connected to a three-way quick connector (307); one end of the three-way quick connector (307) is connected to a first speed regulating valve (308) via a conduit; the first speed regulating valve (308) is connected to the large cylinder (301); one end of the three-way quick connector (307) is connected to a second speed regulating valve (309) via a conduit; the second speed regulating valve (309) is connected to the small cylinder (303).

3. A pneumatic leak detection device according to claim 1, characterized in that: A sealing gasket (310) is fixedly connected to the upper surface of the bottom plate (1), and the upper surface of the sealing gasket (310) is in contact with the workpiece body (6).

4. The pneumatic leak detection device according to claim 1, characterized in that: Two positioning pins (311) are fixedly connected to the upper surface of the bottom plate (1).

5. The pneumatic leak detection device according to claim 2, characterized in that: An auxiliary structure (4) is provided at the lower end of the total gas source inlet (306), and the auxiliary structure (4) comprises a connecting pipe (401). The upper end of the connecting pipe (401) is connected to the total gas source inlet (306), and the connecting pipe (401) is sleeved on the outside of the air intake hose (7). The outer wall of the connecting pipe (401) is threadedly connected with an adjusting ring (402), and the outer wall of the connecting pipe (401) is slidably connected with a slip ring (403), and the upper surface of the slip ring (403) is fixedly connected with a plurality of top blocks (404), and the outer wall of the connecting pipe (401) is slidably penetrated with a plurality of connecting blocks (405), the cross section of the connecting block (405) is a right-angled trapezoid, and the cross section of the top block (404) is a right-angled trapezoid, and one side of the connecting block (405) is fixedly connected with an arc plate (406).

6. A pneumatic leak detection device according to claim 5, characterized in that: A partition (407) is fixedly connected to the upper surface of the connecting block (405), a positioning rod (408) is slidably penetrated through the side surface of the partition (407), a spring (409) is sleeved on the arc surface of the positioning rod (408), and two ends of the spring (409) are fixedly connected to the connecting tube (401) and the partition (407) respectively.

7. A pneumatic leak detection device according to claim 5, characterized in that: The outer wall of the slip ring (403) is fixedly connected to a limit plate (410), a limit rod (411) is slidably penetrated through the surface of the limit plate (410), and one end of the limit rod (411) is fixedly connected to the outer wall of the connecting tube (401).

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