Internal and external leakage airtightness testing mechanism

Abstract

The utility model discloses an internal and external leakage air tightness test mechanism, which comprises a loading disc, a sealing chassis is arranged at the center of the upper end of the loading disc, a plurality of inner cavity sealing assemblies are circumferentially distributed at the outer end of the sealing chassis, and an outer cavity sealing assembly is arranged right above the sealing chassis. Firstly, a product is placed on a clamp of a sealing chassis, at the moment, an air cylinder drives a horizontal airtightness testing plug to move, an air vent of an inner cavity of the product is plugged in an outer wrapping mode, then the interior of the product is inflated and subjected to pressure maintaining for a period of time, then internal air pressure loss is detected, whether the product leaks air or not is evaluated, and therefore airtightness detection of the inner cavity of the product is achieved. After the test is completed, the horizontal airtight test plug resets, the second cylinder presses down the sealing cover, inflates the interior of the sealing cover, performs airtight detection on the product outer cavity, and judges whether the product outer cavity is poor in sealing, so that simultaneous test operation of the inner cavity and the outer cavity can be realized, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtight testing, in particular to an internal and external leakage airtight testing mechanism. Background Art

[0002] An air tightness test is a test that uses gas as a pressurized medium to prevent leakage in equipment.

[0003] At present, the internal cavity of some products and the external cavity with electrical components are separated (such as electric control valves, etc.). When performing airtightness operation, it is necessary to perform airtightness operation on both the inner and outer cavities. At present, when performing airtightness operation on the inner and outer cavities, two devices for airtightness detection of the inner cavity and the outer cavity are required respectively, which undoubtedly greatly increases the overall manufacturing cost. Moreover, after the detection of one cavity is completed, the product needs to be manually transferred to another detection device. The time for intermediate transfer and installation will undoubtedly affect the overall detection efficiency.

[0004] In view of this, an internal and external leakage airtight testing mechanism is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an internal and external leakage airtight testing mechanism in order to solve the above-mentioned problems.

[0006] The technical solution adopted by the utility model is as follows: an internal and external leakage airtight testing mechanism, including a carrier, a sealing chassis is provided at the center of the upper end of the carrier, a plurality of inner cavity sealing components are circumferentially distributed on the outer end of the sealing chassis, and an outer cavity sealing component is provided directly above the sealing chassis, wherein: the inner cavity sealing component includes a cylinder and a horizontal sealing plug, the horizontal sealing plug is connected to the telescopic end of the cylinder through a connecting plate, and is used to drive the horizontal sealing plug to move horizontally; the outer cavity sealing component includes a sealing cover and a second cylinder, the telescopic end of the second cylinder is connected to the top wall of the sealing cover, and is used to drive the sealing cover to move up and down.

[0007] In a preferred embodiment, both the horizontal sealing plug and the sealing cover are equipped with an air pipe joint, and an inflatable component is detachably connected to the air pipe joint.

[0008] In a preferred embodiment, the horizontal sealing plug and the sealing cover are also equipped with electronic pressure gauges.

[0009] In a preferred embodiment, an O-ring is embedded in the inner wall of the horizontal sealing plug and the bottom wall of the sealing cover. The sealing cover is located directly above the sealing bottom plate, and the diameter of the sealing cover is smaller than the diameter of the sealing bottom plate.

[0010] In a preferred embodiment, the upper end surface of the sealing bottom plate is provided with a clamp for fixing the product.

[0011] In a preferred embodiment, support rods are installed at the four corners of the upper end of the carrier, a support cross plate is installed at the upper end of the support rods, the second cylinder is installed on the upper end surface of the support cross plate, and the cylinder is installed on the upper end surface of the carrier.

[0012] In a preferred embodiment, a plurality of guide members are circumferentially arranged between the sealing cover and the supporting transverse plate, and the guide members include a guide sleeve and a guide column, the guide sleeve is mounted on the supporting transverse plate, and the guide column is slidably mounted in the guide sleeve and connected to the upper end surface of the sealing cover.

[0013] In a preferred embodiment, four ends of the carrier are threadedly mounted with rubber-head bolts, and the bottom of the support rod protrudes downward to form a positioning rod.

[0014] In a preferred embodiment, a PLC terminal is also provided on the carrier plate, and the cylinder, the second cylinder and the electronic barometer are all controlled by the PLC terminal.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] 1. In the utility model, an inner cavity sealing component and an outer cavity sealing component are designed on the carrier. First, the product is placed on the fixture, and the cylinder drives the horizontal airtight test plug to move, and the vent of the inner cavity of the product is blocked by the outer package, so that the inner cavity of the product can be tested for airtightness. After the test is completed, the second cylinder presses down the sealing cover, inflates the inside of the sealing cover, and performs airtightness test on the outer cavity of the product, which can realize the simultaneous test operation of the inner and outer cavities and improve the test efficiency;

[0017] 2. In the present invention, except for taking and placing the workpiece, the air tightness detection of the inner and outer cavities of the product is all automated, which can greatly save manpower. At the same time, the use of automated operation can improve the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the planar structure of the utility model as a whole;

[0020] Figure 3 It is a schematic diagram of the planar structure of the utility model as a whole from a side view.

[0021] Markings in the figure: 1-second cylinder, 2-support cross plate, 3-guide, 4-sealing cover, 5-support rod, 6-O-ring, 7-carrying plate, 8-PLC end, 9-horizontal sealing plug, 10-connecting plate, 11-rubber head bolt, 12-cylinder, 13-electronic pressure gauge, 14-sealed chassis, 15-trachea joint. DETAILED DESCRIPTION

[0022] 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.

[0023] Reference Figure 1-3 , an internal and external leakage airtight testing mechanism, including a carrier 7, a sealing chassis 14 is provided at the center of the upper end of the carrier 7, a plurality of inner cavity sealing components are circumferentially distributed on the outer end of the sealing chassis 14, an outer cavity sealing component is provided directly above the sealing chassis 14, the inner cavity sealing component includes a cylinder 12 and a horizontal sealing plug 9, the horizontal sealing plug 9 is connected to the telescopic end of the cylinder 12 through a connecting plate 10, and is used to drive the horizontal sealing plug 9 to move horizontally, and a clamp for fixing the product is provided on the upper end surface of the sealing chassis 14. First, the product is placed on the clamp, and the position of the product is assisted by the clamp to ensure the subsequent normal detection operation, and the cylinder 12 drives the horizontal airtight test plug 9 to move, and the vent of the inner cavity of the product is blocked by an outsourcing method, so that the inner cavity of the product can be automatically airtight. Test.

[0024] It should be noted that the clamp is a mechanical device used to fix and position the workpiece, which is an existing feasible technology, and the device is not limited to one product. The clamp can be set according to different products. Therefore, in this embodiment, the specific structure of the clamp will not be explained.

[0025] Furthermore, the outer cavity sealing assembly includes a sealing cover 4 and a second cylinder 1. The telescopic end of the second cylinder 1 is connected to the top wall of the sealing cover 4 to drive the sealing cover 4 to move up and down. When the internal cavity inspection is completed, the second cylinder 1 presses down the sealing cover 4 and inflates the inside of the sealing cover 4, so that the outer cavity of the product can be airtightly inspected (such as the electrical control cavity is airtightly inspected to determine whether the electrical cavity sealant is sealed). This can realize simultaneous testing of the inner and outer cavities and improve inspection efficiency. Moreover, since the inner cavity sealing assembly and the outer cavity sealing assembly are integrated together, no additional transfer operation is required, which can improve work efficiency while saving manpower.

[0026] In this embodiment, the horizontal sealing plug 9 and the sealing cover 4 are both installed with an air pipe joint 15, and an inflatable component is detachably connected to the air pipe joint 15. By inflating the horizontal sealing plug 9 and the sealing cover 4 with the inflatable component, the corresponding air tightness detection operation can be performed (during the detection, the pressure needs to be maintained for a period of time).

[0027] The inflatable part includes an air pump (with an air pressure gauge) and an air tube, and the air tube is connected to the organ joint 15 and the air pump.

[0028] In this embodiment, the horizontal sealing plug 9 and the sealing cover 4 are also installed with an electronic pressure gauge 13, and a PLC terminal 8 is also provided on the carrier plate 7. The cylinder 12, the second cylinder 1 and the electronic pressure gauge 13 are all controlled by the PLC terminal 8. The electronic pressure gauge 13 can monitor the air pressure changes inside the horizontal sealing plug 9 and the sealing cover 4 and compare them with the set normal range value, so as to know whether the product has poor sealing.

[0029] In this embodiment, the inner wall of the horizontal sealing plug 9 and the bottom wall of the sealing cover 4 are both embedded with O-rings 6. The sealing cover 4 is located directly above the sealing chassis 14. The diameter of the sealing cover 4 is smaller than the diameter of the sealing chassis 14. The O-rings can ensure that the horizontal sealing plug 9 blocks the outer cavity of the product and the sealing cover 4 is installed on the sealing chassis 14 to ensure sealing, thereby ensuring the accuracy during detection.

[0030] In this embodiment, support rods 5 are installed at the four corners of the upper end of the carrier plate 7, and a supporting cross plate 2 is installed at the upper end of the support rods 5. The second cylinder 1 is installed on the upper end surface of the supporting cross plate 2, and the cylinder 12 is installed on the upper end surface of the carrier plate 7. A plurality of guide members 3 are circumferentially arranged between the sealing cover 4 and the supporting cross plate 2. The guide member 3 includes a guide sleeve and a guide column. The guide sleeve is installed on the supporting cross plate 2, and the guide column is slidably installed in the guide sleeve and connected to the upper end surface of the sealing cover 4. The guide member 3 can ensure the stability of the sealing cover 4 when it rises and falls, thereby ensuring the combination accuracy of the sealing cover 4 and the sealing chassis 14.

[0031] In this embodiment, the four ends of the carrier plate 7 are threadedly installed with rubber head bolts 11, the bottom of the support rod 5 protrudes downward to form a positioning rod, and the carrier plate 7 is installed on a corresponding test bench (not shown in the figure). The test bench is correspondingly designed with threaded holes that meet the threaded installation of the rubber head bolts 11 and positioning holes that meet the insertion of the positioning rod. When it is necessary to test other products, the rubber head bolts 11 are removed upwards, the test mechanism can be taken out as a whole, and the corresponding test mechanism can be replaced, which is more convenient to replace.

[0032] In addition, the inflatable parts can also be installed on the test bench accordingly.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal and external leakage airtightness testing mechanism, comprising a carrier plate, characterized in that: A sealing bottom plate is provided at the center of the upper end of the carrier plate, and a plurality of inner cavity sealing components are circumferentially distributed on the outer end of the sealing bottom plate. An outer cavity sealing component is provided directly above the sealing bottom plate, wherein: The inner cavity sealing assembly includes a cylinder and a horizontal sealing plug, wherein the horizontal sealing plug is connected to the telescopic end of the cylinder through a connecting plate, and is used to drive the horizontal sealing plug to move horizontally; The outer cavity sealing assembly includes a sealing cover and a second cylinder, wherein the telescopic end of the second cylinder is connected to the top wall of the sealing cover to drive the sealing cover to move up and down.

2. An internal and external leakage airtightness testing mechanism as claimed in claim 1, characterized in that: The horizontal sealing plug and the sealing cover are both equipped with an air pipe joint, and an inflatable component is detachably connected to the air pipe joint.

3. An internal and external leakage airtightness testing mechanism as claimed in claim 1, characterized in that: The horizontal sealing plug and the sealing cover are also equipped with electronic pressure gauges.

4. The internal and external leakage airtightness testing mechanism according to claim 1, characterized in that: The inner wall of the horizontal sealing plug and the bottom wall of the sealing cover are both embedded with O-rings. The sealing cover is located directly above the sealing bottom plate, and the diameter of the sealing cover is smaller than the diameter of the sealing bottom plate.

5. The internal and external leakage airtightness testing mechanism according to claim 1, characterized in that: The upper end surface of the sealing bottom plate is provided with a clamp for fixing the product.

6. The internal and external leakage airtightness testing mechanism according to claim 1, characterized in that: The four corners of the upper end of the carrier are equipped with support rods, the upper ends of the support rods are equipped with support cross plates, the second cylinder is installed on the upper end surface of the support cross plates, and the cylinder is installed on the upper end surface of the carrier.

7. An internal and external leakage airtightness testing mechanism as claimed in claim 6, characterized in that: A plurality of guide members are circumferentially arranged between the sealing cover and the supporting transverse plate, and the guide members include a guide sleeve and a guide column. The guide sleeve is mounted on the supporting transverse plate, and the guide column is slidably mounted in the guide sleeve and connected to the upper end surface of the sealing cover.

8. An internal and external leakage airtightness testing mechanism as claimed in claim 6, characterized in that: The four ends of the carrier are threadedly mounted with rubber-head bolts, and the bottom of the support rod protrudes downward to form a positioning rod.

9. The internal and external leakage airtightness testing mechanism according to claim 1, characterized in that: The carrier plate is also provided with a PLC terminal, and the cylinder, the second cylinder and the electronic barometer are all controlled by the PLC terminal.

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