Pipe gas tightness detection joint device, pipe gas tightness detection system and method

Abstract

The application discloses a pipeline airtightness detection joint device, a pipeline airtightness detection system and a pipeline airtightness detection method, which are used for strengthening the sealing effect of a pipe joint, locking and positioning the inserted pipe joint, and making the to-be-tested pipeline meet high-pressure detection conditions. The pipeline airtightness detection joint device comprises an end sealing assembly, an outer wall sealing assembly and a pushing assembly. The outer wall sealing assembly is sleeved on the end sealing assembly, the front end of the outer wall sealing assembly is extended out of the end sealing assembly and is provided with a plug-in channel, an airflow channel communicated with the plug-in channel is arranged in the end sealing assembly, the end sealing assembly comprises an end sealing piece, at least part of the structure of the end sealing piece faces the plug-in channel, the outer wall sealing assembly comprises an outer wall sealing piece arranged in the plug-in channel, and the pushing assembly is slidably arranged on the outer wall sealing assembly or the end sealing assembly. The outer wall sealing piece is deformed by the pushing of the sliding pushing assembly, so as to embrace and clamp the pipe joint inserted into the plug-in channel.

Description

Technical Field

[0001] This invention relates to the field of pipeline airtightness testing, and more particularly to pipeline airtightness testing joint devices, pipeline airtightness testing systems and methods. Background Technology

[0002] In industrial production, lubrication is crucial for high-speed, precision machinery. Oil-air distributors provide precise, controllable, stable, and quantitative lubrication to lubrication points. They mix lubricating oil and compressed air to form an oil film, which is then propelled along the inner wall of the high-pressure pipe to the lubrication points by the flow of compressed air. High-pressure pipes must be kept sealed during use to prevent leakage of the medium inside. Leakage can lead to lubrication failure and even safety accidents. Therefore, airtightness testing is typically performed on high-pressure pipes before leaving the factory or before use. High-pressure pipes have metal fittings at both ends. Testing is performed after connecting the fittings to a fitting device. However, current fitting devices only provide side sealing of the fittings, lacking sufficient sealing at the ends, resulting in less than ideal sealing performance. Furthermore, current high-pressure pipe testing procedures are numerous and somewhat cumbersome.

[0003] Therefore, there is an urgent need to provide a pipe air tightness testing device, pipe air tightness testing system and method that can help improve the sealing effect of pipe joints to overcome the above-mentioned defects. Summary of the Invention

[0004] The purpose of this invention is to provide a pipe airtightness testing joint device that helps to enhance the sealing effect of pipe joints.

[0005] To achieve the above objectives, the pipe airtightness testing connector device provided by the present invention is suitable for clamping and sealing inserted pipe connectors. It includes an end sealing component, an outer wall sealing component, and a pushing component. The outer wall sealing component is fitted onto the end sealing component. The front end of the outer wall sealing component extends forward from the end sealing component and is provided with an insertion channel. The end sealing component is provided with an airflow channel communicating with the insertion channel. The end sealing component includes an end seal, at least a portion of which faces the insertion channel. The outer wall sealing component includes an outer wall seal disposed in the insertion channel. The pushing component is slidably disposed on the outer wall sealing component or the end sealing component. The outer wall seal is deformed by the pushing of the sliding pushing component, thereby clamping the pipe connector inserted into the insertion channel.

[0006] Preferably, the end sealing assembly also includes an inner tube with an airflow channel inside, and the end seal is fitted onto the front end of the inner tube.

[0007] Preferably, the outer wall sealing assembly also includes a middle tube fitted inside the inner tube, with the front end of the middle tube extending forward beyond the inner tube and forming an insertion channel, and at least a portion of the structure of the outer wall seal is disposed in the insertion channel.

[0008] Preferably, the pushing assembly includes an outer tube and a pushing member. The outer tube is slidably disposed within the middle tube or inner tube, and the pushing member is sleeved inside the outer tube. The sliding linkage of the outer tube with the middle tube or inner tube causes the pushing member to push against the outer wall seal.

[0009] Preferably, the pusher is slidably disposed inside the outer tube along the central axis of the insertion channel.

[0010] Preferably, the extrusion assembly includes an elastic element, the front end of the outer tube is provided with a closing ring, the rear end of the outer tube is open, the front end of the extrusion element is located in the space enclosed by the closing ring, the rear end of the extrusion element forms a structural ring, the elastic element is located inside the outer tube and between the closing ring and the structural ring, and the elastic element always has a tendency to drive the closing ring and the structural ring away from each other.

[0011] Preferably, part of the outer wall seal is located outside the middle tube and directly opposite the structural ring.

[0012] This invention also provides a pipeline airtightness testing system, which helps to enhance the sealing effect of pipe joints, thereby meeting the high-pressure testing conditions of the pipeline under test. The pipeline airtightness testing system of this invention is suitable for airtightness testing of pipelines with pipe joints installed at both ends. It includes at least one pair of pipeline airtightness testing joint devices. The pipe joints at both ends are respectively inserted into the insertion channels of each pair of pipeline airtightness testing joint devices and clamped and sealed. Each pair of pipeline airtightness testing joint devices and the inner cavity of the pipeline under test form a sealed cavity to be tested.

[0013] Preferably, the pipeline airtightness testing system of the present invention further includes an air source, a solenoid valve, a pressure detection device and a control device connected in sequence. The control device is connected to the sealed cavity to be tested. The solenoid valve can selectively open or close the connection between the air source and the sealed cavity to be tested. The control device controls the solenoid valve to switch to the open state or the closed state according to the air pressure detected by the pressure detection device.

[0014] This invention also provides a method for testing the airtightness of a pipeline, applicable to testing the airtightness of a pipeline with pipe fittings installed at both ends, comprising the following steps:

[0015] Step S1: Install a plug into the insertion channel of the pipe airtightness testing connector and test the airtightness of the device itself. If the airtightness is good, remove the plug.

[0016] Step S2: Insert the pipe fitting into the insertion channel and press the pipe fitting against the end seal;

[0017] Step S3: The sliding pushing assembly pushes against the outer wall seal, so that the pipe joints at both ends are clamped and sealed.

[0018] Step S4: The solenoid valve opens, allowing the air source to supply air to the sealed cavity to be tested. When the pressure detection device detects that the air pressure of the sealed cavity to be tested reaches the preset value, the control device controls the solenoid valve to close, and performs air injection and pressure maintenance.

[0019] Step S5: Within a preset time range, if the pressure of the sealed cavity to be tested remains unchanged, or the pressure of the sealed cavity to be tested drops within the specified range, the airtightness of the pipeline to be tested is determined to be qualified; otherwise, the airtightness of the pipeline to be tested is determined to be unqualified.

[0020] Step S6: The push assembly is reset, the pipe airtightness testing connector device loosens its clamp on the pipe connector, the pipe connector is pulled out, and the pipes to be tested are sorted according to the test results.

[0021] Compared with existing technologies, the pipe airtightness testing connector device, pipe airtightness testing system, and method according to the present invention seal the end face and side of the pipe connector by means of end sealing components and outer wall sealing components on the end sealing component and the outer wall sealing component, respectively, thereby sealing the cavity of the pipe under test. The solenoid valve is opened, and the air source supplies air. Air is injected into the sealed cavity under test through the pipe airtightness testing connector device to test the airtightness of the pipe under test. This is convenient, practical, improves testing efficiency, and ensures the accuracy of the test results. Using the pipe airtightness testing connector device of the present invention, the inserted pipe connector abuts against the end sealing component, satisfying the sealing requirement for the end face of the pipe connector. The outer wall sealing component encircles and clamps the pipe connector inserted into the insertion channel, sealing the side of the pipe connector, thereby achieving the sealing requirements for both the end face and side of the pipe connector. Furthermore, the inserted pipe connector is locked and positioned, allowing for high-pressure testing conditions during airtightness testing. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the pipe airtightness testing connector device of the present invention when the pipe connector is inserted into the insertion channel.

[0023] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the pipeline airtightness testing device after the pipe joint has been pulled out.

[0024] Figure 3 This is a schematic diagram of the structure of the pipeline airtightness testing system of the present invention during the testing of the pipeline under test. Detailed Implementation

[0025] To illustrate the technical content and structural features of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] like Figure 3As shown, this invention provides a pipe airtightness testing connector device 100, suitable for clamping and sealing inserted pipe connectors 210. Pipe connectors 210 are metal tubes installed at both ends of a rubber hose 220. Pipe connectors 210 and rubber hose 220 form a high-pressure pipe 200, which is used for conveying oil films. It is worth noting that pipe connectors 210 are metal tubes, which have higher rigidity than rubber hoses, but slightly inferior fit. Therefore, sealing only the sides is insufficient; both sides and ends need to be sealed simultaneously to meet the sealing test requirements. It is also worth noting that this invention does not limit pipe connectors 210 to only metal tubes, but rather illustrates one application scenario. Depending on actual testing needs, pipe connectors 210 can be applied to materials such as rubber hoses, glass tubes, or ceramic tubes.

[0027] like Figure 1 and Figure 2 As shown, the pipe airtightness testing connector device 100 of the present invention includes an end sealing assembly 10, an outer wall sealing assembly 20, and a pushing assembly 30. The outer wall sealing assembly 20 is fitted onto the end sealing assembly 10, and the front end of the outer wall sealing assembly 20 extends forward from the end sealing assembly 10 and is provided with an insertion channel 21. An airflow channel 11 communicating with the insertion channel 21 is provided inside the end sealing assembly 10. The end sealing assembly 10 includes an end seal 12, at least a portion of which faces the insertion channel 21. The outer wall sealing assembly 20 includes an outer wall seal 22 disposed in the insertion channel 21. The pushing assembly 30 is slidably disposed on the outer wall sealing assembly 20, and the outer wall seal 22 is deformed by the pushing of the sliding pushing assembly 30, thereby encircling and clamping the pipe connector 210 inserted into the insertion channel 21.

[0028] By inserting the pipe connector 210 into the insertion channel 21, the inserted pipe connector 210 abuts against the end seal 12, satisfying the sealing requirement for the end face of the pipe connector 210. The outer wall seal 22, after clamping the pipe connector 210 inserted into the insertion channel 21, satisfies the sealing requirement for the side of the pipe connector 210 and locks the inserted pipe connector 210 in place. During airtightness testing, it can withstand high-pressure conditions. Preferably, the end seal 12 and the outer wall seal 22 are made of rubber or silicone, providing good sealing performance and easy compression deformation. In the embodiment provided above, the pushing assembly 30 slides on the outer wall sealing assembly 20; however, the pushing assembly 30 can also be configured to slide on the end sealing assembly 10.

[0029] like Figure 1 and Figure 2 As shown, the end sealing assembly 10 also includes an inner tube 13, which has an airflow channel 11. The end seal 12 is sleeved on the front end of the inner tube 13. The airflow channel 11 is used to inject air into the pipe connector 210. The injected compressed air flows into the pipe to be tested (i.e., the hose 220) through the pipe connector 210.

[0030] like Figure 1 and Figure 2 As shown, the outer wall sealing assembly 20 also includes a middle tube 23, which is fitted onto the inner tube 13. The front end of the middle tube 23 extends forward beyond the inner tube 13 and forms an insertion channel 21. At least a portion of the structure of the outer wall seal 22 is disposed in the insertion channel 21. Preferably, the middle tube 23 and the inner tube 13 are fixed to each other by a threaded connection, but depending on actual needs, they can also be fixed to each other by a snap-fit ​​connection or other means. The outer wall seal 22 and the end seal 12 are generally annular. The inserted pipe connector 210 abuts against the front side of the end seal 12. In the embodiment provided by the present invention, a portion of the front side of the end seal 12 is aligned with the insertion channel 21, but this is not a limitation.

[0031] like Figure 1 and Figure 2 As shown, the pushing assembly 30 includes an outer tube 31 and a pushing member 32. In this invention, the outer tube 31 is slidably disposed within the middle tube 23, and the pushing member 32 is sleeved inside the outer tube 31. The sliding linkage between the outer tube 31 and the middle tube 23 causes the pushing member 32 to push against the outer wall seal 22. The pushing member 32 facilitates the pushing against and deforming of the inner outer wall seal 22. Preferably, the pushing member 32 is generally tubular. During testing, the pipe connector 210 is inserted into the pushing member 32 and then into the insertion channel 21. In the embodiment provided by this invention, the pushing member 32, the outer tube 31, the middle tube 23, and the inner tube 13 are arranged coaxially, and the pipe connector 210 inserted into the insertion channel 21 achieves adaptive centering positioning. The pushing member 32 slides axially within the outer tube 31 along the central axis A of the insertion channel 21. Preferably, the pusher 32 is a metal structure, and the outer tube 31, middle tube 23 and inner tube 13 are also metal structures, but not limited to these. Preferably, the outer tube 31 is driven to slide by a cylinder, motor or the like.

[0032] like Figure 1 and Figure 2As shown, the pushing assembly 30 also includes an elastic element 33. The front end of the outer tube 31 is provided with a closing ring 311, and the rear end of the outer tube 31 is open. The front end of the pushing element 32 is located within the space enclosed by the closing ring 311, and the rear end of the pushing element 32 forms a structural ring 321. The elastic element 33 is located inside the outer tube 31 and between the closing ring 311 and the structural ring 321. The elastic element 33 always has a tendency to drive the closing ring 311 and the structural ring 321 away from each other. When the outer tube 31 slides on the middle tube 23, it compresses the elastic element 33, thereby causing the pushing element 32 to push against the outer wall seal 22. After the outer tube 31 returns to its original position, the elastic element 33 unfolds again, causing the closing ring 311 and the structural ring 321 to move away from each other, thus resetting the pushing element 32. Furthermore, under the elastic force of the elastic element 33, the structural ring 321 always presses against the outer wall seal 22, pre-tightening the outer wall seal 22 and preventing it from dislodging from the insertion channel 21. Preferably, a portion of the structure of the outer wall seal 22 is located outside the central tube 23 and directly opposite the structural ring 321. By placing a portion of the structure of the outer wall seal 22 outside the central tube 23, the area of ​​the outer wall seal 22 facing the structural ring 321 is increased, facilitating the deformation of the outer wall seal 22 under pressure.

[0033] like Figure 3 As shown, the present invention also provides a pipeline airtightness testing system 1000, suitable for performing airtightness testing on a pipeline to be tested with pipe fittings 210 installed at both ends. The pipeline to be tested can be the aforementioned hose 220. The pipe fittings 210 and the hose 220 are assembled to form the aforementioned high-pressure pipe 200. The specific structural composition has been mentioned above and will not be repeated here. It is also worth noting that in the embodiments provided above, the pipe fittings 210 and the hose 220 are two independent products. However, in other embodiments, the pipe fittings 210 can be directly configured at both ends of the hose 220.

[0034] The pipeline airtightness testing system 1000 of the present invention includes at least one pair of the aforementioned pipeline airtightness testing connector devices 100. In the embodiment provided by the invention, for ease of explanation, one pair of pipeline airtightness testing connector devices 100 is illustrated, but it should be understood that the number can be more than one pair, such as two pairs, three pairs, four pairs, etc. Pipe fittings 210 located at both ends are respectively inserted into the insertion channels 21 of each pair of pipeline airtightness testing connector devices 100 and clamped and sealed. Each pair of pipeline airtightness testing connector devices 100 and the inner cavity of the pipeline to be tested form a sealed cavity to be tested. The airtightness of the high-pressure pipe 200 can be tested by injecting compressed air into the sealed cavity to be tested and maintaining the pressure.

[0035] Furthermore, the pipeline airtightness testing system 1000 provided by the present invention also includes a gas source 300, a solenoid valve 400, a pressure detection device 500, and a control device 600 connected in sequence. The control device 600 is connected to the aforementioned sealed cavity to be tested. The solenoid valve 400 selectively opens or closes the connection between the gas source 300 and the sealed cavity to be tested. The control device 600 controls the solenoid valve 400 to switch to the open or closed state according to the air pressure detected by the pressure detection device 500. When the solenoid valve 400 is open, the gas source 300 injects gas into the sealed cavity to be tested through the pipeline airtightness testing connector device 100.

[0036] The pressure detection device 500 is an electronic barometer, but a mechanical barometer can also be used. The control device 600 is a device with control logic circuitry, such as an industrial computer. The gas source 300 is high-pressure gas from the gas pipeline in the factory, but an air pump can also be configured. The solenoid valve 400 can use an existing structure.

[0037] The present invention also provides a method for testing the air tightness of a pipeline, which is applicable to testing the air tightness of a pipeline to be tested with pipe joints 210 installed at both ends, such as testing the air tightness of the high-pressure pipe 200 mentioned above.

[0038] The pipeline airtightness testing method of the present invention includes the following steps:

[0039] Step S1: Install a plug into the insertion channel 21 of the pipe airtightness testing connector device 100, test the airtightness of the device itself, and if the airtightness is good, remove the plug.

[0040] Step S2: Insert the pipe fitting 210 into the insertion channel 21 and make the pipe fitting 210 press against the end seal 12;

[0041] Step S3: The sliding pushing component 30 pushes the outer wall seal 22, so that the pipe joints 210 at both ends are clamped and sealed; at this time, the sealing of the end face and side of the pipe joint 210 is completed.

[0042] Step S4: Solenoid valve 400 opens, allowing air source 300 to supply air to the sealed cavity to be tested. When pressure detection device 500 detects that the air pressure of the sealed cavity to be tested reaches the preset value, control device 600 controls solenoid valve 400 to close, and performs air injection and pressure maintenance.

[0043] Step S5: Within a preset time range, if the pressure of the sealed cavity to be tested remains unchanged, or the pressure of the sealed cavity to be tested drops within the specified range, the airtightness of the pipeline to be tested is determined to be qualified; otherwise, the airtightness of the pipeline to be tested is determined to be unqualified.

[0044] Step S6: Push component 30 resets, pipe airtightness testing connector device 100 loosens clamping and sealing of pipe connector 210, pulls out pipe connector 210, and sorts the pipes to be tested according to the test results.

[0045] It should be noted that, in the embodiments provided by the present invention, since the pipe joint 210 is a metal structure, the structure is relatively compact and there are generally no leaks. The leaks are located in the pipe under test or at the connection between the pipe joint 210 and the pipe under test. Leaks at the above two locations are all attributed to the leaks in the pipe under test.

[0046] Figure 1 In the diagram, the direction indicated by arrow Y is from back to front, but it is not limited to this.

[0047] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are within the scope of the present invention.

Claims

1. A pipe airtightness testing fitting device, suitable for clamping and sealing inserted pipe fittings, characterized in that, The device includes an end sealing assembly, an outer wall sealing assembly, and a pushing assembly. The outer wall sealing assembly is fitted onto the end sealing assembly. The front end of the outer wall sealing assembly extends forward from the end sealing assembly and has an insertion channel. The end sealing assembly has an airflow channel communicating with the insertion channel. The end sealing assembly includes an end seal, at least a portion of which faces the insertion channel. The outer wall sealing assembly includes an outer wall seal disposed in the insertion channel. The pushing assembly slides onto the outer wall sealing assembly or the end sealing assembly. The outer wall seal deforms under the pushing force of the sliding pushing assembly, thereby clamping and securing the pipe fitting inserted into the insertion channel. The end sealing assembly also includes an inner tube containing the airflow channel, and the end seal is fitted onto the front end of the inner tube. The outer wall sealing assembly further includes a middle tube fitted onto the inner tube, the front end of the middle tube extending forward beyond the inner tube and enclosing the insertion channel, and at least a portion of the structure of the outer wall seal is disposed in the insertion channel; the pushing assembly includes an outer tube and a pushing member, the outer tube slidingly disposed on the middle tube or the inner tube, the pushing member being fitted inside the outer tube, and the sliding of the outer tube on the middle tube or the inner tube causing the pushing member to push the outer wall seal; the pushing assembly includes an elastic member, the front end of the outer tube having a closing ring, the rear end of the outer tube being open, the front end of the pushing member being disposed in the space enclosed by the closing ring, the rear end of the pushing member forming a structural ring, the elastic member being disposed inside the outer tube and between the closing ring and the structural ring, and the elastic member always having a tendency to drive the closing ring and the structural ring away from each other.

2. The pipe airtightness testing joint device according to claim 1, characterized in that, The pusher is slidably disposed inside the outer tube along the central axis of the insertion channel.

3. The pipe airtightness testing joint device according to claim 1, characterized in that, A portion of the outer wall seal is located outside the middle tube and directly opposite the structural ring.

4. A pipeline airtightness testing system, suitable for testing the airtightness of a pipeline with pipe fittings installed at both ends, characterized in that, The device includes at least one pair of pipe air tightness testing connectors as described in any one of claims 1-3, wherein the pipe connectors at both ends are respectively inserted into the insertion channel of each pair of pipe air tightness testing connectors and clamped and sealed, and each pair of pipe air tightness testing connectors forms a sealed cavity to be tested with the inner cavity of the pipe to be tested.

5. The pipeline airtightness testing system according to claim 4, characterized in that, It also includes a gas source, a solenoid valve, a pressure detection device, and a control device connected in sequence. The control device is connected to the sealed cavity to be tested. The solenoid valve selectively opens or closes the connection between the gas source and the sealed cavity to be tested. The control device controls the solenoid valve to switch to the open or closed state according to the gas pressure detected by the pressure detection device.

6. A method for testing the airtightness of a pipeline, comprising using the pipeline airtightness testing system as described in claim 5 to perform airtightness testing on a pipeline to be tested with pipe fittings installed at both ends, characterized in that, Includes the following steps: Step S1: Install a plug into the insertion channel of the pipe airtightness testing connector device, test the airtightness of the device itself, and if the airtightness is good, remove the plug; Step S2: Insert the pipe fitting into the insertion channel and press the pipe fitting against the end seal; Step S3: The sliding pushing assembly pushes the outer wall seal, so that the pipe joints at both ends are clamped and sealed. Step S4: The solenoid valve opens, allowing the air source to supply air to the sealed cavity to be tested. When the pressure detection device detects that the air pressure of the sealed cavity to be tested reaches the preset value, the control device controls the solenoid valve to close, and performs air injection and pressure maintenance. Step S5: Within a preset time range, if the pressure of the sealed cavity to be tested remains unchanged, or the pressure of the sealed cavity to be tested drops within the specified range, the airtightness of the pipeline to be tested is determined to be qualified; otherwise, the airtightness of the pipeline to be tested is determined to be unqualified. Step S6: The push assembly is reset, the pipe airtightness testing connector device loosens its clamp on the pipe connector, the pipe connector is pulled out, and the pipes to be tested are sorted according to the test results.

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