Gas pipeline gas tightness detection device and detection method thereof

Abstract

The invention belongs to the technical field of gas pipeline detection, and particularly relates to a gas pipeline airtightness detection device and a detection method thereof. Comprising an operation table, supporting stand columns capable of oppositely moving are symmetrically arranged on the operation table, the supporting stand columns are connected with a detection part, the detection part comprises a first frame body and a second frame body, and the first frame body and the second frame body are symmetrically arranged on the opposite sides of the supporting stand columns respectively. The first frame body and the second frame body abut against the interior to form a detection chamber, a clamping opening used for clamping a to-be-detected pipe fitting is formed in the detection chamber in the axis direction in a penetrating mode, a sealing component is arranged in the detection chamber, and the sealing component, the inner wall of the detection chamber and the to-be-detected pipe fitting form a sealed detection area; the detection area is connected with a detection air source input pipeline and an air pressure detection instrument; the to-be-detected pipe fitting is clamped and supported by the clamping ports at the front end and the rear end, and then detection gas is input into the detection area of the detection gas source input pipeline for airtightness detection, so that the detection efficiency is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas pipeline detection, and in particular relates to a gas pipeline air tightness detection device and a detection method thereof. Background Art

[0002] Only pipelines with good air tightness can ensure that a stable gas supply pressure is maintained during the gas transmission process. If there is a leak in the pipeline, the gas supply pressure will drop and cannot meet the normal gas demand of users, affecting the normal operation of gas equipment. Secondly, it will directly lead to the waste of gas resources. At the same time, when natural gas and other gases are mixed with air to a certain concentration range, they will explode when they encounter a fire source. Commonly used gas pipeline air tightness detection methods include soap water leak test method, pressure decay method, etc. Although these methods can detect pipeline leaks to a certain extent, they have problems such as complex operation, low detection accuracy, and great influence by environmental factors. At the same time, through other existing gas pipeline air tightness detection devices, through the sealed pipeline port, the test gas is injected into the inside to observe the matching pressure measuring instrument connected to the sealed pipeline to detect the sealing. There are problems such as long assembly and detection time, which affects the detection efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a gas pipeline air tightness detection device and a detection method thereof in order to solve the above-mentioned technical problems. The pipe to be tested is clamped and supported by the clamping openings at the front and rear ends, and then the detection gas is input into the detection area in the sealed chamber which is sealed by the sealing component, the inner wall of the detection chamber and the pipe to be tested through the detection gas source input pipeline, thereby effectively improving the detection efficiency.

[0004] In view of this, the present invention provides a gas pipeline air tightness detection device, including an operating table, on which supporting columns that can move toward each other are symmetrically arranged, and the supporting columns are connected to detection components, and the detection components include a first frame and a second frame, and the first frame and the second frame are symmetrically arranged on opposite sides of the supporting columns, respectively. Driven by the driving component, the first frame and the second frame are pressed against the inside to form a detection chamber, and a clamping port for clamping a pipe to be tested is arranged in the axial direction of the detection chamber, and a sealing component is arranged in the detection chamber, and the sealing component, the inner wall of the detection chamber and the pipe to be tested constitute a sealed detection area, and the detection area is connected to a detection gas source input pipeline and an air pressure detection instrument.

[0005] In the present technical scheme, the pipe to be tested is passed through the detection component, and the driving component drives the supporting columns symmetrically arranged on the operating table to move closer to each other. The detection component is arranged on the opposite sides of the supporting columns on both sides, and follows the supporting columns to move closer until the pipe to be tested is fixedly clamped. The assembly of the gas pipeline and the detection device is more convenient and simple to operate, which can significantly improve the detection efficiency. The operator can quickly complete the detection task and reduce the time consumption in the detection process. The pipe to be tested passes through the detection chamber formed by the first frame and the second frame, and the pipe to be tested is clamped and supported by the clamping openings at the front and rear ends. Then, gas is input into the detection area in the sealed chamber formed by the sealing component, the inner wall of the detection chamber and the pipe to be tested through the detection gas source input pipeline to increase the internal air pressure. According to the air pressure value displayed on the air pressure detection instrument connected to the detection area, it is judged whether the air tightness of the pipe to be tested in the detection area is good.

[0006] In the above technical solution, further, the sealing component includes a semi-annular support block arranged on the inner wall of the first frame and the second frame of the above-mentioned detection chamber, and the support block is provided with an installation groove along the circumference of the pipe to be tested on the side away from the inner wall of the detection chamber. The sealing airbag surrounds the pipe to be tested and is fixed in the installation groove formed by two sections spliced ​​together to form a ring, and the sealing airbag is connected to a sealing air source input pipeline.

[0007] In the present technical solution, gas is input into the sealing airbag in the installation groove through the sealing air source input pipeline, and the sealing airbags on both sides of the detection chamber expand together with the installation groove, the inner wall of the detection chamber and the pipe to be tested to form a sealed detection area. The sealed airbag is used to supply gas to quickly create a sealed detection area, which effectively improves the detection efficiency and has a good sealing effect, thereby ensuring the detection accuracy.

[0008] In the above technical scheme, further, a ventilation ring plate is arranged between the two support blocks, the ventilation ring plate is connected to the air source input pipeline and the air pressure detection instrument, an air inlet passage is arranged on the side of the ventilation ring plate away from the frame, the ventilation ring plate and the sealing component and the outer wall of the pipe to be tested constitute a sealing area, and the ventilation ring plate is fixedly arranged against the inner wall of the detection chamber.

[0009] In this technical solution, by setting up the ventilation ring plate, a sealing area is further formed in the detection area, and the detection gas input into the detection area through the detection gas source input pipeline can quickly fill the sealing area through the ventilation ring plate, further improving the detection efficiency.

[0010] In the above technical solution, further, a first through groove is provided along the circumference of the ventilation ring plate on the abutting side of the ventilation ring plate and the detection chamber, and a through air inlet passage is provided on the side of the first through groove away from the frame.

[0011] In the above technical solution, further, the air intake channel is arranged to penetrate the circumference along the length direction of the first through groove.

[0012] In the present technical solution, the detection gas input from the detection gas source input pipeline first enters the first through groove, and the first through groove and the detection area are connected by an air intake channel circumferentially arranged along the length direction of the first through groove. The detection gas entering the first through groove can enter the sealing area through each air intake channel, thereby ensuring the sealing efficiency of the detection gas in the sealing area is quickly filled and avoiding the influence of a single air intake point on the detection result.

[0013] In the above technical solution, further, a first slider is provided at the bottom of the support column, a first slide groove is provided on the operating table corresponding to the slider, the first slider passes through the first slide groove and is connected to the driving component in the operating table, the driving component includes a driving strip plate fixedly connected to the first slider, the driving strip plate is slidably arranged in the operating table along the length direction of the first slide groove, a rack structure is provided on one side of the driving strip plate, the rack structure is meshed with a first gear, the first gear is rotatably arranged in the operating table, a first worm gear is coaxially connected to the lower side of the first gear, the first worm gear is meshed with the tooth structure on the driving rod, the driving rod is rotatably connected in the operating table, and a first motor is coaxially fixedly connected to one side of the driving rod. Through the transmission connection of the driving rod, the first worm gear, the first gear and the driving strip plate, when the first motor drives the driving rod to rotate, the supporting columns on both sides can move closer to or farther from each other, so as to facilitate the rapid clamping or unclamping of the pipe to be tested.

[0014] In the above technical solution, further, a second slide groove penetrating the top is provided on the connection side between the support column and the frame, and a second sliding block capable of sliding in the second slide groove is fixedly connected to the frame corresponding to the support column.

[0015] In the above technical solution, further, the second slide groove abuts against a magnetic block embedded in the supporting column, the second slider is made of magnetic conductive material, and the second slider abuts against the magnetic block in the second slide groove after the frame is installed.

[0016] In the present technical solution, the second slider can be made of silicon steel sheet, and the magnetic block is an electromagnet. The silicon steel sheet is an iron alloy with a high silicon content and has excellent soft magnetic properties, such as low coercive force and high magnetic permeability. These characteristics enable the second slider to form a more stable magnetic connection after the magnetic block is energized, which facilitates the replacement of the corresponding first frame and the second frame when detecting pipes of different specifications.

[0017] Also included is a detection method for the gas pipeline air tightness detection device, comprising the following steps:

[0018] S1: Clamping the pipe to be tested, passing the pipe between the first frame and the second frame, and driving the supporting columns connecting the two sides of the frame to move closer to each other until the two sides of the frame abut against each other. At this time, the pipe to be tested is clamped by the clamping openings on both sides of the frame;

[0019] S2: forming a detection area, inputting gas into the sealing airbag in the installation groove through the sealing air source input pipeline, the sealing airbags on both sides of the detection chamber expand together with the installation groove, the inner wall of the detection chamber and the pipe to be tested to form a sealed detection area;

[0020] S3: Gas transmission detection, the detection gas source input pipeline inputs the detection gas into the detection area, the detection gas first enters the first through groove and penetrates the circumference of the first through groove to enter the sealing area for rapid filling, and then the value of the air pressure detection instrument connected to the detection area is observed to determine whether the gas pipeline is airtight;

[0021] S4: The pipe fittings are disassembled, the sealed air source input pipeline stops air intake, and the pressure relief device relieves the pressure. After the pressure is relieved to the set threshold, the driving component drives the supporting columns on both sides to move away from each other, releases the clamping of the pipe fitting to be tested, and removes the pipe fitting to be tested.

[0022] The beneficial effects of the present invention are:

[0023] 1. The pipe to be tested passes through the detection chamber formed by the first frame and the second frame. The pipe to be tested is clamped and supported by the clamping openings at the front and rear ends. Then, the detection gas is input into the detection area in the sealed chamber, which is sealed by the sealing component, the inner wall of the detection chamber and the pipe to be tested, through the detection gas source input pipeline, so as to effectively improve the detection efficiency;

[0024] 2. The ventilation ring plate is provided to further form a sealing area in the detection area. The detection gas input from the detection gas source input pipeline first enters the first through groove. The first through groove and the detection area are connected through an air inlet channel that runs through the circumference along the length direction of the first through groove. The detection gas entering the first through groove can enter the sealing area through each air inlet channel, thereby ensuring the sealing efficiency of the detection gas that quickly fills the sealing area and avoiding the influence of a single air inlet point on the detection result;

[0025] 3. Pass the pipe to be tested through the detection component, and use the driving component to drive the supporting columns symmetrically arranged on the operating table to move closer to each other. The detection component is arranged on the opposite sides of the supporting columns on both sides, and follows the supporting columns to move closer until the pipe to be tested is fixed and clamped. The assembly of the gas pipeline and the detection device is more convenient and the operation is simple, which can significantly improve the detection efficiency. The operator can quickly complete the detection task and reduce the time consumption during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the structure of the invention;

[0027] Figure 2 It is a schematic diagram of the structure of the driving components;

[0028] Figure 3It is a cross-sectional view of the test component when the pipe to be tested is clamped;

[0029] Figure 4 It is a cross-sectional view of the detection component when the pipe to be tested is clamped in another embodiment.

[0030] The symbols in the figure are:

[0031] 1. Operating table; 2. Support column; 3. Detection component; 4. Pipe to be tested; 5. First slider; 6. First slide groove; 7. Driving strip plate; 8. Rack structure; 9. First gear; 10. First worm gear; 11. Driving rod; 12. Tooth structure; 13. First motor; 14. First frame; 15. Second frame; 16. Detection chamber; 17. Clamping port; 18. Detection area; 19. Detection air source input pipeline; 20. Air pressure detection instrument; 21. Detection pipeline; 22. Support block; 23. Mounting groove; 24. Sealing airbag; 25. Sealing air source input pipeline; 26. Second slide groove; 27. Second slider; 28. Magnetic block; 29. ​​Control panel; 30. Rubber layer; 31. Sealing area; 32. Ventilation ring plate; 33. First through groove; 34. Air inlet channel. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0033] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0035] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0036] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0037] First embodiment:

[0038] like Figure 1-3As shown, this embodiment provides a gas pipeline air tightness detection device, including an operating table 1, on which supporting columns 2 that can move toward each other are symmetrically arranged, and the supporting columns 2 are connected to a detection component 3, and the detection component 3 includes a first frame 14 and a second frame 15, and the first frame 14 and the second frame 15 are respectively symmetrically arranged on the opposite sides of the supporting columns 2. Driven by the driving component, the first frame 14 and the second frame 15 are pressed against the inside to form a detection chamber 16, and a clamping port 17 for clamping a pipe 4 to be tested is arranged in the axial direction of the detection chamber 16, and a sealing component is arranged in the detection chamber 16, and the sealing component, the inner wall of the detection chamber 16 and the pipe 4 to be tested constitute a sealed detection area 18, and the detection area 18 is connected to a detection gas source input pipeline 19 and an air pressure detection instrument 20.

[0039] The pipe 4 to be tested is passed through the detection component 3, and the supporting columns 2 symmetrically arranged on the operating table 1 are driven by the driving component to move closer to each other. The detection component 3 is arranged on the opposite sides of the supporting columns 2 on both sides, and follows the supporting columns 2 to approach until the pipe 4 to be tested is fixedly clamped. The assembly of the gas pipeline and the detection device is more convenient and simple to operate, which can significantly improve the detection efficiency. The operator can quickly complete the detection task and reduce the time consumption during the detection process; the pipe 4 to be tested passes through the detection chamber 16 formed by the first frame 14 and the second frame 15, and the pipe 4 to be tested is clamped and supported by the clamping openings 17 at the front and rear ends. Then, gas is input into the detection area 18 sealed by the sealing component, the inner wall of the detection chamber 16 and the pipe 4 to be tested in the sealed chamber through the detection gas source input pipeline 19 to increase the internal air pressure, and the air tightness of the pipe body to be tested in the detection area 18 is judged according to the air pressure value displayed on the air pressure detection instrument 20 connected to the detection area 18.

[0040] like Figure 3 As shown, the sealing component includes a semi-annular support block 22 arranged on the inner wall of the first frame 14 and the second frame 15 of the above-mentioned detection chamber 16, and the support block 22 is provided with a mounting groove 23 along the circumference of the pipe 4 to be tested on the side away from the inner wall of the detection chamber 16. The sealing airbag 24 surrounds the pipe 4 to be tested and is fixed in the mounting groove 23 formed by two sections of splicing to form a ring, and the sealing airbag 24 is connected to a sealing air source input pipe 25.

[0041] The sealed airbag 24 in the installation groove 23 is supplied with gas through the sealed air source input pipeline 25, and the sealed airbags 24 on both sides of the detection chamber 16 expand together with the installation groove 23, the inner wall of the detection chamber 16 and the pipe 4 to be tested to form a sealed detection area 18. The sealed airbag 24 is used to quickly create a sealed detection area 18, which effectively improves the detection efficiency and has a good sealing effect.

[0042] As a mature existing air pressure detection instrument, the pressure detection instrument model specification selection and fixing method can be selected and set accordingly in the specific actual situation, and will not be repeated in this application. The detection gas can be an inert gas such as helium and nitrogen.

[0043] It also includes a pressure relief device (not shown), which is connected to the detection chamber 16. After the measurement is completed, before the frame is opened, the pressure is first released internally through the pressure relief device. The pressure relief device can be further interlocked with the frame, that is, the pressure relief does not reach the set threshold, and the frame cannot be opened, so as to avoid the danger of direct opening of the frame due to the instantaneous release of pressure, such as gas spraying may cause personal injury or other unexpected situations, and when there is too high pressure in the detection chamber 16 during the detection process, the pressure relief device can release the pressure in time to avoid damage to the device itself due to excessive pressure, thereby extending the service life of the device and also ensuring the personal safety of the operator. The pressure relief device itself and the interlocking setting with the detection component 3 are both mature existing technologies, and can be purchased and adaptively set in this detection device, so it will not be elaborated on.

[0044] A control panel 29 is provided on one side of the operating table 1 , and the control panel 29 is electrically connected to the detection component 3 and the sealing component.

[0045] A rubber layer 30 is provided at the clamping opening 17 to provide a good clamping effect while avoiding scratches and impressions on the surface of the tube to be tested.

[0046] Second embodiment:

[0047] This embodiment provides a gas pipeline air tightness detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] like Figure 1 and Figure 2 As shown, a first slider 5 is provided at the bottom of the supporting column 2, and a first slide groove 6 is provided on the operating table 1 corresponding to the slider. The first slider 5 passes through the first slide groove 6 and is connected with a driving component in the operating table 1. The driving component includes a driving strip plate 7 fixedly connected to the first slider 5. The driving strip plate 7 is slidably arranged in the operating table 1 along the length direction of the first slide groove 6. A rack structure 8 is provided on one side of the driving strip plate 7. The rack structure 8 is meshed with a first gear 9. The first gear 9 is rotatably arranged in the operating table 1. A first worm gear 10 is coaxially connected to the lower side of the first gear 9. The first worm gear 10 is meshed with a tooth structure 12 on a driving rod 11. The driving rod 11 is rotatably connected to the operating table 1, and a first motor 13 is coaxially fixedly connected to one side of the driving rod 11.

[0049] Through the transmission connection of the driving rod 11, the first worm gear 10, the first gear 9 and the driving strip 7, when the first motor 13 drives the driving rod 11 to rotate, the supporting columns 2 on both sides can move closer to or away from each other, which is convenient for quickly clamping or releasing the pipe 4 to be tested.

[0050] A second slide groove 26 penetrating the top is provided on the connection side between the support column 2 and the frame, and a second sliding block 27 capable of sliding in the second slide groove 26 is fixedly connected to the frame corresponding to the support column 2 .

[0051] The second slide groove 26 is abutted against a magnetic block 28 embedded in the support column 2 . The second slider 27 is made of a magnetically conductive material. After the frame is installed, the second slider 27 abuts against the magnetic block 28 in the second slide groove 26 .

[0052] The second slider 27 can be made of silicon steel sheet, and the magnetic block 28 is an electromagnet. The silicon steel sheet is an iron alloy with a high silicon content and has excellent soft magnetic properties, such as low coercive force and high magnetic permeability. These properties enable the second slider 27 to form a more stable magnetic connection after the magnetic block 28 is energized, which is convenient for replacing the corresponding first frame 14 and second frame 15 when detecting pipes of different specifications.

[0053] Third embodiment:

[0054] This embodiment provides a gas pipeline air tightness detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] like Figure 4 As shown, a ventilation ring plate 32 is disposed between the two support blocks 22, and the ventilation ring plate 32 is connected to the air source input pipeline and the air pressure detection instrument 20. An air inlet channel 34 is provided on the side of the ventilation ring plate 32 away from the frame. The ventilation ring plate 32 and the sealing component and the outer wall of the pipe 4 to be tested constitute a sealing area 31, and the ventilation ring plate 32 is fixedly disposed against the inner wall of the detection chamber 16.

[0056] By setting the ventilation ring plate 32, a sealing area 31 is further formed in the detection area 18, and the detection gas input into the detection area 18 through the detection gas source input pipeline 19 can quickly fill the sealing area 31 through the ventilation ring plate 32, thereby further improving the detection efficiency.

[0057] A first through groove 33 is provided along the circumference of the ventilation ring plate 32 between the ventilation ring plate 32 and the detection chamber 16, and a through air inlet channel 34 is provided on the side of the first through groove 33 away from the frame. The air inlet channel 34 is provided through the circumference along the length direction of the first through groove 33. The detection gas input from the detection gas source input pipeline 19 first enters the first through groove 33, and the first through groove 33 and the detection area 18 are connected through the air inlet channel 34 provided through the circumference along the length direction of the first through groove 33. The detection gas entering the first through groove 33 can enter the sealing area 31 through each air inlet channel 34, thereby ensuring the sealing efficiency of the detection gas that quickly fills the sealing area 31 and avoiding the influence of a single air inlet point on the detection result.

[0058] Also included is a detection method for the gas pipeline air tightness detection device, comprising the following steps:

[0059] S1: The pipe 4 to be tested is clamped, and the pipe is passed between the first frame 14 and the second frame 15. The driving component drives the supporting columns 2 connecting the two sides of the frame to approach each other until the two sides of the frame abut against each other. At this time, the pipe 4 to be tested is clamped by the clamping openings 17 on both sides of the frame;

[0060] S2: forming a detection area 18, inputting gas into the sealing airbag 24 in the installation groove 23 through the sealing air source input pipe 25, the sealing airbags 24 on both sides of the detection chamber 16 expand together with the installation groove 23 and the inner wall of the detection chamber 16 and the pipe 4 to be tested to form a sealed detection area 18;

[0061] S3: Gas transmission detection, the detection gas source input pipeline 19 inputs the detection gas into the detection area 18, the detection gas first enters the first through groove 33 and penetrates the air inlet channel 34 arranged along the length direction of the first through groove 33 to enter the sealing area 31 for rapid filling, and then by observing the value of the air pressure detection instrument 20 connected to the detection area 18, it is judged whether the gas pipeline is airtight;

[0062] S4: The pipe fitting is disassembled, the air supply input pipe 25 is sealed to stop air intake, and the pressure relief device relieves pressure. After the pressure is relieved to a set threshold, the driving component drives the supporting columns 2 on both sides to move away from each other, releases the clamping of the pipe fitting 4 to be tested, and removes the pipe fitting 4 to be tested.

[0063] By moving the tube to be tested, testing the surface of different sections of the tube after the tube to be tested is supported, and repeating the operation, the air tightness performance of the entire tube to be tested can be tested.

[0064] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A gas pipeline air tightness detection device, characterized in that: The invention comprises an operating table (1), on which supporting columns (2) capable of moving toward each other are symmetrically arranged, the supporting columns (2) are connected to a detection component (3), the detection component (3) comprises a first frame (14) and a second frame (15), the first frame (14) and the second frame (15) are symmetrically arranged on opposite sides of the supporting column (2), driven by a driving component, the first frame (14) and the second frame (15) are pressed against each other to form a detection chamber (16) inside, a clamping opening (17) for clamping a pipe to be tested (4) is arranged through the detection chamber (16) in the axial direction, a sealing component is arranged in the detection chamber (16), the sealing component, the inner wall of the detection chamber (16) and the pipe to be tested (4) form a sealed detection area (18), and the detection area (18) is connected to a detection gas source input pipeline (19) and an air pressure detection instrument (20).

2. The gas pipeline air tightness detection device according to claim 1, characterized in that: The sealing component comprises a semi-circular support block (22) arranged on the inner wall of the first frame body (14) and the second frame body (15) of the above-mentioned detection chamber (16); a mounting groove (23) is provided on the side of the support block (22) away from the inner wall of the detection chamber (16) along the circumference of the pipe to be tested (4); a sealing airbag (24) surrounds the pipe to be tested (4) and is fixed in the mounting groove (23) formed by splicing two sections into a ring; and the sealing airbag (24) is connected to a sealing air source input pipeline (25).

3. The gas pipeline air tightness detection device according to claim 2, characterized in that: A ventilation ring plate (32) is disposed in contact with the two support blocks (22); the ventilation ring plate (32) is connected to the air source input pipeline and the air pressure detection instrument (20); and the ventilation ring plate (32) is fixedly disposed in contact with the inner wall of the detection chamber (16).

4. The gas pipeline air tightness detection device according to claim 3, characterized in that: A first through groove (33) is provided along the circumference of the ventilation ring plate (32) on the abutting side of the ventilation ring plate (32) and the detection chamber (16), and a through air inlet passage (34) is provided on the side of the first through groove (33) away from the frame.

5. The gas pipeline air tightness detection device according to claim 4, characterized in that: The air inlet passage (34) circumferentially penetrates the first through groove (33) along the length direction of the first through groove (33).

6. The gas pipeline air tightness detection device according to claim 1, characterized in that: A first slider (5) is provided at the bottom of the support column (2), and a first slide groove (6) is provided on the operating table (1) corresponding to the slider. The first slider (5) passes through the first slide groove (6) and is connected to a driving component in the operating table (1). The driving component comprises a driving strip plate (7) fixedly connected to the first slider (5). The driving strip plate (7) is slidably arranged in the operating table (1) along the length direction of the first slide groove (6). A rack structure (8) is provided on one side of the driving strip plate (7). The rack structure (8) is meshed with a first gear (9). The first gear (9) is rotatably arranged in the operating table (1). A first worm gear (10) is coaxially connected to the lower side of the first gear (9). The first worm gear (10) is meshed with a tooth structure (12) on a driving rod (11). The driving rod (11) is rotatably connected to the operating table (1). A first motor (13) is coaxially fixedly connected to one side of the driving rod (11).

7. The gas pipeline air tightness detection device according to claim 6, characterized in that: A second slide groove (26) penetrating the top is arranged on the connection side between the support column (2) and the frame, and a second sliding block (27) capable of sliding in the second slide groove (26) is fixedly connected to the frame corresponding to the support column (2).

8. The gas pipeline air tightness detection device according to claim 7, characterized in that: The second slide groove (26) is in contact with a magnetic block (28) embedded in the support column (2); the second slider (27) is made of a magnetically conductive material; and the second slider (27) is in contact with the magnetic block (28) in the second slide groove (26) after the frame is installed.

9. A detection method based on the gas pipeline air tightness detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The pipe (4) to be tested is clamped and passed between the first frame (14) and the second frame (15). The driving component drives the support columns (2) connecting the two side frames to approach each other until the two sides of the frames are in contact. At this time, the pipe (4) to be tested is clamped by the clamping openings (17) on both sides of the frames. S2: forming a detection area (18), inputting gas into the sealing airbag (24) in the installation groove (23) through the sealing air source input pipeline (25), so that the sealing airbags (24) on both sides of the detection chamber (16) expand together with the installation groove (23), the inner wall of the detection chamber (16) and the pipe (4) to be detected to form a sealed detection area (18); S3: gas transmission detection, the detection gas is input into the detection area (18) through the detection gas source input pipeline (19), the detection gas first enters the first through groove (33), passes through the air inlet channel (34) arranged along the length direction of the first through groove (33), and enters the sealing area (31) for rapid filling, and then by observing the value of the air pressure detection instrument (20) connected to the detection area (18), it is judged whether the gas pipeline is gas tight; S4: the pipe fitting is disassembled, the air supply input pipeline (25) is sealed to stop air intake, and the pressure relief device relieves pressure. After the pressure is relieved to a set threshold, the driving component drives the supporting columns (2) on both sides to move away from each other, releases the clamping of the pipe fitting to be tested (4), and removes the pipe fitting to be tested (4).

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