Pressure pipeline detection device

Abstract

The invention discloses a pressure pipeline detection device, and relates to the technical field of pipeline detection. The device comprises a base, a telescopic part is installed at the top of the base, a water outlet pipe and a water inlet pipe are arranged on the telescopic part, the telescopic part is hollow, and one end of the telescopic part is open; the plugging piece is installed at the opening end of the telescopic piece and used for being connected with one end of an internal pipeline to be detected, and an opening in one end of the pipeline to be detected is plugged through the plugging piece; the supporting piece is detachably arranged in the telescopic piece and used for supporting a to-be-detected pipeline, and the to-be-detected pipeline and the telescopic piece are kept coaxial through the supporting piece. According to the invention, the design of the telescopic member can effectively carry out airtightness detection on pipelines with different lengths, the applicability is improved, under the cooperation of the supporting member and the plugging member, it is ensured that the to-be-detected pipeline is communicated with the air inlet pipe after installation is completed, and when pipelines with different diameters are detected, the air inlet pipe can smoothly introduce air into the to-be-detected pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection devices, and in particular to a pressure pipeline detection device. Background Art

[0002] Pressure pipeline refers to all pipelines that are subjected to internal or external pressure. Pressure pipeline is a type of pipeline used to transport the medium inside it.

[0003] When the pressure pipe is produced, in order to detect whether the outer surface of the pressure pipe is damaged, it is necessary to perform air pressure testing on the pressure pipe. When testing the pressure pipe in the prior art, the two ends of the pressure pipe are generally sealed first, and an air inlet pipe is provided at one of the sealed ends. The sealed pressure pipe is then placed in a water tank, and gas is input into the air inlet pipe to observe whether bubbling occurs in the water. If bubbling occurs, it indicates that the outer surface of the pressure pipe is damaged. However, this detection method cannot be used to test longer pipes because the pipes cannot be placed in the water tank, so the water tank needs to be replaced, which is inconvenient to use. Therefore, it is less applicable when performing air tightness testing on pipes and is difficult to meet the needs of testers.

[0004] In view of the above situation, the present invention proposes a pressure pipeline detection device. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the above-mentioned background technology, and provide a pressure pipeline detection device.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A pressure pipeline detection device, comprising: A base, a telescopic member is installed on the top of the base, a water outlet pipe and a water inlet pipe are arranged on the telescopic member, and the interior of the telescopic member is hollow and one end is open; A plugging member, installed at the open end of the telescopic member, used to connect with one end of the internal pipe to be tested, and to plug the opening of one end of the pipe to be tested through the plugging member; A support member, detachably disposed in the telescopic member, used to support the pipeline to be tested, so that the pipeline to be tested and the telescopic member are kept coaxial through the support member; The gas injection disk is installed at one end of the telescopic part away from its opening, and the other end of the pipeline to be tested abuts against the gas injection disk. The gas injection disk is connected with an air inlet pipe. When the pipeline to be tested abuts against the gas injection disk, the air inlet pipe remains connected to the inside of the pipeline to be tested.

[0007] Furthermore, the telescopic part includes a sealing sleeve horizontally constructed on the base, a sliding sleeve is horizontally slidably installed on the base, a sliding ring groove is opened at one end of the sliding sleeve, the sliding ring groove is located at the thickness of the sliding sleeve wall, the sealing sleeve is slidably inserted in the sliding ring groove, and an adjusting part for driving the sliding sleeve to move is installed on the base.

[0008] Furthermore, the adjusting member includes an adjusting screw horizontally and rotatably mounted on the base, and the sliding sleeve is provided with a connecting member threadably matched with the adjusting screw. When the adjusting screw rotates, the connecting member drives the sliding sleeve to move.

[0009] Furthermore, the connecting member includes a sliding frame horizontally slidably installed on the base, the sliding frame is arranged on the sliding sleeve, and an adjustment long plate threadedly sleeved on the adjusting screw is horizontally slidably installed on the base, and the head and tail ends of the adjustment long plate are respectively spaced from the head and tail ends of the adjusting screw, and the adjustment long plate is detachably connected to the sliding frame.

[0010] Furthermore, a plug-in board is vertically slidably installed on the sliding frame, and the plug-in board has two vertical sections. Plug-in tooth grooves are provided on opposite sides of the two vertical sections of the plug-in board, and strip slots for inserting the plug-in tooth grooves are provided on both sides of the adjusting long plate in the opposite length direction. A limit plate is horizontally slidably installed on the sliding frame, and a limit groove for inserting the limit plate is provided on one side of the plug-in board.

[0011] Furthermore, an annular convex plate is constructed along the edge of one end of the sliding sleeve away from the gas injection disk, an annular bevel groove is constructed along the inner edge of the annular convex plate, two plate bodies are constructed on the sliding sleeve, a movable plate is slidably installed between the two plate bodies, a sliding ring plate is constructed on the movable plate, a conical ring is constructed at one end of the sliding ring plate, the conical ring is used to abut against the annular bevel groove, the sliding ring plate is sleeved on the sealing sleeve, and a connecting spring is installed between the sliding ring plate and the sliding sleeve.

[0012] Furthermore, a fixed frame is constructed on the sliding sleeve, and the sliding frame is elastically connected to the fixed frame through a high-pressure spring. A transmission member acting on the sliding frame and the movable plate is provided on the sliding sleeve. When the sliding frame moves on the fixed frame, the transmission member is used to make the conical ring press against the annular bevel groove.

[0013] Furthermore, the transmission member includes a sliding arc plate slidably mounted on the sliding sleeve, a first rack is mounted on the sliding arc plate, a second rack is mounted on the movable plate, and a driving gear meshing with the first rack and the second rack is rotatably mounted on the two plate bodies, the first rack and the second rack are distributed up and down, and a hook plate for contacting one side of the sliding arc plate is constructed on the sliding frame, and when the high-pressure spring is in normal state, a gap is left between the hook plate and one side of the sliding arc plate.

[0014] Furthermore, the sealing member includes a sealing flange installed at the open end of the sealing sleeve by bolts, a sliding rod is slidably penetrated through the center of the sealing flange, one end of the sliding rod is constructed with a docking flange, which is used to connect with one end of the pipeline to be tested, a threaded groove is opened on the outer peripheral side of the sliding rod, a threaded barrel is threadedly sleeved on the sliding rod, a sealing gasket is sleeved on the sliding rod, and one end of the threaded barrel is pressed on the sealing gasket.

[0015] Furthermore, the support member includes a support ring plate movably inserted in the sliding sleeve, a driving screw is threaded into the support ring plate, an adjusting ring plate is slidably inserted on the inner circumference of the support ring plate, the adjusting ring plate is threaded on the driving screw, a plurality of support plates are rotatably installed in a circular array on the inner circumference of the support ring plate, a hinged rod is hinged between one side of the support plate and the adjusting ring plate, and the free end of the support plate is used to contact the outer wall of the pipe to be tested.

[0016] The beneficial effects of the present invention are as follows: The design of the telescopic member of the present invention can effectively perform airtightness detection on pipelines of different lengths, thereby improving applicability. With the cooperation of the support member and the blocking member, it is ensured that the pipeline to be tested is connected to the air inlet pipe after installation is completed. When testing pipelines of different diameters, the air inlet pipe can smoothly intake air into the pipeline to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 The present invention Figure 1 Partial stereoscopic cutaway view; Figure 3 The present invention Figure 1 Another partial three-dimensional cutaway view; Figure 4 It is a partial structural schematic diagram of the present invention; Figure 5 It is another structural schematic diagram of the present invention; Figure 6 It is another structural schematic diagram of the present invention; Figure 7 The present invention Figure 2 A magnified view of the structure at center; Figure 8 The present invention Figure 3 A magnified view of the structure at B in the middle; Fig. 9 The present invention Figure 3 A magnified view of the structure at C in the middle; Fig.10 The present invention Figure 3 A magnified view of the structure at D in the middle; Figure numerals: 1, base; 2, telescopic member; 201, sealing sleeve; 202, sliding sleeve; 203, sliding ring groove; 3, water outlet pipe; 4, water inlet pipe; 5, blocking member; 501, sealing flange; 502, sliding rod; 503, threaded groove; 504, threaded cylinder; 505, sealing gasket; 506, docking flange; 6, supporting member; 601, supporting ring plate; 602, driving screw; 603, adjusting ring plate; 604, supporting plate; 605, hinged rod; 7, air injection disk; 8, air inlet pipe; 9, adjusting member; 901, adjusting screw Rod; 10, connecting piece; 1001, sliding frame; 1002, adjusting long board; 11, plug-in board; 12, plug-in tooth groove; 13, strip slot; 14, limit plate; 15, limit groove; 16, annular convex plate; 17, annular inclined groove; 18, plate body; 19, moving plate; 20, sliding ring plate; 21, conical ring; 22, connecting spring; 23, high-pressure spring; 24, transmission part; 2401, sliding arc plate; 2402, first rack; 2403, second rack; 2404, hook plate; 2405, driving gear; 25, fixed frame. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1-Figure 10 As shown, a pressure pipeline detection device proposed in one embodiment of the present invention includes: Base 1, a telescopic member 2 is installed on the top of the base 1, specifically, the telescopic member 2 includes a sliding part and a fixed part, the fixed part is installed on the base 1, a water outlet pipe 3 and a water inlet pipe 4 are arranged on the telescopic member 2, the interior of the telescopic member 2 is hollow and one end of the fixed part is open, the telescopic member 2 is used to place the pipeline to be tested, and the telescopic member 2 is made of transparent material, so that the test personnel can clearly see the pipeline to be tested located in the telescopic member 2; The plugging member 5 is installed at the open end of the telescopic member 2 and is used to connect with one end of the internal pipe to be tested. The plugging member 5 is used to block the opening of one end of the pipe to be tested. That is, when the pipe to be tested is placed in the telescopic member 2, the plugging member 5 can be installed at the opening of one end of the pipe to be tested to ensure the sealing performance. Then, the plugging member 5 is installed at the fixed part of the telescopic member 2 to seal one end of the fixed part. The support member 6 is detachably arranged in the telescopic member 2, and is used to support the pipeline to be tested. The pipeline to be tested is kept coaxial with the telescopic member 2 through the support member 6. In order to ensure that the pipeline to be tested is coaxial with the telescopic member 2, it is only necessary to place the pipeline to be tested on the support member 6, and then seal one end of the pipeline to be tested through the blocking member 5 and connect it to the open end of the fixed part of the telescopic member 2; The gas injection disk 7 is installed on the end of the telescopic member 2 away from its opening, that is, the gas injection disk 7 is installed on one end of the sliding part of the telescopic member 2, and the other end of the pipeline to be tested abuts on the gas injection disk 7. The gas injection disk 7 is connected with an air inlet pipe 8. When the pipeline to be tested abuts on the gas injection disk 7, the air inlet pipe 8 is connected to the inside of the pipeline to be tested. When the installation of the blocking member 5 is completed and the pipeline to be tested is placed on the support member 6, the sliding part of the telescopic member 2 is moved at this time, so that the gas injection disk 7 abuts on the other end of the pipeline to be tested. At this time, the sealing of the two ends of the pipeline to be tested is completed. Not only that, at this time, the air inlet pipe 8 and the inner part of the pipeline to be tested are kept connected. The parts remain connected, and then only an external water pipe is needed to inject water into the water inlet pipe 4 until the water inside the telescopic member 2 overflows from the water outlet pipe 3. At this time, the water inlet pipe 4 and the water outlet pipe 3 can be blocked. Preferably, water valves can be installed on the water inlet pipe 4 and the water outlet pipe 3 to control the opening and closing of the water inlet pipe 4 and the water outlet pipe 3, and then gas is injected into the air inlet pipe 8 through a pressure pump. When continuous bubbles are found in the water in the telescopic member 2, it indicates that the pipeline to be tested is damaged. Compared with the prior art, the design of the telescopic member 2 can effectively perform airtightness detection on pipelines of different lengths, thereby improving applicability.

[0020] like Figure 1As shown, the specific structure of the telescopic member 2 is specifically disclosed. The telescopic member 2 includes a sealing sleeve 201 horizontally constructed on the base 1, that is, the fixed part is the sealing sleeve 201, the water inlet pipe 4 and the water outlet pipe 3 are installed on the sealing sleeve 201, and a sliding sleeve 202 is horizontally slidably installed on the base 1, that is, the sliding part is the sealing sleeve 201, and the gas injection disk 7 is installed on the sealing sleeve 201. Preferably, the sealing sleeve 201 and the sliding sleeve 202 are both made of transparent materials, and can be specifically made of Pam board material, which has good strength and transparency effect, and improves service life. One end of the sliding sleeve 202 is provided with The sliding ring groove 203 is located at the wall thickness of the sliding sleeve 202. The wall thickness refers to the tube wall of the sliding sleeve 202. The tube wall has a certain thickness. The sealing sleeve 201 is slidably inserted in the sliding ring groove 203. An adjusting member 9 for driving the sliding sleeve 202 to move is installed on the base 1. That is to say, the sliding sleeve 202 can be driven to move by the adjusting member 9, thereby ensuring that it is suitable for pipelines to be tested of different lengths. The sliding sleeve 202 is located in the sliding ring groove 203, so that most of the sealing sleeve 201 is located in the sliding ring groove 203 when not in use, thereby reducing the occupied space when not in use.

[0021] like Figure 1 and Figure 3 As shown, a partial structure of the adjusting member 9 is disclosed. The adjusting member 9 includes an adjusting screw 901 horizontally and rotatably mounted on the base 1. A connecting member 10 threadedly matched with the adjusting screw 901 is constructed on the sliding sleeve 202. When the adjusting screw 901 rotates, the connecting member 10 drives the sliding sleeve 202 to move. When the adjusting screw 901 is rotated, the adjusting screw 901 moves to cooperate with the connecting member 10 to move the sliding sleeve 202, thereby controlling the movement of the sliding sleeve 202 and having self-locking properties, thereby ensuring the sealing between the gas injection disk 7 on the sliding sleeve 202 and the pipeline to be tested. Preferably, a sealing ring can be provided on the contact surface between the gas injection disk 7 and the pipeline to be tested to further improve the sealing effect.

[0022] like Figure 1 and Figure 8As shown, the specific structure of the connecting member 10 is disclosed. When the sliding sleeve 202 needs to be moved significantly, the adjusting screw 901 needs to be rotated for a long time. In order to make it more convenient for the inspectors to use it, the connecting member 10 includes a sliding frame 1001 horizontally slidably installed on the base 1, and the sliding frame 1001 is arranged on the sliding sleeve 202. An adjusting long plate 1002 threadedly sleeved on the adjusting screw 901 is horizontally slidably installed on the base 1. The two ends of the adjusting long plate 1002 are respectively spaced from the two ends of the adjusting screw 901. The adjusting long plate 1002 is detachably connected to the sliding frame 1001. When the sliding sleeve 202 needs to be moved significantly, the adjusting long plate 1002 can be disassembled from the sliding frame 1001, and then the inspectors manually move the sliding sleeve 202. After the sliding sleeve 202 is moved, the adjusting long plate 1002 can be connected to the sliding frame 1001, and the adjusting screw 901 can be tightened at this time.

[0023] like Figure 1 , Figure 4 and Figure 8 As shown, a specific connection method between the sliding frame 1001 and the adjusting long plate 1002 is disclosed. A plug-in board 11 is vertically slidably installed on the sliding frame 1001. The plug-in board 11 has two vertical sections. The two vertical sections of the plug-in board 11 are provided with plug-in tooth grooves 12 on opposite sides. The two sides of the adjusting long plate 1002 opposite to each other in the length direction are provided with strip-shaped slots 13 for inserting the plug-in tooth grooves 12. A limit plate 14 is horizontally slidably installed on the sliding frame 1001. A limit groove 15 for inserting the limit plate 14 is provided on one side of the plug-in board 11. When the sliding sleeve 202 is moved, At this time, the limit plate 14 can be moved horizontally so that the limit plate 14 is disengaged from the corresponding limit groove 15, and then the plug-in plate 11 is moved downward so that the plug-in tooth groove 12 on the plug-in plate 11 is inserted into the strip slot 13, thereby completing the connection between the sliding frame 1001 and the adjustment long plate 1002. The design of the strip slot 13 and the plug-in tooth groove 12, when the sliding sleeve 202 is moved, when the plug-in tooth groove 12 and the strip slot 13 are misaligned, only a small rotation of the adjusting screw 901 is required to ensure that the plug-in tooth groove 12 is inserted into the strip slot 13, which is convenient to use.

[0024] like Figure 1 , Figure 5 and Figure 7As shown, in order to improve the sealing between the sliding sleeve 202 and the sealing sleeve 201, an annular convex plate 16 is constructed along the edge of the end of the sliding sleeve 202 away from the gas injection disk 7, and an annular bevel groove 17 is constructed along the inner edge of the annular convex plate 16. Two plate bodies 18 are constructed on the sliding sleeve 202, and a movable plate 19 is slidably installed between the two plate bodies 18. A sliding ring plate 20 is constructed on the movable plate 19. A conical ring 21 is constructed at one end of the sliding ring plate 20, and the conical ring 21 is used to abut against the annular bevel groove 17. The sliding ring plate 20 is sleeved on the sealing sleeve 201, and a connecting spring 22 is installed between the sliding ring plate 20 and the sliding sleeve 202. In this embodiment, the conical ring 21 is abutted against the annular bevel groove 17 by the abutting force of the connecting spring 22, thereby improving the sealing effect between the sliding sleeve 202 and the sealing sleeve 201 and preventing water seepage from the fitting surface between the sliding sleeve 202 and the sealing sleeve 201.

[0025] like Figure 1 and Figure 3 As shown, in order to further improve the sealing effect of the tapered ring 21, a fixed frame 25 is constructed on the sliding sleeve 202, and the sliding frame 1001 is elastically connected to the fixed frame 25 through a high-pressure spring 23, wherein the high-pressure spring 23 refers to a spring that can stably work under extremely high loads or extreme pressure environments, usually has ultra-high stiffness, fatigue resistance and corrosion resistance, and is made of high-strength alloy steel (such as 60Si2MnA, 50CrVA), stainless steel (17-7PH) or special alloy (such as Inconel 718), after quenching + tempering heat treatment to improve tensile strength, the sliding sleeve 202 is provided with a transmission member 24 acting on the sliding frame 1001 and the moving plate 19. When the sliding frame 1001 moves on the fixed frame 25, the transmission member 24 is used to make the conical ring 21 press against the annular inclined groove 17. After the sliding sleeve 202 moves well, and the plug-in tooth groove 12 is inserted into the strip-shaped slot 13, at this time, turning the adjusting screw 901 will make the sliding frame 1001 move, and the movement of the sliding frame 1001 through the high-pressure spring 23 will make the fixed frame 25 move, so that the sliding sleeve 202 moves and makes the gas injection disk 7 abut against one end of the pipe to be tested. When the adjusting screw 901 continues to be turned, the high-pressure spring 23 will be deformed. When the high-pressure spring 23 is deformed, it means that the gas injection disk 7 is now abutting against the pipe to be tested and can achieve a sealing effect. At this time, turning the adjusting screw 901 will make the sliding frame 1001 move, which is equivalent to the sliding frame 1001 moving in the fixed frame 25. At this time, the transmission member 24 will make the conical ring 21 further press against the annular bevel groove 17 to improve the sealing effect between the sliding sleeve 202 and the sealing sleeve 201.

[0026] like Figure 1As shown, the specific structure of the transmission member 24 is disclosed. The transmission member 24 includes a sliding arc plate 2401 slidably mounted on the sliding sleeve 202, a first rack 2402 is mounted on the sliding arc plate 2401, a second rack 2403 is mounted on the moving plate 19, and a driving gear 2405 meshing with the first rack 2402 and the second rack 2403 is rotatably mounted on the two plate bodies 18. The first rack 2402 and the second rack 2403 are distributed up and down. A hook plate 2404 for contacting one side of the sliding arc plate 2401 is constructed on the sliding frame 1001. When the high-pressure spring 23 is in a normal state, the hook plate 2404 and the sliding arc plate There is a gap on one side of 2401. When the sliding frame 1001 moves in the fixed sleeve, the movement of the sliding frame 1001 will drive the hook plate 2404 to move, so that the hook plate 2404 contacts the sliding arc plate 2401 to move the sliding arc plate 2401. The movement of the sliding arc plate 2401 will move the first rack 2402. When the first rack 2402 moves, it will move the second rack 2403 through the driving gear 2405. As the second rack 2403 moves, the movable plate 19 will also move, so that the conical ring 21 moves in the direction of the annular bevel groove 17, so as to further improve the sealing effect.

[0027] like Figure 1 and Fig. 9 As shown, the specific structure of the plugging member 5 is specifically disclosed. The plugging member 5 includes a sealing flange 501 installed at the open end of the sealing sleeve 201 by bolts. A sliding rod 502 is slidably penetrated through the center of the sealing flange 501. One end of the sliding rod 502 is configured with a docking flange 506, which is used to connect with one end of the pipeline to be tested. The sliding rod 502 is located on the outer peripheral side and is provided with a threaded groove 503. A threaded sleeve 504 is threadedly sleeved on the sliding rod 502. A sealing gasket 505 is sleeved on the sliding rod 502. The threaded sleeve 504 is provided with a sealing gasket 505. One end is pressed on the sealing gasket 505. When in use, the docking flange 506 is first installed at one end of the pipe to be tested to complete the sealing of one end, and then the sealing flange 501 is moved to make the sealing flange 501 fit with one end of the sealing sleeve 201, and then installed on the sealing sleeve 201 by bolts, and then the threaded tube 504 is tightened to make the sealing gasket 505 contact between the sliding rod 502 and the sealing flange 501, thereby preventing water inside the telescopic member 2 from seeping out from between the sliding rod 502 and the sealing flange 501.

[0028] like Figure 6As shown, in some embodiments, the support member 6 includes a support ring plate 601 movably inserted in the sliding sleeve 202, a driving screw 602 is threaded into the support ring plate 601, an adjusting ring plate 603 is slidably inserted on the inner circumference of the support ring plate 601, the adjusting ring plate 603 is threaded on the driving screw 602, and a plurality of support plates 604 are rotatably installed in a circular array on the inner circumference of the support ring plate 601, a hinged rod 605 is hinged between one side of the support plate 604 and the adjusting ring plate 603, and the free end of the support plate 604 is used to contact the outer wall of the pipeline to be tested. Before the pipeline to be tested is inserted into the telescopic member 2, the support ring plate 601 is first sleeved on the pipeline to be tested and close to one end, and then the driving screw 602 is rotated to make The adjusting ring plate 603 is required to move, and when the adjusting ring plate 603 moves, it will drive the multiple hinged rods 605 to move. Because one end of the hinged rod 605 is hinged on the support plate 604, when the adjusting ring plate 603 moves, the hinged rod 605 will drive the free ends of the multiple support plates 604 to move toward the direction of the pipeline to be measured, so that the free ends of the multiple support plates 604 are in contact with the pipeline to be measured, and then the end of the pipeline to be measured close to the support ring plate 601 is inserted into the telescopic member 2 until the support ring plate 601 is located in the sliding sleeve 202, thereby ensuring that the pipeline to be measured is coaxial with the support ring plate 601, and the design of the multiple support plates 604 can be suitable for coaxial positioning of pipelines with different diameters, thereby improving applicability.

[0029] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure pipeline detection device, characterized in that: include: A base (1), a telescopic member (2) being mounted on the top of the base (1), a water outlet pipe (3) and a water inlet pipe (4) being provided on the telescopic member (2), the telescopic member (2) being hollow inside and having an opening at one end; A plugging member (5) is mounted on the open end of the telescopic member (2) and is used to connect to one end of the internal pipe to be tested, so as to plug the opening of the pipe to be tested through the plugging member (5); A support member (6) is detachably arranged in the telescopic member (2), and is used to support the pipeline to be tested, so that the pipeline to be tested and the telescopic member (2) are kept coaxial through the support member (6); The gas injection disk (7) is mounted on one end of the telescopic member (2) away from the opening thereof, and the other end of the pipeline to be tested abuts against the gas injection disk (7). The gas injection disk (7) is connected to an air inlet pipe (8). When the pipeline to be tested abuts against the gas injection disk (7), the air inlet pipe (8) remains connected to the interior of the pipeline to be tested.

2. A pressure pipeline detection device according to claim 1, characterized in that: The telescopic member (2) comprises a sealing sleeve (201) horizontally constructed on the base (1); a sliding sleeve (202) is horizontally slidably mounted on the base (1); a sliding ring groove (203) is formed at one end of the sliding sleeve (202); the sliding ring groove (203) is located at a thick portion of the wall of the sliding sleeve (202); the sealing sleeve (201) is slidably inserted into the sliding ring groove (203); and an adjusting member (9) for driving the sliding sleeve (202) to move is mounted on the base (1).

3. A pressure pipeline detection device according to claim 2, characterized in that: The adjusting member (9) comprises an adjusting screw (901) horizontally and rotatably mounted on the base (1); the sliding sleeve (202) is provided with a connecting member (10) threadably matched with the adjusting screw (901); when the adjusting screw (901) rotates, the connecting member (10) drives the sliding sleeve (202) to move.

4. A pressure pipeline detection device according to claim 3, characterized in that: The connecting member (10) comprises a sliding frame (1001) mounted horizontally and slidably on the base (1); the sliding frame (1001) is arranged on the sliding sleeve (202); an adjusting long plate (1002) threadedly sleeved on the adjusting screw (901) is mounted horizontally and slidably on the base (1); the adjusting long plate (1002) has gaps at its head and tail ends respectively with the head and tail ends of the adjusting screw (901); and the adjusting long plate (1002) is detachably connected to the sliding frame (1001).

5. A pressure pipeline detection device according to claim 4, characterized in that: A plug board (11) is vertically slidably mounted on the sliding frame (1001), the plug board (11) having two vertical sections, plugging tooth grooves (12) being provided on opposite sides of the two vertical sections of the plug board (11), strip-shaped slots (13) for inserting the plugging tooth grooves (12) being provided on both sides of the adjusting long plate (1002) in the length direction opposite to each other, a limit plate (14) is horizontally slidably mounted on the sliding frame (1001), and a limit groove (15) for inserting the limit plate (14) is provided on one side of the plug board (11).

6. A pressure pipeline detection device according to claim 2, characterized in that: An annular convex plate (16) is constructed along the edge of one end of the sliding sleeve (202) away from the gas injection disk (7), and an annular inclined groove (17) is constructed along the inner edge of the annular convex plate (16). Two plate bodies (18) are constructed on the sliding sleeve (202), and a movable plate (19) is slidably installed between the two plate bodies (18). A sliding ring plate (20) is constructed on the movable plate (19), and a conical ring (21) is constructed at one end of the sliding ring plate (20), and the conical ring (21) is used to abut against the annular inclined groove (17). The sliding ring plate (20) is sleeved on the sealing sleeve (201), and a connecting spring (22) is installed between the sliding ring plate (20) and the sliding sleeve (202).

7. A pressure pipeline detection device according to claim 6, characterized in that: A fixed frame (25) is constructed on the sliding sleeve (202), and the sliding frame (1001) is elastically connected to the fixed frame (25) via a high-pressure spring (23). A transmission member (24) is provided on the sliding sleeve (202) for acting on the sliding frame (1001) and the movable plate (19). When the sliding frame (1001) moves on the fixed frame (25), the transmission member (24) causes the conical ring (21) to be pressed against the annular inclined groove (17).

8. A pressure pipeline detection device according to claim 7, characterized in that: The transmission member (24) comprises a sliding arc plate (2401) slidably mounted on the sliding sleeve (202), a first rack (2402) being mounted on the sliding arc plate (2401), a second rack (2403) being mounted on the movable plate (19), a driving gear (2405) being rotatably mounted on the two plate bodies (18) and meshing with the first rack (2402) and the second rack (2403), the first rack (2402) and the second rack (2403) being distributed up and down, a hook plate (2404) being configured on the sliding frame (1001) for contacting one side of the sliding arc plate (2401), and a gap being left between the hook plate (2404) and one side of the sliding arc plate (2401) when the high-pressure spring (23) is in a normal state.

9. A pressure pipeline detection device according to claim 2, characterized in that: The plugging member (5) comprises a sealing flange (501) mounted on the open end of the sealing sleeve (201) by means of bolts, a sliding rod (502) slidingly penetrates the center of the sealing flange (501), one end of the sliding rod (502) is configured with a docking flange (506) for connecting with one end of the pipeline to be tested, a threaded groove (503) is provided on the outer peripheral side of the sliding rod (502), a threaded barrel (504) is threadedly sleeved on the sliding rod (502), a sealing gasket (505) is sleeved on the sliding rod (502), and one end of the threaded barrel (504) is pressed against the sealing gasket (505).

10. A pressure pipeline detection device according to claim 2, characterized in that: The support member (6) comprises a support ring plate (601) movably inserted into the sliding sleeve (202), a driving screw (602) being threadedly screwed into the support ring plate (601), an adjusting ring plate (603) being slidably inserted into the inner circumference of the support ring plate (601), the adjusting ring plate (603) being threadedly sleeved on the driving screw (602), a plurality of support plates (604) being rotatably mounted in a circular array on the inner circumference of the support ring plate (601), a hinged rod (605) being hingedly connected between one side of the support plate (604) and the adjusting ring plate (603), and a free end of the support plate (604) being used to contact the outer wall of the pipeline to be tested.

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