Exhaust type pressurizing pipe for pipeline pressurizing

Abstract

The utility model discloses an exhaust type pressurizing pipe for pipeline pressurizing, which belongs to the technical field of pipeline pressurizing, and comprises an exhaust type pressurizing pipe assembly, a pressurizing pipe body, an exhaust type pressurizing pipe and a pressurizing pipe body, the exhaust branch pipe fitting is connected to the peripheral side of the pressing pipe body in a penetrating manner; the exhaust free end of the exhaust square pipe fitting is hermetically connected with an exhaust buffer airbag through a connecting pipeline, and the outer wall of the peripheral side of the exhaust buffer airbag is hermetically connected with an exhaust end pipe; the embedded exhaust buffer assembly is embedded into an inner cavity of the exhaust square pipe fitting; comprising two embedded elastic side rod pieces elastically abutting against the inner walls of the two sides of the exhaust square pipe fitting, fixed mounting blocks fixedly connected to the free ends of the embedded elastic side rod pieces, a rotating rod rotationally mounted between the two fixed mounting blocks, and two buffering and force unloading rotating blade plates symmetrically fixed to the outer wall of the circumferential side of the rotating rod. Vibration of the equipment in the exhaust process is reduced, and the stability of the equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline pressure testing, in particular to an exhaustible pressure pipe for pipeline pressure testing. Background Technique

[0002] In the process of pipeline construction or maintenance, pressure testing is an essential link. By applying a test pressure higher than the normal working pressure to the pipeline, it is possible to detect whether there are leakage points or structural defects in the pipeline. During the pressure testing process, it is necessary to remove air or other gases in the pipeline to ensure the accuracy of the test results. Therefore, a pressure pipe that can effectively control the exhaust process is of great significance for improving the test efficiency and accuracy.

[0003] In the existing pipeline pressure testing, the impact force generated during the exhaust process often causes equipment vibration, reducing the stability and service life of the equipment. Moreover, the existing pressure pipe structures on the market lack an effective buffer mechanism during the exhaust process to reduce the impact force, which may lead to increased equipment vibration and noise, thus reducing the work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an exhaustible pressure pipe for pipeline pressure testing to solve the problems raised in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An exhaustible pressure pipe for pipeline pressure testing, comprising:

[0006] An exhaustible pressure pipe assembly, including a pressure pipe body and a connector located at one end of the pressure pipe body for connecting a pressure plate;

[0007] An exhaustible branch pipe fitting, penetrating and connecting to the circumferential side of the pressure pipe body. One end of the exhaustible branch pipe fitting away from the pressure pipe body is connected with an exhaust square pipe fitting. The exhaust free end of the exhaust square pipe fitting is hermetically connected with an exhaust buffer airbag through a connecting pipe. The outer circumferential wall of the exhaust buffer airbag is hermetically connected with an exhaust end pipe;

[0008] An embedded exhaust buffer assembly, embedded into the inner cavity of the exhaust square pipe fitting, including two embedded elastic side rods elastically abutted against the inner walls on both sides of the exhaust square pipe fitting, a fixed mounting block fixedly connected to the free ends of the embedded elastic side rods, a rotating rod rotatably installed between the two fixed mounting blocks, and two buffer unloading rotating vanes symmetrically fixed on the outer circumferential wall of the rotating rod;

[0009] Wherein, one end of the connecting pipe facing away from the exhaust square pipe fitting is connected with an exhaust unloading plate extending into the inner cavity of the exhaust buffer airbag for buffer unloading exhaust. An exhaust branch valve is arranged in the inner cavity of the exhaust end pipe.

[0010] Preferably, one end of the exhaust square pipe fitting facing away from the exhaust branch pipe fitting is connected with a detachable connection end plate through bolts, and clamping grooves for elastic clamping of the embedded elastic side rods are symmetrically arranged on both inner walls of the exhaust square pipe fitting close to the detachable connection end plate.

[0011] Preferably, an arc-shaped convex part is arranged at the middle position on the opposite sides of the two embedded elastic side rods, and the two arc-shaped convex parts elastically abut against the inner walls of the clamping grooves on the opposite sides.

[0012] Preferably, sealed bearings for interference fit of the end parts of the rotating rods are embedded in the inner walls of the two fixed mounting blocks. When the gas in the inner cavity of the pressure pipe is discharged from the exhaust branch pipe fitting into the inner cavity of the exhaust square pipe fitting, the gas impacts on the buffer and force-relieving rotating vane plates, and under the action of the sealed bearings, the two buffer and force-relieving rotating vane plates are allowed to rotate. Under the action of the rotation of the buffer and force-relieving rotating vane plates, part of the buffer and force relief of the exhaust can be achieved, reducing the vibration and displacement of the equipment and improving the stability of the equipment.

[0013] Preferably, mounting notch grooves are arranged on the outer walls of the opposite sides of the two fixed mounting blocks, and a butting plate part is movably mounted in each mounting notch groove.

[0014] Preferably, four positioning columns are fixedly arranged in a rectangular distribution on the inner walls of the two butting plate parts, and four positioning holes for positioning and plugging installation of the positioning columns are arranged in a rectangular distribution on the inner walls of the mounting notch grooves.

[0015] Preferably, a plurality of butting compression springs are symmetrically mounted on the inner walls of the mounting notch grooves, and the free ends of the butting compression springs are fixedly connected to the inner walls of the adjacent butting plate parts. When the fixed mounting block fits on the inner wall in the inner cavity of the exhaust square pipe fitting, the butting plate part abuts against the inner wall of the exhaust square pipe fitting under the reverse elastic force of the butting compression spring, thereby increasing the installation stability of the fixed mounting block in the inner cavity of the exhaust square pipe fitting.

[0016] Preferably, one end of the connecting pipe penetrating into the inner cavity of the exhaust buffer airbag is fixedly connected with a cross connecting rod, a connecting straight rod is fixedly connected to the middle position of the cross connecting rod, and the exhaust force-relieving disc is fixedly mounted at the free end of the connecting straight rod. When the gas discharged from the exhaust square pipe fitting is conveyed into the inner cavity of the connecting pipe, the exhaust force-relieving disc can resist part of the gas, so as to disperse the gas in the exhaust buffer airbag and achieve the effect of dispersing and relieving force and buffering.

[0017] Preferably, on the outer walls of the two ends of the embedded elastic side rods away from the fixed mounting block, finger grooves are provided for finger picking and pulling the embedded elastic side rods to clamp and disassemble centripetally. Inside one end of the exhaustable branch pipe fitting close to the pressure pipe body, there is an exhaust valve, and a pressure gauge is connected through the outer wall of the pressure pipe body.

[0018] Compared with the prior art, the technical effects and advantages of the present utility model are as follows:

[0019] For the exhaustable pressure pipe for pipe pressure testing, when the gas in the pressure pipe body is discharged through the exhaustable branch pipe fitting, the gas first enters the exhaust square pipe fitting. Inside the exhaust square pipe fitting, the gas impacts on the buffer and force-relieving rotating vane. Due to the connection between the vane and the rotating rod, and the rotating rod is installed on the fixed mounting block through a sealed bearing, the impact force of the gas will be converted into the rotating power of the vane. The rotation of the vane consumes part of the impact force, thereby reducing the impact force during the exhaust process. By the rotation action of the buffer and force-relieving rotating vane, the impact force during the exhaust process is consumed, the vibration of the equipment during the exhaust process is reduced, the stability of the equipment is improved, the rotation action of the buffer and force-relieving rotating vane can also reduce the noise during the exhaust process and improve the working environment;

[0020] The embedded elastic side rods and the arc-shaped convex parts in the embedded exhaust buffer assembly can elastically deform according to the pressure change of gas or liquid, further reducing the impact force. Through a multi-stage buffer mechanism, it ensures a more stable exhaust process, reduces potential safety hazards that may be caused by the violent pressure change during the exhaust process, and reducing the impact force during the exhaust process helps to reduce the wear of the equipment, thereby reducing the maintenance cost;

[0021] By using the embedded exhaust buffer assembly and the exhaust force-relieving disc, the impact force during the exhaust process is effectively dispersed and absorbed. The exhaust force-relieving disc is fixed at the end of the connecting pipe through the cross connecting rod and the connecting straight rod, ensuring the stability of the exhaust force-relieving disc. By reducing the impact force during the exhaust process, the overall stability of the system is improved. By ensuring the smooth operation during the exhaust process, the failures caused by excessive impact force are reduced, and the reliability of the system is improved. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a structural schematic diagram of the present utility model;

[0024] Figure 2 Schematic diagram of the split structure of the exhaust square pipe fitting and the detachable connection end plate of the present utility model;

[0025] Figure 3 Schematic diagram of the installation structure of the embedded elastic side rod member and the exhaust square pipe fitting of the present utility model;

[0026] Figure 4 Schematic diagram of the split structure of the embedded elastic side rod member and the exhaust square pipe fitting of the present utility model;

[0027] Figure 5 Schematic diagram of the installation structure of the buffer unloading rotary vane of the present utility model;

[0028] Figure 6 Schematic diagram of the installation structure of the exhaust unloading disc of the present utility model.

[0029] Description of reference numerals:

[0030] In the figure: 1, exhaustible pressure test pipe assembly; 2, pressure test pipe body; 3, connector; 4, pressure gauge; 5, exhaustible branch pipe fitting; 6, exhaust buffer airbag; 7, exhaust end pipe; 8, exhaust valve; 9, exhaust square pipe fitting; 10, detachable connection end plate;

[0031] 11, connecting pipe; 12, exhaust branch valve; 13, embedded exhaust buffer assembly; 14, embedded elastic side rod member; 15, clamping groove; 16, buffer unloading rotary vane; 17, arc convex part; 18, fixed installation block; 19, sealed bearing; 20, rotating rod;

[0032] 21, abutting plate member; 22, installation notch groove; 23, positioning hole; 24, positioning column; 25, abutting compression spring; 26, finger part groove; 27, cross connecting rod; 28, connecting straight rod; 29, exhaust unloading disc. Detailed implementation manners

[0033] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features are not described.

[0034] Unless otherwise defined, the up, down, left, right, front, back, inner and outer directions involved herein are based on the up, down, left, right, front, back, inner and outer directions in the figures shown in the present utility model, and are hereby explained together.

[0035] This embodiment provides asFigures 1 to 6 An exhaustible pressure test pipe for pipeline pressure testing, as shown, includes: an exhaustible pressure test pipe assembly 1, an exhaust branch pipe fitting 5, and an embedded exhaust buffer assembly 13.

[0036] In this embodiment, the exhaustible pressure test pipe assembly 1 includes a pressure test pipe body 2 and a connector 3 located at one end of the pressure test pipe body 2 for connecting to a pressure test disc; the pressure test pipe body 2 bears and transmits the pressure test medium (such as gas), from the pressure test equipment to the pipeline system to be tested, serving as a pressure transmission channel to ensure that the medium can be transmitted from the pressure test equipment to the pipeline to be tested without leakage. The connector 3 connects the pressure test pipe body 2 to other components (such as pressure test equipment or pipelines) by means of threads or other connection methods, ensuring a reliable connection between the pressure test pipe body 2 and other components, providing a sealed and stable connection point, and preventing leakage during the pressure test.

[0037] In this embodiment, the exhaust branch pipe fitting 5 is connected through the side of the pressure test pipe body 2. One end of the exhaust branch pipe fitting 5 away from the pressure test pipe body 2 is connected to an exhaust square pipe fitting 9. The exhaust free end of the exhaust square pipe fitting 9 is sealed and connected to an exhaust buffer airbag 6 through a connecting pipe 11. The outer wall of the circumferential side of the exhaust buffer airbag 6 is sealed and connected to an exhaust end pipe 7. The exhaust branch pipe fitting 5 provides a branch on the pressure test pipe body 2 to release the internal gas when needed, providing a controllable exhaust path to release the gas in the pipe before or after the pressure test to avoid abnormal pressure accumulation. When the gas enters from the exhaust branch pipe fitting 5, the exhaust buffer airbag 6 will expand, thereby absorbing the pressure and buffering the pressure fluctuation during the exhaust process, reducing the impact during the exhaust process, and protecting the system from damage. The exhaust end pipe 7 guides the gas or liquid to be discharged from the exhaust buffer airbag 6, serving as an exhaust outlet to ensure that the gas can be discharged smoothly and continuously, preventing backflow. The exhaust square pipe fitting 9 provides a right-angle transition channel from the exhaust branch pipe fitting 5 to the exhaust buffer airbag 6, serving as a part of the exhaust path to ensure that the gas can smoothly transition from the exhaust branch pipe fitting 5 to the exhaust buffer airbag 6.

[0038] In this embodiment, the embedded exhaust buffer assembly 13 is embedded into the inner cavity of the exhaust square pipe fitting 9, including two embedded elastic side rods 14 elastically abutted against the inner walls on both sides of the exhaust square pipe fitting 9, a fixed mounting block 18 fixedly connected to the free ends of the embedded elastic side rods 14, a rotating rod 20 rotatably mounted between the two fixed mounting blocks 18, and two buffer unloading rotating vane plates 16 symmetrically fixed on the outer wall of the circumferential side of the rotating rod 20.

[0039] In this embodiment, one end of the connecting pipe 11 facing away from the exhaust square pipe fitting 9 is connected with an exhaust unloading disk 29 extending into the inner cavity of the exhaust buffer airbag 6 for buffer unloading and exhaust. An exhaust branch valve 12 is arranged in the inner cavity of the exhaust end pipe 7. The connecting pipe 11 connects the exhaust square pipe fitting 9 and the exhaust buffer airbag 6. As the connection between the exhaust buffer airbag 6 and the exhaust square pipe fitting 9, it ensures that gas can smoothly transition from the exhaust square pipe fitting 9 to the exhaust buffer airbag 6. The exhaust branch valve 12 controls the flow of gas from the exhaust end pipe 7 by opening or closing the valve, further controlling the exhaust process, allowing the operator to more precisely control the exhaust rate to meet different pressure test requirements. The embedded exhaust buffer assembly 13 uses elastic materials to absorb the pressure fluctuations during exhaust, reduce the pressure impact during the exhaust process, improve the stability and safety of the system, and reduce the vibration and noise caused by exhaust.

[0040] In this embodiment, one end of the exhaust square pipe fitting 9 facing away from the exhaustable branch pipe fitting 5 is connected with a detachable connection end plate 10 by bolts. On both inner walls of the exhaust square pipe fitting 9 close to the detachable connection end plate 10, clamping grooves 15 for elastic clamping of the embedded elastic side rods 14 are symmetrically provided. The detachable connection end plate 10 can be connected to the exhaust square pipe fitting 9 by bolts or other fixing methods, providing an easy-to-disassemble and assemble connection method, facilitating the maintenance and repair of the system without disassembling the entire system. The embedded elastic side rods 14 absorb pressure fluctuations through elastic deformation, providing additional support and elasticity for the embedded exhaust buffer assembly 13, enhancing the performance of the buffer assembly, and enabling it to remain stable within a larger pressure change range.

[0041] In this embodiment, an arc-shaped convex portion 17 is arranged at the middle position on the opposite sides of the two embedded elastic side rods 14. The two arc-shaped convex portions 17 are elastically abutted against the inner walls of the clamping grooves 15. By cooperating with the embedded elastic side rods 14, the clamping grooves 15 ensure the fixed position of the embedded exhaust buffer assembly 13, improve the stability of the embedded exhaust buffer assembly 13, and ensure that it will not shift during the exhaust process.

[0042] In this embodiment, sealing bearings 19 for the interference fit of the ends of the rotating rods 20 are embedded in the inner walls of the two fixed mounting blocks 18. When the gas in the inner cavity of the pressure pipe body 2 is discharged from the exhaust branch pipe fitting 5 into the inner cavity of the exhaust square pipe fitting 9, the gas impacts on the buffer unloading rotating vanes 16, and under the action of the sealing bearings 19, the two buffer unloading rotating vanes 16 are enabled to rotate. Under the action of the rotation of the buffer unloading rotating vanes 16, part of the buffer unloading of the exhaust can be provided, reducing the vibration and displacement of the equipment and improving the stability of the equipment. The buffer unloading rotating vanes 16 consume the energy during the exhaust process through rotation, reducing the vibration and noise caused by the pressure impact during the exhaust process, and improving the stability and service life of the system. The rotating rod 20 serves as the rotating shaft of the buffer unloading rotating vanes 16, supporting the rotational movement of the buffer unloading rotating vanes 16 to ensure that the buffer unloading rotating vanes 16 can rotate smoothly and reducing the impact during the exhaust process.

[0043] In this embodiment, mounting notch grooves 22 are formed in the outer walls of the opposite sides of the two fixed mounting blocks 18. A contact plate member 21 is movably mounted in each mounting notch groove 22. Four positioning posts 24 are fixedly arranged in a rectangular distribution on the inner walls of the two contact plate members 21. Four positioning holes 23 for the positioning and plugging installation of the positioning posts 24 are formed in a rectangular distribution on the inner wall of the mounting notch groove 22. A plurality of contact compression springs 25 are symmetrically mounted on the inner wall of the mounting notch groove 22, and the free ends of the contact compression springs 25 are fixedly connected to the inner wall of the adjacent contact plate member 21. When the fixed mounting block 18 fits against the inner wall in the inner cavity of the exhaust square pipe fitting 9, the contact plate member 21 abuts against the inner wall of the exhaust square pipe fitting 9 under the reverse elastic force of the contact compression spring 25, thereby increasing the installation stability of the fixed mounting block 18 in the inner cavity of the exhaust square pipe fitting 9.

[0044] In this embodiment, the contact plate member 21 ensures the stability of the position of the buffer unloading rotating vanes 16 by contacting and fixing the fixed mounting block 18, provides additional support and fixation, enhances the overall stability of the buffer unloading rotating vanes 16, and reduces the displacement caused by the vibration during the exhaust process. The positioning posts 24 fix the position of the contact plate member 21 by inserting into the positioning holes 23, ensuring the accurate position of the contact plate member 21 and improving the stability of the system. The contact compression springs 25 generate a thrust force through elastic deformation, providing an elastic force between the contact plate member 21 and the fixed mounting block 18 to ensure that the contact plate member 21 always closely adheres to the fixed mounting block 18 and reducing the displacement caused by the vibration during the exhaust process.

[0045] In this embodiment, one end of the connecting pipe 11 running through into the inner cavity of the exhaust buffer airbag 6 is fixedly connected with a cross connecting rod 27. A connecting straight rod 28 is fixedly connected to the middle position of the cross connecting rod 27. The exhaust pressure relief disc 29 is fixedly installed at the free end of the connecting straight rod 28. When the gas discharged from the exhaust square pipe fitting 9 is conveyed into the inner cavity of the connecting pipe 11, the exhaust pressure relief disc 29 can resist part of the gas, so as to disperse the gas in the exhaust buffer airbag 6, achieving the effect of dispersing and relieving force and buffering. The exhaust pressure relief disc 29 reduces the impact force by dispersing the gas during the exhaust process, evenly distributes the gas, reduces the impact during the exhaust process, reduces the vibration and noise during the exhaust process, and improves the stability and efficiency of the system.

[0046] In this embodiment, finger part grooves 26 for finger picking and prying to make the inlaid elastic side rods 14 clamp and disassemble centripetally are formed on the outer walls of the two inlaid elastic side rods 14 away from the fixed installation block 18. The exhaust branch pipe fitting 5 has an exhaust valve 8 at one end close to the pressure test pipe body 2. A pressure gauge 4 is connected through the outer wall of the pressure test pipe body 2. The pressure gauge 4 indicates the pressure value by sensing the pressure change inside the pipe, monitors the pressure level inside the pressure test pipe, enables the operator to observe the pressure change during the pressure test in real time, and ensures that the pressure test process is carried out within a safe range. The exhaust valve 8 controls the flow of gas by opening or closing the valve, allowing the operator to precisely control the exhaust rate and ensuring the safety and controllability of the pressure test process.

[0047] Working principle:

[0048] For the exhaustible pressure test pipe for pipe pressure test, the pressure test pipe body 2 is the main part of the whole system. It connects the pressure test equipment and other required pipes. The exhaustible branch pipe fitting 5 is connected to the side of the pressure test pipe body 2 and is used to control the discharge of gas or liquid. The exhaust square pipe fitting 9 is connected to the exhaustible branch pipe fitting 5 and is used to guide the gas discharged from the pressure test pipe body 2 to the exhaust buffer airbag 6. The exhaust buffer airbag 6 is a soft container used to receive the gas or liquid discharged from the exhaust square pipe fitting 9 and plays a buffering role. The connecting pipe 11 connects the exhaust square pipe fitting 9 and the exhaust buffer airbag 6 to ensure that the gas can smoothly transition into the exhaust buffer airbag 6.

[0049] When exhaust is needed, the operator opens the exhaust valve 8 and the exhaust branch valve 12. The gas enters the exhaust square pipe fitting 9 from the pressure test pipe body 2 through the exhaustible branch pipe fitting 5. The inlaid exhaust buffer assembly 13 is installed in the exhaust square pipe fitting 9 and is used to further reduce the pressure fluctuation during the exhaust process. The inlaid elastic side rods 14 are two elastic components that elastically abut against the clamping grooves 15 on the inner wall of the exhaust square pipe fitting 9 and can elastically deform according to the pressure change.

[0050] The buffer unloading rotary vane 16 is installed between two fixed mounting blocks 18 and fixed by a rotating rod 20 and a sealing bearing 19. When gas impacts on the buffer unloading rotary vane 16, the buffer unloading rotary vane 16 will rotate under the action of the sealing bearing 19, thereby consuming part of the impact force and reducing the pressure fluctuation during the exhaust process;

[0051] The abutting plate member 21 is installed on the outer side of the fixed mounting block 18 for further fixing the position of the buffer unloading rotary vane 16. The abutting compression spring 25 is located in the mounting notch groove 22 and is used to provide an elastic force between the abutting plate member 21 and the fixed mounting block 18 to ensure that the abutting plate member 21 always remains in contact with the fixed mounting block 18. The exhaust unloading disc 29 is installed at the end of the connecting pipe 11 and is located inside the exhaust buffer airbag 6. It is used to further disperse the gas or liquid discharged from the exhaust square pipe fitting 9 and reduce the impact force. The gas or liquid continues to enter the exhaust buffer airbag 6 through the connecting pipe 11 and is further dispersed under the action of the exhaust unloading disc 29 to reduce the impact force.

[0052] Finally, the gas is discharged from the system through the exhaust end pipe 7.

[0053] It should be noted that in this article, relational terms such as "one" and "two" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" 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 not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0054] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An exhaustible pressure test pipe for pipeline pressure testing, characterized in that, Comprising: An exhaustible pressure testing pipe assembly (1), including a pressure testing pipe body (2) and a connector (3) located at one end of the pressure testing pipe body (2) for connecting to a pressure testing plate; An exhaustible branch pipe fitting (5), penetrating and connected to the circumferential side of the pressure testing pipe body (2). One end of the exhaustible branch pipe fitting (5) away from the pressure testing pipe body (2) is connected to an exhaust square pipe fitting (9). The exhaust free end of the exhaust square pipe fitting (9) is hermetically connected to an exhaust buffer airbag (6) through a connecting pipe (11). The outer circumferential wall of the exhaust buffer airbag (6) is hermetically connected to an exhaust end pipe (7); An embedded exhaust buffer assembly (13), embedded into the inner cavity of the exhaust square pipe fitting (9), including two embedded elastic side rods (14) elastically abutting against the inner walls on both sides of the exhaust square pipe fitting (9), a fixed mounting block (18) fixedly connected to the free ends of the embedded elastic side rods (14), a rotating rod (20) rotatably mounted between the two fixed mounting blocks (18), and two buffer unloading rotating vane plates (16) symmetrically fixed on the outer circumferential wall of the rotating rod (20); Among them, one end of the connecting pipe (11) facing away from the exhaust square pipe fitting (9) is connected to an exhaust unloading plate (29) extending into the inner cavity of the exhaust buffer airbag (6) for buffer unloading and exhausting. An exhaust branch valve (12) is arranged in the inner cavity of the exhaust end pipe (7).

2. The exhaustible pressure test pipe for pipeline pressure test according to claim 1, characterized in that: One end of the exhaust square pipe fitting (9) facing away from the exhaustible branch pipe fitting (5) is bolted with a detachable connection end plate (10). On the inner walls on both sides of the exhaust square pipe fitting (9) close to the detachable connection end plate (10), clamping grooves (15) for elastic clamping of the embedded elastic side rods (14) are symmetrically arranged.

3. The exhaustible pressure test pipe for pipeline pressure test according to claim 2, characterized in that: An arc-shaped convex part (17) is arranged at the middle position on the opposite sides of the two embedded elastic side rods (14). The two arc-shaped convex parts (17) elastically abut against the inner walls of the clamping grooves (15) on the opposite sides.

4. The exhaustible pressure test pipe for pipeline pressure test according to claim 3, characterized in that: Sealing bearings (19) for interference fit of the ends of the rotating rod (20) are embedded in the inner walls of the two fixed mounting blocks (18).

5. The exhaustible pressure test pipe for pipeline pressure test according to claim 4, wherein: Installation notch grooves (22) are arranged on the outer walls on the opposite sides of the two fixed mounting blocks (18). Abutting plate members (21) are movably installed in each installation notch groove (22).

6. The exhaustible pressure test pipe for pipeline pressure test according to claim 5, characterized in that: Four positioning columns (24) are fixedly arranged in a rectangular distribution on the inner walls of the two abutting plate members (21). Four positioning holes (23) for positioning and plugging installation of the positioning columns (24) are arranged in a rectangular distribution on the inner wall of the installation notch groove (22).

7. The exhaustible pressure testing pipe for pipeline pressure testing according to claim 6, characterized in that: A plurality of abutting compression springs (25) are symmetrically installed on the inner wall of the installation notch groove (22). The free ends of the abutting compression springs (25) are fixedly connected to the inner walls of the adjacent abutting plate members (21).

8. An exhaustible pressure test pipe for pipeline pressure test according to claim 7, characterized in that: One end of the connecting pipe (11) penetrating into the inner cavity of the exhaust buffer airbag (6) is fixedly connected to a cross connecting rod (27). A connecting straight rod (28) is fixedly connected to the middle position of the cross connecting rod (27). The exhaust unloading plate (29) is fixedly installed at the free end of the connecting straight rod (28).

9. The exhaustible pressure test pipe for pipeline pressure test according to claim 8, characterized in that: Finger groove portions (26) for finger prying to move the embedded elastic side rods (14) for centripetal clamping and disassembly are formed on the outer walls of the ends of the two embedded elastic side rods (14) far from the fixed mounting blocks (18).

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