Pipe pressing tool with axial force detection function

Abstract

A pipe pressing tool with an axial force detection function comprises a pipe. The plastic connectors are fixedly connected to the outer diameters of the two ends of the pipe, the blind plate components and the flange rings are detachably connected to the two ends of the plastic connectors, the sealing mandrel is fixedly connected to the blind plate components, the sealing ring is connected to the sealing mandrel in a sleeving mode, and the pressing ring is connected to the sealing ring in a pressed mode through bolts. The blind plate component comprises a water injection side blind plate and a blind plate, the water injection side blind plate is provided with a water inlet hole and an exhaust hole, and the water inlet hole and the exhaust hole penetrate through the water injection side blind plate. According to the invention, the sealing mandrel and the blind plate are welded together, and the blind plate is connected with the winding joint of the pipe, so that the limitation of the middle axis is eliminated, and the pipe can generate longitudinal and transverse deformation when being pressed, thereby realizing the effective detection of the axial force.

Description

Technical Field

[0001] The invention relates to the technical field of pipe pressure testing, in particular to a pipe pressure tool with axial force detection function. Background Art

[0002] In the field of pipe pressure testing, traditional annular pipe pressure testing tools are mainly used to apply annular pressure. The design concept is to ensure the safety and reliability of the pipe during use by applying pressure along the circumferential direction of the pipe. However, this traditional design has significant limitations. Most existing pressure testing tools use an I-shaped intermediate axis structure, which is fixed inside the pipe. As a result, the longitudinal deformation of the pipe is limited when pressure is applied, and the axial force of the pipe under pressure cannot be effectively measured. This design not only limits the free deformation of the pipe, but also creates a blind spot in the overall performance evaluation of the pipe under high pressure, making it impossible to fully understand the mechanical properties of the pipe in actual use.

[0003] In addition, the existing pressure test tools can usually only measure the annular pressure, and cannot simultaneously monitor the changes in the axial force and annular force generated by the pipe when it is under pressure. This makes the overall performance evaluation of the pipe lack of comprehensiveness, especially in high-pressure industries such as oil and natural gas, and cannot provide sufficient data support for the design and use of pipes. Therefore, there is an urgent need for a new type of pipe pressure test tool that can simultaneously detect axial force and annular force, thereby improving the accuracy and reliability of pipe pressure testing. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pipe pressing tool with axial force detection to solve the problem that the axial force cannot be detected in the prior art.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: A pipe pressing tool with axial force detection includes a pipe, and also includes a plastic joint fixedly connected to the outer diameter of both ends of the pipe, a blind plate component and a flange ring detachably connected to both ends of the plastic joint, a sealing core shaft fixedly connected to the blind plate component, a sealing ring sleeved on the sealing core shaft, and a compression ring connected to the sealing ring by bolts; the blind plate component includes a water injection side blind plate and a blind plate, wherein the water injection side blind plate is provided with a water inlet hole and an exhaust hole, and the water inlet hole and the exhaust hole penetrate the water injection side blind plate.

[0006] Further preferably, the plastic joint is provided with holes corresponding to the blind plate component and the flange ring, and their sizes and distribution positions are matched. Bolts pass through the corresponding holes on the blind plate component, the plastic joint and the flange ring in sequence to connect the blind plate component, the plastic joint and the flange ring together.

[0007] Further preferably, the plastic joint is formed by wrapping hot-melt plastic around a pipe to form an annular plastic joint.

[0008] Further preferably, the flange ring is composed of two semicircular rings and presents a ring-shaped structure.

[0009] Further preferably, the sealing core shaft is installed in the central cavity at both ends of the tube, and the sealing core shaft comprises a first sealing core shaft and a second sealing core shaft, wherein the first sealing core shaft is fixedly connected to the second sealing core shaft and is in the shape of a hollow stepped shaft.

[0010] Further preferably, the first sealing core shaft is fixedly connected to the blind plate component by welding, and the outer diameter of the first sealing core shaft is smaller than the outer diameter of the second sealing core shaft.

[0011] Further preferably, the outer diameter of the second sealing core shaft is consistent with the inner diameter of the tube, and one end of the second sealing core shaft is provided with a chamfer, and the chamfer is located at the end facing the inner wall of the tube.

[0012] Further preferably, the pressure ring is an annular structure, the inner diameter of the pressure ring matches the outer diameter of the first sealing core shaft, and the pressure ring is sleeved on the first sealing core shaft.

[0013] Further preferably, the pipe pressing tool also includes a handle fixedly connected to the water injection side blind plate and the blind plate.

[0014] Further preferably, the calculation formula for detecting the axial force is: F=P*S; wherein P is the pressure holding strength, and S is the cross-sectional area of ​​the pipe.

[0015] The beneficial effects of adopting the above technical solution are: By welding the sealing core shaft and the blind plate together, and connecting the blind plate to the winding joint of the pipe, the limitation of the middle axis is eliminated, and the pipe can undergo longitudinal and transverse deformation when under pressure, thereby achieving effective detection of the axial force.

[0016] The present invention can detect the axial force and the circumferential force simultaneously when the pipe is under pressure, thus overcoming the limitations of the traditional pressing tooling. This dual detection capability makes the evaluation of the pipe performance more comprehensive and can provide a more reliable basis for the safe use of the pipe.

[0017] The installation process of the present invention is simple, and the user only needs to install the sealing mandrel, the pressure ring and the blind plate according to the prescribed steps to complete the assembly of the entire pressing tool. This simplification not only improves work efficiency, but also reduces the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0019] In the figure: 1-pipe; 2-plastic joint; 3-blind plate component; 31-blind plate on the water injection side; 311-water inlet hole; 312-exhaust hole; 32-blind plate; 4-flange ring; 5-sealing mandrel; 51-first sealing mandrel; 52-second sealing mandrel; 6-sealing ring; 7-pressure ring; 8-handle. DETAILED DESCRIPTION

[0020] In order to make the features and advantages of the present invention more obvious and easy to understand, the technical solution will be clearly and completely described below in combination with the drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0021] like Figure 1-3 As shown, a pipe pressing tool with axial force detection provided by the present invention is composed of the following main components: pipe 1, plastic joint 2, blind plate component 3, flange ring 4, sealing core shaft 5, sealing ring 6, pressure ring 7, and handle 8.

[0022] The pipe 1 is placed on a lathe and rotated along the axis to wrap the molten plastic around the two ends of the pipe. After cooling, a plastic joint 2 is formed that is fixed to the two ends of the pipe 1 in an annular shape. A plurality of bolt holes are provided on the plastic joint 2. The size and position of the holes of the plastic joint 2 must be consistent with the size and position of the blind plate component 3 and the flange ring 4. The bolts pass through the corresponding holes on the blind plate component 3, the plastic joint 2 and the flange ring 4 in turn to connect the three components together; the flange ring 4 is composed of two semicircles. The blind plate component 3 includes a water injection side blind plate 31 and a blind plate 32, which are respectively located at the two ends of the pipe 1. The water injection side blind plate 31 is provided with a water inlet hole 311 and an exhaust hole 312, while the blind plate at the other end of the pipe 1 is not provided with a water inlet hole and an exhaust hole. Water is injected into the pipe 1 from the water inlet 311. When water flows out from the exhaust hole 312, it proves that the water in the pipe 1 has been filled. At this time, the water inlet 311 and the exhaust hole 312 are blocked with screws, and the pipe 1 is pressurized to prepare for the subsequent detection of bursting pressure, annular force and axial force. The sealing core shaft 5 specifically includes two hollow cylinders of different diameters, specifically the first sealing core shaft 51 and the second sealing core shaft 52. The first sealing core shaft 51 is fixedly connected to the second sealing core shaft 52 and is in the shape of a hollow stepped shaft. The first sealing core shaft 51 is fixedly connected to the blind plate component 3 by welding. The outer diameter of the first sealing core shaft 51 is smaller than the outer diameter of the second sealing core shaft 52. The outer diameter of the second sealing core shaft 52 is consistent with the inner diameter of the pipe 1. One end of the second sealing core shaft 52 is provided with a chamfer, which is located at the end facing the inner wall of the pipe. The chamfer has a guiding effect on the sealing core shaft 5. The sealing ring 6 is sleeved on the first sealing core shaft 51, and the pressure ring 7 is also sleeved on the first sealing core shaft 51. The inner diameter of the pressure ring 7 matches the outer diameter of the first sealing core shaft 51. The bolt passes through the blind plate component 3 and presses the pressure ring 7, which is tightly connected to the sealing ring. The sealing core shaft 5, the sealing ring 6 and the pressure ring 7 cooperate with each other, so that the device achieves a sealing effect. The pipe pressing tool also includes a handle 8 fixedly connected to the blind plate (31) and the blind plate (32) on the water injection side. The handle 8 assists workers in moving the pipe pressing tool, making the operation convenient and conducive to improving work efficiency.

[0023] The sealing mandrel is welded with the blind plate, making the whole structure more compact and stable. The blind plate is connected to the winding joint on the pipe by bolts to form a completely sealed system. This design makes the inside of the pipe no longer restricted by the axis, and can freely deform in the annular direction and axial direction, thereby realizing effective detection of axial force. Example

[0024] When in use, after the pipe 1 is filled with water, a pipe pressure test tool with axial force detection is connected to the electric pressure test pump through the outside to provide the required pressure for the test. First, the initial test strength of the pipe 1 is set to twice its nominal pressure. Then, a pressure holding test is carried out at this pressure for four hours to observe whether the pipe has any cracks. After confirming that the pipe is not broken, continue to increase the pressure until the pipe breaks to obtain the bursting pressure of the pipe. During the pressure holding process, the pipe will undergo longitudinal and transverse stretching due to the combined effect of axial force and circumferential force inside the pipe. The axial force and circumferential force borne by the pipe can be accurately calculated based on the relationship between the set pressure holding strength and the cross-sectional area of ​​the pipe. The calculation formula for the axial force is: F=P*S; where P is the pressure holding strength and S is the cross-sectional area of ​​the pipe.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pipe pressing tool with axial force detection, comprising a pipe (1), characterized in that: It also comprises a plastic joint (2) fixedly connected to the outer diameter of both ends of the pipe (1), a blind plate component (3) and a flange ring (4) detachably connected to both ends of the plastic joint (2), a sealing mandrel (5) fixedly connected to the blind plate component (3), a sealing ring (6) sleeved on the sealing mandrel (5), and a pressure ring (7) connected to the sealing ring (6) by bolt compression; the blind plate component (3) comprises a water injection side blind plate (31) and a blind plate (32), wherein the water injection side blind plate (31) is provided with a water inlet hole (311) and an exhaust hole (312), and the water inlet hole (311) and the exhaust hole (312) penetrate the water injection side blind plate (31).

2. A pipe pressing tool with axial force detection according to claim 1, characterized in that: The plastic joint (2) is provided with holes corresponding to the blind plate component (3) and the flange ring (4), and the sizes and distribution positions of the holes are matched. Bolts pass through the corresponding holes on the blind plate component (3), the plastic joint (2) and the flange ring (4) in sequence, thereby connecting the blind plate component (3), the plastic joint (2) and the flange ring (4) together.

3. The pipe pressing tool with axial force detection according to claim 1 is characterized in that: The plastic joint (2) is formed by wrapping hot-melt plastic around a pipe (1) to form a ring-shaped plastic joint (2).

4. The pipe pressing tool with axial force detection according to claim 1 is characterized in that: The flange ring (4) consists of two semicircular rings and presents a ring-shaped structure.

5. The pipe pressing tool with axial force detection according to claim 1 is characterized in that: The sealing core shaft (5) is installed in the central cavity at both ends of the pipe (1), and the sealing core shaft (5) comprises a first sealing core shaft (51) and a second sealing core shaft (52), wherein the first sealing core shaft (51) and the second sealing core shaft (52) are fixedly connected and are in the shape of a hollow stepped shaft.

6. The pipe pressing tool with axial force detection according to claim 5, characterized in that: The first sealing core shaft (51) is fixedly connected to the blind plate component (3) by welding, and the outer diameter of the first sealing core shaft (51) is smaller than the outer diameter of the second sealing core shaft (52).

7. The pipe pressing tool with axial force detection according to claim 5, characterized in that: The outer diameter of the second sealing core shaft (52) is consistent with the inner diameter of the tube (1), and one end of the second sealing core shaft (52) is provided with a chamfer, the chamfer being located at the end facing the inner wall of the tube.

8. The pipe pressing tool with axial force detection according to claim 5, characterized in that: The pressure ring (7) is an annular structure; the inner diameter of the pressure ring (7) matches the outer diameter of the first sealing core shaft (51), and is sleeved on the first sealing core shaft (51).

9. The pipe pressing tool with axial force detection according to claim 1, characterized in that: The pipe pressing tool further comprises a handle (8) fixedly connected to the water injection side blind plate (31) and the blind plate (32).

10. The pipe pressing tool with axial force detection according to claim 1, characterized in that: The calculation formula for the detected axial force is: F=P*S; wherein P is the pressure holding strength and S is the cross-sectional area of ​​the pipe.

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