Treatment device for welding seam on inner surface of pipeline

Abstract

The invention provides a treatment device for welding seams on the inner surface of a pipeline, and relates to the technical field of pipeline welding seam treatment. The water inlet assembly comprises a water inlet pipe, and one end of the water inlet pipe is communicated with an external pressurized water source. The water outlet assembly comprises a water outlet pipe, at least two water distribution pipes and nozzles in one-to-one correspondence with the water distribution pipes, the water inlet pipe is rotatably sleeved with one end of the water outlet pipe, the water distribution pipes are evenly distributed at the end, away from the water inlet pipe, of the water outlet pipe in the circumferential direction of the water outlet pipe, and the water distribution pipes communicate with the water outlet pipe. The nozzles are mounted at the ends, away from the water outlet pipes, of the distributive pipes; wherein included angles exist between the spraying directions of the nozzles and the axial directions of the water distribution pipes, and the spraying directions of the nozzles are located in the plane where the axial directions of the at least two water distribution pipes are located. According to the method, strengthening treatment of the weld joint can be effectively guaranteed, the method can be effectively suitable for various complex and narrow machining sites, and the problem of secondary pollution can be effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline weld processing, and in particular to a processing device for pipeline inner surface welds. Background Art

[0002] At present, for pipeline connection technology, especially pressure pipeline, generally including welding, threaded connection, flange connection and socket connection, among which welding is the most commonly used and widely applicable connection method. The advantages of welding are high welding strength, good welding sealing, strong corrosion resistance (welding can reduce the number of joints, thereby reducing potential corrosion points), smooth inner wall (welding will not form bulges or obstructions on the inner wall of the pipeline, which can reduce fluid resistance and reduce pumping costs), etc.

[0003] However, the welds of pressure pipes are also prone to damage and failure, such as stress corrosion cracking, fatigue cracking, etc., which seriously affect the normal operation of the equipment and cause serious economic losses. At present, shot peening and other surface treatment processes are generally used to treat welds. However, existing shot peening and other surface treatment processes have poor field applicability and secondary pollution problems. Summary of the invention

[0004] In order to solve the technical problems in the related art, the present application provides a processing device for the inner surface weld of a pipeline. The processing device for the inner surface weld of a pipeline of the present application can not only effectively ensure the strengthening treatment of the weld, but also can be effectively applied to various complex and narrow processing sites, and can also effectively avoid the problem of secondary pollution.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: a processing device for the weld on the inner surface of a pipeline, comprising:

[0006] A water inlet assembly, comprising a water inlet pipe, one end of which is used to communicate with an external pressurized water source;

[0007] A water outlet assembly, comprising a water outlet pipe and at least two water branch pipes, and nozzles corresponding to the water branch pipes one by one, wherein one end of the water outlet pipe is rotatably sleeved outside the water inlet pipe, at least three water branch pipes are evenly distributed along the circumference of the water outlet pipe at one end of the water outlet pipe away from the water inlet pipe, the water branch pipes are connected to the water outlet pipe, and the nozzles are installed at one end of the water branch pipe away from the water outlet pipe;

[0008] There is an included angle between the spraying direction of the nozzle and the axial direction of the water distribution pipe, and the spraying direction of the nozzle is located in a plane where the axial directions of at least three water distribution pipes are located.

[0009] Optionally, an angle β between the spraying direction of the nozzle and the axial direction of the water distribution pipe satisfies: 0°<β≤2°.

[0010] Optionally, the inner diameter of the water inlet pipe is the same as the inner diameter of the water outlet pipe.

[0011] Optionally, the water outlet pipe comprises a first pipe section, a connecting ring and a second pipe section which are coaxially arranged, the radial dimension of the first pipe section is smaller than the radial dimension of the second pipe section, one end of the first pipe section is used to be connected to the water distribution pipe, the other end of the first pipe section is connected to one side of the connecting ring, the second pipe section is connected to a side of the connecting ring away from the first pipe section, and the outer circumferential surface of the connecting ring is inwardly recessed to form a plurality of threaded blind holes evenly distributed along the circumference of the connecting ring;

[0012] The processing device for the weld on the inner surface of the pipeline also includes a wrapping sleeve, a sealing ring and a mounting bolt. The wrapping sleeve includes a coaxially connected top ring and a sleeve section. The top ring is sleeved on the outside of the water inlet pipe. The end of the sleeve section away from the top ring is formed with a mounting through hole which corresponds to the threaded blind hole one by one. The mounting bolt is passed through the mounting through hole and threadedly connected to the threaded blind hole. The sealing ring is interference fitted in a cavity enclosed by the top ring, the second pipe section, the connecting ring and the water inlet pipe.

[0013] Optionally, the water inlet assembly further includes a convex ring sleeved outside the water inlet pipe;

[0014] The inner surface of the sealing ring is recessed inwardly to form a notch that matches the convex ring.

[0015] Optionally, the number of the threaded blind holes is set to 2 to 6.

[0016] Optionally, the processing device for the pipe inner surface weld further includes a driving member and a conducting block, wherein the output end of the driving member is connected to the conducting block to drive the conducting block to move along the axial direction of the water inlet pipe;

[0017] The conduction block is connected to the water inlet pipe, and a receiving cavity which is in communication with the water inlet pipe is formed in the conduction block, and the other end of the receiving cavity is used to be in communication with an external pressurized water source.

[0018] Optionally, the processing device for the inner surface weld of the pipeline also includes a connecting hose, and the top surface of the conducting block is recessed inward to form a mounting hole that is interconnected with the accommodating cavity, one end of the connecting hose is installed in the mounting hole, and the other end of the connecting hose is used to connect with an external pressurized water source.

[0019] Beneficial effects:

[0020] 1. Through the above technical scheme, on the one hand, the present application utilizes the water inlet assembly and the water outlet assembly to realize the cavitation water jet surface strengthening treatment of the weld, and can utilize the high-speed water jet to generate a large number of tiny cavitations on the weld surface. These large numbers of tiny cavitations can collapse on the surface of the weld and generate impact pressures of up to 1,000 MPa and tiny jets, thereby forming a compressive stress layer on the weld surface, thereby achieving weld surface strengthening and inhibiting the generation of damage cracks, which can effectively ensure the strengthening treatment of the weld.

[0021] On the other hand, the device for treating the inner surface weld of the pipeline of the present application is relatively small in size and arranged in a strip shape, and can be well adapted to various complex and narrow processing sites. At the same time, the surface treatment of the weld is achieved by using cavitation water jet, and there will be no secondary pollution problem.

[0022] On the other hand, the nozzle provided in the present application has a special arrangement position, that is, there is an angle between the spray direction of the nozzle and the axial direction of the water distribution pipe and the spray direction is located in the plane where the axial directions of all the water distribution pipes are located. In this way, the reaction force generated when the nozzle is working can make the water outlet component rotate around the axial direction of the water inlet pipe, so that the water outlet component can rotate while spraying the cavitation water jet, thereby effectively ensuring the processing efficiency and processing range of the weld.

[0023] 2. Other beneficial effects or advantages of the present application will be described in detail in conjunction with the specific structure in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor. In addition, it should be understood that the proportional relationship of the various components in the drawings of this specification does not represent the proportional relationship in the actual material selection and design, which is only a schematic diagram of the structure or position, where:

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of a device for processing a weld on the inner surface of a pipeline provided by an exemplary embodiment of the present application when in use, wherein the pipeline and the weld on the pipeline are also shown;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of a device for processing a weld on the inner surface of a pipeline provided by an exemplary embodiment of the present application;

[0027] Figure 3It is a schematic diagram of the assembly structure of a device for processing a weld on the inner surface of a pipeline provided by an exemplary embodiment of the present application;

[0028] Figure 4 is a schematic diagram of a partial cross-sectional structure of a device for processing a weld on an inner surface of a pipeline provided by an exemplary embodiment of the present application;

[0029] Figure 5 yes Figure 4 A schematic diagram of the enlarged local structure at point A in the middle;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of a sealing ring provided in an exemplary embodiment of the present application.

[0031] Description of the reference numerals in the accompanying drawings:

[0032] 100-a device for processing the weld on the inner surface of a pipeline; 1-a water inlet assembly; 11-a water inlet pipe; 12-a convex ring; 2-a water outlet assembly; 21-a water outlet pipe; 211-a first pipe section; 212-a connecting ring; 2121-a threaded blind hole; 213-a second pipe section; 22-a water distribution pipe; 23-a nozzle; 3-a wrapping sleeve; 31-abutting ring; 32-a sleeve section; 321-a mounting through hole; 4-a sealing ring; 41-a notch; 5-a mounting bolt; 6-a driving member; 7-a conducting block; 71-a accommodating chamber; 72-a mounting hole; 8-a connecting hose. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] In the description of this application, it should be noted that the terms used, such as "first" and "second", are only used to distinguish expressions, and do not indicate or imply differences in importance or order; the terms used, such as "inner" and "outer", refer to the inside and outside of a specific contour. The use of the above terms is only to facilitate a clear and simple description of the technical solution of this application, and cannot be understood as a limitation of this application.

[0036] At present, for the treatment of pipeline welds, cavitation water jet surface strengthening treatment can also be used. A large number of tiny cavitation groups can be generated by high-speed water jets. When the cavitation groups collapse near the solid boundary, impact pressures and microjets of up to thousands of MPa are generated, forming a compressive stress layer on the surface, thereby achieving the effect of surface strengthening and inhibiting the initiation of environmental damage cracks.

[0037] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0038] Example 1

[0039] like Figures 1 to 6 As shown, this embodiment provides a processing device 100 for the weld on the inner surface of a pipeline, comprising a water inlet component 1 and a water outlet component 2. The water inlet component 1 comprises a water inlet pipe 11, one end of which is used to communicate with an external pressurized water source. The water outlet component 2 comprises a water outlet pipe 21 and at least two water branch pipes 22, and a nozzle 23 corresponding to the water branch pipes 22. One end of the water outlet pipe 21 is rotatably sleeved outside the water inlet pipe 11, and at least two water branch pipes 22 are respectively evenly distributed along the circumference of the water outlet pipe 21 at one end of the water outlet pipe 21 away from the water inlet pipe 11, and the water branch pipes 22 are connected to the water outlet pipe 21. The nozzle 23 is installed at one end of the water branch pipe 22 away from the water outlet pipe 21. Among them, the spray direction of the nozzle 23 is at an angle with the axial direction of the water branch pipe 22, and the spray direction of the nozzle 23 is located in the plane where the axial directions of at least two water branch pipes 22 are located.

[0040] Through the above technical scheme, on the one hand, the present application utilizes the water inlet component 1 and the water outlet component 2 to realize the cavitation water jet surface strengthening treatment of the weld, and can utilize the high-speed water jet to generate a large number of tiny cavitations on the weld surface. These large numbers of tiny cavitations can collapse on the surface of the weld and generate impact pressures of up to 1000 megapascals and tiny jets, thereby forming a compressive stress layer on the weld surface, thereby achieving weld surface strengthening and inhibiting the generation of damage cracks, which can effectively ensure the strengthening treatment of the weld.

[0041] On the other hand, the device 100 for treating the inner surface weld of a pipeline of the present application is relatively small in size and arranged in a strip shape, and can be well adapted to various complex and narrow processing sites. At the same time, the weld surface treatment is achieved by using cavitation water jet, and there will be no secondary pollution problem.

[0042] On the other hand, the nozzle 23 provided in the present application has a special arrangement position, that is, the spraying direction of the nozzle 23 has an angle with the axial direction of the water distribution pipe 22 and the spraying direction is located in the plane where the axial directions of all the water distribution pipes 22 are located. In this way, the reaction force generated by the nozzle 23 when working can make the water outlet component 2 rotate stably around the axial direction of the water inlet pipe 11, so that the water outlet component 2 can rotate while spraying the cavitation water jet, thereby effectively ensuring the processing efficiency and processing range of the weld.

[0043] In this embodiment, it can be understood that

[0044] First, in the present application, the pressure of the external pressurized water source can be selected according to the actual pipe material and weld type. For example, the pressure of the external pressurized water source can be set to 10 MPa to 60 MPa, and the present application does not make specific limitations on this.

[0045] Second, the number of water distribution pipes 22 can also be adjusted according to the inner diameter of the pipeline. For example, the number of water distribution pipes 22 can be set to 2 to 12, etc., and the present application does not make specific restrictions on this. Among them, the reason why the present application sets the number of water distribution pipes 22 to at least two is that when the water distribution pipe 22 is set to 1, the effect of rotating while spraying the cavitation water jet cannot be achieved as desired by the present application. Specifically, when the number of water distribution pipes 22 is set to 1, the water distribution pipe 22 will be unevenly stressed due to the spraying of the cavitation water jet, and then the water outlet component 2 will be offset and may cause spatial interference with the inner wall of the pipeline.

[0046] Third, the present application arranges the water distribution pipe 22 to be evenly distributed along the circumference of the water outlet pipe 21, so that the reaction force generated by the nozzle 23 arranged at the water outlet of the water distribution pipe 22 can be partially offset in the radial direction of the water distribution pipe 22, thereby driving the water outlet pipe 21 to rotate in the circumferential direction of the water outlet pipe 21.

[0047] In one embodiment of the present application, the angle β between the injection direction of the nozzle 23 of the present application and the axial direction of the water distribution pipe 22 satisfies: 0°<β≤2°. It is understandable that the angle between the injection direction of the nozzle 23 and the axial direction of the water distribution pipe 22 is not too small or too large. A too small angle, such as 0°, will cause the reaction force of the nozzle 23 to be unable to drive the water outlet component 2 to rotate, and a too large angle will cause mutual interference between the nozzles 23. For example, the cavitation water jets ejected by two adjacent nozzles 23 impact each other before contacting the inner wall of the pipe, or the cavitation water jet ejected by a certain nozzle 23 impacts a certain water distribution pipe 22. Therefore, the present application sets the angle β between the injection direction of the nozzle 23 and the axial direction of the water distribution pipe 22 to: 0°<β≤2°.

[0048] In one embodiment of the present application, Figure 4 and Figure 5 As shown, the inner diameter of the water inlet pipe 11 of the present application is the same as the inner diameter of the water outlet pipe 21. In this way, the cavitation water jet output through the water inlet pipe 11 can enter the water outlet pipe 21 more stably and reliably, which is conducive to reducing the fluid resistance of the cavitation water jet at the joint of the water inlet pipe 11 and the water outlet pipe 21, thereby effectively reducing the pumping cost and energy loss.

[0049] In one embodiment of the present application, Figures 2 to 5 As shown, the outlet pipe 21 of the present application may include a first pipe section 211, a connecting ring 212 and a second pipe section 213 which are coaxially arranged. The radial dimension of the first pipe section 211 is smaller than the radial dimension of the second pipe section 213. One end of the first pipe section 211 is used to connect with the water distribution pipe 22, and the other end of the first pipe section 211 is connected to one side of the connecting ring 212. The second pipe section 213 is connected to the side of the connecting ring 212 away from the first pipe section 211. The outer peripheral surface of the connecting ring 212 is inwardly recessed to form a plurality of threaded blind holes 2121 uniformly distributed along the circumference of the connecting ring 212; The processing device 100 for the inner surface weld of the channel also includes a wrapping sleeve 3, a sealing ring 4 and a mounting bolt 5. The wrapping sleeve 3 includes a coaxially connected top ring 31 and a sleeve section 32. The top ring 31 is sleeved on the outside of the water inlet pipe 11. The end of the sleeve section 32 away from the top ring 31 is formed with a mounting through hole 321 which is arranged one-to-one with the threaded blind hole 2121. The mounting bolt 5 is passed through the mounting through hole 321 and is threadedly connected to the threaded blind hole 2121; the sealing ring 4 is interference fitted in the cavity enclosed by the top ring 31, the second pipe section 213, the connecting ring 212 and the water inlet pipe 11.

[0050] In this way, the outlet pipe 21, wrapping sleeve 3, sealing ring 4 and mounting bolts 5 arranged in this way can ensure that the outlet pipe 21 can rotate relative to the inlet pipe 11 on the basis of achieving reliable sealing at the joint between the inlet pipe 11 and the outlet pipe 21.

[0051] In one embodiment of the present application, Figures 3 to 6 As shown, the water inlet assembly 1 of the present application may further include a convex ring 12 sleeved outside the water inlet pipe 11 ; the inner surface of the sealing ring 4 is recessed inward to form a notch 41 that matches the convex ring 12 .

[0052] In this way, through the convex ring 12 and the sealing ring 4 arranged in this way, not only can the seepage path of the cavitation water jet be effectively extended, and the sealing performance at the joint between the water outlet pipe 21 and the water inlet pipe 11 be further improved, but also the circumferential installation stability and interference fit state stability of the sealing ring 4 can be achieved, which can also further help to improve the sealing performance at the joint between the water outlet pipe 21 and the water inlet pipe 11.

[0053] In one embodiment of the present application, the number of the threaded blind holes 2121 of the present application can be set to 2 to 6. It can be understood that the number of the threaded blind holes 2121 of the present application should not be too many or too small. When the number of the threaded blind holes 2121 is set to two, it can reduce the processing difficulty and the influence on the structural strength of the outlet pipe 21 caused by the opening, and also ensure the connection stability between the wrapping sleeve 3 and the outlet pipe 21. When the number of the threaded blind holes 2121 is set to six, it can maximize the connection stability between the wrapping sleeve 3 and the outlet pipe 21, and can also reduce the processing difficulty and the influence on the structural strength of the outlet pipe 21 caused by the opening to a certain extent.

[0054] In one embodiment of the present application, Figure 1 , Figure 2 and Figure 4 As shown, the processing device 100 for the inner surface weld of the pipeline of the present application can also include a driving member 6 and a conducting block 7, the output end of the driving member 6 is connected to the conducting block 7 to drive the conducting block 7 to move axially along the water inlet pipe 11; the conducting block 7 is connected to the water inlet pipe 11, and a accommodating cavity 71 is formed in the conducting block 7 and is interconnected with the water inlet pipe 11, and the other end of the accommodating cavity 71 is used to communicate with an external pressurized water source.

[0055] In this way, the conducting block 7 can serve as a direct acting structure of the driving member 6, which can not only ensure the reliable connection between the external pressurized water source and the water inlet pipe 11, but also effectively ensure the working range of the processing device 100 for the inner surface weld of the pipeline of the present application.

[0056] In one embodiment of the present application, Figure 1 and Figure 2 As shown, the processing device 100 for the inner surface weld of the pipeline of the present application can also include a connecting hose 8. The top surface of the conducting block 7 is recessed inward to form a mounting hole 72 that is interconnected with the accommodating cavity 71. One end of the connecting hose 8 is installed in the mounting hole 72, and the other end of the connecting hose 8 is used to connect with an external pressurized water source.

[0057] In this way, when facing various complex and narrow working environment, the connecting hose 8 arranged in this way can effectively ensure the stability and reliability of water supply, and further improve the environmental applicability of the processing device 100 for the inner surface weld of the pipeline of this application.

[0058] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for processing welds on the inner surface of a pipeline, characterized in that: include: A water inlet assembly (1) comprises a water inlet pipe (11), one end of the water inlet pipe (11) being used for communicating with an external pressurized water source; A water outlet assembly (2), comprising a water outlet pipe (21) and at least two water branch pipes (22), and nozzles (23) corresponding to the water branch pipes (22), one end of the water outlet pipe (21) being rotatably sleeved outside the water inlet pipe (11), at least three of the water branch pipes (22) being evenly distributed along the circumference of the water outlet pipe (21) at one end of the water outlet pipe (21) away from the water inlet pipe (11), the water branch pipes (22) being communicated with the water outlet pipe (21), and the nozzles (23) being installed at one end of the water branch pipe (22) away from the water outlet pipe (21); There is an angle between the spraying direction of the nozzle (23) and the axial direction of the water distribution pipe (22), and the spraying direction of the nozzle (23) is located in a plane where the axial directions of at least three water distribution pipes (22) are located.

2. The device for processing the inner surface weld of a pipeline according to claim 1, characterized in that: The included angle β between the spraying direction of the nozzle (23) and the axial direction of the water distribution pipe (22) satisfies: 0°<β≤2°.

3. The device for processing the weld seam on the inner surface of a pipeline according to claim 1, characterized in that: The inner diameter of the water inlet pipe (11) is the same as the inner diameter of the water outlet pipe (21).

4. The device for processing the inner surface weld of a pipeline according to claim 1, characterized in that: The water outlet pipe (21) comprises a first pipe section (211), a connecting ring (212) and a second pipe section (213) which are coaxially arranged; the radial dimension of the first pipe section (211) is smaller than the radial dimension of the second pipe section (213); one end of the first pipe section (211) is used to be connected to the water distribution pipe (22); the other end of the first pipe section (211) is connected to one side of the connecting ring (212); the second pipe section (213) is connected to a side of the connecting ring (212) away from the first pipe section (211); the outer circumferential surface of the connecting ring (212) is inwardly recessed to form a plurality of threaded blind holes (2121) uniformly distributed along the circumference of the connecting ring (212); The device for processing the weld on the inner surface of a pipeline further comprises a wrapping sleeve (3), a sealing ring (4) and a mounting bolt (5); the wrapping sleeve (3) comprises a coaxially connected top ring (31) and a sleeve section (32); the top ring (31) is sleeved outside the water inlet pipe (11); an end of the sleeve section (32) away from the top ring (31) is formed with a mounting through hole (321) arranged in a one-to-one correspondence with the threaded blind hole (2121); the mounting bolt (5) is passed through the mounting through hole (321) and is threadedly connected in the threaded blind hole (2121); the sealing ring (4) is interference-fitted in a cavity enclosed by the top ring (31), the second pipe section (213), the connecting ring (212) and the water inlet pipe (11).

5. The device for processing the inner surface weld of a pipeline according to claim 4, characterized in that: The water inlet assembly (1) further comprises a convex ring (12) sleeved outside the water inlet pipe (11); The inner surface of the sealing ring (4) is recessed inwardly to form a notch (41) that matches the convex ring (12).

6. The device for processing the weld seam on the inner surface of a pipeline according to claim 4, characterized in that: The number of the threaded blind holes (2121) is set to 2 to 6.

7. The device for processing the weld seam on the inner surface of a pipeline according to any one of claims 1 to 6, characterized in that: The device for processing the weld seam on the inner surface of a pipeline further comprises a driving member (6) and a conducting block (7), wherein an output end of the driving member (6) is connected to the conducting block (7) so as to drive the conducting block (7) to move along the axial direction of the water inlet pipe (11); The conduction block (7) is connected to the water inlet pipe (11), and a receiving cavity (71) is formed in the conduction block (7) and is in communication with the water inlet pipe (11), and the other end of the receiving cavity (71) is used to communicate with an external pressurized water source.

8. The device for processing the weld seam on the inner surface of a pipeline according to claim 7, characterized in that: The device for processing the weld seam on the inner surface of a pipeline further comprises a connecting hose (8); the top surface of the conducting block (7) is inwardly recessed to form a mounting hole (72) that is interconnected with the accommodating cavity (71); one end of the connecting hose (8) is mounted in the mounting hole (72); and the other end of the connecting hose (8) is used to communicate with an external pressurized water source.

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