Negative pressure welding inspection device
By designing pre-exhaust components and negative pressure vacuum system in the weld detection device, the problem of poor effect of existing vacuum pumps in large-volume pipeline processing is solved, and the accuracy of weld detection is improved.
Patent Information
- Application Number
- CN202421598172.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-07-05
AI Technical Summary
Existing vacuum pumps are difficult to effectively vacuum when handling large-volume pipelines, which affects the accuracy of weld detection.
A negative pressure welding inspection device is designed to pre-vacuate the pipe through a pre-vacuum assembly, and the inside of the pipe is vacuumed using the first vacuum pump and the connecting pipe, and to detect whether there is a leakage point in the weld joint with helium jet.
It improves the accuracy of weld detection, reduces the adverse impact on detection accuracy, and can effectively deal with large-volume pipelines.
Smart Images
Figure CN222704290U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of weld detection, and in particular to a negative pressure welding inspection device. Background Art
[0002] After the pipeline welding is completed, the weld of the pipeline needs to be inspected to detect whether there are leaks in the weld. The common detection method is to continuously evacuate the inside of the pipeline through a vacuum pump, and the pressure gauge will display the value of the pipeline vacuum. The helium spray gun is placed close to the weld and moved along the weld. When there is a leak in the pipeline weld, helium enters the pipeline through the leak. At this time, the value on the pressure gauge changes accordingly, and the pipeline welding is unqualified.
[0003] Common vacuum pumps usually have certain limitations on the volume inside the pipe to be evacuated. When the volume inside the pipe to be evacuated exceeds the range of the vacuum pump's evacuation capacity, it is difficult for the vacuum pump to evacuate it, and it is difficult to detect whether there are leaks in the weld, affecting the accuracy of pipeline weld detection. Utility Model Content
[0004] In order to reduce the adverse effects on detection accuracy, the present application provides a negative pressure welding inspection device.
[0005] The negative pressure welding inspection device provided in this application adopts the following technical solution:
[0006] A negative pressure welding inspection device comprises a workbench and a detection tube fixedly connected to one end of the upper side of the workbench, a first vacuum pump is installed at the lower end of the detection tube, and a first pressure gauge is installed on the detection tube, a connecting tube connected to the inside of a pipeline is provided at the upper end of the detection tube, a first valve is installed on the connecting tube, and a pre-evacuation component connected to the pipeline is provided at one end of the workbench away from the detection tube.
[0007] By adopting the above technical solution, when detecting the pipeline weld, the pipeline is installed on the pre-evacuation component, and the pipeline is pre-evacuated by the pre-evacuation component. At this time, the first valve is closed. When the air in the pipeline is compatible with the working range of the first vacuum pump, the pre-evacuation component is closed and the first valve is opened. At this time, the inside of the pipeline is evacuated by the first vacuum pump and the connecting pipe, and the first pressure gauge displays a value, so that it is convenient to detect the pipeline weld by spraying helium at the weld with a spray gun, and it is judged whether there is a leak in the pipeline weld by the value change of the first pressure gauge, thereby reducing the adverse effect on the detection accuracy.
[0008] Optionally, the pre-evacuation assembly includes a pre-evacuation tube fixedly connected to the workbench, one end of the tube is inserted into the upper end of the pre-evacuation tube, and a second vacuum pump is installed at the lower end of the pre-evacuation tube, a second pressure gauge connected to the interior of the pre-evacuation tube is installed on one side of the pre-evacuation tube, one end of the tube away from the pre-evacuation tube is covered with a sealing plate, and a second valve is installed on the pre-evacuation tube.
[0009] By adopting the above technical solution, the lower end of the pipeline is inserted into the pre-pumping pipe, the sealing plate blocks the upper end of the pipeline, and the connecting pipe connects the pipeline and the detection tube. The first valve closes the connecting pipe. At this time, the second vacuum pump pre-vacuums the pipeline through the pre-pumping pipe. At this time, the second pressure gauge displays a value. When the air in the pipeline is compatible with the working range of the first vacuum pump, the second valve is closed and the first valve is opened. The first vacuum pump continues to vacuum the inside of the pipeline, thereby facilitating the detection of the pipeline weld and reducing the adverse effects on the detection accuracy.
[0010] Optionally, a mounting portion communicating with the interior of the pipeline is fixedly connected to one side of the pipeline, and an end of the connecting pipe away from the detection pipe is inserted into the mounting portion.
[0011] By adopting the above technical solution, the pipeline is connected to the connecting pipe through the installation part, so that the connecting pipe is always in contact with the pipeline, which facilitates the pipeline to continue to be vacuumed through the connecting pipe in time after the second valve is closed, thereby reducing the adverse effect on the detection accuracy.
[0012] Optionally, the blocking plate is configured as a blocking plate made of rubber material.
[0013] By adopting the above technical solution, the sealing plate is set to rubber material, which is convenient for fitting to different pipe ends and sealing the pipe ends, reducing the possibility of air entering the pipe from the gap between the sealing plate and the pipe end, thereby reducing the adverse effect on detection accuracy.
[0014] Optionally, a support frame located on one side of the pipeline is provided on the upper end of the workbench close to the pre-extraction tube, and a clamping frame facing the pipeline is fixedly connected to the upper end of the support frame. Clamping plates facing the pipeline are provided on both sides of the clamping frame that are relatively arranged, and the clamping plates are relatively arranged on both sides of the pipeline, and a driving member for driving the clamping plates to clamp the pipeline is provided on the clamping frame.
[0015] By adopting the above technical solution, one end of the pipeline is inserted into the pre-extraction tube. At this time, the pipeline is located in the clamping frame, and the clamping plates are driven by the driving member to move in the direction of approaching each other until they abut against the side wall of the pipeline, thereby facilitating the support of the side wall of the pipeline, maintaining the stability of the connection between the pipeline and the pre-extraction tube, and reducing the adverse effects on the detection accuracy.
[0016] Optionally, the driving member includes a first hydraulic cylinder corresponding to the clamping plate and fixedly connected to a side of the clamping plate that is away from each other, and one end of the first hydraulic cylinder that is away from each other is fixed to the clamping frame.
[0017] By adopting the above technical solution, the first hydraulic cylinder drives the corresponding clamping plates to move towards each other until the clamping plates are attached to the pipeline, thereby facilitating the support of the pipeline and improving the stability of the connection between the pipeline and the pre-extraction pipe.
[0018] Optionally, a sliding frame facing the pre-extraction tube is fixedly connected to the workbench, the lower end of the support frame is inserted into the sliding frame and slidably connected to the sliding frame, and a moving component for driving the support frame to move is provided in the sliding frame.
[0019] By adopting the above technical solution, when supporting pipes of different diameters, the supporting frame is driven by the moving assembly to move toward or away from the pre-extraction pipe, so that the pipe to be inspected is always located in the middle of the length direction of the clamping frame, which is convenient for clamping and fixing the pipe to be inspected and improving the stability of the connection between the pipe and the pre-extraction pipe.
[0020] Optionally, the moving component includes a moving frame located in the sliding frame and slidably connected to the sliding frame, the lower end of the support frame is inserted into the moving frame, and one side of the moving frame is rotatably connected to a first screw, and one end of the first screw away from the moving frame passes through the side wall of the sliding frame and is threadedly connected to the sliding frame.
[0021] By adopting the above technical solution, the first screw is rotated, and the first screw drives the movable frame and the support frame to move along the length direction of the sliding frame, so as to facilitate the adjustment of the position of the support frame in the length direction of the sliding frame, so that the pipeline to be inspected is always located in the middle of the length direction of the clamping frame, which is convenient for clamping and fixing the pipeline to be inspected and improving the stability of the connection between the pipeline and the pre-extraction tube.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. When testing the pipeline weld, install the pipeline on the pre-evacuation assembly, pre-evacuate the pipeline through the pre-evacuation assembly, and at this time, the first valve is closed. When the air in the pipeline is adapted to the working range of the first vacuum pump, close the pre-evacuation assembly and open the first valve. At this time, the inside of the pipeline is evacuated through the first vacuum pump and the connecting pipe, and the first pressure gauge displays a value, so that it is convenient to detect the pipeline weld by spraying helium to the weld with a spray gun, and judge whether there is a leak in the pipeline weld by the value change of the first pressure gauge, thereby reducing the adverse effect on the detection accuracy;
[0024] 2. The plugging plate is made of rubber material, which is convenient for fitting to different pipe ends and sealing the pipe ends, reducing the possibility of air entering the pipe from the gap between the plugging plate and the pipe end, and reducing the adverse effect on the detection accuracy;
[0025] 3. Insert one end of the pipe into the pre-extraction pipe. At this time, the pipe is located in the clamping frame. The driving member drives the clamping plates to move towards each other until they abut against the side wall of the pipe, thereby facilitating the support of the side wall of the pipe, maintaining the stability of the connection between the pipe and the pre-extraction pipe, and reducing the adverse effects on the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the overall structure of the negative pressure welding inspection device in Example 1 of the present application.
[0027] Figure 2 It is a structural schematic diagram showing the positional relationship between the support frame and the pipeline in Example 2 of the present application.
[0028] Figure 3 It is a structural schematic diagram showing the positional relationship between the base plate and the plug-in board in Example 2 of the present application.
[0029] Explanation of the accompanying drawings: 1. workbench; 2. pipeline; 21. installation part; 3. detection tube; 31. first vacuum pump; 32. first pressure gauge; 33. connecting pipe; 34. first valve; 4. pre-pumping assembly; 41. pre-pumping pipe; 42. sealing plate; 43. second vacuum pump; 44. second pressure gauge; 45. second valve; 5. support frame; 51. bottom plate; 511. plug-in plate; 512. plug-in slot; 52. second hydraulic cylinder; 6. clamping frame; 61. clamping plate; 62. first hydraulic cylinder; 7. sliding frame; 71. sliding slot; 8. moving assembly; 81. moving frame; 82. first lead screw; 9. sliding member; 91. second lead screw; 92. first bevel gear; 93. second bevel gear; 94. driving rod. DETAILED DESCRIPTION
[0030] The present application is further described in detail below in conjunction with the accompanying drawings.
[0031] The embodiment of the present application discloses a negative pressure welding inspection device.
[0032] Example 1
[0033] Reference Figure 1 A negative pressure welding inspection device includes a workbench 1 and a pipeline 2 arranged in a vertical direction on the upper side of the workbench 1, a vertical detection tube 3 is fixedly connected to one end of the upper side of the workbench 1 away from the pipeline 2, the lower end of the detection tube 3 passes through the upper side of the workbench 1 and is installed with a first vacuum pump 31, and the side of the detection tube 3 away from the pipeline 2 is connected to a first pressure gauge 32 installed on the upper side of the workbench 1.
[0034] One side of the pipeline 2 is fixedly connected and communicated with a horizontal mounting portion 21, and a connecting pipe 33 is plugged into the upper end of the detection tube 3. The connecting pipe 33 is set as a hose, and the end of the connecting pipe 33 away from the detection tube 3 is plugged into the end of the mounting portion 21 and communicated with the mounting portion 21. A first valve 34 is installed at the end of the connecting pipe 33 close to the detection tube 3, and a pre-pumping component 4 located below the pipeline 2 and pre-pumping the pipeline 2 is provided on the upper side of the workbench 1.
[0035] When inspecting the 3-way weld of pipe 2, install pipe 2 on the pre-evacuation assembly 4, and connect pipe 33 and inspection pipe 3 through the installation part 21 and the connecting pipe 33, pre-evacuate pipe 2 through the pre-evacuation assembly 4, at this time, the first valve 34 is closed, when the air in pipe 2 is adapted to the working range of the first vacuum pump 31, close the pre-evacuation assembly 4 and open the first valve 34, evacuate the inside of pipe 2 through the first vacuum pump 31 and the connecting pipe 33, and the first pressure gauge 32 displays a value, so as to facilitate the inspection of the 3-way weld of pipe 2 by spraying helium at the weld with a spray gun, and judge whether there is a leak in the weld of pipe 2 by the value change of the first pressure gauge 32.
[0036] Reference Figure 1 The pre-extraction assembly 4 includes a pre-extraction pipe 41 located below the pipeline 2. The pre-extraction pipe 41 is vertically arranged in a cross shape. The lower end of the pipeline 2 is inserted into the upper end of the pre-extraction pipe 41. The upper end of the pipeline 2 is covered with a horizontal rubber sealing plate 42. The pre-extraction pipe 41 is fixedly connected to the upper side of the workbench 1, and the lower end of the pre-extraction pipe 41 passes through the upper side of the workbench 1 and is installed with a second vacuum pump 43. A second pressure gauge 44 connected to the inside of the pre-extraction pipe 41 is installed on the side of the pre-extraction pipe 41 close to the detection tube 3, and a second valve 45 is installed on the pre-extraction pipe 41.
[0037] The lower end of the pipeline 2 is inserted into the pre-evacuation pipe 41, the sealing plate 42 seals the upper end of the pipeline 2, the connecting pipe 33 connects the pipeline 2 and the detection tube 3, and the first valve 34 closes the connecting pipe 33. At this time, the second vacuum pump 43 pre-evacuates the pipeline 2 through the pre-evacuation pipe 41, and the second pressure gauge 44 displays a value. When the air in the pipeline 2 is adapted to the working range of the first vacuum pump 31, the second valve 45 is closed and the first valve 34 is opened, and the first vacuum pump 31 continues to evacuate the inside of the pipeline 2 to facilitate the detection of the weld of the pipeline 2.
[0038] The sealing plate 42 is made of rubber material, so as to fit the ends of different pipes 2 and seal the ends of the pipes 2 .
[0039] The implementation principle of Example 1 is as follows: the lower end of the pipeline 2 is inserted into the pre-evacuation tube 41, the sealing plate 42 blocks the upper end of the pipeline 2, the connecting tube 33 connects the pipeline 2 and the detection tube 3, and the first valve 34 closes the connecting tube 33. At this time, the second vacuum pump 43 pre-vacuums the pipeline 2 through the pre-evacuation tube 41, and the second pressure gauge 44 displays a value. When the air in the pipeline 2 is adapted to the working range of the first vacuum pump 31, the second valve 45 is closed and the first valve 34 is opened, and the first vacuum pump 31 continues to vacuum the inside of the pipeline 2, so as to facilitate the detection of the weld of the pipeline 2.
[0040] Example 2
[0041] Reference Figure 2 and Figure 3 The difference between this embodiment and embodiment 1 is that a vertical support frame 5 located on one side of the pre-pumping tube 41 is provided at one end of the upper side of the workbench 1 close to the pre-pumping tube 41, and the support frame 5 includes a horizontal bottom plate 51 and a vertical second hydraulic cylinder 52 fixedly connected to the middle part of the upper side of the bottom plate 51, and the telescopic rod of the second hydraulic cylinder 52 faces upward and is fixedly connected to a horizontal clamping frame 6, and the opening of the clamping frame 6 faces the side away from the second hydraulic cylinder 52.
[0042] The two opposite sides of the clamping frame 6 are provided with clamping plates 61 located in the clamping frame 6. The clamping plates 61 are arranged opposite to each other, and a driving member for driving the clamping plates 61 to move in a direction close to each other is provided on the clamping frame 6. In the embodiment of the present application, the driving member is configured as a first hydraulic cylinder 62 adapted to the clamping plate 61 and located on a side of the clamping plate 61 away from each other. The first hydraulic cylinder 62 is fixedly connected to the clamping frame 6, and a telescopic rod of the first hydraulic cylinder 62 passes through the side wall of the clamping frame 6 and is fixedly connected to the middle of the corresponding clamping plate 61.
[0043] Insert one end of the pipe 2 into the pre-extraction pipe 41. At this time, the pipe 2 is located in the clamping frame 6. The first hydraulic cylinder 62 drives the corresponding clamping plate 61 to move towards each other until the clamping plate 61 is attached to the pipe 2. The second hydraulic cylinder 52 adjusts the clamping position of the clamping plate 61 to keep the center of gravity of the pipe 2 stable, thereby maintaining the stability of the connection between the pipe 2 and the pre-extraction pipe 41.
[0044] Reference Figure 2 and Figure 3A sliding frame 7 parallel to the length direction of the working table 1 is fixedly connected to the working table 1, and the bottom plate 51 is plugged into the sliding frame 7. A horizontal plug-in board 511 is provided on one side of the bottom plate 51, and a plug-in slot 512 is provided on the side of the bottom plate 51 close to the plug-in board 511. One side of the plug-in board 511 is inserted into the plug-in slot 512 and is slidably connected to the bottom plate 51. A sliding slot 71 is provided along the length direction of the sliding frame 7 and adapted to the plug-in board 511 on one side of the interior of the sliding frame 7. One end of the plug-in board 511 away from the plug-in slot 512 is inserted into the sliding slot 71 and is slidably connected to the sliding frame 7. A moving component 8 for driving the bottom plate 51 to move is provided in the sliding frame 7.
[0045] The plug-in board 511 can completely enter the plug-in slot 512, and a sliding member 9 for driving the plug-in board 511 to move is provided in the bottom plate 51. The moving member includes a second lead screw 91 located in the bottom plate 51 and rotatably connected to the bottom plate 51, one end of the second lead screw 91 is inserted into the plug-in board 511 and is threadedly connected to the plug-in board 511. The end of the second lead screw 91 is sleeved and fixedly connected with a first bevel gear 92, one side of the first bevel gear 92 is meshed with a second bevel gear 93 inserted in the bottom plate 51 and rotatably connected to the bottom plate 51, and a vertical driving rod 94 is inserted and fixedly connected at the axis of the second bevel gear 93, and the upper end of the driving rod 94 passes through the bottom plate 51 and is rotatably connected to the bottom plate 51.
[0046] Reference Figure 3 The moving assembly 8 includes a moving frame 81 inserted into the sliding frame 7. The moving frame 81 opens toward the side of the bottom plate 51 close to the plug-in board 511. One end of the outer side of the moving frame 81 is rotatably connected to a horizontal first lead screw 82. One end of the first lead screw 82 away from the moving frame 81 passes through the sliding frame 7 and is threadedly connected to the sliding frame 7.
[0047] When supporting pipes 2 of different diameters, rotate the first screw 82. At this time, the first screw 82 drives the movable frame 81 and the support frame 5 to move along the length direction of the sliding frame 7. The plug-in plate 511 is inserted into the sliding groove 71 and moves, so as to facilitate the adjustment of the position of the support frame 5 in the length direction of the sliding frame 7, so that the pipe 2 to be inspected is always located in the middle of the length direction of the clamping frame 6, which is convenient for clamping and fixing the pipe 3 to be inspected.
[0048] And rotating the driving rod 94 can drive the second lead screw 91 to rotate through the first bevel gear 92 and the second bevel gear 93, thereby driving the plug-in board 511 to insert into or disengage from the sliding groove 71, which is convenient for installing and disassembling the support frame 5 and improving work efficiency.
[0049] The implementation principle of Example 2 is: when supporting different pipes 2, one end of the pipe 2 is inserted into the pre-extraction pipe 41. At this time, the pipe 2 is located in the clamping frame 6, and the first hydraulic cylinder 62 drives the corresponding clamping plate 61 to move in the direction of approaching each other until the clamping plate 61 is attached to the pipe 2, and the second hydraulic cylinder 52 adjusts the clamping position of the clamping plate 61 to keep the center of gravity of the pipe 2 stable, thereby maintaining the stability of the connection between the pipe 2 and the pre-extraction pipe 41.
[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A negative pressure welding inspection device, characterized in that: The invention comprises a workbench (1) and a detection tube (3) fixedly connected to one end of the upper side of the workbench (1); a first vacuum pump (31) is installed at the lower end of the detection tube (3); a first pressure gauge (32) is installed on the detection tube (3); a connecting tube (33) communicating with the inside of a pipeline (2) is provided at the upper end of the detection tube (3); a first valve (34) is installed on the connecting tube (33); and a pre-pumping assembly (4) communicating with the pipeline (2) is provided at one end of the workbench (1) away from the detection tube (3).
2. A negative pressure welding inspection device according to claim 1, characterized in that: The pre-extraction assembly (4) comprises a pre-extraction pipe (41) fixedly connected to the workbench (1), one end of the pipeline (2) is inserted into the upper end of the pre-extraction pipe (41), and a second vacuum pump (43) is installed at the lower end of the pre-extraction pipe (41), a second pressure gauge (44) connected to the interior of the pre-extraction pipe (41) is installed on one side of the pre-extraction pipe (41), one end of the pipeline (2) away from the pre-extraction pipe (41) is covered with a sealing plate (42), and a second valve (45) is installed on the pre-extraction pipe (41).
3. A negative pressure welding inspection device according to claim 2, characterized in that: A mounting portion (21) communicating with the interior of the pipeline (2) is fixedly connected to one side of the pipeline (2), and an end of the connecting pipe (33) away from the detection pipe (3) is inserted into the mounting portion (21).
4. A negative pressure welding inspection device according to claim 3, characterized in that: The blocking plate (42) is configured as a blocking plate (42) made of rubber material.
5. A negative pressure welding inspection device according to claim 3, characterized in that: A support frame (5) located on one side of the pipeline (2) is provided at one end of the upper side of the workbench (1) close to the pre-extraction pipe (41); a clamping frame (6) facing the pipeline (2) is fixedly connected to the upper end of the support frame (5); clamping plates (61) facing the pipeline (2) are provided on two opposite sides of the clamping frame (6); the clamping plates (61) are arranged on two opposite sides of the pipeline (2); and a driving member for driving the clamping plates (61) to clamp the pipeline (2) is provided on the clamping frame (6).
6. A negative pressure welding inspection device according to claim 5, characterized in that: The driving member comprises a first hydraulic cylinder (62) corresponding to the clamping plate (61) and fixedly connected to a side of the clamping plate (61) that is away from each other, and an end of the first hydraulic cylinder (62) that is away from each other is fixed to the clamping frame (6).
7. A negative pressure welding inspection device according to claim 6, characterized in that: A sliding frame (7) facing the pre-extraction tube (41) is fixedly connected to the workbench (1); the lower end of the support frame (5) is inserted into the sliding frame (7) and is slidably connected to the sliding frame (7); and a moving component (8) for driving the support frame (5) to move is provided in the sliding frame (7).
8. A negative pressure welding inspection device according to claim 7, characterized in that: The moving assembly (8) comprises a moving frame (81) located in the sliding frame (7) and slidably connected to the sliding frame (7); the lower end of the support frame (5) is inserted into the moving frame (81); one side of the moving frame (81) is rotatably connected to a first lead screw (82); an end of the first lead screw (82) away from the moving frame (81) passes through a side wall of the sliding frame (7) and is threadedly connected to the sliding frame (7).