Air tightness detection mechanism for pipe fitting welding ring and welding system

Abstract

The utility model discloses an air tightness detection mechanism for a pipe fitting welding ring and a welding system, relates to the technical field of welding equipment, and can solve the problem that the air tightness of the welding ring of a pipe fitting cannot be quickly detected after the automatic welding of the pipe fitting is completed at present. The air tightness detection mechanism of the pipe fitting welding ring comprises a horizontally arranged workbench, and further comprises a driving cylinder and an inflator pump which are arranged on the workbench, and a detection structure which is provided with a detection cavity groove and is used for being buckled at the welding position of a pipe fitting main body, the detection structure is arranged at the output end of the driving cylinder, and the air outlet end of the inflator pump is communicated with a detection cavity groove of the detection structure; the air pressure detection device is used for monitoring the air pressure in the detection cavity groove; and the signal input end of the air pressure detection device is communicated with the detection cavity groove of the detection structure.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding technology, specifically to a mechanism and welding system for testing the airtightness of welded rings of pipe fittings. Background Technology

[0002] Currently, when welding pipe fittings, the fittings are usually placed horizontally and fixed in place. The welder works from the bottom and sides of the fitting upwards until the top of the fitting is fully welded. However, manual welding relies on the welder's experience, and the welding quality is not stable or controllable.

[0003] A search revealed that Chinese patent CN116690094A, entitled "A Pipe Welding Machine," discloses a technical solution. The concept involves first removing rust from the weld joint of the pipe fittings, then using a welding structure to directly weld the two pipe fittings together. The welding principle is to keep the welding point fixed and drive both pipe fittings to rotate simultaneously to weld the pipe joint. While this achieves automatic pipe welding and solves the problem of manual welding, the automatic welding results in low weld quality. After welding, the airtightness of the welded area needs to be tested, but currently there is no mechanism that can quickly test the airtightness of the welded area after automatic welding.

[0004] Therefore, it is necessary to design an airtightness testing mechanism and welding system for pipe fitting weld rings to solve the above problems, hence this application. Summary of the Invention

[0005] The purpose of this application is to provide an airtightness testing mechanism and welding system for pipe fitting weld rings, in order to solve the problem that the airtightness of the weld rings cannot be quickly tested after automatic welding of pipe fittings.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0007] On the one hand, this application provides an airtightness testing mechanism for pipe fitting weld rings, including a horizontally arranged worktable, a drive cylinder and an air pump disposed on the worktable, and a testing structure having a detection cavity groove for fastening at the welding position of the pipe fitting body.

[0008] The detection structure is located on the output end of the drive cylinder, and the air outlet of the air pump is connected to the detection cavity groove of the detection structure.

[0009] It also includes a pneumatic pressure detection device for monitoring the air pressure in the detection cavity groove, and the signal input terminal of the pneumatic pressure detection device is connected to the detection cavity groove of the detection structure.

[0010] Optionally, the detection structure is provided with an air inlet and an air outlet;

[0011] It also includes a first shut-off valve located at the air outlet, an air pressure detection device located between the air outlet and the first shut-off valve, and the air outlet of the air pump connected to the air inlet.

[0012] Optionally, a second shut-off valve is also provided between the air outlet and the air inlet of the air pump.

[0013] Optionally, the longitudinal section of the detection structure is fan-shaped, and the central angle of the arc corresponding to the fan-shaped ring is in the range of 60° to 120°.

[0014] The detection structure has a concave side that fits against the outer peripheral wall of the pipe body.

[0015] Optionally, the concave side of the detection structure is also provided with an elastic pad for shock absorption and buffering.

[0016] Optionally, the central angle ranges from 90° to 100°.

[0017] Optionally, the detection structure is further provided with cooling chamber grooves located on both sides of the detection chamber groove, and the bottom of the two cooling chamber grooves is provided with a coolant inlet and a coolant outlet;

[0018] It also includes a pumping device for delivering coolant into the grooves of the cooling chamber.

[0019] Optionally, the coolant is water, and the pumping device is a water pump.

[0020] Another aspect of this application provides a welding system including an airtightness testing mechanism for a pipe fitting weld ring as described above, the welding system further including two pipe clamping mechanisms for clamping the pipe fitting body, and a pipe fitting rotation drive for driving the two pipe clamping mechanisms to rotate synchronously.

[0021] The airtightness testing mechanism is located in the middle between the two clamping mechanisms.

[0022] The beneficial effects of this utility model are:

[0023] The concept for solving the technical problem in this application is as follows: by setting up a detection structure, a drive cylinder and an air pump, and an air pressure detection device, the drive cylinder drives the detection cavity groove of the detection structure to approach and engage with the welding position of the pipe body. Then, the air pump supplies gas into the detection cavity groove. By measuring the air pressure change of the air pressure detection device, it can be determined whether there is an airtightness problem at the welding position of the pipe body where the detection cavity groove engages. After rotating the pipe body multiple times, the airtightness problem of the entire weld ring of the pipe body can be detected. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the structure of Embodiment 1 of this application.

[0025] Figure 2 This is a top view of the detection structure in Embodiment 1 of this application.

[0026] Figure 3 This is a top view of the detection structure in Embodiment 2 of this application.

[0027] Figure 4 This is a top view of the structure of Embodiment 3 of this application.

[0028] Explanation of reference numerals in the attached drawings: 1-Workbench, 2-Pipe body, 3-Drive cylinder, 4-Detection structure, 41-Detection chamber groove, 411-Air inlet, 412-Air outlet, 42-Cooling chamber groove, 421-Coolant inlet, 422-Coolant outlet, 43-Elastic pad, 51-First shut-off valve, 52-Second shut-off valve, 6-Air pressure detection device, 7-Air pump, 8-Pipe clamping mechanism, 9-Pipe rotation drive. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides an airtightness testing mechanism for pipe fitting weld rings, including a horizontally arranged workbench 1, a drive cylinder 3 and an air pump 7 disposed on the workbench 1, and a testing structure 4 having a detection cavity groove 41 for fastening at the welding position of the pipe fitting body 2.

[0034] The detection structure 4 is located on the output end of the drive cylinder 3, and the air outlet of the air pump 7 is connected to the detection cavity groove 41 of the detection structure 4.

[0035] It also includes a pneumatic pressure detection device 6 for monitoring the pneumatic pressure in the detection cavity groove 41, and the signal input terminal of the pneumatic pressure detection device 6 is connected to the detection cavity groove 41 of the detection structure 4.

[0036] This embodiment uses a detection structure 4, a driving cylinder 3, an air pump 7, and a pressure detection device 6. The driving cylinder 3 drives the detection cavity groove 41 of the detection structure 4 to approach and engage with the welding position of the pipe body 2. The air pump 7 then supplies gas into the detection cavity groove 41. The pressure change of the pressure detection device 6 can be used to determine whether there is an airtightness problem at the welding position of the pipe body 2 where the detection cavity groove 41 engages. After rotating the pipe multiple times, the airtightness of the entire weld ring of the pipe body 2 can be detected.

[0037] Specifically, in this embodiment, the detection structure 4 is provided with an air inlet 411 and an air outlet 412;

[0038] It also includes a first shut-off valve 51 located at the air outlet 412, a pressure detection device 6 located between the air outlet 412 and the first shut-off valve 51, and the air outlet of the air pump 7 connected to the air inlet 411. By setting the first shut-off valve 51, the first shut-off valve 51 can be closed during the air pump 7 inflation process to quickly increase the air pressure in the detection chamber groove 41, and the first shut-off valve 51 can be opened to quickly release the gas after the detection is completed.

[0039] Specifically, in this embodiment, a second shut-off valve 52 is provided between the air outlet and the air inlet 411 of the air pump 7. The second shut-off valve 52 allows the air pump 7 to maintain a certain pressure for a period of time after being inflated to a certain pressure, and the pressure change of the air pressure detection device 6 is used to determine whether there is an airtightness problem at the detected welding position.

[0040] Specifically, in this embodiment, the longitudinal section shape of the detection structure 4 is a fan-shaped ring, and the central angle of the arc corresponding to the fan-shaped ring is in the range of 60° to 120°.

[0041] The detection structure 4 has a concave side that fits against the outer peripheral wall of the pipe body 2. In this embodiment, the central angle range corresponding to the arc where the fan-shaped ring is located is 60° to 120°, so that the detection of the weld ring at the entire welding position can be completed after several detections.

[0042] Specifically, in this embodiment, the concave side of the detection structure 4 is also provided with an elastic pad 43 for shock absorption and buffering. The elastic pad 43 ensures the airtightness between the detection structure 4 and the outer wall of the pipe body 2 after the drive cylinder 3 presses the detection structure 4 onto the pipe body 2.

[0043] Specifically, in this embodiment, the central angle ranges from 90° to 100°. In this embodiment, the central angle is approximately 98°, and the central angle corresponding to the detection cavity groove 41 of the detection structure 4 is approximately 92° to 95°. The detection structure 4 can complete the detection of the weld ring at the entire welding position by performing four detections.

[0044] Example 2:

[0045] Based on the above embodiment 1, as follows Figure 3 As shown, the detection structure 4 is also provided with cooling chamber grooves 42 located on both sides of the detection chamber groove 41. The bottom of the two cooling chamber grooves 42 is provided with a coolant inlet 421 and a coolant outlet 422.

[0046] It also includes a pump device (not shown in the figure) for supplying coolant into the cooling chamber recess 42. By setting up the cooling chamber recess 42 and the pump device, the area near the welding position of the pipe body 2 can be cooled down between airtightness tests, thereby conducting away the high temperature caused by welding of the pipe body 2, allowing the welding position of the pipe body 2 to cool down quickly, improving the stability of subsequent airtightness tests, and also avoiding damage to the elastic pad 43 caused by high temperature.

[0047] Specifically, in this embodiment, the coolant is water, and the pumping device is a water pump.

[0048] The remaining structures in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0049] Example 3:

[0050] like Figure 4 As shown, based on the above embodiment 1 or embodiment 2, this embodiment provides a welding system including a pipe fitting welding ring air tightness testing mechanism as described above. The welding system further includes two pipe clamping mechanisms 8 for clamping the pipe fitting body 2, and a pipe fitting rotation drive 9 for driving the two pipe clamping mechanisms 8 to rotate synchronously.

[0051] The airtightness testing mechanism is located in the middle between the two pipe clamping mechanisms 8. In this embodiment, both the pipe clamping mechanism 8 and the pipe rotation drive 9 are existing technologies, and can be referred to the patent citations in the background art, which will not be repeated here. The remaining structures of this embodiment are the same as those of Embodiment 1 or Embodiment 2 above, and will not be repeated here.

[0052] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A mechanism for testing the airtightness of welded rings of pipe fittings, comprising a horizontally arranged workbench (1), characterized in that, It also includes a drive cylinder (3) and an air pump (7) mounted on the workbench (1), and a detection structure (4) with a detection cavity groove (41) for fastening at the welding position of the pipe body (2); The detection structure (4) is set on the output end of the drive cylinder (3), and the air outlet of the air pump (7) is connected to the detection cavity groove (41) of the detection structure (4); It also includes a pneumatic pressure detection device (6) for monitoring the air pressure in the detection cavity groove (41), and the signal input end of the pneumatic pressure detection device (6) is connected to the detection cavity groove (41) of the detection structure (4).

2. The airtightness testing mechanism for pipe fitting welded rings according to claim 1, characterized in that, The detection structure (4) is provided with an air inlet (411) and an air outlet (412); It also includes a first shut-off valve (51) located at the air outlet (412), a pressure detection device (6) located between the air outlet (412) and the first shut-off valve (51), and the air outlet of the air pump (7) connected to the air inlet (411).

3. The airtightness testing mechanism for pipe fitting welded rings according to claim 2, characterized in that, A second shut-off valve (52) is also provided between the air outlet end and the air inlet (411) of the air pump (7).

4. The airtightness testing mechanism for pipe fitting welded rings according to claim 1, characterized in that, The longitudinal section of the detection structure (4) is fan-shaped, and the central angle of the arc corresponding to the fan-shaped ring is between 60° and 120°. The detection structure (4) has a concave side that fits against the outer peripheral wall of the pipe body (2).

5. The airtightness testing mechanism for pipe fitting welded rings according to claim 4, characterized in that, The concave side of the detection structure (4) is also provided with an elastic pad (43) for shock absorption and buffering.

6. The airtightness testing mechanism for pipe fitting welded rings according to claim 4, characterized in that, The central angle ranges from 90° to 100°.

7. The airtightness testing mechanism for pipe fitting welded rings according to claim 4, characterized in that, The detection structure (4) is also provided with cooling chamber grooves (42) located on both sides of the detection chamber groove (41). The bottom of the two cooling chamber grooves (42) is provided with a coolant inlet (421) and a coolant outlet (422). It also includes a pumping device for delivering coolant into the cooling chamber recess (42).

8. The airtightness testing mechanism for pipe fitting welded rings according to claim 7, characterized in that, The coolant is water, and the pumping device is a water pump.

9. A welding system comprising an airtightness testing mechanism for a pipe fitting weld ring as described in any one of claims 1-8, characterized in that, The welding system also includes two clamping mechanisms (8) for clamping the pipe body (2) and a pipe rotation drive (9) for driving the two clamping mechanisms (8) to rotate synchronously; The airtightness testing mechanism is located in the middle between the two clamping mechanisms (8).

Images