Tool for welding pipeline flange plate

Abstract

The utility model provides a tool for welding a pipeline flange plate, and belongs to the technical field of tunnel face pipeline connection. The tool for welding the flange plate of the pipeline comprises a pre-fixing part and a supporting part, the pre-fixing part is used for pre-fixing the flange plate, the supporting part is used for supporting the pre-fixing part on the pipeline, and the pre-fixing part is arranged to enable one of two welding seams between the flange plate and the pipeline to be in an exposed state. The welding device has the advantages that the welding precision and efficiency of the pipeline flange plate are improved, the manual operation intensity is reduced, and standard flange plate connection caused by manual welding is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel face pipeline connection, in particular to a tool for pipeline flange welding. Background Art

[0002] During tunnel construction, the high-pressure wind and water required for face operations are transmitted to the face direction through flange-welded steel pipes. Traditional welding has problems such as the flange and the welded pipe not being concentric, resulting in uneven pipeline installation and difficulty in pipeline connection. In order to ensure that the weld between the welded pipe and the flange is full, strong, and leak-free, the efficiency of on-site welding operations can be accelerated, the stability of the pipeline connection can be ensured, the wind pressure and water pressure transmission losses can be reduced, and the transmission efficiency can be accelerated. This application provides a tool for pipeline flange welding. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a tool for welding pipeline flanges.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A tool for welding a pipeline flange comprises a pre-fixing part and a supporting part, wherein the pre-fixing part is used to pre-fix the flange, the supporting part is used to support the pre-fixing part on the pipeline, and the pre-fixing part is arranged so that one of the two welds between the flange and the pipeline is exposed.

[0006] Furthermore, the supporting part includes two arc-shaped positioning rings and a connecting rod connecting the two positioning rings, the positioning ring is used to put on the pipeline, and the pre-fixing part includes bolt holes and bolts, and the bolts are used to pass through the connecting holes on the flange and then connect with the bolt holes.

[0007] Furthermore, the supporting part includes a center disk, a screw rod, a threaded sleeve, a top block, a support rod and a support block. The screw rod is rotatably installed in the center of the center disk, the threaded sleeve is threadedly sleeved on the screw rod, and the top block is installed on the outer side of the threaded sleeve. There are at least three groups of top blocks, support rods and support blocks corresponding to each other. One end of the support rod is connected to the center disk, and the support block is rotatably installed on the other end of the support rod, and the top block can push the support rod to swing radially along the pipeline with one end connected to the center disk as a fulcrum.

[0008] Further, the pre-fixing part includes a fixing arm, a plug rod, a fixing plate and a locking driving part. One end of the fixing arm facing the center of the pipe is connected to the center disc. The tail end of the plug rod is slidably connected to the end of the fixing arm away from the center disc. The fixing plate is installed at the front end of the plug rod, and the end of the fixing plate away from the center disc is cam-shaped and convex relative to the plug rod. The locking driving part connects the fixing arm and the plug rod, and drives the plug rod to displace outwards so that the fixing plate and the fixing arm are clamped on both sides of the connection hole on the flange plate.

[0009] Further, two relatively distributed inclined sliding grooves are arranged inside the fixing arm. The inclined sliding grooves are inclined backwards at the outer ends. Inclined sliding blocks are slidably arranged in the inclined sliding grooves, and the inclined sliding blocks are fixedly installed on the plug rod.

[0010] Further, the locking driving part includes a driving rod and a through groove. The driving rod is installed in the fixing arm so as to be displaceable in the front-back direction. The through groove is opened at the tail end of the plug rod, and the outer end of the driving rod penetrates through the through groove.

[0011] Further, a front pushing spring is arranged inside the fixing arm, and the front end of the front pushing spring is connected to the tail end of the plug rod. A rear top wheel for contacting the rear side surface of the driving rod is arranged in the through groove.

[0012] Further, the driving rod is arranged in an "L" shape. Its radial part is located inside the fixing arm and penetrates through the through groove. Its axial part slidably penetrates through the center disc. One end of the support rod is rotatably installed at the front end of the axial part.

[0013] Further, a channel is arranged in the middle of the support rod. One end of the top block away from the center of the wire sleeve passes through the channel and is vertically provided with a stop rod. A front top wheel rotatably installed on the top block is arranged on one side of the support rod relative to the stop rod.

[0014] Further, annular sliding grooves are arranged on the circumferential surfaces of the wire sleeve and the center disc. Arc-shaped sliding blocks are arranged at the top block and the end of the fixing arm close to the center. The annular sliding grooves are slidably sleeved on the arc-shaped sliding blocks. A through hole for the axial part to penetrate through is opened on the center disc, and the through hole is an arc-shaped hole.

[0015] The utility model has the following beneficial effects:

[0016] 1. The tooling for welding pipe flanges in this application can accelerate the on-site welding operation efficiency and ensure the stability of the pipe connection. It can ensure that the flange and the pipe end are welded neatly, ensure that the subsequent butt joint of the two pipes is tightly adhered without gaps, and avoid the situation where the two welded pipes are not on the same axis during in-hole installation. When assembling in the hole, it can ensure that the air and water pipes are straight without deviation.

[0017] 2. Applying the tooling for welding pipe flanges in this application to perform flange welding operations improves the flange connection efficiency, reduces the operation intensity, improves the flange welding quality, and reduces the non-standard flange connection caused by manual welding. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the tooling for welding pipe flanges in Embodiment 1 of the present utility model when fixing the flange on the pipe;

[0019] Figure 2 is a schematic diagram of the tooling for welding pipe flanges in Embodiment 1 of the present utility model;

[0020] Figure 3 is a schematic diagram of the tooling for welding pipe flanges in Embodiment 2 of the present utility model when fixing the flange on the pipe;

[0021] Figure 4 is the present utility model Figure 3 from another perspective;

[0022] Figure 5 is a schematic diagram of the tooling for welding pipe flanges in Embodiment 2 of the present utility model;

[0023] Figure 6 is a schematic diagram of the plug rod, fixed plate, drive rod and front push spring of the present utility model.

[0024] In the figure: 1, positioning ring; 2, connecting rod; 3, bolt hole; 4, bolt; 5, central plate; 6, lead screw; 7, nut sleeve; 8, top block; 9, support rod; 10, support block; 11, fixed arm; 12, plug rod; 13, fixed plate; 14, inclined chute; 15, inclined slider; 16, drive rod; 17, through slot; 18, front push spring; 19, rear top wheel; 20, channel; 21, stop rod; 22, front top wheel; 23, annular chute; 24, arc slider; 25, through hole. Detailed Embodiment

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] As Figure 1 and Figure 2 shown, in Embodiment 1, a tool for welding a pipe flange includes a pre-fixing part and a supporting part. The pre-fixing part is used to pre-fix the flange, and the supporting part is used to support the pre-fixing part on the pipe. Moreover, the pre-fixing part is arranged such that one of the two welds between the flange and the pipe is in an exposed state.

[0027] When welding the flange to the pipe, first use the pre-fixing part to fix the flange to the supporting part, then install the supporting part on the pipe. After the flange is aligned with the pipe end, first weld the exposed weld between the flange and the pipe. Then, after removing this tool for welding the pipe flange, weld the other weld. This tool for welding the pipe flange can ensure that the welding between the flange and the pipe end is neat, ensure that the butt joint of the subsequent two pipes is tightly attached and seamless, and can ensure that the air and water pipes are straight and without deviation during the assembly in the tunnel.

[0028] Specifically, the supporting part includes two arc-shaped positioning rings 1 and a connecting rod 2 connecting the two positioning rings 1. The positioning ring 1 is used to sleeve the pipe, and the pre-fixing part includes bolt holes 3 and bolts 4. The bolts 4 are used to pass through the connecting holes on the flange and then connect to the bolt holes 3.

[0029] By leaning the flange against the surface of one of the positioning rings 1 and making the bolts 4 sequentially pass through the connecting holes on the flange and then connect to the bolt holes 3, the flange can be fixed to the pre-fixing part. Then, sleeve the positioning ring 1 on the pipe. By moving the whole on the pipe, after the outer end of the flange is aligned with the end of the pipe, perform welding operations on the exposed outer weld.

[0030] As Figures 3 to 6 shown, in Embodiment 2, the supporting part includes a central disk 5, a lead screw 6, a lead screw sleeve 7, a top block 8, a support rod 9, and a support block 10. The lead screw 6 is rotatably installed at the center of the central disk 5. The lead screw sleeve 7 is threadedly sleeved on the lead screw 6. The top block 8 is installed on the outer side surface of the lead screw sleeve 7. At least three groups of the top block 8, the support rod 9, and the support block 10 are provided in a one-to-one correspondence. One end of the support rod 9 is connected to the central disk 5, and the support block 10 is rotatably installed at the other end of the support rod 9. Moreover, the top block 8 can push the support rod 9 to swing radially along the pipe with the end connected to the central disk 5 as the fulcrum.

[0031] The pre-fixing part includes a fixing arm 11, a plug rod 12, a fixing plate 13 and a locking drive part. One end of the fixing arm 11 facing the center of the pipe is connected to the center disc 5. The tail end of the plug rod 12 is slidably connected to the end of the fixing arm 11 away from the center disc 5. The fixing plate 13 is installed at the front end of the plug rod 12, and the end of the fixing plate 13 away from the center disc 5 is cam-shaped and convex relative to the plug rod 12. The locking drive part connects the fixing arm 11 and the plug rod 12, and it makes the plug rod 12 displace outwards to clamp the connecting hole on the flange between the fixing plate 13 and the fixing arm 11 on both sides.

[0032] The plug rod 12 penetrates through the connecting hole on the flange, so that the fixing plate 13 is located on the other side of the flange. Then, through the locking drive part, the plug rod 12 drives the fixing plate 13 to displace outwards on the fixing arm 11, and finally the fixing plate 13 can cooperate with the fixing arm 11 to clamp and fix the flange.

[0033] With the device holding the flange as a reference, insert the front end of the lead screw 6 into the pipe, and make the flange sleeve on the end of the pipe. During this process, when the front side of the fixing arm 11 touches the end of the pipe, it cannot be inserted further, and at this time, the flange and the end of the pipe are aligned.

[0034] Then rotate the lead screw 6. The lead screw drives the top block 8 to displace through the lead screw sleeve 7. During the displacement of the top block 8, it drives the support rod 9 to rotate. The support rod 9 drives the support block 10 to rotate outwards along the radial direction of the pipe and abut against the inner wall of the pipe. In this way, the whole device can be supported on the pipe.

[0035] After that, the welding operation can be carried out on the inner weld first. After the inner weld is welded, rotate the lead screw in the reverse direction to separate the support block 10 from the inner wall of the pipe, and through the locking drive part, make the plug rod 12 and the fixing plate 13 displace inwards, so that the fixing plate 13 and the fixing arm 11 loosen the flange and the fixing plate 13 moves inwards to a state where it can be directly withdrawn from the connecting hole of the flange. In this way, the whole tool for welding the pipe flange can be directly removed, and then the outer weld can be welded.

[0036] Wherein, two relatively distributed inclined sliding grooves 14 are arranged in the fixing arm 11. The inclined sliding grooves 14 are inclined backwards at the outer ends. In the inclined sliding grooves 14, inclined sliding blocks 15 are slidably arranged, and the inclined sliding blocks 15 are fixedly installed on the plug rod 12.

[0037] The locking drive part includes a drive rod 16 and a through groove 17. The drive rod 16 is installed in the fixed arm 11 in a displaceable manner in the front-rear direction. The through groove 17 is opened at the tail end of the insertion rod 12, and the outer end of the drive rod 16 penetrates through the through groove 17. When the drive rod 16 is displaced backward, it pushes the insertion rod 12 backward. Under the guiding action of the inclined slider 15 and the inclined chute 14, while the insertion rod 12 and the fixed plate 13 are displaced outward as a whole, they are also displaced backward. Thus, the rear side surface of the fixed plate 13 contacts the flange, and further, the fixed plate 13 cooperates with the fixed arm 11 to clamp and fix the flange.

[0038] A front push spring 18 is arranged inside the fixed arm 11, and the front end of the front push spring 18 is connected to the tail end of the insertion rod 12. A rear top wheel 19 for contacting the rear side surface of the drive rod 16 is arranged in the through groove 17. The front push spring 18 has an elastic force in the forward direction on the insertion rod 12 for the reset of the insertion rod 12 and the fixed plate 13. The rear top wheel 19 is used to reduce the friction between the insertion rod 12 and the drive rod 16 and improve the driving effect.

[0039] The drive rod 16 is arranged in an "L" shape. Its radial part is located inside the fixed arm 11 and passes through the through groove 17. Its axial part slides through the central disk 5. One end of the support rod 9 is rotatably installed at the front end of the axial part. The end of the support rod 9 connected to the axial part is located at the rear side of the end connected to the support block 10.

[0040] Under the elastic force of the front push spring 18, the insertion rod 12 is located at the most front side position, and further, the drive rod 16 is located at the most front side position. Rotate the lead screw 6 to make the nut sleeve 7 displace backward. The nut sleeve 7 makes the support rod 9 unfold backward through the top block 8.

[0041] The first case: During the unfolding process of the support rod 9, if the drive rod 16 is displaced backward to compress the front push spring 18, the insertion rod 12 displaces inside the fixed arm 11 so that the fixed arm 11 cooperates with the fixed plate 13 to clamp and fix the flange. At this time, the drive rod 16 cannot continue to displace backward. The flange locks the drive rod 16, and at the same time, the support rod 9 cannot continue to displace backward. Further, during the subsequent process of rotating the lead screw 6 to make the nut sleeve 7 displace backward, the top block 8 will effectively drive the support rod 9 to unfold, and finally, the support block 10 stably abuts against the inner wall of the pipeline.

[0042] The second case: During the unfolding process of the support rod 9, if the front push spring 18 keeps the driving rod 16 stationary, the top block 8 will first make the supporting block 10 abut against the inner wall of the pipeline through the support rod 9. After that, when the lead screw 6 is continuously rotated, since the support rod 9 cannot be further unfolded, the whole of the supporting block 10, the support rod 9 and the wire sleeve 7 will displace outwards and cause the driving rod 16 to act. The driving rod 16 makes the fixed arm 11 and the fixed plate 13 clamp and fix the flange. Especially during the displacement of the supporting block 10 on the inner wall surface of the pipeline, by using the frictional force exerted by the supporting block 10 on the pipeline, it can ensure that the end of the pipeline is always effectively in contact with the front side surface of the fixed arm 11, improving the alignment effect between the pipeline and the flange.

[0043] A channel 20 is arranged in the middle of the support rod 9. One end of the top block 8 far from the center of the wire sleeve 7 passes through the channel 20 and is vertically provided with a stop rod 21. On the side of the support rod 9 relative to the stop rod 21, a front top wheel 22 rotatably mounted on the top block 8 is provided. During the process of reversely rotating the lead screw 6 to make the wire sleeve 7 displace forwards, the stop rod 21 makes the support rod 9 swing inwards and the supporting block 10 separate from the inner wall surface of the pipeline by pressing the outer side surface of the support rod 9.

[0044] Circular sliding grooves 23 are arranged on the circumferential surfaces of the wire sleeve 7 and the central disk 5. Arc-shaped sliding blocks 24 are arranged at one ends of the top block 8 and the fixed arm 11 close to the center. The circular sliding grooves 23 are slidably sleeved on the arc-shaped sliding blocks 24. A through hole 25 for partial axial penetration is formed in the central disk 5, and the through hole 25 is an arc-shaped hole.

[0045] By the fact that the axial part can displace circumferentially in the through hole 25 and the arc-shaped sliding block 24 can displace circumferentially in the arc-shaped sliding groove, the position of the fixed arm 11 can be adjusted axially, and further the positions of the insertion rod 12 and the fixed plate 13 in the circumferential direction can be adjusted, which can adapt to the welding operation of flanges with different connection hole spacings.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tool for welding pipe flanges, characterized in that, It includes a pre-fixing part and a supporting part. The pre-fixing part is used for pre-fixing a flange, and the supporting part is used for supporting the pre-fixing part on a pipeline. And the pre-fixing part is arranged such that one of the two welds between the flange and the pipeline is in an exposed state.

2. The fixture for welding a pipe flange according to claim 1, characterized in that, The supporting part includes two arc-shaped positioning rings (1) and a connecting rod (2) connecting the two positioning rings (1). The positioning rings (1) are used to sleeve on the pipeline. The pre-fixing part includes bolt holes (3) and bolts (4). The bolts (4) are used to pass through the connection holes on the flange and then connect with the bolt holes (3).

3. The fixture for welding a pipeline flange according to claim 1, characterized in that, The supporting part includes a central disc (5), a lead screw (6), a threaded sleeve (7), a top block (8), a support rod (9) and a support block (10). The lead screw (6) is rotatably installed at the center of the central disc (5). The threaded sleeve (7) is threadedly sleeved on the lead screw (6). The top block (8) is installed on the outer side surface of the threaded sleeve (7). At least three groups of the top block (8), the support rod (9) and the support block (10) are provided in one-to-one correspondence. One end of the support rod (9) is connected with the central disc (5). The support block (10) is rotatably installed at the other end of the support rod (9). And the top block (8) can push the support rod (9) to swing radially along the pipeline with the end connected with the central disc (5) as a fulcrum.

4. The fixture for welding a pipeline flange according to claim 3, wherein The pre-fixing part includes a fixed arm (11), a plug rod (12), a fixed plate (13) and a locking driving part. One end of the fixed arm (11) facing the center of the pipeline is connected with the central disc (5). The tail end of the plug rod (12) is slidably connected to the end of the fixed arm (11) away from the central disc (5). The fixed plate (13) is installed at the front end of the plug rod (12). And the end of the fixed plate (13) away from the central disc (5) is in a cam shape convex relative to the plug rod (12). The locking driving part connects the fixed arm (11) and the plug rod (12). It clamps the connection holes on the flange on both sides of the fixed plate (13) and the fixed arm (11) by driving the plug rod (12) to displace outwards.

5. The fixture for welding a pipeline flange according to claim 4, wherein, Two relatively distributed inclined sliding grooves (14) are arranged inside the fixed arm (11). The inclined sliding grooves (14) are inclined backwards at the outer ends. Inclined sliding blocks (15) are slidably arranged in the inclined sliding grooves (14). And the inclined sliding blocks (15) are fixedly installed on the plug rod (12).

6. The fixture for welding a pipeline flange according to claim 4, characterized in that, The locking driving part includes a driving rod (16) and a through groove (17). The driving rod (16) is installed in the fixed arm (11) so as to be displaceable in the front-rear direction. The through groove (17) is opened at the tail end of the plug rod (12). The outer end of the driving rod (16) penetrates through the through groove (17).

7. The fixture for welding a pipeline flange according to claim 6, characterized in that, A front push spring (18) is arranged inside the fixed arm (11). And the front end of the front push spring (18) is connected with the tail end of the plug rod (12). A rear top wheel (19) for contacting the rear side surface of the driving rod (16) is arranged in the through groove (17).

8. The fixture for welding a pipeline flange according to claim 6, wherein, The driving rod (16) is arranged in an "L" shape, its radial part is located inside the fixed arm (11) and passes through the through groove (17), its axial part slides through the central disk (5), one end of the support rod (9) is rotatably installed at the front end of the axial part, and the end of the support rod (9) connected to the axial part is located at the rear side of the end connected to the support block (10).

9. The fixture for welding a pipeline flange according to claim 8, wherein, A channel (20) is provided in the middle of the support rod (9), one end of the top block (8) far from the center of the wire sleeve (7) passes through the channel (20) and is vertically provided with a stop rod (21), and a front top wheel (22) rotatably installed on the top block (8) is provided on one side of the support rod (9) relative to the stop rod (21).

10. A tooling for welding a pipeline flange, as claimed in claim 9, wherein, Circular arc-shaped chutes (23) are provided on the circumferential surfaces of the wire sleeve (7) and the central disk (5), arc-shaped sliders (24) are provided at one end of the top block (8) and the fixed arm (11) close to the center, and the circular arc-shaped chutes (23) are slidably sleeved on the arc-shaped sliders (24). A through hole (25) for the axial part to penetrate is provided on the central disk (5), and the through hole (25) is an arc-shaped hole.

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