Connecting pipe welding anti-deformation device for small-diameter thin-wall cylinder

Abstract

The utility model discloses a connecting pipe welding anti-deformation device of a small-diameter thin-wall cylinder, which comprises a central block and supporting mechanisms symmetrically arranged at two ends of the central block, a threaded hole is processed on the central block, a screw is screwed into the threaded hole, a conical positioning block is arranged at the end part of the screw, and a positioning block is arranged on the central block. The supporting mechanism comprises a short section and a cross rod located on the center line of the short section, the end of the short section is connected with the center block, a conical push block is arranged at the inner end of the cross rod, the outer end of the cross rod extends out of the short section, an annular block is arranged on the cross rod, and the outer side face of the annular block is in threaded connection with the inner wall of the short section. A plurality of through holes are evenly machined in the circumference of the side wall of the short section, supporting blocks are movably inserted into the through holes, the inner ends of the supporting blocks are attached to the side surface of the conical push block, the outer ends of the supporting blocks are attached to the inner wall of the small-diameter thin-wall cylinder, and springs are arranged between the outer ends of the supporting blocks and the short section. In conclusion, the anti-deformation device has the advantages of being convenient to use, capable of being repeatedly used and good in anti-deformation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of a pipe welding anti-deformation device, in particular to a pipe welding anti-deformation device for a small-diameter thin-walled cylinder. Background Art

[0002] Small-diameter pressure vessels are often found in the pressure vessel or chemical industry. The characteristics of such containers are that the diameter of the cylinder is small, which is often difficult for the human body to enter, the cylinder wall is very thin, and the length of the cylinder is long, often reaching 1 to 2 meters. Due to the needs of the process, most of the cylinders need to be welded with pipes. However, according to the principles and laws of welding deformation, the welding of the pipes will cause local shrinkage and subsidence of the cylinder. If the cylinder is made of stainless steel, the welding deformation will be more serious, and the pipes will also have a certain offset, and the axis of the pipes will deviate from the theoretical position. In order to ensure the verticality of the pipes and the roundness of the cylinder, anti-deformation measures are needed to prevent welding deformation.

[0003] At present, some anti-deformation devices used in the welding process of the pipes of the above-mentioned small-diameter thin-walled cylinders often have the following problems: first, the anti-deformation devices are mostly disposable structures, which will be directly welded on the cylinder and often cannot be reused, resulting in high cost and waste of steel; second, the anti-deformation effect is not ideal, and after welding, the cylinder will still produce a certain deformation, and the verticality of the pipe cannot be effectively guaranteed; third, it is inconvenient to use, and the welding efficiency of the pipe is not high. Therefore, it is an objective need to develop an anti-deformation device for the pipe welding of small-diameter thin-walled cylinders that is easy to use, reusable, and has a good anti-deformation effect. Utility Model Content

[0004] The utility model aims to provide a pipe welding anti-deformation device for a small-diameter thin-walled cylinder which is easy to use, reusable and has a good anti-deformation effect.

[0005] The purpose of the utility model is achieved in this way, including a center block and a supporting mechanism symmetrically arranged at both ends of the center block, a threaded hole is processed on the center block, a screw is screwed into the threaded hole, a conical positioning block is arranged at the end of the screw, the supporting mechanism includes a short section and a cross bar located on the center line of the short section, the end of the short section is connected to the center block, the inner end of the cross bar is provided with a conical push block, the outer end of the cross bar extends to the outside of the short section, an annular block is arranged on the cross bar, the outer side surface of the annular block is connected to the inner wall of the short section by a threaded connection, a plurality of through holes are evenly processed on the circumference of the side wall of the short section, a supporting block is movably inserted in the through hole, the inner end of the supporting block is fitted with the side surface of the conical push block, the outer end is fitted with the inner wall of the small diameter thin-walled cylinder, and a spring is arranged between the outer end of the support block and the short section.

[0006] Furthermore, the cross-sectional shapes of the central block and the short sections are both square, and the two ends of the central block are respectively inserted into the short sections of the two supporting mechanisms, and a length adjustment mechanism is provided between the short sections of the two supporting mechanisms.

[0007] Furthermore, a pad is provided at the outer end of the support block.

[0008] Furthermore, a high temperature resistant anti-skid pad is provided on the pad.

[0009] Furthermore, a guide sleeve is provided on the outer wall of the short section around the through hole, and the support block is located in the guide sleeve.

[0010] Furthermore, handles are provided on the conical positioning block and the cross bar.

[0011] Furthermore, the number of support blocks arranged on each short section is 3 to 6.

[0012] The utility model is used for anti-deformation treatment when welding a pipe on a small-diameter thin-walled cylinder. When it is implemented, the pipe and the small-diameter thin-walled cylinder are first spot-welded and positioned, and then the device is installed in the small-diameter thin-walled cylinder so that the position of the center block corresponds to the position of the pipe, and the support blocks of the two support mechanisms are respectively located on both sides of the pipe. Then, a screw is inserted into the pipe, and the end of the screw is screwed into the threaded hole for a distance to perform preliminary positioning on the entire device. Then, a crossbar of one of the support mechanisms is rotated, and the ring block is driven to rotate when the crossbar rotates. When the ring block rotates, it moves toward the direction of the center block. That is, the cross bar and the conical push block are driven to move toward the center block. When the side surface of the conical push block contacts the inner end of the support block, the support block is forced to move outward as the conical push block continues to move until the outer end of the support block abuts against the inner wall of the small-diameter thin-walled cylinder. Stop rotating the cross bar and finally tighten the screw so that the side surface of the conical positioning block abuts against the end of the pipe. The installation of the device described in the utility model is completed, and the pipe welding of the small-diameter thin-walled cylinder can be carried out. After welding is completed, the screw is rotated in the opposite direction to take out the screw and the conical positioning block, and the cross bar is rotated in the opposite direction. The support block can be removed after loosening. In the utility model, the whole device is not welded with the small-diameter thin-walled cylinder and the pipe, and can be easily installed and disassembled according to the needs of pipe welding, can be repeatedly recycled, and the use cost is not high. Each component can be made of waste materials, and there is no problem of material waste; secondly, the utility model is provided with a central block and two supporting mechanisms, and the two supporting mechanisms are located at both ends of the central block. The inner wall of the small-diameter thin-walled cylinder on both sides of the pipe is supported by the supporting blocks respectively to prevent the local shrinkage and sinking of the small-diameter thin-walled cylinder, thereby preventing the deformation of the small-diameter thin-walled cylinder and ensuring the roundness of the small-diameter thin-walled cylinder after welding. At the same time, the structure of the screw and the conical positioning block is used to insert the screw into the threaded hole for positioning, and then the pipe is positioned and supported by the conical positioning block to prevent the pipe from being offset and ensure that the axis of the pipe will not deviate from the theoretical position. Overall, it has a good anti-deformation effect; in addition, the installation and disassembly of the device only requires the rotation of the screw and the cross bar, and the operation is relatively convenient and quick, which can not only improve the welding efficiency of the pipe, but also improve the welding quality of the pipe. In summary, the utility model has the advantages of being easy to use, reusable and having good anti-deformation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the short section 4 and the support block 8 in the utility model;

[0015] In the figure: 1-center block, 2-screw, 3-conical positioning block, 4-short section, 5-cross bar, 6-conical push block, 7-annular block, 8-support block, 9-small diameter thin-walled cylinder, 10-spring, 11-length adjustment mechanism, 12-pad, 13-high temperature resistant anti-skid pad, 14-guide sleeve, 15-handle, 16-pipe. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.

[0017] like Figures 1-2 As shown, the utility model includes a center block 1 and a supporting mechanism symmetrically arranged at both ends of the center block 1. A threaded hole is processed on the center block 1, and a screw 2 is screwed into the threaded hole. A conical positioning block 3 is arranged at the end of the screw 2. The conical positioning block 3 has a positioning function and a centering function. When the screw 2 is inserted into the threaded hole and fixed by the conical positioning block 3, the butt joint 16 has a limiting function, which can prevent the butt joint 16 from deviating. The supporting mechanism includes a short section 4 and a cross bar 5 located on the center line of the short section 4. The short section 4 is a cylindrical section with a smaller diameter. The end of the short section 4 is connected to the center block 1. The inner end of the cross bar 5 is provided with a conical push block 6. The cross bar 5 The outer end extends to the outside of the short section 4, and an annular block 7 is arranged on the cross bar 5. The outer side surface of the annular block 7 is connected to the inner wall of the short section 4 by a threaded connection. A plurality of through holes are evenly processed on the circumference of the side wall of the short section 4, and a support block 8 is movably inserted in the through hole. The inner end of the support block 8 fits with the side surface of the conical push block 6, and the outer end fits with the inner wall of the small diameter thin-walled cylinder 9. A spring 10 is arranged between the outer end of the support block 8 and the short section 4. The spring 10 can prevent the support block 8 from sliding out of the through hole. At the same time, under the action of the contraction and tensioning force of the spring 10, the inner end of the support block 8 can always be against the side surface of the conical push block 6, which is conducive to the normal use of the device.

[0018] The utility model is used for anti-deformation treatment when welding a pipe 16 on a small-diameter thin-walled cylinder 9. When implemented, the pipe 16 and the small-diameter thin-walled cylinder 9 are first spot-welded and positioned, and then the device is installed in the small-diameter thin-walled cylinder 9, so that the position of the center block 1 corresponds to the position of the pipe 16, and the support blocks 8 of the two support mechanisms are respectively located on both sides of the pipe 16, and then the screw 5 is inserted into the pipe 16, and the end of the screw 5 is screwed into the threaded hole for a distance, and the entire device is preliminarily positioned, and then the cross bar 5 of one of the support mechanisms is rotated, and when the cross bar 5 rotates, the annular block 7 is driven to rotate, and when the annular block 7 rotates, it moves toward the direction of the center block 1. That is, the cross bar 5 and the conical push block 6 are driven to move toward the direction of the center block 1. When the side surface of the conical push block 6 contacts the inner end of the support block 8, as the conical push block 6 continues to move, the support block 8 is forced to move outward until the outer end of the support block 8 abuts against the inner wall of the small-diameter thin-walled cylinder 9. The rotation of the cross bar 5 is stopped, and finally the screw 2 is tightened so that the side surface of the conical positioning block 3 abuts against the end of the pipe 16. The installation of the device described in the utility model is completed, and the pipe 16 of the small-diameter thin-walled cylinder 9 can be welded. After welding, the screw 2 is rotated in the opposite direction, the screw 2 and the conical positioning block 3 are taken out, the cross bar 5 is rotated in the opposite direction, and the support block 8 is loosened and taken out. In the present invention, the whole device is not welded with the small-diameter thin-walled cylinder 9 and the pipe 16, and can be easily installed and disassembled according to the welding needs of the pipe 16, and can be repeatedly recycled for many times, with low cost of use, and each component can be made of waste materials, so there is no problem of material waste; secondly, the present invention is provided with a central block 1 and two supporting mechanisms, and the two supporting mechanisms are located at both ends of the central block 1, and the inner walls of the small-diameter thin-walled cylinder 9 on both sides of the pipe 16 are supported by the supporting blocks 8 respectively, so as to prevent the small-diameter thin-walled cylinder 9 from shrinking and sinking locally, thereby preventing the small The deformation of the small-diameter thin-walled cylinder 9 is ensured to ensure the roundness of the small-diameter thin-walled cylinder 9 after welding. At the same time, the structure of the screw 2 and the conical positioning block 3 is used to insert the screw 2 into the threaded hole for positioning, and then the conical positioning block 3 is used to position and support the connecting pipe 16 to prevent the connecting pipe 16 from offset and ensure that the axis of the connecting pipe 16 does not deviate from the theoretical position. Overall, it has a good anti-deformation effect. In addition, the installation and disassembly of the device only requires the rotation of the screw 2 and the cross bar 5, and the operation is relatively convenient and quick, which can not only improve the welding efficiency of the connecting pipe 16, but also improve the welding quality of the connecting pipe 16.

[0019] The cross-sectional shapes of the center block 1 and the short section 4 are both square, and the two ends of the center block 1 are respectively inserted into the short sections 4 of the two supporting mechanisms, and a length adjustment mechanism 11 is provided between the short sections 4 of the two supporting mechanisms. When the device is in use, the support blocks 8 of the two supporting mechanisms are used to support the small-diameter thin-walled cylinders 9 on both sides of the pipe 16. It can be seen that the support blocks 8 are located on both sides of the pipe 16, but if the diameter of the pipe 16 changes and becomes too small or too large, the device will no longer be applicable. In order to solve this problem, a length adjustment mechanism 11 is provided, and the distance between the two short sections 4 can be adjusted by the length adjustment mechanism 11, and then the distance between the two supporting mechanisms can be adjusted to ensure that the support blocks 8 of the two supporting mechanisms can always be located on both sides of the pipe 16, and a better support effect is achieved. In actual use, the length adjustment mechanism 11 can use a threaded adjustment mechanism, that is, the length adjustment mechanism 11 includes two short rods with reverse threads, the two short rods are connected by a screw sleeve, and the other ends of the short rods are respectively connected to two short sections 4. In this way, the distance between the two supporting mechanisms can be adjusted by simply rotating the screw sleeve forward and backward. The length adjustment mechanism 11 can also use other forms that can meet the use requirements of the device.

[0020] A pad 12 is provided at the outer end of the support block 8. When the device is in use, on the one hand, it fixes itself by the support block 8, and on the other hand, it supports the small-diameter thin-walled cylinder 9 through the support block 8 to prevent the small-diameter thin-walled cylinder 9 from welding deformation. This will result in a large supporting force between the outer end of the support block 8 and the small-diameter thin-walled cylinder 9, which may cause an outward bulge on the small-diameter thin-walled cylinder 9. In order to avoid this problem, a pad 12 is provided. The contact area between the pad 12 and the small-diameter thin-walled cylinder 9 is larger, which can disperse the distribution of force and thus prevent the problem of bulging of the small-diameter thin-walled cylinder 9. Secondly, the contact area is increased by the pad 12, which can also improve the support stability of the device and avoid slippage between the support block 8 and the small-diameter thin-walled cylinder 9.

[0021] In order to improve the stability of the device during use, a high-temperature resistant anti-skid pad 13 is provided on the pad 12. The high-temperature resistant anti-skid pad 13 is a prior art. On the one hand, it has good high-temperature resistance and will not be burned by the high temperature generated during welding. On the other hand, it has good anti-skid performance to ensure that the support block 8 will not slip between the inner wall of the small-diameter thin-walled cylinder 9 during use. Generally speaking, the support effect of the device can be improved by setting the high-temperature resistant protective pad 13.

[0022] A guide sleeve 14 is provided on the outer wall of the short section 4 around the through hole, and the support block 8 is located in the guide sleeve 14. During the long-term use of the device, it is found that in the process of using the conical push block 6 to push the support block 8 outward, the support block 8 is prone to skewing, jamming and other problems, which reduces the supporting effect of the small-diameter thin-walled cylinder 9 and is also inconvenient to operate. In order to solve this problem, a guide sleeve 14 is provided, and the support block 8 slides in the guide sleeve 14. The guide sleeve 14 plays a role of limiting and guiding the support block 8, ensuring that the support block 8 will not skew, thereby ensuring that the support block 8 can move smoothly under the push of the conical push block 6, thereby improving the operating efficiency of the device and improving the supporting effect of the support block 8 on the small-diameter thin-walled cylinder 9.

[0023] A handle 15 is provided on the conical positioning block 3 and the cross bar 5. During the installation and disassembly process of the device, the cross bar 5 needs to be rotated and the screw 2 needs to be turned at the same time. However, there is an inconvenient operation problem in actual operation. The cross bar 5 and the screw 2 cannot be easily turned and tightened. In order to improve the portability of the device, a handle 15 is provided. The handle 15 is an existing structure, which is convenient for the rotation of the cross bar 5 and the screw 2.

[0024] Preferably, the number of support blocks 8 provided on each short section 4 is 3 to 6, and the support blocks 8 are evenly distributed around the circumference of the short section 4, that is, 3 to 6 support blocks 8 are provided along a circle of the short section 4, and the 3 to 6 support blocks 8 work together to support the small-diameter thin-walled cylinder 9, so as to prevent the small-diameter thin-walled cylinder 9 from being deformed when the connecting pipe 16 is welded. In actual use, the number of support blocks 8 can be determined according to the diameter of the small-diameter thin-walled cylinder 9, the diameter of the connecting pipe 16, etc., as long as it can play a better supporting role.

[0025] If necessary, a refueling hole can be provided on the short section 4, and a certain amount of lubricating oil can be added to the side surface of the conical push block 6 through the refueling hole to prevent the conical push block 6 and the support block 8 from getting stuck.

Claims

1. A device for preventing deformation of a pipe welding of a small-diameter thin-walled cylinder, comprising a central block (1) and support mechanisms symmetrically arranged at both ends of the central block (1), characterized in that The center block (1) is processed with a threaded hole, a screw (2) is screwed into the threaded hole, a conical positioning block (3) is arranged at the end of the screw (2), the support mechanism comprises a short section (4) and a cross bar (5) located on the center line of the short section (4), the end of the short section (4) is connected to the center block (1), the inner end of the cross bar (5) is provided with a conical push block (6), the outer end of the cross bar (5) extends to the outside of the short section (4), an annular block (7) is arranged on the cross bar (5), the outer side surface of the annular block (7) is connected to the inner wall of the short section (4) by a thread, a plurality of through holes are evenly processed on the side wall of the short section (4), a support block (8) is movably inserted in the through hole, the inner end of the support block (8) is in contact with the side surface of the conical push block (6), and the outer end is in contact with the inner wall of the small diameter thin-walled cylinder (9), and a spring (10) is arranged between the outer end of the support block (8) and the short section (4).

2. The device for preventing deformation of pipe welding of a small-diameter thin-walled cylinder according to claim 1 is characterized in that The cross-sectional shapes of the central block (1) and the short section (4) are both square, and the two ends of the central block (1) are respectively inserted into the short sections (4) of the two supporting mechanisms, and a length adjustment mechanism (11) is provided between the short sections (4) of the two supporting mechanisms.

3. The device for preventing deformation of pipe welding of a small-diameter thin-walled cylinder according to claim 1 is characterized in that A pad (12) is provided at the outer end of the support block (8).

4. The device for preventing deformation of pipe welding of a small-diameter thin-walled cylinder according to claim 3 is characterized in that A high temperature resistant anti-skid pad (13) is provided on the pad (12).

5. The device for preventing deformation of pipe welding of a small-diameter thin-walled cylinder according to claim 1 is characterized in that A guide sleeve (14) is provided on the outer wall of the short section (4) around the through hole, and the support block (8) is located inside the guide sleeve (14).

6. The device for preventing deformation of pipe welding of a small-diameter thin-walled cylinder according to claim 1, characterized in that The conical positioning block (3) and the cross bar (5) are both provided with a handle (15).

7. The device for preventing deformation of pipe welding of a small-diameter thin-walled cylinder according to claim 1, characterized in that The number of support blocks (8) provided on each short section (4) is 3 to 6.

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