Inner diameter supporting tool for corrugated pipe welding

Abstract

The utility model relates to the technical field of corrugated pipe welding, in particular to an inner diameter supporting tool for corrugated pipe welding, which comprises a base, and the base comprises a base platform and a supporting sleeve on the base platform. The screw rod and the supporting sleeve are arranged, and the lower end of the screw rod is rotatably connected with the base; the sliding sleeve is sleeved on the threaded section of the screw rod and is meshed with the external thread of the screw rod; the abutting rods are connected to the sliding sleeve and the supporting sleeve, and the length direction of the abutting rods is parallel to the axial direction of the sliding sleeve; the driving device drives the screw to rotate and drives the sliding sleeve to move downwards, so that the abutting rod connected to the sliding sleeve moves towards the axial outer side of the sliding sleeve, the abutting rod can abut against the inner wall of the corrugated pipe joint, and therefore when the inner diameter is welded, the problem that due to the fact that the inner diameter is staggered, the coaxiality of wave plates is not enough after welding is solved, and the welding quality is improved. And the welding quality is poor.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows welding, in particular to an inner diameter supporting tool for bellows welding. Background Art

[0002] Bellows mainly include metal bellows, bellows expansion joints, bellows heat exchange tubes, diaphragm boxes and metal hoses. Metal bellows are mainly used to compensate for pipeline thermal deformation, shock absorption, and absorb pipeline settlement deformation. They are widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other industries. Plastic and other materials of bellows play an irreplaceable role in media transportation, power threading, machine tools, home appliances and other fields.

[0003] When making metal bellows, the joint and the end of the bellows need to be welded. When welding, the bellows and the joint need to be positioned using a clamping device first, and then the clamping device can be rotated so that the welding gun can perform circular welding on the bellows and the joint. However, during the welding process, since most clamping devices use external positioning of the wave plate, the inner diameter may be misaligned when welding the inner diameter, resulting in insufficient coaxiality of the wave plate after welding and poor welding quality. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an inner diameter supporting tool for bellows welding.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An inner diameter support tool for bellows welding, comprising

[0007] A base, the base comprising a base platform and a supporting sleeve thereon;

[0008] A screw rod is coaxially arranged with the supporting sleeve, and the lower end of the screw rod is rotatably connected to the base;

[0009] A sliding sleeve is sleeved on the threaded section of the screw and meshes with the external thread of the screw;

[0010] A plurality of push rods connected to the sliding sleeve and the supporting sleeve, wherein the length direction of the push rods is parallel to the axial direction of the sliding sleeve;

[0011] The screw driving device drives the screw to rotate, drives the sliding sleeve to move downward, and makes the multiple push rods connected thereto move toward the axial outside of the sliding sleeve, so that the push rods can press against the inner wall of the bellows joint.

[0012] Preferably, a lifting platform supporting the bellows is provided on the platform, and the lifting platform is driven by a hydraulic cylinder for lifting and lowering movement.

[0013] Preferably, the abutment rods are evenly distributed along the circumference of the plane where they are located, and the number of the abutment rods m≥3.

[0014] Preferably, the support rod is hinged to the sliding sleeve via a first hinge rod, and is hinged to the supporting sleeve via a second hinge rod, and the first hinge rod and the second hinge rod are hinged at a common point on the support rod.

[0015] Preferably, both ends of the support rod in the length direction are rotatably connected with rollers.

[0016] Preferably, an installation cavity is provided at the upper end of the sliding sleeve, and an L-shaped pressure rod connected to a spring is provided in the installation cavity.

[0017] Preferably, the base is driven by a base driving device to rotate in a circumferential direction;

[0018] The beneficial effect of using the utility model is: by arranging a push rod, a sliding sleeve, a screw and a screw driving device, the bellows is sleeved on the outer periphery of the push rod, the screw is driven to rotate, and the sliding sleeve is driven to move downward, so that the push rod connected thereto moves toward the axial outside of the sliding sleeve, so that the push rod can be pressed against the inner wall of the bellows joint, thereby achieving the effect of putting the bellows joint in a limited state. In this way, when welding the inner diameter, the problem of misalignment of the inner diameter is avoided, which leads to the problem of insufficient coaxiality of the wave plate and poor welding quality after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged local structure at point A in the middle;

[0021] Figure 3 for Figure 1 A magnified schematic diagram of the local structure at point B in the middle.

[0022] Reference numerals include:

[0023] 1. base, 1a. base platform, 1b. support sleeve;

[0024] 2. Screw;

[0025] 3. Base;

[0026] 4. Screw drive device;

[0027] 5. Base drive device;

[0028] 6. Hydraulic cylinder;

[0029] 7. Lifting platform;

[0030] 8. Bellows;

[0031] 9. Push the pole;

[0032] 10. Roller;

[0033] 11. A first hinged rod;

[0034] 12. A second hinged rod;

[0035] 13. Sliding sleeve;

[0036] 14. Press rod;

[0037] 15. Spring;

[0038] 16. Connector. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0040] Figure 1 The schematic diagram of the structure of the tooling is shown, and the specific structure and principle of the tooling are as follows:

[0041] like Figure 1 As shown, a corrugated pipe welding inner diameter support tooling is used for butting and tightening the corrugated pipe joints to be welded, including a base 1, including a base platform 1a and a support sleeve 1b thereon, which has the functions of connecting, supporting and separating the various parts of the tooling; a screw 2, which is coaxially arranged with the support sleeve 1b, and the lower end of the screw is rotatably connected to the base 1, and the screw 2 has both transmission and guiding functions; a sliding sleeve 13, which is sleeved on the threaded section of the screw and meshes with the external thread of the screw 2; a plurality of push rods 9, which are connected to the sliding sleeve 13 and the support sleeve 1b, and the connection method The two types are hinged, and the length direction of the push rod 9 is parallel to the axial direction of the sliding sleeve 13. The sliding sleeve 13 can slide up and down along the screw 2 under the rotation of the screw 2; the screw driving device 4 includes a driving motor and a control system. The driving motor and the screw 2 are engaged by gears to achieve forward and reverse rotation, and drive the screw 2 to rotate clockwise or counterclockwise. When the screw 2 rotates clockwise, it drives the sliding sleeve 13 to move downward, so that the multiple push rods 9 connected thereto move toward the axial outside of the sliding sleeve 13, so that the push rods 9 can press against the inner wall of the bellows joint 16.

[0042] Preferably, the platform is provided with a lifting platform 7 supporting the bellows 8, and the lifting platform 7 is driven by a hydraulic cylinder 6 for lifting and lowering. There are several hydraulic cylinders 6, which are evenly distributed, with the lower ends fixed on the base 1, and the upper ends fixed on the non-supporting surface of the lifting platform 7. The hydraulic cylinders 6 are of a multi-stage hydraulic cylinder type, which effectively reduces the length of the hydraulic cylinder 6 body, and can adjust the height of the lifting platform in a larger range so that the position of the bellows joint 16 is within the action range of the support rod 9 to ensure the tightening effect. After the welding is completed, the lifting platform 7 descends to support the welded bellows 8, making room for the next round of tightening and welding of the bellows joint 16.

[0043] Preferably, in this embodiment, the support rods 9 are evenly distributed along the circumference of the plane, and the number of the support rods 9 is m≥3. According to the three-point fixing principle, the structure is safer and more stable to ensure the stability and accuracy of the supporting tooling during operation.

[0044] Preferably, in this embodiment, the push rod 9 is hinged by the first hinged rod 11 and the sliding sleeve 13, and is hinged to the support sleeve 1b by the second hinged rod 12. The first hinged rod 11 and the second hinged rod 12 are hinged at a common point on the push rod 9. The sliding block 13 and the hinged action of the hinged rod enable the push rod to synchronously press against the bellows joint, thereby avoiding the detachment of the bellows joint due to the asynchronous pressing action.

[0045] Preferably, in this embodiment, rollers 10 are rotatably connected to both ends of the push rod 9 in the length direction, so that the contact mode between the push rod 9 and the bellows joint 16 is rolling contact, thereby avoiding the influence of the roughness of the inner wall surface of the bellows joint 16, thereby causing deviation in the tightening force of the push rod 9 on the inner wall of the bellows joint 16.

[0046] Preferably, the upper end of the sliding sleeve 13 is provided with an installation cavity, and an L-shaped pressure rod 14 connected to the spring 15 is provided in the installation cavity. There is a gap in the installation cavity, and the push rod can swing freely in the installation cavity. When the sliding sleeve 13 moves downward along the screw rod 2, it drives the L-shaped pressure rod 14 to provide vertical pressure for the bellows joint 16 to connect. The elastic pressure rod design reduces the vertical gap of the bellows joint 16 without affecting the tightening effect of the push rod 9 in the horizontal direction.

[0047] Preferably, in this embodiment, the base 1 is driven by the base driving device 5 to rotate circumferentially, which is convenient for welding workers to perform circular welding on the bellows joint 16 and improves work efficiency. The base driving device is located outside the base 1 and is arranged on the base 3, including a driving motor and a control system. The driving motor and the base 1 are engaged by gears to achieve forward and reverse rotation, thereby driving the base 1 to rotate circumferentially clockwise or counterclockwise.

[0048] Figure 2 , 3An enlarged schematic diagram of the local structure of the tooling is shown.

[0049] The working process of this embodiment is as follows:

[0050] a. Move the L-shaped pressure rod 14 in the axial direction of the screw 2, and insert the two bellows 8 to be welded into the tooling from above in sequence;

[0051] b. Adjust the pressure value of the hydraulic cylinder 6 to move the lifting platform 7 up and down, supporting the two bellows 8 so that the bellows joint 16 is within the action range of the stop rod 9;

[0052] c. Start the screw drive device 4, so that the screw 2 rotates clockwise to prop up the tooling and press against the bellows joint 16, and at the same time, the L-shaped pressure rod 14 moves downward to press the two bellows 8;

[0053] d. Start the base drive device 5, the base 1 rotates circumferentially while the circumferential welding operation of the bellows joint 16 is performed;

[0054] e. After the circumferential welding operation is completed, the base driving device 5 is turned off to stop the circumferential rotation of the base 1;

[0055] f. Start the screw drive device 4, so that the screw 2 rotates counterclockwise to shrink the tooling to a size that is convenient for exiting the bellows joint 16;

[0056] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. An inner diameter support tool for bellows welding, characterized in that: include A base, the base comprising a base platform and a supporting sleeve thereon; A screw rod is coaxially arranged with the supporting sleeve, and the lower end of the screw rod is rotatably connected to the base; A sliding sleeve is sleeved on the threaded section of the screw and meshes with the external thread of the screw; A plurality of push rods connected to the sliding sleeve and the supporting sleeve, and the length direction of the push rods is parallel to the axial direction of the sliding sleeve; The screw driving device drives the screw to rotate, drives the sliding sleeve to move vertically, and makes the multiple push rods connected thereto move toward the axial outside of the sliding sleeve, so that the push rods can press against the inner wall of the bellows joint.

2. The inner diameter support tool for bellows welding according to claim 1, characterized in that: A lifting platform for supporting the bellows is arranged on the platform, and the lifting platform is driven by a hydraulic cylinder to move up and down.

3. The inner diameter support tool for bellows welding according to claim 1, characterized in that: The abutment rods are evenly distributed along the circumference of the plane where they are located, and the number of the abutment rods m≥3.

4. The inner diameter support tool for bellows welding according to claim 1, characterized in that: The support rod is hinged to the sliding sleeve via a first hinge rod, and is hinged to the supporting sleeve via a second hinge rod. The first hinge rod and the second hinge rod are hinged at a common point on the support rod.

5. The inner diameter support tool for bellows welding according to claim 1, characterized in that: The two ends of the support rod in the length direction are rotatably connected with rollers.

6. The inner diameter support tool for bellows welding according to claim 1, characterized in that: The upper end of the sliding sleeve is provided with a mounting cavity, and an L-shaped pressure rod connected with a spring is arranged in the mounting cavity.

7. The inner diameter support tool for bellows welding according to claim 1, characterized in that: The base is driven by a base driving device to rotate in a circumferential direction.

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