Round tube welding fixing frame

Abstract

The utility model discloses a round pipe welding fixing frame which comprises a table body and an air injection gun, a pipe penetrating opening allowing a round pipe to be inserted into the table body to be welded is formed in the table body, and three eccentric clamping devices which are distributed in an equilateral triangle shape with the pipe penetrating opening as the center are rotatably arranged on the table body. The eccentric clamping device comprises a cylindrical clamping block and a rotating shaft arranged at the eccentric position of the clamping block, and the rotating shaft is rotationally arranged on the table body. The driving device is arranged on the table body and used for driving the three eccentric clamping devices to rotate synchronously, so that the clamping blocks rotate with the rotating shaft as the center and change the distance between the clamping blocks and the center of the pipe penetrating opening to clamp the circular pipe. And the output end of the air pump is communicated with the air injection gun through a pipeline. According to the clamping device, the clamping distance can be changed in an eccentric adjustment mode, gas pipes and welding pipes with different pipe opening diameters can be conveniently, rapidly and stably clamped, and therefore follow-up welding operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a round pipe welding fixing frame. Background Art

[0002] Air separation equipment uses air as raw material, converts air into liquid through compression cycle deep freezing, and then gradually separates and produces inert gases such as oxygen, nitrogen and argon from liquid air through distillation. Air separation equipment is now widely used, and the pipelines used in air separation equipment need to be welded, which has high requirements for welding quality. During welding, gas needs to be introduced into the pipe to protect the inside of the pipe to improve the welding quality. During the welding process, the welded pipe needs to be clamped and fixed to ensure that the welding process is stable and accurate. Due to the large number of welded pipes and the different pipe orifice diameters of the pipes, it is often necessary to adjust the clamping spacing of the clamping structure to adapt to the clamping and fixing of pipes with various pipe orifice diameters. However, due to the circular shape of the pipe, the clamping structure is often difficult to clamp and fix pipes with different pipe orifice diameters conveniently and stably, and there are limitations in its use. Utility Model Content

[0003] The purpose of the utility model is to provide a round tube welding fixing frame to solve the above-mentioned shortcomings, so as to realize convenient and stable clamping of air pipes and welding pipes with different pipe opening diameters for subsequent welding.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a round tube welding fixing frame, comprising:

[0005] A platform and an air injection gun, wherein the platform is provided with a pipe insertion port for inserting a round pipe therein for welding, and the platform is rotatably provided with three eccentric clamping devices distributed in an equilateral triangle with the pipe insertion port as the center;

[0006] The eccentric clamping device comprises a cylindrical clamping block and a rotating shaft arranged at an eccentric position of the clamping block, and the rotating shaft is rotatably arranged on the platform;

[0007] A driving device is arranged on the platform, and is used to drive the three eccentric clamping devices to rotate synchronously, so that the clamping block rotates around the rotating shaft and changes the distance from the center of the pipe threading port to clamp the round pipe;

[0008] The air pump has an output end which is connected to the air injection gun through a pipeline, and the air injection gun is used to input gas into the circular tube.

[0009] Furthermore, the driving device includes a gear arranged on each of the rotating shafts, a gear ring rotatably arranged on the platform body, and a worm arranged at the bottom of the gear ring, the gear ring is meshed with multiple gears, the gear ring is an internal gear ring, and the outer wall of the gear ring is provided with worm wheel teeth that cooperate with the worm, the worm is rotatably arranged in the platform body, and one end of the worm extends outside the platform body. Rotating the worm causes the gear ring with worm wheel teeth to rotate and drives the gear meshed with the gear ring to rotate, so that the rotating shaft is adjusted with its rotation.

[0010] Furthermore, an insertion sleeve is provided at one end of the worm extending outside the platform body, and the insertion sleeve is used for inserting a handle.

[0011] Furthermore, a soft sealing sleeve is provided at the muzzle of the air injection gun, and one end of the sealing sleeve close to the muzzle of the air injection gun is conical.

[0012] Furthermore, a base is provided at the bottom of the platform, a bracket is provided on the base, and the gas injection gun is detachably provided on the bracket.

[0013] Furthermore, a guide groove with an annular shape is provided on the gear ring, and a limit plate adapted to the guide groove is provided in the platform body, and the limit plate is always located in the guide groove when the gear ring is rotated and adjusted.

[0014] The beneficial effects of the utility model are embodied in:

[0015] The utility model drives the three eccentric clamping devices to adjust in linkage through a driving device, so that the clamping blocks in the three eccentric clamping devices rotate around the rotating shaft, and are distributed outside the pipeline in an equilateral triangle and gradually approach the pipeline until they fit the pipeline and clamp it. This structure can clamp and fix the pipeline very conveniently without the need for additional installation and disassembly processing, and because the rotating shaft is installed at the eccentric part of the clamping block, the clamping block has a large adjustment range during rotation, and can clamp a variety of air pipes and welding pipes with different pipe opening diameters conveniently and stably, thereby facilitating subsequent welding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional view of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is a schematic diagram of adjusting the eccentric clamping device in the utility model;

[0019] Figure 4 It is a partial view of the air injection gun of the utility model;

[0020] Figure 5 It is a top view of the utility model;

[0021] Figure 6 It is a partial view of the gear ring in the utility model.

[0022] In the figure:

[0023] 1. Platform; 2. Base; 3. Eccentric clamping device; 31. Rotating shaft; 32. Clamping block; 4. Gear; 5. Gear ring; 6. Worm gear; 7. Worm; 8. Insert sleeve; 9. Bracket; 10. Air injection gun; 11. Air pump; 12. Sealing sleeve; 13. Pipe insertion port; 14. Guide groove; 15. Limiting piece. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-6 The utility model discloses a round tube welding fixture, including a platform 1 and an air injection gun 10. The platform 1 is provided with a pipe insertion port 13 for inserting a round tube therein for welding, and three eccentric clamping devices 3 distributed in an equilateral triangle with the pipe insertion port 13 as the center are rotatably installed on the platform 1, wherein the eccentric clamping device 3 includes a clamping block 32 in the form of a cylinder and a rotating shaft 31 installed at an eccentric position of the clamping block 32, and the rotating shaft 31 is rotatably installed on the platform 1.

[0026] In one embodiment, a driving device is provided on the platform 1, and the driving device is used to drive the three eccentric clamping devices 3 to rotate synchronously, so that the clamping block 32 rotates around the rotating shaft 31 and changes the distance with the center of the pipe insertion port 13 to clamp the round tube. The device also includes an air pump 11, and the output end of the air pump 11 is connected to the air injection gun 10 through a pipeline, and the air injection gun 10 is used to input gas into the round tube.

[0027] In the specific implementation, when it is necessary to fix the air pipe and the welding pipe, the relevant pipe is passed through the pipe insertion port 13 so that it is located at the center of the three eccentric clamping devices 3, and then the clamping block 32 is driven by the driving device to rotate around the rotating shaft 31. Since the rotating shaft 31 is installed at the eccentric position of the clamping block 32, the distance between the clamping block 32 and the pipe will gradually decrease during the rotation process, and the clamping block 32 continues to rotate until it fits the pipe. In addition, the three eccentric clamping devices 3 are all adjusted by the driving device in linkage, so the clamping blocks 32 in the three eccentric clamping devices 3 will contact the pipe at the same time, and they are distributed in an equilateral triangle on the outside of the pipe to clamp it, so that the pipe clamping is very stable. This structure does not require additional installation and disassembly processing, and can clamp and fix the pipe very conveniently and stably. In addition, since the rotating shaft 31 is installed at the eccentric position of the clamping block 32, the clamping block 32 has a large adjustment range during rotation, and can clamp air pipes and welding pipes with various different pipe diameters conveniently and stably, thereby facilitating subsequent welding operations.

[0028] In one embodiment, the driving device includes a gear 4 installed on each rotating shaft 31, a ring gear 5 rotatably installed on the platform 1, and a worm 7 arranged at the bottom of the ring gear 5, wherein the ring gear 5 is meshed with multiple gears 4, and the ring gear 5 is an internal ring gear, and worm wheel teeth 6 cooperating with the worm 7 are installed on the outer wall of the ring gear 5, and the worm 7 mentioned above is rotatably installed in the platform 1, and one end of the worm 7 extends outside the platform 1.

[0029] In a specific implementation, when it is necessary to adjust the three eccentric clamping devices 3 to fix the pipeline, the ring gear 5 with the worm gear teeth 6 is rotated by rotating the worm 7, thereby driving the gear 4 meshing with the ring gear 5 to rotate. In this process, the rotating shaft 31 is rotated and adjusted synchronously with the above adjustment, so that the rotating shaft 31 can rotate synchronously, and when the adjustment is completed, since the worm 7 and the worm gear teeth 6 belong to the matching mode of worm gear, it can be ensured that the ring gear 5 will not rotate when the worm 7 is not moved, so that the eccentric clamping device 3 can ensure stable clamping and fixation of the pipeline after the adjustment is completed.

[0030] In one embodiment, an insertion sleeve 8 is installed at one end of the worm 7 extending outside the platform 1, and the insertion sleeve 8 is used to insert a handle to facilitate manual adjustment by an operator. In actual circumstances, a motor can also be equipped, and the output shaft of the motor can be inserted into the insertion sleeve 8, and the eccentric clamping device 3 can be automatically controlled by the motor to clamp and fix the pipeline.

[0031] In one embodiment, a soft sealing sleeve 12 is provided at the muzzle of the air injection gun 10 , and one end of the sealing sleeve 12 close to the muzzle of the air injection gun 10 is conical. In actual use, the sealing sleeve 12 can be made of silicone.

[0032] In a specific implementation, when welding the pipeline, the gas injection gun 10 can be inserted into the other end of the pipeline away from the welding point, and the input end of the air pump 11 can be connected to a gas source (such as carbon dioxide gas). The gas mainly plays a protective role. When in use, the gas is transported and passed through the welding position to prevent the welding area from being invaded by harmful gases such as oxygen and nitrogen in the air, thereby improving the welding quality. During this process, the sealing sleeve 12 is simultaneously inserted into the pipeline to seal one end of the pipeline so that the gas can only be transported to the welding point of the pipeline. Since one end of the sealing sleeve 12 is conical and the sealing sleeve 12 is soft and deformable, the sealing sleeve 12 can be inserted into pipelines with different inner diameters of the pipe orifices for sealing. It can be understood that the above-mentioned sealing sleeve 12 is a consumable part and can be replaced in time after the service life is reached to ensure the use effect.

[0033] In one embodiment, a base 2 is installed at the bottom of the platform 1, a bracket 9 is installed on the base 2, and an air injection gun 10 is detachably inserted into the bracket 9. When not in use, the air injection gun 10 can be inserted into the bracket 9.

[0034] In one embodiment, a guide groove 14 with an annular shape is provided on the surface of the ring gear 5, and a limit plate 15 adapted to the guide groove 14 is installed in the platform 1. When in use, the limit plate 15 is always located in the guide groove 14 when the ring gear 5 is rotated and adjusted, so that the structure of the ring gear 5 is always guaranteed to be stable during the rotation adjustment process, and it can effectively prevent it from leaving the original position.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] In addition, "plurality" means two or more.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A round tube welding fixture, characterized in that: include, A platform (1) and an air injection gun (10), wherein the platform (1) is provided with a pipe insertion opening (13) for inserting a round pipe therein for welding, and the platform (1) is rotatably provided with three eccentric clamping devices (3) distributed in an equilateral triangle with the pipe insertion opening (13) as the center; The eccentric clamping device (3) comprises a cylindrical clamping block (32) and a rotating shaft (31) arranged at an eccentric position of the clamping block (32), and the rotating shaft (31) is rotatably arranged on the platform (1); A driving device is arranged on the platform (1), and is used to drive the three eccentric clamping devices (3) to rotate synchronously, so that the clamping block (32) rotates around the rotating shaft (31) and changes the distance from the center of the pipe insertion opening (13) to clamp the round pipe; The driving device comprises a gear (4) arranged on each of the rotating shafts (31), a gear ring (5) rotatably arranged on the platform (1), and a worm (7) arranged at the bottom of the gear ring (5); the gear ring (5) meshes with the plurality of gears (4); the gear ring (5) is an internal gear ring; worm wheel teeth (6) cooperating with the worm (7) are arranged on the outer wall of the gear ring (5); the worm (7) is rotatably arranged in the platform (1), and one end of the worm (7) extends outside the platform (1); the worm (7) is rotated to rotate the gear ring (5) having the worm wheel teeth (6) and drive the gear (4) meshing with the gear ring (5) to rotate, so that the rotating shaft (31) is adjusted with the rotation thereof; The output end of the air pump (11) is connected to the air injection gun (10) through a pipeline, and the air injection gun (10) is used to input gas into the circular tube.

2. According to claim 1, a round tube welding fixture, characterized in that: An insertion sleeve (8) is provided at one end of the worm (7) extending outside the platform (1), and the insertion sleeve (8) is used for inserting a handle.

3. The round tube welding fixture according to claim 1, characterized in that: A soft sealing sleeve (12) is arranged at the muzzle of the gas injection gun (10), and one end of the sealing sleeve (12) close to the muzzle of the gas injection gun (10) is conical.

4. The round tube welding fixture according to claim 1, characterized in that: A base (2) is provided at the bottom of the platform (1), a bracket (9) is provided on the base (2), and the gas injection gun (10) is detachably arranged on the bracket (9).

5. The round tube welding fixture according to claim 1, characterized in that: The gear ring (5) is provided with a guide groove (14) in the shape of an annulus, and a limiting plate (15) adapted to the guide groove (14) is arranged in the platform (1). When the gear ring (5) is rotated for adjustment, the limiting plate (15) is always located in the guide groove (14).

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