Clamps for pipe clamping

Abstract

The present invention discloses a clamp for clamping a pipe, which locks the pipe by moving double jaws to prevent the pipe from deflecting during the clamping process; and the clamping process of the entire clamp is an arc motion mode, and the clamping force of locking the pipe is more stable compared to a linear motion mode. The present invention not only realizes three-point positioning and circle center finding of the pipe through a stopper with an inverted V-shaped opening, but also the three-point positioning is more accurate and stable compared to the existing two-point positioning.

Description

Technical Field

[0001] The invention relates to a pipe clamping device, in particular to a clamp used for pipe clamping. Background Art

[0002] Welding is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. There are many sources of energy for modern welding, including gas flame, arc, laser, electron beam, friction and ultrasonic.

[0003] Pipes are widely used, mainly in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. Straight pipe welding is one of the most common techniques for pipeline installation. In order to extend the length of the pipeline, the two ends of the welded pipe need to be aligned when welding. However, the outer wall of the pipe is smooth, which makes it difficult to fix and move during docking. It is difficult to ensure neat docking. The misalignment of the interface is large during welding, making it difficult to achieve the expected welding effect. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a clamp for pipe clamping, which solves the problem of pipe positioning and locking.

[0005] Technical solution: The clamp for pipe clamping of the present invention comprises:

[0006] Clamping handle, which is used to radially lock or release the pipe;

[0007] Clamping rod 1 and clamping rod 2, clamping rod 1 is directly hinged to the clamping handle, clamping rod 2 is hinged with a transition piece, the transition piece and the clamping handle are hinged, each of the above hinges is equipped with a pin shaft and the pin shaft is reserved with a certain length, when the clamping handle is pressed down, clamping rod 1 and clamping rod 2 are close to each other, and the clamp is in a locked state, when the clamping handle is lifted up, clamping rod 1 and clamping rod 2 are away from each other, and the clamp is in an open state;

[0008] A pair of clamping jaws, one of which is hinged to the tail end of clamping rod one, and the other clamping jaw is hinged to the tail end of clamping rod two;

[0009] The front wall plate and the rear wall plate are provided with straight slots for installing the pins at the hinges. The front wall plate and the rear wall plate are used to assemble the clamping handle, the first clamping rod and the second clamping rod, and keep the clamping handle, the first clamping rod and the second clamping rod moving in the same plane;

[0010] A lifting assembly, on which the rear wall panel is arranged;

[0011] The stopper is arranged at the bottom of the lifting assembly and is provided with an inverted V-shaped opening. The inverted V-shaped opening is located at the bottom of the rear wall plate and extends out of the front wall plate. The inverted V-shaped opening is used to clamp and determine the center of the pipe. The lifting assembly drives the stopper to move up and down to fix pipes of different radii.

[0012] The block is provided with left and right opposite mounting holes, which are located on both sides of the inverted V-shaped opening. The mounting holes are connected with guide shafts, which extend out of the mounting holes. A needle bearing is installed on the top of the guide shaft. Waist-shaped grooves are opened on the rod bodies of the clamping rod one and the clamping rod two. The needle bearings are assembled into the waist-shaped grooves. When the clamping handle is pressed down, the waist-shaped groove moves upward, and the needle bearing rolls along the lower inner wall of the waist-shaped groove. At the same time, the outer wall of the needle bearing squeezes the lower inner wall of the waist-shaped groove, so that the pipeline is locked to prevent loosening.

[0013] By adopting the above technical solution, the clamp is installed on a welding machine or other equipment that requires pipe clamping, and the inverted V-shaped mouth of the stopper is fitted on the pipe surface to perform preliminary pipe positioning. The inverted V-shaped mouth can prevent the pipe from lateral displacement to ensure that the pipes are aligned with each other. Then, the clamping handle is pressed down, and the clamping rod 1 and the clamping rod 2 are close to each other. The clamping claws on the clamping rod 1 and the clamping rod 2 are against the pipe surface. Then, the pressure is continued to be pressed down, and the clamping handle locks the clamping rod 1 and the clamping rod 2, that is, the entire clamp is locked. During the pressing process, the waist-shaped groove moves upward, the needle bearing rolls along the waist-shaped groove, and the outer wall of the needle bearing squeezes the lower inner wall of the waist-shaped groove to lock the pipe to prevent it from loosening.

[0014] Beneficial effect: In the present invention, the double clamping jaws are moved to lock the pipeline, which can prevent the pipeline from being offset during the clamping process; and the clamping process of the entire clamp is an arc movement mode, and the clamping force of the pipeline is more stable compared to the linear movement mode. The present invention not only realizes the three-point positioning and center finding of the pipeline through the block with an inverted V-shaped mouth, but also the three-point positioning is more accurate and stable compared to the existing two-point positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the clamp used for pipe clamping;

[0016] Figure 2 is an exploded view of a fixture used for pipe clamping. DETAILED DESCRIPTION

[0017] like Figure 1 and 2 As shown, a clamp for clamping a pipe comprises a clamping handle 1, a clamping rod 1 2 and a clamping rod 2 3, a pair of clamping claws 5, a front wall plate 6 and a rear wall plate 7, a lifting assembly 9 and a stopper 10.

[0018] The clamping handle 1 is used for radially locking or releasing the pipe with a clamp, and a transverse block with grooves 19 at both ends is provided at the bottom end of the clamping handle 1 .

[0019] Clamp rod 1 2 and clamp rod 2 3, clamp rod 1 2 is embedded in the groove 19 of the horizontal block of the clamping handle 1 and is hinged to the clamping handle 1, clamp rod 2 3 is hinged with a transition piece 4, the transition piece 4 is embedded in the groove 19 at one end of the horizontal block of the clamping handle 1 and is hinged to the clamping handle 1, each of the above-mentioned hinges is installed with a pin and the pin is reserved for a certain length, the reserved length of the pin is used to be embedded in the front wall plate 6, when the clamping handle 1 is pressed down, clamp rod 1 2 and clamp rod 2 3 are close to each other, and the clamp is in a locked state, when the clamping handle 1 is lifted, clamp rod 1 2 and clamp rod 2 3 are away from each other, and the clamp is in an open state.

[0020] A pair of clamping jaws 5, one of the clamping jaws 5 is hinged to the tail end of the clamping rod 1 2, and the other clamping jaw 5 is hinged to the tail end of the clamping rod 2 3; the part of the clamping jaw 5 acting on the pipe is provided with an inverted V-shaped opening.

[0021] The front wall plate 6 and the rear wall plate 7 are provided with a straight slot 8 for installing the pins at the above-mentioned hinges. The front wall plate 6 and the rear wall plate 7 are used to assemble the clamping handle 1, the clamping rod 1 2 and the clamping rod 2 3, and keep the clamping handle 1, the clamping rod 1 2 and the clamping rod 2 3 moving in the same plane; and the rear wall plate 7 is provided with a connecting column 18, and the front wall plate 6 is provided with a groove 19 with a mounting hole 12. When the front wall plate 6 and the rear wall plate 7 are fixed, the connecting column 18 is embedded in the groove 19. The thickness of the connecting column 18 is similar to the overall thickness of the clamping handle 1, the clamping rod 1 2 and the clamping rod 2 3, so as to ensure that when the clamp moves, the clamping handle 1, the clamping rod 1 2 and the clamping rod 2 3 move in accordance with the inner wall of the front wall plate 6 and the rear wall plate 7. Compared with only using a pin between the front wall plate 6 and the rear wall plate 7, the contact area of ​​the connecting column 18 is larger, and the horizontality between the front wall plate 6 and the rear wall plate 7 can be kept consistent or similar.

[0022] The lifting assembly 9 includes a fixed block 91 with a dovetail groove, a dovetail slider 92, a gasket 93 and a screw 94 (not shown in the figure). The dovetail slider 92 is embedded in the dovetail groove, the gasket 93 is embedded in the gap between the dovetail groove and the dovetail slider 92, and the screw 94 is located between the dovetail slider 92 and the fixed block 91. The screw 94 is rotated to enable the dovetail slider 92 to slide up and down along the fixed block 91. The rear wall plate 7 is fixedly connected to the fixed block 91.

[0023] The stopper 10 is arranged at the bottom of the lifting assembly 9, and is provided with an inverted V-shaped opening 11. The inverted V-shaped opening 11 is located at the bottom of the rear wall plate 7 and extends out of the front wall plate 6. The inverted V-shaped opening 11 is used to clamp and determine the center of the pipe. The lifting assembly 9 drives the stopper 10 to move up and down to fix pipes of different radii.

[0024] The block 10 is provided with left and right opposite mounting holes 12, which are located on both sides of the inverted V-shaped opening 11. The mounting holes 12 are connected with guide shafts 13, which extend out of the mounting holes 12. A needle bearing 14 is installed on the top of the guide shaft 13. Waist grooves 15 are opened on the rod bodies of the clamping rod 1 2 and the clamping rod 2 3. The needle bearing 14 is assembled into the waist groove 15. When the clamping handle is pressed down, the needle bearing 14 rolls along the lower inner wall of the waist groove 15, and at the same time, the outer wall of the needle bearing 14 squeezes the lower inner wall of the waist groove 15, so as to lock the pipeline to prevent it from loosening.

[0025] In order to ensure that the guide shaft 13 can maintain the same plane movement when moving in the waist-shaped groove 15, the top surface of the guide shaft 13 is connected to the limiting plate 16 through a fixing pin. The limiting plate 16 is located below the front wall plate 6. The stop block 10 cooperates with the limiting plate 16 to ensure that the rod bodies of the clamping rod 1 2 and the clamping rod 2 3 maintain the same plane movement.

[0026] The limiting plate 16 is provided with a connecting groove 17 , and the stopper 10 is entirely embedded in the connecting groove 17 of the limiting plate 16 transversely, thereby reducing the overall thickness of the limiting plate 16 to achieve lightweighting of the entire fixture.

[0027] Install the clamp on a welding machine or other equipment that requires pipe clamping, fit the inverted V-shaped opening 11 of the stopper 10 against the pipe surface for preliminary pipe positioning. The inverted V-shaped opening 11 can prevent the pipe from lateral displacement to ensure that the pipes are aligned with each other. Then press down the clamping handle 1, clamp rod 1 2 and clamp rod 2 3 approach each other, and the clamping claws 5 on clamp rod 1 2 and clamp rod 2 3 rest against the pipe surface. Then continue to press down, and the clamping handle 1 locks clamp rod 1 2 and clamp rod 2 3, that is, the entire clamp is locked. During the pressing process, the waist groove 15 moves upward, the needle bearing 14 rolls along the waist groove 15, and the outer wall of the needle bearing 14 squeezes the lower inner wall of the waist groove 15 to lock the pipe to prevent it from loosening.

[0028] In particular, according to different pipe diameters, the dovetail slider 92 and the stopper 10 at the bottom thereof are pre-adjusted to ensure that when the clamp is clamped, the inverted V-shaped opening 11 of the stopper 10 and the inverted V-shaped opening of the clamping jaw 5 always act on the pipe. Therefore, the clamp can clamp pipes of different pipe diameters.

Claims

1. A clamp for pipe clamping, Features include A clamping handle (1), the clamping handle (1) is used to radially lock or release the pipe; Clamping rod one (2) and clamping rod two (3), clamping rod one (2) is directly hinged to the clamping handle (1), clamping rod two (3) is hinged with a transition piece (4), the transition piece (4) and the clamping handle (1) are hinged, and each of the above-mentioned hinges is installed with a pin shaft and the pin shaft is reserved for a certain length; when the clamp is in an open state, the transition piece (4) tilts from the clamping handle (1) to the clamping rod two (3), pressing the clamping handle (1) downward, the clamping rod one (2) and the clamping rod two (3) are close to each other, and the height difference between the two ends of the transition piece (4) is gradually reduced; when the clamp is in a locked state, the hinge point between the clamping rod one (2) and the clamping handle (1), the hinge point between the transition piece (4) and the clamping handle (1), and the hinge point between the transition piece (4) and the clamping rod two (3) are all at the same height; A pair of clamping jaws (5), one of the clamping jaws (5) is hinged to a rod body of clamping rod 1 (2) near the tail end, and the other clamping jaw (5) is hinged to a rod body of clamping rod 2 (3) near the tail end; The front wall plate (6) and the rear wall plate (7) are provided with straight slots (8) for installing the pins at the hinges. The front wall plate (6) and the rear wall plate (7) are used to assemble the clamping handle (1), the first clamping rod (2) and the second clamping rod (3), and keep the clamping handle (1), the first clamping rod (2) and the second clamping rod (3) moving in the same plane. A lifting assembly (9), wherein the rear wall plate (7) is arranged on the lifting assembly (9); A stopper (10) is arranged at the bottom of the lifting assembly (9) and is provided with an inverted V-shaped opening (11). The inverted V-shaped opening (11) is located at the bottom of the rear wall plate (7) and extends out of the front wall plate (6). The inverted V-shaped opening (11) is used to clamp and determine the center of the pipe. The lifting assembly (9) drives the stopper (10) to move up and down to fix pipes with different radii.

2. The clamp for pipe clamping according to claim 1, Features The stopper (10) is provided with mounting holes (12) which are opposite to each other on both sides of the inverted V-shaped opening (11). The mounting holes (12) are connected with guide shafts (13). The guide shafts (13) extend out of the mounting holes (12). A needle bearing (14) is installed on the top of the guide shaft (13). The rod bodies of the clamping rod 1 (2) and the clamping rod 2 (3) are both provided with waist grooves (15). The needle bearing (14) is assembled into the waist grooves (15). When the clamping handle is pressed down, the waist grooves (15) move upwards, and the needle bearing (14) rolls along the lower inner wall of the waist grooves (15). At the same time, the outer wall of the needle bearing (14) presses the lower inner wall of the waist grooves (15), so that the pipeline is locked to prevent it from loosening.

3. The clamp for pipe clamping according to claim 2, Features The top surface of the guide shaft (13) is connected to a limit plate (16) via a fixing pin. The limit plate (16) is located below the front wall plate (6). The stopper (10) cooperates with the limit plate (16) to achieve that the rod bodies of the clamping rod 1 (2) and the clamping rod 2 (3) both maintain the same plane movement.

4. The clamp for pipe clamping according to claim 3, Features A connecting groove (17) is formed on the limiting plate (16), and the stopper (10) is integrally and transversely embedded in the connecting groove (17) of the limiting plate (16).

5. The clamp for pipe clamping according to claim 1, Features The portion of the clamp (5) acting on the pipe is provided with an inverted V-shaped opening, and the distance between the inverted V-shaped opening of the clamp (5) and the inverted V-shaped opening (11) of the stopper (10) and the center of the pipe is consistent, so that the pipe is always locked.

6. The clamp for pipe clamping according to claim 1, Features The lifting assembly (9) comprises a fixed block (91) with a dovetail groove, a dovetail slider (92), a gasket (93) and a screw rod (94); the dovetail slider (92) is embedded in the dovetail groove, the gasket (93) is embedded in the gap between the dovetail groove and the dovetail slider (92), the screw rod (94) is located between the dovetail slider (92) and the fixed block (91), and the screw rod (94) is rotated to enable the dovetail slider (92) to slide up and down along the fixed block (91), and the rear wall plate (7) is fixedly connected to the fixed block (91).

7. The clamp for pipe clamping according to claim 6, Features A connecting column (18) is arranged on the rear wall plate (7), and a groove (19) with a mounting hole (12) is opened on the front wall plate (6). When the front wall plate (6) and the rear wall plate (7) are fixed, the connecting column (18) is embedded in the groove (19).

8. The clamp for pipe clamping according to claim 5, Features The back of the clamping jaw (5) is in contact with the tail end of the clamping rod (2), and the rotation angle of the clamping jaw (5) is limited to achieve adjustment of the clamping jaw (5).

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