Circular pipe butt welding connection center fixing device

Abstract

The utility model provides a round pipe butt welding connection center fixing device which comprises a screw rod, a middle movable round pipe is sleeved in the middle of the screw rod, a first nut seat is installed at one end of the screw rod in a threaded transmission mode, and an end movable round pipe is sleeved at the other end of the screw rod. An adjusting nut used for being matched with the screw rod is arranged on the outer side of the end movable round pipe. A plurality of groups of first shear fork inner support mechanisms are circumferentially and uniformly arranged between the first nut seat and the middle movable round pipe; and a plurality of groups of second shear fork inner support mechanisms are circumferentially and uniformly arranged between the middle movable round pipe and the end movable round pipe. Pipe butt joint errors can be reduced in the pipe connecting work, the pipe connecting quality is ensured, meanwhile, the device is suitable for butt welding connection work of pipes with different pipe diameters, and the working efficiency is improved. The device can stretch and unfold, is convenient to carry, and can be suitable for butt welding connection work of circular pipes with different pipe diameters by adjusting the unfolding degree of the front end structure and the rear end structure.

Description

Technical Field

[0001] The utility model relates to the technical field of round pipe welding tooling, in particular to a center fixing device for butt-welding connection of round pipes. Background Art

[0002] During the installation of circular pipes, connecting fixed and loose pipes, fixed pipes and flanges, and pipes and reducers can be difficult to secure, with large errors and uncontrolled errors, all of which can easily lead to quality issues. Improving connection efficiency while ensuring quality and protecting the pipes is challenging. To ensure quality and improve efficiency, a center fixture has been designed specifically for butt welding circular pipes. Utility Model Content

[0003] To address existing technical issues, the primary purpose of this utility model is to provide a center-fixing device for butt-welding circular pipes. This device reduces pipe butt-welding errors during pipe joining, ensuring pipe connection quality while also being adaptable to butt-welding pipes of varying diameters and improving work efficiency. The device is telescopic and portable, and by adjusting the degree of expansion of the front and rear end structures, it can be adapted to butt-weld circular pipes of varying diameters.

[0004] In order to achieve the above technical features, the purpose of the utility model is achieved as follows: a central fixing device for butt-welding a circular pipe, comprising a screw, a middle movable circular tube is sleeved on the middle part of the screw, a first nut seat is installed on one end of the screw through threaded transmission, and an end movable circular tube is sleeved on the other end of the screw, and an adjusting nut for cooperating with the screw is provided on the outer side of the end movable circular tube;

[0005] A plurality of first scissor-type internal support mechanisms are evenly arranged circumferentially between the first nut seat and the middle movable circular tube;

[0006] A plurality of second scissor-type inner supporting mechanisms are evenly arranged in a circumference between the middle movable circular tube and the end movable circular tube.

[0007] The end of the screw is provided with a rotating disk.

[0008] A rotating handle is fixed on the outer wall of the adjusting nut.

[0009] The first scissors-type internal support mechanism includes a first connecting rod hinged on the outer wall of the first nut seat and a second connecting rod hinged on the outer wall of the middle movable circular tube. The middle parts of the first connecting rod and the second connecting rod are hingedly connected by a first pin shaft; the other end of the first connecting rod is hinged on the tail of the first horizontal rod, and the other end of the second connecting rod is slidably matched with the first sliding groove through a sliding pin, and the first sliding groove is set on the first horizontal rod.

[0010] The second scissors-type internal support mechanism includes a third connecting rod hinged on the outer wall of the middle movable circular tube and a fourth connecting rod hinged on the outer wall of the end movable circular tube. The middle parts of the third connecting rod and the fourth connecting rod are hingedly connected by a second pin shaft; the other end of the third connecting rod is hinged on the tail of the second horizontal rod, and the other end of the fourth connecting rod forms a sliding fit with the second slide groove through a sliding pin, and the second slide groove is set on the second horizontal rod.

[0011] The first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are all cut from steel plates and are respectively provided in two groups arranged symmetrically.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model provides a circular pipe butt welding connection center fixing device, which can reduce the pipe butt welding error during pipe connection work, ensure the quality of pipe connection, and is suitable for butt welding connection work of pipes of different diameters, thereby improving work efficiency.

[0014] 2. The device can be extended and expanded, making it easy to carry. By adjusting the degree of expansion of the front and rear end structures, it can be used for butt welding of circular pipes of different diameters, thus creating good economic benefits.

[0015] 3. By adopting the utility model, the adjusting nut can be conveniently rotated through the rotating handle, and then the corresponding end movable round tube can be pushed to move through the adjusting nut.

[0016] 4. The first scissor-type internal support mechanism can be used to support the inside of the circular tube to be connected, thereby providing central support for the circular tube to ensure that the circular tube to be connected and the screw are arranged concentrically.

[0017] 5. The second scissor-type internal support mechanism can be used to support the inside of the circular tube to be connected, thereby providing central support for the circular tube to ensure that the circular tube to be connected and the screw are arranged concentrically. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a state diagram of the utility model when connecting equal-diameter circular pipes.

[0020] Figure 2 This is a state diagram of the utility model when a round pipe and a flange pipe are butt-jointed.

[0021] Figure 3 This is a state diagram of the utility model when connecting round pipes with different diameters.

[0022] Figure 4 It is a side view of the utility model.

[0023] Figure 5 This is a partial enlarged view of the first nut seat, the middle movable circular tube and the end movable circular tube of the utility model respectively cooperating with the screw.

[0024] In the figure: first round tube 1, second round tube 2, first horizontal rod 3, first chute 4, first connecting rod 5, first pin 6, second connecting rod 7, first nut seat 8, middle movable round tube 9, first scissors-type internal support mechanism 10, second scissors-type internal support mechanism 11, third connecting rod 12, second pin 13, fourth connecting rod 14, second chute 15, second horizontal rod 16, end movable round tube 17, rotating handle 18, adjusting nut 19, screw 20, rotating disk 21, flange tube 22, and reducer 23. DETAILED DESCRIPTION

[0025] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] Reference Figure 1-5 A central fixing device for butt-welding a circular pipe comprises a screw 20, wherein the middle portion of the screw 20 is fitted with a middle movable circular pipe 9, one end of the screw 20 is fitted with a first nut seat 8 via threaded transmission, and the other end of the screw 20 is fitted with an end movable circular pipe 17, and an adjusting nut 19 for cooperating with the screw 20 is provided on the outer side of the end movable circular pipe 17; a plurality of groups of first scissor-type internal support mechanisms 10 are evenly arranged in a circumferential manner between the first nut seat 8 and the middle movable circular pipe 9; a plurality of groups of second scissor-type internal support mechanisms 11 are evenly arranged in a circumferential manner between the middle movable circular pipe 9 and the end movable circular pipe 17. By adopting the above-mentioned fixing device, the pipe docking error can be reduced during the pipe connection work, ensuring the pipe connection quality while being applicable to the butt-welding connection of pipes of different diameters, thereby improving work efficiency. During the specific docking process, the first scissors-type internal support mechanism 10 and the second scissors-type internal support mechanism 11 are respectively supported between the first circular tube 1 and the second circular tube 2 to be docked, and the concentric arrangement structure of the two can ensure the concentric docking arrangement between the first circular tube 1 and the second circular tube 2.

[0027] Furthermore, a rotating disk 21 is provided at the end of the screw rod 20. By adopting the rotating disk 21, the screw rod 20 is easily rotated, and the corresponding first nut seat 8 is driven to rotate by the screw rod 20, thereby providing the opening control of the corresponding first scissors fork inner support mechanism 10.

[0028] Furthermore, a rotating handle 18 is fixed on the outer wall of the adjusting nut 19. The adjusting nut 19 can be easily rotated by the rotating handle 18, and then the corresponding end movable tube 17 is pushed to move by the adjusting nut 19.

[0029] Furthermore, the first scissor-type internal support mechanism 10 includes a first connecting rod 5 hinged on the outer wall of the first nut seat 8 and a second connecting rod 7 hinged on the outer wall of the middle movable circular tube 9. The middle parts of the first connecting rod 5 and the second connecting rod 7 are hingedly connected by a first pin 6; the other end of the first connecting rod 5 is hinged on the tail of the first horizontal rod 3, and the other end of the second connecting rod 7 is in sliding cooperation with the first slide 4 through a sliding pin, and the first slide 4 is set on the first horizontal rod 3. The above-mentioned first scissor-type internal support mechanism 10 can be used to support the inside of the circular tube to be connected, thereby providing central support for the circular tube to ensure that the circular tube to be connected is concentrically arranged with the screw 20. In the specific opening and adjustment process, by rotating the screw 20, the first nut seat 8 is driven by the screw 20, and the corresponding first connecting rod 5 and second connecting rod 7 are driven to open or close through the first nut seat 8, thereby achieving the purpose of providing internal support for the circular tube to be connected.

[0030] Furthermore, the second scissor-type internal support mechanism 11 includes a third link 12 hinged on the outer wall of the middle movable circular tube 9 and a fourth link 14 hinged on the outer wall of the end movable circular tube 17. The middle parts of the third link 12 and the fourth link 14 are hingedly connected by a second pin 13; the other end of the third link 12 is hinged on the tail of the second horizontal rod 16, and the other end of the fourth link 14 is slidably matched with the second slide 15 through a sliding pin, and the second slide 15 is set on the second horizontal rod 16. The above-mentioned second scissor-type internal support mechanism 11 can be used to support the inside of the circular tube to be connected, thereby providing central support for the circular tube to be connected, so as to ensure that the circular tube to be connected is arranged concentrically with the screw 20. In the specific opening and adjustment process, by rotating the adjusting nut 19, the end movable circular tube 17 is driven to slide by the adjusting nut 19, and the corresponding third link 12 and fourth link 14 are driven to open or close by the end movable circular tube 17, thereby achieving the purpose of providing internal support for the circular tube to be connected.

[0031] Furthermore, the first connecting rod 5, second connecting rod 7, third connecting rod 12, and fourth connecting rod 14 are all cut from steel plates and arranged in two symmetrical groups. Using these materials simplifies the manufacturing process and reduces production costs. Furthermore, the symmetrical arrangement ensures structural stability.

[0032] Working process and principle of this utility model:

[0033] See also Figure 1 During the docking process between the first round tube 1 and the second round tube 2 of the same inner diameter, the first scissor-type internal support mechanism 10 and the second scissor-type internal support mechanism 11 are supported inside the first round tube 1 and the second round tube 2 respectively, thereby ensuring that the centers of the first round tube 1 and the second round tube 2 maintain a coaxial arrangement structure with the screw 20. After the concentric docking of the two is completed, the two are welded to achieve reliable docking of the two.

[0034] See also Figure 2 During the docking process between the second round tube 2 and the flange tube 22, the first scissor-type internal support mechanism 10 and the second scissor-type internal support mechanism 11 are supported inside the second round tube 2 and the flange tube 22 respectively, thereby ensuring that the centers of the second round tube 2 and the flange tube 22 maintain a coaxial arrangement structure with the screw 20. After the concentric docking of the two is completed, the two are welded to achieve reliable docking between the two.

[0035] See also Figure 3 During the docking process of the second round tube 2 and the reducer 23, the first scissor-type internal support mechanism 10 and the second scissor-type internal support mechanism 11 are respectively supported inside the second round tube 2 and the flange tube 22, thereby ensuring that the center of the second round tube 2 and the reducer 23 maintains a coaxial arrangement structure with the screw 20. After the concentric docking of the two is completed, the two are welded to achieve reliable docking of the two.

Claims

1. A center fixing device for butt welding of circular pipes, characterized in that: The invention comprises a screw rod (20), wherein the middle portion of the screw rod (20) is provided with a middle movable circular tube (9), one end of the screw rod (20) is provided with a first nut seat (8) through thread transmission, the other end of the screw rod (20) is provided with an end movable circular tube (17), and an adjusting nut (19) for cooperating with the screw rod (20) is provided on the outer side of the end movable circular tube (17); Multiple groups of first scissor-type internal support mechanisms (10) are evenly arranged in a circumferential pattern between the first nut seat (8) and the middle movable circular tube (9); Multiple groups of second scissor-type internal support mechanisms (11) are evenly arranged in a circumferential pattern between the middle movable circular tube (9) and the end movable circular tube (17).

2. A center fixing device for butt welding of circular pipes according to claim 1, characterized in that: The end of the screw (20) is provided with a rotating disk (21).

3. A center fixing device for butt welding of circular pipes according to claim 1, characterized in that: A rotating handle (18) is fixed on the outer wall of the adjusting nut (19).

4. A center fixing device for butt welding of circular pipes according to claim 1, characterized in that: The first scissor-type internal support mechanism (10) comprises a first connecting rod (5) hinged on the outer wall of the first nut seat (8) and a second connecting rod (7) hinged on the outer wall of the middle movable circular tube (9), wherein the middle parts of the first connecting rod (5) and the second connecting rod (7) are hingedly connected via a first pin shaft (6); the other end of the first connecting rod (5) is hinged to the tail of the first horizontal rod (3), and the other end of the second connecting rod (7) is slidably matched with the first sliding groove (4) via a sliding pin, and the first sliding groove (4) is provided on the first horizontal rod (3).

5. A center fixing device for butt welding of circular pipes according to claim 4, characterized in that: The second scissor-type internal support mechanism (11) includes a third connecting rod (12) hinged on the outer wall of the middle movable circular tube (9) and a fourth connecting rod (14) hinged on the outer wall of the end movable circular tube (17), and the middle parts of the third connecting rod (12) and the fourth connecting rod (14) are hingedly connected by a second pin shaft (13); the other end of the third connecting rod (12) is hinged to the tail of the second horizontal rod (16), and the other end of the fourth connecting rod (14) is slidably matched with the second slide groove (15) through a sliding pin, and the second slide groove (15) is set on the second horizontal rod (16).

6. A center fixing device for butt welding of circular pipes according to claim 5, characterized in that: The first connecting rod (5), the second connecting rod (7), the third connecting rod (12) and the fourth connecting rod (14) are all cut from steel plates and are respectively arranged in two groups symmetrically.

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