Longitudinal seam welding reversible deformation control device for large-diameter pressure steel pipe

Abstract

The utility model relates to the field of pressure steel pipe welding devices, and discloses a large-diameter pressure steel pipe longitudinal seam welding reversible deformation control device which comprises two vertical supports fixed to the ground through embedded ribs, a horizontal installation plate is fixed to the tops of the vertical supports, and movable supports are hinged to the two sides of the other end of the horizontal installation plate. The bottom end of the movable support is detachably connected with a fixed plate on the ground; the welding roller carrier is arranged on the ground below the horizontal mounting plate; the top jacking oil cylinder is arranged on the upper surface of the horizontal mounting plate; and the two bottom jacking oil cylinders are fixed in the middle of the welding wheel rolling frame. The device is simple in structure, the two functions of free of inner supporting during longitudinal seam welding of the steel pipe and reversible deformation control during longitudinal seam welding can be achieved through cooperation of the top jacking oil cylinder, the bottom jacking oil cylinder and the welding roller frame, the welding efficiency is effectively improved, meanwhile, the construction cost is reduced, and the safety risk is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of pressure steel pipe welding devices, in particular to a large-diameter pressure steel pipe longitudinal seam welding anti-deformation control device. Background Art

[0002] Penstocks are an important component of water conservancy and hydropower engineering construction. They generally have to withstand high water pressure, and their manufacturing and installation quality directly affects the operating status and safety of the hydropower station.

[0003] The penstock production unit of a hydropower station is usually made of two tiles (half a circle) that are joined together into a full circle in the production plant, and the longitudinal seam is welded using submerged arc welding. In order to prevent deformation during longitudinal seam welding, it is usually necessary to rigidly support the inner wall of the steel pipe before longitudinal seam welding, and frequently rotate the steel pipe, and cross-weld the longitudinal seam inside and outside to achieve the purpose of controlling welding deformation. This will result in a long welding time, complicated procedures, high labor intensity for workers, and high construction costs.

[0004] To this end, a large-diameter pressure steel pipe longitudinal seam welding anti-deformation control device is proposed to reduce the pressure steel pipe longitudinal seam welding deformation, eliminate the internal support of the steel pipe and the frequent steel pipe rotation and longitudinal seam welding after correction process, improve the construction quality, and shorten the construction period. Utility Model Content

[0005] The technical problem solved by the utility model is that in order to prevent deformation of the longitudinal seam welding, the existing pressure steel pipe manufacturing process requires steel bar support and the steel pipe needs to be rotated frequently during the welding process. The cross welding inside and outside the longitudinal seam leads to complicated procedures, high labor intensity and high construction costs.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows:

[0007] A large diameter pressure steel pipe longitudinal seam welding anti-deformation control device, comprising two vertical supports fixed to the ground through embedded ribs, a horizontal mounting plate fixed to the top of the vertical supports, and movable supports hinged on both sides of the other end of the horizontal mounting plate, and the bottom end of the movable support is detachably connected to the fixed plate on the ground;

[0008] It also includes a welding roller frame arranged on the ground below the horizontal mounting plate;

[0009] It also includes a top lifting cylinder arranged on the upper surface of the horizontal mounting plate;

[0010] It also includes two bottom lifting cylinders fixed on the middle part of the welding wheel roller frame.

[0011] Particularly, the horizontal mounting plate is also fixedly connected to an oblique brace at the end of one end of the vertical brace, and the bottom of the oblique brace is also fixed to the ground by embedded reinforcement.

[0012] Furthermore, the embedded reinforcement is an L-shaped steel bar with two bottom cross bars arranged facing or back to back, and an embedded plate is provided on the top of the L-shaped steel bar. The upper surface of the embedded plate is flush with the ground, and the diagonal support rod and the bottom of the vertical support are fixedly connected to the embedded plate.

[0013] Particularly, a connecting plate perpendicular to the axis of the movable support is provided at the bottom of the movable support, and matching bolting holes are provided on the connecting plate and the fixing plate on the ground, and positioning bolts are screwed into the bolting holes.

[0014] Particularly, outer walls of the top lifting cylinder and the bottom lifting cylinder are both provided with inclined reinforcing ribs.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects: the utility model has a simple device structure, and can achieve two functions of no internal support during steel pipe longitudinal seam welding and anti-deformation control during longitudinal seam welding through the cooperation between the top lifting cylinder, the bottom lifting cylinder and the welding roller frame, which effectively improves the welding efficiency while reducing the construction cost, and greatly reduces the safety risk, with high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0017] Figure 2 It is a side structural schematic diagram of the utility model.

[0018] The meanings of the numbers in the figure are: embedded reinforcement—1; vertical support—2; horizontal mounting plate—3; movable support—4; fixed plate—5; welding roller frame—6; top lifting cylinder—7; bottom lifting cylinder—8; diagonal support rod—9; embedded plate—10; connecting plate—11; positioning bolt—12; reinforcing rib—13. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0020] like Figure 1 and Figure 2As shown, a large-diameter pressure steel pipe longitudinal seam welding anti-deformation control device comprises two vertical supports 2 fixed to the ground through embedded ribs 1, a horizontal mounting plate 3 is fixed to the top of the vertical supports 2, and movable supports 4 are hinged on both sides of the other end of the horizontal mounting plate 3, and the bottom end of the movable support 4 is detachably connected to a fixed plate 5 on the ground;

[0021] It also includes a welding roller frame 6 arranged on the ground below the horizontal mounting plate 3;

[0022] It also includes a top lifting cylinder 7 arranged on the upper surface of the horizontal mounting plate 3;

[0023] It also includes two bottom lifting cylinders 8 fixed to the middle of the welding roller frame 6.

[0024] In the utility model, the main working process is as follows: first, remove the connection between the bottom end of the movable support 4 and the fixed plate 5 to restore the movable support 4 to an active state, then lift the movable support 4, use the gantry crane to lift the assembled pressure steel pipe, insert it into the L-shaped space formed by the vertical support 2 and the horizontal mounting plate 3, and place it on the welding roller frame 6, restore the fixed connection between the movable support 4 and the fixed plate 5, so as to provide stable support for the horizontal mounting plate 3 above. Then rotate the pressure steel pipe by the welding roller frame 6 to ensure that the two longitudinal seams are on the vertical plane. Measure the required anti-deformation reserve in the free state of the pressure steel pipe, start the pump station to make the top lifting cylinder 7 lift upward to contact with the inner wall of the pressure steel pipe, thereby completing the anti-deformation control. The lifting and lowering of the two bottom lifting cylinders 8 in the middle of the welding roller frame 6 can achieve the purpose of lifting the pressure steel pipe.

[0025] As a preferred embodiment, the horizontal mounting plate 3 is further fixedly connected to a diagonal brace rod 9 at the end of one end of the vertical brace 2 , and the bottom of the diagonal brace rod 9 is also fixed to the ground through the embedded reinforcement 1 .

[0026] In this embodiment, a structure is provided for strengthening the supporting strength of the horizontal mounting plate 3 , and the bottom of the diagonal support rod 9 is also fixed to the ground by the embedded reinforcement 1 , which can cooperate with the vertical support 2 to achieve unilateral support for the horizontal mounting plate 3 .

[0027] As a further embodiment, the embedded reinforcement 1 is an L-shaped steel bar with two bottom cross bars arranged facing or back to back, and an embedded plate 10 is provided on the top of the L-shaped steel bar. The upper surface of the embedded plate 10 is flush with the ground, and the bottom of the diagonal support rod 9 and the vertical support 2 are fixedly connected to the embedded plate 10.

[0028] In this embodiment, a specific structure of embedded reinforcement 1 is provided, and embedded plate 10 is used as a connection piece with vertical support 2 and diagonal support rod 9, and its upper surface is flush with the ground. Two bottom cross bars are arranged facing or back to back and embedded in concrete, which can effectively enhance the force and prevent the upper vertical support 2 and diagonal support rod 9 from deflecting or shaking.

[0029] As a preferred embodiment, a connecting plate 11 axially perpendicular to the movable support 4 is provided at the bottom of the movable support 4, and matching bolting holes are provided on the connecting plate 11 and the fixed plate 5 on the ground, and positioning bolts 12 are screwed into the bolting holes.

[0030] In the embodiment, a specific detachable connection mode of the movable support 4 is provided. The connecting plate 11 is perpendicular to the axis of the movable support 4, and its overall size is slightly larger than that of the movable support 4, so as to avoid scratching or colliding with the fixed plate 5 when the movable support 4 rotates.

[0031] As a preferred embodiment, the outer walls of the top lifting cylinder 7 and the bottom lifting cylinder 8 are both provided with inclined reinforcing ribs 13 .

[0032] In this embodiment, the reinforcing ribs 13 are provided to ensure the overall verticality of the top lifting cylinder 7 and the bottom lifting cylinder 8 to avoid deflection.

[0033] The words “connection” and “fixation” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0034] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A large diameter pressure steel pipe longitudinal seam welding anti-deformation control device, characterized in that: It comprises two vertical supports (2) fixed to the ground via embedded ribs (1), a horizontal mounting plate (3) being fixed to the top of the vertical supports (2), and movable supports (4) being hingedly connected to both sides of the other end of the horizontal mounting plate (3), and the bottom end of the movable support (4) being detachably connected to a fixed plate (5) on the ground; It also includes a welding roller frame (6) arranged on the ground below the horizontal mounting plate (3); It also includes a top lifting cylinder (7) arranged on the upper surface of the horizontal mounting plate (3); It also includes two bottom lifting cylinders (8) fixed to the middle of the welding roller frame (6).

2. A large diameter pressure steel pipe longitudinal seam welding anti-deformation control device as claimed in claim 1, characterized in that: The horizontal mounting plate (3) is also fixedly connected to an oblique support rod (9) at the end of one end of the vertical support (2), and the bottom of the oblique support rod (9) is also fixed to the ground through embedded reinforcement (1).

3. A large diameter pressure steel pipe longitudinal seam welding anti-deformation control device as claimed in claim 2, characterized in that: The embedded reinforcement (1) is an L-shaped reinforcement with two bottom cross bars arranged facing each other or facing away from each other. An embedded plate (10) is provided on the top of the L-shaped reinforcement. The upper surface of the embedded plate (10) is flush with the ground. The bottoms of the diagonal bracing rods (9) and the vertical bracing rods (2) are fixedly connected to the embedded plate (10).

4. A large diameter pressure steel pipe longitudinal seam welding anti-deformation control device as claimed in claim 1, characterized in that: A connecting plate (11) axially perpendicular to the movable support (4) is provided at the bottom of the movable support (4), and matching bolt holes are provided on the connecting plate (11) and the fixing plate (5) on the ground, wherein positioning bolts (12) are screwed into the bolt holes.

5. The large diameter pressure steel pipe longitudinal seam welding anti-deformation control device according to claim 1, characterized in that: The outer walls of the top lifting cylinder (7) and the bottom lifting cylinder (8) are both provided with inclined reinforcing ribs (13).

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