A precise welding device and construction method for locking longitudinal seams between small-diameter pipe curtain pipes

Abstract

The present invention relates to a precise welding device for longitudinal seams of lock buckles between pipes of a small-diameter pipe curtain, comprising: a traveling motor, roller groups are respectively arranged on both sides of the traveling motor, the roller groups comprise a fixed groove roller arranged on the left side of the traveling motor and a free groove roller arranged on the right side of the traveling motor, the fixed groove roller and the free groove roller are respectively connected to the output end of the traveling motor through roller shafts, the traveling motor is connected to a spring base, the spring base is connected to a welding gun, and the welding gun is connected to the welding machine through a welding machine pipeline group. The precise welding device of the present invention can automatically adapt to irregular changes in the operating space in the lock buckle, overcomes the difficulties of complex longitudinal linear changes in the pipe curtain structure and narrow operating space between curtain pipes, realizes precise welding of the longitudinal seams in the lock buckle of the curved pipe curtain structure, and effectively improves the lateral rigidity and integrity of the pipe curtain structure.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering and relates to a precise welding device and a construction method for locking longitudinal seams between pipes of a small-diameter pipe curtain. Background Art

[0002] In urban environments, when tunnels pass through existing tunnels, railways, ground buildings, monuments and other sensitive structures, pipe-curtain structures are often used as pre-support, and then dark excavation construction is carried out under the protection of the pipe-curtain structure. Multiple curtain pipes (usually prefabricated steel pipes) are pushed in sequence at specific positions, and then connected into a specific form of pipe-curtain pre-support structure through auxiliary measures such as grouting inside the curtain pipes (and between the curtain pipes).

[0003] The pipe curtain structure is composed of multiple curtain tubes that are pushed in sequentially and connected by locks. Therefore, the lateral stiffness (lateral integrity) of the pipe curtain structure is much smaller than the longitudinal one. Strengthening the lateral stiffness and integrity of the pipe curtain structure is of great significance to improving its bearing capacity and pre-reinforcement effect. A conventional idea to strengthen the lateral stiffness and integrity of the pipe curtain structure is to weld the longitudinal seams of the locks between the curtain tubes. Patent CN104028926A uses a guide device to achieve one-time welding of the longitudinal seams inside the straight steel pipe, overcoming the difficulty of manual entry into the steel pipe for welding. Patents CN207606390U and CN201519834U use a robotic arm to send the welding gun into the steel pipe, which is only suitable for welding the longitudinal seams inside short steel pipes.

[0004] In engineering practice, the longitudinal length of the pipe curtain structure is generally more than 40m, and it usually changes in a curved (even irregular) curve along the longitudinal direction. At the same time, the operating space between each curtain tube is narrow. To achieve precise welding of the locking longitudinal seams between curtain tubes is a challenging problem. At present, there is no report on related technology in domestic and foreign literature. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to address the problems of limited internal space and difficult lateral connection of small-diameter curtain tubes, the present invention provides a precise welding device and construction method for the locking longitudinal seams between small-diameter tube curtain tubes. By adapting to changes in the operating space of the welding trolley, the engineering difficulties of complex longitudinal linear changes in the tube curtain structure and narrow operating space between the curtain tubes are overcome, and the precise welding of the locking longitudinal seams between the curtain tubes is effectively completed; then, concrete is used to fill the curtain tubes and the gaps between the curtain tubes to form an overall tube curtain structure, effectively improving the lateral stability and overall stability of the tube curtain structure.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] A precision welding device for locking longitudinal seams between small-diameter pipe curtains, comprising: a traveling motor, roller groups are respectively provided on both sides of the traveling motor, the roller groups include a fixed groove roller arranged on the left side of the traveling motor and a free groove roller arranged on the right side of the traveling motor, the fixed groove roller and the free groove roller are respectively connected to the output end of the traveling motor through roller shafts, the traveling motor drives the roller shaft to work, and the roller shaft drives the fixed groove roller and the free groove roller to work respectively, so that the precision welding device can move forward along the fixed guide groove and the free guide groove; the traveling motor is connected to a spring base, the spring base is connected to a welding gun, and the welding gun is connected to the welding machine through a welding machine pipeline group.

[0010] Furthermore, a U-shaped frame is connected to the spring base, and a U-shaped frame roller is connected to the top of the U-shaped frame.

[0011] Furthermore, the small-diameter pipe curtain includes a steel pipe, and the left outer wall and the right outer wall of the steel pipe are respectively connected with a sub-buckle and a female buckle. When multiple steel pipes are connected in sequence, adjacent sub-buckles and female buckles are matched and connected to form a locking buckle longitudinal seam; the left outer wall and the right outer wall of the steel pipe are respectively provided with a fixed guide groove and a free guide groove; when the precision welding device is located in the steel pipe, the fixed groove roller cooperates with the fixed guide groove, and the free groove roller cooperates with the free guide groove.

[0012] A construction method of a precision welding device for locking longitudinal seams between small-diameter pipe curtain pipes, characterized in that the specific steps are as follows:

[0013] Step S1, setting up a pipe curtain machine in the starting working pit, marking the predetermined position of each pipe curtain on the side wall of the starting working pit; the pipe curtain machine pushes in a preset number of steel pipes section by section and welds them to complete the curtain pipe construction;

[0014] Step S2, according to step S1, a preset number of curtain tubes are pushed in sequence according to the predetermined positions, and adjacent curtain tubes are engaged and positioned by means of sub-buckles and female buckles, so as to form a pipe-curtain pre-support structure with an arched cross section in the stratum; after all curtain tubes are pushed in, the soil between adjacent curtain tubes is cleaned, and the gaps between the curtain tubes are cleaned to facilitate the subsequent welding of the longitudinal seams of the locking buckles between the curtain tubes;

[0015] Step S3, the precision welding device starts from the working pit end, and moves slowly along the fixed guide groove and the free guide groove under the drive of the traveling motor, and starts the welding machine at the same time to weld the longitudinal seam of the lock buckle formed by the matching connection of the sub-buckle and the mother buckle, until the precision welding device is received from the other working pit end, and the overhead welding of the longitudinal seam of the lock buckle between the curtain pipes is completed;

[0016] Step S4, turn over the precision welding device, repeat the work of step S3, and complete the top welding of the locking buckle longitudinal seam between the curtain tubes;

[0017] Step S5, repeating steps S3 and S4, and completing the precise welding of the locking longitudinal seams between all curtain tubes in sequence;

[0018] Step S6: grouting is performed to fill the spaces inside and between the curtain tubes to form an integral tube-curtain structure with greater lateral rigidity.

[0019] (III) Beneficial effects

[0020] The beneficial effects of the present invention are as follows: the precise welding device can automatically adapt to the irregular changes of the operating space inside the lock, overcome the difficulties of complex longitudinal linear changes in the pipe curtain structure and narrow operating space between curtain pipes, realize the precise welding of the longitudinal seams inside the lock of the curved pipe curtain structure, and effectively improve the lateral stiffness and integrity of the pipe curtain structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a small-diameter tube curtain structure according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a precision welding device according to an embodiment of the present invention;

[0023] Figure 3 This is a usage state diagram of a precision welding device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0025] An embodiment of the present invention provides a precise welding device for locking longitudinal seams between small-diameter pipe curtain pipes, such as Figure 2 As shown, it includes: a traveling motor 25, and roller groups are respectively arranged on both sides of the traveling motor 25, and the roller groups include a fixed groove roller 27 arranged on the left side of the traveling motor 25 and a free groove roller 28 arranged on the right side of the traveling motor 25, and the fixed groove roller 27 and the free groove roller 28 are respectively connected to the output end of the traveling motor 25 through a roller shaft 26, and the traveling motor 25 drives the roller shaft 26 to work, and the roller shaft 26 drives the fixed groove roller 27 and the free groove roller 28 to work respectively, so that the precision welding device can move forward along the fixed guide groove 14 and the free guide groove 15; the traveling motor 25 is connected to a spring base 22, and the spring base 22 is connected to a welding gun 21, and the welding gun 21 is connected to the welding machine 3 through a welding machine pipeline group 9.

[0026] Furthermore, a U-shaped frame 23 is connected to the spring base 22 , and a U-shaped frame roller 24 is connected to the top of the U-shaped frame 23 . The U-shaped frame roller 24 cooperates with the inner wall of the steel pipe 11 to facilitate overall movement.

[0027] Among them, the small-diameter pipe curtain 1 includes a steel pipe 11, and the left outer wall and the right outer wall of the steel pipe 11 are respectively connected with a sub-buckle 13 and a female buckle 12. When multiple steel pipes 11 are connected in sequence, the adjacent sub-buckles 13 and female buckles 12 are matched and connected to form a locking longitudinal seam; the left outer wall and the right outer wall of the steel pipe 11 are respectively provided with a fixed guide groove 14 and a free guide groove 15; when the precision welding device is located in the steel pipe 11, the fixed groove roller 27 cooperates with the fixed guide groove 14, and the free groove roller 28 cooperates with the free guide groove 15.

[0028] A construction method for a precision welding device for locking longitudinal seams between small-diameter pipe curtain pipes, such as Figure 1 , Figure 2 , Figure 3 As shown, the specific steps are as follows:

[0029] Step S1, set up a pipe curtain machine in the starting working pit, and mark the predetermined position of each pipe curtain on the side wall of the starting working pit; the pipe curtain machine pushes in 15 sections of steel pipes section by section and welds them, completing the construction of the first curtain pipe with a length of 60m;

[0030] Step S2, according to step S1, 13 curtain tubes are pushed forward in sequence according to the predetermined positions, and the adjacent curtain tubes are positioned by engaging the sub-buckles 13 and the female buckles 12, so as to form a pipe curtain pre-support structure with an arched cross section in the stratum; after all the curtain tubes are pushed forward, the soil between the adjacent curtain tubes is cleaned, and the gaps between the curtain tubes are cleaned to facilitate the subsequent welding of the longitudinal seams of the locking buckles between the curtain tubes;

[0031] Step S3, the precision welding device 2 starts from the working pit end, and moves slowly along the fixed guide groove 14 and the free guide groove 15 under the drive of the traveling motor 25, and starts the welding machine 3 at the same time, and welds the longitudinal seam of the lock buckle formed by the matching connection of the sub buckle 13 and the mother buckle 12, until the precision welding device 2 is received from the other working pit end, and the overhead welding of the longitudinal seam of the lock buckle between the curtain pipes is completed;

[0032] Due to the complex longitudinal line shape of the tube curtain structure, when the height of the operating space in the lock buckle changes irregularly, the height of the welding gun 21 is adjusted through the spring base 22, and the vertical distance between the welding gun and the longitudinal seam is kept unchanged through the limiting effect of the U-shaped frame 23 and the U-shaped frame roller 24 on the spring base. When the width of the operating space in the lock buckle changes irregularly, the fixed groove roller 27 moves in the fixed guide groove 14 to keep the horizontal distance between the welding gun 3 and the longitudinal seam of the lock buckle unchanged, and the free groove roller 28 moves on the free guide groove 15, which can automatically adapt to the irregular changes in the width of the operating space to a certain extent;

[0033] Step S4, turn over the precision welding device 2, repeat the work of step S3, and complete the top welding of the locking buckle longitudinal seam between the curtain tubes;

[0034] Step S5, repeating steps S3 and S4, and completing the precise welding of the locking longitudinal seams between all curtain tubes in sequence. When the number of curtain tubes is large, multiple welding machines can work synchronously to improve work efficiency.

[0035] Step S6: grouting is performed to fill the spaces inside and between the curtain tubes to form an integral tube-curtain structure with greater lateral rigidity.

[0036] The precise welding device of the present invention can automatically adapt to irregular changes in the operating space inside the lock buckle, overcomes the difficulties of complex longitudinal linear changes in the pipe-curtain structure and narrow operating space between curtain pipes, realizes precise welding of the longitudinal seams inside the lock buckle of the curved pipe-curtain structure, and effectively improves the lateral stiffness and integrity of the pipe-curtain structure.

[0037] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A construction method for a precision welding device for locking longitudinal seams between small-diameter pipe curtain pipes, characterized in that: The precision welding device comprises: a traveling motor (25), wherein roller groups are respectively arranged on both sides of the traveling motor (25), wherein the roller groups comprise a fixed groove roller (27) arranged on the left side of the traveling motor (25) and a free groove roller (28) arranged on the right side of the traveling motor (25), wherein the fixed groove roller (27) and the free groove roller (28) are respectively connected to the output end of the traveling motor (25) via a roller shaft (26), wherein the traveling motor (25) drives the roller shaft (26) to work, and the roller shaft (26) drives the fixed groove roller (27) and the free groove roller (28) to work, respectively, so that the precision welding device can move forward along the fixed guide groove (14) and the free guide groove (15); wherein the traveling motor (25) is connected to a spring base (22), wherein the spring base (22) is connected to a welding gun (21), and wherein the welding gun (21) is connected to a welding machine (3) via a welding machine pipeline group (9); The small-diameter tube curtain (1) comprises a steel tube (11), the left outer wall and the right outer wall of the steel tube (11) are respectively connected with a sub-buckle (13) and a female buckle (12), and when a plurality of steel tubes (11) are connected in sequence, adjacent sub-buckles (13) and female buckles (12) are matched and connected to form a locking buckle longitudinal seam; the left outer wall and the right outer wall of the steel tube (11) are respectively provided with a fixed guide groove (14) and a free guide groove (15); when the precision welding device is located in the steel tube (11), the fixed groove roller (27) is matched with the fixed guide groove (14), and the free groove roller (28) is matched with the free guide groove (15); The construction method of the precision welding device has the following specific steps: Step S1, setting up a pipe curtain machine in the starting working pit, marking the predetermined position of each pipe curtain on the side wall of the starting working pit; the pipe curtain machine pushes in a preset number of steel pipes section by section and welds them to complete the curtain pipe construction; Step S2, according to step S1, a preset number of root curtain tubes are pushed forward in sequence according to the predetermined positions, and adjacent curtain tubes are engaged and positioned by means of the sub-buckles (13) and the female buckles (12), so as to form a pipe curtain pre-support structure with an arched cross section in the stratum; after all curtain tubes are pushed forward, the soil between adjacent curtain tubes is cleaned, and the gaps between the curtain tubes are cleaned, so as to facilitate the subsequent welding of the longitudinal seams of the locking buckles between the curtain tubes; Step S3, the precision welding device (2) starts from the working pit end and moves slowly along the fixed guide groove (14) and the free guide groove (15) under the drive of the traveling motor (25), and at the same time starts the welding machine (3) to weld the longitudinal seam of the lock buckle formed by the matching connection of the sub-buckle (13) and the mother buckle (12), until the precision welding device (2) is received from the other working pit end, and the overhead welding of the longitudinal seam of the lock buckle between the curtain pipes is completed; Step S4, turning over the precision welding device (2), repeating the work of step S3, and completing the top welding of the locking buckle longitudinal seam between the curtain tubes; Step S5, repeating steps S3 and S4, and completing the precise welding of the locking longitudinal seams between all curtain tubes in sequence; Step S6: grouting is performed to fill the spaces inside and between the curtain tubes to form an integral tube-curtain structure with greater lateral rigidity.

2. The construction method of a precision welding device for locking longitudinal seams between small-diameter pipe curtains as claimed in claim 1 is characterized in that: The spring base (22) is connected to a U-shaped frame (23), and the top of the U-shaped frame (23) is connected to a U-shaped frame roller (24).

Images