Clamping and positioning device for longitudinal seam welding of man-made wind pipe

Abstract

The clamping and positioning device comprises at least two pipeline positioning pieces which are arranged at intervals, each pipeline positioning piece comprises a bottom support with a semicircular groove in the upper end face, an arc-shaped plate is rotatably installed on each bottom support, and after the arc-shaped plates and the bottom supports are folded, the arc-shaped plates and the bottom supports are fixed through bolts. A circular clamping hole used for clamping a pipeline is formed in the middle of the clamping sleeve. The diameters of the circular clamping holes are equal, the circle centers of the circular clamping holes are located on the same center line, and all the circular clamping holes form a transverse circular clamping channel. Guiding and positioning pieces used for guiding the pipeline edges on the two sides of the pipe seam of the to-be-welded pipeline are detachably installed on the pipeline positioning pieces at the left end and the right end correspondingly, each guiding and positioning piece comprises an adjusting rod with the tail end bent and stretching into the corresponding circular clamping hole, and an arc-shaped guiding plate is arranged at the tail end of each adjusting rod; the adjusting rod can drive the arc-shaped guide plate to move towards the hole wall of the circular clamping hole in the inner wall of the pipeline positioning piece under the action of external force and position the arc-shaped guide plate, and pipeline edges on the two sides of the pipe seam of the to-be-welded pipeline are tightly pressed.

Description

Technical Field

[0001] The utility model relates to the field of pipe welding, in particular to a clamping and positioning device for longitudinal seam welding of air-protection pipes. Background Art

[0002] In civil air defense projects, multiple air ducts are usually installed to ensure good ventilation and exhaust harmful gases. Generally speaking, civil air defense air ducts are circular, formed by curling a rectangular steel plate and welding the two ends of the plate to form a closed whole. The plate has a certain rolling property after curling, and the civil air defense air duct has a large diameter and heavy weight, so it is very difficult to control when directly welded, which will affect the welding accuracy.

[0003] In order to prevent the pipe from rolling during the welding process and facilitate the welder to weld, the Chinese patent with application number 202222733369.6 discloses a ventilation pipe straight seam welding machine, whose structure includes: a welding machine support, a welding platform fixed on the welding machine support, and a ventilation pipe clamped and installed at the bottom of the welding platform, and also includes a support device fixed to the welding machine support and used to support the bottom of the ventilation pipe; the support device includes two support frames respectively installed on both sides of the bottom of the ventilation pipe, a supporting device fixed between the tops of the support frames, and a roller fixing frame installed above the supporting device, and the roller fixing frame is provided with a plurality of rotating wheels facing the side of the ventilation pipe. The above-mentioned welding machine supports and positions the pipeline through a supporting device, and faces the weld upward, so that the pipeline will not roll during welding. However, the overall structure of the above-mentioned support device is relatively complex, and for the thinner pipe to be welded, the welding edges are prone to overlap, which affects the welding. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a clamping and positioning device for the longitudinal seam welding of civil air-protection ducts, so as to solve the problems that the supporting and positioning mechanism during existing pipeline welding has a complex structure, high cost, and cannot shape the pipeline and guide and align the welding edge.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A clamping and positioning device for welding longitudinal seams of civil air-protection ducts, comprising at least two pipe positioning members arranged at intervals, the pipe positioning member comprising a base having a semicircular groove on the upper end face, and an arc plate rotatably mounted on the base, and when the arc plate and the base are closed, a circular clamping hole for clamping the pipe is formed in the middle; the diameters of the circular clamping holes are equal, and the centers of the circles are on the same center line, and all the circular clamping holes form a transverse circular clamping channel; a guide positioning member for guiding the pipe edges on both sides of the pipe seam of the pipe to be welded can be detachably mounted on the pipe positioning members at the left and right ends, the guide positioning member comprising an adjusting rod with a bent end extending into the circular clamping hole, and an arc guide plate is provided at the end of the adjusting rod, and the adjusting rod can drive the arc guide plate to move and position toward the inner wall of the circular clamping hole of the pipe positioning member under the action of external force, so as to press the pipe edges on both sides of the pipe seam of the pipe to be welded. In this way, after using a bottom bracket and an arc plate with a semicircular shape, after placing the pipe to be welded in the circular groove of the plate on the bottom bracket, the arc plate is rotated, and the end of the arc plate is closed with the upper end of the bottom bracket, and the pipe to be welded is clamped in the circular clamping channel formed after closing. The circular clamping channel will shape and position the outer end face of the pipe to be welded. At this time, the pipe to be welded cooperates with the circular clamping hole, and the pipe to be welded is clamped and stabilized in the circular clamping channel. After rotating the arc plate, if the pipe to be welded is thin, the pipe edges on both sides of the weld seam are prone to overlap. In order to facilitate the positioning of the two pipe edges, the adjustment rod is manually pulled outward from the guide positioning member, and the arc guide plate at the end of the adjustment rod moves accordingly, thereby pressing on the two pipe edges, so that the two pipe edges are aligned. When welding, the weld seams between the pipe positioning members are first spot welded, and then after removing the guide positioning member, the arc plate is rotated, and the pipe after preliminary welding is taken out, and the pipe edges at the remaining positions are welded together. The adjusting rod of the provided guiding positioning member can realize position adjustment and adapt to the tight positioning of the edges of pipes with different thicknesses.

[0007] Furthermore, the guide positioning member also includes an arc-shaped clamping plate, which is parallel to the arc-shaped guide plate and has an adjustment hole; one end of the adjustment rod is connected to the arc-shaped guide plate, and the other end passes through the outside of the adjustment hole and is threadedly matched with a locking nut. In this way, the arc-shaped clamping plate is used to connect and install the adjustment rod. After the adjustment rod is pulled by an external force, it will slide in the adjustment hole until the adjustment rod cannot be pulled. After the arc-shaped guide plate is tightly attached to the two pipe edges of the pipe to be welded, the locking nut is rotated to make the inner side of the locking nut tightly attached to the arc-shaped clamping plate, so that the adjustment rod and the arc-shaped guide plate can be positioned.

[0008] Furthermore, a through hole is provided on the arc-shaped clamping plate, and a threaded hole is provided on the bottom bracket or the arc-shaped plate. The arc-shaped clamping plate is fixed by a tightening screw rod passing through the through hole and then threadedly matched with the threaded hole. In this way, the arc-shaped clamping plate can be fixed to the bottom bracket or the arc-shaped plate by the tightening screw rod matching with the threaded hole. This method of assembling the guide positioning member has a simple structure and a stable installation structure.

[0009] Further, a slot is provided on the bottom bracket or the arc plate, and the arc clamping plate is inserted into the slot. In this way, the arc clamping plate is assembled on the bottom bracket or the arc plate by means of a socket-and-socket connection, which is convenient for installation and removal, and the installation structure is stable.

[0010] Furthermore, it also includes a bottom plate, and the bottom bracket of the pipeline positioning member is fixedly mounted on the bottom plate. In this way, the pipeline positioning member is fixed on the bottom plate and forms an integral body with the bottom plate, which is convenient for carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the assembly structure of the clamping and positioning device for longitudinal seam welding of the air-protection duct and the pipe to be welded in the embodiment;

[0012] Figure 2 for Figure 1 A top view of

[0013] Figure 3 for Figure 1 Side view of. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0015] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] like Figure 1-Figure 3As shown, the present embodiment provides a clamping and positioning device for welding the longitudinal seam of a human air-protection duct, comprising a base plate 1 and two pipe positioning members 2 installed on the base plate 1 at intervals, wherein the pipe positioning member 2 comprises a base support 21 having a semicircular groove on the upper end surface, and an arc plate 22 is rotatably installed on the base support 21, and when the arc plate 22 is closed with the base support 21, a circular clamping hole for clamping the pipe is formed in the middle; the closed ends of the base support 21 and the arc plate 22 are closed and positioned by a magnetic attraction, or are connected and fixed together by a connecting member; the diameters of the circular clamping holes are equal, and the center of the circle is at On the same center line, all the circular clamping holes form a circular clamping channel; a guide positioning member 3 for guiding the pipe edges on both sides of the pipe seam of the pipe 4 to be welded can be detachably installed on the pipe positioning member 2 at the left and right ends, and the guide positioning member 3 includes an adjustment rod 32 with a bent end and extending into the circular clamping hole, and an arc-shaped guide plate 31 is provided at the end of the adjustment rod 32. The adjustment rod 32 can drive the arc-shaped guide plate 31 to move and position toward the inner wall of the circular clamping hole of the pipe positioning member 2 under the action of external force, and press the pipe edges on both sides of the pipe seam of the pipe 4 to be welded. In this way, after using the semicircular bottom bracket 21 and the arc plate 22, after placing the pipe 4 to be welded in the circular groove of the plate on the bottom bracket 21, the arc plate 22 is rotated, and the end of the arc plate 22 is closed with the upper end of the bottom bracket 21, and the pipe 4 to be welded is clamped in the circular clamping channel formed after closing. The circular clamping channel will shape and position the outer end face of the pipe 4 to be welded. At this time, the pipe 4 to be welded cooperates with the circular clamping hole, and the pipe 4 to be welded is clamped and stabilized in the circular clamping channel. After rotating the arc plate 22, if the pipe 4 to be welded is thin, the pipe edges on both sides of the weld seam are prone to overlap. In order to facilitate the positioning of the two pipe edges, the adjustment rod 32 is manually pulled outward from the guide positioning member 3, and the arc guide plate 31 at the end of the adjustment rod 32 moves accordingly, thereby pressing on the two pipe edges, so that the two pipe edges are aligned. When welding, first spot weld the welds between the pipe positioning members 2, then remove the guide positioning member 3, rotate the arc plate 22, take out the pipe after preliminary welding, and weld the pipe edges at the remaining positions together. The adjustment rod 32 of the provided guide positioning member 3 can realize position adjustment to adapt to the tight positioning of pipe edges of different thicknesses.

[0017] In application, the installation position of the guide positioning member 3 can be set near the closing position of the arc plate 22 and the bottom bracket 21, or can be set at any position of the bottom bracket 21 or the arc plate 22. For the convenience of welding, it is more convenient to weld the weld seam of the pipe to be welded upward, that is, it is most convenient to set the guide positioning member 3 at the top position of the arc plate 22. According to the length requirement of the pipe 4 to be welded, three or more pipe positioning members 2 can be set. The pipe positioning member 2 can be installed on the bottom plate 1 by fasteners, or welded on the bottom plate 1.

[0018] Specifically, the guide positioning member 3 also includes an arc-shaped clamping plate 33, which is parallel to the arc-shaped guide plate 31 and has an adjustment hole. One end of the adjustment rod 32 is connected to the arc-shaped guide plate 31, and the other end passes through the adjustment hole and is threadedly matched with a locking nut 34. The arc-shaped clamping plate 33 is used to connect and install the adjustment rod 32. After being pulled by an external force, the adjustment rod 32 will slide in the adjustment hole until the adjustment rod 32 cannot be pulled. After the arc-shaped guide plate 31 is in close contact with the two pipe edges of the pipe 4 to be welded, the locking nut 34 is rotated to make the inner side of the locking nut 34 in close contact with the arc-shaped clamping plate 33, so that the adjustment rod 32 and the arc-shaped guide plate 31 can be positioned. After adopting the above structure, the guide positioning member 3 directly forms an arc clamping space through the arc clamping plate 33 and the arc guide plate 31, and the arc clamping space presses the two pipe edges of the pipe to be welded 4 into the pipe positioning member 2, so that the outer side of the pipe to be welded 4 is guided and positioned by the pipe positioning member 2, and the inner side of the pipe to be welded 4 is guided and positioned by the arc guide plate 31. Specifically, the adjustment rod 32 can be welded and fixed with the arc guide plate 31, or it can be fixed by sleeve. After the locking nut 34 is matched with the external thread at the end of the adjustment rod 32, the arc clamping plate 33 and the arc guide plate 31 can be directly clamped and installed on the pipe positioning member 2.

[0019] The arc clamping plate 33 and the arc guide plate 31 are clamped and fixed on the pipe positioning member 2 only by the locking nut 34 and the screw rod, and the structure is not stable enough. In order to further improve the stability of the installation of the arc clamping plate 33, a through hole is also provided on the arc clamping plate 33, and a threaded hole is provided on the bottom bracket 21 or the arc plate 22. The arc clamping plate 33 passes through the through hole through a tightening screw rod and is fixed with the threaded hole. In this way, the arc clamping plate 33 can be fixed on the bottom bracket 21 or the arc plate 22 by the tightening screw rod and the threaded hole. This method of assembling the guide positioning member 3 has a simple structure and a stable installation structure.

[0020] Of course, in a specific implementation, the following structure can also be used to assemble the arc clamping plate 33: a slot is provided on the bottom bracket 21 or the arc plate 22, and the arc clamping plate 33 is inserted into the slot. In this way, the arc clamping plate 33 is assembled on the bottom bracket 21 or the arc plate 22 in a socket-and-socket manner, which is convenient for installation and removal, and the installation structure is stable.

[0021] 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 the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A clamping and positioning device for welding longitudinal seams of air-protection ducts, characterized in that: It comprises at least two pipe locating members arranged at intervals, the pipe locating member comprises a base with a semicircular groove on the upper end surface, an arc plate is rotatably mounted on the base, and when the arc plate and the base are closed, a circular clamping hole for clamping the pipe is formed in the middle; the diameters of the circular clamping holes are equal, and the centers of the circles are on the same center line, and all the circular clamping holes form a transverse circular clamping channel; a guide locating member for guiding the pipe edges on both sides of the pipe seam of the pipe to be welded can be detachably mounted on the pipe locating members at the left and right ends, the guide locating member comprises an adjusting rod with a bent end extending into the circular clamping hole, and an arc guide plate is arranged at the end of the adjusting rod, and the adjusting rod can drive the arc guide plate to move and position toward the inner wall of the circular clamping hole of the pipe locating member under the action of external force, so as to press the pipe edges on both sides of the pipe seam of the pipe to be welded.

2. The clamping and positioning device for longitudinal seam welding of air-protection duct according to claim 1 is characterized in that: The guide positioning member also includes an arc-shaped clamping plate, which is parallel to the arc-shaped guide plate and has an adjustment hole. One end of the adjustment rod is connected to the arc-shaped guide plate, and the other end passes through the adjustment hole and cooperates with a locking nut thread.

3. The clamping and positioning device for longitudinal seam welding of air-protection ducts according to claim 2 is characterized in that: A through hole is also provided on the arc-shaped clamping plate, and a threaded hole is provided on the bottom bracket or the arc-shaped plate. The arc-shaped clamping plate is threadably matched with the threaded hole after a tightening screw rod passes through the through hole.

4. The clamping and positioning device for longitudinal seam welding of air-protection ducts according to claim 2 is characterized in that: A slot is arranged on the bottom bracket or the arc-shaped plate, and the arc-shaped clamping plate is inserted into the slot.

5. The clamping and positioning device for longitudinal seam welding of air-protection ducts according to claim 1, 2 or 3, characterized in that: It also includes a bottom plate, and the bottom bracket of the pipeline positioning member is fixedly installed on the bottom plate.

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