Auxiliary positioning device for pipeline welding

Abstract

The utility model relates to the technical field of pipeline welding, and provides an auxiliary positioning device for pipeline welding, which comprises a lower arc-shaped supporting plate and an upper arc-shaped pressing plate, the fixed end of the lower arc-shaped supporting plate is used for being placed below the end part of a first pipeline, and the supporting end of the lower arc-shaped supporting plate is used for bearing the end part of a second pipeline; the upper circular-arc-shaped pressing plate is used for being placed above the end of a first pipeline, the fixed side of the upper circular-arc-shaped pressing plate is hinged to the lower circular-arc-shaped supporting plate, the movable side of the upper circular-arc-shaped pressing plate is detachably connected with the lower circular-arc-shaped supporting plate, and the axial length of the upper circular-arc-shaped pressing plate is smaller than that of the lower circular-arc-shaped supporting plate. The splicing position of the first pipeline and the second pipeline is located on the outer side of the upper arc-shaped pressing plate. By means of the technical scheme, the problems that when the end of the second pipeline is welded to the end of the first pipeline in the related technology, operation is inconvenient, working efficiency is low, the welded air and water pipeline cannot be horizontally and vertically arranged, and attractiveness is affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline welding technical field, specifically, and relates to a kind of auxiliary positioning device for pipeline welding. BACKGROUND

[0002] With the advancement of two-in-one project, a large number of air and water pipelines need to be welded underground. The single pipeline is up to six meters long, and the weight is close to 50 kilograms. When the end of the second pipeline is welded to the end of the first pipeline, one person needs to hold the spliced part of the first and second pipelines with his hand, and the other person welds, which causes inconvenience in welding operation and low work efficiency. Moreover, the welding angle is completely observed by the naked eye, which causes the air and water pipeline after welding to be unable to be horizontal and vertical, affecting the appearance. SUMMARY

[0003] The utility model provides a kind of auxiliary positioning device for pipeline welding, solve the problem of inconvenient operation, low work efficiency, air and water pipeline after welding unable to be horizontal and vertical, affecting the appearance when the end of the second pipeline is welded to the end of the first pipeline in the related art.

[0004] The technical scheme of the utility model is as follows: an auxiliary positioning device for pipeline welding is used to splice the end of the first pipeline and the end of the second pipeline together, and the key lies in that it comprises,

[0005] a lower circular-arc-shaped supporting plate, a fixed end of the lower circular-arc-shaped supporting plate is used to be placed below the end of the first pipeline, and a supporting end of the lower circular-arc-shaped supporting plate is used to bear the end of the second pipeline;

[0006] an upper circular-arc-shaped pressing plate, the upper circular-arc-shaped pressing plate is used to be placed above the end of the first pipeline, a fixed side of the upper circular-arc-shaped pressing plate is hinged to the lower circular-arc-shaped supporting plate, a movable side of the upper circular-arc-shaped pressing plate is detachably connected to the lower circular-arc-shaped supporting plate, the length of the upper circular-arc-shaped pressing plate in the axial direction is less than the length of the lower circular-arc-shaped supporting plate in the axial direction, and the spliced part of the first pipeline and the second pipeline is located outside the upper circular-arc-shaped pressing plate.

[0007] The central angle of the supporting end of the lower circular-arc-shaped supporting plate is less than or equal to 180°.

[0008] It further comprises,

[0009] a first upper positioning plate, one end of the first upper positioning plate is connected to the movable side of the upper circular-arc-shaped pressing plate, and the other end of the first upper positioning plate has a first upper gap;

[0010] a first lower positioning plate, the first lower positioning plate is located below the first upper positioning plate, one end of the first lower positioning plate is connected to the lower circular-arc-shaped supporting plate, and the other end of the first lower positioning plate has a first lower gap.

[0011] A first hinge shaft is arranged at the first lower notch, and the axial direction of the first hinge shaft is the same as that of the lower arc-shaped supporting plate;

[0012] A first locking screw is hingedly connected to the first lower positioning plate through the first hinge shaft at the lower end thereof, and the middle part of the first locking screw is used for clamping or separating from the first upper notch after the rotation of the first locking screw;

[0013] A first upper locking nut is threadedly connected to the upper end of the first locking screw, and the lower end face of the first upper locking nut is used for contacting or separating from the upper end face of the first upper positioning plate.

[0014] A first lower locking nut is threadedly connected to the first locking screw, and the upper end face of the first lower locking nut is used for contacting or separating from the lower end face of the first upper positioning plate.

[0015] The first hinge shaft is inserted into the first locking screw and the first lower positioning plate, and a first fastening nut is threadedly connected to one end of the first hinge shaft, the other end of the first hinge shaft is provided with a first anti-extraction convex ring, and the first lower positioning plate is clamped between the first fastening nut and the first anti-extraction convex ring.

[0016] An arc-shaped reinforcing plate is arranged above the second pipe end, the fixed side of the arc-shaped reinforcing plate is hingedly connected to the lower arc-shaped supporting plate, the movable side of the arc-shaped reinforcing plate is detachably connected to the lower arc-shaped supporting plate, a welding space is left between the arc-shaped reinforcing plate and the upper arc-shaped pressing plate, and the splicing position of the first pipe and the second pipe is located between the arc-shaped reinforcing plate and the upper arc-shaped pressing plate.

[0017] Further comprising,

[0018] A second upper positioning plate is connected to the movable side of the arc-shaped reinforcing plate at one end thereof, and the other end of the second upper positioning plate is provided with a second upper notch;

[0019] A second lower positioning plate is arranged below the second upper positioning plate, one end of the second lower positioning plate is connected to the lower arc-shaped supporting plate, and the other end of the second lower positioning plate is provided with a second lower notch;

[0020] A second hinge shaft is arranged at the second lower notch, and the axial direction of the second hinge shaft is the same as that of the lower arc-shaped supporting plate;

[0021] The lower end of the second locking screw is hinged with the second lower positioning plate by means of the second hinge shaft, and the middle part of the second locking screw is used for clamping or separating with the second upper gap after the second locking screw is rotated.

[0022] The lower end of the second locking screw is hinged with the second lower positioning plate by means of the second hinge shaft, and the middle part of the second locking screw is used for clamping or separating with the second upper gap after the second locking screw is rotated.

[0023] The lower end of the second locking screw is hinged with the second lower positioning plate by means of the second hinge shaft, and the middle part of the second locking screw is used for clamping or separating with the second upper gap after the second locking screw is rotated.

[0024] The second hinge shaft is inserted with the second locking screw and the second lower positioning plate, and further comprises a second fastening nut which is threaded with one end of the second hinge shaft, and the other end of the second hinge shaft has a second anti-loose convex ring, and the second lower positioning plate is clamped between the second fastening nut and the second anti-loose convex ring.

[0025] The second upper positioning plate is integrally formed with the circular-arc reinforcing plate, and the second lower positioning plate is integrally formed with the lower circular-arc supporting plate.

[0026] The utility model discloses a working principle and beneficial effect for: the fixed end of lower arc-shaped supporting plate is used for placing below the first pipeline end, and the support end of lower arc-shaped supporting plate is used for bearing the end of second pipeline, upper arc-shaped pressing plate is used for placing above the first pipeline end, and the fixed side of upper arc-shaped pressing plate is articulated with lower arc-shaped supporting plate, and the movable side of upper arc-shaped pressing plate is detachable between lower arc-shaped supporting plate, and the length of upper arc-shaped pressing plate along the axial direction is less than the length of lower arc-shaped supporting plate along the axial direction, for making the splicing of first pipeline and second pipeline is located the outside of upper arc-shaped pressing plate. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above-mentioned features, technical characteristics, advantages and implementation modes of the utility model will be further explained in the following explicit and understandable way, combined with the preferred embodiments and the drawings.

[0028] Figure 1 It is the front view of the utility model.

[0029] Figure 2 It is the plan view of the utility model.

[0030] Figure 3 It is the connection structure diagram of first lower locking nut and first locking screw in the utility model.

[0031] Figure 4 It is the plan view of the utility model in the specific use.

[0032] Figure 5 It is the plan view of arc-shaped reinforcing plate, upper arc-shaped pressing plate and lower arc-shaped supporting plate connection in the utility model.

[0033] Figure 6The utility model discloses a circular arc shaped reinforcing plate and the main view of lower circular arc shaped supporting plate connection.

[0034] In the drawing: 1, lower circular arc shaped supporting plate, 2, upper circular arc shaped pressing plate, 3, first upper positioning plate, 4, first lower positioning plate, 5, first hinge shaft, 6, first locking screw, 7, first upper locking nut, 8, first upper gap, 9, first lower gap, 10, first lower locking nut, 11, first fastening nut, 12, first anti -drop boss ring, 13, circular arc shaped reinforcing plate, 14, second upper positioning plate, 15, second lower positioning plate, 16, second hinge shaft, 17, second locking screw, 18, second upper locking nut, 19, second upper gap, 20, second lower gap, 21, second lower locking nut, 22, second fastening nut, 23, second anti -drop boss ring, 24, first pipeline, 25, second pipeline. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, specific implementation manners of the utility model will be described below with reference to the drawings. Obviously, the drawings in the following description only some embodiments of the utility model, and for those skilled in the art, without creating labor, other drawings can also be obtained according to these drawings, and other implementation manners can also be obtained.

[0036] In order to make the drawing simple, only the part related to the utility model is shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, the same structure or function in some drawings is only schematically shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0037] In this paper, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In addition, in the description of the present application, the terms "first", "second" and the like are only used for description, and cannot be understood as indicating or implying relative importance.

[0039] Embodiment, refer to Figures 1-2For an embodiment of the utility model, propose a kind of auxiliary positioning device for pipeline welding, for the end of first pipeline 24 and the end of second pipeline 25 are spliced together, including lower arc-shaped supporting plate 1, upper arc-shaped pressing plate 2, the fixed end of lower arc-shaped supporting plate 1 is used to place below the end of first pipeline 24, the support end of lower arc-shaped supporting plate 1 is used to bear the end of second pipeline 25;Upper arc-shaped pressing plate 2 is used to place above the end of first pipeline 24, the fixed side of upper arc-shaped pressing plate 2 is hinged with lower arc-shaped supporting plate 1, the movable side between upper arc-shaped pressing plate 2 and lower arc-shaped supporting plate 1 is detachably connected, the length of upper arc-shaped pressing plate 2 along the axial direction is less than the length of lower arc-shaped supporting plate 1 along the axial direction, for the splicing of first pipeline 24 and second pipeline 25 is located outside upper arc-shaped pressing plate 2.

[0040] In the embodiment, as shown in Figure 4 When using, as shown, by the cooperation of upper arc-shaped pressing plate 2 and lower arc-shaped supporting plate 1, the positioning device is fixed at the end of first pipeline 24, then the end of second pipeline 25 is placed on lower arc-shaped supporting plate 1, and the end face of second pipeline 25 and the end face of first pipeline 24 are spliced together, the operator only needs to hold second pipeline 25 with one hand, to ensure that second pipeline 25 and first pipeline 24 are accurately spliced, and the other hand can be welded, after welding the splicing part exposed above lower arc-shaped supporting plate 1, the movable side of upper arc-shaped pressing plate 2 and lower arc-shaped supporting plate 1 is loosened, first pipeline 24 and second pipeline 25 are rotated, so that the unwelded part of the splicing of first pipeline 24 and second pipeline 25 is rotated above lower arc-shaped supporting plate 1, then the movable side of upper arc-shaped pressing plate 2 and lower arc-shaped supporting plate 1 is locked again, and welding is carried out again, after welding is completed, the device is positioned and disassembled. The welding operation is convenient, the work efficiency can be improved, the positioning device can limit first pipeline 24 and second pipeline 25, the welding angle no longer completely relies on visual observation, the horizontal and vertical of the wind and water pipeline after welding can be better guaranteed, the welding quality can be improved, and the pipeline is more beautiful.

[0041] Further, the central angle of the support end of lower arc-shaped supporting plate 1 is less than or equal to 180°. Under the premise of ensuring the stable support of second pipeline 25, the central angle of the support end of lower arc-shaped supporting plate 1 is as small as possible, so that more parts of the splicing of first pipeline 24 and second pipeline 25 can be exposed above lower arc-shaped supporting plate 1, the first welding area can be as large as possible, after the first welding is completed, when rotating first pipeline 24 and second pipeline 25, they can be reliably connected, and the stability is better. At the same time, unnecessary space occupation caused by too large central angle is avoided. Moreover, second pipeline 25 can be directly placed from top to bottom on lower arc-shaped supporting plate 1, without the need for axial insertion, and the operation is more simple and convenient.

[0042] Further, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first upper positioning plate 3, the first lower positioning plate 4, the first hinge shaft 5, the first locking screw 6, the first upper locking nut 7, one end of the first upper positioning plate 3 is connected with the movable side of the upper arc-shaped pressing plate 2, the other end of the first upper positioning plate 3 has a first upper notch 8; the first lower positioning plate 4 is located below the first upper positioning plate 3, one end of the first lower positioning plate 4 is connected with the lower arc-shaped supporting plate 1, the other end of the first lower positioning plate 4 has a first lower notch 9; the first hinge shaft 5 is arranged at the first lower notch 9, and the axial direction of the first hinge shaft 5 is the same as that of the lower arc-shaped supporting plate 1; the lower end of the first locking screw 6 is hinged with the first lower positioning plate 4 through the first hinge shaft 5, and the middle part of the first locking screw 6 is used for clamping or separating with the first upper notch 8 after the first locking screw 6 is rotated; the first upper locking nut 7 is threadedly connected with the upper end of the first locking screw 6, and the lower end surface of the first upper locking nut 7 is used for contacting or separating with the upper end surface of the first upper positioning plate 3.

[0043] The axes of the lower arc-shaped supporting plate 1, the upper arc-shaped pressing plate 2 and the first hinge shaft 5 are arranged along the front-rear direction, the right side of the upper arc-shaped pressing plate 2 is hinged with the lower arc-shaped supporting plate 1, and the right end of the first upper positioning plate 3 is connected with the left side of the upper arc-shaped pressing plate 2, for example, the right end of the first lower positioning plate 4 is connected with the left side of the lower arc-shaped supporting plate 1, and the first upper positioning plate 3 and the first lower positioning plate 4 provide a basis for the installation and fixation of the first hinge shaft 5, the first locking screw 6 and the first upper locking nut 7. The first upper notch 8 is located on the left side surface of the first upper positioning plate 3 and penetrates the first upper positioning plate 3 from top to bottom, and the first lower notch 9 is located on the left side surface of the first lower positioning plate 4 and penetrates the first lower positioning plate 4 from top to bottom. When the left side of the upper arc-shaped pressing plate 2 is locked with the lower arc-shaped supporting plate 1, as shown in Figure 1 , the middle part of the first locking screw 6 is clamped with the first upper notch 8 on the first upper positioning plate 3, the first upper locking nut 7 is threadedly connected with the upper end of the first locking screw 6, and the lower end surface of the first upper locking nut 7 is in contact with the upper end surface of the first upper positioning plate 3. When it is needed to separate the left side of the upper arc-shaped pressing plate 2 from the lower arc-shaped supporting plate 1, first, the first upper locking nut 7 is rotated to move upward and separate from the first upper positioning plate 3, and then the upper end of the first locking screw 6 is rotated counterclockwise around the first hinge shaft 5 to separate the first locking screw 6 from the first upper positioning plate 3, so that the left end of the upper arc-shaped pressing plate 2 can be flipped upward.

[0044] When it is needed to lock the left side of the upper arc-shaped pressing plate 2 and the lower arc-shaped supporting plate 1 again, the upper end of the first locking screw 6 is rotated right upward around the first hinge shaft 5, so that the middle part of the first locking screw 6 is clamped with the first upper gap 8 on the first upper positioning plate 3, then the first upper locking nut 7 is rotated to move downward to contact the upper end surface of the first upper positioning plate 3. The structure is simple, the disassembly and assembly are convenient and fast, time and labor are saved, the operation convenience and work efficiency can be improved. The upper arc-shaped pressing plate 2 can be firmly fixed above the first pipeline 24 during the welding process, cooperated with the lower arc-shaped supporting plate 1, the first pipeline 24 and the second pipeline 25 are stably positioned and supported, the first pipeline 24 and the second pipeline 25 are prevented from moving or shaking during the welding process, the welding stability and precision can be improved, the welding angle is more accurate, so that the horizontal and vertical of the air and water pipeline after welding can be better guaranteed, the welding quality can be improved, and the pipeline is more beautiful.

[0045] Further, as shown in Figure 3 the first lower locking nut 10 is further included, the first lower locking nut 10 is in threaded connection with the first locking screw 6, and the upper end surface of the first lower locking nut 10 is used to contact or separate from the lower end surface of the first upper positioning plate 3. When the middle part of the first locking screw 6 is clamped with the first upper gap 8 on the first upper positioning plate 3, the upper end surface of the first lower locking nut 10 contacts the lower end surface of the first upper positioning plate 3, which can effectively prevent the first locking screw 6 from slipping out of the first upper gap 8. When it is needed to separate the left side of the upper arc-shaped pressing plate 2 and the lower arc-shaped supporting plate 1, the first lower locking nut 10 is rotated to move downward to separate from the first upper positioning plate 3. The upper arc-shaped pressing plate 2 and the lower arc-shaped supporting plate 1 are more firmly and reliably locked, the structure is simple, the adjustment is convenient and fast, and time and labor are saved.

[0046] Further, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the first hinge shaft 5 is plugged into the first locking screw 6 and the first lower positioning plate 4 at the same time, and also includes a first fastening nut 11. The first fastening nut 11 is threadedly connected to one end of the first hinge shaft 5, and the other end of the first hinge shaft 5 has a first anti-slip convex ring 12. The first lower positioning plate 4 is clamped between the first fastening nut 11 and the first anti-slip convex ring 12. Taking the example of the first hinge shaft 5 with the first anti-slip convex ring 12 at the front end and the first fastening nut 11 located behind the first lower positioning plate 4, when it is necessary to remove the first locking screw 6, the first fastening nut 11 is rotated to separate the first fastening nut 11 from the first hinge shaft 5, and then the first hinge shaft 5 is pulled forward to separate the first hinge shaft 5 from the first locking screw 6. When the first locking screw 6 needs to be installed, the lower end of the first locking screw 6 is placed on the first lower notch 9 on the first lower positioning plate 4, the rear end of the first hinge shaft 5 is moved backward to pass through the first lower positioning plate 4 and the first locking screw 6, and then the first fastening nut 11 is threadedly connected to the rear end of the first hinge shaft 5, and the first lower positioning plate 4 is clamped between the first fastening nut 11 and the first anti-slip convex ring 12. The structure is simple, and disassembly and assembly are convenient and fast, saving time and effort. In addition, the connection of the first hinge shaft 5 can be ensured to be firm, preventing it from loosening or falling off during use, thereby improving the reliability of the entire device.

[0047] Further, such as Figure 5 and Figure 6 As shown, the arc-shaped reinforcement plate 13 is further included. The arc-shaped reinforcement plate 13 is used to be placed above the end of the second pipeline 25. The fixed side of the arc-shaped reinforcement plate 13 is hinged to the lower arc-shaped support plate 1, and the movable side of the arc-shaped reinforcement plate 13 is detachably connected to the lower arc-shaped support plate 1. A welding space is left between the arc-shaped reinforcement plate 13 and the upper arc-shaped pressure plate 2, and the joint between the first pipeline 24 and the second pipeline 25 is located between the arc-shaped reinforcement plate 13 and the upper arc-shaped pressure plate 2. The arc-shaped reinforcement plate 13 is used to lock the second pipeline 25 to the lower arc-shaped support plate 1, which can further enhance the support and fixation of the second pipeline 25. At the same time, it cooperates with the upper arc-shaped pressure plate 2 to provide better conditions for welding and better ensure welding quality.

[0048] Further, the second upper positioning plate 14, the second lower positioning plate 15, the second hinge shaft 16, the second locking screw 17, the second upper locking nut 18 are further included. One end of the second upper positioning plate 14 is connected with the movable side of the circular arc reinforcing plate 13, and the other end of the second upper positioning plate 14 has a second upper notch 19. The second lower positioning plate 15 is located below the second upper positioning plate 14, one end of the second lower positioning plate 15 is connected with the lower circular arc supporting plate 1, and the other end of the second lower positioning plate 15 has a second lower notch 20. The second hinge shaft 16 is arranged at the second lower notch 20, and the axial direction of the second hinge shaft 16 is the same as that of the lower circular arc supporting plate 1. The lower end of the second locking screw 17 is hinged with the second lower positioning plate 15 through the second hinge shaft 16. After the second locking screw 17 is rotated, the middle part of the second locking screw 17 is used for clamping or separating with the second upper notch 19. The second upper locking nut 18 is threadedly connected with the upper end of the second locking screw 17, and the lower end surface of the second upper locking nut 18 is used for contacting or separating with the upper end surface of the second upper positioning plate 14.

[0049] The axial lines of the circular arc supporting plate 1, the circular arc reinforcing plate 13 and the second hinge shaft 16 are arranged along the front-rear direction. The right side of the circular arc reinforcing plate 13 is hinged with the lower circular arc supporting plate 1. The right end of the second upper positioning plate 14 is connected with the left side of the circular arc reinforcing plate 13, and the right end of the second lower positioning plate 15 is connected with the left side of the lower circular arc supporting plate 1. The second upper positioning plate 14 and the second lower positioning plate 15 provide a basis for the installation and fixation of the second hinge shaft 16, the second locking screw 17 and the second upper locking nut 18. The second upper notch 19 is located on the left side surface of the second upper positioning plate 14 and penetrates the second upper positioning plate 14 from top to bottom. The second lower notch 20 is located on the left side surface of the second lower positioning plate 15 and penetrates the second lower positioning plate 15 from top to bottom. When the left side of the circular arc reinforcing plate 13 is locked with the lower circular arc supporting plate 1, as shown in Figs. 5 and 6, the middle part of the second locking screw 17 is clamped with the second upper notch 19 on the second upper positioning plate 14, the second upper locking nut 18 is threadedly connected with the upper end of the second locking screw 17, and the lower end surface of the second upper locking nut 18 contacts with the upper end surface of the second upper positioning plate 14. Figure 5 and Figure 6 When it is needed to separate the left side of the circular arc reinforcing plate 13 from the lower circular arc supporting plate 1, the second upper locking nut 18 is first rotated to move upward and separate from the second upper positioning plate 14, and then the upper end of the second locking screw 17 is rotated around the second hinge shaft 16 to the left and downward to separate the second locking screw 17 from the second upper positioning plate 14, so that the left end of the circular arc reinforcing plate 13 is flipped upward.

[0050] When it is needed to lock the left side of the arc-shaped reinforcing plate 13 and the lower arc-shaped supporting plate 1 again, the upper end of the second locking screw 17 is rotated upward to the right around the second hinge shaft 16, so that the middle part of the second locking screw 17 is clamped with the second upper gap 19 on the second upper positioning plate 14, and then the second upper locking nut 18 is rotated to move downward to contact the upper end surface of the second upper positioning plate 14. The structure is simple, convenient and fast to disassemble and assemble, time-saving and labor-saving, and the operation convenience and work efficiency can be improved. It can ensure that the arc-shaped reinforcing plate 13 can be firmly fixed above the second pipeline 25 during welding, cooperates with the lower arc-shaped supporting plate 1 and the upper arc-shaped pressing plate 2 to stably position and support the first pipeline 24 and the second pipeline 25, prevents the first pipeline 24 and the second pipeline 25 from moving or shaking during welding, improves the stability and precision of welding, makes the welding angle more accurate, and thus better ensures that the horizontal and vertical of the wind and water pipeline after welding can be guaranteed, improves the welding quality, and makes the pipeline more beautiful.

[0051] Further, as shown in Figure 6 the second lower locking nut 21 is in threaded connection with the second locking screw 17, and the upper end surface of the second lower locking nut 21 is used to contact or separate from the lower end surface of the second upper positioning plate 14. When the middle part of the second locking screw 17 is clamped with the second upper gap 19 on the second upper positioning plate 14, the upper end surface of the second lower locking nut 21 contacts the lower end surface of the second upper positioning plate 14, which can effectively prevent the second locking screw 17 from slipping out of the second upper gap 19. When it is needed to disassemble the left side of the arc-shaped reinforcing plate 13 and the lower arc-shaped supporting plate 1, the second lower locking nut 21 is rotated to move downward to separate from the second upper positioning plate 14. The arc-shaped reinforcing plate 13 and the lower arc-shaped supporting plate 1 are locked more firmly and reliably, and the structure is simple, convenient and fast to adjust, time-saving and labor-saving.

[0052] Further, the second hinge shaft 16 is inserted with the second locking screw 17 and the second lower positioning plate 15, and further comprises a second fastening nut 22, which is screwed with one end of the second hinge shaft 16, and the other end of the second hinge shaft 16 has a second anti-loose convex ring 23, and the second lower positioning plate 15 is clamped between the second fastening nut 22 and the second anti-loose convex ring 23. Taking the example that the front end of the second hinge shaft 16 has the second anti-loose convex ring 23, the second fastening nut 22 is located behind the second lower positioning plate 15, when the second locking screw 17 needs to be disassembled, the second fastening nut 22 is rotated to separate the second fastening nut 22 from the second hinge shaft 16, and then the second hinge shaft 16 is pulled forward to separate the second hinge shaft 16 from the second locking screw 17. When the second locking screw 17 needs to be installed, the lower end of the second locking screw 17 is placed at the second lower notch 20 on the second lower positioning plate 15, the rear end of the second hinge shaft 16 is moved backward to pass through the second lower positioning plate 15 and the second locking screw 17, then the second fastening nut 22 is screwed with the rear end of the second hinge shaft 16, and the second lower positioning plate 15 is clamped between the second fastening nut 22 and the second anti-loose convex ring 23. The structure is simple, easy and fast to disassemble and assemble, time and labor are saved, the connection firmness of the second hinge shaft 16 can be ensured, loosening or falling off in the use process can be prevented, and the reliability of the whole device can be improved.

[0053] Further, the second upper positioning plate 14 is integrally formed with the circular arc reinforcing plate 13, and the second lower positioning plate 15 is integrally formed with the lower circular arc supporting plate 1. The overall integrity and stability of the structure can be enhanced, loosening and failure that may occur at the connection part can be reduced, and the durability of the device can be improved.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An auxiliary positioning device for pipeline welding, used for splicing the end of a first pipeline (24) and the end of a second pipeline (25), characterized in that: include, a lower arc-shaped support plate (1), wherein the fixed end of the lower arc-shaped support plate (1) is used to be placed below the end of the first pipeline (24), and the supporting end of the lower arc-shaped support plate (1) is used to support the end of the second pipeline (25); An upper arc-shaped pressure plate (2) is used to be placed above the end of the first pipeline (24), the fixed side of the upper arc-shaped pressure plate (2) is hinged to the lower arc-shaped support plate (1), the movable side of the upper arc-shaped pressure plate (2) and the lower arc-shaped support plate (1) are detachably connected, the axial length of the upper arc-shaped pressure plate (2) is smaller than the axial length of the lower arc-shaped support plate (1), and is used to ensure that the joint between the first pipeline (24) and the second pipeline (25) is located outside the upper arc-shaped pressure plate (2).

2. The auxiliary positioning device for pipeline welding according to claim 1, characterized in that: The central angle of the supporting end of the lower arc-shaped support plate (1) is less than or equal to 180°.

3. The auxiliary positioning device for pipeline welding according to claim 1, characterized in that: Also includes, a first upper positioning plate (3), one end of the first upper positioning plate (3) being connected to the movable side of the upper arc-shaped pressing plate (2), and the other end of the first upper positioning plate (3) being provided with a first upper notch (8); a first lower positioning plate (4), the first lower positioning plate (4) being located below the first upper positioning plate (3), one end of the first lower positioning plate (4) being connected to the lower arc-shaped supporting plate (1), and the other end of the first lower positioning plate (4) having a first lower notch (9); a first hinge shaft (5), the first hinge shaft (5) being arranged at the first lower notch (9), and the axial direction of the first hinge shaft (5) being the same as the axial direction of the lower arc-shaped support plate (1); a first locking screw (6), wherein the lower end of the first locking screw (6) is hinged to the first lower positioning plate (4) by means of the first hinge shaft (5); after the first locking screw (6) is rotated, the middle portion of the first locking screw (6) is used to engage with or disengage from the first upper notch (8); A first upper locking nut (7) is threadedly connected to the upper end of the first locking screw (6), and the lower end surface of the first upper locking nut (7) is used to contact or separate from the upper end surface of the first upper positioning plate (3).

4. The auxiliary positioning device for pipeline welding according to claim 3, characterized in that: It also includes a first lower locking nut (10), which is threadedly connected to the first locking screw (6), and the upper end surface of the first lower locking nut (10) is used to contact or separate from the lower end surface of the first upper positioning plate (3).

5. The auxiliary positioning device for pipeline welding according to claim 3, characterized in that: The first hinge shaft (5) is plugged into the first locking screw (6) and the first lower positioning plate (4) at the same time, and further comprises a first fastening nut (11), wherein the first fastening nut (11) is threadedly connected to one end of the first hinge shaft (5), and the other end of the first hinge shaft (5) has a first anti-slip convex ring (12), and the first lower positioning plate (4) is clamped between the first fastening nut (11) and the first anti-slip convex ring (12).

6. The auxiliary positioning device for pipeline welding according to claim 1, characterized in that: It also includes an arc-shaped reinforcement plate (13), which is used to be placed above the end of the second pipeline (25), the fixed side of the arc-shaped reinforcement plate (13) is hinged to the lower arc-shaped support plate (1), the movable side of the arc-shaped reinforcement plate (13) and the lower arc-shaped support plate (1) are detachably connected, a welding space is left between the arc-shaped reinforcement plate (13) and the upper arc-shaped pressure plate (2), and the joint between the first pipeline (24) and the second pipeline (25) is located between the arc-shaped reinforcement plate (13) and the upper arc-shaped pressure plate (2).

7. The auxiliary positioning device for pipeline welding according to claim 6, characterized in that: Also includes, a second upper positioning plate (14), one end of the second upper positioning plate (14) being connected to the movable side of the arc-shaped reinforcing plate (13), and the other end of the second upper positioning plate (14) being provided with a second upper notch (19); a second lower positioning plate (15), the second lower positioning plate (15) being located below the second upper positioning plate (14), one end of the second lower positioning plate (15) being connected to the lower arc-shaped supporting plate (1), and the other end of the second lower positioning plate (15) having a second lower notch (20); a second hinge shaft (16), the second hinge shaft (16) being arranged at the second lower notch (20), and the axial direction of the second hinge shaft (16) being the same as the axial direction of the lower arc-shaped support plate (1); a second locking screw (17), wherein the lower end of the second locking screw (17) is hinged to the second lower positioning plate (15) by means of the second hinge shaft (16); after the second locking screw (17) rotates, the middle portion of the second locking screw (17) is used to engage with or disengage from the second upper notch (19); A second upper locking nut (18) is threadedly connected to the upper end of the second locking screw (17), and the lower end surface of the second upper locking nut (18) is used to contact or separate from the upper end surface of the second upper positioning plate (14).

8. The auxiliary positioning device for pipeline welding according to claim 7, characterized in that: It also includes a second lower locking nut (21), which is threadedly connected to the second locking screw (17), and the upper end surface of the second lower locking nut (21) is used to contact or separate from the lower end surface of the second upper positioning plate (14).

9. The auxiliary positioning device for pipeline welding according to claim 7, characterized in that: The second hinge shaft (16) is simultaneously plugged into the second locking screw (17) and the second lower positioning plate (15), and further includes a second fastening nut (22), the second fastening nut (22) being threadedly connected to one end of the second hinge shaft (16), the other end of the second hinge shaft (16) having a second anti-slip convex ring (23), and the second lower positioning plate (15) being clamped between the second fastening nut (22) and the second anti-slip convex ring (23).

10. The auxiliary positioning device for pipeline welding according to claim 7, characterized in that: The second upper positioning plate (14) and the arc-shaped reinforcing plate (13) are integrally formed, and the second lower positioning plate (15) and the lower arc-shaped supporting plate (1) are integrally formed.

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