Device for welding longitudinal seam of pressure steel pipe

Abstract

The utility model discloses a device for welding a longitudinal seam of a pressure steel pipe, and relates to the field of pressure steel pipe manufacturing. Comprising a vertical arc-shaped plate and a vertical side plate; the vertical arc-shaped plate is located outside the pressure steel pipe, and the vertical side plate is located inside the pressure steel pipe. Two first threaded holes are formed in the vertical side plate; and two first bolts are further included. When the first steel pipe tiles and the second steel pipe tiles are spliced to form vertical longitudinal joints, vertical arc-shaped plates are attached to the outer walls, on the two sides of the vertical longitudinal joints, of the pressure steel pipe at the top points and the bottom points of the two vertical longitudinal joints, and two first bolts are correspondingly screwed into two first threaded holes; the ends of the two first bolts abut against the inner walls, on the two sides of the vertical longitudinal seam, of the pressure steel pipe correspondingly, so that the first steel pipe tile and the second steel pipe tile are clamped, and the pressure steel pipe can be turned over by 90 degrees before the longitudinal seam of the pressure steel pipe is welded and an operator stands in the pressure steel pipe to weld the longitudinal seam after the pressure steel pipe is turned over. And the first steel pipe tile and the second steel pipe tile cannot fall off.

Description

Technical Field

[0001] The utility model relates to the field of penstock manufacturing, and particularly relates to a device for longitudinal seam welding of penstocks. Background Art

[0002] A penstock is a steel pipeline used to convey water flow with extremely high water pressure. In the existing method of manufacturing penstocks, usually two steel pipe tiles are formed after circular assembling on a circular assembling platform, and then the two steel pipe tiles are pieced together and aligned, and spot welding is performed on the vertical longitudinal seam at the joint of the two steel pipe tiles to connect the two steel pipe tiles to form a penstock first; then the penstock is flipped 90 degrees, and the vertical longitudinal seam becomes a horizontal longitudinal seam, and the operator stands inside the penstock to perform welding operation on the horizontal longitudinal seam.

[0003] The above process has the following problems: during the process of flipping the penstock 90 degrees and the operator standing inside the penstock to weld the longitudinal seam, since there are only a few welding points between the two steel pipe tiles to generate connection, which is not firm enough, the two steel pipe tiles are very easy to fall off each other, resulting in rework. Content of the Utility Model

[0004] The utility model provides a device for longitudinal seam welding of penstocks, which solves the problem that the two steel pipe tiles are very easy to fall off each other during the process of flipping the penstock 90 degrees before longitudinal seam welding of the penstock and during the process of the operator standing inside the penstock to weld the longitudinal seam after flipping.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a device for longitudinal seam welding of penstocks, the penstock is composed of a first steel pipe tile and a second steel pipe tile, and includes a vertical arc plate and a vertical side plate; the vertical arc plate is located outside the penstock, and the vertical side plate is located inside the penstock; the radian of the vertical arc plate is consistent with the radian of the penstock; the tops of the vertical arc plate and the vertical side plate are connected by a horizontal end plate;

[0006] The vertical side plate is provided with two first threaded holes; and further includes two first bolts; when the first steel pipe tile and the second steel pipe tile are pieced together to form a vertical longitudinal seam, the vertical arc plate fits the outer walls on both sides of the vertical longitudinal seam of the penstock, and the two first bolts are respectively screwed into the two first threaded holes, and the end parts of the two first bolts respectively abut against the inner walls on both sides of the vertical longitudinal seam of the penstock.

[0007] Further, steel balls are connected to the end parts of the first bolts.

[0008] Further, it also includes two nuts; the two nuts are respectively connected to the two first threaded holes; the first bolts are sequentially screwed into the nuts and the first threaded holes.

[0009] Further, it further includes an arc-shaped gasket and a second bolt; the arc-shaped gasket is located inside the vertical arc-shaped plate, and the arc of the arc-shaped gasket is consistent with the arc of the penstock; a groove is opened on the inner side of the arc-shaped gasket, and the groove communicates with a second threaded hole; a third threaded hole is opened on the inner side of the vertical arc-shaped plate; the second bolt is sequentially screwed into the second threaded hole and the third threaded hole, and the head of the second bolt is located in the groove.

[0010] Further, the vertical side plate is an arc-shaped plate and its arc is consistent with the arc of the penstock; the central axis of the first threaded hole passes through the center of the cross-section of the penstock.

[0011] Further, the vertical side plate is provided with a through slot along the longitudinal seam of the penstock.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] When the first steel pipe tile and the second steel pipe tile are pieced together to form a vertical longitudinal seam, at a total of four points, namely the vertices and the bottom points of the two vertical longitudinal seams, the vertical arc-shaped plates are used to fit the outer walls of the penstock on both sides of the vertical longitudinal seam, and the two first bolts are correspondingly screwed into the two first threaded holes, and the end parts of the two first bolts respectively abut against the inner walls of the penstock on both sides of the vertical longitudinal seam, so as to clamp the first steel pipe tile and the second steel pipe tile, so that during the process of turning the penstock by 90 degrees before welding the longitudinal seam of the penstock, and during the process of the operator standing inside the penstock to weld the longitudinal seam after turning, the first steel pipe tile and the second steel pipe tile will not fall off. Description of the Drawings

[0014] Figure 1 It is the left view of the present utility model.

[0015] Figure 2 It is the schematic diagram of the use state of the present utility model.

[0016] Figure 3 It is the front view of the present utility model.

[0017] Figure 4 It is the rear view of the present utility model.

[0018] Figure 5 It is Figure 1 the schematic diagram of area A in

[0019] The meanings of the reference numerals in the drawings are as follows: 1, the first steel pipe tile; 2, the second steel pipe tile; 3, the horizontal end plate; 4, the vertical arc-shaped plate; 5, the vertical side plate; 6, the first bolt; 7, the steel ball; 8, the nut; 9, the arc-shaped gasket; 9a, the groove; 10, the second bolt; 11, the through slot. Detailed Embodiment

[0020] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the specification and the specific embodiments. The described embodiments are one of the embodiments of the present utility model, and the present utility model may also have other embodiments.

[0021] Embodiment:

[0022] See Figures 1 to 4 , a device for longitudinal seam welding of a penstock of the present utility model. The penstock is composed of a first steel pipe tile 1 and a second steel pipe tile 2, and includes a vertical arc plate 4 and a vertical side plate 5; the vertical arc plate 4 is located outside the penstock, and the vertical side plate 5 is located inside the penstock; the radian of the vertical arc plate 4 is consistent with the radian of the penstock; the tops of the vertical arc plate 4 and the vertical side plate 5 are connected by a horizontal end plate 3;

[0023] The vertical side plate 5 is provided with two first threaded holes; it also includes two first bolts 6; when the first steel pipe tile 1 and the second steel pipe tile 2 are pieced together to form a vertical longitudinal seam, the vertical arc plate 4 fits against the outer walls of the penstock on both sides of the vertical longitudinal seam, and the two first bolts 6 are respectively screwed into the two first threaded holes, and the end parts of the two first bolts 6 respectively abut against the inner walls of the penstock on both sides of the vertical longitudinal seam.

[0024] In this embodiment, when the first steel pipe tile 1 and the second steel pipe tile 2 are pieced together to form a vertical longitudinal seam, at a total of four points, namely the apex and the bottom point of the two vertical longitudinal seams, the vertical arc plate 4 fits against the outer walls of the penstock on both sides of the vertical longitudinal seam, the two first bolts 6 are correspondingly screwed into the two first threaded holes, and the end parts of the two first bolts 6 respectively abut against the inner walls of the penstock on both sides of the vertical longitudinal seam, so as to clamp the first steel pipe tile 1 and the second steel pipe tile 2, so that during the process of turning the penstock 90 degrees before longitudinal seam welding of the penstock, and during the process of the operator standing inside the penstock to weld the longitudinal seam after turning, the first steel pipe tile 1 and the second steel pipe tile 2 will not fall off.

[0025] As a preferred embodiment, see Figure 1 , the end parts of the first bolts 6 are all connected with steel balls 7.

[0026] In this embodiment, the end parts of the two first bolts 6 respectively abut against the inner walls of the penstock on both sides of the vertical longitudinal seam through the steel balls 7; the presence of the steel balls 7 enables the first bolts 6 to more fully abut against the inner wall of the penstock.

[0027] As a preferred embodiment, see Figure 1 , it also includes two nuts 8; the two nuts 8 are respectively connected to the two first threaded holes; the first bolts 6 are sequentially screwed into the nuts 8 and the first threaded holes.

[0028] In this embodiment, the setting of the nut 8 makes the length of the first bolt 6 in the threaded hole longer, and further makes the first bolt 6 more stable after abutting against the inner wall of the penstock.

[0029] As a preferred embodiment, referring to Figure 1 , Figure 5 , it further includes an arc-shaped gasket 9 and a second bolt 10; the arc-shaped gasket 9 is located inside the vertical arc-shaped plate 4, and the radian of the arc-shaped gasket 9 is the same as that of the penstock; a groove 9a is opened on the inner side of the arc-shaped gasket 9, and the groove 9a communicates with a second threaded hole; a third threaded hole is opened on the inner side of the vertical arc-shaped plate 4; the second bolt 10 is sequentially screwed into the second threaded hole and the third threaded hole, and the head of the second bolt 10 is located in the groove 9a.

[0030] In this embodiment, when the vertical arc-shaped plate 4 is worn or deformed due to various reasons, resulting in incomplete fitting with the outer wall of the penstock, the arc-shaped gasket 9 is installed inside the vertical arc-shaped plate 4, and the arc-shaped gasket 9 fits the outer wall of the penstock, and the arc-shaped gasket 9 plays a good backup role.

[0031] As a preferred embodiment, referring to Figure 2 , the vertical side plate 5 is an arc-shaped plate and its radian is the same as that of the penstock; the central axis of the first threaded hole passes through the center of the cross-section of the penstock.

[0032] In this embodiment, the direction line of the first bolt 6 screwed into the first threaded hole passes through the center of the cross-section of the penstock. Therefore, the force on the end of the first bolt 6 when abutting against the inner wall of the penstock is better, making the end of the first bolt 6 more stable when abutting against the inner wall of the penstock.

[0033] As a preferred embodiment, referring to Figure 2 , Figure 3 , the vertical side plate 5 is provided with a through slot 11 along the longitudinal seam of the penstock.

[0034] In this embodiment, when the penstock is flipped 90 degrees, the vertical longitudinal seam becomes a horizontal longitudinal seam. When the operator stands inside the penstock and performs welding operations on the horizontal longitudinal seam, the operator can directly perform welding operations on the longitudinal seam near the open end without first removing this device, improving the welding operation efficiency.

[0035] The "connection", "fixation", and "butt joint" mentioned in the description of the present utility model can be fixed connection, machining, welding, or mechanical connection. Understand the specific meanings of the above terms in the present utility model according to the specific situation.

[0036] In the description of the present utility model, terms such as "inside", "upper", "lower", "end", "side", "outside", etc. indicate the orientation or positional relationship only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying a specific orientation that the indicated device or element must have. Therefore, it should not be construed as a limitation to the present utility model.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A device for longitudinal seam welding of a penstock, the penstock being composed of a first penstock segment (1) and a second penstock segment (2), characterized in that: It includes a vertical arc plate (4) and a vertical side plate (5); the vertical arc plate (4) is located outside the penstock, and the vertical side plate (5) is located inside the penstock; the radian of the vertical arc plate (4) is the same as that of the penstock; the tops of the vertical arc plate (4) and the vertical side plate (5) are connected by a horizontal end plate (3). Two first threaded holes are opened on the vertical side plate (5); it also includes two first bolts (6); when the first steel pipe tile (1) and the second steel pipe tile (2) are pieced together to form a vertical longitudinal joint, the vertical arc plate (4) fits the outer walls of the penstock on both sides of the vertical longitudinal joint, and the two first bolts (6) are respectively screwed into the two first threaded holes, and the end parts of the two first bolts (6) respectively abut against the inner walls of the penstock on both sides of the vertical longitudinal joint.

2. The device for longitudinal seam welding of a penstock according to claim 1, wherein: Steel balls (7) are connected to the end parts of the first bolts (6).

3. A device for longitudinal seam welding of a penstock, according to claim 1, characterized in that: It also includes two nuts (8); the two nuts (8) are respectively connected to the two first threaded holes; the first bolts (6) are sequentially screwed into the nuts (8) and the first threaded holes.

4. A device for longitudinal seam welding of penstocks according to claim 1, characterized in that: It also includes an arc-shaped gasket (9) and a second bolt (10); the arc-shaped gasket (9) is located inside the vertical arc plate (4), and the radian of the arc-shaped gasket (9) is the same as that of the penstock; a groove (9a) is opened on the inner side of the arc-shaped gasket (9), and the groove (9a) communicates with a second threaded hole; a third threaded hole is opened on the inner side of the vertical arc plate (4); the second bolt (10) is sequentially screwed into the second threaded hole and the third threaded hole, and the head of the second bolt (10) is located in the groove (9a).

5. A device for longitudinal seam welding of penstocks according to claim 1, characterized in that: The vertical side plate (5) is an arc plate and its radian is the same as that of the penstock; the central axis of the first threaded hole passes through the center of the cross-section of the penstock.

6. The device for longitudinal seam welding of penstocks according to claim 1, wherein: The vertical side plate (5) is provided with a through slot (11) along the longitudinal joint of the penstock.

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