Special sleeve for connecting bolt of top cover and seat ring of hydroelectric generating set

Abstract

The utility model belongs to the technical field of bolt sleeves, and particularly relates to a special sleeve for a connecting bolt of a top cover and a seat ring of a hydroelectric generating set, which comprises a sleeve body and an adjusting component arranged in the sleeve body. An adjusting assembly is arranged on the device, when the device is used, a first screw rod and a second screw rod are rotated, the positions of an adjusting plate a and an adjusting plate b can be moved, use is more flexible, clamping can be conducted after the internal space of a square groove is adjusted according to the size of a connector of the electric wrench, flexibility is high, and labor expenditure is saved; when the sleeve body is matched with the limiting assembly for use, a tension spring is arranged in a formed sliding groove, and a limiting block of a semi-spherical structure on a limiting plate is extruded under the tension of the tension spring to extrude a square block, so that the sleeve body is limited on the surface of the square block, and the sleeve body is prevented from falling off when a bolt is screwed; and the stability during operation is improved, and the use safety is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolt sleeves, and in particular relates to a special sleeve for connecting bolts between a top cover and a seat ring of a hydroelectric generator set. Background Art

[0002] The bolt sleeve is a tool for tightening or loosening screws. Its working principle is to put the bolt into the sleeve and rotate the sleeve to rotate the bolt. In the previous maintenance of axial-flow propeller units, to remove the connecting bolts between the top cover and the seat ring, it is necessary to first unscrew the connecting bolt nut and then unscrew the screw. The screw can only be unscrewed by using an adjustable wrench to tighten the square head at the top. Due to the heavy weight and large volume of the screw, and the long-term stress and moisture rust, the maintenance personnel only use an adjustable wrench to manually unscrew it, which is time-consuming and laborious. Some screws cannot be unscrewed by manpower alone, and need to be unscrewed by welding a homemade sleeve, a force rod and a sledgehammer.

[0003] After checking, the disclosure (announcement) number: CN215036981U discloses a bolt sleeve, and this technology discloses "a bolt sleeve, including a hexagonal outer sleeve, a plate that cooperates with the inner wall of each side of the hexagonal outer sleeve, a plurality of plates that can enclose an inner sleeve for screwing nuts, the distance between the plate and the corresponding inner wall of the hexagonal outer sleeve is adjustable, positioning grooves are provided on the walls of each side of the hexagonal outer sleeve, and the outer wall of the plate is rotatably provided with an adjustment clamping column that penetrates the positioning groove, and a plurality of clamping grooves are equidistantly provided on the column wall on one side of the adjustment clamping column, and the clamping grooves can be buckled in the upper groove wall of the positioning groove, and a side support mechanism is provided below the hexagonal outer sleeve, and the bolt sleeve is disclosed. Through the cooperation among the hexagonal outer sleeve, the plate, the positioning groove, the adjustment clamping column and the side support mechanism, the sleeve can be adjusted to the corresponding size and the relative position of the sleeve can be fixed according to the size of the bolt to be screwed off as needed, and the operation of nuts of various specifications and other technical effects are applicable".

[0004] Although the design is applicable to nuts of various specifications, it can only be used to unscrew ordinary smaller bolts in actual use. When unscrewing the connecting bolts between the top cover and the seat ring of the hydropower unit, due to the heavy weight and large volume of the screw rods, and the long-term stress, moisture and rust, the maintenance personnel can only use a movable wrench to manually unscrew them, which is time-consuming and laborious. Some screws cannot be unscrewed by manpower alone, and need to be unscrewed by welding a homemade sleeve, a force rod and a sledgehammer. It is time-consuming and laborious to screw in the screw rods, and there is a high risk of injury to the maintenance personnel due to the impact of objects.

[0005] In order to solve the above problems, the present application proposes a special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit, which has the characteristics of simple structure, convenient use, and can make it easier to unscrew the connecting bolts between the top cover and the seat ring of the hydropower unit, and facilitate the electric wrench to unscrew the screw through the sleeve.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special sleeve for connecting bolts between a top cover and a seat ring of a hydropower unit, comprising a sleeve body and an adjustment assembly arranged in the sleeve body;

[0008] The adjustment assembly includes an adjustment plate a symmetrically arranged on the surface of the sleeve body and a first screw rod threaded in a threaded hole a symmetrically opened on the surface of the sleeve body, the first screw rod passes through the sleeve body and is connected to the adjustment plate a arranged in the sleeve body, a second screw rod is threaded in a threaded hole b symmetrically opened on the surface of the sleeve body, one end of the second screw rod passes through the sleeve body and is connected to the surface of the adjustment plate b arranged in the sleeve body.

[0009] As a preferred embodiment of the utility model, a special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit is provided, wherein the two adjustment plates a slide on the surfaces of the two adjustment plates b, and the adjustment plates a and the adjustment plates b are arranged in a cross-overlapping manner.

[0010] As a preferred embodiment of the utility model, a special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit, the inner wall of the sleeve square groove opened on the surface of the sleeve body is symmetrically provided with grooves adapted to the adjustment plate a, and the adjustment plate a slides in the sleeve body through the grooves.

[0011] As a preferred embodiment of the utility model, a special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit is provided, wherein a stabilizing block is symmetrically installed on the surface of the adjusting plate a, a square groove is provided inside the sleeve body, and a guide groove matching the stabilizing block is provided on the inner wall thereof, and the adjusting plate a slides in the sleeve body through the guide groove and the stabilizing block.

[0012] As a preferred special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit according to the utility model, it also includes a limit assembly arranged in a square groove provided on the other side surface of the sleeve body, the limit assembly includes a slide groove symmetrically provided on the inner wall of the square groove provided on the sleeve body, a limit block provided in the slide groove provided on the sleeve body, and a limit plate installed on the surface of the limit block, the limit plate slides in the slide groove, and a tension spring is provided in the slide groove provided on the sleeve body, one end of the tension spring abuts against the limit plate, and the other end of the tension spring abuts against the slide groove.

[0013] As a preferred embodiment of the special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit of the utility model, the limit block is arranged in a semi-spherical structure.

[0014] As a preferred embodiment of the special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit of the utility model, one end of the slide groove is arranged in an arc-shaped structure that gradually expands from the outside to the inside, and the limit block abuts against the through hole at one end of the slide groove.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] An adjusting component is provided on this device. When in use, the first screw is rotated to drive the position of the adjusting plate a to move in the square groove opened in the sleeve body, and the second screw and the adjusting plate b are cooperated. By rotating the first screw and the second screw, the position of the adjusting plate a and the adjusting plate b can be moved. It is more flexible to use. The internal space of the square groove can be adjusted according to the size of the joint of the electric wrench and then engaged. It has strong flexibility and saves labor expenses. When used in conjunction with the limit component, a tension spring is provided in the opened slide groove. Under the tension of the tension spring, the limit block with a semi-spherical structure on the limit plate is squeezed to squeeze the square block, thereby limiting the sleeve body to the surface of the square block, avoiding the sleeve body from falling off when tightening the bolt, improving stability during operation, and having high safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a front view schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the adjustment component in the utility model;

[0021] Figure 4 It is a structural schematic diagram of the limit assembly in the utility model;

[0022] In the figure: 1. sleeve body;

[0023] 2. Adjustment assembly; 21. Adjustment plate a; 22. First screw rod; 23. Stabilization block; 24. Guide groove; 25. Groove; 26. Second screw rod; 27. Adjustment plate b; 3. Limiting assembly; 31. Slide groove; 32. Limiting block; 33. Limiting plate; 34. Tension spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1 As shown;

[0027] A special sleeve for connecting bolts between a top cover and a seat ring of a hydropower unit comprises a sleeve body 1.

[0028] In this embodiment: after checking the public (announcement) number: CN215036981U discloses a bolt sleeve, this technology discloses "a bolt sleeve, including a hexagonal outer sleeve, a plate that cooperates with the inner side walls of the hexagonal outer sleeve, and a plurality of plates that can enclose an inner sleeve for tightening a nut, and the distance between the plate and the corresponding inner wall of the hexagonal outer sleeve is adjustable, and positioning grooves are provided on the side walls of the hexagonal outer sleeve, and the outer wall of the plate is rotatably provided with an adjusting clamping column that penetrates the positioning groove, and a plurality of slots are equidistantly provided on the column wall on one side of the adjusting clamping column, and the clamping groove can be buckled in the upper groove wall of the positioning groove, and a side support mechanism is provided below the hexagonal outer sleeve, and the bolt sleeve is disclosed, which can be screwed down according to the size of the bolt as needed through the cooperation between the hexagonal outer sleeve, the plate, the positioning groove, the adjusting clamping column and the side support mechanism. The design is applicable to nuts of various specifications, but in actual use, it can only unscrew ordinary smaller bolts. When unscrewing the bolts connecting the top cover and the seat ring of the hydropower unit, due to the heavy weight and large volume of the screw rod, and the long-term stress and moisture rust, the maintenance personnel only use a movable wrench to manually unscrew it, which is time-consuming and laborious. Some screws cannot be unscrewed by manpower alone, and need to be unscrewed by welding a homemade sleeve, a force rod and a sledgehammer. It is time-consuming and laborious to screw in the screw rod, and there is a greater risk of injury to the maintenance personnel due to the impact of objects. In terms of actual use, this problem is obviously a real problem that exists and is difficult to solve. Therefore, in order to solve this technical problem, an adjustment component 2 and a limit component 3 are added to the application document.

[0029] It should be noted that: the surface of the sleeve body 1 is provided with two square grooves of different sizes, which are respectively engaged with the square blocks welded on the screw and one end of the electric wrench, and the connecting bolts between the top cover and the seat ring of the hydropower unit are unscrewed by the electric wrench.

[0030] More specifically:

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown;

[0032] In combination with the above content, it also includes an adjustment component 2 arranged in the sleeve body 1, and the adjustment component 2 includes an adjustment plate a21 symmetrically arranged on the surface of the sleeve body 1 and a first screw 22 threaded in a threaded hole a symmetrically opened on the surface of the sleeve body 1, the first screw 22 passes through the sleeve body 1 and is connected to the adjustment plate a21 arranged in the sleeve body 1, and a second screw 26 is threaded in the threaded hole b symmetrically opened on the surface of the sleeve body 1, one end of the second screw 26 passes through the sleeve body 1, and is connected to the surface of the adjustment plate b27 arranged in the sleeve body 1.

[0033] In this embodiment: by setting an adjustment component 2 on the sleeve body 1, when in use, the first screw 22 is rotated to drive the position of the adjustment plate a21 to move in the square groove opened in the sleeve body 1, and cooperate with the second screw 26 and the adjustment plate b27. By rotating the first screw 22 and the second screw 26, the position of the adjustment plate a21 and the adjustment plate b27 can be moved, making the use more flexible, and the internal space of the square groove can be adjusted according to the size of the joint of the electric wrench and then engaged, which has strong flexibility.

[0034] It should be noted that the two adjustment plates a21 slide on the surfaces of the two adjustment plates b27, and the adjustment plates a21 and b27 are arranged in a cross-stacked manner. This design can greatly improve the flexibility of the use of the sleeve body 1. By adjusting the positions of the adjustment plates a21 and b27 and adjusting the size of the square groove in the sleeve body 1, the use is more convenient.

[0035] In an optional embodiment, the inner wall of the sleeve square groove opened on the surface of the sleeve body 1 is symmetrically provided with a groove 25 adapted to the adjustment plate a21 , and the adjustment plate a21 slides in the sleeve body 1 through the groove 25 .

[0036] In this embodiment, by providing the groove 25 , the adjustment plate a21 can be retracted into the groove 25 when not in use.

[0037] In an optional embodiment, a stabilizing block 23 is symmetrically installed on the surface of the adjustment plate a21, and a square groove is opened inside the sleeve body 1, and the inner wall thereof is provided with a guide groove 24 adapted to the stabilizing block 23, and the adjustment plate a21 slides in the sleeve body 1 through the guide groove 24 and the stabilizing block 23.

[0038] In this embodiment, by installing stabilizing blocks 23 at both ends of the adjusting plate a21 and engaging the stabilizing blocks 23 into the guide grooves 24 during use, the stability of the adjusting plate a21 can be further improved, and the use effect is good.

[0039] Going further:

[0040] like Figure 1 and Figure 4 As shown;

[0041] In combination with the above content, it also includes a limit assembly 3 arranged in a square groove opened on the other side surface of the sleeve body 1. The limit assembly 3 includes a slide groove 31 symmetrically opened on the inner wall of the square groove opened in the sleeve body 1, a limit block 32 arranged in the slide groove 31 opened in the sleeve body 1, and a limit plate 33 installed on the surface of the limit block 32. The limit plate 33 slides in the slide groove 31. The slide groove 31 opened in the sleeve body 1 is provided with a tension spring 34. One end of the tension spring 34 abuts against the limit plate 33, and the other end of the tension spring 34 abuts against the slide groove 31.

[0042] In this embodiment: when used in conjunction with the limit assembly 3, a tension spring 34 is set in the opened slide groove 31, and the limit block 32 with a semi-spherical structure on the limit plate 33 is squeezed under the tension of the tension spring 34 to squeeze the square block, thereby limiting the sleeve body 1 on the surface of the square block, avoiding the sleeve body 1 from falling off when tightening the bolt, improving stability during operation, and high safety in use.

[0043] It should be noted that the limiting block 32 is provided in a semi-spherical structure.

[0044] It should be noted that one end of the slide groove 31 is arranged in an arc-shaped structure that gradually expands from the outside to the inside, and the limit block 32 abuts against the through hole at one end of the slide groove 31 .

[0045] The working principle and use process of the utility model are as follows: by arranging an adjustment component 2 on the sleeve body 1, when in use, the position of the adjustment plate a21 is driven to move in the square groove opened in the sleeve body 1 by rotating the first screw rod 22, and cooperate with the second screw rod 26 and the adjustment plate b27. By rotating the first screw rod 22 and the second screw rod 26, the position movement of the adjustment plate a21 and the adjustment plate b27 can be realized, making the use more flexible, and the internal space of the square groove can be adjusted according to the size of the joint of the electric wrench and then engaged, with strong flexibility. The two adjustment plates a21 slide on the surfaces of the two adjustment plates b27, and the adjustment plates a21 and b27 are arranged in a cross-stacked manner. Through this design, the use flexibility of the sleeve body 1 can be greatly improved. By adjusting the adjustment plates a2 1 and the position of the adjusting plate b27, the size of the square groove in the sleeve body 1 is adjusted, and the use is more convenient. By opening the groove 25, the adjusting plate a21 can be retracted into the groove 25 when not in use. By installing stabilizing blocks 23 at both ends of the adjusting plate a21, the stabilizing blocks 23 are engaged in the guide groove 24 when in use, the use stability of the adjusting plate a21 can be further improved, and the use effect is good. When used in conjunction with the limiting component 3, a tension spring 34 is set in the opened slide groove 31, and the limiting block 32 with a semi-spherical structure on the limiting plate 33 is squeezed under the tension of the tension spring 34 to squeeze the square block, thereby realizing that the sleeve body 1 is limited to the surface of the square block, avoiding the sleeve body 1 from falling off when the bolt is tightened, improving the stability during operation, and having high safety in use.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A special sleeve for connecting bolts between a top cover and a seat ring of a hydropower unit, comprising a sleeve body (1), characterized in that: It also includes an adjustment component (2) arranged in the sleeve body (1); The adjustment assembly (2) comprises an adjustment plate a (21) symmetrically arranged on the surface of the sleeve body (1) and a first screw (22) threadedly connected to a threaded hole a symmetrically opened on the surface of the sleeve body (1), wherein the first screw (22) passes through the sleeve body (1) and is connected to the adjustment plate a (21) arranged in the sleeve body (1), and a second screw (26) is threadedly connected to a threaded hole b symmetrically opened on the surface of the sleeve body (1), and one end of the second screw (26) passes through the sleeve body (1) and is connected to the surface of the adjustment plate b (27) arranged in the sleeve body (1).

2. The special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit according to claim 1, characterized in that: The two adjustment plates a (21) slide on the surfaces of the two adjustment plates b (27), and the adjustment plates a (21) and the adjustment plates b (27) are arranged in a cross-over and overlapping manner.

3. The special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit according to claim 1, characterized in that: The inner wall of the sleeve square groove formed on the surface of the sleeve body (1) is symmetrically provided with a groove (25) adapted to the adjustment plate a (21), and the adjustment plate a (21) slides in the sleeve body (1) through the groove (25).

4. The special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit according to claim 1, characterized in that: The surface of the adjustment plate a (21) is symmetrically mounted with a stabilizing block (23); the inner wall of a square groove provided inside the sleeve body (1) is provided with a guide groove (24) adapted to the stabilizing block (23); the adjustment plate a (21) slides inside the sleeve body (1) through the guide groove (24) and the stabilizing block (23).

5. The special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit according to claim 1, characterized in that: The sleeve body (1) further comprises a limit assembly (3) arranged in a square groove provided on the other side surface of the sleeve body (1), the limit assembly (3) comprising a slide groove (31) symmetrically provided on the inner wall of the square groove provided on the sleeve body (1), a limit block (32) provided in the slide groove (31) provided on the sleeve body (1), and a limit plate (33) installed on the surface of the limit block (32), the limit plate (33) sliding in the slide groove (31), the slide groove (31) provided on the sleeve body (1) is provided with a tension spring (34), one end of the tension spring (34) abuts against the limit plate (33), and the other end of the tension spring (34) abuts against the slide groove (31).

6. The special sleeve for connecting bolts between the top cover and the seat ring of a hydropower unit according to claim 5, characterized in that: The limiting block (32) is arranged in a semi-spherical structure.

7. The special sleeve for connecting bolts between the top cover and the seat ring of a hydroelectric generator set according to claim 5, characterized in that: One end of the slide groove (31) is arranged in an arc-shaped structure that gradually expands from the outside to the inside, and the limit block (32) abuts against a through hole at one end of the slide groove (31).

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