Wrench special for gland nut of steam turbine valve

Abstract

The utility model relates to the technical field of steam turbine overhaul tools, in particular to a wrench special for a steam turbine valve gland nut. Comprising a first cylinder arranged at the top of a compression nut, an opening is formed in the bottom end of the first cylinder, a plurality of clamping grooves distributed in an annular array mode are formed in the top of the compression nut, clamping keys are installed in the clamping grooves in a sliding mode, the clamping keys are fixed to the bottom end of the first cylinder, and the first cylinder is sleeved with a second cylinder in a sliding mode; handles are fixedly mounted on the two sides of the second cylinder, rectangular through grooves are formed in the inner walls of the two sides of the first cylinder in a penetrating mode, and a cross rod is fixedly mounted in the second cylinder and slidably penetrates through the two rectangular through grooves. Through a simple adjusting structure, the length of the wrench special for the turbine valve compression nut can be adjusted conveniently, the wrench can adapt to valve compression nuts at different spatial positions conveniently, the compression nuts in a narrow space can be disassembled, and the application range is effectively expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine maintenance tools, in particular to a special spanner for tightening nuts of steam turbine valves. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto the blades, causing the rotor equipped with the blade row to rotate and perform work externally. A steam turbine is the main equipment of a modern thermal power plant and is also used in the metallurgical industry, the chemical industry, and ship power devices. During the overhaul process, it is often necessary to disassemble and overhaul the compression nut of the intake valve, so a special wrench is required to disassemble the compression nut. The prior art discloses a special wrench for a steam turbine valve compression nut with an authorization announcement number of CN219444917U, comprising: a supporting part, a connecting part, a force-bearing part, and an adjusting part. The connecting part is arranged on the supporting part, and is used to fix the special wrench to the compression nut. The force-bearing part is arranged on the supporting part, and is spaced apart from the connecting part, and is used to apply torque to the supporting part. The adjusting part is arranged on the supporting part, and is spaced apart from the force-bearing part, and is used to align the central axis of the compression nut with the central axis of the valve when the central axis of the compression nut deviates from the central axis of the valve. When the special wrench disclosed in the present invention is used, after discovering that the central axis of the clamping nut deviates from the central axis of the valve, the position of the central axis of the clamping nut can be adjusted through the adjustment part so that the central axis of the clamping nut can be aligned with the central axis of the valve, thereby ensuring that the clamping nut will not get stuck during the disassembly process, thereby improving the disassembly efficiency of the clamping nut.

[0003] However, it was found during use that the above design is not convenient for length adjustment, which makes it inconvenient to adapt to valve clamping nuts in different spatial positions, and it is difficult to disassemble and assemble valve clamping nuts in a small space, so the scope of application is limited. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a special wrench for turbine valve tightening nuts, which is convenient for adjusting the length of the special wrench for turbine valve tightening nuts, convenient for adapting to valve tightening nuts in different spatial positions, and can remove tightening nuts in a narrow space, effectively expanding the scope of application and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a special wrench for a turbine valve clamping nut, comprising a first cylinder arranged on the top of the clamping nut, the bottom end of the first cylinder being an opening, a plurality of slots arranged in a ring array being provided on the top of the clamping nut, a key being slidably installed in the slot, the key being fixed to the bottom end of the first cylinder, a second cylinder being slidably sleeved on the first cylinder, handles being fixedly installed on both sides of the second cylinder, rectangular through grooves penetrating the inner walls on both sides of the first cylinder, a cross bar being fixedly installed in the second cylinder, the cross bar slidingly penetrating the two rectangular through grooves, a screw being rotatably installed on the second cylinder, the screw rotatably penetrating the cross bar, the screw being threadedly installed on the first cylinder.

[0006] In order to effectively prevent the wrench from slipping when turning the compression nut:

[0007] As a further improvement of the above technical solution: the first cylinder also includes a limiting cylinder, the limiting cylinder is slidably sleeved on the first cylinder, the clamping nut is slidably connected to the inner wall of the limiting cylinder, the first cylinder is rotatably installed with a rotating cylinder, the rotating cylinder is rotatably connected to the top of the limiting cylinder, an annular thread groove is opened on the outer wall of the first cylinder, an internal thread cylinder clamp is installed with the inner thread of the annular thread groove, and the internal thread cylinder clamp is fixedly installed in the rotating cylinder.

[0008] The beneficial effect of this improvement is that through such an arrangement, the wrench and the clamping nut are effectively connected, and the problem of slipping when the wrench turns the clamping nut can be effectively prevented, which greatly facilitates the installation and disassembly of the valve clamping nut.

[0009] In order to facilitate the support and limitation of the screw rod:

[0010] As a further improvement of the above technical solution: a first through hole is penetrated on the top inner wall of the second cylinder, and the screw rod rotates and penetrates the first through hole.

[0011] The beneficial effect of this improvement is that by providing the first through hole, it is convenient to support and limit the screw rod.

[0012] In order to facilitate the limiting of the screw rod:

[0013] As a further improvement of the above technical solution: a second through hole is passed through the cross bar, and the screw rod rotates through the second through hole.

[0014] The beneficial effect of this improvement is that by providing the second through hole, it is convenient to limit the position of the screw rod.

[0015] In order to facilitate the screw to drive the first cylinder to move:

[0016] As a further improvement of the above technical solution: a threaded through hole is penetrated on the top inner wall of the first cylinder, and the screw thread penetrates the threaded through hole.

[0017] The beneficial effect of this improvement is that by providing the threaded through hole, it is convenient for the screw rod to drive the first cylinder to move.

[0018] In order to facilitate the rotation connection between the limit cylinder and the rotating cylinder:

[0019] As a further improvement of the above technical solution: an annular groove is provided at the top of the limiting cylinder, an annular clamping block is rotatably installed in the annular groove, and the annular clamping block is fixed at the bottom end of the rotating cylinder.

[0020] The beneficial effect of this improvement is that the annular clamping groove and the annular clamping block are provided, thereby facilitating the rotational connection between the limiting cylinder and the rotating cylinder.

[0021] To prevent hand slipping when rotating the drum:

[0022] As a further improvement of the above technical solution: the fixed sleeve on the rotating drum is provided with an anti-slip sleeve, and the material of the anti-slip sleeve is rubber.

[0023] The beneficial effect of this improvement is that by providing the anti-slip sleeve, the hand slipping problem when rotating the drum can be effectively prevented.

[0024] In order to facilitate the limiting of the limiting cylinder:

[0025] As a further improvement of the above technical solution: limiting grooves are provided on both sides of the first cylinder, limiting blocks are slidably installed in the limiting grooves, and the limiting blocks are fixed on the inner wall of the limiting cylinder.

[0026] The beneficial effect of this improvement is that by providing the limiting groove and the limiting block, it is convenient to limit the limiting cylinder.

[0027] The beneficial effects of the utility model are: through a simple adjustment structure, it is convenient to adjust the length of the special wrench for removing the turbine valve clamping nut, thereby facilitating the adaptation of valve clamping nuts in different spatial positions, and being able to remove the clamping nuts in a narrow space, effectively expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0030] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0031] Figure 4 For this utility model Figure 1 A schematic diagram of the enlarged structure of part B;

[0032] Figure 5 It is a schematic diagram of the three-dimensional sectional assembly structure of the limiting cylinder, the rotating cylinder and the internal thread clamp in the utility model.

[0033] In the figure: 1, clamping nut; 2, first cylinder; 3, slot; 4, key; 5, second cylinder; 6, handle; 7, rectangular through slot; 8, cross bar; 9, screw rod; 10, limit cylinder; 11, rotating cylinder; 12, annular thread groove; 13, internal thread cylinder clamp. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0035] like Figure 1-5As shown, a special wrench for a tightening nut of a steam turbine valve comprises a first cylinder 2 arranged on the top of a tightening nut 1, the bottom end of the first cylinder 2 is open, a plurality of slots 3 arranged in a ring array are provided on the top of the tightening nut 1, a key 4 is slidably installed in the slot 3, the key 4 is fixed to the bottom end of the first cylinder 2, a second cylinder 5 is slidably sleeved on the first cylinder 2, handles 6 are fixedly installed on both sides of the second cylinder 5, rectangular through grooves 7 are penetrated on the inner walls of both sides of the first cylinder 2, a cross bar 8 is fixedly installed in the second cylinder 5, the cross bar 8 slides through two rectangular through grooves 7, a screw rod 9 is rotatably installed on the second cylinder 5, the screw rod 9 rotates through the cross bar 8, the screw rod 9 rotates through the cross bar 8, the screw rod 9 9 is threadedly installed on the first cylinder 2. Through a simple adjustment structure, it is convenient to adjust the length of the special wrench for the turbine valve clamping nut, so as to adapt to the valve clamping nut in different spatial positions. It can remove the clamping nut in a narrow space, effectively expanding the scope of application. The first cylinder 2 also includes a limiting cylinder 10, which is slidably sleeved on the first cylinder 2. The clamping nut 1 is slidably connected to the inner wall of the limiting cylinder 10. The first cylinder 2 is rotatably installed with a rotating cylinder 11, and the rotating cylinder 11 is rotatably connected to the top of the limiting cylinder 10. An annular thread groove 12 is opened on the outer wall of the first cylinder 2. An internal thread cylinder clamp 13 is installed on the internal thread of the annular thread groove 12. The internal threaded tube clamp 13 is fixedly installed in the rotating cylinder 11. Through such an arrangement, it is convenient to effectively connect the wrench and the clamping nut, and can effectively prevent the wrench from slipping when the clamping nut is turned, which greatly facilitates the assembly and disassembly of the valve clamping nut. A first through hole is penetrated on the top inner wall of the second cylinder 5, and the screw rod 9 rotates and penetrates the first through hole. By setting the first through hole, it is convenient to support and limit the screw rod 9. A second through hole is penetrated on the cross bar 8, and the screw rod 9 rotates and penetrates the second through hole. By setting the second through hole, it is convenient to limit the screw rod 9. A threaded through hole is penetrated on the top inner wall of the first cylinder 2, and the screw rod 9 threadably penetrates the threaded through hole. By setting the threaded through hole , so that it is convenient for the screw rod 9 to drive the first cylinder 2 to move. An annular groove is provided at the top of the limit cylinder 10, and an annular block is rotatably installed in the annular groove. The annular block is fixed to the bottom end of the rotating cylinder 11. By setting the annular groove and the annular block, it is convenient for the limit cylinder 10 to be rotatably connected with the rotating cylinder 11. An anti-slip sleeve is fixed on the rotating cylinder 11. The material of the anti-slip sleeve is rubber. By setting the anti-slip sleeve, it is possible to effectively prevent the problem of hand slipping when rotating the rotating cylinder 11. Limiting grooves are provided on both sides of the first cylinder 2, and limiting blocks are slidably installed in the limiting grooves. The limiting blocks are fixed on the inner wall of the limiting cylinder 10. By setting the limiting grooves and the limiting blocks, it is convenient to limit the limiting cylinder 10.

[0036] The working principle of the utility model is as follows: when in use, the screw rod 9 is first rotated, and the screw rod 9 drives the first cylinder 2 to slide out or enter the second cylinder 5, so that the cross bar 8 is driven to slide in the two rectangular through grooves 7, until the first cylinder 2 extends out or enters the second cylinder 5 to a suitable position, so that the length of the wrench is adjusted. Through such an arrangement, it is convenient to adjust the length of the special wrench for the tightening nut of the turbine valve, and then it is convenient to adapt to the tightening nuts of valves in different spatial positions, and the tightening nuts in a narrow space can be removed, which effectively expands the scope of application. Then, the rotating drum 11 is rotated, so that the rotating drum 11 is driven to rotate on the first cylinder 2, and at the same time, the rotating drum 11 drives the internal threaded drum clamp 13 to rotate and descend in the annular thread groove 12, and at the same time, the internal thread The cylinder clamp 13 drives the rotating cylinder 11 to slide and descend on the first cylinder 2, so that the limiting cylinder 10 is pushed to slide and descend on the first cylinder 2 until the limiting cylinder 10 is slidably mounted on the clamping nut 1, and then the second cylinder 5 is pressed down, so that the first cylinder 2 is driven to descend, and multiple keys 4 are driven to slide into the corresponding slots 3 on the clamping nut 1 respectively, and then the two handles 6 can be rotated to drive the second cylinder 5 to rotate, and the second cylinder 5 drives the first cylinder 2 to rotate, and multiple keys 4 of the first cylinder 2 rotate, thereby driving the clamping nut 1 to rotate. Through such a configuration, it is convenient to effectively connect the wrench and the clamping nut, and can effectively prevent the wrench from slipping when the clamping nut is rotated, which greatly facilitates the assembly and disassembly of the valve clamping nut.

[0037] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A special wrench for a steam turbine valve compression nut, comprising a first cylinder (2) arranged on the top of a compression nut (1), wherein the bottom end of the first cylinder (2) is open, and characterized in that: The top of the clamping nut (1) is provided with a plurality of grooves (3) arranged in a circular array, a key (4) is slidably installed in the groove (3), and the key (4) is fixed to the bottom end of the first cylinder (2). A second cylinder (5) is slidably sleeved on the first cylinder (2), and handles (6) are fixedly installed on both sides of the second cylinder (5). Rectangular through grooves (7) are penetrated on the inner walls of both sides of the first cylinder (2), and a cross bar (8) is fixedly installed in the second cylinder (5), and the cross bar (8) slides through the two rectangular through grooves (7). A screw rod (9) is rotatably installed on the second cylinder (5), and the screw rod (9) rotatably penetrates the cross bar (8), and the screw rod (9) is threadedly installed on the first cylinder (2).

2. The special wrench for tightening nut of steam turbine valve according to claim 1, characterized in that: The first cylinder (2) further comprises a limiting cylinder (10), wherein the limiting cylinder (10) is slidably sleeved on the first cylinder (2), the clamping nut (1) is slidably connected to the inner wall of the limiting cylinder (10), the first cylinder (2) is rotatably mounted with a rotating cylinder (11), the rotating cylinder (11) is rotatably connected to the top end of the limiting cylinder (10), an annular thread groove (12) is provided on the outer wall of the first cylinder (2), an internal thread cylinder clamp (13) is installed in the internal thread of the annular thread groove (12), and the internal thread cylinder clamp (13) is fixedly mounted in the rotating cylinder (11).

3. The special wrench for tightening nut of steam turbine valve according to claim 1, characterized in that: A first through hole is formed on the inner wall of the top of the second cylinder (5), and the screw rod (9) rotates and passes through the first through hole.

4. The special wrench for tightening nut of steam turbine valve according to claim 1, characterized in that: The cross bar (8) is penetrated by a second through hole, and the screw rod (9) rotation rod is penetrated by the second through hole.

5. The special wrench for tightening nut of steam turbine valve according to claim 1, characterized in that: A threaded through hole is penetrated through the top inner wall of the first cylinder (2), and the screw rod (9) is threadedly penetrated through the threaded through hole.

6. The special wrench for tightening nut of steam turbine valve according to claim 2, characterized in that: The top end of the limiting cylinder (10) is provided with an annular clamping groove, in which an annular clamping block is rotatably installed, and the annular clamping block is fixed to the bottom end of the rotating cylinder (11).

7. The special wrench for tightening nut of steam turbine valve according to claim 2, characterized in that: The fixed sleeve on the rotating drum (11) is provided with an anti-slip sleeve, and the material of the anti-slip sleeve is rubber.

8. The special wrench for tightening nut of steam turbine valve according to claim 2, characterized in that: Limiting grooves are provided on both sides of the first cylinder (2), and limiting blocks are slidably installed in the limiting grooves, and the limiting blocks are fixed on the inner wall of the limiting cylinder (10).

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