Shaft turning tool for manual turning gear of steam turbine of nuclear power plant

Abstract

The utility model discloses a shaft turning tool for a manual turning gear of a steam turbine of a nuclear power plant, which comprises a columnar main body, and the length of the columnar main body is 1000mm-1500mm; one end of the columnar main body in the length direction is provided with a sleeving groove used for being connected with an operating lever of a manual turning gear of a nuclear power plant steam turbine, the sleeving groove and the columnar main body are coaxially arranged, the depth of the sleeving groove is 150mm, the outer diameter of the sleeving groove is 57mm, and the inner diameter of the sleeving groove is 45mm. The shaft coiling tool for the manual barring gear of the nuclear power plant steam turbine fills the blank of special tools, solves the problems that when an original working barring / hydraulic barring (oil motor) breaks down, a steam turbine rotor is in a hot state (start-stop stage), and avoids bending deformation caused by uneven cold and heat of the steam turbine rotor; the shaft turning tool for the manual turning gear of the steam turbine of the nuclear power plant is relatively simple in structure, convenient to operate, time-saving and labor-saving in application and capable of improving working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a shaft turning tool used for a manual turning device of a steam turbine in a nuclear power plant. Background Art

[0002] A nuclear power steam turbine is a single-shaft, three-cylinder, four-exhaust condensing half-speed nuclear power steam turbine, which is equipped with a nuclear power plant steam turbine manual turning device 20, such as Figure 1 and Figure 2 As shown, the manual turning device 20 of the nuclear power plant steam turbine is used to drive the rotor to rotate. The manual turning device 20 of the nuclear power plant steam turbine includes a bearing seat 21. The bearing seat 21 is provided with a flange 22. The flange 22 is connected to the flange cover 23 by a fastener 24. A gasket 25 is provided between the flange cover 23 and the flange 22. An operating lever 26 is provided in the bearing seat 21. The operating lever 26 is provided with a pawl 27. The pawl 27 is used to cooperate with a gear 28 on the rotor to drive the gear 28 to rotate, and then drive the rotor to rotate. The manual turning device 20 of the nuclear power plant steam turbine also includes a block 29 used to fix the operating lever 26.

[0003] When the staff needs to manually operate the nuclear power plant steam turbine manual turning device 20, such as manually operating the joystick 26, it is inconvenient for the staff to operate directly by hand due to the small opening space of the flange 22. In addition, operating the joystick 26 requires great strength, and manual operation is time-consuming and labor-intensive, affecting work efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a shaft turning tool for a manual turning device of a steam turbine in a nuclear power plant.

[0005] The technical solution adopted by the utility model to solve the technical problem is: constructing a shaft turning tool for a manual turning device of a nuclear power plant steam turbine, comprising a columnar body, the length of the columnar body being 1000mm-1500mm;

[0006] One end of the columnar body in the longitudinal direction is provided with a socket groove for connecting to the joystick of the manual turning device of the nuclear power plant turbine. The socket groove is coaxially arranged with the columnar body. The depth of the socket groove is 150 mm, the outer diameter of the socket groove is 57 mm, and the inner diameter of the socket groove is 45 mm.

[0007] In some embodiments, the columnar body includes a first shaft portion and a second shaft portion that are axially connected, and the first shaft portion and the second shaft portion are coaxially arranged;

[0008] The first shaft portion is provided with the sleeve groove.

[0009] In some embodiments, the axial length of the first shaft portion is 800 mm.

[0010] In some embodiments, the axial length of the second shaft portion is 500 mm.

[0011] In some embodiments, the diameter of the second shaft portion is 40 mm.

[0012] In some embodiments, the shaft turning tool for the manual turning device of a nuclear power plant steam turbine further includes an anti-slip sleeve sleeved on the second shaft portion.

[0013] In some embodiments, the surface roughness of the columnar body is Ra3.2.

[0014] In some embodiments, the columnar body is a metal member.

[0015] In some embodiments, the columnar body is made of 45-gauge steel.

[0016] In some embodiments, the columnar body is a one-piece structure.

[0017] The implementation of the utility model has the following beneficial effects: the shaft turning tool for the manual turning device of the steam turbine in a nuclear power plant fills the gap in special tools, and solves the problem that the original working turning / hydraulic turning (oil motor) fails and the turbine rotor is in a hot state (start-up and shutdown stage), avoiding bending and deformation of the turbine rotor due to uneven heating and cooling. In addition, the shaft turning tool for the manual turning device of the steam turbine in a nuclear power plant has a relatively simple structure, is easy to operate, saves time and effort, and can improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of a manual turning device for a nuclear power plant steam turbine in the related art;

[0020] Figure 2 It is a structural schematic diagram of a manual turning device for a nuclear power plant steam turbine in the related art;

[0021] Figure 3 It is a structural schematic diagram of a shaft turning tool for a manual turning device of a steam turbine in a nuclear power plant in some embodiments of the present invention. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0023] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0025] See Figure 3 The utility model shows a shaft turning tool 10 for a manual turning device of a nuclear power plant turbine, including a columnar body 11. The length of the columnar body 11 is 1000mm-1500mm. The length of the columnar body 11 can be 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, or 1500mm. Of course, the length of the columnar body 11 can be adjusted according to actual needs and is not specifically limited here.

[0026] One end of the columnar body 11 is provided with a socket 12 for connecting to the joystick of the manual turning device of the nuclear power plant steam turbine. The socket 12 is a generally cylindrical groove, coaxially arranged with the columnar body 11, with a depth of 150 mm, an outer diameter of 57 mm, and an inner diameter of 45 mm. In some embodiments, one end of the columnar body 11 is further provided with a tapered groove connected to the socket 12. The tapered groove is used to collect some gas when the socket 12 is connected to the joystick, thereby balancing the gas pressure.

[0027] In some embodiments, the columnar body 11 includes an axially connected first shaft portion 111 and a second shaft portion 112. The first shaft portion 111 and the second shaft portion 112 can both be substantially cylindrical. The first shaft portion 111 and the second shaft portion 112 are coaxially arranged, and the first shaft portion 111 is provided with the sleeve groove 12. The first shaft portion 111 can serve as a connecting structure, and the second shaft portion 112 can serve as an operating structure.

[0028] In some embodiments, the axial length of the first shaft portion 111 is 800 mm, and the axial length of the second shaft portion 112 is 500 mm.

[0029] In some embodiments, the second shaft portion 112 is cylindrical, and the diameter of the second shaft portion 112 is 40 mm.

[0030] In some embodiments, the shaft turning tool 10 for a manual turning device of a nuclear power plant steam turbine further includes an anti-slip sleeve, such as a silicone protective sleeve, sleeved on the second shaft portion 112 .

[0031] In some embodiments, the surface roughness of the columnar body 11 is Ra3.2.

[0032] In some embodiments, the columnar body 11 is a metal member.

[0033] In some embodiments, the columnar body 11 is made of 45-gauge steel, which has excellent physical properties: (1) Strength and hardness: 45-gauge steel has high strength and hardness, and can withstand large loads and long-term stress. (2) Wear resistance: This steel has good wear resistance and can withstand the test of friction and wear, and is suitable for occasions that need to withstand large friction and wear.

[0034] Of course, the columnar body 11 can also be made of other metal materials, which is not specifically limited here.

[0035] In some embodiments, the columnar body 11 is an integral structure.

[0036] Combine Figures 1 to 3 As shown, the shaft turning tool 10 for the manual turning device of the steam turbine in a nuclear power plant is used as follows: use a No. 18 wrench to remove the fastener 24 (fastening bolt), use a flat-blade screwdriver to remove the flange cover 23, remove the gasket 25, hold the operating lever 26 with your left hand, connect the socket groove 12 of the shaft turning tool 10 for the manual turning device of the steam turbine in a nuclear power plant to the operating lever 26, press and operate the shaft turning tool 10 for the manual turning device of the steam turbine in a nuclear power plant to manually turn the shaft. After completion, one staff member holds the operating lever 26, and the other staff member removes the shaft turning tool 10 for the manual turning device of the steam turbine in a nuclear power plant, pushes the operating lever 26 to the top, lowers the block 29 to fix the operating lever 26, and reinstalls the gasket 25 and the flange cover 23.

[0037] It can be understood that the shaft turning tool 10 for the manual turning device of the steam turbine in a nuclear power plant fills the gap in special tools. It solves the problem that when the original working turning / hydraulic turning (oil motor) fails, the turbine rotor is in a hot state (start-up and shutdown stage), and avoids the bending and deformation of the turbine rotor due to uneven heating and cooling. In addition, the shaft turning tool 10 for the manual turning device of the steam turbine in a nuclear power plant has a relatively simple structure, is easy to operate, saves time and effort, and can improve work efficiency.

[0038] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A shaft turning tool for a manual turning device of a nuclear power plant steam turbine, characterized in that: It comprises a columnar main body (11), wherein the length of the columnar main body (11) is 1000mm-1500mm; One end of the columnar body (11) in the longitudinal direction is provided with a sleeve groove (12) for connecting to a joystick of a manual turning device of a nuclear power plant steam turbine. The sleeve groove (12) is coaxially arranged with the columnar body (11). The depth of the sleeve groove (12) is 150 mm, the outer diameter of the sleeve groove (12) is 57 mm, and the inner diameter of the sleeve groove (12) is 45 mm.

2. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 1, characterized in that: The columnar body (11) comprises a first shaft portion (111) and a second shaft portion (112) connected axially, wherein the first shaft portion (111) and the second shaft portion (112) are coaxially arranged; The first shaft portion (111) is provided with the sleeve groove (12).

3. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 2, characterized in that: The axial length of the first shaft portion (111) is 800 mm.

4. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 2, characterized in that: The axial length of the second shaft portion (112) is 500 mm.

5. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 2, characterized in that: The diameter of the second shaft portion (112) is 40 mm.

6. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 2, characterized in that: The shaft turning tool for a manual turning device of a nuclear power plant steam turbine further comprises an anti-slip sleeve sleeved on the second shaft portion (112).

7. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 1, characterized in that: The surface roughness of the columnar body (11) is Ra3.

2.

8. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 1, characterized in that: The columnar body (11) is a metal part.

9. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 7, characterized in that: The material of the columnar body (11) is 45 steel.

10. The shaft turning tool for manual turning device of nuclear power plant steam turbine according to claim 7, characterized in that: The columnar body (11) is an integrated structure.

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