Lifting device for main steam valve of steam turbine

Abstract

The utility model relates to the technical field of hoisting devices, in particular to a hoisting device for a main steam valve of a steam turbine, which comprises a base, a hoisting frame and a pulling piece, the hanging bracket comprises a fixing part and a hoisting part, the fixing part is fixedly connected with the base, the hoisting part is arranged at the upper end of the fixing part, and the hoisting part is connected with hoisting equipment; the pulling piece is arranged on the hanging bracket and comprises a handheld part, and the orientation of the handheld part is consistent with the pulling-away direction of the valve deck. According to the hoisting device for the main steam valve of the steam turbine, the base is fixedly connected with the valve cover, the hoisting equipment is connected to the hoisting frame, and meanwhile, the handheld part of the pulling piece is pulled, so that the valve cover can be conveniently pulled out of the valve seat and then hoisted to the ground, and disassembly and maintenance of the main steam valve are completed.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a lifting device for a main steam valve of a steam turbine. Background Art

[0002] The high-pressure main steam valve of a nuclear power turbine is an important component of the turbine's steam inlet system. If it fails, it will directly cause the turbine to shut down. To ensure the availability of the main steam valve, it needs to be disassembled and inspected regularly. The valve core assembly needs to be extracted from the main steam valve assembly, and its surface needs to be cleaned and inspected for penetration. The prerequisite for extracting the valve core assembly from the main steam valve assembly is to remove the main steam valve bonnet with the main steam valve assembly from the valve seat and then hoist it to the ground for disassembly and maintenance. Since the main steam valve bonnet is installed horizontally on the main steam valve seat and the bonnet assembly weighs nearly 3.6 tons, it requires special lifting equipment for lifting. Therefore, a turbine main steam valve lifting device is urgently needed. Utility Model Content

[0003] The utility model aims to provide a main steam valve hoisting device for a steam turbine, so as to pull the valve cover away from the valve seat and hoist it to the ground, thereby ensuring the disassembly and maintenance of the main steam valve.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] The steam turbine main steam valve hoisting device includes:

[0006] A base, the base being used to connect with the valve cover;

[0007] A hanger, comprising a fixing portion and a lifting portion, wherein the fixing portion is fixedly connected to the base, the lifting portion is provided at an upper end of the fixing portion, and the lifting portion is used to be connected to a lifting device;

[0008] A pulling member is provided on the hanger, and the pulling member includes a hand grip portion, the direction of the hand grip portion is consistent with the direction of the valve cover being pulled out.

[0009] Furthermore, a first connecting hole is provided on the base, a first threaded hole corresponding to the first connecting hole is provided on the valve cover, and the fastening assembly fixedly connects the base and the valve cover through the first connecting hole and the first threaded hole.

[0010] Furthermore, the fastening assembly includes a stud and a first nut matched with the stud.

[0011] Furthermore, a plurality of first connection holes are provided, and the plurality of first connection holes are arranged at intervals on the base, and the fastening components are arranged in a one-to-one correspondence with the first connection holes.

[0012] Furthermore, the pulling member also includes a connecting portion, which is fixed to one end of the hand-grip portion. A second connecting hole is provided on the hanger, and the connecting portion is inserted into the second connecting hole to fix the pulling member on the hanger.

[0013] Furthermore, the pulling member is a lifting eye bolt, the second connecting hole is a second threaded hole, the lifting eye bolt is screwed to the second threaded hole, and the direction of the lifting eye on the lifting eye bolt is consistent with the withdrawal direction of the valve cover.

[0014] Furthermore, a through hole is provided on the hoisting portion, and the through hole is used to hook a shackle, and the shackle is used to be connected to the hoisting equipment.

[0015] Furthermore, the base is connected to the hanger by welding.

[0016] Furthermore, a support block is provided between the base and the hanger, and the support block is welded to the base and the hanger respectively.

[0017] Furthermore, the hanger has a long side wall and a short side wall that are parallel to each other, the fixing portion is arranged on the short side wall, and the hanging portion is arranged on the long side wall.

[0018] Beneficial effects of the utility model:

[0019] The embodiment of the present utility model provides a steam turbine main steam valve lifting device, which includes a base, a hanger and a pulling member, wherein the base is connected to the valve cover; the hanger includes a fixed portion and a lifting portion, the fixed portion is fixedly connected to the base, the lifting portion is arranged at the upper end of the fixed portion, and the lifting portion is connected to the lifting equipment; the pulling member is arranged on the hanger, and includes a hand grip portion, the direction of the hand grip portion is consistent with the direction of the valve cover removal. The steam turbine main steam valve lifting device can conveniently remove the valve cover from the valve seat and lift it to the ground by fixing the base to the valve cover, connecting the lifting equipment to the hanger, and pulling the hand grip portion of the pulling member at the same time, thereby completing the disassembly and maintenance of the main steam valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a steam turbine main steam valve hoisting device fixed to a valve cover provided by an embodiment of the utility model;

[0021] Figure 2 This is a top view of a steam turbine main steam valve hoisting device provided by an embodiment of the utility model;

[0022] Figure 3 It is a side view of a steam turbine main steam valve hoisting device provided by an embodiment of the utility model.

[0023] In the picture:

[0024] 1. Base; 11. First connecting hole; 2. Hanger; 21. Fixing part; 22. Lifting part; 23. Second connecting hole; 24. Through hole; 3. Pulling piece; 31. Hand grip; 32. Connecting part; 4. Fastening assembly; 5. Support block; 100. Main steam valve; 101. Valve cover. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] The following combination Figure 1-Figure 3 The technical solution of the utility model is further illustrated through specific implementation methods.

[0033] The high-pressure main steam valve 100 of a nuclear power turbine is an important component of the turbine's steam inlet system. Therefore, the main steam valve 100 needs to be disassembled and inspected regularly to ensure its availability. During inspection, the valve core assembly needs to be removed from the main steam valve 100, and its surface needs to be cleaned and inspected for penetration. Extracting the valve core assembly from the main steam valve 100 requires that the valve cover 101 with the valve core assembly be removed from the valve seat and then hoisted to the ground for disassembly and inspection. Because the valve cover 101 is horizontally mounted on the valve seat of the main steam valve 100 and is relatively heavy, it cannot be directly removed from the valve seat.

[0034] In order to solve the above problems, an embodiment of the present invention provides a steam turbine main steam valve lifting device, which includes a base 1, a hanger 2 and a pulling member 3, wherein the base 1 is used to connect with the valve cover 101; the hanger 2 includes a fixing portion 21 and a lifting portion 22, the fixing portion 21 is fixedly connected to the base 1, and the lifting portion 22 is arranged at the upper end of the fixing portion 21, and the lifting portion 22 is used to connect with the lifting equipment; the pulling member 3 is arranged on the hanger 2, which includes a hand grip 31, and the direction of the hand grip 31 is consistent with the direction of withdrawal of the valve cover 101. The steam turbine main steam valve lifting device can conveniently pull the valve cover 101 out of the valve seat and lift it to the ground by fixing the base 1 to the valve cover 101, connecting the lifting equipment to the hanger 2, and pulling the hand grip 31 of the pulling member 3 at the same time, thereby completing the disassembly and maintenance of the main steam valve 100.

[0035] In this embodiment, the top of the valve cover 101 is an arc-shaped structure. In order to make the base 1 and the valve cover 101 fit tightly together, the bottom of the base 1 is set to an arc-shaped structure consistent with the shape of the top of the valve cover 101. This setting can increase the stability of the lifting device.

[0036] like Figure 2 As shown, the base 1 is provided with a first connection hole 11, and the valve cover 101 is provided with a first threaded hole corresponding to the first connection hole 11. The fastening assembly 4 fixes the base 1 and the valve cover 101 through the first connection hole 11 and the first threaded hole. The fastening assembly 4 is easy to operate and easy to disassemble. Optionally, in this embodiment, the fastening assembly 4 uses a stud and a nut that cooperates with the stud. One end of the stud passes through the first connection hole 11 and is screwed into the first threaded hole. The nut is screwed to the other end of the stud and abuts against the base 1. The use of the stud and nut can facilitate installation and is highly practical. Alternatively, the fastening assembly 4 can also use a screw, which passes through the first connection hole 11 and is screwed into the first threaded hole.

[0037] Furthermore, a plurality of first connection holes 11 are provided, and the plurality of first connection holes 11 are spaced apart on the base 1, and the fastening components 4 are provided in a one-to-one correspondence with the first connection holes 11. By providing a plurality of first connection holes 11, the connection strength between the base 1 and the valve cover 101 can be improved. Optionally, in this embodiment, four first connection holes 11 are provided, and the four first connection holes 11 are arranged in a matrix on the base 1, and two of the first connection holes 11 are symmetrically arranged on both sides of the hanger 2 with the other two first connection holes 11, further improving the stability of the connection between the base 1 and the valve cover 101.

[0038] In this embodiment, the base 1 and the hanger 2 are connected by welding, and the connection strength between the base 1 and the hanger 2 is high and the sealing of the connection is good. Furthermore, the support block 5 is welded between the base 1 and the hanger 2, which further improves the overall strength of the lifting device structure. Figure 3 As shown, in this embodiment, the support block 5 is in the shape of a triangle, four support blocks 5 are welded between the base 1 and the hanger 2 , and the four support blocks 5 are symmetrically arranged on both sides of the hanger 2 .

[0039] Furthermore, the pulling member 3 also includes a connecting portion 32, which is fixedly arranged at one end of the hand-grip portion 31. The hanger 2 is provided with a second connecting hole 23, and the connecting portion 32 is inserted into the second connecting hole 23 to fix the pulling member 3 on the hanger 2, so as to assist in pulling the valve cover 101 when the valve cover 101 is hoisted. In this embodiment, the pulling member 3 adopts an eyebolt, and the second connecting hole 23 is provided as a second threaded hole. The eyebolt is screwed to the second threaded hole, and the direction of the eye on the eyebolt is consistent with the direction of withdrawal of the valve cover 101. When the valve cover 101 is hoisted, the eyebolt is fixedly arranged on the hanger 2 by screwing the threaded portion of the eyebolt to the second thread. Pulling the eye on the eyebolt assists in withdrawing the valve cover 101 from the valve seat, making the hoisting of the valve cover 101 more convenient.

[0040] In order to facilitate the connection between the turbine main steam valve hoisting device and the hoisting equipment, such as Figure 1 As shown, the hanger 2 is provided with a through hole 24, which can be hooked with a shackle, and the hanger 2 is connected to the lifting equipment via the shackle, facilitating the lifting of the valve cover 101. Optionally, multiple through holes 24 are provided, and the multiple through holes 24 are arranged at intervals along the horizontal direction on the hanger 2. This ensures that the hanger 2 is evenly stressed when the valve cover 101 is lifted, thereby improving the stability of the lifting device during use. In this embodiment, three through holes 24 are provided, and the three through holes 24 are arranged at intervals along the horizontal direction at the upper end of the hanger 2, and the spacing between two adjacent through holes is consistent.

[0041] In this embodiment, the hanger 2 has a long side wall and a short side wall parallel to each other, the fixing part 21 is arranged on the short side wall, the short side wall is fixedly arranged on the base 1, the lifting part 22 is arranged on the long side wall, the long side wall is connected to the lifting equipment, and the middle part where the long side wall and the short side wall are connected has a hollow structure, which further increases the stability of the lifting device.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The main steam valve hoisting device of the steam turbine is characterized by: include: A base (1), the base (1) being used to connect with the valve cover (101); A hanger (2), the hanger (2) comprising a fixing portion (21) and a hoisting portion (22), the fixing portion (21) being fixedly connected to the base (1), the hoisting portion (22) being arranged at an upper end of the fixing portion (21), and the hoisting portion (22) being used to connect to a hoisting device; A pulling member (3), the pulling member (3) being arranged on the hanger (2), the pulling member (3) comprising a hand grip (31), the direction of the hand grip (31) being consistent with the direction of pulling out the valve cover (101); The pulling member (3) further comprises a connecting portion (32), wherein the connecting portion (32) is fixedly arranged at one end of the hand-grip portion (31), and a second connecting hole (23) is provided on the hanger (2), and the connecting portion (32) is inserted into the second connecting hole (23), so that the pulling member (3) is fixedly arranged on the hanger (2); The pulling member (3) is a lifting eye bolt, the second connecting hole (23) is a second threaded hole, the lifting eye bolt is screwed to the second threaded hole, and the direction of the lifting eye on the lifting eye bolt is consistent with the direction of withdrawal of the valve cover (101).

2. The steam turbine main steam valve hoisting device according to claim 1, characterized in that: The base (1) is provided with a first connection hole (11), the valve cover (101) is provided with a first threaded hole corresponding to the first connection hole (11), and the fastening assembly (4) fixedly connects the base (1) and the valve cover (101) via the first connection hole (11) and the first threaded hole.

3. The steam turbine main steam valve hoisting device according to claim 2, characterized in that: The fastening assembly (4) comprises a stud and a first nut matched with the stud.

4. The steam turbine main steam valve hoisting device according to claim 2, characterized in that: A plurality of the first connection holes (11) are provided, and the plurality of the first connection holes (11) are arranged at intervals on the base (1), and the fastening components (4) are arranged in a one-to-one correspondence with the first connection holes (11).

5. The steam turbine main steam valve hoisting device according to any one of claims 1 to 4, characterized in that: The hoisting portion (22) is provided with a through hole (24), the through hole (24) is used for hooking a shackle, and the shackle is used for connecting with the hoisting equipment.

6. The steam turbine main steam valve hoisting device according to any one of claims 1 to 4, characterized in that: The base (1) is connected to the hanger (2) by welding.

7. The steam turbine main steam valve hoisting device according to claim 6, characterized in that: A support block (5) is provided between the base (1) and the hanger (2), and the support block (5) is welded to the base (1) and the hanger (2) respectively.

8. The steam turbine main steam valve hoisting device according to any one of claims 1 to 4, characterized in that: The hanger (2) has a long side wall and a short side wall that are parallel to each other; the fixing portion (21) is arranged on the short side wall; and the hanging portion (22) is arranged on the long side wall.

Images