Force arm wrench for nuclear power plant
By designing a torque wrench for nuclear power plants, the problem of fatigue and hand strain caused by workers directly pressing electric torque wrenches was solved, achieving more stable torque output and reducing workload.
Patent Information
- Application Number
- CN202520610138.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-01
AI Technical Summary
In existing nuclear power plants, workers directly press the electric torque wrench by hand, which can lead to fatigue or hand strain. At the same time, the vibration of the electric torque wrench can cause unstable output torque.
Design a lever arm wrench for nuclear power plants, including a splined socket, a fastener, a first handle, and a first connector. The splined socket is fitted onto the output connector of an electric torque wrench and fixed by the fastener. The handle is threadedly connected to the connector to achieve indirect operation.
It reduces the workload of staff, avoids hand fatigue or strain, and makes the output torque of the electric torque wrench more stable.
Smart Images
Figure CN223917811U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nuclear power tools, and in particular to a lever arm wrench for nuclear power plants. Background Technology
[0002] Existing valve switching methods typically involve manual operation or using an F-type wrench, which places certain demands on the operator's physical strength, power, and skill. Insufficient force prevents the valve from turning, while excessive force can damage it. Applying multiple turns further strains the operator's stamina. Furthermore, different individuals may have varying standards for the force required to open and close valves, easily leading to issues such as "not closing tightly enough, causing leakage," or "closing too tightly, causing overpressure wear and reduced valve life." Therefore, nuclear power plants use electric torque wrenches for valve operation. However, when outputting torque, the electric torque wrench itself vibrates under stress. If operators directly press their hands on the wrench, it can cause fatigue or strain on their hands and arms. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a lever arm wrench for nuclear power plants, so as to solve the problem that workers may suffer from fatigue or hand and arm strain due to directly pressing the electric torque wrench with their hands in related technologies.
[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a nuclear power plant lever arm wrench, including a splined socket, a fastener, a first handle and a first connecting member;
[0005] The splined sleeve is used to fit onto the connecting spline of the output connector of the electric torque wrench. The side wall of the splined sleeve has a through hole penetrating its inner and outer walls. The fastener is used to pass through the through hole to abut against the outer surface of the connecting spline. The side wall of the splined sleeve also has a mounting part with a first threaded groove. The first handle is long and rod-shaped, and a second threaded groove is provided at the first end of the first handle along its length. The first connector includes a first columnar body. The outer surface of the first columnar body is provided with a first external thread and a second external thread at intervals. The first external thread is connected to the first threaded groove, and the second external thread is connected to the second threaded groove, so that the first handle is connected to the splined sleeve.
[0006] In some embodiments, a first annular protrusion is provided radially outward in the middle of the first columnar body. The first annular protrusion defines a first columnar portion and a second columnar portion of the first columnar body. The first columnar portion is provided with the first external thread, and the second columnar portion is provided with the second external thread.
[0007] In some embodiments, the nuclear power plant lever wrench further includes a second handle and a second connector; the second handle is detachably connected to the first handle via the second connector.
[0008] In some embodiments, the second end of the first handle in the length direction is provided with a third threaded groove;
[0009] The second handle is in the shape of a long rod, and the first end of the second handle in the length direction is provided with a fourth threaded groove;
[0010] The second connector includes a second columnar body, and the outer surface of the second columnar body is provided with a third external thread and a fourth external thread spaced apart. The third external thread is connected to the third thread groove, and the fourth external thread is connected to the fourth thread groove.
[0011] In some embodiments, a second annular protrusion is provided radially outward in the middle of the second columnar body, the second annular protrusion defining a third columnar portion and a fourth columnar portion of the second columnar body, the third columnar portion being provided with the third external thread, and the fourth columnar portion being provided with the fourth external thread.
[0012] In some embodiments, the first handle and / or the second handle are hollow structures.
[0013] In some embodiments, the first handle and / or the second handle are solid structures.
[0014] In some embodiments, the first handle and the second handle are of the same length.
[0015] In some embodiments, the first handle is provided with a first protective cover, and the second handle is provided with a second protective cover.
[0016] In some embodiments, the fastener includes a columnar operating portion and a screw portion connected to the end face of the operating portion.
[0017] The present invention has the following advantages: by using this nuclear power plant lever arm wrench, workers do not need to press their hands directly on the electric torque wrench, which can reduce the intensity of work, avoid hand fatigue or strain, and make the output torque of the electric torque wrench more stable. Attached Figure Description
[0018] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0019] Figure 1 This is a structural diagram of an electric torque wrench;
[0020] Figure 2 This is a schematic diagram of the structure of a nuclear power plant lever arm wrench in some embodiments of this utility model;
[0021] Figure 3 This is one of the exploded views of the nuclear power plant lever arm wrench in some embodiments of this utility model;
[0022] Figure 4 This is the second exploded view of the nuclear power plant lever arm wrench in some embodiments of this utility model. Detailed Implementation
[0023] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.
[0024] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0025] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0026] See Figures 2 to 4 This utility model discloses a nuclear power plant lever wrench, including a splined socket 10, a fastener 20, a first handle 30, and a first connector 40.
[0027] The splined sleeve 10 is used to be fitted onto the connecting spline 102 of the output connector 101 of the electric torque wrench 100 (see reference). Figure 1 The spline sleeve 10 has a through hole 11 on its side wall, which extends through its inner and outer walls. The fastener 20 is used to pass through the through hole 11 to abut against the outer side of the connecting spline. The side wall of the spline sleeve 10 also has a mounting part 12, which has a first threaded groove 121. The first handle 30 is in the shape of a long rod, and the first end of the first handle 30 in the length direction has a second threaded groove 31. The first connector 40 includes a first columnar body 41, and the outer surface of the first columnar body 41 is provided with a first external thread and a second external thread at intervals. The first external thread is connected to the first threaded groove 121, and the second external thread is connected to the second threaded groove 31, so that the first handle 30 is connected to the spline sleeve 10.
[0028] When performing valve opening or closing operations at a nuclear power plant, the splined sleeve 10 is fitted onto the connecting spline 102, and then fasteners 20 are used to further secure the splined sleeve 10 to the connecting spline 102. Afterwards, the electric torque wrench 100 is opened, and the operator simply holds the first handle 30. Using this nuclear power plant torque wrench eliminates the need for the operator to directly press their hand on the electric torque wrench 100, reducing workload, preventing hand fatigue or injury, and allowing for more stable torque output from the electric torque wrench 100. The nuclear power plant valves include, but are not limited to, medium-sized valves and large valves, such as medium-sized gate valves and large gate valves.
[0029] In some embodiments, the spline sleeve 10 has a generally cylindrical shape, making the structure of the spline sleeve 10 relatively compact.
[0030] In some embodiments, the through hole 11 may be a threaded hole, and the fastener 20 includes a columnar operating part 21 and a threaded part 22 connected to the end face of the operating part 21. The operating part 21 may be a cylindrical structure, allowing the operator to rotate the operating part 21 more conveniently.
[0031] In some embodiments, the first columnar body 41 is provided with a first annular protrusion 42 radially outward in the middle portion, the first annular protrusion 42 defining the first columnar body 41 into a first columnar portion 411 and a second columnar portion 412, the first columnar portion 411 being provided with the first external thread, and the second columnar portion 412 being provided with the second external thread.
[0032] In some embodiments, the nuclear power plant lever wrench further includes a second handle 50 and a second connector 60; the second handle 50 is detachably connected to the first handle 30 via the second connector 60.
[0033] In some embodiments, the second end of the first handle 30 in the length direction is provided with a third threaded groove 32; the second handle 50 is in the shape of a long rod, and the first end of the second handle 50 in the length direction is provided with a fourth threaded groove 51; the second connector 60 includes a second columnar body 61, the outer surface of the second columnar body 61 is provided with a third external thread and a fourth external thread spaced apart, the third external thread is connected to the third threaded groove 32, and the fourth external thread is connected to the fourth threaded groove 51.
[0034] In some embodiments, the second columnar body 61 is provided with a second annular protrusion 62 radially outward in the middle portion, and the second annular protrusion 62 defines the second columnar body 61 to form a third columnar portion 611 and a fourth columnar portion 612. The third columnar portion 611 is provided with the third external thread, and the fourth columnar portion 612 is provided with the fourth external thread.
[0035] In some embodiments, both the first handle 30 and the second handle 50 may be rod-shaped structures.
[0036] In some embodiments, the first handle 30 and / or the second handle 50 are hollow structures. In some embodiments, the first handle 30 and / or the second handle 50 are solid structures.
[0037] For example, the first handle 30 may be hollow, and the second handle 50 may be solid. Alternatively, both the first handle 30 and the second handle 50 may be solid. Alternatively, both the first handle 30 and the second handle 50 may be hollow. Alternatively, both the first handle 30 and the second handle 50 may be hollow. Preferably, both the first handle 30 and the second handle 50 may be hollow, i.e., they may be cylindrical.
[0038] In some embodiments, the first handle 30 and the second handle 50 are of the same length.
[0039] In some embodiments, the first handle 30 is provided with a first protective sleeve 70, and the second handle 50 is provided with a second protective sleeve 80. The first handle 30 may have a first annular groove, and the first protective sleeve 70 may be disposed within the first annular groove. The second handle 50 may have a second annular groove, and the second protective sleeve 80 may be disposed within the second annular groove. Both the first protective sleeve 70 and the second protective sleeve 80 may be made of silicone or rubber to improve hand grip comfort.
[0040] In some embodiments, the splined sleeve 10, fastener 20, first handle 30, first connector 40, second handle 50, and second connector 60 are detachable and can be disassembled and stored when the nuclear power plant lever arm wrench is not in use, thereby reducing space occupation and facilitating nuclear power plant material management.
[0041] In some embodiments, the first connector 40 and the second connector 60 may have the same structure and specifications to improve versatility.
[0042] In some embodiments, the splined sleeve 10, fastener 20, first handle 30, first connector 40, second handle 50, and second connector 60 may be made of metal, such as stainless steel 316. Of course, the splined sleeve 10, fastener 20, first handle 30, first connector 40, second handle 50, and second connector 60 may also be made of other materials, which are not specifically limited here.
[0043] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.
Claims
1. A force arm wrench for a nuclear power plant, characterized by, The first handle (30) is connected with the spline sleeve (10) through the first connecting piece (40), and the second handle (50) is connected with the first handle (30) through the second connecting piece (60). The spline sleeve (10) is used for sleeving on the connecting spline of the output joint of the electric torque wrench, the side wall of the spline sleeve (10) is provided with a through hole (11) penetrating the inner and outer wall surfaces thereof, the fastener (20) is used for penetrating the through hole (11) to abut against the outer side surface of the connecting spline, the side wall of the spline sleeve (10) is further provided with a mounting portion (12), the mounting portion (12) is provided with a first threaded groove (121), the first handle (30) is in the shape of a long rod, the first end of the first handle (30) in the length direction is provided with a second threaded groove (31), the first connecting piece (40) comprises a first columnar main body (41), the outer surface of the first columnar main body (41) is provided with a first outer thread and a second outer thread at intervals, the first outer thread is connected with the first threaded groove (121), and the second outer thread is connected with the second threaded groove (31), so that the first handle (30) is connected with the spline sleeve (10).
2. The force arm wrench for a nuclear power plant as claimed in claim 1, characterized in that, The middle part of the first columnar main body (41) is provided with a first annular protrusion (42) radially outward, the first annular protrusion (42) divides the first columnar main body (41) into a first columnar portion (411) and a second columnar portion (412), the first outer thread is arranged on the first columnar portion (411), and the second outer thread is arranged on the second columnar portion (412).
3. The force arm wrench for a nuclear power plant as claimed in claim 1, characterized in that, The nuclear power plant force arm wrench further comprises a second handle (50) and a second connecting piece (60), and the second handle (50) is detachably connected with the first handle (30) through the second connecting piece (60).
4. The force arm wrench for a nuclear power plant as set forth in claim 3, wherein, The second end of the first handle (30) in the length direction is provided with a third threaded groove (32). The second handle (50) is in the shape of a long rod, the first end of the second handle (50) in the length direction is provided with a fourth threaded groove (51). The second connecting piece (60) comprises a second columnar main body (61), the outer surface of the second columnar main body (61) is provided with a third outer thread and a fourth outer thread at intervals, the third outer thread is connected with the third threaded groove (32), and the fourth outer thread is connected with the fourth threaded groove (51).
5. The force arm wrench for a nuclear power plant as set forth in claim 4, wherein, The middle part of the second columnar main body (61) is provided with a second annular protrusion (62) radially outward, the second annular protrusion (62) divides the second columnar main body (61) into a third columnar portion (611) and a fourth columnar portion (612), the third outer thread is arranged on the third columnar portion (611), and the fourth outer thread is arranged on the fourth columnar portion (612).
6. The force arm wrench for a nuclear power plant according to any one of claims 3 to 5, characterized in that, The first handle (30) and / or the second handle (50) is in a hollow structure.
7. The force arm wrench for a nuclear power plant according to any one of claims 3 to 5, characterized in that, The first handle (30) and / or the second handle (50) is in a solid structure.
8. The force arm wrench for nuclear power plants according to any one of claims 3 to 5, characterized in that The first handle (30) and the second handle (50) are of the same length.
9. The force arm wrench for nuclear power plants according to any one of claims 3 to 5, characterized in that The first handle (30) is provided with a first protective sleeve (70), and the second handle (50) is provided with a second protective sleeve (80).
10. The force arm wrench for a nuclear power plant as set forth in claim 1, wherein, The fastener (20) includes a cylindrical operation portion (21) and a screw portion (22) connected to an end surface of the operation portion (21).