Special tool for withdrawing wire of backboard terminal of nuclear power unit cabinet

Abstract

The utility model is suitable for the technical field of electrical maintenance, and discloses a special tool for withdrawing a nuclear power unit cabinet backboard terminal, which comprises a handle, an outer cylinder and an inner cylinder, the outer cylinder extends from the handle to the direction away from the handle, the inner cylinder is arranged at the center in the outer cylinder and is cylindrical, a long groove is formed in the end, away from the handle, of the inner cylinder, the long groove is spirally formed in the inner cylinder from the end, away from the handle, of the inner cylinder to the direction of the handle, and the end, away from the handle, of the long groove is open. The inner cylinder is plugged into the terminal column and then is rotated, one side of the opening of the long groove of the inner cylinder can shovel up a wire head on the terminal column and screw the wire head into the long groove, the electric wire on the terminal column can enter the long groove along with rotation, and after the inner cylinder rotates for one circle or more circles, the outer cylinder can limit the electric wire in the outer cylinder to isolate the electric wire from being in contact with other electric wires. And then the tool is pulled out, the electric wire is limited in the long groove due to the friction force of the long groove, and the electric wire is pulled out from the terminal column along with the pulling out of the tool.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical maintenance, in particular to a special tool for withdrawing wires from a backplane terminal of a nuclear power unit cabinet. Background Art

[0002] The DCS system control cabinet backplane of an EPR nuclear power unit has extremely densely packed wire terminals, with various signal wires wrapped around them. When removing wires from the terminals, loose wire cores can easily touch surrounding terminals, causing short circuits. This poses a risk of damaging DCS cabinet components or causing unexpected operation of signal equipment on the short-circuited terminals, impacting the safe and stable operation of the unit. There is a lack of a tool that can quickly remove wires without interfering with other terminals. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a special tool for withdrawing the wires from the back panel terminals of a nuclear power unit cabinet.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a handle, an outer tube and an inner tube; the outer tube extends from the handle in a direction away from the handle, the inner tube is arranged at the center of the outer tube, the inner tube is cylindrical, and a long groove is provided at one end of the inner tube away from the handle. The long groove is spirally arranged on the inner tube in the direction of the handle from the end of the inner tube away from the handle as a starting point, and the long groove is open at the end of the inner tube away from the handle.

[0005] In some embodiments, the outer cylinder is cylindrical, and the inner cylinder is concentric with the outer cylinder.

[0006] In some embodiments, the long groove spirals clockwise starting from the opening toward the handle.

[0007] In some embodiments, the side of the long slot that first contacts the wire is a working side, and the other side of the long slot is a limiting side. The working side forms an angle with the end face of the inner tube away from the handle.

[0008] In some embodiments, the angle is an acute angle.

[0009] In some embodiments, the limiting edge and the end surface of the inner tube away from the handle form an obtuse angle or a rounded angle.

[0010] In some embodiments, the opening width is greater than the slot width.

[0011] In some embodiments, the number of turns of the long groove spiral is at least one.

[0012] In some embodiments, an outer wall of the outer cylinder and an outer wall of the handle are provided with an insulating layer.

[0013] In some embodiments, the handle is hollow inside.

[0014] The implementation of the utility model of the special tool for withdrawing the wires from the back panel terminal of the nuclear power unit cabinet has the following beneficial effects: the inner cylinder is inserted into the terminal post and then rotated, and the side of the long slot opening of the inner cylinder will scoop up the wire ends on the terminal post and screw them into the long slot. The wires on the terminal post will enter the long slot as they rotate. After rotating one or more circles, the outer cylinder will confine the wires inside the outer cylinder, isolating the wires from contact with other wires. Then the tool is pulled out, and the wires will be limited in the long slot due to the friction of the long slot. The wires will be pulled out from the terminal post as the tool is pulled out. The whole process is simple to operate and the wire pulling efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is an overall diagram of a special tool for withdrawing the backplane terminal of a nuclear power unit cabinet in one embodiment of the utility model;

[0017] Figure 2 This is a cross-sectional view of a special tool for withdrawing wires from a backplane terminal of a nuclear power unit cabinet in one embodiment of the present utility model;

[0018] Figure 3 This is a nozzle structure diagram of a special tool for withdrawing the back panel terminal of a nuclear power unit cabinet in one embodiment of the utility model.

[0019] Reference numerals

[0020] 100, outer cylinder; 200, inner cylinder; 210, opening; 211, working edge; 212, limiting edge; 213, angle; 220, long slot; 300, handle. DETAILED DESCRIPTION

[0021] In order to provide a clearer understanding of the technical features, objectives, and effects of the present invention, a specific embodiment of the present invention is 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 "upper," "inner," "outer," etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. These directions are merely for the purpose of facilitating the description of the present invention and do not require that the devices or components referred to have specific directions. Therefore, they should not be construed as limitations on the present invention.

[0022] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "connection", "fixation", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship 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", "third", etc. are only for the convenience of describing 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, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such 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 the specific circumstances.

[0023] Figures 1 to 3 A special tool for withdrawing wires from the back panel terminal of a nuclear power unit cabinet in an embodiment of the utility model is shown. The special tool for withdrawing wires from the back panel terminal of a nuclear power unit cabinet can be used to pull out wires from the terminal column. It may include a handle 300, an outer cylinder 100 and an inner cylinder 200; the outer cylinder 100 extends from the handle 300 in a direction away from the handle 300, and the inner cylinder 200 is arranged at the center of the outer cylinder 100. The inner cylinder 200 is cylindrical, and a long groove 220 is provided at the end of the inner cylinder 200 away from the handle 300. The long groove 220 is spirally arranged on the inner cylinder 200 from the end of the inner cylinder 200 away from the handle 300 in the direction of the handle 300, and the long groove 220 is an opening 210 at the end of the inner cylinder 200 away from the handle 300. Insert the inner cylinder 200 onto the terminal post and then rotate it. The side of the opening 210 of the long slot 220 of the inner cylinder 200 will scoop up the wire ends on the terminal post and screw them into the long slot 220. The wires on the terminal post will enter the long slot 220 as they rotate. After rotating one or more circles, the outer cylinder 100 will confine the wires inside the outer cylinder 100, isolating the wires from contact with other wires. Then pull out the tool, and the wires will be limited in the long slot 220 due to the friction of the long slot 220. The wires will be pulled out from the terminal post as the tool is pulled out. The whole process is simple to operate and the wire pulling efficiency is high.

[0024] In a specific embodiment, the inner barrel 200 and the outer barrel are both fixed on the handle 300. The handle 300 is cylindrical in shape, which is convenient for rotating the handle 300. The cylindrical shape is simple to process and has low cost.

[0025] In a specific embodiment, the handle 300 is provided with a pattern on its surface, and the pattern can be used for anti-slip.

[0026] In a specific embodiment, the handle 300 may be in other shapes, such as a regular hexagon, a regular octagon, etc., and may be provided with edges to provide grip and prevent slipping.

[0027] Figure 1 The outer cylinder 100 may include a cylindrical shape in one embodiment, and the inner cylinder 200 is concentric with the outer cylinder 100. The concentricity of the inner cylinder 200 and the outer cylinder 100 can ensure that the outer cylinder 100 will not collide with other terminal columns when the terminal column is sleeved and rotated.

[0028] Figures 1 to 3 In one embodiment, the long slot 220 may include a clockwise spiral from the opening 210 toward the handle 300. The handle 300 needs to be rotated in the opposite direction of the long slot 220 so that the wire can be scooped from the terminal column.

[0029] It is understood that the wire is wrapped around the terminal post in a clockwise manner and therefore needs to be unwound by reversing the counter-clockwise direction.

[0030] It will be appreciated that if the wire is wrapped counterclockwise around the terminal post, it will require a clockwise motion to unwrap.

[0031] Figure 3 In one embodiment, the inner cylinder 200 may include a long groove 220 whose side first contacts the wire as a working side 211, and a stopper side 212 on the other side of the long groove 220. The working side 211 forms an angle 213 with the end face of the inner cylinder 200 away from the handle 300. This angle 213 is used to scoop up the wires and is the working portion that actually scoops up the wire ends. The angle 213 forms an oblique triangular slope.

[0032] In a specific embodiment, when the long slot is arranged clockwise, the handle needs to be rotated counterclockwise from the direction of the handle toward the outer cylinder so that the working edge can move relative to the wire. When the long slot is arranged counterclockwise, the handle needs to be rotated clockwise from the direction of the handle toward the outer cylinder.

[0033] Figure 3 It is shown that the abutting surface may include the angle 213 as an acute angle in one embodiment. The acute angle can directly cut into the thread end. However, if the angle 213 is a rounded angle or an obtuse angle, the thread end will be pressed under the angle 213, resulting in the inability to shovel out the thread end.

[0034] Figure 3In one embodiment, the abutment surface may include an obtuse angle between the limiting edge 212 and the end face of the inner cylinder 200 away from the handle 300, and the obtuse angle is a rounded angle. The obtuse angle is because the limiting edge 212 will produce friction and abutment with the wire. If it is not processed into a rounded angle, it is easy to scratch the wire.

[0035] Figure 3 In one embodiment, the abutting surface may include an opening 210 with a width greater than the width of the long slot 220 . The opening 210 is funnel-shaped. The large opening 210 can facilitate the introduction of wires into the long slot 220 .

[0036] Figure 3 It is shown that the abutment surface may include the long groove 220 having at least one spiral turn in one embodiment. As long as the wire can be screwed in one turn, the wire can be screwed into the long groove 220 one turn. At this time, the friction force of the abutment between the wire and the long groove 220 is sufficient to limit the wire in the long groove 220.

[0037] In a specific embodiment, the number of turns of the long slot 220 is one or more. More turns can accommodate more wires and generate more relative friction.

[0038] Figure 3 In one embodiment, the abutting surface may include an outer wall of the outer cylinder 100 and an outer wall of the handle 300 provided with an insulating layer. Because the handle 300 needs to directly contact the terminal column, insulation is required to prevent electric shock and interference with other terminal columns.

[0039] In a specific embodiment, the handle 300 and the outer tube 100 are made of insulating materials.

[0040] Figure 3 In one embodiment, the abutting surface may include a hollow interior of the handle 300 . The hollow handle 300 can reduce weight, thereby reducing the weight of the entire tool and lowering labor intensity.

[0041] 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 special tool for withdrawing the backplane terminal of a nuclear power unit cabinet, characterized in that: include: handle (300), outer cylinder (100) and inner cylinder (200); The outer cylinder (100) extends from the handle (300) in a direction away from the handle (300), and the inner cylinder (200) is arranged at the center of the outer cylinder (100). The inner cylinder (200) is cylindrical and provided with a long groove (220). The long groove (220) is spirally arranged on the inner cylinder (200) from one end of the inner cylinder (200) away from the handle (300) in the direction of the handle (300). The long groove (220) is an opening (210) at one end of the inner cylinder (200) away from the handle (300).

2. A special tool for withdrawing the backplane terminal of a nuclear power unit cabinet according to claim 1, characterized in that: The outer cylinder (100) is cylindrical, and the inner cylinder (200) is concentric with the outer cylinder (100).

3. A special tool for withdrawing the backplane terminal of a nuclear power unit cabinet according to claim 1, characterized in that: Starting from the opening (210) and heading towards the handle (300), the long groove (220) spirals clockwise.

4. A special tool for withdrawing the backplane terminal of a nuclear power unit cabinet according to claim 3, characterized in that: The side of the long slot (220) that first contacts the wire is a working side (211), and the other side of the long slot (220) is a limiting side (212). The working side (211) forms an angle (213) with the end face of the inner cylinder (200) away from the handle (300).

5. A special tool for withdrawing the backplane terminal of a nuclear power unit cabinet according to claim 4, characterized in that: The included angle (213) is an acute angle.

6. A special tool for withdrawing the backplane terminal of a nuclear power unit cabinet according to claim 4, characterized in that: The limiting edge (212) and the end surface of the inner cylinder (200) away from the handle (300) form an obtuse angle or a rounded angle.

7. A special tool for withdrawing wires from a backplane terminal of a nuclear power unit cabinet according to claim 6, characterized in that: The width of the opening (210) is greater than the width of the long slot (220).

8. A special tool for withdrawing wires from a backplane terminal of a nuclear power unit cabinet according to claim 1, characterized in that: The number of spiral turns of the long groove (220) is at least one.

9. A special tool for withdrawing wires from a backplane terminal of a nuclear power unit cabinet according to claim 1, characterized in that: The outer wall of the outer cylinder (100) and the outer wall of the handle (300) are provided with an insulating layer.

10. A special tool for withdrawing wires from a backplane terminal of a nuclear power unit cabinet according to claim 1, characterized in that: The handle (300) is hollow inside.

Images