A control cabinet terminal module fuse loading and unloading device

Abstract

This utility model provides a fuse loading and unloading device for a control cabinet terminal module, relating to the field of online fuse loading and unloading tools. It includes a handheld part, two clamping plates, a sliding assembly, and curved rods. A first guide rail is provided at the end of the handheld part. The two clamping plates slide relative to each other to clamp the fuse. The sliding assembly is disposed in the handheld part and connected to a force-applying part. Pulling the force-applying part causes the sliding assembly to slide in a straight line. The moving direction of the sliding assembly is perpendicular to the moving direction of the clamping plates. The number of curved rods corresponds to the number of slidable clamping plates. The two ends of the curved rods are connected to the sliding assembly and clamping plates respectively through a connecting structure, which includes a straight slide groove and a slider slidably disposed within the groove. The middle of the curved rod is hinged. This utility model is advantageous for use in the confined space of a control cabinet, improving fuse loading and unloading efficiency and reducing the possibility of pin bending. It is more suitable for online loading and unloading of faulty fuses in control cabinets.

Description

Technical Field

[0001] This utility model relates to the technical field of online fuse loading and unloading tools, and in particular to a fuse loading and unloading device for control cabinet terminal modules. Background Technology

[0002] The Distributed Control System (DCS) cabinet is one of the most critical pieces of equipment in a nuclear power plant, playing a core role in industrial automation control. A DCS system is a microprocessor-based instrumentation and control system that employs a design principle of distributed control functions and centralized display and operation. Through a hierarchical structure, this system centralizes the monitoring and operation of equipment scattered throughout the nuclear power plant, achieving efficient, stable, and safe control of the plant's operation.

[0003] The installation and removal of fuses in existing nuclear power plant DCS control cabinet terminal modules lacks dedicated tools. The control cabinet space is relatively confined, and direct hand insertion and removal are impossible. Typically, needle-nose pliers, tweezers, or other tools are used. However, these tools present several problems. For example, both the gripping end and handle of needle-nose pliers need to be opened at a certain angle, requiring considerable space, especially the handle. Given the limited space within the control cabinet, finding the appropriate angle and position for operation remains inconvenient. While tweezers don't require a large opening angle, in the confined space, the distance between the operator's hand and the gripping end makes it difficult to apply sufficient clamping force to ensure stable fuse holding. Furthermore, the difficulty of using traditional tools for fuse installation and removal increases the risk of improper force application. Since fuses have relatively low rigidity, uneven force can easily lead to lead bending. (See attached image) Figure 6 As shown, the fuse is surrounded by other electronic components and has a large number of nuclear power cabinet control signal cable connections, as well as terminal module power supply cables. Using tools with low compatibility in the approximately 3 mm surrounding space greatly increases the possibility of accidentally touching other signal connections, which is completely inconsistent with the principles of efficiency, stability and safety of nuclear power plants.

[0004] Therefore, there is an urgent need to design a fuse loading and unloading device to avoid the above situation, reduce the difficulty of loading and unloading fuses, and improve online working efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a fuse loading and unloading device for control cabinet terminal modules, which solves the problems existing in the prior art, is beneficial for use in the confined space of the control cabinet, improves the efficiency of fuse loading and unloading, and reduces the possibility of pin bending.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A fuse loading and unloading device for a control cabinet terminal module includes a handheld part, two clamping plates, a sliding assembly, and a crank rod. The end of the handheld part is provided with a first guide rail. At least one of the two clamping plates is slidably disposed on the first guide rail. The two clamping plates slidably clamp a fuse. The sliding assembly is disposed in the handheld part and is connected to a force-applying part. Pulling the force-applying part causes the sliding assembly to slide in a straight line. The moving direction of the sliding assembly is perpendicular to the moving direction of the clamping plates. The number of crank rods corresponds to the number of slidable clamping plates. Both ends of the crank rod are connected to the sliding assembly and the clamping plates respectively via a connecting structure. The connecting structure includes a straight groove and a slider slidably disposed within the groove. The middle of the crank rod is hinged.

[0008] In one embodiment, both clamps are slidably mounted on the first guide rail, and two cranks are symmetrically arranged relative to the center face of the handheld part.

[0009] In one embodiment, the crank is an L-shaped structure with a hinged inflection point. A first strip-shaped hole is provided along the length of the short rod of the L-shaped structure. A first fixing post is fixed to the bottom of the clamping plate, and the first fixing post is slidably disposed within the first strip-shaped hole. A second strip-shaped hole is provided along the length of the long rod of the L-shaped structure. A second fixing post is fixed to the end of the sliding assembly, and the second fixing post is slidably disposed within the second strip-shaped hole.

[0010] In one embodiment, the sliding assembly includes a sliding block, a sliding bar, and a connecting rod connecting the two; the sliding direction of the sliding block and the sliding bar is perpendicular to the sliding direction of the clamping plate; the sliding block is connected to the force-applying part, and the second fixing post is fixed on the sliding bar.

[0011] In one embodiment, the handheld part is provided with a second guide rail, and the sliding block is slidably disposed on the second guide rail.

[0012] As one embodiment, the force-applying part includes a pull rod that is fixedly connected to the sliding block.

[0013] As one embodiment, it also includes a compression spring passing through the pull rod, one end of the compression spring abutting against the sliding block and the other end abutting against the hand grip, for providing a restoring force to the sliding block.

[0014] In one embodiment, the handheld part includes a housing and an end cap. The housing has an open structure, and the end cap is detachably connected to the open position of the housing. The sliding block, the sliding strip, and the connecting rod are all disposed inside the housing. One end of the housing is fixed with the first guide rail, and the other end of the housing is provided with a through hole for the pull rod to pass through. The inner wall of the housing is fixed with the second guide rail.

[0015] As one embodiment, the end of the housing is also provided with a limiting hole communicating with the through hole, and the side wall of the pull rod is provided with a limiting block that can pass through the limiting hole. The pull rod and the connecting block are rotatably configured and axially limited.

[0016] As one embodiment, the end of the pull rod is provided with a pull ring, and the surfaces of the two clamps facing each other are provided with an anti-slip layer.

[0017] This utility model has the following technical advantages over the prior art:

[0018] This invention, by incorporating a sliding assembly, a crank rod, and clamping plates, allows the sliding assembly to move the two clamping plates relative to each other to clamp the fuse or to slide them away from each other to release the fuse. The linear sliding of the two clamping plates not only eliminates the need for a large gap between them, making it advantageous in confined spaces like control cabinets, but also ensures that the clamping force is applied radially along the fuse, reducing the possibility of pin bending. Furthermore, the linear movement of the sliding assembly transmits force to the clamping plates via the crank rod, allowing operators to apply pulling or pushing forces without needing to apply pressure close to the clamping plates. This allows operators to hold the fuse away from the clamping plates, unaffected by the limited space within the control cabinet, facilitating loading and unloading operations, improving efficiency, and reducing the risk of accidental contact with other electrical components due to operator inconvenience. It is particularly suitable for online loading and unloading of faulty fuses in control cabinets. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the control cabinet terminal module fuse loading and unloading device in one embodiment of the present invention;

[0021] Figure 2 for Figure 1A schematic diagram of a partial cross-section;

[0022] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0023] Figure 4 This is a schematic diagram of the internal structure of the control cabinet terminal module fuse loading and unloading device in one embodiment of the present invention;

[0024] Figure 5 for Figure 4 A magnified view of a portion of region B in the middle;

[0025] Figure 6 This is a schematic diagram showing the distribution of module fuses in a control cabinet to which the control cabinet terminal module fuse loading and unloading device can be applied in one embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Housing; 2. End cap; 3. First guide rail; 4. Clamping plate; 5. Anti-slip layer; 6. Pull rod; 7. Pull ring; 8. Fastening bolt; 9. Screw hole; 10. Crank rod; 11. Sliding block; 12. Sliding strip; 13. Connecting rod; 14. Second guide rail; 15. Compression spring; 16. Limiting hole; 17. Limiting block; 18. First strip hole; 19. Second strip hole; 20. First fixing post; 21. Second fixing post; 22. Rotating shaft; 23. Fuse. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The purpose of this invention is to provide a fuse loading and unloading device for control cabinet terminal modules, which solves the problems existing in the prior art, is beneficial for use in the confined space of the control cabinet, improves the efficiency of fuse loading and unloading, and reduces the possibility of pin bending.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-6As shown, this embodiment provides a device for loading and unloading a fuse 23 in a control cabinet terminal module, including a handheld part, two clamping plates 4, a sliding assembly, and a crank rod 10. A first guide rail 3 is provided at the end of the handheld part. At least one of the two clamping plates 4 is slidably mounted on the first guide rail 3. The clamping plates can be fixed and the other slidably mounted, or both clamping plates 4 can be slidably mounted. In this embodiment, both clamping plates 4 are slidably mounted. The two clamping plates 4 slidably clamp the fuse 23. The shape of the opposing surfaces on the clamping plates 4 is adapted to the shape of the fuse 23, being an arc shape, which increases the contact area between the clamping plates 4 and the fuse 23, thereby improving the clamping effect. The sliding assembly is located in the handheld part and is connected to a force-applying part. Pulling the force-applying part causes the sliding assembly to slide in a straight line. The moving direction of the sliding assembly is perpendicular to the moving direction of the clamping plates 4, and the sliding direction of the sliding assembly is parallel to or coincides with the axial direction of the fuse 23 to be loaded or unloaded. The number of cranks 10 corresponds to the number of slidable clamping plates 4. When only one clamping plate 4 is slidable, only one crank 10 is provided. Since this embodiment uses two clamping plates 4 that can both slide, two cranks 10 are symmetrically provided and connected to the clamping plates 4 respectively. The two ends of the crank 10 are connected to the sliding assembly and the clamping plate 4 respectively through a connecting structure. The connecting structure includes a straight groove and a slider slidably disposed in the groove. The middle part of the crank 10 is hinged through a rotating shaft 22. The straight groove in the connecting structure is disposed at the end of the crank 10 or on the sliding assembly or the clamping plate 4. Correspondingly, the slider is disposed on the sliding assembly or the clamping plate 4 or at the end of the crank 10. After the two ends of the crank 10 are connected to the sliding assembly and the clamping plate 4 respectively through the connecting structure, when the crank 10 rotates around the rotating shaft 22, it can drive the two clamping plates 4 to move relative to or away from each other.

[0032] In use, the operator holds the handle with one hand, positioning the two clamping plates 4 on either side of the fuse 23 to be removed. With the other hand, the operator pulls the sliding assembly through the force application part. As the sliding assembly slides, it rotates the end of the crank 10, causing the entire crank 10 to rotate. The two clamping plates 4 slide relative to each other under the influence of the rotating crank 10, clamping the fuse 23. The operator can then remove the fuse 23 by simultaneously pulling the handle and the force application part. To install the fuse 23, first clamp it with the two clamping plates 4, then install it in the designated position. Pushing the sliding assembly in the opposite direction causes the crank 10 to rotate in the opposite direction, moving the two clamping plates 4 in opposite directions, thus releasing the fuse 23.

[0033] Therefore, this embodiment, by setting up a sliding assembly, a crank 10, and clamping plates 4, allows the sliding assembly to drive the two clamping plates 4 to either slide relative to each other to clamp the fuse 23 or slide away from each other to release the fuse 23. The two clamping plates 4 slide relative to each other in a straight line to clamp the fuse 23, which not only eliminates the need for a large gap between the two clamping plates 4, making it advantageous for use in the confined space of the control cabinet, but also allows the clamping force to be applied radially along the fuse 23, reducing the possibility of pin bending. Furthermore, after the sliding assembly moves linearly, the force is transmitted to the clamping plates 4 via the crank 10. The operator only needs to apply pulling or pushing force, without needing to apply squeezing force close to the clamping plates 4. Therefore, the operator's hand position can be far from the clamping plates 4, unaffected by the confined space within the control cabinet, facilitating loading and unloading operations, improving operator efficiency, and reducing the possibility of accidental contact with other electrical components due to operator inconvenience. This makes it more suitable for online loading and unloading of faulty fuses 23 in control cabinets.

[0034] like Figure 2 , Figure 3 As shown, in this embodiment, the curved rod 10 has an L-shaped structure with a hinge at the inflection point. A first strip-shaped hole 18 is provided along the length of the shorter rod of the L-shaped structure. A first fixing post 20 is fixed to the bottom of the clamping plate 4, and the first fixing post 20 is slidably disposed within the first strip-shaped hole 18. A second strip-shaped hole 19 is provided along the length of the longer rod of the L-shaped structure. A second fixing post 21 is fixed to the end of the sliding assembly, and the second fixing post 21 is slidably disposed within the second strip-shaped hole 19. The connection between the first strip-shaped hole 18 and the first fixing post 20, and the connection between the second strip-shaped hole 19 and the second fixing post 21, are both as described above. Both the first strip-shaped hole 18 and the second strip-shaped hole 19 are straight holes, with arc-shaped ends. The width of the first strip-shaped hole 18 is slightly larger than the diameter of the first fixing post 20, and the width of the second strip-shaped hole 19 is slightly larger than the diameter of the second fixing post 21, ensuring smooth sliding of the first fixing post 20 and the second fixing post 21. Both the free ends of the first fixing post 20 and the free ends of the second fixing post 21 are provided with end enlargements, such as end caps. The diameter of the end caps is greater than the width of the first strip hole 18 and the width of the second strip hole 19, which can prevent the first fixing post 20 and the second fixing post 21 from coming out of the first strip hole 18 and the second strip hole 19.

[0035] like Figure 4 As shown, in this embodiment, the sliding assembly includes a sliding block 11, a sliding bar 12, and a connecting rod 13 connecting the two; the sliding direction of the sliding block 11 and the sliding bar 12 is perpendicular to the sliding direction of the clamping plate 4; the sliding block 11 is connected to the force application part, and a second fixing post 21 is fixed on the sliding bar 12.

[0036] To ensure the sliding stability of the sliding block 11, a second guide rail 14 is provided on the handheld part in this embodiment, and the sliding block 11 is slidably disposed on the second guide rail 14.

[0037] In this embodiment, the force-applying part includes a pull rod 6 that is fixedly connected to the sliding block 11.

[0038] like Figure 5 As shown, this embodiment also includes a compression spring 15 that passes through the pull rod 6. One end of the compression spring 15 abuts against the sliding block 11, and the other end abuts against the hand-held part, which is used to provide a restoring force to the sliding block 11. When the operator releases the pull rod 6, the compression spring 15 can push the sliding block 11 to reset, so that the two clamped plates 4 slide in opposite directions and release the fuse 23.

[0039] In this embodiment, the handheld part includes a housing 1 and an end cap 2. The housing 1 has an open structure, and the end cap 2 is detachably connected to the open position of the housing 1. Specifically, the housing 1 is provided with screw holes 9, and the end cap 2 is detachably connected to the housing 1 by fastening bolts 8. In this embodiment, the screw holes 9 are distributed at the four corners of the housing 1. The sliding block 11, the sliding strip 12, and the connecting rod 13 are all disposed inside the housing 1. A first guide rail 3 is fixed to one end of the housing 1, and a through hole for the pull rod 6 to pass through is provided at the other end of the housing 1. A second guide rail 14 is fixed to the inner wall of the housing 1. The end of the housing 1 where the first guide rail 3 is mounted is also provided with a strip-shaped opening, which is used for the short rod of the crank 10 to extend out and connect to the clamping plate 4.

[0040] In this embodiment, the end of the housing 1 is also provided with a limiting hole 16 communicating with the through hole. A limiting block 17 is provided on the side wall of the pull rod 6, which can pass through the limiting hole 16. The pull rod 6 and the sliding block 11 are rotatably configured and axially limited. When the two clamping plates 4 clamp the fuse 23, the limiting block 17 just passes through the limiting hole 16 to the outside of the housing 1. By rotating the pull rod 6, the limiting block 17 can be made to abut against the outer wall of the end of the housing 1, thereby fixing the position of the pull rod 6 and ensuring the clamping state of the fuse 23, making it easier for the operator to install and remove the fuse 23. In order to accommodate fuses 23 of different diameters, multiple limiting blocks 17 are provided at intervals along the axial direction of the pull rod 6 in this embodiment. The setting of each limiting block 17 corresponds to the clamping position of a type of fuse 23, so as to improve the adaptability of the installation and removal device in this embodiment.

[0041] To facilitate the operation of the lever 6 by staff, a pull ring 7 is provided at the end of the lever 6 in this embodiment.

[0042] To ensure the stability of clamping the fuse 23 between the clamping plates 4, in this embodiment, anti-slip layers 5 are provided on the opposing surfaces of the two clamping plates 4. The surface of the anti-slip layer 5 can also be provided with protrusions to further improve the friction between the anti-slip layer 5 and the surface of the fuse 23.

[0043] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fuse loading and unloading device for a control cabinet terminal module, characterized in that, include: The hand-held part has a first guide rail at its end. Two clamping plates, at least one of which is slidably disposed on the first guide rail; the two clamping plates slidably clamp the fuse against each other; A sliding assembly is disposed in the handheld part and connected to a force-applying part. By pulling the force-applying part, the sliding assembly can be driven to slide in a straight line. The moving direction of the sliding assembly is perpendicular to the moving direction of the clamp. The cranks are provided with a number corresponding to the number of slidable clamps. The two ends of the cranks are connected to the sliding assembly and the clamps respectively through a connecting structure. The connecting structure includes a linear groove and a slider slidably disposed in the groove. The middle part of the cranks is hinged.

2. The control cabinet terminal module fuse loading and unloading device according to claim 1, characterized in that, Both clamps are slidably mounted on the first guide rail, and two cranks are symmetrically arranged relative to the center face of the handheld part.

3. The control cabinet terminal module fuse loading and unloading device according to claim 1, characterized in that, The crank has an L-shaped structure with a hinged inflection point. A first strip-shaped hole is provided along the length of the short rod of the L-shaped structure. A first fixing post is fixed to the bottom of the clamping plate and is slidably disposed within the first strip-shaped hole. A second strip-shaped hole is provided along the length of the long rod of the L-shaped structure. A second fixing post is fixed to the end of the sliding assembly and is slidably disposed within the second strip-shaped hole.

4. The control cabinet terminal module fuse loading and unloading device according to claim 3, characterized in that, The sliding assembly includes a sliding block, a sliding bar, and a connecting rod connecting the two; the sliding direction of the sliding block and the sliding bar is perpendicular to the sliding direction of the clamping plate; the sliding block is connected to the force-applying part, and the second fixing post is fixed on the sliding bar.

5. The control cabinet terminal module fuse loading and unloading device according to claim 4, characterized in that, The handheld part is provided with a second guide rail, and the sliding block is slidably disposed on the second guide rail.

6. The control cabinet terminal module fuse loading and unloading device according to claim 4, characterized in that, The force-applying part includes a pull rod that is fixedly connected to the sliding block.

7. The control cabinet terminal module fuse loading and unloading device according to claim 6, characterized in that, It also includes a compression spring that passes through the pull rod, one end of which abuts against the sliding block and the other end against the handle, for providing a restoring force to the sliding block.

8. The control cabinet terminal module fuse loading and unloading device according to claim 7, characterized in that, The handheld part includes a housing and an end cap. The housing has an open structure, and the end cap is detachably connected to the open position of the housing. The sliding block, the sliding strip, and the connecting rod are all disposed inside the housing. One end of the housing is fixed with the first guide rail, and the other end of the housing is provided with a through hole for the pull rod to pass through. The second guide rail is fixed on the inner wall of the housing.

9. The control cabinet terminal module fuse loading and unloading device according to claim 8, characterized in that, The end of the housing is also provided with a limiting hole communicating with the through hole, and the side wall of the pull rod is provided with a limiting block that can pass through the limiting hole. The pull rod and the connecting block are rotatably configured and axially limited.

10. The control cabinet terminal module fuse loading and unloading device according to claim 6, characterized in that, The end of the pull rod is provided with a pull ring, and the surfaces of the two clamps facing each other are provided with an anti-slip layer.

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