Internal maintenance auxiliary tool and maintenance method for 10-kilovolt KYN switch cabinet

Abstract

The invention relates to the technical field of auxiliary tools for internal maintenance of switch cabinets, in particular to an auxiliary tool for internal maintenance of a 10-kilovolt KYN switch cabinet and a maintenance method. Comprising at least one group of supporting units, and each supporting unit comprises a supporting plate and an attaching plate fixedly connected with the supporting plate; the width adjusting mechanism comprises a fixed outer shaft and a movable core shaft in sliding fit with the fixed outer shaft, one end of the movable core shaft is connected with the supporting plate, and a roller is arranged at the other end of the movable core shaft; the upper push plate and the lower push plate are arranged on the supporting plate and are used for contacting and unlocking a valve locking mechanism in the switch cabinet; and the locking mechanism is used for locking the relative positions of the movable core shaft and the fixed outer shaft. According to the invention, the risk of clamping injury caused by accidental falling of the valve in the traditional operation is fundamentally eliminated, and the safety of the maintenance operation is obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of auxiliary tools for internal maintenance of switch cabinets, and in particular to an auxiliary tool for internal maintenance of a 10-kilovolt KYN switch cabinet and a maintenance method. BACKGROUND

[0002] As a key power distribution equipment in the power system, a 10-kilovolt KYN series switch cabinet is usually provided with a shutter mechanism inside, which is used to isolate the live parts during maintenance to prevent electric shock accidents caused by accidental contact. In order to improve the safety protection level, the shutter mechanism is currently widely equipped with a mechanical locking device, which ensures that the shutter cannot be opened in the live state of the equipment through an interlocking structure, thereby effectively protecting the personal safety of the operators.

[0003] However, while the mechanical locking design improves safety, it also brings new difficulties to maintenance operations in the power-off state. When the busbar is powered off and the operations such as cabinet cleaning, static contact box inspection, or test wiring need to be performed, the maintenance personnel cannot directly push the shutter open and must operate the unlocking mechanism and push against the shutter at the same time to enter the cabinet for operation. Due to the narrow space inside the cabinet, the shutter has an elastic reset function, and the distance between the upper shutter and the unlocking plate is far, so usually two people need to operate together: one person is responsible for unlocking and supporting the shutter, and the other person performs maintenance operations. This method not only has low efficiency, but also has the risk of injury due to the need for continuous human support of the shutter, and also increases the number of people inside the cabinet and the coordination difficulty, which is not conducive to the standardization and standardization management of on-site operations.

[0004] Currently, there is no special maintenance auxiliary tool in the industry that can adapt to different cabinet widths, be compatible with various shutter structures, and achieve single-person safe and fast operation. SUMMARY

[0005] The present application provides an auxiliary tool for internal maintenance of a 10-kilovolt KYN switch cabinet and a maintenance method. Details are described below: An auxiliary tool for internal maintenance of a 10-kilovolt KYN switch cabinet, comprising: at least one set of support units, the support units comprising a support plate and an attachment plate fixedly connected thereto; at least one set of width adjustment mechanisms, the width adjustment mechanisms comprising a fixed outer shaft and a movable core shaft in sliding cooperation with the fixed outer shaft, one end of the movable core shaft being connected to the support plate and the other end being provided with a roller; an upper push plate and a lower push plate mounted on the support plate, the upper push plate and the lower push plate being used to contact and unlock the shutter locking mechanism inside the switch cabinet; and a locking mechanism, the locking mechanism comprising a shaft support, the shaft support being sleeved on the fixed outer shaft for connecting two adjacent fixed outer shafts.

[0006] Preferably, the mobile mandrel is provided with a long hole extending along its axial direction, and the other end of the mobile mandrel is in sliding fit with the fixed outer shaft and is locked by a lock nut after being connected with the shaft support, the locking mechanism further comprises a locking member penetrating through the fixed outer shaft and selectively clamped into one end or the other end of the long hole, and a handle for driving the locking member.

[0007] Preferably, the attachment plate is provided with a cabinet locking assembly, which comprises a retractable tongue plate, a spring for driving the tongue plate to move in the extending direction, and a handle connected with the tongue plate for controlling the extension and retraction of the tongue plate.

[0008] Preferably, the support plate is detachably connected with the upper and lower push plates; the support plate and / or the upper and lower push plates are provided with at least two different connection hole positions A and B for accommodating switch cabinet doors of different sizes.

[0009] Preferably, the upper and lower push plates are quickly locked and connected with the support plate by a ratchet, and / or are fixedly connected by a wire pre-installed on the support plate.

[0010] Preferably, the width adjusting mechanism, the support unit and the push plates are arranged in two groups and symmetrically along the axial direction of the fixed outer shaft, forming a frame structure capable of being transversely supported between the two side plates of the switch cabinet.

[0011] A method for internal maintenance of a switch cabinet using the auxiliary tool, comprising the following steps: S1: adjusting the width adjusting mechanism according to the cabinet width of the switch cabinet to be maintained, so that the overall width of the tool is adapted to the cabinet width, and then locking by the locking mechanism; S2: pushing the tool into the switch cabinet so that the rollers roll along the bottom of the cabinet until the upper and lower push plates contact the door locking mechanism; S3: continuing to push the tool to unlock and open the upper and lower doors of the switch cabinet by the upper and lower push plates; S4: operating the cabinet locking assembly on the tool to fix the tool with the cabinet of the switch cabinet, so that the doors are maintained in the open state; S5: performing cleaning, testing and maintenance operations in the cabinet.

[0012] Preferably, in step S1, if the switch cabinet is 800mm wide, the mobile mandrel is adjusted so that the first end of the long hole is matched with the locking member; if the switch cabinet is 1000mm wide, the mobile mandrel is adjusted so that the second end of the long hole is matched with the locking member.

[0013] Preferably, before step S1, step S0 is further included: according to the model of the switch cabinet door, A hole position or B hole position for installing the upper push plate and the lower push plate to the support plate is selected.

[0014] The 10-kilovolt KYN switch cabinet internal maintenance auxiliary tool provided by the application can be used by a single person to safely and conveniently unlock and reliably fix the door locking mechanism of various specifications of switch cabinets, fundamentally eliminates the risk of injury caused by accidental door falling in traditional operation, and significantly improves the safety of maintenance operation. The tool has the functions of quickly adjusting the width and the mounting hole position, realizes the universality among different cabinet widths such as 800 mm and 1000 mm and door models, avoids the complexity and cost of special tools for different cabinet types, greatly improves the efficiency and standardization level of maintenance work, reduces the number of cooperative workers in the cabinet, and optimizes the working conditions in the limited space. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the auxiliary tool of the application; Figure 2 is a left view of the auxiliary tool of the application; Figure 3 is a top view of the auxiliary tool of the application; Figure 4 is a three-dimensional schematic view of the application of the auxiliary tool to a 800 mm wide switch cabinet; Figure 5 is a structural schematic view of the moving mandrel in the application; Figure 6 is a three-dimensional schematic view of the application of the auxiliary tool to a 1000 mm wide switch cabinet.

[0016] Explanation of reference numerals in the drawing: 1-upper push plate, 2-lower push plate, 3-A hole position, 4-B hole position, 5-ratchet lock handle, 6-support plate, 7-moving mandrel, 8-fixed outer shaft, 9-pressing handle, 10-shaft support, 11-lock nut, 12-attachment plate, 13-roller, 14-handle, 15-spring, 16-tongue plate, 17-long hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0018] The utility model provides a 10 kilovolt KYN switch cabinet internal maintenance auxiliary tool, its core lies in the rigid support frame of adjustable width and depth is built, the frame can be stably supported in the switch cabinet, and the safe unlocking and reliable fixation of the valve locking mechanism are realized by using the specially designed push plate component.

[0019] As Figures 1 to 4 shown, the tool mainly includes two groups of symmetrical support units, width adjusting mechanism connected between them, push plate component installed on the support unit and locking mechanism for fixation.

[0020] The support unit mainly includes support plate 6 and attachment plate 12 welded with it. The support plate 6 is used as the main force bearing and installation matrix, and the front end (close to the valve side in the cabinet) is used for installing the push plate component.

[0021] The width adjusting mechanism is the key of the tool to adapt to different cabinet widths. It includes a fixed outer shaft 8 and two movable core shafts 7 inserted from both ends of the fixed outer shaft 8 and slidable. The other end of the movable core shaft 7 is in sliding fit with the fixed outer shaft 8 and connected with the shaft support 10 and locked by the lock nut 11. The outer end of the movable core shaft 7 is installed with a roller 13, which facilitates the tool to be pushed in the cabinet. A long hole 17 extending in the axial direction is processed on the shaft of the movable core shaft 7. A compression handle 9 is installed on the fixed outer shaft 8, which drives a locking pin (not separately marked in the figure). When the tool needs to adapt to different width cabinets, pull the support units on both sides outward, and the movable core shaft 7 is pulled out of the fixed outer shaft 8. After the roller 13 is in contact with the side wall of the cabinet, the compression handle 9 is pressed down, and the locking pin is clamped into the corresponding end of the long hole 17 of the movable core shaft 7 (for example, one end corresponds to 800mm cabinet width, and the other end corresponds to 1000mm cabinet width), so that the support width of the tool can be quickly locked.

[0022] The push plate component includes an upper push plate 1 and a lower push plate 2. They are installed on the specific hole position of the front end of the support plate 6 by bolts or quick locking parts (such as ratchet locking handle 5). At least two groups of installation hole positions are preset on the support plate 6, namely A hole position 3 and B hole position 4, which correspond to different depth (or size) valve mechanisms. For example, for 800mm wide outlet cabinet and 1000mm wide PT cabinet with smaller valve mechanism, the push plate is installed in A hole position 3; for 1000mm wide receiving cabinet with larger valve mechanism, the push plate is installed in B hole position 4. This design ensures that the push plate can accurately act on the unlocking position of different types of valves.

[0023] To further ensure the stability of the tool in the cabinet, a set of cabinet locking components is arranged on the auxiliary plate 12. The components include a tongue plate 16 that can be extended and retracted in the guide groove of the auxiliary plate 12, a spring 15 that provides outward elastic force for the tongue plate 16, and a handle 14 for manually controlling the retraction of the tongue plate 16. When the tool is pushed into the cabinet to the appropriate position, the handle 14 is released, and the tongue plate 16 is ejected under the action of the spring 15 and tightly presses against the upright column or panel on the inside of the switch cabinet, preventing the tool from moving forward and backward during operation.

[0024] The use method of the tool is as follows: Firstly, according to the width of the switch cabinet to be repaired (such as 800mm or 1000mm), the width of the tool is adjusted: the two side support units are pulled outward to the position of the roller 13 to match the width of the cabinet, and then the compression handle 9 is pressed to lock.

[0025] Secondly, according to the model of the cabinet type valve, the upper push plate 1 and the lower push plate 2 are installed on the A hole position 3 or the B hole position 4 of the support plate 6, and the ratchet lock knob 5 is locked.

[0026] Then, hold the fixed outer shaft 8 or the support position in the middle of the tool, and push the tool horizontally into the switch cabinet that has been de-energized. The roller 13 makes the pushing process labor-saving and smooth.

[0027] When the push plate contacts and presses the mechanical locking baffle of the valve, continue to apply force, and the upper and lower valves can be opened to the maximum opening position at the same time by using the push plate.

[0028] Finally, operate the handle 14 on the two auxiliary plates 12 to release the tongue plate 16, so that it tightly presses against the internal structure of the cabinet, thereby firmly fixing the entire tool together with the opened valve. At this time, the maintenance personnel can release the tool and safely perform operations such as cleaning and testing wiring of the static contact box in the cabinet without worrying about the accidental falling of the valve.

[0029] After the operation is completed, pull back the handle 14 to retract the tongue plate 16, and then pull the tool out of the cabinet. Through the above-mentioned way, the single-person safe, efficient and standardized internal maintenance work of various models of 10kV KYN switch cabinets is realized.

[0030] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A 10 kilovolt (KYN) switchgear internal maintenance auxiliary tool, characterized in that, The utility model relates to a kind of switch cabinet maintenance tools, including: At least one set of support unit, the support unit includes support plate (6) and with its fixed connection appendix plate (12); At least one set of width adjusting mechanism, the width adjusting mechanism includes fixed outer shaft (8) and with its sliding fit mobile mandrel (7), one end of the mobile mandrel (7) is connected with the support plate (6), the other end is equipped with gyro wheel (13); Upper push plate (1) and lower push plate (2) installed on the support plate (6), the upper push plate (1) and lower push plate (2) are used to contact and unlock the shutter locking mechanism in switch cabinet; And locking mechanism, the locking mechanism includes shaft support (10), the shaft support (10) is set on the fixed outer shaft (8), for connecting two adjacent fixed outer shaft (8).

2. The 10 kilovolt KYN switchgear internal maintenance auxiliary tool according to claim 1, characterized in that: Long hole (17) is opened in the mobile mandrel (7) and extends along its axial direction, the other end of mobile mandrel (7) is slidably connected with fixed outer shaft (8) and is connected with shaft support (10) after being locked by lock nut (11), the locking mechanism further includes locking member passing through the fixed outer shaft (8) and selectively clamped into one end or other end of the long hole (17), and handle (9) for driving the locking member.

3. The 10 kilovolt KYN switchgear internal maintenance auxiliary tool according to claim 1 or 2, characterized in that: The appendix plate (12) is provided with a cabinet locking assembly, the cabinet locking assembly includes a retractable tongue plate (16), a spring (15) for driving the tongue plate (16) to move in the extension direction, and a handle (14) connected to the tongue plate (16) for controlling the extension and retraction thereof.

4. The 10 kilovolt KYN switchgear internal maintenance auxiliary tool of claim 1, wherein: The support plate (6) is detachably connected with the upper push plate (1), lower push plate (2);At least two different connection hole positions are provided on the support plate (6) and / or the upper push plate (1), lower push plate (2) for adapting to switch cabinets of different sizes.

5. The 10 kilovolt KYN switchgear internal maintenance auxiliary tool of claim 4, wherein: The upper push plate (1) and lower push plate (2) are quickly locked and connected with the support plate (6) by ratchet locking handle (5), and / or are fixedly connected by a wire preinstalled on the support plate (6).

6. The 10 kilovolt KYN switchgear internal maintenance auxiliary tool of claim 1, wherein: The width adjusting mechanism, support unit and push plate are provided as two sets and symmetrically arranged along the axial direction of the fixed outer shaft (8), forming a frame structure that can be transversely supported between the two side plates of the switch cabinet.

7. A method of performing an internal inspection of a switchgear cabinet using the aid according to any one of claims 1-6, characterized in that, The utility model includes the following steps: S1: according to the cabinet width of the switch cabinet to be repaired, adjust the width adjusting mechanism, so that the overall width of the tool is adapted to the cabinet width, and locked by locking mechanism; S2: push the tool into the switch cabinet, so that the gyro wheel (13) rolls along the cabinet bottom until the upper push plate (1) and lower push plate (2) contact the shutter locking mechanism; S3: continue to advance the tool, unlock and open the upper and lower shutters of the switch cabinet by the upper push plate (1) and lower push plate (2); S4: operate the cabinet locking assembly on the tool to fix the tool with the cabinet, so that the shutter is maintained in the open state; S5: clean up, test wiring and repair operation in the cabinet.

8. The method of claim 7, wherein, In step S1, if the switch cabinet is 800mm wide cabinet type, the mobile mandrel (7) is adjusted to make the first end of the long hole (17) cooperate with the locking member; if the switch cabinet is 1000mm wide cabinet type, the mobile mandrel (7) is adjusted to make the second end of the long hole (17) cooperate with the locking member.

9. The method of claim 7, wherein, Before step S1, step S0 is further included: according to the model of the switch cabinet valve, A hole position (3) or B hole position (4) on which the upper push plate (1) and the lower push plate (2) are installed to the support plate (6) is selected.

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