A self-withdrawing indoor unit

Abstract

The utility model provides a kind of self-extraction type centrally installed cabinet, belong to complete electrical equipment product technical field, including cabinet, cabinet is by top plate, bottom plate, rear side plate, left side plate and rear side plate combination and form the front side opening box structure of cabinet;Extraction mechanism unit, extraction mechanism unit is installed in the middle part of cabinet inner chamber;Guide rail assembly, guide rail assembly is two groups, two groups guide rail assembly respectively is installed in the left and right sides of extraction mechanism unit, and extraction mechanism unit is pulled by guide rail assembly;Circuit breaker chassis car, circuit breaker chassis car is fixedly installed in the top of extraction mechanism unit;Vacuum circuit breaker body, vacuum circuit breaker body is fixedly installed in the top of circuit breaker chassis car, can be without the aid of external function transfer car, the extraction and advance of circuit breaker handcart are realized quickly, the installation, debugging, replacement, use, repair, maintenance etc. of circuit breaker are facilitated, work efficiency is greatly improved, and maintenance space is saved.

Description

Technical Field

[0001] This utility model relates to the technical field of complete sets of electrical equipment products, specifically to a self-extractable central switch cabinet. Background Technology

[0002] In current power systems, 10kV medium-voltage armored metal switchgear is widely used. It employs a handcart-type vacuum circuit breaker, installed in the center of the cabinet, and features a reasonable structure, high safety and reliability, and strong versatility. Vacuum circuit breakers are large and heavy, commonly weighing around 200 kg. Therefore, external functional carts or hydraulic carts are required for the extraction, insertion, and handling of vacuum circuit breakers. These carts are typically essential auxiliary tools for medium-voltage switchgear. During circuit breaker installation, commissioning, use, inspection, and maintenance, extraction and insertion are frequently necessary, leading to frequent use of auxiliary functional carts, which also presents several problems. Hydraulic functional carts, in particular, are bulky, cumbersome to operate, and space-consuming, making them very inconvenient in substations with limited space. Typically, only 2 to 3 external functional carts are configured per distribution room; more than that is uneconomical and takes up valuable space. A limited number naturally leads to inefficiencies, such as insufficient carts for multiple devices, resulting in queuing, reduced work efficiency, and idle time. Furthermore, the height of the external functional cart is affected by factors such as the height of the circuit breaker compartment and the indoor floor conditions. During use, the height and angle of the functional cart tray need to be constantly adjusted to ensure that it is aligned with the circuit breaker chassis and completely locked to the cabinet so that the circuit breaker trolley can be smoothly pulled out or pushed into the cabinet.

[0003] Currently, the widely used central switchgear circuit breaker access sections use fixed guide rails, which only guide the chassis and do not move. The circuit breaker is moved in and out by the chassis wheels rolling or sliding within the guide grooves. In actual use, due to assembly deviations, deformation, and differences in chassis products, the chassis often gets stuck and rubs against the guide rail grooves, causing difficulties in the movement of the trolley. This problem is also difficult to repair. Therefore, we propose a self-extractable central switchgear. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, the present invention overcomes the problems of the previous medium-voltage switchgear, which required the use of an external functional vehicle to pull out and push the circuit breaker, which not only occupied space, but also had the problems of cumbersome operation and inconvenience of use.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A self-extractable central cabinet, including

[0009] The cabinet is a box-like structure with an opening on the front, composed of a top panel, a bottom panel, a rear panel, a left side panel, and a rear side panel.

[0010] The withdrawal mechanism unit is installed in the middle of the cabinet's internal cavity;

[0011] The guide rail assembly consists of two sets, which are respectively installed on the left and right sides of the extraction mechanism unit, and the extraction mechanism unit is pulled out through the guide rail assembly.

[0012] The circuit breaker chassis is fixedly installed on top of the extraction mechanism unit;

[0013] The vacuum circuit breaker body is fixedly installed on the top of the circuit breaker chassis vehicle;

[0014] The circuit breaker trolley can be quickly pulled out and pushed forward without the aid of an external transfer vehicle by the cooperation of the extraction mechanism unit and the guide rail assembly.

[0015] Further defining the above technical solution, the extraction mechanism unit includes two sets of symmetrically arranged guide rail mounting plates. The two sets of guide rail mounting plates are symmetrically fixedly installed on the left and right side walls of the inner cavity of the cabinet. The two sets of guide rail assemblies are respectively installed on the side of the guide rail mounting plates that are close to each other. A tray bracket is fixedly installed on the side of the two sets of guide rail assemblies that are close to each other. A tray is fixedly installed between two adjacent sets of tray brackets. The circuit breaker chassis is fixedly installed on the top of the tray.

[0016] Further defining the above technical solution, the guide rail assembly is a three-section assembly, comprising a first guide rail section, a second guide rail section, and a third guide rail section, which are slidably connected. The first guide rail section is fixedly connected to the guide rail mounting plate, and the third guide rail section is fixedly connected to the tray bracket.

[0017] Further defining the above technical solution, the pallet support has a double-folded edge design, and the folded edges of the pallet support are right angles. The sides of the pallet support are fixedly connected to the third section of the left and right guide rails, and the top of the pallet support is fixedly connected to the pallet.

[0018] Further defining the above technical solution, chassis operating handles are symmetrically fixedly installed on the left and right sides of the front side wall of the circuit breaker chassis, and chassis locking tongue plates are movably installed on the left and right sides of the circuit breaker chassis.

[0019] Further defining the above technical solution, the pallet has upward folded edges on both the left and right sides, and the front of the folded edges and the left and right side walls of the inner cavity of the cabinet are provided with slots, which correspond to the position of the chassis locking tongue plate of the circuit breaker chassis vehicle.

[0020] Further defining the above technical solution, the front side wall of the circuit breaker chassis is provided with four sets of movable slots, and the left chassis operating handle is installed in the two sets of movable slots on the left side, and the right chassis operating handle is installed in the two sets of movable slots on the right side. The rear side of the left chassis operating handle is connected to the left chassis locking tongue plate through a connecting rod, and the rear side of the right chassis operating handle is connected to the right chassis locking tongue plate through a connecting rod.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, this utility model provides a self-extractable central cabinet, which has the following advantages:

[0023] (1) The circuit breaker trolley can be quickly pulled out and pushed forward without the aid of an external functional transfer vehicle, which facilitates the installation, commissioning, replacement, use, repair and maintenance of the circuit breaker, greatly improves work efficiency and saves maintenance space.

[0024] (2) The tray and the circuit breaker move synchronously, and move in and out by extending and retracting the guide rail. The movement is flexible and smooth, and there will be no problems such as jamming or friction. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention in the withdrawn state;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention in the pushed-in state;

[0028] Figure 3 This is a schematic diagram of the installation structure of the extraction mechanism unit and guide rail assembly of this utility model. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the installation structure of the extraction mechanism unit and guide rail assembly of this utility model. Figure 2 ;

[0030] Figure 5 for Figure 1 Enlarged schematic diagram of the structure of section A in the middle.

[0031] Among them, 10 is the cabinet; 20 is the vacuum circuit breaker body; 30 is the circuit breaker chassis; 301 is the chassis operating handle; 302 is the chassis locking tongue; 40 is the withdrawal mechanism unit; 401 is the guide rail mounting plate; 402 is the tray bracket; 403 is the tray; 50 is the guide rail assembly; 501 is the first section of the guide rail; 502 is the second section of the guide rail; and 503 is the third section of the guide rail. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0033] Example 1: This example provides a self-extractable central cabinet, such as... Figure 1 and 2 As shown, it can solve the problem that in the past, the circuit breaker had to be pulled out and pushed in by an external functional vehicle, which not only occupied space, but also had problems such as cumbersome operation and inconvenience of use. It includes cabinet 10, which is a box structure with a front opening composed of a top plate, bottom plate, rear side plate, left side plate and rear side plate.

[0034] The withdrawal mechanism unit 40 is installed in the middle of the cabinet's internal cavity;

[0035] The guide rail assembly 50 consists of two sets, which are respectively installed on the left and right sides of the extraction mechanism unit 40, and the extraction mechanism unit 40 is pulled out through the guide rail assembly 50.

[0036] Circuit breaker chassis 30 is fixedly installed on the top of the withdrawal mechanism unit 40;

[0037] Vacuum circuit breaker body 20, which is fixedly installed on the top of circuit breaker chassis 30;

[0038] The circuit breaker trolley can be quickly pulled out and pushed forward without the aid of an external transfer vehicle by the cooperation of the extraction mechanism unit 40 and the guide rail assembly 50.

[0039] Based on the above features, the working principle of this utility model is as follows: The cabinet of the central switchgear with the self-extraction mechanism of this invention is basically consistent with the current central switchgear cabinet in terms of size, structure and layout. The important change is the circuit breaker entry and exit part, which eliminates the previous fixed guide rail and adopts a design of pull-out tray + sliding guide rail (i.e., pull-out mechanism unit 40 and guide rail assembly 50). It uses retractable heavy-duty guide rail, which is designed to bear a load of more than 220 kg, which fully meets the load-bearing capacity of most circuit breakers.

[0040] The vacuum circuit breaker body 20 is mounted on the extraction mechanism unit 40 via the circuit breaker chassis trolley 30. The extraction mechanism unit 40 and the guide rail assembly 50 form a push-pull structure, which facilitates the removal of the vacuum circuit breaker body 20 from the cabinet 10. Therefore, the circuit breaker trolley can be quickly extracted and pushed forward without the aid of an external functional transport vehicle, which facilitates the installation, commissioning, replacement, use, repair, and maintenance of the circuit breaker, greatly improving work efficiency and saving maintenance space.

[0041] Example 2: As Figure 3-5 As shown, this embodiment is based on the above implementation, and the technical problem solved by this embodiment compared with the above embodiment 1 is: how to disassemble and assemble the circuit breaker chassis 30. The difference from the above embodiment is that: the extraction mechanism unit 40 includes two sets of symmetrically arranged guide rail mounting plates 401. The two sets of guide rail mounting plates 401 are symmetrically fixedly installed on the left and right side walls of the inner cavity of the cabinet 1. The two sets of guide rail assemblies 50 are respectively installed on the side of the guide rail mounting plates 401 that are close to each other. The side of the two sets of guide rail assemblies 50 that are close to each other is fixedly installed with a tray bracket 402. A tray 403 is fixedly installed between two adjacent sets of tray brackets 402. The circuit breaker chassis 30 is fixedly installed on the top of the tray 403.

[0042] The guide rail assembly 50 is a three-section assembly, including a first guide rail section 501, a second guide rail section 502, and a third guide rail section 503. The first guide rail section 501, the second guide rail section 502, and the third guide rail section 503 are slidably connected to each other. The first guide rail section 501 is fixedly connected to the guide rail mounting plate 401, and the third guide rail section 503 is fixedly connected to the tray bracket 402. The maximum extension distance of the guide rail assembly 50 is sufficient to allow the circuit breaker trolley to be completely pulled out of the cabinet 1.

[0043] The pallet support 402 features a double-folded edge design, which improves its load-bearing strength and deformation resistance. The folded edges of the pallet support 402 are right-angled. The sides of the pallet support 402 are fixedly connected to the third section 503 of the left and right guide rails, and the top of the pallet support 402 is fixedly connected to the pallet 403. The function of the pallet support 402 is to support the pallet 403 and the circuit breaker, and to move synchronously with the extension and retraction of the guide rail assembly 50.

[0044] The left and right sides of the front side wall of the circuit breaker chassis 3 are symmetrically fixed with chassis operation handles 301, and the left and right sides of the circuit breaker chassis 3 are movably installed with chassis locking tongue plates 302.

[0045] The left and right sides of the tray 403 have upward folded edges. The folded edges limit the left and right movement of the circuit breaker and prevent it from moving. The front of the folded edges and the left and right side walls of the inner cavity of the cabinet 1 are provided with slots. The slots correspond to the position of the chassis locking tongue 302 of the circuit breaker chassis 3.

[0046] The front side wall of the circuit breaker chassis 3 has four sets of movable slots. The left chassis operating handle 301 is installed in the two sets of movable slots on the left side, and the right chassis operating handle 301 is installed in the two sets of movable slots on the right side. The rear side of the left chassis operating handle 301 is connected to the left chassis locking tongue plate 302 through a connecting rod, and the rear side of the right chassis operating handle 301 is connected to the right chassis locking tongue plate 302 through a connecting rod.

[0047] Based on the above features, the working principle of this utility model is as follows: The guide rail mounting plate 401 is fixed in the middle of the cabinet 1. There is one guide rail mounting plate 401 on each side of the middle of the cabinet. Its design strength meets the load-bearing requirements of the vacuum circuit breaker body 20. After the vacuum circuit breaker body 20 is placed on the tray 403, the chassis lock tongue 302 extends into the slot of the left and right folded edge to limit and lock the circuit breaker chassis 3, preventing the vacuum circuit breaker body 20 from moving back and forth on the tray 402. When the vacuum circuit breaker body 20 is pushed into the cabinet 1, the chassis handle 301 is turned to temporarily retract the chassis lock tongue 302. After aligning the slot of the tray 402 with the corresponding slot on the cabinet 1, the chassis handle 301 is pushed to insert the chassis lock tongue 302 into the slot of the cabinet 1, locking the tray 402 and the vacuum circuit breaker body 20.

[0048] The guide rail assembly 50 has a three-section structure, with ball bearings sliding between each section to ensure reliable movement under heavy loads. The first section 501 is a fixed section, which is fixedly installed with the guide rail mounting plate 401. The second section 502 is a free section. The third section 503 is fixedly connected to the tray bracket 402. The tray 403 moves synchronously with the third section 503. The pull-out limit of the third section 503 is the maximum extension distance of the guide rail, and its length is sufficient to allow the circuit breaker trolley to be completely pulled out of the cabinet 1.

[0049] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments, which is intended to enable those skilled in the art to understand and apply the present invention. However, it should not be assumed that the specific implementation of the present invention is limited to these descriptions.

Claims

1. A self-extractable central cabinet, characterized in that, include The cabinet is a box-like structure with an opening on the front, composed of a top panel, a bottom panel, a rear panel, a left side panel, and a rear side panel. The withdrawal mechanism unit is installed in the middle of the cabinet's internal cavity; The guide rail assembly consists of two sets, which are respectively installed on the left and right sides of the extraction mechanism unit, and the extraction mechanism unit is pulled out through the guide rail assembly. The circuit breaker chassis is fixedly installed on top of the extraction mechanism unit; The vacuum circuit breaker body is fixedly installed on the top of the circuit breaker chassis vehicle; The circuit breaker trolley can be quickly pulled out and pushed forward without the aid of an external transfer vehicle by the cooperation of the extraction mechanism unit and the guide rail assembly.

2. The self-extractable central cabinet according to claim 1, characterized in that, The extraction mechanism unit includes two sets of symmetrically arranged guide rail mounting plates. The two sets of guide rail mounting plates are symmetrically fixedly installed on the left and right side walls of the inner cavity of the cabinet. The two sets of guide rail assemblies are respectively installed on the side of the guide rail mounting plates that are close to each other. A tray bracket is fixedly installed on the side of the two sets of guide rail assemblies that are close to each other. A tray is fixedly installed between two adjacent sets of tray brackets. The circuit breaker chassis is fixedly installed on the top of the tray.

3. The self-extractable central cabinet according to claim 2, characterized in that, The guide rail assembly is a three-section assembly, comprising a first guide rail section, a second guide rail section, and a third guide rail section. The first guide rail section, the second guide rail section, and the third guide rail section are slidably connected to each other. The first guide rail section is fixedly connected to the guide rail mounting plate, and the third guide rail section is fixedly connected to the tray bracket.

4. The self-extractable central cabinet according to claim 3, characterized in that, The pallet support features a double-folded edge design with right-angled folds. The sides of the pallet support are fixedly connected to the third section of the left and right guide rails, and the top of the pallet support is fixedly connected to the pallet.

5. The self-extractable central cabinet according to claim 4, characterized in that, The circuit breaker chassis has symmetrically fixed operating handles on the left and right sides of the front side wall, and chassis locking tongues are movably installed on the left and right sides of the circuit breaker chassis.

6. The self-extractable central cabinet according to claim 5, characterized in that, The pallet has upward folded edges on both the left and right sides. The front of the folded edges and the left and right side walls of the inner cavity of the cabinet are provided with slots, which correspond to the position of the chassis locking tongue plate of the circuit breaker chassis vehicle.

7. The self-extractable central cabinet according to claim 5, characterized in that, The front side wall of the circuit breaker chassis has four sets of movable slots. The left chassis operating handle is installed in the two sets of movable slots on the left, and the right chassis operating handle is installed in the two sets of movable slots on the right. The rear side of the left chassis operating handle is connected to the left chassis locking tongue plate through a connecting rod, and the rear side of the right chassis operating handle is connected to the right chassis locking tongue plate through a connecting rod.

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