A handcart type switchgear structure
Patent Information
- Application Number
- CN202611162608.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-03
- Publication Date
- 2026-09-25
AI Technical Summary
1、操作速度较慢，丝杆驱动手车行程的方式使得手车的移动速度受到限制，特别是在需要快速断开电路的情况下，无法及时将手车从工作位置移出，从而影响设备的安全性和可靠性
[0013]实施本发明的手车式开关柜结构，具有如下的有益效果：手车式开关柜结构包括：柜体和手车；柜体的前部开设有用以与手车相装配安装的适配腔，适配腔设有插口，在适配腔的内壁上设有多个静触头，多个静触头排列为上下层结构，适配腔的底部两侧设有滑轨，适配腔的顶部两侧设有导轨；手车包括：基座和装设在基座上的侧支架，基座上装设有动触头，基座的端部设有多个滚轮，侧支架上设有顶支架，顶支架的一端部的一侧面设有第一减速轮，顶支架的一端部的底面设有第二减速轮，第一减速轮旋转方向为竖直方向，第二减速轮的旋转方向为水平方向，其中：手车由插口插入至适配腔中，多个滚轮适配卡入滑轨内滚动，第一减速轮和第二减速轮分别适配插至导轨内，动触头适配一一对应插入静触头中；拉动手车，使动触头与静触头快速分离，通过导轨对第一减速轮和第二减速轮的作用，对手车进行减速，能够提高手车式开关柜在紧急情况下的操作效率，并提升安全性；结构精简，利于维修及维护。
Smart Images
Figure CN122823263A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of switchgear technology, and more particularly to a handcart-type switchgear structure. Background Technology
[0002] Handcart-type switchgear is a widely used electrical device in medium-voltage power distribution systems. It uses the movement of a handcart to insert and remove electrical components. Traditional handcart-type switchgear typically uses a lead screw to drive the handcart's travel. While this drive method enables smooth movement of the handcart, it has the following drawbacks: 1. The operation speed is relatively slow. The way the handcart is driven by the lead screw limits the movement speed of the handcart. Especially when it is necessary to quickly disconnect the circuit, it is impossible to move the handcart out of the working position in time, thus affecting the safety and reliability of the equipment.
[0003] 2. Inability to achieve rapid disconnection: In certain emergency situations, it is necessary to quickly disconnect the handcart from its working position to cut off the circuit and prevent the fault from escalating. However, the traditional lead screw drive method cannot meet the requirement of rapid disconnection. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a handcart-type switchgear structure that can improve the operating efficiency of the handcart-type switchgear in emergency situations and enhance safety; the structure is simple and easy to repair and maintain.
[0005] To solve the above-mentioned technical problems, the present invention provides a structure for a handcart-type switchgear, comprising: a cabinet and a handcart; the front of the cabinet has an adapter cavity for assembly and installation with the handcart, one end of the adapter cavity has a socket, and multiple stationary contacts are provided on the inner wall of the adapter cavity, the multiple stationary contacts being arranged in an upper and lower layer structure, slide rails are provided on both sides of the bottom of the adapter cavity, and guide rails are provided on both sides of the top of the adapter cavity; the handcart includes: a base and a side bracket mounted on the base, a moving contact is mounted on the base, multiple rollers are provided at the end of the base, and a top bracket is provided on the side bracket. A first reduction wheel is provided on one side of one end of the frame, and a second reduction wheel is provided on the bottom surface of one end of the top support. The first reduction wheel rotates in a vertical direction, and the second reduction wheel rotates in a horizontal direction. The handcart is inserted into the adapter cavity through the insertion port, and multiple roller adapters are inserted into the slide rail and roll. The first and second reduction wheels are respectively adapted to be inserted into the guide rail, and multiple moving contact adapters are inserted into multiple stationary contacts one by one. Pulling the handcart causes the moving contact to quickly separate from the stationary contact. The handcart is decelerated by the action of the first and second reduction wheels on the guide rail.
[0006] The guide rail has two contact surfaces, a horizontal one and a vertical one. The first reduction wheel rolls in contact with the horizontal contact surface of the guide rail, and the second reduction wheel rolls in contact with the vertical contact surface of the guide rail.
[0007] The guide rail has a free section and a deceleration section on the horizontal and vertical contact surfaces, respectively. The thickness of the free section is smaller than that of the deceleration section. The free section is installed near the stationary contact.
[0008] The thickness of the deceleration section gradually increases from one end connected to the free section to the other end of the deceleration section to increase the rolling friction on the two deceleration wheels; a buffer fillet is provided between the free section and the deceleration section.
[0009] The double-layer stationary contacts are separated by a partition, and a semi-enclosed protective sleeve is installed on the outer periphery of the end of the stationary contact facing the rear of the cabinet.
[0010] The stationary contact is connected to a connecting copper busbar at the end facing the rear of the cabinet; a carrier plate is provided on the back of the cabinet, and a support terminal is installed on the carrier plate to fix the connecting copper busbar connected to the stationary contact in the upper half of the cabinet.
[0011] Among them, the connecting copper busbars that connect to the stationary contacts in the upper half layer are arranged in a vertical state, an inclined state of 45°, and a horizontal state, respectively.
[0012] The cabinet has a lower contact box at the bottom and a connecting terminal at the back. The connecting copper busbar that connects to the stationary contact in the lower half is connected to the lower contact box through the connecting terminal.
[0013] The handcart-type switchgear structure of the present invention has the following beneficial effects: The handcart-type switchgear structure includes: a cabinet and a handcart; the front of the cabinet has an adapter cavity for assembly and installation with the handcart, the adapter cavity has a socket, and multiple stationary contacts are provided on the inner wall of the adapter cavity, the multiple stationary contacts are arranged in an upper and lower layer structure, the bottom two sides of the adapter cavity are provided with slide rails, and the top two sides of the adapter cavity are provided with guide rails; the handcart includes: a base and a side bracket mounted on the base, a moving contact is mounted on the base, multiple rollers are provided at the end of the base, a top bracket is provided on the side bracket, and a first reduction wheel is provided on one side of one end of the top bracket. A second reduction wheel is provided on the bottom surface of one end of the frame. The first reduction wheel rotates vertically, and the second reduction wheel rotates horizontally. The handcart is inserted into the adapter cavity through the socket, and multiple roller adapters are inserted into the slide rail and roll. The first and second reduction wheels are respectively adapted to be inserted into the guide rail, and the moving contact adapters are inserted into the stationary contacts one by one. Pulling the handcart causes the moving contact to quickly separate from the stationary contact. The handcart is decelerated by the action of the first and second reduction wheels on the guide rail. This can improve the operating efficiency of the handcart switchgear in emergency situations and enhance safety. The structure is simple and easy to repair and maintain. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is an overall structural diagram of the cabinet of the handcart-type switchgear according to an embodiment of the present invention.
[0016] Figure 2 This is an overall structural diagram of the handcart of the handcart-type switchgear according to an embodiment of the present invention.
[0017] Figure 3 This is a side view of the guide rail structure of the handcart-type switchgear according to an embodiment of the present invention.
[0018] Figure 4 This is a schematic diagram of the internal structure of the cabinet of the handcart-type switchgear according to an embodiment of the present invention.
[0019] Figure 5 This is a schematic diagram of the back structure of the cabinet of the handcart-type switchgear according to an embodiment of the present invention. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] like Figures 1-5 The image shows an embodiment of the handcart-type switchgear structure of the present invention.
[0022] The structure for a handcart-type switchgear in this embodiment of the invention includes: a cabinet 10 and a handcart 20; the front of the cabinet 10 is provided with an adapter cavity 11 for assembly and installation with the handcart 20, one end of the adapter cavity 11 is provided with a socket 111, a plurality of stationary contacts 12 are provided on the inner wall of the adapter cavity 11, the plurality of stationary contacts 12 are arranged in an upper and lower layer structure, slide rails 13 are provided on both sides of the bottom of the adapter cavity 11, and guide rails 14 are provided on both sides of the top of the adapter cavity 11. The handcart 20 includes: a base 201 and a side bracket 202 mounted on the base 201. A movable contact 21 is mounted on the base 201. Multiple rollers 22 are provided at the ends of the base 201. A top bracket 23 is provided on the side bracket 202. A first reduction wheel 231 is provided on one side of one end of the top bracket 23, and a second reduction wheel 232 is provided on the bottom surface of one end of the top bracket 23. The first reduction wheel 231 rotates vertically, and the second reduction wheel 232 rotates horizontally. The handcart 20 is inserted into the adapter cavity 11 through the socket 111. Multiple rollers 22 are fitted into the slide rail 13 and roll. The first reduction wheel 231 and the second reduction wheel 232 are respectively fitted into the guide rail 14. Multiple moving contacts 21 are fitted into multiple stationary contacts 12 one by one. Pulling the handcart 20 causes the moving contact 21 to quickly separate from the stationary contact 12. The handcart 20 is then decelerated by the action of the first reduction wheel 231 and the second reduction wheel 232 through the guide rail 14.
[0023] In practice, the guide rail 14 has two contact surfaces, a horizontal one and a vertical one. The first reduction wheel 231 rolls in contact with the horizontal contact surface of the guide rail 14, and the second reduction wheel 232 rolls in contact with the vertical contact surface of the guide rail 14.
[0024] In this embodiment, the guide rail 14 has a free section 141 and a deceleration section 142 on its horizontal and vertical contact surfaces, respectively. The thickness of the free section 141 is smaller than that of the deceleration section 142. The free section 141 is installed near the stationary contact 12. This can be understood as follows: on the horizontal contact surface of the guide rail 14, the distance between the free section 141 and the slide rail 13 is greater than the distance between the deceleration section 142 and the slide rail 13.
[0025] When a rapid disconnection is required, the moving contact 21 inserts into the stationary contact 12. The trolley 20 is then quickly pulled, causing the moving contact 21 to separate rapidly from the stationary contact 12. At this point, the trolley 20 has relatively high kinetic energy, and the first deceleration wheel 231 transitions from the free section 141 to the deceleration section 142. Since the distance between the roller 22 and the first deceleration wheel 231 remains unchanged, the thickness of the deceleration section 142 increases, causing the first deceleration wheel 231 to roll towards the top of the deceleration section 142. This adds a certain amount of rolling friction to the first deceleration wheel 231, which consumes most of the kinetic energy of the trolley 20, thus achieving deceleration of the trolley 20. This rapid disconnection also avoids the risk of the trolley 20 falling, greatly improving the electrical safety of the power distribution system.
[0026] The purpose of setting the thickness of the deceleration section 142 to gradually increase from one end connected to the free section 141 to the other end of the deceleration section 142 is to increase the rolling friction force on the two deceleration wheels 231 and 232 respectively. Preferably, a buffer fillet is provided between the free section 141 and the deceleration section 142.
[0027] It is understandable that as the second reduction wheel 232 slides from the free section 141 to the reduction section 142, the thickness of the reduction section 142 gradually increases during the transition from the free section 141 to the reduction section 142 on the vertical contact surface of the guide rail 14, which gradually increases the rolling friction and further reduces the deceleration time.
[0028] Furthermore, the double-layered stationary contacts are separated by a partition 15, and a semi-enclosed sleeve 16 is installed on the outer periphery of the end of the stationary contact 12 facing the rear of the cabinet 10. The purpose of this arrangement is that the partition 15 can separate the upper and lower parts to avoid interference. The semi-enclosed sleeve 16 can prevent adjacent stationary contacts 12 on the same layer from interfering with each other.
[0029] Furthermore, the ends of the stationary contacts 12 in both the upper and lower structures facing the rear of the cabinet 10 are connected to connecting copper busbars 17. The assembly methods of the connecting copper busbars 17 of the stationary contacts 12 in the upper and lower structures differ in the following ways.
[0030] In this embodiment, a carrier plate 31 is assembled on the back of the cabinet 10. The carrier plate 31 is provided with a support terminal 32, and the connecting copper busbar 17 connected to the static contact 12 of the upper half layer is fixed through the support terminal 32.
[0031] Preferably, the connecting copper busbars 17 connected to the upper stationary contact 12 are arranged in three states: vertical, inclined at 45°, and horizontal. In practice, the different inclination angles of the connecting copper busbars 17 allow the handcart-type switchgear structure in this embodiment to be applied in handcart-type switchgear structures with limited upper space. In this embodiment, the upper connecting copper busbars 17 are arranged in three states: vertical, inclined at 45°, and horizontal, effectively separating the connection ends of the stationary contact 12 on the same layer. The horizontal state, for easier connection, adopts an n-shape, i.e., bent at ninety degrees at both ends.
[0032] Preferably, the copper busbars 17 arranged at a 45° angle and in a horizontal position are fixed to the support terminals 32, with the two support terminals 32 staggered vertically. The copper busbars 17 in the vertical position are fixed by support terminals fixed inside the cabinet 10.
[0033] Furthermore, a lower contact box 33 is installed at the bottom of the cabinet 10, and a connecting terminal 34 is installed on the back of the cabinet 10. The connecting copper busbar 17, which is connected to the stationary contact 12 of the lower half layer, is connected to the lower contact box 33 through the connecting terminal 34. In practice, the connecting terminal 34 can quickly disconnect the connection between the stationary contact 12 of the lower half layer and the lower contact box 33.
[0034] Furthermore, in this embodiment, the back of the cabinet 10 is provided with multiple maintenance plates, which are arranged at intervals between the carrier plates 31. Specifically, in this embodiment, two carrier plates 31 are used to support the supporting terminals 32, and one carrier plate 31 is used to support the connecting terminals 34. A detachable maintenance plate is provided below each carrier plate 31, namely an upper maintenance plate 41, a middle maintenance plate 42, and a lower maintenance plate 43. The upper maintenance plate 41, the middle maintenance plate 42, and the lower maintenance plate 43 correspond to the upper half-layer stationary contact 12, the lower half-layer stationary contact 12, and the lower contact box 33, respectively. This design facilitates precise maintenance of each layer of contacts by maintenance personnel.
[0035] In practice, when maintenance is required on the upper stationary contact 12, simply open the upper maintenance plate 41. The partition 15 then isolates the other contacts, effectively preventing unnecessary contact. When maintenance is required on the lower stationary contact 12, simply open the middle maintenance plate 42. This disconnects the connection between the connecting terminal and the lower contact box, and the partition 15 again isolates the upper stationary contact 12, effectively preventing unnecessary contact. When maintenance is required on the lower contact box, simply open the lower maintenance plate 43. This disconnects the connection between the connecting terminal and the lower stationary contact 12, preventing unnecessary contact.
[0036] The handcart-type switchgear structure of the present invention has the following beneficial effects: The handcart-type switchgear structure includes: a cabinet and a handcart; the front of the cabinet has an adapter cavity for assembly and installation with the handcart, the adapter cavity has a socket, and multiple stationary contacts are provided on the inner wall of the adapter cavity, the multiple stationary contacts are arranged in an upper and lower layer structure, the bottom two sides of the adapter cavity are provided with slide rails, and the top two sides of the adapter cavity are provided with guide rails; the handcart includes: a base and a side bracket mounted on the base, a moving contact is mounted on the base, multiple rollers are provided at the end of the base, a top bracket is provided on the side bracket, and a first reduction wheel is provided on one side of one end of the top bracket. A second reduction wheel is provided on the bottom surface of one end of the frame. The first reduction wheel rotates vertically, and the second reduction wheel rotates horizontally. The handcart is inserted into the adapter cavity through the socket, and multiple roller adapters are inserted into the slide rail and roll. The first and second reduction wheels are respectively adapted to be inserted into the guide rail, and the moving contact adapters are inserted into the stationary contacts one by one. Pulling the handcart causes the moving contact to quickly separate from the stationary contact. The handcart is decelerated by the action of the first and second reduction wheels on the guide rail. This can improve the operating efficiency of the handcart switchgear in emergency situations and enhance safety. The structure is simple and easy to repair and maintain.
Claims
1. A handcart-type switchgear structure, characterized in that, include: Cabinet and handcart; the front of the cabinet has an adapter cavity for assembly and installation with the handcart, one end of the adapter cavity has an insertion port, and multiple stationary contacts are provided on the inner wall of the adapter cavity. The multiple stationary contacts are arranged in an upper and lower layer structure. Slide rails are provided on both sides of the bottom of the adapter cavity, and guide rails are provided on both sides of the top of the adapter cavity. The handcart includes: a base and a side bracket mounted on the base. A movable contact is mounted on the base. Multiple rollers are provided at the ends of the base. A top bracket is provided on the side bracket. A first reduction wheel is provided on one side of one end of the top bracket, and a second reduction wheel is provided on the bottom surface of one end of the top bracket. The first reduction wheel rotates vertically, and the second reduction wheel rotates horizontally. The handcart is inserted into the adapter cavity through the socket, the multiple roller adapters are inserted into the slide rail and roll, the first reduction wheel and the second reduction wheel are respectively inserted into the guide rail, and the multiple moving contact adapters are inserted into the multiple stationary contacts one by one; Pulling the handcart causes the moving contact to quickly separate from the stationary contact, and the handcart is decelerated by the action of the guide rail on the first and second reduction wheels.
2. The handcart-type switchgear structure as described in claim 1, characterized in that, The guide rail has two contact surfaces, a horizontal one and a vertical one. The first reduction wheel rolls in contact with the horizontal contact surface of the guide rail, and the second reduction wheel rolls in contact with the vertical contact surface of the guide rail.
3. The handcart-type switchgear structure as described in claim 2, characterized in that, The guide rail has a free section and a deceleration section on the horizontal and vertical contact surfaces, respectively. The thickness of the free section is smaller than that of the deceleration section. The free section is installed near the stationary contact.
4. The handcart-type switchgear structure as described in claim 3, characterized in that, The thickness of the deceleration section gradually increases from one end connected to the free section to the other end of the deceleration section, so as to increase the rolling friction force on the two deceleration wheels. A buffer fillet is provided between the free section and the deceleration section.
5. The handcart-type switchgear structure as described in claim 1, characterized in that, The double-layered stationary contacts are separated by a partition, and a semi-enclosed protective sleeve is installed on the outer periphery of the end of the stationary contact facing the rear of the cabinet.
6. The handcart-type switchgear structure as described in claim 1, characterized in that, The end of the stationary contact facing the rear of the cabinet is connected to a connecting copper busbar. The back of the cabinet is provided with a carrier plate, and a support terminal is installed on the carrier plate. The connecting copper busbar that is connected to the stationary contact of the upper half layer is fixed through the support terminal.
7. The handcart-type switchgear structure as described in claim 6, characterized in that, The connecting copper busbars that connect to the stationary contacts in the upper half are arranged in a vertical state, an inclined state at 45°, and a horizontal state, respectively.
8. The handcart-type switchgear structure as described in claim 1, characterized in that, The bottom of the cabinet is equipped with a lower contact box, and the back of the cabinet is equipped with a connecting terminal. The connecting copper busbar that connects to the stationary contact of the lower half layer is connected to the lower contact box through the connecting terminal.