Switch
By installing a seal on the top cover of the switch, the problem of contamination of the arc-extinguishing chamber in harsh environments is solved, achieving sealing and venting functions in harsh environments and ensuring the safety and reliability of the switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2026-03-24
AI Technical Summary
In harsh environments, the arc-extinguishing chamber of a switch is susceptible to contamination from sand, fibers, and conductive dust, which can affect its arc-extinguishing ability. Furthermore, contaminants can enter the interior of the switch, leading to temperature rise or safety accidents. Therefore, it is necessary to prevent external sand and dust from entering the interior of the switch.
A seal is installed on the top cover of the switch to seal the vent hole on the top cover. The seal deforms to release air when the internal air pressure reaches a threshold, preventing external contaminants from entering, and restores the seal when the air pressure returns to normal.
It effectively prevents wind, sand, and dust from entering the switch, ensuring the sealing and ventilation functions of the arc-extinguishing chamber, and avoiding temperature rise and safety accidents.
Smart Images
Figure CN224036249U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of low-voltage electrical apparatus, and particularly relates to a switch. BACKGROUND
[0002] The switch is a very important electrical apparatus in a power supply and distribution circuit, can cut off a current to be carried to realize the disconnection of the circuit, and plays a role in protecting the circuit and electrical equipment. An arc extinguishing chamber is usually arranged on the circuit breaker to ensure that the circuit breaker can safely and effectively extinguish an electric arc when disconnecting the circuit, thereby protecting the equipment.
[0003] When the switch is applied in a harsh environment, for example, a gobi desert area with serious wind and sand, a smelting plant, a chemical fiber enterprise, a mine plant and the like, the arc extinguishing chamber is easily polluted by sand, dust and conductive dust, thereby affecting the arc extinguishing capacity. Meanwhile, the pollutants can enter the inside of the switch from the top cover, and then pollute the internal components of the switch, for example, the arc extinguishing chamber, which may cause temperature rise or even a safety accident. Therefore, there is an urgent need for a protective structure which can prevent wind and sand, dust and the like outside the switch from entering the inside of the top cover of the switch. SUMMARY
[0004] The utility model discloses a switch which is fixed with a sealing element on the top cover, the sealing element seals the air hole on the top cover, the sealing element can prevent wind and sand, dust and the like from entering the inside of the top cover, and when the air pressure in the top cover increases to a threshold value, the sealing element can be deformed to discharge air.
[0005] The utility model discloses a switch which is fixed with a sealing element on the top cover, the sealing element seals the air hole on the top cover, the sealing element can prevent wind and sand, dust and the like from entering the inside of the top cover, and when the air pressure in the top cover increases to a threshold value, the sealing element can be deformed to discharge air.
[0006] In one specific embodiment of the utility model, the top cover comprises a top plate, a side plate and a rear plate, the side plate is a pair of plates extending downward from both sides of the top plate, and the rear plate extends downward from the rear side of the top plate; the air hole comprises a first air hole, the first air hole is located on the side plate, and the first air hole communicates the inside of the top cover with the outside.
[0007] In another specific embodiment of the utility model, the top cover includes a top plate, side plates and a rear plate, the side plates are a pair of plates extending downward from both sides of the top plate, and the rear plate extends downward from the rear side of the top plate; the air vent includes a second air vent, the second air vent is located on the rear plate, and the second air vent communicates the inside of the top cover with the outside.
[0008] In another specific embodiment of the utility model, the sealing member includes a first sealing member, the first air vent cooperates with the first sealing member, and the first sealing member is installed on the side plate to seal the first air vent.
[0009] In another specific embodiment of the utility model, the sealing member includes a second sealing member, the second air vent cooperates with the second sealing member, and the second sealing member is installed on the rear plate to seal the second air vent.
[0010] In another specific embodiment of the utility model, the first sealing member is installed on the side plate through a first mounting hole on the first sealing member, and the first mounting hole is located on one side edge of the first sealing member.
[0011] In another specific embodiment of the utility model, the second sealing member is installed on the rear plate through a second mounting hole on the second sealing member, and the second mounting hole is located on one side edge of the second sealing member.
[0012] In another specific embodiment of the utility model, a sealing ring is further included between the housing and the top cover.
[0013] In another specific embodiment of the utility model, the sealing ring is a frame.
[0014] In another specific embodiment of the utility model, the sealing ring includes a plurality of strip-shaped sealing strips, and the sealing strips are connected to each other to form a frame.
[0015] The utility model has the beneficial effects of the above structure: the sealing member is fixed on the top cover, the sealing member is used for blocking the air vent on the top cover, the sealing member can prevent wind, sand and dust from entering the inside of the top cover, and when the air pressure in the top cover increases to a threshold value, the sealing member is deformed by the impact of the gas in the top cover, thereby exhausting, so that the top cover has good dustproof sealing performance and the exhaust demand of the top cover is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1This is a schematic diagram of the structure of the circuit breaker described in this utility model;
[0017] Figure 2 This is a partial structural schematic diagram of the circuit breaker described in this utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the sealing ring described in this utility model;
[0019] Figure 4 This is a schematic diagram of the top cover of the present invention and its sealing structure.
[0020] In the figure: 1. Housing; 2. Top cover; 21. Top plate; 22. Side plate; 221. First vent; 23. Rear plate; 231. Second vent; 24. First seal; 241. First mounting hole; 25. Second seal; 251. Second mounting hole; 3. Face shield; 4. Secondary terminal; 5. Arc extinguishing chamber; 100. Sealing ring. Detailed Implementation
[0021] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.
[0022] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back are in the form of... Figure 1 The description of the location and state is intended to facilitate public understanding and should not be construed as a special limitation on the technical solution provided by this utility model.
[0023] like Figure 1 This is a schematic diagram of a switch. The switch includes a housing 1, a top cover 2, a faceplate 3, and secondary terminals 4. The housing 1 is the inner housing of the switch, and an arc-extinguishing cavity is formed inside it. The contact system of the switch is installed inside the arc-extinguishing cavity. The contact system includes a moving contact and a stationary contact. After the moving contact is activated, it contacts or separates from the stationary contact, so that the switch can switch between closed and open states.
[0024] like Figure 2 The housing 1 includes a base and a bottom plate, which are joined together. An opening is provided at the top of the housing 1, through which the arc-extinguishing chamber 5 of the switch is inserted downward, thereby positioning the arc-extinguishing chamber 5 above the contact system.
[0025] The top cover 2 is located on top of the housing 1, and the top cover 2 covers the top of the arc-extinguishing chamber 5, that is, the gas discharged outward from the arc-extinguishing chamber 5 is located inside the top cover 2.
[0026] The face mask 3 and the secondary terminal 4 are located on the front side of the housing 1. The secondary terminal 4 is located on the upper part of the front side of the housing 1, while the face mask 3 is located below the secondary terminal 4.
[0027] like Figure 2 , Figure 3 A sealing ring 100 is provided at the top of the housing 1. Preferably, the sealing ring 100 is a frame located between the housing 1 and the top cover 2, that is, the housing 1 and the top cover 2 clamp the sealing ring 100. The sealing ring 100 is used to seal the gap between the housing 1 and the top cover 2, preventing external wind and sand from entering the interior of the top cover 2 through the gap.
[0028] More specifically, the sealing ring 100 is square-shaped. Preferably, the sealing ring 100 is a rubber component. When the sealing ring 100 is clamped, it deforms, resulting in a better sealing effect. For example, the sealing ring 100 is made of silicone rubber. The sealing ring 100 can be disassembled into several strips, that is, the sealing ring 100 includes multiple strip-shaped sealing strips, which are connected end-to-end to form a frame. Compared with a single sealing ring 100, this improves the ease of installation.
[0029] like Figure 4 This is a schematic diagram of the top cover 2. The top cover 2 is rectangular and includes a top plate 21, side plates 22, and a rear plate 23. The side plates 22 are a pair, extending downward from both sides of the top plate 21, while the rear plate 23 extends downward from the rear side of the top plate 21. That is, the pair of side plates 22 and the rear plate 23 extend downward from the corresponding edges of the top plate 21, forming a hat shape.
[0030] An insulating plate is installed on the upper part of the top plate 21.
[0031] The top cover 2 is fixed with sealing elements, which block multiple vent holes of the top cover 2 to prevent external wind and sand from entering the interior of the top cover 2. When the internal air pressure of the top cover 2 rises to a threshold, the sealing elements are deformed by the impact of the internal gas, creating gaps between them and the top cover 2. This allows the gas inside the top cover 2 to escape through the vent holes and gaps. These gaps should be understood as through-flow air passages, and their shape is not limited.
[0032] Specifically, the vent includes a first vent 221 and a second vent 231. The sealing element includes a first sealing element 24 and a second sealing element 25.
[0033] The side plate 22 is provided with a first vent hole 221. The number of the first vent hole 221 is not limited and can be one or several. The first vent hole 221 is in communication with the inside and outside of the top cover 2. The gas inside the top cover 2 can be discharged through the first vent hole 221.
[0034] The rear plate 23 is provided with a second vent hole 231. The number of the second vent hole 231 is not limited and can be one or several. The second vent hole 231 is in communication with the inside and outside of the top cover 2. The gas inside the top cover 2 can be discharged through the second vent hole 231.
[0035] The top cover 2 is provided with a sealing member for sealing the first vent hole 221 and the second vent hole 231. When the pressure inside the top cover 2 reaches a threshold value, the sealing effect of the sealing member is lost, thereby releasing the gas inside the top cover 2.
[0036] Specifically, when the first vent hole 221 is matched with the first sealing member 24, the first sealing member 24 is installed on the side plate 22 to seal the first vent hole 221 and prevent the sand and dust outside the top cover 2 from entering the inside of the top cover 2. When the pressure inside the top cover 2 reaches a threshold value, the first sealing member 24 is impacted by the gas inside the top cover 2 and deformed. The gas inside the top cover 2 is discharged to the outside through the first vent hole 221 and the gap. The first sealing member 24 is installed on the side plate 22 through the first mounting hole 241.
[0037] When the second vent hole 231 is matched with the second sealing member 25, the second sealing member 25 is installed on the rear plate 23 to seal the second vent hole 231 and prevent the sand and dust outside the top cover 2 from entering the inside of the top cover 2. When the pressure of the arc inside the top cover 2 reaches a threshold value, the second sealing member 25 is impacted by the gas inside the top cover 2 and deformed. The gas inside the top cover 2 is discharged to the outside through the second sealing member 25 and the gap. The second sealing member 25 is installed on the rear plate 23 through the second mounting hole 251.
[0038] More specifically, the first mounting hole 241 is located on one side edge of the first seal 24, preferably the upper edge, and the second mounting hole 251 is located on one side edge of the second seal 25, preferably the upper edge. After the first seal 24 and the second seal 25 are fixed on one side, they can be deformed under the push of the gas, thus generating a gap and opening the first vent hole 221 and the second vent hole 231.
[0039] The first seal 24 and the second seal 25 are usually made of elastic materials, such as rubber.
[0040] When the seal is deformed, when the internal pressure of the top cover 2 is reduced below the threshold value, the seal can return to the state before deformation, at which time the seal also has a sealing effect.
Claims
1. A switch, wherein a top cover (2) is located on top of a housing (1), the top cover (2) covering the top of an arc-extinguishing chamber (5), and the top cover (2) has a vent hole, characterized in that: A sealing element is fixed on the top cover (2). The sealing element is used to block the vent hole on the top cover (2). When the internal air pressure of the top cover (2) rises to a threshold, the sealing element is deformed by the impact of the internal gas, thereby releasing the gas.
2. A switch according to claim 1, characterized in that: The top cover (2) includes a top plate (21), side plates (22) and a rear plate (23). The side plates (22) are a pair and extend downward from both sides of the top plate (21), while the rear plate (23) extends downward from the rear side of the top plate (21). The ventilation hole includes a first ventilation hole (221), which is located on the side plate (22) and connects the interior and exterior of the top cover (2).
3. A switch according to claim 1, characterized in that: The top cover (2) includes a top plate (21), side plates (22) and a rear plate (23). The side plates (22) are a pair and extend downward from both sides of the top plate (21), while the rear plate (23) extends downward from the rear side of the top plate (21). The ventilation hole includes a second ventilation hole (231), which is located on the rear plate (23) and connects the interior and exterior of the top cover (2).
4. A switch according to claim 2, characterized in that: The sealing element includes a first sealing element (24), the first vent (221) cooperates with the first sealing element (24), the first sealing element (24) is installed on the side plate (22) to seal the first vent (221).
5. A switch according to claim 3, characterized in that: The sealing element includes a second sealing element (25), the second vent (231) cooperates with the second sealing element (25), the second sealing element (25) is installed on the rear plate (23) to seal the second vent (231).
6. A switch according to claim 4, characterized in that: The first seal (24) is mounted to the side plate (22) through a first mounting hole (241) located on one side edge of the first seal (24).
7. A switch according to claim 5, characterized in that: The second seal (25) is mounted to the rear plate (23) through a second mounting hole (251) located on one side edge of the second seal (25).
8. A switch according to claim 1, characterized in that: It also includes a sealing ring (100) located between the housing (1) and the top cover (2).
9. A switch according to claim 8, characterized in that: The sealing ring (100) is a frame.
10. A switch according to claim 8, characterized in that: The sealing ring (100) includes multiple strip-shaped sealing strips, which are connected end to end to form a frame.