Isolating switch protective cover

Abstract

The utility model provides an isolating switch protective cover, which relates to the technical field of isolating switches, and comprises a ceramic protective resistance cover, the interior of the ceramic protective resistance cover is hollow, a bakelite ring is fixed in the middle between the inner walls of the ceramic protective resistance cover, a bakelite sleeve is fixed between the inner walls of the bakelite ring, and the inner walls of the bakelite sleeve are provided with a protective cover. The top of the bakelite ring is provided with a plurality of penetrating bayonets which penetrate through the bakelite ring to the bottom, bimetallic strips are clamped in the penetrating bayonets, the bimetallic strips are bent and deformed to push the baffle ring and the movable ring in opposite directions, and then the copper guide rod and the copper column are separated from each other, so that the purpose of cutting off a circuit is achieved, the service life of the circuit is prolonged, and the service life of the circuit is prolonged. And the connection between the copper guide rod and the copper column is located in the ceramic protective resistance cover, and electric arc generated during opening and closing cannot be leaked to the outside under the insulation effect of the ceramic protective resistance cover, so that the safety of external electric appliances and facilities is protected.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a protective cover for a disconnecting switch. Background Technology

[0002] High-voltage disconnect switches are important switching devices in the electrical systems of power plants and substations. They must be used in conjunction with high-voltage circuit breakers. Disconnect switches are suitable for indoor installations with three-phase AC 50Hz and a rated voltage of 12KV. They are used to connect, disconnect, or switch lines when high-voltage equipment is under voltage and load.

[0003] Currently, when disconnecting switches are used in conjunction with high-voltage circuit breakers, they transmit large currents. When the transmitted current is overloaded, the connection cannot be cut off in time, causing damage to important electrical components such as transformers due to current overload. Furthermore, an electric arc is generated after the disconnection, and the leakage of the arc can easily strike the metal, burning and damaging the metal at the connection. Utility Model Content

[0004] In order to solve the problems of the prior art, this utility model provides a protective cover for disconnecting switches.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A protective cover for a disconnecting switch includes a ceramic protective resistor cover. The interior of the ceramic protective resistor cover is hollow. A bakelite ring is fixed in the middle between the inner walls of the ceramic protective resistor cover. A bakelite sleeve is fixed between the inner walls of the bakelite ring. The top of the bakelite ring has multiple through-holes extending to the bottom. Bimetallic strips are engaged inside each of the multiple through-holes. A retaining ring is slidably arranged between the inner walls of the ceramic protective resistor cover near the top. A copper pillar is fixed to the top of the retaining ring. A movable ring is arranged between the inner walls of the ceramic protective resistor cover near the bottom.

[0007] Optionally, an insulating ring is fixed to the top of the ceramic protective resistor cover, and a copper ring is fixed to the top of the insulating ring. The top of the copper pillar slides through to the top of the ceramic protective resistor cover and fits against the inner wall of the copper ring.

[0008] Optionally, a copper guide rod is fixed between the inner walls of the movable ring, the outer surface of the copper guide rod near the top edge slides against the inner wall of the bakelite sleeve, and the top of the copper guide rod extends to fit against the bottom of the copper pillar.

[0009] Optionally, a copper sleeve is fixed to the bottom of the ceramic protective resistor cover, and a copper slider is slidably disposed between the inner walls of the copper sleeve. The bottom of the copper guide rod extends into the interior of the copper sleeve and is fixed to the top of the copper slider.

[0010] Optionally, a first spring is fixed between the inner bottom surface of the ceramic protective resistor cover and the bottom of the movable ring, and a second spring is fixed between the inner top surface of the ceramic protective resistor cover and the bottom end of the retaining ring.

[0011] Optionally, the tops of the plurality of bimetallic strips extend to fit against the bottom of the retaining ring, and the bottoms of the plurality of bimetallic strips extend to fit against the top of the movable ring.

[0012] Optionally, a copper connecting rod is fixed to one side of the copper ring and one side of the copper connecting sleeve. An external threaded ring is fixed to the bottom of the copper connecting sleeve. A washer is fixed to the outer surface of the external threaded ring near the top edge. A locking nut is threaded onto the outer surface of the external threaded ring.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0014] 1. In this utility model, both the retaining ring and the movable ring are made of insulating material. When the current is large, the current will generate more heat when passing through the bimetallic strip due to the internal resistance of the bimetallic strip. This will cause the bimetallic strip to bend and deform, pushing the retaining ring and the movable ring in opposite directions, thereby separating the copper conductor rod and the copper column to achieve the purpose of cutting off the circuit. Furthermore, the connection between the copper conductor rod and the copper column is located inside the ceramic protective resistor cover. The electric arc generated during opening and closing will not leak to the outside due to the insulation of the ceramic protective resistor cover, thus protecting the safety of external electrical facilities.

[0015] 2. In this utility model, a first spring is fixed between the inner bottom surface of the ceramic protective resistor cover and the bottom of the movable ring, and a second spring is fixed between the inner top surface of the ceramic protective resistor cover and the bottom end of the retaining ring. This facilitates the reset of the copper guide rod and the copper column. Furthermore, when the copper guide rod and the copper column are connected, the elastic pressure of the first spring and the second spring ensures that the copper guide rod and the copper column are tightly connected. Attached Figure Description

[0016] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0017] In the attached diagram:

[0018] Figure 1 This utility model provides a front-view three-dimensional structural diagram of a protective cover for an isolating switch;

[0019] Figure 2 This utility model provides a bottom-view three-dimensional structural diagram of a protective cover for an isolating switch;

[0020] Figure 3 This utility model provides a cross-sectional three-dimensional structural diagram of a protective cover for an isolating switch;

[0021] Figure 4 This utility model Figure 3 A magnified view of point A in the middle.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Ceramic protective resistor cover; 2. Insulating ring; 3. Copper ring; 4. Copper connecting rod; 5. Copper connecting sleeve; 6. External threaded ring; 7. Locking nut; 8. Washer ring; 9. Copper guide rod; 10. First spring; 11. Copper slider; 12. Copper column; 13. Second spring; 14. Bakelite ring; 15. Bakelite sleeve; 16. Bimetallic strip; 17. Through-hole bayonet; 18. Movable ring; 19. Retaining ring.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Example 1, such as Figure 1-4 As shown, this utility model provides a technical solution for a protective cover for an isolating switch: it includes a ceramic protective resistor cover 1, the interior of which is hollow. A bakelite ring 14 is fixed in the middle between the inner walls of the ceramic protective resistor cover 1, and a bakelite sleeve 15 is fixed between the inner walls of the bakelite ring 14. The top of the bakelite ring 14 has multiple through-holes 17 extending to the bottom, and bimetallic strips 16 are engaged inside the multiple through-holes 17. A retaining ring 19 is slidably arranged between the inner walls of the ceramic protective resistor cover 1 near the top, and a copper pillar 12 is fixed to the top of the retaining ring 19. A movable ring 18 is arranged between the inner walls of the ceramic protective resistor cover 1 near the bottom.

[0027] The overall effect of Embodiment 1 is that the bimetallic strip 16 is a composite material composed of two metal materials with suitable properties. Due to the different thermal expansion coefficients of the two elements, when the temperature changes, the deformation of the active layer is greater than that of the passive layer. As a result, the entire bimetallic strip 16 will bend towards the passive layer. Furthermore, both the retaining ring 19 and the movable ring 18 are made of insulating material. When the current is large, the current passing through the bimetallic strip 16 will generate more heat under the action of the internal resistance of the bimetallic strip 16, causing the bimetallic strip 16 to bend and deform, pushing the retaining ring 19 and the movable ring 18 in opposite directions. This will cause the copper conductor 9 and the copper pillar 12 to separate from each other, thereby achieving the purpose of cutting off the circuit. Moreover, the connection between the copper conductor 9 and the copper pillar 12 is located inside the ceramic protective resistor cover 1. The electric arc generated during opening and closing will not leak to the outside under the insulation of the ceramic protective resistor cover 1, thereby protecting the safety of external electrical facilities.

[0028] Example 2, as Figure 1-4 As shown, an insulating ring 2 is fixed to the top of the ceramic protective resistor cover 1, and a copper ring 3 is fixed to the top of the insulating ring 2. The top of the copper pillar 12 slides through to the top of the ceramic protective resistor cover 1 and fits against the inner wall of the copper ring 3. A copper guide rod 9 is fixed between the inner walls of the movable ring 18. The outer surface of the copper guide rod 9 near the top edge slides against the inner wall of the bakelite sleeve 15. The top of the copper guide rod 9 extends to fit against the bottom of the copper pillar 12. A copper connector 5 is fixed to the bottom of the ceramic protective resistor cover 1. A copper slider 11 is slidably arranged between the inner walls of the copper connector 5. The bottom of the copper guide rod 9 extends into the interior of the copper connector 5 and is fixed to the copper slider. At the top of 11, a first spring 10 is fixed between the inner bottom surface of the ceramic protective resistor cover 1 and the bottom of the movable ring 18, and a second spring 13 is fixed between the inner top surface of the ceramic protective resistor cover 1 and the bottom of the retaining ring 19. The tops of multiple bimetallic strips 16 extend to fit against the bottom of the retaining ring 19, and the bottoms of multiple bimetallic strips 16 extend to fit against the top of the movable ring 18. Copper connecting rods 4 are fixed on one side of the copper ring 3 and one side of the copper connecting sleeve 5. An external threaded ring 6 is fixed at the bottom of the copper connecting sleeve 5. A washer 8 is fixed on the outer surface of the external threaded ring 6 near the top edge, and a locking nut 7 is threaded on the outer surface of the external threaded ring 6.

[0029] The effect achieved by the entire embodiment 2 is that a first spring 10 is fixed between the inner bottom surface of the ceramic protective resistor cover 1 and the bottom of the movable ring 18, and a second spring 13 is fixed between the inner top surface of the ceramic protective resistor cover 1 and the bottom end of the retaining ring 19, which facilitates the reset of the copper guide rod 9 and the copper column 12. Furthermore, when the copper guide rod 9 and the copper column 12 are connected, the elastic pressure of the first spring 10 and the second spring 13 can ensure that the copper guide rod 9 and the copper column 12 are tightly connected and fitted.

[0030] Working principle: Both the retaining ring 19 and the movable ring 18 are made of insulating material. When the current is large, the current passing through the bimetallic strip 16 will generate more heat under the action of the internal resistance of the bimetallic strip 16, causing the bimetallic strip 16 to bend and deform, pushing the retaining ring 19 and the movable ring 18 in opposite directions, thereby separating the copper conductor 9 and the copper pillar 12 to achieve the purpose of cutting off the circuit. The connection between the copper conductor 9 and the copper pillar 12 is located inside the ceramic protective resistor cover 1. The electric arc generated during opening and closing will not leak to the outside due to the insulation of the ceramic protective resistor cover 1, thus protecting the safety of external electrical facilities. The first spring 10 is fixed between the bottom surface of the inner side of the ceramic protective resistor cover 1 and the bottom of the movable ring 18, and the second spring 13 is fixed between the top surface of the inner side of the ceramic protective resistor cover 1 and the bottom of the retaining ring 19, which facilitates the reset of the copper conductor 9 and the copper pillar 12. When the copper conductor 9 and the copper pillar 12 are connected, the elastic pressure of the first spring 10 and the second spring 13 can ensure that the copper conductor 9 and the copper pillar 12 are tightly connected.

[0031] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A protective cover for a disconnecting switch, comprising a ceramic protective resistor cover (1), characterized in that: The interior of the ceramic protective resistor cover (1) is hollow. A bakelite ring (14) is fixed between the inner walls of the ceramic protective resistor cover (1) at the middle. A bakelite sleeve (15) is fixed between the inner walls of the bakelite ring (14). Multiple through slots (17) extending to the bottom are opened at the top of the bakelite ring (14). Bimetallic strips (16) are engaged inside the multiple through slots (17). A retaining ring (19) is slidably arranged between the inner walls of the ceramic protective resistor cover (1) near the top. A copper pillar (12) is fixed at the top of the retaining ring (19). A movable ring (18) is arranged between the inner walls of the ceramic protective resistor cover (1) near the bottom.

2. The protective cover for a disconnecting switch according to claim 1, characterized in that: An insulating ring (2) is fixed to the top of the ceramic protective resistor cover (1), and a copper ring (3) is fixed to the top of the insulating ring (2). The top of the copper column (12) slides through to the top of the ceramic protective resistor cover (1) and fits against the inner wall of the copper ring (3).

3. The protective cover for a disconnecting switch according to claim 2, characterized in that: A copper guide rod (9) is fixed between the inner walls of the movable ring (18). The outer surface of the copper guide rod (9) near the top edge slides against the inner wall of the bakelite sleeve (15). The top of the copper guide rod (9) extends to fit against the bottom of the copper column (12).

4. A protective cover for a disconnecting switch according to claim 3, characterized in that: The bottom of the ceramic protective resistor cover (1) is fixed with a copper sleeve (5), and a copper slider (11) is slidably arranged between the inner walls of the copper sleeve (5). The bottom of the copper guide rod (9) extends into the interior of the copper sleeve (5) and is fixed to the top of the copper slider (11).

5. A protective cover for a disconnecting switch according to claim 1, characterized in that: A first spring (10) is fixed between the inner bottom surface of the ceramic protective resistor cover (1) and the bottom of the movable ring (18), and a second spring (13) is fixed between the inner top surface of the ceramic protective resistor cover (1) and the bottom of the retaining ring (19).

6. A protective cover for a disconnecting switch according to claim 1, characterized in that: The tops of the plurality of bimetallic strips (16) extend to fit against the bottom of the retaining ring (19), and the bottoms of the plurality of bimetallic strips (16) extend to fit against the top of the movable ring (18).

7. A protective cover for a disconnecting switch according to claim 4, characterized in that: A copper connecting rod (4) is fixed on one side of the copper ring (3) and one side of the copper connecting sleeve (5). An external threaded ring (6) is fixed at the bottom of the copper connecting sleeve (5). A washer (8) is fixed on the outer surface of the external threaded ring (6) near the top edge. A locking nut (7) is threaded on the outer surface of the external threaded ring (6).

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