Anti-breakdown flame-retardant self-load knife switch

Abstract

The utility model relates to the technical field of knife switches, and particularly discloses an anti-breakdown flame-retardant self-load knife switch, which comprises a switch seat body and is characterized in that a plurality of knife switch bodies are arranged on the switch seat body, and a plurality of second circulation ports and first circulation ports are formed in the switch seat body; the protection mechanism and the fixing bolt are used for protecting the installed fixing bolt; according to the utility model, in combination with actual use conditions, material selection, structural layout and process implementation of all parts of a product are optimized and innovated, a novel gate seat body structure can be researched and developed according to air circulation path characteristics of the back of the gate seat body by utilizing the functions of the first circulation port and the second circulation port, carbonization paths between terminals are effectively blocked, and the service life of the gate seat body is prolonged. The brake seat body is made of a V-grade flame-retardant material, all parts are made of non-magnetic stainless steel, the installation mode is closed, dust adsorption is reduced, and the high-voltage-resistant, anti-breakdown and flame-retardant characteristics of a product are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of knife switches, and in particular relates to an anti-breakdown flame-retardant self-load knife switch. Background Art

[0002] A knife switch, also known as an open-type load switch or knife switch, is a basic manual electrical device, mainly used to control the on and off of a circuit. The knife switch can connect, carry and disconnect current under normal or overload conditions. At the same time, in the case of infrequent operation, it can be used to connect and disconnect loads below the rated current, such as small motors and electric furnaces; it is usually used to isolate power supplies or manually connect and disconnect DC circuits, and is particularly suitable for small-capacity motor control circuits to realize operations such as starting and stopping motors.

[0003] The base plate material of the self-load knife switch in the prior art is ordinary insulating material rather than flame-retardant material. The base plate is a whole closed structure with general pressure and current resistance characteristics and is easily broken down. The mounting bracket and bolts of the moving and static contacts are made of ordinary magnetic carbon steel and are installed in an exposed manner. Affected by the use environment and conditions, the electric field formed by the high voltage between the self-load knife terminals can easily cause the insulating base plate to absorb dust to form a carbonized layer, and the arc penetrates the two terminals, thereby causing flash discharge and burning between the two terminals, which correspondingly reduces the service life and use efficiency of the knife switch. Therefore, an anti-breakdown flame-retardant self-load knife switch is proposed.

[0004] The utility model is optimized and innovated in terms of material selection, structural layout, and process implementation of each component of the product in combination with actual use conditions. By utilizing the functions of the first flow port and the second flow port, a new gate seat body structure can be developed according to the air flow path characteristics on the back of the gate seat body to effectively block the carbonization path between the terminals. The gate seat body is made of V0 grade flame retardant material, and each part is made of non-magnetic stainless steel. The installation form adopts a closed installation to reduce dust adsorption, effectively improving the product's high pressure resistance, anti-breakdown and flame retardant properties. Utility Model Content

[0005] The utility model aims to provide an anti-breakdown flame-retardant self-load knife switch to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The anti-breakdown flame-retardant self-load knife switch includes a gate seat body and also includes:

[0008] The gate seat body is provided with a plurality of knife switch bodies, and the gate seat body is provided with a plurality of second flow openings and a first flow opening;

[0009] A protection mechanism and a fixing bolt are used to protect the fixing bolt after installation. The protection mechanism is located outside the fixing bolt. The protection mechanism includes a plurality of L-shaped plates. A limiting slide groove is provided on one side of the top of the L-shaped plate. A limiting cross bar is fixedly connected to the inside of the limiting slide groove. A telescopic spring is connected to one side of the inner wall of the limiting slide groove. A sliding magnet is slidably connected to the outer wall of the limiting cross bar. A protective shell is fixedly connected to the top of the sliding magnet.

[0010] Preferably, the first flow opening is located in the middle of the gate seat body, and the first flow opening and the second flow opening are both located below the knife switch body.

[0011] Preferably, the material of the gate seat body is V-level flame retardant material, and the material of the knife switch body, L-shaped plate and fixing bolts are all non-magnetic stainless steel.

[0012] Preferably, two sides of the bottom of the knife switch body are located between two L-shaped plates, and outer walls on two sides of the bottom of the knife switch body are fitted with outer walls of the two L-shaped plates.

[0013] Preferably, the L-shaped plate and the gate seat body are both provided with a plurality of bolt holes, and the plurality of bolt holes on the gate seat body are located on both sides of the second flow opening, and the fixing bolts fix the L-shaped plate and the gate seat body through the plurality of bolt holes.

[0014] Preferably, the sliding magnetic block and the mounting magnetic block are arranged to attract each other with opposite poles, and the outer side wall of the sliding magnetic block and the inner side wall of the limiting sliding groove are arranged to slide and fit together.

[0015] Preferably, one end of the telescopic spring away from the limiting sliding groove is connected to one side of the sliding magnetic block, and the telescopic spring is sleeved on the outer wall of the limiting cross bar.

[0016] Preferably, the fixing bolt is located inside the protective shell, and the bottom of the protective shell and the top outer wall of the L-shaped plate are slidably fitted.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model is optimized and innovated in terms of material selection, structural layout, and process implementation of each component of the product in combination with actual use conditions. By utilizing the functions of the first flow port and the second flow port, a new gate seat body structure can be developed according to the air flow path characteristics on the back of the gate seat body to effectively block the carbonization path between the terminals. The gate seat body is made of V-grade flame retardant material, and each part is made of non-magnetic stainless steel. The installation form adopts a closed installation to reduce dust adsorption, effectively improving the product's high pressure resistance, anti-breakdown and flame retardant properties.

[0019] Through the function of the protection mechanism and the role of the fixing bolts being located inside the protective shell, after the fixing bolts are installed, they can be stably located inside the protective shell, reducing the contact area between the fixing bolts and the outside air, preventing the fixing bolts from being corroded by humid gases or dust in the outside air, causing damage and difficulty in disassembly, thereby correspondingly improving the use effect and service life of the fixing bolts, making it easier for staff to disassemble, repair and replace the knife switch body when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a bottom structure diagram of the utility model;

[0022] Figure 3 This is a top view of the L-shaped plate of the utility model;

[0023] Figure 4 For this utility model Figure 3 Enlarged structural diagram of point A.

[0024] In the figure: 1. gate seat body; 2. knife switch body; 201. first flow port; 202. second flow port; 3. L-shaped plate; 301. fixing bolt; 302. limiting slide groove; 303. limiting cross bar; 304. telescopic spring; 305. sliding magnetic block; 306. mounting magnetic block; 307. protective shell. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] like Figure 1-4 As shown, the anti-breakdown flame-retardant self-load knife switch includes a gate seat body 1, and also includes: a plurality of knife switch bodies 2 are arranged on the gate seat body 1, and a plurality of second flow openings 202 and first flow openings 201 are opened on the gate seat body 1;

[0028] The utility model further specifically describes that the first flow port 201 is located in the middle of the gate seat body 1, and the first flow port 201 and the second flow port 202 are both located below the knife switch body 2. The gate seat body 1 is made of V0 grade flame retardant material, and the knife switch body 2, the L-shaped plate 3 and the fixing bolt 301 are all made of non-magnetic stainless steel;

[0029] As can be seen from the above, the utility model combines actual use conditions, optimizes and innovates in the material selection of each component of the product, structural layout, and process implementation. By utilizing the functions of the first flow port 201 and the second flow port 202, a new gate seat body 1 structure can be developed according to the air flow path characteristics on the back of the gate seat body 1 to effectively block the carbonization path between the terminals. The gate seat body 1 is made of V0 grade flame retardant material, and each part is made of non-magnetic stainless steel. The installation form adopts a closed installation to reduce dust adsorption, effectively improving the product's high pressure resistance, anti-breakdown and flame retardant properties.

[0030] Embodiment 2

[0031] like Figure 1-4 As shown, on the basis of the above-mentioned embodiment 1, a protection mechanism and a fixing bolt 301 are additionally provided, which are used to protect the fixing bolt 301 after installation. The protection mechanism is located outside the fixing bolt 301, and the protection mechanism includes a plurality of L-shaped plates 3, a limiting slide groove 302 is provided on one side of the top of the L-shaped plate 3, a limiting cross bar 303 is fixedly connected inside the limiting slide groove 302, a telescopic spring 304 is connected to one side of the inner wall of the limiting slide groove 302, a sliding magnetic block 305 is slidably connected to the outer wall of the limiting cross bar 303, and a protective shell 307 is fixedly connected to the top of the sliding magnetic block 305;

[0032] The utility model is further specifically described in detail. The bottom sides of the knife switch body 2 are located between the two L-shaped plates 3. The outer walls of the bottom sides of the knife switch body 2 are fitted with the outer walls of the two L-shaped plates 3. A plurality of bolt holes are provided on the L-shaped plates 3 and the gate seat body 1, and the plurality of bolt holes on the gate seat body 1 are located on both sides of the second flow port 202. The fixing bolts 301 fix the L-shaped plates 3 and the gate seat body 1 through the plurality of bolt holes. The sliding magnetic block 305 and the mounting magnetic block 306 are arranged to attract each other with corresponding opposite poles. The outer wall of the sliding magnetic block 305 and the inner wall of the limiting slide groove 302 are slidably fitted. One end of the telescopic spring 304 away from the limiting slide groove 302 is connected to one side of the sliding magnetic block 305. The telescopic spring 304 is sleeved on the outer wall of the limiting cross bar 303. The fixing bolt 301 is located inside the protective shell 307. The bottom of the protective shell 307 and the top outer wall of the L-shaped plate 3 are slidably fitted.

[0033] As can be seen from the above, by inserting the knife switch body 2 into the second flow port 202, and then inserting the two L-shaped plates 3 into the second flow port 202, and fitting the bottom outer wall of the knife switch body 2, at this time, the L-shaped plate 3 corresponds to the threaded hole on the gate seat body 1, and then inserting the fixing bolt 301 into the threaded hole, and correspondingly fixing the L-shaped plate 3 and the gate seat body 1, so that the bottom of the knife switch body 2 is stably clamped and installed between the two L-shaped plates 3;

[0034] It should be noted that the size of the bottom outer wall of the knife switch body 2 is adapted to the distance between the two L-shaped plates 3;

[0035] By utilizing the function of the fixing bolt 301 being located inside the protective shell 307, the fixing bolt 301 can be stably located inside the protective shell 307 after being installed, thereby reducing the contact area between the fixing bolt 301 and the outside air, and preventing the fixing bolt 301 from being corroded by the moist gas or dust in the outside air, which may cause damage and make it difficult to disassemble. Accordingly, the use effect and service life of the fixing bolt 301 are improved, so that it is convenient for the staff to disassemble, repair and replace the knife switch body 2 when it is damaged.

[0036] When the staff disassembles the knife switch body 2, the staff slides the protective shell 307 to separate it from the fixing bolt 301, and accordingly exposes the fixing bolt 301 to the outside. As the protective shell 307 continues to slide, the sliding magnetic block 305 and the mounting magnetic block 306 can be attracted to each other, so that the protective shell 307 can be fixed, and then the staff can disassemble the fixing bolt 301.

[0037] Through the action of the telescopic spring 304, after the L-shaped plate 3 is installed, the protective shell 307 can be slid so that the protective shell 307 automatically returns to the initial position according to the action of the telescopic spring 304, and the position of the protective shell 307 can be limited at the same time, thereby improving the protective effect of the protective shell 307 on protecting the internal fixing bolts 301;

[0038] It should be noted that a through hole is opened on one side of the protective shell 307, and the through hole is larger than the size of the fixing bolt 301, so that the protective shell 307 can be stably separated from the fixing bolt 301.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Anti-breakdown flame-retardant self-load knife switch, characterized in that: It comprises a gate seat body (1), and also comprises: A plurality of knife switch bodies (2) are arranged on the gate seat body (1), and a plurality of second flow openings (202) and first flow openings (201) are opened on the gate seat body (1); A protection mechanism and a fixing bolt (301) are used to protect the fixing bolt (301) after installation. The protection mechanism is located outside the fixing bolt (301). The protection mechanism includes a plurality of L-shaped plates (3). A limiting slide groove (302) is provided on one side of the top of the L-shaped plate (3). A limiting cross bar (303) is fixedly connected inside the limiting slide groove (302). A telescopic spring (304) is connected to one side of the inner wall of the limiting slide groove (302). A sliding magnet (305) is slidably connected to the outer wall of the limiting cross bar (303). A protective shell (307) is fixedly connected to the top of the sliding magnet (305).

2. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: The first flow opening (201) is located in the middle of the gate seat body (1), and the first flow opening (201) and the second flow opening (202) are both located below the knife switch body (2).

3. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: The material of the gate seat body (1) is V(0) grade flame retardant material, and the material of the knife switch body (2), the L-shaped plate (3) and the fixing bolt (301) are all non-magnetic stainless steel.

4. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: Both sides of the bottom of the knife switch body (2) are located between the two L-shaped plates (3), and the outer walls on both sides of the bottom of the knife switch body (2) are fitted with the outer walls of the two L-shaped plates (3).

5. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: The L-shaped plate (3) and the gate seat body (1) are both provided with a plurality of bolt holes, and the plurality of bolt holes on the gate seat body (1) are located on both sides of the second flow opening (202), and the fixing bolts (301) fix the L-shaped plate (3) and the gate seat body (1) through the plurality of bolt holes.

6. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: The sliding magnetic block (305) and the mounting magnetic block (306) are arranged to attract each other with opposite poles, and the outer wall of the sliding magnetic block (305) and the inner wall of the limiting sliding groove (302) are arranged to slide and fit together.

7. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: One end of the telescopic spring (304) away from the limiting sliding groove (302) is connected to one side of the sliding magnetic block (305), and the telescopic spring (304) is sleeved on the outer wall of the limiting cross bar (303).

8. The anti-breakdown flame-retardant self-load knife switch according to claim 1, characterized in that: The fixing bolt (301) is located inside the protective shell (307), and the bottom of the protective shell (307) and the top outer wall of the L-shaped plate (3) are slidably fitted.

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