An explosion-proof switch with double-layer sealing structure

Abstract

The utility model provides a kind of explosion-proof switch of double-layer sealing structure, including lower explosion-proof shell and upper explosion-proof shell, and the lower explosion-proof shell is detachably fixed and installed between upper explosion-proof shell, the top of the lower explosion-proof shell is fixed with outer pressure side, the inner wall of the outer pressure side is fixed with inner pressure side, annular pressure groove is formed between the outer pressure side and inner pressure side, and the bottom of the upper explosion-proof shell is fixed with outer fixed ring.The utility model's lower explosion-proof shell and upper explosion-proof shell are nested between annular pressure groove formed between outer pressure side and inner pressure side and inner fixed ring, outer fixed ring is nested with outer pressure side, and sealing ring is set in nesting part, multiple sealing is realized, meanwhile, the groove bottom of annular pressure groove is provided with oil injection flow channel communicated with outside, can realize injecting sealing oil to annular pressure groove inside, realize oil seal, effectively improve the sealing performance of the explosion-proof switch.

Description

Technical Field

[0001] This utility model belongs to the field of explosion-proof switch technology, and relates to an explosion-proof switch with a double-layer sealing structure. Background Technology

[0002] Explosion-proof switches are mainly used in hazardous explosive environments. Their explosion-proof performance ensures the safety of their use.

[0003] Current explosion-proof switches are mainly composed of an upper explosion-proof housing and a lower explosion-proof housing. The existing upper and lower explosion-proof housings are mainly sealed by a sealing ring, which affects the sealing performance between the upper and lower explosion-proof housings. To address this issue, we designed an explosion-proof switch with a double-layer sealing structure to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof switch with a double-layer sealing structure to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solution: An explosion-proof switch with a double-layer sealing structure includes a lower explosion-proof housing and an upper explosion-proof housing. The lower explosion-proof housing and the upper explosion-proof housing are detachably and fixedly installed. An outer pressure edge is fixedly provided on the top of the lower explosion-proof housing, and an inner pressure edge is fixedly provided on the inner wall of the outer pressure edge. An annular pressure groove is formed between the outer pressure edge and the inner pressure edge. An outer fixing ring is fixedly provided at the bottom of the upper explosion-proof housing. An inner fixing ring is fixedly connected to the upper explosion-proof housing inside the outer fixing ring. The inner fixing ring is nested inside the annular pressure groove, and the outer fixing ring is nested and connected to the outer pressure edge.

[0006] In the above-mentioned explosion-proof switch with a double-layer sealing structure, a rotary switch is rotatably connected at the center of the upper explosion-proof housing, and a terminal block is fixedly provided at the bottom of the upper explosion-proof housing, with the control end of the terminal block fixedly connected to the rotary switch.

[0007] In the above-mentioned explosion-proof switch with a double-layer sealing structure, upper fixing blocks are fixedly provided on both sides of the upper explosion-proof housing, wire guides are fixedly provided on both sides of the lower explosion-proof housing, and lower fixing blocks are fixedly provided at the top of the two wire guides. Locking bolts are threadedly connected between the upper fixing blocks and the lower fixing blocks.

[0008] In the aforementioned explosion-proof switch employing a double-layer sealing structure, the bottom of the annular pressure groove is provided with an oil injection channel communicating with the outside, and a sealing plug is nested at the end of the oil injection channel.

[0009] In the explosion-proof switch with a double-layer sealing structure described above, multiple sealing rings are equidistantly nested at the connection points between the annular pressure groove and the inner and outer parts of the inner fixing ring, and between the outer fixing ring and the outer pressure edge.

[0010] In the above-mentioned explosion-proof switch with a double-layer sealing structure, mounting blocks are fixedly provided on both sides of the bottom end of the lower explosion-proof housing, and strip-shaped through grooves are opened on the surface of the two mounting blocks.

[0011] Compared with the prior art, the advantages of the explosion-proof switch with a double-layer sealing structure of this utility model are as follows: the lower explosion-proof shell and the upper explosion-proof shell of the explosion-proof switch are nested with the inner fixed ring through an annular pressure groove formed between the outer pressure edge and the inner pressure edge, and the outer fixed ring is nested with the outer pressure edge. A sealing ring is set at the nesting part to achieve multiple seals. At the same time, the bottom of the annular pressure groove is provided with an oil injection channel that communicates with the outside, which can realize the injection of sealing oil into the annular pressure groove to achieve oil sealing, effectively improving the sealing performance of the explosion-proof switch. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an explosion-proof switch with a double-layer sealing structure according to this utility model.

[0013] Figure 2 This is a cross-sectional structural diagram of an explosion-proof switch with a double-layer sealing structure according to this utility model.

[0014] Figure 3 This utility model relates to an explosion-proof switch employing a double-layer sealing structure. Figure 2 Enlarged view of a portion of point A in the middle.

[0015] Figure 4 This is a top view of the lower explosion-proof housing of an explosion-proof switch with a double-layer sealing structure according to this utility model.

[0016] In the diagram, 1. Lower explosion-proof housing; 2. Upper explosion-proof housing; 3. Rotary switch; 4. Upper fixing block; 5. Wiring socket; 6. Lower fixing block; 7. Locking bolt; 8. Terminal block; 9. Outer fixing ring; 10. Outer pressure edge; 11. Inner pressure edge; 12. Annular pressure groove; 13. Oil injection channel; 14. Sealing ring; 15. Inner fixing ring; 16. Sealing plug. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figures 1-4As shown, this utility model discloses an explosion-proof switch with a double-layer sealing structure, including a lower explosion-proof housing 1 and an upper explosion-proof housing 2. The lower explosion-proof housing 1 and the upper explosion-proof housing 2 are detachably and fixedly installed. An outer pressure edge 10 is fixedly provided on the top of the lower explosion-proof housing 1, and an inner pressure edge 11 is fixedly provided on the inner wall of the outer pressure edge 10. An annular pressure groove 12 is formed between the outer pressure edge 10 and the inner pressure edge 11. An outer fixing ring 9 is fixedly provided at the bottom of the upper explosion-proof housing 2. An inner fixing ring 15 is provided inside the outer fixing ring 9 and is fixedly connected to the upper explosion-proof housing 2. The inner fixing ring 15 is nested inside the annular pressure groove 12, and the outer fixing ring 9 is nested and connected to the outer pressure edge 10.

[0019] Specifically, the lower explosion-proof housing 1 and the upper explosion-proof housing 2 of the explosion-proof switch are nested with an inner fixing ring 15 through an annular pressure groove 12 formed between the outer pressure edge 10 and the inner pressure edge 11, and the outer fixing ring 9 is nested with the outer pressure edge 10. A sealing ring 14 is provided at the nesting part to achieve multiple seals. At the same time, an oil injection channel 13 communicating with the outside is opened at the bottom of the annular pressure groove 12, which can inject sealing oil into the annular pressure groove 12 to achieve oil sealing and effectively improve the sealing performance of the explosion-proof switch.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses an explosion-proof switch with a double-layer sealing structure. A rotary switch 3 is rotatably connected to the center of the upper explosion-proof housing 2, and a terminal block 8 is fixedly provided at the bottom of the upper explosion-proof housing 2. The control end of the terminal block 8 is fixedly connected to the rotary switch 3.

[0021] Upper fixing blocks 4 are fixed on both sides of the upper explosion-proof housing 2, and wire guides 5 are fixed on both sides of the lower explosion-proof housing 1. Lower fixing blocks 6 are fixed on the top of the two wire guides 5. Locking bolts 7 are threadedly connected between the upper fixing blocks 4 and the lower fixing blocks 6.

[0022] Specifically, the locking bolt 7 facilitates the fixing of the upper fixing block 4 and the lower fixing block 6.

[0023] The bottom of the annular pressure groove 12 is provided with an oil injection channel 13 that communicates with the outside. A sealing plug 16 is nested at the end of the oil injection channel 13.

[0024] Specifically, the oil injection channel 13 facilitates the injection of oil into the annular pressure groove 12.

[0025] Multiple sealing rings 14 are nested at equal intervals at the connection points between the annular groove 12 and the inner and outer parts of the inner fixing ring 15, and between the outer fixing ring 9 and the outer pressure edge 10.

[0026] Specifically, the sealing performance between the upper explosion-proof housing 2 and the lower explosion-proof housing 1 is improved through the cooperation of multiple sealing rings 14.

[0027] Mounting blocks are fixedly provided on both sides of the bottom end of the lower explosion-proof housing 1, and strip-shaped through grooves are opened on the surface of the two mounting blocks.

[0028] Specifically, the installation of the mounting block facilitates the installation of the explosion-proof switch.

[0029] In specific implementation, when assembling the lower explosion-proof housing 1 and the upper explosion-proof housing 2, first align the outer pressure edge 10 at the top of the lower explosion-proof housing 1 with the outer fixing ring 9 of the upper explosion-proof housing 2, so that the upper explosion-proof housing 2 and the lower explosion-proof housing 1 fit together. At this time, the inner fixing ring 15 is embedded in the annular pressure groove 12 between the outer pressure edge 10 and the inner pressure edge 11. It should be noted that the size of the inner fixing ring 15 is adapted to the size of the annular pressure groove 12, and the outer diameter of the outer pressure edge 10 is adapted to the inner diameter of the outer fixing ring 9, thus completing the connection between the upper explosion-proof housing 2 and the lower explosion-proof housing 1. Then, the upper fixing block 4 and the lower fixing block 6 are fixed together by the locking bolt 7. Then, the sealing plug 16 on the side of the lower explosion-proof housing 1 is manually pulled out. Using a syringe, an appropriate amount of sealing oil is injected into the annular pressure groove 12 from the oil injection channel 13. The amount of sealing oil is injected according to actual needs, which will not be elaborated here. This achieves oil sealing and effectively improves the sealing performance of the explosion-proof switch.

[0030] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. An explosion-proof switch employing a double-layer sealing structure, comprising a lower explosion-proof housing (1) and an upper explosion-proof housing (2), characterized in that, The lower explosion-proof housing (1) and the upper explosion-proof housing (2) are detachably fixedly installed. The top of the lower explosion-proof housing (1) is fixedly provided with an outer pressure edge (10), and the inner wall of the outer pressure edge (10) is fixedly provided with an inner pressure edge (11). An annular pressure groove (12) is formed between the outer pressure edge (10) and the inner pressure edge (11). The bottom end of the upper explosion-proof housing (2) is fixedly provided with an outer fixing ring (9). The inner fixing ring (15) is fixedly connected to the upper explosion-proof housing (2) inside the outer fixing ring (9). The inner fixing ring (15) is nested inside the annular pressure groove (12). The outer fixing ring (9) is nested and connected to the outer pressure edge (10).

2. The explosion-proof switch with a double-layer sealing structure according to claim 1, characterized in that, A rotary switch (3) is rotatably connected at the center of the upper explosion-proof housing (2), and a terminal block (8) is fixedly provided at the bottom of the upper explosion-proof housing (2). The control end of the terminal block (8) is fixedly connected to the rotary switch (3).

3. The explosion-proof switch with a double-layer sealing structure according to claim 1, characterized in that, Upper fixing blocks (4) are fixed on both sides of the upper explosion-proof housing (2), and wire guides (5) are fixed on both sides of the lower explosion-proof housing (1). Lower fixing blocks (6) are fixed on the top of the two wire guides (5). Locking bolts (7) are threadedly connected between the upper fixing blocks (4) and the lower fixing blocks (6).

4. The explosion-proof switch with a double-layer sealing structure according to claim 1, characterized in that, The bottom of the annular pressure groove (12) is provided with an oil injection channel (13) that communicates with the outside. A sealing plug (16) is nested at the end of the oil injection channel (13).

5. The explosion-proof switch with a double-layer sealing structure according to claim 1, characterized in that, Multiple sealing rings (14) are nested at equal intervals at the connection points between the annular pressure groove (12) and the inner and outer parts of the inner fixing ring (15), and between the outer fixing ring (9) and the outer pressure edge (10).

6. The explosion-proof switch with a double-layer sealing structure according to claim 1, characterized in that, The lower explosion-proof housing (1) has mounting blocks fixed on both sides of its bottom end, and the surfaces of the two mounting blocks are provided with strip-shaped through grooves.

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