A quick-change explosion-proof component and load switch

Abstract

This utility model discloses a quick-replacement explosion-proof component and load switch, including two opposing flanges. Each flange has a first connecting hole, and an explosion-proof spacer is positioned between the two flanges. The inner and outer walls of the explosion-proof spacer are respectively provided with an inner connecting ring and an outer connecting ring. The outer connecting ring has a second connecting hole for fixed connection with the flange. A groove is provided on the inner wall of the flange, and a pressing block is provided inside the groove. The independently designed explosion-proof spacer provided by this utility model greatly simplifies the replacement process. When maintenance is required, the explosion-proof spacer can be directly removed from between the flanges simply by loosening the fixing bolts, without disassembling the entire flange system, achieving efficient and quick component replacement. After installation and repositioning, the pressing blocks on both sides apply uniform pressure to the explosion-proof spacer, ensuring a tight fit with the flange and guaranteeing excellent sealing performance and explosion-proof effect, effectively improving the safety and reliability of equipment operation.

Description

Technical Field

[0001] This utility model relates to a quick-change explosion-proof component and a load switch. Background Technology

[0002] A load switch is an electrical device used to connect or disconnect a circuit under load, widely used in power systems, industrial automation, and power distribution networks. In hazardous locations such as petrochemical plants, underground coal mines, and dusty environments where flammable and explosive gases or dust exist, the operation of a load switch can become an ignition source. Once the internal electric arc energy reaches the minimum ignition energy threshold of the surrounding medium, an explosion can occur. Therefore, load switches operating under these special conditions must be equipped with explosion-proof components.

[0003] Traditional explosion-proof components typically use an integral flange connection structure, with the explosion-proof spacer directly embedded in one side of the flange. When it is necessary to replace the aging explosion-proof spacer, both flanges must be completely separated in order to remove the explosion-proof spacer for replacement, resulting in low maintenance efficiency. Utility Model Content

[0004] The main objective of this invention is to provide a quick-replacement explosion-proof component and load switch to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved by adopting the following technical solution:

[0006] A quick-change explosion-proof assembly includes two opposing flanges, each flange having a first connection hole. An explosion-proof spacer is provided between the two flanges. An inner connecting ring and an outer connecting ring are respectively provided on the inner and outer walls of the explosion-proof spacer. The outer connecting ring has a second connection hole for fixed connection with the flange. A groove is provided on the inner side wall of the flange. A pressing block is provided inside the groove. Multiple screws are horizontally arranged on the outer side of the pressing block. The outer ends of the screws pass through the outer side of the flange and are fitted with nuts.

[0007] Preferably, an inner retaining ring is provided on the outer wall of the inner connecting ring, and an inner retaining groove is provided on the inner wall of the explosion-proof spacer.

[0008] Preferably, an outer retaining ring is provided on the inner wall of the outer connecting ring, and an outer retaining groove is provided on the outer wall of the explosion-proof spacer.

[0009] Preferably, a boss is provided on the outer side of the flange, the groove extends through the flange and into the inside of the boss, and the outer end of the screw passes through the outer side of the boss.

[0010] Preferably, a plurality of inner guide posts are vertically arranged on the inner sidewall of the groove, and an inner guide groove that cooperates with the inner guide posts is provided on the inner sidewall of the extrusion block.

[0011] Preferably, six inner guide posts are provided, and the six inner guide posts are provided on the inner sidewall of the groove and are evenly distributed along its circumference.

[0012] Preferably, a plurality of outer guide posts are vertically arranged on the outer side wall of the groove, and an outer guide groove that cooperates with the outer guide posts is provided on the outer side wall of the extrusion block.

[0013] Preferably, there are six outer guide posts, and the six inner guide posts are disposed on the outer side wall of the groove and are evenly distributed along its circumference.

[0014] Preferably, there are six screws, which are arranged on the outside of the extrusion block and evenly distributed along its circumference.

[0015] A load switch comprising the explosion-proof components described in any of the preceding claims.

[0016] The beneficial technical effects of this utility model are as follows:

[0017] The independently designed explosion-proof spacer provided by this invention greatly simplifies the replacement process. When maintenance is required, the spacer can be removed directly from the flange by simply loosening the fixing bolts, without disassembling the entire flange system, achieving efficient and quick component replacement. After installation and repositioning, the compression blocks on both sides apply uniform pressure to the spacer, ensuring a tight fit with the flange and guaranteeing excellent sealing performance and explosion-proof effect, effectively improving the safety and reliability of equipment operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the explosion-proof component explosion structure according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the explosion-proof component according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the explosion-proof component according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the flange structure according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the explosion-proof spacer, inner connecting ring, and outer connecting ring structure of an embodiment of this utility model;

[0023] Figure 6 This is a schematic diagram of the extrusion block structure according to an embodiment of the present invention.

[0024] In the diagram: 1. Flange; 2. First connecting hole; 3. Explosion-proof spacer; 4. Inner connecting ring; 5. Outer connecting ring; 6. Second connecting hole; 7. Groove; 8. Extrusion block; 9. Screw; 10. Nut; 11. Inner snap ring; 12. Inner snap groove; 13. Outer snap ring; 14. Outer snap groove; 15. Boss; 16. Inner guide post; 17. Inner guide groove; 18. Outer guide post; 19. Outer guide groove. Detailed Implementation

[0025] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0026] like Figures 1-6 As shown, the quick-change explosion-proof assembly provided in this embodiment includes two flanges 1 arranged opposite each other. The flanges 1 are provided with a first connecting hole 2. An explosion-proof spacer 3 is provided between the two flanges 1. An inner connecting ring 4 and an outer connecting ring 5 are respectively provided on the inner and outer walls of the explosion-proof spacer 3. The outer connecting ring 5 is provided with a second connecting hole 6 for fixed connection with the flanges 1. A groove 7 is provided on the inner side wall of the flanges 1. An extrusion block 8 is provided inside the groove 7. Multiple screws 9 are horizontally arranged on the outer side of the extrusion block 8. The outer end of the screw 9 passes through the outer side of the flange 1 and is provided with a nut 10.

[0027] In this embodiment, as Figure 5 As shown, an inner snap ring 11 is provided on the outer wall of the inner connecting ring 4, an inner snap groove 12 is provided on the inner wall of the explosion-proof spacer 3, an outer snap ring 13 is provided on the inner wall of the outer connecting ring 5, and an outer snap groove 14 is provided on the outer wall of the explosion-proof spacer 3. The inner connecting ring 4 and the outer snap ring 13 are fixed by snap-fit. After the three are removed from between the flanges 1, the explosion-proof spacer 3 can be quickly replaced.

[0028] In this embodiment, as Figure 1 As shown, a boss 15 is provided on the outer side of the flange 1, and a groove 7 extends through the flange 1 and into the inside of the boss 15. The outer end of the screw 9 passes through the outer side of the boss 15, thickening the rear side of the flange 1 to provide sufficient thickness for opening the groove 7 and ensuring its strength.

[0029] In this embodiment, as Figure 4 and Figure 6 As shown, multiple inner guide posts 16 are vertically arranged on the inner sidewall of the groove 7, and an inner guide groove 17 that works in conjunction with the inner guide posts 16 is provided on the inner sidewall of the extrusion block 8 to guide the extrusion block 8 to move smoothly along a predetermined trajectory and improve motion accuracy.

[0030] In this embodiment, as Figure 4 and Figure 6As shown, there are six inner guide pillars 16. The six inner guide pillars 16 are set on the inner side wall of the groove 7 and are evenly distributed along its circumference, so that the force on the extrusion block 8 is balanced and the movement path is more accurate.

[0031] In this embodiment, as Figure 4 and Figure 6 As shown, multiple outer guide posts 18 are vertically arranged on the outer side wall of the groove 7, and an outer guide groove 19 that works with the outer guide posts 18 is provided on the outer side wall of the extrusion block 8 to guide the extrusion block 8 to move smoothly along a predetermined trajectory and improve motion accuracy.

[0032] In this embodiment, as Figure 4 and Figure 6 As shown, there are six outer guide posts 18. The six outer guide posts 18 are set on the outer wall of the groove 7 and are evenly distributed along its circumference, so that the force on the extrusion block 8 is balanced and the movement path is more accurate.

[0033] In this embodiment, as Figure 2 As shown, there are six screws 9. The six screws 9 are located on the outside of the extrusion block 8 and are evenly distributed along its circumference. The six symmetrically distributed screws 9 generate a balanced torque, which eliminates the problem of tilted installation caused by unilateral force application and ensures that each joint surface is evenly pressurized.

[0034] The replacement procedure for explosion-proof components is as follows:

[0035] Loosen the nut 10 on the screw 9 so that the compression block 8 no longer compresses the old explosion-proof spacer 3. Remove the bolts connecting the two flanges 1 and the outer connecting ring 5. The old explosion-proof spacer 3, inner connecting ring 4 and outer connecting ring 5 can then be removed together. After that, remove the old explosion-proof spacer 3 and install the new explosion-proof spacer 3.

[0036] Insert the newly installed explosion-proof spacer 3, inner connecting ring 4, and outer connecting ring 5 between the two flanges 1. Use bolts to fix the two flanges 1 and the outer connecting ring 5. Then, tighten the nuts 10 on the screw 9 in a diagonal sequence multiple times. The screw 9 drives the extrusion block 8 to move axially synchronously along the groove 7, ensuring that the six extrusion points evenly compress the new explosion-proof spacer 3 to the designed preload.

[0037] A load switch comprising any of the above-mentioned explosion-proof components.

[0038] In summary, the independently designed explosion-proof spacer 3 provided in this embodiment greatly simplifies the replacement process. When maintenance is required, the explosion-proof spacer 3 can be directly removed from the flange 1 simply by loosening the fixing bolts, without disassembling the entire flange system, achieving efficient and quick component replacement. After installation and repositioning, the compression blocks 8 on both sides apply uniform pressure to the explosion-proof spacer 3, ensuring a tight fit with the flange 1, guaranteeing excellent sealing performance and explosion-proof effect, and effectively improving the safety and reliability of equipment operation.

[0039] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A quick-change explosion-proof component, characterized in that: The device includes two flanges (1) arranged opposite to each other. The flanges (1) are provided with a first connecting hole (2). An explosion-proof spacer (3) is provided between the two flanges (1). An inner connecting ring (4) and an outer connecting ring (5) are provided on the inner and outer walls of the explosion-proof spacer (3), respectively. The outer connecting ring (5) is provided with a second connecting hole (6) that is fixedly connected to the flange (1). A groove (7) is provided on the inner side wall of the flange (1). An extrusion block (8) is provided on the inner side of the groove (7). Multiple screws (9) are horizontally arranged on the outer side of the extrusion block (8). The outer end of the screw (9) passes through the outer side of the flange (1) and is provided with a nut (10).

2. The quick-change explosion-proof component according to claim 1, characterized in that: An inner snap ring (11) is provided on the outer wall of the inner connecting ring (4), and an inner snap groove (12) is provided on the inner wall of the explosion-proof spacer (3).

3. The quick-change explosion-proof component according to claim 1, characterized in that: An outer snap ring (13) is provided on the inner wall of the outer connecting ring (5), and an outer snap groove (14) is provided on the outer wall of the explosion-proof spacer (3).

4. The quick-change explosion-proof component according to claim 1, characterized in that: A boss (15) is provided on the outside of the flange (1), and the groove (7) penetrates the flange (1) and extends into the inside of the boss (15). The outer end of the screw (9) passes through the outer side of the boss (15).

5. The quick-change explosion-proof component according to claim 1, characterized in that: Multiple inner guide posts (16) are vertically arranged on the inner sidewall of the groove (7), and an inner guide groove (17) that works in conjunction with the inner guide posts (16) is provided on the inner sidewall of the extrusion block (8).

6. The quick-change explosion-proof component according to claim 5, characterized in that: The inner guide post (16) is provided in six parts, and the six inner guide posts (16) are provided on the inner sidewall of the groove (7) and are evenly distributed along its circumference.

7. The quick-change explosion-proof component according to claim 1, characterized in that: Multiple outer guide posts (18) are vertically arranged on the outer side wall of the groove (7), and an outer guide groove (19) that cooperates with the outer guide posts (18) is provided on the outer side wall of the extrusion block (8).

8. A quick-change explosion-proof component according to claim 7, characterized in that: The outer guide post (18) is provided in six parts, and the six outer guide posts (18) are provided on the outer side wall of the groove (7) and are evenly distributed along its circumference.

9. A quick-change explosion-proof component according to claim 1, characterized in that: There are six screws (9), which are arranged on the outside of the extrusion block (8) and evenly distributed along its circumference.

10. A load switch, characterized in that: Includes the explosion-proof component as described in any one of claims 1-9.

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