Explosion-proof switch

Abstract

The utility model discloses a square switch, which comprises an explosion-proof switch, the explosion-proof switch comprises a switch cover, a Y-shaped sealing ring is mounted on the switch cover, a switch connecting core is in threaded connection in the Y-shaped sealing ring, and the top and the bottom of the switch connecting core are distributed above and below the switch cover; the switch cover is fixedly installed on the switch shell in a sealed mode, an explosion-proof switch core is installed on the switch shell, and a switch triggering part of the explosion-proof switch core is matched with the bottom of the switch connecting core and used for driving the explosion-proof switch core to be closed and opened when the switch connecting core rotates; the explosion-proof stuffing box is fixedly mounted on one side of the switch shell; and the other side of the switch shell is fixedly provided with the explosion-proof plug. According to the square switch provided by the utility model, a rotating control mode is set, so that the opening or closing of the explosion-proof switch can be controlled by rotating in a sealed manner, and the device can stably and safely carry out explosion-proof switching operation.

Description

Technical Field

[0001] The utility model relates to the technical field of switch devices, in particular to an explosion-proof switch. Background Technique

[0002] The explosion-proof stuffing box is mainly made of brass or stainless steel. Its internal structure includes a copper pipe and a metal bellows, and is filled with inert gases such as nitrogen or carbon dioxide. This structure enables the explosion-proof stuffing box to burst and relieve pressure automatically when the pressure exceeds the specified value, thus playing the role of safety isolation and fire and explosion prevention. In addition, the design of the explosion-proof stuffing box also includes a bolt-fixed clay filler, which is compacted on the inner wall through bolts to achieve the purpose of sealing. This structure is not only applicable to flammable and explosive places such as underground coal mines, but also applicable to explosion-hazardous areas such as factories and warehouses. The wide application of the explosion-proof stuffing box proves its effectiveness in improving industrial safety.

[0003] The explosion-proof plugging is an important safety device, widely used in storage and use places of various flammable and explosive items. Usually installed at the inlet and outlet of pipelines or containers, it can effectively prevent the diffusion of dangerous substances such as flames, oil mists and explosive gases. The explosion-proof plug is widely used in dangerous industries and places such as petrochemical, chemical, coal, liquefied gas, etc., which can greatly improve production safety. The explosion-proof plug can quickly block the inlet and outlet of the pipeline or container when a fire or explosion occurs inside the pipeline or container, preventing the leakage of dangerous substances to the outside. At the same time, the explosion-proof plug can also reduce the pressure and temperature inside the pipeline or container, effectively preventing the occurrence of fire and explosion accidents.

[0004] The explosion-proof characteristics of the explosion-proof switch are jointly determined by the sealing characteristics of its structure and the working principle of the switch. The existing explosion-proof switch devices usually use an operating mechanism to control the sliding movement of the internal slider to achieve the operation of the switch. In some cases, the aforementioned switch mechanism is prone to problems such as jamming or unsmooth operation, and in severe cases, it may lead to the failure of the explosion-proof switch.

[0005] Therefore, it is necessary to design a rotational control method so that the device can perform rotational control of the opening or closing of the explosion-proof switch in a sealed manner, enabling the device to perform explosion-proof switch operations stably and safely. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an explosion-proof switch, which can perform rotational control of the opening or closing of the explosion-proof switch in a sealed state, enabling the device to perform explosion-proof switch operations stably and safely.

[0007] To achieve the above object, the technical solution adopted by the utility model is to provide a square switch, including: An explosion-proof switch, including:

[0008] A Y-shaped sealing ring is installed on the switch cover. The Y-shaped sealing ring is internally threaded and connected to a switch connecting core. The top of the switch connecting core is arranged above the switch cover, and the bottom is arranged below the switch cover. The switch cover is hermetically and fixedly installed on the switch housing. An explosion-proof switch core is installed on the switch housing. The switch triggering part of the explosion-proof switch core cooperates with the bottom part of the switch connecting core to drive the explosion-proof switch core to close and open when the switch connecting core rotates. An explosion-proof stuffing box is fixedly installed on one side of the switch housing. An explosion-proof plug is fixedly installed on the other side of the switch housing.

[0009] Further, a Y-shaped sealing ring is installed on the round nut. The switch connecting core is hermetically installed with the switch cover through the round nut and the Y-shaped sealing ring.

[0010] Further, a handle is provided at the top of the switch connecting core. A square nut is fixedly installed in the side through hole of the handle. A second pan-head screw is internally threaded in the square nut. A first internal threaded hole is provided on the side of the switch connecting core, and the second pan-head screw is threadedly connected in the first internal threaded hole to fixedly install the handle on the switch connecting core. A groove is provided at the top of the switch cover. The handle is placed in the groove. An auxiliary hole is provided on the side of the groove. The second pan-head screw enters the square nut through the auxiliary hole for fixing operation.

[0011] Further, a profiled waist-shaped groove is provided at the lower end of the switch connecting core and is inserted into the cross-shaped fixing head at the head of the explosion-proof switch core.

[0012] Further, a housing sealing ring is installed on the top of the switch housing. The switch cover and the switch housing are hermetically installed together through the cooperation of the housing sealing ring, the hexagon socket head cap screw, and the internal serrated lock washer.

[0013] Further, a nameplate is fixedly installed on the switch housing by rivets.

[0014] Further, a mounting threaded hole is provided on the switch housing. The first pan-head screw presses on the wire pressing piece and is threadedly connected in the mounting threaded hole. The wire pressing piece presses the ground wire for grounding protection.

[0015] Further, the explosion-proof plug includes a plug nut. A second internal threaded hole is provided on the side of the switch housing. The plug nut is threadedly connected in the second internal threaded hole. A plug sealing ring is provided between the plug nut and the outer wall of the switch housing. An internal hexagon groove structure is provided on the plug nut.

[0016] Further, the explosion-proof stuffing box has an armored ring and an armored body structure for clamping the metal braid of the cable.

[0017] Further, the explosion-proof switch core is fixedly installed on the switch housing through cross recessed pan head screws, spring washers and pressing plates.

[0018] Compared with the prior art, the beneficial effects of the present utility model include:

[0019] 1. The switch is controlled to open or close the explosion-proof switch core by rotating the handle.

[0020] 2. The whole switch is in a sealed state, and the handle rotation is still in a sealed state, so that the explosion-proof effect of the switch is good.

[0021] 3. The explosion-proof stuffing box and explosion-proof plugging provided increase the explosion-proof effect of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic cross-sectional structure view of an embodiment of the present utility model;

[0023] Figure 2 is a schematic top view structure view of an embodiment of the present utility model;

[0024] Figure 3 is a schematic top view structure view of an embodiment of the present utility model with the switch cover removed.

[0025] Reference numerals in the drawings:

[0026] 1. First pan head screw; 2. Plugging sealing ring; 3. Plugging nut; 4. Switch housing; 5. Switch cover;

[0027] 6. Second pan head screw; 7. Square nut; 8. Handle; 9. Round nut; 10. Y-shaped sealing ring; 11. Switch connecting core; 12. Housing sealing ring; 13. Rivet; 14. Nameplate; 15. Explosion-proof stuffing box; 16. Hexagon socket head screw; 17. Explosion-proof switch core; 18. Cross recessed pan head screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be further described below with reference to the drawings and embodiments.

[0029] Please refer to Figures 1 to 3 , the explosion-proof switch provided by the embodiment of the present utility model, the switch cover 5 is of a cylindrical structure. A groove is provided at the top of the switch cover 5, and a connection hole is provided on the switch cover 5, and the connection hole communicates with the groove. A round nut 9 is fixedly installed at the connection hole, a Y-shaped sealing ring 10 is installed on the round nut 9, and a switch connecting core 11 is threadedly connected inside the round nut 9. The top of the switch connecting core 11 is located above the switch cover 5, and the bottom of the switch connecting core 11 is located below the switch cover 5.

[0030] The switch connecting core 11 is hermetically installed with the switch cover 5 through the round nut 9 and the Y-shaped sealing ring 10.

[0031] A handle 8 is installed at the top of the Y-shaped sealing ring 10. A first internal thread hole is provided in the upper part of the switch connecting core 11. A square nut 7 is fixedly installed in the side through hole of the handle 8. A second pan head screw 6 is threadedly connected inside the square nut 7, and the second pan head screw 6 is threadedly connected to the first internal thread hole on the side of the switch connecting core 11 to fix the handle 8 on the switch connecting core 11;

[0032] The handle 8 is placed in the groove. An auxiliary hole is provided on the side of the groove. The second pan head screw 6 enters the square nut 7 through the auxiliary hole for fixing operations. A tool is used to pass the second pan head screw 6 through the auxiliary hole and threadedly connect it to the square nut 7 and the second internal thread hole for fixed installation.

[0033] The switch housing 4 is designed as a copper high switch cover.

[0034] The lower end of the switch connecting core 11 is provided with a profiled waist-shaped groove that is inserted into the cross-shaped fixed head at the head of the explosion-proof switch core 17 to achieve the overall switch linkage functional effect.

[0035] An explosion-proof switch core 17 is provided on the switch housing 4. The explosion-proof switch core 17 is fixedly installed on the switch housing 4 through a cross recessed pan head screw 18, a spring washer and a pressing piece.

[0036] A housing sealing ring 12 is installed at the top of the switch housing 4. The switch cover 5 and the switch housing 4 are hermetically installed together through the cooperation of the housing sealing ring 12, the hexagon socket head cap screw 16 and the internal serrated lock washer, greatly improving the installation sealing performance of the switch housing 4 and the switch cover 5.

[0037] The switch housing 4 is fixedly installed with a nameplate 14 through a rivet 13 for identification.

[0038] An installation thread hole is provided on the switch housing 4. The first pan head screw 1 presses on the wire pressing piece and is threadedly connected to the installation thread hole, and the wire pressing piece presses the grounding wire for grounding protection.

[0039] A second internal thread hole is provided on the side of the switch housing 4. A plugging nut 3 is threadedly connected in the second internal thread hole, and a plugging sealing ring 2 is provided between the plugging nut 3 and the outer wall of the switch housing 4. The plugging nut 3 is provided with an internal hexagon groove structure for easy disassembly. The above constitutes an explosion-proof plugging.

[0040] A cable hole is provided on the side of the switch housing 4. An explosion-proof cable gland is installed at the cable hole. The explosion-proof cable gland has an armored ring and an armored body structure, which is convenient for clamping the metal braid of the cable during use.

[0041] There are two internal grounding components in the inner cavity of the switch housing 4, and one grounding component is provided on the outer locking mounting feet for users to select according to the actual usage status. After the explosion-proof switch core 17 is installed in the switch housing 4, there is still sufficient space to meet the different wiring specifications of users. With the explosion-proof stuffing box assemblies 15 and explosion-proof plugs at both ends, the wiring requirements of various solutions for market customers are greatly met.

[0042] The explosion-proof switch core 17 adopts the specification of 380V / 10A.

[0043] Specifically, the switch housing 4 is provided with two explosion-proof plugs and two explosion-proof stuffing boxes 15.

[0044] In summary, for an explosion-proof switch according to an embodiment of the present invention, the explosion-proof switch core 17 is of flameproof design, the explosion-proof plug is of explosion-proof design, the explosion-proof stuffing box assembly is of explosion-proof design, and the switch cover 5 is of increased safety explosion-proof design through the housing sealing ring 12. The overall product is of flameproof and increased safety type design, and the protection level is: IP56.

[0045] During specific implementation, first, the profiled waist-shaped groove provided at the lower end of the switch connection core 11 is inserted into the cross-shaped fixing head at the head of the explosion-proof switch core 17 to realize the overall switch linkage function. Then, the switch cover 5 is fixedly installed on the switch housing 4. Then, the second pan head screw 6 is threadedly installed on the square nut 7 and the switch connection core 11, and the handle 8 is fixedly installed on the switch connection core 11. The provided explosion-proof plugs, explosion-proof stuffing boxes, and various gaskets make the explosion-proof effect of the device excellent.

[0046] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims.

Claims

1. An explosion-proof switch, comprising a switch cover (5) and a switch housing (4), characterized in that: The switch cover (5) is provided with a Y-shaped sealing ring (10), the Y-shaped sealing ring (10) being internally threadedly connected with a switch connecting core (11), the top of the switch connecting core (11) being arranged above the switch cover (5), and the bottom being arranged below the switch cover (5); the switch cover (5) is sealed and fixedly mounted on the switch housing (4), the switch housing (4) being provided with an explosion-proof switch core (17), the switch triggering portion of the explosion-proof switch core (17) cooperating with the bottom portion of the switch connecting core (11) for driving the explosion-proof switch core (17) to close and open when the switch connecting core (11) rotates; an explosion-proof stuffing box (15) being fixedly mounted on one side of the switch housing (4); and an explosion-proof plugging being fixedly mounted on the other side of the switch housing (4).

2. An explosion-proof switch according to claim 1, characterized in that: It also includes a round nut (9) on which a Y-shaped sealing ring (10) is mounted, and the switch connecting core (11) is sealed and mounted on the switch cover (5) via the round nut (9) and the Y-shaped sealing ring (10).

3. An explosion-proof switch according to claim 2, characterized in that: A handle (8) is provided on the top of the switch connection core (11); a square nut (7) is fixedly installed in a side through hole of the handle (8); a second pan head screw (6) is internally threadedly connected to the square nut (7); a first internal threaded hole is provided on the side of the switch connection core (11); and the second pan head screw (6) is threadedly connected to the first internal threaded hole, so that the handle (8) is fixedly installed on the switch connection core (11); The top of the switch cover (5) is provided with a groove, the handle (8) is placed in the groove, the side of the groove is provided with an auxiliary hole, and the second pan head screw (6) enters the square nut (7) through the auxiliary hole for fixing.

4. An explosion-proof switch according to claim 3, characterized in that: The lower end of the switch connection core (11) is provided with a contoured waist-shaped groove for inserting into the cross fixing head of the head of the explosion-proof switch core (17).

5. An explosion-proof switch according to claim 1, characterized in that: A housing seal ring (12) is installed on the top of the switch housing (4), and the switch cover (5) and the switch housing (4) are installed together through the matching seal of the housing seal ring (12), the hexagon socket screw (16), and the internal serrated locking washer.

6. An explosion-proof switch according to claim 1, characterized in that: The switch housing (4) is fixedly mounted with a nameplate (14) via rivets (13).

7. An explosion-proof switch according to claim 1, characterized in that: The switch housing (4) is provided with a mounting threaded hole, the first pan head screw (1) is pressed on the wire pressing piece and threadedly connected to the mounting threaded hole, and the wire pressing piece presses the ground wire for grounding protection.

8. An explosion-proof switch according to claim 1, characterized in that: The explosion-proof plugging comprises a plugging nut (3), a second internal threaded hole is provided on the side of the switch housing (4), the plugging nut (3) is threadedly connected in the second internal threaded hole, a plugging sealing ring (2) is provided between the plugging nut (3) and the outer wall of the switch housing (4), and a hexagonal groove structure is provided on the plugging nut (3).

9. An explosion-proof switch according to claim 1, characterized in that: The explosion-proof stuffing box (15) has an armor ring and an armor body structure, and is used to clamp the metal braided mesh of the cable.

10. An explosion-proof switch according to claim 1, characterized in that: The explosion-proof switch core (17) is fixedly mounted on the switch housing (4) by means of a cross-slot pan head screw (18), a spring washer and a pressing sheet.

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