Explosion-proof electromagnetic valve

Abstract

The utility model discloses an explosion-proof electromagnetic valve which comprises an electromagnetic valve body, an explosion-proof upper cover assembly is arranged above the electromagnetic valve body, the explosion-proof upper cover assembly comprises an upper cover body, the lower end of the upper cover body is integrally connected with a positioning plate located in the circumferential direction, a plurality of installation holes are formed in the positioning plate in a penetrating mode, and the installation holes are communicated with the upper cover body. The positioning plate is connected with the electromagnetic valve body through a mounting bolt, and the side face of the upper cover body is integrally connected with a connecting pipe. The utility model has the advantage of explosion-proof.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electromagnetic valve, concretely is a kind of explosion-proof electromagnetic valve. BACKGROUND

[0002] The application field of electromagnetic valve is very wide, and the flow path of gas or liquid can be controlled by electromagnetic valve, mainly setting electromagnetic valve in the passage of flow path pipe, using electromagnetic valve to control flow path by lifting valve stem when electromagnetic valve is powered on. This kind of flow path control mode is very common and widely used, but for different characteristics of fluid passage, its safety problem must be considered.

[0003] Electromagnetic valve uses power supply to electromagnetic coil to make electromagnet produce suction and release to valve stem, and then control flow path. Since it is switched by using electronic on-off, spark may be generated during switching, and if flammable gas (liquid) in the outside penetrates into the inside of electromagnetic valve, it may be ignited by spark to cause explosion, so it needs to be improved. SUMMARY

[0004] The utility model discloses a kind of explosion-proof electromagnetic valves to solve the problems raised in the above background, with the advantage of explosion-proof.

[0005] To achieve the above object, the utility model provides the following technical scheme: an explosion-proof electromagnetic valve, including electromagnetic valve body, the upper portion of the electromagnetic valve body is provided with explosion-proof upper cover assembly, the explosion-proof upper cover assembly includes upper cover body, the lower end of the upper cover body is integrally connected with the positioning plate in the circumferential direction, the positioning plate is provided with a plurality of mounting holes, and the positioning plate is connected with the electromagnetic valve body by mounting bolt; The side of the upper cover body is integrally connected with a connecting pipe.

[0006] By adopting the above technical scheme, the shell of the electromagnetic valve body can meet the explosion-proof level: Exdb IIC T6 Gb Ex tb IIIC T80 DEB in dangerous places, can withstand the pressure generated by the explosion of internal explosive mixture, and prevent the explosion from spreading to the shell surrounding the explosive gas environment. The positioning plate adopts four-hole positioning, and the positioning plate is connected with the electromagnetic valve body by mounting bolt. Multiple angles can be adjusted to drive the upper cover body to rotate. When the field wiring does not change, the angle can be adjusted to make the connecting pipe face the predetermined direction of the reversing device, which is convenient and practical.

[0007] As a further scheme of the utility model: the side of the electromagnetic valve body is provided with grounding bolt.

[0008] By adopting the above technical scheme, the external grounding wire bolt and internal grounding bolt are used to prevent static electricity and lightning crisis.

[0009] As a further improvement of this utility model, an O-ring is provided on the side of the solenoid valve body facing the upper cover body.

[0010] By adopting the above technical solution and using O-rings, an IP67 protection level can be achieved, effectively protecting itself from rain.

[0011] As a further improvement of this utility model: the solenoid valve body includes an explosion-proof coil base, and heat dissipation strips are provided on both sides of the explosion-proof coil base.

[0012] By adopting the above technical solution, the heat dissipation function is enhanced. When the product is in operation, the coil body continuously generates heat, which can be effectively dissipated through the heat dissipation strips on both sides of the shell, thereby improving the product's durability.

[0013] As a further improvement of this utility model: the valve core of the solenoid valve body is provided with a plurality of inwardly recessed annular grooves on the side, and a spacer is installed in the annular grooves.

[0014] By adopting the above technical solution, a spacer is installed on the valve core inside the valve body, which increases the wear resistance and durability, and the product service life can reach millions of working cycles.

[0015] Preferably, the coil body of the solenoid valve body is provided with a protective cover in the circumferential direction.

[0016] Preferably, the upper end of the cover body is provided with a plurality of inwardly recessed grooves.

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

[0018] The positioning plate uses four holes for positioning. The positioning plate is connected to the solenoid valve body by mounting bolts. Multiple angles can be adjusted to drive the upper cover body to rotate. When the wiring in the field remains unchanged, the angle can be adjusted to make the connecting pipe face the predetermined direction for reversing device, which is convenient and practical. Attached Figure Description

[0019] Fig. 1 This is a schematic diagram of the structure of an embodiment;

[0020] Fig. 2 This is a front view of an embodiment;

[0021] Fig. 3 This is a cross-sectional view along the BB direction in the embodiment.

[0022] In the diagram: 1. Top cover body; 2. Grounding bolt; 3. O-ring; 4. Explosion-proof coil holder; 5. Coil body; 6. Spacer; 7. Protective cover; 8. Groove; 9. Annular groove; 10. Heat sink; 11. Connecting pipe; 12. Positioning plate; 13. Mounting hole. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this embodiment of the utility model,

[0025] An explosion-proof solenoid valve, such as Figs. 1-3 As shown, the device includes a solenoid valve body, and an explosion-proof cover assembly is provided on the top of the solenoid valve body. The explosion-proof cover assembly includes a cover body 1. A positioning plate 12 in the circumferential direction is integrally connected to the lower end of the cover body 1. The positioning plate 12 is provided with a plurality of mounting holes 13. The positioning plate 12 is connected to the solenoid valve body by mounting bolts. A connecting pipe 11 is integrally connected to the side of the cover body 1.

[0026] The housing of the solenoid valve body can meet the explosion-proof rating in hazardous locations: Ex db IIC T6 Gb Ex tbIIIC T80℃ Db. Under these conditions, it contains components that may ignite an explosive gas atmosphere, can withstand the pressure generated by the explosion of the internal explosive mixture, and prevents the explosion from propagating to the explosive gas atmosphere around the housing.

[0027] A grounding bolt 2 is provided on the side of the solenoid valve body.

[0028] An O-ring 3 is provided on the side of the solenoid valve body facing the upper cover body 1.

[0029] The solenoid valve body includes an explosion-proof coil base 4, and heat dissipation strips 10 are provided on both sides of the explosion-proof coil base 4.

[0030] The valve core of the solenoid valve body has multiple inwardly recessed annular grooves 9 on its side, and a spacer 6 is installed in the annular grooves 9.

[0031] The coil body 5 of the solenoid valve body is provided with a protective cover 7 around its circumference.

[0032] The upper end of the cover body 1 is provided with a plurality of inwardly recessed grooves 8.

[0033] The coil body 5 operates with low power consumption, as low as 1W, and can be used in intrinsically safe environments, keeping its own current and voltage at very low levels for safe use.

[0034] Working principle:

[0035] The positioning plate 12 is positioned by four holes, and the positioning plate 12 is connected with the electromagnetic valve body by mounting bolts, and multiple angles can be adjusted to drive the upper cover body 1 to rotate, and when the field wiring is unchanged, the angle can be adjusted to make the connecting pipe 11 face the predetermined direction to reverse the device, which is convenient and practical.

[0036] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent substitutions or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. An explosion-proof solenoid valve, comprising a solenoid valve body, characterized in that: An explosion-proof cover assembly is provided above the solenoid valve body. The explosion-proof cover assembly includes a cover body (1). A positioning plate (12) in the circumferential direction is integrally connected to the lower end of the cover body (1). The positioning plate (12) is provided with multiple mounting holes (13). The positioning plate (12) is connected to the solenoid valve body by mounting bolts. A connecting pipe (11) is integrally connected to the side of the cover body (1).

2. The explosion-proof solenoid valve according to claim 1, characterized in that: A grounding bolt (2) is provided on the side of the solenoid valve body.

3. The explosion-proof solenoid valve according to claim 1, characterized in that: An O-ring (3) is provided on the side of the solenoid valve body facing the upper cover body (1).

4. The explosion-proof solenoid valve according to claim 1, characterized in that: The solenoid valve body includes an explosion-proof coil seat (4), and heat dissipation strips (10) are provided on both sides of the explosion-proof coil seat (4).

5. The explosion-proof solenoid valve according to claim 1, characterized in that: The valve core of the solenoid valve body is provided with a plurality of inwardly recessed annular grooves (9) on the side, and a spacer (6) is installed in the annular grooves (9).

6. The explosion-proof solenoid valve according to claim 1, characterized in that: The coil body (5) of the solenoid valve body is provided with a protective cover (7) around its circumference.

7. The explosion-proof solenoid valve according to claim 1, characterized in that: The upper end of the cover body (1) is provided with a plurality of inwardly recessed grooves (8).

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