TWM473602U - Explosion-proof solenoid valve - Google Patents

Description

Explosion-proof solenoid valve

This creation is about an explosion-proof solenoid valve, especially an explosion-proof solenoid valve with a gas-tight design to prevent the entry of flammable gases and to prevent explosions from affecting the external environment.

Solenoid valves are widely used in the field of application. The flow path of gas or liquid can be controlled by a solenoid valve. The solenoid valve is mainly used to set the solenoid valve at the passage of the flow pipe. When the solenoid valve is energized, the valve stem is lifted and lowered. To control the flow path on and off. This type of flow path control is very common and widely used, but for different characteristics of the fluid path, its safety must be considered.

The electromagnetic valve utilizes energization of the electromagnetic coil to cause the electromagnet to absorb and discharge the valve stem, thereby controlling the flow path to be turned on and off. Since the system uses electric power to switch, it may generate sparks when switching. If an external flammable gas (liquid) body penetrates into the electromagnetic valve, it may be ignited by a spark to cause an explosion. Therefore, the conventional explosion-proof solenoid valve usually A leak-stop ring is provided to prevent the flammable gas from infiltrating into the interior of the solenoid valve, such as the explosion-proof solenoid valve disclosed in Taiwan Patent Publication No. 405669 (see Fig. 5), but because the upper cover 20A is disc-shaped and bolted to the bolt The casing, once the flammable gas leaks into the solenoid valve due to aging of the leakage ring or other factors, the upper cover 20A may be separated from the casing 10A due to the explosion pressure, and the influence of the explosion is diffused to the outside of the solenoid valve. And spread to other areas, even causing more serious disasters.

Therefore, it is desirable that the explosion-proof solenoid valve has a structure that can limit the influence range of the explosion to the solenoid valve itself, and even if an explosion occurs, it does not affect the area or place other than the solenoid valve.

In view of this, the purpose of the present invention is to provide an explosion-proof electromagnetic valve, in addition to being able to prevent external gas and liquid from penetrating into the interior thereof, and also providing a neck that fits over the casing at the upper and lower covers when an explosion occurs. At this time, the pressure of the explosion pushes the neck so that the upper and lower covers can be more tightly coupled to the casing without falling off, so that the scope of the explosion can be limited to the solenoid valve itself and does not affect other places.

The main technical means for achieving the above purpose is that the explosion-proof solenoid valve comprises: a casing having a first opening and a second opening; an upper cover having an upper cover body and a first neck, the upper cover The first neck covers the first opening, the first neck protrudes from the upper cover body and is sleeved on the inner peripheral wall of the housing via the first opening; a first sealing member is disposed on the first neck and the shell Between the inner peripheral walls of the body; a lower cover having a lower cover body, a second neck portion and a center hole, the lower cover body covering the second opening, the second neck portion protruding from the lower cover body and sleeved on The inner peripheral wall of the casing is formed at a center of the lower cover body; a second sealing member is disposed on the second neck portion and an inner peripheral wall of the casing; a pipe body is disposed at the inner peripheral wall a central opening having a third opening facing the upper cover, the fourth opening being opposite to the third opening; a coil fixed in the housing and having a first opening a through hole, and is sleeved on the outer peripheral wall of the pipe body; a electromagnetic tube Bound via the third opening in the tubular body and disposed in the first through hole of the coil; and a valve stem movably disposed in the tube body of the coil by the electromagnetic drive pipe elevator.

The advantage of the present invention is that since the first neck portion is disposed on the upper cover and the second neck portion is disposed on the lower cover, the first neck portion and the second neck portion are sleeved on the inner peripheral wall of the casing, so that when the gas is flammable and liquid When leaking into the solenoid valve and being detonated, the pressure of the explosion will be pushed from the inner wall surfaces of the first neck and the second neck. a neck portion and a second neck portion push the outer peripheral wall of the first neck portion and the second neck portion against the inner peripheral wall of the housing, so that the upper cover and the lower cover are more tightly coupled to the housing, thereby limiting the extent of the explosion Inside the solenoid valve.

3‧‧‧Fixed buckle

5‧‧‧First seal

6‧‧‧Second seal

8‧‧‧Fixed buckle

9‧‧‧ Spring

10, 10A‧‧‧ shell

12‧‧‧ first opening

14‧‧‧second opening

16‧‧‧ trench

18‧‧‧ wiring hole

19‧‧‧ Cable gland

20, 20A‧‧‧ Cover

22‧‧‧Top cover body

24‧‧‧First neck

30‧‧‧Under the cover

32‧‧‧Under the cover body

34‧‧‧second neck

36‧‧‧Center hole

40‧‧‧ tube body

42‧‧‧ third opening

44‧‧‧fourth opening

50‧‧‧ coil

52‧‧‧First through hole

54‧‧‧Coil protective case

56‧‧‧ Nickel plated gasket

58‧‧‧ Nickel plated gasket

60‧‧‧Electromagnetic tube

62‧‧‧ Third neck

64‧‧‧ Stage

66‧‧‧ Groove

70‧‧‧ valve stem

72‧‧‧Front

80‧‧‧ fixed seat

82‧‧‧Expanding Department

90‧‧‧Ground connection gasket

92‧‧‧Power terminal block

94‧‧‧Grounding terminal block

95‧‧‧ Grounding terminal

100‧‧‧Explosion-proof solenoid valve

142‧‧‧Inside

144‧‧‧Internal section

200‧‧‧ pipe fittings

242‧‧‧ trench

342‧‧‧Outer protrusion

344‧‧‧ outer stage

542‧‧‧Second through hole

Figure 1 is a perspective view of the explosion-proof solenoid valve of the present invention.

Figure 2 is an exploded perspective view of the explosion-proof solenoid valve of the present invention.

Figure 3 is a cross-sectional view of the explosion-proof solenoid valve of the present invention.

Fig. 4 is a view showing the state of use of the explosion-proof electromagnetic valve of the present invention.

Figure 5 is a cross-sectional view of a conventional explosion-proof solenoid valve.

Referring to FIG. 1 and FIG. 2 , the explosion-proof solenoid valve 100 of the present invention mainly includes a casing 10 , an upper cover 20 , a lower cover 30 , a tubular body 40 , a coil 50 , an electromagnetic tube 60 , a valve stem 70 , and a valve body 70 . The holder 80 and a ground connection pad 90 are provided.

The housing 10 has a hollow cylindrical shape and has a first opening 12 and a second opening 14. The upper cover 20 has a disc-shaped upper cover body 22 and a hollow cylindrical first neck portion 24, and the first neck portion 24 projects from the upper cover body 22. The lower cover 30 has a disc-shaped lower cover body 32, a hollow cylindrical second neck portion 34, and a center hole 36. The second neck portion 34 protrudes from the lower cover body 32, and the center hole 36 is formed at the center of the lower cover body 32. The tubular body 40 has a hollow tubular shape and has a third opening 42 and a fourth opening 44.

Referring to FIG. 2 and FIG. 3 , the first neck portion 24 of the upper cover 20 is sleeved on the inner peripheral wall of the housing 10 via the first opening 12 , and a groove 242 is formed at the connection between the first neck portion 24 and the upper cover body 22 . A first sealing member 5 is disposed in the groove 242 and abuts against the inner peripheral wall of the casing 10 to form a sealed state of the upper cover 20 and the casing 10. The edge of the second neck portion 34 of the lower cover 30 forms an outer protrusion 342 from the second neck portion The outer peripheral wall of the projection 34 defines an outer step 344. Correspondingly, the inner peripheral wall at the second opening 14 of the housing 10 defines an inner protrusion 142 which projects inwardly from the inner peripheral wall of the housing 10. And forming an inner step 144, a second sealing member 6 is interposed between the outer step 344 and the inner step 144, and a groove 16 is formed in the inner peripheral wall of the housing 10, and the groove 16 is located at the second Above the edge of the outer protrusion 342 of the neck portion 34, a fixing buckle 8 is disposed in the groove 16 and above the edge of the outer protrusion portion 342, so as to cause a limit on the lower cover 30 to make the lower cover 30 The housing 10 is coupled to the housing 10, and the second sealing member 6 is crimped to the outer step portion 344 and the inner step portion 144, respectively, to form a sealed state of the housing 10 and the lower cover 30.

The tube body 40 is disposed in the central hole 36 of the lower cover 30. The third opening 42 is disposed toward the upper cover 20. The fourth opening 44 is disposed opposite to the third opening 42. The outer peripheral wall of the electromagnetic tube 60 forms a third neck portion 62. The third neck portion 62 is sleeved in the tubular body 40 via the third opening 42 of the tubular body 40, and a step 64 formed by the bottom of the third neck portion 62 abuts against the edge of the third opening 42 of the tubular body 40. The electromagnetic tube 60 is coupled to the tube 40. The center of the coil 50 forms a first through hole 52. The coil 50 is sleeved on the outer peripheral wall of the tube 40 and the electromagnetic tube 60 through the first through hole 52. The electromagnetic tube 60 is made of a magnetic conductive material, and the coil 50 passes current. After the excitation, the electromagnetic tube 60 generates magnetism, and the valve stem 70 to be described later is attracted to rise (as shown in FIG. 3). A coil protection shell 54 surrounds the coil 50 and has a second through hole 542. The two through holes 542 are sleeved on the outer peripheral wall of the electromagnetic tube 60 and fixed on the electromagnetic tube 60 by a fixing buckle 3 for protecting the coil 50. A nickel plating spacer 56 is disposed between the coil 50 and the coil protection cover 54. A nickel-plated spacer 58 is also provided between the coil 50 and the lower cover 30.

The valve stem 70 is movably disposed in the tubular body 40. The fixing member 80 is sleeved on the outer peripheral wall of the tubular body 40 and is welded to the lower cover body 32. The lower portion of the fixing member 80 is coupled to a tubular member 200. The fixing member 80 has an enlarged portion 82. A spring 9 is disposed in the enlarged portion 82. One end of the valve stem 70 defines a flange 72. The two ends of the spring 9 abut against the bottom of the flange 72 and the enlarged portion 82, respectively. Therefore, when the current is excited by the coil 50, the electromagnetic tube 60 generates magnetism to attract the valve stem 70 to rise, the flow path of the tubular member 200 is opened, and the fluid can flow through the tubular member 200, at which time the spring 9 is compressed, and when the supply of current to the coil 50 is stopped. Time, The magnetic force of the electromagnetic tube 60 disappears, and the valve stem 70 is lowered by the elastic force of the spring 9, and the flow path of the tubular member 200 is shut off as shown in FIG.

Since the coil 50 needs to be powered, a cable is connected to the coil 50. Referring to FIG. 1 again, the housing 10 forms a wiring hole 18 in the side wall, and the cable extends into the housing 10 via the wiring hole 18, and the cable sealing tube (cable gland) 19 is connected to the casing 10 via the wiring hole 18 and provides a sealing function to the cable passing through the wiring hole 18 to prevent the flammable liquid from penetrating into the casing 10 along the pipeline. Referring to FIGS. 3 and 4, a ground connection pad 90 is disposed in the housing 10. The ground connection pad 90 is provided with a power terminal block 92 and a ground terminal block 94. The cable passing through the connection hole 18 is connected to the setting. The power terminal on the power terminal block 94 is electrically connected to the coil 50, and a ground terminal 95 is disposed on the ground terminal block to provide a grounding function. A step portion 15 is formed in the housing 10, the ground connection pad 90 abuts against the step portion 15 and is located between the step portion 15 and the first neck portion 24 of the upper cover 20, and an E-shaped fixing buckle 7 is disposed on the electromagnetic portion. A recess 66 of the tube 60 is located above the ground connection pad 90, and has a limit fixing effect on the ground connection pad 90.

Since the upper cover 20 and the lower cover 30 of the explosion-proof solenoid valve 100 of the present invention are respectively provided with the first neck portion 24 and the second neck portion 34, the first neck portion 24 and the second neck portion 34 are sleeved in the casing 10 The peripheral wall, when the flammable gas and the liquid leak into the electromagnetic valve 100 and is detonated, the pressure of the explosion pushes the first neck portion 24 and the second neck from the inner wall surfaces of the first neck portion 24 and the second neck portion 34. The portion 34 pushes the outer peripheral wall of the first neck portion 24 and the second neck portion 34 against the inner peripheral wall of the casing 10, so that the upper cover 20 and the lower cover 30 are more tightly coupled to the casing 10, thereby limiting the extent of the explosion. Inside the solenoid valve 100.

The present invention is disclosed in the above embodiments, but it is not intended to limit the scope of the present invention. Anyone skilled in the art can make some changes and refinements without departing from the spirit of the present invention. The scope of protection is subject to the definition of the scope of the patent application attached.

3‧‧‧Fixed buckle

5‧‧‧First seal

6‧‧‧Second seal

8‧‧‧Fixed buckle

9‧‧‧ Spring

10‧‧‧shell

12‧‧‧ first opening

14‧‧‧second opening

16‧‧‧ trench

20‧‧‧Upper cover

22‧‧‧Top cover body

24‧‧‧First neck

32‧‧‧Under the cover body

34‧‧‧second neck

36‧‧‧Center hole

40‧‧‧ tube body

42‧‧‧ third opening

44‧‧‧fourth opening

50‧‧‧ coil

52‧‧‧First through hole

54‧‧‧Coil protective case

56‧‧‧ Nickel plated gasket

58‧‧‧ Nickel plated gasket

60‧‧‧Electromagnetic tube

62‧‧‧ Third neck

64‧‧‧ Stage

66‧‧‧ Groove

70‧‧‧ valve stem

72‧‧‧Front

80‧‧‧ fixed seat

82‧‧‧Expanding Department

90‧‧‧Ground connection gasket

92‧‧‧Power terminal block

94‧‧‧Grounding terminal block

95‧‧‧ Grounding terminal

100‧‧‧Explosion-proof solenoid valve

142‧‧‧Inside

144‧‧‧Internal section

200‧‧‧ pipe fittings

242‧‧‧ trench

342‧‧‧Outer protrusion

344‧‧‧ outer stage

542‧‧‧Second through hole

Claims (14)

An explosion-proof solenoid valve includes: a casing having a first opening and a second opening; an upper cover having an upper cover body and a first neck, the upper cover body covering the first opening, the first neck a portion protruding from the upper cover body and sleeved on the inner peripheral wall of the housing via the first opening; a first sealing member disposed between the first neck portion and an inner peripheral wall of the housing; and a lower cover having a cover body, a second neck portion, and a center hole covering the second opening, the second neck portion protruding from the lower cover body and sleeved on the inner peripheral wall of the housing, the center hole Formed in the center of the lower cover body; a second sealing member disposed on the second neck portion and the inner peripheral wall of the housing; a coil disposed in the housing; an electromagnetic tube disposed in the housing A magnetic force may be generated by excitation of a current through the coil; and a valve stem that is driven to move up and down by the coil. The explosion-proof solenoid valve of claim 1, further comprising a tube body extending through the central hole and having a third opening and a fourth opening facing the upper cover, the fourth opening Opposite to the third opening system, wherein the coil has a first through hole, the coil is sleeved on the outer peripheral wall of the tube body through the first through hole, and the electromagnetic tube is coupled to the tube via the third opening The body is disposed in the first through hole of the coil, and the valve stem is movably disposed in the tube body. The explosion-proof solenoid valve of claim 2, further comprising a fixing member sleeved on the tube body and connected to the lower cover body. The explosion-proof solenoid valve of claim 3, further comprising a spring abutting the fixing member and the valve stem, the fixing member having an enlarged portion, the spring being received in the enlarged portion, the valve stem One end forms a flange, and the spring is abutted against the flange. The explosion-proof solenoid valve according to any one of claims 1 to 4, further comprising a coil protection casing surrounding and covering the coil and having a second through hole, the coil protection casing passing through the second through hole sleeve Set on the electromagnetic tube. The explosion-proof solenoid valve according to any one of claims 1 to 4, further comprising a grounding connection pad disposed in the casing, wherein the casing forms a stepped portion, the grounding connection pad abutting The step is located between the step and the first neck of the upper cover, and an E-shaped retaining ring is disposed on a recess of the electromagnetic tube and above the ground connection pad. The explosion-proof solenoid valve of claim 6, further comprising a power terminal block and a ground terminal block, wherein the power terminal block and the ground terminal block are disposed on the ground connection pad, and the plurality of power terminals are disposed on the A power cable and the coil are electrically connected to the power terminal block, and a ground terminal is disposed on the ground terminal block. The explosion-proof solenoid valve of claim 1, wherein a wiring hole is formed in the housing, and a cable sealing tube is disposed on the wiring hole for the pipeline inside the housing to pass. The explosion-proof solenoid valve according to any one of claims 1 to 4, wherein an inner protrusion is formed at the second opening of the inner peripheral wall of the casing, the inner protrusion being inward from an inner peripheral wall of the casing Protruding and forming an inner step, an outer protrusion is formed at an edge of the second neck of the lower cover, the outer protrusion protruding from the outer peripheral wall of the second neck and forming an outer step, the outer The step portion is coupled to the inner step to bond the lower cover to the housing. The explosion-proof solenoid valve of claim 9, wherein the second sealing member is disposed between the outer step portion and the inner step portion. The explosion-proof solenoid valve of claim 9, wherein the inner peripheral wall of the housing forms a groove, and a fixing buckle is disposed in the groove and located above the edge of the outer protrusion and abuts against the protrusion The edge of the ministry. The explosion-proof solenoid valve of claim 1, wherein the first seal is an O-ring. The explosion-proof solenoid valve of claim 1, wherein the second seal is an O-ring. The explosion-proof solenoid valve according to any one of claims 2 to 4, wherein the electromagnetic tube has a third neck portion, and the third neck portion is sleeved on the inner peripheral wall of the tube body via the third opening.