KR101611094B1 - Fluid shutoff valves has leakage prevention function - Google Patents

Abstract

The present invention relates to a fluid shutoff valve having a leakage prevention function, and more specifically, to a fluid shut-off valve having a leakage preventing function to completely block the leakage of fluid regardless of whether the fluid shut-off valve performs an opening/closing operation or an assembly error occurs. The fluid shutoff valve comprises a connection pipe and a solenoid switch. The connection pipe has a fluid inlet formed on one internal side and a fluid outlet formed on an internal side opposed to the said side and has a coupling part formed between the fluid inlet and the fluid outlet to vertically pass therethrough. The solenoid switch is coupled through the coupling part of the connection pipe to open and close the flow of fluid and comprises an upper coupled body and a lower coupled body. The upper coupled body comprises: a coil body formed at the internal center of a housing; a movement path formed at the internal center of the coil body; a magnetic body formed on the lower part of the movement path; a sealing member formed on the upper surface of the magnetic body; a slider coupled to the magnetic body through the sealing member; and a solenoid plunger formed on the upper part of the slider. The lower coupled body includes a fluid opening and closing member. An upper elastic body is formed between the bottom surface of the upper end of the slider and the upper surface of the sealing member such that the sealing member always firmly and elastically supports the magnetic body to maintain an airtight condition while the slider is moved upward and downward, thereby preventing leakage of the fluid.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fluid shut-

The present invention relates to a fluid shut-off valve, and more particularly, to a fluid shut-off valve having a leakage preventing function that completely blocks fluid leakage regardless of whether an opening error of the fluid shut-off valve or an assembly error of a solenoid plunger and a slider will be.

Generally, when using highly explosive fluids such as boiler fuel, gas-fired burner, boiler, gas range, gas oven range, etc., the combustion condition to the front of the product is abnormal An emergency shut-off valve (emergency shut-off valve) is provided to stop the flow of fluid to prevent further accidents due to fluid leakage.

Such a fluid shut-off valve is automatically operated by a signal transmitted by a gas detector or a fire alarm, thereby cutting off the supply of fluid. A solenoid switch method is mainly used so that it can be operated by the corresponding signal.

The fluid shut-off valve uses a magnetic field generated in the cylinder by energizing a coil or a structure on a hollow cylindrical structure formed by winding a solenoid (1) wire in a coil at a pitch at the time of a power failure. (2) And the coil is energized by direct current or alternating current so that the movable core is forced to be sucked into the center of the coil. As an electro-mechanical converter, there are a relay contact and an electromagnetic valve The slider and the opening / closing member interlocked with the slider shut off or shut off the supply of fluid to / from the connection pipe.

In this case, a solenoid plunger, which is a switch for manually operating the fluid shut-off valve, is provided so that a product such as a gas boiler, a gas range, a gas oven range,

In other words, the user can push or pull the solenoid plunger for manual operation to lower or push down the plunger, thereby continuously performing or blocking the flow of the fluid flowing through the fluid inflow path.

The operation plunger is also used for testing whether the operation plunger is normally operated or not, and also serves to operate a separate switch unit provided to check whether the fluid supply is actually shut off. That is, the switch unit is provided with the switch unit on the upper side of the operation plunger and is pressed or released by the operation plunger that ascends and descends, thereby confirming whether or not the switch unit is operated.

However, in the conventional fluid shut-off valve as described above, when the solenoid plunger for opening and closing the flow of the fluid moves up and down, perfect airtightness can not be maintained at the engagement portion of the slider interlocked with the operation of the solenoid plunger, .

In addition, there is a problem that the peripheral portion is damaged by the frictional force applied to the side surface of the slider in accordance with the repeated upward and downward movements of the slider, so that a gap is generated and the fluid may leak.

In particular, since the assembly tolerance of the slider and the solenoid plunger constituting the solenoid switch can not be completely absorbed, leakage of the fluid entering and exiting the connection pipe can not be completely prevented.

Published patent application No. 10-2011-0050927

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a solenoid valve which can reliably maintain a tight airtightness regardless of whether the solenoid switch is opened or closed or a gap is created due to an assembly error of each component including a solenoid plunger and a slider Thereby preventing leakage of the fluid to prevent a safety accident.

According to an aspect of the present invention, there is provided a fluid shut-off valve comprising: a fluid inflow path formed on one side of a fluid shutoff valve; a fluid outflow path formed on an opposite side of the fluid inflow path; A coupling tube having a penetrating coupling portion; A coupling member which is coupled through the coupling portion of the coupling pipe to open or close the fluid flow, a coil formed as an inner center of the housing, a moving path formed as an inner center of the coil and a magnetic body formed as a lower portion of the moving path, A solenoid switch including a sealing member formed on an upper surface of the magnetic body, an upper coupling body including a slider coupled with the magnetic body and a sealing member, and a solenoid plunger formed on an upper portion of the slider, and a lower coupling member including a fluid opening and closing member; And an upper elastic body is formed between the upper bottom surface of the slider and the upper surface of the closure member so that the closure member elastically supports the magnetic body at all times to maintain the airtightness even during the upward and downward movement of the slider, .

The sealing member is formed on the upper surface with a telescopic groove having a trapezoidal cross section that smoothly expands and contracts inward and outward in the circumferential direction to improve airtightness.

The solenoid plunger is formed with a coupling groove for receiving and supporting the slider and the sealing member in a lower inner side.

The fluid opening / closing member moves upward due to the elastic supporting force of the lower elastic body during the lifting operation of the solenoid plunger to close the fluid opening / closing hole of the connecting pipe to block fluid movement.

As described above, according to the present invention, the sealing member always elastically supports the magnetic body through the elastic body provided between the upper and lower surfaces of the slider and the upper surface of the closure member, so that during the opening and closing operation of the solenoid switch, The leakage of the fluid generated between the outer circumferential surface of the solenoid plunger and the slider is prevented, thereby preventing a safety accident. Also, the solenoid switch can be improved in operability by eliminating the resistance due to leakage of the fluid, .

In addition, according to the present invention, since the slider is always elastically supported in the upward direction by the upper and lower elastic members and the sealing member is always elastically supported in the downward direction by the upper elastic member, the assembly error of the slider and the solenoid plunger is absorbed, It is possible to completely block the leakage of the gas.

FIG. 1 is a schematic view illustrating a decomposition state of a fluid shutoff valve having a leakage preventing function according to a preferred embodiment of the present invention.
Fig. 2 is a view showing a state shown in the upper part of Fig. 1 as a coupled state.
Fig. 3 is a view showing a state shown in the lower part of Fig. 1 as a coupled state.
Fig. 4 is a view showing the state in which the recessed portion in Fig. 2 is separated. Fig.
FIG. 5 is a view illustrating a state in which a plunger of a solenoid switch of a fluid shutoff valve having a leakage prevention function is lowered according to a preferred embodiment of the present invention.
FIG. 6 is a view showing an operation state in which a plunger of a solenoid switch of a fluid shut-off valve having a leakage preventing function according to a preferred embodiment of the present invention is lifted and lowered.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a fluid shutoff valve having a leakage preventing function according to the present invention will be described in more detail with reference to the accompanying drawings.

Hereinafter, elements having the same function in all the following drawings will be denoted by the same reference numerals, and repetitive description will be omitted. Further, the following terms are defined in consideration of functions in the present invention, Should be interpreted as.

As shown in FIGS. 1 to 6, the fluid shutoff valve 1000 according to the present invention includes a connection pipe 100 and a solenoid switch 200.

The connection pipe 100 is connected to a pipe (not shown) through which a fluid flows, a fluid inflow path 110 is formed on one side of the connection pipe 100, and a fluid outflow path 120 is formed on one side of the opposite side opposite And the fluid outflow path 120 is provided with partition walls 111 and 121 and between the partition walls 111 and 121 a fluid flow An opening / closing hole 140 is formed.

In addition, an engaging portion 130 penetrating upward and downward is formed in an intermediate portion of the upper surface of the coupling tube 100 and an intermediate portion of the lower surface of the coupling tube 100.

The coupling part 130 includes an upper coupling part 131 positioned on the outer circumferential upper surface of the coupling tube 100 and a lower coupling part 132 positioned on the lower surface.

An upper coupling groove 131a is formed at the upper center of the upper coupling portion 131 and an air tightness is formed on the outer side of the coupling groove 131a when the upper coupling portion 210 of the solenoid switch 200, An O-ring receiving groove 131b is formed to receive the O-ring (OR) for preventing leakage of the fluid at the coupling portion.

The lower engaging portion 132 is formed with a lower engaging groove 132a at the center of the bottom and a female screw 132b for engaging with the lower engaging body 220 of the solenoid switch 200 is formed on the inner surface of the engaging groove 132a. Is formed.

The lower end of the lower coupling part 132 is hermetically coupled with the lower coupling part 220 of the solenoid switch 200 to receive an O-ring (OR) An O-ring receiving groove 132c is formed.

The solenoid switch 200 is coupled through the coupling part 130 of the coupling pipe 100 to open or close the fluid flow opening and closing hole 140 to control the flow of the fluid.

The solenoid switch 200 includes an upper coupling unit 210 coupled to the upper coupling unit 131 of the coupling pipe 100 and a lower coupling unit 220 coupled to the lower coupling unit 132.

In addition, the upper assembly 210 is a box-shaped portion that surrounds all mechanical devices such as a housing or a frame in which a mechanism is housed, in which a moving passage 213 is formed at an inner central portion. A coin body 212 made of a wound coil having a cylindrical shape and provided on the outer side of the moving path 213 and a magnetic material formed on the lower side of the moving path 213, The magnetic substance 214 is formed on the upper surface of the magnetic body 214 and blocks the leakage of the fluid. The magnetic substance 214 has a coupling hole 214a at the center of the coupling hole 214a. An elastic body support member 216 formed on the upper surface of the sealing member 215 and having an upper elastic body 218 and having a through hole 216a formed at a central portion of the elastic body support member 215, , The above magnetic A slider 217 coupled with the engagement holes 214a and 215a of the body 214 and the sealing member 215 and moving upward and downward and the slider 217 formed above the slider 217, And a solenoid plunger 219 movable up and down with an engaging groove 219a for receiving and supporting the closure member 215. As shown in FIG.

Here, between the bottom surface of the magnetic body 214 and the upper surface of the magnetic body 214 and the bottom surface of the closure member 215, a nitrile rubber or other suitable material for preventing fluid from leaking, An O ring, which is a seal ring seal, is formed.

Further, it is preferable that the sealing member 215 is also made of a rubber material having airtightness so that fluid does not leak with elastic force.

The upper elastic body 218 is formed between the upper surface of the sealing member 215 and the upper and lower surfaces of the slider 217 to elastically support the sealing member 215 and the slider 217.

That is, the upper elastic body 218 elastically supports the upper surface of the sealing member 215 and the lower surface of the slider 217.

Since the sealing member 215 and the slider 217 can be elastically supported by the upper elastic body 218 as described above, even if an assembly error occurs between the sealing member 215 and the slider 217, It is possible to completely perform the function of sealing the upper side of the magnetic body 214.

In addition, the sealing member 215 is formed with an elongated groove 215b having a substantially trapezoidal cross-section so as to smoothly expand and contract inward and outward in the circumferential direction on the upper surface.

Since the sealing member 215 is provided with a stretching force in the circumferential direction inside and outside by the expansion and contraction groove 215b, the gap between the outer circumferential surface of the slider 217 and the inner surface of the engagement hole 215a of the sealing member 215 is tight So that the airtightness is remarkably improved as compared with the prior art.

The inner circumferential surface of the sealing member 215 is resiliently supported inward by the expansion and contraction groove 215b so that the inner surface of the engagement hole 215a is closely contacted with the outer circumferential surface of the slider 217 So that a more tight airtight state is obtained than in the prior art.

An engaging groove 219a for receiving and supporting the slider 217 is formed inside the lower portion of the solenoid plunger 219.

The engaging groove 219a firmly receives and supports the slider 217 without shaking to help the slider 217 move upward and down smoothly and smoothly.

The lower coupling member 220 is formed in a cap shape and includes a female screw 132b formed in the coupling groove 132a of the lower coupling portion 132 and a male screw 221 for coupling therewith, An engaging groove 222 is formed.

The lower elastic body 223 having an elastic supporting force and the fluid opening / closing member 224 are coupled to the coupling groove 222.

The lower end of the slider 217 is supported on the upper surface of the fluid opening and closing member 224 and the lower surface of the slider 217 is formed on the lower surface of the fluid opening and closing member 224 to receive the lower elastic member 223.

The fluid opening / closing member 224 is elastically supported to the upper side by the elastic force of the lower elastic body 223.

The upper surface of the fluid opening / closing member 224 and the lower end of the slider 217 are configured to be in intimate contact with each other. However, if necessary, a female screw and a male screw may be formed and tightly coupled.

When the solenoid plunger 219 is moved up and down by the resilient supporting force of the lower elastic member 223, the fluid opening / closing member 224 moves upward to open the fluid opening / closing hole 140 of the connecting pipe 100 So that the movement of the fluid is blocked.

The gap between the outer peripheral surface of the slider 217 and the inner surface of the closure member 215 and between the magnetic member 214 and the closure member 215 are firmly fixed to each other when the slider 217 is moved up and down, So that all the internal gaps including the joining portion of the upper joint 210 are completely blocked, so that leakage of the fluid is prevented.

When the solenoid plunger 219 is moved downward, the slider 217 is lowered along the moving path 213 while the fluid opening / closing member 224 moves downward, The fluid opening / closing hole 140 is opened to facilitate fluid movement.

At this time, even if the slider 217 moves up and down along the moving path 213, the sealing member 215, which is always elastically supported by the upper elastic body 218, Tightness between the inner surface of the engaging hole 215a of the magnetic body 215 and the inner surface of the engaging hole 215a of the engaging hole 215, and is closely contacted with the magnetic body 214.

More specifically, the present invention is characterized in that the sealing member 215 is disposed between the upper bottom surface of the slider 217 and the upper surface of the sealing member 215 through the upper elastic body 218, which is installed through the elastic body supporting member 216, (214) is always firmly resiliently supported.

Accordingly, leakage of fluid generated between the inner circumferential surface of the magnetic body 214 and the outer circumferential surface of the slider 217 during the opening and closing operation of the solenoid switch 200 can be completely blocked.

By blocking the leakage of the fluid as described above, the resistance of the solenoid plunger 219 and the slider 217 that interfere with the rising and falling of the solenoid plunger 219 can be eliminated, thereby improving the operability of the solenoid switch 200.

In the present invention, the slider 217 is always elastically supported in the upward direction by the upper elastic body 218 and the lower elastic body 223, and the sealing member 215 is always held in the downward direction by the upper elastic body 218 And is elastically supported.

Accordingly, the assembly error of the slider 217 and the solenoid plunger 219 can be absorbed, so that leakage of the fluid due to the assembly error can be completely blocked.

The operation state of the present invention having the above-described structure will now be described.

First, when the fluid shutoff valve 1000 according to the present invention closes the flow of the fluid, a signal is sent from the gas leak detector or the smoke alarm to the solenoid switch 200.

Accordingly, current is applied to the solenoid switch 200 by an external power source or a battery. Then, the magnetic body 214 and the coil 212 interact with each other to generate a magnetic force to raise the solenoid plunger 219 .

At the same time, the fluid elastic member 224 and the slider 217 are lifted by the elastic force of the lower elastic member 223 in conjunction with the upward movement of the solenoid plunger 219.

Subsequently, the fluid opening / closing member 224 moves upward to close the fluid opening / closing hole 140 of the coupling pipe 100 to block fluid movement.

At this time, the upper bottom surface of the slider 217 and the upper surface of the sealing member 215 are supported by the expansion elastic force of the upper elastic body 218.

Therefore, even when the slider 217 moves upward and downward along the moving path 213, the sealing member 215, which is always elastically supported by the upper elastic body 218, is pressed against the outer peripheral surface of the slider 217, Tightness between the inner surface of the engaging hole 215a of the magnetic body 215 and the inner surface of the engaging hole 215a of the engaging hole 215, and is closely contacted with the magnetic body 214.

On the contrary, when the solenoid switch 200 opens the flow of the fluid, when the external power applied to the solenoid switch 200 or the current due to the battery is released as shown in FIG. 5, The solenoid plunger 219 is lowered due to the absence of magnetism generated by mutual action of the solenoid plunger 219.

The upper elastic body 218 elastically supports the upper surface of the sealing member 215 by pressing the upper elastic body 218 while the slider 217 is lowered.

At the same time, the fluid opening / closing member 224 of the lower coupling member 220 is lowered in conjunction with the lowering motion of the slider 217.

Accordingly, the fluid opening / closing member 224 moves downward to open the fluid opening / closing hole 140 formed in the coupling pipe 100 to smoothly flow the fluid.

At this time, the lower elastic body 223 is compressively and elastically supported by the fluid opening and closing member 224.

Meanwhile, in the present invention, when the solenoid switch 200 opens the flow of the fluid, the solenoid plunger 219 descends. However, when the solenoid switch 200 closes the flow of the fluid, The solenoid plunger 219 may be configured to operate in a downward direction.

Therefore, even when the slider 217 moves up and down along the moving path 213 as described above, the sealing member 215, which is always elastically supported by the upper elastic body 218, Tightness between the inner surface of the coupling hole 215a of the sealing member 215 and the magnetic body 214 can be tightly adhered to each other, thereby improving the airtightness and preventing leakage of the fluid, .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. And will be apparent to those skilled in the art to which the invention pertains.

100: connector tube 110: fluid inlet path
111: partition wall 120: fluid outflow path
130: engaging portion 131: upper engaging portion
131a: engagement hole 131b: O-ring receiving groove
132: lower coupling portion 132a: lower coupling groove
132b: Female thread 132c: O-ring housing groove
140: Fluid opening / closing hole 200: Solenoid switch
210: upper assembly 211: housing
212: Coil 213: Moving path
214: magnetic body 215: sealing member
215a: Coupling hole 215b: O-ring receiving groove
216: elastic body receiving member 217:
218: upper elastic member 219: solenoid plunger
219a: coupling groove 220:
221: male screw 222: coupling groove
223: lower elastic member 224: fluid opening / closing member
224a: Elastic body receiving groove 1000: Fluid shut-off valve

Claims (4)

As a fluid shutoff valve,
A connection pipe having a fluid inflow path formed on an inner side thereof and a fluid outflow path formed on an opposite side of the fluid inflow path, the connection pipe having an upper portion and a lower portion formed between the fluid inflow path and the fluid outflow path;
A coupling member which is coupled through the coupling portion of the coupling pipe to open or close the fluid flow, a coil formed as an inner center of the housing, a moving path formed as an inner center of the coil and a magnetic body formed as a lower portion of the moving path, A solenoid switch including a sealing member formed on an upper surface of the magnetic body, an upper coupling body including a slider coupled with the magnetic body and a sealing member, and a solenoid plunger formed on an upper portion of the slider, and a lower coupling member including a fluid opening and closing member; Respectively,
A top elastic body is formed between the upper and lower surfaces of the slider and the upper surface of the closure member so that the closure member elastically supports the magnetic body at all times to maintain airtightness even when the slider moves up and down to prevent leakage of the fluid Lt; / RTI > The method according to claim 1,
Wherein the sealing member is formed with an elongated groove having a trapezoidal section in cross section which improves the airtightness by smoothly expanding and contracting inward and outward in the circumferential direction on the upper surface. The method according to claim 1,
Wherein the solenoid plunger has a coupling groove for receiving and supporting the slider and the closure member inside the lower portion. The method according to claim 1,
Wherein the fluid opening / closing member moves upward in response to the elastic supporting force of the lower elastic body during the lifting operation of the solenoid plunger to close the fluid opening / closing hole of the connecting pipe to block the movement of the fluid.

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