JP2009222233A - Valve for portable fuel cylinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve for a portable fuel cylinder can prevent reduction in safety and reliability caused by refilling of a disposable portable fuel cylinder. <P>SOLUTION: This valve for the portable fuel cylinder includes a stem 110, an external cylinder 130 joined to the stem and forming a first fixing projection on an inner peripheral surface, an internal cylinder forming a through-hole in the center, mutually separately forming a plurality of second fixing projections in the longitudinal direction on an outer peripheral surface, having a check valve 140 on the lower end and inserted inside the external cylinder 130, a spring 160 arranged so as to surround the outer peripheral surface of the external cylinder 130 and generating restoring force so as to restore a position of the stem, and a housing 170 connected with an extension pipe part communicating with the inside of a gas cylinder, internally provided with the stem 110, the external cylinder 130, the internal cylinder 150 and the spring 160 and forming a locking projection on the inner peripheral surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable fuel cylinder valve, and more particularly to a disposable portable fuel cylinder valve that is filled with liquefied petroleum gas after production of the product.

  FIG. 1 is a perspective view showing a conventional portable fuel cylinder, and FIG. 2 is a cross-sectional view showing the valve of FIG. Portable fuel cylinders are widely used for camping stoves, lanterns, torches, and the like. Here, liquefied petroleum gas (LPG) means a liquid compressed at room temperature. As shown in FIG. 1, a portable fuel cylinder generally has a cylindrical body 20 and a valve 10 through which gas flows in / out. A sealed container that stores liquefied petroleum gas.

  Further, as shown in the sectional view of FIG. 2, a conventionally used portable fuel cylinder valve 10 includes a stem 11, a stem gasket 14, a mountain cup 15, a spring 16, a housing internal rib 17, a housing 18, and the like. Is done.

  First, a gas inlet / outlet port 12 through which gas flows in / out is vertically formed in the stem 11, and is provided with an orifice 13 formed on the outer peripheral surface so as to communicate with the gas inlet / outlet 12. A disc-shaped part that opens and closes. In addition, the stem 11 plays a role of fixing so as not to come out upward after being inserted into the groove of the mountain cup 15 and a role of coupling to the cylindrical body 20, and the spring 16 is a lower outer periphery of the stem 11. It is fixed to the housing internal rib 17 while surrounding the surface.

  The housing 18 is connected to the flow pipe 19 at the lower end, and the stem 11, the stem gasket 14, the housing inner rib 17, and the spring 16 are coupled to each other and fixed to a coupling groove formed in the mountain cup 15.

  Here, the operation principle of the conventional valve will be described as follows.

  In order to open the valve 10, first, when pressure is transmitted to the lower portion of the stem 11, the position of the stem gasket 14 and the orifice 13 that have blocked the orifice 13 is shifted, and the filled gas flows into the inside of the outer cylinder 18. It goes out to the gas inlet / outlet 12 through the orifice 13 through the passage. On the contrary, in order to close the valve 10, it is only necessary to release the pressure applied to the stem 11, the spring 16 returns the stem 11 to the original position by the restoring force, and the stem gasket 14 closes the orifice 13. Prevent gas leaks.

  However, such a structure of the conventional valve 10 transmits pressure to the lower portion of the stem 11 in the same manner as when the valve 10 is opened, so that the positions of the stem gasket 14 and the orifice 13 that have blocked the orifice 13 are shifted. However, it has the duality that gas can be easily filled into the portable fuel cylinder through this open space.

  Since such an operation continues until the restoring force of the spring is lost, the portable fuel cylinder using the conventional valve is very easy to refill the gas. However, if the gas is refilled indiscriminately in this way, the function of the valve stem gasket and spring will be reduced, gas leakage from the portable fuel cylinder will occur, and the functional life of the portable fuel cylinder will be reduced. If it is used repeatedly ignoring safety, there is a problem that the risk of accidents is high.

  The present invention is intended to solve the above-described problems, and provides a portable fuel cylinder valve that can prevent a decrease in safety and reliability due to refilling of a disposable portable fuel cylinder. Objective.

  The present invention includes a stem, an outer cylinder coupled to the stem and having a first fixing protrusion formed on an inner peripheral surface, a through hole formed in the center, and a plurality of second fixings along the longitudinal direction on the outer peripheral surface. Protrusions are formed spaced apart from each other, provided with a check valve at the lower end, and disposed so as to surround the inner cylinder inserted into the outer cylinder and the outer peripheral surface of the outer cylinder so as to restore the position of the stem. A spring for generating a restoring force and an extension pipe portion communicating with the inside of the gas cylinder are connected, and the stem, the outer cylinder, the inner cylinder and the spring are arranged inside, and a locking projection is formed on the inner peripheral surface And a housing for the portable fuel cylinder. At this time, if the outer cylinder is lowered by the lowering of the stem, the first fixing protrusion pushes at least one of the plurality of second fixing protrusions to lower the inner cylinder. In addition, when the outer cylinder is raised, at least one of the plurality of second fixing protrusions is locked to the locking protrusion, and the rising of the inner cylinder is restricted.

  In the present invention, the first fixing protrusions are formed to be inclined downward, and the plurality of second fixing protrusions are formed to be inclined upward. At this time, the locking protrusions are formed in a horizontal direction, and at least one of the plurality of second fixing protrusions or the locking protrusions is formed of a flexible material. The spring is disposed between the locking projection and the stem, and provides a restoring force to raise the stem when the stem is lowered.

  In the present invention, the stem is formed with a gas inlet / outlet through which gas flows in / out. The stem may include an orifice formed on an outer peripheral surface so as to communicate with the gas inlet / outlet. The portable fuel cylinder valve may further include a stem gasket for opening and closing the orifice, and a mountain cup having a central portion coupled to the upper portion of the housing and an outer peripheral surface coupled to the gas cylinder.

  In the present invention, the check valve may include a backflow prevention piece formed on the upper surface of the valve disk in order to prevent backflow.

  In the present invention, the first fixed protrusions are formed along an inner peripheral surface of the outer cylinder, and the plurality of second fixed protrusions are formed along an outer peripheral surface of the inner cylinder, The protrusion is formed along the inner peripheral surface of the housing.

  The portable fuel cylinder valve according to the present invention has the following effects.

  First, because the filled portable fuel cylinder cannot be refilled after being used once because of this valve, it is possible to prevent sales loss by refilling and to ensure safety and reliability.

  Secondly, since it can be sold with a standard like an existing product, no auxiliary equipment (adapter) is required, and it can be produced on an existing production line.

  Thirdly, the number of repetitions of the vertical movement for completing the valve can be adjusted by the number of the second fixing protrusions of the inner cylinder.

  Fourth, it has the effect of minimizing the left / right movement of the stem by fixing the outer cylinder.

It is a perspective view showing the conventional portable fuel cylinder. It is sectional drawing showing the valve | bulb of FIG. It is a disassembled perspective view showing the valve by embodiment of this invention. It is sectional drawing of the valve shown in FIG. It is sectional drawing of the valve shown in FIG. It is sectional drawing of the valve shown in FIG. It is sectional drawing of the valve shown in FIG. It is sectional drawing of the valve shown in FIG. It is sectional drawing of the valve shown in FIG. It is a partial expanded sectional view of B shown in FIG. It is a partial expanded sectional view of B shown in FIG.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in the specification and claims should not be construed to be limited to ordinary or lexicographic meanings, and the inventor shall best understand his invention. Therefore, it should be construed to have a meaning and concept consistent with the technical idea of the present invention based on the principle that the term concept can be appropriately defined.

  Therefore, the configuration described in the embodiments and drawings described in the present specification is only the most desirable embodiment of the present invention, and does not represent all the technical ideas of the present invention. It should be understood that there can be various equivalents and variations that can be substituted for these.

  FIG. 3 is an exploded perspective view showing a portable fuel cylinder valve 100 according to an embodiment of the present invention, and FIG. 4 is a sectional view of the valve shown in FIG. Referring to FIGS. 3 and 4, the valve 100 includes an inner cylinder 150, a spring 160, a housing 170 and a mountain cup 180.

  First, the stem 110 means a cylindrical member having a gas inlet / outlet port 111 through which gas flows in / out and is formed vertically, and has an orifice 112 formed on the outer peripheral surface so as to communicate with the gas inlet / outlet port 111. Refers to a disk-shaped member that opens and closes the orifice 112.

  The outer cylinder 130 is a cylindrical member in which one end of the stem 110 is inserted and a first fixing protrusion 131 is formed along the inner peripheral surface. The inner cylinder 150 has a through hole 151 formed in the center, a plurality of second fixing protrusions 152 formed along the outer peripheral surface, a check valve 140 at the lower end, and a cylindrical shape inserted into the outer cylinder 130. Say the member. The first fixed protrusion 131 is inclined downward. The second fixing protrusions 152 are spaced apart from each other along the longitudinal direction of the inner cylinder 150 and are inclined upward.

  Unlike the prior art, in the present invention, the outer cylinder 130 is provided, and the effect of minimizing the left-right movement of the stem 110 that causes gas leakage occurs.

  The spring 160 is provided so as to surround the outer peripheral surface of the outer cylinder 130. The housing 170 is connected at its lower end to an extension pipe portion 171 communicating with the inside of a gas cylinder (not shown), the stem 110, the outer cylinder 130, the inner cylinder 150 and the spring 160 are coupled to each other, and the mountain cup 180 is The central portion is coupled to the upper portion of the housing 170, and the outer peripheral surface is coupled to the gas cylinder. A locking projection 132 is formed along the inner peripheral surface of the housing 170. The locking protrusion 132 has a structure protruding in the horizontal direction.

  The spring 160 is disposed between the locking protrusion 132 and the stem 110. When the stem 110 is lowered, the spring 160 applies a restoring force so as to raise the stem 110.

  The first fixing protrusion 131 and the second fixing protrusion 152 are made of steel, and the locking protrusion 132 is made of a flexible material. However, the present invention is not limited to this, and the fixing protrusion 152 may be formed of a flexible material, and the locking protrusion 132 may be formed of a steel material.

  Hereinafter, the filling method and operating principle of a valve which cannot be refilled according to the present invention will be described. 5 to 9 are sectional views of the valve shown in FIG.

  First, as shown in the partially enlarged view of FIG. 5, when the stem 110 is pushed, the stem 110, the spring 160, and the outer cylinder 130 move to the lower end.

  At this time, it is desirable to adjust the distance between the first fixing protrusion 131 and the locking protrusion 132 and the second fixing protrusion 152 so that the distance between the first fixing protrusion 131 and the locking protrusion 132 decreases by about 2 to 2.3 mm each time the stem 110 is pressed once. 130 first fixing protrusions 131 transmit kinetic energy downward to the second fixing protrusions 152 of the inner cylinder 150.

  By adjusting the number of the second fixing protrusions 152, it is possible to adjust the number of repetitions of the vertical movement for completing the valve.

  When the pressed stem 110 is released, the restoring force of the spring 160 causes the stem 110 to move upward, thereby causing the outer cylinder 130 to move up at the same time, but the inner cylinder 150 has a locking protrusion formed inside the outer cylinder 130. It is locked by 132 and stops without moving to the upper end.

  Further, when the gas is filled when the inner cylinder 150 is lowered to the middle without being completely lowered, the gas can be filled into the gas cylinder as shown by a dotted line in FIG.

  If the step of pushing the stem 110 is repeated in this manner, as shown in FIG. 7, the internal cylinder 150 eventually reaches the lower end inlet of the valve 100 and closes the gas passage to be fixed.

  Then, as shown by the dotted line in FIG. 8, if the inner cylinder 150 reaches the lower end inlet of the valve 100 and is fixed by closing the gas passage, the gas cylinder 111 is further in contact with the inner cylinder 150. In addition, no further filling is possible.

  On the other hand, when the portable fuel cylinder is used for combustion, as shown by a dotted line in FIG. 9, the check valve 140 and the through-hole 151, the orifice 112, and the gas inlet / outlet port 111 attached to the lower part of the inner cylinder that is not outside the inner cylinder 150. The combustion gas flows through.

  10 and 11 are partially enlarged cross-sectional views of B shown in FIG. As shown in FIGS. 10 and 11, the check valve 140 includes a valve disc 141 and a valve gasket 142. As shown by the dotted line in FIG. 10, when the stem 110 is pushed by such a check valve 140, the combustion gas is easily released through the check valve 140, the through hole 151, the orifice 112, and the gas inlet / outlet port 111. As shown by the dotted line in FIG. 11, the valve gasket 142 makes it impossible to fill the combustion gas.

  As shown in FIGS. 10 and 11, the check valve 140 has a backflow prevention piece 142 formed on the upper surface of the valve disk 141 in order to prevent a backflow caused by a gas flow.

  In addition, the automatic inspection equipment for conventional portable fuel cylinders is complete assembly of valves, spring double joint assembly inspection, vacuum, vacuum pressure inspection, liquefied petroleum gas filling, temperature chamber leak inspection, automatic press machine, shipping Inspection proceeds in order.

  Since the non-refillable valve according to the present invention can be sold in the same standard as the existing product, no auxiliary device (adapter) is required, and the existing automated inspection equipment line, that is, the complete assembly of the valve is completed, the spring The inspection can proceed in the order of double bond assembly inspection, vacuum, vacuum pressure inspection, liquefied petroleum gas filling, thermostatic tank leak inspection, automatic pressing machine, shipping, etc., and automatic inspection is possible without new inspection equipment There are advantages.

  The present invention has been described with reference to the embodiments and the drawings. However, the present invention is not limited thereto, and those skilled in the art will understand the technical idea of the present invention and the equivalent scope of the claims described below. Needless to say, various modifications and variations are possible.

  The present invention is applicable to a technical field related to a portable fuel cylinder valve.

100: Valve 110: Stem 120: Stem gasket 130: Outer cylinder 140: Check valve 150: Inner cylinder 160: Spring 170: Housing 180: Mountain cup

Claims (7)

Stem,
An outer cylinder coupled to the stem and having a first fixed protrusion formed on an inner peripheral surface;
A through hole is formed in the center, and a plurality of second fixing protrusions are formed apart from each other along the longitudinal direction on the outer peripheral surface, provided with a check valve at the lower end, and an inner cylinder inserted into the outer cylinder;
A spring that is arranged to surround the outer peripheral surface of the outer cylinder and generates a restoring force so as to restore the position of the stem;
An extension pipe portion communicating with the inside of the gas cylinder is connected, the stem, the outer cylinder, the inner cylinder, and the spring are disposed inside, and a housing in which a locking projection is formed on an inner peripheral surface,
When the outer cylinder is lowered by the stem lowering, the first fixing protrusion pushes at least one of the plurality of second fixing protrusions to lower the inner cylinder,
When the outer cylinder is raised, at least one of the plurality of second fixing protrusions is locked to the locking protrusion, and the rising of the inner cylinder is restricted, and the portable fuel cylinder valve is characterized in that . The first fixing protrusion is formed to be inclined downward;
2. The portable fuel cylinder valve according to claim 1, wherein the plurality of second fixing protrusions are formed to be inclined upward. 3. The locking protrusion is formed in a horizontal direction,
The portable fuel cylinder valve according to claim 2, wherein at least one of the plurality of second fixing protrusions or the locking protrusions is formed of a flexible material. 4. The portable device according to claim 3, wherein the spring is disposed between the locking projection and the stem, and provides a restoring force to raise the stem when the stem is lowered. Type fuel cylinder valve. The stem is formed with a gas inlet / outlet through which gas flows in / out,
The stem includes an orifice formed on an outer peripheral surface so as to communicate with the gas inlet / outlet;
The portable fuel cylinder valve further includes a stem gasket for opening and closing the orifice, and a mountain cup having a central portion coupled to an upper portion of the housing and an outer peripheral surface coupled to the gas cylinder. The portable fuel cylinder valve according to any one of claims 1 to 4. The portable fuel cylinder according to any one of claims 1 to 5, wherein the check valve includes a backflow prevention piece formed on an upper surface of the valve disk in order to prevent backflow. Valve. The first fixing protrusion is formed along an inner peripheral surface of the outer cylinder;
The plurality of second fixing protrusions are formed along an outer peripheral surface of the inner cylinder,
The portable fuel cylinder valve according to any one of claims 1 to 6, wherein the locking protrusion is formed along an inner peripheral surface of the housing.