JP3081569U - Gas tap - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a gas stopper capable of improving the sealing property of a gas flow path by a main valve body. SOLUTION: Gas plug main body 20, operating valve element 4, and main valve element 7
And an operating valve body spring 11 and a main valve body spring 8. The gas flow passage 21 and the plug 31 are provided in the gas stopper main body 20. The actuating valve element 4 is connected to the socket section 3 with respect to the plug section 31.
The gas flow path is provided so as to be openable and closable by connection and disconnection of connection 2. The main valve element 7 is provided so as to open and close a gas flow path in conjunction with opening and closing of the operating valve element 4. The operating valve element spring 11 is provided so as to urge the operating valve element 4 in the closing direction. Spring for main valve element 8
Is provided so that the main valve element 7 can be urged in the closing direction. The gas stopper main body 20 includes a valve seat 10a that is opened and closed in the axial direction of the main valve body 7 by the axial movement of the main valve body 7.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a gas tap (also called a gas outlet).

[0002]

[Prior art]

 An example of a conventional gas stopper is disclosed in, for example, Japanese Utility Model Laid-Open No. 2-72871. The gas stopper disclosed in the publication will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing the gas plug with the quick coupling disconnected, and FIG. 6 is a cross-sectional view showing the gas plug with the quick coupling connected.

The gas plug includes a gas plug main body 120, an operating valve element 104, a main valve element 107, an operating valve element spring 111, and a main valve element spring 108. The gas stopper main body 120 is provided with a gas flow path 121 through which a gas can flow, and a plug 131 to which a socket 132 of a quick joint can be connected at an end on the connection side of the gas flow path 121. The operating valve element 104 is provided so as to be able to open and close the gas flow channel 121 by connecting (see FIG. 6) and releasing the connection (see FIG. 5) of the socket part 132 of the quick coupling to the inside of the plug part 131. The main valve body 107 is provided so as to open and close the gas passage 121 in conjunction with opening and closing of the operation valve body 104. The operating valve element spring 111 is provided so as to always bias the operating valve element 104 in the closing direction (to the left in FIG. 5). The main valve body spring 108 is provided so as to be able to always bias the main valve body 107 in the closing direction (to the left in FIG. 5).

As shown in FIG. 5, when the socket portion 132 of the quick coupling is not connected to the plug portion 131 of the gas plug main body 120 (see FIG. 5), the main valve is biased by the main valve body spring 108. The body 107 is held at the closed position, and the operating valve body 104 is held at the closed position by the bias of the operating valve body spring 111. When the socket 132 of the quick fitting is connected to the plug 131 of the gas stopper main body 120 (see FIG. 6), the operating valve body 104 is operated by the shaft 132a provided in the socket 132. The main valve element 107 is opened against the urging force of the main valve element spring 108 while being opened against the urging force of the valve element spring 111.

[0005]

[Problems to be solved by the invention]

 In the conventional gas plug, the space between the main valve body 107 and the gas plug body 120 is sealed by airtight contact between the outer peripheral surface 107A of the main valve body 107 and the wall surface 121A of the gas flow path 121. Configuration. However, since the main valve body 107 opens and closes the gas passage 121 by sliding, there is not a small gap between the outer peripheral surface 107A of the main valve body 107 and the wall surface 121A of the gas passage 121. Become. Therefore, there is a problem that the sealing property of the gas passage 121 by the main valve body 107 is low.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to improve the sealing performance of a gas flow path by a main valve body. It is to provide a gas stopper.

[0007]

[Means for Solving the Problems]

 The above problem can be solved by a gas stopper having the configuration described in the column of the claims for utility model registration. In other words, according to the gas plug described in claim 1, when the socket portion of the quick coupling is not connected to the plug portion of the gas plug main body, the main valve element is biased to close the main valve element at the closed position. And the operating valve body is held at the closed position by the urging of the operating valve body spring. In addition, when the socket of the quick fitting is connected to the plug of the gas stopper body, the actuating valve is opened against the biasing force of the actuating valve spring and interlocked with the opening of the actuating valve. Then, the main valve element is opened against the urging force of the main valve element spring. Thus, the main body is provided with a main valve body valve seat that is closed by axial contact of the main valve body by axial movement of the main valve body and is opened by axial separation. I have. Therefore, the gas flow path is closed by the main valve body abutting on the main valve body valve seat in the axial direction. Therefore, the gas flow path of the gas plug body can be closed without being affected by the dimensional accuracy of the gap between the wall surface of the gas flow path and the outer surface of the main valve body that slides against the wall surface. Therefore, the sealing performance of the gas flow path by the main valve body can be improved.

According to the gas plug of the present invention, the main valve body is formed in the gas plug main body by forming the main valve body valve seat on the valve seat member fixed in the gas plug main body. The valve seat for the main valve body can be easily formed in the gas stopper main body as compared with the case where the valve seat for the valve is formed directly.

Further, according to the gas stopper described in claim 3, the sealing property of the main valve body and / or the valve seat for the main valve body improves the gas channel sealing performance of the main valve body. can do.

According to the gas stopper described in claim 4, the contact portion of the main valve body or the valve seat portion for the main valve body having a sharp cross section with respect to the substantially flat sealing surface of the sealing member. By the contact, the sealing property of the gas flow path by the main valve body can be improved.

Further, according to the gas plug described in claim 5, the main valve body and / or the auxiliary seal portion provided on the gas plug main body allows the shaft between the main valve body and the gas plug main body to have a shaft. Sealing is also performed in the direction crossing the direction. For this reason, the sealing performance of the gas flow path by the main valve body can be further improved. Further, the auxiliary seal portion is opened after the main valve body valve seat is opened due to the axial movement of the main valve body, and is closed before the main valve body is closed. Therefore, a smooth opening and closing operation of the main valve body can be obtained by gradually opening or closing the main valve body.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 is a front view showing a gas plug, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, FIG. 3 is a cross-sectional view showing the gas plug in a state where a quick coupling is connected, and FIG. It is sectional drawing shown in a state.

As shown in FIG. 2, the gas stopper includes a gas stopper main body 20, an operating valve element 4, a main valve element 7, an operating valve element spring 11, and a main valve element spring 8. Hereinafter, description will be made in order. First, the gas stopper main body 20 will be described. As shown in FIG. 2, the gas stopper main body 20 forms a substantially L-shaped gas flow path 21 through which gas can flow, and the main body pipe member 1, the connection pipe member 2, the plug pipe member 3, (See FIG. 1). The main body tube member 1 is formed in a substantially elbow shape. The connection pipe member 2 is externally screwed to one end (the lower end in FIG. 2) of the main body pipe member 1. For example, an upstream pipe is connected to the connection pipe member 2. Although not shown, a well-known overflow prevention valve (for example, see Japanese Utility Model Laid-Open No. 3-118371) is incorporated in the connection pipe member 2. The overflow prevention valve is provided so as to be reset by a closing operation of a main valve body 7 (described later).

The plug tube member 3 is internally screwed to the other end (the left end in FIG. 2) of the main body tube member 1. At the tip of the plug tube member 3 is provided a plug portion 31 to which a socket portion 32 of the quick joint can be connected (see FIG. 3). The tip of the plug tube member 3 corresponds to the “end on the connection side of the gas flow path” in this specification. The inner peripheral surface of the plug portion 31 is formed with a valve seat surface 3a formed of a tapered surface tapering toward the distal end. Further, the quick coupling is constituted by a combination of a socket portion 32 and a plug portion 31 and has a well-known configuration, and thus a detailed description thereof will be omitted. The socket portion 32 has a shaft portion 32a protruding from the shaft center portion.

The main body pipe member 1 is provided with two O-rings 19 for sealing between the main body pipe member 1 and the connection pipe member 2, and a stop ring 13 for preventing the connection pipe member 2 from coming off. Is installed. One O-ring 15 for sealing between the plug tube member 3 and the main body tube member 1 is mounted. The plug pipe member 3 is provided with an O-ring 16 for elastically sealing a gap between the plug valve member 3 and a valve plate portion 7a (described later) of the main valve body 7. The O-ring 16 seals a space between the main valve element 7 (described later) and the gas plug main body 20 in a direction intersecting the axial direction of the main valve element 7, that is, in a radial direction, and is referred to in this specification. It corresponds to an “auxiliary seal part”.

A substantially cylindrical valve seat member 10 is screwed into the inner portion (the right end in FIG. 2) of the plug tube member 3 so as to be internally fitted. The inner end of the valve seat member 10 is formed so as to gradually decrease its outer diameter toward the front (to the right in FIG. 2), and has a sharp cross section. An end of the valve seat member 10 having a sharp cross section is a main valve body valve seat 10a. The main valve body valve seat portion 10a can be brought into contact with a seal member 9 (described later) of the valve plate portion 7a of the main valve body 7. The main valve body valve seat portion 10a corresponds to a "contact portion which comes into contact with the sealing surface of the sealing member" in this specification. The valve seat member 10 is provided with an O-ring 17 for elastically sealing the space between the valve seat member 10 and the plug tube member 3.

Next, the operating valve element 4 will be described. As shown in FIG. 2, the operating valve element 4 has an operating valve portion 4a having a substantially frustoconical shape, and a substantially cylindrical coaxially continuous end surface (the right end surface in FIG. 2) of the operating valve portion 4a. And an interlocking cylindrical portion 4b. The guide member 5 is fitted in the interlocking tubular portion 4b so as to be externally fitted. The guide member 5 includes a substantially annular inner ring portion 5a fitted to the interlocking cylinder portion 4b and abutting on the operation valve portion 4a, and an appropriate number of spoke-shaped members (for example, the inner ring portion 5a). And four) outer ring portions 5b connected in a double annular shape via the connecting portions 5c.

The operating valve body 4 provided with the guide member 5 is disposed in the plug tube member 3. The guide member 5 (specifically, the outer ring portion 5b) is fitted to the inner peripheral surface of the plug tube member 3 so as to be slidable in the axial direction. The interlocking cylinder portion 4b of the operating valve body 4 is concentrically located in the valve seat member 10. The interlocking cylinder portion 4b is fitted to a guide shaft portion 7c (described later) of the main valve body 7 so as to be slidable in the axial direction. The interlocking cylinder portion 4b can be brought into contact with a valve plate portion 7a (described later) of the main valve body 7. In addition, a predetermined interval is formed between the interlocking cylinder portion 4b and the valve plate portion 7a when the operation valve body 4 and the main valve body 7 are closed (see FIG. 2).

The actuating valve portion 4a of the actuating valve body 4 closes the gas flow path 21 by abutment of the plug tube member 3 on the valve seat surface 3a by the axial movement of the actuating valve body 4, and separates the gas flow path 21. The gas passage 21 is further opened. Further, an O-ring 18 for elastically sealing the space between the plug valve member 3 and the valve seat surface 3a when the valve is closed is mounted on the operation valve portion 4a.

Further, the shaft portion 32a of the socket portion 32 can be brought into contact with the operating valve portion 4a when the socket portion 32 of the quick joint is connected to the plug portion 31 of the plug pipe member 3 (see FIG. 1). 3 and 4). The actuating valve portion 4a of the actuating valve element 4 opens the gas flow path 21 by contact of the shaft portion 32a of the socket portion 32 of the quick connection (see FIG. 3), and separates the gas flow from the shaft portion 32a by separation. The road 21 is closed (see FIG. 1). That is, the operating valve element 4 is provided so that the gas flow path can be opened and closed by connecting and disconnecting the socket part 32 of the quick coupling to the plug part 31 in the gas flow path 21.

Next, the main valve body 7 will be described. As shown in FIG. 2, the main valve element 7 has a substantially disk-shaped valve plate portion 7a and a substantially cylindrical shape coaxially connected to one end surface (the right end surface in FIG. 2) of the valve plate portion 7a. A sliding cylindrical portion 7b and a substantially cylindrical guide shaft portion 7c coaxially continuous with the other end surface (the left end surface in FIG. 2) of the valve plate portion 7a. The sliding cylinder portion 7b has an outer diameter larger than the outer diameter of the valve plate portion 7a. A tapered surface (symbols omitted) tapering toward the outer peripheral surface of the valve plate portion 7a is formed on the outer peripheral surface of the end portion of the sliding cylinder portion 7b on the valve plate portion 7a side. A substantially annular recess (reference numeral is omitted) is formed concentrically on the end surface of the valve plate portion 7a on the guide shaft portion 7c side, and the substantially annular recessed sealing member 9 is formed in the recess. Is fitted. Both end surfaces of the seal member 9 are flat surfaces, and the end surface on the guide shaft portion 7c side is the seal surface 9a.

The sliding cylinder portion 7b of the main valve body 7 is arranged in the axial direction of the plug tube member 3 along the wall of the gas passage 21 of the main tube member 1 of the gas plug body 20 (see FIG. 2). At the left and right directions).

Next, the operating valve body spring 11 will be described. As shown in FIG. 2, the operating valve element spring 11 is formed of, for example, a coil spring. The actuating valve body spring 11 is externally fitted to the interlocking cylinder portion 4b of the actuating valve body 4, and is actuated to oppose the valve plate portion 7a of the main valve body 7 and the valve plate portion 7a. The valve body 4 is interposed between the guide member 5 and the inner ring portion 5a. The operating valve element spring 11 always urges the operating valve element 4 in the closing direction (to the left in FIG. 2) by its elastic force, that is, the urging force.

Next, the main valve body spring 8 will be described. As shown in FIG. 2, the main valve body spring 8 is formed of, for example, a coil spring. The operating valve body spring 11 is fitted in the sliding cylinder portion 7b of the main valve body 7 so as to be fitted inside, and the valve plate portion 7a of the main valve body 7 and the gas plate facing the valve plate portion 7a. The plug body 20 is interposed between the inner wall surface (reference numeral 1a) of the body tube member 1 of the plug body 20. The main valve body spring 8 always urges the main valve body 7 in the closing direction (left side in FIG. 2) by its elastic force, that is, the urging force.

The main pipe member 1, the connecting pipe member 2, the plug pipe member 3, the operating valve element 4, the main valve element 7, the main valve element spring 8, the valve seat member 10, the operating valve element spring 11 and the stopper The ring 13 is formed of, for example, a metal material. The guide member 5 is formed of, for example, a resin material. Further, the seal member 9 and the O-rings 15, 17, 27, 18, 19 are formed of an elastic material such as rubber or synthetic rubber.

In the above-described gas plug, as shown in FIG. 1, when the socket portion 32 of the quick joint is not connected to the plug portion 31 of the gas plug main body 20, the main valve body spring 8 biases the main valve. The valve body 7 is held at the closed position, and the operating valve body 4 is held at the closed position by the urging of the operating valve body spring 11.

A case where the socket portion 32 of the quick joint is connected to the plug portion 31 of the gas plug body 20 from the above closed state will be described. First, as a first stage, after the shaft portion 32a of the socket portion 32 of the quick coupling abuts the operating valve portion 4a of the operating valve body 4, the operating valve body 4 resists the urging force of the operating valve body spring 11. Then, it is pushed rightward in FIG. As a result, the operating valve element 4 is separated from the valve seat surface 3a of the plug tube member 3 of the gas plug main body 20 (moving to the right in FIG. 2) and opened. Thereafter, the interlocking cylinder portion 4b of the operating valve body 4 comes into contact with the valve plate portion 7a of the main valve body 7 (see FIG. 4).

Subsequently, as a second stage, as the operating valve element 4 is separated by the shaft part 32 a of the socket part 32, the main valve element 7 resists the urging force of the main valve element spring 8. Pushed to the right in FIG. As a result, the main valve body 7 is separated from the main valve body valve seat portion 10a of the plug pipe member 3 of the gas plug main body 20 (moving to the right in FIG. 2) and is opened.

Subsequently, as a third stage, as the operating valve element 4 is separated by the shaft part 32 a of the socket part 32, the main valve element 7 is separated. Then, the valve plate portion 7a of the main valve body 7 is opened by being separated from the O-ring 16 of the plug tube member 3 of the gas stopper main body 20. Thereafter, the opening of the main valve element 7 is completed together with the connection of the socket part 32 of the quick joint to the plug part 31 of the gas stopper main body 20 (see FIG. 3). As described above, the connection of the socket portion 32 of the quick coupling to the plug portion 31 of the gas plug main body 20 is completed, and the opening of the main valve body 7 and the operation valve body 4 is completed. Becomes possible.

Further, a description will be given of a case where the connection of the socket portion 32 of the quick fitting connected to the gas stopper is released as described above. As the socket portion 32 of the quick joint is pulled out of the state shown in FIG. 3, the shaft portion 32a of the socket portion 32 is moved to the left in FIG. Then, the main valve body 7 and the actuating valve body 4 are advanced in the contacting direction by the urging force of the main valve body spring 8 (meaning the movement to the left in FIG. 3).

As a result, first, as a first step, the valve plate portion 7 a of the main valve element 7 is fitted into the O-ring 16 of the plug pipe member 3 of the gas plug main body 20, thereby closing the plug. Subsequently, as a second step, the sealing surface 9a of the sealing member 9 of the valve plate portion 7a of the main valve body 7 elastically contacts the valve seat portion 10a for the main valve body of the valve seat member 10 of the gas plug body 20. By contact, the main valve body 7 is closed (see FIG. 3).

Subsequently, as a third stage, the operating valve element 4 is advanced in the contact direction by the urging force of the operating valve element spring 11, whereby the valve seat surface of the plug pipe member 3 of the gas plug main body 20 is formed. The O-ring 18 of the operating valve portion 4a of the operating valve body 4 elastically abuts inside 3a, whereby the operating valve body 4 is closed (see FIG. 2). As described above, the release of the connection of the socket portion 32 of the quick joint to the plug portion 31 of the gas plug main body 20 is completed, and the closing of the main valve body 7 and the operating valve body 4 is completed. Supply is shut off.

According to the above-described gas plug, the gas plug main body 20 is closed by the axial movement of the main valve element 7 by the axial contact of the main valve element 7 and is separated by the axial separation. It has a main valve body valve seat 10a that is opened. Therefore, the gas passage 21 is closed by the main valve body 7 abutting on the main valve body valve seat portion 10a in the axial direction. Therefore, the gas flow path 21 of the gas plug main body 20 can be formed without being affected by the dimensional accuracy of the gap between the wall surface of the gas flow path 21 and the outer surface of the main valve element 7 sliding on the wall surface. Since it can be closed, the sealing performance of the gas flow path 21 by the main valve element 7 can be improved.

Further, a valve seat portion 10 a for a main valve body is formed on the valve seat member 10 fixed in the gas stopper main body 20. Thus, the main valve body valve seat portion 10a can be easily formed in the gas plug main body 20 as compared with the case where the main valve body valve seat portion 10a is directly formed in the gas plug main body 20. .

Further, the sealing property of the gas flow path 21 by the main valve element 7 can be improved by the seal member 9 provided on the main valve element 7.

Further, the sealing property of the gas flow path 21 by the main valve element 7 is improved by the contact of the main valve element valve seat portion 10 a having a sharp cross section with the substantially flat sealing surface 9 a of the sealing member 9. Can be.

Further, the space between the main valve element 7 and the gas plug main body 20 is sealed in the radial direction of the main valve element 7 by the O-ring 16 provided on the gas plug main body 20. For this reason, the sealing performance of the gas flow path 21 by the main valve element 7 can be further improved. Further, the O-ring 16 is opened after the main valve element 7 is opened by the axial movement of the main valve element valve seat 10a, and is closed before the main valve element valve seat 10a is closed. Accordingly, the main valve element 7 can be smoothly opened and closed by opening or closing the main valve element 7 stepwise.

The present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the present invention. For example, the valve seat portion 10 a for the main valve body can be formed integrally with the main pipe member 1 or the plug pipe member 3 of the gas plug main body 20 instead of the valve seat member 10. Further, the seal member 9 for elastically sealing between the main valve element 7 and the main valve element valve seat 10a may be provided in the main valve element valve seat 10a instead of the main valve element 7. , Can be provided on both members. When the seal member 9 is provided on the main valve body valve seat 10a, the contact portion of the main valve body 7 that comes into contact with the sealing surface 9a of the seal member 9 may be formed to have a sharp cross section.

The O-ring 16 for radially sealing the space between the gas plug main body 20 and the main valve body 7 may be provided on the main valve body 7 instead of the gas plug main body 20, or provided on both members. It is possible. Further, the O-ring 18 for elastically sealing the gap between the operating valve element 4 and the plug section 31 may be provided on the plug section 31 instead of the operating valve element 4, or may be provided on both members. is there.

[0040]

[Effect of the invention]

 As described above, according to the gas plug of the present invention, the gas stopper is not affected by the dimensional accuracy of the gap between the wall surface of the gas flow passage and the outer surface of the main valve body that slides on the wall surface. Since the gas flow path of the gas stopper body can be closed, the sealing property of the gas flow path by the main valve body can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a gas stopper according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view showing a gas plug in a state where a quick coupling is connected.

FIG. 4 is a cross-sectional view showing the gas tap in a state in which a quick coupling is being connected.

FIG. 5 is a cross-sectional view showing a conventional gas tap in a state where a quick coupling is not connected.

FIG. 6 is a cross-sectional view showing a conventional gas plug in a state where a quick coupling is connected.

[Explanation of symbols]

 Reference Signs List 4 operating valve element 7 main valve element 8 main valve element spring 9 sealing member 9a sealing surface 10 valve seat member 10a main valve element valve seat section 11 operating valve element spring 16 O-ring (auxiliary sealing section) 20 gas stopper body 21 Gas flow path 31 Plug part 32 Socket part

Claims (5)

[Utility model registration claims] A gas valve main body, an operating valve element, a main valve element, an operating valve element spring, and a main valve element spring; a gas flow path through which gas can flow; A plug portion capable of connecting a socket portion of the quick joint is provided at an end on the connection side of the gas flow path, and the operating valve body is connected to and released from the socket portion of the quick joint with respect to the plug portion. A gas flow path is provided so as to be openable and closable. The main valve body is provided so as to be able to open and close the gas flow path in conjunction with opening and closing of the operating valve body. The operating valve body spring includes the operating valve body. The main valve body spring is a gas stopper that is always provided to be capable of biasing the main valve body in the closing direction. The main valve body is closed by the axial contact of the main valve body due to the axial movement of the main valve body. A gas valve comprising a main valve body valve seat portion that is opened by axial separation. 2. The gas stopper according to claim 1, wherein the main valve body valve seat is formed in a valve seat member fixed in the gas stopper main body. 3. The gas stopper according to claim 1, wherein the main valve body and / or the valve seat for the main valve body is provided with a sealing member for sealing between the two. And gas tap. 4. The gas stopper according to claim 3, wherein the sealing surface of the sealing member is formed to be substantially flat, and the main valve body or the valve seat portion for the main valve body abutting the sealing surface. A gas stopper characterized in that an abutting portion is formed to have a sharp cross section. 5. The gas stopper according to claim 1, wherein the main valve body and / or the gas stopper main body are arranged so as to intersect with each other in an axial direction of the main valve body. An auxiliary seal portion for sealing is provided, wherein the auxiliary seal portion is opened after the main valve body valve seat is opened due to the axial movement of the main valve body and is closed before the main valve body is closed. A gas cock.