JP2015098897A - Gas valve with inspection hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas valve with an inspection hole capable of fixing a handle at an inspection position.SOLUTION: A protrusion 2h is formed on an outer surface where an inspection hole 2g is opened, in a valve body 2. A cap is threaded and fixed to the protrusion 2h in a removable manner. In an upper end portion of the valve body 2, a lock member 61 is provided so as to be unrotatable and movable in a length direction of the protrusion 2h. The lock member 61 is energized toward a distal end side of the protrusion 2h by a coil spring 63. On an inner peripheral surface of the handle 4, an engaging recess 64 is formed. When the handle 4 is rotated to an inspection position, the lock member 61 is moved to the distal end side of the protrusion 2h by the coil spring 63, and a lock piece 61b of the lock member 61 enters the engaging recess 64. Thus, the handle 4 can be locked at the inspection position in an unrotatable manner.

Description

  The present invention relates to a gas stopper with an inspection hole that can be used for gas pressure inspection, air purge in a gas pipe, and the like.

  In general, a gas stopper with an inspection hole is, as described in Patent Document 1 below, a valve body and a valve body provided in a valve housing hole of the stopper body so as to be rotatable between a closed position and an open position. And a handle rotatably disposed outside the plug body and non-rotatably coupled to the valve body.

  A gas inflow hole, a gas outflow hole, and an inspection hole are formed in the plug body. One end of each of the gas inflow hole, the gas outflow hole, and the inspection hole opens to the outer surface of the stopper main body, and each other end opens to the inner surface of the valve housing hole. When the valve body is rotated to a predetermined inspection position between the closed position and the open position, the inspection hole communicates with at least one of the gas inflow hole and the gas outflow hole. As a result, gas pressure inspection and air purge can be performed.

Japanese Utility Model Publication No. 63-118463

  The conventional gas stopper with inspection hole does not have a function indicating that the handle is located at the inspection position. For this reason, it is difficult for the operator to confirm whether or not the handle is located at the inspection position. In addition, since the handle does not have a function for fixing the position at the inspection position, the handle may rotate due to an accident during gas pressure inspection or air purge, and may be out of the inspection position. .

In order to solve the above-mentioned problem, the present invention includes a plug main body in which a gas inlet hole, a gas outlet hole, and an inspection hole that are respectively opened in the inner peripheral surface of the valve storage part and the valve storage part are formed. A valve body rotatably accommodated between a closed position and an open position in the valve accommodating portion; and a handle rotatably disposed outside the plug body and non-rotatably connected to the valve body. When the valve body is positioned by the handle at a predetermined inspection position between the closed position and the open position, the inspection hole communicates with at least one of the gas inflow hole and the gas outflow hole. In the perforated gas stopper, between the stopper body and the handle, when the handle is located between the closed position and the inspection position and between the inspection position and the open position, Allow the handle to rotate and When the dollar is positioned at the inspection position, a locking mechanism is provided for locking the handle to the stopper body so as not to rotate. The stopper body releases the locking state of the handle by the locking mechanism. The operation member is provided so as to be operable from the outside of the plug body.
In this case, the locking mechanism includes a locking member provided on the stopper main body so as to be movable between an allowable position and a locking position, and the locking member is moved from the allowable position toward the locking position. Biasing means for biasing and an engaging portion provided on the handle, wherein the handle is located between the closed position and the inspection position and between the open position and the inspection position. When the locking member is positioned at the allowable position, the rotation of the handle is allowed. When the handle is positioned at the inspection position, the locking member is moved to the locking position by the biasing means. It is desirable that the handle is moved and engaged with the engaging portion, whereby the handle is non-rotatably locked to the plug body in the inspection position.
The outer surface of the plug body is formed with a protruding portion where the inspection hole is opened at the distal end surface. A cap for closing the inspection hole is detachably attached to the protruding portion, and the cap is attached to the protruding portion. In the state where the locking member is moved to the permissible position via the operation member by the cap, the locking member is moved by the biasing means in the state where the cap is removed from the protruding portion. It is desirable to move from the allowable position to the locking position.
The locking member is disposed between the outer surface of the plug body and the inner surface of the handle, and a part of the locking member is exposed to the outside from between the plug body and the handle, and a part thereof It is desirable that the operation member is also used.

  According to this invention having the above-described characteristic configuration, when the handle is positioned at the inspection position, the handle is non-rotatably locked by the locking mechanism by the locking mechanism. Therefore, the operator can confirm that the handle is located at the inspection position. And it can prevent reliably that a handle | steering wheel rotates and remove | deviates from an inspection position by accident.

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention in a state where a valve body is located at a closed position. 2 is a cross-sectional view taken along line XX of FIG. 3 is a partially omitted cross-sectional view taken along line YY of FIG. FIG. 4 is an enlarged cross-sectional view taken along line ZZ in FIG. FIG. 5 is a longitudinal sectional view showing the embodiment with the valve body positioned at the open position. 6 is a cross-sectional view taken along line XX in FIG. FIG. 7 is a longitudinal sectional view showing the embodiment in a state where a gas pressure inspection or the like is performed with the valve body positioned at the inspection position. FIG. 8 is a cross-sectional view taken along line XX of FIG. FIG. 9 is a plan view showing the embodiment with the handle removed. FIG. 10 is a plan view showing a handle used in the embodiment. FIG. 11 is a bottom view of the handle. FIG. 12 is an enlarged cross-sectional view taken along line XX in FIG. FIG. 13 is a plan view showing a locking member used in the embodiment. FIG. 14 is a side view of the locking member. FIG. 15 is a cross-sectional view taken along line XX of FIG. FIG. 16 is a perspective view of the locking member. FIG. 17 is a perspective view of the locking member viewed from a direction different from FIG. 16. FIG. 18 is a longitudinal sectional view showing a second embodiment of the present invention.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 17 show a first embodiment of a gas stopper with an inspection hole according to the present invention. As shown in FIGS. 1, 2, and 5 to 8, the gas stopper 1 with an inspection hole according to this embodiment mainly includes a stopper body 2, a valve body 3, a handle 4, a connecting member 5, and a locking mechanism 6. As a component.

  As shown in FIGS. 2, 5, and 8, the plug body 2 extends linearly, and a valve accommodation hole (valve accommodation portion) 2 a is formed in the middle portion in the longitudinal direction. The valve housing hole 2 a is arranged with its axis line oriented in a direction perpendicular to the longitudinal direction of the plug body 2, and extends from one side of the outer peripheral surface of the plug body 2 toward the other side. The valve accommodation hole 2a is composed of a straight hole 2b on the opening side and a tapered hole 2c on the bottom side. The straight hole portion 2b and the tapered hole portion 2c are arranged with their axes aligned. The straight hole 2b has a constant inner diameter. The tapered hole portion 2c has a smaller diameter toward the bottom side. The valve housing hole 2a may be entirely constituted by a tapered hole part or may be constituted by a straight hole part.

  A gas inflow hole 2 d and a gas outflow hole 2 e extending along the longitudinal direction of the plug body 2 are formed inside the plug body 2. The gas inflow hole 2d is disposed on one end side (right side in FIG. 2) of the plug body 2 with respect to the valve accommodation hole 2a. The gas outflow hole 2e is disposed on the other end side of the plug body 2 with respect to the valve housing hole 2a. Moreover, the gas inflow hole 2d and the gas outflow hole 2e are arranged so that their axes coincide with each other and are orthogonal to the axis of the valve housing hole 2a.

  One end of the gas inflow hole 2d is opened on one end surface (the right end surface in FIG. 2) of the plug body 2. A tapered female thread portion 2f is formed on the inner peripheral surface on the opening side. A primary gas pipe (not shown) is screwed and fixed to the tapered female thread portion 2f. Gas is supplied from the primary side gas pipe to the gas inflow hole 2d. The other end of the gas inflow hole 2d is opened on the inner peripheral surface of the tapered hole 2c.

  One end of the gas outflow hole 2e is opened to the other end surface (left end surface in FIG. 2) of the plug body 2. A tubular joint member 7 is rotatably provided in an airtight state on the outer peripheral surface of one end of the plug body 2 where the gas outflow hole 2e is opened. A gas device (not shown) is connected to the joint member 7 directly or indirectly through a gas pipe. As a result, the gas flowing in from the gas inflow hole 2d passes through a through hole 3a of the valve body 3 described later, and is supplied to the gas equipment through the gas outflow hole 2e and the joint member 7. The other end of the gas outflow hole 2e is opened on the inner peripheral surface of the tapered hole 2c. The openings of the gas outflow holes 2e and the gas inflow holes 2d on the inner peripheral surface of the tapered hole 2c are spaced apart from each other by 180 ° in the circumferential direction.

  The plug body 2 has an inspection hole 2g. The inspection hole 2g is arranged so that its axis is orthogonal to the axes of the gas inflow hole 2d, the gas outflow hole 2e, and the tapered hole 2c. An outer end portion (right end portion in FIG. 1) of the inspection hole 2 is opened on the outer surface of the plug body 2. The inner end of the inspection hole 2g is opened on the inner peripheral surface of the tapered hole 2c. The opening portion of the inspection hole 2g on the inner peripheral surface of the tapered hole portion 2c is spaced by 90 ° in the circumferential direction from each opening portion of the gas inflow hole 2d and the gas outflow hole 2e on the inner peripheral surface of the tapered hole portion 2c. ing. The inspection holes 2g are not necessarily arranged as described above, and other known arrangements may be adopted.

A ball valve 8 is provided inside the inspection hole 2g so as to be movable in the longitudinal direction of the inspection hole 2g. On the inner peripheral surface of the inspection hole 2g located outside the ball valve 8, an annular valve seat member 9 is provided in a fixed position. The valve seat member 9 is composed of an O-ring, but may be composed of other members. A ball valve 8 is seated on the valve seat member 9 by a coil spring 10 as an urging means. When the ball valve 8 is seated on the valve seat member 9, the inspection hole 2g is closed. When the ball valve 8 is separated from the valve seat member 9 against the urging force of the coil spring 10, the inspection hole 2g is opened.

A protrusion 2h is formed on the outer surface of the plug body 2 where the inspection hole 2g is opened. In other words, the inspection hole 2g is opened at the distal end surface of the protrusion 2h. The projecting portion 2h has a circular cross section, and is arranged such that its axis coincides with the axis of the inspection hole 2g.

The cap 11 is screwed into the protruding portion 2h. The cap 11 is fixed to the projecting portion 2 h by being tightened until the tip surface thereof abuts against the outer surface of the plug body 2. In the fixed state, the projection 2h is covered, and thus the opening outside the inspection hole 2g is covered. This prevents the ball valve 8 from being separated from the valve seat member 9 and the inspection hole 2g being opened due to an accident. The space between the inner peripheral surface of the cap 11 and the outer peripheral surface of the protruding portion 2h is sealed with a seal member 12 such as an O-ring.

A gas pipe (not shown) can be connected to the protrusion 2h. In this case, the gas pipe can be directly connected to the protruding portion 2h by extrapolation. However, in this embodiment, the gas pipe is connected to the protruding portion 2h using the quick joint type plug P and socket S. To connect to. That is, as shown in FIGS. 7 and 8, when the gas pipe is connected to the protruding portion 2h, the cap 11 is first removed from the protruding portion 2h. Thereafter, a plug P having an outer shape and dimensions of a quick joint type plug defined in Japanese Industrial Standard JIS S 2135 is screwed and fixed to the protruding portion 2h. Next, the socket S is detachably attached to the plug P. One end of a gas pipe is connected to the socket S, and a measuring instrument such as a pressure gauge is connected to the other end of the gas pipe.
Note that the structure for connecting the plug P and the socket S is the same as a well-known structure, and thus detailed description thereof is omitted.

The valve body 3 is rotatably accommodated in the tapered hole portion 2c of the valve accommodation hole 2a. The valve body 3 is rotatable between a closed position shown in FIGS. 1 and 2 and an open position shown in FIGS. 5 and 6. The valve body 3 is formed with a through hole 3a that penetrates from one side of the outer peripheral surface to the other side. The through hole 3a is disposed at the same position as the gas inflow hole 2d and the gas outflow hole 2e in the axial direction of the valve housing hole 2a. The inner diameter of the through hole 3a is set to be substantially the same as the inner diameter of the gas inflow hole 2d and the gas outflow hole 2e.

As shown in FIGS. 1 and 2, when the valve body 3 is rotated to the closed position, the one end portion 3b and the other end portion 3c of the through hole 3a are opened at the tapered hole portion 2c of the gas inlet hole 2d and the gas outlet hole 2e. Are spaced apart from each other in the circumferential direction. As a result, the gas inflow hole 2d and the gas outflow hole 2e are blocked by the valve body 3, and the gas stopper 1 is closed. As shown in FIGS. 5 and 6, when the valve body 3 is rotated to the open position, both end portions 3b and 3c of the through hole 3a are opposed to the openings of the gas inflow hole 2d and the gas outflow hole 2e, respectively. The inflow hole 2d and the gas outflow hole 2e communicate with each other through the through hole 3a. As a result, the gas stopper 1 is opened.

As shown in FIGS. 2, 6, and 8, first and second communication grooves 2i and 2j extending in the circumferential direction are formed on the inner peripheral surface of the tapered hole portion 2c. The first communication groove 2i extends from the inspection hole 2g toward the gas inflow hole 2d (counterclockwise in FIG. 2). On the other hand, the second communication groove 2j extends from the side of the gas outflow hole 2e opposite to the inspection hole 2g toward the gas inflow hole 2d (clockwise in FIG. 2). The length of the second communication groove 2j (the length along the circumferential direction of the tapered hole portion 2c) is longer than the length of the first communication groove 2i.

As shown in FIG. 8, when the valve body 3 is positioned at a predetermined inspection position between the closed position and the open position, the inner end portion of the inspection hole 2g communicates with the one end portion 3b of the through hole 3a. At this time, the gas inflow hole 2d and the gas outflow hole 2e communicate with each other through the through hole 3a, and the gas stopper 1 is in a half-open state. That is, the gas appliance can be used. Therefore, by connecting a pressure gauge to the inspection hole 2g, the gas pressure can be measured in a state where the gas appliance is used (combustion state). The inspection position is arranged at the center between the closed position and the open position, but may be set at a position slightly away from the center position toward the closed position or the open position.

As shown in FIG. 2, when the valve body 3 is positioned at the closed position, one end 3b of the through hole 3a is separated from the gas inflow hole 2d, and the through hole 3a and the gas inflow hole 2d are blocked. The However, the one end portion 3b of the through hole 3a communicates with the inspection hole 2g via the first communication groove 2i. Moreover, the other end 3c of the through hole 3a communicates with the gas outflow hole 3e. Therefore, when the valve body 3 is positioned at the closed position, the inspection hole 2g can be blocked from the gas inflow hole 2d and communicated with the gas outflow hole 2e. Thereby, it is possible to inspect whether or not there is a gas leakage location in the gas pipe downstream of the gas plug 1.

Contrary to the above, when the valve body 3 is positioned at the closed position, the inspection hole 2g may be communicated with the gas inflow hole 2d while being blocked from the gas outflow hole 2e. By doing so, it is possible to inspect whether or not there is a gas leak location in the pipe upstream of the gas plug 1.

As is apparent from FIG. 8, if the width in the circumferential direction of the inspection hole 2g on the inner peripheral surface of the tapered hole portion 2c is increased counterclockwise in FIG. 8, one end portion in the clockwise direction of the opening portion of the inspection hole 2g. Can be directly communicated with the through hole 3a. Therefore, in such a case, the first communication groove 2i is unnecessary. Further, in this embodiment, when the valve body 3 is positioned at the inspection position, the through hole 3a is in direct communication with the gas outflow hole 3e. Accordingly, the second communication groove 2j is not necessarily formed.

As shown in FIGS. 1, 3, 5, 7, and 9, an annular surrounding wall 2 k is formed on the outer surface (upper surface in FIG. 1) of the plug body 2 where the straight hole 2 b opens. Yes. The surrounding wall portion 2k is arranged with its axis aligned with the axis of the straight hole 2b (the axis of the valve housing hole 2a).

As shown in FIGS. 1, 5, and 7, a handle 4 is provided outside the plug body 2. As shown in FIGS. 10 and 11, the handle 4 has a disk shape, and is disposed so as to be rotatable in a state in which the axis thereof coincides with the axis of the valve housing hole 2 a. On the end surface of the handle 4 facing the plug body 2 (the lower end surface in FIG. 1; for convenience of explanation, each component of the gas plug 1 will be described using the top, bottom, left and right in FIG. 1). Part 4a is formed. The annular protrusion 4 a is arranged with its axis line coincided with the axis line of the handle 4. An encircling wall 2k is inserted into the annular protrusion 4a so as to be relatively rotatable. The inner diameter of the annular protrusion 4a is set to be larger than the outer diameter of the surrounding wall 2k by a predetermined dimension. Therefore, an annular gap is formed between the inner peripheral surface of the annular protrusion 4a and the outer peripheral surface of the surrounding wall portion 2k.

As shown in FIGS. 1, 5 and 7, the straight hole 2b is rotatably provided with the connecting member 5 being prevented from coming off upward. The lower end portion of the connecting member 5 is connected to the valve body 3 so as not to rotate. The upper end portion of the connecting member 5 is connected to the handle 4 so as not to rotate. Therefore, when the handle 4 is rotated, the valve body 3 rotates following the rotation. Thus, since the handle 4 rotates integrally with the valve body 3, each position of the handle 4 when the valve body 3 is located at the closed position, the open position, and the inspection position is also the closed position, the open position, and the inspection position. Respectively.

A locking mechanism 6 is provided between the stopper body 2 and the handle 4. The locking mechanism 6 is for locking the handle 4 to the stopper body 2 in a non-rotatable manner when the handle 4 is rotated to the inspection position in a state where the cap 11 is removed from the protruding portion 2h. It is structured as follows.

As shown in FIGS. 1, 3, 5, 7, and 9, a circular locking member 61 having a ring shape is externally inserted into the surrounding wall portion 2 k. The inner diameter of the locking member 61 is set larger than the outer diameter of the surrounding wall portion 2k. Therefore, the locking member 61 is movable in a direction perpendicular to the axis with respect to the surrounding wall portion 2k.

As shown in FIGS. 3 and 9, a pair of flat portions 62 and 62 are formed on the outer peripheral surface of the surrounding wall portion 2 k. The pair of flat portions 62, 62 are arranged 180 degrees apart from each other in the circumferential direction of the surrounding wall portion 2k. Moreover, the plane portion 62 is disposed in parallel with the axis of the protruding portion 2h. As shown in FIGS. 13, 16, and 17, a pair of flat surface portions 61 a and 61 a are formed on the inner peripheral surface of the locking member 61. The pair of flat portions 61a and 61a are disposed 180 degrees apart from each other in the circumferential direction of the locking member 61, and are slidably in contact with the flat portions 62 and 62, respectively. Therefore, the locking member 61 can move only in the radial direction of the surrounding wall portion 2k in a direction parallel to the protruding portion 2h. In addition, since the flat portions 61a and 61a and the flat portions 62 and 62 are in contact with each other, the locking member 61 is not rotatable with respect to the surrounding wall portion 2k and eventually the plug body 2.

  As shown in FIGS. 13 to 17, on one side of the outer peripheral surface of the locking member 61, a base end portion of a locking piece (part of the locking member; operation member) 61 b is integrated with the locking member 61. Is formed. The locking piece 61b may be formed separately from the locking member 61, and its base end may be fixed to the locking member 61 by a screw mechanism or other fixing means. As shown in FIGS. 1, 5, and 7, the distal end portion of the locking piece 61 b extends downward toward the projecting portion 2 h between the surrounding wall portion 2 k and the annular projecting portion 4 a. The distal end portion (lower end portion in FIG. 1) of the locking piece 61b is opposed to the distal end surface (left end surface in FIG. 1) of the cap 11 screwed and fixed to the protruding portion 2h.

  As shown in FIGS. 1, 4, 5, and 7, a coil spring (biasing means) 63 is provided between the surrounding wall portion 2k and the locking piece 61b. The coil spring 63 urges the locking piece 61b in a direction (rightward in FIG. 3) from the proximal end side to the distal end side of the protruding portion 2h. Thus, the locking piece 61b is pressed against the tip surface of the cap 11 screwed and fixed to the protruding portion 2h. The position of the locking member 61 at this time is the release position. 3 and 9, when the locking piece 61b is pressed against the cap 11, the side portion of the inner peripheral surface of the locking member 61 where the locking piece 61b is provided is the surrounding wall portion. A side portion of the inner peripheral surface of the locking member 61 that is substantially in contact with the outer peripheral surface of the 2k and that is located on the opposite side of the locking piece 61b is greatly separated from the outer peripheral surface of the surrounding wall portion 2k. Therefore, when the cap 11 is removed from the protrusion 2 h, the locking member 61 is moved to the tip end side of the protrusion 2 h by the coil spring 63.

  As shown in FIGS. 7, 11, and 12, an engagement recess (engagement) extending upward from the lower end surface (tip surface) of the annular protrusion 4 a is formed on the inner peripheral surface of the annular protrusion 4 a of the handle 4. Part) 64 is formed. The engaging recess 64 is arranged to face the locking piece 61b when the handle 4 is rotated to the inspection position. In addition, when the locking member 61 is moved to the distal end side of the protruding portion 2 h by the coil spring 63, the internal dimension of the engaging recess 64 is determined so that the locking piece 61 b can enter the engaging recess 64. It has been. Accordingly, when the handle 4 is rotated to the inspection position with the cap 11 removed from the protrusion 2h, the locking member 61 is moved rightward in FIG. 7 by the coil spring 63, and the locking piece 61b is engaged with the engagement recess. 64. The width of the engaging recess 64 (the width in the circumferential direction of the handle 4) is set to be substantially the same as the width of the locking piece 61b. Therefore, when the locking piece 61b enters the engaging recess 64, the handle 4 is locked with respect to the plug body 2 so as not to rotate, and is fixed at the inspection position. Note that the locking member 61 moved to the right in FIG. 7 stops when the locking piece 61 b hits the bottom surface of the engaging recess 64. The position of the locking member 61 at this time is the locking position. The locking position of the locking member 61 may be determined by abutting the left side portion of the inner peripheral surface of the locking member 61 against the left side portion of the outer peripheral surface of the surrounding wall portion 2k.

  When the gas pressure is inspected using the gas plug 1 having the above-described configuration, the handle 4 is placed in the closed position in advance. First, the cap 11 is removed from the protruding portion 2h. Thereafter, as shown in FIGS. 7 and 8, the plug P is screwed and fixed to the projecting portion 2h. In addition, since the spherical body 8 is seated on the valve seat member 9 by the coil spring 10, the inspection hole 2g is closed. Therefore, even if the cap 11 is removed, gas does not leak from the inspection hole 2g.

  Thereafter, the socket S is connected to the plug P. Then, the push rod Sa of the socket S pushes the ball valve 8 and separates it from the valve seat member 9. Thereby, the inspection hole 2g is opened. Note that a pressure gauge is connected to the socket S in advance via a gas pipe (both not shown). Note that the connection of the socket S to the plug P may be performed after the handle 4 described below is rotated from the closed position to the inspection position.

Next, the handle 4 is rotated from the closed position toward the inspection position. When the handle 4 reaches the inspection position, the locking piece 61b faces the engaging recess 64. Then, the locking member 61 is moved to the distal end side of the protruding portion 2 h by the coil spring 10, and the locking piece 61 b enters the engagement recess 64. As a result, the handle 4 is non-rotatably locked at the inspection position with respect to the plug body 2. When the handle 4 is positioned at the inspection position, the gas stopper 1 is in a half-open state, and the inspection hole 2g communicates with the gas inflow hole 2d and the gas outflow hole 2e. Accordingly, a part of the gas flowing in the gas plug 1 flows into the inspection hole 2g and is introduced into the pressure gauge through the socket S and the gas pipe. And the pressure of the gas which distribute | circulates the inside of the gas stopper 1 with a pressure gauge is measured.
When the handle 4 is first rotated to the inspection position after the construction of the gas plug 1 and the piping, the pressure gauge is not connected to the socket S and is opened to the outside, so that the gas pipe 1 in the upstream side of the gas plug 1 is opened. Can be discharged from the socket S to the outside. That is, air purge can be performed.

After the measurement of the gas pressure, the gas stopper 1 is returned to the original state shown in FIG. 1 as follows. First, the socket S is removed from the plug P. Then, the ball valve 8 is seated on the valve seat member 9, and the inspection hole 2g is closed. Next, the plug P is removed from the protrusion 2h. Thereafter, the cap 11 is screwed into the protruding portion 2h. The cap 11 abuts against the locking piece 61b after being screwed into the protruding portion 2h and before being fixed. Therefore, when the cap 11 is further screwed into the protruding portion 2h, the cap 11 moves the locking member 61 to the left in FIG. 7 against the urging force of the coil spring 63, and the locking piece 61b is moved to the left. Move. As a result, the locking piece 61b comes out of the engaging recess 64. After the engagement piece 61b comes out of the engagement recess 64, the tip surface of the cap 11 abuts against the outer surface of the plug body 2 and is fixed to the protrusion 2h. When the locking piece 61b is extracted from the engaging recess 64, the handle 4 can be rotated from the inspection position to the closed position side and the open position side. By rotating the handle 4 from the inspection position to the closed position, the gas stopper 1 is returned to the original state shown in FIG. In addition, after fixing the cap 11, the gas stopper 1 can be used similarly to a normal gas stopper by opening and closing the handle 4. Of course, the handle 4 is not locked in the inspection position.

In the gas stopper 1 having the above-described configuration, the locking piece 61b does not engage with the engaging recess 64 unless the cap 11 is removed from the protruding portion 2h. Therefore, the inspection hole 2g for gas pressure measurement, air purge, etc. is used. During normal opening / closing work other than the work to be performed, the handle 4 is not locked at the inspection position. Therefore, the handle 4 can be opened and closed without any trouble.

On the other hand, in a state where the cap 11 is removed from the protruding portion 2h for gas pressure inspection or the like, when the handle 4 is rotated to the inspection position, the locking piece 61b automatically engages with the engagement recess 64, and the handle 4 is locked to the stopper body 2 and is fixed in the inspection position. Therefore, the operator can recognize that the handle 4 is located at the inspection position. In addition, since the locking piece 61b prevents the handle 4 from rotating from the inspection position, it is possible to reliably prevent the handle 4 from being rotated from the inspection position by an accident during gas pressure measurement or the like. it can.

Further, when the cap 11 is screwed and fixed to the protruding portion 2h after work such as gas pressure inspection, the locking piece 61b is pushed by the cap 11 and comes out of the engaging recess 64, and the locking state of the handle 4 is automatically released. Is done. Therefore, it is not necessary to perform a special operation for releasing the locked state of the handle 4, and the labor of the operation can be reduced accordingly. In addition, since the handle 4 cannot be rotated from the inspection position unless the cap 11 is screwed and fixed to the protruding portion 2h, it is possible to prevent the cap 11 from being forgotten to be closed.

FIG. 18 shows a second embodiment of the present invention. In the gas plug with inspection hole 1A of this embodiment, the distal end portion of the cap 11 is screwed into the proximal end portion of the outer peripheral surface of the protruding portion 2h. A plug portion 21 is formed on the outer peripheral surface of the protruding portion 2h located on the tip side of the portion where the cap 11 is screwed. Therefore, when the cap 11 is removed from the protruding portion 2h, the socket S can be directly connected to the plug portion 21 of the protruding portion 2h. Other configurations are the same as those of the above-described embodiment, and the same reference numerals are given to the same parts and the description thereof is omitted.

In addition, this invention is not limited to said embodiment, A various modification is employable in the range which does not deviate from the summary.
For example, in the above embodiment, the present invention is applied to the so-called I-type gas plug 1 in which the gas inflow hole 2d and the gas outflow hole 2e are arranged in a straight line. It can also be applied to so-called L-shaped gas stoppers in which the gas outlet hole and the gas outlet hole are respectively arranged on two orthogonal lines. In that case, one of the gas inflow hole and the gas outflow hole is opened on the inner peripheral surface of the valve accommodation hole, and the other is opened on the bottom surface of the valve accommodation hole. Of course, the inspection hole is opened in the inner peripheral surface of the valve accommodation hole.
In the above embodiment, the locking piece 61b that engages with the engaging recess 64 is also used as the operating member. However, the operating member is formed separately from the locking member 61, and the operating member is plugged. The main body 2 can be moved and can be operated from the outside of the plug main body 2, and the locking member 61 can be moved between the release position and the locking position by moving the operation member. Even in that case, it is desirable to move the operation member by the cap 11.

1 Gas stopper with inspection hole 1A Gas stopper with inspection hole 2 Plug body 2a Valve accommodation hole (valve accommodation part)
2d Gas inflow hole 2e Gas outflow hole 2g Inspection hole 2h Protruding part 3 Valve body 4 Handle 6 Locking mechanism 11 Cap 61 Locking member 61b Locking piece (part of locking member; operation member)
63 Coil spring (biasing means)
64 Engaging recess (engaging part)

Claims (4)

Inside the valve housing part, a plug main body formed with a gas inflow hole, a gas outflow hole and an inspection hole respectively opened on the inner peripheral surface of the valve housing part, and between the closed position and the open position in the valve housing part A valve body rotatably accommodated, and a handle rotatably disposed outside the plug body and non-rotatably connected to the valve body, the valve body being closed by the handle and the closed position. In the gas stopper with an inspection hole, wherein the inspection hole communicates with at least one of the gas inflow hole and the gas outflow hole when positioned at a predetermined inspection position between the open position and
When the handle is located between the closed position and the inspection position, and between the inspection position and the open position, the handle is allowed to rotate between the plug body and the handle. When the handle is positioned at the inspection position, a locking mechanism for locking the handle to the plug body so as not to rotate is provided, and the plug body is locked by the locking mechanism. A gas stopper with an inspection hole, characterized in that an operation member for releasing the operation is provided so as to be operable from the outside of the plug body. The locking mechanism is provided on the stopper main body so as to be movable between an allowable position and a locking position, and biases the locking member from the allowable position toward the locking position. An urging means and an engaging portion provided on the handle, and the handle is located between the closed position and the inspection position and between the open position and the inspection position. When the locking member is positioned at the permissible position, the handle is allowed to rotate, and when the handle is positioned at the inspection position, the locking member is moved to the locking position by the biasing means. 2. The gas stopper with an inspection hole according to claim 1, wherein the handle is engaged with the engagement portion, whereby the handle is non-rotatably locked to the stopper body at the inspection position. The outer surface of the plug body is formed with a protruding portion where the inspection hole is opened at the distal end surface. A cap for closing the inspection hole is detachably attached to the protruding portion, and the cap is attached to the protruding portion. In the state where the locking member is moved to the permissible position via the operation member by the cap, the locking member is moved by the biasing means in the state where the cap is removed from the protruding portion. The gas stopper with an inspection hole according to claim 2, wherein the gas stopper is moved from the permissible position to the locking position. The locking member is disposed between the outer surface of the plug body and the inner surface of the handle, and a part of the locking member is exposed to the outside from between the plug body and the handle, and a part thereof The gas stopper with an inspection hole according to claim 2 or 3, which is also used as the operation member.

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