JP6501662B2 - Flow path structure of gas plug with inspection port - Google Patents

Description

  The present invention relates to a flow path structure of a gas plug, and more particularly, to a flow path structure of a gas port with an inspection port provided with an inspection port for measuring gas pressure.

As shown in FIG. 5, as a gas plug with an inspection port, turn the pin (4) to the center of the linear gas flow path (30) provided with the gas pipe connection parts (33) and (34) at both ends A so-called intermediate cock type in which a nozzle housing portion (32) which can be accommodated freely is provided and an inspection port (31) for gas pressure inspection is provided so as to be in communication with the nozzle housing portion (32). Japanese Patent No. 3047218 discloses a gas plug body (3).
In this case, a linear passage hole (40) communicating with the gas flow passage (30) penetrates through the cylinder (4) housed in the cylinder housing portion (32) and is communicated with it at a right angle And the auxiliary hole for pressure detection (41) opened to the inspection port (31) is cut, and the passage hole (40) and the auxiliary hole (41) form a T-shaped flow path structure.
FIG. 5 (A) is a plan view of this kind of gas plug body (3), and (B) to (D) are for the gas plug body (3) in the direction shown in (A). It is a schematic explanatory drawing which shows the state which rotated the stem (4).

During normal use, the inspection port (31) has a structure to which no gas pressure is applied and is closed by the screw plug (35), so that no gas leak occurs.
At the time of purge or pressure detection, the rubber tube of the pressure measuring device is connected to the inspection port (31) from which the screw plug (35) is removed, and the gas flow path (30) and the inspection port (31) The pressure in the gas flow path (30) can be detected by rotating the socket (4) within the socket (32) by a predetermined angle so as to be communicated via the auxiliary hole (41).

(A) and (B) of FIG. 5 show the fully closed state of the gas plug in which the gas flow path (30) of the gas plug body (3) is closed by the plug (4). The formed passage hole (40) is not open to the gas flow path (30) of the gas plug body (3).
When the control knob (42) provided above the gas plug body (3) is turned downward 90 degrees counterclockwise from this fully closed state, the chip (4) 32) A gas which is rotated in the same direction as the operation knob (42) inside, and as shown in (C) of the same figure, a gas in which the passage hole (40) of the socket (4) communicates with the gas passage (30) The flow path (30) is fully open. At this time, since the auxiliary hole (41) is located in the opposite direction to the inspection port (31), no gas flows into the inspection port (31).

Then, when the operation knob (42) is turned 90 degrees clockwise from the state of FIG. 6C, the gas plug returns to the fully closed state shown in FIG.
Note that a lock mechanism (not shown) is provided to prevent further rotation when the socket (4) is rotated 90 degrees clockwise or counterclockwise. In use, the pin (4) can not be rotated more than 90 degrees in either direction.

And when performing purge or pressure detection, remove the screw plug (35) of the inspection port (31) in the fully closed state shown in (B) of the above-mentioned figure, and perform pressure detection on the inspection port (31) Connect the rubber tube of the device.
Thereafter, the lock mechanism is released, and the socket (4) is rotated 90 degrees clockwise from the state of (B), and the auxiliary hole (41) coincides with the pressure detection port (31) (D) Put in a state. This enables purge or pressure detection in a state in which the upstream side and the downstream side of the gas port with an inspection port are in communication.

Patent 3047218 gazette

However, in this conventional one, the relationship between the formation position of the inspection port (31) in the gas plug body (3) and the formation position of the passage hole (40) and the auxiliary hole (41) in the furnace (4), From the relationship with the rotation direction of the operation knob (42) and the clamp (4) during normal use and at the time of purge or pressure inspection, the inspection port (31) is in the opposite direction of the state of (A) ), And the installation location of the gas plug is limited.
Further, in this device, in the fully closed state shown in (B), the inspection port (31) is downstream of the gas flow passage (30) through the passage hole (40) and the auxiliary hole (41) of the notch (4). Since it is in communication with the side, if the screw plug (35) is loosened or carelessly detached, foreign matter such as rain water or dust will pass through the gas passage (30) through the inspection hole (31). There is a risk of infiltration.

  The present invention has been made in view of such a point, and “a gas flow passage opened to the upstream side and a downstream side, a crack accommodating portion in which the crack which opens and closes the gas flow passage is rotatably accommodated, The operation knob for turning the chip is rotatably mounted on the gas plug main body having an inspection port in communication with the part and to which the gas pressure inspection tool is connected, and the rotation range of the operation knob is In the flow path structure of the gas port with an inspection port restricted to the opening and closing operation area during normal use of the flow path, it is possible to change the formation position of the inspection port in the gas plug body according to the installation environment It is an object of the present invention to prevent communication between the gas flow passage and the inspection port in the opening / closing operation area during normal use by the operation knob.

The technical means of the present invention for solving the above-mentioned subject matter “seal has a sliding portion for closing the gas flow path, and a passage hole which penetrates linearly and opens on both sides of the sliding portion.
The inspection port shifts parallel to the center line from the center line of the passage hole in the fully closed state of the gas passage where the passage hole is positioned at right angles to the gas passage. Provided at the
In the opening and closing operation area during normal use of the operation knob, when the gun is rotated from the fully closed state to the fully open state of the gas flow path whose passage hole is coaxial with the gas flow path, the gas passing hole is Prior to communication with the upstream side of the flow path, when the inspection port is closed by the slide part of the plug and the plug is rotated from the fully open state to the fully closed state, the test port is communicated with the through hole of the plug First, the upstream side of the gas flow path is set to be closed by the sliding part of the socket,
When the control knob is turned beyond the open / close operation area by releasing the restriction, one open end of the passage hole simultaneously communicates with the inspection port and the gas flow passage closer to the inspection port, and the other opening is opened. The end communicates with the gas flow path on the side far from the inspection port.

The above technical means work as follows.
Since the gas flow path is closed by the sliding part of the gas plug in the fully closed state of the gas plug located at a right angle to the gas flow path of the gas plug body, the inspection port and the gas flow The passages do not communicate.
The gas flow path communicates from the upstream side to the downstream side through the passage hole in the fully open state of the gas plug whose coaxial passage hole is positioned with respect to the gas flow path, but the inspection port slides It is in the state of being blocked by the department.

  In normal use, the open / close operation area of the operation knob is restricted only to a certain range between the fully closed state and the fully open state, and the operation knob is pivoted from the fully closed state to the fully open state. Also, even if it is turned from the fully open state to the fully closed state, the gas flow path and the inspection port do not communicate with each other through the passage hole of the chip.

  Then, when the regulation is released and the operation knob is rotated beyond the above-described normal use rotation range, the inspection port, the gas flow path, and the passage hole of the mark are simultaneously communicated. It is set.

In the flow path structure of the gas plug with the inspection opening described above, “the rotation of the operation knob is restricted by the lock means to the opening / closing operation area during normal use;
By releasing the locking means, the operation knob can be turned to the inspection / purge area beyond the open / close operation area,
In this inspection / purge zone, one open end of the passage hole opens simultaneously to one of the upstream and downstream ends of the gas flow passage and the inspection port, and the other open end opens to the other of the upstream and downstream ends of the gas flow passage It is desirable to set it to
As the lock means, any means may be used as long as it prevents the operation knob from rotating beyond the opening / closing operation area, and it is possible to adopt one that can be easily released as needed. If the locking means is released, the chip can be rotated to the inspection / purge area, the inspection tool is attached to the inspection port, and the gas flow path of the gas plug body, the inspection port, and the passage hole of the chip are all in communication. It is possible to perform pressure detection and purge.

In the flow channel structure of the gas plug with the inspection port described above, “the diameter of the passage hole is substantially matched to the diameter of the gas flow channel,
The inspection port is preferably provided in communication with the vicinity of an end edge located upstream or downstream of one open end of the passage hole in the fully closed state.
In this case, by setting the diameter of the passage hole to a size substantially matching the diameter of the gas passage, the passage hole is formed in both the gas passage and the inspection port at one open end of the passage hole. It can be made to communicate simultaneously. Further, for example, in the case where the inspection port communicates with the vicinity of the end edge located on the upstream side of one open end of the passage hole in the fully closed state, the operation knob in the fully closed state is counterclockwise By pivoting to the position, the inspection port can be closed by the sliding portion continuous with the end edge.

  In the flow path structure of the gas plug with the inspection port described above, “when the inspection port is projected on the right side surface of the nozzle accommodation portion when viewed from the upstream side of the gas flow path, the configuration is provided closer to the upstream side of the gas flow path In the case where the gas flow path is provided on the left side of the gas storage portion as viewed from the upstream side of the gas flow path, the gas flow path is provided closer to the downstream side. The operation knob can be turned 90 degrees counterclockwise from the fully closed state to make it fully open without communication between the inspection port and the gas flow path, and the operation knob can be turned 90 degrees clockwise from the fully open state It can be made fully closed.

In the flow path structure of the gas port with the inspection port described above, it is preferable that “the inspection port is removably closed by a screw plug”.
At the time of normal use, the inspection port is closed by a screw plug, and at the time of purge or pressure detection, the screw plug may be removed and a test pressure tool may be connected to the inspection port.

In normal use, both in the fully open state and in the fully closed state of the gas plug, furthermore, when the operating knob is pivoted in the opening direction from the fully closed state to the fully open state, and vice versa Since the inspection port and the gas flow path are not communicated even when the sensor is turned to the lower side, no gas pressure is applied to the inspection port, and the safety is high. Also, even if rain water, dust, dirt, etc. may enter the inspection port, it is also possible to prevent such foreign matter from invading the gas flow path on the downstream side of the gas plug through the passage hole. it can. In particular, if the inspection port is closed with a screw plug, it is possible to reliably prevent the foreign matter from invading the gas flow path.
In addition, since only one straight passage hole is made to pass through the hole, and there is no need to form an auxiliary hole for the inspection port in addition to the passage hole as in the conventional case, It can be simplified and the manufacture of the resin is easy and inexpensive.
Further, the inspection port can be provided on either side of the left and right sides of the plug housing portion of the gas plug main body to exert the above-mentioned effects. Therefore, the inspection port is used as a gas plug provided on the right side of the gas plug main body. Alternatively, it can be used as a gas plug provided on the left side, and can be used properly depending on the environment around the gas plug. As described above, since the formation position of the inspection port is not limited, it is possible to provide a convenient gas plug.

It is a disassembled perspective view of the gas port with an inspection port of a 1st embodiment of the present invention. It is explanatory drawing of the latching board employ | adopted as the flow-path structure of the gas port with a test | inspection opening of the 1st embodiment of this invention. It is a sectional view showing the relation between the gas channel of the channel structure of the gas plug with an inspection port of a 1st embodiment of the present invention, the inspection port, and the passage hole of a chip, and (A) is at the time of usual use. (B) shows a state in the middle of turning from the fully closed state to the fully open state, (C) shows the fully open state, and (D) shows a state at the time of purge or pressure detection. It is a sectional view showing the relation between the gas channel of the channel structure of the gas plug with an inspection port of a 2nd embodiment of the present invention, the inspection port, and the passage hole of a chip, (A) is a fully closed state, (B) shows a state during rotation from the fully closed state to the fully open state, (C) shows the fully open state, and (D) shows a state at the time of purge or pressure detection. (A) is a plan view of a conventional gas plug, (B) shows a fully closed state in normal use, (C) shows a fully open state, and (D) shows a state at the time of purge or pressure detection.

Hereinafter, modes for carrying out the present invention will be described in detail with reference to the drawings.
The gas port with an inspection port of this embodiment, as shown in FIG. 1, is a so-called intermediate cock provided with screw portions (1a) and (1b) for gas pipe connection at both ends, and the gas pipe connection on the upstream side A straight gas flow passage (10) is formed from the threaded portion (1a) to the downstream threaded portion (1b).
In the central portion of the gas flow passage (10), a socket housing portion (11) for rotatably housing the socket (2) is provided, and of the trunk portion of the cylinder housing portion (11), the upstream side The pressure detection port (12) consisting of a screw cylinder is projected so as to be positioned at right angles to the gas flow path (10) on the right side and on the upstream side as viewed from the gas pipe connection screw (1a) side It is set up.

In addition, when the pressure detection port (12) is not in use, the screw plug (13) is screwed into the open end to close it.
The screw plug (13) has a shape in which a screw shaft screwed from the head to the inspection port (12) is continuous, and an annular packing is externally fitted to the base end of the screw shaft, although not shown. When the screw shaft of the screw plug (13) is screwed into the pressure detection port (12), the packing is held between the head and the end face of the pressure detection port (12) and sealed.

A cylindrical portion (1c) is continuously provided above the flash housing portion (11), and an annular engagement groove (14) is formed on the inner peripheral surface of a predetermined depth from the open end of the cylindrical portion. A pair of fitting portions (15) (15) of a fixed width are formed deeper than the engaging groove (14) on one diameter line of the engaging groove (14).
The cylindrical portion (1c) is cut out above the engagement groove (14) over a range of 90 degrees from one of the fitting portions (15) to form a cutout area (16).

  The gas passage (2) has a tapered sliding portion (21) corresponding to the inner surface shape of the nozzle housing portion (11), and linearly penetrates the sliding portion (21). A passage hole (20) having a diameter substantially corresponding to the diameter of 10) is formed. An operating shaft (22) having an angular shaft portion (23) is protrusively provided at the upper end of the flash (2), and the angular shaft portion (23) engages with the clutch plate (5) in a diagonally coupled even state The clutch plate (5) is integrally rotatable with the socket (2).

A cutting shaft (52) having a parallel surface portion, in which both opposing surfaces are cut in parallel, protrudes from the upper end of the disk portion (51) constituting the clutch plate (5). In the above, a notch (50) is formed so as to open in a direction perpendicular to one surface of the parallel surface portion. In addition, a pin (55) is provided on the upper surface of the disc portion (51) at a predetermined angle away from the notch portion (50).
Further, a stopper ring (53) externally fitted to the operation shaft (20) of the groove (2) is disposed below the clutch plate (5), and an upright piece provided on the stopper ring (53) (54) is fitted in the notch (50) of the clutch plate (5) so as to project upward. In the upper surface of the disk portion (51), the pin (55) protrudes higher than the upright piece (54).
A spring (24) is interposed between the stopper ring (53) and the upper end surface of the socket (2).

  The locking plate (6) is placed on the upper surface of the disc portion (51) of the clutch plate (5). As shown in FIGS. 1 and 2, the locking plate (6) has a shape in which the pair of projecting tongues (60) (60) project outward from the diameter line from the annular main body, and The opening is composed of three types of first to third circular arcs (61) (62) (63) having different diameters.

  In the gas plug with an inspection port of this type, the plug (2) is housed in the plug housing portion (11) of the gas plug body (1), and the spring (24) is externally fitted to the operating shaft (22) from above The stopper ring (53) and the clutch plate (5) are mounted above this, and the locking plate (6) is placed on the upper surface of the disc portion (51) of the clutch plate (5). Thereafter, they are pushed downward, and fitting portions (15) (15) are provided with the projecting tongues (60) (60) of the locking plate (6) in the cylindrical portion (1c) of the gas plug body (1). When the C-shaped locking ring (25) is fitted in the engaging groove (14), these parts are fitted in the gas plug body (1) in a retaining state. In this state, the clutch plate (5) and the stopper ring (53) are urged in the upward direction by the spring (24), and are fixed to the cylindrical portion (1c) of the gas plug body (1) in a detent manner. And an upright piece (54) of a stopper ring (53) protruding upward from the notch (50) of the clutch plate (5) to a first arc portion (61) of the locking plate (6). The pin (55) protrudes into the portion (62).

  Then, the control knob (7) is fitted and fixed to the cut shaft (52) of the clutch plate (5) in the relative rotation prevention state. The longitudinal direction of the knob portion (71) raised linearly on the upper surface of the operation knob (7) is set to coincide with the flow path of the passage hole (20) of the bar (2).

The L-shaped movable claw (70) is incorporated in the operation knob (7) in a state of being biased outward, and the movable claw is assembled when the operation knob (7) is assembled to the gas plug body (1). (70) is movable in the cutout area (16) of the cylindrical portion (1c).
In the fully closed state of the gas flow passage (10) shown in FIG. 3A, the movable claw (70) is in contact with one side wall (17) of the notch area (16), and the operation knob (7) ) Can not be rotated further clockwise. In this state, the upright piece (54) of the stopper ring (53) fitted in the notch (50) of the clutch plate (5) is fixed in the tubular portion (1c) as shown in FIG. The operation knob (7) is also turned counterclockwise because it is in the state of abutting in the counterclockwise direction on one end edge (64) of the first arc (61) of the locking plate (6) I can not move it.

Then, the control knob (7) is pushed along with the clutch plate (5) and the stopper ring (53) by a fixed stroke to engage the upright piece (54) with one end edge (64) of the locking plate (6). Let it go. Thus, the operation knob (7) can be rotated counterclockwise, and the operation knob (7) is rotated 90 degrees counterclockwise to move the movable claw (70) to the other of the cylindrical portion (1c). The state in which the pin (55) is in contact with the end edge (65) of the second arc (62) of the locking plate (6) simultaneously with the contact with the side wall (18) of FIG. In the fully open state of the gas flow path (10) shown, the operation knob (7) can not rotate any more.
That is, in this embodiment, the counterclockwise direction is the turning direction of the socket (2) when the gas channel (10) is fully opened from the fully closed state, and the clockwise direction is the gas channel (10). Direction of the pin (2) when changing the fully open state from the fully open state).

That is, in normal use, the operation knob (7) is rotatable within a range of 90 degrees corresponding to the cutaway area (16) of the cylindrical portion (1c), and the movable claw (70) and both sides The relationship between the wall (17) and (18) and the relationship between the upright piece (54) of the stopper ring (53) and the one end (64) of the locking plate (6) is the range of rotation of the operation knob (7) Function as a locking means to regulate
In addition, when performing pressure detection or purge, in the fully closed state, the movable claw (70) is forcibly pushed into the back of the operation knob (7) to move the movable claw (70) and the cylinder portion (1c). Release contact with one edge (17) of the Then, the operation knob (7) can be further rotated clockwise from the fully closed state, and as shown in FIG. 2, the pin (55) is of the first arc (61) of the locking plate (6). When it abuts on the other edge (66) further pivoting is prevented. This state is the pressure detection / purge state shown in FIG.

  Next, the flow path structure in the fully closed state of the spark plug (2), the fully closed state to the fully open state, the fully open state, and the pressure detection / purge state will be described.

In the fully closed state, as shown in FIG. 3A, the passage hole (20) of the drill (2) is positioned at right angles to the gas flow passage (10) of the gas plug body (1). The gas flow path (10) is blocked by the sliding surface (21) of the socket (2) and the flow of gas is shut off. In the fully closed state, a part of one open end (201) of the passage hole (20) communicates with the inspection port (12).
From this state, turning the operation knob (7) counterclockwise as described above allows the pin (2) to be turned in the same direction, and the pin (2) can be fully opened. it can.

In the fully closed state of (A) of FIG. 3, from the end edge (20 a) of the passage hole (20) located on the most upstream side of one open end (201) opened to the inspection port (12) side, The length of the arc leading to the downstream end (12a) of the open end of the inspection port (12) opened to the flash storage portion (11) is the length of the other open end (20 From the edge (20b) located on the most upstream side of 202), the open edge of the gas flow path (10) opened to the upstream side of the socket (11) is located far from the inspection port (12) It is set shorter than the length of the arc reaching the end edge (10a). As a result, when the operation knob (7) is rotated in the counterclockwise direction together with the socket (2) in the above-described manner from the fully closed state shown in (A) of FIG. As such, the end (20b) of the other open end (202) of the passage hole (20) reaches one open end (201) before reaching the end (10a) of the gas channel (10). End (20a) reaches the downstream end (12a) of the inspection opening (12), and the inspection opening (12) continues to the end (20a) of one open end (201). It will be closed by the moving part (21). Therefore, the gas flow path (10) on the upstream side of the nozzle accommodating portion (11) and the inspection port (12) do not communicate with each other through the passage hole (20).
If the operation knob (7) is turned 90 degrees while maintaining this state, the fully open state shown in FIG. 3C can be obtained.

Also, in the fully open state of FIG. 6C, the length of the arc extending from the end (20b) of the passage hole (20) to the end (10a) of the gas passage (10) The edge (20a) of 20) is set shorter than the length of a circular arc leading to the edge (12a) of the inspection port (12). As a result, the end edge (20a) of the passage hole (20) is beyond the edge (12a) of the inspection port (12) and the gas is transmitted before the inspection port (12) communicates with the passage hole (20). Since the flow path (10) is closed by the sliding portion (21) following the edge (20b) of the passage hole (20), the gas flow path (10) on the upstream side of the nozzle accommodating portion (11) ) And the inspection port (12) do not communicate via the passage hole (20).
As described above, in the opening / closing operation area of the operation knob (7) at the time of normal use, when rotating the socket (2) 90 degrees clockwise and counterclockwise, the inspection port (12) is a gas It does not communicate with the flow path (10).

At the time of purge or pressure detection, the screw plug (13) is removed from the inspection port (12), and the rubber tube of the pressure detection device is connected to the open end of the inspection port (12).
Then, the lock means by the movable claw (70) of the operation knob (7) and one side wall (17) is released in the above manner, and the operation knob (7) is further watched from the state of FIG. Rotate in the direction. When it is turned about 45 degrees, as shown in FIG. 2, the pin (55) provided on the clutch plate (5) comes in contact with the other end edge (66) of the first arc (61). Rotation of the operation knob (7) is prevented. In this state, the socket (2) is in the state of (D) in FIG. 3, and one open end (201) of the passage hole (20) of the socket (2) is the socket housing part (11) The gas flow path (10) on the more upstream side and the inspection port (12) are simultaneously opened, and the other open end (202) is opened to the gas flow path (10) on the downstream side of the nozzle accommodating portion (11).
As described above, all of the gas flow path (10) of the gas plug body (1), the inspection port (12) and the chip (2) can be communicated with each other, and a pressure detection / purge state can be established.

FIG. 4 is a cross-sectional view showing another embodiment of the gas plug body (1), wherein the inspection port (12) is the left side surface of the plug housing portion (11), and the gas flow path (10 Provided on the downstream side of
Also in the case of this embodiment, in normal use, the socket (2) can be rotated counterclockwise from the fully closed state shown in (A) of the same figure (C) of the same figure. Can be fully open as shown in FIG.

  In this embodiment, in the fully closed state shown in FIG. 4A, a part of the other open end (202) of the passage hole (20) communicates with the inspection hole (12), and the other side The most upstream end (12b) of the open end of the inspection port (12) opened from the most downstream end (20c) of the open end (202) to the socket (11) The gas flow path which opens the length of the circular arc leading to the upstream side of the end (20b) of the other open end (202) of the passage hole (20) from the end (20b) located upstream Of the open edge of (10), the length is set to be shorter than the length of the arc extending to the edge (10a) close to the inspection opening (12). Thereby, when the operation knob (7) is rotated counterclockwise together with the socket (2) in the above-described manner from the fully closed state shown in (A) of FIG. As shown, before the edge (20b) of the other open end (202) of the passage hole (20) reaches the edge (10a) of the gas channel (10), the other open end The edge (20c) of (202) reaches the upstream edge (12b) of the inspection port (12), and the inspection port (12) is continuous with the other edge (20c) of the open end (202) Closed by the sliding portion (21).

Also, in the fully open state of FIG. 6C, the length of the arc from the edge (20b) of the passage hole (20) to the edge (10a) of the gas passage (10) The inspection port (12) communicates with the passage hole (20) by setting the end edge (20c) of 20) to be shorter than the length of the arc reaching the end edge (12b) of the inspection port (12) Since the gas flow path (10) is closed earlier, the gas flow path (10) on the upstream side of the nozzle housing portion (11) and the inspection port (12) communicate via the passage hole (20). There is nothing to do.
As described above, also in the configuration where the inspection port (12) is provided on the left side surface of the clamp housing portion (11), the operation knob (7) is rotated 90 degrees clockwise and counterclockwise in normal use. Thus, the gas flow path (10) can be opened and closed, and the inspection port (12) does not communicate with the gas flow path (10) in the open and closed area.

  At the time of purge or pressure detection, the lock means is released, and the operation knob (7) is further rotated clockwise from the state of (A) of FIG. 4 to be in the state of (D) of FIG. In this state, one open end (201) of the passage hole (20) of the socket (2) is in communication with the gas flow passage (10) on the upstream side of the 202) can be brought into the pressure detection / purge state by simultaneously opening the gas flow path (10) and the inspection port (12) on the downstream side of the spark receptacle (11).

As described above, even if the inspection port (12) is provided on the right side surface of the gas plug body (1) or on the left side surface, the operation knob (7) in the opening / closing operation area during normal use By rotating the counterclockwise, the socket (2) can be pivoted from the fully closed state to the fully open state, and by pivoting it clockwise, the socket (2) can be fully closed from the fully open state. It is possible to provide an easy-to-use gas plug in which the inspection port (12) and the gas passage (10) do not communicate with each other in this normal use rotation area. . In addition, by releasing the lock means, the inspection port (12) can be communicated with the gas flow path (10) by turning it also in the purge / inspection area.
Since only one passage hole (20) is made to penetrate the above-mentioned chip (2), the manufacturing process can be simplified as compared with the conventional chip shown in FIG.
In addition, about the release of the locking means to the purge and inspection area, the lock is fully opened by changing the positions of the first to third arcs (61), (62) and (63) of the locking plate (6). Alternatively, the knob may be pivoted counterclockwise.

(1) ..... ... gas plug body
(10) ........... Gas flow path
(11).
(12) ... ... ... inspection port
(2) .........
(20) ... ... ... passage hole
(21) ·········· Slider
(7) ........... Operation knob

Claims (5)

A gas passage opened to the upstream side and the downstream side, a cylinder accommodating portion rotatably accommodated with a cylinder for opening and closing the gas passage, and an inspection port communicating with the cylinder accommodating portion and connected with a gas pressure inspection tool An operation knob for pivoting the socket is rotatably mounted on the gas plug main body, and the pivoting range of the operation knob is restricted to an open / close operation area during normal use of the gas flow path. In the flow path structure of the gas valve with the inspection port,
The flash has a sliding portion that blocks the gas flow path, and a passage hole that penetrates linearly and opens on both sides of the sliding portion.
The inspection port shifts parallel to the center line from the center line of the passage hole in the fully closed state of the gas passage where the passage hole is positioned at right angles to the gas passage. Provided at the
In the opening and closing operation area during normal use of the operation knob, when the gun is rotated from the fully closed state to the fully open state of the gas flow path whose passage hole is coaxial with the gas flow path, the gas passing hole is Prior to communication with the upstream side of the flow path, when the inspection port is closed by the slide part of the plug and the plug is rotated from the fully open state to the fully closed state, the test port is communicated with the through hole of the plug First, the upstream side of the gas flow path is set to be closed by the sliding part of the socket,
When the control knob is turned beyond the open / close operation area by releasing the restriction, one open end of the passage hole simultaneously communicates with the inspection port and the gas flow passage closer to the inspection port, and the other opening is opened. The end is a flow path structure of the gas port with an inspection port communicating with the gas flow path on the side far from the inspection port. In the flow passage structure of the gas port with an inspection port according to claim 1,
The rotation of the operation knob is restricted by the lock means to an open / close operation area during normal use,
By releasing the locking means, the operation knob can be turned to the inspection / purge area beyond the open / close operation area,
In this inspection / purge zone, one open end of the passage hole opens simultaneously to one of the upstream and downstream ends of the gas flow passage and the inspection port, and the other open end opens to the other of the upstream and downstream ends of the gas flow passage The flow path structure of the gas port with the inspection port set to be. In the flow passage structure of the gas port with an inspection port according to claim 1 or 2,
The bore diameter of the passage hole is substantially matched to the bore diameter of the gas flow path,
The flow path structure of a gas port with an inspection port provided so as to communicate with the vicinity of an end edge located upstream or downstream of one open end of the passage hole in the fully closed state. In the flow passage structure of the gas port with an inspection port according to any one of claims 1 to 3,
The inspection port is provided on the upstream side of the gas flow passage when protruding from the upstream side of the gas flow passage on the right side surface of the nozzle accommodation portion, and the inspection storage is seen from the upstream side of the gas flow passage A flow path structure of a gas plug with an inspection port, which is provided on the downstream side of the gas flow path when protruding on the left side surface of the part.   The flow path structure of the gas port with an inspection port according to any one of claims 1 to 4, wherein the inspection port is a plug structure of the gas port with an inspection port which is removably closed by a screw plug.

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