JP2006119016A - Connection tool for inspecting gas pressure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily detect defect of a valve element (23) in a connection tool for inspecting gas pressure of a type fitting and mounting a cylinder cap (1) opening only one hand during non-use by storing the valve element (23) opened and closed by attachment and detachment of a socket in a plug cylinder (21) in the connection tool for inspecting the gas pressure provided with the socket connection plug cylinder (21). <P>SOLUTION: The connection tool for inspecting the gas pressure is provided with a mutually rotating and retreating cylinder contrapositive zone (10) between the outer peripheral face of the plug cylinder (21) and the inner peripheral face of the plug cap (1). The cylinder contrapositive zone (10) is provided with a sealing means (25) for holding the inside of the plug cap (1) in a air-tight state. Before completing mounting of the plug cap (1), the air-tightness of the inside of the plug cap (1) is secured by the sealing means (25). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas pressure detection connector, and more particularly, to a gas pressure detection connector having a plug cylinder for connecting a socket and having a plug cap attached to the plug cylinder when not in use.

Japanese Patent Laid-Open No. 10-339384 has been proposed as a gas pressure detection connector. As shown in FIG. 5, this is provided with a gas stopper and a screw cylinder portion (30) screwed into a gas pipe. ) Is detachably connected to the plug cylinder (3). A gas passage (32) penetrating in the axial direction is formed in the gas pressure detecting connector, and a gas passage opening / closing mechanism such as a valve body (34) for opening and closing the gas passage (32) is formed in the gas passage (32). Is built-in. The valve body (34) opens when the socket is connected, and when the socket is removed, the valve body (34) is pushed by the urging force of a spring (35) built in the plug cylinder (3), and the plug cylinder (3) It is a mechanism that closes the open end of.
When the plug cylinder (3) is not used, a cylindrical plug cap (4) that covers substantially the entire plug cylinder (3) is detachably mounted.

A female screw portion (41) is formed on the inner peripheral surface near the open end of the plug cap (4), and this is a male screw formed on the outer peripheral surface near the base end portion of the plug cylinder (3). The plug cap (4) is externally fitted to the plug cylinder (3) in a screwed state by being screwed to the portion (31).
In this externally fitted state, an O-ring (33) is provided at the base end of the plug cylinder (3) in order to infiltrate rainwater into the plug cap (4) and to prevent dust. When the female screw portion (41) is screwed into the male screw portion (31) until reaching the final tightening position, the open end of the plug cap (4) reaches the base end portion of the plug cylinder (3). At the same time when the plug cap (4) is completely attached to the plug cylinder (3), the O-ring (33) is tightly fitted on the inner peripheral surface of the open end of the plug cap (4).
At the time of gas pressure detection, the plug cap (4) is rotated in the direction of loosening the screw connection with the plug cylinder (3). As a result, the plug cap (4) can be easily removed, and the pressure in the gas pipe or in the gas meter can be detected by connecting the socket of the pressure detection tool to the plug cylinder (3).
Japanese Patent Laid-Open No. 10-339384 Japanese Patent Laid-Open No. 10-122928

  However, with this conventional gas pressure detection connector, even if a gas leak occurs due to dirt or foreign matter adhering to the valve body (34) or a defect such as a scratch on the valve body (34), the gas passage opening / closing mechanism is abnormal. Cannot be easily detected. Therefore, even when a gas leak or the like is generated from the valve body (34), there is a problem that the plug cap (4) is screwed and connected to the plug cylinder (3) without noticing it. In this case, it is possible to prevent gas leakage by screwing the plug cap (4) onto the plug cylinder (3), but since the gas leakage from the valve body (34) is not noticed, safety is improved. It was lacking.

  The present invention has been made in view of such a point, and “a connecting device for gas pressure detection comprising a plug cylinder for connecting a socket, wherein the plug cylinder is opened and closed by attaching and detaching the socket. In the case of a gas pressure detecting / connecting device in which a cylindrical plug cap that is opened only on one side is externally fitted when not in use, the defect of the valve body can be easily detected. The task is to do.

(1) The gas pressure detection connector according to the first aspect of the present invention is as follows: “A cylindrical pair region that can rotate and advance / retreat between the outer peripheral surface of the plug cylinder and the inner peripheral surface of the plug cap is provided. Provided,
Sealing means for holding the inside of the plug cap in an airtight state is provided in the cylindrical pair area,
Airtightness in the plug cap is ensured by the sealing means before the plug cap is completely attached ”.
The above means operates as follows.
When the plug cap is fitted on the plug cylinder, a closed space is formed between the outer periphery of the plug cylinder and the inner periphery of the plug cap by the sealing means before the plug cap is completely installed. The When the plug cap is pushed into the plug cylinder while maintaining this state, if there is no abnormality in the valve body of the gas pressure detection connector, the closed space is reduced and the internal pressure rises. A pressing resistance in the opposite direction to the pushing operation is felt. On the other hand, when gas leaks due to foreign matter or the like adhering to the valve body, the pressure in the closed space does not increase and the operator does not feel the pressurizing resistance. Abnormalities in the body can be detected. Thus, the presence or absence of abnormality of the valve body of the gas pressure detection connector can be determined by whether or not a pressure resistance is felt during the work of attaching the plug cap. In this case, the cylindrical pair even region of the plug cap and the plug cylinder is a range in which the plug cap can be pushed into the plug cylinder, and the sealing means functions in this range.

(2) In claim 1, "the sealing means is an O-ring disposed on the outer peripheral surface of the plug cylinder,
In a predetermined range from the open end of the inner peripheral surface of the plug cap, a seal tube portion having an inner diameter substantially coinciding with the outer diameter of the O-ring is formed. ”When the plug cap is fitted over the plug tube, When the seal cylinder portion of the plug cap reaches the O-ring, a closed space is formed between the inner periphery of the plug cap and the outer periphery of the plug cylinder. From this point, when the plug cap is pushed toward the base end side of the plug cylinder, if there is no abnormality in the valve body, a pressure resistance is felt, and if there is an abnormality in the valve body, pressurization is performed. Since resistance is not felt, the presence or absence of abnormality of the valve body can be detected by the presence or absence of the pressure resistance. In this case, the cylindrical pair region of the plug cap and the plug cylinder is a range in which an O-ring disposed on the outer periphery of the plug cylinder is inscribed in the seal cylinder portion of the plug cap.

(3) In claim 2, "a male screw portion is formed on the outer peripheral surface closer to the tip of the plug cylinder than the O-ring arrangement position,
A female screw part that can be screwed into the male screw part is formed inward of the cylindrical pair of the plug cap,
The state where the open end portion of the plug cap is in contact with the tool corresponding portion provided at the base end portion of the plug cylinder by screwing the male screw portion and the female screw portion is the mounting completion state. If the plug cap is pushed into the plug cylinder, the O-ring comes into contact with the seal cylinder and the closed space is formed. When the plug cap is further pushed into the plug cylinder from here, when the valve body is abnormal, the pressure resistance is not felt, and when the valve body is normal, the pressure resistance is felt. . When there is no abnormality in the valve body, the plug cap is pushed in until the female screw portion hits the male screw portion, and then both screw portions are screwed together. A state where the open end portion of the plug cap is in contact with the tool corresponding portion of the plug cylinder is a mounting completion state. In this case, the cylindrical pair of the plug cap and the plug cylinder is within a range in which an O-ring disposed on the outer periphery of the plug cylinder is inscribed in the seal cylinder portion of the plug cap, and the male screw portion and the female screw portion are provided. This is the range until contact.

(4) In claim 3, in the case where “a small hole that communicates the inside and the outside of the plug cap is provided in the seal tube portion forming area of the plug cap” Can be confirmed by closing a small hole provided in the plug cap with a finger or an adhesive tape and pushing the plug cap into the plug cylinder. Further, when the plug cap is screwed and attached to the plug cylinder, if the plug cap is attached in a state where the small hole is opened, the plug cap is not subjected to a pressurizing resistance and can be smoothly attached. After the plug cap is attached, the small hole may be closed with a sealing member for waterproofing and dustproofing.

(5) In claim 4, in the case where “the small hole is provided on the open end side with respect to the position corresponding to the O-ring in the state where the plug cap is completely installed” This can be confirmed by closing a small hole provided in the plug cap with a finger or an adhesive tape and pushing the plug cap into the plug cylinder. In the state where the plug cap is completely attached to the plug cylinder, the small hole is located on the open end side from the contact position of the O-ring, and therefore it is not necessary to close the small hole.

As described above, according to the first aspect of the present invention, when the plug cap is mounted, whether or not the pressure resistance is felt, the abnormality or defect of the valve body in the plug cylinder is specially detected. It can be easily detected without using tools. Further, it is possible to easily detect an abnormality or a defect of the valve body in any state of being connected to the gas pipe or being handled as a product alone. Furthermore, even when the plug cap is removed, the abnormality of the valve element can be confirmed by the presence or absence of the suction force due to the reduced pressure when the plug cap is pulled out.
According to the second aspect of the present invention, since the cylindrical pair even region of the plug cap is set to a predetermined range from the open end of the plug cap, when the plug cap is attached, it is possible to first check the abnormality of the valve body.

According to the invention of claim 3, in addition to the above effect, the plug cap is configured to be screwed and connected to the plug cylinder. Therefore, even if a pressure resistance is generated in the plug cap before the plug cap is completely installed, The plug cap can be easily screwed onto the plug cylinder. The plug cap may be tightened until the open end abuts against the tool corresponding portion of the plug cylinder, and the installation completion time can be easily confirmed.
Further, according to the invention according to claim 4, it is particularly necessary to check the abnormality of the valve body, such as when confirming the presence or absence of abnormality of the valve body and when mounting the plug cap in product assembly or the like. You can use it differently.
According to the fifth aspect of the invention, when the plug cap is completely attached, the inside of the plug cap is secured by an O-ring, and can be waterproof and dustproof. Therefore, it is necessary to close the small hole provided in the plug cap. Absent.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a state in which a T-shaped pipe joint (51) is connected to a gas outlet (50) arranged in parallel with a gas inlet (not shown) on the upper surface of the gas meter (5). A gas pressure detection connector (2) is screwed to one of the two downstream ends (51a) of the mold pipe joint (51), and a water heater and various gases are connected to the other downstream end (51b). A pipe (52) for supplying gas to the appliance is connected.
The side to which the gas pressure detection connector (2) is connected is the front surface of the gas meter (5), and the pipe (52) is extended to the back side of the gas meter (5).
One end of the gas pressure detection connector (2) is a screw cylinder (20) screwed to the one downstream end (51a) of the T-shaped pipe joint (51), and the other end On the side, as shown by a two-dot chain line, a plug cylinder (21) to which a socket (40) of a pressure detecting tool (44) for inspecting gas leakage is detachably connected is integrally provided.

An abbreviation for allowing a tool to correspond to a boundary portion between the screw tube portion (20) and the plug tube (21) when the screw tube portion (20) is screwed and connected to the T-shaped pipe joint (51). The hexagonal tool-corresponding part (22) overhangs. As shown in FIGS. 2 and 3, an O-ring (on the outer peripheral surface of the plug cylinder (21) that is a predetermined distance away from the base end of the plug cylinder (21) corresponding to the tool corresponding section (22). 25) is provided in the circumferential direction, and a male screw portion (27) is provided in a predetermined range closer to the tip than the concave groove (26). It is engraved.
In the plug cylinder (21), the valve body (23) opened by the connection of the socket (40) and the valve body (23) abut against the valve seat (21a) in the plug cylinder (21). A valve device comprising a spring (24) biased in the contacting direction is provided, and the closed state is maintained by the valve body (23) unless the socket (40) is connected. However, in order to ensure higher safety, such as protection of the plug cylinder (21) and waterproofing inside the pipe, dust prevention, etc., when the plug cylinder (21) is not used, the plug cylinder (21) The plug cap (1) is externally fitted.
The plug cap (1) has a length that can cover the entire plug cylinder (21) and is open only at one end. FIG. 2 shows a plug cap according to an embodiment of the present invention ( FIG. 3 is an enlarged cross-sectional view of a main part when the abnormality of the valve body (23) is confirmed.
A predetermined range following the open end of the plug cap (1) is formed with a seal cylinder portion (10) having an inner diameter substantially matching the outer diameter of the O-ring (25) disposed in the groove portion (26). A female screw portion (12) that can be screwed into the male screw portion (27) of the plug cylinder (21) is formed on the back side.

When the plug cap (1) is externally fitted to the plug cylinder (21), as shown in FIG. 3, the female screw portion (12) of the plug cap (1) is connected to the gas pressure detection connector (2 ) Before the screw threaded portion (27) in the plug tube (21) is screwed, the seal tube portion (10) on the open end side of the plug cap (1) is inscribed in the O-ring (25). Is done. That is, as long as the inside of the gas pressure detection connector (2) is kept airtight by the valve body (23), the seal tube portion (10) of the plug cap (1) is pressed against the O-ring (25). When the state is touched, an airtight state in the plug cap (1) is secured.
In this embodiment, the female screw part (12) of the plug cap (1) is just screwed into the male screw part (27) of the plug cylinder (21), and the plug cap When the open end surface of (1) reaches the tool-corresponding portion (22) in a substantially contact state, the plug cap is completely attached. As shown in FIG. 3, the plug cap (1) is airtight. The distance (L1) from the open end surface of the plug cap (1) to the tool corresponding portion (22) at the time when the plug cap (1) is secured is the bottom inner surface (13 of the plug cap (1) from the open end of the plug tube (21). ) Or less (L2).

When the plug cap (1) is pushed into the plug tube (21) from the state of FIG. 3, the distance (L2) from the open end of the plug tube (21) to the bottom inner surface (13) of the plug cap (1) is increased. As the space is shortened, the closed space surrounded by the O-ring (25) provided on the outer periphery of the plug cylinder (21) and the inner surface of the plug cap (1) is reduced. In response to this, the operator feels pressure resistance. That is, it can be confirmed that there is no abnormality in the valve body (23) by feeling the pressure resistance.
The plug cap (1) is pushed into the plug cylinder (21) against the pressure resistance, the female screw portion (12) is screwed into the male screw portion (27), and the open end surface of the plug cap (1) is When it comes into contact with the tool corresponding portion (22), the mounting is completed.
When the valve body (23) is abnormal or defective, the pressing resistance as described above is not felt when the plug cap (1) is pushed in, and the pushing operation can be performed smoothly.
Thus, when the plug cap (1) is attached to the plug cylinder (21), it is possible to determine gas leakage from the gas pressure detection connector (2) based on whether or not pressure resistance is felt.

What is shown in FIG. 4 is an enlarged cross-sectional view of a main part showing a state at the time of abnormality confirmation of the valve body (23) of the gas pressure detection connector (2) of the second embodiment.
The seal tube portion (10) of the plug cap (1) of this embodiment is provided with a small hole (16) that communicates with the inside and outside of the plug cap. (16) is configured to be located closer to the open end than the contact position of the O-ring (25).
In this case, when confirming the presence or absence of abnormality of the valve body (23), the plug cap (1) is plug cylinder (in the state where the small hole (16) is closed with an appropriate sealing means such as a finger, adhesive tape, etc. 21) If there is no abnormality in the valve body (23), the closed space inside the O-ring (25) and the seal cylinder part (10) accommodated in the concave groove (26) of the plug cylinder (21) is reduced. Thus, the pressure resistance is felt, and if there is an abnormality, the pressure resistance is not felt. If there is no abnormality in the valve body (23), the seal of the small hole (16) is released, and when the screwing of the female screw part (12) and the male screw part (27) is advanced, a pressurized resistance is received. The plug cap (1) can be smoothly screwed in, and the open end of the plug cap (1) comes into contact with the tool corresponding portion (22), and the mounting of the plug cap (1) to the plug cylinder (21) is completed. In this mounted state, the small hole (16) is located closer to the open end of the plug cap (1) than the contact position of the O-ring (25), and rainwater and dust are plugged into the plug cap (1). There is no intrusion inside.
In each of the above embodiments, the plug cap (1) is attached to the plug cylinder (21) by screwing. However, if the plug cap (1) does not easily fall off, the plug cap (1) and the plug cylinder (21) are not necessarily screwed together.

Explanatory drawing which shows the mounting completion state of the plug cap to the plug cylinder of the connector for gas pressure detection of 1st Embodiment. The principal part expanded sectional view of FIG. The principal part expanded sectional view which shows the mode at the time of abnormality confirmation of the valve body of the connector for gas pressure detection of 1st Embodiment. The principal part expanded sectional view which shows the state which attached the plug cap to the connector for gas pressure detection of 2nd Embodiment of this invention. Sectional drawing of the connection tool for the conventional gas pressure detection.

Explanation of symbols

(1) ・ ・ ・ ・ Plug cap
(16) ... Small hole
(2) ・ ・ ・ ・ Connector for gas pressure detection
(21) ・ ・ ・ ・ Plug cylinder
(23) ・ ・ ・ ・ Valve
(25) ... Sealing means (O-ring)

Claims (5)

A connecting device for gas pressure detection comprising a plug cylinder for socket connection, wherein the plug cylinder contains a valve element that opens and closes when the socket is detached, and opens only to one when not in use. In the connector for gas pressure detection of the type in which the tubular plug cap is fitted on the outside,
Between the outer peripheral surface of the plug cylinder and the inner peripheral surface of the plug cap, a cylindrical paired area capable of rotating and reciprocating is provided.
Sealing means for holding the inside of the plug cap in an airtight state is provided in the cylindrical pair area,
The gas pressure detection connector according to claim 1, wherein the sealing means ensures airtightness before the plug cap is completely attached. The gas pressure detection connector according to claim 1, wherein the sealing means is an O-ring disposed on an outer peripheral surface of the plug cylinder,
A gas pressure detection connector according to claim 1, wherein a seal cylinder portion having an inner diameter substantially coinciding with the outer diameter of the O-ring is formed in a predetermined range from the open end of the inner peripheral surface of the plug cap. In the gas pressure detection connector according to claim 2, a male screw portion is formed on an outer peripheral surface closer to a tip of the plug cylinder than the O-ring arrangement position.
A female screw part that can be screwed into the male screw part is formed inward of the seal cylinder part of the plug cap,
When the male screw portion and the female screw portion are screwed together, a state in which the open end portion of the plug cap is in contact with a tool corresponding portion provided at a base end portion of the plug cylinder is set as a mounting completion state. Gas pressure detection connector.   The gas pressure detection connector according to claim 2 or 3, wherein a small hole for communicating the inside and the outside of the plug cap is provided in the seal tube portion forming region of the plug cap. Pressure connector.   5. The gas pressure detection connector according to claim 4, wherein the small hole is provided closer to the open end than the position corresponding to the O-ring when the plug cap is completely attached. Connection tool.

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