KR100673295B1 - Pipe connector - Google Patents

Abstract

According to the present invention, the separation is performed at a predetermined load or more, and the internal pressure of the gas does not separate, and the gas in the filling hose is not ejected after separation, and moreover, the emergency escape without the escape plug is caused by the gas pressure during separation. Provide pipe joints.

To this end, the present invention is configured as a socket (3) having a fixed plug (2) attached to the pipe joint body (1), and a breakaway plug (4) inserted into the pipe joint body (1), is separated from the socket (3) When the plug 4 is inserted, the shutoff valves 18 and 32 provided at the fixed plug 2 and the release plug 4 are opened. When the release plug 4 is removed from the socket 3, the shutoff valves 18 and 32 are opened. In the emergency escape pipe joint to be closed,

Grooves 12 and 42 are formed on the inner wall surface of the pipe joint body 1 and the outer wall surface of the release plug 4, and the elastic rings 11 inserted into the grooves 12 of the pipe joint body 1 are separated. The release plug 4 is engaged with the groove 42 of the plug 4 so as to be detachable from the pipe joint body 1.

Emergency release pipe joint, pipe joint body, fixed plug, release plug

Description

Emergency escape pipe joint {Pipe connector}

1 is a cross-sectional view of the emergency escape pipe joint of the present invention

2 is a plan view of the elastic ring

3 is a cross-sectional view of a state in which the shutoff valve is closed at the initial release of the emergency escape pipe joint;

4 and 5 are cross-sectional views of the state in which the separation is performed again and gas is removed from the flow path.

6 is a cross-sectional view of the escape state of the emergency escape pipe joint

※ Explanation of code for main part of drawing

1: pipe joint body 2: fixed plug

3: socket 4: release plug

5: inflow path 6: outflow path

7: Euro 8: Bolt

9,28: screw 10: cutout

11: elastic ring 12,42: groove

13,14,15,16: hole 17,31: plug body

18,32: Shut-off valve 19,20,33,34: Between valves

21,34a: Valve guide: 22,35: Nut

23,36: valve chamber 24,37: spring

25,38: valve seat 26,27: outflow

29,43: Mounting nut 30,44: Hole

39,40 Inflow 41: Taper

45: pin OR: O-ring

The present invention relates to an emergency escape pipe joint used in a high pressure gas filling device such as hydrogen gas, natural gas.

In the high pressure gas filling device, gas filling is performed by connecting a filling nozzle to a fuel tank of an automobile. For this reason, when the vehicle moves during filling and the filling hose is pulled, equipment such as the filling nozzle and the filling hose is damaged, and the gas is ejected to a dangerous state. Thus, the emergency release seam that separates when a certain tensile load is applied is provided in the middle of the filling device and the filling nozzle to prevent the risk of damage to the device.

Such emergency escape pipe joints include (1) a structure that is separated under a certain load, (2) a structure that does not separate with the internal pressure of the gas, (3) a structure in which no gas is released in the filling hose after separation, and (4) It is required to have a structure in which the escape plug does not protrude due to gas pressure.

Conventionally, as an emergency release pipe joint separated at a predetermined load or more, when the coil spring is compressed and contracted by the tension load, the constraint by the sphere is released to separate the separation (see Patent Documents 1 and 2) and the tension load. It is known that the locking pin is broken and the locking by the sphere is released and separated (see Patent Document 3).

However, since the coil spring increases the load as it is compressed, the separation load also increases, making it difficult to reflect in the design of the emergency release pipe joint to be separated at a constant load. In addition, the shear pin is difficult to be reflected in the design of the emergency release pipe joint, which must be separated at a constant load, because the shear load is changed due to fatigue phenomena due to the thickness, material, and repeated load of the wire. There is no problem. In addition, the method of releasing the latch by a sphere (iron bead) may cause the sphere to spoil the pipe joint during separation, or the sphere may spring out after separation and be lost. Therefore, it is difficult to reuse at this time. As another prior art, an emergency escape pipe joint which is not separated by internal pressure of gas is provided with a gas flow path formed at right angles to the separation direction to balance the action of the gas pressure in the separation direction (see Patent Documents 1 and 2); It is known to introduce a gas pressure into the pressure chamber to balance the action of the gas pressure in the separation direction (see Patent Document 3).

Moreover, it is known that the valve was provided in both of the pipe joint to isolate | separate as an emergency escape pipe joint which does not blow out the gas in a filling hose after separation (patent document 1, 2, 3).

However, in such a case, there is a fear that gas may leak by damaging the flow path and the O-ring at the time of valve opening and incomplete sealing.

In addition, it is known to discharge gas from the gas opening passage provided at right angles to the separation direction in the process of separation as an emergency escape tube joint in which the separation plug does not protrude due to gas pressure during separation (see Patent Documents 2 and 3).

[Patent Document 1] Japanese Patent Laid-Open No. 6-278095

[Patent Document 2] Japanese Patent Laid-Open No. 2004-52867

[Patent Document 3] Japanese Patent Application Laid-Open No. 2004-293777

Therefore, none of the prior art is sufficient.

The present invention is separated under a certain load or more, and is not separated by the internal pressure of the gas, and the gas in the filling hose is not ejected after the separation, furthermore, the emergency escape without the escape plug from the gas pressure during separation. It aims to provide pipe joints. It is another object of the present invention to provide an emergency escape tube joint that can be easily assembled and reused after separation.

According to the present invention, it is constituted as a socket (3) having a fixed plug (2) attached to the pipe joint body (1), and a release plug (4) inserted into the pipe joint body (1). Inserting (4) opens the shut-off valves 18 and 32 provided in the fixed plug 2 and the release plug 4, and when the release plug 4 is removed from the socket 3, both shut-off valves 18 and 32. In the emergency release pipe joint which is closed, grooves 12 and 42 are formed on the inner wall surface of the pipe joint body 1 and the outer wall surface of the release plug 4, and the grooves 12 of the pipe joint body 1 are closed. The elastic ring 11 inserted into the coupling member is engaged with the groove 42 of the release plug 4 so that the release plug 4 is detachably locked from the pipe joint body 1.

In addition, the grooves 12 and 42 arranged on the inner wall surface of the pipe joint body 1 and the outer wall surface of the release plug 4 are two rows, and the elastic rings 11 are formed in the grooves 12 and 42, respectively. The release plug 4 is inserted into and connected to the pipe joint body 1 so as to be detachable.

In addition, the elastic ring 11 is a coil spring rolled obliquely to have a wheel shape.

In addition, the release plug 4 is formed with a taper 41 which pushes the elastic ring 11.

The pipe joint body 1 is provided with a flow path 7 having an inflow path 5 and an outflow path 6 on an inner wall thereof, and the shutoff valve 18 of the fixed plug 2 is formed of a valve body. It has valve diameters 19 and 20 of the same diameter before and after, the valve side 19 of the front side is inserted into the valve guide 21, the valve side 20 of the rear side is inserted into the valve chamber 23, Outflow paths 26 and 27 of the shutoff valve 18 are connected to the inflow path 5 of the pipe joint body 1, and the shutoff valve 32 of the release plug 4 is also provided before and after the valve body. It has valve diameters 33 and 34 of the same diameter, the valve side 33 of the front side is inserted into the valve intervection guide 34a, and the valve side 34 of the rear side is inserted into the valve chamber 36, and the shutoff valve The inflow paths 39 and 40 of the 32 are connected to the outflow path 6 of the pipe joint body 1, and between the valves 19 and 33 protruding from both side valve guides 21 and 34a. In close contact, both shutoff valves 18 and 32 are configured to open, (2) and the contact portion between the valve chambers 23 and 36 of the release plug 4 and the valve valves 19 and 33 between both sides communicate with the atmosphere through the openings 13, 14 and 16 in the pipe joint body 1. Doing.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Fig. 1, the emergency release pipe joint according to the present invention includes a socket 3 having a fixed plug 2 attached to the rear end (a downstream side of a fluid flow) of a cylindrical pipe joint body 1 as a whole, and a pipe joint. It is configured as a release plug 4 attached to the tip of the main body 1, and the fixed plug 2 of the socket 3 is connected to the filling device through a filling hose (not shown), and not shown in the release plug 4. The filling nozzle is connected via a filling hose.

The pipe joint body 1 is formed with an axial flow path 7 in which the inflow path 5 and the outflow path 6 are connected toward the inner wall, and the rear end of the flow path 7 is closed as a bolt 8. have.

At the rear end of the pipe joint body 1, a screw 9 for attaching the fixing plug 2 is provided, and at the front end, a cutout portion 10 into which the pin 45 planted and installed in the release plug 4 is inserted. It is formed by a parser, and the inner wall surface is formed with two rows of grooves 12 into which the elastic ring 11 for locking the release plug 4 is inserted.

As shown in Fig. 2, a normal coil spring or a C-shaped elastic ring may be used as the elastic ring 11, but it is most preferable to use a coil spring that is inclined.

As shown in the drawing, the pipe joint body 1 is formed with four holes 13, 14, 15, and 16 penetrating from the outer wall surface to the inner wall surface, and is provided at the rear end of the pipe joint body 1; The hole 13 in the valve chamber of the fixing plug 2 is the atmospheric pressure. The second hole 14 provided in the middle of the pipe joint body 1 is for degassing the flow path 7 during separation, as will be described later, by making the contact portions of the fixing and release plugs 4 contact each other at atmospheric pressure. . The third hole 15 provided at the front end side of the pipe joint body 1 is for degassing the inlet side of the shutoff valve of the release plug 4 and the gas in the flow path 7 during separation. Further, the fourth hole 16 provided at the distal end side of the pipe joint body 1 more than the third hole 15 has the valve chamber of the release plug 4 at atmospheric pressure to shut off the release plug 4 during separation. This is for degassing the inlet side of the valve.

In addition, when the O-ring OR is broken, the hole 14 is configured to remove the gas flowing into the room R from the gas flow path and to maintain it at atmospheric pressure.

The shutoff valve 18 provided on the plug body 17 of the fixed plug 2 has valve sections 19 and 20 of the same diameter taken in the axial direction on the front and rear sides, and the valve seat 25 by the spring 24. ) To force the valve to close. The front valve section 19 is inserted to be movable in the valve guide 21, the valve guide 21 is fixed to the plug body 17 with a nut 22, the rear valve section 20 is It is housed slidably in the valve chamber 23 provided at the rear of the plug body 17.

Between the valve guide 21 and the plug body 17, the outlet passages 26 and 27 of the shutoff valve 18 are formed to be stiff to the outside in the radial direction, and the outlet passages 26 and 27 are pipe joints. It communicates with the flow path 7 through the said inflow path 5 formed in the main body 1. As shown in FIG.

At the rear end of the plug body 17, a screw 28 for screwing into the screw 9 of the pipe joint body 1 is provided, and a mounting nut 29 to which a filling hose (not shown) is attached is screwed.

In addition, the plug body 17 has a hole 30 communicated with the valve chamber 23, and the valve chamber 23 is formed by the first hole 13 opened in the hole 30 and the pipe joint body 1. ) Is intended to be at atmospheric pressure.

The shutoff valve 32 provided in the plug main body 31 of the release plug 4 is substantially the same as the shutoff valve 18. The valves 33 and 34 having the same diameter extending in the axial direction are provided on the front and rear sides, and are urged to close the valve to the valve seat 38 by the spring 37. The front valve stem 32 is slidably inserted into the valve stem guide 34a, and the valve stem guide 34a is fixed to the plug main body 31 with a nut 35, and the rear valve stem 34 is provided. Silver is housed so that sliding is possible in the valve chamber 36 provided in the plug body 31.

Inlet paths 39 and 40 of the shutoff valve 32 extending in the radial direction are formed in the plug body 31 and the valve guide 34a, and the inlet paths 39 and 40 are connected to the pipe joint body 1. It communicates with the flow path 7 through the formed flow path 6.

On the outer wall surface of the plug body 31, a taper 41 is formed to press and widen the elastic ring 11 provided on the pipe joint body 1 so that two grooves 42 engaged with the elastic ring 11 are dug. It is provided, the mounting nut 43 of the filling hose is screwed on the rear end.

In addition, the plug body 31 is provided with a hole 44 communicating with the valve chamber 36, and the valve chamber (4) is opened by the fourth hole 16 opened through the hole 44 and the pipe joint body 1. 36) is intended to be at atmospheric pressure. In addition, the code | symbol 45 in a figure is a pin couple | bonded with the notch 10 of the joint body 1, and code | symbol OR is an o-ring for sealing.

In assembling, the emergency release pipe joint of the present invention assembles the socket (3) by screwing the fixed plug (2) to the pipe joint body (1) and inserts the release plug (4) into the pipe joint body (1). .

When the screw 28 of the fixing plug 2 is screwed and assembled to the screw 9 of the pipe fitting body 1, the outflow path 27 of the fixing plug 2 is an inflow path of the pipe fitting body 1. (5) communicates with the flow path (7), the valve chamber 23 communicates with the atmosphere through the holes (30, 13), and the tip of the fixing plug (2) communicates with the atmosphere through the holes (14). . When the release plug 4 is inserted into the pipe joint body 1, the taper 41 of the release plug 4 pushes and widens the elastic ring 11, and the elastic ring 11 is inserted into the groove of the release plug 4. In engagement with (42), the release plug (4) is locked to the pipe joint body (1), and the pin (45) is inserted into the cutout portion (10).

In the state where the elastic ring 11 is engaged with the groove 42, the valve section 19 of the stationary plug 2 and the valve section 33 of the release plug 4 are in contact with each other, so that both shutoff valves 18, 32 is in an open state. In addition, the inflow path 39 of the release plug 4 communicates with the flow path 7 through the outflow path 6 of the pipe joint body 1, and the valve chamber 36 passes through the holes 44 and 16. In communication with the atmosphere, the contact portions between the two valves 19 and 33 communicate with the atmosphere through the holes 14.

The rotation of the release plug 4 is prevented by the pin 45 inserted into the cutout 10, thereby preventing damage to the O-ring OR.

In operation, the gas flowing into the fixed plug 2 of the socket 3 from the filling hose with the emergency escape pipe joint flows from the plug body 17 through the outlet passages 26 and 27 to the pipe joint body 1. (7) flows into the plug main body 31 of the release plug 4 through the flow paths 39 and 40, and flows out from the release plug 4 to the filling hose.

In this state, when the filling hose, that is, the release plug 4 is bent by a predetermined force or more, the engagement by the elastic ring 11 is released, and the release plug 4 exits from the pipe body 1 of the socket 3. The contact between the valves 19 and 33 is released and the shutoff valves 18 and 32 are closed to prevent the outflow of gas (Fig. 3).

When the release plug 4 exits from the pipe joint body 1 again, the inflow path 39 of the release plug 4 and the flow path 7 of the pipe joint body 1 form holes in the pipe joint body 1. 15, gas in the inflow paths 39 and 40 and the flow path 7 are discharged to prevent separation promotion by the gas pressure (FIG. 4).

When the release plug 4 exits from the joint body 1 again, the inflow path 39 of the release plug 4 communicates with the hole 16 of the joint body 1 and exits from the hole 15. Unsuccessful gas is taken out to further promote the separation by the gas pressure (Fig. 5).

When the release plug 4 exits from the joint body 1 again, the flow path 7 of the joint body 1 communicates with the hole 14 of the joint body 1 and exits from the hole 15. Unsuccessful gas flow is further prevented from promoting the separation by the gas pressure. Then, the detachment plug 4 completely exits from the joint body 1 (FIG. 6).

In this way, after the gas pressure is sequentially released from the holes 14, 15 and 16, the release plug 4 is released from the pipe joint body 1, so that the release plug 4 does not bounce off by the gas pressure.

In the case where the detaching plug 4 is detached from the socket 3, after the safety has been checked, the detaching plug 4 can be inserted into the pipe joint body 1 and assembled.

Emergency release pipe joints which are separated under a certain load, and are not separated by the internal pressure of the gas, and that the gas in the filling hose is not ejected after separation, and that the release plug does not bounce off by the gas pressure during separation. It will be possible to provide a safe high-pressure gas filling device.

(1) In the present invention, since the separation plug is held in the socket by the elastic ring fitted into the groove, it is easy to keep the separation load constant and easy to reassemble after separation.

(2) Since valves before and after the shutoff valve have the same diameter and both ends of the valve communicate with the atmosphere, the valve closing force can be managed only by the coil spring without being affected by the internal pressure when the valve is closed after separation.

(3) By using a two-stage separation mechanism for the release plug from the socket, the gas in the flow path can be reliably drawn out through the open hole in the pipe joint body, and there is no danger of the escape plug falling off.

(4) Since the elastic ring is pushed and enlarged by the taper of the outer wall of the detaching plug, the plug including the elastic ring can be inserted with a load lower than the separating load.

Claims (5)

It consists of a socket (3) having a fixed plug (2) attached to the pipe joint body (1), and a release plug (4) to be inserted into the pipe joint body (1), the release plug (4) to the socket (3) When inserted, the shutoff valves 18 and 32 provided in the fixing plug 2 and the release plug 4 are opened. When the release plug 4 is removed from the socket 3, the both shutoff valves 18 and 32 are opened. In the emergency escape pipe joint to be closed, After the grooves 12 and 42 are formed on the inner wall surface of the pipe joint body 1 and the outer wall surface of the release plug 4, the elastic ring 11 fitted into the groove 12 of the pipe joint body 1 is closed. An emergency release pipe joint, characterized in that the release plug (4) is separably latched from the pipe joint body (1) by engaging the groove (42) of the release plug (4). The method of claim 1, The grooves 12 and 42 formed on the inner wall of the pipe joint body 1 and the outer wall of the release plug 4 are two stems each having an elastic ring 11 fitted into each of the grooves 12 and 42. Emergency escape tube joint characterized in that there is. The method according to claim 1 or 2, The elastic ring 11 is an emergency escape pipe joint, characterized in that the coil spring rolled inclined in the shape of a wheel. The method according to claim 1 or 2, An emergency release pipe joint, characterized in that a taper is formed on the outer wall of the release plug (4) to press and widen the elastic ring (11). The method according to claim 1 or 2, The pipe joint body 1 is provided with a flow path 7 having an inflow path 5 and an outflow path 6 on the inner wall surface, and the shutoff valve 18 of the fixing plug 2 is formed at the front and rear of the valve body. Has the same diameter between the valves 19 and 20, the front valve 19 is inserted into the valve guide 21, the rear valve 20 is inserted into the valve chamber 23 and shut off. Outflow passages 26 and 27 of the valve 18 are connected to the inflow passage 5 of the pipe joint body 1, and the shutoff valve 32 of the release plug 4 is also the same as before and after the valve body. It has a valve valve (33) 34 of the diameter, the valve valve 33 of the front side is inserted into the valve guide 34a, the valve valve 34 of the rear side is inserted into the valve chamber 36, the shutoff valve The inflow paths 39 and 40 of the 32 are connected to the outflow path 6 of the pipe joint body 1 and between the valves 19 on both sides that protrude from the inter-valve guides 21 and 34a. (33) are configured to open both shut-off valves 18 and 32 in contact with each other, The contact portions between the valve chambers 23 and 36 and the valve valves 19 and 33 of the fixing plug 2 and the release plug 4 are formed in the open hole 13 formed in the pipe joint body 1 ( 14) (16) emergency escape tube joint characterized in that the communication with the atmosphere.

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