JPS5817998Y2 - pipe fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a pipe joint used for connecting and disconnecting gas supply hoses, gas main valves, hose nipples of gas appliances, and the like.

This type of pipe joint is susceptible to explosions and fires due to gas leakage, so stable fluid sealing without gas leakage is strongly required when the plug and socket are connected.

Furthermore, since either the plug or the socket is connected to a hose that is prone to bending or twisting, it is important to ensure that the connection is maintained even if unexpected external force is applied to the pipe fitting due to such bending or twisting. It is strongly requested that it be maintained.

The object of the present invention is to obtain an improved gas pipe joint that eliminates gas leakage factors such as bending and twisting during use without reducing the flow rate of a gas pipe joint that requires fluid tightness.

Examples will be described below with reference to the drawings.

The pipe joint consists of a plug 10 and a socket 50.

In the following description, the side where the plug and socket are connected to each other will be referred to as the "front end" or "front", and the opposite side will be referred to as the "rear end" or "rear".

The main cylindrical body 12 of the plug 10 is provided with an outer circumferential groove 14 at one end of the front outer circumference which is inserted into the socket 50 and engages with a locking method described later, and an annular groove 1 at the rear following the outer circumferential part 16.
8 is provided and a sealing ring 20 is fitted therein.

The main cylindrical body is inserted into the expanded tube part 24 of the hose nipple 22 so that the outer peripheral protrusion 28 of the main cylindrical body 12 is engaged with the inner circumferential groove 26 of the expanded tube part 24 at the front end of the hose nipple 22, and the main cylindrical body is integrally coupled.

At this time, the sealing ring 20 provides a fluid seal between the two.

In addition, at the time of the connection described above, the outer circumferential portion 38 of the valve holding body 36 of the through hole 34 that supports the stem 32 of the valve body 30 is also clamped at the same time.

The sealing ring 40 of the valve body 30 is resiliently repelled by the spring 42 and comes into contact with the valve seat 44 of the main cylinder body 12 to provide a fluid-tight seal.

The front end of the valve body 30 is provided with a recessed portion 46 into which a valve pushing portion of a socket-side valve pushing body, which will be described later, engages.

Further, the valve body 30 is seated and held at a position recessed by a predetermined amount with respect to the front end surface 12a of the main cylinder body 12, so that careless external force is not applied to the valve body.
Therefore, a through hole 48 is provided between the front end surface and the valve body.

The main cylindrical body 52 of the socket 50 has an opening 54 into which the main cylindrical body 12 of the plug 10 is inserted, and has a through hole 60 into which the locking ball 5B is loosely fitted near the front end outer periphery collar 56, and the outer periphery at the rear. An annular groove 64 is provided following the collar 62.

An inner circumferential groove 68 corresponding to the outer circumferential collar 62 and annular groove 64 of the main cylinder body 52 is provided on the inner circumference of the front end fitting portion 66a of the rubber mouth tube 66.
and an inner peripheral flange 70 to make the fitting portion snap onto the main cylinder.

Note that when the main cylinder body 52 is a metal body, the rubber mouth pipe 6
6 can also be bonded by baking.

The front end fitting portion 66a of the rubber mouth tube 66 is provided with an outer circumferential step 72, and the outer circumferential protrusion 80 of the main cylinder body 52 is provided in the inner circumferential groove 78 of the protective sleeve 76, which has an engaging flange 74 for the stepped portion. The protective sleeve is fitted onto the main cylinder so as to engage with the main cylinder, and the protective sleeve is integrally connected to the main cylinder, and a certain tightening allowance is given to the fitting portion 66a of the rubber port tube, and this fitting portion is Protective sleeve 76
Protect with.

Note that, prior to coupling the protective sleeve 76 to the main cylinder 52, the inner circumferential stage 8 pressurizes the locking ball 58 in the centripetal direction.
An operating sleeve 84 and a spring 86 are interposed on the outer periphery of the main cylinder.

A sliding valve 90 that is resiliently repelled by a spring 88 is inserted into the opening 54 of the main cylindrical body 52 .

The rear flange 90b of the slide valve is positioned in contact with the center flange 92a of the valve pusher 92 so that the locking ball 58 is supported by the front end outer peripheral surface 90a of the slide valve.

A sealing ring 94 is baked on the inside of the front end of the slide valve 90, with which the front end surface 12a of the plug 10 comes into contact to provide a fluid seal, and another sealing ring 96 is disposed around the outer periphery.

The sliding valve 90 mainly consists of a central flange 92a of the valve pusher body 92.
The sliding valve is configured to slide using the outer circumferential surface of the valve as a guide, and even when pressed by the spring 88, the posture of the sliding valve is maintained constant so that the sealing effect is not impaired.

A rear end portion 92b of the valve pusher body 92 is fixed to the main cylinder body 52.

A split groove 94 is provided in the radial direction at the rear end shown in FIG. 4, and a wedge piece 96 is inserted to ensure this fixed state.

The head 98 of the valve pusher 90 is inserted into the recess 46 of the valve body 30 on the side of the plug 10, and serves to move the valve body out.

The head 98 is connected to the central collar 92a by an appropriate number of support arms 100 parallel to the axial direction, and the valve pusher 90
The inner through hole 102 communicates with the opening 104 between the support arms to form a wide fluid passage around the valve pusher body 90.

In addition, in the above description, the case where the plug 10 has the hose nipple 22 and the socket 50 has the rubber mouth pipe 66 has been described, but it is not limited to such an aspect. A rubber mouth pipe may be coupled to the socket 50, and a hose nipple may be coupled to the socket 50 side.

In the embodiment shown in FIG. 3, the main cylindrical body 52 of the socket 500 has an outer peripheral flange 62 and an annular groove 64 at the rear end, and also includes a locking ball 58, an operating sleeve 84, a sliding valve 90, and a valve pusher 92.
There is no difference from the socket 50 in the previous example in that it has a sealing ring 12 in the annular groove 64.
0 is fitted, and the front end expanded tube portion 12 of the hose nipple 122
The tube expansion portion is fitted onto the main cylinder body so that the outer circumferential protrusion 80 of the main cylinder body 52 is engaged with the inner circumferential groove 126 of No. 4, and the main cylinder body and the hose nipple are connected. The structure employs a fluid-tight seal between the two.

Next, the effect will be explained.

When the main cylindrical body 12 of the plug 10 is inserted into the opening 54 of the socket 50, the front end surface 12a of the main cylinder 12 of the plug 10 contacts the sealing ring 9 of the sliding valve 90.
4, the sliding valve is moved against the repulsion of the spring 88, and the locking ball 58 is released from being supported by the front end outer peripheral surface 90a of the sliding valve. Due to the elastic force, the operating sleeve 84 applies pressure in the centripetal direction, and as shown in the second figure, the plug 10 is pushed into the outer peripheral groove 14 of the plug 10 to complete the locked state.

At the same time, the support arm 100 of the valve pusher 92 of the socket 50 is inserted into the through hole 48 of the plug 10, and its head 98 is inserted into the valve pusher 92.
0 and is removed from the valve seat 44 while being inserted into the recess 46 of the plug 10. At this time, fluid is conducted from the plug 10 side to the socket 50 side.

In the connected state shown in FIG.
4 against the repulsion of the spring 86, the locking ball 58
is released from the depression caused by the sleeve and can freely move out in the radial direction, so that the spring 88 that resiliently repels the sliding valve 90 and the spring 42 that resiliently repels the valve body 30 act to connect the plug 10 and the socket 50. are separated from each other.

The pipe joint according to this invention includes a plug 10 which has a valve body 30 having a recessed portion 46 on its front face so as to be slidable in the axial direction, and a socket having a locking ball 58 which can be freely engaged and detached from the outer circumferential groove 14 of the plug. 50, when the plug 10 is connected inside the socket 50, the main cylinder 1 on the plug side
The valve pusher 92 advances into the through hole 48 of No. 2, and the valve pusher 98 provided at the tip engages with the recess 46 on the front face of the valve body 30 provided inside the plug, thereby forcing the valve to open. Further, a slide valve 90 having seals 94 and 96 on the outer periphery and the tip surface or the inner circumferential surface is fitted to the outer periphery of the valve holder 92 so as to be slidable in the axial direction of the valve holder 92. to support the locking ball, and further,
A plurality of support arms 100, 100 are formed in parallel in the axial direction around the valve pusher 98, and a fluid flow path is formed between each support arm, and the through hole 48 is formed on the outer peripheral surface of the support arm. Since a surface is formed that is in approximately line contact with the inner surface, the following effects are achieved.

(1) At the time of disconnection, the sliding valve 90 of the socket is supported by the central flange 92a of the valve pusher 92 and maintained in the correct (not eccentric) posture, so that it does not touch the plug side valve body 30 at the time of starting connection. Since the pressure is applied uniformly without deviation, the connection is made smoothly.

(2) Since the sliding valve 90 is not only simply inserted into the opening 54 of the socket 50 but also supported by a part of the valve pusher 92, the sliding valve 90 is supported by a part of the valve pusher 92. It is not susceptible to biasing loads due to sliding resistance or the resiliency of the spring 88, so that the front end surface 12a of the plug 10 always stably abuts against the sealing ring 94, resulting in a reliable fluid-tight state.

(3) Double fitting in which the main cylinder 12 of the plug 10 is inserted into the opening 54 of the socket 50 and at the same time the support arm 100 of the valve pusher 92 is inserted into the through hole 48 on the plug 10 side. Because of the joint structure, the contact state of the front end surface 12a of the plug 10 that contacts the sealing ring 94 of the sliding valve 90 is always constant.
A reliable fluid-tight seal is obtained while at the same time increasing the strength against diametrical or bending loads and maintaining a reliable connection.

(4) The head 98 of the valve pusher 92 is on the plug 10 side of the valve body 30
In order to remove the valve body while it is inserted into the recess 46,
The valve body will not be biased when leaving work, and the valve push body 9
Since valve body 2 controls the guidance, the valve body 30 does not deviate from the valve seat 4.
4 to maintain a secure seal.

(5) Since a structure is adopted in which a fluid flow path is formed between the support arms 100 that connect the head 98 of the valve pusher body and the center collar 92a radially and diagonally, even if the pipe joint has a valve pusher body, The fluid flow path formed in the valve body can be set wide, and the fluid flow rate will not be reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the pipe joint according to the present invention, in which FIG. 1 is a longitudinal cross-sectional view showing a separated state of a plug and socket, FIG. 2 is a longitudinal cross-sectional view showing a connected state of the plug and socket, and FIG.
FIG. 4 is a longitudinal sectional view showing a socket of another embodiment. FIG. 4 is a perspective view showing an example of a valve pusher. DESCRIPTION OF SYMBOLS 10... Plug, 12... Main cylindrical body, 14... Outer circumference groove, 30... Valve body, 46... Recessed part, 48... Through hole, 50... Socket, 52... ...Main cylinder, 58...
Locking ball, 76... Protective sleeve, 84... Operating sleeve, 90... Sliding valve, 92... Valve pusher, 94,9
6... Sealing ring, 98... Valve push part, 100... Support arm, 500... Socket.

Claims (1)

[Scope of utility model registration request] In a pipe joint, a plug 10 has a valve body 30 slidably built in in the axial direction and has a recess 46 on its front surface, and a socket 50 has a locking method 58 that can be freely engaged and detached from the outer circumferential groove 14 of the plug. When the plug 10 is connected to the inside of the socket 50, the valve pusher 98 that extends into the through hole 48 of the plug-side main cylinder 12 and is provided at the tip end presses against the valve body 30 provided inside the plug.
A valve pusher 92 is provided that engages with the recess 46 on the front surface to suppress the opening of the valve body, and a sealing ring 94 is provided on the outer periphery and the tip surface or inner circumference of the valve pusher 92. A slide valve 90 having a diameter of 96° is fitted to be slidable in the axial direction of the valve pusher to support the locking method, and a plurality of support arms 100, 100 are provided around the valve pusher 98. A tube that is formed parallel to the axial direction to form a fluid flow path between each support arm, and a surface that is in approximately line contact with the inner surface of the through hole 48 on the outer peripheral surface of the support arm. Fittings.