JPS6120389Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a joint pipe with a service valve for an automobile cooling system in which a service valve for refrigerant gas supply and degassing and evacuation (hereinafter referred to as refrigerant gas supply) is installed in the middle of the joint pipe. It is something.

As is well known, conventional service valves used in automotive cooling systems have a male thread for connection on the outer periphery of the tip end of the valve body, and have a built-in valve inside the valve body, which is connected to the pipe joint of the charging hose. When the female thread is screwed into the male thread, the insect valve opens and refrigerant gas can be supplied, and when the female thread of the charging hose is loosened, the insect valve closes and blocks the flow of refrigerant gas. There is. However, in these service valves, the fitting of the charging hose is attached and detached using screws, which is time consuming and inefficient, and it also takes a long time to completely close the valve. As a result, a large amount of refrigerant gas is scattered when the charging hose is attached or removed, which poses a safety problem.

Therefore, the purpose of this invention is to solve the above problems.The service valve position can be selected at any piping position that is easiest to work with, and the charging hose can be attached and detached from the service valve with a single touch. By using pipe fittings (hereinafter also referred to as one-touch fittings), this can be done easily and quickly, minimizing the scattering of refrigerant gas when attaching and disconnecting hoses. The purpose of this project is to provide a joint piping with a service valve for an automobile cooling system that can be connected without any problem to a charging hose having a charging hose (also referred to as a joint). The valve body has a flared seat part for airtightness on the tip surface, a bug valve is built into the valve body, and the outer periphery of the tip side of the valve body has a male thread that can be screwed with the female thread of the threaded pipe fitting. A fitting part is formed on the outer periphery of the proximal end of the valve body that has a larger diameter than the male thread and can be fitted into the socket of the one-touch type pipe fitting, and the ball of the socket and the ball of the socket are formed on the circumferential surface of the fitting part. It is characterized by the formation of a removable annular locking groove. The embodiments shown in the drawings will be described below.

In Fig. 1, 1 is a joint pipe with a service valve, a joint pipe 2 bent in an L-shape, and a joint pipe 2 with a service valve.
It consists of a service valve 3 attached by brazing or screwing in the middle of the pipe, a flare nut 4 provided at one end of the joint pipe 2, and a nipple 5 provided at the other end of the joint pipe 2. These are connected to the middle of the side piping and the middle of the low pressure side piping, respectively. Note that the joint pipe with a service valve of the present invention is not limited to the above-mentioned one, and the joint pipe is not limited to an L-shape, but may be straight, or may have a refrigerant hose fixed to its end. . Next, the service valve 3 is
This will be explained in the figure. The service valve 3 includes a valve body 6 whose base end (lower part in FIG. 2, hereinafter the lower side in FIG. 2 is referred to as the base end side) is attached to the joint pipe 2, and a valve body 6 built in the valve body 6. insect valve 7
It is composed of. The tip surface of the valve body 6 (the upper end surface in FIG. 2, hereinafter the upper side in FIG. 2 is referred to as the tip side) is chamfered to form a flared seat portion 8 for sealing. On the outer periphery of the side, a male thread 9 that can be screwed together with the female thread of a pipe joint of a threaded joint type charging hose described later is threaded, and on the outer periphery of the proximal end of the valve body is a one-touch thread that has a larger diameter than the male thread 9 and is described later. Fitting part 10 that can fit into a socket of a joint type charging hose
An annular locking groove 11 is formed on the circumferential surface of the fitting portion 10, and the groove 11 is removable from the ball of the socket. The portion becomes the connection surface 12. Further, a valve hole 13 passing through the valve body 6 is provided at the axial center of the valve body 6 . This valve hole 13
A bug valve 7 similar to the conventional one is built into the tip side. To explain the insect valve 7, an insect valve main body 14 is screwed onto the inner circumferential surface of the tip of the valve hole 13. A valve body 15 in the valve body 14 is fitted through the gas passage so as to be movable in the axial direction, and a gasket 17 is attached to a gasket receiver 16 formed on the base end side of the valve body 15. A valve spring 18 is provided between the valve body 15 and the insect valve body 14.
is sealed, and this valve spring 18 urges the valve body 15 toward the distal end side, presses the gasket 17 against the base end surface of the insect valve body 14, and closes the insect valve 7 to cut off the flow of refrigerant gas. It's summery. Next, a one-touch joint type charging hose 19 that can be attached to and detached from the service valve 3 as described above will be explained with reference to FIG. The one-touch joint type charging hose 19 is composed of a charging hose 20 whose one end is connected to a gauge manifold (not shown), and a socket 21 attached to the other end of the charging hose 20. This socket 21 will be explained below. Reference numeral 22 is a pipe whose one end is attached to the charging hose 20, and a nut 23 is integrally formed at the other end. Natsu 23
A valve body 24 is fitted inside, and this valve body 24 is a cylindrical socket body 2 screwed into a nut 23.
5 to the inner part of the nut 23. A valve hole 26 is bored in the axial center of the valve body 24, and the front end side of this valve hole 26 (lower side in FIG. 3, hereinafter, the lower side is referred to as the front side and the upper side is referred to as the rear side in FIG. 3). A valve seat 27 is formed on the inner peripheral surface. A support frame 28 is fixed to the rear end of the valve hole 26, and a valve stem 29 is fitted into the hole of the support frame 28 so as to be slidable in the axial direction.An O-ring 30 is attached to the valve stem 29 in the middle thereof. and this O-ring 3
0 is pressed against the valve seat 27 by a valve spring 31 sealed between the support frame 28 and the valve spring 31 . The valve body 2
A slide body 32 is loosely fitted between the outer periphery of the valve body 4 and the inner periphery of the socket body 25 so as to be freely slidable in the axial direction.
4 is biased by a pressure spring 33 enclosed between the socket body 25 and the socket body 25, and is brought into contact with the stopper surface 25a of the socket body 25. The inner diameter of the front end of the slide body 32 is formed to be slightly larger than the outer diameter of the male thread 9 of the valve body 6, so that when the socket 21 is attached to the service valve 3, the slide body 32 will not catch on the male thread 9. It's becoming like that. A packing 34 that can come into contact with the flare seat portion 8 of the valve body 6 is attached to the intermediate portion of the inner circumference of the slide body 32. The front end of the hole of the socket body 25 is a fitting hole 3 that can be fitted to the fitting part 10 of the valve body 6.
5, and a plurality of ball holes 36 are bored in the circumferential surface of this fitting hole 35. A ball 37 is fitted into this ball hole 36, and the ball 37 is inserted into the socket body 25 when the slide body 32 is inserted into the socket body 25 as shown in FIG.
When the slide body 32 is in contact with the stopper surface 25a, it is pushed outward by the tip of the slide body 32 and is restricted from moving inward (towards the axis), and the slide body 32 resists the pressure spring 33. When it is slid rearward, it can enter into the fitting hole 35. A sleeve 38 having a push-out portion 38a capable of pushing the ball 37 inward is loosely fitted around the outer periphery of the front end of the socket body 25, and the sleeve 38 is urged forward by a spring 39 and comes into contact with the ball 37. The location is regulated in close contact with each other. 40 is a retaining piece for the sleeve 38.

When attaching the one-touch joint type charging hose 19 configured as described above to the service valve 3, as shown in FIG.
When the socket 21 is pressed so that the fitting hole 35 matches the fitting part 10 of the valve body 6, the gasket 34 of the slide body 32 comes into contact with the flare seat part 8 of the valve body 6, and when the socket 21 is pushed further, The slide body 32 is pushed by the flare seat section 8 and is moved backward against the pressure spring 33, thereby causing the gasket 34 and the flare seat section 8 to move backward.
is strongly crimped to connect the valve hole 13 and the valve hole 26 airtightly, and the tip of the slide body 32 is tightly pressed against the valve body 6.
is connected to the connecting surface 12 of the. The ball hole 36 of the socket body 25 is connected to the locking groove 11 of the valve body 6.
When the ball 37 is pushed inward by the sleeve 38 biased by the spring 39, the ball 37 fits into the locking groove 11, and the sleeve 38
The extrusion portion 38a moves to prevent the ball 37 from being pulled out outward and comes into contact with the retaining piece 40. On the other hand, when the socket 21 is pressed against the valve body 6 as described above, the valve body 15 of the insect valve 7 and the valve stem 29 of the socket 21 are pressed against each other to open the respective valves, and almost at the same time, the gasket 34 of the socket 21 flares. It is pressed against the seat portion 8 to seal between the socket 21 and the service valve 3.
In this state, refrigerant gas is supplied, etc. Next, when removing the socket 21 from the service valve 3, when the sleeve 38 of the socket 21 is moved rearward against the spring 39, the socket 21 is pushed rearward by the spring force of the pressure spring 33. As a result, the ball 36 comes out of the locking groove 11 and the socket 21 is removed. Further, the valve body 15 of the insect valve 7 and the valve stem 29 of the socket 21 are each connected to the valve spring 1.
8 and 31 to close the respective valves and return to the original state. The one-touch joint type charging hose 19 is attached and detached as described above, but since it can be attached and detached by inserting and removing the socket 21 as described above, the attachment and detachment work can be done in a short time. Furthermore, since the time required for attachment and detachment is short, leakage of refrigerant gas can be minimized.

Next, the fifth section describes the case of connecting the conventional threaded joint type charging hose 50 to the service valve 3.
This will be explained using figures. The pipe joint 51 of the threaded joint type charging hose 50 has a pipe 52 and a joint body 53.
It is composed of. The pipe 52 has a valve pressing piece 54 and a packing 55 at its tip, and a female thread 56 is cut on the inner periphery of the joint body 53.
When attaching the threaded joint type charging hose 50 to the service valve 3, the female thread 56 of the joint body 53 may be screwed into the male thread 9 of the service valve 3. In that case, the valve pressing piece 54 presses the valve body 15 of the insect valve 7 to open the insect valve 7, and the gasket 55 comes into pressure contact with the flare seat portion 8 to seal the refrigerant gas inside. In addition, when removing the threaded joint type charging hose 50 from the service valve 3, the female thread 56 of the joint body 53 is connected to the service valve 3 of the present application by attaching a one-touch joint to the charging hose 50 as described above. In particular, the charging hose 50 can be attached and detached easily and quickly, and also the threaded joint of a commonly used threaded joint type charging hose can be connected, providing versatility. Furthermore, when the service valve of the present application is assembled into an automobile cooling system, the joint pipe is connected to the middle of the refrigerant gas pipe so that the service valve is in a position where it is easy to perform operations such as supplying the refrigerant gas. This allows operations such as supplying refrigerant gas to be performed easily.

Next, another embodiment will be described with reference to FIGS. 6 to 8, and the same or equivalent configurations as those of the previous embodiment will be given the same reference numerals as corresponding parts, and the explanation thereof will be omitted. Service valve 103 shown in FIG.
, 106 is a valve body, and in the case of this embodiment, an O-ring pressure contact surface 161 is formed between the flare seat portion 8 on the outer periphery and the male thread 9, and a valve hole 113 is provided in the shaft center. A valve seat 162 is formed on the inner peripheral surface of the distal end of the valve hole 113. An insect valve 107 is built into this valve hole 113. Next, to explain the insect valve 107, 1
63 is a support frame provided in the valve hole 113; 115;
is a valve body that is slidably fitted into a support frame 163, and an O-ring 164 at the tip is attached to the valve spring 118.
The O-ring 164 is urged to come into pressure contact with the valve seat 162. 121 is the 119 socket of the one-touch joint type charging hose, 125
is the socket body integrated with the pipe 122,
It has a valve hole 126, a fitting hole 165, and a valve seat 127 formed between the two holes at its axial center. A valve 166 similar to the insect valve 107 is built into the valve hole 126, and an O-ring that can be pressed against the O-ring pressure contact surface 161 is provided on the inner peripheral surface of the fitting hole 165.
A ring 167 is attached. With the sleeve 38 moved upward in FIG. 7 against the spring 39, the socket 121 is inserted into the valve body 1.
03, the ball 37 fits into the locking groove 11, and then when the sleeve 38 is returned to its original position, the one-touch joint type charging hose 119 can be attached to the service valve 103. In this case, the O-ring 167 of the socket 121 is pressed against the O-ring contact surface 161 of the service valve 103 to seal between the socket 121 and the service valve 103. Also, when the sleeve 38 is moved and the socket 121 is pulled, the service valve 1
One-touch joint type charging hose 1 from 03
19 can be removed.

As described above, in the present invention, a fitting part is formed on the outer periphery of the proximal side of the valve body that houses the insect valve, and a locking groove is formed on the circumferential surface of this fitting part to form a one-touch joint. The socket of the type charging hose can be fitted, so if you prepare a one-touch type charging hose, you can quickly attach and detach the charging hose when supplying refrigerant gas, etc., improving work efficiency. Also, as mentioned above, the charging hose can be attached and detached in a short time.
It is possible to minimize the scattering of refrigerant gas when attaching or removing the charging hose, thereby improving safety. In addition, a flared seat part is formed on the tip surface of the valve body, and a male thread is threaded on the outer periphery of the tip side of the valve body so that it can be screwed into the female thread of the pipe joint of the threaded joint type charging hose. This effect can also be applied to joint-type charging hoses.

Further, since the service valve is installed in the middle of the joint piping, the piping can be arranged so that the service valve is located at a position where it is easy to perform operations such as refrigerant gas supply, thereby improving the work efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of a joint piping with a service valve for an automobile cooling system according to the present invention, in which Fig. 1 is a side view thereof, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a one-touch A sectional view of the main parts of the joint type charging hose, Figure 4 is an assembly diagram of the one-touch joint type charging hose attached to the service valve,
Figure 5 is an assembly diagram of a threaded joint type charging hose attached to a service valve, Figure 6 is a sectional view showing another embodiment of the service valve, and Figure 7 is another embodiment of a one-touch joint type charging hose. FIG. 8 is an assembly diagram of the service valve shown in FIG. 6 and the one-touch joint type charging hose shown in FIG. 7. 1...Joint piping with service valve, 2...Joint piping, 3,103...Service valve, 6,10
6... Valve body, 7,107... Insect valve, 8
... Flare seat part, 9 ... Male thread, 10 ... Fitting part, 11 ... Locking groove, 19,119 ... One-touch joint type charging hose, 21,121 ...
...Socket, 37...Ball, 50...Screw joint type charging hose, 56...Female thread.

Claims (1)

[Scope of utility model registration request] A joint pipe with a service valve for an automobile cooling system, which is provided with a service valve in the middle of the joint pipe to which a screw type or one-touch type pipe joint attached to one end of a charging hose is detachably connected, and the above-mentioned service The valve has a valve body whose base is fixed to the joint pipe, and this valve body has a valve hole that opens on the inside surface of the joint pipe and the tip surface, and inside the valve body is an insect valve that opens and closes the valve hole. A flare seat part is formed on the tip surface of the valve body, which contacts the packing of the pipe fitting to airtightly connect the valve hole of the pipe fitting and the valve hole of the valve body. The outer periphery of the side is threaded with a male thread that can be screwed into the female thread of a threaded pipe fitting, and the outer periphery of the proximal end of the valve body is threaded with a male thread that has a larger diameter than the above male thread and can be fitted into the socket of a one-touch type pipe fitting. A fitting part is formed, and an annular locking groove is formed on the circumferential surface of the fitting part to be able to engage and detach from the ball of the socket, so that the one-touch type pipe fitting and the screw type pipe fitting can be selectively connected. A joint pipe with a service valve for an automobile cooling system, characterized by: