JPH018796Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a pipe joint that has high chemical resistance and can be used over a wide temperature range.

[Conventional technology] A conventional pipe joint consisting of a socket and a plug is
Since they are generally made of metal or plastic resin, they have drawbacks in corrosion resistance and temperature resistance. In addition, since the spring body attached to the valve body built into the socket and plug is made of metal, the spring body itself has poor corrosion resistance, and this spring body comes into contact with fluid or is likely to come into contact with it. It is loaded in position.

[Problems to be solved by the invention] As mentioned above, conventional pipe fittings have drawbacks in corrosion resistance and temperature resistance due to the material they are made of. It is not suitable for use as a pipe fitting in such cases. Furthermore, the spring body to which the built-in valve body is attached is made of metal, and this spring body is mounted in a position where it comes into contact with the fluid or is likely to come into contact with the fluid. In some cases, there are problems that make it unusable.

[Means for Solving the Problems] This invention solves the above problems and does not have any effect even when the fluid is a chemical or when the fluid is at high or low temperature. Without,
Furthermore, the present invention provides a pipe joint that can be used even in cases where fluid should not come into contact with metal.

In order to achieve this object, this invention fixes a valve lever having a valve pusher on the front and a valve seat on the back to the axial center of the fluid passage, and extends the valve lever along the wall surface of the fluid passage. In a pipe joint consisting of a socket equipped with a sliding valve that moves toward and away from the socket, and a plug equipped with a valve body in the fluid passageway that opens when the socket is pressed by the valve rod, the connection between the socket and the plug is At least the fluid contact portion is formed of a fluororesin, and the spring body attached to the socket-side sliding valve and the plug-side valve body is constructed of a fluororesin bellows body.

[Function] The pipe joint according to this invention has at least the fluid contact portion of the socket and plug made of fluororesin, so it has excellent chemical resistance and temperature resistance due to the material properties of the fluororesin itself. Excellent, and because the springs attached to the socket-side sliding valve and the plug-side valve body are also made of fluororesin bellows bodies, they will not be affected in any way even if the springs come into contact with fluids that do not want to touch metal. .

[Example] Hereinafter, this invention will be described in detail based on an example shown in the drawings, but this invention is not limited to the example.

In the drawings, 1 is a socket, and 2 is a cylindrical body constituting the socket 1, in which a fluid passage 3 is formed. Reference numeral 4 denotes a valve rod fixed to the axial center of the fluid passage 3, and the valve rod 4 has a valve pusher 5 on the front side, that is, on the plug insertion port side, and a valve seat 6 on the back side. A fixed body 7 fixes the valve rod 4 to the fluid passage 3. Reference numeral 8 denotes a sliding valve that moves toward and away from the valve seat portion 6, and this sliding valve 8 is provided along the fluid passage wall surface 9.

The cylindrical body 2, valve rod 4, fixed body 7, and sliding valve 8 that constitute the socket 1 are each made of fluororesin.

Reference numeral 10 denotes a spring body attached in a direction to bring the sliding valve 8 into contact with the valve seat 6. This spring body 10 is made of a bellows body made of fluororesin, and is connected to the fluid passage wall surface 9 and the sliding valve 8. A bullet was loaded between the two. 1
1 is a spring body 1 between the fluid passage wall surface 9 and the sliding valve 8.
0 is a seal ring fitted in a position close to 0; 12 is a locking ball that engages with an outer circumferential groove of a plug, which will be described later;
13 is a sleeve that presses the locking ball 12; 14;
1 is a spring body to which the sleeve 13 is attached, and 15 and 16 are seal rings.

17 is a plug, and 18 is a cylindrical body constituting the plug 17, in which a fluid passage 19 is formed. 2
0 is a valve body provided in the fluid passage 19, and this valve body 20 is opened by being pressed by the valve rod 4 when connected to the socket 1. The valve body 20 has a cylindrical portion 22 having a through hole 21 communicating with the fluid passage 19 inside.

Cylindrical body 18 and valve body 20 that constitute the plug 17
Like the socket 1, it is made of fluororesin.

Reference numeral 23 denotes a spring body that biases the valve body 20, and this spring body 23 is made of a fluororesin bellows body, similar to the spring body 10 attached to the sliding valve 8 on the socket 1 side. It is elastically mounted between the fluid passage wall surface 24 of the fluid passage 19 and the cylindrical portion 22 of the valve body 20.

25 and 26 are the fluid passage wall surface 24 and the valve body 20;
A seal ring 27 is fitted in a position close to the spring body 23 between the cylindrical portion 22 of the plug 17, and 27 is an outer peripheral groove formed in the plug 17. Provided locking ball 1
2 are adapted to engage. 28 and 29 are seal rings.

[Effects of the invention] The pipe joint according to this invention has a valve rod having a valve pusher on the front and a valve seat on the back fixed to the axial center of the fluid passage, and the valve lever is attached along the wall surface of the fluid passage. A pipe joint consisting of a socket provided with a sliding valve that moves toward and away from the socket, and a plug provided in the fluid passageway with a valve body that is opened by being pressed by the valve rod when connected to the socket, in which at least one of the socket and the plug is Since the fluid contact portion is formed of a fluororesin, the fluid contact portion has excellent chemical resistance and temperature resistance due to the material properties of the fluororesin. Since the springs attached to the socket-side sliding valve and the plug-side valve body are similarly made of fluororesin bellows bodies, even if a fluid that does not like to touch metal comes into contact with the springs, there is no effect.

As described above, the pipe fitting according to this invention has excellent chemical resistance, so it is especially suitable as a pipe fitting when the fluid is related to chemicals, pure water, or food, and it also has excellent temperature resistance. Therefore, it can be used over a wide temperature range, and can be used even when fluids do not want to come into contact with metal.

Furthermore, the fluororesin that forms the fluid contact area has low friction properties, so the seal ring requires no grease, making it an excellent pipe fitting when the fluid is chemicals, pure water, or food-related. have an effect.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a partially longitudinal side view, and FIG. 2 is a partially longitudinal side view showing a connected state. DESCRIPTION OF SYMBOLS 1... Socket, 3... Fluid passage, 4... Valve rod, 5... Valve push part, 6... Valve seat part, 8... Sliding valve, 9... Fluid passage wall surface, 10... Spring body , 17
...Plug, 19...Fluid passage, 20...Valve body,
23...Striatum.

Claims (1)

[Scope of utility model registration request] A valve lever having a valve pusher on the front and a valve seat on the back is fixed to the axial center of the fluid passage, and a sliding valve that moves toward and away from the valve seat is provided along the wall of the fluid passage. In a pipe joint consisting of a socket and a plug provided in a fluid passageway with a valve body that is opened by being pressed by the valve rod when the socket is connected, at least the fluid contact portion of the socket and the plug is formed of a fluororesin,
A pipe joint in which the springs attached to the socket-side sliding valve and the plug-side valve body are made of a fluororesin bellows body.