JPH0110554Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention consists of a main cylinder part made up of a combination of a plurality of cylinders, which are connected to each other in order to open and close the fluid passage provided in the main cylinder part. The present invention relates to a pipe joint consisting of a socket and a plug in which a valve body and a valve seat are separated from each other in a fluid passage.

[Prior Art] A conventionally used valve body in which the main cylinder part is composed of a combination of a plurality of cylinder bodies, and which moves toward and away from each other in order to open and close a fluid passage provided in the main cylinder part. A pipe joint consisting of a socket and a plug, in which the valve seat and the valve seat are provided in the fluid passage, is designed to seal between each cylinder to prevent fluid from leaking between the cylinders that make up the main cylinder. A seal ring is fitted between each cylindrical body, and a seal ring is also fitted to the valve seat to seal the fluid passage, as the valve body and valve seat contact each other to open and close the fluid passage. It matches.

[Problems to be solved by the invention] As mentioned above, the seal ring that seals between the cylinders constituting the main cylinder part of the pipe joint and between the valve body and the valve seat is usually made of rubber. Due to the nature of the material, rubber has drawbacks in corrosion resistance and body temperature resistance, and is therefore undesirable as a pipe joint for use when the fluid is a chemical or when the fluid is at high or low temperatures.

[Means for solving the problem] This invention solves the above problems and can be used without any influence even when the fluid is a chemical or the fluid is at a high or low temperature. This provides a pipe joint for the purpose of

In order to achieve this purpose, this invention consists of a main cylinder part made up of a combination of a plurality of cylinder bodies, and a valve body that approaches and separates from each other to open and close a fluid passage provided in the main cylinder part. In a pipe joint consisting of a valve seat, a socket and a plug provided in the fluid passage, the cylinders constituting the main cylinder are made of fluororesin having different hardness, and the cylinder with a higher hardness is made of fluororesin. , a chevron-shaped protrusion is formed in an annular shape on the surface facing the cylindrical body having a low hardness, and on the other hand, the above-mentioned valve body and valve seat are also made of fluororesin having different hardnesses, and the other side is formed on the side having a high hardness. An annular chevron-shaped protrusion is formed on the contact surface.

[Function] In the pipe joint according to this invention, the plurality of cylinders constituting the main cylinder part serving as the socket and the plug are made of fluororesin with different hardness, and the cylinder with higher hardness is made of fluororesin with hardness. Since the chevron-shaped protrusion is formed in an annular shape on the surface facing the small cylinder, when the plurality of cylinders are combined, the annular chevron-shaped protrusion formed on the facing cylinder with high hardness becomes the cylinder with low hardness. The cylinders bite into the facing surfaces of the cylinders, thus completely sealing the space between the connected cylinders. In addition, the valve body and valve seat that come into contact with and separate from each other in order to open and close the fluid passage of the main cylinder section constituted by the combined body of the plurality of cylinders are also made of fluororesin having different hardness, and have a high hardness. Since an annular chevron-shaped protrusion is formed on the contact surface with the other side on the one side, when the valve seat is placed on the valve body, the annular chevron-shaped protrusion formed on one side bites into the other side, so that the fluid passage is closed. completely sealed. Furthermore, since each cylinder, valve body, and valve seat constituting the main cylinder are made of fluororesin, they have excellent chemical resistance and temperature resistance due to the material properties of fluororesin.

[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 drawing, 1 is the main cylinder part which becomes the socket 2,
Reference numeral 3 denotes a main cylindrical portion which becomes a plug 4. The main cylindrical portion 1 is constituted by a combination of a plurality of cylindrical bodies 5, and the main cylindrical portion 3 is also constituted by a combination of a plurality of cylindrical bodies 6. Fluid passages 7 and 8 formed inside the main cylinder parts 1 and 3
Inside, valve bodies 9, 10 and valve seats 11, 12 are provided which move toward and away from each other in order to open and close the fluid passages 7, 8. A valve seat 11 provided in the main cylinder portion 1 is fixed to the axial center of the fluid passage 6, and a valve body 9 is provided slidably along the wall surface of the fluid passage 6. On the other hand, the valve body 10 of the main cylinder part 3 is slidably provided in the fluid passage 8, and the valve seat 12 is formed on the inner wall of the fluid passage 8 of the main cylinder part 3.

The cylinders 5 and 6, which constitute the main cylinder parts 1 and 3, are made of fluororesin having different hardnesses. 5a, 6a have cylinders 5b, 6b with small hardness.
Angular protrusions 13 and 14 are formed in an annular shape on the surface facing the .

Therefore, each cylinder 5a, 5b and each cylinder 6a,
When the cylinders 5b and 6b are combined, the annular chevron-shaped protrusions 13 and 14 formed on the cylinders 5a and 6a connect to the cylinders 5b and 6b.
It bites into the facing surfaces 15 and 16 of b, and the cylinders 5a and 5b and the cylinders 6a and 6b are completely sealed.

Further, valve bodies 9 and 10 and valve seats 11 provided in the fluid passages 7 and 8 of the main cylinder part 1 and the main cylinder part 3 constituted by the combination of each cylinder body 5 and each cylinder body 6, 12
The valve body 9 of the main cylinder portion 1 is made of a fluororesin with a higher hardness, and the valve seat 11 is made of a fluororesin with a lower hardness. The valve body 10 of the portion 3 is made of a fluororesin having a low hardness, and the valve seat 12 is made of a fluororesin having a high hardness. On the valve body 9 of the main cylinder part 1 and the valve seat 12 of the main cylinder part 3, which have a high hardness, chevron-shaped protrusions 17 and 18 are formed in annular shapes on the contact surfaces with the valve seat 11 and the valve body 10, which have a low hardness. It has been done.

When the valve bodies 9, 10 are brought into contact with the valve seats 11, 12, the annular chevron-shaped protrusions 17, 18 formed on the valve body 9 and valve seat 12 bite into the valve seat 11 and valve body 10, and the main Fluid passage 7 of the cylinder part 1 and the main cylinder part 3,
8 is completely sealed.

Reference numeral 19 denotes a spring body that urges the valve body 9 in a direction to bring it into contact with the valve seat 11, and this spring body 19 is made of a bellows body made of fluororesin. 20 is the valve body 10
It is a spring body that biases the valve in the direction of bringing it into contact with the valve seat 12, and is made of a bellows body made of fluororesin as described above.

Reference numeral 21 indicates a locking ball provided in the main cylindrical portion 1 serving as a socket, 22 a sleeve that presses the locking ball 21, 23 a spring body that urges the sleeve 22, and 24
is an engagement groove for a locking ball 21 formed on the outer periphery of the main cylinder portion 3 that becomes the plug 4.

[Effects of the invention] The pipe joint according to this invention has a main cylinder part composed of a combination of a plurality of cylinder bodies, and valve bodies that move toward and away from each other to open and close a fluid passage provided in the main cylinder part. and a valve seat, in a pipe joint consisting of a socket and a plug provided in the fluid passage, the cylinders forming the main cylinder part are made of fluororesin having different hardnesses, and the cylinders are made of a cylinder with a higher hardness. Since a chevron-shaped protrusion is formed in an annular shape on the surface facing the cylindrical body having a small hardness, when the plurality of cylindrical bodies mentioned above are combined, the annular chevron-shaped protrusion formed on the facing cylindrical body having a high hardness will have a low hardness. Since it bites into the cylindrical body, it is possible to completely seal the connected cylindrical bodies, and unlike conventional pipe joints, there is no need for a seal ring for sealing.

In addition, the above-mentioned valve body and valve seat are similarly made of fluororesin with different hardness, and the side with the higher hardness has an annular chevron-shaped protrusion formed on the contact surface with the other side. When brought into contact, the annular chevron-shaped protrusion formed on one side bites into the other, so the fluid passage in the main body can be completely sealed by the valve body and valve seat.
Unlike conventional pipe joints, there is no need for a seal ring for sealing.

In this way, the pipe fitting according to this invention does not require the use of a seal ring, which has drawbacks in chemical resistance and temperature resistance, and furthermore, the cylindrical body constituting the main cylinder part that becomes the socket and plug has chemical resistance and resistance. Since it is made of a fluororesin with excellent temperature properties, it is especially suitable as a pipe joint when the fluid is related to chemicals, pure water, or food, and has the advantage of being able to be used over a wide temperature range.

[Brief explanation of drawings]

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. 1...Main cylinder part, 2...Socket, 3...Main cylinder part, 4...Plug, 5, 6...Cylinder body, 7, 8...
Fluid passage, 9, 10... valve body, 11, 12... valve seat, 13, 14, 17, 18... chevron shaped protrusion.

Claims (1)

[Scope of utility model registration request] The main cylinder part is composed of a combination of a plurality of cylinders,
In a pipe joint consisting of a socket and a plug provided in the fluid passage, a valve body and a valve seat that move toward and away from each other to open and close the fluid passage provided in the main cylinder part,
The above-mentioned cylinders constituting the main cylinder part are made of fluororesin having different hardnesses, and the cylinders have a higher hardness.
A chevron-shaped protrusion is formed in an annular shape on the surface facing the cylindrical body, which has a low hardness, and the valve body and valve seat are also made of fluororesin having different hardnesses, and a side with a high hardness is formed with the other side. A pipe joint with an annular chevron-shaped protrusion formed on the contact surface.