JPH0228311Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a pipe that is fitted around the outer periphery of two connected pipe bodies to prevent the fluid inside the pipe bodies from flowing out to the outside. This invention relates to a body seal packing.

(Prior art) Conventionally, packing for this type of pipe has been used to prevent scratches or rough surfaces from forming on the surface of the pipe when transporting various pipes to sites, etc. There was a problem with not being able to reliably seal the

The present invention is intended to prevent fluid leakage even if there is a flaw or the like on the surface of the tube, and its purpose is to prevent the packing body from tipping over when inserting the tube, A tube that allows the tube to be inserted in a fixed position without shifting, and which also completely prevents fluid leakage due to the sealing effect created by forming a seal on a surface perpendicular to the tube axis after the tube is inserted. The purpose is to provide a gasket for sealing the body.

(Means for Solving the Problems) In order to achieve the above object, the tube sealing packing according to the present invention is provided on the inner periphery of the tube connecting fitting body that is fitted on the outer periphery of the tubes. A recessed housing with a rectangular cross section is formed. The packing body that fits into this housing has a square cross section,
A cutout pressure introduction port is formed on one edge. A circular notch is formed in communication with this pressure introduction port, and serves as a relief for the packing body and a pressurizing section for the introduction pressure.

The portion that abuts the inner surface of the housing is provided with an inner circumferential surface having an inclined thick portion, and a hemispherical protrusion is formed in connection with the thick portion.

(Function) Next, to explain an example of the use of the present invention, as shown in FIG. Press it tightly and thickly, and as shown in Fig. 3, the gasket body 1
The projecting piece 7 provided above the pressure introduction port 4 is pushed into one inner surface 6 of the housing 3 and comes into contact with the inner surface in a biting state, thereby forming a seal portion 14 on the inner surface of the housing 3 in a direction perpendicular to the tube axis direction. be done. When the tubes A and B are inserted into the tube connection fitting main body 2, an escape force is generated in the packing body due to the insertion of the tubes A and B, but since the packing body 1 is square, the housing The escape force is blocked by each corner 12 of 3, and the packing body 1 does not fall.
In addition, a large introduction pressure is generated by the fluid flowing into the notch recess 5, and the inner circumferential surface 9 of the packing body 1 due to this introduction pressure is coupled with the biting force due to the formation of the thick portion 10 and the protrusion 11. The tubes are pressurized and come into close contact with the outer peripheral surfaces of the tubes A and B, completely preventing fluid leakage.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.A housing 3 is recessed in the inner peripheral direction of the tube of the tube connection fitting main body 2 that connects the tube A and the tube B.
form. The packing body 1, which is tightly fitted into the housing 3, is formed into an annular shape with a substantially rectangular cross section. This gasket body 1 has a U connected to the pressure introduction port 4 at one end edge on the tube body side.
A letter-shaped notch 5 is formed toward the center of the packing body 1. Moreover, by forming the notch 5, a protrusion 7 is formed above the pressure introduction port 4 of the packing body 1, which abuts on one inner surface 6 of the housing 3, which is perpendicular to the tube axis direction. Furthermore, a wide thick portion 10 is formed on the inner circumferential surface 9 that abuts the outer circumferential surface 8 of the tubular body on the pressure introduction port 4 side. In addition, the thick portion 1
0 has a hemispherical protrusion 1 relative to the inner circumferential surface 9.
1 is formed. Reference numeral 12 indicates a screw with a square hole that fastens the tube connection fitting main body 2 to the tubes A and B.

(Effects of the invention) As described above, according to the packing for sealing pipes according to the invention, even if the surface of various pipes is scratched during transportation or construction and an uneven surface is formed, the packing is pressurized. The action provides a reliable seal and completely prevents fluid leakage, and the substantially rectangular cross section ensures that the housing can be fitted securely. The gasket main body is provided with a pressure inlet at one end edge, and a substantially U-shaped notch is formed in communication with the pressure inlet, so that the gasket is heated by the introduced fluid pressure. There is an excellent effect in that the sealing of each part is ensured by the pressure applied by the main body to the inner surface of the housing and to the outer circumferential surface of the tube. In addition, by making the notch recess a relief part of the packing body and a pressurizing part for applying the introduction pressure to the tube body, the tube body can be easily inserted, and it has the effect of preventing the packing body from moving or overturning. The inflow pressure pressurizes the inner surface of the housing of the packing body, and the pressure of the inner circumferential surface of the packing body toward the outer circumferential surface of the tube has the effect of ensuring the sealing of that portion. Furthermore, since the protrusion is provided above the pressure introduction port of the packing body, the sealing effect is significantly increased. In addition, the packing body has an inner circumferential surface with an inclined thick wall section and a protruding section connected to the thick wall section, which significantly increases the sealing effect on the outer circumferential surface of each tube and also prevents fluid from flowing. It has an excellent effect of ensuring leakage prevention.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the packing of the present invention, Fig. 2 is a longitudinal sectional side view showing the state of use, Fig. 3 is an enlarged sectional view of the packing fitted in the housing, and Fig. 4 is the same of the tube body. FIG. 5 is an enlarged cross-sectional view of the main part in a state where it is fitted into the outer periphery, and FIGS. 5A to 5B are cross-sectional views showing other embodiments of the present invention. Symbols A and B are the tube bodies, 1 is the packing body, and 2 is the tube body connection fitting body. 3 is a housing, 4 is a pressure introduction port, 5 is a notched recess, 6 is an inner surface, 7 is a projecting piece, 9 is an inner peripheral surface, 10 is a thick part, 1
1 is a protrusion.

Claims (1)

[Scope of utility model registration request] In a tube sealing packing in which a packing body 1 is press-fitted into a fitting main body 2 for connecting tubes that connects opposing tubes A and B, the packing is fitted onto the outer periphery of the tubes A and B. A housing 3 having a rectangular cross section and recessed in the inner circumferential direction of the tube connection fitting main body 2.
The packing body 1, which is fitted into the housing 3, has a substantially rectangular cross section, and has a pressure introduction port 4 cut out at one end edge, and communicates with the pressure introduction port 4. A substantially U-shaped cutout recess 5 is formed in the cutout recess 5, and the cutout recess 5 serves as a relief part of the packing body 1 and the introduction pressure to the pipe A and the pipe B when the pipe A and the pipe B are inserted. The packing body 1 is configured as a pressurizing part and has a projecting piece 7 protruding above the pressure introduction port 4 that contacts the inner surface of the housing 3 in a direction perpendicular to the tube axis direction, and has an inner wall provided with an inclined thick part 10. A packing for a tube seal, characterized in that a circumferential surface 9 is provided and a protrusion 11 is formed in connection with the inner circumferential surface 9.