JPH04111981U - Pipe connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] In a structure in which a connecting pipe is fitted inside the connecting port, and a seal is provided by a seal ring fitted on the inner circumference of the connecting port, the outer diameter of the connecting pipe may vary. To ensure reliable sealing by always obtaining the optimum tightness of the seal ring. [Structure] Two seal ring grooves 6 and 7 having different diameters are formed on the inner peripheral surface of the connection port 1. As shown by the solid line, if the outer diameter of the connecting pipe 3 is large, fit the seal ring 9 into the large diameter groove 6 at the front, and if the outer diameter is small, as shown by the chain line, fit the seal ring 9 into the small diameter groove at the back. into the groove 7.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a structure in which a connection pipe is inserted into a connection port for connection, and in particular, to the This invention relates to a pipe connection structure with improvements made to the main part.

0002

[Conventional technology]

When connecting by fitting a connecting pipe into the connection port, the sealing means is to use the inside of the connection port. It is known that a seal ring groove is formed on the circumferential surface and the seal ring is fitted into the groove. ing. With this sealing method, if there are variations in the outer diameter of the connecting pipe, the seal will If there is not enough tightening allowance for the ring, the seal may not be sufficient, or the fitting may be too tight. I feel tired.

0003

[Problem that the idea aims to solve]

For this reason, in the past, finishing was applied to the outer periphery of the connecting pipe, or pipes of different sizes were used. Prepare multiple types of seal rings to optimize the tightness of the seal rings. However, it required extra work to process the connecting pipe, and the seal ring The disadvantage was that it was troublesome to manage.

0004

[Means to solve the problem]

The pipe connection structure of the present invention was devised in view of the above points, and the pipe connection structure of the present invention has been devised in view of the above points. Multiple seal ring grooves with different diameters are provided on the inner circumferential surface of the connection port that fits and connects. The connecting pipes are formed at intervals in the insertion direction of the connecting pipes.

[0005]

[Effect]

The present invention has the above configuration, and the seal ring can be adjusted according to the variation in the outer diameter of the connecting pipe. Optimal tightening of the seal ring can be achieved by selecting the seal ring groove in which the seal ring is fitted. get white.

[0006]

【Example】

An embodiment of the present invention will be described below with reference to FIG.

[0007] In the figure, 1 is a connection port protruding as a port of a solenoid valve, etc. on the back side. has a stepped inner circumferential surface with a reduced diameter, and the connecting pipe 3 has a stepped portion inside this connecting port 1. It is designed to be inserted until it hits point 2 and connected.

[0008] The enlarged diameter portion 5 on the inner peripheral surface of the connection port 1 has two circumferential grooves 6 and 7 for fitting a seal ring. are formed at intervals in the insertion direction of the connecting pipe 3, and the circumferential groove 6 on the front side is large. The circumferential groove 7 on the back side has a small diameter, and the diameters are different from each other.

[0009] Therefore, there are variations in the outer diameter of the connecting pipe 3, as shown by the solid line in the figure. , if the outer diameter of the connecting pipe 3 is larger, install a seal ring in the circumferential groove 6 on the large diameter side at the front. By fitting the seal ring 9, an appropriate tightening margin can be obtained for the seal ring 9, and a reliable seal can be achieved. guaranteed.

0010 As shown by the chain line in the figure, if the outer diameter of the connecting pipe 3 is small, the same By fitting the ring 9 into the small diameter circumferential groove 7 on the back side, appropriate tightening can be achieved. You can get ro.

[0011] Note that as the number of seal ring grooves with different diameters increases, the outer diameter of the connecting pipe 3 increases. Of course, it is possible to respond precisely to variations in dimensions.

0012

[Effect of the idea]

In other words, according to the present invention, the seal ring can be created without requiring finishing of the connecting pipe. Prepare only one type of seal ring and select one from multiple seal ring grooves to fit it. By simply using the There is an effect that can be done.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of an embodiment of the present invention.

[Explanation of symbols]

1: Connection port 3: Connection pipe 5: (Inner peripheral surface of connection port 1)
Expanded diameter part 6, 7: Circumferential groove 9: Seal ring

Claims (1)

[Scope of utility model registration request] 1. A plurality of seal ring grooves having different diameters are formed at intervals in the insertion direction of the connecting pipe on the inner circumferential surface of the connecting port into which the connecting pipe is inserted and connected. pipe connection structure.