JPH0722173U - Pipe joint structure - Google Patents

Abstract

(57) [Summary] [Purpose] When joining a pair of thin-walled pipes through a liquid packing, it is possible to join the pipes without blocking the holes, and it is easy to connect the holes of both pipes. An object of the present invention is to provide a pipe connecting structure that can be connected coaxially. [Structure] A plug portion 16 communicating with a hole 14b is provided on a joint surface 14a of a pipe 14 and a socket portion in which the plug portion 16 is fitted to a joint surface 15a of the other pipe 15 connected thereto. 17. A pipe joint structure, characterized in that the pipe 17 is provided with the pipes 14 and 15 and the joint surfaces 14a and 15a thereof are hermetically joined by a liquid packing 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is a structure for hermetically joining pipes to each other in a state where the holes of the pipes communicate with each other, and is particularly suitable for use when joining pipes having relatively small wall thicknesses through liquid packing. The joint structure of various pipes.

[0002]

[Prior art]

 Conventionally, as a structure for sealingly joining pipes to each other with their holes communicating with each other, as shown in FIG. 6, a liquid packing 3 is applied to the joint surfaces 1b and 2b to which the pair of pipes 1 and 2 are joined. , The joint surfaces 1b and 2b are joined together, and as shown in FIG. 8, a peripheral groove 3 is formed in the outer periphery of the hole 2a in the joint surface 2b of one of the pipes 2, and the liquid body is formed in the peripheral groove 3. There is a structure in which the packing 4 is applied and the joint surface 1b of the other pipe 1 is butted and connected.

Further, as shown in FIG. 10, the end portions of the liquid packing 4 can be accommodated continuously in the circumferential direction on the mating surfaces 1a and 2a of the flange portions 1A and 2A of both or one of the casing members 1 and 2. A structure in which a groove 3 is provided and both flanges 1A and 2A are connected to each other via a liquid packing 4 (Japanese Utility Model Laid-Open No. 62-32262), and further, as shown in FIG. On the mating surfaces of the members 1 and 2, the fitting groove 5 of the O-ring 4 which surrounds the fluid passage 3 in an annular shape, the filling groove 7 of the liquid gasket 6 on the outer peripheral side of the fitting groove 5, the filling groove 7 and the above-mentioned An escape groove 8 of the liquid gasket 6 is formed between the fitting groove 5 and the two members 1 and 2 by fastening bolts (not shown) inserted into fastening bolt holes provided on both sides of the fluid passage 3. Structures that have been fastened (Actual exploitation Sho 63-19 8866).

[0004]

[Problems to be solved by the device]

 However, in the conventional example shown in FIG. 6, as shown in FIG. 7, when the pair of pipes 1 and 2 are connected, the liquid packing 3 extruded outward from both joint surfaces 1b and 2b causes no problem. However, the liquid packing 3 extruded inward enters the inside of the holes 1a and 2a and closes the openings of the holes 1a and 2a. As a result, the liquid packing 3 blocks the communication between the holes 1a and 2a.

Further, in the conventional example shown in FIG. 8, as shown in FIG. 9, since the pipes 1 and 2 have small wall thicknesses, respectively, the size of the circumferential groove 3, particularly the groove width thereof, can be increased. Can not. Therefore, as in the conventional example shown in FIGS. 6 and 7, the inwardly extruded liquid packing 4 blocks the communication between the holes 1a and 2a. Therefore, if the groove width of the circumferential groove 3 is made large to eliminate the above-mentioned drawbacks, it is necessary to provide a flange 5 as shown by a one-dot chain line at the joint between the pipes 1 and 2, and However, there is a drawback that the shape becomes large.

Further, although the conventional examples shown in FIGS. 10 and 11 can be applied to joining between large members which can take a large mating surface area, both of the pipes having thin wall thickness can be applied. There is a problem that it cannot be applied to joining.

[0007]

[Means for solving problems]

 The present invention has been made in order to solve the above-mentioned problems of the related art. Even when joining thin-walled pipes, it is possible to connect the holes in a communicating state. The purpose of this is to provide a protruding plug portion that communicates with the hole on the joint surface of the pipe, and at the same time, connect the plug portion to the joint surface of the other pipe. A joint structure of pipes is characterized in that a socket portion to be fitted is provided, and the joint surfaces of the both pipes are hermetically joined by a liquid packing.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is an exploded perspective view showing a main part of the joining structure according to the present invention, FIG. 2 is a longitudinal sectional view of the joining structure before joining, FIG. 3 is a longitudinal sectional view after the joining, and FIG. 4 is joining. FIG. 5 is a vertical sectional view of another embodiment of one pipe, and FIG. 5 is a vertical sectional view showing still another embodiment of one pipe to be joined.

In the figure, reference numerals 14 and 15 denote a pair of connecting pipes, which are, for example, a mating portion between a filter body and a cylinder body in a partial return portion of an oil filter, particularly a partial filter. Pores 14b and 15b that open to the contact surfaces 14a and 15a are formed at the centers of the respective.

Reference numeral 16 denotes a cylindrical plug portion, which projects from the joint surface 14 a of the one pipe 14 to be connected. At the center of the plug portion 16, a thin plug having the same diameter as the pore 14 b of the pipe 14 is provided. It has a hole 16b, and a male screw portion 16a is engraved on the base. Then, the male screw portion 16a of the plug portion 16 is screwed and fixed to the female screw portion 14c formed on the joint surface 14a of the thin tube 14. Further, a socket portion 17 into which the plug portion 16 is fitted is formed on the joint surface 15a of the other pipe 15 connected to the pipe 14.

Therefore, as shown in FIG. 2, after applying the liquid packing 18 to both or one of the joint surfaces 14 a and 15 a of the pair of pipes 14 and 15, the plug portion 16 is inserted into the socket portion 17. , The joint surfaces 14a and 15a are brought into contact with each other. At this time, the liquid packing 18 pressed by the joint surfaces 14a and 15a and directed inward enters the gap between the plug portion 16 and the socket portion 17, but this gap is so small that it cannot be penetrated. Even if it does, or even if it enters, the gap system path, that is, the path from the bonding surfaces 14a, 15a to the pores 15b is lengthened by the length of the plug portion 16, as shown in FIG. It flows only halfway. Therefore, the liquid packing 18 does not enter the pores 15b and is pushed out of the tubes 14 and 15.

Further, since the pair of pipes 14 and 15 has a structure in which the plug portion 16 is inserted and connected to the socket portion 17, the positioning at the time of connecting the both pipes 14 and 15 becomes easy, and both the narrow holes 14b are formed. , 15b are easily connected coaxially.

FIG. 4 shows another embodiment of the plug portion 16 in which the base portion of the plug portion 16 is press-fitted and fixed in the recess formed in the joint surface 14a of the pipe 14. This is the same as the above embodiment. Further, the plug portion 16 of a further different embodiment shown in FIG. 5 has a structure integrally formed with the pipe 14, and the other points are the same as the above embodiments.

[0014]

[Effect of device]

 As described above, in the pipe joint structure according to the present invention, when the plug portion communicating with the hole is provided on the joint surface of the pipe, the plug portion is formed on the joint surface of the other pipe to be connected with the plug portion. Since a socket part that fits together is provided and both pipes are hermetically joined at the joint surface with liquid packing, even thin pipes with a thin wall can be connected without blocking the pores. In addition, there are various effects that the positioning can be easily done by fitting the plug part and the socket part, and both pores can be coaxially connected without requiring skill.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a pipe joining structure according to the present invention.

FIG. 2 is a vertical sectional view of the same structure before joining.

FIG. 3 is a vertical cross-sectional view of the same structure after joining.

FIG. 4 is a vertical sectional view showing another embodiment of the same structure.

FIG. 5 is a vertical sectional view showing still another embodiment of the same structure.

FIG. 6 is a vertical cross-sectional view of a conventional pipe connection structure before joining.

FIG. 7 is a vertical cross-sectional view after joining the connection structure.

FIG. 8 is a vertical cross-sectional view showing another embodiment of a conventional pipe connection structure before joining.

FIG. 9 is a vertical cross-sectional view of the same joining structure after joining.

FIG. 10 is a sectional view of an essential part showing a conventional casing seal structure.

FIG. 11 is a cross-sectional view of essential parts showing a conventional seal structure for an oil pump housing.

[Explanation of symbols]

 14 Pipe 14a Joining Surface 14b Pore 15 Pipe 15a Joining Surface 15b Pore 16 Plug Part 16a Male Thread Part 16b Pore 17 Socket Part 18 Liquid Packing

Claims (1)

[Scope of utility model registration request] 1. When a plug portion communicating with a hole is provided in a protruding manner on a joint surface of a pipe, a socket portion to which the plug portion is fitted is provided on a joint surface of the other pipe connected to the pipe portion. A pipe joint structure characterized in that a pipe is hermetically joined at its joint surface with a liquid packing.