TWI607171B - Pipe coupling device - Google Patents

Description

Pipe fitting device

The present invention relates to a technique for joining two pipe members, and more particularly to a pipe fitting device which can be used to assist in reinforcing the joint fixing effect of the two pipe members.

As is known in the prior art, in order to allow the two tubular members to be fixed and fixed, firstly, threads and screw holes which can be screwed to each other are formed by machining between the outer tube and the inner tube, and the force is applied by external application. The outer tube and the inner tube are more tightly screwed together to achieve the purpose of tube fitting; however, since the processing method must be processed separately between the outer tube and the inner tube, although the tight effect after screwing can be initially achieved, But it also derives the risks that other relativity must bear.

The first is that the material and pipe diameter of the outer pipe and the inner pipe are processed differently, such as metal tapping, plastic tapping, etc., but the material cost and processing time are attached to the processing method. One of the disadvantages.

The second is that when the pipe fittings of different pipe types, pipe diameters and pipe fittings are joined together, due to the different materials between the two pipes, the pipe components of one of them are severely deformed and damaged due to the different stresses generated. This will reduce the bonding density of the original two pipe fittings, and even cause the risk of reworking, which is one of the disadvantages attached to this processing method.

In view of the above-mentioned deficiencies, the main object of the present invention is to provide a reinforced solid. The effect of the pipe fitting device is used to assist in the fastening and fixing of the two pipe fittings.

In order to achieve the above object, the present invention provides a pipe fitting device, comprising: an inner pipe; a sleeve, the two ends of the sleeve are respectively defined as a first end and a second end, and the inner wall of the sleeve is adjacent to the sleeve An inner threaded section is disposed at the first end, and a fixed chamber is formed inside the sleeve near the second end, and the inner wall of the sleeve is formed inwardly at the second end to be formed with the inner wall. One of the angles pushes the top surface; a pressing sleeve is received in the fixing chamber and sleeved on the inner tube, and the pressing sleeve is formed on the outer wall of one end thereof to form a push-up shape from the end to the body portion Contacting the inclined surface, and forming a pushing surface abutting the pushing surface on the outer wall of the other end; and an outer tube partially sleeved on the inner tube, the outer tube is provided with an external thread section near the end, and is screwed In the inner threaded section of the sleeve, the inner wall of the outer tube forms an active surface which is tapered from the outer end toward the inner diameter of the outer threaded section, and the action surface is abutted against the forced surface. Close the contact slope of the casing.

The pressing sleeve is mainly used as a reinforcing fixing device for the inner tube and the outer tube, when the outer thread portion of the outer tube is screwed with the inner thread portion of the sleeve, and the tension sleeve is continuously extended at both ends When the pressing force is caused by external pressure, at this time, the pressing sleeve will be deformed by pressing and pressing the working surface, thereby making the pressing sleeve more closely fit to the The outer wall of the inner tube, and indirectly causes the inner tube to be deformed; thereby, to achieve the purpose of the tube fitting device of the present invention.

10‧‧‧Pipe fitting device

11‧‧‧Inner management

21‧‧‧ casing

22‧‧‧Threaded section

23‧‧‧ first end

24‧‧‧Fixed room

25‧‧‧ second end

26‧‧‧ pushed top surface

31‧‧‧tight casing

32‧‧‧Contact slope

34‧‧‧Recommended

41‧‧‧External management

42‧‧‧External thread section

44‧‧‧Internal section

46‧‧‧Action surface

50‧‧‧ pipe fittings

51‧‧‧Inside

61‧‧‧ casing

62‧‧‧Threaded section

71‧‧‧tight casing

72‧‧‧Contact slope

76‧‧‧Excavation site

81‧‧‧External management

82‧‧‧ External thread section

The first figure is a schematic exploded view of a first preferred embodiment of the present invention.

The second drawing is a schematic longitudinal sectional view of a first preferred embodiment of the present invention.

The third drawing is a schematic longitudinal sectional view of the first preferred embodiment of the present invention.

Figure 4 is a schematic longitudinal cross-sectional view showing a second preferred embodiment of the present invention.

Figure 5 is a longitudinal cross-sectional view showing the action of the second preferred embodiment of the present invention.

In the following, the structural device of the present invention and its features will be described in detail by way of the accompanying embodiments in conjunction with the accompanying drawings, which are described in the following. Or similar items or structural features thereof.

Referring to the first to second figures, a pipe fitting device (10) according to a first preferred embodiment of the present invention includes: an inner tube (11), a sleeve (21), a pressing sleeve (31) and an outer tube (41);

The two ends of the sleeve (21) are respectively defined as a first end (23) and a second end (25), and the inner wall of the sleeve (21) is provided with an internal thread section near the first end (23). (22), a fixing chamber (24) is formed inside the sleeve (21) near the second end (25), and an inner wall of the sleeve (21) is inward at the second end (25) Forming a top surface (26) at a predetermined angle with the inner wall; the predetermined angle is less than 180 degrees; wherein the opening diameter of the first end (23) conforms to the outer diameter of the outer tube (41), The outer tube (41) extends into the socket, and the opening of the second end (25) conforms to the outer diameter of the inner tube (11) for the inner tube (11) to extend into the socket.

The pressing sleeve (31) is received in the fixing chamber (24) and sleeved on the inner tube (11), and the pressing sleeve (31) is formed on the outer wall of one end thereof to be gradually widened from the end to the body. a contact inclined surface (32), and a pushing surface (34) abutting the pushing surface (26) on the outer wall of the other end; wherein the pressing surface of the pressing sleeve (31) (34) is pushed outward from the end of the outer wall of one end of the pressing sleeve (31) to the body portion.

The outer tube (41) is partially sleeved on the inner tube (11), and the outer tube (41) is provided with an externally threaded portion (42) near one end, and is screwed into the inner thread of the sleeve (21). a segment (22), an inner surface of the outer tube (41) forming an active surface (46) which is tapered from the outer end toward the inner diameter portion and has a push-out shape. 46) abutting against the contact inclined surface (32) of the pressing sleeve (31); wherein the inner wall of the outer tube (41) is provided with an inner blocking portion (44), the inner blocking portion (44) and the inner portion One end of the tube (11) abuts, and the inner end portion (44) is a shoulder surface formed along the circumference of the inner wall of the outer tube (41) toward the other end.

Referring to the third figure, the pressing sleeve (31) is mainly used as a reinforcing fixing device for the inner tube (11) and the outer tube (41), when the outer tube (41) is externally threaded ( 42) screwing with the internal thread section (22) of the sleeve (21), and the tensioning sleeve (31) is continuously subjected to the pressing action caused by the external pressure, at this time, the pressing The sleeve (31) will be deformed by pressing and pressing the action surface (46), thereby making the pressing sleeve (31) more closely fit to the outer wall of the inner tube (11), and indirectly The inner tube (11) is forced to deform; thereby, to achieve the purpose of the tube fitting device (10) of the present invention.

According to the above, the pipe fitting device (10) provided by the present invention has no material or structural limitation between the inner pipe (11) and the outer pipe (41); and the pipe fitting device (10) Because the sleeve (21) and the pressing sleeve (31) are pressed by the action, the sleeve (21) and the pressing sleeve (31) are more closely fitted to the inner tube (11). The outer wall, by virtue of the characteristics, the pipe fitting device (10) provided by the invention can further achieve the effects of good water tightness, airtightness and oil sealability.

Referring to FIG. 4 again, a pipe fitting device (50) according to a second preferred embodiment of the present invention is mainly similar to the first embodiment disclosed above, wherein the difference is:

A cutout portion (76) is disposed from the inner wall of one end of the pressing sleeve (71) to the other end for a predetermined straight section distance, and the cutout portion (76) is adjacent to the pressing sleeve (71) The direction of a contact bevel (72).

Please refer to the fifth figure again, because the tensioning sleeve (71) is provided with the relationship of the excavation site (76), so that the structural stress near the excavation site (76) is weakened, when the outer tube is weakened. An externally threaded section (82) of (81) is screwed to an internally threaded section (62) of the sleeve (61), and the ends of the compression sleeve (31) are continuously squeezed by external pressure. When pressing, at this time, it will be easier to cause deformation of the pressing sleeve (31), thereby making the pressing sleeve (71) more closely fit to the outer wall of the inner tube (51), and indirectly The inner tube (11) is more easily deformed, thereby achieving the purpose of the tube fitting device (50) of the present invention.

In addition to the above, the second preferred embodiment of the present invention has the same structure, operation mode, and achievable effect as the first preferred embodiment of the present invention, and other details. I will not repeat them.

Finally, it must be stated that the constituent devices or articles disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention, and alternatives or variations of other equivalent devices or articles should also be considered as the case. The scope of the patent application is covered.

10‧‧‧Pipe fitting device

11‧‧‧Inner management

21‧‧‧ casing

22‧‧‧Threaded section

26‧‧‧ pushed top surface

31‧‧‧tight casing

32‧‧‧Contact slope

34‧‧‧Recommended

41‧‧‧External management

42‧‧‧External thread section

44‧‧‧Internal section

46‧‧‧Action surface

Claims (8)

A pipe fitting device comprises: an inner pipe; a sleeve, the two ends of the sleeve are respectively defined as a first end and a second end, and an inner wall of the sleeve is provided with an internal thread near the first end a fixing chamber is formed inside the sleeve near the second end, and an inner wall of the sleeve is formed inwardly at the second end to form a predetermined angle with the inner wall of the sleeve. a top surface; a pressing sleeve is received in the fixing chamber and sleeved on the inner tube, and the pressing sleeve forms a contact slope on the outer wall of one end thereof which is gradually widened from the end to the body, and Forming a push surface on the outer wall to abut the top surface; and an outer tube is partially sleeved on the inner tube, the outer tube is provided with an externally threaded portion near the end, and is screwed to the sleeve In the inner threaded section, an inner surface of the outer tube forms an active surface which is tapered from the outer end toward the inner diameter and which is pushed out, and the acting surface abuts against the tension sleeve Contact the slope. The pipe fitting device of claim 1, wherein the predetermined angle is less than 180 degrees. The pipe fitting device according to claim 1, wherein the opening diameter of the first end conforms to the outer diameter of the outer pipe for the outer pipe to extend into the socket. The pipe fitting device according to claim 1, wherein the opening diameter of the second end conforms to the outer diameter of the inner pipe for the inner pipe to extend into the socket. The pipe fitting device according to claim 1, wherein the pressing surface of the pressing sleeve is pushed outward from the end of the outer wall of one end of the pressing sleeve to the body portion. The pipe fitting device according to claim 1, wherein a cut-out portion is disposed after the inner wall of one end of the pressing sleeve extends from the inner wall toward the other end by a predetermined straight section, and the excavation portion is adjacent to the Press the direction of the contact bevel of the bushing. The pipe fitting device according to claim 1, wherein the inner wall of the outer pipe is provided with an inner block, and the inner block abuts one end of the inner pipe. The pipe fitting device according to claim 7, wherein the inner block is along the outer pipe A shoulder surface formed by the inner wall of the inner wall toward the other end.