Corrugated expansion type rotary joint

Abstract

The utility model discloses a bellow expansion type rotary joint which comprises a rotary joint body. A first connecting pipe; one end of the second connecting pipe is arranged in the first connecting pipe; the first annular piece is arranged on the outer surface of the end, located in the first connecting pipe, of the second connecting pipe; the outer surface of the second connecting pipe is sleeved with the connecting cylinder, and the second annular piece is arranged on the inner wall face of the first connecting pipe; the two ends of the corrugated pipe are connected with the end faces, close to each other, of the third annular pieces respectively, one end of the second connecting pipe can slide into the first connecting pipe, installation can still be carried out when the distance between the equipment pipeline and the medium pipeline is too small, meanwhile, the second connecting pipe can drive one third annular piece to move when moving, and installation is convenient. The corrugated pipe is compressed through the compression device, under the action of the corrugated pipe, raw materials in the pipeline can still be conveyed normally, and convenience is brought to people.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, in particular to a corrugated expansion type rotary joint. Background Art

[0002] A rotary joint is a connection and sealing device that transports fluid media from a stationary pipeline to a rotating or reciprocating device, thereby providing heating or cooling media for the rotating mechanism. When a rotary joint is used, one end is connected to the medium pipeline and the other end is connected to the equipment pipeline.

[0003] The axial length of common rotary joints currently cannot be adjusted, which reduces the versatility of rotary joints when used. For example, after the medium pipeline and the equipment are installed, if the axial distance between the medium pipeline and the equipment pipeline is too small during installation of the rotary joint, the two ends of the rotary joint cannot be connected, and the medium pipeline needs to be reinstalled or the equipment needs to be moved. Utility Model Content

[0004] In order to solve the above problems, that is, to solve the problems raised by the above background technology, the utility model proposes a corrugated expansion type rotary joint, including:

[0005] a first connecting pipe;

[0006] a second connecting pipe, one end of which is disposed in the first connecting pipe;

[0007] a first annular member, provided on the outer surface of one end of the second connecting pipe located inside the first connecting pipe;

[0008] A connecting tube, which is sleeved on the outer surface of the second connecting tube, and one end of which is in contact with an end surface of the first annular member, and the connecting tube is connected to the first connecting tube by bolts;

[0009] A second annular member, disposed on the inner wall surface of the first connecting pipe;

[0010] There are two third annular members, both of which are arranged between the first annular member and the second annular member;

[0011] The two ends of the bellows are respectively connected to the end surfaces of a pair of third annular members close to each other;

[0012] The compression spring is sleeved on the outer side of the bellows, and its two ends are respectively fixedly connected to the end surfaces of a pair of third annular members close to each other.

[0013] Preferably, a pair of end faces of the third annular members that are away from each other are both provided with sealing gaskets, one end face of one sealing gasket contacts one end face of the first annular member, and one end face of the other sealing gasket contacts one end face of the second annular member.

[0014] Preferably, a first annular groove is formed on the circumferential surface of the third annular member, a first sealing ring is provided in the first annular groove, and an outer surface of the first sealing ring contacts with an inner wall surface of the first connecting pipe.

[0015] Preferably, a pair of second annular grooves are formed on the inner wall surface of the connecting tube, a second sealing ring is provided in the second annular groove, and an inner surface of the second sealing ring contacts with an outer surface of the second connecting tube.

[0016] Preferably, a pair of third annular grooves are formed on the inner wall surface of the first connecting tube close to one end of the connecting tube, a third sealing ring is arranged in the third annular groove, and the inner surface of the third sealing ring contacts the outer surface of the connecting tube.

[0017] The beneficial technical effect of the utility model is that one end of the second connecting pipe can slide into the first connecting pipe, which is convenient for installation when the distance between the equipment pipeline and the medium pipeline is too small. At the same time, when the second connecting pipe moves, it can drive a third annular member to move, so that it compresses the corrugated pipe. Under the action of the corrugated pipe, the raw materials in the pipeline can still be transported normally.

[0018] At the same time, under the action of the compression spring, an opposite force can be applied to the pair of third ring members, so that the pair of third ring members can be respectively fitted with the first ring member and the second ring member, so as to facilitate the transportation of the raw materials;

[0019] At the same time, under the action of the first sealing ring, the second sealing ring and the third sealing ring, the sealing quality of the overall device can be improved, the leakage of raw materials can be prevented, and convenience can be brought to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the front cross-sectional structure of the utility model is shown.

[0021] Figure 2 The utility model is shown Figure 1 Schematic diagram of the enlarged structure of part A.

[0022] Figure 3 The utility model is shown Figure 1 Schematic diagram of the enlarged structure of part B.

[0023] Figure numerals: 1, first connecting pipe, 2, second connecting pipe, 3, first annular member, 4, connecting tube, 5, second annular member, 6, third annular member, 7, bellows, 8, compression spring, 9, sealing gasket, 10, first annular groove, 11, first sealing ring, 12, second annular groove, 13, second sealing ring, 14, third annular groove, 15, third sealing ring. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0025] The utility model provides a corrugated expansion type rotary joint, comprising:

[0026] A first connecting pipe 1;

[0027] A second connecting pipe 2, one end of which is arranged in the first connecting pipe 1;

[0028] A first annular member 3 is provided on the outer surface of one end of the second connecting pipe 2 located inside the first connecting pipe 1;

[0029] The first annular member 3 is fixedly mounted on the outer surface of the first connecting pipe 1 and can be fixed relatively thereto;

[0030] The connecting tube 4 is sleeved on the outer surface of the second connecting tube 2, and one end of the connecting tube 4 contacts with one end surface of the first annular member 3. The connecting tube 4 is connected to the first connecting tube 1 by bolts.

[0031] A thread groove is formed at one end of the first connecting tube 1 close to the connecting tube 4, and one end of the bolt is threadedly connected to the thread groove, so that the connecting tube 4 and the first connecting tube 1 can be relatively fixed, and the connecting tube 4 can fix the position of the second connecting tube 2;

[0032] The second annular member 5 is arranged on the inner wall surface of the first connecting pipe 1;

[0033] The outer surface of the second annular member 5 is welded to the inner wall of the first connecting pipe 1 so as to be relatively fixed;

[0034] The third annular member 6 is two in number and is disposed between the first annular member 3 and the second annular member 5;

[0035] The two ends of the bellows 7 are respectively connected to the end surfaces of a pair of third annular members 6 close to each other;

[0036] The two ends of the bellows 7 are respectively fixedly connected to the end faces of a pair of third annular members 6 close to each other, so as to be relatively fixed and at the same time make the pair of third annular members 6 communicate with each other;

[0037] The compression spring 8 is sleeved on the outer side of the bellows 7, and its two ends are respectively fixedly connected to the end surfaces of a pair of third annular members 6 close to each other;

[0038] The compression spring 8 can apply an opposite force to the pair of third annular members 6 respectively, so that the third annular members 6 move in opposite directions and fit with one end surface of the first annular member 3 and the second annular member 5 respectively.

[0039] Specifically, a pair of end faces of the third annular members 6 that are away from each other are both provided with sealing gaskets 9, one end face of one sealing gasket 9 contacts one end face of the first annular member 3, and one end face of the other sealing gasket 9 contacts one end face of the second annular member 5;

[0040] A pair of sealing gaskets 9 are respectively bonded to the end faces of a pair of third ring parts 6 that are away from each other, and are respectively in contact with one end face of the first ring part 3 and the second ring part 5, which can improve the sealing performance of the contact between one end face of the pair of third ring parts 6 and one end face of the first ring part 3 and one end face of the second ring part 5.

[0041] Specifically, a first annular groove 10 is formed on the circumferential surface of the third annular member 6, a first sealing ring 11 is arranged in the first annular groove 10, and an outer surface of the first sealing ring 11 contacts the inner wall surface of the first connecting pipe 1;

[0042] The first sealing ring 11 can improve the sealing performance between the circumferential surface of the third annular member 6 and the inner wall surface of the first connecting pipe 1 to prevent water leakage and rust of the compression spring 8 .

[0043] Specifically, a pair of second annular grooves 12 are formed on the inner wall surface of the connecting tube 4, and a second sealing ring 13 is arranged in the second annular groove 12, and the inner surface of the second sealing ring 13 contacts the outer surface of the second connecting tube 2;

[0044] The second sealing ring 13 can improve the sealing between the connecting tube 4 and the second connecting pipe 2 to prevent water leakage.

[0045] Specifically, a pair of third annular grooves 14 are formed on the inner wall surface of the first connecting tube 1 close to one end of the connecting tube 4, and a third sealing ring 15 is arranged in the third annular groove 14, and the inner surface of the third sealing ring 15 contacts the outer surface of the connecting tube 4;

[0046] The third sealing ring 15 can ensure the sealing between the first connecting pipe 1 and the connecting tube 5 to prevent water leakage.

[0047] Working principle: When the second connecting pipe 2 rotates, the compression spring 8 can exert a force on a third annular member 6 to make it fit with the first annular member 3 to prevent leakage. At the same time, the first sealing ring 11 can prevent the transported raw materials from leaking and corroding the compression spring 8, causing it to rust and be damaged and unable to be used normally. The second sealing ring 13 can improve the sealing between the second connecting pipe 2 and the connecting tube 4 to prevent leakage. The third sealing ring 13 can improve the sealing between the connecting tube 4 and the second connecting pipe 2 to prevent leakage. At the same time, the bolts can facilitate the staff to disassemble and assemble the connecting tube 4 and the first connecting pipe 1, bringing convenience to people.

[0048] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0049] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0051] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0052] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. Bellows expansion rotary joint, characterized in that: include; A first connecting pipe (1); A second connecting pipe (2), one end of which is arranged inside the first connecting pipe (1); A first annular member (3) is provided on the outer surface of one end of the second connecting pipe (2) located inside the first connecting pipe (1); A connecting tube (4) is sleeved on the outer surface of the second connecting tube (2), and one end of the connecting tube is in contact with an end surface of the first annular member (3). The connecting tube (4) is connected to the first connecting tube (1) by means of bolts; A second annular member (5) is arranged on the inner wall surface of the first connecting pipe (1); Two third annular members (6) are provided between the first annular member (3) and the second annular member (5); The two ends of the bellows (7) are respectively connected to the end surfaces of a pair of third annular members (6) close to each other; The compression spring (8) is sleeved on the outer side of the bellows (7), and its two ends are respectively fixedly connected to the end surfaces of a pair of third annular members (6) close to each other.

2. The bellows expansion rotary joint according to claim 1, characterized in that: A pair of end faces of the third annular members (6) that are away from each other are both provided with sealing gaskets (9), one end face of one of the sealing gaskets (9) contacts one end face of the first annular member (3), and one end face of the other of the sealing gaskets (9) contacts one end face of the second annular member (5).

3. The bellows expansion rotary joint according to claim 1, characterized in that: A first annular groove (10) is formed on the circumferential surface of the third annular member (6), a first sealing ring (11) is arranged in the first annular groove (10), and an outer surface of the first sealing ring (11) contacts an inner wall surface of the first connecting pipe (1).

4. The bellows expansion rotary joint according to claim 1, characterized in that: A pair of second annular grooves (12) are formed on the inner wall surface of the connecting tube (4), a second sealing ring (13) is arranged in the second annular groove (12), and the inner surface of the second sealing ring (13) contacts the outer surface of the second connecting tube (2).

5. The bellows expansion rotary joint according to claim 1, characterized in that: A pair of third annular grooves (14) are formed on the inner wall surface of the first connecting tube (1) close to one end of the connecting tube (4), and a third sealing ring (15) is arranged in the third annular groove (14). The inner surface of the third sealing ring (15) contacts the outer surface of the connecting tube (4).

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