CN216555773U - Connecting structure of stainless steel pipe - Google Patents

Abstract

The utility model discloses a connecting structure of stainless steel pipes, which comprises: the device comprises a first pipe, a second pipe and a sleeve, wherein the end part of the first pipe and the end part of the second pipe are respectively inserted from two ports of the sleeve; the sleeve is provided with a plurality of fixing parts, and the fixing parts fix the first pipe, the second pipe and the sleeve; a first sealing ring is arranged between the sleeve and the first pipe, and a second sealing ring is arranged between the sleeve and the second pipe. Under the condition that the connecting end of the stainless steel pipe is not processed, the structure can connect two stainless steel pipes and ensure the sealing performance of the connecting part.

Description

Connecting structure of stainless steel pipe

Technical Field

The utility model relates to the technical field of pipeline transportation, in particular to a connecting structure of stainless steel pipes.

Background

The stainless steel pipe is a hollow long-strip round steel material, and is mainly widely used for industrial conveying pipelines, mechanical structural parts and the like of petroleum, chemical industry, medical treatment, food, light industry, mechanical instruments and the like. When the stainless steel pipe is used, because the length of the stainless steel pipe is limited, a plurality of stainless steel pipes are often required to be connected; in the existing connecting piece, in order to ensure the connection firmness, the connecting end of the stainless steel pipe needs to be grooved, perforated and the like, and the connecting process is complicated.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a connection structure of stainless steel pipes, which can connect two stainless steel pipes without processing the connection end of the stainless steel pipes, and ensure the sealing property of the connection position.

In order to achieve the above object, the present invention adopts the following aspects,

a connecting structure of stainless steel pipes, the connecting structure comprising: the device comprises a first pipe, a second pipe and a sleeve, wherein the end part of the first pipe and the end part of the second pipe are respectively inserted from two ports of the sleeve; the sleeve is provided with a plurality of fixing parts, and the fixing parts fix the first pipe, the second pipe and the sleeve; a first sealing ring is arranged between the sleeve and the first pipe, and a second sealing ring is arranged between the sleeve and the second pipe.

Furthermore, each fixing part comprises a limiting block, the limiting block is fixed on the inner wall of the sleeve, and a square hole along the axial direction of the sleeve is formed in the limiting block; a moving rod is arranged in the sleeve and inserted into the square hole; the moving rod is provided with a first threaded hole and a second threaded hole along the radial direction of the sleeve, and the first threaded hole and the second threaded hole are positioned on two sides of the limiting block; the sleeve is provided with a first hole and a second hole; a first bolt is arranged in the first hole and screwed into the first threaded hole; a second bolt is arranged in the second hole and screwed into the second threaded hole; an annular first sealing gasket is arranged between the head of the first bolt and the sleeve; an annular second sealing gasket is arranged between the head of the second bolt and the sleeve; the first end of the moving rod is inserted into the first tube, and the second end of the moving rod is inserted into the second tube.

Still further, the first end and the second end of the movable rod are both provided with protrusions, the protrusions on the first end are in contact with the inner wall of the first pipe, and the protrusions on the second end are in contact with the inner wall of the second pipe.

Further, the protrusion is conical.

Furthermore, a first annular groove and a second annular groove are respectively formed in the inner wall of the sleeve; the first sealing ring portion is captured within the first annular groove and the second sealing ring portion is captured within the second annular groove.

Furthermore, the outer walls of the two ends of the sleeve are respectively provided with threads, and the two ends of the sleeve are respectively sleeved with a first threaded pipe and a second threaded pipe; one end, far away from the sleeve, of the first threaded pipe extends towards the center of the sleeve to form a first annular disc, a first sealing pipe is further arranged in the first threaded pipe and fixed on the first annular disc, and the first sealing pipe is located between the first pipe and the sleeve; one end, far away from the sleeve pipe, of the second threaded pipe extends towards the center of the second threaded pipe to form a second annular disc, a second sealing pipe is further arranged in the second threaded pipe and fixed on the second annular disc, and the second sealing pipe is located between the second pipe and the sleeve pipe.

Still further, along the axial direction of the sleeve, from inside to outside, the inner diameters of the two ends of the sleeve are gradually increased; the outer diameter of the first sealing pipe is gradually reduced along with the gradually increasing distance from the first annular disc; the outer diameter of the second sealing tube gradually decreases as the distance from the second annular disk gradually increases.

The connecting structure has the advantages that: 1) the structure fixes a first pipe, a second pipe and a sleeve pipe which need to be connected through a fixing part, so that the first pipe and the second pipe are connected; 2) carry out double sealing through first sealing ring, second sealing ring, first sealed tube and second sealed tube to the junction, guarantee the leakproofness of junction.

Drawings

Fig. 1 is a sectional view of the coupling structure according to the present invention for pipe coupling.

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1

Fig. 3 is a cross-sectional view of a cannula according to the present invention.

Fig. 4 is a cross-sectional view of the bushing of the present invention.

Fig. 5 is a cross-sectional view of a first threaded pipe and a second threaded pipe according to the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, the connection structure of a stainless steel pipe according to this embodiment includes: the device comprises a first pipe 1, a second pipe 2 and a sleeve 3, wherein the first pipe 1 and the second pipe 2 are stainless steel pipes which need to be connected; the end part of the first pipe 1 and the end part of the second pipe 2 are respectively inserted from two ports of the sleeve 3; the sleeve 3 is provided with a plurality of fixing parts 4, and the fixing parts 4 fix the first pipe 1, the second pipe 2 and the sleeve 3; a first sealing ring 5 is arranged between the sleeve 3 and the first pipe 1, and a second sealing ring 6 is arranged between the sleeve 3 and the second pipe 2. The inner wall of the sleeve 3 is respectively provided with a first annular groove 33 and a second annular groove 34; the first sealing ring 5 is partially captured in the first annular groove 33 and the second sealing ring 6 is partially captured in the second annular groove 34. When in use, the connecting end part of the first pipe 1 and the connecting end part of the second pipe 2 are respectively inserted from two ports of the sleeve 3, and then the first pipe 1 and the second pipe 2 are fixed by the fixing part 4 on the sleeve 3; the first sealing ring 5 and the second sealing ring 6 seal the joint. Here, the first seal ring 5 and the second seal ring 6 may be made of rubber.

As shown in fig. 1-4, specifically, each of the fixing parts 4 includes a limiting block 41, the limiting block 41 is fixed on the inner wall of the sleeve 3, the limiting block 41 is provided with a square hole 42 along the axial direction of the sleeve 3, and the square hole 42; a moving rod 43 is arranged in the sleeve 3, and the moving rod 43 is inserted in the square hole 42; a first threaded hole 431 and a second threaded hole 432 along the radial direction of the sleeve 3 are formed in the moving rod 43, and the first threaded hole 431 and the second threaded hole 432 are positioned on two sides of the limiting block 41; the sleeve 3 is provided with a first hole 31 and a second hole 32; a first bolt 44 is arranged in the first hole 31, and the first bolt 44 is screwed into the first threaded hole 431; a second bolt 45 is arranged in the second hole 32, and the second bolt 45 is screwed into the second threaded hole 432; an annular first sealing gasket 46 is arranged between the head of the first bolt 44 and the sleeve 3; an annular second sealing gasket 47 is arranged between the head of the second bolt 45 and the sleeve 3; the first end 433 of the moving bar 43 is inserted into the first pipe 1, and the second end 434 of the moving bar 43 is inserted into the second pipe 2. When the fixing part 4 is used, when the connecting end part of the first pipe 1 and the connecting end part of the second pipe 2 are respectively inserted from two ports of the sleeve 3, the pipe walls of the first pipe 1 and the second pipe 2 are ensured to be positioned between the moving rod 43 and the sleeve 3; then, by turning the first bolt 44 and the second bolt 45, the moving rod 43 is gradually brought close to the casing 3 until the first end 433 of the moving rod 43 is attached to the inner wall of the first pipe 1 and the second end 434 of the moving rod 43 is attached to the inner wall of the second pipe 2. The first gasket 46 and the second gasket 47 are made of rubber.

As shown in fig. 2 to 4, in order to prevent the first pipe 1 and the second pipe 2 from being separated from the sleeve, the first end 433 and the second end 434 of the moving rod 43 are both provided with protrusions 48, and the protrusions 48 on the first end 433 contact with the inner wall of the first pipe 1 and the protrusions 48 on the second end 434 contact with the inner wall of the second pipe 2. Here, the protrusion 48 is conical, and may be formed in a long strip shape and have an arc shape, and the upper surface thereof may be attached to the inner wall of the first pipe 1 and the inner wall of the second pipe 2.

In order to further improve the sealing performance of the joint, as shown in fig. 1, 2 and 5, the outer walls of the two ends of the sleeve 3 are respectively provided with threads, and the two ends of the sleeve 3 are respectively sleeved with a first threaded pipe 7 and a second threaded pipe 8; one end of the first threaded pipe 7, which is far away from the sleeve 3, extends towards the center of the first threaded pipe to form a first annular disc 71, a first sealing pipe 72 is further arranged in the first threaded pipe 7, the first sealing pipe 72 is fixed on the first annular disc 71, and the first sealing pipe 72 is positioned between the first pipe 1 and the sleeve 3; one end of the second threaded pipe 8, which is far away from the sleeve 3, extends towards the center of the second threaded pipe to form a second annular disc 81, a second sealing pipe 82 is further arranged in the second threaded pipe 8, the second sealing pipe 82 is fixed on the second annular disc 81, and the second sealing pipe 82 is located between the second pipe 2 and the sleeve 3. Before the connecting end part of the first pipe 1 and the connecting end part of the second pipe 2 are respectively inserted from two ports of the sleeve 3, the first threaded pipe 7 is sleeved on the first pipe 1, the second threaded pipe 8 is sleeved on the second pipe 2, then the first pipe 1 and the second pipe 2 are inserted into the sleeve 3, after the first pipe 1 and the second pipe 2 are fixed by the fixing part 4, the first threaded pipe 7 and the second threaded pipe 8 are screwed on the sleeve 3, the first sealing pipe 72 is pushed between the first pipe 1 and the sleeve 3 by the first annular disc 71, and the second sealing pipe 82 is pushed between the second pipe 2 and the sleeve 3 by the second annular disc 81.

In order to improve the sealing effect, it is also convenient to push the first sealing tube 72 between the first tube 1 and the sleeve 3 and to push the second sealing tube 82 between the second tube 2 and the sleeve 3; the inner diameters of two ends of the sleeve 3 are gradually increased from inside to outside along the axial direction of the sleeve 3; the outer diameter of the first sealing tube 72 gradually decreases as the distance from the first annular disc 71 gradually increases; the outer diameter of the second sealing tube 82 gradually decreases as the distance from the second annular disk 81 gradually increases.

When the connecting structure is used, the first threaded pipe 7 is sleeved on the first pipe 1, the second threaded pipe 8 is sleeved on the second pipe 2, the connecting end part of the first pipe 1 and the connecting end part of the second pipe 2 are respectively inserted into two ports of the sleeve 3, and the pipe walls of the first pipe 1 and the second pipe 2 are ensured to be positioned between the moving rod 43 and the sleeve 3; then, by turning the first bolt 44 and the second bolt 45, the moving rod 43 is gradually brought close to the sleeve 3 until the projection 48 on the first end 433 of the moving rod 43 is attached to the inner wall of the first pipe 1 and the projection 48 on the second end 434 of the moving rod 43 is attached to the inner wall of the second pipe 2; screwing the first 7 and second 8 threaded pipes onto the sleeve 3, said first annular disc 71 pushing the first sealing pipe 72 between the first pipe 1 and the sleeve 3, said second annular disc 81 pushing the second sealing pipe 82 between the second pipe 2 and the sleeve 3; namely, the connection of the steel pipes is completed.

Claims (7)

1. A connecting structure of stainless steel pipes, characterized in that the connecting structure comprises: the device comprises a first pipe (1), a second pipe (2) and a sleeve (3), wherein the end part of the first pipe (1) and the end part of the second pipe (2) are respectively inserted from two ports of the sleeve (3); the sleeve (3) is provided with a plurality of fixing parts (4), and the fixing parts (4) fix the first pipe (1), the second pipe (2) and the sleeve (3); a first sealing ring (5) is arranged between the sleeve (3) and the first pipe (1), and a second sealing ring (6) is arranged between the sleeve (3) and the second pipe (2).

2. The connecting structure of stainless steel pipes according to claim 1, characterized in that: each fixing part (4) comprises a limiting block (41), the limiting blocks (41) are fixed on the inner wall of the sleeve (3), and square holes (42) along the axial direction of the sleeve (3) are formed in the limiting blocks (41); a moving rod (43) is arranged in the sleeve (3), and the moving rod (43) is inserted into the square hole (42); a first threaded hole (431) and a second threaded hole (432) along the radial direction of the sleeve (3) are formed in the moving rod (43), and the first threaded hole (431) and the second threaded hole (432) are positioned on two sides of the limiting block (41); the sleeve (3) is provided with a first hole (31) and a second hole (32); a first bolt (44) is arranged in the first hole (31), and the first bolt (44) is screwed into the first threaded hole (431); a second bolt (45) is arranged in the second hole (32), and the second bolt (45) is screwed into the second threaded hole (432); an annular first sealing gasket (46) is arranged between the head of the first bolt (44) and the sleeve (3); an annular second sealing gasket (47) is arranged between the head of the second bolt (45) and the sleeve (3); the first end (433) of the moving rod (43) is inserted into the first tube (1), and the second end (434) of the moving rod (43) is inserted into the second tube (2).

3. The connecting structure of stainless steel pipes according to claim 2, characterized in that: bulges (48) are arranged at the first end (433) and the second end (434) of the moving rod (43), the bulges (48) at the first end (433) are in contact with the inner wall of the first pipe (1), and the bulges (48) at the second end (434) are in contact with the inner wall of the second pipe (2).

4. The stainless steel pipe connection structure according to claim 3, wherein: the bulge (48) is conical.

5. The connecting structure of stainless steel pipes according to claim 1, characterized in that: the inner wall of the sleeve (3) is provided with a first annular groove (33) and a second annular groove (34) respectively; the first sealing ring (5) is partially clamped in the first annular groove (33), and the second sealing ring (6) is partially clamped in the second annular groove (34).

6. The connection structure of stainless steel pipes according to claim 1, wherein: the outer walls of two ends of the sleeve (3) are respectively provided with threads, and a first threaded pipe (7) and a second threaded pipe (8) are respectively sleeved at two ends of the sleeve (3); one end, far away from the sleeve (3), of the first threaded pipe (7) extends towards the center of the first threaded pipe to form a first annular disc (71), a first sealing pipe (72) is further arranged in the first threaded pipe (7), the first sealing pipe (72) is fixed on the first annular disc (71), and the first sealing pipe (72) is located between the first pipe (1) and the sleeve (3); one end, far away from the sleeve (3), of the second threaded pipe (8) extends towards the center of the second threaded pipe to form a second annular disc (81), a second sealing pipe (82) is further arranged in the second threaded pipe (8), the second sealing pipe (82) is fixed to the second annular disc (81), and the second sealing pipe (82) is located between the second pipe (2) and the sleeve (3).

7. The structure for connecting stainless steel pipes according to claim 6, wherein: the inner diameter of the two ends of the sleeve (3) is gradually increased from inside to outside along the axial direction of the sleeve (3); the outer diameter of the first sealing pipe (72) is gradually reduced as the distance from the first annular disc (71) is gradually increased; the outer diameter of the second sealing pipe (82) is gradually reduced as the distance from the second annular disc (81) is gradually increased.

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