Pipe connecting assembly

Abstract

The utility model provides a pipe connecting assembly which comprises a pipe body, a connecting joint used for being arranged on the pipe body in a sleeved mode and a locking piece used for fixing the pipe body to the connecting joint, the pipe body is provided with a limiting table with a conical inclined face, the limiting table and the pipe body are integrally formed, and the connecting joint is arranged on the pipe body. The front end face of the limiting table is provided with an arc-shaped connecting face matched with the connector, a sealing rubber ring is arranged between the limiting table and the connector, the rear end face of the limiting table is provided with a conical inclined face, the pipe body is sleeved with a nut, the nut is located at the rear end of the limiting table, and the conical inclined face is matched with the conical face of the bottom of the nut. The arc-shaped connecting surface of the limiting table is matched with the connecting joint, and the limiting table and the pipe main body are integrally formed through cold stamping, so that the pipe has high strength and high reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical connection structure technical field, concretely relates to a pipe sealing connection subassembly. BACKGROUND

[0002] Pipe is used as the pipeline of conveying fluid, is widely used in petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument and so on industrial material conveying and mechanical structure component industry. The pipe usually selects the steel billet of acid -resistant and heat -resistant brand, is formed after heating, perforating, sizing, hot rolling, cutting.

[0003] When connecting two or more pipe, the pipe connection subassembly usually adopts sleeve installation, that is, the pipe is sleeved in the sleeve, and is fixedly connected through pipe body deformation or bolt locking, or further sets a sealing ring between the pipe and the sleeve, or welds a boss on the pipe to enhance the sealing effect. The above conventional technical scheme not only has low strength but also poor sealing performance. UTILITY MODEL CONTENTS

[0004] The utility model discloses a pipe connection subassembly structure, solve the problem of low pipe connection strength and poor sealing performance, low field construction efficiency.

[0005] The utility model adopts the following schemes:

[0006] A pipe connection subassembly, including pipe body, the connecting joint of sleeve connection in pipe body pipe mouth, the locking piece of fixing pipe body on connecting joint, the limit platform is arranged on pipe body, and the limit platform is integrally formed with pipe body, and the arc -shaped connecting surface that cooperates with connecting joint is established to the one side of limit platform close to connecting, and the other side of limit platform is equipped with the taper inclined surface, the nut is sleeved on pipe body, and the taper inclined surface cooperates with the bottom end surface of nut, and the nut cooperates with connecting joint through the thread cooperation, and the limit platform is located in the internal cavity formed after the cooperation of nut and connecting joint, to fix pipe body on connecting joint.

[0007] As a further improvement, the arc-shaped connecting surface includes a first inclined surface, a second arc-shaped surface, a third cylindrical surface, a fourth arc-shaped surface, a fifth flat surface, and a sixth cylindrical surface in order from the pipe mouth position of the pipe body to the position away from the pipe mouth, the second arc-shaped surface is outwardly convex, the second arc-shaped surface and the third arc-shaped surface are smoothly connected, the third cylindrical surface and the fourth arc-shaped surface are smoothly connected, the fourth arc-shaped surface is inwardly concave, the fourth arc-shaped surface and the fifth flat surface are connected, and the fifth flat surface and the sixth cylindrical surface are connected perpendicularly.

[0008] As a further improvement, the pipe body is further provided with a first sleeve portion on the side connected with the connecting joint, and the first sleeve portion extends towards the connecting joint.

[0009] As a further improvement, the included angle between the second arc surface and the outer wall of the pipe body is 10° to 14°, in particular, the second arc surface is longitudinally cut to form an arc, and the tangent line of any point on the arc has an included angle of 10° to 14° with the outer wall of the pipe body.

[0010] As a further improvement, the included angle between the tapered inclined surface of the limiting platform away from the side connected with the connecting joint and the outer wall of the pipe body is 130° to 140°, and a groove can be further arranged therebetween to reduce the amount of material accumulation.

[0011] As a further improvement, the tapered inclined surface of the limiting platform is connected with the pipe body by an inner concave arc surface to reduce the deformation stress.

[0012] By adopting the above technical scheme, the following technical effects can be achieved:

[0013] The pipe connecting assembly of the utility model, through the cooperation of the connecting arc surface of the limiting platform and the connecting joint, forms a metal wire seal, increases the sealing performance, and the limiting platform is integrally formed by cold stamping, which can increase the strength of the limiting platform and prevent the occurrence of gaps at the connecting part during locking to affect the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2 It is the top view structural schematic diagram of the utility model;

[0017] Figure 3 It is the partial enlarged view of the top view structure of the utility model;

[0018] Figure 4 It is the symmetrical sectional view structural schematic diagram of the pipe body of the utility model;

[0019] Label:1, pipe main body;2, connecting joint;21, first inner taper surface;3, nut;31, second inner taper surface;4, limit table;41, arc connecting surface;411, first inclined surface;412, second arc surface;413, third cylindrical surface;414, fourth arc surface;415, fifth plane;416, sixth cylindrical surface;42, tapered inclined surface;421, concave arc surface;422, groove;43, first sleeve part. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be understood that the terms "front end", "rear end", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] Embodiment 1: combination Figures 1 to 4 The utility model provides a kind of pipe connecting assembly, including pipe main body 1, connecting joint 2 and nut 3, pipe main body 1 is set in connecting joint 2, nut 3 is fixed with connecting joint 2 by thread cooperation, and pipe main body 1 is fixed on connecting joint 2.

[0026] For simplicity, the left end of pipe main body 1 in the drawing is the pipe opening position, so it is also called the front end of pipe main body 1, and the right end is also called the rear end of pipe main body 1.

[0027] Referring to Figure 1 And Figure 2 The limiting table 4 is provided on the pipe main body 1 at the position of being set in the connecting joint 2, and the limiting table 4 can be fixed in the internal space formed after the connecting joint 2 is locked with the nut 3. Preferably, the limiting table 4 is integrally formed with the pipe main body 1, and when the pipe main body 1 is made of carbon steel, stainless steel or copper, etc., it can be pressed by cold stamping, and when the pipe main body 1 is a plastic product, it can be formed by injection molding, blow molding or casting. Integrally formed can improve the strength between the limiting table 4 and the pipe main body 1, prevent gaps at the connection during locking, and thus affect the sealing effect. Referring to Figures 1 to 4 The front end face of the limiting table 4 is provided with an arc-shaped connecting surface 41 matched with the connecting joint 2, and the arc-shaped connecting surface (41) is matched with the first inner conical surface (21) in the connecting joint (2). In the locked state, the compression degree between the arc-shaped connecting surface 41 and the connecting joint 2 is large, and the fit between them is more closely. Specifically, as shown inFigure 3 The arc-shaped connecting surface 41 comprises, in sequence from the front end to the rear end of the pipe body 1, a first inclined surface 411, a second arc-shaped surface 412, a third cylindrical surface 413, a fourth arc-shaped surface 414, a fifth flat surface 415, and a sixth cylindrical surface 416. The second arc-shaped surface 412 is outwardly convex in shape and is smoothly connected to the third cylindrical surface 413, which is smoothly connected to the fourth arc-shaped surface 414. The fourth arc-shaped surface 414 is inwardly concave in shape and is connected to the fifth flat surface 415, which is perpendicularly connected to the sixth cylindrical surface 416.

[0028] The first inclined surface 411 serves as a guide when the pipe body 1 is inserted into the connecting joint 2. The second arc-shaped surface 412 and the third cylindrical surface 413 are smoothly connected, so that no compression dead angle is formed during fitting, thereby making the sealing more reliable.

[0029] The third cylindrical surface 413 is connected to the fifth flat surface 415 via the fourth arc-shaped surface 414, which is inwardly concave in shape to reduce the stress of deformation.

[0030] Further, the pipe body 1 is provided with a first sleeve portion 43 at the front end of the limiting platform 4. The first sleeve portion 43 serves as a guide and makes the appearance of the pipe body 1 more attractive. The length ratio of the first sleeve portion 43 to the limiting platform 4 is 0.3:1 to 0.6:1, so that the first sleeve portion 43 does not protrude out of the front end of the connecting joint 2 or does not serve as a guide.

[0031] Referring to Figures 2 to 4 The front end surface of the limiting platform 4 is provided with a tapered arc surface 412, which has an arc that matches the first inner tapered surface 21 inside the connecting joint 2. Figure 3 As shown in the enlarged view, the longitudinal section of the tapered arc surface 412 is arc-shaped. The angle between the tangent of any point on the arc and the outer wall of the pipe body 1 is 10° to 14°. In other words, the angle between the tapered arc surface 412 and the outer wall of the pipe body 1 is 10° to 14°. During the matching process, the frictional force between the two is optimal in terms of the vertical shear force, which is conducive to improving the sealing performance and preventing loosening.

[0032] In this embodiment, the rear end surface of the limiting platform 4 is provided with a tapered inclined surface 42, which matches the second inner tapered surface 31 inside the nut 3. Specifically, the inclined angle of the tapered inclined surface 42 is complementary to the second inner tapered surface 31 of the nut 3, which can better lock the pipe body 1 on the connecting joint 2 and improve the sealing performance. Figure 3 As shown, the tapered inclined surface 42 comprises two sections, and a groove 422 is arranged between the two sections. The tapered inclined surface 42 is connected to the pipe body 1 via an inwardly concave arc surface 421 to reduce the stress of deformation.

[0033] The preferred embodiments of the present application have been described above with the preferred embodiments, the protection scope of the present application is not only limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present application belong to the protection scope of the present application.

Claims

1. A pipe connecting assembly, characterized in that: it comprises a pipe body (1), a connecting joint (2) sleeved on the pipe body (1), and a nut (3) for fixing the pipe body (1) on the connecting joint (2); a limiting table (4) is arranged on the pipe body (1) and is integrally formed with the pipe body (1); an arc-shaped connecting surface (41) is arranged on the front end surface of the limiting table (4) and cooperates with the connecting joint (2); the arc-shaped connecting surface (41) comprises, in sequence from the front end to the rear end, a first inclined surface (411), a second arc-shaped surface (412), a third cylindrical surface (413), a fourth arc-shaped surface (414), a fifth flat surface (415), and a sixth cylindrical surface (416); the second arc-shaped surface (412) is outwardly convex in an arc shape; the second arc-shaped surface (412) and the third cylindrical surface (413) are smoothly connected; the third cylindrical surface (413) and the fourth arc-shaped surface (414) are smoothly connected; the fourth arc-shaped surface (414) is concave in an arc shape; the fourth arc-shaped surface (414) is connected with the fifth flat surface (415); and the fifth flat surface (415) and the sixth cylindrical surface (416) are perpendicularly connected; a tapered inclined surface (42) is arranged on the rear end surface of the limiting table (4) and cooperates with a second inner tapered surface (31) in the nut (3).

2. The pipe coupling assembly according to claim 1, wherein, a first sleeve part (43) is further arranged on the front end of the limiting table (4).

3. The pipe coupling assembly of claim 2, wherein, the included angle between the second arc-shaped surface (412) and the outer wall of the pipe body (1) is 10° to 14°.

4. The pipe coupling assembly according to claim 1, wherein, the tapered inclined surface (42) is connected with the arc-shaped connecting surface (41) at one end and with the pipe body (1) at the other end, wherein a concave arc surface (421) is arranged at the connecting position with the pipe body (1).

5. The pipe coupling assembly according to claim 1, wherein, the included angle between the tapered inclined surface (42) and the outer wall of the pipe body (1) is 130° to 140°.

6. The pipe coupling assembly according to claim 1, wherein, the tapered inclined surface (42) comprises two sections, and a groove (422) is arranged between the two sections.

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