Bead entering type connector

Abstract

The utility model provides a bead entering type connector which comprises an inner core, a connector cap and a connector body. The connector body is provided with a sealing connecting part, the sealing connecting part comprises a central through hole penetrating through the connector body in the axial direction, a first sealing groove and a first sealing protrusion, the first sealing groove and the first sealing protrusion are arranged in the radial direction, and external threads are arranged on the outer wall of the sealing connecting part; the central through hole is used for bearing an inner core located on the end face of a pipeline, and the external threads are used for being in threaded connection with the connector cap. The upper end face of the sealing connecting part is in a big-end-down inclined plane shape, and an included angle a is formed between the inclined plane and the axis of the sealing connecting part. The outer wall face of the first sealing groove is parallel to the axis of the connector body, the inner wall face of the first sealing groove is in a big-end-down inclined face shape, an included angle b is formed between the inner wall face of the first sealing groove and the axis of the connector body, the upper end face of the first sealing protrusion is arranged to be an inclined face, and an included angle c is formed between the inclined face and the axis of the connector body. The included angle c is set to be a supplementary angle smaller than or equal to the included angle b.

Description

Technical Field

[0001] The utility model relates to the field of pipeline connection, in particular to a bead-type joint. Background Art

[0002] Fluoroplastic pipe fittings are fluid connection components used to connect fluid equipment such as pumps, valves, and filters to pipelines, or to connect pipelines to each other. Currently, pipe fittings are widely used in the manufacturing processes of various manufacturing occasions such as semiconductor manufacturing, medical / pharmaceutical manufacturing, food processing, and the chemical industry.

[0003] The current structure and usage of PFA joints is to heat the PFA tube to 300°C to soften it, cool it to shape using a PTFE expansion tool, and then fix the joint by screwing. In actual use, this structure has the probability of insufficient sealing pressure, resulting in leakage during use. Since PFA tubes are used to carry highly corrosive media, leakage seriously affects personal safety. Utility Model Content

[0004] In order to overcome the problem that the sealing pressure of the bead-in joint in the prior art is insufficient, the utility model provides a bead-in joint.

[0005] The utility model adopts the following technical solutions.

[0006] A bead-type joint comprises an inner core, a joint cap and a joint body;

[0007] The inner core is fixedly connected to one end of the pipe by hot melting;

[0008] The joint body has a sealing connection portion, which includes a central through hole extending axially through the joint body, a first sealing groove and a first sealing protrusion arranged axially, and an external thread provided on its outer wall; the central through hole is used to receive the inner core located at the end face of the pipe, and the external thread is used to threadably connect the joint cap;

[0009] The upper end surface of the sealing connection portion is in the shape of an inclined plane with a smaller upper portion and a larger lower portion, and the inclined plane forms an angle a with the axis of the sealing connection portion, and the angle a is 12° to 16°;

[0010] The outer wall surface of the first sealing groove is parallel to the axis of the joint body, and the inner wall surface of the first sealing groove is in the shape of an inclined surface with a larger bottom and a smaller top, so that the inner wall surface of the first sealing groove and the axis of the joint body form an angle b, b is 4° to 14°; the upper end surface of the first sealing protrusion is set as an inclined surface, and the inclined surface forms an angle c with the axis of the joint body, c is 60° to 86°; the angle c is set to be less than or equal to the supplementary angle of angle b;

[0011] A second sealing protrusion and a second sealing groove are provided on a side of the inner core away from the pipe; during installation, the first sealing groove and the second sealing protrusion abut against each other, and the first sealing protrusion and the second sealing groove abut against each other.

[0012] Preferably, the inner wall surface of the second sealing protrusion is in the shape of an inclined plane with a smaller upper portion and a larger lower portion, and the inclined plane forms an angle d with the axis of the inner core, and the angle d is the same as the angle b;

[0013] The inner wall surface of the second sealing groove is in the shape of an inclined surface that is larger at the top and smaller at the bottom, and the inclined surface forms an angle e with the axis of the inner core, and the angle e is the same as the angle c.

[0014] Preferably, one end of the inner core connected to the pipe is provided with a gradually widening portion and a gradually narrowing portion, and an angle between the gradually widening portion and the gradually narrowing portion is 145° to 160°.

[0015] Preferably, the joint cap is provided with a through hole whose inner diameter is larger than the diameter of the pipe and smaller than the minimum outer diameter of the inner core. When the joint cap is threadedly connected to the joint body, pressure is applied to the inner core through the joint cap to achieve sealing.

[0016] The beneficial effects of the utility model are:

[0017] When a bead-type connector of the present invention is used, the second sealing groove of the inner core serves as the extrusion point, and the first sealing protrusion serves as the extruded point. By setting the angle c to be less than or equal to the supplementary angle of angle b, the downward pressure is increased while the pressure between the outer wall of the first sealing groove and the outer wall of the second sealing protrusion is also increased, thereby achieving an anti-slip effect. Furthermore, the above-mentioned setting can also make it possible to use the pipeline pressure and the first sealing protrusion to radially squeeze the second sealing protrusion when the pipeline is under pressure, forming an additional sealing point, further improving the sealing effect, and ensuring that the inner core will not fall off or other undesirable phenomena once it is inserted into the connector body, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic exploded cutaway diagram of a middle joint connection structure according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of a connector body in one embodiment of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of part A;

[0022] Figure 4 It is a cross-sectional schematic diagram of the inner core in one embodiment of the present invention.

[0023] Figure 5 for Figure 4 Enlarged view of part B.

[0024] Description of reference numerals:

[0025] 1. Connector body; 11. Central through hole; 12. First sealing groove; 13. First sealing protrusion; 14. External thread; 2. Connector cap; 21. Pressing through hole; 22. Anti-slip ridges; 3. Inner core; 31. Second sealing groove; 32. Second sealing protrusion; 33. Tapered portion; 34. Widened portion; 4. Pipe. DETAILED DESCRIPTION

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. In order to better illustrate this embodiment, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual size of the product.

[0027] For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present utility model will be further described below in conjunction with the drawings and embodiments.

[0028] As attached Figure 1-5 The bead-type joint shown includes an inner core 3 , a joint cap 2 and a joint body 1 .

[0029] The inner core 3 is fixedly connected to one end of the pipe 4 by hot melting; the material of the pipe 4 is PFA.

[0030] The connector body 1 has a sealing connection portion, which includes a central through-hole 11 extending axially through the connector body 1, a first sealing groove 12 and a first sealing protrusion 13 arranged radially, and external threads 14 on its outer wall. The central through-hole 11 receives the inner core 3 located at the end of the pipe 4, and the external threads 14 are threadedly connected to the connector cap 2. The upper end surface of the sealing connection portion is inclined, narrowing at the top and widening at the bottom. This inclined surface forms an angle a with the axis of the sealing connection portion, ranging from 12° to 16°. This angle is designed to effectively apply radial compressive force to the maximum effect.

[0031] The outer wall of the first sealing groove 12 is parallel to the axis of the connector body 1, and the inner wall of the first sealing groove 12 is in the shape of an inclined plane with a larger bottom and a smaller top, so that the inner wall of the first sealing groove 12 has an angle b with the axis of the connector body 1, and b is 4° to 12°; the upper end face of the first sealing protrusion 13 is set as an inclined plane, and the inclined plane has an angle c with the axis of the connector body 1, and c is 60° to 86°; the angle of angle c is set to be less than or equal to the supplementary angle of angle b. The inner core 3 is the end that is actively inserted, so the angle of angle c is set to be less than or equal to the supplementary angle of angle b. This design can effectively ensure the implementation of the plug-in operation and ensure that the extrusion seal here is optimal. At the same time, it can also use the pressure of the outward collision of the pipe 4 and the first sealing protrusion 13 to radially squeeze the second sealing protrusion 32, thereby increasing the sealing points and further improving the sealing effect.

[0032] A second sealing protrusion 32 and a second sealing groove 31 are provided on the side of the inner core 3 away from the pipe 4 ; during installation, the first sealing groove 12 abuts against the second sealing protrusion 32 , and the first sealing protrusion 13 abuts against the second sealing groove 31 .

[0033] In some embodiments, the inner wall surface of the second sealing protrusion 32 is in the shape of an inclined surface with a smaller upper portion and a larger lower portion, and the inclined surface forms an angle d with the axis of the inner core 3 , and the angle d is the same as the angle b.

[0034] The inner wall surface of the second sealing groove 31 is in the shape of an inclined surface that is larger at the top and smaller at the bottom, and the inclined surface forms an angle e with the axis of the inner core 3 , and the angle e is the same as the angle c.

[0035] In some embodiments, a gradually widening portion 34 and a gradually narrowing portion 33 are provided at one end of the inner core 3 connected to the pipe 4, with an angle of 145° to 160° between the gradually widening portion 34 and the gradually narrowing portion 33. The gradually widening portion 34 and the gradually narrowing portion 33 can better connect to the pipe 4 and ensure a good sealing effect.

[0036] In some embodiments, the joint cap 2 is provided with a compression hole 21 whose inner diameter is larger than the diameter of the pipe 4 and smaller than the minimum outer diameter of the inner core 3. When the joint cap 2 is threadedly connected to the joint body 1, pressure is applied to the inner core 3 through the joint cap 2 to achieve sealing.

[0037] In some embodiments, the outer wall of the joint cap 2 is provided with anti-skid ridges 22. The anti-skid ridges 22 improve the convenience for the operator when removing or installing the joint cap 2.

[0038] The process flow and working principle of the utility model are as follows: the pipes 4 on both sides are sealed and connected at both ends of the joint body 1 through the inner core 3 and the joint cap 2, wherein the first sealing protrusion 13 of the joint body 1 abuts against the second sealing groove 31 of the inner core 3, and the first sealing groove 12 of the joint body 1 abuts against the second sealing protrusion 32 of the inner core 3, thereby forming three sealing surfaces between the joint body 1 and the inner core 3, improving the sealing between the inner core 3 and the joint body 1; the inner wall of the joint cap 2 cooperates with the gradually widening part and the gradually narrowing part of the inner core 3 to press the pipe fitting to achieve sealed contact, thereby improving the sealing and stability between the joint body 1, the joint cap 2 and the inner core 3, and ensuring that high-purity chemicals, high-purity water and highly corrosive chemicals will not leak during transportation.

[0039] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A bead-type connector, characterized in that: It includes an inner core, a joint cap and a joint body; The inner core is fixedly connected to one end of the pipe by hot melting; The joint body has a sealing connection portion, which includes a central through hole extending axially through the joint body, a first sealing groove and a first sealing protrusion arranged axially, and an external thread provided on its outer wall; the central through hole is used to receive the inner core located at the end face of the pipe, and the external thread is used to threadably connect the joint cap; The upper end surface of the sealing connection portion is in the shape of an inclined plane with a smaller upper portion and a larger lower portion, and the inclined plane forms an angle a with the axis of the sealing connection portion, and the angle a is 12° to 16°; The outer wall surface of the first sealing groove is parallel to the axis of the joint body, and the inner wall surface of the first sealing groove is in the shape of an inclined surface with a larger bottom and a smaller top, so that the inner wall surface of the first sealing groove and the axis of the joint body form an angle b, b is 4° to 14°; the upper end surface of the first sealing protrusion is set as an inclined surface, and the inclined surface forms an angle c with the axis of the joint body, c is 60° to 86°; the angle c is set to be less than or equal to the supplementary angle of angle b; A second sealing protrusion and a second sealing groove are provided on a side of the inner core away from the pipe; during installation, the first sealing groove and the second sealing protrusion abut against each other, and the first sealing protrusion and the second sealing groove abut against each other.

2. A bead-type joint according to claim 1, characterized in that: The inner wall surface of the second sealing protrusion is in the shape of an inclined surface with a smaller upper portion and a larger lower portion, and the inclined surface forms an angle d with the axis of the inner core, and the angle d is the same as the angle b; The inner wall surface of the second sealing groove is in the shape of an inclined surface that is larger at the top and smaller at the bottom, and the inclined surface forms an angle e with the axis of the inner core, and the angle e is the same as the angle c.

3. A bead-type joint according to claim 1, characterized in that: One end of the inner core connected to the pipe is provided with a gradually widening portion and a gradually narrowing portion, and an angle between the gradually widening portion and the gradually narrowing portion is 145° to 160°.

4. A bead-type joint according to claim 1, characterized in that: The joint cap is provided with a compression through hole whose inner diameter is larger than the outer diameter of the pipe and smaller than the minimum diameter of the inner core. When the joint cap is threadedly connected to the joint body, pressure is applied to the inner core through the joint cap to achieve sealing.

5. A bead-type joint according to claim 1, characterized in that: The outer wall of the joint cap is provided with anti-slip convex patterns.

Images