Pipe joint
By setting an annular barrier edge and step groove on the insert, rubber is prevented from flowing to the internal thread, and using reinforcement blocks and annular structure to enhance the connection strength, the problem of low production efficiency of pipe joints is solved, and more efficient production and stable connections are achieved .
Patent Information
- Application Number
- CN202420160160.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-22
AI Technical Summary
During the injection molding process of existing pipe joints, the molten rubber easily flows to the internal thread, causing the internal thread to lose its connection effect, which requires later cleaning, reducing production efficiency.
The annular barrier edge and step groove are provided on the insert. The molten rubber flows into the step groove. The annular barrier edge blocks the rubber flows to the internal thread to prevent the internal thread from being blocked, and the insert is improved through reinforcement blocks, reinforcement rings and reinforcement plates Connection strength between the part and the injection molding layer.
Improve the production efficiency of pipe joints, avoid internal thread clogging, and enhance the connection strength and stability of the insert and the injection molding layer.
Smart Images
Figure CN222186195U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipe joints and relates to a pipe joint. Background Art
[0002] A pipe joint is a part that connects pipes in a hydraulic system or installs pipes on hydraulic components. It is a general term for connectors that can be installed and removed in a fluid passage.
[0003] The pipe joint generally includes an insert and an injection layer. The insert can be made of copper or aluminum. The injection layer is formed by injecting hot melt rubber onto the outer circumference of the insert and then cooling it. In order to improve the firmness of the connection between the insert and the injection layer, the injection layer will be partially embedded into the inner side of one end of the insert. The injection layer covers one end of the insert, thereby improving the firmness of the connection between the insert and the injection layer.
[0004] However, the injection molding layer is made by injecting molten rubber material. When the rubber is injected, it has a certain speed and impact force. There is an internal thread on the inner wall of the insert. During the processing of the injection molding layer, there is a problem that the molten rubber flows to the internal thread. After the molten rubber solidifies, the internal thread loses its connection effect. It is necessary to clean this part of the rubber later, which reduces the production efficiency of the pipe joint. Summary of the invention
[0005] The utility model aims to solve the above problems existing in the prior art and proposes a pipe joint, and the technical problem solved is how to improve the production efficiency of the pipe joint.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a pipe joint, comprising an insert and an injection molding layer, the injection molding layer is sleeved and fixedly connected to the outside of the insert, the insert has an internal thread section, and is characterized in that the insert also has an annular retaining edge protruding inwardly along the radial direction of the insert, an annular step groove is formed between the annular retaining edge and the tail end of the insert, the internal thread section and the step groove are located on both sides of the annular retaining edge, and the injection molding layer is partially embedded in the step groove.
[0007] The annular retaining edge separates the internal thread section and the step groove. During injection molding, the molten rubber flows into the step groove. Due to the blocking effect of the annular retaining edge, the molten rubber cannot flow into the internal thread section, that is, the internal thread section will not be blocked and does not need to be cleaned, thereby improving the production efficiency of the pipe joint.
[0008] In the above-mentioned pipe joint, the internal thread section and the annular retaining edge are arranged adjacent to each other, so as to reasonably utilize the space and make the internal thread section and the annular retaining edge compact.
[0009] In the above-mentioned pipe joint, the injection molding layer includes a main body and an extension section, the main body is sleeved on the insert, the extension section extends along the axial direction of the insert to the outside of the tail end of the insert, and the inner end of the extension section is embedded in the step groove. This structure can make the injection molding layer better connected to the insert, and make the pipe joint better connected to other pipe fittings.
[0010] In the above-mentioned pipe joint, the outer diameter of the extension section is smaller than the outer diameter of the main body, and the inner diameter of the extension section is larger than the inner diameter of the annular retaining edge. This structure enables the pipe joint to be better connected with other pipe fittings.
[0011] In the above-mentioned pipe joint, the height of the annular stop along the radial direction of the insert is the same as the depth of the step groove along the axial direction of the insert.
[0012] In the above-mentioned pipe joint, the tail end of the insert has a plurality of reinforcement blocks protruding outward along the axial direction of the insert, and the reinforcement blocks are embedded in the injection molding layer. The provision of the reinforcement blocks can improve the circumferential connection strength between the insert and the injection molding layer and improve the stability of the pipe joint.
[0013] In the above-mentioned pipe joint, the outer circumferential side wall of the insert has a plurality of first reinforcement rings protruding outward in an annular shape, and a reinforcement groove recessed inward is provided between two adjacent first reinforcement rings. The inner side wall of the injection molding layer has a plurality of second reinforcement rings protruding inward in an annular shape, and the second reinforcement rings are embedded in the reinforcement groove. This structure can improve the axial connection strength between the insert and the injection molding layer and improve the stability of the pipe joint.
[0014] In the above-mentioned pipe joint, a plurality of reinforcement sheets protruding outward are arranged at intervals on the circumferential outer side wall of at least one of the first reinforcement rings, and the reinforcement sheets are embedded in the injection molding layer. The arrangement of the reinforcement sheets can improve the connection strength between the insert and the injection molding layer in the circumferential direction and improve the stability of the pipe joint.
[0015] Compared with the prior art, the pipe joint provided by the utility model has the following advantages:
[0016] 1. The pipe joint is provided with an annular retaining edge on the inner side wall of the insert so that the melted rubber cannot flow to the internal thread section, that is, the internal thread section will not be blocked and does not need to be cleaned, thereby improving the production efficiency of the pipe joint.
[0017] 2. The pipe joint improves the axial and circumferential connection strength between the insert and the injection layer and improves the stability of the pipe joint by providing the first reinforcement ring, the second reinforcement ring, the reinforcement block and the reinforcement sheet. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1It is a schematic diagram of the overall structure of the pipe joint.
[0019] Figure 2 This pipe joint Figure 1 Magnified image of area A.
[0020] Figure 3 It is a schematic diagram of the overall structure of the pipe joint insert.
[0021] In the figure, 1, insert; 2, injection molding layer; 21, main body; 22, extension section; 3, internal thread section; 4, annular retaining edge; 5, step groove; 6, reinforcement block; 7, first reinforcement ring; 8, reinforcement groove; 9, second reinforcement ring; 10, reinforcement sheet. DETAILED DESCRIPTION
[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0023] like Figure 1 As shown, the pipe joint includes an insert 1 and an injection-molded layer 2 , and the injection-molded layer 2 is sleeved and fixedly connected to the insert 1 .
[0024] like Figure 2 , Figure 3 As shown, the insert 1 has an internal thread section 3 and an annular retaining edge 4 protruding inwardly in the radial direction of the insert 1. The internal thread section 3 and the annular retaining edge 4 are arranged adjacent to each other. An annular step groove 5 is formed between the annular retaining edge 4 and the rear end of the insert 1. The internal thread section 3 and the step groove 5 are located on both sides of the annular retaining edge 4, and the injection layer 2 is partially embedded in the step groove 5. The height of the annular retaining edge 4 in the radial direction of the insert 1 is the same as the depth of the step groove 5 in the axial direction of the insert 1.
[0025] The injection molding layer 2 includes a main body 21 and an extension section 22. The main body 21 is sleeved on the insert 1. The extension section 22 extends along the axial direction of the insert 1 to the outside of the tail end of the insert 1. The inner end of the extension section 22 is embedded in the step groove 5. The outer diameter of the extension section 22 is smaller than the outer diameter of the main body 21, and the inner diameter of the extension section 22 is larger than the inner diameter of the annular retaining edge 4.
[0026] In this embodiment, the rear end of the insert 1 has six reinforcing blocks 6 protruding outward along the axial direction of the insert 1, and the reinforcing blocks 6 are embedded in the injection molding layer 2. In actual production, the number of the reinforcing blocks 6 can be four or eight.
[0027] In this embodiment, the insert 1 has four first reinforcement rings 7 protruding outward in an annular shape on the circumferential outer wall, and a reinforcement groove 8 concave inward is provided between two adjacent first reinforcement rings 7. The injection molded layer 2 has three second reinforcement rings 9 protruding inward in an annular shape on the inner wall, and the second reinforcement rings 9 are embedded in the reinforcement grooves 8. Fifteen reinforcement sheets 10 protruding outward are arranged at intervals on the circumferential outer walls of the three first reinforcement rings 7, and the reinforcement sheets 10 are embedded in the injection molded layer 2. In actual production, the number of first reinforcement rings 7 can be three or six, the number of reinforcement grooves 8 and second reinforcement rings 9 can be two or five, and the number of reinforcement sheets 10 can be ten or twenty.
[0028] During processing, the insert 1 is first processed, and then the insert 1 is placed in the mold, and the molten rubber is injected. Part of the rubber flows into the step groove 5 and is blocked by the annular baffle 4. After the rubber is cooled, an injection layer 2 is formed, so that the insert 1 and the injection layer 2 are staggered with each other, so that the insert 1 and the injection layer 2 are axially and circumferentially positioned.
[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
[0030] Although this article uses more terms such as insert 1, injection molding layer 2, main body 21, extension section 22, internal thread section 3, annular retaining edge 4, step groove 5, reinforcement block 6, first reinforcement ring 7, reinforcement groove 8, second reinforcement ring 9, reinforcement sheet 10, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
Claims
1. A pipe joint, comprising an insert (1) and an injection-molded layer (2), wherein the injection-molded layer (2) is sleeved and fixedly connected to the outside of the insert (1), and the insert (1) has an internal thread section (3), characterized in that: The insert (1) also has an annular retaining edge (4) which protrudes inwardly along the radial direction of the insert (1), and an annular step groove (5) is formed between the annular retaining edge (4) and the rear end of the insert (1), the internal thread section (3) and the step groove (5) are located on both sides of the annular retaining edge (4), and the injection molding layer (2) is partially embedded in the step groove (5).
2. A pipe joint according to claim 1, characterized in that: The internal thread section (3) is arranged adjacent to the annular retaining edge (4).
3. A pipe joint according to claim 1, characterized in that: The injection molding layer (2) comprises a main body (21) and an extension section (22), wherein the main body (21) is sleeved on the insert (1), and the extension section (22) extends along the axial direction of the insert (1) to the outside of the rear end of the insert (1), and the inner end of the extension section (22) is embedded in the step groove (5).
4. A pipe joint according to claim 3, characterized in that: The outer diameter of the extension section (22) is smaller than the outer diameter of the main body (21), and the inner diameter of the extension section (22) is larger than the inner diameter of the annular retaining edge (4).
5. A pipe joint according to claim 1 or 2 or 3 or 4, characterized in that: The height of the annular baffle (4) along the radial direction of the insert (1) is the same as the depth of the step groove (5) along the axial direction of the insert (1).
6. A pipe joint according to claim 1 or 2 or 3 or 4, characterized in that: The rear end of the insert (1) is provided with a plurality of reinforcing blocks (6) which are arranged to protrude outwardly along the axial direction of the insert (1), and the reinforcing blocks (6) are embedded in the injection molding layer (2).
7. A pipe joint according to claim 1 or 2 or 3 or 4, characterized in that: The insert (1) has a plurality of first reinforcement rings (7) on its circumferential outer side wall which are arranged to protrude outward in an annular shape, and a reinforcement groove (8) which is arranged to be recessed inward is provided between two adjacent first reinforcement rings (7). The injection molding layer (2) has a plurality of second reinforcement rings (9) on its inner side wall which are arranged to protrude inward in an annular shape, and the second reinforcement rings (9) are embedded in the reinforcement grooves (8).
8. A pipe joint according to claim 7, characterized in that: A plurality of reinforcement sheets (10) protruding outwards are arranged at intervals on the circumferential outer side wall of at least one of the first reinforcement rings (7), and the reinforcement sheets (10) are embedded in the injection molding layer (2).