A coreless machining core and variable diameter pipeline

Abstract

The utility model relates to the field of pipe fitting, more specifically, a kind of core and reducing pipeline of exempting from lathe processing, including core main body and fixed pipe, core main body includes spigot portion, socket portion and reducing portion, the inner diameter of spigot portion is greater than the inner diameter of socket portion, spigot portion and socket portion are connected by reducing portion, one end of fixed pipe is abutted with the end of spigot portion close to reducing portion, and the outer diameter of fixed pipe is same with the outer diameter of spigot portion.Compared with the existing core, the core adopts the structure of split type, fixed pipe belongs to regular shape pipe fitting, without being integrally injection molded with core main body, the surface quality of fixed pipe is better and relatively smooth, so lathe processing is not needed, the surface of fixed pipe can maintain good fixing effect, reduce production cost and improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings, and more specifically, to a machining-free manifold and reducing pipe. Background Technology

[0002] A reducer is a type of reducing connector used in piping systems. Its main function is to establish a stable connection between two pipes of different diameters, ensuring a smooth fluid transition. The outer diameter of the spigot of this type of fitting typically matches the outer diameter of the main pipe, while the inner diameter of the socket matches the outer diameter of the pipe to be connected. Effective pipe diameter conversion is achieved through installation and assembly. Due to its special structure and significant dimensional transition, traditional reducers are usually manufactured using a one-piece injection molding process. However, due to the irregular geometry of the reducer, uneven shrinkage often occurs on its outer wall during the injection molding cooling process, accompanied by obvious weld lines, resulting in an uneven surface. This surface defect not only affects the appearance quality but also weakens the bond strength between the reducer and the pipe, thus affecting the sealing performance and long-term reliability of the entire pipe joint.

[0003] To improve the quality of the outer wall, some manufacturers reserve a certain machining allowance for the outer diameter during the product design stage for large-size core fillers. After injection molding, the outer surface is then machined to achieve the required flatness and dimensional accuracy. However, while this post-processing method can improve the product's appearance and fit, it also significantly increases raw material consumption, processing steps, and time. Furthermore, it requires companies to equip themselves with specialized turning equipment, leading to increased overall manufacturing costs, longer production cycles, and reduced production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the problem that machining is unavoidable when producing patch cores in the existing technology, and to provide a patch core that does not require machining, thereby reducing production costs and improving production efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A machining-free filler core is provided, comprising a filler core body and a fixing tube. The filler core body includes a spigot portion, a socket portion, and a reducing portion. The inner diameter of the spigot portion is larger than the inner diameter of the socket portion. The spigot portion and the socket portion are connected through the reducing portion. One end of the fixing tube abuts against the end of the spigot portion near the reducing portion. The outer diameter of the fixing tube is the same as the outer diameter of the spigot portion.

[0006] This utility model discloses a machining-free manifold, which consists of two detachable parts. When connecting reducing pipes, first remove the main body of the manifold and insert the spigot end into one end of the first outer connector. Then, remove the fixing pipe and insert it into one end of the first outer connector until one end of the fixing pipe abuts against the spigot end. The fixing pipe strengthens the fixing effect of the main body of the manifold. Finally, insert the second outer connector into the socket and connect it, thus completing the connection of the reducing pipe. Compared to existing manifolds, this manifold adopts a split structure. The fixing pipe is a regularly shaped pipe fitting and does not need to be integrally injection molded with the main body of the manifold. The outer surface of the fixing pipe is of better quality and smoother, therefore no machining is required. The surface of the fixing pipe can maintain a good fixing effect, reducing production costs and improving production efficiency.

[0007] Furthermore, it also includes a seal, wherein the side wall of the socket portion is provided with a mounting groove, and the seal is installed in the mounting groove. The seal can improve the sealing performance of the pipe connection.

[0008] Furthermore, the mounting groove is a trapezoidal groove, with the inner diameter of the end of the mounting groove near the reducing portion being smaller than the inner diameter of the end of the mounting groove away from the reducing portion. Before connecting the pipe, the sealing ring is first installed in the mounting groove, and then the core filler body is pushed into the first outer pipe fitting. As the inner diameter of the mounting groove gradually decreases, the mounting groove will compress the sealing ring, resulting in a better sealing effect. At the same time, the compression of the sealing ring also improves the fixing effect of the core filler body.

[0009] Furthermore, the end of the fixed tube furthest from the spigot and the end of the socket furthest from the reducing portion are located on the same radial plane. This makes the entire end face neater and more aesthetically pleasing.

[0010] Furthermore, a first limiting portion is provided at one end of the socket portion near the reducing portion, and the inner diameter of the first limiting portion is smaller than the inner diameter of the insertion portion. The first limiting portion can abut against the end of the second outer pipe fitting to limit the installation position of the second outer pipe fitting.

[0011] Furthermore, the inner wall of the variable diameter section is a tapered surface.

[0012] A reducing pipe includes a large-diameter fitting, a small-diameter fitting, and a machining-free mandrel. The spigot is inserted into the inner wall of the large-diameter fitting, and the fixing pipe is fixedly connected to the inner wall of the large-diameter fitting. The small-diameter fitting is inserted into the inner wall of the socket. When connecting the reducing pipe, first remove the mandrel body, insert the spigot into one end of the large-diameter fitting, then remove the fixing pipe and insert it into one end of the large-diameter fitting until one end of the fixing pipe abuts against the spigot. The fixing pipe strengthens the fixing effect of the mandrel body. Finally, insert the small-diameter fitting into the socket and connect it, thus completing the connection of the reducing pipe.

[0013] Furthermore, the inner wall of the large-diameter pipe fitting is provided with a second limiting part, which abuts against the end of the spigot portion. The second limiting part abuts against the end of the spigot portion to limit the installation position of the spigot portion, and the core body is firmly fixed under the clamping of the fixing pipe and the second limiting part.

[0014] Furthermore, the fixing pipe and the large-diameter pipe fitting are bonded together using an adhesive. Bonding with an adhesive provides better fixation and sealing.

[0015] Furthermore, the end of the fixed tube furthest from the socket is located on the same radial plane as the end of the large-diameter pipe fitting. This makes the entire end face neater and more aesthetically pleasing.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. Compared with existing cores, this core adopts a split structure. The fixing tube is a regular-shaped fitting and does not need to be integrally injection molded with the core body. The outer surface of the fixing tube is of good quality and smooth, so no machining is required. The surface of the fixing tube can maintain a good fixing effect, reducing production costs and improving production efficiency. 2. The mounting groove is a trapezoidal groove. By pushing the core body, the mounting groove will squeeze the sealing ring, improving the sealing effect. At the same time, the compression of the sealing ring can also improve the fixing effect of the core body. 3. The double seal, achieved through a sealing ring and adhesive bonding, ensures high reliability. Attached Figure Description

[0017] Figure 1 A schematic diagram of a machining-free filler core; Figure 2 This is a schematic diagram of the main body of the core repair module; Figure 3 This is a schematic diagram of a variable diameter pipe.

[0018] In the attached diagram: 100, main body of the core; 110, spigot; 111, mounting groove; 120, socket; 121, first limiting part; 130, reducing part; 200, fixed pipe; 300, sealing element; 400, large-diameter pipe fitting; 410, second limiting part; 500, small-diameter pipe fitting. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," and "fitting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In the description of this specification, references to terms such as "embodiment" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0023] Example 1 This embodiment is a first embodiment of a machining-free core repair method, such as... Figure 1 As shown, it includes a core-filling body 100, a fixing tube 200, and a sealing element 300, such as Figure 2 As shown, the core body 100 includes a socket portion 110, a socket portion 120, and a reducing portion 130. The inner diameter of the socket portion 110 is larger than the inner diameter of the socket portion 120. The socket portion 110 and the socket portion 120 are connected through the reducing portion 130. The inner wall of the reducing portion 130 is a tapered surface. One end of the fixing tube 200 abuts against the end of the socket portion 110 near the reducing portion 130. The outer diameter of the fixing tube 200 is the same as the outer diameter of the socket portion 110. The side wall of the socket portion 110 is provided with an installation groove 111. The sealing element 300 is installed in the installation groove 111. The installation groove 111 is a trapezoidal groove. The inner diameter of the trapezoidal groove near the reducing portion 130 is smaller than the inner diameter of the trapezoidal groove away from the reducing portion 130.

[0024] The working principle of this embodiment is as follows: This utility model relates to a machining-free patch core, which adopts an innovative split structure design, mainly composed of two detachable parts: a patch core body 100 and a fixing tube 200. Before connecting the pipes, the sealing ring is first pre-installed in the mounting groove 111 of the patch core body 100. When making a diameter-reducing connection, the patch core body 100 is first taken out, and its spigot 110 is inserted into one end of the first external pipe fitting, such as a large-diameter pipe fitting. Since the inner diameter of the mounting groove 111 is designed to gradually converge, when the patch core body is inserted, the groove wall will gradually compress the sealing ring, thereby achieving a reliable sealing effect. Subsequently, the fixing tube 200 is taken out and inserted into the first external pipe fitting in the same direction until one end of the fixing tube 200 is fully abutting the spigot 110 of the patch core body 100. The fixed pipe 200 can provide effective support to the core body from the inside, significantly enhancing its positioning stability and load-bearing capacity in the outer pipe fitting. Finally, the second outer pipe fitting, such as a small-diameter pipe fitting, is inserted into the socket 120 of the core body 100 and fixed, thus completing the entire variable diameter pipe connection assembly.

[0025] Compared to existing technologies, the core advantage of this invention lies in its modular structure. The fixing tube 200 is a regularly shaped tubular component, eliminating the need for integral injection molding with the complex core body 100, and can be manufactured separately. Due to its simple shape, high molding quality, and smooth, flat outer surface, it meets assembly requirements without subsequent machining. This design effectively reduces production costs and improves production efficiency while ensuring connection strength and sealing performance, making it suitable for large-scale applications.

[0026] Example 2 This embodiment is a second embodiment of a machining-free patch core. This embodiment is similar to the first embodiment, except that, as Figure 2 As shown, a first limiting part 121 is provided at the end of the socket portion 120 near the reducing portion 130, and the inner diameter of the first limiting part 121 is smaller than the inner diameter of the spigot portion 110. The end of the fixing tube 200 away from the spigot portion 110 and the end of the socket portion 120 away from the reducing portion 130 are located on the same radial plane. Here, the radial plane refers to the plane perpendicular to the axis of the core body 100.

[0027] The working principle of this embodiment is as follows: The first limiting part can abut against the end of the second outer pipe fitting to limit the installation position of the second outer pipe fitting. In this case, the second outer pipe fitting is inserted into the inner wall of the socket.

[0028] In addition, the second outer pipe fitting can also be inserted into the outer wall of the socket 120. In this case, the first limiting part 121 needs to be provided on the outer wall of the socket 120.

[0029] The remaining working principles of this embodiment are the same as those of Embodiment 1.

[0030] Example 3 This embodiment is a first embodiment of a variable diameter pipe, such as... Figure 3 As shown, it includes a large-diameter pipe fitting 400, a small-diameter pipe fitting 500, a core repair body 100, a fixing pipe 200, and a sealing element 300.

[0031] The core body 100 includes a spigot portion 110, a socket portion 120, and a reducing portion 130. The inner diameter of the spigot portion 110 is larger than the inner diameter of the socket portion 120. The spigot portion 110 and the socket portion 120 are connected by the reducing portion 130. The inner wall surface of the reducing portion 130 is tapered. One end of the fixing tube 200 abuts against the end of the spigot portion 110 near the reducing portion 130. The outer diameter of the fixing tube 200 is the same as the outer diameter of the spigot portion 110. The side wall of the spigot portion 110 is provided with a mounting groove 111. The sealing element 300 is installed in the mounting groove 111. The mounting groove 111 is a trapezoidal groove. The inner diameter of the trapezoidal groove near the reducing portion 130 is smaller than the inner diameter of the groove away from the reducing portion 130. The inner diameter of one end of the reducing portion 130 is such that the spigot portion 110 is inserted into the inner wall of the large-diameter pipe fitting 400, the fixed pipe 200 is bonded to the inner wall of the large-diameter pipe fitting 400 by an adhesive, the small-diameter pipe fitting 500 is inserted into the inner wall of the socket portion 120, the end of the socket portion 120 near the reducing portion 130 is provided with a first limiting portion 121, the inner wall of the large-diameter pipe fitting 400 is provided with a second limiting portion 410, the second limiting portion 410 abuts against the end of the spigot portion 110, the end of the fixed pipe 200 away from the spigot portion 110, the end of the large-diameter pipe fitting 400 and the end of the socket portion 120 away from the reducing portion 130 are all located on the same radial plane.

[0032] When connecting reducing pipes, first remove the core body 100, align its spigot 110 with the port of the large-diameter pipe fitting 400, and insert it smoothly. Next, take the fixing tube 200, insert it into the port of the large-diameter pipe fitting 400 in the same direction, and push it forward until one end of the fixing tube 200 is fully abutted against the spigot 110 of the core body 100. The fixing tube 200 can provide effective support for the core body 100 from the inside, significantly enhancing its positioning stability and resistance to deformation within the large-diameter pipe fitting, thereby improving the overall reliability of the connection.

[0033] After completing the above steps, insert the small-diameter pipe fitting 500 into the socket 120 at the other end of the mandrel body 100, and ensure that it is installed in place. Through this process, a reliable diameter-reducing connection between the large-diameter pipe fitting 400 and the small-diameter pipe fitting 500 can be achieved with the help of this mandrel assembly.

[0034] The remaining working principles of this embodiment are the same as those of Embodiment 2.

[0035] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make various variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A machining-free filler core, characterized in that, The device includes a core body (100) and a fixing tube (200). The core body (100) includes a socket (110), a socket (120), and a reducing part (130). The inner diameter of the socket (110) is larger than the inner diameter of the socket (120). The socket (110) and the socket (120) are connected through the reducing part (130). One end of the fixing tube (200) abuts against the end of the socket (110) near the reducing part (130). The outer diameter of the fixing tube (200) is the same as the outer diameter of the socket (110).

2. The machining-free core repair according to claim 1, characterized in that, It also includes a sealing element (300), and the side wall of the socket portion (110) is provided with a mounting groove (111), and the sealing element (300) is installed in the mounting groove (111).

3. The machining-free core repair according to claim 2, characterized in that, The mounting groove (111) is a trapezoidal groove, and the inner diameter of the mounting groove (111) near the variable diameter part (130) is smaller than the inner diameter of the mounting groove (111) away from the variable diameter part (130).

4. The machining-free core according to claim 1, characterized in that, The end of the fixed tube (200) away from the socket (110) and the end of the socket (120) away from the variable diameter part (130) are located on the same radial plane.

5. A machining-free patch core according to claim 1, characterized in that, The socket portion (120) is provided with a first limiting portion (121) at one end near the variable diameter portion (130), and the inner diameter of the first limiting portion (121) is smaller than the inner diameter of the insertion portion (110).

6. A machining-free patch core according to claim 1, characterized in that, The inner wall of the variable diameter section (130) is tapered.

7. A reducing pipe, characterized in that, The device includes a large-diameter pipe fitting (400), a small-diameter pipe fitting (500), and a machining-free filler core as described in any one of claims 1-6. The spigot (110) is inserted into the inner wall of the large-diameter pipe fitting (400), the fixing pipe (200) is fixedly connected to the inner wall of the large-diameter pipe fitting (400), and the small-diameter pipe fitting (500) is inserted into the inner wall of the socket (120).

8. A variable diameter pipe according to claim 7, characterized in that, The inner wall of the large-diameter pipe fitting (400) is provided with a second limiting part (410), which abuts against the end of the socket part (110).

9. A reducing pipe according to claim 7, characterized in that, The fixed pipe (200) and the large-diameter pipe fitting (400) are bonded together by an adhesive.

10. A variable diameter pipe according to claim 7, characterized in that, The end of the fixed tube (200) away from the socket (110) is located on the same radial plane as the end of the large-diameter pipe fitting (400).

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