Locking type reducing disc

Abstract

The utility model relates to a pipe connecting technology, which is firm, safe and reliable, not easy to fall off, and does not need additional auxiliary device, and overcomes the shortcomings of the original market technology, and comprises a socket and spigot type reducing disc body, a positioning / limiting pin, a U-shaped wire, a nut and a sealing rubber ring, the bottom end of the socket and spigot type reducing disc body is connected to the upper end of the U-shaped wire and is fixed by the nut, the positioning / limiting pin is inserted into the perforation of the socket and spigot type reducing disc body, and the bottom of the socket and spigot type reducing disc body is sealed by the sealing rubber ring.

Description

Technical Field

[0001] This utility model relates to pipe connection technology, especially to socket locking reducing discs. Background Technology

[0002] Socket-type connections refer to a method of connecting two pipes by inserting one pipe into the connector of another and then welding or clamping them together. Socket-type connections are typically suitable for low-pressure, low-temperature, or small-diameter piping systems. However, due to the need for special welding or clamping processes, they are more expensive to manufacture and more difficult to disassemble. Although socket-type reducing discs are increasingly used in piping systems due to their ease of installation and good sealing performance, analysis of existing patented technologies (such as CN103671234A, CN205118975U, CN108757567A, etc.) reveals several technical defects and limitations in structural design, material adaptability, sealing reliability, and operational adaptability. The main drawbacks are summarized below: The sealing structure is simple, resulting in insufficient long-term sealing reliability. Most existing patents use a single O-ring or simple rubber seal for sealing, lacking multi-stage redundant sealing design. Under high pressure, high temperature, or frequent pressure fluctuation conditions, the seal is prone to permanent compression deformation, aging, or extrusion, leading to leakage.

[0003] Technical limitations: The impact of dynamic loads (such as vibration and thermal expansion and contraction) on sealing performance is not fully considered, and there is a lack of self-compensating or pressure-enhancing sealing mechanisms. Consequences: In high-risk scenarios such as petrochemical and chemical industries, there is a potential risk of leakage, affecting the safe operation of the system.

[0004] The socket connection has weak tensile and shear resistance. Problem description: The socket structure relies on friction and the engagement of the sealing ring to achieve the connection. It lacks a mechanical locking mechanism (such as clamps, threads or pins), and is prone to loosening or falling out under axial tensile force or lateral shear force.

[0005] Technical limitations: Existing designs mostly rely on external clamps for auxiliary fixing, but the lack of integrated design between the clamps and the reducing disc body results in poor overall integrity, and installation reliability depends on construction quality. Consequences: Connection failures are prone to occur in vibrating pipeline systems (such as pump outlets and compressor pipelines).

[0006] 3. Difficult installation and alignment, relying on manual operation. Problem description: Socket connections require high coaxiality, but existing designs lack guiding structures or automatic alignment mechanisms, which can easily lead to eccentricity, jamming, or damage to the sealing ring during installation.

[0007] Technical limitations: The lack of guide chamfers, guide pins, or flexible centering structures makes installation particularly difficult, especially when working at heights or in confined spaces. Consequences: Increased construction difficulty, impacting installation efficiency and connection quality.

[0008] 4. Inconvenient maintenance and inspection: The sealing condition cannot be monitored online and must be disassembled to check the condition of the sealing ring; moreover, replacing the sealing ring requires complete disassembly, resulting in high maintenance costs.

[0009] Technical limitations: Lack of integrated pressure test port, seal status indicator, or removable seal module. Consequences: Hinders preventative maintenance and intelligent management.

[0010] 5. Poor adaptability to high and low temperature conditions. Problem description: In high temperature (>150℃) or low temperature (<-20℃) environments, the sealing material is prone to failure, and the thermal expansion coefficients of metal and non-metal parts do not match, resulting in seal failure.

[0011] Technical limitations: It did not employ high-temperature resistant alloys, low-expansion composite materials, or thermal compensation structures. Consequences: It limits its application in extreme temperature environments. Summary of the Invention

[0012] The purpose of this utility model is to provide a socket-locking reducing plate that is firmly connected, safe and reliable, not easy to fall off, and does not require additional assistance. It overcomes the shortcomings of the original market technology. The purpose of this utility model is achieved as follows: it includes a socket-locking reducing plate body, a positioning / limiting pin, a U-shaped wire, a nut, and a sealing ring. The bottom end of the socket-locking reducing plate body is connected to the upper end of the U-shaped wire and fixed by the nut; the positioning / limiting pin is inserted into the through hole of the socket-locking reducing plate body; the bottom of the socket-locking reducing plate body is sealed with a sealing ring.

[0013] The socket-type variable diameter disc body is provided with connecting discs at both the upper and lower ends. The lower connecting disc is provided with a U-shaped wire connecting hole. A limit hole is provided in the middle of the lower connecting disc. A sealing groove is provided on the bottom surface of the lower connecting disc, and a sealing rubber ring is provided in the sealing groove.

[0014] The inner lower side of the socket-type reducing disc body is provided with a sealing four-way connecting step, the length of which is half of the inner diameter; the inner diameter of the sealing four-way connecting step is larger than the outer diameter of the sealing four-way; a concave stop is provided on the outer side of the middle bottom of the socket-type reducing disc body, which is combined with the upper part of the sealing four-way to ensure concentricity; a flange hole and a convex stop are provided on the top of the socket-type reducing disc body.

[0015] The U-shaped wire has connecting threads at both ends, which facilitates nut connection and the tightness of the nut connection is adjustable.

[0016] Application method of this utility model: This socket-locking reducing plate is used in conjunction with a dedicated sealing four-way valve. The inner side of the lower part of the reducing plate is inserted into the outer side of the upper part of the sealing four-way valve. Rotating the reducing plate aligns the positioning hole of the reducing plate with the positioning hole of the sealing four-way valve, and inserting the positioning pin. Furthermore, the outer side of the bottom of the reducing plate has a concave stop that aligns with the upper part of the sealing four-way valve to ensure concentricity. The bottom of the reducing plate has an O-ring groove that aligns with the upper part of the sealing four-way valve. Two U-bolts are inserted from the bottom of the sealing four-way valve towards the lower part of the reducing plate. When the U-bolts on both sides are tightened, the sealing ring between the reducing plate and the sealing four-way valve is compressed, achieving a sealing effect. The top of the reducing plate has a flange hole and a convex stop for connection to specialized equipment such as a clamp valve. After use, the U-bolts are removed, the positioning pin is pulled out, and the reducing plate is removed for future use.

[0017] Significance of this invention: This invention is applicable to the connection and transition of dedicated sealing four-way fittings. The socket-type reducing plate adopts an integrated or split structure design, achieving a quick, sealed, and reliable reducing connection through the cooperation of the socket and spigot. It has a simple structure, is easy to install, and has strong pressure resistance, making it suitable for various industrial pipeline systems such as chemical, petroleum, natural gas, and water supply and drainage. This invention solves the problems of complex installation, poor sealing, and easy leakage of traditional reducing pipe fittings, and has good engineering application prospects. The socket-locking reducing plate has a simple structure, is easy to operate, and is reusable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a socket-locking reducing disc. In the diagram, 1 is the reducing disc body, 2 is the positioning / limiting pin, 3 is the U-shaped thread, 4 is the nut, and 5 is the sealing ring.

[0019] Figure 2 This is an assembly diagram for the application of a socket-locking reducing disc. In the diagram, 1 is the reducing disc body, 2 is the positioning / limiting pin, 3 is the U-shaped thread, 4 is the nut, and 5 is the sealing ring.

[0020] Figure 3 This is a schematic diagram of a socket-locking reducing disc. In the diagram, 1 is the reducing disc body, 2 is the positioning / limiting pin, and 5 is the sealing ring.

[0021] Figure 4 This is a schematic diagram of the U-shaped wire structure. In the diagram, 4 represents the nut, 3 represents the U-shaped wire. Detailed Implementation

[0022] Example 1: This utility model includes a socket-type variable diameter disc body 1, a positioning / limiting pin 2, a U-shaped wire 3, a nut 4, and a sealing ring 5. The bottom end of the socket-type variable diameter disc body 1 is connected to the upper end of the U-shaped wire 3 and is fixed by the nut 4; the positioning / limiting pin 2 is inserted into the through hole of the socket-type variable diameter disc body 1; the bottom of the socket-type variable diameter disc body 1 is sealed with a sealing ring 5.

[0023] Example 2: The socket-type variable diameter disc body 1 is provided with connecting discs at the upper and lower ends respectively. The lower connecting disc is provided with a U-shaped wire 3 connecting hole; a limit hole is provided in the middle of the lower connecting disc; a sealing groove is provided on the bottom surface of the lower connecting disc, and a sealing rubber ring 5 is provided in the sealing groove.

[0024] Example 3: The lower inner side of the socket-type reducing disc body 1 is provided with a sealing four-way connecting step, the length of which is half of the inner diameter; the inner diameter of the sealing four-way connecting step is larger than the outer diameter of the sealing four-way; a concave stop is provided on the outer side of the middle bottom of the socket-type reducing disc body 1, which is combined with the upper part of the sealing four-way to ensure concentricity; a flange hole and a convex stop are provided on the top of the socket-type reducing disc body 1.

[0025] Example 4: The two ends of the U-shaped wire 3 are provided with connecting threads to facilitate the connection of the nut 4, and the tightness of the nut connection is adjustable.

Claims

1. A socket-locking reducing plate, comprising a socket-locking reducing plate body (1), a positioning / limiting pin (2), a U-shaped thread (3), a nut (4), and a sealing ring (5), characterized in that: The bottom end of the socket-type variable diameter disc body (1) is connected to the upper end of the U-shaped wire (3) and fixed by the nut (4); the positioning / limiting pin (2) is inserted into the through hole of the socket-type variable diameter disc body (1); the bottom of the socket-type variable diameter disc body (1) is sealed with a sealing ring (5).

2. The socket-locking reducing disc according to claim 1, characterized in that: The socket-type variable diameter disc body (1) is provided with connecting discs at the upper and lower ends respectively. The connecting disc at the lower end is provided with a U-shaped wire (3) connecting hole; a limit hole is provided in the middle of the connecting disc at the lower end; a sealing groove is provided on the bottom surface of the connecting disc at the lower end, and a sealing rubber ring (5) is provided in the sealing groove.

3. The socket-locking reducing disc according to claim 1, characterized in that: The inner lower side of the socket-type reducing plate body (1) is provided with a sealing four-way connecting step, the length of which is half of the inner diameter; the inner diameter of the sealing four-way connecting step is larger than the outer diameter of the sealing four-way; the bottom middle outer side of the socket-type reducing plate body (1) is provided with a concave stop, which is combined with the upper part of the sealing four-way to ensure concentricity; the top of the socket-type reducing plate body (1) is provided with a flange hole and a convex stop.

4. The socket-locking reducing disc according to claim 1, characterized in that: The U-shaped wire (3) has connecting threads at both ends, which facilitates the connection of the nut (4), and the tightness of the nut connection is adjustable.

Images