A new type of blocking four-way tee

Abstract

The utility model discloses a new type of plugging four -way is pipeline connection and isolation technology, it overcomes the shortcoming of current background technology, it includes four -way body, plug -in board, sealing rubber ring, clamping block, end cover, the upper portion of four -way body is installed plug -in board, and is fixed by clamping block spacing, sealing rubber ring seals, the end cover is fixed at the top of four -way body.

Description

Technical Field

[0001] This utility model relates to pipeline connection and isolation technology, and in particular to a novel sealing four-way valve. Background Technology

[0002] As an important pipe connection and isolation device, the sealing four-way valve is widely used in petroleum, chemical, gas, and water supply and drainage systems to achieve multi-directional connections and temporary or permanent sealing of specific branches. Although several related patents, such as CN223270856U, CN221943573U, and CN202791092U, disclose sealing four-way valves with different structures, existing patented technologies still have many design flaws and technical limitations in practical applications. The main shortcomings are summarized below: The sealing structure is simple and lacks multi-level sealing protection. Most existing patents use a single blind plate or screw plug for sealing, relying on only one sealing ring (such as an O-ring) to achieve sealing, and lack redundant sealing design.

[0003] In high-pressure, high-temperature, or corrosive media environments, single seals are prone to failure due to aging, deformation from compression, or chemical corrosion. Consequences: Leakage risk exists, especially in flammable or toxic media systems, potentially leading to safety accidents.

[0004] The sealing components are difficult to disassemble and assemble, and have low maintenance efficiency. The sealing structure mostly uses bolted blind plates or internally threaded screw plugs. Disassembly and assembly require special tools, and operation is inconvenient when space is limited or when working at height. The lack of quick-assembly and disassembly mechanisms (such as snap-fit, quick-connect, or hydraulic pressing mechanisms) results in long maintenance cycles. Consequences: Reduced system maintenance efficiency and increased downtime costs. 3. The reliability of the sealing depends on manual operation, which is prone to errors. Whether the sealing is in place depends on the operator's experience. There is a lack of visual indicators or mechanical limit confirmation devices, which poses a risk of "false seal".

[0005] Technical limitations: Lack of torque indication, position sensor, or seal status feedback mechanism. Consequence: In unattended or automated systems, it is difficult to guarantee the reliability of the seal. 4. Insufficient material compatibility and corrosion resistance. The main materials are mostly ordinary carbon steel or cast iron, and no corrosion-resistant material options or protective measures are provided for corrosive media (such as H2S, CO2, chloride ions).

[0006] Lack of lining (such as PTFE, ceramic), coating, or cathodic protection design. Consequences: Susceptibility to pitting corrosion and stress corrosion cracking in environments such as chemical plants and offshore platforms. 5. Poor standardization and interchangeability: There is a lack of unified standards for interface dimensions, sealing methods, and sealing forms, making it difficult to interchange products from different manufacturers.

[0007] Technical limitations: It does not follow mainstream standards such as API, ASME, and GB, and has a high degree of customization.

[0008] Consequences: Increased complexity of engineering design, and difficulties in spare parts management and emergency replacement. Summary of the Invention

[0009] The purpose of this utility model is to provide a novel sealing four-way valve for valve replacement without interrupting the flow, which overcomes the shortcomings of the current background technology. The purpose of this utility model is achieved as follows: it includes a four-way body, a plug plate, a sealing ring, a locking block, and a sealing head. The plug plate is installed on the upper part of the four-way body and is limited and fixed by the locking block, and sealed by the sealing ring; the sealing head is fixed on the top of the four-way body.

[0010] The upper inner side of the four-way body is provided with a locking groove; the upper connecting plate of the four-way body is provided with a connecting hole; the top of the four-way body is a 30-degree slope; the upper inner side of the four-way body is provided with a plug plate limiting step to facilitate the limiting and fixing of the plug plate.

[0011] The plug plate has locking slots on both sides, and the position and size of the locking slots in this position are adapted to the locking slots of the four-way body; the plug plate also has sealing grooves on both sides, and sealing rings are provided in the sealing grooves.

[0012] The end cap is semi-circular, with 30-degree bevels at both ends. These bevels match the 30-degree bevel at the top of the four-way body, facilitating welding and fixing.

[0013] The application method of this utility model involves fixing and welding the sealing four-way sleeve to the pressurized steel pipeline during non-stop maintenance such as valve replacement and pipeline relocation. The upper part of the sealing four-way is connected to equipment such as a special reducing plate and special clamp valve. The positioning hole on the upper part of the sealing four-way and the flange hole of the reducing plate are used to ensure concentricity and limit the movement. After the connection is completed, a series of opening and sealing operations are performed inside the sealing four-way to achieve non-stop maintenance such as valve replacement and pipeline relocation.

[0014] After the maintenance work is completed, install the sealing ring on the plug plate and connect it to the lower plug. Adjust the locking block to the retracted position via the main shaft of the lower plug and install it on the equipment on the upper part of the sealing four-way fitting. Send the plug plate into the designated position of the sealing four-way. After the plug plate reaches the designated position, the sealing ring of the plug plate forms a seal with the inner wall of the sealing four-way. Then, rotate the outer shaft of the lower plug clockwise to drive the connecting plate at the bottom of the lower plug. When the connecting plate rotates clockwise, it pushes out the locking block, causing the locking block to be pushed into the locking groove inside the sealing four-way. After the plug plate and locking block are locked in the locking groove of the sealing four-way, remove the lower plug clamp valve and other equipment. After the equipment is removed, place the end cap at the 30° bevel at the top of the sealing four-way and weld it in place. The significance of this utility model is that it eliminates any leakage risks associated with threads, bolts, and gaskets, thus completely achieving the technical requirement of no leakage. The simple structure of this sealing four-way valve reduces the corrosion resistance of irregularly shaped parts compared to traditional flange-type sealing four-way valves, saving on corrosion-resistant materials. Furthermore, this utility model allows for valve replacement without interrupting the transport process, greatly improving transport efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a new type of sealing four-way valve. In the diagram, 1 is the four-way valve body, 2 is the plugging plate, 3 is the sealing ring, 4 is the locking block, and 5 is the end cap.

[0016] Figure 2 This is a structural diagram of a four-way block. In the diagram, 1 represents the four-way body, 6 represents the locking groove, 7 represents the connecting hole, 8 represents the inclined surface, and 9 represents the limiting step of the blocking plate.

[0017] Figure 3 This is a top view of the plug plate, showing 2, the plug plate 4, and the locking block.

[0018] Figure 4 This is a schematic diagram of the end cap, showing 5, 10, and the inclined surface of the end cap. Detailed Implementation

[0019] Example 1: This utility model includes a four-way body 1, a plug plate 2, a sealing ring 3, a locking block 4, and a sealing head 5. The plug plate 2 is installed on the upper part of the four-way body 1 and is limited and fixed by the locking block 4. The sealing ring 3 is used for sealing. The sealing head 5 is fixed on the top of the four-way body 1.

[0020] Example 2: The upper inner side of the four-way body 1 is provided with a locking groove 6; the upper connecting plate of the four-way body 1 is provided with a connecting hole 7; the top of the four-way body 1 is a 30-degree inclined surface 8; the upper inner side of the four-way body 1 is provided with a plug plate limiting step 9, which facilitates the limiting and fixing of the plug plate 2.

[0021] Example 3: The plug plate 2 has locking grooves on both sides, and the position and size of the locking grooves in this position are adapted to the locking grooves of the four-way body 1; the plug plate 2 has sealing grooves on both sides, and sealing rings 3 are provided in the sealing grooves.

[0022] Example 4: The end cap 5 is semi-circular, and both ends of the end cap 5 are 30-degree end cap slopes 10. The slopes at this position are adapted to the 30-degree slopes 8 at the top of the four-way body 1, which facilitates welding and fixing.

Claims

1. A novel sealing four-way valve, characterized in that, The four-way body (1), plug plate (2), sealing ring (3), locking block (4), and end cap (5) are included. The plug plate (2) is installed on the upper part of the four-way body (1) and is limited and fixed by the locking block (4). The sealing ring (3) is sealed. The end cap (5) is fixed on the top of the four-way body (1).

2. The novel sealing four-way valve according to claim 1, characterized in that: The upper inner side of the four-way body (1) is provided with a locking groove (6); the upper connecting plate of the four-way body (1) is provided with a connecting hole (7); the top of the four-way body (1) is a 30-degree inclined surface (8); the upper inner side of the four-way body (1) is provided with a plug plate limiting step (9) to facilitate the limiting and fixing of the plug plate (2).

3. A novel sealing four-way valve according to claim 1, characterized in that: The plug plate (2) is provided with locking slots on both sides. The locking slots at this position are adapted to the locking slots of the four-way body (1) in terms of position and size. The plug plate (2) is provided with sealing slots on both sides, and sealing rings (3) are provided in the sealing slots.

4. A novel sealing four-way valve according to claim 1, characterized in that: The end cap (5) is semi-circular, and its two ends are end cap slopes (10) of 30 degrees. The slopes at this position are adapted to the top of the four-way body (1) which is a slope (8) of 30 degrees, so as to facilitate welding and fixing.

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