A valve seal structure

Abstract

The utility model provides a valve sealing structure, including valve seat, valve body, handle, pressing plate, sealing block, spring and filler, install the cavity in valve seat, the surface of valve seat is provided with the water inlet that links up with install the cavity, the lateral wall of valve seat is provided with the water outlet, the valve body is installed in install the cavity, be equipped with the valve cavity of L type in the valve body, water source enters from the water inlet of valve seat, after flowing through the valve cavity in the valve body, discharges from the water outlet, rotate the valve body through the handle, make the valve cavity vertical part port in the valve body aligns the sealing block, under the plugging of sealing block, water flow cut-off, sealing block is in the effect under the spring, close in the valve cavity vertical part port, realize primary seal, press the filler simultaneously with pressing plate, make the filler expand deformation at the junction of sealing groove and spacing chamber, avoid water flow to enter sealing groove, cooperate again the sealing ring that installs in the sealing groove on the valve body, realize the secondary seal to the valve body, under the guarantee of double seal, the sealing property when the valve is closed is improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of valve sealing structures, and in particular to a valve sealing structure. Background Technology

[0002] As a key component of fluid control systems, the sealing performance of valves directly affects the reliability and safety of equipment operation. Traditional valve sealing structures are mainly divided into two categories: hard seals and soft seals. Hard seals rely on high-precision fit between metal components to achieve sealing. Although they can withstand high pressure and high temperature, they require extremely high precision in machining and assembly, and are prone to leakage due to wear after long-term use. Soft seals use non-metallic sealing components such as rubber and polytetrafluoroethylene. Although they have good initial sealing effect and flexible opening and closing, they are prone to aging and failure under corrosive media or high-temperature conditions, resulting in a limited service life.

[0003] For three-way valves, the valve body is rotated to switch the water path on the connecting side. This causes the valve body to rotate frequently, resulting in frequent wear of the sealing rings on the valve body, a short service life, and insufficient sealing performance. Therefore, providing a valve sealing structure with good sealing performance has become an urgent problem to be solved. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the aforementioned problems in the prior art, this utility model provides a valve sealing structure.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] A valve sealing structure includes a valve seat, a valve body, a handle, a pressure plate, a sealing block, a spring, and packing. The valve seat has an installation cavity, and the surface of the valve seat has an inlet communicating with the installation cavity. The side wall of the valve seat has an outlet. The valve body is installed in the installation cavity and has an L-shaped valve cavity inside. The horizontal port of the valve cavity is aligned with the inlet, and the vertical port of the valve cavity is aligned with the outlet.

[0009] A sealing groove is provided on the side wall of the valve seat where there is no outlet. The sealing groove is connected to the mounting cavity. The sealing block is installed in the sealing groove. An arc-shaped groove adapted to the valve body is provided at one end of the sealing block near the valve body. The pressure plate is provided at the other end of the sealing block. A limiting cavity corresponding to the pressure plate is provided in the valve seat. The spring is installed in the limiting cavity. The packing surrounds the sealing block and fills the connection between the sealing groove and the limiting cavity under the compression of the pressure plate.

[0010] The handle is installed at the end of the valve body away from the valve seat.

[0011] Preferably, the valve body has two sealing grooves, which are respectively located on the front and rear sides of the vertical port of the valve cavity, and a sealing ring is installed in the sealing groove.

[0012] Preferably, the sealing ring is a nitrile rubber sealing ring.

[0013] Preferably, the filler is made of polytetrafluoroethylene.

[0014] Preferably, water outlets are provided on three of the side walls of the valve seat.

[0015] (III) Beneficial Effects

[0016] The beneficial effects of this utility model are as follows: Using the above technical solution, water enters from the inlet of the valve seat, flows through the valve cavity inside the valve body, and is discharged from the outlet. By rotating the valve body with the handle, the vertical portion of the valve cavity inside the valve body is aligned with the sealing block. Under the sealing block's blocking effect, the water flow is stopped. Under the action of the spring, the sealing block is tightly pressed against the vertical portion of the valve cavity, achieving a primary seal. Simultaneously, the pressure plate squeezes the packing, causing the packing to expand and deform at the connection between the sealing groove and the limiting cavity, preventing water from entering the sealing groove. Combined with the sealing ring installed in the sealing groove on the valve body, a secondary seal is achieved for the valve body. With the guarantee of this double seal, the sealing performance when the valve is closed is greatly improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a valve sealing structure;

[0018] Figure 2 This is a schematic diagram of the internal structure of a valve sealing structure.

[0019] Figure 3 This is a schematic diagram of the connection structure between the pressure plate and the sealing block.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1. Valve seat;

[0022] 2. Spring;

[0023] 3. Pressure plate;

[0024] 4. Water inlet;

[0025] 5. Sealing block;

[0026] 6. Valve cavity;

[0027] 7. Water outlet;

[0028] 8. Valve body;

[0029] 9. Handle;

[0030] 10. Packing material. Detailed Implementation

[0031] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figures 1 to 3 This utility model provides a valve sealing structure, including a valve seat 1, a valve body 8, a handle 9, a pressure plate 3, a sealing block 5, a spring 2, and a packing 10. The valve seat 1 has an installation cavity, and the surface of the valve seat 1 is provided with an inlet 4 that communicates with the installation cavity. The side wall of the valve seat 1 has an outlet 7. The valve body 8 is installed in the installation cavity, and the valve body 8 has an L-shaped valve cavity 6. The horizontal part of the valve cavity 6 is aligned with the inlet 4, and the vertical part of the valve cavity 6 is aligned with the outlet 7.

[0033] A sealing groove is provided on the side wall of the valve seat 1 where the outlet 7 is not provided. The sealing groove is connected to the installation cavity. The sealing block 5 is installed in the sealing groove. The end of the sealing block 5 near the valve body 8 is provided with an arc-shaped groove that matches the valve body 8. The other end of the sealing block 5 is provided with a pressure plate 3. The valve seat 1 is provided with a limiting cavity corresponding to the pressure plate 3. The spring 2 is installed in the limiting cavity. The packing 10 surrounds the sealing block 5 and fills the connection between the sealing groove and the limiting cavity under the pressure of the pressure plate 3.

[0034] The handle 9 is installed at the end of the valve body 8 away from the valve seat 1;

[0035] In use, water enters from the inlet 4 of the valve seat 1, flows through the valve cavity 6 inside the valve body 8, and is discharged from the outlet 7. By rotating the valve body 8 with the handle 9, the vertical part of the valve cavity 6 inside the valve body 8 is aligned with the sealing block 5. With the sealing block 5 blocking the flow of water, the sealing block 5 is tightly attached to the vertical part of the valve cavity 6 under the action of the spring 2, achieving a first-level seal. At the same time, the pressure plate 3 squeezes the packing 10, causing the packing 10 to expand and deform at the connection between the sealing groove and the limiting cavity, preventing water from entering the sealing groove. Combined with the sealing ring installed in the sealing groove on the valve body 8, a second-level seal is achieved for the valve body 8. With the guarantee of double sealing, the sealing performance when the valve is closed is greatly improved.

[0036] It should be noted that after the packing 10 is fully compressed and expanded by the pressure plate 3, the gap between the sealing block 5 and the valve body 8 is 0.2–0.5 mm.

[0037] In this embodiment, two sealing grooves are provided on the valve body 8. The two sealing grooves are respectively located on the front and rear sides of the vertical port of the valve cavity 6, and sealing rings are installed in the sealing grooves.

[0038] In this embodiment, the sealing ring is a nitrile rubber sealing ring.

[0039] In this embodiment, the filler 10 is made of polytetrafluoroethylene.

[0040] In this embodiment, water outlets 7 are provided on three of the side walls of the valve seat 1.

[0041] The working principle of this utility model is as follows:

[0042] Water enters from the inlet 4 of valve seat 1, flows through the valve cavity 6 inside valve body 8, and is discharged from the outlet 7. By rotating valve body 8 with handle 9, the vertical part of valve cavity 6 inside valve body 8 is aligned with sealing block 5. Under the sealing of sealing block 5, the water flow is stopped. Under the action of spring 2, sealing block 5 is tightly attached to the vertical part of valve cavity 6, achieving primary sealing. At the same time, pressure plate 3 squeezes packing 10, causing packing 10 to expand and deform at the connection between sealing groove and limiting cavity, preventing water from entering sealing groove. Combined with the sealing ring installed in sealing groove on valve body 8, secondary sealing of valve body 8 is achieved. With the protection of double sealing, the sealing performance when the valve is closed is greatly improved.

[0043] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0044] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A valve sealing structure, characterized in that, The valve includes a valve seat, valve body, handle, pressure plate, sealing block, spring, and packing. The valve seat has an installation cavity, and the surface of the valve seat has an inlet that communicates with the installation cavity. The side wall of the valve seat has an outlet. The valve body is installed in the installation cavity and has an L-shaped valve cavity inside. The horizontal port of the valve cavity is aligned with the inlet, and the vertical port of the valve cavity is aligned with the outlet. A sealing groove is provided on the side wall of the valve seat where there is no outlet. The sealing groove is connected to the mounting cavity. The sealing block is installed in the sealing groove. An arc-shaped groove adapted to the valve body is provided at one end of the sealing block near the valve body. The pressure plate is provided at the other end of the sealing block. A limiting cavity corresponding to the pressure plate is provided in the valve seat. The spring is installed in the limiting cavity. The packing surrounds the sealing block and fills the connection between the sealing groove and the limiting cavity under the compression of the pressure plate. The handle is installed at the end of the valve body away from the valve seat.

2. The valve sealing structure according to claim 1, characterized in that, The valve body has two sealing grooves, which are respectively located on the front and rear sides of the vertical port of the valve cavity, and sealing rings are installed in the sealing grooves.

3. The valve sealing structure according to claim 2, characterized in that, The sealing ring is a nitrile rubber sealing ring.

4. The valve sealing structure according to claim 1, characterized in that, The filler is made of polytetrafluoroethylene.

5. A valve sealing structure according to claim 1, characterized in that, The valve seat has outlets on three of its side walls.

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