A high-platform ball valve with double sealing

Abstract

This utility model discloses a high-platform ball valve with double sealing. It is characterized by comprising a valve body and a valve cover disposed at one end of the valve body. A first soft seal is provided at the contact surface between the valve body and the valve cover, and the first soft seal is disposed within a groove formed in the valve body. A first hard seal is also provided at the contact surface between the valve body and the valve cover, and the first hard seal is disposed inside the soft seal. This utility model achieves double sealing of the sealing parts in the ball valve, significantly improving reliability.

Description

Technical Field

[0001] This utility model relates to the field of valve sealing technology, specifically to a high-platform ball valve with double sealing, which is particularly suitable for fluid control in harsh working conditions such as petroleum and chemical industries. Background Technology

[0002] Ball valves and gate valves belong to the same type of valve. The difference is that the closing element of a ball valve is a ball. The ball rotates around the center line of the valve body to open and close the valve. Ball valves are mainly used in pipelines for shut-off, distribution and changing the flow direction of the medium. Ball valves are a widely used new type of valve.

[0003] Ball valves generally consist of a valve body and a valve stem. Existing ball valves achieve sealing by using sealing rings supported by engineering plastics. However, engineering plastics require extremely high processing precision; even micron-level gaps can lead to leakage, resulting in insufficient dynamic sealing. Summary of the Invention

[0004] The purpose of this invention is to provide a high-platform ball valve with double sealing to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-platform ball valve with double sealing is characterized in that it includes a valve body and a valve cover disposed at the end of the valve body, wherein a first soft seal is provided at the contact surface between the valve body and the valve cover, the first soft seal is disposed in a groove formed on the valve body, and a first hard seal is also provided at the contact surface between the valve body and the valve cover, the first hard seal being disposed inside the soft seal.

[0007] The present invention further includes a valve stem disposed within the valve body, a valve ball connected to the valve stem, the valve ball being located between the valve cover and the valve body, a valve seat disposed between the valve ball and the valve cover, a first hard seal disposed between the valve seat and the valve body, and a second soft seal disposed between the valve seat and the valve cover.

[0008] The present invention further includes a third soft seal and a third hard seal between the valve stem and the valve body. The third soft seal is located closer to the valve ball, and the third hard seal is located further away from the valve ball.

[0009] The present invention is further provided that the first soft seal, the second soft seal, and the third soft seal are made of rubber material.

[0010] The present invention further comprises that the first hard seal and the second hard seal are made of engineering plastics.

[0011] In a further embodiment of this invention, the first soft sealing element is an O-ring.

[0012] In a further embodiment of this invention, the second soft sealing element is an O-ring.

[0013] In a further embodiment of this invention, the third soft sealing element is an O-ring.

[0014] The present invention further provides that the third hard seal includes several V-shaped packings, metal gaskets, and packing sleeves, wherein the packings are stacked, and the packing sleeves and metal gaskets are distributed on both sides of the packings.

[0015] The present invention further provides that the valve body and the valve cover are double-sealed by a first hard seal and a first soft seal.

[0016] The present invention further provides that the valve cover and the valve ball are connected by a valve seat and a second soft seal to form a double seal.

[0017] The present invention further provides that the valve stem and the valve body are connected by a third soft seal and a third hard seal to form a double seal.

[0018] The beneficial effects of this utility model are: comprehensive dual sealing in all positions significantly improves reliability; specifically as follows: A dual structure of "soft seal + hard seal" is adopted at key sealing positions such as valve body and valve cover, valve ball and valve cover, and valve stem and valve body. In the static seal, the first soft seal provides initial elastic compensation, while the first hard seal forms a rigid seal under high pressure, preventing leakage caused by material aging or pressure fluctuations in a single seal. In the dynamic seal (valve stem-valve body), the third soft seal is resistant to media corrosion, and the third hard seal adapts to wear through multi-layer packing compression, extending the valve stem seal life. In the valve ball seal, the second soft seal compensates for the assembly tolerances of the valve seat and valve cover, and the second hard seal fits precisely with the valve ball, reducing opening and closing torque while minimizing wear. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Reference numerals: 10, valve body; 20, valve cover; 30, valve stem; 40, valve seat; 50, first hard seal; 60, first soft seal; 70, packing sleeve; 80, valve ball; 90, second soft seal; 100, third soft seal; 110, third hard seal; 120, packing; 130, metal gasket; Detailed Implementation

[0022] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] like Figure 1 As shown, this utility model provides a high-platform ball valve with double sealing, including a valve body 10 and a valve cover 20 disposed at one end of the valve body 10. A first soft seal 60 is provided at the contact surface between the valve body 10 and the valve cover 20, and the first soft seal 60 is disposed in a groove formed on the valve body 10. A first hard seal 50 is also provided at the contact surface between the valve body 10 and the valve cover 20, and the first hard seal 50 is disposed inside the soft seal. The valve body 10 and the valve cover 20 form a double seal through the first hard seal 50 and the first soft seal 60.

[0024] On the other hand, a valve stem 30 is provided inside the valve body 10, and a valve ball 80 is connected to the valve stem 30. The valve ball 80 is located between the valve cover 20 and the valve cover 20. A valve seat 40 is provided between the valve ball 80 and the valve cover 20. A first hard seal 50 is provided between the valve seat 40 and the valve body 10, and a second soft seal 90 is provided between the valve seat 40 and the valve cover 20. The valve cover 20 and the valve ball 80 form a double seal through the valve seat 40 and the second soft seal 90. The valve seat 40 serves as the second hard seal.

[0025] On the other hand, a third soft seal 100 and a third hard seal 110 are provided between the valve stem 30 and the valve body 10. The third soft seal 100 is located closer to the valve ball 80, and the third hard seal 110 is located away from the valve ball 80. The valve stem 30 and the valve body 10 form a double seal through the third soft seal 100 and the third hard seal 110.

[0026] In this embodiment, the first soft seal 60, the second soft seal 90, and the third soft seal 100 are made of rubber material, while the first hard seal 50 and the second hard seal are made of engineering plastic.

[0027] Specifically, the first soft seal 60 is an O-ring. The second soft seal 90 is an O-ring. The third soft seal 100 is an O-ring.

[0028] The third hard seal 110 includes several V-shaped packings 120, metal gaskets 130, and packing sleeves 70. The packings 120 are stacked, and the packing sleeves 70 and metal gaskets 130 are distributed on both sides of the packings 120.

[0029] This invention achieves full-position dual sealing for ball valves, significantly improving reliability. Specifically, it employs a dual structure of "soft seal + hard seal" at key sealing positions such as valve body 10 and valve cover 20, valve ball 80 and valve cover 20, and valve stem 30 and valve body 10. In the static seal, the first soft seal 60 provides initial elastic compensation, while the first hard seal 50 forms a rigid seal under high pressure, preventing leakage caused by material aging or pressure fluctuations in a single seal. In the dynamic seal (valve stem 30 - valve body 10), the third soft seal 100 is resistant to media corrosion, and the third hard seal 110 is self-adaptive to wear through multi-layer packing 120 compression, extending the sealing life of valve stem 30. The valve ball 80 seal uses the second soft seal 90 to compensate for the assembly tolerances between valve seat 40 and valve cover 20, and the second hard seal fits precisely with the valve ball 80, reducing opening and closing torque while minimizing wear.

[0030] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0031] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0032] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A high-raised ball valve with double seal, characterized in that, The valve includes a valve body and a valve cover disposed at the end of the valve body. A first soft seal is provided at the contact surface between the valve body and the valve cover. The first soft seal is disposed in a groove formed on the valve body. A first hard seal is also provided at the contact surface between the valve body and the valve cover. The first hard seal is disposed inside the soft seal.

2. A high raised ball valve with double seal as claimed in claim 1 wherein, A valve stem is provided inside the valve body, and a valve ball is connected to the valve stem. The valve ball is located between the valve cover and the valve cover. A valve seat is provided between the valve ball and the valve cover. A first hard seal is provided between the valve seat and the valve body, and a second soft seal is provided between the valve seat and the valve cover.

3. A high-raised ball valve with double seal according to claim 2, characterized in that, A third soft seal and a third hard seal are provided between the valve stem and the valve body. The third soft seal is located near the valve ball, and the third hard seal is located away from the valve ball.

4. A high raised ball valve with double seal as claimed in claim 1 or 2 or 3 wherein, The first soft seal, the second soft seal, and the third soft seal are made of rubber material.

5. A high-raised ball valve with double seal according to claim 3, characterized in that, The first and third hard seals are made of engineering plastics.

6. A high-raised ball valve with double seal according to claim 4, characterized in that, The first soft seal is an O-ring; the second soft seal is an O-ring; and the third soft seal is an O-ring.

7. A high-raised ball valve with double seal according to claim 3, characterized in that, The third hard seal includes several V-shaped packings, metal gaskets, and packing sleeves. The packings are stacked, and the packing sleeves and metal gaskets are distributed on both sides of the packings.

8. A high-raised ball valve with double seal according to claim 1, characterized in that, The valve body and valve cover are sealed by a first hard seal and a first soft seal.

9. A high-raised ball valve with double seal according to claim 2, characterized in that, The valve cover and the valve ball are sealed by a valve seat and a second soft seal.

10. A high-raised ball valve with double seal according to claim 3, characterized in that, The valve stem and valve body are sealed by a third soft seal and a third hard seal.

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