Single seat valve with high precision regulating performance

Abstract

The utility model relates to single seat valve technical field discloses a single seat valve with high accuracy adjusting performance, including valve body, the upside of valve body is connected with valve seat, and the upper connection of valve seat has the valve core, and the upside of valve core is connected with the cylinder pin, the outside of cylinder pin is equipped with the guide sleeve simultaneously, and the outside of guide sleeve is connected with the guide sleeve seat, and the one side of guide sleeve seat is equipped with the toothed washer, the upper side of cylinder pin is equipped with the valve stem simultaneously, and the one side of guide sleeve seat is equipped with the valve cover, and the outside of packing pad is connected with the round nut, and the upper side of packing pad is equipped with the packing assembly, the upper side of packing assembly is equipped with the packing gland simultaneously, and the upper side of packing gland is equipped with the packing gland nut, through the high accuracy optimization design to the overall structure of valve, fluid passage and the structure size of valve seat, valve core and other key valve inner piece, ensure that the flow capacity is big, the flow characteristic curve precision is high, the adjusting performance is good, the action is sensitive, and the minimum of adjusting control precision is one hundredth.

Description

Technical Field

[0001] This utility model relates to the field of single-seat valve technology, specifically a single-seat valve with high-precision adjustment performance. Background Technology

[0002] This utility model relates to the field of fluid control technology and is a single-seat valve with high-precision regulation performance. It is suitable for precise control and regulation of gas, liquid and other fluid media in industries such as petroleum, chemical, metallurgy, fine chemical new materials, natural gas and air separation.

[0003] The valve core's curve characteristics are not machined with high precision, and the dimensional tolerances are large. Especially when the flow characteristics are required to be equal percentages, its flow characteristic curve will be distorted and fluctuate, resulting in poor adjustment accuracy and difficulty in meeting the needs of the increasingly sophisticated process control conditions. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a single-seat valve with high-precision adjustment performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a single-seat valve with high-precision adjustment performance, comprising a valve body, a valve seat connected to the upper side of the valve body, a valve core connected to the upper side of the valve seat, a cylindrical pin connected to the upper side of the valve core, a guide sleeve provided on the outer side of the cylindrical pin, a guide sleeve seat connected to the outer side of the guide sleeve, a toothed gasket provided on one side of the guide sleeve seat, a valve stem provided above the cylindrical pin, a valve cover provided on one side of the guide sleeve seat, a packing pad provided above the valve stem, a round nut connected to the outer side of the packing pad, a packing assembly provided above the packing assembly, a packing gland provided above the packing gland, and a packing gland nut provided above the packing gland.

[0006] As a further description of the above technical solution:

[0007] The valve body has an inlet at one end and an outlet at the other end, and its channel is S-shaped.

[0008] As a further description of the above technical solution:

[0009] The valve core and valve stem are connected by a cylindrical pin, and the valve core can move vertically back and forth above the valve seat.

[0010] As a further description of the above technical solution:

[0011] The valve stem and valve cover are sealed with V-shaped polytetrafluoroethylene packing.

[0012] As a further description of the above technical solution:

[0013] The valve core and valve seat are made of 304+STL.

[0014] As a further description of the above technical solution:

[0015] The valve body is made of CF8 material.

[0016] As a further description of the above technical solution:

[0017] The flow characteristics of the valve core and valve seat are selected as equal percentage, with a flow coefficient of Cv70 and a stroke of 40mm.

[0018] This utility model has the following beneficial effects:

[0019] 1. By performing high-precision optimization design on the overall structure of the valve, the fluid passage and the structural dimensions of key valve internals such as the valve seat and valve core, we ensure large flow capacity, high accuracy of flow characteristic curve, good regulation performance, sensitive action and regulation control accuracy of at least one percent.

[0020] 2. It features good interchangeability of parts, few vulnerable parts, and convenient installation and maintenance. Attached Figure Description

[0021] Figure 1 This is a general structural diagram of the valve section of a single-seat valve with high-precision adjustment performance proposed in this utility model.

[0022] Figure 2 This invention presents a high-precision valve core structure diagram for a single-seat valve with high-precision adjustment performance.

[0023] Figure 3 This is a partial structural diagram of a high-precision valve core for a single-seat valve with high-precision adjustment performance proposed in this utility model.

[0024] Figure 4 This invention presents a high-precision valve seat structure diagram for a single-seat valve with high-precision adjustment performance.

[0025] Legend:

[0026] 1. Valve body; 2. Valve seat; 3. Valve core; 4. Cylindrical pin; 5. Guide sleeve; 6. Guide sleeve seat; 7. Toothed gasket; 8. Valve stem; 9. Valve cover; 10. Packing gasket; 11. Round nut; 12. Packing assembly; 13. Packing gland; 14. Packing gland nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figures 1-4 This utility model provides a single-seat valve with high-precision adjustment performance, including a valve body 1, a valve seat 2 connected to the upper side of the valve body 1, a valve core 3 connected to the upper side of the valve seat 2, a cylindrical pin 4 connected to the upper side of the valve core 3, a guide sleeve 5 provided on the outer side of the cylindrical pin 4, a guide sleeve seat 6 connected to the outer side of the guide sleeve 5, a toothed gasket 7 provided on one side of the guide sleeve seat 6, a valve stem 8 provided above the cylindrical pin 4, a valve cover 9 provided on one side of the guide sleeve seat 6, a packing pad 10 provided above the valve stem 8, a round nut 11 connected to the outer side of the packing pad 10, a packing assembly 12 provided above the packing pad 10, a packing gland 13 provided above the packing assembly 12, and a packing gland nut 14 provided above the packing gland 13.

[0029] The valve body 1 has an inlet at one end and an outlet at the other end, with an S-shaped streamlined channel. The valve core 3 and valve stem 8 are connected by a cylindrical pin 4. The valve core 3 can move vertically and reciprocally above the valve seat 2. The valve stem 8 and valve cover 9 are sealed with V-type polytetrafluoroethylene packing. The valve core 3 and valve seat 2 are made of 304+STL, and the valve body 1 is made of CF8. The flow characteristics of the valve core 3 and valve seat 2 are selected as equal percentage, with a flow coefficient of Cv70 and a stroke of 40mm.

[0030] In this embodiment, the valve body 1 has an inlet at one end and an outlet at the other end, and its channel is S-shaped to reduce fluid resistance and improve flow efficiency. The valve core 3 and the valve stem 8 are connected by a cylindrical pin 4. The valve core 3 can move vertically back and forth above the valve seat 2. By changing the flow cross-sectional area between the valve core 3 and the valve seat 2, the function of precisely regulating the fluid flow and controlling the pressure can be realized. The valve stem 8 and the valve cover 9 are sealed with V-type polytetrafluoroethylene packing to ensure good sealing performance and prevent media leakage.

[0031] In this embodiment, the valve body 1 is made of CF8, and the valve core 3 and valve seat 2 are made of 304+STL, which have high wear resistance and corrosion resistance and are suitable for various media.

[0032] It should be noted that the valve core 3 is shaped as a high-precision curve to ensure high accuracy of the flow characteristic curve and excellent regulation performance.

[0033] As a preferred implementation, the valve seat 2 is designed with high precision to ensure high fitting accuracy with the valve core 3 and low leakage.

[0034] As a preferred embodiment, the packing assembly 12 is made of multilayer polytetrafluoroethylene to ensure good sealing performance.

[0035] In use, when the actuator drives the valve stem 8 to move up and down, the valve core 3 moves up and down accordingly, changing the flow cross-sectional area between the valve core 3 and the valve seat 2, thereby achieving precise control and regulation of the fluid medium.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-seat valve with high-precision regulating performance, characterized in that: The valve body (1) is connected to a valve seat (2) on its upper side. A valve core (3) is connected to the upper side of the valve seat (2). A cylindrical pin (4) is connected to the upper side of the valve core (3). A guide sleeve (5) is provided on the outer side of the cylindrical pin (4). A guide sleeve seat (6) is connected to the outer side of the guide sleeve (5). A toothed gasket (7) is provided on one side of the guide sleeve seat (6). A valve stem (8) is provided above the cylindrical pin (4). A valve cover (9) is provided on one side of the guide sleeve seat (6). A packing pad (10) is provided on the upper side of the valve stem (8). A round nut (11) is connected to the outer side of the packing pad (10). A packing assembly (12) is provided on the upper side of the packing pad (10). A packing gland (13) is provided above the packing assembly (12). A packing gland nut (14) is provided above the packing gland (13).

2. The single-seat valve with high-precision regulating performance according to claim 1, characterized in that: The valve body (1) has an inlet at one end and an outlet at the other end, and its channel is S-shaped.

3. A single-seat valve with high-precision regulating performance according to claim 2, characterized in that: The valve core (3) is connected to the valve stem (8) by a cylindrical pin (4), and the valve core (3) can move back and forth linearly above the valve seat (2).

4. A single-seat valve with high-precision regulating performance according to claim 3, characterized in that: The valve stem (8) and valve cover (9) are sealed with V-type polytetrafluoroethylene packing.

5. A single-seat valve with high-precision adjustment performance according to claim 4, characterized in that: The valve core (3) and valve seat (2) are made of 304+STL.

6. A single-seat valve with high-precision regulating performance according to claim 5, characterized in that: The valve body (1) is made of CF8 material.

7. A single-seat valve with high-precision regulating performance according to claim 6, characterized in that: The flow characteristics of the valve core (3) and valve seat (2) are selected as equal percentages, with a flow coefficient of Cv70 and a stroke of 40mm.

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