An eccentric valve spool

Abstract

The utility model discloses an eccentric valve valve core, including the pressing plate, the valve core head and the valve core seat, the valve core head is installed to the outside of valve core seat, the valve core head is fixed on the valve core seat through the pressing plate, the fixed between pressing plate and valve core seat through bolt, the outside surface of valve core head is spherical camber surface, the valve core head adopts tungsten carbide to make. The utility model, have extremely high hardness can resist strong wear, in the severe working condition of medium high pressure and certain temperature, tungsten carbide can resist the long -term grinding of coal particle by virtue of extremely high hardness, avoid the medium leakage caused by the too fast wear of sealing surface, reduce the overhaul frequency greatly, improve the performance and service life of eccentric valve, guarantee the sealing reliability of sealing surface.

Description

Technical Field

[0001] This utility model relates to the field of valve core technology, specifically an eccentric valve core. Background Technology

[0002] The eccentric valve core is made entirely of tungsten carbide, making it suitable for media in coal chemical systems such as black water, slag water, and ash water, which contain a large number of solid particles and are highly corrosive.

[0003] Traditional valve cores are one-piece structures, with hard alloy overlays welded onto the surface. However, due to the limited coating thickness, the coating is prone to peeling or damage, leading to sealing failure. To address this, we propose an eccentric valve core. Utility Model Content

[0004] The purpose of this invention is to provide an eccentric valve core to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an eccentric valve core, comprising a pressure plate, a valve core head, and a valve core seat, wherein the valve core head is mounted on the outer side of the valve core seat, the valve core head is fixed to the valve core seat by the pressure plate, the pressure plate and the valve core seat are fixed together by bolts, the outer surface of the valve core head is a spherical arc surface, and the valve core head is made of tungsten carbide.

[0006] Preferably, a connecting plate is provided on one side of the valve core seat, and a connecting seat is provided at the end of the connecting plate away from the valve core seat. The connecting seat has a coaxial hole and multiple keyways are provided at equal intervals at the coaxial hole.

[0007] Preferably, there are six keyways in total.

[0008] Preferably, the valve core seat, connecting plate, and connecting seat are an integral structure.

[0009] Preferably, the contact surface between the valve core seat and the valve core head is a stepped structure, and the contact surface between the pressure plate and the valve core head is a stepped structure.

[0010] Compared with the prior art, the beneficial effects of this utility model are: A valve core head is installed on the outside of the valve core seat. The valve core head is fixed to the valve core seat by a pressure plate. The pressure plate and the valve core seat are fixed together by bolts. The valve core head is made of tungsten carbide, which has extremely high hardness and can withstand strong wear. Under the harsh conditions of medium and high pressure and certain temperature, tungsten carbide, with its extremely high hardness (HRC72), can resist long-term grinding of coal particles, avoid medium leakage caused by rapid wear of the sealing surface, greatly reduce the maintenance frequency, improve the performance and service life of the eccentric valve, and ensure the sealing reliability of the sealing surface.

[0011] The eccentric valve core, made of integral tungsten carbide, is better suited to these harsh working conditions, extending the valve's service life and reducing equipment downtime and maintenance. Integral tungsten carbide boasts superior hardness and wear resistance, reaching HRC72 at room temperature. Its valve sealing surface lifespan is 5-10 times that of commonly used metal materials. In a typical coal chemical plant, a typical 304 valve core lasts one week, a cemented carbide valve core one month, while an integral tungsten carbide valve core lasts over three years, extending the replacement cycle of core valve components and reducing downtime losses.

[0012] The integral tungsten carbide of the eccentric valve core enhances the erosion resistance of the valve core and seat. In key valves such as coal slurry conveying valves and gasifier feed valves, the valve core and seat are subjected to high-speed media impacts for a long time, and the integral tungsten carbide can effectively resist this erosion. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Bolt; 2. Pressure plate; 3. Valve core head; 4. Valve core seat; 5. Connecting plate; 6. Connecting seat; 7. Coaxial hole; 8. Keyway. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0016] Please see Figure 1In this embodiment of the utility model, an eccentric valve core includes a pressure plate 2, a valve core head 3, and a valve core seat 4. The valve core head 3 is installed on the outer side of the valve core seat 4. The valve core head 3 is fixed to the valve core seat 4 by the pressure plate 2. The pressure plate 2 and the valve core seat 4 are fixed by bolts 1. The outer surface of the valve core head 3 is a spherical arc surface. The valve core head 3 is made of tungsten carbide, which has extremely high hardness and can withstand strong wear. Under the harsh working conditions of medium and high pressure and certain temperature, tungsten carbide, with its extremely high hardness (HRC72), can resist long-term grinding of coal particles, avoid medium leakage caused by rapid wear of the sealing surface, greatly reduce the maintenance frequency, improve the performance and service life of the eccentric valve, and ensure the sealing reliability of the sealing surface. The contact surface between the valve core seat 4 and the valve core head 3 has a stepped structure, and the contact surface between the pressure plate 2 and the valve core head 3 has a stepped structure.

[0017] A connecting plate 5 is provided on one side of the valve core seat 4, and a connecting seat 6 is provided at the end of the connecting plate 5 away from the valve core seat 4. The valve core seat 4, the connecting plate 5 and the connecting seat 6 are an integral structure. The connecting seat 6 has a coaxial hole 7 and a plurality of keyways 8 are provided at equal intervals at the coaxial hole 7. There are a total of six keyways 8.

[0018] The working principle of this utility model is as follows: A valve core head 3 is installed on the outside of the valve core seat 4. The valve core head 3 is fixed on the valve core seat 4 by the pressure plate 2. The pressure plate 2 and the valve core seat 4 are fixed by bolts 1. The valve core head 3 is made of tungsten carbide, which has extremely high hardness and can withstand strong wear. Under the harsh working conditions of medium and high pressure and certain temperature, tungsten carbide has extremely high hardness (HRC72) and can resist long-term grinding of coal particles, avoid medium leakage caused by excessive wear of the sealing surface, greatly reduce the maintenance frequency, improve the performance and service life of the eccentric valve, and ensure the sealing reliability of the sealing surface. The eccentric valve core, made of integral tungsten carbide, is better suited to these harsh working conditions, extending the valve's service life and reducing equipment downtime and maintenance. Integral tungsten carbide boasts superior hardness and wear resistance, reaching HRC72 at room temperature. Its valve sealing surface lifespan is 5-10 times that of commonly used metal materials. In a typical coal chemical plant, a typical 304 valve core lasts one week, a cemented carbide valve core one month, while an integral tungsten carbide valve core lasts over three years, extending the replacement cycle of core valve components and reducing downtime losses.

[0019] The integral tungsten carbide of the eccentric valve core enhances the erosion resistance of the valve core and seat. In key valves such as coal slurry conveying valves and gasifier feed valves, the valve core and seat are subjected to high-speed media impacts for a long time, and the integral tungsten carbide can effectively resist this erosion.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. An eccentric valve core, characterized in that: It includes a pressure plate (2), a valve core head (3) and a valve core seat (4). The valve core head (3) is installed on the outside of the valve core seat (4). The valve core head (3) is fixed on the valve core seat (4) by the pressure plate (2). The pressure plate (2) and the valve core seat (4) are fixed by bolts (1). The outer surface of the valve core head (3) is a spherical arc surface. The valve core head (3) is made of tungsten carbide.

2. The eccentric valve core according to claim 1, characterized in that: A connecting plate (5) is provided on one side of the valve core seat (4), and a connecting seat (6) is provided at the end of the connecting plate (5) away from the valve core seat (4). The connecting seat (6) has a coaxial hole (7), and multiple keyways (8) are provided at equal intervals at the coaxial hole (7).

3. The eccentric valve core according to claim 2, characterized in that: There are a total of six keyways (8).

4. The eccentric valve core according to claim 2, characterized in that: The valve core seat (4), connecting plate (5) and connecting seat (6) are an integral structure.

5. The eccentric valve core according to claim 1, characterized in that: The contact surface between the valve core seat (4) and the valve core head (3) is a stepped structure, and the contact surface between the pressure plate (2) and the valve core head (3) is a stepped structure.

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