Electric proportioning valve

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to an electric proportioning valve which comprises a valve body, a valve shaft is movably connected in the valve body, a valve plate body is fixedly connected to the valve shaft and located in the valve body, and a square bearing seat with a seat is fixedly installed on the lower portion of the outer surface of the valve body. An electric proportional actuator is fixedly installed on the upper portion of the outer surface of the valve body, and the upper portion of the valve shaft is connected with the electric proportional actuator. The valve plate body comprises a first valve plate and a second valve plate, and the valve shaft penetrates through the center of the first valve plate and the center of the second valve plate and is fixedly connected with the first valve plate and the second valve plate. According to the electric proportioning valve, the sealing performance is remarkably improved, the service life is remarkably prolonged and the abrasion and maintenance cost is reduced through the double-valve-plate structure and the double-seal design, namely the soft seal and the hard seal. The sealing performance of the valve shaft is further enhanced through graphite packing packing sealing, and reliable operation of the valve under the working conditions of high pressure difference, high temperature and large flow is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to an electric proportional regulating valve. Background Art

[0002] In the exhaust gas treatment system, electric proportional control valves are widely used in pipelines to accurately control gas flow and pressure. The existing electric proportional control valves often have unsatisfactory sealing effects when the gas flow has a high pressure difference, which easily leads to gas leakage. This leakage not only affects the overall process of exhaust gas treatment, but may also cause exhaust gas emissions to fail to meet standards and violate environmental regulations. In addition, during the long-term use of the existing electric proportional control valves, the wear between the valve plate and the valve seat is relatively serious, resulting in a shortened valve life and increased maintenance costs. Therefore, we propose an electric proportional control valve. Utility Model Content

[0003] The main purpose of the utility model is to provide an electric proportional control valve, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An electric proportional control valve comprises a valve body, a valve shaft is movably connected in the valve body, a valve plate body is fixedly connected to the valve shaft, and the valve plate body is located in the valve body, a square bearing seat with a seat is fixedly installed on the lower part of the outer surface of the valve body, an electric proportional actuator is fixedly installed on the upper part of the outer surface of the valve body, and the upper part of the valve shaft is connected to the electric proportional actuator;

[0006] The valve plate body comprises a first valve plate and a second valve plate, and the valve shaft passes through the centers of the first valve plate and the second valve plate and is fixedly connected to the first valve plate and the second valve plate.

[0007] Preferably, the first valve plate and the second valve plate have the same structure and are distributed front to back.

[0008] By adopting the above technical solution: by providing the first valve plate and the second valve plate, a double-layer valve plate design is realized, the wear between the valve plate body and the valve seat is reduced, and the service life of the valve seat is increased.

[0009] Preferably, a sealing gasket is provided between the first valve plate and the second valve plate, and the outer surface of the sealing gasket is in contact with the inner surface of the valve body.

[0010] By adopting the above technical solution, the outer surface of the sealing gasket fits with the inner surface of the valve body to form a soft seal.

[0011] Preferably, two valve seats are fixedly connected to the inner surface of the valve body, and the two valve seats are symmetrically distributed and are respectively located at the front and rear ends of the valve plate body.

[0012] By adopting the above technical solution: the material of the valve seat is metal with high pressure resistance and wear resistance, so that the valve plate body is in close contact with the two valve seats in the valve body to form a hard seal. Through the double sealing mechanism of hard seal and soft seal, the problem of gas leakage under high pressure difference conditions is effectively solved, the overall sealing performance of the valve is improved, and the valve can maintain good sealing performance under different temperature and pressure environments.

[0013] Preferably, the connection between the valve shaft and the valve body is sealed with graphite packing.

[0014] By adopting the above technical solution: the graphite packing has good temperature resistance, pressure resistance and corrosion resistance, further enhancing the sealing between the valve shaft and the valve body, and can effectively prevent the fluid from leaking from the connection between the valve shaft and the valve body, ensuring the reliability of the valve during long-term operation.

[0015] Preferably, the sealing gasket is made of high-temperature fluororubber.

[0016] By adopting the above technical solution, it is possible to maintain good sealing performance under high temperature and high pressure conditions.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. Through the arrangement of the first valve plate and the second valve plate, the double valve plate structure design significantly reduces the wear between the valve plate and the valve seat. When the valve is closed, the first valve plate and the second valve plate can be separated from the valve seat in time, avoiding unnecessary excessive extrusion, thereby extending the service life of the valve seat and the valve plate. In addition, the double valve plate structure increases the contact area when the valve is closed, making the seal tighter, effectively preventing medium leakage, and improving the reliability and stability of the valve.

[0019] 2. The double sealing structure, namely soft seal and hard seal, provides multi-level sealing protection and significantly improves the sealing performance of the valve. The soft seal adopts high-temperature fluororubber pads, which can maintain good sealing performance under high temperature and high pressure conditions and is suitable for various harsh working environments. The hard seal adopts metal materials with high pressure resistance and wear resistance, ensuring that the valve can still maintain a reliable sealing effect during long-term use. In addition, the connection between the valve shaft and the valve body is sealed with graphite packing. This sealing method can effectively prevent the fluid from leaking from the connection between the valve shaft and the valve body. The graphite packing has good temperature resistance, pressure resistance and corrosion resistance, which further enhances the overall sealing of the valve and ensures the reliable operation of the valve under various working conditions. These designs not only improve the sealing performance of the valve, but also simplify the maintenance process and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the overall structure of an electric proportional control valve of the utility model;

[0021] Figure 2 This is a front view of the overall structure of an electric proportional control valve of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of a valve body of an electric proportional control valve of the utility model;

[0023] Figure 4 This is an enlarged view of the structure at point A of an electric proportional control valve of the utility model.

[0024] In the figure: 1. valve body; 2. valve shaft; 3. valve plate body; 31. first valve plate; 32. second valve plate; 4. square bearing seat with seat; 5. electric proportional actuator; 6. valve seat; 7. sealing gasket. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-4 , the utility model provides a technical solution:

[0029] An electric proportional control valve comprises a valve body 1, a valve shaft 2 is movably connected inside the valve body 1, a valve plate body 3 is fixedly connected to the valve shaft 2, and the valve plate body 3 is located inside the valve body 1, a square bearing seat 4 with a seat is fixedly installed on the lower part of the outer surface of the valve body 1, an electric proportional actuator 5 is fixedly installed on the upper part of the outer surface of the valve body 1, and the upper part of the valve shaft 2 is connected to the electric proportional actuator 5.

[0030] In this embodiment, the valve plate body 3 includes a first valve plate 31 and a second valve plate 32, and the valve shaft 2 passes through the center of the first valve plate 31 and the second valve plate 32 and is fixedly connected to the first valve plate 31 and the second valve plate 32; the first valve plate 31 and the second valve plate 32 have the same structure and are distributed front and back.

[0031] Through the above solution: by setting the first valve plate 31 and the second valve plate 32, the design of the double valve plate structure is adopted, which significantly reduces the wear between the valve plate and the valve seat 6. When the valve is closed, the first valve plate 31 and the second valve plate 32 can be separated from the valve seat 6 in time, avoiding unnecessary excessive extrusion, thereby extending the service life of the valve seat and the valve plate. In addition, the double valve plate structure increases the contact area when the valve is closed, making the seal tighter, effectively preventing medium leakage, and improving the reliability and stability of the valve.

[0032] In this embodiment, a sealing gasket 7 is arranged between the first valve plate 31 and the second valve plate 32, and the outer surface of the sealing gasket 7 is in contact with the inner surface of the valve body 1; two valve seats 6 are fixedly connected to the inner surface of the valve body 1, and the two valve seats 6 are symmetrically distributed on the left and right and are respectively located at the front and rear ends of the valve plate body 3; the connection between the valve shaft 2 and the valve body 1 is sealed with a graphite packing; the sealing gasket 7 is made of high-temperature fluororubber.

[0033] Through the above scheme: adopting a double sealing structure, namely soft seal and hard seal, provides multi-level sealing protection, and significantly improves the sealing performance of the valve. The soft seal adopts a high-temperature fluororubber pad 7, which can maintain good sealing performance under high temperature and high pressure conditions and is suitable for various harsh working environments. The hard seal adopts a metal material with high pressure resistance and wear resistance, ensuring that the valve can still maintain a reliable sealing effect during long-term use. In addition, the connection between the valve shaft 2 and the valve body 1 is sealed with a graphite packing 5. This sealing method can effectively prevent the fluid from leaking from the connection between the valve shaft 2 and the valve body 1. The graphite packing has good temperature resistance, pressure resistance and corrosion resistance, further enhancing the overall sealing of the valve and ensuring the reliable operation of the valve under various working conditions.

[0034] It should be noted that the utility model is an electric proportional control valve. During use, when the electric proportional actuator 5 receives a control signal, it drives the valve shaft 2 to rotate. The rotation of the valve shaft 2 drives the valve plate body 3 fixed thereon to move in the valve body 1. The movement of the valve plate body 3 changes the opening of the internal flow channel of the valve body 1, thereby controlling the flow rate and pressure of the fluid. When the valve plate body 3 is closed, the valve plate body 3 is in close contact with the two valve seats 6 in the valve body 1 respectively to form a hard seal. The material of the valve seat 6 is metal with high pressure resistance and wear resistance. The sealing gasket 7 is arranged between the first valve plate 31 and the second valve plate 32. The outer surface of the sealing gasket 7 is in contact with the inner surface of the valve body 1 to form a soft seal. The dual sealing mechanism of hard seal and soft seal effectively solves the problem of gas leakage under high pressure difference conditions and improves the overall sealing performance of the valve. The connection between the valve shaft 2 and the valve body 1 is sealed with graphite packing, which further enhances the sealing between the valve shaft 2 and the valve body 1 and ensures the reliability of the valve in long-term operation.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An electric proportional control valve, comprising a valve body (1), characterized in that: The valve body (1) is movably connected with a valve shaft (2), the valve shaft (2) is fixedly connected with a valve plate body (3), and the valve plate body (3) is located in the valve body (1), a square bearing seat (4) with a seat is fixedly installed on the lower part of the outer surface of the valve body (1), an electric proportional actuator (5) is fixedly installed on the upper part of the outer surface of the valve body (1), and the upper part of the valve shaft (2) is connected to the electric proportional actuator (5); The valve plate body (3) comprises a first valve plate (31) and a second valve plate (32); the valve shaft (2) passes through the center of the first valve plate (31) and the second valve plate (32) and is fixedly connected to the first valve plate (31) and the second valve plate (32); A sealing gasket (7) is provided between the first valve plate (31) and the second valve plate (32), and the outer surface of the sealing gasket (7) is in contact with the inner surface of the valve body (1); The sealing gasket (7) is made of high-temperature fluororubber.

2. The electric proportional control valve according to claim 1, characterized in that: The first valve plate (31) and the second valve plate (32) have the same structure and are distributed front to back.

3. The electric proportional control valve according to claim 1, characterized in that: Two valve seats (6) are fixedly connected to the inner surface of the valve body (1); the two valve seats (6) are symmetrically distributed on the left and right and are respectively located at the front and rear ends of the valve plate body (3).

4. The electric proportional control valve according to claim 1, characterized in that: The connection between the valve shaft (2) and the valve body (1) is sealed with graphite packing.

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