Electric control valve

Abstract

An electric control valve comprises a valve body (1), a valve rod (2) and an electric actuator (3), the valve rod (2) is movably installed in the valve body (1) in a sealed mode, a valve clack (4) is arranged at the end of the valve rod (2), and the electric actuator (3) drives the valve rod (2) to ascend or descend. The valve has the advantages that the sealing performance is good, scales at the valve clack can be cleaned regularly, the valve is driven to be opened and closed through the electric actuator, and the labor intensity of workers is relieved.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to an electric regulating valve. Background Art

[0002] At present, in fertilizer production lines, manual valve opening and closing is mostly used to adjust the slurry spraying volume, which requires a lot of skilled workers and has high labor intensity, directly affecting product quality and easily causing safety accidents such as steam slurry scalding. Existing regulating valves are prone to scaling and poor sealing after long-term use. There is a lack of regulating valves that can regularly clean scaling and have good sealing performance. Utility Model Content

[0003] The purpose of the utility model is to provide an electric regulating valve to solve the above-mentioned shortcomings.

[0004] The utility model comprises a valve body, a valve stem and an electric actuator. The valve stem is movably sealed and installed in the valve body. A valve disc is arranged at the end of the valve stem. The valve stem is driven to rise or fall by the electric actuator.

[0005] A valve seat is provided in the valve body, a sealing ring is provided on the valve seat, an annular sealing protrusion for pressing the sealing ring is provided at the bottom end of the valve disc, a hemispherical sealing protrusion is provided at the center of the bottom of the valve disc, an arc-shaped sealing surface is provided on the inner wall of the valve seat, the hemispherical sealing protrusion extends into the valve seat, and the outer wall of the hemispherical sealing protrusion is tightly fitted with the arc-shaped sealing surface.

[0006] A flushing pipeline is arranged at the bottom of the valve body, a stop valve is arranged on the flushing pipeline, the flushing pipeline is communicated with the inner cavity of the valve body, and the outlet end of the flushing pipeline faces the hemispherical sealing protrusion.

[0007] An L-shaped sampling pipeline is arranged on the flushing pipeline, and a sampling valve is arranged on the L-shaped sampling pipeline.

[0008] A sealing installation groove is provided on the valve seat, and a sealing ring is installed in the sealing installation groove.

[0009] The power output shaft of the electric actuator is connected to the top of the valve stem through a coupling.

[0010] The valve body is composed of a valve body and a valve cover. The valve cover is sealed with the top flange of the valve body, and the valve stem is installed in the valve cover through a packing seal.

[0011] A reinforcing rib is arranged between the outer wall of the inlet end of the valve body and the valve stem accommodating portion, and a reinforcing rib is arranged between the outer wall of the discharge end of the valve body and the outer wall of the shell below the valve seat.

[0012] The outer wall of the valve body is covered with a ceramic fiber wool heat insulation sleeve.

[0013] The advantages of the present utility model are as follows: good sealing performance, the ability to regularly clean the scale at the valve flap, driving the opening and closing of the valve through an electric actuator, and reducing the labor intensity of the staff. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure diagram of the present utility model.

[0015] Figure 2 It is a schematic structure diagram of the valve flap of the present utility model. Detailed Implementation Modes

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0018] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0020] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it 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 indirectly connected 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.

[0021] As shown in the accompanying drawings, the utility model comprises a valve body 1, a valve stem 2 and an electric actuator 3. The valve stem 2 is movably sealed and installed in the valve body 1. A valve flap 4 is provided at the end of the valve stem 2. The valve stem 2 is raised or lowered by the electric actuator 3.

[0022] A valve seat 5 is provided in the valve body 1, a sealing ring 6 is provided on the valve seat 5, an annular sealing protrusion for pressing the sealing ring 6 is provided at the bottom end of the valve disc 4, a hemispherical sealing protrusion 7 is provided at the center of the bottom of the valve disc 4, an arc-shaped sealing surface is provided on the inner wall of the valve seat 5, the hemispherical sealing protrusion 7 extends into the valve seat 5, and the outer wall of the hemispherical sealing protrusion 7 is tightly fitted with the arc-shaped sealing surface. When the hemispherical sealing protrusion 7 extends into the valve seat 5, it plays a guiding role, and there will be no dislocation even after long-term use.

[0023] A flushing pipe 8 is provided at the bottom of the valve body 1 , a stop valve is provided on the flushing pipe 8 , the flushing pipe 8 is connected to the inner cavity of the valve body 1 , and the outlet end of the flushing pipe 8 faces the hemispherical sealing protrusion 7 .

[0024] An L-shaped sampling pipe 9 is arranged on the flushing pipe 8, and a sampling valve is arranged on the L-shaped sampling pipe 9.

[0025] A sealing installation groove is formed on the valve seat 5, and a sealing ring 6 is installed in the sealing installation groove.

[0026] The power output shaft of the electric actuator 3 is connected to the top of the valve stem 2 through a coupling.

[0027] The valve body 1 is composed of a valve body and a valve cover. The valve cover is sealed with a flange on the top of the valve body, and a valve stem 2 is installed in the valve cover through a packing seal.

[0028] A reinforcing rib is provided between the outer wall of the inlet end of the valve body 1 and the valve stem accommodating portion, and a reinforcing rib is provided between the outer wall of the discharge end of the valve body 1 and the outer wall of the shell below the valve seat 5. This makes the strength of the valve body 1 higher.

[0029] The outer wall of the valve body 1 is covered with a ceramic fiber wool heat insulation sleeve, which isolates the temperature emitted by the high-temperature medium in the valve body 1.

[0030] Embodiment 1: Connect the inlet end and the outlet end of the valve body 1 to the pipeline flanges respectively. When adjusting the flow rate, the electric actuator drives the valve stem 2 to rotate, so that the valve flap 4 is opened or closed. When the valve flap 4 is closed, the hemispherical sealing projection 7 is inserted into the channel of the valve seat 5. After the outer wall of the hemispherical sealing projection 7 is closely attached to the arc-shaped sealing surface, the first seal is formed. At the same time, the annular sealing projection is pressed against the sealing ring 6 to form the second seal. The double seals make the sealing more tight. When it is necessary to flush the sealing surface of the valve seat 5, connect the high-pressure cleaning pipeline to the flushing pipeline 8, open the stop valve, send the high-pressure flushing medium into the valve body 1, and flush the sealing surface of the valve seat 5. After flushing, close the stop valve. When it is necessary to sample the medium in the valve body 1, open the sampling valve on the L-shaped sampling pipeline 9, and the medium in the valve body 1 flows out through the L-shaped sampling pipeline 9 for sampling.

Claims

1. An electric regulating valve, comprising a valve body (1), a valve stem (2) and an electric actuator (3), wherein the valve stem (2) is movably and hermetically mounted in the valve body (1), a valve flap (4) is disposed at the end of the valve stem (2), and the valve stem (2) is raised or lowered by the electric actuator (3). Features A valve seat (5) is arranged in the valve body (1), a sealing ring (6) is arranged on the valve seat (5), an annular sealing protrusion for pressing the sealing ring (6) is arranged at the bottom end of the valve disc (4), a hemispherical sealing protrusion (7) is arranged at the bottom center of the valve disc (4), an arc-shaped sealing surface is arranged on the inner wall of the valve seat (5), the hemispherical sealing protrusion (7) extends into the valve seat (5), and the outer wall of the hemispherical sealing protrusion (7) is tightly fitted with the arc-shaped sealing surface.

2. The electric regulating valve according to claim 1, characterized in that: A flushing pipe (8) is arranged at the bottom of the valve body (1), a stop valve is arranged on the flushing pipe (8), the flushing pipe (8) is connected to the inner cavity of the valve body (1), and the outlet end of the flushing pipe (8) faces the hemispherical sealing protrusion (7).

3. An electric regulating valve according to claim 2, characterized in that: An L-shaped sampling pipeline (9) is arranged on the flushing pipeline (8), and a sampling valve is arranged on the L-shaped sampling pipeline (9).

4. The electric regulating valve according to claim 1, characterized in that: A sealing installation groove is formed on the valve seat (5), and a sealing ring (6) is installed in the sealing installation groove.

5. The electric regulating valve according to claim 1, characterized in that: The power output shaft of the electric actuator (3) is connected to the top of the valve stem (2) through a coupling.

6. The electric regulating valve according to claim 1, characterized in that: The valve body (1) is composed of a valve body and a valve cover. The valve cover is sealed with a flange on the top of the valve body. The valve stem (2) is installed in the valve cover through a packing seal.

7. The electric regulating valve according to claim 1, characterized in that: A reinforcing rib is provided between the outer wall of the inlet end of the valve body (1) and the valve stem accommodating portion, and a reinforcing rib is provided between the outer wall of the discharge end of the valve body (1) and the outer wall of the shell below the valve seat (5).

8. The electric regulating valve according to claim 1, characterized in that: The outer wall of the valve body (1) is covered with a ceramic fiber wool heat insulation sleeve.

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