Proportional control valve

Abstract

The proportional control valve comprises a valve body, a valve cover, a servo motor and a valve cone, a first water inlet and a first water outlet are formed in the two ends of the valve body respectively, a supporting block is arranged on the right side of the valve body in a left-upper inclining mode, a cavity is formed in the supporting block, a second water outlet and a second water inlet are formed in the cavity, and the valve cover is arranged on the valve body. A first channel communicated with the first water inlet and the second water outlet is formed in the valve body, a second channel communicated with the first water outlet and the second water inlet is formed in the valve body, the valve deck is installed on the top of the cavity, the valve cone is coaxially installed on the valve deck, the cone end of the valve cone is aligned to the second water inlet, and the valve cone is coaxially installed on the valve deck. A threaded hole is axially formed in the rear end of the valve cone, the servo motor is installed on the valve deck, and an output shaft of the servo motor extends into the threaded hole and is in threaded connection with the valve cone. The proportional control valve is driven by the servo motor, so that the proportional control valve is more intelligent and automatic.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, and particularly relates to a proportional control valve. Background Art

[0002] As a flow control unit, the proportional control valve is widely used in the field of pipeline transportation. Most of the existing proportional control valves include a valve body, a valve core and a driving part. The valve body is provided with a water inlet, a water outlet and a valve cavity. The water inlet and the water outlet are communicated with the valve cavity. The valve core is slidably arranged in the valve cavity and aligned with the water outlet. The driving part is installed on the valve body and connected with the valve core to drive the valve core to move so as to control the opening degree of the water outlet. Among them, the driving part mostly adopts parts such as a cylinder. Although this kind of proportional control valve meets the use requirements to a certain extent, its disadvantage is that the control accuracy is not high, which affects the production effect. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a proportional control valve.

[0004] The technical solution of the utility model is as follows:

[0005] A proportional control valve includes a valve body, a valve cover, a servo motor and a valve cone. The two ends of the valve body are respectively provided with a first water inlet and a first water outlet. A support block is arranged on the right side of the valve body and inclined upward to the left. A cavity is arranged in the support block. A second water outlet and a second water inlet are arranged in the cavity. A first channel for communicating the first water inlet and the second water outlet is arranged in the valve body. A second channel for communicating the first water outlet and the second water inlet is arranged in the valve body. The valve cover is installed on the top of the cavity. The valve cone is coaxially installed on the valve cover, and its tapered end is aligned with the second water inlet. A threaded hole is axially arranged at the rear end of the valve cone. The servo motor is installed on the valve cover, and its output shaft extends into the threaded hole and is in threaded connection with the valve cone.

[0006] Preferably, a convex block is arranged at the lower end of the valve cover. The convex block is embedded in the cavity and forms a columnar water channel with the cavity. Both the second water inlet and the second water outlet are located in the water channel.

[0007] Preferably, the proportional control valve further includes a support disc. A concave platform is formed by the upper end of the valve cover concave downward. The convex block is provided with a first through hole penetrating through the convex block and communicating with the concave platform along the axis of the valve cover. The support disc is provided with a second through hole along its axis. The support disc is placed in the concave platform. The valve cone is placed in the first through hole and the second through hole.

[0008] Preferably, the support disc is fixed in the concave platform by bolts.

[0009] Preferably, the number of the bolts is two, and the two bolts are symmetrically distributed in the concave platform along the first through hole.

[0010] Preferably, the second water inlet is located below the second water outlet.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The output shaft of the servo motor is threadedly connected to the valve cone of the present utility model. By driving the servo motor to rotate, the valve cone moves on the valve cover, so that the conical end of the valve cone presses on or leaves the second water inlet, thereby precisely controlling the flow rate of the second water inlet. The use of a servo motor for driving makes the proportional control valve more intelligent and automated, ensuring the production quality. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the proportional control valve of the present utility model;

[0014] Figure 2 It is a cross-sectional view of the proportional control valve of the present utility model;

[0015] Figure 3 It is an exploded view of the structure of the proportional control valve of the present utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the valve cover of the present utility model;

[0017] Among them, 1 - valve body, 2 - valve cover, 3 - servo motor, 4 - valve cone, 5 - support disc, 6 - bolt, 11 - first water inlet, 12 - first water outlet, 13 - support block, 14 - cavity, 15 - second water outlet, 16 - second water inlet, 17 - first channel, 18 - second channel, 19 - water channel, 21 - convex block, 22 - concave platform, 23 - first through hole, 41 - threaded hole, 51 - second through hole. Detailed Embodiments

[0018] In order to make the purpose, technical solutions and advantages of the present utility model more clear, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] To illustrate the technical solution of the present utility model, the following will be described through specific embodiments.

[0020] Embodiment 1

[0021] As Figures 1 to 4 shown, the proportional control valve of this embodiment includes a valve body 1, a valve cover 2, a servo motor 3 and a valve cone 4. The two ends of the valve body 1 are respectively provided with a first water inlet 11 and a first water outlet 12. The right side of the valve body 1 is inclined upward to the left to be provided with a support block 13. A cavity 14 is provided in the support block 13. A second water outlet 15 and a second water inlet 16 are provided in the cavity 14. A first channel 17 communicating the first water inlet 11 and the second water outlet 15 is provided in the valve body 1. A second channel 18 communicating the first water outlet 12 and the second water inlet 16 is provided in the valve body 1. The valve cover 2 is installed on the top of the cavity 14. The valve cone 4 is coaxially installed on the valve cover 2, and its tapered end is aligned with the second water inlet 16. A threaded hole 41 is axially provided at the rear end of the valve cone 4. The servo motor 3 is installed on the valve cover 2, and its output shaft extends into the threaded hole 41 and is threadedly connected to the valve cone 4. Liquids or gases such as water enter the cavity 14 from the first water inlet 11 through the first channel 17 by the second water outlet 15. The servo motor 3 rotates to drive the valve cone 4 to move on the valve cover 2, so that the tapered end of the valve cone 4 presses on or leaves the second water inlet 16, and the flow rate of the second water inlet 16 is accurately controlled. The water flows out from the second water inlet 16 through the second channel 18 and then through the first water outlet 12. The proportional control valve of this embodiment is driven by a servo motor, making the proportional control valve more intelligent and automated.

[0022] In this embodiment, a convex block 21 is provided at the lower end of the valve cover 2. The convex block 21 is embedded in the cavity 14 and forms a columnar water channel 19 between it and the cavity 14. Both the second water inlet 16 and the second water outlet 15 are located in the water channel 19. By the cooperation of the convex block 21 and the cavity 14, the water is filled and flows out in the water channel 19.

[0023] In this embodiment, the proportional control valve further includes a support disc 5. The upper end of the valve cover 2 is recessed downward to form a concave platform 22. The convex block 21 is provided with a first through hole 23 penetrating the convex block 21 and communicating with the concave platform 22 along the axial direction of the valve cover 2. The support disc 5 is provided with a second through hole 51 along its axis. The support disc 5 is placed in the concave platform 22, and the valve cone 4 is placed in the first through hole 23 and the second through hole 51. The first through hole 23 and the second through hole 51 are used to guide the movement of the valve cone 4 so that it can only move along the axial direction of the valve cover 2. The support disc 5 is fixed in the concave platform 22 by bolts 6, which facilitates the fixing of the support disc 5. The number of the bolts 6 is two, and the two bolts 6 are symmetrically distributed in the concave platform 22 along the first through hole 23. The second water inlet 16 is located below the second water outlet 15, which can ensure the continuity of the water flow.

[0024] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A proportional control valve, characterized in that: The invention comprises a valve body, a valve cover, a servo motor and a valve cone, wherein a first water inlet and a first water outlet are respectively arranged at two ends of the valve body, a support block is arranged on the right side of the valve body inclined toward the upper left, a cavity is arranged in the support block, a second water outlet and a second water inlet are arranged in the cavity, a first channel connecting the first water inlet and the second water outlet is arranged in the valve body, a second channel connecting the first water outlet and the second water inlet is arranged in the valve body, the valve cover is mounted on the top of the cavity, the valve cone is coaxially mounted on the valve cover, the cone end thereof is aligned with the second water inlet, a threaded hole is axially arranged at the rear end of the valve cone, the servo motor is mounted on the valve cover, the output shaft thereof extends into the threaded hole and is threadably connected to the valve cone.

2. The proportional control valve according to claim 1, characterized in that: A convex block is disposed at the lower end of the valve cover, and the convex block is embedded in the cavity to form a columnar water channel with the cavity, and the second water inlet and the second water outlet are both located in the water channel.

3. The proportional control valve according to claim 2, characterized in that: The proportional control valve also includes a supporting disc, the upper end of the valve cover is concave downward to form a concave platform, the protrusion is provided with a first through hole along the axial direction of the valve cover, which passes through the protrusion and is connected to the concave platform, the supporting disc is provided with a second through hole along its axis, the supporting disc is placed in the concave platform, and the valve cone is placed in the first through hole and the second through hole.

4. The proportional control valve according to claim 3, characterized in that: The supporting disc is fixed in the recess by bolts.

5. The proportional control valve according to claim 4, characterized in that: The number of the bolts is two, and the two bolts are symmetrically distributed in the recess along the first through hole.

6. The proportional control valve according to any one of claims 2 to 5, characterized in that: The second water inlet is located below the second water outlet.

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