Servo pressure stabilizing valve

Abstract

The utility model discloses a servo pressure stabilizing valve which comprises an upper cavity, a lower cavity, a coupling, a servo linear motor and a cone valve, the upper cavity is fixed on the lower cavity, a partition plate is arranged between the upper cavity and the lower cavity, the lower cavity is provided with a feeding port, a discharging port and a pressure transmitter port which are communicated with one another, the upper cavity is provided with a backflow port, and the lower cavity is provided with a backflow port. A conical through hole penetrating through the partition plate is formed in the partition plate, the cone valve is installed in the through hole, the servo linear motor is installed at the top of the upper cavity, one end of the coupling shaft is in transmission connection with an output shaft of the servo linear motor, and the other end of the coupling shaft penetrates through the top of the upper cavity, extends into the upper cavity and is in threaded connection with the cone valve. The cone valve is driven by the servo linear motor through the coupling shaft to move up and down on the through hole, and a gap between the cone valve and the through hole is changed, so that the flow of the material returning opening is changed, the pressure in the lower cavity is stabilized, the pressure and the flow of the material discharging opening are stabilized, and a good pressure stabilizing and quantifying effect is achieved; and meanwhile, the cone valve is controlled by the servo linear motor, so that the control precision of the cone valve is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-stabilizing valves, in particular to a servo pressure-stabilizing valve. Background Art

[0002] As a type of valve, the pressure stabilizing valve is mainly used to stabilize the pressure and flow of the fluid at the output end. The existing pressure stabilizing valve includes a main valve, the left and right ends of the main valve are the inlet end and the outlet end respectively, the side of the main valve is provided with a valve cover detachably connected thereto, a hemispherical diaphragm is provided between the valve cover and the main valve, the inner spherical surface of the diaphragm faces the valve cover, the diaphragm is made of elastic material and can undergo elastic deformation; the main valve has a blocking structure inside, the blocking structure includes an arc-shaped blocking surface that fits the outer spherical surface of the diaphragm, and the connection between the inlet end and the outlet end can be blocked by the blocking effect of the blocking structure and the diaphragm; a water inlet cavity is formed between the inlet end, the diaphragm and the blocking structure, a control cavity is formed between the diaphragm and the valve cover, and a water outlet cavity is formed between the diaphragm, the blocking structure and the outlet end; the water inlet cavity and the control cavity are connected through a guide pipe, the guide pipe is connected with a regulating pipe, the regulating pipe is provided with a pressure reducing valve pilot valve, and the regulating pipe is connected with the water outlet cavity. Although the pressure-stabilizing valve can meet the use requirements to a certain extent, its disadvantage is that the diaphragm is used to block the gap between the inlet end and the outlet end, which affects the stability of flow and pressure to a certain extent. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a servo pressure-stabilizing valve.

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

[0005] A servo pressure-stabilizing valve comprises an upper cavity, a lower cavity, a coupling, a servo linear motor and a cone valve, wherein the upper cavity is fixed on the lower cavity, a partition is provided between the upper cavity and the lower cavity, the lower cavity is provided with a feed port, a discharge port and a pressure transmitter port which are interconnected, the upper cavity is provided with a reflux port, a conical through hole penetrating the partition is opened on the partition, the cone valve is installed in the through hole, the servo linear motor is installed on the top of the upper cavity, one end of the coupling is connected to the output shaft of the servo linear motor, and the other end thereof passes through the top of the upper cavity, extends into the upper cavity and is connected to the cone valve.

[0006] Preferably, a connecting shaft is vertically provided on the cone valve, and the connecting shaft is connected to the coupling shaft.

[0007] Preferably, the servo pressure-stabilizing valve further comprises a cover plate, the cover plate is fixed on the top of the upper cavity, the servo linear motor is fixed on the cover plate via a motor bracket, and the other end of the coupling passes through the cover plate and the top of the upper cavity in sequence.

[0008] Preferably, the discharge port and the pressure transmitter port are symmetrically distributed on the lower cavity.

[0009] Preferably, the reflux port is located above and to the side of the discharge port and the pressure transmitter port.

[0010] Preferably, the feed port is located on one side of the discharge port and the pressure transmitter port.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model utilizes a servo linear motor to drive the cone valve to move up and down on the through hole through a coupling, changes the gap between the cone valve and the through hole, thereby changing the flow rate of the return port, thereby stabilizing the pressure in the lower cavity, stabilizing the pressure and flow rate at the discharge port, and achieving a good pressure stabilization and quantitative effect; at the same time, a servo linear motor is used to control the cone valve, so that the control accuracy of the cone valve is higher and the impact speed is faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the servo pressure-stabilizing valve of the utility model;

[0014] Figure 2 It is a cross-sectional view of the servo pressure-stabilizing valve of the utility model;

[0015] Figure 3 This is another cross-sectional view of the servo pressure-stabilizing valve of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0018] Example 1

[0019] like Figures 1 to 3As shown, the servo pressure-stabilizing valve of the utility model includes an upper cavity 1, a lower cavity 2, a coupling 3, a servo linear motor 4 and a cone valve 5, the upper cavity 1 is fixed on the lower cavity 2, a partition 6 is provided between the upper cavity 1 and the lower cavity 2, the lower cavity 2 is provided with a feed port 21, a discharge port 22 and a pressure transmitter port 23 which are interconnected, the upper cavity 1 is provided with a reflux port 11, the partition 6 is provided with a conical through hole 61 which passes through the partition 6, the cone valve 5 is installed in the through hole 61, the servo linear motor 4 is installed on the top of the upper cavity 1, one end of the coupling 3 is connected to the output shaft of the servo linear motor 4, and the other end thereof passes through the top of the upper cavity 1 and extends into the upper cavity 1 and is connected to the cone valve 5. During operation, the material fluid enters the lower cavity 2 from the feed port 21, most of the material fluid flows out from the discharge port 22, and a part of the material fluid enters the upper cavity 1 from the lower cavity 2 through the through hole 61, and then flows back to the material storage through the return port 11. When the pressure transmitter at the pressure transmitter port 23 detects the material fluid pressure in the lower cavity 2, it transmits the data to the PLC, and the PLC controls the servo linear motor 4 to rotate according to the setting. The servo linear motor 4 drives the cone valve 5 to move up and down in the through hole 61 through the coupling 3, changing the gap between the cone valve 5 and the through hole 61, thereby changing the flow rate of the return port 11, achieving the stability of the pressure in the lower cavity 2, and stabilizing the pressure and flow rate of the discharge port 22. The servo pressure-stabilizing valve of this embodiment utilizes a servo linear motor to drive the cone valve to move up and down on the through hole through a coupling, thereby changing the gap between the cone valve and the through hole, thereby changing the flow rate of the return port, thereby stabilizing the pressure in the lower cavity, stabilizing the pressure and flow rate at the discharge port, and achieving a good pressure stabilizing and quantitative effect; at the same time, a servo linear motor is used to control the cone valve, so that the control accuracy of the cone valve is higher and the impact speed is faster.

[0020] In this embodiment, a connecting shaft 51 is vertically provided on the cone valve 3, and the connecting shaft 51 is connected to the coupling 3. The connecting shaft 51 and the cone valve 5 are fixedly connected. Since the coupling 3 and the connecting shaft 51 are connected together, the servo linear motor 4 drives the coupling 3 to move up and down, so that the coupling 3 drives the connecting shaft 51 to move up and down, drives the cone valve 5 to move up and down, and changes the size of the gap between the cone valve 5 and the through hole 61.

[0021] In this embodiment, the servo pressure-stabilizing valve further includes a cover plate 7, which is fixed to the top of the upper cavity 1, and the servo linear motor 4 is fixed to the cover plate 7 through a motor bracket 8. The other end of the coupling 3 passes through the cover plate 7 and the top of the upper cavity 1 in sequence, and is fixed to the servo linear motor 4 by the cover plate 7, so that the overall structure is more solid. The discharge port 22 and the pressure transmitter port 23 are symmetrically distributed on the lower cavity 2, the reflux port 11 is located above the discharge port 22 and the pressure transmitter port 23, and the feed port 21 is located on one side of the discharge port 22 and the pressure transmitter port 23, so that the overall structure distribution is more reasonable.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A servo pressure-stabilizing valve, characterized in that: It includes an upper cavity, a lower cavity, a coupling, a servo linear motor and a cone valve, the upper cavity is fixed on the lower cavity, a partition is provided between the upper cavity and the lower cavity, the lower cavity is provided with a feed port, a discharge port and a pressure transmitter port which are interconnected, the upper cavity is provided with a reflux port, a conical through hole penetrating the partition is opened on the partition, the cone valve is installed in the through hole, the servo linear motor is installed on the top of the upper cavity, one end of the coupling is connected to the output shaft of the servo linear motor, and the other end thereof passes through the top of the upper cavity, extends into the upper cavity and is connected to the cone valve.

2. The servo pressure-stabilizing valve according to claim 1, characterized in that: A connecting shaft is vertically arranged on the cone valve, and the connecting shaft is connected to the coupling shaft.

3. The servo pressure-stabilizing valve according to claim 1, characterized in that: The servo pressure-stabilizing valve also includes a cover plate, which is fixed on the top of the upper cavity. The servo linear motor is fixed on the cover plate through a motor bracket, and the other end of the coupling passes through the cover plate and the top of the upper cavity in sequence.

4. The servo pressure-stabilizing valve according to any one of claims 1 to 3, characterized in that: The material discharge port and the pressure transmitter port are symmetrically distributed on the lower cavity.

5. The servo pressure-stabilizing valve according to any one of claims 1 to 3, characterized in that: The reflux port is located above the discharge port and the pressure transmitter port.

6. The servo pressure-stabilizing valve according to any one of claims 1 to 3, characterized in that: The feed port is located on one side of the discharge port and the pressure transmitter port.

Images