CN221278526U - Compact type precise electric proportional valve - Google Patents

Abstract

The utility model discloses a compact precise electric proportional valve, which comprises: the valve body shell, electric control module, diaphragm subassembly, valve rod and liquid crystal display, be equipped with electric control module, diaphragm subassembly and valve rod in the valve body shell, be equipped with the liquid crystal display on the valve body shell, electric control module contains diaphragm pressurization solenoid valve, diaphragm decompression solenoid valve and pressure sensor, and the valve body shell is located and is equipped with the protruding air cock of cross directly over the valve rod. According to the utility model, the cross-shaped bulge air tap is arranged right above the valve rod in the middle of the lower shell, after the exhaust sealing gasket is tightly pressed against the valve rod, the diaphragm component overcomes the elastic force of the rubber elastic gasket to continuously move downwards, the valve rod is separated from the cross-shaped bulge air tap, the passage from the pressure input port and the cross-shaped bulge air tap to the pressure output port is realized, the valve body air path design is simpler, and the valve body processing is more convenient.

Description

Compact type precise electric proportional valve

Technical Field

The utility model relates to the technical field of valves, in particular to a compact precise electric proportional valve.

Background

The electric proportional valve adjusts the cross-sectional area of the valve core according to the magnitude of the control signal. Thereby achieving the process target and the requirement of adjusting the pressure.

The electric proportional valve controls output pressure, when preset pressure is reached, the rear end has constant use flow (20L/min is assumed), at the moment, the diaphragm pushes the valve rod to open the valve port, the valve port opening flow is kept equal to the rear end use flow (20L/min), at the moment, the air outlet air pressure is unchanged, when the rear end use flow instantaneously changes (10L/min is assumed to be reduced), because the valve port opening flow is 20L/min, at the moment, the air pressure in the pipeline begins to rise, the pressure of the lower cavity of the diaphragm also rises at the same time, the diaphragm is out of balance and starts to move upwards, meanwhile, the pressure sensor detects that the pressure exceeds a set range, the diaphragm pressure reducing valve is opened, the diaphragm is accelerated to move upwards until the valve port opening flow is reduced to 10L/min, the pressure reaches the set range, the diaphragm pressure reducing valve is closed, and the diaphragm is in a balanced state again.

The main bayonet of the gas circuit of the existing electric proportional valve is arranged on the valve rod, and is matched with the opening of the valve seat, so that the gas circuit is smooth or closed when the valve rod is lifted, and the machining difficulty is high due to the mode.

Therefore, we propose a compact precision electric proportional valve in order to solve the problems set forth above.

Disclosure of utility model

The utility model aims to provide a compact precise electric proportional valve, which solves the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a compact precision electrical proportioning valve comprising: the valve comprises a valve body shell, an electric control module, a diaphragm assembly, a valve rod and a liquid crystal display screen, wherein the electric control module, the diaphragm assembly and the valve rod are arranged in the valve body shell, the liquid crystal display screen is arranged on the valve body shell, and the electric control module comprises a diaphragm pressurizing electromagnetic valve, a diaphragm depressurizing electromagnetic valve and a pressure sensor;

the diaphragm pressurizing electromagnetic valve and the diaphragm depressurizing electromagnetic valve pressurize or depressurize the diaphragm assembly

The diaphragm assembly comprises an upper cover plate, a diaphragm main body and an exhaust sealing gasket, wherein the upper cover plate and the exhaust sealing gasket clamp the diaphragm main body through bolts, and the valve body shell at the edge of the diaphragm main body is clamped;

Two circular ring bulges are integrally arranged on the lower surface of the diaphragm main body, and the diaphragm main body is bent downwards to form a corrugated structure;

the valve body shell is provided with a cross bulge air tap right above the valve rod.

Preferably, the valve body shell is divided into a lower shell, a fixed layer plate and an upper shell, and the lower shell and the upper shell are fixed on the upper surface and the lower surface of the fixed layer plate through bolts.

Preferably, the fixed laminate is further divided into a lower laminate and an upper laminate, wherein a cavity is formed between the upper laminate and the upper shell, an electric control module and a liquid crystal display screen are arranged in the cavity, a cavity is formed between the lower laminate and the lower shell, a diaphragm assembly and a valve rod are arranged in the cavity, and a diaphragm upper cavity exhaust port is formed in the upper laminate and the upper shell in a penetrating manner.

Preferably, a display window is arranged on the upper shell, the display window is used for setting a liquid crystal display, a power signal integrated terminal and a control key are also arranged on the upper shell, the power signal integrated terminal is electrically connected with the electric control module, and the control key is in control connection with the electric control module.

Preferably, the electronic control module further comprises a control circuit board, and the control circuit board is electrically connected with the diaphragm pressurizing electromagnetic valve, the diaphragm depressurizing electromagnetic valve and the pressure sensor.

Preferably, the valve body shell is provided with a pressure input port and a pressure output port at the left and right sides respectively.

Preferably, the lower end of the valve rod is sleeved with a plug, the plug is in sealing connection with the lower shell, and a rubber elastic pad is arranged on the contact surface between the plug and the valve rod.

Compared with the prior art, the utility model has the beneficial effects that:

the middle of the lower shell is provided with the cross-shaped bulge air tap right above the valve rod, after the exhaust sealing gasket tightly presses the valve rod, the diaphragm component overcomes the elasticity of the rubber elastic gasket to continuously move downwards, the valve rod is separated from the cross-shaped bulge air tap, the passage from the pressure input port and the cross-shaped bulge air tap to the pressure output port is realized, the valve body air path is simpler in design, and the valve body is more convenient to process.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a schematic diagram of a diaphragm assembly according to the present utility model;

FIG. 4 is a schematic diagram of the coordination of the electronic control module of the present utility model;

fig. 5 is a cross-sectional view of the lower housing of the present utility model.

In the figure: 1. a valve body housing; 11. a lower housing; 111. a pressure input port; 112. a pressure outlet; 113. cross convex air tap; 12. fixing the laminate; 121. a lower plate; 1211. an exhaust port of the upper cavity of the diaphragm; 122. an upper plate; 13. an upper housing; 131. displaying a window; 132. a power signal integration terminal; 133. a control key; 2. an electric control module; 21. a diaphragm pressurizing solenoid valve; 22. a diaphragm pressure reducing solenoid valve; 23. a control circuit board; 24. a pressure sensor; 3. a diaphragm assembly; 31. an upper cover plate; 32. a diaphragm body; 321. a circular ring bulge; 322. a corrugated structure; 33. an exhaust gasket; 5. a valve stem; 6. a plug; 7. a liquid crystal display.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution: a compact precision electrical proportioning valve comprising: the valve body shell 1, the electric control module 2, the diaphragm assembly 3, the valve rod 5 and the liquid crystal display 7, wherein the valve body shell 1 is divided into a lower shell 11, a fixed layer plate 12 and an upper shell 13, and the lower shell 11 and the upper shell 13 are fixed on the upper surface and the lower surface of the fixed layer plate 12 through bolts;

The fixed layer plate 12 is divided into a lower layer plate 121 and an upper layer plate 122, wherein a cavity is formed between the upper layer plate 122 and the upper shell 13, an electric control module 2 and a liquid crystal display 7 are arranged in the cavity, a cavity is formed between the lower layer plate 121 and the lower shell 11, a diaphragm assembly 3 and a valve rod 5 are arranged in the cavity, and a diaphragm upper cavity exhaust port 1211 is formed in the upper layer plate 122 and the upper shell 13 in a penetrating manner;

Specifically, the upper shell 13 is provided with a display window 131, the display window 131 is used for setting the liquid crystal display 7, meanwhile, the upper shell 13 is also provided with a power signal integrated terminal 132 and a control key 133, the power signal integrated terminal 132 is in electric control connection with the electric control module 2, and the control key 133 is in control connection with the electric control module 2;

The electronic control module 2 comprises a control circuit board 23, a diaphragm pressurizing electromagnetic valve 21, a diaphragm depressurizing electromagnetic valve 22 and a pressure sensor 24, wherein the control circuit board 23 is electrically connected with the diaphragm pressurizing electromagnetic valve 21, the diaphragm depressurizing electromagnetic valve 22 and the pressure sensor 24;

the diaphragm assembly 3 comprises an upper cover plate 31, a diaphragm main body 32 and an exhaust sealing gasket 33, the upper cover plate 31 and the exhaust sealing gasket 33 clamp the diaphragm main body 32 through bolts, the edge of the diaphragm main body 32 is clamped by a lower layer plate 121 and a lower shell 11, an upper cavity is formed between the diaphragm assembly 3 and the lower layer plate 121, a lower cavity is formed between the diaphragm assembly 3 and the lower shell 11, a travel space of the diaphragm assembly 3 is provided by the upper cavity and the lower cavity, the pressure sensor 24 senses the pressure of the upper cavity in real time, and the diaphragm pressurizing electromagnetic valve 21 and the diaphragm depressurizing electromagnetic valve 22 regulate and control the pressure of the upper cavity in real time;

The lower surface of the diaphragm main body 32 is integrally provided with two circular ring protrusions 321, and the diaphragm main body 32 is downwards bent to form a corrugated structure 322;

The left and right of the lower shell 11 are respectively provided with a pressure input port 111 and a pressure output port 112;

The valve rod 5 is arranged in the lower shell 11 in a sliding manner, the plug 6 is sleeved at the lower end of the valve rod 5, the plug 6 is in sealing connection with the lower shell 11, a rubber elastic pad is arranged on the contact surface between the plug 6 and the valve rod 5, and the rubber elastic pad pushes the valve rod 5 to keep the sealing of an air inlet valve port of the lower shell 11;

The middle of the lower shell 11 is positioned right above the valve rod 5 and is provided with a cross bulge air tap 113.

Working principle: in the initial state, the air inlet valve rod 5 is tightly pressed on the air inlet valve port by the rubber elastic cushion, the sealing state is kept, when the input pressure is increased, the air pressure is tightly pressed on the periphery of the rubber elastic cushion, the auxiliary supporting effect is achieved, the elastic force of the rubber elastic cushion is stronger, so the valve port sealing force of the valve rod 5 is larger, the diaphragm assembly 3 has no pressure in the upper cavity, the lower cavity is communicated with the pressure output port 112, the pressure output port 112 only has residual pressure slightly higher than that in the upper cavity, the diaphragm assembly 3 moves upwards, the exhaust sealing cushion 33 is separated from the exhaust port above the valve rod 5 to form an exhaust effect, in this state, the air inlet is closed, the exhaust port is opened, and the pressure output port 112 has no pressure output;

In the working state, after the input signal end inputs a preset pressure signal or manually presses the control button 133 to set a preset pressure, the electronic control module 2 starts to collect the pressure value of the pressure output port 112 in real time, when the collected pressure signal is lower than the preset value, the electronic control module 2 controls the diaphragm pressurizing electromagnetic valve 21 to be opened, the air source pressure is conveyed to the upper part of the diaphragm main body 32 through the air outlet 1211 of the upper cavity of the diaphragm, the diaphragm assembly 3 starts to move downwards, after the exhaust sealing gasket 33 is tightly pressed against the valve rod 5, the diaphragm assembly 3 overcomes the elastic force of the rubber elastic gasket to continue to move downwards, the valve rod 5 is separated from the cross-shaped bulge air tap 113, the passage from the pressure input port 111 and the cross-shaped bulge air tap 113 to the pressure output port 112 is realized, the pressure of the pressure output port 112 starts to rise, and when the pressure of the pressure output port 112 reaches the preset pressure value, the electronic control module 2 closes the diaphragm pressurizing electromagnetic valve 21, and the preset pressure reaches the specified requirement.

What is not described in detail in this specification is prior art known to those skilled in the art.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A compact precision electrical proportioning valve comprising: valve body shell (1), electric control module (2), diaphragm subassembly (3), valve rod (5) and liquid crystal display (7), be equipped with electric control module (2), diaphragm subassembly (3) and valve rod (5), its characterized in that in valve body shell (1): a liquid crystal display screen (7) is arranged on the valve body shell (1), and the electronic control module (2) comprises a diaphragm pressurizing electromagnetic valve (21), a diaphragm depressurizing electromagnetic valve (22) and a pressure sensor (24);

the diaphragm pressurizing electromagnetic valve (21) and the diaphragm depressurizing electromagnetic valve (22) pressurize or depressurize the diaphragm assembly (3)

The diaphragm assembly (3) comprises an upper cover plate (31), a diaphragm main body (32) and an exhaust sealing gasket (33), wherein the upper cover plate (31) and the exhaust sealing gasket (33) clamp the diaphragm main body (32) through bolts, and the valve body shell (1) at the edge of the diaphragm main body (32) is clamped;

two circular ring bulges (321) are integrally arranged on the lower surface of the diaphragm main body (32), and the diaphragm main body (32) is downwards bent to form a corrugated structure (322);

The valve body shell (1) is arranged right above the valve rod (5) and is provided with a cross-shaped bulge air tap (113).

2. The compact precision electric proportional valve according to claim 1, wherein the valve body housing (1) is divided into a lower case (11), a fixing plate (12) and an upper case (13), and the lower case (11) and the upper case (13) are fixed on the upper and lower surfaces of the fixing plate (12) by bolts.

3. The compact precision electric proportional valve according to claim 2, wherein the fixed layer plate (12) is further divided into a lower layer plate (121) and an upper layer plate (122), wherein a cavity is formed between the upper layer plate (122) and the upper shell (13), an electric control module (2) and a liquid crystal display screen (7) are arranged in the cavity, a cavity is formed between the lower layer plate (121) and the lower shell (11), a diaphragm assembly (3) and a valve rod (5) are arranged in the cavity, and a diaphragm upper cavity exhaust port (1211) is formed in the upper layer plate (122) and the upper shell (13) in a penetrating manner.

4. A compact precision electric proportional valve according to claim 3, characterized in that the upper housing (13) is provided with a display window (131), the display window (131) is used for setting a liquid crystal display (7), the upper housing (13) is also provided with a power signal integration terminal (132) and a control key (133), the power signal integration terminal (132) is electrically connected with the electric control module (2), and the control key (133) is in control connection with the electric control module (2).

5. The compact precision electrical proportioning valve as set forth in claim 4, wherein said electrical control module (2) further comprises a control circuit board (23), said control circuit board (23) electrically connecting a diaphragm pressurization solenoid valve (21), a diaphragm depressurization solenoid valve (22) and a pressure sensor (24).

6. The compact precision electric proportional valve according to claim 1, wherein the valve body housing (1) is provided with a pressure input port (111) and a pressure output port (112) on the left and right sides, respectively.

7. The compact precise electric proportional valve according to claim 1, wherein a plug (6) is sleeved at the lower end of the valve rod (5), the plug (6) is in sealing connection with the lower shell (11), and a rubber elastic pad is arranged on the contact surface between the plug (6) and the valve rod (5).