CN111677925B - A vacuum electronically controlled proportional valve - Google Patents

Abstract

The invention discloses a vacuum electric control proportional valve, which is composed of a valve seat combined with a guide seat, wherein a vacuum solenoid valve, an atmosphere solenoid valve and a sensor are connected above the guide seat, a main diaphragm is clamped between the guide seat and the valve seat to form a vacuum pressure cavity, a pilot exhaust straight rod provided with a vacuum valve set is embedded in the center of the main diaphragm, a main channel for communicating a primary pressure and a secondary pressure is arranged between the valve seat and the guide seat, the main channel is also provided with a guide channel and a feedback channel, an adjusting channel for controlling a switch by the vacuum solenoid valve and the atmosphere solenoid valve is additionally arranged above the vacuum pressure cavity, a pilot atmosphere channel for communicating atmospheric pressure is arranged in the valve seat and communicated to the space below the main diaphragm, and a first vacuum breaking valve is arranged above the valve seat, and a second vacuum breaking valve is arranged above the vacuum valve group and on the guide exhaust straight rod.

Description

A vacuum electronically controlled proportional valve

technical field

The invention relates to a vacuum electric control proportional valve. Through the pilot exhaust straight rod and the vacuum valve group arranged inside, the pilot atmospheric channel is further cooperated to introduce atmospheric pressure, so that the pilot exhaust straight rod can adjust the vacuum strength in two stages, so that the vacuum strength can be adjusted in two stages. It can achieve the purpose of energy saving and precise adjustment.

Background technique

Please refer to Figure 11 for the vacuum electronically controlled proportional valve widely used in the field of automation equipment. It usually has a conventional setting hole (91) for adsorption objects, a conventional vacuum hole (92) for connecting a vacuum pump, and a conventional large valve for adjusting the vacuum pressure. When the air hole (93) is usually operated by a vacuum pump, the pressure of the conventional setting hole (91) and the fluid flow to the conventional vacuum hole (92) are drawn through the internal passage of the vacuum electric proportional valve to form a vacuum, as indicated by the arrow in the figure.

During the testing process of the vacuum electric proportional valve, the operator needs to go through a long period of accumulated experience and repeated tests to manufacture a good vacuum electric proportional valve, but the circuit in the vacuum electric proportional valve structure is also relatively complicated. The vacuum pressure pipeline and the equipment for testing need to be connected at a 90-degree angle. For the test operator, if the vacuum pressure pipeline and the equipment cannot be connected by a straight-in and straight-out assembly method for testing, it will cost a lot of money. more time and energy.

At present, if the internal circuit of the conventional vacuum electric proportional valve needs to be modified for the internal air pressure circuit, it will take a lot of time and money to improve it. Although it can change the way of connecting the external vacuum air pressure pipeline, there are still various parts. The coordination also needs to be tested one by one. If it is necessary to maintain the fine level of the original vacuum control, it is necessary to redesign the relevant vacuum control parts; therefore, there are still many areas for improvement.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vacuum electronically controlled proportional valve to solve the technical problems in the prior art, which can utilize the first vacuum breaking valve set in the valve seat by the pilot exhaust straight rod and cooperate with the vacuum valve group. The second vacuum breaking valve can reduce the complicated circuit of the internal structure of the vacuum electric proportional valve, and can precisely adjust the strength and shortening of the vacuum pressure through the opening and closing of the first vacuum breaking valve and the second vacuum breaking valve. its reaction time.

The invention provides a vacuum electronically controlled proportional valve, which consists of: a main diaphragm is arranged above a valve seat, and a vacuum pressure chamber is formed by sandwiching the main diaphragm by a combined guide seat, and a vacuum pressure chamber is formed above the main diaphragm. There is an elastic component, and a pilot exhaust straight rod is embedded in the center of the main diaphragm. The pilot exhaust straight rod is also equipped with a vacuum valve group, and a vacuum pressure solenoid valve, an atmospheric pressure solenoid valve and The sensor, and another adjustment channel is connected to the top of the vacuum pressure chamber, and is controlled by a vacuum pressure solenoid valve and an atmospheric pressure solenoid valve, and a pilot atmospheric channel is set in the valve seat and communicated to the space below the main diaphragm for atmospheric pressure flow. , and another main channel is set between the valve seat and the guide seat, this main channel can be used for the primary side pressure and the secondary side pressure flow, and the main channel is also provided with a guide channel controlled by a vacuum piezoelectric valve and Connect a feedback channel of this sensor.

The pilot exhaust straight rod is provided with a first vacuum valve above the valve seat, and a second vacuum valve is provided above the vacuum valve group and the pilot exhaust straight rod. When the primary side pressure passes through the guide channel, the vacuum pressure solenoid valve operates , through the adjustment channel to the vacuum pressure chamber to generate a vacuum pressure, so that the main diaphragm moves up the pilot exhaust straight rod, and then drives the main valve located below the vacuum valve group to open, so that the primary side pressure passes through the main valve to form the secondary side The pressure is used to achieve the purpose of vacuum adsorption until the main diaphragm is displaced downward and returns to the horizontal position, and the pilot exhaust straight rod is linked to make the main valve closed and stabilized.

The atmospheric pressure solenoid valve is opened and the external atmospheric pressure is introduced through the adjustment channel, which can press the main diaphragm to move downward, so that the first vacuum breaking valve is in an open state, allowing the atmospheric pressure part to pass through to reduce the strength of vacuum adsorption. When the atmospheric pressure solenoid valve is introduced into the atmospheric pressure for continuous input, the second vacuum breaking valve will be opened, so that the atmospheric pressure can pass more, which can shorten the reaction time of reducing the vacuum adsorption, so that it can achieve the purpose of energy saving and precise adjustment.

Description of drawings

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a perspective view of another perspective of the present invention.

FIG. 3 is a schematic diagram of the circuit of the present invention.

FIG. 4 is a schematic structural diagram of the present invention in a ready state.

FIG. 5 is a schematic structural diagram of the present invention in a working state.

FIG. 6 is a schematic structural diagram of the present invention in a voltage-stabilizing state.

FIG. 7 is a schematic structural diagram of the present invention in the first stage of breaking the vacuum state.

FIG. 8 is a partial enlarged schematic view of FIG. 7 of the present invention.

FIG. 9 is a schematic structural diagram of the present invention in the state of breaking the vacuum in the second stage.

FIG. 10 is a partial enlarged schematic view of FIG. 9 of the present invention.

Figure 11 is a schematic diagram of a conventional structure.

Description of reference numbers:

(10)...Valve seat

(101)...guide channel

(102)...feedback channel

(11)...Main diaphragm

(111)...elastic components

(12)...vacuum pressure chamber

(121)...Adjust channel

(122)...Pilot atmospheric passage

(123)...Atmospheric channel

(20)...Pilot Exhaust Straight Rod

(201)...first vacuum break valve

(202)...Second vacuum break valve

(203)...Main valve

(204)...Limiting bump

(21)...Vacuum valve group

(22)...Convex

(23)...spring

(30)...Guide seat

(31)...Vacuum pressure solenoid valve

(32)...Atmospheric pressure solenoid valve

(321)...Air port

(33)...Sensor

(40)...Main channel

(P)...Control loop

(PR)...Power

(PI)...input signal

(PS)...Pressure representation

(PO)...output signal

(PP)...atmospheric pressure

(PT)...vacuum pressure

(P1)...Primary side pressure

(P2)...Secondary side pressure

(A)...large pores

(O)...Set hole

(V)...Vacuum hole

(91)...Regular setting hole

(92)...Conventional vacuum hole

(93)...Conventional large pores.

Detailed ways

The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

The invention discloses a vacuum electronically controlled proportional valve. The structure comprises: a valve seat 10, a guide seat 30 is combined above it, and a main diaphragm 11 is sandwiched between the guide seat 30 and the valve seat 10 to form a vacuum pressure In the cavity 12, an elastic component 111 is arranged above the main diaphragm 11. The elastic component 111 is a kind of spring, and a pilot exhaust straight rod 20 is embedded in the center of the main diaphragm 11. This pilot exhaust straight rod 20 is more suitable for A vacuum valve group 21 is provided. The vacuum valve group 21 is composed of two convex parts 22 with a convex surface opposite to a spring 23. The convex part 22 has a through design inside, which can be used for the pilot exhaust straight rod 20. Wherein, the pilot exhaust straight rod 20 is provided with a limit protrusion 204 at the upper and lower sides of the side edge, so as to limit the stroke of the pilot exhaust straight rod 20 in the up and down displacement.

A vacuum pressure solenoid valve 31 , an atmospheric pressure solenoid valve 32 , and a sensor 33 are further connected above the guide seat 30 , and an adjustment channel 121 is connected to the top of the vacuum pressure chamber 12 , and is connected to the vacuum pressure solenoid valve 31 through the vacuum pressure solenoid valve 31 , and a sensor 33 . The atmospheric pressure solenoid valve 32 performs on-off control.

A pilot atmosphere channel 122 is provided in the valve seat 10 and communicated with the space below the main diaphragm 11, thereby allowing an atmospheric pressure PP to circulate; and a main channel 40 is provided between the valve seat 10 and the guide seat 30, the The main channel 40 can be used for the primary side pressure P1 and the secondary side pressure P2 to flow together, and the main channel 40 is further provided with a guide channel 101 controlled by the vacuum pressure solenoid valve 31 and a feedback channel 102 connected to the sensor 33 .

The pilot exhaust straight rod 20 is provided with a first vacuum break valve 201 above the valve seat 10 , and a second vacuum break valve 202 is further provided above the vacuum valve group 21 and the pilot exhaust straight rod 20 . P1 cooperates with the vacuum pressure solenoid valve 31 to operate through the guide channel 101, and a vacuum pressure PT is generated in the vacuum pressure chamber 12 through the adjustment channel 121, so that the main diaphragm 11 is moved upward and the pilot exhaust rod 20 is connected, thereby driving the vacuum valve group 21 A main valve 203 located below is opened, so that the primary side pressure P1 passes through the main valve 203 to form a secondary side pressure P2, which is used to achieve the purpose of vacuum adsorption, until the main diaphragm 11 is displaced downward and returns to the horizontal position, and the linkage The pilot exhaust straight rod 20 closes the main valve 203 and is in a stable state.

When the atmospheric pressure solenoid valve 32 is opened and the adjustment channel 121 presses the main diaphragm 11 to move downward, the atmospheric pressure PP passes through the pilot atmospheric channel 122 to the first vacuum breaking valve 201 to open, allowing the atmospheric pressure PP to partially pass through. It is used to reduce the strength of vacuum adsorption, and when the atmospheric pressure PP is continuously input, the second vacuum breaking valve 202 will be opened to allow more atmospheric pressure PP to pass through, which can shorten the reaction time of reducing vacuum adsorption.

Please refer to FIG. 1-2 , you can see the connection ends provided by the valve seat 10, which are respectively used for a setting hole O for adsorbing the object, a vacuum hole V for connecting the vacuum pump, and an air hole A for adjusting the atmospheric pressure, through the internal structure The design allows the test pipeline to be connected, and then go straight from the setting hole O to the vacuum hole V straight out. It does not need to be tested in a special way of turning 90 degrees with the conventional structure, so that the inconvenience of tedious repeated testing work can be obtained. improve.

3-4, it can be seen that the vacuum pressure solenoid valve 31, the atmospheric pressure solenoid valve 32, and the sensor 33 are mainly driven by the power supply PR through a control circuit P, and after the input signal P I and the output signal PO are set, the control The display related pressure of the circuit P represents PS, to drive the vacuum pressure solenoid valve 31 and the atmospheric pressure solenoid valve 32, and the sensor 33 is mainly used to detect the pressure of the secondary side pressure P2, when it exceeds or is lower than the secondary side pressure P2 is set It is used to feed back information to the control loop P to discriminate between the vacuum pressure solenoid valve 31 and the atmospheric pressure solenoid valve 32, and to drive subsequent related control actions through the control loop P. This part of the control is a commonly used method, so it is no longer necessary. to repeat.

4 is the preparation state of the present invention, it can be seen that the vacuum pressure solenoid valve 31 and the atmospheric pressure solenoid valve 32 are both in the inactive state, while the main valve 203 in the main channel 40 is closed, and the pilot atmospheric pressure channel 122 has a partial atmospheric pressure PP Flow to below the main diaphragm 11, but the main diaphragm 11 is elastically pre-compressed by the upper elastic component 111, so that the main diaphragm 11 is kept below the level, and the atmospheric pressure PP can be circulated to the secondary side through the first vacuum break valve 201 The pressure P2, at this time, the secondary side pressure P2 is equal to the atmospheric pressure PP, and the description here is based on the two ends of the main diaphragm 11, and then the center of the main diaphragm 11 and the two ends are compared.

Please refer to FIG. 5 , which is in the working state. First, it can be seen that the vacuum pressure solenoid valve 31 is open, and the vacuum pressure PT is generated through the adjustment channel 121 , so that the main diaphragm 11 is displaced upward to above the level, and the elastic component 111 is blocked by the main diaphragm 11 . Squeeze, and the atmospheric pressure PP originally flowed from the pilot atmospheric passage 122 can enter the position below the main diaphragm 11 to maintain the position above the current level of the main diaphragm 11, while the primary side pressure P1 flows through the guide passage 101 to In the vacuum pressure solenoid valve 31, when the vacuum pressure chamber 12 above the main diaphragm 11 generates a vacuum pressure PT, when the main diaphragm 11 is displaced upward, it will drive the pilot exhaust straight rod 20 and the vacuum valve group 21 located below. The main valve 203 is opened, and the primary side pressure P1 passes through the main valve 203 to form the secondary side pressure P2 to achieve the purpose of vacuum adsorption.

Please refer to FIG. 6 , which is in a stable state. When the vacuum adsorption purpose is achieved, the sensor 33 will transmit relevant information to the control loop P, thereby closing the vacuum pressure solenoid valve 31 , and the vacuum pressure chamber 12 and the adjustment channel 121 The vacuum pressure PT maintains a stable vacuum pressure. At this time, the elastic component 111 and the atmospheric pressure PP entering from the pilot atmospheric channel 122 will also press each other on the main diaphragm 11, so that the main diaphragm 11 returns to the level, and the related main diaphragm 11 The valve 203 is also closed due to the displacement of the pilot exhaust straight rod 20 to drive the vacuum valve group 21 to maintain the overall internal vacuum.

Please refer to FIGS. 7-8 , which is the first stage of breaking the vacuum state. First, it can be seen that the atmospheric pressure solenoid valve 32 is opened, and the external atmospheric pressure PP is introduced from an atmospheric port 231 into the vacuum pressure chamber 12 through the adjustment channel 121 to keep the original level. The main diaphragm 11 is displaced downward, and the first vacuum breaking valve 201 is gradually opened, so that the atmospheric pressure PP in the pilot atmospheric passage 122 can pass down the first vacuum breaking valve 201 along the pilot exhaust straight rod 20, to Make minor adjustments to the internal vacuum.

Please refer to FIGS. 9-10 , it is the second stage of breaking vacuum state, following the first stage of breaking vacuum state, after the atmospheric pressure solenoid valve 32 is opened, the atmospheric pressure PP is continuously introduced from the atmospheric port 321, so that the main diaphragm 11 continues to When moving downward, the limiting protrusion 204 of the pilot exhaust straight rod 20 will push the second vacuum breaking valve 202 to open, and the atmosphere channel 123 located under the second vacuum breaking valve 202 will provide more atmosphere at this time The pressure PP enters, so that the adjustment range of the internal vacuum is more rapid. When the main diaphragm 11 goes down to the bottom of the vacuum pressure chamber 12, the flow rate of the atmospheric pressure PP entering the pilot atmospheric channel 122 will be reduced to a minimum, and it will also make The atmospheric pressure PP flow rate entering the atmospheric passage 123 rises to the maximum.

To sum up, the vacuum electronically controlled proportional valve of the present invention cooperates with the designed pilot air passage 122 and the pilot exhaust straight rod 20, so that the outside air can flow into the first vacuum breaking valve 201 and the second vacuum breaking valve 202. The secondary side pressure P2, combined with vacuum strength adjustment, can improve the adjustment response speed, and can simplify the test inconvenience caused by the conventional complex ventilation circuit.

The structure, features and effects of the present invention have been described in detail above according to the embodiments shown in the drawings. The above are only the preferred embodiments of the present invention, but the scope of the present invention is not limited by the drawings. Changes made to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, shall fall within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and drawings.

Claims (3)

1. A vacuum electrically controlled proportional valve, comprising:

the air conditioner comprises a valve seat (10), a guide seat (30) is combined above the valve seat (10), a main diaphragm (11) is clamped between the guide seat (30) and the valve seat (10) to form a vacuum pressure cavity (12), an elastic component (111) is arranged above the main diaphragm (11), a pilot exhaust straight rod (20) is embedded in the center of the main diaphragm (11), the pilot exhaust straight rod (20) is further provided with a vacuum valve set (21), a vacuum piezoelectric solenoid valve (31), an atmospheric pressure solenoid valve (32) and a sensor (33) are further connected above the guide seat (30), and an adjusting channel (121) is communicated to the upper part of the vacuum pressure cavity (12) and is controlled by the vacuum piezoelectric solenoid valve (31) and the atmospheric pressure solenoid valve (32);

a pilot atmospheric channel (122) arranged in the valve seat (10) and communicated to the space below the main diaphragm (11) so as to supply atmospheric pressure (PP) for circulation;

a main channel (40) arranged between the valve seat (10) and the guide seat (30), wherein the main channel (40) can be used for the flow of a primary pressure (P1) and a secondary pressure (P2), and a guide channel (101) controlled by the vacuum solenoid valve (31) and a feedback channel (102) connected with the sensor (33) are additionally arranged in the main channel (40);

the method is characterized in that: a first vacuum breaking valve (201) is arranged above the valve seat (10) of the pilot exhaust straight rod (20), a second vacuum breaking valve (202) is arranged between the upper part of the vacuum valve group (21) and the pilot exhaust straight rod (20), when the primary pressure (P1) cooperates with the vacuum solenoid valve (31) through the guide channel (101) to operate, a vacuum Pressure (PT) is generated in the vacuum pressure chamber (12) through the adjusting channel (121), the main diaphragm (11) is upwards linked with the pilot exhaust straight rod (20), and then a main valve (203) below the vacuum valve group (21) is driven to open, the primary pressure (P1) forms the secondary pressure (P2) through the main valve (203), so as to form vacuum adsorption until the main diaphragm (11) returns to the horizontal position, the pilot exhaust straight rod (20) is driven to enable the main valve (203) to be in a stable pressure state after being closed; when the atmospheric pressure solenoid valve (32) is opened and the main diaphragm (11) is pressed by the adjusting channel (121) to move downwards, the atmospheric pressure (PP) passes through the pilot atmospheric channel (122) to the first vacuum destruction valve (201) to be in an open state, the atmospheric pressure (PP) can partially pass through to reduce the strength of vacuum adsorption, and when the atmospheric pressure (PP) is continuously input, the second vacuum destruction valve (202) is opened to enable the atmospheric pressure (PP) to pass through more.

2. The vacuum electrically controlled proportioning valve of claim 1 wherein: the elastic component (111) is a spring.

3. The vacuum electrically controlled proportioning valve of claim 1 wherein: the vacuum valve group (21) is composed of: the two convex parts (22) are formed by matching a spring (23) with convex surfaces oppositely, the inner parts of the convex parts (22) are in a through design and can be provided with the pilot exhaust straight rod (20), and the upper part and the lower part of the side edge of the pilot exhaust straight rod (20) are respectively provided with a limiting convex stopper (204) which can limit the stroke of the pilot exhaust straight rod (20) in the up-and-down displacement.

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