CN220566631U - Force-multiplying cylinder type diaphragm valve - Google Patents

Abstract

The utility model relates to a doubly powerful cylinder type diaphragm valve relates to diaphragm valve technical field, including the valve body, the piston rod, sealing diaphragm, first piston and second piston, business turn over passageway and piston passageway have been seted up in the valve body, the piston rod is located the piston passageway, sealing diaphragm sets up in the piston rod just to business turn over passageway one end, first air cavity and second air cavity have been seted up in the valve body, first piston is located first air cavity and separates into first air cavity and second air cavity, the second piston is located the second air cavity and separates into third air cavity and fourth air cavity with the second air cavity, second air cavity and fourth air cavity are just to sealing diaphragm, first piston passes through the piston rod with the second piston and is connected, be provided with the control piece in the valve body, second air cavity and fourth air cavity all communicate and have the air feed subassembly, first air cavity and third air cavity all are provided with the passageway of giving vent to anger. The diaphragm valve opening air pressure is reduced, and the probability that the diaphragm valve can be stably opened and closed when the air pressure is unstable is improved.

Description

Force-multiplying cylinder type diaphragm valve

Technical Field

The application relates to the technical field of diaphragm valves, in particular to a double-force cylinder type diaphragm valve.

Background

The diaphragm valve is a stop valve which uses a diaphragm as an opening and closing piece to seal a flow passage, cut off fluid and separate the inner cavity of the valve body from the inner cavity of the valve cover. Most of the existing diaphragm valves have a single air chamber structure, and the diaphragm valve is opened by inputting air into one air chamber against the pressure of a spring.

The current single air cavity diaphragm valve comprises a valve body, a spring, a piston, a diaphragm and a liquid inlet pipe. The valve body is internally provided with a cavity, the piston is placed in the cavity and is in sliding connection with the cavity wall of the cavity, the spring is abutted above the piston, the lower part of the piston is connected with a diaphragm, and in a normal state, the spring is abutted against the piston to enable the diaphragm below to block the liquid inlet pipe, so that liquid in the liquid inlet pipe is prevented from flowing. An air inlet is arranged on the side wall of the cavity below the piston and is connected with an air pump. When the diaphragm valve is opened, the air pump conveys air to the air inlet, so that the pressure in the cavity below the piston is increased, and when the air pressure in the cavity exceeds the opening air pressure of the diaphragm valve, the piston moves upwards to drive the sealing diaphragm to move upwards, so that the diaphragm valve is opened.

In a factory, one air pump supplies air to a plurality of diaphragm valves at the same time, the air pressure supplied to each diaphragm valve tends to be unstable, and a preset opening air pressure may not be reached, so that the diaphragm valves cannot be normally opened.

Disclosure of Invention

In order to reduce the standard of the opening air pressure of a diaphragm valve and improve the probability that the diaphragm valve can be stably opened and closed even when the air pressure is unstable, the application provides a double-force cylinder type diaphragm valve.

The application provides a doubly power cylinder type diaphragm valve adopts following technical scheme:

a double-force cylinder type diaphragm valve comprises a valve body, a piston rod, a sealing diaphragm, a first piston and a second piston;

the valve body is internally provided with an access channel for liquid or gas to enter and exit and a piston channel communicated with the access channel, the piston rod is positioned in the piston channel and slides along the direction close to or far away from the access channel, the sealing diaphragm is arranged at one end of the piston rod opposite to the access channel, a first air cavity and a second air cavity communicated with the access channel are sequentially formed in the valve body along the arrangement direction of the piston channel, the first piston is positioned in the first air cavity and divides the first air cavity into a first air chamber and a second air chamber, the second piston is positioned in the second air cavity and divides the second air cavity into a third air chamber and a fourth air chamber, the second air chamber and the fourth air chamber are opposite to the sealing diaphragm, and the first piston is connected with the second piston through the piston rod;

the valve body is internally provided with a control piece used for pushing the piston rod to drive the sealing diaphragm to slide into the inlet and outlet channel, the second air chamber and the fourth air chamber are both communicated with an air supply assembly used for driving the first piston and the second piston to slide in the direction away from the inlet and outlet channel, and the first air chamber and the third air chamber are both provided with an air outlet channel.

Through adopting above-mentioned technical scheme, when the initial state of doubly powerful cylinder type diaphragm valve, thereby sealing diaphragm is located the business turn over passageway shutoff business turn over passageway, when opening doubly powerful cylinder type diaphragm valve, the air pump is through air feed assembly with air input to second air chamber and fourth air chamber, the pressure increases in second air chamber and the fourth air chamber, first piston and second piston drive the piston rod simultaneously and rise, and with the air discharge in first air chamber and the second air chamber, reduce the resistance that receives when the piston rod rises, thereby separation sealing diaphragm and business turn over passageway, open doubly powerful cylinder type diaphragm valve. The air pump simultaneously transmits air into the two air cavities through the air supply assembly, and under the same pressure, the air pressure generated by ventilation of one air cavity in the prior art generates a force resisting the control member. The minimum air pressure standard required by the method is smaller than that required by the prior art, the standard of the opening air pressure of the diaphragm valve is reduced, and the probability that the diaphragm valve can be stably opened and closed when the air pressure is unstable is improved.

Optionally, the piston rod deviates from the coaxial gas-supply channel of having seted up of gas-supply channel one end, the one end of gas-supply channel with the air feed subassembly intercommunication, the lateral wall of gas-supply channel set up with the first gas-supply hole of second air chamber intercommunication and with the second gas-supply hole of third air chamber intercommunication.

By adopting the technical scheme, one gas transmission channel is communicated with two gas transmission holes, so that the number of pipelines required to be connected with the gas pump is reduced, and the installation steps of the double-force cylinder type diaphragm valve are reduced.

Optionally, the control piece includes the spring, the spring is located the first air chamber, the one end of spring with the terminal surface butt of first piston, the other end of spring with the first air chamber deviates from the chamber wall butt of first piston.

By adopting the technical scheme, the control piece is designed as the spring, and the spring gives the first piston a force towards the inlet and outlet channel, so that the sealing diaphragm on the piston rod is propped against the inlet and outlet channel in a normal state, and the double-force cylinder diaphragm valve is kept in a normally closed state under the condition of no external force.

Optionally, the air supply assembly comprises a control box, a first air pipe, a second air pipe and an air pump air pipe;

the air pump is characterized in that the first air conveying pipe, the second air conveying pipe and the air pump air conveying pipe are communicated with the control box, the first air conveying pipe deviates from one end of the control box and is communicated with the air conveying channel, the second air conveying pipe deviates from one end of the control box and is communicated with the air outlet channel of the third air chamber, the air pump air conveying pipe deviates from one end of the control box and is connected with the air pump, and the control box is used for controlling the communication state of the air pump air conveying pipe and the first air conveying pipe and the second air conveying pipe, and the first air conveying pipe and the second air conveying pipe are not communicated with the air pump air conveying pipe at the same time.

Through adopting above-mentioned technical scheme, the communication of control box control air pump gas-supply pipe and first gas-supply pipe or second gas-supply pipe for when the air pump can be to first gas-supply pipe gas-supply, the piston rod moves up and opens doubly power cylinder type diaphragm valve, and when the air pump is to the gas-supply of second gas-supply pipe, the piston rod moves down with higher speed, doubly power cylinder type diaphragm valve closure. The utilization efficiency of the air pump is improved, the closing speed of the double-force air cylinder type diaphragm valve is accelerated, and the performance of the double-force air cylinder type diaphragm valve is enhanced.

Optionally, a first channel for communicating the air pump air pipe with the first air pipe, a second channel for communicating the air pump air pipe with the second air pipe, a third channel for communicating the first air pipe with the outside of the control box, and a fourth channel for communicating the second air pipe with the outside of the control box are arranged in the control box, and a first control piece for controlling the communication state of the first channel and the third channel, a second control piece for controlling the second channel and the fourth channel, and a total control piece for synchronously controlling the first control piece and the second control piece are arranged in the control box;

the first passage and the third passage are not in simultaneous communication, and the second passage and the fourth passage are not in simultaneous communication.

Through adopting above-mentioned technical scheme, when opening doubly power cylinder type diaphragm valve, total control spare can control first passageway and fourth passageway intercommunication simultaneously, and the air pump is through the air pump gas-supply pipe to first gas-supply pipe gas-supply, and the second gas-supply pipe is discharged. When the double-force air cylinder type diaphragm valve is closed, the main control piece can control the second channel and the third channel to be simultaneously communicated, and the air pump is used for delivering air to the second air delivery pipe through the air pump air delivery pipe, and the first air delivery pipe is used for exhausting air. The communication state between two of the four channels in the control box can be controlled simultaneously by controlling the main control piece, so that the communication control of the channels in the control box is more convenient.

Optionally, the first control piece includes first valve block and first bull stick, first valve block passes through first bull stick rotate install in the control box, first valve block is located first passageway with between the third passageway, first valve block clockwise rotation lid in the third passageway and anticlockwise rotation lid in first passageway, first bull stick with total control piece is connected.

Through adopting above-mentioned technical scheme, set up first valve block between first passageway and third passageway, utilize the rotation of first valve block to come the communication state of synchronous control first passageway and third passageway for the communication state control of first passageway and third passageway is more convenient.

Optionally, the second control piece includes second valve block and second bull stick, the second valve block passes through the second bull stick rotate install in the control box, the second valve block is located between second passageway and the fourth passageway, the second valve block clockwise cover in the second passageway and anticlockwise cover in the fourth passageway, the second bull stick with total control piece is connected.

Through adopting above-mentioned technical scheme, set up the second valve block between second passageway and fourth passageway, utilize the rotation of second valve block to come the communication state of synchronous control second passageway and fourth passageway for the communication state control of second passageway and fourth passageway is more convenient.

Optionally, the total control piece includes first drive gear, second drive gear, third drive gear and control bull stick, first drive gear with first bull stick coaxial coupling, second drive gear with second bull stick coaxial coupling, third drive gear be located first drive gear with between the second drive gear and with first drive gear, the second drive gear meshes, control bull stick one end with third drive gear coaxial coupling, the other end passes the control box and design into the knob form.

Through adopting above-mentioned technical scheme, rotate the outer control bull stick knob form part of control box, can be by the rotation of control bull stick control third drive gear, make things convenient for the drive of total control, the rotation of third drive gear drives first drive gear and second drive gear's rotation, first bull stick of accessible first drive gear and second drive gear drive, the equidirectional rotation of second bull stick for rotate the control bull stick can realize the effect of simultaneous control first control and second control, simplified the operation procedure of total control.

Optionally, be provided with first locating part and the second locating part that the structure is the same in the control box, first locating part set up in between first passageway and the third passageway, the second locating part set up in between the second passageway with the fourth passageway, first locating part includes first limiting plate and first stopper, first valve block with the second valve block sets up to elastic material, first valve block ability joint in first limiting plate with between the first stopper and keep the intercommunication of first passageway closed simultaneously.

Through adopting above-mentioned technical scheme, when first passageway and fourth passageway intercommunication, first valve block is located between first limiting plate and the first stopper, and the second valve block is located one side that the second limiting plate was kept away from to the second stopper, when rotating the control lever and making second passageway and fourth passageway intercommunication, first valve block is rotated to one side that keeps away from first limiting plate because first stopper is crossed to elasticity of itself, and the second valve block is crossed the second limiting plate and is located between second limiting plate and the second limiting block because elasticity of itself. The valve plate is limited in the movement direction through the first limiting piece and the second limiting piece, so that the probability of abnormal gas transmission caused by rotation of the valve plate is reduced.

Optionally, a guide block is arranged at one end, opposite to the fourth air chamber, of the second piston, and a guide chute in sliding connection with the guide block is arranged on a cavity wall, opposite to the guide block, of the fourth chamber.

By adopting the technical scheme, the second piston is limited to rotate by the guide block, so that the probability of influencing the sealing effect of the sealing diaphragm on the inlet and outlet channels due to the rotation of the second piston is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the double-force cylinder type diaphragm valve is opened, the air pump simultaneously transmits air into the two air cavities through the air supply assembly, and under the same pressure, the air pressure generated by ventilation of one air cavity in the prior art generates a force resisting the control piece. The minimum air pressure standard required by the method is smaller than that required by the prior art, the standard of the opening air pressure of the diaphragm valve is reduced, and the probability that the diaphragm valve can be stably opened and closed when the air pressure is unstable is improved;

2. when the double-force cylinder type diaphragm valve is closed, the second air pipe is communicated with the air pump air pipe, so that the air pump can transfer air into the third air chamber through the air pump air pipe, the air pressure in the third air chamber is improved, a downward force is given to the piston rod, the closing of the double-force cylinder type diaphragm valve is accelerated, and the sealing performance of the double-force cylinder type diaphragm valve is enhanced;

3. when the double-force cylinder type diaphragm valve is controlled to be opened and closed, the control box controls the air pump air pipe to be communicated with the first air pipe or the second air pipe, and the first channel and the second channel can be communicated through rotating the control rotating rod, so that the double-force cylinder type diaphragm valve is controlled to be opened and closed, and the double-force cylinder type diaphragm valve is convenient to use.

Drawings

Fig. 1 is a schematic view of the external structure of an embodiment of the present application.

Fig. 2 is a schematic diagram of the internal structure of an embodiment of the present application.

Fig. 3 is a schematic diagram of the overall control installation in an embodiment of the present application.

FIG. 4 is a schematic view of the installation of a first control member and a second control member in an embodiment of the present application

In the figure: 1. a valve body; 12. an access passage; 13. a piston passage; 14. a first air chamber; 141. a first air chamber; 142. a second air chamber; 15. a second air chamber; 151. a third air chamber; 152. a fourth air chamber; 1521. a guide chute; 16. an air outlet channel; 2. a piston rod; 21. a gas transmission channel; 211. a first gas delivery port; 212. a second gas delivery port; 3. sealing the diaphragm; 4. a first piston; 5. a second piston; 6. a control member; 61. a spring; 7. a gas supply assembly; 71. a control box; 711. a first channel; 712. a second channel; 713. a third channel; 714. a fourth channel; 715. a first control member; 7151. a first valve plate; 7152. a first rotating lever; 716. a second control member; 7161. a second valve plate; 7162. a second rotating rod; 717. a master control; 7171. a first transmission gear; 7172. a second transmission gear; 7173. a third transmission gear; 7174. a control rotating rod; 718. a first limiting member; 7181. a first limiting plate; 7182. a first limiting block; 719. a second limiting piece; 7191. a second limiting plate; 7192. a second limiting block; 72. a first gas pipe; 73. a second gas pipe; 74. an air pump air pipe; 8. and a guide block.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses a double-force cylinder type diaphragm valve. Referring to fig. 1 and 2, the valve comprises a valve body 1, a piston rod 2, a sealing diaphragm 3, a first piston 4 and a second piston 5.

The valve body 1 is internally provided with an inlet and outlet channel 12 for liquid or gas to enter and exit and a piston channel 13 communicated with the inlet and outlet channel 12, and the piston rod 2 is positioned in the piston channel 13 and slides along the direction approaching or separating from the inlet and outlet channel 12. The sealing diaphragm 3 is arranged at the end of the piston rod 2 opposite to the inlet and outlet channel 12. A first air cavity 14 and a second air cavity 15 which are communicated with the inlet and outlet channel 12 are sequentially arranged in the valve body 1 along the arrangement direction of the piston channel 13, the first piston 4 is positioned in the first air cavity 14 and divides the first air cavity 14 into a first air chamber 141 and a second air chamber 142, and the second piston 5 is positioned in the second air cavity 15 and divides the second air cavity 15 into a third air chamber 151 and a fourth air chamber 152. The second air chamber 142 and the fourth air chamber 152 are opposite to the sealing diaphragm 3, and the first piston 4 and the second piston 5 are in threaded connection through the piston rod 2.

The valve body 1 is internally provided with a control piece 6 for pushing the piston rod 2 to drive the sealing diaphragm 3 to slide into the inlet and outlet channel 12, the control piece 6 comprises a spring 61, the spring 61 is positioned in the first air chamber 141, one end of the spring 61 is abutted with the end face of the first piston 4, and the other end of the spring 61 is abutted with the cavity wall of the first air chamber 141, which is away from the first piston 4. The second air chamber 142 and the fourth air chamber 152 are both communicated with an air supply assembly 7 for driving the first piston 4 and the second piston 5 to slide away from the inlet and outlet channel 12, and the first air chamber 141 and the third air chamber 151 are both provided with an air outlet channel 16.

When the double-force cylinder type diaphragm valve is in an initial state, the sealing diaphragm 3 is positioned in the inlet and outlet channel 12 so as to block the inlet and outlet channel 12, and when the double-force cylinder type diaphragm valve is opened, the air pump inputs air into the second air chamber 142 and the fourth air chamber 152 through the air supply assembly 7, so that the pressure in the second air chamber 142 and the fourth air chamber 152 is increased, and the first piston 4 and the second piston 5 drive the piston rod 2 to rise simultaneously. At the same time, the air in the first air chamber 141 and the third air chamber 151 is discharged through the air outlet channel 16, so that the resistance applied when the piston rod 2 ascends is reduced. The piston rod 2 is lifted up to separate the sealing diaphragm 3 from the inlet and outlet passage 12, and the double-force cylinder type diaphragm valve is opened. The air pump simultaneously transmits air into the two air cavities through the air supply assembly 7, and under the same input air pressure, the air pressure generated by ventilation of one air cavity in the prior art generates a force resisting the control piece 6, and the air pump ventilates the two air cavities to generate the same air pressure and generate two same forces resisting the force of the control piece 6. The minimum air pressure standard required by the method is smaller than that required by the prior art, the standard of the opening air pressure of the diaphragm valve is reduced, and the probability that the diaphragm valve can be stably opened and closed when the air pressure is unstable is improved.

The piston rod 2 has set up gas-supply channel 21 coaxially deviating from gas-supply channel one end, and gas-supply channel 21's lateral wall has set up the first gas-supply hole 211 with second air chamber 142 intercommunication and has set up the second gas-supply hole 212 with fourth air chamber 152 intercommunication, and gas-supply channel 21's one end connection is provided with air feed assembly 7, and the gas-out channel 16 that is located third air chamber 151 also is connected with air feed assembly 7.

Referring to fig. 2 and 3, the air supply assembly 7 includes a first air supply pipe 72, a second air supply pipe 73, an air pump air supply pipe 74, and a control box 71, one end of the first air supply pipe 72 is connected to the air supply passage 21, and the other end is connected to one end of the control box 71. One end of the second gas transmission channel 21 is connected with the gas outlet channel 16 in the third gas chamber 151, and the other end is connected with one end of the control box 71 close to the valve body 1. One end of the air pump air pipe 74, which is away from the air pump, is connected with one end of the control box 71, which is away from the valve body 1.

When the double-force air pressure diaphragm valve is opened, the control box 71 controls the air pump to transfer air into the first air transfer pipe 72 through the air pump air transfer pipe 74, the second air transfer pipe 73 is communicated with the outside, air enters the second air chamber 142 and the fourth air chamber 152 through the first air transfer hole 211 and the second air transfer hole 212 in the first air transfer pipe 72, the first piston 4 and the second piston 5 are driven to move upwards, the piston rod 2 drives the sealing diaphragm 3 to leave the inlet and outlet channel 12, and accordingly the double-force air cylinder type diaphragm valve is opened. The gas in the first gas chamber 141 is discharged to the outside through the gas outlet channel 16, and the gas in the third gas chamber 151 is discharged to the outside through the second gas pipe 73, so that the obstruction of the opening of the double force cylinder type diaphragm valve caused by the movement of the pistons by the gas in the first gas chamber 141 and the third gas chamber 151 is reduced.

When the double-force air pressure diaphragm valve is closed, the control box 71 controls the air pump to convey air to the second air conveying channel 21, the first air conveying channel 21 is communicated with the outside, and the air is conveyed to the third air chamber 151 by the second air conveying pipe 73 to drive the second piston 5 to move downwards, so that the closing speed of the double-force air cylinder diaphragm valve is increased. At this time, the first air delivery pipe 72 is communicated with the outside, and the air in the second air chamber 142 and the fourth air chamber 152 is discharged to the outside, so that the piston rod 2 moves down in an accelerating way, the sealing diaphragm 3 is abutted against the inlet and outlet channel 12 again, and the double-force cylinder type diaphragm valve is closed.

The control box 71 is provided with a first channel 711 for communicating the air pump air pipe 74 with the first air pipe 72, a second channel 712 for communicating the air pump air pipe 74 with the second air pipe 73, a third channel 713 for communicating the first air pipe 72 with the outside of the control box 71, and a fourth channel 714 for communicating the second air pipe 73 with the outside of the control box 71.

A first control member 715 for controlling the communication state of the first passage 711 and the third passage 713, a second control member 716 for controlling the second passage 712 and the fourth passage 714, and a total control member 717 for synchronously controlling the first control member 715 and the second control member 716 are provided in the control box 71.

The first control member 715 includes a first valve plate 7151 and a first rotating rod 7152, the first valve plate 7151 is rotatably installed in the control box 71 through the first rotating rod 7152, the first valve plate 7151 is located between the first channel 711 and the third channel 713, the first valve plate 7151 is rotatably covered on the third channel 713 clockwise and rotatably covered on the first channel 711 anticlockwise, and the first rotating rod 7152 is connected with the main control member 717.

The second control member 716 includes a second valve plate 7161 and a second rotating rod 7162, the second valve plate 7161 is rotatably installed in the control box 71 through the second rotating rod 7162, the second valve plate 7161 is located between the second channel 712 and the fourth channel 714, the second valve plate 7161 covers the second channel 712 clockwise and covers the fourth channel 714 counterclockwise, and the second rotating rod 7162 is connected with the total control member 717.

When the double force cylinder type diaphragm valve is opened, the total control member 717 synchronously controls the rotation of the first rotary lever 7152 and the second rotary lever 7162. The first lever 7152 controls the rotation of the first valve plate 7151 such that the first channel 711 communicates and the third channel 713 is closed. The second rotating rod 7162 controls the second valve plate 7161 to rotate such that the fourth channel 714 is communicated and the second channel 712 is closed. The air pump air pipe 74 is communicated with the first air pipe 72, the air pump is used for conveying air into the first air pipe 72, the second air pipe 73 is used for exhausting air to the outside, and the double-force cylinder type diaphragm valve is opened.

When the double force cylinder type diaphragm valve is closed, the total control member 717 synchronously controls the rotation of the first rotating lever 7152 and the second rotating lever 7162. The first rotating lever 7152 controls the rotation of the first valve plate 7151 such that the third channel 713 communicates and the first channel 711 is closed. The second rotating rod 7162 controls the second valve plate 7161 to rotate such that the second channel 712 is communicated and the fourth channel 714 is closed. The air pump air pipe 74 is communicated with the second air pipe 73, the air pump transmits air into the second air pipe 73, the first air pipe 72 exhausts air to the outside, and the double-force cylinder type diaphragm valve is accelerated to be closed.

Referring to fig. 3 and 4, the general control member 717 includes a first transmission gear 7171, a second transmission gear 7172, a third transmission gear 7173 and a control lever 7174, the first transmission gear 7171 is coaxially connected with the first lever 7152, the second transmission gear 7172 is coaxially connected with the second lever 7162, the third transmission gear 7173 is located between the first transmission gear 7171 and the second transmission gear 7172 and is engaged with the first transmission gear 7171 and the second transmission gear 7172, one end of the control lever 7174 is coaxially connected with the third transmission gear 7173, and the other end of the control lever 7174 passes through the control box 71 and is designed in a knob shape to facilitate manual operation of a worker.

Referring to fig. 2 and 4, a first stopper 718 and a second stopper 719 having the same structure are provided in the control box 71. The first limiting member 718 is disposed between the first channel 711 and the third channel 713, and the second limiting member 719 is disposed between the second channel 712 and the fourth channel 714. The first stopper 718 includes a first stopper plate 7181 and a first stopper 7182, and the first valve plate 7151 and the second valve plate 7161 are provided as elastic materials. The first valve plate 7151 can be clamped between the first limiting plate 7181 and the first limiting block 7182, so that the communication of the first channel 711 is maintained, and meanwhile, the second channel 712 is in a closed state.

When the communication state of the channel in the control box 71 is controlled, the control rotating rod 7174 is rotated to drive the third transmission gear 7173 to rotate so as to synchronously drive the first transmission gear 7171 and the second transmission gear 7172 to synchronously rotate in the same direction, so that the first rotating rod 7152 and the second rotating rod 7162 synchronously turn over, and the communication state of the channel in the control box 71 is controlled.

When the control rotating rod 7174 rotates to enable the first channel 711 to be communicated and the third channel 713 to be closed, the first valve plate 7151 is located between the first limiting plate 7181 and the first limiting block 7182, and the second valve plate 7161 is located at one side of the second limiting block 7192, which is away from the second limiting plate 7191. When the control rotating rod 7174 rotates to enable the second channel 712 to be communicated and the fourth channel 714 to be closed, the first valve plate 7151 deforms and rotates from between the first limiting plate 7181 and the first limiting block 7182 to the side, away from the first limiting plate 7181, of the first limiting block 7182, and meanwhile, the second valve plate 7191 rotates from the side, away from the second limiting plate 7191, of the second limiting block 7192 to between the second limiting plate 7191 and the second limiting block 7192 through deformation.

The implementation principle of the double-force cylinder type diaphragm valve provided by the embodiment of the application is as follows: in a normal state, the sealing diaphragm 3 is pressed in the inlet and outlet passage 12 by the double-force cylinder type diaphragm valve through the spring 61 arranged inside, and the double-force cylinder type diaphragm valve is kept closed. When the double force cylinder type diaphragm valve is opened, the control box 71 controls the first passage 711 and the fourth passage 714 to be in a communication state, and the second passage 712 and the third passage 713 to be in a closed state. The air pump transmits air to the first air transmission pipe 72 through the air pump air transmission pipe 74, the air pressure in the second air chamber 142 and the fourth air chamber 152 is increased, the first piston 4 rod and the second piston 5 rod are simultaneously stressed to move upwards, the piston rod 2 is driven to move, air in the first air chamber 141 and the third air chamber 151 is discharged, the sealing diaphragm 3 is further separated from the inlet and outlet channel 12, and the double-force cylinder diaphragm valve is opened. When the double force cylinder type diaphragm valve is closed, the control lever 7174 is rotated so that the first and fourth passages 711 and 714 are in a closed state, and the second and third passages 712 and 713 are in a communicating state. The air pump is used for conveying air into the second air conveying pipe 73 through the air pump air conveying pipe 74, air in the second air chamber 142 and the fourth air chamber 152 is discharged to the outside through the first air conveying pipe 72, the air pressure in the third air chamber 151 is increased, the second piston 5 is stressed to accelerate to move downwards, and the closing of the double-force cylinder type diaphragm valve is accelerated. Compared with the prior art, the minimum air pressure standard required by the method is smaller than the minimum air pressure standard required by the prior art, the standard of the opening air pressure of the diaphragm valve is reduced, and the probability that the diaphragm valve can be stably opened and closed when the air pressure is unstable is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A double force cylinder type diaphragm valve, characterized in that: the valve comprises a valve body (1), a piston rod (2), a sealing diaphragm (3), a first piston (4) and a second piston (5);

an inlet and outlet channel (12) for liquid or gas to enter and exit and a piston channel (13) communicated with the inlet and outlet channel (12) are formed in the valve body (1), the piston rod (2) is located in the piston channel (13) and slides along the direction close to or far away from the inlet and outlet channel (12), the sealing diaphragm (3) is arranged at one end of the piston rod (2) opposite to the inlet and outlet channel (12), a first air chamber (14) and a second air chamber (15) communicated with the inlet and outlet channel (12) are sequentially formed in the valve body (1) along the arrangement direction of the piston channel (13), the first piston (4) is located in the first air chamber (14) and separates the first air chamber (14) into an air chamber (141) and a second air chamber (142), the second piston (5) is located in the second air chamber (15) and separates the second air chamber (15) into a third air chamber (151) and a fourth air chamber (152), and the second air chamber (142) and the fourth air chamber (152) are sequentially formed in the valve body (1) opposite to the first piston (5) and the second piston (5) opposite to the sealing diaphragm (2);

the valve is characterized in that a control piece (6) used for pushing the piston rod (2) to drive the sealing diaphragm (3) to slide into the inlet and outlet channel (12) is arranged in the valve body (1), the second air chamber (142) and the fourth air chamber (152) are communicated with an air supply assembly (7) used for driving the first piston (4) and the second piston (5) to slide in the direction away from the inlet and outlet channel (12), and the first air chamber (141) and the third air chamber (151) are both provided with an air outlet channel (16).

2. The double force cylinder type diaphragm valve of claim 1, wherein: the piston rod (2) deviates from one end of the inlet and outlet channel (12) and is coaxially provided with a gas transmission channel (21), one end of the gas transmission channel (21) is communicated with the gas supply assembly (7), and the side wall of the gas transmission channel (21) is provided with a first gas transmission hole (211) communicated with the second gas chamber (142) and a second gas transmission hole (212) communicated with the fourth gas chamber (152).

3. The double force cylinder diaphragm valve of claim 2, wherein: the control piece (6) comprises a spring (61), the spring (61) is located in the first air chamber (141), one end of the spring (61) is abutted with the end face of the first piston (4), and the other end of the spring (61) is abutted with the cavity wall of the first air chamber (141) deviating from the first piston (4).

4. The double force cylinder diaphragm valve of claim 2, wherein: the air supply assembly (7) comprises a control box (71), a first air pipe (72), a second air pipe (73) and an air pump air pipe (74);

the air pump is characterized in that the first air conveying pipe (72), the second air conveying pipe (73) and the air pump air conveying pipe (74) are all communicated with the control box (71), the first air conveying pipe (72) is deviated from one end of the control box (71) and is communicated with the air conveying channel (21), the second air conveying pipe (73) is deviated from one end of the control box (71) and is communicated with the air outlet channel (16) of the third air chamber (151), the air pump air conveying pipe (74) is deviated from one end of the control box (71) and is connected with the air pump, and the control box (71) is used for controlling the air pump air conveying pipe (74) and the first air conveying pipe (72) and the second air conveying pipe (73) are in a communicating state, and the first air conveying pipe (72) and the second air conveying pipe (73) are simultaneously communicated with the air pump air conveying pipe (74).

5. The double force cylinder type diaphragm valve of claim 4, wherein: a first channel (711) communicated with the air pump air pipe (74) and the first air pipe (72), a second channel (712) communicated with the air pump air pipe (74) and the second air pipe (73), a third channel (713) communicated with the first air pipe (72) and the outside of the control box (71), and a fourth channel (714) communicated with the second air pipe (73) and the outside of the control box (71) are formed in the control box (71), and a first control piece (715) used for controlling the communication state of the first channel (711) and the third channel (713), a second control piece (716) used for controlling the second channel (712) and the fourth channel (714) and a total control piece (717) used for synchronously controlling the first control piece (715) and the second control piece (716) are arranged in the control box (71);

the first channel (711) and the third channel (713) are not in simultaneous communication, and the second channel (712) and the fourth channel (714) are not in simultaneous communication.

6. The double force cylinder diaphragm valve of claim 5, wherein: the first control piece (715) comprises a first valve piece (7151) and a first rotating rod (7152), the first valve piece (7151) is rotatably installed in the control box (71) through the first rotating rod (7152), the first valve piece (7151) is located between the first channel (711) and the third channel (713), the first valve piece (7151) is rotatably covered on the third channel (713) clockwise and rotatably covered on the first channel (711) anticlockwise, and the first rotating rod (7152) is connected with the total control piece (717).

7. The double force cylinder type diaphragm valve of claim 6, wherein: the second control piece (716) comprises a second valve piece (7161) and a second rotating rod (7162), the second valve piece (7161) is rotatably installed in the control box (71) through the second rotating rod (7162), the second valve piece (7161) is located between the second channel (712) and the fourth channel (714), the second valve piece (7161) is covered on the second channel (712) clockwise and covered on the fourth channel (714) anticlockwise, and the second rotating rod (7162) is connected with the total control piece (717).

8. The double force cylinder diaphragm valve of claim 7, wherein: the master control member (717) comprises a first transmission gear (7171), a second transmission gear (7172), a third transmission gear (7173) and a control rotating rod (7174), wherein the first transmission gear (7171) is coaxially connected with the first rotating rod (7152), the second transmission gear (7172) is coaxially connected with the second rotating rod (7162), the third transmission gear (7173) is positioned between the first transmission gear (7171) and the second transmission gear (7172) and meshed with the first transmission gear (7171) and the second transmission gear (7172), one end of the control rotating rod (7174) is coaxially connected with the third transmission gear (7173), and the other end of the control rotating rod (7174) penetrates through the control box (71) and is designed into a knob shape.

9. The double force cylinder diaphragm valve of claim 7, wherein: be provided with first locating part (718) and second locating part (719) that the structure is the same in control box (71), first locating part (718) set up in between first passageway (711) and third passageway (713), second locating part (719) set up in between second passageway (712) and fourth passageway (714), first locating part (718) include first limiting plate (7181) and first stopper (7182), first valve block (7151) with second valve block (7161) set up to elastic material, first valve block (7151) can joint in between first limiting plate (7181) and first stopper (7182) and keep the intercommunication of first passageway (711) closed simultaneously second passageway (712).

10. The double force cylinder type diaphragm valve of claim 1, wherein: one end of the second piston (5) right opposite to the fourth air chamber (152) is provided with a guide block (8), and the cavity wall of the fourth air chamber (152) right opposite to the guide block (8) is provided with a guide chute (1521) in sliding connection with the guide block (8).