CN212455713U

CN212455713U - Pneumatic control valve

Info

Publication number: CN212455713U
Application number: CN202021082757.7U
Authority: CN
Inventors: 陈炳彬; 卢科镍; 金颋勋; 荣进
Original assignee: SAIC Volkswagen Automotive Co Ltd
Current assignee: SAIC Volkswagen Automotive Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-02
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a gas accuse valve, include: valve seat, gas accuse valve body and piston mechanism. The valve seat is provided with a liquid inlet, a liquid channel and a liquid outlet, wherein the liquid channel is provided with a valve port. The air control valve body is arranged on the valve seat and is provided with an air inlet, an air channel and an air outlet, wherein the air inlet, the air channel and the air outlet are positioned at one end, far away from the valve seat, of the air control valve body. The piston mechanism is arranged in the pneumatic control valve body, the base of the piston mechanism is close to the gas channel, the connecting rod of the piston mechanism penetrates through the pneumatic control valve body and enters the valve seat, and the end part of the connecting rod is provided with a valve core which is matched with a valve port on the liquid channel. The air control valve is a normally open type air control valve, air is not introduced into an air inlet, the valve core is separated from a valve port, the liquid channel is communicated, air is introduced into the air inlet, the gas channel and the air outlet form air flow, the air flow pushes a base of the piston mechanism, the connecting rod is driven to enable the valve core to seal the valve port, and the liquid channel is cut off.

Description

Pneumatic control valve

Technical Field

The utility model relates to a production line spare part field, more specifically say, relate to liquid flow control spare part.

Background

In a production line, for example, an automobile production line, a cooling device is required to cool down processing equipment at each station. The liquid cooling device is the most common cooling device, and the most common cooling medium in the liquid cooling device is cooling water which is driven to circularly flow, so that the cooling effect is achieved. During normal use, it is necessary to maintain a continuous circulation of the cooling water, but it is also necessary to cut off the circulation of the cooling water when necessary. In addition, the flow rate of the cooling water is also required to be controlled to meet different cooling demands.

The opening and closing of the cooling water circulation and the flow control are generally realized by using a pneumatic control valve.

CN207796117U discloses a normally closed inclined type angle seat pneumatic control valve. Fig. 1 discloses a structural diagram of the normally closed inclined type angle seat pneumatic control valve. The working principle of the normally closed inclined type angle seat pneumatic control valve is as follows: control gas (such as compressed air) with certain pressure enters the pneumatic control chamber 9 from the air inlet interface 6 and is pressurized on the plane of the piston 5, and the piston 5 is supported to drive the piston rod 3 to ascend, so that the conical sealing head 13 is separated from the medium overflow port 11. Thus, the medium passage between the inlet P1 and the outlet P2 is open. A medium, such as cooling water, flows in through the inlet P1 and out through the outlet P2 via the medium overflow 11. If the control gas is closed, the pressure on the piston 5 is removed, and the piston rod 3 falls back again under the dual action of the return spring 8 and the self gravity. The tapered seal head 13 at the lower end of the piston rod 3 closes the medium overflow port 11 to cut off the medium passage, and the medium cannot flow between the ports P1 and P2. The pneumatic control valve is restored to the normally closed state. Component 1, component 2, component 4, component 7, component 10, component 12 and component 14, which are not illustrated in detail in fig. 1, are not germane to the above-described operation, and reference may be made to CN207796117U for a description of these components.

Fig. 2 discloses a structural diagram of another normally closed pneumatic control valve. The working principle of the normally closed pneumatic control valve is as follows: the bottom seat 21 defines a fluid passage having an inlet P1 and an outlet P2, with a port in the fluid passage. The valve body 22 is mounted on the valve seat 21. The valve body 22 has a gas passage formed therein, the gas passage having an inlet G1 and an outlet G2. The gas passage extends to the bottom of the valve body 22 in the area near the valve seat 21. A piston 25 is mounted in the valve body 22, a spring 26 is mounted on the top surface of the piston 25, and the spring force of the spring 26 pushes the piston 25 toward the valve seat 21. The valve body 22 has a stopper assembly 23 at the bottom thereof, and the stopper assembly 23 restricts the lowest position of the piston 25. A rod 27 of the piston passes through the valve body and projects into the valve seat 21, the end of the rod 27 having a valve element 24. The valve core 24 is fitted to a valve port of the liquid passage. When the control air flow (such as compressed air) is not introduced, the spring 26 presses the piston 25 against the limiting assembly 23, and the liquid channel of the valve core 24 for closing the valve port is cut off. The pneumatic control valve is in a normally closed state. After the compressed air is introduced into the inlet G1, the compressed air flows to the lower part of the piston 25 along the air passage, pushes the bottom surface of the piston 25 from bottom to top and compresses the spring 26. When the piston 25 rises, the valve core 24 is separated from the valve port, the liquid channel is opened, and the liquid can be communicated between the inlet P1 and the outlet P2. After the compressed air is cut off, the spring 26 is reset, the piston 25 descends, and the valve core 24 closes the fluid passage again and returns to the normally closed state.

The common problem of the two pneumatic control valves is that the two pneumatic control valves are normally closed, liquid does not flow when compressed gas is not introduced, and if liquid flow is required, the compressed gas is maintained. This is not compatible with the use conditions of the liquid cooling device. In the working state of the liquid cooling equipment, the liquid circulation needs to be maintained for most of time, and therefore the pneumatic control valve is required to continuously introduce compressed gas, so that the consumption of the compressed gas is large. In addition, the two pneumatic control valves are designed to be closed structures, and the valve body is not provided with an observation port. After long-term use, the valve core and other sealing elements can degrade in sealing performance due to aging, and the gas channel and the liquid channel can be connected in series. The entry of compressed gas into the liquid passage affects the flow rate of cooling water, so that the cooling effect is reduced. The water entering the gas passage also causes the control capability of the piston to be reduced, and the water accumulation in the valve body also causes the gas control to be invalid.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gas accuse valve open in usual.

According to an embodiment of the utility model, a gas accuse valve is proposed, include: valve seat, gas accuse valve body and piston mechanism. The valve seat is provided with a liquid inlet, a liquid channel and a liquid outlet, wherein the liquid channel is provided with a valve port. The air control valve body is arranged on the valve seat and is provided with an air inlet, an air channel and an air outlet, wherein the air inlet, the air channel and the air outlet are positioned at one end, far away from the valve seat, of the air control valve body. The piston mechanism is arranged in the pneumatic control valve body, the base of the piston mechanism is close to the gas channel, the connecting rod of the piston mechanism penetrates through the pneumatic control valve body and enters the valve seat, and the end part of the connecting rod is provided with a valve core which is matched with a valve port on the liquid channel. The air control valve is a normally open type air control valve, air is not introduced into an air inlet, the valve core is separated from a valve port, the liquid channel is communicated, air is introduced into the air inlet, the gas channel and the air outlet form air flow, the air flow pushes a base of the piston mechanism, the connecting rod is driven to enable the valve core to seal the valve port, and the liquid channel is cut off.

In one embodiment, the pneumatic control valve body forms a buffer cavity at one end close to the valve seat, and a drain hole is formed in the side wall of the buffer cavity.

In one embodiment, the side wall of the buffer cavity is also provided with a vent hole.

In one embodiment, the buffer cavity is composed of a first partition plate, a second partition plate and a side wall connecting block, the second partition plate is tightly attached to the valve seat, the second partition plate is fixed on the side wall connecting block, the side wall connecting block is connected to the side wall of the pneumatic control valve body so as to fix the second partition plate and the side wall of the pneumatic control valve body, the first partition plate is fixed on the side wall of the pneumatic control valve body, the first partition plate is arranged in the middle of the pneumatic control valve body, and the buffer cavity is formed between the first partition plate and the second partition plate.

In one embodiment, the sealing rings are used for sealing between the first partition plate and the side wall of the pneumatic control valve body and between the second partition plate and the side wall connecting block.

In one embodiment, the base of the piston mechanism is tightly matched with the side wall of the pneumatic control valve body and sealed by the sealing ring, the outer side face of the base is a face forming the gas channel, a spring is installed between the inner side face of the base and the first partition plate, and the spring force of the spring acts on the base to enable the base to be far away from the first partition plate. A connecting rod of the piston mechanism penetrates through the first partition plate and the second partition plate and enters the valve seat, a valve core is arranged at the end part of the connecting rod, and the connecting rod, the first partition plate and the second partition plate are sealed through a sealing ring.

In one embodiment, the valve seat is a right angle valve seat, and the direction of the liquid passage in the valve seat is perpendicular to the direction of movement of the piston means.

In one embodiment, the valve seat is an angled valve seat, and the direction of the fluid passage in the valve seat is at an oblique angle to the direction of movement of the piston means.

The utility model discloses a gas accuse valve has following advantage:

1) a normally open mode of operation. The utility model utilizes the force of the spring and the water pressure to make the pneumatic control valve in a normally open state; a short cooling water shut-off can be achieved by compressed air drive. Under the working condition that the cooling water circulation needs to be realized for a long time (such as a closed circulating water cooling system), the use amount of the compressed air is greatly saved.

2) And (5) gas-liquid separation. Set up the buffer between water route and the gas circuit for cooling water and compressed air are the complete separation, effectively prevent the problem of mutual interference between cooling water and the compressed air, greatly reduced the fault rate of all kinds of relevant equipment.

3) Easy to repair and maintain. The small holes arranged in the buffer area can timely find the phenomena of air leakage and water leakage, so that rapid troubleshooting is realized, and the device is safer and more reliable; the condition that the gas accuse valve main part is corroded can be avoided in split type design, reduces the dismouting of maintenance and maintenance in-process valve body main part, extension product life, reduces the gas accuse valve replacement cost.

Drawings

FIG. 1 discloses a block diagram of a normally closed angled seat pneumatic control valve used in the prior art.

Fig. 2 discloses a block diagram of another normally closed pneumatic control valve used in the prior art.

Fig. 3 discloses a structure diagram of a normally open pneumatic control valve according to an embodiment of the present invention.

Fig. 4 discloses a structural diagram of a normally open pneumatic control valve according to another embodiment of the present invention.

Fig. 5 discloses a structural view of a normally open pneumatic control valve according to another embodiment of the present invention.

Detailed Description

Referring to fig. 3, fig. 3 discloses a structural diagram of a normally open pneumatic control valve according to an embodiment of the present invention. This gas accuse valve includes: valve seat 106, vent valve body 101, and a piston mechanism. The valve seat 106 has an inlet port P1, a liquid passage having a port, and an outlet port P2. The pneumatic control valve body 101 is mounted on a valve seat 106. The pneumatic control valve body 101 has a gas inlet G1, a gas passage and a gas outlet G2, wherein the gas inlet G1, the gas passage and the gas outlet G2 are located at one end of the pneumatic control valve body away from the valve seat. In the embodiment of the utility model, the gas passage is only located the one end of keeping away from the disk seat on the gas pocket valve body to do not extend to the one end that is close to the disk seat. The piston mechanism is installed in the air control valve body 101, the base 102 of the piston mechanism is next to the air channel, the connecting rod 111 of the piston mechanism penetrates through the air control valve body 101 and enters the valve seat 106, the end of the connecting rod 111 is provided with a valve core 110, and the valve core 110 is matched with the valve port on the liquid channel. The utility model discloses a gas accuse valve is open gas accuse valve in usual, and when air inlet G1 did not let in gas, case 110 broke away from the valve port, and liquid channel switches on. When gas is introduced into the gas inlet G1, gas flow is formed by the gas inlet G1, the gas channel and the gas outlet G2, and the gas flow pushes the base 102 of the piston mechanism to drive the connecting rod 111 to enable the valve core 110 to close the valve port and cut off the liquid channel. In consideration of the working state of the liquid cooling equipment, the liquid circulation is maintained for most of time, so that the consumption of compressed gas can be greatly reduced by using the normally-open pneumatic control valve. With continued reference to fig. 3, another improvement of the pneumatic control valve of the present invention is to form a buffer chamber at the end of the pneumatic control valve body close to the valve seat, and a drain hole 109 is formed on the side wall of the buffer chamber. After the buffer chamber having the drain hole is provided, when the gas passage and the liquid passage are in series failure, the cooling water introduced into the buffer chamber flows out from the drain hole 109. The water flowing out of the drain hole can be observed from the outside, and the aging of the sealing element is indicated to be repaired or replaced.

With continued reference to FIG. 3, the internal structure of the pneumatic control valve is as follows: the buffer chamber is formed by the first partition plate 103, the second partition plate 104, and the sidewall connection block 105. The second partition plate 104 abuts against the valve seat 106, the second partition plate 104 is fixed to the side wall connection block 105, and the side wall connection block 105 is connected to the side wall of the air control valve body 101 to fix the second partition plate 104 to the side wall of the air control valve body 101. The first partition plate 103 is fixed to a side wall of the pneumatic control valve body 101. The first partition plate 103 is arranged in the middle of the pneumatic control valve body 101, a buffer cavity is formed between the first partition plate 103 and the second partition plate 104, and a drain hole 109 is formed on the side wall of the pneumatic control valve body at the position corresponding to the buffer cavity. The first partition plate 103 is sealed with the side wall of the pneumatic control valve body 101 by a seal ring 173. The second partition plate 104 and the sidewall connection block 105 are sealed by sealing

rings

174 and 175. Since the second partition plate 104 and the sidewall connection block 105 are stepped surfaces, sealing is required at each step, and thus two sealing

rings

174 and 175 are used. The base 102 of the piston mechanism is a close fit with the side wall of the pneumatic control valve body and is sealed by a sealing ring 171. The base 102 of the piston mechanism is not fixed to the side wall of the pneumatically controlled valve body because the base 102 needs to move up and down along the side wall. However, in order to ensure the sealing property of the gas passage, a seal ring 171 is used to seal between the base and the side wall. The outer side surface (the top surface shown in fig. 3) of the susceptor 102 is a surface constituting a gas passage (the bottom surface of the gas passage in fig. 3). A spring 108 is mounted between the inner side surface (the bottom surface shown in fig. 3) of the base 102 and the first partition plate 103. The spring force of the spring 108 acts on the base 102 such that the base 102 is away from the first spacer plate 103. The connecting rod 111 of the piston mechanism passes through the first partition plate 103 and the second partition plate 104 and into the valve seat 106. The end of the connecting rod 111 has a valve core 110, and the valve core 110 matches with the valve port on the liquid channel. The connecting rod 111 and the first partition plate 103 are sealed by a seal ring 172, and the connecting rod and the second partition plate are also sealed by a seal ring.

The pneumatic control valve of this embodiment is a normally open pneumatic control valve, and when the gas is not introduced into the gas inlet G1, the base 102 is away from the first partition plate 103 under the action of the spring 108, the valve core 110 is separated from the valve port, and the liquid passage is conducted. When gas is introduced into the gas inlet G1, gas flow is formed by the gas inlet G1, the gas channel and the gas outlet G2, and the gas flow acts on the top surface of the base 102 to push the base 102 of the piston mechanism to move downwards and drive the connecting rod 111 to move downwards, so that the valve core 110 closes the valve port and cuts off the liquid channel. After the airflow is eliminated, the spring force of the spring 108 causes the base to reset upward again, and the pneumatic control valve returns to the normally open state.

The valve seat 106 in the embodiment shown in fig. 3 is a right angle valve seat, the direction of the liquid passage in the valve seat 106 being perpendicular to the direction of movement of the piston means.

Fig. 4 discloses a structural diagram of a normally open pneumatic control valve according to another embodiment of the present invention. The embodiment shown in fig. 4 is different from the embodiment shown in fig. 3 in that the distance between the first and

second partition plates

103 and 104 is larger, and the height of the buffer chamber formed by the first and

second partition plates

103 and 104 and the sidewall connection block 105 is higher. A plurality of holes are provided on the side wall of the buffer chamber, wherein the hole at the lower side may be used as the water drain hole 109 and the hole at the upper side may be used as the air exhaust hole 112. The air vent 112 can discharge the compressed air out of the valve body when the air path is sealed and air leakage occurs, so that the overhigh pressure in the valve body is avoided. The bigger buffer cavity can better separate the water path and the air path. The valve seat in the embodiment shown in fig. 3 is also a right-angled valve seat, the direction of the liquid passage in the valve seat being perpendicular to the direction of movement of the piston means.

Fig. 5 discloses a structural view of a normally open pneumatic control valve according to another embodiment of the present invention. The embodiment shown in fig. 4 is compared to the embodiment shown in fig. 3 with the difference that the valve seat 106 is an angled valve seat, the direction of the liquid passage in the valve seat 106 being at an oblique angle to the direction of movement of the piston means. It should be noted, however, that in the embodiment shown in fig. 5, although the valve seat 106 and the fluid passage therein are oriented at an oblique angle to the direction of movement of the piston mechanism, the valve ports in the fluid passage remain horizontally oriented to match the piston mechanism moving in a vertical direction.

The utility model discloses a gas accuse valve has following advantage:

It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is obvious that the present invention is not limited to the above embodiments, and similar changes or modifications can be directly derived or easily suggested by those skilled in the art from the disclosure of the present invention, and all should fall within the protection scope of the present invention. The above-described embodiments are provided to enable persons skilled in the art to make or use the invention, and many modifications and variations may be made to the above-described embodiments by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of the invention is not limited by the above-described embodiments, but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims

1. A pneumatic control valve, comprising:

the valve seat is provided with a liquid inlet, a liquid channel and a liquid outlet, wherein the liquid channel is provided with a valve port;

the pneumatic control valve body is arranged on the valve seat and is provided with a gas inlet, a gas channel and a gas outlet, wherein the gas inlet, the gas channel and the gas outlet are positioned at one end, far away from the valve seat, of the pneumatic control valve body;

the piston mechanism is arranged in the pneumatic control valve body, the base of the piston mechanism is close to the gas channel, the connecting rod of the piston mechanism penetrates through the pneumatic control valve body and enters the valve seat, the end part of the connecting rod is provided with a valve core, and the valve core is matched with a valve port on the liquid channel;

the air control valve is a normally open type air control valve, air is not introduced into the air inlet, the valve core is separated from the valve port, the liquid channel is communicated, air is introduced into the air inlet, the air channel and the air outlet form air flow, the air flow pushes the base of the piston mechanism, the connecting rod is driven to enable the valve core to seal the valve port, and the liquid channel is cut off.

2. An air control valve as claimed in claim 1, wherein the air control valve body forms a buffer cavity at one end close to the valve seat, and a drain hole is formed on the side wall of the buffer cavity.

3. An air control valve as claimed in claim 2, wherein the side wall of the buffer chamber is further provided with an air vent.

4. The pneumatic control valve according to claim 2, wherein the buffer chamber is formed by a first partition plate, a second partition plate and a side wall connecting block, the second partition plate is tightly attached to the valve seat, the second partition plate is fixed on the side wall connecting block, the side wall connecting block is connected to the side wall of the pneumatic control valve body so as to fix the second partition plate and the side wall of the pneumatic control valve body, the first partition plate is fixed on the side wall of the pneumatic control valve body, the first partition plate is arranged in the middle of the pneumatic control valve body, and the buffer chamber is formed between the first partition plate and the second partition plate.

5. An air control valve as claimed in claim 4, wherein a sealing ring is arranged between the first partition plate and the side wall of the air control valve body, and between the second partition plate and the side wall connecting block for sealing.

6. An air control valve as defined in claim 4,

the base of the piston mechanism is tightly matched with the side wall of the pneumatic control valve body and sealed by a sealing ring, the outer side surface of the base is a surface forming a gas channel, a spring is arranged between the inner side surface of the base and the first partition plate, and the spring force of the spring acts on the base to enable the base to be far away from the first partition plate;

a connecting rod of the piston mechanism penetrates through the first partition plate and the second partition plate and enters the valve seat, and the connecting rod, the first partition plate and the second partition plate are sealed through sealing rings.

7. An air control valve as defined in claim 1,

the valve seat is a right-angle valve seat, and the direction of a liquid channel in the valve seat is perpendicular to the movement direction of the piston mechanism.

8. An air control valve as defined in claim 1,

the valve seat is an oblique angle valve seat, and the direction of a liquid channel in the valve seat and the movement direction of the piston mechanism form an oblique angle.