CN218913917U

CN218913917U - Pneumatic quick-closing adjusting actuator

Info

Publication number: CN218913917U
Application number: CN202223395225.0U
Authority: CN
Inventors: 尹建敏; 王焕彩; 黄政洲; 杜陈雷; 许明策; 杨通进; 谢聪聪; 赵丹; 周贤雷
Original assignee: Zhengzhou Pump Valve Manufacturing Co ltd
Current assignee: Zhengzhou Pump Valve Manufacturing Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-04-25
Anticipated expiration: 2032-12-16

Abstract

The utility model discloses a pneumatic quick closing adjusting actuator which is arranged on a valve body and drives a valve rod to rotate so as to realize the on-off of a valve body flow passage, and further comprises an air source, a first electromagnetic valve, a second electromagnetic valve, a positioner, an air control valve, a spring cylinder, a travel switch and a cylinder, wherein a first connecting pipeline is arranged between the air source and the first electromagnetic valve and between the air source and the second electromagnetic valve, one end of the first connecting pipeline, which is far away from the air source, is respectively and electrically connected with the first electromagnetic valve and the second electromagnetic valve, a second connecting pipeline is arranged between the first electromagnetic valve and the cylinder, the air control valve is arranged on the second connecting pipeline and is positioned between the cylinder and the first electromagnetic valve, a third connecting pipeline is arranged between the second electromagnetic valve and the cylinder, and the positioner is arranged on the third connecting pipeline and is positioned between the second electromagnetic valve and the cylinder; the utility model has simple structure and can control the quick closing of the valve in a pneumatic mode.

Description

Pneumatic quick-closing adjusting actuator

Technical Field

The utility model relates to the technical field of actuators, in particular to a pneumatic quick-closing adjusting actuator.

Background

The actuator is mainly matched with a butterfly valve, a ball valve and other part of rotary valves, and is applied to high-safety-level systems such as steam extraction pipelines of a steam turbine, low-pressure steam supplementing pipelines, communicating pipes and the like, TRT blast furnace gas residual pressure generating sets, air inlet pipelines of biological generating sets, mine gas pipelines and the like. However, the existing hydraulic control actuator can only be opened and closed at a constant speed, and the actuator cannot meet the requirement when the valve needs to be closed rapidly in an emergency state.

Patent CN201620340297.0 discloses a spring-type hydraulic control quick-closing actuator, including oil feed pipeline, oil return pipeline, first pipeline, second pipeline, third connecting line, cartridge valve, switch, hydro-cylinder, the spring, be equipped with first cavity in the hydro-cylinder, the second cavity, be equipped with first solenoid valve between first pipeline, second pipeline and the oil feed pipeline, be equipped with first check valve on the first pipeline, the second check valve, be equipped with the first connecting port of mutual switch-on the cartridge valve, the second connector, the third connector, first connecting port is connected through the third connecting line with first cavity, the second connector is connected with the second cavity, third connecting port is connected with oil return pipeline, the actuator is still including the second solenoid valve that is used for controlling the second check valve and opens and cut off the first connecting port of cartridge valve. The utility model provides a spring type hydraulic control quick closing actuator which can open and close a valve at normal speed and can quickly close the valve in an emergency state, and has wide application range.

Problems in the above patents: the actuator adopts a hydraulic control mode, if leakage occurs, the use of a valve can be affected, inconvenience is brought to subsequent cleaning, and the actuator is complex in structure and redundant, so that the cost is increased, and therefore, the actuator with pneumatic control and simple structure needs to be designed.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings in the prior art and provides a pneumatic quick-closing adjusting actuator.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a pneumatic quick-closing adjusting actuator, installs in the valve body and drives the valve rod and rotate and realize valve body runner break-make, still includes air supply, first solenoid valve, second solenoid valve, locator, pneumatic control valve, spring cylinder, travel switch and cylinder, spring cylinder and travel switch three constitute the linkage, the valve rod is connected with travel switch and the valve rod realizes rotating along with travel switch's change, be provided with first connecting line between air supply and first solenoid valve and the second solenoid valve, the one end that first connecting line was kept away from the air supply is connected with first solenoid valve and second solenoid valve electricity respectively, be provided with the second connecting line between first solenoid valve and the cylinder, pneumatic control valve sets up on the second connecting line and is located between cylinder and the first solenoid valve, be provided with the third connecting line between second solenoid valve and the cylinder, the locator sets up in the third connecting line and is located between second solenoid valve and the cylinder.

As a preferable technical scheme of the utility model, the first connecting pipeline is also provided with a stop valve.

As a preferred technical scheme of the utility model, the first connecting pipeline is also provided with a filtering triplet.

As a preferable technical scheme of the utility model, the cylinder is provided with a manual test valve.

As a preferable technical scheme of the utility model, the travel switch comprises a rack and a gear meshed with the rack to form linkage, wherein the gear is connected with a valve rod, one end of the rack is connected with a piston of a cylinder, and the other end of the rack is connected with a spring cylinder.

In summary, the beneficial effects of the utility model are as follows:

1. the valve is closed and opened by driving the rotation of the valve rod and the butterfly plate through the actuator, when the actuator rotates anticlockwise, the butterfly valve is opened, and when the actuator rotates clockwise, the butterfly valve is closed, and the air source pressure is adjusted to the air inlet pressure through the stop valve to the triple piece. When the electromagnetic valve is electrified/powered off, the air source is connected, one path passes through the second electromagnetic valve, the positioner and the air cylinder, the butterfly valve is opened through the air cylinder compression spring, and the other path passes through the first electromagnetic valve and the air control valve to enable the air control valve to change direction and close the air outlet. When the butterfly valve is to be regulated, the E positioner receives 4-20 mA, so that the switching regulation of the butterfly valve can be realized. When the quick closing is to be realized, as long as the two electromagnetic valves are simultaneously powered off/powered off, the pressure of an air inlet source is cut off, and the air cylinder enables air to be rapidly discharged through the pneumatic control valve under the action of the spring, so that the quick closing of the butterfly valve is realized.

Drawings

FIG. 1 is a schematic view showing a structure in which an actuator of the present embodiment is mounted to a valve body;

FIG. 2 is a schematic diagram of an actuator according to the present embodiment;

fig. 3 is a schematic structural diagram of the actuator of the second embodiment.

Reference numerals: 1. a valve body; 2. an actuator; 3. a gas source; 4. a first electromagnetic valve; 5. a second electromagnetic valve; 6. a positioner; 7. a pneumatic control valve; 8. a spring cylinder; 9. a travel switch; 10. a cylinder; 11. a first connecting line; 12. a second connecting pipeline; 13. a stop valve; 14. filtering the triplet; 15. a manual test valve; 16. a gear; 17. a rack; 18. and a third connecting pipeline.

Detailed Description

In order that the manner in which the above recited features, objects and advantages of the present utility model are obtained, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the utility model.

Specific embodiments of the present utility model are described below with reference to the accompanying drawings.

The pneumatic quick closing adjusting actuator is shown in fig. 1 to 3, which is installed on a valve body 1 and drives a valve rod to rotate to realize the on-off of a flow passage of the valve body 1, and further comprises an air source 3, a first electromagnetic valve 4, a second electromagnetic valve 5, a positioner 6, a pneumatic control valve 7, a spring cylinder 8, a travel switch 9 and an air cylinder 10, wherein the air cylinder 10, the spring cylinder 8 and the travel switch 9 form linkage, the valve rod is connected with the travel switch 9 and the valve rod rotates along with the change of the travel switch 9, a first connecting pipeline 11 is arranged between the air source 3 and the first electromagnetic valve 4 and the second electromagnetic valve 5, one end of the first connecting pipeline 11, which is far away from the air source 3, is electrically connected with the first electromagnetic valve 4 and the second electromagnetic valve 5 respectively, a second connecting pipeline 12 is arranged between the first electromagnetic valve 4 and the air cylinder 10, the pneumatic control valve 7 is arranged on the second connecting pipeline 12 and is arranged between the air cylinder 10 and the first electromagnetic valve 4, a third connecting pipeline 18 is arranged between the second electromagnetic valve 5 and the air cylinder 10, the positioner 6 is arranged between the third connecting pipeline 18 and the second electromagnetic valve 5 and the air cylinder 10, and a manual test valve 15 is arranged on the air cylinder 10 in the embodiment.

The first connecting pipe 11 is further provided with a stop valve 13, and the first connecting pipe 11 is further provided with a filtering triplet 14, so as to adjust the intake pressure.

The travel switch 9 comprises a rack 17 and a gear 16 meshed with the rack to form linkage, the gear 16 is connected with a valve rod, one end of the rack 17 is connected with a piston of the cylinder 10, and the other end of the rack 17 is connected with the spring cylinder 8.

Embodiment one:

the pneumatic quick-closing adjusting butterfly valve is characterized in that the valve rod and the butterfly plate are driven by the actuator 2 to rotate to realize closing and opening of the valve, when the actuator 2 rotates anticlockwise, the butterfly valve is opened, and when the actuator 2 rotates clockwise, the butterfly valve is closed; as shown in fig. 2: the pressure of the air source 3 is regulated to the air inlet pressure through the stop valve 13 to the filtering triplet 14, and when the electromagnetic valve is powered off, the air source 3 is cut off and the butterfly valve does not act. When the electromagnetic valve is electrified, the air source 3 is connected, one path passes through the second electromagnetic valve 5, the positioner 6 and the air cylinder 10, the spring is compressed by the air cylinder 10, the butterfly valve is opened, and the other path passes through the first electromagnetic valve 4 and the air control valve 7 to reverse the air control valve 7, so that the exhaust port is closed; when the butterfly valve is to be regulated, the positioner 6 receives 4-20 mA, so that the switching regulation of the butterfly valve can be realized; when the quick closing is realized, as long as the two electromagnetic valves are simultaneously powered off, the pressure of the air inlet source 3 is cut off, and the air cylinder 10 enables air to be rapidly discharged through the pneumatic control valve 7 under the action of the spring, so that the quick closing of the butterfly valve is realized.

Embodiment one:

as shown in fig. 3: the pressure of the air source 3 is regulated to the air inlet pressure through the stop valve 13 to the filtering triplet 14, when the electromagnetic valve is electrified, the air source 3 is cut off, and the butterfly valve does not act. When the electromagnetic valve is powered off, the air source 3 is connected, one path passes through the second electromagnetic valve 5, the positioner 6 and the air cylinder 10, the spring is compressed by the air cylinder 10, the butterfly valve is opened, and the other path passes through the first electromagnetic valve 4 and the air control valve 7 to reverse the air control valve 7, so that the exhaust port is closed. When the butterfly valve is to be regulated, the positioner 6 receives 4-20 mA, so that the switching regulation of the butterfly valve can be realized; when the quick closing is realized, as long as the two electromagnetic valves are electrified at the same time, the pressure of the air inlet source 3 is cut off, and the air cylinder 10 enables air to be rapidly discharged through the pneumatic control valve 7 under the action of the spring, so that the quick closing of the butterfly valve is realized.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing description as preferred embodiments of the utility model, but rather that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. The utility model provides a pneumatic quick-closing adjusting actuator installs in the valve body and drives the valve rod and rotate and realize valve body runner break-make, its characterized in that: still include air supply, first solenoid valve, second solenoid valve, locator, pneumatic control valve, spring cylinder, travel switch and cylinder, spring cylinder and travel switch three constitute the linkage, the valve rod is connected with travel switch and the valve rod realizes rotating along with travel switch's change, be provided with first connecting line between air supply and first solenoid valve and the second solenoid valve, the one end that first connecting line kept away from the air supply is connected with first solenoid valve and second solenoid valve electricity respectively, be provided with the second connecting line between first solenoid valve and the cylinder, the pneumatic control valve sets up on the second connecting line and is located between cylinder and the first solenoid valve, be provided with the third connecting line between second solenoid valve and the cylinder, the locator sets up in the third connecting line and is located between second solenoid valve and the cylinder.

2. The pneumatic quick closing adjustment actuator of claim 1, wherein: and a stop valve is further arranged on the first connecting pipeline.

3. The pneumatic quick closing adjustment actuator of claim 2, wherein: and the first connecting pipeline is also provided with a filtering triplet.

4. The pneumatic quick closing adjustment actuator of claim 1, wherein: and a manual test valve is arranged on the air cylinder.

5. The pneumatic quick closing adjustment actuator of claim 1, wherein: the travel switch comprises a rack and a gear meshed with the rack to form linkage, the gear is connected with a valve rod, one end of the rack is connected with a piston of an air cylinder, and the other end of the rack is connected with a spring cylinder.