CN212131480U

CN212131480U - Pneumatic actuator of pneumatic valve

Info

Publication number: CN212131480U
Application number: CN202020745063.0U
Authority: CN
Inventors: 张朋; 张鹏杰; 王铮; 邓毕力; 毛明家; 郭珍洁
Original assignee: Fuyang Normal University
Current assignee: Fuyang Normal University
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-12-11
Anticipated expiration: 2030-05-08

Abstract

The utility model discloses a pneumatic actuator of pneumatic valve, its characterized in that: the lower end of the upper flow tube is inserted into the connecting sleeve, the upper end of the lower flow tube is inserted into the connecting sleeve, the lower part of the upper flow tube is uniformly distributed with upper through holes, the upper part of the lower flow tube is uniformly distributed with lower through holes, the diameters of the upper flow tube and the lower flow tube are communicated, a steel ball is arranged in the connecting sleeve, the steel ball is positioned in a gap between the upper flow tube and the lower flow tube, be equipped with the piston chamber in the cylinder liner, the front end in piston chamber is connected with the piston rod, and the front end of piston rod stretches out from the front end of cylinder liner, and the side is fixed with air business turn over pipe, oil business turn over pipe respectively around the cylinder liner, and air business turn over pipe, oil business turn over pipe all communicate with each other with the piston chamber, and oil business turn over pipe is connected with the lower extreme of down the draught tube through oil pipe, and the upper end of going up the draught tube is connected with the oil storage tank through oil pipe, the utility model discloses the realization is to the control of valve opening and close speed to ensure the stability and the security.

Description

Pneumatic actuator of pneumatic valve

Technical Field

The utility model belongs to the technical field of the fluid transport, concretely relates to pneumatic actuator of pneumatic valve.

Background

The valve is widely applied to the production fields of petroleum, chemical industry, metallurgy, electric power, water treatment and the like, and is mainly used for controlling the on-off of fluid. The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. The cut-off valve is used for controlling the on-off of fluid, and most of cut-off valves in the market at present adopt a pneumatic mode to control the on-off of the valve. The existing pneumatic stop valve does not have the function of controlling the opening and closing speed, and when a system is started and a valve is opened, because the opening speed is too high, the pressure fluctuation of a pipeline system is large, the safe operation of the system is not facilitated, and the front part of the stop valve is often required to be provided with a regulating valve for matching use. When the valve is closed, because the closing speed of the valve is low, when an emergency situation occurs, the quick action of the cut-off valve is needed to avoid safety accidents. In view of the above, there is an urgent need to design a new pneumatic mechanism for a shut-off valve so as to overcome the defects of the existing pneumatic mechanism.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a pneumatic actuator of pneumatic valve.

The pneumatic actuating mechanism of the pneumatic valve comprises a flow control mechanism and a cylinder sleeve, and is characterized in that: the flow control mechanism comprises an upper flow pipe, a connecting sleeve, a steel ball and a lower flow pipe, wherein the lower end of the upper flow pipe is inserted into the connecting sleeve, the upper end of the lower flow pipe is inserted into the connecting sleeve, the lower part of the upper flow pipe is uniformly provided with an upper through hole, the sum of the flow areas of the upper through hole is smaller than the flow area of the upper flow pipe, the upper part of the lower flow pipe is uniformly provided with a lower through hole, the sum of the flow areas of the lower through hole is larger than the flow area of the lower flow pipe, the pipe diameters of the upper flow pipe and the lower flow pipe are communicated, the connecting sleeve is internally provided with the steel ball, the steel ball is positioned in the gap between the upper flow pipe and the lower flow pipe, the steel ball is matched with the lower end of the upper flow pipe and the upper end of the lower flow pipe, a piston cavity is arranged in the cylinder sleeve, the front end of the piston cavity is connected with, an air inlet and outlet pipe and an oil inlet and outlet pipe are respectively fixed on the front side and the rear side of the cylinder sleeve, the air inlet and outlet pipe and the oil inlet and outlet pipe are communicated with the piston cavity, the oil inlet and outlet pipe is connected with the lower end of the lower flow-through pipe through an oil pipe, and the upper end of the upper flow-through pipe is connected with an oil storage tank through an oil pipe.

Preferably, the upper part of the oil storage tank is provided with a compressed air pipe.

Preferably, the air inlet and outlet pipe is connected with a three-way valve through a pipeline, and the other two interfaces of the three-way valve are respectively communicated with a compressed air system and the atmosphere.

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

the utility model discloses when using, be applicable to the start and stop of pneumatic trip valve, but when needing to open the valve, inject compressed air into the front end in the piston chamber of cylinder liner through the three-way valve, at this moment, the rear portion in piston chamber is full of hydraulic oil, press night oil to get into in the adapter sleeve through oil business turn over pipe, oil jacks up the steel ball, the steel ball pushes up tightly on the mouth of pipe of last through-flow pipe under the effect of oil pressure, hydraulic oil flows out from the last through-flow hole on the last through-flow pipe, the area of last through-flow hole is less, thereby realize the slow inflow of hydraulic oil in the oil storage tank, the piston rod slowly contracts, realize the slow opening; when the valve needs to be closed, the three-way valve cuts off a passage with the compressed air system, the passage to the atmosphere is opened, compressed air in the front part of the piston cavity is discharged into the atmosphere, compressed air is injected into the oil storage tank through the compressed air pipe, hydraulic oil in the oil storage tank rapidly enters the rear end of the piston cavity, the piston rod is rapidly stretched out, and therefore rapid cut-off of the valve is achieved. The utility model discloses a set up flow control mechanism control hydraulic oil flow, realize the control to the valve speed of opening and close to ensure the stability and the security of pipe-line system operation.

Drawings

Fig. 1 is a schematic structural diagram of a pneumatic actuator of the pneumatic valve of the present invention.

Fig. 2 is a schematic structural diagram of the flow control mechanism of the present invention.

In the figure, 1, a compressed air pipe, 2, an oil storage tank, 3, a flow control mechanism, 4, an oil inlet and outlet pipe, 5, a cylinder sleeve, 6, a piston, 7, a piston rod, 8, a three-way valve, 9, an air inlet and outlet pipe, 301, an upper draft pipe, 302, a connecting sleeve, 303, a steel ball, 304 and a lower draft pipe.

Detailed Description

Referring to fig. 1 and 2, the pneumatic actuator of the pneumatic valve comprises a flow control mechanism 3 and a cylinder sleeve 5, and is characterized in that: flow control mechanism 3 comprises last flow tube 301, adapter sleeve 302, steel ball 303, lower flow tube 304, go up flow tube 301's lower extreme and insert in adapter sleeve 302, the upper end of flow tube 304 inserts in adapter sleeve 302 down, it has last through-flow hole to go up flow tube 301 lower part equipartition, and the area sum of the through-flow of going up the through-flow hole is less than the area of the through-flow of last flow tube 301, the area sum of the through-flow of lower through-flow hole is greater than the area of the through-flow of lower flow tube 304, the pipe diameter of going up flow tube 301 and lower flow tube 304 communicates with each other, be equipped with steel ball 303 in the adapter sleeve 302, steel ball 303 is arranged in the clearance between flow tube 301, lower flow tube 304, the lower extreme of steel ball 303 and last flow tube 301, the upper end looks adaptation of lower flow tube 304, be equipped with the piston chamber in the cylinder liner 5, the front end in piston chamber is connected with piston rod 7, the front end of the piston rod 7 extends out of the front end of the cylinder sleeve 5, an air inlet and outlet pipe 9 and an oil inlet and outlet pipe 4 are fixed on the front side and the rear side of the cylinder sleeve 5 respectively, the air inlet and outlet pipe 9 and the oil inlet and outlet pipe 4 are communicated with the piston cavity, the oil inlet and outlet pipe 4 is connected with the lower end of the lower draft pipe 304 through an oil pipe, and the upper end of the upper draft pipe 301 is connected with the oil storage tank 2 through an oil pipe.

And a compressed air pipe 1 is arranged at the upper part of the oil storage tank 2.

The air inlet and outlet pipe 9 is connected with a three-way valve 8 through a pipeline, and the other two interfaces of the three-way valve 8 are respectively communicated with a compressed air system and the atmosphere.

The utility model discloses a theory of operation is:

the utility model discloses when using, be applicable to the start and stop of pneumatic trip valve, but when needing to open the valve, inject compressed air into the front end in the piston chamber of cylinder liner 5 through three-way valve 8, at this moment, the rear portion in piston chamber is full of hydraulic oil, press night oil to get into connecting sleeve 302 through oil business turn over pipe 4, oil jacks up steel ball 303, steel ball 303 jacks up tightly on the mouth of pipe of last through-flow pipe 301 under the effect of oil pressure, hydraulic oil flows out from the last through-flow hole on last through-flow pipe 301, the area of last through-flow hole is less, thereby realize that hydraulic oil flows into oil storage tank 2 slowly, piston rod 7 slowly contracts, realize slowly opening of valve; when the valve needs to be closed, the three-way valve 8 cuts off a passage with a compressed air system, the passage to the atmosphere is opened, compressed air in the front part of the piston cavity is discharged into the atmosphere, compressed air is injected into the oil storage tank 2 through the compressed air pipe 1, hydraulic oil in the oil storage tank 2 rapidly enters the rear end of the piston cavity, the piston rod 7 is rapidly extended out, and therefore rapid cut-off of the valve is achieved. The utility model discloses a set up 3 control hydraulic oil flow of flow control mechanism, realize the control to the valve speed of opening and close to ensure the stability and the security of pipe-line system operation.

The technical solution of the present invention is to provide an improved method for manufacturing a semiconductor device, which is characterized in that the method is not limited by the above-mentioned method, and the method is not substantially improved by the method and the device, or the method and the device are directly applied to other occasions without improvement, all within the protection scope of the present invention.

Claims

1. The pneumatic actuating mechanism of the pneumatic valve comprises a flow control mechanism (3) and a cylinder sleeve (5), and is characterized in that: flow control mechanism (3) comprises last flow tube (301), adapter sleeve (302), steel ball (303), lower flow tube (304), go up the lower extreme of flow tube (301) and insert adapter sleeve (302) in, the upper end of lower flow tube (304) is inserted in adapter sleeve (302), it has last through-flow hole to go up flow tube (301) lower part equipartition, and the sum of the through-flow area of going up through-flow hole is less than flow area of last flow tube (301), lower flow tube (304) upper portion equipartition has down through-flow hole, and the sum of the through-flow area of lower through-flow hole is greater than the through-flow area of lower flow tube (304), the pipe diameters of going up flow tube (301) and lower flow tube (304) communicate with each other, be equipped with steel ball (303) in adapter sleeve (302), steel ball (303) are located the clearance between last flow tube (301), lower flow tube (304), steel ball (303) and the lower extreme of last flow tube (301), The upper end looks adaptation of down draught tube (304), be equipped with the piston chamber in cylinder liner (5), the front end in piston chamber is connected with piston rod (7), the front end of piston rod (7) stretches out from the front end of cylinder liner (5), the front and back side of cylinder liner (5) is fixed with air inlet and outlet pipe (9), oil inlet and outlet pipe (4) respectively, air inlet and outlet pipe (9), oil inlet and outlet pipe (4) all communicate with each other with the piston chamber, oil inlet and outlet pipe (4) are connected with the lower extreme of down draught tube (304) through oil pipe, the upper end of going up draught tube (301) is connected with oil storage tank (2) through oil pipe.

2. A pneumatic actuator for a pneumatic valve as set forth in claim 1, wherein: and a compressed air pipe (1) is arranged at the upper part of the oil storage tank (2).

3. A pneumatic actuator for a pneumatic valve as set forth in claim 1, wherein: the air inlet and outlet pipe (9) is connected with a three-way valve (8) through a pipeline, and the other two interfaces of the three-way valve (8) are respectively communicated with a compressed air system and the atmosphere.