CN102297287A

CN102297287A - pneumatic locking device

Info

Publication number: CN102297287A
Application number: CN2011102162399A
Authority: CN
Inventors: 赵俊良; 郭亚; 赵力强; 徐许强
Original assignee: ZHANGJIAGANG SHAZHOU MARINE VALVE MANUFACTURE CO Ltd
Current assignee: ZHANGJIAGANG SHAZHOU MARINE VALVE MANUFACTURE CO Ltd
Priority date: 2011-07-31
Filing date: 2011-07-31
Publication date: 2011-12-28
Anticipated expiration: 2031-07-31
Also published as: CN102297287B

Abstract

The invention discloses a pneumatic locking device, which comprises a front cylinder cover, a rear cylinder cover, a cylinder body, pistons and a piston rod. A partition board is arranged in the cylinder body; the partition board partitions the inside of the cylinder body into a first cavity body and a second cavity body; the pistons comprise a first piston and a second piston; the first piston is arranged in the first cavity body; the second piston is arranged in the second cavity body; the piston rod is sleeved in the cylinder body and serially connects the first piston with the second piston and one end of the piston rod extends outside through penetrating the front cylinder cover; a spring base is arranged on the rear cylinder cover; a return spring is arranged in the spring base; a first air source port, a first air-discharging hole and a first return air inlet which are communicated with the first cavity body are arranged on the cylinder body at the side of the first cavity body; and a second air source port, a second air-discharging hole and a second return air inlet which are communicated with the second cavity body are arranged on the cylinder body at the side of the second cavity body. With the adoption of the pneumatic locking device, the controlling and the locking to a valve-controlled air cylinder can be more stable and reliable.

Description

Pneumatic locking device

Technical field

The present invention relates to a kind of pneumatic locking device.

Background technique

Be used for machinery valve on the particular device (as hull, underwater operation equipment) for some, usually adopt cylinder control to open or close, and valve is after opening or closing, valve need be locked, to prevent valve flip-flop on off state under unexpected situation, and influence the proper functioning of relevant device, even cause personnel and property loss.At present, adopt ordinary cylinder as locking device, this locking device is when locking, need control separately locking device and the valve control cylinder that is used for control valve, required gas piping is more, and can't realize that locking device and valve control cylinder directly link, and need add the control circuit components and parts, make complicated integral structure huge, the manufacture cost height.

Summary of the invention

Technical problem to be solved by this invention is: a kind of directly pneumatic locking device of interlock of itself and valve control cylinder that makes is provided.

For solving the problems of the technologies described above, the technical solution used in the present invention is: pneumatic locking device, comprise front end housing, back cylinder cover, cylinder body, piston, piston rod, be provided with demarcation strip in the described cylinder body, demarcation strip is divided into first cavity and second cavity with cylinder interior, be provided with demarcation strip in the described cylinder body, demarcation strip is divided into first cavity and second cavity with cylinder interior, described front end housing is arranged on first cavity side in the cylinder body, described back cylinder cover is arranged on second cavity side in the cylinder body, described piston comprises first piston, second piston, first piston is movably arranged in first cavity, second piston is movably arranged in second cavity, described piston rod activity is located in the cylinder body passes front end housing with first piston and second piston serial connection and one end and stretches out, described back cylinder cover is provided with spring seat, between the spring seat and second piston, be arranged with return spring on the described piston rod, be provided with the first source of the gas mouth that is communicated with first cavity in first cavity, one side on the cylinder body, first exhaust port and the first return-air mouth, the first source of the gas mouth is positioned on the cylinder body near the front end housing place, first exhaust port is near the demarcation strip place, and the first return-air mouth is apart from the distance of the demarcation strip thickness greater than first piston; Be provided with the second source of the gas mouth, second exhaust port and the second return-air mouth that is communicated with second cavity in second cavity, one side on the cylinder body, the second source of the gas mouth is near the demarcation strip place, second exhaust port is positioned on the cylinder body near the back cylinder cover place, and the second return-air mouth is apart from the distance of the back cylinder cover thickness greater than second piston.

Described cylinder body is provided with the attachment hole that is communicated with first exhaust port and second exhaust port, the first exhaust port outlet port is provided with first one-way valve, the other end of first one-way valve is connected with the first return-air mouth by threeway, the second exhaust port outlet port is provided with second one-way valve, and the other end of second one-way valve is connected with the second return-air mouth by threeway.

Described piston rod tail end passes back cylinder cover and stretches out, and it is provided with emergent handle.

Advantage of the present invention is: because pneumatic locking device of the present invention is provided with two cavitys, and each cavity all is provided with source of the gas mouth and return-air mouth, this pneumatic locking device can directly be linked with valve control cylinder, optimized gas circuit structure greatly, and, do not need the control circuit components and parts, make to make that the more stable work of valve control cylinder is reliable by the relatively simple for structure of the control of valve control cylinder and locking.

Description of drawings

Fig. 1 is a sectional structure schematic representation of the present invention.

Fig. 2 is an A-A broken section structural representation of the present invention.

Fig. 3 is used to control the sectional structure schematic representation of butterfly valve for the present invention.

Fig. 4 is used to control the side-looking structural representation of butterfly valve for the present invention.

Fig. 5 is used to control the plan structure schematic representation of butterfly valve for the present invention.

Among Fig. 1-5: 1. front end housing, 2. back cylinder cover, 3. cylinder body, 4. piston rod, 5. demarcation strip, 6. first cavity, 7. second cavity, 8. first piston, 9. second piston, 10. emergent handle, 11. spring seat, 12. return springs, 13. first source of the gas mouths, 14. first exhaust port, 15. first return-air mouths, 16. second source of the gas mouths, 17. second exhaust port, 18. second return-air mouths, 19. attachment holes, 20. the A chamber, 21.C chamber, 22. B chambeies, 23.D the chamber, 24. first one-way valves, 25. second one-way valves, 26. threeway, 27. rotary cylinder E chambeies, 28. rotary cylinder F chambeies, 29. valve rod, 30. positioning wheels, the piston of 31. rotary cylinders.

Embodiment

Describe particular content of the present invention in detail below in conjunction with the drawings and specific embodiments.

Shown in Fig. 1-5, be the embodiment that the present invention is used for control butterfly switch on the hull, pneumatic locking device, comprise front end housing 1, back cylinder cover 2, cylinder body 3, piston, piston rod 4, be provided with demarcation strip 5 in the described cylinder body 3, demarcation strip 5 is divided into first cavity 6 and second cavity 7 with cylinder interior, described front end housing 1 is arranged on first cavity, 6 one sides in the cylinder body 3, described back cylinder cover 2 is arranged on second cavity, 7 one sides in the cylinder body 3, described piston comprises first piston 8, second piston 9, first piston 8 is movably arranged on (first cavity 6 is divided into A chamber 20 and C chamber 21 by first piston) in first cavity 6, second piston 9 is movably arranged on (second cavity 7 is divided into B chamber 22 and D chamber 23 by second piston 9) in second cavity 7, described piston rod 4 activities are located in the cylinder body 3 passes front end housing 1 with first piston 8 and second piston, 9 serial connections and one end and stretches out, piston rod 4 tail ends pass back cylinder cover 2 and stretch out, and it is provided with emergent handle 10.Described back cylinder cover 2 is provided with spring seat 11, between the spring seat 11 and second piston 9, be arranged with return spring 12 on the described piston rod 4, be provided with the first source of the gas mouth 13, first exhaust port 14 and the first return-air mouth 15 that is communicated with first cavity 6 in first cavity, 6 one sides on the cylinder body 3, the first source of the gas mouth 13 is positioned on the cylinder body 3 near front end housing 1 place, first exhaust port 14 is positioned on the cylinder body 3 near demarcation strip 5 places, and the first return-air mouth 15 is apart from the distance of demarcation strip 5 thickness greater than first piston 8; Be provided with the second source of the gas mouth 16, second exhaust port 17 and the second return-air mouth 18 that is communicated with second cavity 7 in second cavity, 7 one sides on the cylinder body 3, the second source of the gas mouth 16 is near demarcation strip 5 places, second exhaust port 17 is near back cylinder cover 2 places, and the second return-air mouth 18 is apart from the distance of back cylinder cover 2 thickness greater than second piston 9.

Described cylinder body 3 is provided with the attachment hole 19 that is communicated with first exhaust port 14 and second exhaust port 17, first exhaust port, 14 outlet ports are provided with first one-way valve 24, the other end of first one-way valve 24 is connected with the first return-air mouth 15 by threeway 26, the other end that second exhaust port, 17 outlet ports are provided with second one-way valve, 25, the second one-way valves 25 is connected with the second return-air mouth 18 by threeway 26.

The threeway 26 in the first return-air mouth, 15 outlet ports connects the suction port in the rotary cylinder F chamber 28 that drives controlled butterfly valve, the threeway 26 in the second return-air mouth, 18 outlet ports connects the suction port in the rotary cylinder E chamber 27 that drives controlled butterfly valve, the valve rod 29 of controlled butterfly valve passes rotary cylinder, its top is provided with positioning wheel 30, and positioning wheel 30 is provided with to be opened locking slot and close locking slot.

The working procedure that butterfly valve cuts out is:

16 ventilations of the second source of the gas mouth, second piston 9 drives piston rod 4 and moves to back cylinder cover 2 places.

Before the first source of the gas mouth 13 and the first return-air mouth 15, the second source of the gas mouth 16 and the second return-air mouth 18 were communicated with, the gas in A chamber 20, the B chamber 22 entered butterfly valve rotary cylinder F chamber 28 by first one-way valve 24 and second one-way valve 25 and realizes exhausts (this moment rotary cylinder F chamber 28 with atmosphere communicate by the supervisory control desk solenoid valve).Still before the access failure, finish the release action at the second source of the gas mouth 16 and the second return-air mouth 18.

Piston rod 4 continues to move to the first source of the

gas mouth

13 and 15 connections of the first return-air mouth to back cylinder cover 2 places, when the second source of the gas mouth 16 and the second return-air mouth 18 are communicated with, the gas source of the second source of the gas mouth 16 enters rotary cylinder E chamber 27 by the second return-air mouth 18, thereby piston 31 works done that promote rotary cylinder are rotated the valve rod 29 of controlled butterfly valve and closed butterfly valve.The gas in A chamber 20, B chamber 22 is discharged through the first source of the gas mouth 13 from the first return-air mouth 15 by first exhaust port 14 and second one-way valve 25.

After butterfly valve cuts out and puts in place, source of the gas stops air feed, the gas in rotary cylinder E chamber 27 is discharged from the second source of the gas mouth 16 through the second return-air mouth 18 and D chamber 23, when the pressure in D chamber 23 is decreased to A chamber 20, B chamber 22 gas pressures and spring force sum gradually, piston relies on spring force to promote to move to front end housing 1 place, until the sealing second return-air mouth 18, piston continues to move to piston rod 4 to front end housing 1 place and closes locking slot to the positioning wheel 30, realizes locking.

The working procedure that butterfly valve is opened is:

13 ventilations of the first source of the gas mouth, first piston 8 drives piston rod 4 and moves to back cylinder cover 2 places.

Before the first source of the gas mouth 13 and the first return-air mouth 15, the second source of the gas mouth 16 and the second return-air mouth 18 were communicated with, the gas in A chamber 20, the B chamber 22 entered butterfly valve rotary cylinder E chamber 27 by first one-way valve 24 and second one-way valve 25 and realizes exhausts (this moment rotary cylinder E chamber 27 with atmosphere communicate by the supervisory control desk solenoid valve).Still before the access failure, finish the release action at the first source of the gas mouth 13 and the first return-air mouth 15.

Piston rod 4 continues to move to the first source of the

gas mouth

13 and 15 connections of the first return-air mouth to back cylinder cover 2 places, when the second source of the gas mouth 16 and the second return-air mouth 18 are communicated with, the gas source of the first source of the gas mouth 13 enters rotary cylinder F chamber 28 by the second return-air mouth 15, thereby valve rod 29 opened butterfly valves of controlled butterfly valve are rotated in piston 31 works done of promotion rotary cylinder.Gas in A chamber 20, the B chamber 22 is discharged through the second source of the gas mouth 16 from the second return-air mouth 18 by second exhaust port 17 and first one-way valve 24.

After butterfly valve is opened and is put in place, source of the gas stops air feed, the gas in rotary cylinder F chamber 28 is discharged from the first source of the gas mouth 13 through the first return-air mouth 15 and C chamber 21, when the pressure in C chamber 21 be decreased to gradually with A chamber 20, B chamber 22 in gas pressure and during the spring force sum, piston relies on spring force to promote to move to front end housing 1 place, until the sealing first return-air mouth 15, piston continues to move to piston rod 4 to front end housing 1 place and closes locking slot to the positioning wheel 30, realizes locking.

Can't air feed or during other urgencies, the handle 10 of will meeting an urgent need outwards stretches, and gets final product release when source of the gas takes place.

Claims

1. pneumatic locking device, comprise front end housing, back cylinder cover, cylinder body, piston, piston rod, it is characterized in that: be provided with demarcation strip in the described cylinder body, demarcation strip is divided into first cavity and second cavity with cylinder interior, described front end housing is arranged on first cavity side in the cylinder body, described back cylinder cover is arranged on second cavity side in the cylinder body, described piston comprises first piston, second piston, first piston is movably arranged in first cavity, second piston is movably arranged in second cavity, described piston rod activity is located in the cylinder body passes front end housing with first piston and second piston serial connection and one end and stretches out, described back cylinder cover is provided with spring seat, between the spring seat and second piston, be arranged with return spring on the described piston rod, be provided with the first source of the gas mouth that is communicated with first cavity in first cavity, one side on the cylinder body, first exhaust port and the first return-air mouth, the first source of the gas mouth is positioned on the cylinder body near the front end housing place, first exhaust port is near the demarcation strip place, and the first return-air mouth is apart from the distance of the demarcation strip thickness greater than first piston; Be provided with the second source of the gas mouth, second exhaust port and the second return-air mouth that is communicated with second cavity in second cavity, one side on the cylinder body, the second source of the gas mouth is near the demarcation strip place, second exhaust port is positioned on the cylinder body near the back cylinder cover place, and the second return-air mouth is apart from the distance of the back cylinder cover thickness greater than second piston.

2. pneumatic locking device as claimed in claim 1, it is characterized in that: described cylinder body is provided with the attachment hole that is communicated with first exhaust port and second exhaust port, the first exhaust port outlet port is provided with first one-way valve, the other end of first one-way valve is connected with the first return-air mouth by threeway, the second exhaust port outlet port is provided with second one-way valve, and the other end of second one-way valve is connected with the second return-air mouth by threeway.

3. pneumatic locking device as claimed in claim 1 is characterized in that: described piston rod tail end passes back cylinder cover and stretches out, and it is provided with emergent handle.