CN103307296A

CN103307296A - Electric orifice valve

Info

Publication number: CN103307296A
Application number: CN2012100674791A
Authority: CN
Inventors: 郑敬鹤; 徐文毅
Original assignee: Wuxi Dongfang Industrial Environmental Protection Co Ltd
Current assignee: WUXI DongFang Environmental Engineering Design Institute Co.,Ltd.
Priority date: 2012-03-15
Filing date: 2012-03-15
Publication date: 2013-09-18
Anticipated expiration: 2032-03-15
Also published as: CN103307296B

Abstract

The invention relates to an electric orifice valve which consists of an upper valve body 1, a lower valve body 2, a valve plate 3, a pressing device 4, a transmission, a control device and a driving motor. The upper and lower valve bodies are respectively provided with an inlet pipe 6 and an outlet pipe 7; the valve plate 3 is provided with a through hole; when the valve plate linearly moves to the through hole to be communicated with the inlet and outlet pipes, the valve is opened; the design implements the advantages of smoothness and no bulge of an inner passage of the valve in a knife gate valve mode; the cross section of the valve plate is of an n shape; both sides of the bottom of the valve plate are of a rack structure; racks are meshed with a transmission gear 11 to implement the linear movement of the valve plate; the valve plate not only is an on-off part, but also is a transmission part; planes between the racks of the valve plate are positioned on the outlet pipe 7; the valve plate is in a floating state; the valve plate is firmly pressed on the outlet pipe 7 by the pressing device 4, so that the valve is guaranteed to have a good sealing effect when being closed. The electric orifice valve has high transmission efficiency and good sealing performance, is reliable to operate and is very suitable for a pneumatic transmission system.

Description

Electronic orifice valve

Technical field

The present invention is a kind of electronic orifice valve, is particularly useful for air-transport system and other occasion high to seal request.

Background technique

At present, the flashboard of common knife gate valve is solid slab, and channel cross-section has sudden change during valve open, easy dust stratification in the passage.Adopt the mechanical device such as locating stud to be connected between flashboard and the driving mechanism, in transmission process, can't guarantee the flashboard straight line motion, cause the shortcomings such as transmission is not steady, transmission efficiency is low; The sealing of valve presses to valve seat by the wedge briquetting by force with flashboard, owing to the situation that the wearing and tearing of wedge briquetting and wedge briquetting and valve seat gap are stopped up inevitably can occur in running, its sealing reliability is low, poor sealing performance.

Summary of the invention

The invention provides a kind of electronic orifice valve, when this electronic orifice valve was in the enable possition, the inner passage was smooth without sudden change, dust stratification not; When in the closed position, good sealing effect; Rack structure is arranged at its valve plate bottom, tooth bar and driving gear engagement realization valve plate linear movement, stable drive, efficient are high, valve plate be the break-make part be again driving component.This electronic orifice valve adopts mechanical spring formula hold down gag to guarantee its sealing effect, and its compression degree can regulate, and has thoroughly solved the defective that conventional seals exists.

The present invention adopt technological scheme be: a kind of electronic orifice valve mainly is comprised of upper valve body, lower valve body, valve plate, hold down gag, transmission device, control gear and drive motor.Described upper valve body is provided with inlet tube; Described lower valve body is provided with outer pipe and two valve plate guide rails; Described valve plate be the break-make part be again driving component, have through hole on its plane, the transverse section is " inverted concave ", two bottom sides is rack structure; Described hold down gag is mechanical spring formula structural type; Described transmission device comprises that one group of worm and gear, a pair of small gear and level pass the transmission shaft of lower valve body and guide rail, and worm gear and small gear are installed on the transmission shaft, small gear separation guide rail both sides; Described control gear comprises approach switch and limit induction piece; The axle of described drive motor combines as a whole by key and worm screw.

During valve event, the motor direct-drive worm screw, driving force is delivered on the valve plate tooth bar via worm screw, worm gear, transmission shaft, small gear and drives valve plate and do straight line motion.When inlet/outlet pipe and valve plate through hole connected fully, approach switch moved after receiving the signal that the transmission of limit induction piece comes, and motor stops operating, the valve plate stop motion, and valve is in " reaching the position " state, and is at this moment, smooth without sudden change in the whole transfer passage; When valve plate inverted running to valve plate through hole and inlet/outlet pipe misplaced fully, approach switch received signalizing activity, motor stalling, valve is in " pass puts in place " state, at this moment, hold down gag fastens valve plate on outer pipe, guarantees that valve has good sealing effect.

The invention has the beneficial effects as follows, the inner passage abrupt change of cross-section when having overcome the common knife gate valve and opening, the easy shortcoming such as dust stratification can normally be moved for a long time, good sealing effect, and driving mechanism stable drive, transmission efficiency are high.

Description of drawings

Fig. 1 is electronic orifice valve sectional view when closing;

Sectional view when Fig. 2 is electronic orifice valve unlatching;

Fig. 3 is electronic orifice valve left view;

Fig. 4 is the hold down gag erection drawing;

2. times valve bodies of 1. upper valve bodies, 3. valve plates, 4. hold down gags, 5 drive motor .6. inlet tubes, 7. outer pipes, 8. guide rails, 9. worm gears, 10. worm screws, 11. small gears, 12. transmission shafts, 13. approach switchs, 14. limit induction pieces 15. are regulated pressure cap 16. spring seats 17. Compress Springs 18. locking nuts 19. pressure heads among the figure

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

Such as Fig. 1, Fig. 2, shown in Figure 3, a kind of electronic orifice valve mainly is comprised of upper valve body 1, lower valve body 2, valve plate 3, hold down gag 4, transmission device, control gear and drive motor 5;

Upper valve body 1, lower valve body 2 connect as a whole by bolt assembly, the sealing of valve body realizes by lock bolt by adding sealing gasket between valve body up and down.

Valve plate 3 be the break-make part be again driving component, have through hole on its plane, clear size of opening and upper valve body inlet tube 6, lower valve outlet pipe 7 are measure-alike.Valve plate 3 transverse section are " inverted concave ", and two bottom sides is rack structure, and valve plate 3 lower surfaces contact firmly with outer pipe 7 upper surfaces.

Transmission device comprises one group of worm gear, 9 worm screws 10, a pair of small gear 11 and a transmission shaft 12.Worm gear 9 and a pair of small gear 11 are installed on the transmission shaft 12, and transmission shaft 12 levels are passed lower valve body 2 and guide rail 8, and small gear 11 separation guide rails 8 both sides are with valve plate 3 both sides tooth bar engagements.Worm screw 10 at right angle settings are on lower valve body 2, with worm gear 9 engagements.

Control gear comprises approach switch 13 and limit induction piece 14.

Drive motor 5 is installed on the upper valve body 1, and motor shaft combines as a whole by key and worm screw 10.Drive motor 5 drives worm screws 10 and rotates, and worm screw 10 drives two small gears 11 and rotates synchronously by worm gear 9, transmission shaft 12, advances or retreats at guide rail 8 thereby drive tooth-like valve plate 3, and valve plate 3 becomes driving component participation transmission.

In the embodiment shown in fig. 1, when valve plate 3 inverted runnings to valve plate through hole and inlet tube 6, when outer pipe 7 misplaces fully, approach switch 13 obtains signal, motor 5 shuts down, valve plate 3 is out of service, and valve is in " pass puts in place " state, at this moment, hold down gag 4 fastens valve plate 3 on outer pipe 7, guarantees that valve has good sealability.

In embodiment illustrated in fig. 2, when valve plate 3 move to through hole and inlet tube 6, when outer pipe 7 connects fully, the approach switch 13 that is installed on the lower valve body 2 obtains the signal that the limit induction piece 14 on the valve plate 3 sends, motor 5 shuts down, valve plate 3 is out of service, and valve is in " reaching the position " state, at this moment, smooth without sudden change in the whole transfer passage, be difficult for dust stratification.

As shown in Figure 4, hold down gag 4 is mechanical type compressing device, forms by regulating pressure cap 15, spring seat 16, Compress Spring 17, locking nut 18 and pressure head 19; Spring seat 16 is " T " shape, is installed in upper valve body 1 through hole, and its outside is screw thread, and the centre is step through-hole; Compress Spring 17 and pressure head 19 all place in the spring seat intermediate throughholes, guarantee that pressure head 19 is pressed onto the upper surface of valve plate 3; Regulating pressure cap 15 is I.S.S, is threaded onto on the spring seat 16, is used for regulating the compression degree of Compress Spring 17, and whole spring seat 16 is by locking nut 18 lockings.This design guarantees no matter when valve plate 3 all closely fastens with outer pipe 7, and valve has good sealing effect; Valve plate 3 lower surfaces and outer pipe 7 upper surfaces are finish surface, so valve plate 3 is when fastening operation with outer pipe 7, and surface friction drag is less, and drive motor 5 is low-power machine.

Claims

1. an electronic orifice valve mainly is comprised of upper valve body, lower valve body, valve plate, hold down gag, transmission device, control gear and drive motor, and it is characterized in that: upper and lower valve body is respectively equipped with the inlet/outlet pipe; Valve plate be the break-make part be again driving component, have the through hole measure-alike with the inlet/outlet pipe on its plane, the transverse section is " inverted concave ", two bottom sides is rack structure, the engagement of tooth bar and driving gear realizes the linearly operating of valve plate; Hold down gag fastens valve plate on outer pipe, and good sealing effect is arranged when guaranteeing valve closing.

2. electronic orifice valve according to claim 1 is characterized in that hold down gag is mechanical spring formula hold down gag, and its compression degree can be regulated.