CN101813213A

CN101813213A - Self-cleaning type baiting valve

Info

Publication number: CN101813213A
Application number: CN 201010162451
Authority: CN
Inventors: 周永国
Original assignee: Chongqing Hualin Auto-control Instrument Co Ltd
Current assignee: Chongqing Hualin Auto-control Instrument Co Ltd
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2010-08-25
Anticipated expiration: 2030-04-30
Also published as: CN101813213B

Abstract

The invention discloses a self-cleaning type baiting valve, which comprises a valve body, a valve base, a valve rod, a valve core and an actuating mechanism, wherein a hollow cavity in the middle of the valve body is a valve cavity; the valve core connected with the valve rod is arranged in the valve cavity; and the valve rod drives the valve core to move up and down under the action of the reciprocation of the actuating mechanism. The self-cleaning type baiting valve is characterized in that: an air cylinder of the actuating mechanism is arranged in the valve body and connected together with the valve core, and a piston of the actuating mechanism drives the valve core to move up and down; an exhaust port of the actuating mechanism is connected with a blowing port through a pipeline; and the blowing port is formed on the valve base and faces the sealing surface of the valve base. In the invention, the air cylinder body of the actuating mechanism is arranged in the cavity of the valve body and the piston pushrod (valve rod) is connected with the valve core, so the structure of baiting valve is simpler and compacter; the air exhausted by the air cylinder blows the sealing surface of the valve base through the blowing port to remove material particles which remain on the sealing surface, so the sealing surface is kept clean, avoids material accumulation and has the self-cleaning ability; and a feedback shaft can display the opening and closing states of the valve, and thus, operation and control of an operator are convenient.

Description

A kind of self-cleaning type baiting valve

Technical field

The present invention relates to a kind of valve that material passes through of controlling, especially have the self-cleaning type baiting valve of self-cleaning ability.

Background technique

In the discharging valve of control material turnover, it generally all is motion by the actuating mechanism controls valve rod, stem movement drives valve core movement, make spool shutoff material feeding mouth (spool is fitted fully, closely contacted with the sealing surface of valve seat) and closing valve, make valve be in closed condition, material can not pass through material feeding mouth; Otherwise when valve core movement to and valve seat between produce the slit, just opened valve, material just can pass through material feeding mouth.The discharging valve of prior art has 3 deficiencies on its structure, and the one, actuator is arranged in the valve body outside, and actuator links to each other with valve rod by crank, by crank-swinging traction valve core movement, has increased the overall dimensions of discharging valve, and overall structure is not compact; The 2nd, owing to always there is material particles to assemble or stick on the sealing surface of spool or valve seat, spool and valve seat can not be sealed fully, leave either large or small slit, valve closing is not tight to cause leakage; Waste time and energy again with the residual material particle that manual type is cleared up on the valve core sealed cover on time, increased cost; The 3rd, spool is in valve inner, be difficult at ordinary times see, can not accurately know the position of spool in valve body during operation, operator can only operate with sensation or experience, be easy to generate misoperation, associated components is collided, sealing surface is damaged etc., shorten its operating life, or increase its maintenance cost.

Summary of the invention

The present invention is directed to the above-mentioned deficiency of the discharging valve of prior art, a kind of compact structure is provided, has self-cleaning ability, spool can be in position in the valve pocket and accurately reflects self-cleaning type baiting valve with easy-to-operat and control.

Technological scheme of the present invention: a kind of self-cleaning type baiting valve, comprise valve body, valve seat, valve rod, spool and actuator, cavity in the middle of the valve body is a valve pocket, and the spool that is connected with the actuator push rod is arranged in the valve pocket, and spool is switch valve under the to-and-fro motion of actuator's piston; It is characterized in that: the cylinder block of described actuator places valve inner, and actuator's push rod is provided with cleverly with valve rod, and the to-and-fro motion of actuator's piston drives spool and moves up and down, and valve seat is arranged on material feeding mouth, is fixed together with valve body.

Further feature is: the relief opening of carrying out cylinder is connected to the purging mouth by pipeline, purges mouth and is arranged on the valve seat, purges mouth and faces toward sealing surface of seat.

On valve rod (piston push rod) tooth bar is set, gear is arranged on the resetting shaft of lateral arrangement, and resetting shaft send device to be connected with the valve position change, reaches the on off state of feedback valve by the cooperation of wheel and rack.

Self-cleaning type baiting valve of the present invention has following advantage:

1, the cylinder block with actuator is arranged in the body cavity, piston push rod (valve rod) links to each other with spool, and unlike conventional discharging valve, actuator is placed on the valve pocket outside, and actuator links to each other with valve rod by crank, and this discharging valve structure is simpler, compacter;

2, the gas that cylinder is discharged is by the sealing station of line transportation to valve seat and spool, purge mouth facing to sealing surface of seat, the gas purging valve seat sealing surface that utilizes cylinder to discharge blows the material particles that remains on the sealing surface off, make sealing surface keep clean, no backup, have self-cleaning ability;

3, during reciprocating motion of the pistons, the push rod that connects piston can drive resetting shaft and rotate, and resetting shaft send device to be connected by becoming with valve position, and the on off state of demonstration valve helps operator's operation and control.

Description of drawings

Fig. 1 is a discharging valve structure sectional view of the present invention;

Fig. 2 is a discharging valve structure plan view of the present invention (partly cuing open).

Embodiment

In Fig. 1, self-cleaning type baiting valve of the present invention, comprise valve body 1, valve seat 2, valve rod 3, spool 4 and actuator, actuator comprises piston, piston push rod, cylinder etc., cavity in the middle of the valve body 1 is a valve pocket 9, the spool 4 that is connected with valve rod 3 is arranged in the valve pocket 9, valve rod 3 drives spool 4 and moves up and down under actuator's reciprocating motion of the pistons, when the sealing surface of seat 6 of the sealing surface 5 of spool 4 and valve seat 2 fits tightly, spool 4 with regard to shutoff the opening of valve body 1, material can not be carried, from opening when between the sealing surface of seat 6 of the valve core sealed cover 5 of spool 4 and valve seat 2 appropriate clearance being arranged, material just can pass through this gap, carries from opening.

Improvement of the present invention is that the cylinder in the actuator 7 is arranged in the valve body 1, and the piston push rod of actuator and valve rod 3 are one altogether, and links together with spool 4, and actuator's piston 8 drives spool 4 and moves up and down; Should consider the steady and symmetrical of spool 4 when specifically being provided with, make piston 8 and the spool 4 can upper and lower reposefully motion, actuator's piston 8 be dynamical elements that spool 4 moves up and down.

The relief opening of cylinder 7 is connected to by pipeline and purges mouth 15, purging mouth 15 is arranged on valve seat 1 or spool 4 or the valve rod 3, purge mouthfuls 15 facing to or face valve core sealed cover 5 and/or sealing surface of seat 6, when cylinder 7 exhausts, the gas of discharging blows on valve core sealed cover 5 and/or sealing surface of seat 6 by purging mouth 15, to remain in that material particles blows off on valve core sealed cover 5 and/or the sealing surface of seat 6, and make valve core sealed cover or sealing surface of seat keep clean, have self-cleaning ability.Structure shown in the accompanying drawing is to purge mouth 15 to be arranged on the valve seat 1, carries out exhaust facing to valve core sealed cover 5, blows on valve core sealed cover 5, blows the material particles on the valve core sealed cover 5 off, realizes the self-cleaning function of valve body of the present invention.

In Fig. 2, because spool 4 of the present invention is arranged in the valve pocket 9, the operator is not easy to grasp the position of spool 4, is not easy to control and operation; The present invention is provided with tooth bar 10 on valve rod 3, matching with tooth bar 10 is provided with gear 11, and gear 11 is arranged on the resetting shaft 12 of lateral arrangement, and resetting shaft 12 send device to be connected with the valve position change; When valve rod 3 moves up and down at the piston 8 of actuator, by the engagement of tooth bar 10 with gear 11, driving resetting shaft 12 rotates, the motion feedback of valve rod 3 become to valve position send device, the position of directly or indirectly representing spool 4, make the operator become the position send device according to valve position, in the control room or on-the-spotly just can make things convenient for the position of grasping spool 4 easily, the control and operating of being more convenient for.

Claims

1. self-cleaning type baiting valve, comprise valve body (1), valve seat (2), valve rod (3), spool (4) and actuator, cavity in the middle of the valve body (1) is valve pocket (9), the spool (4) that is connected with valve rod (3) is arranged in the valve pocket (9), and valve rod (3) drives spool (4) and moves up and down under the to-and-fro motion of actuator; It is characterized in that: the cylinder of described actuator (7) is arranged in the valve body (1) and links together with spool (4), and actuator's piston (8) drives spool (4) and moves up and down.

2. self-cleaning type baiting valve according to claim 1, it is characterized in that: the relief opening of cylinder (7) is connected to by pipeline and purges mouthful (15), purge mouthful (15) and be arranged on valve seat (1) or spool (4) or the valve rod (3), purge mouthful (15) facing to valve core sealed cover (5) and/or sealing surface of seat (6).

3. self-cleaning type baiting valve according to claim 1 and 2, it is characterized in that: tooth bar (10) is set on valve rod (3), gear (11) is set matches with tooth bar (10), gear (11) is arranged on the resetting shaft (12) of lateral arrangement, and resetting shaft (12) send device to be connected with the valve position change.