CN202790588U

CN202790588U - Buffering type waterproof hammer valve

Info

Publication number: CN202790588U
Application number: CN 201220499289
Authority: CN
Inventors: 周章添
Original assignee: Zhejiang Industry and Trade Vocational College
Current assignee: Zhejiang Industry and Trade Vocational College
Priority date: 2012-09-19
Filing date: 2012-09-19
Publication date: 2013-03-13
Anticipated expiration: 2022-09-19

Abstract

The utility model discloses a buffering type waterproof hammer valve which is composed of a valve body, a valve clack, a valve cover, a valve rod, a sealing body, a spring and a piston. A cylindrical inner cavity is formed in the valve clack. The spring is installed in the inner cavity. The front end of the valve rod is provided with the piston. The spring is pushed by the piston to stretch in the inner cavity. When the valve is opened, the valve clack is pushed through the pressure of a medium to move upward. The spring is stressed and compressed, and a push force is produced. The medium passes through the sealing body and slowly flows to an outlet end. A valve port is opened slowly, and the pressure of the medium is buffered by the reaction thrust of the spring. When the valve is closed, the valve clack moves downwards by the pushing force of the spring. The sealing body is reversely thrust by the pressure of the medium. The spring is interacted with the pressure of the medium. The medium passes through the sealing body and slowly exhausts to the output end. The valve port is slowly closed. The closing speed slows down, and buffering is formed. The pressure is prevented from increasing greatly. The buffering type waterproof hammer valve has the advantages of being capable of reducing or avoiding generation of water attack of a water hammer, simple in structure, convenient to manufacture and maintain and long in service life.

Description

Buffering type water hammer-resistant valve

Technical field

The utility model relates to a kind of buffering type water hammer-resistant valve, is applied to the water transfer pipe network system in hydraulic engineering and the water supply project.

Background technique

Valve rod unlatching or the shutoff stroke of stop valve are relatively short, because the workpiece stroke is little, the short easy water hammer that produces of opening and closing time when valve closing, owing to there is speed in pipeline internal medium, continues forward stream impact spool, forms water hammer.And close faster valve, and pipeline internal medium is not yet slowed down, and flow is when also large, the water hammer of formation is also larger, and is also larger to the impact strength of valve, and long-time use just causes spool to damage.

In direct current type or Y shape stop valve, the runner of valve body becomes an oblique line with sprue, and the destructiveness of flowing state is less than conventional stop valve like this, but also corresponding little by the pressure loss of valve, easier generation water hammer.

The model utility content

The utility model provides a kind of buffering type water hammer-resistant valve for solving the existing above-mentioned shortcoming of stop valve, can reduce or avoid the generation of water hammer water attack, and is simultaneously simple in structure, makes and keep in repair more convenient, and the life-span is longer.

The utility model adopts following technological scheme:

The buffering type water hammer valve that disappears is comprised of valve body, flap, valve gap, valve rod, seal, spring and piston.

The seal of described flap is a round platform, has cylindrical cavity in the flap, and inner chamber is mounted with a spring, and inner cavity top has a bore less than the pipeline opening of inner chamber.Described valve rod front end has piston, and piston is inner at inner chamber, and valve rod can pass in and out in pipeline opening, and piston promotes telescopic spring.Inner chamber, spring and piston form damping mechanism.

During the valve closes state, the open valve doorway, spring is pushed by piston at inner chamber.When pipeline have MEDIA FLOW through the time, the pressure of medium promotes to move on the flap, down produces thrust after the spring stress compression, the pressure of spring and medium interacts, make medium slowly flow to outlet end through seal, valve port is slowly opened, and the reaction thrust of spring has cushioned the pressure of medium.

During valve opening state, the cut-off valve doorway, piston is at the inner chamber extrusion spring, and seal is subjected to the reaction thrust of spring.When pipeline have MEDIA FLOW through the time, the thrust of spring moves down flap, the anti-seal that pushes away of the pressure of medium, the pressure of spring and medium interacts, and makes medium slowly be discharged to outlet end through seal, and valve port is slowly closed, closing velocity slows down and has formed buffering, prevents that pressure from increasing severely.

Advantage of the present utility model: 1, prevent that water hammer is effective, the technology of slow opening, non-return speed is closed, Slow Close etc. is eliminated water hammers is integrated, prevent that water hammer is to the infringement of supply channel and valve body.2, easy to operate, can obtain suitable control parameter by setting control valve opening.3, valve body has adopted full tunnel, direct current type, airflow design, and hydraulic loss is little, good energy-conserving effect.

Description of drawings

Fig. 1 is complete section structural representation of the present utility model.

Wherein: 1. valve body, 2. flap, 3. valve gap, 4. valve rod, 5. seal, 6. spring, 7. piston, 8. inner chamber.

Embodiment

Buffering type water hammer-resistant valve is comprised of valve body 1, flap 2, valve gap 3, valve rod 4, seal 5, spring 6 and piston 7.

The seal 5 of described flap 2 is a round platform, has cylindrical cavity 8 in the flap 2, and inner chamber 8 is mounted with a spring 6, and inner chamber 8 tops have a bore less than the pipeline opening of inner chamber 8.Described valve rod 4 front ends have piston 7, and piston 7 is in inner chamber 8 inside, and valve rod 4 can pass in and out in pipeline opening, and it is flexible that piston 7 promotes spring 6.Inner chamber 8, spring 6 and piston 7 form damping mechanism.

During the valve closes state, the open valve doorway, spring 6 is subjected to piston 7 extruding at inner chamber 8.When pipeline have MEDIA FLOW through the time, the pressure of medium promotes to move on the flap 2, spring 6 is subjected to force compresses down to produce thrust, spring 6 interacts with the pressure of medium, make medium slowly flow to outlet end through seal 5, valve port is slowly opened, and the reaction thrust of spring 6 has cushioned the pressure of medium.

During valve opening state, the cut-off valve doorway, piston 7 is at inner chamber 8 extrusion springs 6, and seal 5 is subjected to spring 6 reaction thrust.When pipeline have MEDIA FLOW through the time, the thrust of spring 6 moves down flap 2, the anti-seal 5 that pushes away of the pressure of medium, spring 6 interacts with the pressure of medium, makes medium slowly be discharged to outlet end through seal 5, and valve port is slowly closed, closing velocity slows down and has formed buffering, prevents that pressure from increasing severely.

Claims

1. buffering type water hammer-resistant valve, by valve body (1), flap (2), valve gap (3), valve rod (4), seal (5), spring (6) and piston (7) form, it is characterized in that: the seal (5) of described flap (2) is a round platform, have cylindrical cavity (8) in the flap (2), inner chamber (8) is mounted with a spring (6), inner chamber (8) top has a bore less than the pipeline opening of inner chamber (8), described valve rod (4) front end has piston (7), piston (7) is in inner chamber (8) inside, valve rod (4) can pass in and out in pipeline opening, it is flexible that piston (7) promotes spring (6), the open valve doorway, spring (6) is subjected to piston (7) extruding at inner chamber (8), when pipeline have MEDIA FLOW through the time, the pressure of medium promotes to move on the flap (2), spring (6) is subjected to force compresses down to produce thrust, spring (6) interacts with the pressure of medium, make medium slowly flow to outlet end through seal (5), valve port is slowly opened, and the reaction thrust of spring (6) has cushioned the pressure of medium; The cut-off valve doorway, piston (7) is at inner chamber (8) extrusion spring (6), seal (5) is subjected to the reaction thrust of spring (6), when pipeline have MEDIA FLOW through the time, the thrust of spring (6) moves down flap (2), the pressure of medium promotes seal (5), spring (6) interacts with the pressure of medium, makes medium slowly be discharged to outlet end through seal (5), and valve port is slowly closed, closing velocity slows down and has formed buffering, prevents that pressure from increasing severely.