CN202215805U

CN202215805U - Water attack release valve

Info

Publication number: CN202215805U
Application number: CN2011201914473U
Authority: CN
Inventors: 陈乙飞
Original assignee: SHENZHEN HUALIDA ELECTROMECHANICAL TECHNOLOGY CO LTD
Current assignee: ZHEJIANG DUNAN INTELLIGENT CONTROL TECHNOLOGY CO., LTD.
Priority date: 2011-06-08
Filing date: 2011-06-08
Publication date: 2012-05-09
Anticipated expiration: 2021-06-08

Abstract

The utility model discloses a water attack release valve. A cylinder body is arranged in a valve body. The upper end of the valve body is provided with a valve cover. A piston is arranged inside the cylinder body. A space of the side wall of the piston and a small hole pipe on the side wall of the cylinder body are communicated with the outside air. The valve body and a pilot valve are arranged into one whole body in an overlaying mode. The pilot valve is communicated with a space at the upper part of the piston through an internal small pore channel. A control guide pipe is arranged outside a main valve body. An internal pore channel is arranged inside a valve wall. The space at the upper part of the piston is connected with an inlet end through the internal small pore channel and the external guide pipe. The pilot valve is connected with an outlet end through the internal pore channel. The piston moves up and down so that the inlet end and the outlet end can be kept in a switch-on or switch-off state. The water attack release valve has compact and firm structure, is convenient to transport and install, and has high reliability, high release speed, small volume and high safety. Redundant energy can be ensured to be safely released under the water attack condition.

Description

A kind of water attack bleeder valve

Technical field

The utility model relates to valve field, relates in particular to a kind of water attack bleeder valve-security classes valve.

Background technique

This valve is near a kind of pump outlet or by the protection equipment of being installed in, and plays the safety installations of protection water pump, pipe fitting and aqueduct; The general structure of existing valve is that its valve body has some control conduits to be connected with pilot valve, because outer extension catheter is too much, long, receives wound easily and causes whole valve malfunctioning, and controlling component is too much on the conduit, and likelihood of failure increases, whole valve reliability reduction; Outer extension catheter increases whole valve overall volume size greatly, increases installing space; It is fast inadequately to open valve speed, and the water hammer that can not respond burst type fast boosts, and raises and be only applicable to let out the pressure that removes slow property; Irrelevant valve damping mechanism, it is fast to cause closing valve speed, thereby can not Slow Close be that self closes the valve water hammer to avoid that the secondary water hammer takes place; Control characteristic is poor during the little aperture of small flow, opens suddenly suddenly and closes, and is easy to generate " chatter " and " hunting ".

The model utility content

The technical problem that the utility model will solve provides a kind of inside formation compact structure that conduit is arranged on the valve wall of controlling, by the leading type water attack bleeder valve of pilot valve control main valve keying.

For solving the problems of the technologies described above, the utility model is realized through following scheme: a kind of water attack bleeder valve is provided with cylinder body in main valve body; The upper end is provided with valve gap; Said cylinder interior is provided with piston, and said piston side wall space is communicated with outside air with an aperture pipe on the said cylinder side wall, and main valve body and pilot valve veneer are installed as an integral body; Said pilot valve utilizes the inner aperture road to be communicated with the piston upper space; Be provided with the control conduit in the main valve body outside, be provided with inner duct at the valve pars intramuralis, said piston upper space is connected with entrance point through inner aperture road, outer conduit; Said pilot valve is connected with outlet end through inner duct, and said piston moves up and down and can make entrance point and outlet end keep UNICOM or off state.

Utilize internal control runner UNICOM's pilot valve and main valve body on the valve wall.

Outer logical type stepped piston formula working principle, piston top area is about 2 times of bottom area.

V-type opening valve seat is fixed on the main valve body.

Said piston adopts between inclined-plane valve seat and the inclined-plane flap and is provided with seal ring.

Adopt technique scheme, compared with prior art, the advantage that the utility model had is following:

1, the pilot valve veneer of the utility model is fixed on the valve body, and pilot valve is stable not to be rocked, and the valve pars intramuralis is provided with the control aperture, has reduced external control conduit and joint quantity and has shortened the conduit flow channel length, has improved whole valve events reliability and the ability of resisting wound.

2, the utility model piston top area is about 2 times of bottom area, and under identical pressure action, the pressure on top is about 2 times of bottom, and it is big to close valve pressure when closing valve, closes reliable and water-tight; When driving valve, piston top pressure is by emptying, and thrust is big on the piston, and valve opening force is big, realizes fast quick-opening valve easily.

3, the utility model piston side wall space connects outside breeder tube, and aperture connects atmosphere, forms the air damping chamber, guarantees that piston motion is free, and closes valve speed with metering pin valve control, makes hydraulic control valve realize slowly closing through air damping.

4, on the inlet ducts needle-valve is housed, can regulates the flow that control gets into the piston top, thereby valve speed is closed in control.

5, V-type opening valve seat is fixed on the main valve body, and is firm reliable, is subject to the lateral stream impact and vibrates the defective that causes the fatigue damage fracture thereby overcome the V-shaped valve lobe; Also have the waterpower buffer function simultaneously, under the little aperture state of small flow, can reduce the sensitivity of flap stroke greatly, thereby improve control characteristic, avoid producing " chatter " and " hunting " phenomenon because open suddenly to close suddenly to aperture and flow size.

6, the linear sealing structure between employing inclined-plane valve seat and the inclined-plane flap, particulate contamination are difficult for piling up at the valve seat place, have significantly reduced valve port by the packing less possibility of particles clog, have overcome the plane valve port and have been prone to stopped up the defective of leaking by impurity, guarantee sealing.

7, the utility model can be set the cracking pressure of main valve through the adjusting bolt on the pilot valve, and the size of pressure is confirmed by system.

In sum, the utility model compact structure is firm, convenient transportation and installation, and good reliability, the speed of releasing is fast, and volume is little, and is safe, can guarantee the rich energy of releasing of safety under the situation that water attack takes place.

Description of drawings

Fig. 1 is the structure sectional view of the utility model;

Fig. 2 is that sectional view is looked on the left side of the utility model.

Embodiment

Like Fig. 1, shown in 2, a kind of water attack bleeder valve is provided with cylinder body 2 in main valve body 1; The upper end is provided with valve gap 5, and said cylinder body 2 inside are provided with piston 6, and said piston 6 sidewall spaces are communicated with outside air with an aperture pipe 12 on said cylinder body 2 sidewalls; Main valve body 1 is installed as an integral body with pilot valve 13 veneers, and said pilot valve 13 utilizes inner aperture road 15 to be communicated with piston 6 upper spaces, is provided with the control conduit in main valve body 1 outside; Be provided with inner duct 4 at the valve pars intramuralis; Said piston 6 upper spaces are connected with entrance point 9 through inner aperture road 15, outer conduit 3, and said pilot valve 13 is connected with outlet end 10 through inner duct 4, and said piston 6 moves up and down and can make entrance point 9 and outlet end 10 keep UNICOM or off state; Adopt the veneer mounting type between pilot valve 13 and the main valve body 1; Utilize internal control runner UNICOM pilot valve 13 and main valve body 1 on the valve wall, logical outward type stepped piston formula working principle, piston 6 top areas are about 2 times of bottom area; V-type opening valve seat 8 is fixed on the main valve body 1, is provided with seal ring 11 between piston 6 employing inclined-plane valve seats and the inclined-plane flap 14.

Under the normal pressure situation, some pressure medium is got in the cavity of pilot valve 13 by aperture road 15 with pilot valve 13 through the outer conduit 3 that has needle-valve, and piston 6 was in and pressed down closed state this moment, and the water attack bleeder valve is closed water-tight.

Next interim when water attack, pressure medium impacts the main valve piston bottom, and the spring that pushes pilot valve 13 simultaneously makes it the back and upward moves; The pressing plate that drives the spring bottom moves up; At this moment pilot valve 13 is connected through inner duct 4 with outlet end 10, and the press water of piston 6 upper spaces is through pilot valve 13 and aperture road 15 and inner duct 4 rapid pressure release to outlet end 10, and the piston 6 medium effect that is stressed moves up; Cause entrance point 9 and outlet end 10 to be communicated with, big flow sluices.

After water attack weakened, the spring-loaded bottom pressing plate of pilot valve 13 moved down, and closes intercommunicating pore; Because the top area of piston 6 is about 2 times of the bottom area, under identical pressure action, the pressure on top is about 2 times of bottom; This moment, piston 6 top pressure slowly increased; Can regulate with needle-valve simultaneously, piston 6 sidewall spaces receive resistance of air simultaneously, and the velocity ratio that cause piston 6 slowly moves down is slower; The miter valves seated connection that is displaced downwardly to inclined-plane flap 14 and cylinder body 2 gradually touches, and water intake is closed.

Claims

1. water attack bleeder valve; It is characterized in that: in main valve body (1), be provided with cylinder body (2), the upper end is provided with valve gap (5), and said cylinder body (2) inside is provided with piston (6); Said piston (6) sidewall spaces is communicated with outside air with an aperture pipe (12) on said cylinder body (2) sidewall; Main valve body (1) is installed as an integral body with pilot valve (13) veneer, and said pilot valve (13) utilizes inner aperture road (15) to be communicated with piston (6) upper space, is provided with the control conduit in main valve body (1) outside; Be provided with inner duct (4) at the valve pars intramuralis; Said piston (6) upper space is connected with entrance point (9) through inner aperture road (15), outer conduit and interface (3) thereof, and said pilot valve (13) is connected with outlet end (10) through inner duct (4), and said piston (6) moves up and down and can make entrance point (9) and outlet end (10) keep UNICOM or off state.

2. water attack bleeder valve according to claim 1 is characterized in that: utilize internal control runner UNICOM pilot valve (13) and main valve body (1) on the valve wall.

3. water attack bleeder valve according to claim 1 is characterized in that: logical outward type stepped piston formula working principle, piston (6) top area is about 2 times of bottom area.

4. water attack bleeder valve according to claim 1 is characterized in that: V-type opening valve seat (8) is fixed on the main valve body (1).

5. water attack bleeder valve according to claim 1 is characterized in that: said piston (6) adopts between inclined-plane valve seat and the inclined-plane flap (14) and is provided with seal ring (11).

6. water attack bleeder valve according to claim 1 is characterized in that: the logical outward atmosphere of the cavity between piston (6) and the cylinder body (2), thus form the inner air damping, realize that Slow Close closes valve.