CN85100308B - The delay-self-closing flush valve that has damping unit - Google Patents

Abstract

Have the delay-self-closing flush valve of damping unit, be specially adapted to the washroom, as: water-closet, lavatory basin, urinal etc.This valve adopts hollow type slip tubulose spool, reaches independently damping system of relative water system.Can work under higher hydraulic pressure, the time of time-delay closing can be regulated.Overcome general flushing valve spring easy-to-rust, the susceptible to plugging shortcoming of damping hole, manufacturing and easy to maintenance.

Description

The delay-self-closing flush valve that has damping unit

The present invention relates to a kind of delay-self-closing flush valve that has damping unit, it is suitable for being installed in the pipelines such as flush toilet, lavatory basin, urinal.

The flushing valve that uses has many form of structure at present.The flushing valve undamped device that has, too fast because of closing velocity, produce serious shock and vibration when hydraulic pressure is high, noise is very big; Spring is worked in water, and corrosion is serious, so valve leaks easily, application life is low, and the flushing valve that also has opens and closes by piston or barrier film pressure reduction up and down, prolong by the damping hole on piston or the barrier film or delay time by the damping hole that is located on the valve body.As described flushing valves such as United States Patent (USP)s 4088297,4261545,4327891,4424952, because damping hole easily stops up, influence closing of valve, cause the waste of water.For solving the blockage problem of damping hole, once there were some flushing valves to occur with different form of structure, adopted independent damping unit as United States Patent (USP) 3211416, solved the blockage problem of damping hole.But, during this valve regulation delay time, top cover must be unloaded and regulate.Such structure makes complex operation, not only adjusts inconveniently, and causes the damage of top cover easily and loses.In addition, this valve adopts the cartridge type diaphragm as seal, and hydraulic pressure acts directly on the diaphragm, during opening of valves, can not ignore by the influence of hydraulic pressure.

The purpose of this invention is to provide a kind of delay-self-closing flush valve that has damping unit, it not only seals reliably water-tight, and flexible operation is laborsaving, and damping hole does not stop up, not corrosion of spring, and be particularly suitable for can realizing adjustment to the self-closing time-delay of valve in the valve body outside.

The objective of the invention is to realize by following proposal: this flushing valve is valve gap, valve body, spool, the valve seat that fits together by potted component.Wherein spool adopts the hollow type sliding tube, and the mouth of pipe is close to and is being fixed with on the valve gap of sealing mat, and the unlatching of spool is handled by hand lever formula controlling organization.The peripheral disposition of sliding tube has the damping system relatively independent with water system, the compression spring that the dependence that resets of spool is positioned over below the ring-type damping piston is finished, and the valve body wall that constitutes the damping cavity passage is provided with the throttle valve gear of damping fluid flow in the upper and lower cavity passage of outside adjusting communication damping cavity.

Because the present invention has adopted the damping system relatively independent with water system, advances not impurity elimination thing in the damping cavity, undamped hole plug problem.Particularly adopt the closing element of hollow type sliding tube, make the open and close of valve be subjected to influence of hydraulic pressure hardly as spool.Be arranged on the throttle valve gear of valve body outside, operate nimble laborsaving.The bath time can be regulated under the situation of not dismantling any valve member easily, and sealing is reliably water-tight.That damping unit in this valve and element are made is simple, reliable operation, maintenance are very convenient.Because the compression spring is worked, therefore there is not the corrosion problem in addition in antirust damping fluid, improved the application life of valve, solved people and wanted for a long time to solve and open question.

Below in conjunction with accompanying drawing the present invention is further described:

Fig. 1 is the longitudinal sectional view of a kind of concrete structure of the present invention.

Fig. 2 is the front view of choke valve among the present invention.

Fig. 3 is the vertical view of Fig. 2.

Describe concrete structure of the present invention and operational circumstances in detail according to Fig. 1～3.The potted component of this valve adopts " O " shape sealing ring, and valve gap 1, valve body 3, valve seat 10 are fitted together by thread set.There is sealing mat 2 at the center of valve gap 1 with pad and screw, and the spool in the valve seat 10 adopts hollow type sliding tube 7, and the peripheral disposition of sliding tube 7 has the damping system relatively independent with water system.This system constitutes a damping cavity by valve body 3, lining 4, sliding tube 7, valve seat 10, and forms enclosed construction by potted component.Be fixed on the ring-type damping piston 6 on the sliding tube 7 a plurality of one way valves are housed, damping piston 6 is divided into upper and lower two parts with damping cavity, and compression spring 8 is housed in the cavity of resorption, is full of the antirust damping fluid body up and down in the damping cavity.Done groove on lining 4 excircles, formed the passage of damping cavity with the inwall of valve body 3, this passage is communicated with upper and lower damping cavity by the through hole of relevant position on the lining 4.On valve body 3 walls that constitute the damping cavity passage, be provided with throttle valve gear.Choke valve 5 usefulness staies and potted component in this device are assembled in the hole of valve body 3 and lining.Choke valve 5 insertion end external surfaces have many throttling channels (shown in Fig. 2,3) that sectional area is different, the common passage of linking up upper and lower damping cavity of the through hole on this throttling channel and the lining 4.By regulating the throttling channel position of choke valve 5 different cross-sectional in the outside of valve body 3, make damping fluid flow difference in the upper and lower chamber passage of linking up damping cavity, can obtain the time of needed time-delay closing flushing valve.The unlatching of spool is by hand lever formula mechanism operating.This mechanism is with operating fork 9 fork end and fork arm middle part, is hinged on respectively by bearing pin and forms on the lining that valve seat 10 and sliding tube 7 warp-wises connect.Sliding tube 7 and the lining on it tighten up sealing, and joining by locking nut, potted component and water inlet pipe in the upper end of valve gap 1 tightens up, and joining by locking nut, support cover, hold-down ring, potted component and outlet pipe in the lower end of valve seat 10 tightens up.

When depressing operating fork 9 handle ends, sliding tube 7 moves down, and meanwhile, damping piston 6 moves down spring 8 and is compressed, and the damping fluid in the following damping cavity flows to via one way valve and goes up damping cavity.So sealing mat 2 is left in the upper end of sliding tube 7, the outlet pipe that the cavity that water enters sliding tube 7 from water inlet pipe through the outlet pass of valve gap leads to valve seat 10 lower ends flows out.When decontroling operating fork 9 handles, resetting of spool relies on compression spring 8 to finish.Damping piston 6 and sliding tube 7 move upward under the elastic force effect of spring 8, and at this moment, one way valve is closed automatically, damping fluid in the last damping cavity can only be by the through hole on the lining 4, throttling channel on choke valve 5, the passage by on damping cavity valve body 3 walls flows back to down damping cavity.Owing to the throttling action of the throttling channel on the choke valve 5, limited the rate of climb of damping piston 6 and sliding tube 7.At the external rotating choke valve 5 of valve body 3, the through hole on the throttling channel that makes different cross section and the lining 4, the passage on valve body 3 walls communicate, and just can obtain different sliding tubes 7 rates of climb.In the flow process of damping fluid, when rising to mouth of pipe top tight sealing pad 2, ends sliding tube 7, and flushing valve cuts out fully.Can make sliding tube 7 rate of climb differences owing to regulate choke valve 5, so be easy to obtain the different delay-self-closing time.

Claims (2)

1, a kind of delay-self-closing flush valve that has damping unit, it comprises water inlet pipe, outlet pipe, valve gap, valve body, spool, the valve seat that fits together by potted component, the unlatching of spool is handled by hand lever formula controlling organization.It is characterized in that spool adopts the hollow type sliding tube, the mouth of pipe is close to and is being fixed with on the valve gap of sealing mat, the peripheral disposition of sliding tube has the damping system relatively independent with water system, the compression spring that the dependence that resets of spool is positioned over below the ring-type damping plug is finished, on the valve body wall that constitutes the damping cavity passage, being provided with can be from the outside throttle valve gear of regulating damping fluid flow in the upper and lower chamber passage of linking up damping cavity.

2, delay-self-closing flush valve according to claim 1 is characterized in that the choke valve insertion end external surface in the described throttle valve gear has many throttling channels that sectional area is different.

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