CN2287174Y - Water level control automatic valve - Google Patents

Abstract

The utility model discloses a water level control automatic switch, comprising a floating body, a lever connected with the floating body, a water inlet pipe and a water outlet pipe. A valve core connected with the lever forms a dumbbell shape. The valve core is matched with the central hole of an o-ring seal to be arranged in a valve body. The inner part of the valve body is divided into two cavities by the o-ring seal. One cavity is communicated with the water outlet pipe. The lower end surface of the o-ring seal contacts the water inlet pipe. The other cavity independently exists. The cross sectional area of the other cavity ismore than the area of the water inlet pipe. The utility model has simple structure. The on-off action of the utility model is irrelevant to the water pressure. Therefore, the utility model is suitable for being used in various places with different water pressures. The utility model can avoid the secondary pollution which is caused because of backflow of water.

Description

Water level control automatic switch

The utility model relates to water level control automatic switch, is applied to the water level control automatic switch of tank for excrement pan especially.

Existing water level control automatic switch is typically float valve and liquid level location automatic switch.Float valve is lifting along with the lifting of water level, moves by the lever drives spool, and the outlet of application valve body reaches the purpose of automatic switch.Because spool is controlled at the port of export of valve body, liquid flows out the intense impact spool, and when closing valve, the power that imposes on spool is bigger, and this power is that ball float provides through lever.Therefore, for spool obtains bigger power when higher (special intake pressure than), will add long lever and strengthen ball float, so the float valve specification is a lot.Liquid level location automatic switch (notification number CN2055611U), ball float is lifting along with the lifting of water level, ball float moves by the lever drives spool, and spool is being controlled the entrance point of valve body, reaches the purpose of automatic switch, because spool is being controlled the entrance point of valve body, the water pressure of entrance point is big more, needs lever just long more and need ball float just big more, otherwise the entrance point spool of not opening, do not advance water, so liquid level location automatic switch specification is also a lot.

More than enumerate two kinds of existing water level control automatic switches, the water pressure of application places (as the high level or the low layer of building) high or low, directly with switch in large and small relevant (even big more with the water pressure in place, lever just need be long more, and buoyancy aid need be just big more) of the long and short and ball float of lever.Like this, in different use water pressure scopes, different specification (size) switch is just arranged.

The purpose of this utility model provides a kind of water level control automatic switch, and this switch application is made the usefulness of water inlet automatically in tank for excrement pan.The water pressure of the field of employment of this switch high or low (no matter promptly use water pressure high or low, has only the ball float of a kind of lever of specification and a kind of specification just passable with the large and small no any variation of long and short and ball float of lever in the switch; The high or low volume with switch of the water pressure of using does not change; A kind of switch just can be applied to any hydraulic pressure place that all use this switch).This switch can also be prevented the backflow of sealing, eliminates the secondary pollution of water.

The purpose of this utility model is achieved in that water level control automatic switch, valve body, spool, O-ring seal, lever and buoyancy aid are arranged, it is characterized in that spool is arranged, having different diameters to be dumbbell shaped in the spool (is spool two ends equal diameters, middle some diameter is littler than two ends diameter), the diameter that these are different and the centre bore of O-ring seal cooperatively interact, controlling lower surface or upper surface that the interior water level of valve body is in O-ring seal, thereby be the condition of a pressure differential of two end faces creation of O-ring seal, realize switching purposes.Spool is along with the effect of buoyancy aid through lever can move up and down in the centre bore at O-ring seal down.Two end faces of O-ring seal respectively have asymmetric ring-like groove mutually.O-ring seal is in the valve body, and valve body is divided into two chambeies, and a chamber directly communicates with outlet pipe, and another chamber independently exists.The centre bore of O-ring seal and the different-diameter of spool cooperatively interact, and are controlling water and are being in two chambeies in the valve body, thereby making two water pressure differences that end face bore of O-ring seal.O-ring seal can draw spool equally and swing up and down in valve body, thereby reaches the purpose of automatic switch.

The utility model will be further described below in conjunction with accompanying drawing: accompanying drawing is a water level control automatic switch schematic diagram, and wherein [1] is buoyancy aid; [2] be lever; [3] be fulcrum; [4] be spool, [5] are O-ring seals; [6] be valve body; [7] be breather valve; [8] be water tank.This water level control automatic switch comprises buoyancy aid [1], the lever [2] that is connected with buoyancy aid [1], and valve body is comprising water inlet pipe and outlet pipe in [6], and water inlet pipe is in the bottom of valve body [6], and outlet pipe is at the side of valve body [6].It is characterized in that buoyancy aid [1] is connecting lever [2], the spool [4] that lever [2] connects is dumbbell shaped, it cooperates with the centre bore of O-ring seal [5], be installed in the valve body [6], sealed cushion rubber [5] is separated into two chambeies in the valve body [6], and one of them chamber communicates with outlet pipe in the valve body [6], and an end face (lower surface) of O-ring seal [5] contacts with water inlet pipe in the valve body [6], another chamber independently exists, and its cross-sectional area is greater than the area of the water inlet pipe in the valve body [6].Outlet pipe in the valve body [6] becomes 90 ° of degree crooked, and a breather valve [7] is installed above outlet pipe.

Valve body [6] is connected the water source, (centre bore of O-ring seal [5] was filled at the major diameter position of spool this moment [4] when water entered into [b] mouth of pipe from [a], water can't enter [e] chamber), under the pressure effect of water, O-ring seal [5] is drawing upwards swing of spool, water enters into [c] from [b] immediately, and from [C] to [D] flows out and enter into water tank [8] again, the state that be in out this moment.Same time breather valve [7] is subjected to effect of water pressure and is upwards stopping up [f] breach.Water constantly rises in water tank [8], thereby buoyancy aid [1] rises and rises along with water level equally, when rising, depresses at lever [2] the following spool of effect [4] buoyancy aid [1] by fulcrum [3], when the minor diameter position in the spool [4] moves to centre bore with O-ring seal [5], water enters into [e] chamber from the minor diameter position of spool [4] and the centre bore gap between the two of O-ring seal [5] immediately, at this moment, because the compression area of O-ring seal [5] upper surface (promptly in the scope in [e] chamber) is greater than the compression area of lower surface (promptly in the scope of [b] mouth of pipe), so the pressure of O-ring seal [5] upper surface is greater than the pressure of lower surface, O-ring seal [5] is being pressed [b] mouth of pipe to lower swing immediately, is in the state of pass this moment.The same time, breather valve [7] is not having under the water pressure situation, under action of gravity own, freely fall, air enters in the valve body [6] (promptly in [C] chamber) from [f] breach, destroyed the vacuum state between valve body [6] interior (promptly in [C] chamber) and the water tank [8], the water of assurance water tank [8] separates with the water of [b] pipe, and the water surface of [C] chamber of valve body [6] and the eternal high water tank in [e] chamber [8], the backflow of anti-like this sealing, the pollution second time of eliminating water provides possibility.When closet need wash, pull the drain valve on the water tank, current in the water tank [8] to the greatest extent, buoyancy aid [1] reduces along with water level again and freely falls, water level control automatic switch return to not only original state (be water but also begin from [b] mouth of pipe enter [C] flow out from [D] enter the water tank [8]).

The utility model water level control automatic switch is applied to do in all tank for excrement pan the usefulness of water inlet automatically, and a kind of specification just is suitable for using in the tank for excrement pan of all floors, and the backflow of anti-sealing, eliminate the secondary pollution of water, volume is little, materials are economized, and is easy for installation long with the life-span.

Claims (3)

1, a kind of water level control automatic switch, comprise buoyancy aid, the lever that is connected with buoyancy aid, it is characterized in that the spool that lever connects is dumbbell shaped, it cooperates with the centre bore of O-ring seal, is installed in the valve body, and sealed cushion rubber is separated into two chambeies in the valve body, one of them chamber communicates with outlet pipe, and an end face of O-ring seal contacts with the water inlet pipe of valve body, and another chamber independently exists, and its cross-sectional area is greater than the area of water inlet pipe.

2, water level control automatic switch according to claim 1 is characterized in that two end faces of O-ring seal respectively have mutual asymmetric ring-shaped groove.

3, water level control automatic switch according to claim 1 and 2 is characterized in that the outlet pipe top is equipped with a breather valve.