CN2171041Y

CN2171041Y - Self-pressure sealed ball cock

Info

Publication number: CN2171041Y
Application number: CN 93221159
Authority: CN
Inventors: 樊喜元
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-13
Filing date: 1993-08-13
Publication date: 1994-07-06
Anticipated expiration: 2003-08-13

Abstract

The utility model relates to a self-pressure sealed ball cock, comprising a plunger cock, a float ball and cock stems. The plunger cock comprises a cock core, a cock body, a cock seat, and guide rings. The pressure end of the cock stems softly contacts with the cock core, the buoyancy end of the cock stems is connected with the float ball, and the cock periphery protrudes into a water tank. The sealing pressure of the self-pressure sealed ball cock comes from the self-pressure of the tap water, the float ball floats off with the water level rising during the cock shutting, the cock core moves down to fall on a cock seat under the action of the water pressure and the dead load, and the cock automatically shuts. The float ball and the cock stems drop down with the water lowering under the action of the dead load during the switching-on the cock core is jacked up upward, and the water flows out from the intake chamber. The utility model is small size, large flow quantity, good switch tightness, no need of constant maintenance and long service life.

Description

Self-pressure sealed ball cock

The utility model belongs to the float valve class.

Float valve is a kind of special valve that is used to control liquid level.Though the float valve pattern in using at present is different, principle is identical, all be that the pressure that utilizes the transmission by lever of buoyancy that ball float produces to change into the compress rubber pad is blocked water outlet, turn-offs current.Therefore, this class valve can be referred to as floating function formula floating float valve.Floating function formula float valve is owing to be subjected to the restriction of its principle of compositionality, the effective value of sealing load is very low, the sealed rubber pad is fragile or be subjected to displacement, and it is little to have determined that this valve exists effective drift diameter, and floating ball diameter is big, valve rod is long, fragile, amount of maintenance is big, and life cycle is short, and switch performance is poor, many shortcomings such as long, easy leakage of trickle phase.

For solving the leakage problem of float valve, once the someone released and replaced product " not leaking float valve " (notification number 2038970, the day for announcing 890607), it is that outer means of press seals with existing float valve changes inner pressuring sealing into, reaches the purpose of reliable sealing in the valve to the external compression spool.For reducing ball float and leverage size, sealing is reliable, designs to replace product " liquid level control float valve " (notification number 2061631, the day for announcing 900905), its spool is positioned at valve rod lower end and valve seat below, equalizing piston is positioned at valve rod upper end and valve seat below, and leverage one end is connected with the valve rod lower end, and an end is connected with ball float, like this, liquid level in container raises, or surpasses absolute altitude, just is easy to make valve closing.These two valves are the sealing load source with the buoyancy that ball float produces still, thereby still have the problem on the principle.

The utility model is to implement the problem that sealing is produced at the above-mentioned buoyancy that produces with ball float, is intended to design a kind of pressure-tight self-pressure-sealed formula float valve of tap water self that leans on, and the ball float volume of valve is little, flow is big, switch performance good.

The purpose of this utility model realizes that in the following manner self-pressure-sealed formula float valve comprises plunger valve, ball float 3 and the valve rod 4 that makes it to connect.Plunger valve comprises spool 11, valve body 8, valve seat 9.The spool 11 of sticking seal washer 10 is positioned at valve seat 9 tops down.Perforate in the middle of the spool, periphery has intake chamber 18.There is guide collar 7 the valve seat below, and the spool foot piece passes guide collar, and the top is to the pressure end of valve rod, and the buoyancy end of valve rod connects ball float 3.

The utility model content is described with reference to the accompanying drawings.

Fig. 1 the utility model structural representation

The vertical cut-away view of Fig. 2 spool

The horizontal cut-away view of Fig. 3 spool

Fig. 4 sealing surface of seat stress figure

With reference to accompanying drawing, the buoyancy end of valve rod 4 connects ball float 3, and its top is fixing with nut 1, packing ring 2.To be connected pin 5 as fulcrum, ball float can move up and down around fulcrum between the buoyancy end of valve rod and pressure end.Spool foot piece top contacts with pressure end is soft to the valve rod pressure end, even the fulcrum corrosion causes displacement of valve rod, also can not influence the spool proper functioning.Valve rod and valve body 8 joints are provided with the ears or side handles of a utensil 6, and are fixedly connected.Guide collar 7, valve seat 9, spool 11 are contained in the valve body 8, and lining ring 12 is arranged between spool and valve body.17 of valve body and intake pipes are communicated with elbow 14, and fixing with clamping bolt, nut 15,16.

The utility model sealing load source is from the pressure of tap water self, and the process of closing is that ball float 3 floats, and spool moves down under the effect of hydraulic pressure and deadweight, drops on the valve seat and closes voluntarily, and at this moment hydraulic pressure is that motor-driven factor is again the antagonism factor.Opening process is the deadweight that relies on ball float and valve rod with the spool jack-up that makes progress, water flows out from spool intake chamber 18, and open, therefore opening process is the antagonistic process of gravity and hydraulic pressure, at this moment hydraulic pressure becomes the antagonism factor by the motor-driven factor of closed condition, and gravity becomes motor-driven factor, whole process and buoyancy are unimportant, as long as can play the deadweight of ball float and valve rod, thereby ball float can be done very for a short time, the big 3-5 of the comparable present float valve of the effective drift diameter of water outlet doubly, so also greatly 3-5 times of flow.

Water level till when valve rod is in horizontal position shown in Figure 1, promptly valve is in closed condition.This moment the spool stress as shown in Figure 4, whole pressure H of tap water are pressed on the spool, the outlet residual pressure of water is 0, the suffered hydraulic pressure positive pressure P of sealing surface of seat is:

P=(H * π r ₁+ G)/(π (r ² ₂-r ² ₁)) (G is a spool gravity)

Obviously positive pressure is greater than side pressure, so leakage phenomenon does not take place.And hydraulic pressure is high more, and the difference of P and H is big more, can not leak more.When hydraulic pressure is very low, approached 0 o'clock, the positive pressure P that sealing surface is subjected to is:

P＝ (G)/(π(r ² ₂-r ² ₁))

This pressure just in time can make rubber pad produce slight resiliently deformable, overcomes the leakage phenomenon that may cause because it is rough.

Valve by the process that is closed to unlatching is: drawdown, ball float and valve rod descend under the deadweight effect, spool is upwards pushed up, this moment the intake chamber of water on spool, the center hole of valve seat flows out, the total head state of the hydraulic pressure that be subjected on the spool this moment when closing become and only born part hydraulic pressure, (another part has consumed with outlet residual pressure form), and strength and no change that valve rod upwards pushes up so spool can move upward immediately, make valve be the state of throwing open.Otherwise valve by being opened to the process of closing is: when water level rises near constant sealing position, and the ball float come-up, spool moves down, and sealing surface effectively narrows down through flow area.At this moment the flow velocity that flows through sealing surface increases, and flow diminishes, the outlet residual pressure of water diminishes, the pressure difference that acts on the spool upper and lower surface this moment becomes big, and the ball float that contends with spool and the gravity no change of valve rod, this moment, spool moved downward naturally up to falling on the valve seat, made valve enter buttoned-up status soon.So the utility model product has the general good switch performance of solenoid valve.

The utility model product not only volume is little, flow is big, switch performance is good, good seal performance, and owing to sealing material is in the peripheral WATER AS FLOW MEDIUM, not only stressed even, can deformed damaged, also avoided contacting simultaneously with air, overcome the deterioration by oxidation phenomenon, sealing material is improved working life greatly, make this product have good non-maintaining function.

Claims

1, self-pressure-sealed formula float valve, comprise plunger valve, ball float (3) and the valve rod (4) that makes it to connect, plunger valve comprises spool (11), valve body (8), valve seat (9), it is characterized in that the spool of sticking seal ring (10) is positioned at the valve seat top down, perforate in the middle of the spool, periphery has intake chamber (18), guide collar (7) is arranged under the valve seat, the spool foot piece passes guide collar, and the top is to the pressure end of valve rod, and the buoyancy end of valve rod connects ball float.

Between 2, float valve according to claim 1, the buoyancy end that it is characterized in that valve rod and pressure end to be connected pin (5) as fulcrum.

3, float valve according to claim 1 is characterized in that valve rod and valve body joint are provided with the ears or side handles of a utensil (6).

4, float valve according to claim 1 is characterized in that lining ring (12) is arranged between spool and valve body.