RU2557817C1 - Float fill valve - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: float fill valve with bottom water supply contains body with seat in form of nozzle and external securing cylinder, post with bracket and guide, installed in cavity of the post, stock and elastic membrane connected with stock. The stock is connected via the lever and tie-rod with float that moves along the guide. The bracket is made with internal and external sleeves, at that the membrane is secured in the internal sleeve of the bracket. The internal sleeve of the bracket has slots, and in closed position of the fitting interacts with the ring shoulder made on the body around the seat.

EFFECT: invention reduces uncontrolled leaks and increases operation efficiency of the valve.

2 cl, 2 dwg

Description

The invention relates to hydraulic equipment and is intended for calibrated filling with liquid of various kinds of containers, in particular drain tanks

The prior art is a direct-acting filling valve, which provides for its quick closing at the last stage of filling the flushing tank (see patent RU 2248489, class F16K 31/24, publ. 20.03.2005). In a known design, the float is placed in a glass, in the bottom of which a check valve is mounted. When filling the tank due to the check valve, the glass remains dry and quickly fills with water as soon as the water level in the flush tank exceeds the upper cut of the glass. The float at this moment also rises quickly and the flow of water into the flush tank stops. The disadvantage of this valve is the increased material consumption due to the glass and its check valve, as well as the complexity of the design from the point of view of manufacture and the possibility of adjustment.

The closest in technical essence to the claimed invention is a float filling valve with a bottom water supply, comprising a housing with a seat in the form of a nozzle and an external mounting cylinder, a rack with a bracket formed by the inner and outer cups, and a guide along which the float mounted in the cavity moves the rod is equipped with a sealing gasket and connected through a lever and rod with a float and an elastic membrane connected to the rod, fixed in an arm and interacting with the nozzle (see patent RU 2351835, class F16K 31/24, published on April 10, 2009). The main disadvantages of the known device are insufficiently tight closure of the membrane after flushing and, as a result, underestimation of water consumption with each emptying of the flushing tank, which can reach from 0.5 to 1 liter of water depending on the pressure in the water supply network. This is explained by the following: for the simplest design of the backpressure filling valve, leakage of the shut-off element in the form of drip leaks is allowed for 20 minutes after filling the tank. This corresponds to very low costs, which the water meter does not take into account, but up to 1 liter of water can pour out in these 20 minutes. Thus, insufficiently fast closing of the valve at the last stage of filling the tank leads to significant water loss.

The objective of the invention is to remedy these disadvantages. The technical result is to reduce uncontrolled leaks. The problem is solved, and the technical result is achieved by the fact that in the float filling valve with a bottom water supply containing a housing with a seat in the form of a nozzle and an external mounting cylinder, a rack with a bracket formed by the inner and outer cups, and a guide along which the float moves, a rod installed in the cavity of the rack, connected through a lever and rod with a float, and an elastic membrane connected to the rod, fixed in the bracket and interacting with the nozzle, the membrane is fixed in the inner ane bracket, which is provided with slits in a closed position and valve interacts with an annular protrusion formed on the housing around a seat. The outer bracket cup is preferably fixed to the outer mounting cylinder by means of a bayonet coupling.

In FIG. 1 shows a General view of the proposed float filling valve with a lower water supply;

in FIG. 2 is a section AA in FIG. one.

A float filling valve with a lower water supply comprises a housing 1, an elastic membrane 2, a stem 3, a rack 4, an extension cord 5, a lever 6, a rod 7, a float 8, a conical sealing elastic gasket 9, an oblique plastic washer 10, a nut 11 and filter 12.

The rack 4 is equipped with a bracket formed by the inner 13 and outer 14 glasses. The housing 1 is made in conjunction with a saddle in the form of a nozzle 15 and a throttling sleeve formed in the closed position of the valve by an annular protrusion 16 and an inner glass 13 with slots. The connection of the rack 4 and the housing 1 is carried out by means of a bayonet connection of the outer glass 14 and the mounting cylinder 17 made on the housing 1. The float 8 moves along the guide on the rack 4.

The rod 3 is sealed with a membrane 2 fixed in the inner glass 13. On the surface of the rod 3 there are longitudinal drainage grooves that provide free separation of its working end from the adjacent surface of the membrane 2 at the time of opening of the valve.

The conical gasket 9 and the oblique washer 10 make it possible to prevent the float from touching the 8 walls of the tank and serve to conveniently install the valve in the drain tank with walls tilted inwards, which greatly facilitates the work of the installer in cramped conditions of the toilet room.

The valve operates as follows.

When the flush tank is empty and the valve is connected to the water supply system, the float 8 is in the lower position. As a result, the long shoulder of the lever 6 is tilted down, and its short shoulder together with the rod 3 are raised up. Under the action of a water stream passing sequentially through the filter 12, the throttling sleeve and the central hole of the seat 15, the elastic membrane 2 is squeezed from the end of the seat 15. As a result, water passes through the gap between the membrane 2 and the seat 15 through the longitudinal slots in the inner glass 13, and through the vertical ring-shaped slots between the mounting cylinder 17 and the inner cup 13 will enter the flush tank, raising the level of filling with water in it.

In existing valves, the float 8 must also rise. However, in the proposed - until a certain point it will be in the lower position and will be sunk in the incoming water. This happens because the membrane 2, made at the same time with the sealing gasket in the inner glass 13, creates under the action of pressure in the throttle chamber around the nozzle 15 a force directed upward and preventing the rod 3 from lowering and raising the float 8. The pressure in this chamber is caused by throttling of the flow liquid passing through the longitudinal slots in the inner glass 13. The float 8 will be in the lower position as long as the force applied to the rod 3 from the action of the lifting force is less than the force that occurs s as a result of the water pressure in chamber mezhdrosselnoy the effective area of the membrane 2.

After the lifting force of the float 8 increases as the filling level of the flushing tank rises, and its reduced value at the point of contact of the lever 6 and rod 3 exceeds the force from the action of water pressure on the membrane 2, the rod 3 will begin to move to close the gap between the end of the nozzle 15 and membrane 2. With a decrease in this gap, the flow through it will begin to decrease, which means that the pressure in the inter-throttle chamber will begin to decrease. As a result, the float 8 quickly rises to the upper position, the rod 3 will also relatively quickly and reliably press the working surface of the membrane 2 to the seat 15, and the filling of the tank will stop.

At the next descent of the drain tank, the float 8 will go down and the process of filling the tank will be repeated.

The combination of the gasket and the locking element in the membrane 2 leads to a significant simplification of the design of the valve and reduces its cost. Firstly, there is no need to install special non-return valves in order to prevent water from flowing from the flushing tank into the water supply network when the valve is closed in front of the riser of the water supply network (such non-return valves are performed either as a separate unit or are combined with the filter housing, and the cost of filling fittings by increasing the number of parts and the use of skilled manual labor during their assembly). Secondly, protection from water leakage from the flushing tank into the water supply network during its shutdown is sometimes done through the use of an air gap in the water flow. This method requires the installation of a locking and regulating body above the maximum filling level of the flushing tank, which complicates and increases the cost of the design by creating a complex unit for supplying pressure water to the valve. In addition, when creating a vacuum in a disconnected water supply network, air enters it from the toilet room along with pathogenic microbes that settle on the walls of the pipes of the water supply network and multiply. After the riser is turned on, the water, along with the microbes that have settled on the walls of the water pipes, enters the water users with all the ensuing consequences. The proposed device allows to eliminate these disadvantages. In addition, the introduction into the valve of the delay unit of the moment of its closure and its quick closure at the last stage of filling the tank eliminates underestimation of the consumed water by the water meters.

Thus, the present invention allows to reduce uncontrolled leakage and significantly increase the efficiency of the valve.

Claims (2)

1. A float filling valve with a lower water supply, comprising a housing with a nozzle-shaped seat and an external mounting cylinder, a rack with an arm formed by internal and external cups, and a guide along which the float mounted in the rack cavity is connected by a rod and traction with a float, and an elastic membrane connected to the rod, fixed in the bracket and interacting with the nozzle, characterized in that the membrane is fixed in the inner glass of the bracket, which is equipped with slots and in a closed the position of the valve interacts with an annular protrusion made on the body around the saddle. 2. The valve according to claim 1, characterized in that the outer cup of the bracket is fixed in the outer mounting cylinder by means of a bayonet coupling.

Images