SU996999A1 - Device for limiting pouring of liquid into reservoir - Google Patents

Description

The invention relates to level control and can be used in the oil, chemical, food and other industrial sectors where it is necessary to pour liquid into a sealed tank to a certain level.

A liquid level regulator is known, which contains a float with a hollow lever, an inlet nozzle vertically fixed in the tank, and an elastic elastic tube attached to the hollow lever and the inlet nozzle, the lower end of which is located below the liquid level l.

The disadvantages of the regulator are its low reliability due to the possibility of breaking the elastic tube from repeated repetition of the flexion-extension cycle, as well as the ability to regulate the liquid level only in low-pressure systems.

A liquid level regulator is known, which contains a tank with an inlet pipe, on which vertical equipotential shells, a float and a movable holder associated with it are located coaxially with an inlet pipe, which is equipped with

ring partitions within the shoals 2.

However, this device. Characterized by insufficient tightness of the overlap of the input line.

The closest in technical essence to the invention is a device for limiting the level of liquid pouring into a container, containing a pneumatic level sensor, made in the form of a glass, installed in the container bottom upwards and connected to the pneumatic amplifier, connected to the pneumatic amplifier, in which an additional glass of a larger diameter is introduced with a reverse innana in the lower part, with the upper. .

 the edge of the additional cup is located above the lower edge of the main cup Z.

The disadvantages of the known device are its complexity.

25 presence of pneumatic sensor with. Pnevmusili -

a telecom associated with the executive mechanism, as well as the possibility of hydrrudar occurrence in the supply pipe of the instantaneous field 36 of it blocking the moving fluid.

The purpose of the invention is to simplify the device, increase the reliability of shutting off the supply pipeline and prevent water hammer in it.

This goal is achieved by the fact that in the device for limiting the filling of liquid into a sealed reservoir, containing a valve installed on the supply pipe connected to a piston installed in a hydraulic cylinder, a piston is spring-loaded over the piston cavity of the hydraulic cylinder and sealed at the liquid level and drainage point -the pressure line through the float valve, and the piston cavity is connected to the drainage-pressure line behind the float valve.

FIG. 1 shows the device, the initial position in FIG. 2 - the same, after filling the tank to the required level.

The device contains a sealed reservoir 1 (FIG. 1) with inlet pipe 2, on which is installed a valve .3 connected to a piston 4, spring-loaded 5, and installed in the hydraulic cylinder 6, with the over-piston cavity 7 of the hydraulic cylinder of the c. 8 connected with a sealed reservoir 1 and with a drainage pressure head station 9, in which the float valve 10 is installed, and the piston cavity 11 is connected to the drainage-pressure line 9 by a pipe 12.

The device works as follows.

When filling the sealed tank 1 through the supply pipe 2, the air from the sealed tank drains the pipe 8, the over piston cavity 7 of the hydraulic cylinder .6 and the drainage-pressure line 9 to the atmosphere.

When the level of the liquid in the hermetic reservoir 1 of the point of the limiting level of the liquid at the point of connection with the tube 8 is reached, the tube 8 is filled with the hydraulic cylinder over-piston cavity 7 and the drainage-pressure head. line 9, while in the drainage-pressure line 9 closes the float valve 10 and the overlap of the drainage-pressure line 9.

As fluid enters and pressure rises in a sealed tank, pressure in the tube increases. And in the hydraulic piston 7 of the hydraulic cylinder 6, as a result, overcoming the force of the release spring 5,

the valve 3 begins to move downward, closing the access of the liquid to the hermetic tank 1 through the supply pipe 2 (see Fig. 2).

Air from the piston cavity 11 of the hydraulic cylinder b is removed through the tube 12 S of the drainage-pressure line 9. To empty the pressurized tank 1, the drainage-pressure line 9 is pressurized and the pressure, opening the float valve 10, is transmitted to the over-piston cavity 7 of the cylinder 6 and also the pipe 12 in the piston cavity 11 hydraulic cylinder b. Since the pressures on both sides of the piston are equal, the force of the spring 5 opens the valve 3. As a result, the device returns to its original position and the sealed tank is emptied.

Thus, a smooth and tight shut-off of the supply pipe when using this device improves the reliability and durability of the tank 1 and the supply pipelines by eliminating the possibility of water hammer, and the simplicity of the device reduces the cost of automating the process of pouring liquid into the tank.

Claims (3)

Invention Formula A device for limiting the filling of a liquid into a hermetic reservoir containing a valve installed on a supply pipe connected to a piston mounted in a hydraulic cylinder. about the fact that, in order to simplify the device, increase the reliability of shutting off the supply pipeline and prevent a hydraulic impact in it, the piston is spring-loaded, the hydraulic cylinder over-piston cavity is connected to a sealed reservoir at the point of liquid limit and through the float valve and the piston-cavity is connected to a drain pressure line for float valve. Sources of information 1 taken into account in the examination 1, USSR Author's Certificate 625192, cl. G 05 D 9/02, 1977. 2. USSR author's certificate number 652537, cl. G 05 O 9/02, 1977.  3. Copyright of the USSR 512457, cl. G 05 D 9/02, 1974 (prototype). urouen g-f ypai -eight fff -AT -It H 5 i -It