RU1810611C - Device for delivery of liquid - Google Patents

Abstract

SUMMARY OF THE INVENTION: The pressure and suction lines of the chamber are equipped with check valves. The pipe is connected by pipes with the lower and upper parts of the chamber. A float valve is installed in the chamber. The intermediate tank is located above the storage tank and is connected to the chamber by a suction line with a check valve. The upper part of the pipe is connected by pipelines with a tank and a reservoir in the upper parts, and the lower part with a chamber and a tank in the upper parts. The lower part of the tank is connected via a non-return valve to the upper part of the tank. The pipe is equipped with a two-way valve made in the form of a float mounted between two bellows, the free ends of which are fixed on the upper and lower parts of the pipe. Two plates are connected by rods to the upper and lower bellows. The pipe is provided with seats in the place where the pipe communicates with the chamber and tank. 2 ill.

Description

The invention relates to a pump construction, in particular to a design of displacement pumps.

The purpose of the invention is to increase efficiency and performance.

This object is achieved in that the device further comprises a storage chamber, an intermediate reservoir located above the storage chamber and connected to the chamber by a suction line with a check valve, upper and lower tubes connecting the upper part of the pipe to the liquid tank and the lower part of the pipe to a chamber in their upper mast, two lines, one of which connects the upper part of the pipe to the intermediate tank, and the second - the lower part of the pipe to the storage chamber in their upper parts st, a tube with a check valve connecting the intermediate tank to the accumulation chamber, and a two-way valve located in the pipe and consisting of a float installed between two bellows and attached to the upper and lower parts of the pipe of two plates connected by rods to the bellows , and seats located in the upper and lower parts of the tube. In the proposed device, the injection of fluid is carried out due to the potential energy of the differential pressure independent

about

ON

simo from his nature. In this case, an additional energy source is not required, and there is no electrical control circuit. In addition, the proposed device allows not only to supply liquid from a vessel with a lower pressure to a vessel with a higher pressure, but also, depending on the available differential pressure, to supply liquid in cases where the pressure vessel is located above the vessel low pressure, which is very important for practical implementation.

Figure 1 schematically shows the proposed device; figure 2 is a specific example of its implementation.

A device for pumping liquid contains a container with liquid 1, a chamber 2 with a pressure 3 and a suction 4 lines with non-return valves 5 and 6, a pipe 7 connected by pipes 8 and 9 with the upper and lower parts of the chamber 2, a float valve 10, installed in the chamber 2 at the inlet of the pipe 9. It also contains a storage chamber 11, an intermediate reservoir 12 located above the storage chamber 11 and connected to the chamber 2 by a suction line 4 with a check valve 6, two tubes 13 and 14 connecting the upper part pipes 7 respectively It is connected with a container with a liquid 1 and an intermediate reservoir 12 in their upper parts, as well as two tubes 15 and 16 connecting the lower part of the pipe 7 to the chamber 2 and the storage chamber 11 in their upper parts, respectively, the pipe 17 with a non-return valve 18 connecting the intermediate tank 12 with the accumulation chamber 11, in addition, the device contains a two-way valve located in the pipe 7 and consisting of a float 19 installed between two bellows 20 and 21, the free ends of which are fixed on the upper and lower ends of the pipe 7, respectively, two that rods 22 and 23, connected by rods 24 and 25 with the upper and lower bellows 20 and 21, as well as saddles 26 and 27 located at the point of supply of the tubes 13 and 15 to the upper and lower parts of the pipe 7.

The device operates as follows ..

At the initial time, the pressures in the container with liquid 1, chamber 2 and intermediate tank 12 are equal. The pressure in the storage chamber 11 is higher than the pressure in the listed components of the device. Check valve 18 is closed. The float valve 10 is open. The two-way valve under the action of the mass of the float is in the lower position (plate 22 does not touch the seat 26. a

the plate 23 is pressed against the saddle 27). Check valve 6 is closed.

Under the action of the liquid column, the check valve 5 and the liquid from

containers 1 along the pressure line 3 enters the chamber 2 and partially through the float valve 10 and the pipe 9 to the lower part of the pipe 7. As the chamber is filled, the float valve 10 closes and the liquid. no bone enters the tube 7. When the chamber 2 is completely filled, the liquid enters through the pipe 8 into the pipe 7. With an increase in the liquid level in the pipe 7, the float 19 floats. In this case, the plate 22 presses 5 s to the seat 26, and the plate 23 moves away from the seat 27. Gas (steam) with the pressure of the storage chamber 11 through the tubes 16 and 15 enters the chamber 2. The check valve 5 closes. The liquid from the chamber 2 through the suction line 4 through the check valve 6 enters the intermediate reservoir 12. As the liquid level decreases, the float valve 10 opens and the liquid from the pipe 7 through the pipe 9 flows into the chamber

5 2 and further along the suction line 4 through the non-return valve 6 to the intermediate tank 12. When all the liquid from the chamber 2 passes into the intermediate tank 12, gas (steam) from the chamber 2 through the suction pipe 4 enters the intermediate tank 12 and in it a pressure equal to the pressure in the storage chamber 11 is established. Under the action of the liquid column, the check valve 18 opens and the liquid from

5 of the intermediate tank 12 flows into the accumulation chamber 11. At this time, the pipe 9 continues to flow through the pipe 9 through the float valve 10 from the pipe 7. The float 19 is lowered, the plate 22 leaves

0 from the seat 26, and the plate 23 is pressed against the seat 27. Gas (steam) from the intermediate tank 12 through the tubes 14 and 13 enters the tank with liquid 1. Valve 18 closes 3. As the pressure in the intermediate tank 12 decreases, gas (steam) from the chamber 2 through the suction line 4 through the check valve 6 enters the intermediate tank 12 and then through the tubes 14 and 13 into the container with liquid 1. In the intermediate

At reservoir 12, chamber 2, and pipe 7, a pressure equal to the pressure in the reservoir of liquid 1 is established. The cycle is completed.

Such devices can be used in plants for storing agricultural products under reduced pressure to remove excess contaminated moisture from the storage volume, to ensure circulation or recirculation of working substances in absorption refrigeration units, for pumping liquids in various processes of chemical technology.

Let us consider an example of using the proposed device for supplying an absorbent solution from an absorber to a high-stage generator of a two-stage bromide-solid absorption refrigeration machine.

In Fig. 2, the numerical designations correspond to elements of the device of Fig. 1. At the same time, absorber 1 acts as a container with liquid, and a high-stage generator 11 acts as a storage chamber. To describe the operation of the device, a line 28 connecting the generator to the absorber is added (this line is conventionally shown by a dashed line, since between the high-level generator and the absorber is still a low-stage generator and solution heat exchangers, which does not change the meaning of the connection - it returns the absorbent solution from the high-level generator 11 to the absorber 1 of the installation). In addition, figure 2 shows the level of liquid rise HP.

A device for circulating an absorbent between an absorber and a high stage generator of a two-stage absorption bromine-lithium refrigerating machine operates as follows.

At the initial time, the tank 12, the chamber 2 and the pipe 7 are free of liquid. The two-way float valve in the pipe 7 is in the lower position (shut-off unit 23 is closed and shut-off unit 22 is open). Due to this, the pressure of the absorber 1 is established in the tank 12, the chamber and the pipe 7. The check valve 18 is closed. Under the action of the liquid column, the check valve 5 opens and the absorbent solution from the absorber 1 enters the pipe 2 into the chamber 2, the float valve located in the chamber 2 closes and the liquid does not enter the pipe 7. When the chamber 2 is completely filled, the absorbent solution through the pipe 8 enters the pipe 7. The two-way float valve 19 located therein is moved to the upper position (the upper shut-off assembly 22 closes and the lower 23 opens). In this case, the vapors from the generator 11 through the tubes 16 and 15 enter the chambers at 2, squeezing the liquid out of it 4 through an open check valve 6 into the intermediate reservoir 12. When all the liquid from the chamber 2 passes into the intermediate reservoir 12, the pairs from the generator 11 through the tubes 16. 15 through the chamber 2 and highway 4 enter the reservoir 12 and the generator pressure is established in it

11. The check valve 18 opens and the absorbent solution from the intermediate reservoir 12 enters the generator 11 through a pipe 17. At the same time, part of the absorbent solution from the generator 11 passes through the line 28 to the absorber 1. In addition, a float valve installed in the chamber 2, the liquid opens from the pipe 7. The two-way float valve 19 installed in the pipe 7 is lowered and lowered. The lower locking assembly 23 is closed and the upper 22 is opened. Vapors from the reservoir 12 through the tubes 14 and 13 enter the absorber 1. The pressure in the reservoir 12 drops 5 et. Vapors from chamber 2 along line 4 through reservoir 12 and tubes 14 and 15 also enter absorber 1. Since when the pressure in reservoir 12 decreases, the check valve 18 closes and the lower shut-off assembly 23

0 of the two-way float valve is also closed, only the vapors that are in the tank 12, chamber 2 and pipe 7 enter the absorber. Now the pressure of the absorber is established in the listed nodes of the device

5 1. The cycle is completed. The volume of the chamber 2, the intermediate tank 12 and the pipe 7 is incomparably small compared with the vapor volumes of the absorber 1 and the generator 11, therefore, the circulation of vapors between the generator 11 and the absorber 1 cannot have a significant effect on the operating cycle of the installation.

Let's analyze the possible height

5 fluid lifting for the example in question. The pressure in the generator is 760 mmHg. or 10 m water, the pressure in the absorber can be equal to zero. Thus, the disposable pressure drop is 10 m water column. The density of the absorbent solution (aqueous solution of the bromide line) is -1500 kg / m.

The theoretical height of the liquid will then be:

where Нр is the height of the solution, m; 50 Нв - height of water rise, m; p & - water density, kg / m3; PP - the density of the solution, kg / m3.

H0

10 -1000 1500

 6.6m

Thus, the device according to the invention can supply the absorbent solution from the absorber to the high-stage generator of a two-stage absorption bromide-lithium refrigerating machine with a level difference between the upper point of the generator and the lower point of the absorber, which is approximately 6 m.

Claims (1)

SUMMARY OF THE INVENTION A device for pumping liquid, comprising a container with a liquid, a chamber with pressure and suction lines equipped with check valves, a pipe communicated by pipes with lower and upper parts of the chamber, and a float valve installed in the chamber, characterized in that , in order to improve operational characteristics, the device further comprises a storage tank, an intermediate tank located above the location of the storage tank and in communication with the chamber of the suction ma with a non-return valve, in this case the upper part of the pipe is communicated through pipelines with a tank and an intermediate tank in their upper parts, and the lower - with a chamber and an accumulation tank in their upper parts, the lower part of the intermediate tank is communicated through a pipeline with a non-return valve with the upper part of the storage tank, the pipe is equipped with a two-way valve made in the form of a float mounted between two bellows, the free ends of which are fixed on the upper and lower parts of the pipe, two plates to, connected by rods to the upper and lower bellows, and also. the pipe is equipped with saddles in the place of pipe communication through pipelines with the chamber and capacity. Fie. 1 Editor M. Kozlova Tehred M. Morgenthal Order 1432 Mintage. Subscription VNIIIPI of the State Committee for Inventions and Discover at the USSR State Committee for Science and Technology 113035, Moscow, Zh-35, Rauska nab., 4/5 Production and Publishing Plant Patent, Uzhgorod. Gagarina St., 101 FIG. I Corrector P. Gereshi