CN201013608Y - Centrifugal pump liquid supply system - Google Patents

Abstract

The utility model relates to a centrifugal pump liquid supply system, which comprises a centrifugal pump (2), a liquid inlet pipe (1), a liquid outlet pipe (5) and a return pipe (10); one end of the liquid inlet pipe (1) is communicated with the liquid inlet end of the centrifugal pump (2), and the other end of the liquid inlet pipe is inserted below the liquid level of the low-liquid-level liquid source; one end of the liquid outlet pipe (5) is communicated with the liquid outlet end of the centrifugal pump (2), and the other end is communicated with the upper part of the high liquid level liquid pool (8); one end of the return pipe (10) is communicated with the lower part of the high liquid level liquid pool (8), and the other end is communicated with the liquid outlet end of the centrifugal pump (2). The utility model discloses centrifugal pump feed liquid system's back flow can be with the automatic feed liquor pipe and the centrifugal pump of supplementing of the liquid in the high liquid level liquid pond, consequently, before the restart centrifugal pump at every turn, need not carry out the operation of supplementary liquid. In addition, because the packing of the centrifugal pump and the bottom valve of the water inlet pipe only have small leakage, the liquid lost in the high liquid level liquid pool is not too much.

Description

A centrifugal pump liquid supply system

technical field

The utility model relates to a liquid supply system for supplying liquid from a low liquid level liquid source to a high liquid level liquid pool, in particular to a centrifugal pump liquid supply system.

Background technique

The centrifugal pump liquid supply system is a liquid supply system that intermittently supplies liquid from a low liquid level liquid source (such as a water source) to a high liquid level liquid pool (such as a water tank) through a centrifugal pump. As shown in FIG. 3 , a traditional centrifugal pump liquid supply system includes a centrifugal pump 2 , a liquid inlet pipe 1 , and a liquid outlet pipe 3 . The installation position of the centrifugal pump 2 is higher than the low liquid level liquid source. One end of the liquid inlet pipe 1 communicates with the liquid inlet end of the centrifugal pump 2, and the other end is inserted below the liquid surface of the low-level liquid source; a bottom valve 11 is provided on the liquid inlet pipe 1 below the liquid surface of the low-level liquid source; Valve 11 is a one-way valve that only allows liquid to flow from the low-level liquid source to the centrifugal pump 2;

In the traditional centrifugal pump liquid supply system, when the centrifugal pump 2 stops supplying liquid, the liquid in the liquid inlet pipe 1 and the centrifugal pump 2 will be lost due to slight leakage at the packing of the centrifugal pump and the bottom valve 11 of the water inlet pipe. , and the liquid at a low liquid level cannot automatically fill the impeller chamber in the liquid inlet pipe 1 and the centrifugal pump 2, so before restarting the centrifugal pump 2 each time, the liquid replenishment operation must be performed, that is, the bottom valve 11 of the liquid inlet pipe must be closed , let the liquid fill the liquid inlet pipe and the impeller cavity, and then start the centrifugal pump 2.

In order to overcome the shortcomings of the traditional centrifugal pump liquid supply system, CN2186809 discloses a "centrifugal pump negative pressure starter", which installs a container with an air release valve on the pipeline at the inlet end of the centrifugal pump, and the centrifugal pump stops When supplying liquid, the liquid in the container can fill the impeller cavity in the liquid inlet pipe 1 and the centrifugal pump 2 with liquid, thus solving the problem of negative pressure starting of the centrifugal pump, but because the liquid in the container cannot be automatically replenished, the system is still The automatic liquid replenishment operation before each restart of the centrifugal pump cannot be fully realized.

Contents of the invention

The technical problem to be solved by the utility model is to provide a liquid supply system for a centrifugal pump, which does not need to replenish liquid before restarting the centrifugal pump each time.

The technical solution adopted by the utility model to solve the problems of the technologies described above is:

A centrifugal pump liquid supply system, which includes a centrifugal pump, a liquid inlet pipe, and a liquid outlet pipe;

One end of the inlet pipe is connected with the inlet end of the centrifugal pump, and the other end is inserted below the liquid surface of the low-level liquid source; a bottom valve is provided on the liquid inlet pipe below the liquid surface of the low-level liquid source; the bottom valve is only allowed One-way valve for liquid flow from low level liquid source to centrifugal pump;

One end of the liquid outlet pipe communicates with the liquid outlet of the centrifugal pump, and the other end communicates with the upper part of the high liquid level pool;

The system also includes a return pipe, one end of the return pipe communicates with the lower part of the high liquid level pool, and the other end communicates with the liquid outlet of the centrifugal pump.

In the above solution, a check valve is provided on the return pipe, and the check valve is a one-way valve that only allows liquid to flow from the high liquid pool to the centrifugal pump.

In the above scheme, the system also includes a sealed container, one end of the liquid inlet pipe communicates with the liquid inlet end of the centrifugal pump through the sealed container, the liquid inlet end of the centrifugal pump communicates with the lower part of the sealed container, and the liquid inlet pipe communicates with the upper part of the sealed container ; The height of the liquid level in the sealed container is higher than the height of the impeller cavity in the liquid inlet pipe and the centrifugal pump.

In the above scheme, the upper part of the airtight container is provided with an automatic air release valve.

In the above solution, the pipe diameter of the return pipe is smaller than the pipe diameter of the liquid outlet pipe.

Compared with the prior art, the utility model system has the following advantages:

1. The system includes a return pipe. One end of the return pipe communicates with the lower part of the high liquid level pool, and the other end communicates with the outlet of the centrifugal pump. The return pipe can automatically replenish the liquid in the high-level liquid pool to the liquid inlet pipe and the centrifugal pump, so there is no need to replenish liquid before restarting the centrifugal pump each time. In addition, since the centrifugal pump packing and the bottom valve of the water inlet pipe only have slight leakage, the liquid lost in the high liquid level pool will not be too much.

2. There is a check valve on the return pipe, which is a one-way valve that only allows liquid to flow from the high liquid pool to the centrifugal pump. It can prevent the liquid from entering the high liquid pool from the return pipe when the centrifugal pump is working.

3. The system also includes a sealed container. The liquid level in the sealed container is higher than that of the liquid inlet pipe and the impeller cavity in the centrifugal pump, which is beneficial to keep the liquid inlet pipe and the centrifugal pump filled with liquid.

4. There is an air release valve on the upper part of the airtight container, which can release air when the air in the airtight container reaches a certain amount.

5. Since there is only slight leakage at the packing of the centrifugal pump and the bottom valve of the inlet pipe, the diameter of the return pipe is smaller than that of the outlet pipe.

The system of the utility model can use the ordinary centrifugal pump to automatically replenish the liquid into the liquid inlet pipe and the centrifugal pump by adding the return pipe pipeline, which creates conditions for the unattended system and the automatic start of the centrifugal pump.

The centrifugal pump liquid supply system of the utility model has the advantages of simple structure, low price, convenient installation, reliable performance and greatly reduced working intensity, and is especially suitable for ordinary centrifugal pumps to automatically transfer from low-level water sources such as rivers, ponds, pools, and wells to high-level water tanks (pools). Water supply, can be used as a remote automatic water supply system in the electrolytic manganese industry.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1

Fig. 2 is the structural representation of the utility model embodiment 2

Figure 3 is a schematic structural diagram of a traditional centrifugal pump liquid supply system

Detailed ways

As shown in Figure 1, Embodiment 1 of the centrifugal pump liquid supply system of the present invention is a centrifugal pump liquid supply system that can be unattended and automatically started by the centrifugal pump. It includes a centrifugal pump 2, a liquid inlet pipe 1, and a liquid outlet pipe 5; one end of the liquid inlet pipe 1 communicates with the liquid inlet end of the centrifugal pump 2, and the other end is inserted below the liquid surface of the low liquid level liquid source; the low liquid level liquid source A bottom valve 11 is provided on the liquid inlet pipe 1 below the liquid surface; One end of the liquid outlet pipe 5 communicates with the liquid outlet of the centrifugal pump 2 , and the other end communicates with the upper part of the high liquid level pool 8 .

The system also includes a return pipe 10 with a check valve 6, one end of the return pipe 10 communicates with the lower part of the high liquid pool 8, and the other end communicates with the liquid outlet of the centrifugal pump 2; The liquid level pool 8 flows to the one-way valve of the centrifugal pump 2 . The pipe diameter of the return pipe 10 is much smaller than the pipe diameter of the liquid outlet pipe 5 .

The system also includes a sealed container 3, one end of the liquid inlet pipe 1 communicates with the liquid inlet end of the centrifugal pump 2 through the sealed container 3, the liquid inlet end of the centrifugal pump 2 communicates with the lower part of the sealed container 3, and the liquid inlet pipe 1 communicates with the sealed container. The upper part of 3 Unicom. The liquid level in the sealed container 3 is higher than the liquid inlet pipe 1 and the height of the impeller cavity in the centrifugal pump 2 . The top of the airtight container 3 is provided with an air release valve 4 .

The system also includes a controller 9 of the centrifugal pump and a liquid level switch 7 arranged in the high liquid level pool 8 . The output end of the liquid level switch 7 is connected with the controller 9, and the controller 9 controls the work of the centrifugal pump 2 according to the liquid level information in the high liquid level liquid pool 8.

Embodiment 2 of the centrifugal pump liquid supply system of the present invention as shown in Figure 2 includes a centrifugal pump 2, a liquid inlet pipe 1, and a liquid outlet pipe 5; one end of the liquid inlet pipe 1 communicates with the liquid inlet end of the centrifugal pump 2, The other end is inserted below the liquid level of the low-level liquid source; the bottom valve 11 is provided on the liquid inlet pipe 1 below the liquid level of the low-level liquid source; the bottom valve 11 only allows liquid to flow from the low-level liquid source to the centrifugal pump 2 one-way valve. One end of the liquid outlet pipe 5 communicates with the liquid outlet of the centrifugal pump 2 , and the other end communicates with the upper part of the high liquid level pool 8 .

The system also includes a return pipe 10, one end of the return pipe 10 communicates with the lower part of the high liquid level pool 8, and the other end communicates with the liquid outlet of the centrifugal pump 2.

Claims (5)

1. A centrifugal pump liquid supply system, which comprises a centrifugal pump (2), a liquid inlet pipe (1), and a liquid outlet pipe (5); One end of the liquid inlet pipe (1) communicates with the liquid inlet end of the centrifugal pump (2), and the other end is inserted below the liquid surface of the low-level liquid source; There is a bottom valve (11); the bottom valve (11) is a one-way valve that only allows liquid to flow from a low-level liquid source to the centrifugal pump (2); One end of the liquid outlet pipe (5) communicates with the liquid outlet of the centrifugal pump (2), and the other end communicates with the upper part of the high liquid level pool (8); It is characterized in that the system also includes a return pipe (10), one end of the return pipe (10) communicates with the lower part of the high-level liquid pool (8), and the other end communicates with the liquid outlet of the centrifugal pump (2). 2. The liquid supply system according to claim 1, characterized in that: the return pipe (10) is provided with a check valve (6), and the check valve (6) only allows liquid to flow from the high level liquid pool (8) ) to the check valve of the centrifugal pump (2). 3. The liquid supply system according to claim 1, characterized in that: it also includes a sealed container (3), and one end of the liquid inlet pipe (1) passes through the sealed container (3) and the centrifugal pump (2). The end is connected, the liquid inlet end of the centrifugal pump (2) is connected with the lower part of the sealed container (3), and the liquid inlet pipe (1) is connected with the upper part of the sealed container (3); the liquid level in the sealed container (3) is higher than The height of the impeller cavity in the inlet pipe (1) and centrifugal pump (2). 4. The liquid supply system according to claim 3, characterized in that: the upper part of the sealed container (3) is provided with an automatic air release valve (4). 5. The liquid supply system according to claim 1, characterized in that: the pipe diameter of the return pipe (10) is smaller than the pipe diameter of the liquid outlet pipe (5).

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