CN102635559B - Closed pipeline device of pump test system - Google Patents

Abstract

The closed pipeline device of the pump test system includes a water tank, a centrifugal pump, a first collecting tank and a second collecting tank. The water tank and the centrifugal pump are connected through a water inlet pipe, and the top of the water tank is connected to a vacuum device. The vacuum pumping device described above includes a vacuum pump, the water tank and the vacuum pump are connected through a vacuum device tube, the water tank inlet pipe is installed on the water tank, and a valve group is installed on the vacuum device tube connection. The vacuum pump is a water ring vacuum pump, and the first steam-water separator is installed on the vacuum pump. A submersible pump is arranged in the water tank of the present invention, and the submersible pump and the water inlet pipe are connected through a submersible pump tube, so that the parameters of the same water pump in different environments can be tested, that is, the parameters when the cavitation phenomenon occurs under normal conditions can be tested, It can also test the parameters of different pipe diameters and parallel connection of various pipe diameters, without changing the test device, easy to use, and low testing cost; it can also test the test parameters of different types of water pumps, which can test the performance of centrifugal pumps and submersible pumps.

Description

Pump test system closed pipeline device

technical field

The present invention relates to a test pumping device, specifically a closed pipeline of a pump test system.

Background technique

Water pump testing generally requires testing parameters in different environments. For example: during normal operation, when cavitation occurs, in pipelines of different diameters and in the parallel connection of multiple pipelines. Water pumps include centrifugal pumps (vertical, horizontal, single-stage, multi-stage) and submersible pumps (well, small, sewage, mining, single-phase, screw), etc. The parameters of various pumps also need to be tested. The current test device has the following disadvantages: 1. A test device can only measure the operating parameters of the pump in a single environment. If it is necessary to obtain more parameters in the environment, it needs to be replaced to a different test device. The operation is complicated and cumbersome. It is inconvenient to use, the test cost is high, and the replacement process takes up a lot of time in the test; 2. One test device can only test the test parameters of one type of pump, and cannot realize the performance test of different types of water pumps. The scope of application of a device Narrow; 3. When the pump test bench is dismantling the centrifugal pump after the test, due to the outflow of test water remaining in the pipeline, not only the test bench is dirty, but also the cleaning process affects the efficiency of dismantling the centrifugal pump, and the test water is lost at the same time. A test device capable of testing various water pumps in different environments is currently the focus of research by those skilled in the art.

Contents of the invention

The object of the present invention is to provide a closed pipeline device of a pump test system, which can solve the above problems.

In order to achieve the above object, the present invention is achieved through the following technical solutions: the closed pipeline device of the pump test system includes a water tank, a centrifugal pump, a first collecting tank and a second collecting tank, and the water tank and the centrifugal pump pass through The water inlet pipe is connected, the centrifugal pump and the first collecting tank are connected through the outlet pipe, the first collecting tank and the second collecting tank are connected through several measuring tubes, each measuring tube is connected in parallel, and the second collecting tank The tank and the water tank are connected by return pipes; valve groups are installed on the water inlet pipe, outlet pipe, measuring pipe and return pipe respectively, and measuring devices are installed on the water inlet pipe, water outlet pipe and measuring pipe; the water inlet pipe, outlet pipe and return pipe For the main road.

In order to further realize the object of the present invention, the following technical solutions can also be adopted: the top of the water tank is connected with a vacuum pump, the vacuum pump includes a vacuum pump, the water tank and the vacuum pump are connected by a vacuum device pipe, and the water tank is installed on the water tank The intake pipe and the vacuum device pipe are connected to install the valve group. The vacuum pump is a water ring vacuum pump, and the first steam-water separator is installed on the vacuum pump. A submersible pump is arranged in the water tank, and the submersible pump is connected with the water inlet pipe through a submersible pump pipe, and the submersible pump pipe is connected on the pipeline between the valve group of the water inlet pipe and the first collecting tank. A reflux device is installed on the main road, and the reflux device includes the inlet pipe of the main pipe and the second steam-water separator, and a valve group is installed on the inlet pipe of the main pipe, and the inlet pipe of the second steam-water separator is passed between the main pipe and the second steam-water separator. Connection, between the second steam-water separator and the water tank is connected through the outlet pipe of the second steam-water separator, and a valve group is installed on the water inlet pipe of the second steam-water separator and/or the outlet pipe of the second steam-water separator. The valve group is composed of a manual valve and an electric regulating valve or an electric valve and an electric regulating valve. The water tank, the first collecting tank and the second collecting tank are respectively equipped with a water tank vent valve, a first collecting tank vent valve and a second collecting tank vent valve; a safety valve is installed on the water tank.

The present invention has the advantages of being able to test the parameters of the same water pump in different environments, that is, it can test the parameters of the cavitation phenomenon under normal conditions, and can also test the parameters of different pipe diameters and parallel connection of pipe diameters without Replace the test device, easy and quick to operate, easy to use, low test cost, save test time, and improve work efficiency; it can also test test parameters of different types of water pumps, for example: it can test the performance of centrifugal pumps and submersible pumps; test After the completion, the test water returns to the water tank, and no test water flows out during the disassembly of the water pump, which can keep the test bench clean. The invention also has the advantages of simple and compact structure, low manufacturing cost and easy use.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Reference signs: 1 Centrifugal pump 2 Water tank 3 First collecting tank 4 Second collecting tank 5 Water inlet pipe 6 Water outlet pipe 7 Measuring pipe 8 Water return pipe 9 Vacuum pump 10 Vacuum device pipe 11 First steam-water separator 12 Submersible pump 13 Submersible pump pipe 14 Second steam-water separator 15 Second steam-water separator inlet pipe 16 Second steam-water separator outlet pipe 17 Main line inlet pipe 18 Water tank inlet pipe 19 Water tank vent valve 20 First collecting tank deflate Valve 21 second header tank release valve 22 safety valve 23 spare valve group 24 check valve 25 air flow meter 26 water flow meter 27 temperature gauge 28 pressure gauge 29 liquid level gauge. the

Detailed ways

The closed pipeline of the pump test system, as shown in the figure, includes the water tank 2, the centrifugal pump 1, the first collecting tank 3 and the second collecting tank 4, and the water tank 2 and the centrifugal pump 1 pass through the water inlet pipe 5 connection, the centrifugal pump 1 and the first collecting tank 3 are connected through the outlet pipe 6, the first collecting tank 3 and the second collecting tank 4 are connected through four measuring tubes 7, and each measuring tube 7 is connected in parallel , the second collecting tank 4 and the water tank 2 are connected through the return pipe 8; the inlet pipe 5, the outlet pipe 6, the measuring pipe 7 and the return pipe 8 are respectively equipped with valve groups, the inlet pipe 5, the outlet pipe 6, the measuring A measuring device is installed on the pipe 7; the water inlet pipe 5, the water outlet pipe 6 and the water return pipe 8 are the main pipelines. The individual measuring tubes 7 have different diameters. The measuring device includes a water flow meter 26 , a temperature meter 27 , a pressure meter 28 and a liquid level meter 29 . Water flow meter 26 is installed on each measuring pipe 7, and temperature gauge 27 and pressure gauge 28 are all installed on water inlet pipe 5 and outlet pipe 6, and pressure gauge 28 and liquid level gauge 29 are installed on water tank 2. When testing and measuring the centrifugal pump, open the valve group, start the centrifugal pump, and record the data of each measuring device. When the measurement environment needs to be changed, by opening/closing the valve group on the measuring tube 7, the condition of the pipeline is changed, so as to achieve the purpose of measuring the centrifugal pump in different environments. Compared with the traditional measuring device, it can flexibly change the situation of the pipeline, conveniently and quickly measure the parameters of different pipelines when the centrifugal pump is in normal use, and the measurement range is increased.

In order to measure the parameters of the water pump when cavitation occurs, the top of the water tank 2 is connected to a vacuum device, and the vacuum device includes a vacuum pump 9, and the water tank 2 and the vacuum pump 9 are connected by a vacuum device tube 10, and the water tank 2 is installed The water tank inlet pipe 18 and the vacuum device pipe 10 are connected to install the valve group. When needing to carry out cavitation test, start vacuum pump 9, reduce the pressure in the device, to reach the environment when cavitation occurs, after the test ends, open the water tank inlet pipe 18 to restore the environment in the device. The invention can complete the task of measuring the parameters of the water pump when the cavitation phenomenon occurs, does not need to replace a new measuring device during the measurement, and is convenient and quick to implement. Two vacuum pumps 9 are installed on the vacuum device pipe 10, and the two vacuum pumps 9 are connected in parallel. During use, one vacuum pump 9 can work alone, or two vacuum pumps 9 can work simultaneously. This structure can not only improve the vacuum degree in the device, but also can replace another vacuum pump 9 when a vacuum pump 9 fails, so as to ensure the normal operation of the test process.

The vacuum pump 9 adopts a reciprocating vacuum pump, a rotary vane vacuum pump, a Roots blower or a water ring vacuum pump. The vacuum pump 9 is preferably a water ring vacuum pump, and a first steam-water separator 11 is installed on the vacuum pump 9 . Because the extracted gas contains a large amount of moisture, after the extracted gas containing moisture passes through the first steam-water separator 11, the gas is discharged into the atmosphere after the steam-water separation, and the water remains in the vacuum pump 9 for use as circulating water. This can not only reduce the loss of test water and cause unnecessary waste, but also replenish circulating water for the water ring vacuum pump to ensure a suitable cavitation environment.

In order to measure the performance of the submersible pump, a submersible pump 12 is arranged in the water tank 2, and the submersible pump 12 is connected to the water inlet pipe 5 through a submersible pump pipe 13, and the submersible pump pipe 13 is connected to the valve group of the water inlet pipe 5 and the first collector On the pipeline between tank 3. When the submersible pump 12 needs to be measured, the valve group on the water inlet pipe 5 is closed, and a circuit is formed between the submersible pump 12, the water tank, the first collecting tank 3, the second collecting tank 4 and the main pipeline, and the water inlet pipe The temperature gauge 27 and the pressure gauge 28 on the 5, the water flow gauge 26 on the measuring tube 7 carry out test measurement to the performance of the submersible pump 12. The invention can not only measure the performance parameters of the centrifugal pump, but also can complete the test measurement of the submersible pump. The measurement switching is convenient and flexible, and can realize various pump test tasks.

In order to prevent the problem of outflow of test water and contamination of the test bench in the disassembly process after the end of the test, a backflow device is installed on the main road, and the backflow device includes a main pipe inlet pipe 17 and a second steam-water separator 14, and a valve is installed on the main pipe inlet pipe 17 group, the main pipeline and the second steam-water separator 14 are connected through the second steam-water separator inlet pipe 15, as shown in the figure, the second steam-water separator 14 is connected with the water inlet pipe 5, and the second steam-water separator 14 and the water tank 2 are connected through the outlet pipe 16 of the second steam-water separator, and valve groups are installed on the inlet pipe 15 of the second steam-water separator and the outlet pipe 16 of the second steam-water separator. After finishing the test, close the valve group on the water inlet pipe 5, open the valve group on the air inlet pipe 17 to ventilate in the device, open the second steam-water separator water inlet pipe 15 and install the valve group on the second steam-water separator water outlet pipe 16 simultaneously, The remaining test water is pressed into the second steam-water separator 14, the gas is discharged into the atmosphere, and the moisture returns to the water tank 2. The residual test water in the main pipeline has flowed back to the water tank 2, and no test water flows out during the disassembly process, ensuring the cleanliness of the test bench; no need to clean the test water during the disassembly process, which can improve the work efficiency during disassembly; There will be a loss of test water due to the disassembly process.

The valve group is composed of a manual valve and an electric regulating valve or an electric valve and an electric regulating valve. The manual valve is low in cost, easy to install and maintain; the electric valve is convenient and fast to use, and can realize remote switching, which is convenient for test operation; the electric control valve can be adjusted accurately, which can ensure the stability of the test process and the accuracy of the test data.

In order to ensure the safety of the test process, the water tank 2, the first collecting tank 3 and the second collecting tank 4 are equipped with a water tank release valve 19, a first collecting tank release valve 20 and a second collecting tank respectively. Tank deflation valve 21; Safety valve 22 is installed on the water tank 2. A check valve 24 is installed on the main pipeline inlet pipe 17 and the second steam-water separator outlet pipe 16 .

A spare valve group 23 is installed on the water tank 2, and when the valve group on the water inlet pipe 5 breaks down, it is ensured that the test process is normally carried out by connecting the spare valve group 23.

In order to facilitate the calculation of the control and measurement results, the valve group, the measuring device and the water pump are connected to the control device, and the control device is composed of an upper computer and a lower computer. The lower computer adopts PLC, which is connected with the relay, valve group and measuring device of the water pump through the output interface of each module; the upper computer adopts a computer with test software installed, which can obtain the data of the measuring device of the lower computer, display the equipment operation status and parameter setting , data storage, and drawing curves, and control the opening and closing of the valve device and the water pump through the lower computer.

The technical solutions of the present invention are not limited within the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims (1)

1. pump class testing system closed line system device, it is characterized in that: comprise water pot (2), centrifugal pump (1), the first afflux tank (3) and the second afflux tank (4), connected by intake pipe (5) between water pot (2) and centrifugal pump (1), connected by outlet pipe (6) between centrifugal pump (1) and the first afflux tank (3), connected by several sounding pipe (7) between first afflux tank (3) and the second afflux tank (4), in parallel between each sounding pipe (7), connected by return pipe (8) between the second afflux tank (4) and water pot (2); Mounted valve group respectively on intake pipe (5), outlet pipe (6), sounding pipe (7) and return pipe (8), (7) install and measure device for intake pipe (5), outlet pipe (6), sounding pipe; Intake pipe (5), outlet pipe (6) and return pipe (8) are main line; Arrange submersible pump (12) in water pot (2), be connected between submersible pump (12) with intake pipe (5) by pump line (13) of diving under water, diving pump line (13) is connected on the pipeline between the valve sets of intake pipe (5) and the first afflux tank (3); Main line installs reflux, described reflux comprises main line suction tude (17) and the second steam-water separator (14), the upper mounted valve group of main line suction tude (17), connected by the second steam-water separator intake pipe (15) between main line and the second steam-water separator (14), connected by the second steam-water separator outlet pipe (16) between second steam-water separator (14) and water pot (2), the second steam-water separator intake pipe (15) and/or the upper mounted valve group of the second steam-water separator outlet pipe (16); Water pot (2) top connects vacuum pumping device, described vacuum pumping device comprises vacuum pump (9), connected by vacuum system pipe (10) between water pot (2) and vacuum pump (9), water pot (2) is upper installs water pot suction tude (18), the upper mounted valve group of vacuum system pipe (10); Described vacuum pump (9) is Nash hytor, upper installation first steam-water separator (11) of vacuum pump (9); Described water pot (2), the first afflux tank (3) and the second afflux tank (4) are installed respectively water pot bleed valve (19), the first afflux tank bleed valve (20) and the second afflux tank bleed valve (21); The upper mounting safety valve (22) of water pot (2).