CN113153725A - Water pump testing system and method - Google Patents
Water pump testing system and method Download PDFInfo
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- CN113153725A CN113153725A CN202110459300.6A CN202110459300A CN113153725A CN 113153725 A CN113153725 A CN 113153725A CN 202110459300 A CN202110459300 A CN 202110459300A CN 113153725 A CN113153725 A CN 113153725A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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Abstract
The invention relates to a water pump testing system and a water pump testing method, which comprise a water storage device arranged in a sealing mode, wherein the water storage device is connected to the downstream of a tested water pump, the tested water pump pumps water from a water source and discharges the water to the water storage device, and gas with adjustable air pressure is connected to the water storage device so as to form adjustable back pressure on the downstream of the tested water pump. Through gaseous output in water storage device to form the backpressure environment at being surveyed the water pump rear end, because the gaseous output of air supply and air-vent valve is very stable, can not receive the influence of being surveyed the water pump factor of self, even change different being surveyed the water pump, also can form unanimous backpressure environment, and the testing process can full automation, and efficiency of software testing is high.
Description
Technical Field
The invention relates to a water pump testing system and a water pump testing method, in particular to a water pump testing system and a water pump testing method capable of providing adjustable back pressure by using gas pressure.
Background
The parameters of the micro-pump are affected by the Back Pressure (Back Pressure), and for an acceptable micro-pump, the required product has suitable parameters (such as flow or rotation speed) at different Back pressures. Therefore, in the product testing process, a variable backpressure environment is generally prepared for the micro water pump, and a backpressure-parameter curve of the micro water pump is tested, so as to judge whether the product meets the qualified standard. A micro water pump testing system in the prior art is shown in figure 1, a tested water pump 2 pumps water from a water tank 1, a pressure gauge 3 is connected to the rear end of the tested water pump 2 to test back pressure of the tested water pump, a throttle valve 4 is connected in series at the downstream of the tested water pump 2, the flow of the water is adjusted by manually adjusting the opening of the throttle valve 4, the back pressure is adjusted to a required value, and then a beaker 5 is used for bearing the water flow at a water outlet in a specified time to test the flow of the micro water pump. However, such existing testing devices have certain drawbacks, mainly in that:
1. because the flow of the pump is different, the mode of generating back pressure by controlling the flow by the throttle valve is influenced by the difference of the pump, and when the next product to be tested is changed after one product is tested, the throttle valve is usually required to be adjusted again to obtain the required back pressure value;
2. the process of manually adjusting the throttle valve is complicated, the back pressure can be adjusted within a proper range by often adjusting for many times, the time is long, and the test efficiency is low;
3. when the micro pump with larger flow difference is used, the throttle valves with different specifications are required to be replaced, and the flow coefficients of the throttle valves with different specifications are different, so that the measurement error is increased.
In summary, the backpressure of the micropump is formed by controlling the flow rate downstream through the throttle valve, and the backpressure of the micropump fluctuates greatly, and is not accurate and stable enough. In the production test process, if the adjustment of backpressure is required to be carried out on each product to be tested, the test efficiency is low, the fluctuation range of the backpressure is widened, and the defective products are easy to flow out.
Disclosure of Invention
Therefore, in order to solve the above problems, the present invention provides an optimized water pump testing system and method.
The invention is realized by adopting the following technical scheme:
the invention provides a water pump testing system which is used for forming back pressure on a tested water pump in a working state and carrying out parameter testing on the tested water pump.
Preferably, in order to measure the flow rate of the measured water pump under different back pressures, a flow meter is arranged on a connecting pipeline between the measured water pump and the water storage device, or a weighing device is further arranged, and the weighing device is used for weighing the weight of the water storage device, so that the flow rate of the measured water pump under different back pressures is measured.
Preferably, a pressure gauge is connected to the water storage device to observe the back pressure of the water pump to be detected.
Preferably, a liquid level meter is mounted on the water storage device to observe the liquid level height in the water storage device.
Preferably, the water storage device is provided with a pressure relief device to exhaust the pressure in the water storage device.
Preferably, a circulating device is further arranged between the water storage device and the water source, the circulating device comprises a circulating water pump and a switch valve, and water in the water storage device is pumped back to the water source by opening the switch valve and the circulating water pump.
Preferably, the water pump testing system further comprises a rotating speed monitoring system, and the rotating speed monitoring system is used for monitoring the rotating speed of the tested water pump under different back pressures.
In a preferred embodiment, the water pump testing system further comprises a gas source and at least two gas channels connected to the water storage device from the gas source, each gas channel is provided with a switch valve and a gas pressure stabilizing valve with set output gas pressure, and the gas with adjustable gas pressure is formed by opening the switch valve of one or more gas channels.
In another preferred embodiment, the water pump testing system further comprises a gas source and a gas channel connected from the gas source to the water storage device, the gas channel is provided with a switch valve and an automatic pressure regulating valve capable of regulating the pressure of output gas, and the gas with the adjustable pressure is formed by regulating the automatic pressure regulating valve.
The invention also provides a water pump testing method, which comprises the following steps:
a, providing hardware measures: providing a water source for the tested water pump to pump water at the front end of the tested water pump, connecting the rear end of the tested water pump into a sealed water storage device, and simultaneously providing a gas source with adjustable output gas pressure to be connected into the water storage device; providing a pressure detection means to detect the real-time pressure in the water storage device;
b, executing a testing step: starting the water pump to be measured to drain water to the water storage device, adjusting the air pressure output by the air source to a specific value to form back pressure at the rear end of the water pump to be measured, and measuring parameters of the water pump to be measured under the specific back pressure;
and C, obtaining and processing data of the tested water pump under the specific back pressure, and judging whether the tested water pump is qualified.
The invention has the following beneficial effects: the invention forms a back pressure environment at the rear end of the tested water pump by outputting the gas in the water storage device, and because the gas output of the gas source and the pressure regulating valve is very stable and cannot be influenced by the factors of the tested water pump, even if different tested water pumps are replaced, a consistent back pressure environment can be formed, and the testing process can be fully automatic, and the testing efficiency is extremely high.
Drawings
FIG. 1 is a schematic diagram of a prior art water pump testing system;
FIG. 2 is a schematic view of a water pump test system in example 1;
FIG. 3 is a graph (Q) of "back pressure-flow" and a graph (I) of "back pressure-current" obtained by a water pump of one specification under the water pump test system of example 1;
FIG. 4 is a schematic view of a water pump test system in example 2;
FIG. 5 is a schematic perspective view (Angle one) of the water pump test system of example 2;
fig. 6 is a schematic perspective view (angle two) of the water pump test system in example 2.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
Example 1:
referring to fig. 2, as a preferred embodiment of the present invention, there is provided a water pump testing system, which includes a tested water pump 2 and a pressure water tank 11, wherein the pressure water tank 11 is hermetically connected to the downstream of the tested water pump 2, and the tested water pump 2 pumps water from a water tank 1 and discharges the water to the pressure water tank 11 through a connecting pipeline. The water pump device also comprises an air source 7, wherein the air source 7 is provided with two air channels connected into the pressure water tank 11, a first air pressure regulating valve 6 and a first switch valve 5 are arranged on the first air channel, a second air pressure regulating valve 8 and a second switch valve 9 are arranged on the second air channel, and air is connected into the pressure water tank 11 through the first air channel and the second air channel, so that the back pressure at the downstream of the water pump 2 to be detected is formed.
The pressure gauge 4 is connected to the pressure water tank 11 to observe the real-time pressure in the pressure water tank 11 (i.e. the back pressure of the water pump 2 to be measured). A liquid level meter 10 is also installed on the pressure water tank 11 to observe the liquid level inside the pressure water tank 11. And, still be provided with circulating device between pressure water tank 11 and basin 1, circulating device includes third ooff valve 12 and circulating pump 13, and when the liquid level in pressure water tank 11 reached a take the altitude, can start circulating device, opens third ooff valve 12 promptly, starts circulating pump 13 to draw the water in pressure water tank 11 back basin 1, in order to prevent that the water level in pressure water tank 11 is too high, and can also reuse the water resource. In addition, when the water pump test system stops operating, the circulating device may be started to drain the water in the pressure water tank 11.
The pressure water tank 11 is also connected with a pressure release valve 3, when the water pump test system stops operating, residual pressure in the pressure water tank 11 can be exhausted by opening the pressure release valve 3, and accuracy of backpressure data is guaranteed after the water pump test system is opened again.
A Flow meter (Flow meter) may be provided on a connection line between the water pump 2 to be measured and the pressure water tank 11 to measure the Flow rate of the water pump 2 to be measured. In addition, a weighing device can be optionally arranged for weighing the weight of the pressure water tank 11 and then measuring the flow rate of the water pump 2 to be measured through density conversion. The parameters such as the rotation speed of the water pump 2 to be measured can be obtained by a monitoring system, for example, conventionally using various electromagnetic, hall or photoelectric sensors to measure the rotation speed signal and then output a feedback signal, which is a common and mature technology in a control system, and this embodiment is not further described.
The first gas pressure regulating valve 6 and the second gas pressure regulating valve 8 are pressure stabilizing valves with preset output pressure, and when the first switch valve 5 is opened, gas of a first gas channel is connected into the pressure water tank 11 to reach a first preset back pressure; then, in a state where the first switching valve 5 is opened, the second switching valve 6 is opened, and the gas of the second gas channel is introduced into the pressure water tank 11 to reach a second preset back pressure. In application, three or four gas channels can be arranged according to actual needs, and the change of the back pressure is formed by opening the switch valve of one or more gas channels. The specific backpressure numerical value set each time and the number of times of collection can be flexibly set. By adjusting a plurality of back pressure values and measuring the flow or the rotating speed of the water pump 2 to be measured, the back pressure-flow curve or the back pressure-rotating speed curve of the water pump 2 to be measured can be obtained, and whether the actual parameters of the water pump 2 to be measured meet the specification or not is judged. Through the output of gas in the pressure water tank 11, thereby form the back pressure environment behind the water pump 2 under test, its advantage lies in: firstly, the gas output of the gas source 7 and the pressure regulating valve is stable and cannot be influenced by the factors of the water pump 2 to be measured, and even if different water pumps 2 to be measured are replaced, a consistent back pressure environment can be formed; secondly, the testing process can be fully automated, and only the control system is used for controlling the opening and closing of each switch valve, so that the testing efficiency is extremely high. In this embodiment, the first gas pressure regulating valve 6 and the second gas pressure regulating valve 8 are pressure stabilizing valves with preset output pressures, so that the set back pressure value at the rear end of the water pump is also a fixed number of values, and the method is more suitable for testing a plurality of water pumps in the same batch and model.
The gas of the gas source 7 may be air, Clean air (Clean air), nitrogen, or the like; the pressure water tank 11 is used as a water storage device, and in other embodiments, it may be other water storage devices of any shape and structure, such as a water tank, a water bucket, etc., but because the requirement of the sealing property is high, and the capacity requirement is also large to contain enough water, the embodiment preferably uses the pressure water tank as a specific implementation structure.
As shown in fig. 3, a "back pressure-flow" graph (Q) and a "back pressure-current" graph (I) obtained by the water pump of one specification under the water pump testing system of the present embodiment are shown, in the graph, the abscissa is the back pressure (pressure), the two ordinates are respectively the measured water pump flow (flow) and the current (current) when the water pump operates, and the current value is inversely proportional to the rotation speed of the water pump, so that the rotation speed of the water pump can be obtained through conversion.
Example 2:
referring to fig. 4, the present embodiment provides another water pump testing system, which has a structure substantially similar to that of the water pump testing system in embodiment 1, and also includes the structures of the water tank 1, the water pump 2 to be tested, the pressure relief valve 3, the pressure gauge 4, the gas source 7, the liquid level meter 10, the pressure water tank 11, the third on-off valve 12, and the circulation pump 13 in embodiment 1, and has the same technical effects as those of the structure of the embodiment 1, and the present embodiment is different from embodiment 1 in that the gas source 7 only has one gas passage leading into the pressure water tank 11, the gas passage is provided with the automatic pressure regulating valve 15 and the fourth on-off valve 14, the automatic pressure regulating valve 15 can automatically regulate the output gas pressure, and specifically, a proportional pressure reducing valve, a pneumatic pressure regulating valve, and the like can be adopted. The gas source 7 is regulated by the automatic pressure regulating valve 15 and then is input into the pressure water tank 11, so that the back pressure at the rear end of the water pump 2 to be measured is formed. Compared with the embodiment 1, the automatic pressure regulating device simplifies a plurality of gas channels into one gas channel, and the automatic pressure regulating valve 15 can remotely and electrically control the automatic pressure regulating valve 15 to automatically regulate the pressure, so that the automation degree of the test system is further improved, and the back pressure is regulated more flexibly.
Fig. 5-6 show the perspective view of the present embodiment (the pressure gauge 4, the circulating pump 13 and the air source 7 are not shown, and can be freely connected to the proper positions), the water pump 2 to be tested pumps water from the water tank 1 through the water inlet pipe 100, and discharges water to the pressure water tank 11 through the water outlet pipe 200, and the automatic pressure regulating valve 15 and the fourth switch valve 14 cooperate to regulate the output air pressure.
Example 3:
based on the water pump test system of embodiments 1 and 2 being a preferred hardware basis, this embodiment further provides a method for water pump test, including the following steps:
a, providing hardware measures: providing a water source for the tested water pump to pump water at the front end of the tested water pump, connecting the rear end of the tested water pump into a sealed water storage device, and simultaneously providing a gas source with adjustable output gas pressure to be connected into the water storage device; providing a pressure detection means to detect the real-time pressure in the water storage device;
b, executing a testing step: starting the water pump to be measured to drain water to the water storage device, adjusting the air pressure output by the air source to a specific value to form back pressure at the rear end of the water pump to be measured, and measuring parameters of the water pump to be measured under the specific back pressure;
and C, obtaining and processing data of the tested water pump under the specific back pressure, and judging whether the tested water pump is qualified.
The hardware measures in step a are preferably implemented but not limited to the implementation structures in embodiments 1 and 2, for example, the water storage device may be a pressure water tank, but may also be a sealed water tank; if the pressure detection means can be a pressure gauge connected to the water storage device, but also can be a pressure sensor for outputting a feedback value; the regulation of the output pressure of the gas source can be realized by opening and closing a plurality of gas channels in the embodiment 1, and also can be realized by regulating a pressure regulating valve on one gas channel in the embodiment 2. In step B, the parameters of the water pump to be tested, which are measured according to the requirement, may be monitored according to the actual requirement, and the parameters may be the rotation speed, the flow rate, and the like of the water pump, and the specific test method may be implemented by using the prior art, for example, a method of testing with a flow meter or a weighing device is proposed in embodiment 1 for the flow rate test. On the basis of the method provided by the embodiment, the water pump test is realized by using hardware with any structure and form, which is a feasible scheme.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a water pump test system for to being surveyed the water pump under the operating condition and forming backpressure, and to being surveyed the water pump and carry out parametric test, its characterized in that: the device comprises a water storage device which is arranged in a sealing mode, wherein the water storage device is connected to the downstream of a tested water pump, the tested water pump pumps water from a water source and discharges water to the water storage device through a connecting pipeline, and gas with adjustable air pressure is connected to the water storage device so that adjustable back pressure is formed on the downstream of the tested water pump.
2. The water pump testing system of claim 1, wherein: and a flow meter is arranged on a connecting pipeline between the water pump to be measured and the water storage device so as to measure the flow of the water pump to be measured under different back pressures.
3. The water pump testing system of claim 1, wherein: the water storage device is used for storing water, and the weight of the water storage device and the water storage device.
4. The water pump testing system of claim 1, wherein: the water storage device is connected with a pressure gauge to observe the back pressure of the water pump to be detected.
5. The water pump testing system of claim 1, wherein: the water storage device is provided with a pressure relief device to exhaust the pressure in the water storage device.
6. The water pump testing system of claim 1, wherein: a liquid level meter is arranged on the water storage device to observe the liquid level height in the water storage device; and a circulating device is also arranged between the water storage device and the water source, the circulating device comprises a circulating water pump and a switch valve, and water in the water storage device is pumped back to the water source by opening the switch valve and the circulating water pump.
7. The water pump testing system of claim 1, wherein: the water pump rotating speed monitoring system is used for monitoring the rotating speed of the water pump to be detected under different back pressures.
8. The water pump testing system of any of claims 1-7, wherein: the water storage device is characterized by further comprising a gas source and at least two gas channels connected to the water storage device from the gas source, wherein each gas channel is provided with a switch valve and a gas pressure stabilizing valve with set output gas pressure, and the gas with adjustable gas pressure is formed by opening the switch valve of one or more gas channels.
9. The water pump testing system of any of claims 1-7, wherein: the water storage device is characterized by further comprising a gas source and a gas channel connected to the water storage device from the gas source, wherein a switch valve and an automatic pressure regulating valve capable of regulating the pressure of output gas are arranged on the gas channel, and the gas with the adjustable gas pressure is formed by regulating the automatic pressure regulating valve.
10. A water pump test method is characterized in that: the method comprises the following steps:
a, providing hardware measures: providing a water source for the tested water pump to pump water at the front end of the tested water pump, connecting the rear end of the tested water pump into a sealed water storage device, and simultaneously providing a gas source with adjustable output gas pressure to be connected into the water storage device; providing a pressure detection means to detect the real-time pressure in the water storage device;
b, executing a testing step: starting the water pump to be measured to drain water to the water storage device, adjusting the air pressure output by the air source to a specific value to form back pressure at the rear end of the water pump to be measured, and measuring parameters of the water pump to be measured under the specific back pressure;
and C, obtaining and processing data of the tested water pump under the specific back pressure, and judging whether the tested water pump is qualified.
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| CN202110459300.6A CN113153725B (en) | 2021-04-27 | 2021-04-27 | Water pump testing system and method |
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