CN112943637A - Test board for foreign matter discharge of water pump and test statistical method - Google Patents
Test board for foreign matter discharge of water pump and test statistical method Download PDFInfo
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- CN112943637A CN112943637A CN202110176286.9A CN202110176286A CN112943637A CN 112943637 A CN112943637 A CN 112943637A CN 202110176286 A CN202110176286 A CN 202110176286A CN 112943637 A CN112943637 A CN 112943637A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
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Abstract
The invention discloses a water pump foreign matter discharging test board and a test statistical method, wherein the water pump foreign matter discharging test board comprises a support, a foreign matter discharging bucket is fixedly arranged at the top of the support, a water inlet pipe used for being connected with a water inlet of a water pump to be tested is arranged at the lower port of the foreign matter discharging bucket, a water inlet valve is arranged on the water inlet pipe, a foreign matter placing water pipe is fixed in the foreign matter discharging bucket, the lower port of the foreign matter placing water pipe is opposite to the lower port of the foreign matter discharging bucket, a water discharging pipe and a water pump mounting assembly used for placing the water pump to be tested are arranged on the support, one end of the water discharging pipe is connected with a water outlet of the water pump to be tested. The invention provides a water pump foreign matter discharging test board and a test statistical method, overcomes the defects of the existing water pump foreign matter discharging capability evaluation mode, and designs the water pump foreign matter discharging test board which is simple in structure, convenient and fast to operate and high in universality.
Description
Technical Field
The invention relates to a test board for foreign matter discharge of a water pump and a test statistical method, in particular to research and development evaluation of miniature discharge pumps used for household appliances such as various brands and different models of washing machines, dish washing machines and the like, and belongs to the technical field of auxiliary research and development of liquid pumps.
Background
At present, the existing miniature drainage pump used for household appliances such as washing machines or dish washing machines and the like can cause that the water pump can not drain water after the impeller is wound or blocked by foreign matters in operation because of the existence of various possible foreign matters such as coins, hairpins, buttons, clip pins, toothpicks, cotton threads, shoelaces, nipples, baby socks, screws, rubber bands, cotton balls, thin necklaces and the like in the actual working environment, which is also one of the bad problems of the water pump in the market that much complaints are caused.
For solving the above-mentioned bad problem, current water pump has two kinds of structures to supply the selection: A. the single water pump shell is provided with only one water inlet and one water outlet after being connected with the motor part, and the water pumps mainly evaluate the discharge capacity of the pump to foreign matters; B. the pump shell of the combined water pump is characterized in that a detachable filter is additionally arranged in the pump shell, and the water pump mainly evaluates the filtering capacity of the pump on foreign matters.
The existing evaluation on the foreign matter discharging capacity of a water pump mainly depends on the fact that the water pump is arranged on different washing machines and dish washing machines and then respectively tests the foreign matter discharging capacity after the water pump is arranged on the different washing machines and dish washing machines, the existing evaluation mainly depends on the fact that the water pump is arranged on the different washing machines and dish washing machines, the existing evaluation needs to be matched with a large number of washing machines and dish washing machines, the operation of putting, collecting, position confirmation and the like of foreign matters is inconvenient during actual testing, and a large amount of material resources.
The method for evaluating the foreign matter discharging capacity of the water pump only carries out qualitative evaluation on various foreign matters, and can not carry out quantitative comparison on the foreign matter discharging capacity of various water pumps, so that the method has little guiding significance on the definition of product performance indexes in the research and development stage of the water pump and the evaluation of the capacity improvement after the product performance is improved in the batch production stage of the water pump.
Disclosure of Invention
The invention aims to solve the technical problems that the defects of the prior art are overcome, the water pump foreign matter discharging test board and the test statistical method are provided, the defects of the existing water pump foreign matter discharging capability evaluation mode are overcome, and the water pump foreign matter discharging test board with simple structure, convenience in operation and strong universality is designed; and the method is combined with a new method for quantitatively evaluating the foreign matter discharge capacity index of the water pump, so that the problem that the foreign matter discharge capacity of the water pump can only be qualitatively evaluated in the traditional method can be effectively solved.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a foreign matter discharging test board of a water pump comprises a bracket, a foreign matter discharging bucket is fixedly arranged at the top of the bracket, the lower port of the foreign matter discharging bucket is provided with a water inlet pipe used for connecting a water inlet of a water pump to be detected, the water inlet pipe is provided with a water inlet valve, a foreign matter inlet pipe is fixed in the foreign matter discharge bucket, the lower port of the foreign matter inlet pipe is over against the lower port of the foreign matter discharge bucket, the bracket is provided with a drain pipe and a water pump mounting component for placing a water pump to be measured, one end of the drain pipe is connected with the water outlet of the water pump to be measured, the other end of the drain pipe extends into the foreign matter discharging bucket, a foreign matter discharging screen is welded on the inner wall of the foreign matter discharging bucket, the foreign matter discharge screen is located under the outlet end of the drain pipe, an air inlet pipe is externally connected to a pipeline of the water inlet pipe, the pipeline is located on the water outlet side of the water inlet valve, and an air inlet valve is arranged at an air inlet of the air inlet pipe.
Further, the water pump installation component comprises a water tank, a water tank screen separation plate and a drain valve, the water tank is fixed on the support, the installation position of the water tank on the support is lower than a lower port of the foreign matter discharge bucket, the water tank screen separation plate is arranged on the water tank, the water tank screen separation plate is used for placing a water pump to be tested, and the drain valve is arranged at the bottom of the water tank.
Further, the bottom of the foreign matter discharge bucket is inclined funnel-shaped, and the lower port of the foreign matter discharge bucket is positioned in the center of the funnel.
Further, the air inlet of the air inlet pipe is used for being connected with an air booster pump.
Further, the foreign matter inlet pipe is vertically fixed on the inner wall of the foreign matter discharge bucket in a cross bracket welding mode in a suspension mode, an inlet is put into the foreign matter at the upper end opening of the foreign matter inlet pipe, and the upper end opening of the foreign matter inlet pipe extends out of the upper part of the water surface in the foreign matter discharge bucket.
Further, the bottom of support is provided with the universal wheel.
Further, a tray is arranged at the top of the support.
Furthermore, the water outlet of the water inlet pipe on the water outlet side of the water inlet valve can be connected with a rubber hose, and water pumps to be tested with different structural specifications can be conveniently and quickly disassembled and assembled between the rubber hose and the water outlet pipe.
A statistical method for testing a test bench for foreign matter discharged by a water pump comprises the following steps:
step S1, selecting one of n different types of foreign matters, putting the selected foreign matter into a foreign matter inlet pipe of a foreign matter discharging test board of a water pump, opening a water inlet valve, switching on a power supply to enable the water pump to be tested to normally operate, observing whether the foreign matters are discharged from the water pump to be tested into a foreign matter discharge screen, and calculating the single-foreign matter single-discharge capacity P of the single foreign matteriThe score of (3) is obtained, each foreign matter is tested for 10 times, and the average score of the 10 tests is taken to obtain the single foreign matter discharge capacity index of the water pump to be tested for one foreign matter
The single foreign matter discharge ability index
Expressed by the formula:
step S2, after testing n different kinds of foreign bodies, testing the single foreign body discharge ability index of n kinds of foreign bodies
Then the average value is taken to obtain the comprehensive rejection capacity index of the water pump to be measured
The comprehensive rejection capacity index
Expressed by the formula:
further, the single foreign matter discharge capacity P in step S1iThe calculating method comprises the following steps:
step S11, if the foreign matter is discharged from the water pump to be measured to the foreign matter discharging screen within 10 seconds, 10 minutes, namely P is obtainedi＝10；
Step S12, if the foreign matter can not be discharged from the water pump to be measured within 10 seconds, the air inlet valve is opened to ventilate the air inlet pipe for 3 seconds, then the time is counted, if the foreign matter is discharged into the foreign matter discharge sieve within 10 seconds, 9 minutes is obtained, namely Pi＝10-1；
Step S13, if the foreign matter is not discharged after step S12, the power of the water pump to be tested is cut off, the water pump to be tested is started again after waiting for 3 seconds and powered on for 10 seconds, and if the foreign matter can be discharged, 8 minutes is obtained, namely Pi＝10-1-1；
Step S14, the operation process of the steps S12-S13 is repeated for 5 times at most, if the water pump to be tested is blocked and does not drain water during the repeated period, the score is 0, namely Pi＝0。
By adopting the technical scheme, the foreign matter discharge capacity of the water pump can be quickly and effectively evaluated by simulating household appliances such as a washing machine through the foreign matter discharge bucket, the water inlet valve, the water inlet pipe and the water discharge pipe and combining a simple and effective test statistical method. The water pump foreign matter discharging test board of the invention is convenient for installing water pumps with various structural sizes, is convenient for placing various foreign matters in the test process and can collect the discharged foreign matters in time to repeat and test quickly, so as to replace the mode of installing the water pumps on washing machines with different models for machine installation evaluation, thereby greatly reducing the research and development cost of products and shortening the research and development period.
Drawings
FIG. 1 is a front view of a pump foreign object discharge test stand according to the present invention;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a top view of fig. 1.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example one
As shown in fig. 1 to 3, the present embodiment provides a test bench for discharging foreign matters from a water pump, which includes a support 10, a foreign matter discharging bucket 1 is fixedly disposed on the top of the support 10, and the foreign matter discharging bucket 1 can simulate a water container of a household appliance such as a washing tub of a washing machine. The lower port of the foreign matter discharging bucket 1 is provided with a water inlet pipe 6 used for connecting a water inlet of a water pump 7 to be detected, the bottom of the foreign matter discharging bucket 1 is in a slope funnel shape, the lower port of the foreign matter discharging bucket 1 is positioned in the center of a funnel, and water flow and foreign matters can enter the water inlet pipe 6 conveniently. The water inlet pipe 6 is generally a straight pipe or a rubber corrugated pipe, the water inlet valve 5 is arranged on the water inlet pipe 6, and the water inlet valve 5 is convenient for switching water inlet when the water pump 7 to be tested is installed, tested and disassembled. A foreign matter placing water pipe 2 is fixed in the foreign matter discharging bucket 1, the foreign matter placing water pipe can accurately and quickly place foreign matters into a water pump 7 to be detected, the lower port of the foreign matter placing water pipe 2 is opposite to the lower port of the foreign matter discharging bucket 1, the foreign matter placing water pipe 2 is vertically fixed on the inner wall of the foreign matter discharging bucket 1 in a suspension mode in a cross-shaped support welding mode, the upper port of the foreign matter placing water pipe 2 is a foreign matter placing inlet, the upper port of the foreign matter placing water pipe 2 extends out of the water surface above the inside of the foreign matter discharging bucket 1, the lower port of the foreign matter placing water pipe 2 is opposite to the center of a funnel of the foreign matter discharging bucket 1, and the foreign matter placing water pipe is highly. Be provided with drain pipe 4 and be used for placing the water pump installation component of the water pump 7 that awaits measuring on the support 10, drain pipe 4 generally uses the special bellows of washing machine, and the one end of drain pipe 4 links to each other with the delivery port of the water pump 7 that awaits measuring, and the other end of drain pipe 4 stretches into in the foreign matter drainage cask 1, and on drain pipe 4 accessible ribbon was vertically fixed in support 10, the exit position of drain pipe 4 can be according to actual household electrical appliances state height-adjusting. The inner wall of the foreign matter discharging bucket 1 is welded with a foreign matter discharging screen 3, and the foreign matter discharging screen 3 is positioned under the outlet end of the drain pipe 4, so that the foreign matters can be conveniently and timely collected after being discharged. The pipeline of the water inlet pipe 6, which is positioned on the water outlet side of the water inlet valve 5, is externally connected with an air inlet pipe 13, the air inlet of the air inlet pipe 13 is connected with an air booster pump, the air inlet of the air inlet pipe 13 is provided with an air inlet valve 61, the air booster pump is used for ventilating the air inlet pipe 6, and the water-air mixing state of household appliances such as a washing machine and the like during water drainage can be.
As shown in fig. 1, the water pump mounting assembly includes a water tank 9, a water tank screen separator 12 and a drain valve 8, the water tank 9 is fixed on a bracket 10, and the mounting position of the water tank 9 on the bracket 10 is lower than the lower port of the foreign matter draining water barrel 1 and can be used for collecting test residual water when the water pump 7 to be tested is dismounted. The water tank screen mesh partition 12 is arranged on the water tank 9, the water tank screen mesh partition 12 is used for placing the water pump 7 to be detected, and the water pump 7 to be detected and residual water in the water tank 9 can be isolated to avoid the water pump 7 to be detected from being soaked. The drain valve 8 is arranged at the bottom of the water tank 9 and can be used for discharging test residual water when the water pump 7 to be tested is disassembled and assembled.
As shown in fig. 1, the bottom of the stand 10 is provided with universal wheels 14 for easy movement of the entire test bench.
As shown in fig. 2 and 3, a tray 11 is disposed on the top of the bracket 10 for placing foreign matters for testing.
As shown in fig. 1 and 2, the water outlet of the water inlet pipe 6 on the water outlet side of the water inlet valve 5 can be connected with a rubber hose, and the water pumps 7 to be tested with different structural specifications can be conveniently and quickly disassembled and assembled between the rubber hose and the water outlet pipe 4.
The water pump foreign matter discharging test board in the embodiment mainly simulates household appliances such as a washing machine by using the foreign matter discharging bucket 1, the water inlet valve 5, the water inlet pipe 6 and the drain pipe 4, the water pump 7 to be tested is respectively connected with the water inlet pipe 6 and the drain pipe 4 during testing, the water inlet valve 5 is opened, the power supply of the water pump 7 to be tested is connected to enable the water pump 7 to be tested to normally work and discharge water, various foreign matters are put into the foreign matter discharging bucket 1 from the foreign matter inlet pipe 2, the foreign matters can conveniently and directly enter the water pump 7 to be tested, and the foreign matters are directly discharged into the foreign matter discharging screen 3 through. If the foreign matters are not smoothly discharged to the foreign matter discharge screen 3 in the test process, the whole test system can be inflated through the external air inlet pipe 13, the foreign matters in the test system are tested again after being stirred by simulating the water-air mixing state, and finally the foreign matter discharge capacity or the filtration capacity of the water pump 7 to be tested is judged according to the position where the foreign matters stay and by combining an effective test statistical method.
According to the foreign matter discharge testing process, convenient and fast repeated testing can be realized on various different foreign matters, so that the foreign matter discharge capacity of the water pump can be evaluated quickly and effectively, the research and development period of the water pump is greatly shortened, and the research and development cost is reduced.
Example two
A statistical method for testing a test bench for foreign matter discharged by a water pump comprises the following steps:
step S1, selecting one of n different types of foreign matters, such as coins, hairpins, buttons, clip pins, toothpicks, cotton threads, shoelaces, nipples, baby socks, screws, rubber bands, cotton balls, fine necklaces and the like, putting the foreign matters into a water pipe 2 of a water pump foreign matter discharge test bench, opening a water inlet valve 5, switching on a power supply to enable a water pump 7 to be tested to normally run under a specified voltage, observing whether the foreign matters are discharged from the water pump 7 to be tested into a foreign matter discharge screen 3 or not, and calculating the single foreign matter discharge capacity P of a single foreign matteriScore of (a);
single foreign matter discharge capability P in step S1iThe calculating method comprises the following steps:
in step S11, if the foreign matter is discharged from the water pump 7 to be measured into the foreign matter discharge screen 3 within 10 seconds, 10 minutes, i.e., P is obtainedi＝10；
Step S12, if the foreign matter is not discharged from the water pump 7 to be measured within 10 seconds, the air inlet valve 61 is opened to introduce air into the air inlet pipe 13 for 3 seconds and then the timer is started, and if the foreign matter is discharged into the foreign matter discharge screen 3 within 10 seconds, 9 minutes, that is, P is obtainedi＝10-1；
Step S13, if the foreign matter is not discharged after the step S12, the power supply of the water pump 7 to be measured is cut off, the water pump 7 to be measured is started again after waiting for 3 seconds and is electrified for 10 seconds, and if the foreign matter can be discharged, 8 minutes is obtained, namely Pi＝10-1-1；
Step S14, the operation process of the steps S12-S13 is repeated for 5 times at most, if the water pump 7 to be tested is blocked and does not drain water during the repeated period, the score is 0, namely Pi＝0。
Performing 10 tests on each foreign matter, and obtaining the single foreign matter discharge capacity index of the water pump 7 to be tested for one foreign matter by taking the average score of the 10 tests
Index of single foreign matter discharge capability
Expressed by the formula:
wherein i represents the test times of each foreign matter, and i is 10, which means that each foreign matter is tested for 10 times;
the steps are specific to the single foreign matter discharge capacity index of one foreign matter
The complete test procedure of (1).
Step S2, after testing n different kinds of foreign bodies, testing the single foreign body discharge ability index of n kinds of foreign bodies
Then, the average value is taken to obtain the comprehensive rejection capability index of the water pump 7 to be measured
Index of comprehensive rejection capacity
Expressed by the formula:
where i ═ n means that n foreign substances were tested in total.
In summary, the quantitative index of the comprehensive foreign matter discharge capacity of the water pump is obtained by the test statistical method
The foreign matter discharging capacity of the water pump can be relatively accurately evaluated, and initial research and development, quality improvement and the like of the water pump can be better guided.
The technical problems, technical solutions and advantages of the present invention have been described in detail with reference to the above embodiments, and it should be understood that the above embodiments are merely exemplary and not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a foreign matter testboard is arranged to water pump which characterized in that: it comprises a bracket (10), the top of the bracket (10) is fixedly provided with a foreign matter discharging bucket (1), the lower port of the foreign matter discharging bucket (1) is provided with an inlet pipe (6) for connecting the water inlet of a water pump (7) to be tested, the inlet pipe (6) is provided with a water inlet valve (5), the foreign matter discharging bucket (1) is internally fixed with a foreign matter inlet pipe (2), the lower port of the foreign matter inlet pipe (2) is just opposite to the lower port of the foreign matter discharging bucket (1), the bracket (10) is provided with a drain pipe (4) and a water pump mounting component for placing the water pump (7) to be tested, one end of the drain pipe (4) is connected with the water outlet of the water pump (7) to be tested, the other end of the drain pipe (4) extends into the foreign matter discharging bucket (1), the inner wall of the foreign matter discharging bucket (1) is welded with a, the foreign matter discharge screen (3) is located under the outlet end of the drain pipe (4), an air inlet pipe (13) is externally connected to the pipeline, located on the water outlet side of the water inlet valve (5), of the water inlet pipe (6), and an air inlet valve (61) is arranged at the air inlet of the air inlet pipe (13).
2. A water pump foreign matter discharge test stand according to claim 1, wherein: the water pump mounting assembly comprises a water tank (9), a water tank screen partition plate (12) and a water drain valve (8), wherein the water tank (9) is fixed on a support (10), the mounting position of the water tank (9) on the support (10) is lower than the lower port of a foreign matter discharge bucket (1), the water tank screen partition plate (12) is arranged on the water tank (9), the water tank screen partition plate (12) is used for placing a water pump (7) to be tested, and the water drain valve (8) is arranged at the bottom of the water tank (9).
3. A water pump foreign matter discharge test stand according to claim 1, wherein: the bottom of the foreign matter discharging bucket (1) is inclined-plane funnel-shaped, and the lower port of the foreign matter discharging bucket (1) is located at the center of the funnel.
4. A water pump foreign matter discharge test stand according to claim 1, wherein: and an air inlet of the air inlet pipe (13) is used for being connected with an air booster pump.
5. A water pump foreign matter discharge test stand according to claim 1, wherein: the foreign matter is put into on water pipe (2) is fixed in the inner wall of foreign matter discharge bucket (1) through the unsettled vertical of cross support welding mode, the last port that water pipe (2) was put into to the foreign matter is the foreign matter and puts in the entry, the last port that water pipe (2) was put into to the foreign matter stretches out the surface of water top in foreign matter discharge bucket (1).
6. A water pump foreign matter discharge test stand according to claim 1, wherein: the bottom of the support (10) is provided with universal wheels (14).
7. A water pump foreign matter discharge test stand according to claim 1, wherein: the top of the bracket (10) is provided with a tray (11).
8. A water pump foreign matter discharge test stand according to claim 1, wherein: the water outlet of the water inlet pipe (6) at the water outlet side of the water inlet valve (5) is connected with a rubber hose.
9. A statistical method for testing a foreign matter test bench of a water pump according to any one of claims 1 to 8, comprising:
step S1, selecting one of n different types of foreign matters, putting the selected foreign matter into a foreign matter inlet pipe (2) of a foreign matter discharging test board of a water pump, opening a water inlet valve (5), switching on a power supply to enable the water pump (7) to be tested to normally operate, observing whether the foreign matters are discharged into a foreign matter discharging screen (3) from the water pump (7) to be tested or not, and calculating the single foreign matter discharge capacity P of the single foreign matteriThe score of (3) is obtained, each foreign matter is tested for 10 times, and the average score of the 10 tests is taken to obtain the single foreign matter discharge capacity index of the water pump (7) to be tested for one foreign matter
The single foreign matter discharge ability index
Expressed by the formula:
wherein i represents the test times of each foreign matter, and i is 10, which means that each foreign matter is tested for 10 times;
step S2, after testing n different kinds of foreign bodies, testing the single foreign body discharge ability index of n kinds of foreign bodies
Then the average value is taken to obtain the comprehensive rejection capacity index of the water pump (7) to be measured
The comprehensive rejection capacity index
Expressed by the formula:
where i ═ n means that n foreign substances were tested in total.
10. The statistical method for testing a pump foreign matter discharge test bench according to claim 9, wherein the single foreign matter discharge capacity P in step S1 is a single foreign matter discharge capacityiThe calculating method comprises the following steps:
step S11, if the foreign matter is discharged from the water pump (7) to be tested within 10 seconds, discharging the foreign matterDischarging from the screen (3) to obtain 10 min, i.e. Pi＝10；
Step S12, if the foreign matter can not be discharged from the water pump (7) to be measured within 10 seconds, the air inlet valve (61) is opened to ventilate the air inlet pipe (13) for 3 seconds, then the time is counted, if the foreign matter is discharged into the foreign matter discharge screen (3) within 10 seconds, 9 minutes is obtained, namely Pi＝10-1；
Step S13, if the foreign matter is not discharged after the step S12, the power supply of the water pump (7) to be measured is cut off, the water pump (7) to be measured is started again after waiting for 3 seconds and powered on for 10 seconds, and if the foreign matter can be discharged, the power is divided into 8 minutes, namely Pi＝10-1-1；
Step S14, the operation process of the steps S12-S13 is repeated for 5 times at most, and if the water pump (7) to be tested is blocked and does not drain water during the repeated period, the score is 0, namely Pi＝0。
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| CN116696754A (en) * | 2023-08-01 | 2023-09-05 | 福建省福安市明星电机有限公司 | Test bench for water pump production and use method thereof |
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| CN209838667U (en) * | 2019-04-29 | 2019-12-24 | 武汉大学 | Water pump basic performance and cavitation performance comprehensive test bed under sand-containing water condition |
| CN110131181A (en) * | 2019-05-29 | 2019-08-16 | 江苏大学 | A kind of test centrifugal pump conveys the experimental provision of flexible long grain obstruction and abrasion |
| CN111120349A (en) * | 2019-12-28 | 2020-05-08 | 常州工学院 | Testing device and method suitable for testing anti-blocking performance of sewage pump |
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