A circulating pump testing method

Abstract

The present invention discloses a circulating pump testing method, characterized by comprising: a switchable water channel device, a test bench, and a main water tank; S1, measuring the water flow rate of the circulating pump at full load under the water channel length of each test water channel; S2, performing T times of start-stop endurance testing; S3, measuring the water flow rate of the circulating pump at full load under the water channel length of each test water channel; S4, calculating the attenuation rate of the circulating pump after the endurance test; S5, judging whether the calculated attenuation rate FN under each water channel length working condition is qualified. The present invention integrates suction tests under different water channel length simulation conditions into a circulating pump testing system without changing the installation position of the circulating pump; and can simultaneously perform durability performance tests on multiple circulating pumps, significantly reducing the layout space of the test platform. It can quickly calculate whether the attenuation rate of the suction performance of the circulating pump under different water channel length simulation working conditions before and after the endurance test is qualified, effectively improving the testing efficiency of the circulating pump.

Description

Technical Field

[0001] The present invention relates to the technical field of circulating pump detection, and in particular to a circulating pump testing method. Background Art

[0002] The durability and suction performance of a circulating pump are important evaluation indicators for circulating pumps. Suction performance is generally reflected in the suction of the circulating pump under different path lengths; durability performance is generally the degree of attenuation of the suction before and after a large number of start-stop durability tests. The usage scenarios of water heaters are generally small rooms, ordinary rooms, multi-story duplexes or large flats, and the lengths of the water supply paths of their water heaters are different. The circulating pump is a key component for the stable operation of the water heater. In order to ensure that the water heater can maintain good durability and suction performance in different usage scenarios, each batch of circulating pumps needs to be sampled and tested. In order to facilitate the rapid detection of the suction of the circulating pump in different usage environments and the suction before and after the durability test, it is necessary to propose a circulating pump testing method to reduce the layout space of the test platform and improve the test efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a circulating pump testing method.

[0004] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: a circulating pump testing method, characterized by comprising: a switchable water channel device, a test bench and a main water tank;

[0005] The switchable waterway device includes a water inlet interface, a water outlet interface, a plurality of control valves and a test waterway arranged in a serpentine coil structure; by changing the on / off of the control valve, the length of the test waterway can be changed;

[0006] The test bench includes a suction test station, a durability test station, and a control center; the suction test station, the switchable water channel device, and the main water tank are connected by pipelines; the durability test station is connected to the main water tank by pipelines; a circulating pump can be installed at the suction test station or the durability test station and is electrically connected to the control center;

[0007] The test method includes the following steps:

[0008] S1, place the circulating pump at the suction test station, and measure the water flow rate of the circulating pump at full load (U1 to U2) under the water channel length of each test water channel. N ; Where N is the number of switchable lengths of the waterway;

[0009] S2, placing the circulating pump at the endurance test station and performing a start-stop endurance test T times;

[0010] S3, after the endurance test, the circulating pump is placed in the suction test station again, and the water flow rate of the circulating pump at full load K1 to K2 is measured at the water path length of each test water path. N ;

[0011] S4, calculate the full load water flow K of the circulating pump after the durability test under various water channel length conditions N Before the endurance test, the circulating pump has a full load flow rate of U N The ratio of the circulating pump after the durability test is obtained. N , the F N =1-K N / U N ;

[0012] S5, determine and calculate the attenuation rate F under various waterway length conditions N Whether qualified.

[0013] Optionally, the switchable water channel device includes a base frame, and a first test water channel, a second test water channel, a third test water channel and an output pipe provided on the base frame;

[0014] The first test water channel, the second test water channel, the third test water channel and the output pipe are connected in sequence; the first test water channel is provided with a water inlet interface, and the output pipe is provided with a water outlet interface; the first test water channel, the second test water channel and the third test water channel are arranged in a serpentine coil structure;

[0015] A first bypass pipe and a first control valve are provided between the end of the first test water circuit and the output pipe; a second bypass pipe and a second control valve are provided between the second test water circuit and the output pipe; and a third control valve is provided between the end of the third test water circuit and the output pipe.

[0016] Optionally, the first test water channel, the second test water channel and the third test water channel are composed of a plurality of vertical water pipes and horizontal water pipes arranged side by side; the horizontal water pipes are connected to the vertical water pipes via arc-shaped bends.

[0017] Optionally, the arc-shaped bend pipe is provided with a first arc-shaped bend pipe and a second arc-shaped bend pipe having different radii.

[0018] Optionally, two adjacent vertical water pipes are arranged in a periodic manner according to a first interval and a second interval; the upper parts of several vertical water pipes are connected to the horizontal water pipe through a first arc-shaped bend pipe, and the lower parts are connected to the horizontal water pipe through a second arc-shaped bend pipe.

[0019] Optionally, the base frame includes a vertical frame; the first test water channel and the second test water channel are arranged on one side of the vertical frame, and the third test water channel is arranged on the other side of the vertical frame.

[0020] Optionally, the water channel lengths of the first test water channel and the second test water channel are both 15 meters; the water channel length of the third test water channel is 30 meters.

[0021] Optionally, a cache auxiliary water tank is provided between the durability test station and the main water tank; and a cache control valve is provided between the cache auxiliary water tank and the main water tank.

[0022] Optionally, a plurality of the durability test stations are provided, and the plurality of the durability test stations are connected to the cache auxiliary water tank via a pipeline.

[0023] Optionally, the control center is provided with control buttons and a display screen.

[0024] Beneficial effects of the present invention: The switchable water channel device is provided with a test water channel arranged in a serpentine winding coil structure. By changing the on-off of the control valve, the water channel length of the test water channel can be changed. Without changing the installation position of the circulating pump, a variety of water channel length simulation working conditions can be quickly carried out, thereby measuring the suction performance under different water channel length simulation working conditions at the suction test station; and the durability test station of the test bench can also simultaneously perform start-stop durability tests on other circulating pumps. The present invention integrates suction tests under different water channel length simulation conditions on a test system of a circulating pump, without changing the installation position of the circulating pump; and the durability performance tests of multiple circulating pumps can be carried out simultaneously, greatly reducing the layout space of the test platform, and can quickly calculate whether the attenuation rate of the suction performance of the circulating pump before and after the durability test under different water channel length simulation working conditions is qualified, thereby effectively improving the testing efficiency of the circulating pump.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0027] Figure 1 A schematic structural diagram of a circulating pump test system according to the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure of the switchable waterway device;

[0029] Figure 3 for Figure 1 A top view of the switchable waterway device;

[0030] Figure 4 for Figure 1 The main view of the switchable waterway device.

[0031] Description of main component symbols:

[0032] 100, switchable waterway device; 10, base frame; 11, vertical frame; 20, first test waterway; 21, water inlet interface; 22, first bypass pipe; 23, first control valve; 30, second test waterway; 31, second bypass pipe; 32, second control valve; 40, third test waterway; 41, third control valve; 50, output pipe; 51, water outlet interface; 60, vertical water pipe; 61, horizontal water pipe; 62, first curved elbow; 63, second curved elbow; 64, first compartment; 65, second compartment;

[0033] 200. Test bench; 210. Suction test station; 220. Durability test station; 230. Control center; 300. Main water tank; 400. Cache auxiliary water tank; 410. Cache control valve. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of this invention, "above," "below," and "within" are understood to be exclusive of the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; and internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in the present invention based on the specific content of the technical solution.

[0038] Example

[0039] Reference Figures 1 to 4 The present invention provides a circulating pump testing method, which is characterized by comprising: a switchable water channel device 100, a test bench 200 and a main water tank 300;

[0040] The switchable waterway device 100 includes a water inlet interface 21, a water outlet interface 51, a plurality of control valves, and a test waterway arranged in a serpentine coil structure; by changing the on / off of the control valves, the length of the test waterway can be changed;

[0041] The test bench 200 includes a suction test station 210, a durability test station 220, and a control center 230. The suction test station 210, the switchable water channel device, and the main water tank 300 are connected by pipelines. The durability test station 220 is connected to the main water tank 300 via pipelines. A circulating pump can be installed in the suction test station 210 or the durability test station 220 and is electrically connected to the control center 230.

[0042] The test method includes the following steps:

[0043] S1, place the circulating pump at the suction test station 210, and measure the water flow rate U1 to U2 of the circulating pump at full load under the water channel length of each test water channel. N ; Where N is the number of switchable lengths of the waterway;

[0044] S2, placing the circulating pump at the durability test station 220 and performing a start-stop durability test T times;

[0045] S3, after the endurance test, the circulating pump is placed in the suction test station again, and the water flow rate of the circulating pump at full load K1 to K2 is measured at the water path length of each test water path. N ;

[0046] S4, calculate the full load water flow K of the circulating pump after the durability test under various water channel length conditions N Before the endurance test, the circulating pump has a full load flow rate of U N The ratio of the circulating pump after the durability test is obtained. N , the F N =1-K N / U N ;

[0047] S5, determine and calculate the attenuation rate F under various waterway length conditions N Whether qualified.

[0048] In the present invention, the switchable water channel device 100 is provided with a test water channel arranged in a serpentine coil structure. By changing the on / off position of the control valve, the water channel length of the test water channel can be changed. Without changing the installation position of the circulating pump, multiple water channel length simulation conditions can be quickly performed, thereby measuring the suction performance under different water channel length simulation conditions at the suction test station 210. In addition, the durability test station 220 of the test bench 200 can also simultaneously perform start-stop durability tests on other circulating pumps. The present invention integrates suction tests under different water channel length simulation conditions into a circulating pump test system without changing the installation position of the circulating pump. In addition, the durability performance tests of multiple circulating pumps can be performed simultaneously, significantly reducing the layout space of the test platform. The attenuation rate of the suction performance of the circulating pump under different water channel length simulation conditions before and after the durability test can be quickly calculated to determine whether it is qualified, effectively improving the testing efficiency of the circulating pump.

[0049] In this embodiment, the switchable water channel device 100 includes a base frame 10 , and a first test water channel 20 , a second test water channel 30 , a third test water channel 40 and an output pipe 50 disposed on the base frame 10 ;

[0050] The first test water channel 20, the second test water channel 30, the third test water channel 40 and the output pipe 50 are sequentially connected; the first test water channel 20 is provided with a water inlet interface 21, and the output pipe 50 is provided with a water outlet interface 51; the first test water channel 20, the second test water channel 30 and the third test water channel 40 are arranged in a serpentine coil structure;

[0051] A first bypass pipe 22 and a first control valve 23 are provided between the end of the first test water channel 20 and the output pipe 50; a second bypass pipe 31 and a second control valve 32 are provided between the second test water channel 30 and the output pipe 50; and a third control valve 41 is provided between the end of the third test water channel 40 and the output pipe 50.

[0052] The circuitous serpentine coil arrangement of the first test water channel 20, the second test water channel 30, and the third test water channel 40 can simulate the actual circuitous piping conditions of the water heater connecting pipes; and by controlling the conduction state of the test water channel and the output pipe 50 through the first control valve 23, the second control valve 32 or the third control valve 41, the actual water channel length of the test water channel can be changed; multiple test states such as the state in which only the first test water channel 20 is conductive, or the state in which the first test water channel 20 and the second test water channel 30 are conductive, or the state in which all three test water channels are connected in sequence can be achieved. There is no need to change the installation position of the circulating pump. Only the conduction state of the control valve is switched on the water channel test stand, and the suction test under various water channel length simulation conditions can be quickly performed, which greatly reduces the layout space of the test platform and effectively improves the test efficiency.

[0053] In this embodiment, the first test water channel 20, the second test water channel 30, and the third test water channel 40 are composed of a plurality of vertical water pipes 60 and horizontal water pipes 61 arranged side by side. The horizontal water pipes 61 are connected to the vertical water pipes 60 via curved elbows. By using the vertical water pipes 60, the horizontal water pipes 61, and the curved elbows, a serpentine, coiled structure of water testing water channels can be implemented on the base frame 10. Furthermore, the vertical water pipes 60 can be arranged with uniform standard lengths, such as 1 or 2 meters, for ease of installation.

[0054] In this embodiment, the curved pipes are provided with a first curved pipe 62 and a second curved pipe 63 of different radii. The different diameters of the first curved pipe 62 and the second curved pipe 63 can simulate the large and small corner waterway conditions in actual waterway laying, which is closer to the use scenario of the water heater circulation pump.

[0055] Specifically, adjacent vertical water pipes 60 are periodically arranged at intervals of first and second intervals 64 and 65, respectively. Several vertical water pipes 60 are connected to the transverse water pipe 61 at their upper portions via first curved bends 62, and to the transverse water pipe 61 at their lower portions via second curved bends 63. This arrangement, by periodically arranging the vertical water pipes 60 at intervals of first and second intervals 64 and 65, allows the water measurement layout of a serpentine coil structure to be completed using vertical water pipes 60, transverse water pipes 61, and first and second curved bends 62 and 63 of the same specifications. This arrangement also simulates the large and small corner waterway conditions encountered in actual waterway installation.

[0056] In this embodiment, the base frame 10 includes a vertical frame 11; a first test water channel 20 and a second test water channel 30 are disposed on one side of the vertical frame 11, and a third test water channel 40 is disposed on the other side of the vertical frame 11. By arranging the test water channels on both sides of the vertical frame 11, the span of the vertical frame 11 is further reduced.

[0057] Furthermore, a plurality of vertical frames 11 may be arranged at intervals to further reduce the span of the base frame 10 .

[0058] In some embodiments, the first test water channel 20 and the second test water channel 30 have the same length, which is half the length of the third test water channel 40. With this arrangement, the combined length of the first and second test water channels 20 and 30 is the same as that of the third test water channel, allowing them to be arranged on opposite sides of the vertical frame 11 with similar transverse spans, fully utilizing the space on both sides of the vertical frame 11 for the placement of the test water channels.

[0059] For example, the length of the third water measuring waterway is between 20 meters and 40 meters; and the length of the first water measuring waterway and the second water measuring waterway is between 10 meters and 20 meters.

[0060] After multiple tests, it is preferred that the lengths of the first and second test water channels 20, 30 are both 15 meters; the length of the third test water channel 40 is 30 meters. This can effectively simulate the operating conditions of small and ordinary rooms, multi-story duplexes, and large apartments, and can be easily arranged using vertical water pipes 60, horizontal water pipes 61, first curved elbows 62, and second curved elbows 63 of the same specifications. The first bypass pipe 22 and second bypass pipe 31 are centrally located within the vertical water pipe 60.

[0061] The specific switching conditions of the test waterway are as follows:

[0062] 1. Simulate the test conditions of a small room. Close the second control valve 32 and the third control valve 41, and open the first control valve 23. At this time, the test water flows along the first test water channel 20 and the first bypass pipe 22 toward the output pipe 50. The test water channel is 15 meters long.

[0063] 2. Simulate the test conditions of an ordinary room. Close the first control valve 23 and the third control valve 41, and open the second control valve 32. At this time, the test water flows along the first test water channel 20, the second test water channel 30, and the second bypass pipe 31 toward the output pipe 50. The test water channel condition is 30 meters long.

[0064] 3. To simulate the test conditions of a multi-story duplex or large flat, close the first control valve 23 and the second control valve 32, and open the third control valve 41. At this time, the test water flows along the first test water channel 20, the second test water channel 30, and the third test water channel 40 toward the output pipe 50, which is a test water channel condition with a water channel length of 60 meters.

[0065] In the above arrangement, the number N of switchable lengths of the waterway is 3;

[0066] In this method, the decay rate F N The qualified index can be adjusted according to the positioning of the product, such as 90%, 88%, 85% or 80%.

[0067] It can also be adjusted according to the length of different waterways. For example, for a test waterway with a length of 15 meters, F N The qualified rate index is 90%; in the test waterway condition with a length of 30 meters, F N The qualified rate index is 85%; in the test waterway condition with a length of 60 meters, F N The pass rate index is 80%.

[0068] In this embodiment, a buffer sub-tank 400 is further provided between the endurance test station 220 and the main water tank 300; a buffer control valve 410 is provided between the buffer sub-tank 400 and the main water tank 300. The buffer sub-tank 400 can store a certain amount of water and is directly connected to the milk wine test station. When the circulation pump in the endurance test station 220 is repeatedly started to pump water, a chaotic water flow is formed. The end of this water flow is transferred to the buffer sub-tank 400 and terminates, and is not directly transferred to the main water tank 300. The main water tank 300 can maintain a relatively stable water level, ensuring the stability of the water flow of the switchable water channel device 100 and the stability of the test water pressure of the suction test station 210.

[0069] In this embodiment, to improve the efficiency of the endurance test, several endurance test stations 220 are provided, each connected to the buffer auxiliary water tank 400 via a pipeline. This allows for simultaneous endurance testing of multiple circulating pump samples. The endurance test process typically involves a large number of start-stop endurance tests, with pumping for a certain period and shutting down for a certain period. For example, a 100,000-cycle test process with a pumping period of 3 seconds and a shut-down period of 5 seconds can be employed.

[0070] In order to facilitate intuitive feedback of test status and data, as well as adjustment of test parameters, the control center 230 is provided with control buttons and a display screen.

[0071] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A circulating pump testing method, characterized in that: include: A switchable water channel device (100), a test bench (200) and a main water tank (300); The switchable waterway device (100) comprises a water inlet interface (21), a water outlet interface (51), a plurality of control valves, and a test waterway arranged in a serpentine coil structure; by changing the on / off state of the control valves, the length of the test waterway can be changed; The test bench (200) comprises a suction test station (210), a durability test station (220) and a control center (230); the suction test station (210), the switchable water channel device (100) and the main water tank (300) are connected via a pipeline; the durability test station (220) is connected to the main water tank (300) via a pipeline; a circulating pump can be installed at the suction test station (210) or the durability test station (220) and is electrically connected to the control center (230); The test method includes the following steps: S1, placing the circulating pump at the suction test station (210), measuring the water flow rate U1 to U2 of the circulating pump at full load under the water channel length of each test water channel. N ; Where N is the number of switchable lengths of the waterway; S2, placing the circulating pump at a durability test station (220) and performing a start-stop durability test T times; S3, after the endurance test, the circulating pump is placed in the suction test station again, and the water flow rate of the circulating pump at full load K1 to K2 is measured at the water path length of each test water path. N ; S4, calculate the full load water flow K of the circulating pump after the durability test under various water channel length conditions N Before the endurance test, the circulating pump has a full load flow rate of U N The ratio of the circulating pump after the durability test is obtained. N , the F N =1-K N / U N ; S5, determine and calculate the attenuation rate F under various waterway length conditions N Whether qualified.

2. The circulating pump testing method according to claim 1, wherein: The switchable water channel device (100) comprises a base frame (10), and a first test water channel (20), a second test water channel (30), a third test water channel (40), and an output pipe (50) arranged on the base frame (10); The first test water channel (20), the second test water channel (30), the third test water channel (40) and the output pipe (50) are sequentially connected; the first test water channel (20) is provided with a water inlet interface (21), and the output pipe (50) is provided with a water outlet interface (51); the first test water channel (20), the second test water channel (30) and the third test water channel (40) are arranged in a serpentine winding coil structure; A first bypass pipe (22) and a first control valve (23) are provided between the end of the first test water circuit (20) and the output pipe (50); a second bypass pipe (31) and a second control valve (32) are provided between the second test water circuit (30) and the output pipe (50); and a third control valve (41) is provided between the end of the third test water circuit (40) and the output pipe (50).

3. The circulating pump testing method according to claim 2, wherein: The first test water channel (20), the second test water channel (30) and the third test water channel (40) are composed of a plurality of vertical water pipes (60) and horizontal water pipes (61) arranged side by side; the horizontal water pipes (61) are connected to the vertical water pipes (60) through arc-shaped elbows.

4. The circulating pump testing method according to claim 3, wherein: The arc-shaped bend pipe is provided with a first arc-shaped bend pipe (62) and a second arc-shaped bend pipe (63) having different radii.

5. The circulating pump testing method according to claim 4, characterized in that: Two adjacent vertical water pipes (60) are periodically arranged at intervals of a first interval (64) and a second interval (65); the upper portions of a plurality of the vertical water pipes (60) are connected to the horizontal water pipe (61) via a first arc-shaped bend pipe (62), and the lower portions are connected to the horizontal water pipe (61) via a second arc-shaped bend pipe (63).

6. The circulating pump testing method according to claim 3, wherein: The base frame (10) comprises a vertical frame (11); the first test water channel (20) and the second test water channel (30) are arranged on one side of the vertical frame (11), and the third test water channel (40) is arranged on the other side of the vertical frame (11).

7. The circulating pump testing method according to claim 2, wherein: The water channel lengths of the first test water channel (20) and the second test water channel (30) are both 15 meters; and the water channel length of the third test water channel (40) is 30 meters.

8. The circulating pump testing method according to claim 1, wherein: A buffer auxiliary water tank (400) is further provided between the endurance test station (220) and the main water tank (300); and a buffer control valve (410) is provided between the buffer auxiliary water tank (400) and the main water tank (300).

9. The circulating pump testing method according to claim 8, characterized in that: A plurality of the endurance test stations (220) are provided, and the plurality of the endurance test stations (220) are all connected to the buffer auxiliary water tank (400) via pipelines.

10. The circulating pump testing method according to claim 1, wherein: The control center (230) is provided with control buttons and a display screen.

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