Circulating pump testing system

Abstract

The utility model discloses a circulating pump test system, which comprises a switchable waterway device, a test board and a main water tank, the switchable waterway device comprises a water inlet interface, a water outlet interface, a plurality of control valves and a test waterway arranged in a snakelike circuitous coil structure; the waterway length of the test waterway can be changed by changing the on-off of the control valve; the draft test station, the switchable waterway device and the main water tank are connected through a pipeline; the durability test station is connected with the main water tank through a pipeline; the circulating pump can be installed at the pumping force test station or the durability test station and is electrically connected with the control center. According to the utility model, the pumping force test under simulation disclosure of different waterway lengths is integrated on the test system of the circulating pump, and the installation station of the circulating pump does not need to be changed; moreover, durability testing of a plurality of circulating pumps can be carried out synchronously, the arrangement space of a testing platform is greatly reduced, and the testing efficiency of the circulating pumps is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating pump detection, and particularly relates to a circulating pump testing system. Background Art

[0002] The durability performance and pumping performance of a circulating pump are important evaluation indexes of the circulating pump. The pumping performance generally reflects the pumping force of the circulating pump for different path lengths; the durability performance generally refers to the attenuation degree of the pumping force 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, etc., and the lengths of the water supply paths of the 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 better durability performance and pumping 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 pumping force of the circulating pump in different usage environments and the pumping force before and after the durability test, a circulating pump testing system needs to be proposed to reduce the layout space of the test platform and improve the test efficiency. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model proposes a circulating pump testing system.

[0004] An embodiment of the utility model adopts the following technical solution to solve its technical problems: a circulating pump testing system, comprising: a switchable water circuit device, a test bench and a main water tank;

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

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

[0007] Optionally, the switchable water circuit device includes a base frame, and a first test water circuit, a second test water circuit, a third test water circuit and an output pipe arranged on the base frame;

[0008] The first test water circuit, the second test water circuit, the third test water circuit and the output pipe are connected in sequence; the first test water circuit is provided with an inlet interface, and the output pipe is provided with an outlet interface; the first test water circuit, the second test water circuit and the third test water circuit are arranged in a serpentine coil structure;

[0009] A first bypass pipe and a first control valve are arranged between the end of the first test waterway and the output pipe; a second bypass pipe and a second control valve are arranged between the second test waterway and the output pipe; a third control valve is arranged between the end of the third test waterway and the output pipe.

[0010] Optionally, the first test waterway, the second test waterway and the third test waterway are composed of a plurality of vertically arranged water pipes and horizontally arranged water pipes connected in parallel; the horizontal water pipes and the vertical water pipes are connected by arc-shaped elbows.

[0011] Optionally, the arc-shaped elbows are provided with a first arc-shaped elbow and a second arc-shaped elbow with different radii.

[0012] Optionally, two adjacent vertical water pipes are arranged in a periodic arrangement with two interval distances of a first interval and a second interval; the upper parts of a plurality of the vertical water pipes are all connected to the horizontal water pipe through the first arc-shaped elbow, and the lower parts are all connected to the horizontal water pipe through the second arc-shaped elbow.

[0013] Optionally, the base frame includes a vertical frame; the first test waterway and the second test waterway are arranged on one side of the vertical frame, and the third test waterway is arranged on the other side of the vertical frame.

[0014] Optionally, the waterway lengths of the first test waterway and the second test waterway are both 15 meters; the waterway length of the third test waterway is 30 meters.

[0015] Optionally, a buffer secondary water tank is further arranged between the durability test station and the main water tank; a buffer control valve is arranged between the buffer secondary water tank and the main water tank.

[0016] Optionally, a plurality of durability test stations are provided, and a plurality of the durability test stations are all connected to the buffer secondary water tank through pipelines.

[0017] Optionally, the control center is provided with control buttons and a display screen.

[0018] The beneficial effects of the present utility model: The switchable waterway device is provided with a test waterway arranged in a serpentine meandering coil structure. By changing the on-off of the control valve, the waterway length of the test waterway can be changed. Without changing the installation position of the circulation pump, various waterway length simulation conditions can be quickly carried out, so as to measure the pumping performance under different waterway length simulation conditions at the pumping force test station; moreover, the durability test station of the test bench can also simultaneously perform the start-stop durability test of other circulation pumps. The present utility model integrates the pumping force test under different waterway length simulations on a test system of a single circulation pump without changing the installation position of the circulation pump; and the durability performance tests of multiple circulation pumps can be carried out synchronously, greatly reducing the layout space of the test platform and effectively improving the test efficiency of the circulation pump.

[0019] In order to make the above - mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0020] The above - mentioned and / or additional aspects and advantages of the present utility model will become obvious and easily understandable from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a schematic structural diagram of the circulating pump test system of the present utility model;

[0022] Figure 2 is Figure 1 a schematic structural diagram of the switchable waterway device in

[0023] Figure 3 is Figure 1 a top - view diagram of the switchable waterway device in

[0024] Figure 4 is Figure 1 a front - view diagram of the switchable waterway device in

[0025] Description of the Main Component Symbols:

[0026] 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 arc - shaped elbow; 63, second arc - shaped elbow; 64, first interval; 65, second interval;

[0027] 200, test bench; 210, suction force test station; 220, durability test station; 230, control center; 300, main water tank; 400, buffer secondary water tank; 410, buffer control valve. Detailed Embodiment

[0028] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0029] In the description of the present utility model, the meaning of "a plurality of" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the present number, while understandings such as "above", "below", and "within" include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present utility model, it should be understood that when it comes to orientation descriptions, such as the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc., they are based on the orientations or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model.

[0031] In the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense. For example, it can be directly connected, or indirectly connected through an intermediate medium; it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected; it can be the communication inside two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0032] Embodiment

[0033] Refer to Figures 1 to 4 , a circulating pump test system proposed by the present utility model includes: a switchable water circuit device 100, a test bench 200, and a main water tank 300;

[0034] The switchable water circuit device 100 includes a water inlet interface 21, a water outlet interface 51, several control valves, and a test water circuit arranged in a serpentine coil structure; by changing the on-off of the control valves, the water circuit length of the test water circuit can be changed;

[0035] The test bench 200 includes a suction force test station 210, a durability test station 220, and a control center 230; the suction force test station 210, the switchable water circuit device, and the main water tank 300 are connected by pipelines; the durability test station 220 is connected to the main water tank 300 by a pipeline; the circulating pump can be installed at the suction force test station 210 or the durability test station 220 and is electrically connected to the control center 230.

[0036] In the present invention, the switchable water channel device 100 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 conditions can be quickly performed, thereby measuring the suction performance under different water channel length simulation conditions at the suction test station 210; and the durability test station 220 of the test bench 200 can also perform start-stop durability tests on other circulating pumps at the same time. The present invention integrates suction tests under different water channel length simulation conditions on a circulating pump test system, without changing the installation position of the circulating pump; and the durability performance tests of multiple circulating pumps can be performed simultaneously, which greatly reduces the layout space of the test platform and effectively improves the testing efficiency of the circulating pump.

[0037] 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;

[0038] The first test water channel 20, the second test water channel 30, the third test water channel 40 and the output pipe 50 are connected in sequence; 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;

[0039] 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 ; a third control valve 41 is provided between the end of the third test water circuit 40 and the output pipe 50 .

[0040] The circuitous serpentine coil arrangement of the first test water circuit 20, the second test water circuit 30, and the third test water circuit 40 can simulate the actual circuitous piping conditions of the water heater connecting pipes; and by controlling the conduction state of the test water circuit and the output pipe 50 through the first control valve 23, the second control valve 32 or the third control valve 41, the water circuit length of the actual water circuit of the test water circuit can be changed; multiple test states such as the state in which only the first test water circuit 20 is conductive, or the state in which the first test water circuit 20 and the second test water circuit 30 are conductive, or the state in which the three test water circuits are connected in sequence can be achieved. There is no need to change the installation position of the circulating pump. Only by switching the conduction state of the control valve on the water circuit test frame, the suction test under various water circuit length simulation conditions can be quickly performed, which greatly reduces the layout space of the test platform and effectively improves the test efficiency.

[0041] In this embodiment, the first test waterway 20, the second test waterway 30, and the third test waterway 40 are composed of a plurality of vertically arranged water pipes 60 and horizontally arranged water pipes 61 arranged side by side; the horizontal water pipes 61 are connected to the vertical water pipes 60 through arc-shaped elbows. By means of the vertical water pipes 60, the horizontal water pipes 61, and the arc-shaped elbows, a water testing waterway layout with a serpentine and circuitous coil structure can be realized on the base frame 10; and the vertical water pipes 60 can be arranged with water pipes of the same standard length, such as water pipes with a length of 1 meter or 2 meters, which is convenient for setting.

[0042] In this embodiment, the arc-shaped elbows are provided with a first arc-shaped elbow 62 and a second arc-shaped elbow 63 with different radii. The first arc-shaped elbow 62 and the second arc-shaped elbow 63 with different pipe diameters can simulate the waterway conditions of large corners and small corners in actual waterway laying, and are closer to the usage scenario of the water heater circulation pump.

[0043] Specifically, two adjacent vertical water pipes 60 are arranged in a periodic arrangement at two interval distances, namely a first interval 64 and a second interval 65; the upper parts of a plurality of vertical water pipes 60 are all connected to the horizontal water pipe 61 through the first arc-shaped elbow 62, and the lower parts are all connected to the horizontal water pipe 61 through the second arc-shaped elbow 63. In this arrangement method, by arranging the vertical water pipes 60 at intervals through the periodic intervals of the first interval 64 and the second interval 65, the water testing waterway layout of the serpentine and circuitous coil structure can be completed by using the same specification vertical water pipes 60, horizontal water pipes 61, first arc-shaped elbows 62, and second arc-shaped elbows 63, and the waterway conditions of large corners and small corners in actual waterway laying can be simulated.

[0044] In this embodiment, the base frame 10 includes a vertical frame 11; the first test waterway 20 and the second test waterway 30 are arranged on one side of the vertical frame 11, and the third test waterway 40 is arranged on the other side of the vertical frame 11. By arranging the test waterways on both sides of the vertical frame 11, the span space of the vertical frame 11 is further reduced in space.

[0045] Furthermore, a plurality of vertical frames 11 can be arranged at intervals to further reduce the span space of the base frame 10.

[0046] In some embodiments, the waterway lengths of the first test waterway 20 and the second test waterway 30 are the same and are half of the waterway length of the third test waterway 40. In this arrangement method, the total length of the first test waterway 20 and the second test waterway 30 is the same as that of the third test waterway, and the relative sides of the vertical frame 11 can be arranged with a similar horizontal span, making full use of the space on both sides of the vertical frame 11 for the layout of the test waterways.

[0047] For example, the waterway length of the third test waterway is in the range of 20 meters to 40 meters; then the waterway lengths of the first test waterway and the second test waterway are in the range of 10 meters to 20 meters.

[0048] After multiple experimental tests, preferably, the waterway lengths of the first test waterway 20 and the second test waterway 30 are both 15 meters; the waterway length of the third test waterway 40 is 30 meters. It can better simulate the use conditions of scenarios such as small apartments, ordinary apartments, multi-story duplexes or large flats, and can be conveniently arranged through the vertical water pipes 60, horizontal water pipes 61, first arc-shaped elbows 62 and second arc-shaped elbows 63 of the same specification; among them, the first bypass pipe 22 and the second bypass pipe 31 are centrally arranged in the vertical water pipe 60.

[0049] The test method using this circulating pump test system includes the following steps:

[0050] S1, Place the circulating pump at the suction force test station 210, and measure the water flow velocity U of the circulating pump at full load under the waterway lengths of each test waterway 1 to U N ; where N is the number of switchable lengths of the waterway length;

[0051] S2, Place the circulating pump at the durability test station 220, and conduct the start-stop durability test for T times;

[0052] S3, Place the circulating pump after the durability test at the suction force test station again, and measure the water flow velocity K of the circulating pump at full load under the waterway lengths of each test waterway 1 to K N ;

[0053] S4, Calculate the ratio of the full-load water flow K of the circulating pump after the durability test to the full-load water flow U of the circulating pump before the durability test under each waterway length condition, and obtain the attenuation rate F of the circulating pump after the durability test N and the full-load water flow U of the circulating pump before the durability test N to obtain the attenuation rate F of the circulating pump after the durability test N (F N = 1 - K N / U N );

[0054] S5, Judge whether the attenuation rate F N is qualified under each waterway length condition.

[0055] The specific switching conditions of the test waterway are as follows:

[0056] 1. Simulate the test condition of a small apartment. Close the second control valve 32 and the third control valve 41, and open the first control valve 23. At this time, the test waterway flows along the first test waterway 20 and the first bypass pipe 22 towards the output pipe 50, which is the test waterway condition with a waterway length of 15 meters.

[0057] 2. Simulate the test conditions of an ordinary living 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 path flows along the first test water path 20, the second test water path 30, and the second bypass pipe 31 towards the output pipe 50, which is the test water path condition with a water path length of 30 meters.

[0058] 3. Simulate the test conditions of a multi-story duplex or a large flat floor. 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 path flows along the first test water path 20, the second test water path 30, and the third test water path 40 towards the output pipe 50, which is the test water path condition with a water path length of 60 meters.

[0059] In the above arrangement, the number N of switchable lengths of the water path length is 3;

[0060] In this method, the qualified index of the attenuation rate F N can be adjusted according to the positioning of the product, such as 90%, 88%, 85% or 80%, etc.

[0061] It can also be adjusted according to the length conditions of different water paths. For example, in the test water path condition with a water path length of 15 meters, the qualified rate index of F N is 90%; in the test water path condition with a water path length of 30 meters, the qualified rate index of F N is 85%; in the test water path condition with a water path length of 60 meters, the qualified rate index of F N is 80%.

[0062] In this embodiment, a buffer secondary water tank 400 is further provided between the durability test station 220 and the main water tank 300; a buffer control valve 410 is provided between the buffer secondary water tank 400 and the main water tank 300. The buffer secondary water tank 400 can store a certain amount of water and is directly connected to the milk wine test station. During the process of the circulation pump at the durability test station 220 repeatedly starting to pump and suck water, a chaotic water flow will be formed. The end of this water flow is terminated when it reaches the buffer secondary water tank 400 and will not be directly transmitted to the main water tank 300. The main water tank 300 can maintain a relatively stable water level state, ensuring the stability of the water flow of the switchable water path device 100 and ensuring the stability of the test water pressure at the suction force test station 210.

[0063] In this embodiment, in order to improve the efficiency of the durability test, several durability test stations 220 are provided. Several durability test stations 220 are all connected to the buffer secondary water tank 400 through pipelines. The durability tests of multiple circulation pump samples can be carried out simultaneously. During the durability test process, it is generally a large number of start-stop durability tests with pumping for a certain time and shutting down for a certain time. For example, a cyclic test process of pumping for 3 seconds and stopping for 5 seconds for 100,000 times.

[0064] To facilitate the intuitive feedback of the test status and data, as well as the adjustment of test parameters, the control center 230 is provided with control buttons and a display screen.

[0065] Of course, the present utility model is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations and substitutions are all included within the scope defined by the claims of this application.

Claims

1. A circulating pump testing system, characterized in that: include: A switchable water channel device (100), a test bench (200) and a main water tank (300); The switchable water channel device (100) comprises a water inlet interface (21), a water outlet interface (51), a plurality of control valves and a test water channel arranged in a serpentine coil structure; the water channel length of the test water channel can be changed by changing the on / off of the control valve; 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 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).

2. The circulating pump testing system according to claim 1, characterized in that: 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 connected in sequence; 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 system according to claim 2, characterized in that: 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 transverse water pipes (61) arranged side by side; the transverse water pipes (61) are connected to the vertical water pipes (60) via arc-shaped elbows.

4. The circulating pump testing system according to claim 3, characterized in that: The arc-shaped curved pipe is provided with a first arc-shaped curved pipe (62) and a second arc-shaped curved pipe (63) having different radii.

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

6. The circulating pump testing system according to claim 3, characterized in that: 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 system according to claim 2, characterized in that: 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 system according to claim 1, characterized in that: A cache auxiliary water tank (400) is also provided between the endurance test station (220) and the main water tank (300); and a cache control valve (410) is provided between the cache auxiliary water tank (400) and the main water tank (300).

9. The circulating pump testing system 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 cache auxiliary water tank (400) via pipelines.

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

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