Circulating water tank type experiment table

Abstract

The invention relates to the technical field of experiment instruments, in particular to a circulating water tank type experiment table. The device comprises a supporting module and an experiment module, the supporting module comprises a test bench body, the experiment module is installed on the top of the test bench body, the experiment module comprises a water storage mechanism, a water pumping mechanism, a cleaning mechanism and a heat exchanger, and the water storage mechanism, the water pumping mechanism and the heat exchanger are connected through pipelines to form a circulation loop; according to the circulating water tank type experiment table, vortexes can be generated in the horizontal direction and the vertical direction during water pumping through the arranged water pumping mechanism, the driving force of the vortexes in the horizontal direction is used for driving the bottom of the cleaning mechanism to be tightly attached to the water tank body, and the driving force of the vortexes in the vertical direction is used for driving the cleaning mechanism to rotate; and the rotating cleaning cylinder can change the contact position of the cleaning cylinder and the filter plate, so that water scale is prevented from being gathered at a single part on the cleaning mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of experimental instruments, in particular to a circulating water tank type experimental table. Background Art

[0002] When conducting heat transfer experiments, a circulating water tank test bench is usually required. The basic principle is to inject water into the water tank and change its temperature, then use a water pump to pump the temperature-changed water into the heat exchanger for heat exchange, and the water after the heat exchange is completed will flow back into the water tank. The water tank, water pump, and heat exchanger are connected by pipes. Since the water added to the water tank usually contains compounds of elements such as calcium and magnesium (that is, the hardness of the water is usually high), the water added to the water tank will produce scale (that is, calcium and magnesium compounds crystallize and precipitate) after heating, especially at the inlet of the water pump. Due to the existence of a certain negative pressure and water flow disturbance, calcium and magnesium compounds are more likely to precipitate than other parts. After long-term use, scale is adsorbed in the water inlet pipe of the water pump, which will gradually reduce the inner diameter of the water inlet pipe, affecting the efficiency of pumping water, and thus affecting the results of the heat transfer experiment.

[0003] In order to solve the above problems, a common practice in the prior art is to add flocculants to absorb scale, and then set up a filter device to intercept the flocculants. Although this can effectively prevent scale from entering the water pump, as the use time increases, since the flocculants are usually placed around the filter device, the scale wraps around the surface of the flocculants to form a "protective shell", making it impossible for the internal flocculants to absorb the scale around the filter device, thereby reducing the service life of the flocculants and requiring frequent replacement.

[0004] In view of this, we propose a circulating water tank test bench to improve the shortcomings of the existing technology. Summary of the invention

[0005] The purpose of the present invention is to provide a circulating water tank type test bench to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides a circulating water tank type test bench, comprising a support module and an experimental module, wherein the support module comprises a test bench body, the experimental module is installed on the top of the test bench body, the experimental module comprises a water storage mechanism, a water pumping mechanism, a cleaning mechanism and a heat exchanger, the water storage mechanism, the water pumping mechanism and the heat exchanger are connected to each other through pipelines to form a circulation loop, the water storage mechanism at least comprises a water tank body, and the cleaning mechanism is rotatably connected to the top of the connection between the water tank body and the water pumping mechanism;

[0007] The water storage mechanism is used to adjust the temperature of the water added to the inside of the water tank body, and the pumping mechanism is used to pump the water after the temperature adjustment to the heat exchanger, and the heat exchanger uses the water from the pumping mechanism to perform a heat transfer experiment;

[0008] The horizontal driving force of the vortex formed when the pumping mechanism pumps water is used to drive the bottom of the cleaning mechanism to be close to the water tank body;

[0009] The vertical driving force of the vortex formed when the pumping mechanism pumps water is used to drive the cleaning mechanism to rotate so as to scrape the connection between the pumping mechanism and the water tank body;

[0010] The rotating cleaning mechanism can change the position where the cleaning mechanism contacts the water pumping mechanism.

[0011] As a further improvement of the present technical solution, the water storage mechanism further comprises a water inlet, a water outlet and a water return outlet which are provided on the side wall of the water tank body, and an electric heater is provided on the top of the water tank body.

[0012] As a further improvement of the present technical solution, the pumping mechanism includes a connecting pipe connected to the water outlet, one end of the connecting pipe away from the water outlet is connected to a water pump, and one end of the water pump away from the connecting pipe is connected to the heat exchanger.

[0013] As a further improvement of the technical solution, a filter plate is clamped at one end of the connecting pipe away from the water pump, and a side of the filter plate away from the water pump extends into the interior of the water tank body.

[0014] As a further improvement of the present technical solution, the cleaning mechanism includes a rotating bolt rotatably connected to the top of the water outlet, and a plurality of connecting bolts are fixedly connected to the periphery of the rotating bolt. The plurality of connecting bolts are all located inside the water tank body, and a cleaning barrel is provided at one end of each connecting bolt away from the rotating bolt, and one side of the cleaning barrel located at the bottom is close to the filter plate.

[0015] As a further improvement of the technical solution, a plurality of the cleaning barrels are distributed in a circular array around the rotating bolt.

[0016] As a further improvement of the present technical solution, the cleaning cylinder includes a pair of parallel flat portions, both ends of the two flat portions being fixedly connected with arc-shaped portions, a plurality of connecting holes are provided on the arc-shaped portion close to the filter plate, and the two flat portions and the two arc-shaped portions form a storage cavity.

[0017] As a further improvement of the technical solution, flocculant is contained in the storage cavity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the circulating water tank type test bench, the pumping mechanism is arranged to generate vortices in both horizontal and vertical directions when pumping water. The driving force of the vortex in the horizontal direction is used to drive the bottom of the cleaning mechanism to be close to the water tank body, and the driving force of the vortex in the vertical direction is used to drive the cleaning mechanism to rotate, so as to scrape the connection between the pumping mechanism and the water tank body. The rotating cleaning cylinder can change the position of its own contact with the filter plate, thereby preventing scale from accumulating at a single position on the cleaning mechanism, that is, multiple rotating cleaning cylinders adopt an intermittent circulation working mode, which greatly prolongs the use time of the flocculant in the cleaning cylinder and reduces the frequency of replacing the flocculant. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a cutaway perspective view of an experimental module of the present invention;

[0022] Figure 3 is a cutaway perspective view of the water storage mechanism of the present invention;

[0023] Figure 4 is a cutaway perspective view of the pumping mechanism of the present invention;

[0024] Figure 5 For the present invention Figure 2 The enlarged view of point A in the middle;

[0025] Figure 6 The first is a three-dimensional structural diagram of the cleaning mechanism of the present invention;

[0026] Figure 7 The second is a three-dimensional structural diagram of the cleaning mechanism of the present invention;

[0027] Figure 8 A front view of the cleaning tube of the present invention;

[0028] Fig. 9 It is a cutaway perspective view of the cleaning tube of the present invention.

[0029] The meaning of each number in the figure is:

[0030] 100. Test bench body; 110. Heat exchanger;

[0031] 200, water storage mechanism; 210, water tank body; 211, water inlet; 212, water outlet; 213, water return outlet; 220, electric heater;

[0032] 300, pumping mechanism; 310, connecting pipe; 320, water pump; 330, filter plate;

[0033] 400, cleaning mechanism; 410, rotating bolt; 420, connecting bolt; 430, cleaning cylinder; 431, flat portion; 432, arc-shaped portion; 433, connecting hole; 434, storage chamber. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] Generally speaking, water that has not been specially softened usually contains calcium and magnesium compounds to a greater or lesser extent, which will form scale in the water tank after being added, affecting the accuracy of the results of the heat transfer experiment. Therefore, a filter device (i.e., filter plate 330 hereinafter) is provided at the water inlet of the pumping device (water pump 320 to be described below) to reduce the scale from entering the heat exchange device (heat exchanger 110 to be described below). Figure 1 and Figure 2As shown, the purpose of this embodiment is to provide a circulating water tank type test bench, including a support module and an experimental module, the support module includes a test bench body 100, the experimental module is installed on the top of the test bench body 100, the experimental module includes a water storage mechanism 200, a pumping mechanism 300, a cleaning mechanism 400 and a heat exchanger 110, the water storage mechanism 200, the pumping mechanism 300 and the heat exchanger 110 are connected to each other through pipelines to form a circulation loop, the water storage mechanism 200 at least includes a water tank body 210, and the cleaning mechanism 400 is rotatably connected to the top of the connection between the water tank body 210 and the pumping mechanism 300;

[0038] The water storage mechanism 200 is used to adjust the temperature of the water added to the water tank body 210. The pumping mechanism 300 pumps the water after the temperature adjustment to the heat exchanger 110. The heat exchanger 110 uses the water from the pumping mechanism 300 to perform a heat transfer experiment. After the experiment is over, the water is transported back to the water tank body 210.

[0039] When the pumping mechanism 300 pumps water, vortices will be generated in both horizontal and vertical directions. The driving force of the vortex in the horizontal direction is used to drive the bottom of the cleaning mechanism 400 to be close to the water tank body 210;

[0040] The driving force of the vortex in the vertical direction is used to drive the cleaning mechanism 400 to rotate so as to scrape the connection between the pumping mechanism 300 and the water tank body 210;

[0041] The rotating cleaning mechanism 400 can change the position where it contacts the pumping mechanism 300 , thereby preventing scale from accumulating at a single location on the cleaning mechanism 400 .

[0042] In order to transport water of different temperatures into the heat exchanger 110, a water storage mechanism 200 capable of adjusting the water temperature is provided. Figure 3 As shown, the water storage mechanism 200 further includes a water inlet 211 , a water outlet 212 and a water return port 213 which are provided on the side wall of the water tank body 210 , and an electric heater 220 is provided on the top of the water tank body 210 .

[0043] The improvement lies in that water is injected into the water tank body 210 through the water injection port 211, and the water is submerged in the electric heater 220, and then the power of the electric heater 220 is turned on to heat the water to the temperature required for the heat transfer experiment (different experiments require different specific water temperatures, which can be adjusted by the electric heater 220), and then the pumping mechanism 300 is started to pump water at the temperature required for the heat transfer experiment into the heat exchanger 110. After the heat exchange experiment is completed, the water is transported back to the water tank body 210 to form a circulation loop.

[0044] Scale formed after water is heated tends to gather at the inlet of the pumping mechanism 300. Over time, the inner diameter of the inlet will gradually decrease, thereby affecting the pumping efficiency of the pumping mechanism 300 and the subsequent heat transfer experiments. Therefore, the inlet of the pumping mechanism 300 is optimized.

[0045] exist Figure 4 and Figure 5 In the embodiment, the pumping mechanism 300 includes a connecting pipe 310 connected to the water outlet 212 , an end of the connecting pipe 310 away from the water outlet 212 is connected to a water pump 320 , and an end of the water pump 320 away from the connecting pipe 310 is connected to the heat exchanger 110 .

[0046] The improvement lies in that: the end of the connecting pipe 310 away from the water pump 320 is clamped with the filter plate 330 , and the side of the filter plate 330 away from the water pump 320 extends into the interior of the water tank body 210 .

[0047] It should be noted that, since the edge of the water inlet is not smooth, has edges and corners, or has local protrusions, the water flow will be disturbed when passing through these parts, and it is easier to generate eddies. For example, because the edges and corners of the square can cause the direction of the water flow to change suddenly, destroying the stability of the water flow, eddies are formed at the corners of the square or rectangular water outlet 212. When the water pump 320 is turned on to pump water from the water tank body 210, a certain negative pressure will be formed near the water outlet 212, making it easier for calcium and magnesium compounds in the water to crystallize and precipitate under the action of pressure changes and water flow disturbances, and adhere to the inner wall of the connecting pipe 310. The filter plate 330 arranged at the inlet of the connecting pipe 310 can effectively intercept the scale precipitated near the inlet of the connecting pipe 310.

[0048] The filter plate 330 can intercept scale to prevent it from entering the connecting pipe 310 and affecting the subsequent heat transfer experiment. However, as the working time increases, the scale intercepted by the filter plate 330 will gradually accumulate on the filter plate 330, and may even block the filter holes on the filter plate 330. Therefore, a cleaning mechanism 400 is provided to clean the scale accumulated on the filter plate 330.

[0049] Next, through Figure 6 and Figure 7 The specific structure of the cleaning mechanism 400 is disclosed. The cleaning mechanism 400 includes a rotating bolt 410 rotatably connected above the water outlet 212. A plurality of connecting bolts 420 are fixedly connected to the periphery of the rotating bolt 410. The plurality of connecting bolts 420 are all located on the inner side of the water tank body 210. A cleaning cylinder 430 is provided at one end of each connecting bolt 420 away from the rotating bolt 410. One side of the cleaning cylinder 430 located at the bottom is close to the filter plate 330.

[0050] Furthermore, a plurality of cleaning cylinders 430 are distributed in a circular array around the periphery of the rotating bolt 410 .

[0051] That is to say, when the water pump 320 draws water from the water tank body 210, a vortex is formed near the filter plate 330. The horizontal driving force of the vortex makes the cleaning barrel 430 close to the side wall of the filter plate 330. At the same time, the vertical driving force of the vortex drives the cleaning barrel 430 to rotate around the rotating bolt 410. After each cleaning barrel 430 rotates, it continuously scrapes the surface of the filter plate 330, thereby preventing scale from gathering on the filter plate 330.

[0052] The rotating cleaning cylinder 430 continuously scrapes the surface of the filter plate 330, which can prevent scale from accumulating on the surface of the filter plate 330. However, inevitably, a small amount of calcium and magnesium compound crystals will still enter the filter holes of the filter plate 330. The cleaning cylinder 430 can only scrape the surface of the filter plate 330 but cannot scrape the inside of the filter holes. Over time, this will still affect the pumping efficiency of the water pump 320. Therefore, the structure of the cleaning cylinder 430 is further optimized.

[0053] Based on the above description, combined with Figure 8 and Fig. 9 The specific structure of the cleaning cylinder 430 is further disclosed. The cleaning cylinder 430 includes a pair of parallel flat portions 431. Both ends of the two flat portions 431 are fixedly connected with arc-shaped portions 432. A plurality of connecting holes 433 are provided on the arc-shaped portion 432 close to the filter plate 330. The two flat portions 431 and the two arc-shaped portions 432 form a storage cavity 434.

[0054] Furthermore, the storage chamber 434 contains flocculant.

[0055] It should be noted that the flocculant is polyaluminium chloride, so that the scale generated near the filter plate 330 can enter the cleaning barrel 430 and be adsorbed by the flocculant, and the flocculant will not pass through the connecting hole 433. Therefore, the scale is adsorbed by the flocculant and enters the cleaning barrel 430, and the scale entering the filter hole of the filter plate 330 becomes very small, thereby greatly reducing the number of cleaning and replacement of the filter plate 330. In addition, multiple cleaning barrels 430 are arranged on the periphery of the rotating bolt 410. The amount of calcium and magnesium compounds precipitated near the filter plate 330 is more than that of other parts, and only the cleaning barrel 430 driven by the vertical driving force of the eddy current to rotate near the filter plate 330 plays a major adsorption role. The amount of scale adsorbed by the cleaning barrels 430 located in other parts is less. In other words, the multiple rotating cleaning barrels 430 work intermittently and cyclically, which greatly prolongs the use time of the flocculant in the cleaning barrel 430 and reduces the frequency of replacing the flocculant.

[0056] In summary, the working principle of the present invention is as follows:

[0057] First, water is injected into the water tank body 210 through the water inlet 211, and the water is heated to the required temperature through the electric heater 220. Then, the power of the water pump 320 is turned on, and the water pump 320 pumps water into the heat exchanger 110. After the heat exchange experiment is completed, the water is transported back to the water tank body 210 to form a circulation loop.

[0058] When the water pump 320 pumps water, negative pressure is formed at the inlet of the connecting pipe 310 , making it easy for scale to precipitate near this part, and most of the scale is intercepted by the filter plate 330 .

[0059] As the working time increases, the scale intercepted by the filter plate 330 will gradually accumulate on the filter plate 330, and the vertical driving force of the vortex generated by the water pump 320 will clean the flat part 431 of the cylinder 430, while the horizontal driving force of the vortex will drive the arc-shaped part 432 of the cleaning cylinder 430 to stick to the side wall of the filter plate 330, and the rotating cleaning cylinder 430 will scrape off the scale on the surface of the filter plate 330.

[0060] Next, the flocculant in the storage chamber 434 produces an adsorption effect when it meets water, and adsorbs the scale that is about to enter (or has already entered) the filter holes of the filter plate 330 to prevent the scale from clogging the filter holes. In addition, the flocculant inside the rotating cleaning cylinder 430 adopts an intermittent circulation working mode, which reduces the number of times the cleaning cylinder 430 is cleaned and replaced.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A circulating water tank type test bench, comprising a support module and an experimental module, wherein the support module comprises a test bench body (100), the experimental module is installed on the top of the test bench body (100), the experimental module comprises a water storage mechanism (200), a water pumping mechanism (300), a cleaning mechanism (400) and a heat exchanger (110), wherein the water storage mechanism (200), the water pumping mechanism (300) and the heat exchanger (110) are connected to each other through a pipeline to form a circulation loop, the water storage mechanism (200) at least comprises a water tank body (210), and the cleaning mechanism (400) is rotatably connected to the top of the connection between the water tank body (210) and the water pumping mechanism (300), characterized in that: The water storage mechanism (200) is used to adjust the temperature of water added to the inside of the water tank body (210), and the water pumping mechanism (300) is used to pump the water after the temperature adjustment to the heat exchanger (110). The heat exchanger (110) uses the water from the water pumping mechanism (300) to perform a heat transfer experiment; The horizontal driving force of the vortex formed when the pumping mechanism (300) pumps water is used to drive the bottom of the cleaning mechanism (400) to be close to the water tank body (210); The vertical driving force of the vortex formed when the pumping mechanism (300) pumps water is used to drive the cleaning mechanism (400) to rotate, so as to scrape the connection between the pumping mechanism (300) and the water tank body (210); The rotating cleaning mechanism (400) can change the position where it contacts the water pumping mechanism (300).

2. The circulating water tank type test bench according to claim 1 is characterized in that: The water storage mechanism (200) further comprises a water inlet (211), a water outlet (212) and a water return outlet (213) which are arranged on the side wall of the water tank body (210); an electric heater (220) is arranged on the top of the water tank body (210).

3. The circulating water tank type test bench according to claim 2 is characterized in that: The water pumping mechanism (300) comprises a connecting pipe (310) connected to the water outlet (212); one end of the connecting pipe (310) away from the water outlet (212) is connected to a water pump (320); and one end of the water pump (320) away from the connecting pipe (310) is connected to the heat exchanger (110).

4. The circulating water tank type test bench according to claim 3 is characterized in that: The end of the connecting pipe (310) away from the water pump (320) is clamped with a filter plate (330), and the side of the filter plate (330) away from the water pump (320) extends into the interior of the water tank body (210).

5. The circulating water tank type test bench according to claim 4 is characterized in that: The cleaning mechanism (400) comprises a rotating bolt (410) rotatably connected to the top of the water outlet (212); a plurality of connecting bolts (420) are fixedly connected to the periphery of the rotating bolt (410); the plurality of connecting bolts (420) are all located inside the water tank body (210); a cleaning cylinder (430) is provided at one end of each connecting bolt (420) away from the rotating bolt (410); and one side of the cleaning cylinder (430) located at the bottom is in close contact with the filter plate (330).

6. The circulating water tank type test bench according to claim 5 is characterized in that: The plurality of cleaning cylinders (430) are distributed in a circular array on the periphery of the rotating bolt (410).

7. The circulating water tank type test bench according to claim 6 is characterized in that: The cleaning cylinder (430) comprises a pair of parallel flat portions (431), both ends of the two flat portions (431) being fixedly connected with arc-shaped portions (432), a plurality of connecting holes (433) being provided on the arc-shaped portion (432) close to the filter plate (330), and the two flat portions (431) and the two arc-shaped portions (432) forming a storage cavity (434).

8. The circulating water tank type test bench according to claim 7 is characterized in that: The storage cavity (434) contains a flocculant.

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