Air storage tank

Abstract

The utility model provides an air storage tank which comprises a tank body, a drainage device arranged at the lowest position of the tank body, an air inlet pipe arranged at the top end of the tank body, a filter tank arranged at the top of the tank body and corresponding to the bottom end of the air inlet pipe, and a water return pipe with two ends respectively connected with the drainage device and the filter tank, therefore, the water drained from the drainage device is conveyed into the filter tank. According to the utility model, accumulated water at the bottom of the tank body can be discharged and then flows back to the filter tank, and newly introduced air is washed by water and then enters the tank body, so that the cleanliness of the air in the tank body is improved, and dust is prevented from remaining on the inner wall of the tank body when the water is separated out; the controller can control opening or closing of the electric control valve according to the height of the liquid level in the drainage pipe, so that opening or closing of the electric control valve can be judged according to the amount of residual water in the drainage pipe, automatic accumulated water drainage is achieved, and meanwhile the problem of air overflow does not exist.

Description

Technical Field

[0001] This utility model relates to the field of pressure-resistant container technology, and in particular to an air storage tank. Background Technology

[0002] An air storage tank is a tank-shaped storage device for compressed air. It is widely used in central air conditioning, boilers, water heaters, frequency converters, and constant pressure water supply equipment. It buffers system pressure fluctuations, ensures stable air supply, and reduces airflow pulsation, thereby minimizing system pressure fluctuations. This allows compressed air to pass smoothly through the compressed air purification system, effectively removing oil and water impurities and reducing the load on subsequent oxygen and nitrogen separation devices. It also ensures stable system water pressure even with slight changes in pressure, preventing the water pump from frequently starting due to pressure variations.

[0003] Air storage tanks are typically made of metal materials such as carbon steel and stainless steel, possessing sufficient strength and pressure resistance. The tank shape is generally cylindrical or spherical to withstand internal pressure. Considering that air contains moisture, when compressed and heated, some water will precipitate out due to the increased air density. This water will then adhere to the tank walls as they cool. Therefore, air storage tanks generally have a drain valve.

[0004] Chinese invention patent CN119289266A discloses a compressed air storage tank. This invention relates to the field of compressed air tank technology. The tank includes a sponge block that absorbs water from a circular tank until it is saturated, at which point the absorbed water slowly overflows from below. An annular through-hole is formed at the top of the sponge block, and a return spring is fixedly connected to the inner wall of the annular through-hole. A cross-shaped pressure rod is fixedly connected to the top of the return spring, and a bottom circular plate is fixedly connected to the bottom of the return spring. This compressed air storage tank absorbs water by placing a sponge block at the bottom of the annular through-hole and slowly discharges it through saturation overflow. This prevents the simultaneous discharge of gas during water discharge, which would lead to a significant loss of air from the storage tank after multiple drainage cycles. Furthermore, by placing multiple sponge blocks inside the annular cylinder, the permeability of the sponge blocks is reduced, preventing compressed air from slowly overflowing outwards when there is little water in the circular tank.

[0005] While the aforementioned patent allows for automatic drainage, it still has certain drawbacks. Because it uses sponge blocks for water absorption and drainage, some air inevitably leaks out, leading to a slow loss of stored air. Furthermore, since air inevitably contains dust, the dust adhering to the inner walls when water evaporates can cause caking over time, potentially affecting the tank's pressure resistance. Therefore, a better air storage tank is needed. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the present invention provides an air storage tank, which solves the problems of the automatic drainage device causing the stored air to be lost, and the dust in the air adhering to the inner wall of the storage tank as water is extracted.

[0007] According to an embodiment of this utility model, an air storage tank includes a tank body, which is a vertically arranged hollow cylindrical structure. The bottom of the tank body tapers in a conical shape, and a drainage device is provided at the lowest position. An air inlet pipe is provided at the top of the tank body, and the portion of the air inlet pipe inside the tank body is in a vertical state. A filter groove is also provided at the top of the tank body corresponding to the bottom end of the air inlet pipe. The top of the filter groove is open, allowing the bottom end of the air inlet pipe to pass through the opening and extend into the filter groove. The tank body also includes a return water pipe that is disposed outside the tank body. The two ends of the return water pipe are connected to the drainage device and the filter groove, respectively, thereby transporting the water discharged from the drainage device to the filter groove. A water outlet pipe that connects to the outside of the tank body is also provided at the bottom of the filter groove.

[0008] Furthermore, the drainage device includes a drainage pipe and a controller that works in conjunction with the drainage pipe. The drainage pipe is a vertical tubular structure, and an electrically controlled valve is installed between the bottom of the drainage pipe and the return water pipe. The controller controls the opening or closing of the electrically controlled valve according to the liquid level inside the drainage pipe.

[0009] Furthermore, the drain pipe is equipped with a vertical partition net, which divides the drain pipe into an independent vertical cavity on one side. The controller includes an upper contact switch and a lower contact switch at the upper and lower ends of the vertical cavity, and a float block between the upper and lower contact switches. When the float block contacts the upper contact switch, the upper contact switch controls the electric valve to open. When the float block contacts the lower contact switch, the lower contact switch controls the electric valve to close.

[0010] Furthermore, a filter press is also installed on the return water pipe, and the outlet of the filter press is connected to the filter tank via the return water pipe.

[0011] Furthermore, the filter tank is a spherical shell-shaped tank structure, the return water pipe passes through the top side of the filter tank and connects to the inside, and an outlet valve is also provided at the connection between the filter tank and the outlet pipe.

[0012] Furthermore, the air inlet pipe is closed at one end inside the filter tank, and the air inlet pipe is provided with several air holes.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this utility model, a filter tank is provided at the top of the tank and a drainage device is provided at the bottom. At the same time, the drainage device and the filter tank are connected by a return water pipe. The water accumulated at the bottom of the tank can be drained and then flowed back into the filter tank. The newly introduced air is washed with water before entering the tank, thereby filtering out the dust and other impurities contained therein, improving the cleanliness of the air in the tank, and preventing dust from remaining on the inner wall of the tank when water is separated, thus maintaining the pressure resistance stability of the tank for long-term use.

[0015] 2. The drainage device of this utility model includes a drainage pipe and a controller that is matched with the drainage pipe. An electrically controlled valve is installed between the bottom of the drainage pipe and the return pipe. The controller can control the opening or closing of the electrically controlled valve according to the liquid level inside the drainage pipe. Therefore, the opening and closing of the electrically controlled valve can be determined according to the amount of residual water inside the drainage pipe. It opens when there is a lot of water and closes when there is little water, thereby realizing automated drainage of accumulated water and eliminating the problem of air overflow. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the drainage device in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the filter tank in an embodiment of the present invention.

[0019] In the above attached diagram: 1. Tank body; 2. Drainage device; 3. Filter tank; 4. Return water pipe; 5. Air inlet pipe; 6. Filter press; 21. Drain pipe; 22. Separator; 23. Vertical cavity; 24. Upper contact switch; 25. Lower contact switch; 26. Float; 27. Electrically controlled valve; 31. Water outlet pipe; 51. Air vent. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown in the figure, this utility model embodiment proposes an air storage tank, including a tank body 1. The tank body 1 is a vertically arranged hollow cylindrical structure with a tapered bottom, thereby collecting the accumulated water inside to the bottom.

[0022] A drainage device 2 is installed at the lowest point of the tank body 1, and an air inlet pipe 5 is installed at the top of the tank body 1. One end of the air inlet pipe 5 is connected to a high-pressure air pump to compress outside air and introduce it into the tank body 1. The portion of the air inlet pipe 5 inside the tank body 1 is vertical. A filter tank 3 is also installed at the top of the tank body 1 corresponding to the bottom end of the air inlet pipe 5. The top of the filter tank 3 is open, allowing the bottom end of the air inlet pipe 5 to extend into the filter tank 3 through the opening. A return water pipe 4 is also included, which is installed outside the tank body 1. The two ends of the return water pipe 4 are connected to the drainage device 2 and the filter tank 3, respectively, to transport the water discharged from the drainage device 2 into the filter tank 3. A water outlet pipe 31 is also installed at the bottom of the filter tank 3, connecting to the outside of the tank body 1.

[0023] The water collected at the bottom of tank 1 can be drained through the return water pipe 4 and then returned to the filter tank 3. This allows newly introduced air to be washed with water before entering the tank 1, thereby filtering out dust and other impurities, improving the cleanliness of the air inside tank 1, and preventing dust residue from remaining on the inner wall of tank 1 when water is separated out. It should be noted that a return pump is installed on the return water pipe 4 to transport the water discharged from the bottom of tank 1 to the filter tank 3 at the top of tank 1. Preferably, a filter press 6 is also installed on the return water pipe 4. The outlet of the filter press 6 is connected to the filter tank 3 via the return water pipe 4, which filters out residual impurities in the discharged water and prevents water containing impurities from flowing back into the filter tank 3, thus affecting the air filtration effect.

[0024] In this embodiment, the drainage device 2 further includes a drain pipe 21 and a controller that works in conjunction with the drain pipe 21. The drain pipe 21 is a vertical tubular structure, and an electrically controlled valve 27 is installed between the bottom of the drain pipe 21 and the return water pipe 4. The controller controls the opening or closing of the electrically controlled valve 27 based on the liquid level inside the drain pipe 21. Therefore, the opening and closing of the electrically controlled valve 27 can be determined based on the amount of residual water inside the drain pipe 21; it opens when there is a lot of water and closes when there is little water, thereby achieving automated water drainage without the problem of air overflow.

[0025] like Figure 2As shown, specifically, a vertical partition net 22 is provided inside the drain pipe 21. The partition net 22 divides the drain pipe 21 into an independent vertical cavity 23 on one side. The controller includes an upper contact switch 24 and a lower contact switch 25 located at the upper and lower ends of the vertical cavity 23, and a float 26 located between the upper contact switch 24 and the lower contact switch 25. When the float 26 contacts the upper contact switch 24, the upper contact switch 24 controls the electrically controlled valve 27 to open; when the float 26 contacts the lower contact switch 25, the lower contact switch 25 controls the electrically controlled valve 27 to close. Because the partition net 22 is a permeable structure, the liquid level in the drain pipe 21 and the vertical cavity 23 is always the same. Therefore, the float 26 can directly reflect the liquid level height inside the drain pipe 21, thereby controlling the opening and closing of the electrically controlled valve 27 according to the position of the float 26.

[0026] like Figure 3 As shown in the preferred embodiment, the filter tank 3 has a spherical shell structure. This allows for increased volume while maintaining a small top opening, enabling better air contact with water, and reducing the likelihood of water splashing out from the top due to air bubbles. The return water pipe 4 passes through the top side of the filter tank 3 and connects to the interior. A water outlet valve is also provided at the connection between the filter tank 3 and the outlet pipe 31. The outlet valve works in conjunction with the return pump, ensuring that the amount of water pumped into the filter tank 3 by the return pump is the same as the amount of water discharged from the outlet valve, thereby maintaining a stable liquid level inside the filter tank 3. Correspondingly, the air inlet pipe 5 is closed at one end inside the filter tank 3, and has several air holes 51. This allows air to disperse into small bubbles, ensuring more thorough contact with the water and achieving a better filtration and purification effect.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An air storage tank, characterized in that: The device includes a tank, which is a vertically arranged hollow cylindrical structure with a tapered bottom and a drainage device at the lowest point. An air inlet pipe is located at the top of the tank, with the portion of the air inlet pipe inside the tank in a vertical position. A filter tank is also located at the top of the tank corresponding to the bottom of the air inlet pipe, with an opening at the top of the filter tank allowing the bottom of the air inlet pipe to extend into the filter tank. The device also includes a return water pipe located outside the tank, with both ends connected to the drainage device and the filter tank, respectively, to transport water discharged from the drainage device into the filter tank. An outlet water pipe, connecting to the outside of the tank, is located at the bottom of the filter tank.

2. An air storage tank as described in claim 1, characterized in that: The drainage device includes a drain pipe and a controller that works in conjunction with the drain pipe. The drain pipe is a vertical tubular structure, and an electrically controlled valve is installed between the bottom of the drain pipe and the return pipe. The controller controls the opening or closing of the electrically controlled valve according to the liquid level inside the drain pipe.

3. An air storage tank as described in claim 2, characterized in that: The drain pipe is equipped with a vertical partition net, which divides the drain pipe into an independent vertical cavity on one side. The controller includes an upper contact switch and a lower contact switch at the upper and lower ends of the vertical cavity, and a float block between the upper and lower contact switches. When the float block contacts the upper contact switch, the upper contact switch controls the electric valve to open. When the float block contacts the lower contact switch, the lower contact switch controls the electric valve to close.

4. An air storage tank as described in claim 1, characterized in that: A filter press is also installed on the return water pipe, and the outlet of the filter press is connected to the filter tank via the return water pipe.

5. An air storage tank as described in claim 1, characterized in that: The filter tank is a spherical shell-shaped tank structure. The return water pipe passes through the top side of the filter tank and connects to the inside. An outlet valve is also provided at the connection between the filter tank and the outlet pipe.

6. An air storage tank as described in claim 1, characterized in that: The air inlet pipe is closed at one end inside the filter tank, and has several air holes.

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