An expansion tank

Abstract

The utility model relates to water tank technical field especially relates to an expansion type water tank. Its technical scheme includes the box, the water inlet of being located at the top of box, the water outlet of being located at the bottom of box, still includes the fixed installation in the telescopic expansion box of box, installs the constant pressure module of expansion constant pressure to the expansion box of both sides of box, the constant pressure module includes the transmission case and pressure chamber that intercommunication, the pressure chamber and transmission case fill liquid, the transmission case in sliding installation has with expansion fixed connection of sealing plate of box. The utility model adopts constant pressure module and can provide stable unchangeable system pressure, compares with nonlinear air bag, avoids pressure fluctuation, makes system pressure keep constant on the set operating point, no matter how much expansion water volume is, avoids the risk that air bag pressure sharply climbs in high pressure area, also eliminates the hidden danger that low pressure area buffer is insufficient, improves system pressure stability greatly, can realize effective volume utilization more.

Description

Technical Field

[0001] This utility model relates to the field of water tank technology, and in particular to an expansion water tank. Background Technology

[0002] Expansion tanks are crucial pressure stabilization and media protection devices in modern closed-loop water systems. Their core function is to accommodate the volume expansion and contraction of the media within the system due to temperature changes. When the system is running, the media expands due to heat, increasing in volume. The expansion tank absorbs this expansion through the compression and deformation of its built-in elastic rubber bladder, preventing a rapid increase in system pressure that could lead to safety valve depressurization or equipment damage. Conversely, when the system's cooling media contracts, the bladder rebounds under the pressure of pre-filled nitrogen or dry air, pushing the stored media back into the system.

[0003] The bladder-type expansion tank relies on the nonlinear characteristics of gas compression. When the bladder is compressed more deeply, the system pressure rises exponentially, which leads to a significant increase in the actual working pressure fluctuation range of the system. In order to avoid extreme pressure, a safety air chamber space must be reserved, which greatly reduces the effective volume utilization rate and forces the tank size to be increased during the selection process. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an expansion tank that provides a stable and constant system pressure.

[0005] The technical solution of this utility model: An expansion tank, comprising a tank body, an inlet located at the top of the tank body, an outlet located at the bottom of the tank body, and further comprising:

[0006] A retractable expansion box that is fixedly installed inside the enclosure;

[0007] The constant pressure module, which applies constant pressure to the expansion box, is installed on both sides of the box body. The constant pressure module includes a transmission box and a pressure box that are interconnected. The pressure box and the transmission box are filled with liquid. A sealing plate that is fixedly connected to the expansion box is slidably installed in the transmission box.

[0008] The constant pressure module also includes a storage tank and a tilting assembly. The storage tank stores the liquid discharged from the pressure tank when the sealing plate moves. The tilting assembly controls the liquid inside the storage tank to enter the pressure tank when the liquid level inside the pressure tank drops.

[0009] Optionally, the constant pressure module includes a connecting plate fixedly installed on the expansion box, a connecting rod fixedly installed on the connecting plate, a sealing plate fixedly connected to the connecting rod, and the transmission box and the pressure box connected by a delivery pipe.

[0010] Optionally, the storage box is rotatably connected to the box body, the storage box is provided with an inlet, and a drain pipe is fixedly installed on the top of the pressure box, with the other end of the drain pipe located above the inlet.

[0011] Optionally, the pressure box is slidably connected to the box body, a support plate is fixedly installed inside the box body, and an elastic element is fixedly installed between the pressure box and the support plate.

[0012] Optionally, a one-way valve is fixedly installed on the pressure box, and a connecting pipe is fixedly installed on the one-way valve, the connecting pipe being connected to the storage box.

[0013] Optionally, the tilting assembly includes a first transmission cylinder fixedly mounted on a support plate, a first sealing plate slidably mounted inside the first transmission cylinder, a first transmission shaft fixedly mounted on the first sealing plate, the first transmission shaft being fixedly connected to the pressure box, a second transmission cylinder rotatably mounted inside the box, a second sealing plate slidably mounted inside the second transmission cylinder, a second transmission shaft fixedly mounted on the second sealing plate, and the second transmission shaft being rotatably connected to the storage box.

[0014] Optionally, both ends of the first and second transmission cylinders are connected by oil pipes, and the first transmission cylinder, the second transmission cylinder, and the oil pipes are all filled with hydraulic medium.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This application uses a constant pressure module that can provide a stable and constant system pressure. Compared with nonlinear airbags, it avoids pressure fluctuations and keeps the system pressure constant at the set operating point, regardless of the amount of water expansion. This avoids the risk of a sharp increase in pressure in the high-pressure area of ​​the airbag and also eliminates the hidden danger of insufficient buffering in the low-pressure area, greatly improving the stability of system pressure and enabling more effective volume utilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an expansion tank;

[0018] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0019] Figure 3 This is a schematic diagram of the expansion box structure;

[0020] Figure 4 This is a schematic diagram of the constant voltage module.

[0021] Reference numerals: 1. Box body; 101. Inlet; 102. Outlet; 2. Expansion box; 3. Constant pressure module; 301. Connecting plate; 302. Connecting rod; 303. Sealing plate; 304. Transmission box; 305. Pressure box; 306. Delivery pipe; 307. Storage box; 308. Input port; 309. Drain pipe; 310. Support plate; 311. Elastic element; 312. Check valve; 313. Connecting pipe; 314. First transmission cylinder; 315. First sealing plate; 316. First transmission shaft; 317. Second transmission cylinder; 318. Second sealing plate; 319. Second transmission shaft; 320. Oil pipe. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 and Figure 2 As shown, the present invention proposes an expansion tank, including a tank body 1, an inlet 101 located at the top of the tank body 1, an outlet 102 located at the bottom of the tank body 1, and a retractable expansion box 2 fixedly installed inside the tank body 1. The expansion box 2 is connected to the inlet 101 and the outlet 102. The expansion box 2 can expand under the action of internal water pressure to prevent the internal water pressure from increasing rapidly.

[0024] like Figures 2 to 4 As shown, this embodiment also includes a constant pressure module 3 installed on both sides of the housing 1 to apply constant pressure to the expansion box 2. The constant pressure module 3 includes a transmission box 304 and a pressure box 305 that are interconnected. The pressure box 305 and the transmission box 304 are filled with liquid. A sealing plate 303 that is fixedly connected to the expansion box 2 is slidably installed in the transmission box 304. The liquid inside the pressure box 305 will apply hydraulic pressure to the sealing plate 303 under the action of gravity. Since the sealing plate 303 is fixedly connected to the expansion box 2, the hydraulic pressure inside the pressure box 305 will act on the expansion box 2.

[0025] The constant pressure module 3 includes a connecting plate 301 fixedly installed on the expansion box 2, a connecting rod 302 fixedly installed on the connecting plate 301, a sealing plate 303 fixedly connected to the connecting rod 302, and a transmission box 304 and a pressure box 305 connected by a conveying pipe 306, which allows the liquid between the transmission box 304 and the pressure box 305 to flow between each other.

[0026] In this embodiment, the storage tank 307 is rotatably connected to the housing 1. The storage tank 307 is provided with an inlet 308. The top of the pressure tank 305 is fixedly installed with a drain pipe 309. The other end of the drain pipe 309 is located above the inlet 308. When the liquid inside the transmission box 304 enters the pressure tank 305, the liquid inside the pressure tank 305 will enter the storage tank 307 through the drain pipe 309.

[0027] Furthermore, the constant pressure module 3 also includes a storage tank 307 and a tilting assembly. The storage tank 307 stores the liquid discharged from the pressure tank 305 when the sealing plate 303 moves. When the liquid level inside the pressure tank 305 drops, the tilting assembly controls the liquid inside the storage tank 307 to enter the pressure tank 305. When the expansion box 2 expands, it will drive the sealing plate 303 to move. The moving sealing plate 303 will cause the liquid inside the transmission box 304 to be squeezed into the pressure tank 305. The liquid that enters the pressure tank 305 will overflow. The overflowing liquid can be collected by the storage tank 307. When the water pressure inside the expansion box 2 decreases, the sealing plate 303 will move under the action of the water pressure inside the pressure tank 305, causing the expansion box 2 to contract. At this time, the liquid level inside the pressure tank 305 drops. It is necessary to rotate the storage tank 307 to allow the liquid to enter the pressure tank 305 to prevent the hydraulic pressure inside the pressure tank 305 from decreasing.

[0028] In this embodiment, the pressure box 305 is slidably connected to the box body 1. A support plate 310 is fixedly installed inside the box body 1. An elastic element 311 is fixedly installed between the pressure box 305 and the support plate 310. When the liquid inside the pressure box 305 decreases, the weight of the pressure box 305 decreases, and the pressure box 305 will rise under the action of the elastic element 311.

[0029] The pressure tank 305 is fixedly equipped with a one-way valve 312, and a connecting pipe 313 is fixedly installed on the one-way valve 312. The connecting pipe 313 is connected to the storage tank 307. Under the action of the one-way valve 312, the liquid inside the storage tank 307 can enter the pressure tank 305 in one direction.

[0030] In this embodiment, the tilting assembly includes a first transmission cylinder 314 fixedly mounted on a support plate 310. A first sealing plate 315 is slidably mounted inside the first transmission cylinder 314. A first transmission shaft 316 is fixedly mounted on the first sealing plate 315 and is fixedly connected to a pressure box 305. A second transmission cylinder 317 is rotatably mounted inside the box 1. A second sealing plate 318 is slidably mounted inside the second transmission cylinder 317 and a second transmission shaft 319 is fixedly mounted on the second sealing plate 318 and is rotatably connected to a storage box 307. Both ends of the first transmission cylinder 314 and the second transmission cylinder 317 are connected by an oil pipe 320. The first transmission cylinder 314, the second transmission cylinder 317, and the oil pipe 320 are all filled with hydraulic fluid. When the pressure box 305 moves up and down, it will drive the first drive shaft 316 to move. The moving first drive shaft 316 will drive the first sealing plate 315 to move. The moving first sealing plate 315 will drive the hydraulic medium inside the pressure box 305 to move. Through the oil pipe 320, it can drive the second sealing plate 318 to move. The movement of the second sealing plate 318 will drive the second drive shaft 319 to move. The movement of the second drive shaft 319 will drive the storage box 307 to rotate, and the liquid inside the storage box 307 will move to one side and enter the pressure box 305 through the connecting pipe 313 to ensure that the pressure box 305 is always full of liquid, which can ensure the stability of the pressure applied to the expansion box 2.

[0031] In this embodiment, the liquid inside the pressure box 305 will apply hydraulic pressure to the sealing plate 303 under the action of gravity. Since the sealing plate 303 is fixedly connected to the expansion box 2, the hydraulic pressure inside the pressure box 305 will act on the expansion box 2. When the expansion box 2 expands, it will drive the sealing plate 303 to move. The moving sealing plate 303 will cause the liquid inside the transmission box 304 to be squeezed into the pressure box 305. The liquid that enters the pressure box 305 will overflow. The overflowing liquid can be collected through the storage box 307.

[0032] When the water pressure inside the expansion box 2 decreases, the water pressure inside the pressure box 305 will cause the sealing plate 303 to move, causing the expansion box 2 to contract. At this time, the liquid level inside the pressure box 305 drops, which will cause the storage box 307 to rotate and move the liquid inside the storage box 307 to one side and enter the pressure box 305 through the connecting pipe 313, so as to ensure that the pressure box 305 is always filled with liquid, which can ensure the stability of the pressure applied to the expansion box 2.

[0033] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An expansion tank, comprising a tank body (1), an inlet (101) at the top of the tank body (1), and an outlet (102) at the bottom of the tank body (1), characterized in that, Also includes: A retractable expansion box (2) is fixedly installed inside the box body (1); The constant pressure module (3) is installed on both sides of the housing (1) to apply constant pressure to the expansion box (2). The constant pressure module (3) includes a transmission box (304) and a pressure box (305) that are interconnected. The pressure box (305) and the transmission box (304) are filled with liquid. A sealing plate (303) that is fixedly connected to the expansion box (2) is slidably installed in the transmission box (304). The constant pressure module (3) also includes a storage tank (307) and a tilting assembly. The storage tank (307) stores the liquid discharged from the pressure tank (305) when the sealing plate (303) moves. The tilting assembly controls the liquid inside the storage tank (307) to enter the pressure tank (305) when the liquid level inside the pressure tank (305) drops.

2. An expansion tank according to claim 1, characterized in that, The constant pressure module (3) includes a connecting plate (301) fixedly installed on the expansion box (2), a connecting rod (302) fixedly installed on the connecting plate (301), a sealing plate (303) fixedly connected to the connecting rod (302), and the transmission box (304) and the pressure box (305) are connected by a conveying pipe (306).

3. An expansion tank according to claim 2, characterized in that, The storage box (307) is rotatably connected to the box body (1). The storage box (307) is provided with an inlet (308). The top of the pressure box (305) is fixedly installed with a drain pipe (309). The other end of the drain pipe (309) is located above the inlet (308).

4. An expansion tank according to claim 3, characterized in that, The pressure box (305) is slidably connected to the box body (1), and a support plate (310) is fixedly installed inside the box body (1). An elastic element (311) is fixedly installed between the pressure box (305) and the support plate (310).

5. An expansion tank according to claim 4, characterized in that, A one-way valve (312) is fixedly installed on the pressure box (305), and a connecting pipe (313) is fixedly installed on the one-way valve (312). The connecting pipe (313) is connected to the storage box (307).

6. An expansion tank according to claim 5, characterized in that, The tilting assembly includes a first transmission cylinder (314) fixedly mounted on a support plate (310), a first sealing plate (315) slidably mounted inside the first transmission cylinder (314), a first transmission shaft (316) fixedly mounted on the first sealing plate (315), the first transmission shaft (316) being fixedly connected to the pressure box (305), a second transmission cylinder (317) rotatably mounted inside the box body (1), a second sealing plate (318) slidably mounted inside the second transmission cylinder (317), a second transmission shaft (319) fixedly mounted on the second sealing plate (318), and the second transmission shaft (319) rotatably connected to the storage box (307).

7. An expansion tank according to claim 6, characterized in that, Both ends of the first transmission cylinder (314) and the second transmission cylinder (317) are connected by oil pipes (320), and the first transmission cylinder (314), the second transmission cylinder (317) and the oil pipes (320) are all filled with hydraulic medium.

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