Expansion tank

Abstract

The utility model discloses an expansion tank which comprises an expansion tank body, a rubber water bag is arranged in the expansion tank body, a port of the rubber water bag extends towards the top of the expansion tank body, a water nozzle flange and a flange seat are arranged at the top of the expansion tank body, and water flows in and out of the rubber water bag through the water nozzle flange. A gas injection pressurizing mechanism is arranged at the bottom of the expansion tank body; the expansion tank is stable in overall structure, has good sealing performance, and is suitable for popularization and use, and the inner container is convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion tanks, in particular to an expansion tank. Background Art

[0002] Expansion tanks are widely used in water supply and fire-fighting equipment such as air conditioners, solar energy, and boilers. They balance the water pressure through internal pressure to ensure overall stable operation.

[0003] The utility model patent with announcement number CN217582289U discloses an expansion tank shell and an expansion tank, including an expansion tank body, an upper cover is provided at the top of the expansion tank body, No. 1 handles are provided on both sides of the top of the upper cover, a first sealing ring is provided at the bottom of the upper cover, a No. 1 buckle is provided around the bottom of the upper cover, a middle tube is provided at the middle end of the expansion tank body, a No. 1 slot is provided around the top of the middle tube, a No. 2 buckle is provided around the bottom of the middle tube, a lower cover is provided at the bottom of the expansion tank body, a No. 2 handle is provided at the middle end of the top of the lower cover, a pressure gauge is provided at the top of the lower cover, a threaded air nozzle mounting hole is provided at the middle end of the lower cover, a second sealing ring is provided at the bottom of the lower cover, and No. 2 slots are provided around the bottom of the lower cover; the technical problems that the expansion tank is difficult to assemble separately and the pressure is difficult to measure are solved.

[0004] However, in actual use, the sealing performance of the expansion tank is poor, the internal pressure gas is prone to leakage, and the inner liner in the tank is not easy to disassemble and replace, resulting in unsatisfactory use effect. Utility Model Content

[0005] The utility model aims to solve the above problems and provide an expansion tank with good sealing performance and an internal liner that is easy to disassemble and replace.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: an expansion tank, including an expansion tank body, a rubber water bag is arranged in the expansion tank body, the port of the rubber water bag extends to the top of the expansion tank body, the top of the expansion tank body is provided with a faucet flange and a flange seat, the rubber water bag takes in and out water through the faucet flange, and the bottom of the expansion tank body is provided with an air injection and pressurization mechanism.

[0007] Preferably, the expansion tank body comprises an upper tank body and a lower tank body, the upper tank body and the lower tank body are connected by welding, the faucet flange and the flange seat are arranged on the top of the upper tank body, and the faucet flange is connected to the rubber water bag through the flange seat.

[0008] Preferably, the port of the rubber water bag is pressed and fixed by a flange seat.

[0009] Preferably, a closing step is provided below the upper tank body, and the upper tank body is inserted into the lower tank body through the closing step.

[0010] Preferably, the gas injection and pressurizing mechanism includes an air inlet and a valve core, the bottom of the lower tank body is provided with an upward depression, the air inlet is arranged inside the depression, and the valve core blocks the air inlet under normal conditions.

[0011] Preferably, the valve core and the air inlet are detachably connected via threads.

[0012] Preferably, a rubber sealing ring is provided at the port of the air inlet, and the valve core squeezes the rubber sealing ring after being matched with the air inlet.

[0013] The utility model discloses an expansion tank, comprising an expansion tank body, wherein a rubber water bag is arranged in the expansion tank body, a port of the rubber water bag extends toward the top of the expansion tank body, a faucet flange and a flange seat are arranged on the top of the expansion tank body, water enters and exits the rubber water bag through the faucet flange, and an air injection pressurizing mechanism is arranged at the bottom of the expansion tank body; compared with the prior art, the overall structure of the expansion tank is stable, the sealing performance is good, and the internal liner is easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of an expansion tank of the utility model is shown in FIG. Figure 1 .

[0015] Figure 2 The overall structure of an expansion tank of the utility model is shown in FIG. Figure 2 .

[0016] Figure 3 The utility model is a schematic diagram of the internal structure of an expansion tank.

[0017] Figure 4 For this utility model Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0018] Figure 5 For this utility model Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0019] Figure 6 For this utility model Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0020] In the figure: 1. Expansion tank body; 2. Upper tank body; 21. Closing step; 3. Lower tank body; 31. Depression; 32. Air inlet; 33. Valve core; 34. Rubber sealing ring; 4. Water nozzle flange; 41. Flange seat; 5. Rubber water bag. DETAILED DESCRIPTION

[0021] The utility model is now described in further detail in conjunction with the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] Please refer to Figure 1-6 An expansion tank comprises an expansion tank body 1, wherein a rubber water bag 5 (i.e., an inner liner in the industry) is arranged inside the expansion tank body 1, a port of the rubber water bag 5 extends toward the top of the expansion tank body 1, a faucet flange 4 and a flange seat 41 are arranged on the top of the expansion tank body 1, water enters and exits the rubber water bag 5 through the faucet flange 4, and an air injection and pressurization mechanism is arranged at the bottom of the expansion tank body 1, and air increases the air pressure in the expansion tank body through the air injection and pressurization mechanism.

[0023] When in use, firstly, air is injected into the expansion tank body 1 from the bottom through the air injection and pressurizing mechanism, and the pressure in the expansion tank body 1 is increased; then, water is injected into the rubber water bag 5 at the faucet flange 4, and the rubber water bag 5 will be expanded after the water enters, and at the same time, the air between the rubber water bag 5 and the expansion tank body 1 (the air injected by the air injection and pressurizing mechanism) is further compressed, and the pressure in the expansion tank body 1 is further increased; when draining water, the faucet flange 4 is opened, and since the internal pressure is greater than the external pressure, the water in the rubber water bag 5 is squeezed out by the pressure, thereby realizing the water in and out of the expansion tank.

[0024] In this embodiment, the expansion tank body 1 includes an upper tank body 2 and a lower tank body 3, the upper tank body 2 and the lower tank body 3 are connected by welding, the faucet flange 4 and the flange seat 41 are arranged on the top of the upper tank body 2, and the faucet flange 4 is connected to the rubber water bag 5 through the flange seat 41.

[0025] In addition, a closing step 21 is provided at the bottom of the upper tank body 2, and the upper tank body 2 is inserted into the lower tank body 3 through the closing step 21. After the upper tank body 2 is inserted into the lower tank body 3 through the closing step 21, the outer circumference of the upper tank body 2 is flush with the outer circumference of the lower tank body 3, and the welding is performed at the joint between the upper tank body 2 and the lower tank body 3, and circumferential seam welding is performed at the joint to achieve welding fixation and sealing at the same time, thereby preventing the internal high-pressure air from leaking out and ensuring the overall quality of the expansion tank.

[0026] In the solution of the utility model, the port of the rubber water bag 5 is pressed and fixed by the flange seat 41. Since the water bag is made of rubber, it has elasticity and expansion properties. After the flange seat 41 presses and deforms the port of the rubber water bag 5, it plays a fixing role and avoids air leakage.

[0027] If the rubber water bag 5 (liner) is damaged, it is also convenient to replace it. When replacing the rubber water bag 5, the flange seat 41 can be disassembled to take out the rubber water bag 5, which is easy to operate.

[0028] Specifically, the gas injection and pressurizing mechanism includes an air inlet 32 ​​and a valve core 33 . An upward depression 31 is provided at the bottom of the lower tank body 3 . The air inlet 32 ​​is provided inside the depression 31 . Under normal circumstances, the valve core 33 blocks the air inlet 32 ​​.

[0029] When used for gas injection and pressurization, it is connected to the air inlet 32 ​​through a pipeline. At this time, air enters the expansion tank body 1 (between the expansion tank body 1 and the rubber water bag 5) through the pipeline and the air inlet 32. After the gas injection and pressurization is completed, the air inlet 32 ​​is blocked by the valve core 33 to prevent air leakage, thereby increasing the air pressure in the tank.

[0030] As a preferred solution, the valve core 33 and the air inlet 32 ​​are detachably connected via threads, a rubber sealing ring 34 is provided at the port of the air inlet 32, and the valve core 33 and the air inlet 32 ​​are matched to squeeze the rubber sealing ring 34 to achieve sealing.

[0031] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An expansion tank, comprising an expansion tank body, characterized in that: A rubber water bag is arranged in the expansion tank body, and a port of the rubber water bag extends to the top of the expansion tank body. A faucet flange and a flange seat are arranged on the top of the expansion tank body. Water enters and exits the rubber water bag through the faucet flange. An air injection and pressurization mechanism is arranged at the bottom of the expansion tank body.

2. The expansion tank according to claim 1, characterized in that: The expansion tank body comprises an upper tank body and a lower tank body, the upper tank body and the lower tank body are connected by welding, the faucet flange and the flange seat are arranged on the top of the upper tank body, and the faucet flange is connected with the rubber water bag through the flange seat.

3. The expansion tank according to claim 2, characterized in that: The port of the rubber water bag is pressed and fixed by a flange seat.

4. The expansion tank according to claim 2 or 3, characterized in that: A closing step is provided below the upper tank body, and the upper tank body is inserted into the lower tank body through the closing step.

5. The expansion tank according to claim 3, characterized in that: The gas injection and pressurizing mechanism comprises an air inlet and a valve core. The bottom of the lower tank body is provided with an upward depression. The air inlet is arranged inside the depression. Under normal circumstances, the valve core blocks the air inlet.

6. The expansion tank according to claim 5, characterized in that: The valve core is detachably connected to the air inlet via threads.

7. The expansion tank according to claim 6, characterized in that A rubber sealing ring is arranged at the port of the air inlet, and the rubber sealing ring is squeezed after the valve core is matched with the air inlet.

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