A bladder pressure tank with pressure stabilizing structure

Abstract

The utility model discloses a kind of bladder pressure tank with pressure stabilizing structure, belong to pressure tank field, including tank body, the tank body inside is provided with elastic air bag, the elastic air bag will tank body interior space be divided into the air cavity located at the outside of elastic air bag and the liquid cavity located at the inside of elastic air bag, the tank body top is provided with air intake assembly, the air intake assembly is communicated with air cavity, for filling compressed gas to air cavity interior, the tank body outer wall bottom is provided with liquid inlet assembly, the liquid inlet assembly is communicated with liquid cavity, for realizing the flow between external medium and liquid cavity, pressure gauge is provided on the tank body, the tank body side is provided with pressure stabilizing assembly, the utility model is by setting the pressure stabilizing assembly consisting of pressure sensor, electromagnetic regulating valve, controller and auxiliary gas tank, can quickly adapt liquid cavity pressure change, effectively improve the pressure stabilizing precision of pressure tank, solve the problem that existing pressure tank pressure stabilizing precision is low, response is slow.

Description

Technical Field

[0001] This utility model relates to the field of pressure tank technology, and in particular to a bladder-type pressure tank with a pressure stabilizing structure. Background Technology

[0002] A bladder-type pressure tank is an energy storage device commonly used in water supply, heating, and fire protection systems. It contains an elastic bladder that divides the tank's interior into an air chamber and a water chamber (or other media chamber). By pre-filling the air chamber with compressed gas, when the system's media pressure increases, the media enters the water chamber and compresses the bladder, causing the air chamber volume to decrease and the pressure to increase. When the system pressure decreases, the compressed gas in the air chamber expands, compressing the bladder and forcing the media out of the water chamber, thus stabilizing system pressure and balancing flow.

[0003] However, in actual use, the pressure stabilization effect of existing bladder pressure tanks mainly depends on the initial pre-fill pressure of the air chamber and the elastic deformation capability of the bladder. When the system medium pressure fluctuates significantly or frequently, the air chamber pressure response is slow and it is difficult to quickly adapt to system pressure changes, resulting in low pressure stabilization accuracy and easy system pressure instability, which affects the normal operation of the equipment. Utility Model Content

[0004] The purpose of this invention is to solve the problems of low pressure stabilization accuracy and slow response of existing bladder-type pressure tanks, and to propose a bladder-type pressure tank with a pressure stabilization structure.

[0005] To achieve the above objectives, this utility model employs the following technology: a bladder-type pressure tank with a pressure-stabilizing structure, comprising a tank body, wherein an elastic air bladder is disposed inside the tank body, the elastic air bladder dividing the internal space of the tank body into an air cavity located outside the elastic air bladder and a liquid cavity located inside the elastic air bladder, an air inlet assembly disposed at the top of the tank body, the air inlet assembly communicating with the air cavity for filling the air cavity with compressed gas, a liquid inlet assembly disposed at the bottom of the outer wall of the tank body, the liquid inlet assembly communicating with the liquid cavity for realizing the flow between the external medium and the liquid cavity, a pressure gauge disposed on the tank body, and a pressure-stabilizing assembly disposed on one side of the tank body.

[0006] As a further description of the above technical solution: the pressure stabilizing component includes a pressure sensor, an electromagnetic regulating valve, a controller, and an auxiliary gas tank. The pressure sensor is installed on the liquid inlet assembly and is used to detect the pressure value of the medium in the liquid chamber in real time. One end of the electromagnetic regulating valve is connected to the gas chamber through a second connecting pipe, and the other end is connected to the auxiliary gas tank through a first connecting pipe. The controller is installed on the tank body, and a display screen is provided on the front of the controller. The display screen is electrically connected to the controller, and the controller is electrically connected to the pressure sensor and the electromagnetic regulating valve respectively.

[0007] As a further description of the above technical solution: the auxiliary gas tank is pre-filled with compressed gas, and the rated pressure of the auxiliary gas tank is adapted to the initial pre-filling pressure of the gas chamber.

[0008] As a further description of the above technical solution: the air intake assembly includes an air intake pipe and a one-way valve. One end of the air intake pipe passes through the top of the tank and communicates with the air chamber, and the one-way valve is installed on the air intake pipe.

[0009] As a further description of the above technical solution: the liquid inlet assembly includes an inlet pipe, an outlet pipe, and a shut-off valve. One end of the inlet pipe and the outlet pipe both penetrate the side wall of the tank and communicate with the liquid chamber. The shut-off valve is installed on the inlet pipe and the outlet pipe respectively to control the opening and closing of the inlet pipe and the outlet pipe. The pressure sensor is installed on the inlet pipe.

[0010] As a further description of the above technical solution: the top of the auxiliary gas tank is provided with a pressure regulating valve, which is connected to the inside of the auxiliary gas tank and is used to regulate the pre-charge pressure inside the auxiliary gas tank.

[0011] As a further description of the above technical solution: the elastic airbag is made of nitrile rubber, a vent valve is provided at the top of the tank, and a support leg is provided at the bottom of the tank.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This invention employs a pressure-stabilizing assembly consisting of a pressure sensor, an electromagnetic regulating valve, a controller, and an auxiliary gas tank. The pressure sensor detects real-time pressure changes in the liquid chamber and transmits the signal to the controller. When the liquid chamber pressure exceeds a preset upper threshold, the controller opens the electromagnetic regulating valve, allowing some gas from the chamber to enter the auxiliary gas tank, reducing the chamber pressure and thus minimizing pressure exertion on the elastic bladder, preventing a continuous increase in liquid chamber pressure. Conversely, when the liquid chamber pressure falls below a preset lower threshold, the controller opens the electromagnetic regulating valve, allowing gas from the auxiliary gas tank to enter the chamber, increasing the chamber pressure and further intensifying pressure exertion on the elastic bladder. This pushes the liquid chamber medium outward, increasing the overall pressure. The entire pressure-stabilizing process is fast-responding and adapts quickly to changes in liquid chamber pressure, effectively improving the pressure stabilization accuracy of the pressure tank. This solves the problems of low pressure stabilization accuracy and slow response in existing pressure tanks, enhancing the device's practicality. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown; Figure 2 A schematic diagram of a tank according to an embodiment of the present invention is shown; Figure 3A schematic diagram of the internal cross-section of the tank according to an embodiment of the present invention is shown; Figure 4 It shows Figure 3 Enlarged view of point A in the middle; Figure 5 It shows Figure 3 Enlarged view of point B in the middle.

[0014] Legend: 1. Tank body; 2. Elastic airbag; 3. Air inlet assembly; 31. Air inlet pipe; 32. One-way valve; 4. Liquid inlet assembly; 41. Liquid inlet pipe; 42. Liquid outlet pipe; 43. Shut-off valve; 5. Auxiliary air tank; 6. Pressure gauge; 7. Controller; 8. Display screen; 9. First connecting pipe; 10. Electromagnetic regulating valve; 11. Second connecting pipe; 12. Pressure regulating valve; 13. Pressure sensor; 14. Air chamber; 15. Liquid chamber; 16. Vent valve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-5 This embodiment provides a bladder-type pressure tank with a pressure-stabilizing structure, including a tank body 1. An elastic air bladder 2 is disposed inside the tank body 1. The elastic air bladder 2 divides the internal space of the tank body 1 into an air chamber 14 located outside the elastic air bladder 2 and a liquid chamber 15 located inside the elastic air bladder 2. An air inlet assembly 3 is disposed at the top of the tank body 1. The air inlet assembly 3 is connected to the air chamber 14 and is used to fill the air chamber 14 with compressed gas. A liquid inlet assembly 4 is disposed at the bottom of the outer wall of the tank body 1. The liquid inlet assembly 4 is connected to the liquid chamber 15 and is used to realize the flow between the external medium and the liquid chamber 15. A pressure gauge 6 is disposed on the tank body 1, and a pressure stabilizing assembly is disposed on one side of the tank body 1. The pressure stabilizing component includes a pressure sensor 13, an electromagnetic regulating valve 10, a controller 7, and an auxiliary gas tank 5. The pressure sensor 13 is installed on the liquid inlet assembly 4 and is used to detect the pressure value of the medium in the liquid chamber 15 in real time. One end of the electromagnetic regulating valve 10 is connected to the gas chamber 14 through the second connecting pipe 11, and the other end is connected to the auxiliary gas tank 5 through the first connecting pipe 9. The controller 7 is installed on the tank body 1, and a display screen 8 is provided on the front of the controller 7. The display screen 8 is electrically connected to the controller 7. The controller 7 is electrically connected to the pressure sensor 13 and the electromagnetic regulating valve 10 respectively. The auxiliary gas tank 5 is pre-filled with compressed gas, and the rated pressure of the auxiliary gas tank 5 is adapted to the initial pre-filling pressure of the gas chamber 14.

[0017] Specifically, in use, firstly, compressed gas at a preset pressure is injected into the air chamber 14 through the air intake pipe 31 of the air intake assembly 3. Simultaneously, the pressure inside the auxiliary air tank 5 is adjusted to a value that matches the initial pressure of the air chamber 14 through the pressure regulating valve 12 of the auxiliary air tank 5. Then, the shut-off valve 43 of the liquid inlet assembly 4 is opened, and the medium in the external system enters the liquid chamber 15 through the liquid inlet pipe 41. When the pressure in the liquid chamber 15 increases, the elastic airbag 2 compresses the space of the air chamber 14, causing the volume of the air chamber 14 to shrink and the pressure to increase. At this time, the pressure sensor 13 transmits the detected pressure signal of the liquid chamber 15 to the controller 7, where the controller 7 is a PLC. If the pressure in the liquid chamber 15 is higher than the preset upper limit threshold, the controller 7 controls the electromagnetic regulating valve 10 to open, and part of the gas in the air chamber 14 enters the auxiliary air chamber. When the pressure in the air chamber 14 of tank 5 decreases, the squeezing force of the elastic airbag 2 on the liquid chamber 15 decreases, and the pressure in the liquid chamber 15 decreases accordingly. When the external system pressure decreases, the medium in the liquid chamber 15 is discharged through the liquid outlet pipe 42, and the pressure in the liquid chamber 15 decreases. The compressed gas in the air chamber 14 expands. If the pressure in the liquid chamber 15 is lower than the preset lower limit threshold, the controller 7 controls the electromagnetic regulating valve 10 to open, and the gas in the auxiliary air tank 5 enters the air chamber 14, increasing the pressure in the air chamber 14. This further squeezes the elastic airbag 2, pushing the medium in the liquid chamber 15 to be discharged, increasing the pressure in the liquid chamber 15, thereby achieving the purpose of stabilizing the pressure in the liquid chamber 15. The entire pressure stabilization process has a fast response speed and can quickly adapt to changes in the pressure in the liquid chamber 15, effectively improving the pressure stabilization accuracy of the pressure tank and solving the problems of low pressure stabilization accuracy and slow response of existing pressure tanks.

[0018] Furthermore, the air intake assembly 3 includes an air intake pipe 31 and a one-way valve 32. One end of the air intake pipe 31 passes through the top of the tank and communicates with the air chamber 14, and the one-way valve 32 is installed on the air intake pipe 31.

[0019] Specifically, the one-way valve 32 is directed from the outside to the inside of the air chamber 14. The one-way valve 32 prevents the compressed gas in the air chamber 14 from leaking in the reverse direction through the air inlet pipe 31, thus ensuring the stability of the pressure in the air chamber 14.

[0020] Furthermore, the liquid inlet assembly 4 includes an inlet pipe 41, an outlet pipe 42, and a shut-off valve 43. One end of the inlet pipe 41 and the outlet pipe 42 both penetrate the side wall of the tank body 1 and are connected to the liquid chamber 15. The shut-off valve 43 is installed on the inlet pipe 41 and the outlet pipe 42 respectively to control the opening and closing of the inlet pipe 41 and the outlet pipe 42. The pressure sensor 13 is installed on the inlet pipe 41.

[0021] Specifically, the shut-off valve 43 is used to control the opening and closing of the inlet pipe 41 and the outlet pipe 42. When the tank 1 is under maintenance or out of use, the shut-off valve 43 can cut off the connection between the liquid chamber 15 and the external system, thereby improving operational safety.

[0022] Furthermore, the top of the auxiliary gas tank 5 is provided with a pressure regulating valve 12, which is connected to the inside of the auxiliary gas tank 5 and is used to regulate the pre-charge pressure inside the auxiliary gas tank 5.

[0023] Specifically, the connection end of the pressure regulating valve 12 is threaded to the pressure regulating interface on the top of the auxiliary gas tank 5, and is used to connect to external gas filling equipment, such as an air compressor or nitrogen cylinder, to fill the auxiliary gas tank 5 with compressed gas. It is only used during initial filling or pressure replenishment. The pressure relief end of the pressure regulating valve 12 is equipped with a manual knob or valve to release excess gas in the auxiliary gas tank 5.

[0024] Furthermore, the elastic airbag 2 is made of nitrile rubber, a vent valve 16 is provided at the top of the tank 1, and a support leg is provided at the bottom of the tank 1.

[0025] Specifically, the support legs can provide stable support for the tank 1 and prevent the tank 1 from tipping over during use. Nitrile rubber has good elasticity, oil resistance and aging resistance, which can extend the service life of the elastic airbag 2.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bladder-type pressure tank with a pressure-stabilizing structure, characterized in that, The container includes a tank (1), inside which is an elastic air bladder (2). The elastic air bladder (2) divides the internal space of the tank (1) into an air chamber (14) located outside the elastic air bladder (2) and a liquid chamber (15) located inside the elastic air bladder (2). An air inlet assembly (3) is provided on the top of the tank (1). The air inlet assembly (3) is connected to the air chamber (14) and is used to fill the air chamber (14) with compressed gas. A liquid inlet assembly (4) is provided at the bottom of the outer wall of the tank (1). The liquid inlet assembly (4) is connected to the liquid chamber (15) and is used to realize the flow between the external medium and the liquid chamber (15). A pressure gauge (6) is provided on the tank (1), and a pressure stabilizing assembly is provided on one side of the tank (1).

2. A bladder-type pressure tank with a pressure-stabilizing structure according to claim 1, characterized in that, The pressure stabilizing assembly includes a pressure sensor (13), an electromagnetic regulating valve (10), a controller (7), and an auxiliary gas tank (5). The pressure sensor (13) is installed on the liquid inlet assembly (4) and is used to detect the pressure value of the medium in the liquid chamber (15) in real time. One end of the electromagnetic regulating valve (10) is connected to the gas chamber (14) through the second connecting pipe (11), and the other end is connected to the auxiliary gas tank (5) through the first connecting pipe (9). The controller (7) is installed on the tank body (1). The front of the controller (7) is provided with a display screen (8). The display screen (8) is electrically connected to the controller (7). The controller (7) is electrically connected to the pressure sensor (13) and the electromagnetic regulating valve (10) respectively.

3. A bladder-type pressure tank with a pressure-stabilizing structure according to claim 2, characterized in that, The auxiliary gas tank (5) is pre-filled with compressed gas, and the rated pressure of the auxiliary gas tank (5) is compatible with the initial pre-filling pressure of the gas chamber (14).

4. A bladder-type pressure tank with a pressure-stabilizing structure according to claim 1, characterized in that, The air intake assembly (3) includes an air intake pipe (31) and a one-way valve (32). One end of the air intake pipe (31) passes through the top of the tank and communicates with the air chamber (14). The one-way valve (32) is installed on the air intake pipe (31).

5. A bladder-type pressure tank with a pressure-stabilizing structure according to claim 2, characterized in that, The liquid inlet assembly (4) includes an inlet pipe (41), an outlet pipe (42), and a shut-off valve (43). One end of the inlet pipe (41) and the outlet pipe (42) both penetrate the side wall of the tank body (1) and are connected to the liquid chamber (15). The shut-off valve (43) is installed on the inlet pipe (41) and the outlet pipe (42) respectively to control the opening and closing of the inlet pipe (41) and the outlet pipe (42). The pressure sensor (13) is installed on the inlet pipe (41).

6. A bladder-type pressure tank with a pressure-stabilizing structure according to claim 2, characterized in that, The top of the auxiliary gas tank (5) is provided with a pressure regulating valve (12), which is connected to the inside of the auxiliary gas tank (5) and is used to regulate the pre-charge pressure inside the auxiliary gas tank (5).

7. A bladder-type pressure tank with a pressure-stabilizing structure according to claim 1, characterized in that, The elastic airbag (2) is made of nitrile rubber, and the top of the tank (1) is provided with a vent valve (16), and the bottom of the tank (1) is provided with a support leg.

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