Water supply system with pressure expansion tank

Abstract

The utility model relates to a water supply system with a pressure expansion tank. The device comprises a water supply pipeline which is connected with a pressure expansion tank through a branch pipe; the device is characterized in that the branch pipe in front of the pressure expansion tank is connected in series with a temperature buffer tank; and the volume of the temperature buffer tank is the same as that of the pressure expansion tank. By arranging the temperature buffer tank, high-temperature water of the system only influences the temperature buffer tank and does not influence the pressure buffer tank (especially an air bag of the pressure buffer tank), so that the whole constant pressure system of the pressure expansion tank is always in a normal working state according to the process principle.

Description

Technical Field

[0001] The utility model relates to a water supply system, in particular to a water supply system with a pressure expansion tank. Background Art

[0002] In the prior art, there is a water supply system with a pressure expansion tank. It is mainly connected to a pressure expansion tank through a branch pipe on the water supply pipeline. The structure of the pressure expansion tank is consistent with that disclosed by the applicant in CN203034535U. An air bag is arranged inside the pressure expansion tank, and pre-filled gas is filled between the outside of the air bag and the inner wall of the tank body of the pressure expansion tank. When pressurized water in the water supply pipeline of the system enters the air bag of the pressure expansion tank, the pre-filled gas is compressed. According to Boyle's gas law, the volume of the gas decreases and the pressure increases after being compressed, until the gas pressure in the pressure expansion tank reaches the same pressure as the water pressure, and the water intake stops. When the pressure drops after the water in the pressure expansion tank is lost, the gas pressure in the pressure expansion tank is greater than the water pressure. At this time, the gas volume expands and squeezes the water out of the pressure expansion tank to replenish it in the water supply pipeline, until the gas pressure in the pressure expansion tank reaches the same pressure as the water pressure again, and the drainage stops. The above cycle process is the constant pressure water replenishment process of the pressure expansion tank.

[0003] Since the maximum operating temperature range of the airbag in the pressure expansion tank is 70°C, when the system temperature exceeds 70°C to 99°C, the normal use of the pressure expansion tank will be affected because the maximum operating temperature of the airbag is only 70°C. Utility Model Content

[0004] The purpose of the utility model is to provide a water supply system with a pressure expansion tank, which mainly solves the problems existing in the above-mentioned prior art. By setting a temperature buffer tank, the high-temperature water of the system will only affect the temperature buffer tank but not the pressure buffer tank (especially its air bag). Therefore, this process principle makes the entire pressure expansion tank constant pressure system always in a normal working state.

[0005] The specific technical solution of the utility model is as follows:

[0006] A water supply system with a pressure expansion tank comprises a water supply pipeline, and a pressure expansion tank is connected to the water supply pipeline through a branch pipe; the characteristic is that a temperature buffer tank is connected in series to the branch pipe in front of the pressure expansion tank; the volume of the temperature buffer tank is the same as that of the pressure expansion tank.

[0007] The water supply system with a pressure expansion tank is characterized in that: the temperature buffer tank includes a tank body with a cavity composed of an upper head and a lower head; the bottom of the tank body has a support; the upper head is provided with a water inlet flange, which is connected to a branch pipe close to the water supply pipeline through the water inlet flange; the lower head is provided with a water outlet flange, which is connected to a branch pipe close to the pressure expansion tank through the water outlet flange.

[0008] The water supply system with a pressure expansion tank is characterized in that an air bag is arranged inside the pressure expansion tank, and the space between the outside of the air bag and the inner wall of the tank body of the pressure expansion tank is filled with pre-filled gas.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] Through the structure of the utility model, a temperature buffer tank is set, so that the high-temperature water of the system will only affect the temperature buffer tank, but will not affect the pressure buffer tank (especially its air bag). Therefore, this process principle ensures that the entire pressure expansion tank constant pressure system is always in a normal working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a structural schematic diagram of the temperature buffer tank in the utility model. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0014] See also Figure 1 , 2 The utility model discloses a water supply system with a pressure expansion tank. As shown in the figure, it includes a water supply pipeline 1, and a pressure expansion tank 2 is connected to the water supply pipeline 1 through a branch pipe; the characteristic is that a temperature buffer tank 3 is connected in series to the branch pipe in front of the pressure expansion tank 2; the volume of the temperature buffer tank 3 is the same as that of the pressure expansion tank 2.

[0015] In the utility model, the temperature buffer tank 3 includes a tank body with a cavity 30 composed of an upper head 31 and a lower head 32; the bottom of the tank body has a support 33; the upper head 31 is provided with a water inlet flange 311, which is connected to a branch pipe close to the water supply pipeline 1 through the water inlet flange 311; the lower head 32 is provided with a water outlet flange 321, which is connected to a branch pipe close to the pressure expansion tank 2 through the water outlet flange 321.

[0016] In the utility model, an air bag 21 is arranged inside the pressure expansion tank 2, and the space between the outside of the air bag 21 and the inner wall of the tank body of the pressure expansion tank 2 is filled with pre-filled gas.

[0017] The temperature buffer tank 3 of the utility model is installed in series at the front end of the pressure expansion tank 2, which can effectively protect the normal use of the pressure expansion tank 2. The specific principle and function are described as follows: a temperature buffer tank 3 of the same volume is installed in series at the front end of the pressure expansion tank 2. At this time, the temperature buffer tank 3 is equivalent to expanding the capacity of a pressure expansion tank 2 without the air bag 21. In the early stage of system operation, the system water is at a normal temperature stage. When the system pipeline gradually rises with the temperature, the pressure also gradually increases. The system water gradually flows through the temperature buffer tank 3 to the pressure expansion tank 2. The increase in the system water temperature is a preliminary process. According to Boyle's gas law, this part of the relatively low-temperature system water is stored in the pressure expansion tank 2. Finally, the pressure expansion tank 2 reaches the maximum full load. At this time, the high-temperature system water in the later stage enters the temperature buffer tank 3, and finally stops the water intake until the gas pressure in the pressure expansion tank 2 is consistent with the water pressure. When the pressure decreases after the water is lost, the gas pressure in the pressure expansion tank 2 is greater than the water pressure. At this time, the air volume expands, forcing the air bag 21 to squeeze the water in the temperature buffer tank 3 into the system until the air gas pressure and the water pressure are consistent again. In the above cycle, the water in the pressure expansion tank 2 is relatively static in the later cycle, and the water in the temperature buffer tank 3 is in a dynamic process, which means that the high-temperature water in the system will only affect the temperature buffer tank 3. This process principle makes the entire pressure expansion tank 2 constant pressure system always in normal working condition.

[0018] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water supply system with a pressure expansion tank, comprising a water supply pipeline (1), the water supply pipeline (1) being connected to a pressure expansion tank (2) via a branch pipe; characterized in that: A temperature buffer tank (3) is connected in series to the branch pipe in front of the pressure expansion tank (2); the volume of the temperature buffer tank (3) is the same as that of the pressure expansion tank (2); an air bag (21) is provided inside the pressure expansion tank (2), and the space between the outside of the air bag (21) and the inner wall of the tank body of the pressure expansion tank (2) is filled with pre-charged gas.

2. The water supply system with a pressure expansion tank according to claim 1, characterized in that: The temperature buffer tank (3) comprises a tank body having a cavity (30) formed by an upper sealing head (31) and a lower sealing head (32); the bottom of the tank body has a support (33); the upper sealing head (31) is provided with a water inlet flange (311), and is connected to a branch pipe close to a water supply pipeline (1) through the water inlet flange (311); the lower sealing head (32) is provided with a water outlet flange (321), and is connected to a branch pipe close to a pressure expansion tank (2) through the water outlet flange (321).

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