CN2734842Y - Current stabilizing device for secondary pressure water-supplying system - Google Patents

Abstract

The flow stabilization device in the secondary pressurized water supply system belongs to the field of water supply equipment, and mainly solves the impact of "water hammer" on the secondary water supply system caused by the sudden stop of the booster pump or other reasons in the secondary pressurized water supply system, and Buffering, pressure stabilization, and flow stabilization of the secondary pressurized water supply system; it is characterized in that: the automatic intake and exhaust valve (2) installed on the top of the water storage tank (1) is equipped with a vertical exhaust communication pipe (3 ), or the automatic intake and exhaust valve (2) is contained in the middle part of the water storage tank (1), and is connected with the water storage tank (1) through an elbow (4). It is mainly used in the secondary pressurized water supply system when high-rise buildings use water or users in low water pressure areas use water. It can effectively absorb or eliminate the impact of "water hammer", ensuring the safety of the secondary pressurized water supply system and acting as a buffer. The function of steady voltage and steady flow.

Description

Stabilizing device in secondary pressurized water supply system

technical field

The utility model belongs to the field of water supply equipment and relates to a flow stabilizing device in a secondary pressurized water supply system.

Background technique

The water supply pressure of the urban water supply pipe network is generally low. In order to ensure water supply for high-rise buildings and users in low water pressure areas, special water supply equipment is generally installed for secondary pressurized water supply. In the prior art, a flow stabilization device for a secondary pressurized water supply system that directly draws water from the primary water supply network is: a closed water storage tank, its water inlet is connected to the primary water supply network, and its water outlet is connected to a booster pump An automatic air intake and exhaust valve is installed on the top of the water storage tank, and the communication port of the automatic air intake and exhaust valve is installed at the highest position of the tank body and communicated with the water storage tank. The automatic intake and exhaust valve has two functions: one is: when the water storage tank is full of water, once the water supply is insufficient and the liquid level drops, and when negative pressure is formed in the tank, the automatic intake and exhaust valve will automatically open, The air outside the tank will automatically enter the tank to prevent the negative pressure of the water supply system from causing damage to the water supply system. The second is; when filling water into an empty water storage tank or when the water in the water storage tank is not full and continues to enter water, as the water level in the tank rises, the air in the tank will be automatically discharged out of the tank through the automatic intake and exhaust valve until When the water level rises and enters the automatic intake and exhaust valve through the communication port, the automatic intake and exhaust valve is automatically closed to prevent water from overflowing to the outside of the tank and to ensure that the water in the tank continues to be pressurized. Afterwards, the primary water supply network continues to fill the tank until the pressures balance each other. When the secondary pressurized water supply system is running, the water storage tank is full of water and maintains a certain pressure. There is no buffer space in the water storage tank. Due to the incompressibility of water, the current stabilizing device cannot eliminate The impact of the "water hammer" caused by the sudden stop of the booster pump or other reasons on the secondary pressurized water supply system cannot buffer, stabilize the pressure, and stabilize the flow. "Water hammer" has a great impact and destructive effect, directly affecting the stability and safety of the secondary pressurized water supply system and the water supply pipe network; therefore, the installation of the automatic intake and exhaust valve on the water storage tank in the prior art is unreasonable , so that the flow stabilizing device cannot eliminate the "water hammer" impact generated by the secondary pressurized water supply system, and it is also difficult to buffer, stabilize the pressure and stabilize the flow of the secondary pressurized water supply system.

Contents of the invention

Technical problem to be solved: Provide a flow stabilization device in the secondary pressurized water supply system, mainly to solve the "water hammer" caused by the sudden stop of the booster pump or other reasons in the secondary pressurized water supply system. The impact of the water supply system, as well as the buffering, pressure stabilization and flow stabilization of the secondary pressurized water supply system; its structure is simple, the effect is obvious, the cost is low, and it is easy to implement.

The technical solution adopted:

The flow stabilization device in the secondary pressurized water supply system has a water storage tank, an automatic intake and exhaust valve, a booster pump and corresponding pipe fittings, and is characterized in that: the automatic intake and exhaust valve installed on the top of the water storage tank There is a vertical exhaust connecting pipe, or an automatic air intake and exhaust valve is installed in the middle of the water storage tank, and is connected with the water storage tank through an elbow.

Beneficial effects: when water is injected into the water storage tank, the upper part of the tank automatically forms a closed tank that is in balance with the water pressure of the primary water supply pipe network, and can be automatically maintained during the operation of the secondary pressurized water supply system. Compressed air space 6: Since the volume of air has the characteristic of compressing or expanding with the change of pressure, when the pressure in the water storage tank changes slightly, the amount of water will change greatly, and its beneficial effect; ①. The closed compressed air space formed in the upper part of the water tank can absorb and eliminate the "water hammer" impact caused by the sudden stop of the booster pump and other reasons in the secondary pressurized water supply system. The phenomenon of unstable pressure in the water supply pipe network plays a role in stabilizing the pressure and flow. ③ When the water output is greater than the inflow, the liquid level in the water storage tank decreases with the pressure drop of the primary water supply network, which can be fully utilized The water storage capacity of the water storage tank, ④, when the pressure in the water storage tank continues to drop and the water level drops to the highest water level line H where the water pressure and atmospheric pressure are balanced, the automatic intake and exhaust valve will automatically open, so that the air outside the tank will automatically enter the tank , to ensure that the water supply system will not generate negative pressure and cause damage to the water supply system; its structure is simple, the effect is obvious, the cost is low, and it is easy to implement.

Description of drawings

Fig. 1. Schematic diagram of the structure when the automatic intake and exhaust valve 2 is mounted on the topmost position of the water storage tank 1;

Fig. 2. Schematic diagram of the structure when the automatic intake and exhaust valve 2 is installed in the middle of the water storage tank 1;

Detailed ways

Example: in the figure 1-water storage tank, 2-automatic intake and exhaust valve, 3-exhaust connecting pipe, 4-elbow, 5-water, 6-compressed air space, 7-water inlet, 8-water outlet, 9-booster pump, H ₀ -effective overall height of water storage tank 1, H ₁ -distance between the highest water level and the lowest point of water storage tank 1 when the water pressure in water storage tank 1 is balanced with atmospheric pressure, H ₂ =H ₀ -H ₁ , V ₀ - the volume occupied by the H ₂ part of the water storage tank, V ₁ - the effective air under the atmospheric pressure state with the volume V ₀ being compressed by the primary water supply and balanced with the pressure of the primary water supply pipe network Volume, P-pressure switch controller, arrows indicate the direction of water flow.

As shown in Figure 1, it is a modification of the existing flow stabilization device. The automatic intake and exhaust valve 2 is installed at the top of the water storage tank 1, and communicates with the water storage tank 1 through the exhaust communication pipe 3, and the exhaust communication The bottom port of the pipe 3 is at a distance of _H1 from the lowest point of the water storage tank ₁ , and at a distance of _H2 from the highest point of the water storage tank 1; The highest water level when water 5 is in equilibrium with atmospheric pressure.

As shown in Figure 2, the automatic intake and exhaust valve 2 is installed in the middle of the water storage tank 1, and communicates with the water storage tank 1 through the elbow 4, and the interface between the elbow 4 and the water storage tank 1 is connected to the water storage tank 1. The lowest point is H ₁ away from the highest point of the water storage tank 1 and H ₂ is the distance. The height H ₁ of the interface is the highest water level when the water in the water storage tank 1 is balanced with the atmospheric pressure.

The top of the so-called water storage tank refers to: the corresponding position of the highest point of the inner space of the water storage tank; the lowest point of the so-called water storage tank refers to: the lowest point of the inner space of the water storage tank.

Under the guarantee of a moderate _H1 , the air under the full atmospheric pressure in the entire volume _V0 occupied by the _H2 part, when compressed by the primary water supply 5 injected into the storage tank 1 and finally balanced with the pressure of the primary water supply pipe network, Its compressed effective volume _V1 should coordinate with the adjustable water volume of the secondary pressurized water supply system.

Operating principle: As the water level in the water storage tank 1 rises, the air in the tank will be automatically discharged out of the tank through the automatic intake and exhaust valve 2 until the water level reaches H ₁ , and the water will continue to be injected inward, and the water level will enter the exhaust connecting pipe 3 The bottom port (or the interface of the elbow 4 and the water storage tank 1) and as the water pressure rises the water level rises in the exhaust communication pipe 3 (or rises in the elbow 4), and the exhaust communication pipe 3 (or The air in the elbow 4) is discharged out of the tank through the automatic intake and exhaust valve until the automatic intake and exhaust valve 2 is automatically closed. And the rise of the water level outside the exhaust connecting pipe 3 (or above the interface of the elbow 4 and the water storage tank 1) will compress the corresponding air in the water storage tank 1 until the pressure of the compressed air and the primary water supply pipe network is balanced. Form the compressed air space 6 that has V ₀ at the top of water storage tank 1; The water inlet 7 is continuously replenished. Once the pressure in the water storage tank 1 drops to the set pressure, the pressure switch controller P sends a stop signal, and the booster pump 9 stops running. Change and compression or expansion characteristics, at this time, the compressed air space 6 can effectively absorb and eliminate the "water hammer" impact caused by the sudden stop of the booster pump 9 or other reasons. Due to the compressibility of air, when the pressure in the water storage tank changes slightly, the water volume will change greatly. The compressed air space 6 can effectively relieve the water flow caused by the pressure fluctuation of the water in the primary water supply network. Instability, so as to buffer and stabilize the pressure and flow of the secondary water supply system.

Claims (2)

1. The flow stabilization device in the secondary pressurized water supply system has a water storage tank (1), an automatic intake and exhaust valve (2), a booster pump (9) and corresponding pipe fittings, and is characterized in that it is installed in the water storage tank The automatic air intake and exhaust valve (2) at the top of the tank (1) is equipped with a vertical exhaust connecting pipe (3), or the automatic air intake and exhaust valve (2) is installed in the middle of the water storage tank (1), and Connect with the water storage tank (1) through the elbow (4). 2. The flow stabilizing device in the secondary pressurized water supply system according to claim 1, characterized in that the bottom port of the exhaust communication pipe (3) is at a distance of H ₁ from the lowest point of the water storage tank (1), and The distance between the highest point of the water storage tank (1) is H ₂ , or the distance between the elbow (4) and the water storage tank (1) is H ₁ from the lowest point of the water storage tank (1), and the distance between the water storage tank (1) The highest point is _H2 apart.

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