CN203392836U - Water chamber vacuum control tank automatic drainage device - Google Patents

Abstract

The utility model discloses an automatic drainage device of a water chamber vacuum control tank, which comprises a vacuum control tank; the vacuum control tank is connected with a U-shaped water seal pipe through a bottom interface; the height difference between the overflow port of the U-shaped water seal pipe and the bottom of the U-shaped water seal pipe is equal to the height of a water column converted by local atmospheric pressure, the height difference between the interface at the bottom of the vacuum control tank and the overflow port of the U-shaped water seal pipe is equal to the height of the water column converted by the difference between the highest operation vacuum pressure of the water chamber vacuum pump and the atmospheric pressure, and the height difference between the interface at the bottom of the vacuum control tank and the overflow port of the U-shaped water seal pipe is not less than the height difference between the overflow port of the U-shaped water seal pipe and the bottom of the U-shaped water seal; a water discharge pipe is arranged at the bottom of the U-shaped water seal pipe; an overflow port of the U-shaped water seal pipe is respectively connected with the overflow pipe and the vent pipe through a three-way pipe; one side of the U-shaped water seal pipe is connected with a water injection pipe. The utility model provides an automatic drainage device of hydroecium vacuum control jar, it can be under the vacuum condition of hydroecium vacuum control jar not influencing, to the automatic drainage of vacuum control jar.

Description

Water chamber vacuum control tank automatic drainage device

technical field

The utility model relates to an automatic drainage device for a vacuum control tank of a water chamber.

Background technique

For power plants with seawater direct-flow cooling condensers, the water chambers of the condensers are all equipped with water chamber vacuum pumps. When the power plant water chamber vacuum system is equipped with a vacuum control tank, the seawater retained in the vacuum control tank needs to be drained regularly to prevent vacuum control. The water level in the tank is too high and the vacuum system cannot pump air normally. Since the vacuum tank is in a vacuum state, directly opening the drain below the vacuum control tank will destroy the vacuum of the system.

At present, the vacuum control tank drainage system used more in the vacuum system of the water chamber of the power station is a manual drainage device, and its main disadvantages are:

① It is necessary for the operator to conduct regular inspections and manually operate the valve of the drainage system to drain the water in the vacuum control tank;

② Mistakes such as opening and closing the isolation valve in the wrong order are prone to occur during operation, which will cause vacuum damage to the vacuum pumping system of the water chamber;

③ During the drainage process, the air in the drainage tank will also leak into the vacuum system, increasing the vacuum load of the water chamber;

④ The tightness requirements of the isolation valve in the drainage system are relatively high, and the air leakage of the valve will also have an adverse effect on the vacuum maintenance of the vacuum pumping system of the water chamber.

Therefore, it is necessary to design an automatic drainage device that can more reliably ensure the tightness of the vacuum system to replace the existing manual drainage device.

Contents of the invention

The purpose of the utility model is to provide an automatic drainage device for the vacuum control tank of the water chamber, which can automatically drain the vacuum control tank without affecting the vacuum of the vacuum control tank of the water chamber.

In order to achieve the above object, the technical scheme of the utility model is to design a water chamber vacuum control tank automatic drainage device, including a vertical vacuum control tank, the top of the vacuum control tank is connected to the condenser water chamber and the water chamber vacuum pump through a pipeline; The control tank is connected to the vertical U-shaped water-sealed pipe through its bottom interface, and the opening of the U-shaped water-sealed pipe away from the bottom interface of the vacuum control tank is the U-shaped water-sealed pipe overflow port; the U-shaped water-sealed pipe overflow port is connected to the U-shaped The height difference at the bottom of the water seal tube is equal to the height of the water column converted from the local atmospheric pressure, and the height difference between the bottom interface of the vacuum control tank and the overflow port of the U-shaped water seal tube is equal to the difference between the maximum operating vacuum pressure of the water chamber vacuum pump and the atmospheric pressure. The height of the water column, and the height difference between the bottom interface of the vacuum control tank and the overflow port of the U-shaped water-sealed pipe is not less than the height difference between the overflow port of the U-shaped water-sealed pipe and the bottom of the U-shaped water-sealed pipe; The water discharge pipe is equipped with a water discharge valve; the overflow port of the U-shaped water-sealed pipe is connected to the overflow pipe and the ventilation pipe through a three-way pipe; the overflow pipe is not higher than the overflow port of the U-shaped water-sealed pipe; the ventilation pipe is vertical The opening of the ventilation pipe is higher than the overflow port of the U-shaped water seal tube and lower than the bottom interface of the vacuum control tank; the side of the U-shaped water seal tube connected to the bottom interface of the vacuum control tank is connected with a water injection pipe, and the water injection pipe is connected to the bottom of the vacuum control tank. A water injection valve is provided; the interface between the water injection pipe and the U-shaped water-sealed pipe is higher than the bottom of the U-shaped water-sealed pipe and lower than the overflow port of the U-shaped water-sealed pipe.

Preferably, the water discharge valve is a vacuum cut-off valve.

Preferably, the water injection valve is also a vacuum cut-off valve.

Preferably, both the overflow pipe and the drain pipe are connected to the drain main.

Preferably, the main drainage pipe is located below the U-shaped water seal pipe.

The utility model has the advantages and beneficial effects of providing an automatic drainage device for the vacuum control tank of the water chamber, which can automatically drain the vacuum control tank without affecting the vacuum of the vacuum control tank of the water chamber.

When the unit is initially running, open the water injection valve, fill the U-shaped water seal pipe with water through the water injection pipe, open the water discharge valve, and drain the air in the U-shaped water seal pipe until the overflow pipe overflows, then close the water discharge valve, and then close Fill valve.

After the vacuum pump of the water chamber is started, due to the suction of the vacuum, the water level on both sides of the U-shaped water-sealed pipe has a height difference. At the maximum vacuum pressure of the water chamber vacuum pump, the maximum height difference on both sides of the U-shaped water-sealed pipe is basically fixed. the

As the amount of water accumulated in the vacuum control tank increases, the water level on both sides of the U-shaped water-sealed pipe rises at the same time, and finally the water level on one side reaches the elevation of the overflow port of the U-shaped water-sealed pipe. If the mouth is higher than the maximum height difference above, if the water volume continues to increase, the excess water will be drained through the overflow pipe, thereby realizing automatic drainage of the vacuum control tank and not affecting the vacuum state of the vacuum control tank in the water chamber.

The height difference between the overflow port of the U-shaped water-sealed pipe and the bottom of the U-shaped water-sealed pipe is equal to the height of the water column converted from the local atmospheric pressure, and the height difference between the bottom interface of the vacuum control tank and the overflow port of the U-shaped water-sealed pipe is equal to the highest vacuum pump The height of the water column converted from the difference between the operating vacuum pressure and the atmospheric pressure, and the height difference between the bottom interface of the vacuum control tank and the overflow port of the U-shaped water-sealed pipe is not less than the height difference between the overflow port of the U-shaped water-sealed pipe and the bottom of the U-shaped water-sealed pipe Height difference; it can prevent air from leaking into the system under full vacuum and ensure the vacuum requirements of the system.

Description of drawings

Fig. 1 is the schematic diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.

The technical scheme of the concrete implementation of the utility model is:

As shown in Figure 1, a kind of water chamber vacuum control tank 1 automatic draining device, comprises the vertical vacuum control tank 1, and the vacuum control tank 1 top is connected condenser water chamber 2 and water chamber vacuum pump 3 by pipeline; Vacuum control tank 1 Connect the vertical U-shaped water-sealed pipe 5 through its bottom interface 4, and the opening of the U-shaped water-sealed pipe 5 away from the bottom interface 4 of the vacuum control tank is the U-shaped water-sealed pipe overflow port 6; the U-shaped water-sealed pipe overflows The height difference L1 between the port 6 and the bottom of the U-shaped water-sealed pipe 5 is equal to the water column height H ₁ converted from the local atmospheric pressure, and the height difference L2 between the bottom port 4 of the vacuum control tank and the overflow port 6 of the U-shaped water-sealed pipe is equal to the water chamber vacuum pump 3 The water column height _H2 converted from the difference between the maximum operating vacuum pressure and the atmospheric pressure, and the height difference L2 between the bottom interface 4 of the vacuum control tank and the overflow port 6 of the U-shaped water-sealed pipe is not less than the overflow port 6 of the U-shaped water-sealed pipe The height difference L1 with the bottom of the U-shaped water-sealed pipe 5; the bottom of the U-shaped water-sealed pipe 5 is provided with a water discharge pipe 7, and the water-sealed pipe 7 is provided with a water discharge valve 71; Connect the overflow pipe 8 and the vent pipe 9; the overflow pipe 8 is not higher than the overflow port 6 of the U-shaped water seal pipe; the vent pipe 9 is erected, and the opening of the vent pipe 9 is higher than the overflow port 6 of the U-shaped water seal pipe lower than the bottom interface 4 of the vacuum control tank; the U-shaped water seal pipe 5 is connected with a water injection pipe 10 on the side connected to the bottom interface 4 of the vacuum control tank, and the water injection pipe 10 is provided with a water injection valve 11; the water injection pipe 10 and the U-shaped The interface of the water seal pipe 5 is higher than the bottom of the U-shaped water seal pipe 5 and lower than the overflow port 6 of the U-shaped water seal pipe.

The water discharge valve 71 is a vacuum cut-off valve.

The water injection valve 11 is also a vacuum cut-off valve.

Both the overflow pipe 8 and the drain pipe 7 are connected to a drain main pipe 12 .

The main drainage pipe 12 is located below the U-shaped water seal pipe 5 .

The height of the water column converted from the local atmospheric pressure is: H ₁ =P ₀ ×1000×V/g; (this formula is common knowledge)

In the formula, H ₁ is the height of the water column, m;

P ₀ is the local atmospheric pressure, kPa;

V is the specific volume of normal temperature water, m ³ /kg;

g is the local gravity acceleration, m/s ² .

The water column height converted from the difference between the maximum operating vacuum pressure and the atmospheric pressure of the water chamber vacuum pump is: H ₂ =( P ₀ -P ₁ )×1000×V/g ; (this formula is common knowledge)

In the formula, _H2 is the height of the water column, m;

P ₀ is the local atmospheric pressure, kPa;

P ₁ is the maximum operating vacuum pressure of the water chamber vacuum pump, kPa;

V is the specific volume of normal temperature water, m ³ /kg;

g is the local gravity acceleration, m/s ² .

When the unit is initially running, open the water injection valve 11, fill the U-shaped water seal pipe 5 with water through the water injection pipe 10, open the water discharge valve 71, and drain the air in the U-shaped water seal pipe 5 until the overflow pipe 8 overflows. Close the drain valve 71, and then close the water injection valve 11.

After the water chamber vacuum pump 3 is started, due to the suction force of the vacuum, the water level on both sides of the U-shaped water-sealed pipe 5 produces a height difference. When the water chamber vacuum pump 3 has the maximum vacuum pressure, the maximum height difference on both sides of the U-shaped water-sealed pipe 5 is basically fixed. the

As the amount of water accumulated in the vacuum control tank 1 increases, the water levels on both sides of the U-shaped water-sealed pipe 5 rise simultaneously, and finally the water level on one side reaches the elevation of the overflow port 6 of the U-shaped water-sealed pipe, and the highest water level on the other side is higher than the U-shaped water level. The sealing pipe overflow port 6 is higher than the above-mentioned maximum height difference. If the water volume continues to increase, the excess water will be drained through the overflow pipe 8, so as to realize the automatic drainage of the vacuum control tank 1 without affecting the vacuum of the water chamber. Control tank 1 vacuum state.

The height difference L1 between the overflow port 6 of the U-shaped water-sealed pipe and the bottom of the U-shaped water-sealed pipe 5 is equal to the height of the water column converted from the local atmospheric pressure, and the height difference between the bottom interface 4 of the vacuum control tank and the overflow port 6 of the U-shaped water-sealed pipe L2 is equal to the height of the water column converted from the difference between the maximum operating vacuum pressure of the water chamber vacuum pump 3 and the atmospheric pressure, and the height difference L2 between the bottom interface 4 of the vacuum control tank and the overflow port 6 of the U-shaped water-sealed pipe is not less than the overflow of the U-shaped water-sealed pipe. The height difference L1 between the orifice 6 and the bottom of the U-shaped water-sealed pipe 5 can prevent air from leaking into the system under full vacuum and ensure the vacuum requirement of the system.

The above is only the preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And retouching should also be regarded as the protection scope of the present utility model. .

Claims (5)

1. The automatic drainage device for the vacuum control tank of the water chamber is characterized in that it includes a vertical vacuum control tank, the top of the vacuum control tank is connected to the condenser water chamber and the water chamber vacuum pump through a pipeline; the vacuum control tank is connected to the vertical through its bottom interface The U-shaped water-sealed pipe, the opening of the U-shaped water-sealed pipe away from the bottom interface of the vacuum control tank is the U-shaped water-sealed pipe overflow port; the height difference between the U-shaped water-sealed pipe overflow port and the bottom of the U-shaped water-sealed pipe is equal to the local The height of the water column converted from the atmospheric pressure, the height difference between the bottom interface of the vacuum control tank and the overflow port of the U-shaped water seal pipe is equal to the height of the water column converted from the difference between the maximum operating vacuum pressure of the vacuum pump in the water chamber and the atmospheric pressure, and the bottom interface of the vacuum control tank The height difference from the overflow port of the U-shaped water-sealed pipe is not less than the height difference between the overflow port of the U-shaped water-sealed pipe and the bottom of the U-shaped water-sealed pipe; Valve; the overflow port of the U-shaped water-sealed pipe is connected to the overflow pipe and the vent pipe respectively through a three-way pipe; the overflow pipe is not higher than the overflow port of the U-shaped water-sealed pipe; the vent pipe is vertical, and the opening of the vent pipe is higher than the U The overflow port of the U-shaped water seal pipe is lower than the bottom interface of the vacuum control tank; the side of the U-shaped water seal pipe connected to the bottom interface of the vacuum control tank is connected with a water injection pipe, and a water injection valve is arranged on the water injection pipe; the water injection pipe is connected to the U-shaped water seal pipe. The interface of the water seal pipe is higher than the bottom of the U-shaped water seal pipe and lower than the overflow port of the U-shaped water seal pipe. 2. The automatic drainage device for the vacuum control tank of the water chamber according to claim 1, wherein the water discharge valve is a vacuum shut-off valve. 3. The automatic drainage device for the vacuum control tank of the water chamber according to claim 2, characterized in that the water injection valve is also a vacuum shut-off valve. 4. The automatic drainage device for the vacuum control tank of the water chamber according to claim 3, characterized in that, both the overflow pipe and the drain pipe are connected to the main drainage pipe. 5 . The automatic drainage device for the vacuum control tank of the water chamber according to claim 4 , wherein the main drainage pipe is located below the U-shaped water seal pipe. 6 .

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