Anti-freezing ice blowing system of pumped storage power station

Abstract

The utility model provides an anti-freezing ice blowing system for a pumped storage power station. The anti-freezing ice blowing system comprises a temperature sensor, an air tank, an air delivery pipe, an electric valve, an air nozzle, a control box, a signal cable and a liquid level transmitter, a row of air sprayers are fixedly mounted below the anti-freezing ice-blowing water surface, and the air spraying directions of the air sprayers face the anti-freezing ice-blowing water surface; the air nozzle is connected to the air tank through an air delivery pipe; an electric valve is installed on a pipeline of the gas conveying pipe. According to the anti-freezing ice blowing system of the pumped storage power station, the outdoor air temperature is monitored, the anti-freezing ice blowing system is started in time to disturb the water surface, the water surface can be effectively prevented from freezing, extrusion damage caused by ice covers formed near a building and a gate is avoided, accidents are prevented from expanding, and the anti-freezing ice blowing system has the advantages of being simple in structure, small in occupied area and high in practicability. The device is economical and practical, has good anti-freezing and ice-blowing effects, and can operate continuously.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering, and in particular relates to an antifreeze and ice blowing system for a pumped storage power station. Background Art

[0002] The extreme temperature in winter at pumped-storage power station reservoirs in extremely cold regions reaches below -30℃. In the early stage of water storage, the ice is thicker in winter, with some ice reaching a thickness of more than 1m. It expands in all directions, forming a large ice cover squeezing pressure on the buildings and gate equipment around the reservoir, which can easily cause the gates to deform and leak, affecting the safe operation of the reservoir.

[0003] In the prior art, it is common to manually dig a channel between buildings and gates and the ice surface to reduce the ice pressure on buildings and gates to ensure safety. This method is time-consuming and labor-intensive. Some power stations are equipped with ice-breaking systems, which use submersible pumps, which are arranged underwater and use pumps to circulate water to disturb the water surface to remove ice. This method requires multiple water pumps to work simultaneously because the range of water surface disturbance by a single water pump is limited. In addition, the submersible pump is arranged underwater for a long time, which puts high requirements on the insulation performance of the water pump motor, cable, etc., and the controllability is poor. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides an antifreeze and ice blowing system for a pumped storage power station, which can effectively solve the above problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model provides an antifreeze ice blowing system for a pumped storage power station, comprising a temperature sensor (1), a gas tank (4), a gas transmission pipe, an electric valve (6), an air nozzle (9), a control box (10), a signal cable (11) and a liquid level transmitter (12);

[0007] A row of air nozzles (9) are fixedly installed below the antifreeze and ice-blowing water surface, and the jet direction of the air nozzles (9) is toward the antifreeze and ice-blowing water surface; the air nozzles (9) are connected to the gas tank (4) through the gas pipeline; and the electric valve (6) is installed on the pipeline of the gas pipeline;

[0008] The liquid level transmitter (12) is installed around the antifreeze ice blowing water surface; the temperature sensor (1) is installed in the external environment of the antifreeze ice blowing water surface;

[0009] The temperature sensor (1), the liquid level transmitter (12) and the electric valve (6) are all connected to the control box (10) via the signal cable (11).

[0010] Preferably, the gas supply pipe comprises a metal hose (7) and a T-shaped hard pipe (8) which are connected; one end of the metal hose (7) is connected to the gas tank (4); the other end of the metal hose (7) is connected to one end of the T-shaped hard pipe (8); the other end of the T-shaped hard pipe (8) is connected to each of the air nozzles (9).

[0011] Preferably, the air inlet end of the gas tank (4) is connected to the air compressor (2) via an air supply pipeline; a check valve (3) is installed on the air supply pipeline; a pressure transmitter (5) is installed at the sampling end of the gas tank (4); and the pressure transmitter (5) is connected to the control box (10) via the signal cable (11).

[0012] The utility model provides a pumped storage power station antifreeze ice blowing system with the following advantages:

[0013] The utility model provides an antifreeze and ice blowing system for a pumped storage power station. By monitoring the outdoor air temperature, the antifreeze and ice blowing system is started in time to disturb the water surface, which can effectively prevent the water surface from freezing, thereby avoiding the formation of ice covers near buildings and gates to cause squeezing damage and prevent accidents from expanding. The utility model has the advantages of simple structure, small footprint, economy and practicality, good antifreeze and ice blowing effect and continuous operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model provides a structural schematic diagram of an antifreeze and ice blowing system for a pumped storage power station.

[0015] in:

[0016] 1---temperature sensor; 2---air compressor; 3---check valve; 4---gas tank; 5---pressure transmitter; 6---electric valve; 7---metal hose; 8---T-type hard pipe; 9---air nozzle; 10---control box; 11---signal cable; 12---liquid level transmitter. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] The utility model provides an antifreeze and ice blowing system for a pumped storage power station. By monitoring the outdoor air temperature, the antifreeze and ice blowing system is started in time to disturb the water surface, which can effectively prevent the water surface from freezing, thereby avoiding the formation of ice covers near buildings and gates to cause squeezing damage and prevent accidents from expanding. The utility model has the advantages of simple structure, small footprint, economy and practicality, good antifreeze and ice blowing effect and continuous operation.

[0019] See also Figure 1 The utility model provides an antifreeze and ice blowing system for a pumped storage power station, comprising a temperature sensor 1, a gas tank 4, a gas pipe, an electric valve 6, an air nozzle 9, a control box 10, a signal cable 11 and a liquid level transmitter 12;

[0020] A row of air nozzles 9 are fixedly installed below the antifreeze ice blowing water surface, and the jet direction of the air nozzles 9 is toward the antifreeze ice blowing water surface; the air nozzles 9 are connected to the gas tank 4 through the gas pipeline; an electric valve 6 is installed on the pipeline of the gas pipeline;

[0021] A liquid level transmitter 12 is installed around the antifreeze ice blowing water surface; a temperature sensor 1 is installed in the external environment of the antifreeze ice blowing water surface;

[0022] The temperature sensor 1 , the liquid level transmitter 12 and the electric valve 6 are all connected to the control box 10 via a signal cable 11 .

[0023] To facilitate installation, the gas supply pipe includes a connected metal hose 7 and a T-shaped hard pipe 8; one end of the metal hose 7 is connected to the gas tank 4; the other end of the metal hose 7 is connected to one end of the T-shaped hard pipe 8; the other end of the T-shaped hard pipe 8 is connected to each air nozzle 9.

[0024] In the utility model, the air inlet end of the gas tank 4 is connected to the air compressor 2 through an air supply pipeline; a check valve 3 is installed on the air supply pipeline; a pressure transmitter 5 is installed at the sampling end of the gas tank 4; and the pressure transmitter 5 is connected to the control box 10 through a signal cable 11.

[0025] The utility model provides an antifreeze and ice blowing system for a pumped storage power station, and its working principle is:

[0026] (1) A temperature sensor 1 is arranged in the external environment of the antifreeze blowing water surface, and is used to monitor and collect ambient temperature signals in real time and transmit them to the control box 10;

[0027] (2) When the ambient temperature drops to the set temperature, the antifreeze and ice blowing system needs to be started. Therefore, the control box 10 opens the electric valve 6, and the compressed air in the gas tank 4 passes through the electric valve 6, the metal hose 7 and the T-shaped hard pipe 8, and is sprayed toward the water surface by the air nozzle 9, thereby disturbing the water surface to remove ice;

[0028] Among them, the air nozzle 9 is arranged on the underwater T-shaped hard steel pipe in a row, which can spray the water surface in a short time and continuously in all directions, thereby disturbing the water surface and preventing the water surface from freezing;

[0029] (3) When the air nozzle 9 disturbs the de-icing, the liquid level transmitter 12 is arranged around the antifreeze and ice blowing water surface to collect the water level fluctuation signal and transmit it to the control box 10; therefore, the control box 10 can judge whether the antifreeze and ice blowing system is operating normally and whether there is any fault according to the water level fluctuation signal, thereby providing a basis for the power station inspection personnel to handle the fault in time.

[0030] (4) When the air nozzle 9 disturbs and de-ices, the pressure signal in the gas tank 4 is collected through the pressure transmitter 5 and transmitted to the control box 10; therefore, the control box 10 can determine whether the pressure in the gas tank 4 is too low. If so, the air compressor 2 can be controlled, and the air compressor 2 starts to replenish air into the gas tank 4. After the air pressure reaches the rated value, the air replenishment is stopped; this design can extend the working time of the antifreeze and ice blowing system.

[0031] By setting the temperature sensor 1, the start and stop of the antifreeze and ice blowing system, as well as the start and stop frequency, time interval, etc., can be controlled according to the ambient temperature signal, so as to achieve long-term continuous antifreeze and ice blowing.

[0032] The following is a large-scale pumped storage power station project using the technical solution of the utility model as an example and further explained in conjunction with the accompanying drawings:

[0033] A large pumped storage power station project in northern China, the lowest temperature in the lower reservoir is -37.6℃, and the storage capacity of the lower reservoir is about 17 million m 3 A set of arc-shaped working surfaces is set in the flood discharge and emptying hole. The size of the arc-shaped working door opening is 6×6m (width×height). It is normally closed in winter to block water. There is a risk of being squeezed and damaged by ice cover in the early stage of water storage in winter. The antifreeze and ice blowing system of the pumped storage power station of the utility model is adopted. A set of temperature sensors 1 is set outside the gate opening and closing machine building of the flood discharge and emptying hole. When the temperature drops, the temperature sensor 1 set outdoors sends a signal, and the control box 10 automatically opens the electric valve 6. The compressed air passes through the gas tank 4, the electric valve 6, the metal hose 7, and the T-shaped hard pipe 8 to reach the air nozzle 9 and be discharged, disturbing the water surface to de-ice;

[0034] The control box 10 automatically controls the air compressor 2 to start replenishing air to the air tank 4 according to the low pressure signal in the air tank 4 collected by the pressure transmitter 5. When the air pressure reaches the rated value, the air replenishment is automatically stopped. The liquid level transmitter 12 is set near the water surface to collect water level fluctuation signals, so as to judge the operation and fault conditions of the antifreeze and ice blowing system and give an alarm, providing a basis for the power station inspection personnel to handle the faults in time. The flow rate of the air compressor 2 is 2m 3 / min, pressure is 0.8Mpa; gas tank volume is 1m 3 , the pressure is 0.8Mpa.

[0035] By adopting the above technical solution disclosed in the utility model, the following beneficial effects are obtained:

[0036] (1) The system can be combined with the gate opening and closing machine room of the pumped storage power station reservoir, with a simple structure, small footprint, and economical and practical;

[0037] (2) The system can effectively prevent ice from forming on the reservoir surface in extremely cold regions during winter, which could cause damage to buildings or gates and thus affect the safe operation of the reservoir.

[0038] (3) Use temperature sensors to monitor and collect outdoor temperature signals in real time. According to the temperature changes, control the automatic start and stop of the antifreeze and ice blowing system, as well as the start and stop frequency and time interval, to save energy and protect the environment, and help realize a "unmanned and less-staffed" smart power station.

[0039] (4) The hard steel pipe on which the air nozzle is installed is connected by a hose, which facilitates nozzle maintenance and can be widely used in pumped storage power station system projects.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A pumped storage power station antifreeze ice blowing system, characterized in that: It comprises a temperature sensor (1), a gas tank (4), a gas pipe, an electric valve (6), an air nozzle (9), a control box (10), a signal cable (11) and a liquid level transmitter (12); A row of air nozzles (9) are fixedly installed below the antifreeze and ice-blowing water surface, and the jet direction of the air nozzles (9) is toward the antifreeze and ice-blowing water surface; the air nozzles (9) are connected to the gas tank (4) through the gas pipeline; and the electric valve (6) is installed on the pipeline of the gas pipeline; The liquid level transmitter (12) is installed around the antifreeze ice blowing water surface; the temperature sensor (1) is installed in the external environment of the antifreeze ice blowing water surface; The temperature sensor (1), the liquid level transmitter (12) and the electric valve (6) are all connected to the control box (10) via the signal cable (11).

2. The antifreeze and ice blowing system for a pumped storage power station according to claim 1, characterized in that: The gas delivery pipe comprises a metal hose (7) and a T-shaped hard pipe (8) which are connected; one end of the metal hose (7) is connected to the gas tank (4); the other end of the metal hose (7) is connected to one end of the T-shaped hard pipe (8); the other end of the T-shaped hard pipe (8) is connected to each of the air nozzles (9).

3. The antifreeze and ice blowing system for a pumped storage power station according to claim 1, characterized in that: The air inlet end of the gas tank (4) is connected to the air compressor (2) via an air supply pipeline; a check valve (3) is installed on the air supply pipeline; a pressure transmitter (5) is installed at the sampling end of the gas tank (4); and the pressure transmitter (5) is connected to the control box (10) via the signal cable (11).

Images