Low-liquid-level automatic water replenishing device for reactive compensation water cooling system of wind power plant

Abstract

The utility model discloses a low-liquid-level automatic water replenishing device for a reactive compensation water cooling system of a wind power plant. The low-liquid-level automatic water replenishing device comprises a cooling water tank, a water replenishing tank and an automatic water replenishing system, the automatic water replenishing system is arranged, the floating ball switch is additionally arranged on the cooling water tank, and the output feedback point of the floating ball switch is connected to the water pumping motor contactor of the water replenishing tank, so that when a low liquid level contact is triggered, the water pumping motor is started to replenish water to the cooling water tank, and when the water level reaches the middle position of the cooling water tank, the water pumping motor is started to replenish water to the cooling water tank. The floating ball switch is triggered again, the water pumping motor stops, the purpose of automatic water replenishing is achieved, a non-low water level warning signal is maintained not to be triggered forever, irregular routing inspection and manual water replenishing work every day are omitted, a large amount of manpower and time are saved, safe and stable operation of the device can be guaranteed through automatic control, and the generating capacity and the operation income are guaranteed. Further possibility is provided for exploring the unattended wind power plant, and cost reduction and benefit increase of enterprises are helped.

Description

Technical Field

[0001] The utility model relates to the field of reactive power compensation water cooling technology for wind farms, in particular to an automatic water replenishing device for low liquid level of reactive power compensation water cooling system in wind farms. Background Art

[0002] In the daily operation and maintenance of the water-cooled cooling system unit of wind power generation, due to the low pressure of the daily water-cooled system and the frequent occurrence of water shortage faults in the water-cooled pump, but after inspection, there are no substantial faults, mostly due to the daily loss of the water-cooled liquid and the influence of thermal expansion and contraction. Due to the large temperature difference between winter and summer, the liquid level of the cooling system changes frequently. When the sudden low temperature occurs in winter, the cooling liquid level is easy to reach the lowest value, and the reactive power compensation device triggers an alarm signal, the protection device is locked, and the output is reduced to 0. According to the dispatching requirements, when the output of the reactive power compensation device is 0, all the wind turbines need to be disconnected, which affects the power generation and operation income of the wind farm.

[0003] The current treatment method is to replenish the liquid manually, which takes a long time and has a large intensity, affects the utilization rate of the unit, and the power generation of the unit will also be affected. Content of the Utility Model

[0004] Therefore, in order to solve the above deficiencies, the utility model provides an automatic water replenishing device for low liquid level of reactive power compensation water cooling system in wind farms.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions: an automatic water replenishing device for low liquid level of reactive power compensation water cooling system in wind farms, including a cooling water tank, a water replenishing tank and an automatic water replenishing system. The top of the cooling water tank is connected with a water inlet pipe, the bottom of the cooling water tank is connected with a water outlet pipe. The water replenishing tank is connected with the cooling water tank through the water inlet pipe. The automatic water replenishing system includes a float switch, a pumping motor and an output circuit. The float switch is arranged inside the cooling water tank, the float switch is electrically connected with the pumping motor through the output circuit, and the pumping motor is connected with the water inlet pipe.

[0006] As a further scheme of the utility model, a first one-way valve is arranged on the water inlet pipe, and a second one-way valve is arranged on the water outlet pipe. The first one-way valve is used to ensure that the liquid in the water inlet pipe flows unidirectionally from the water replenishing tank to the cooling water tank, and the second one-way valve is used to ensure that the liquid in the water outlet pipe flows unidirectionally out of the cooling water tank.

[0007] As a further scheme of the utility model, a first drainage pipe is arranged at the top on one side of the cooling water tank, and the first drainage pipe is connected with the water replenishing tank. The first drainage pipe is used to recycle the liquid discharged outward when the liquid level of the cooling water tank reaches the peak to the water replenishing tank.

[0008] As a further solution of the present utility model, a third one-way valve is provided in the first drainage pipe, and the third one-way valve is used to ensure the one-way flow of the liquid in the first drainage pipe into the replenishing water tank.

[0009] As a further solution of the present utility model, a second drainage pipe is provided at the bottom on one side of the cooling water tank, and the second drainage pipe is communicated with the replenishing water tank, and the second drainage pipe is used for the user to manually discharge the liquid in the cooling water tank into the replenishing water tank.

[0010] As a further solution of the present utility model, a switch valve is provided on the second drainage pipe, and the switch valve is used to control the flow of the liquid on the second drainage pipe.

[0011] As a further solution of the present utility model, the water inlet pipe communicates with the water pumping motor, the cooling water tank and the replenishing water tank. The replenishing water tank is communicated with the water pumping motor through the water inlet pipe, and the water pumping motor is communicated with the cooling water tank through the water inlet pipe.

[0012] Preferably, two sets of contact positions are arranged inside the float switch, a contactor is arranged inside the water pumping motor, and the contactor is electrically connected to the output circuit.

[0013] Compared with the prior art, the present utility model provides a low-level automatic water replenishing device for a reactive power compensation water cooling system in a wind farm, and has the following beneficial effects:

[0014] In the present utility model, by setting up an automatic water replenishing system, a float switch is added to the cooling water tank, and the output feedback point of the float switch is connected to the contactor of the water pumping motor in the replenishing water tank. When the low-level contact is triggered, the water pumping motor starts to replenish water to the cooling water tank. When the water level reaches the middle position of the cooling water tank, the float switch is triggered again, and the water pumping motor stops, achieving the purpose of automatic water replenishment, maintaining the non-triggering of the low water level warning signal forever, saving the irregular inspection and manual water replenishment work every day, saving a large amount of manpower and time, and being able to ensure the safe and stable operation of the device through automatic control, ensuring the power generation and operation benefits, providing a further possibility for exploring unmanned wind farms, and helping enterprises reduce costs and increase efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a sectional structural schematic diagram of the present utility model;

[0017] Figure 3 is a schematic diagram of the low-level contact position of the float switch of the present utility model;

[0018] Figure 4It is a schematic diagram of the high-level contact position of the float switch of the present utility model;

[0019] Figure 5 It is a schematic diagram of the circuit principle of the structure float switch of the present utility model.

[0020] Among them: cooling water tank - 1, water inlet pipe - 11, first check valve - 111, make-up water tank - 2, second check valve - 121, water outlet pipe - 12, first drain pipe - 13, third check valve - 131, second drain pipe - 14, on-off valve - 141, float switch - 31, pumping motor - 32, output circuit - 33. Specific embodiments

[0021] In order to further explain the technical solution of the present utility model, it will be elaborated in detail through specific embodiments below.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figure 1-2 In the embodiments of the present utility model:

[0025] An automatic water replenishing device for low liquid level in a reactive power compensation water cooling system of a wind farm, comprising a cooling water tank 1, a water replenishing tank 2 and an automatic water replenishing system 3. The top of the cooling water tank 1 is connected to a water inlet pipe 11, and the bottom of the cooling water tank 1 is connected to a water outlet pipe 12. The water replenishing tank 2 is connected to the cooling water tank 1 through the water inlet pipe 11. The automatic water replenishing system 3 includes a floating ball switch 31, a pumping motor 32 and an output circuit 33. The floating ball switch 31 is arranged inside the cooling water tank 1, and the floating ball switch 31 is electrically connected to the pumping motor 32 through the output circuit 33. The pumping motor 32 is connected to the water inlet pipe 11.

[0026] Please refer to Figure 1-2 , in the embodiment of the present utility model: A first one-way valve 111 is arranged on the water inlet pipe 11, and a second one-way valve 121 is arranged on the water outlet pipe 12. The first one-way valve 111 is used to ensure that the liquid in the water inlet pipe 11 flows unidirectionally from the water replenishing tank 2 to the cooling water tank 1, and the second one-way valve 121 is used to ensure that the liquid in the water outlet pipe 12 flows unidirectionally out of the cooling water tank 1.

[0027] Please refer to Figure 1-2 , in the embodiment of the present utility model: A first drain pipe 13 is arranged at the top on one side of the cooling water tank 1. The first drain pipe 13 is connected to the water replenishing tank 2. The first drain pipe 13 is used to recover the liquid discharged outward when the cooling water tank 1 reaches the peak to the water replenishing tank 2.

[0028] Please refer to Figure 1-2 , in the embodiment of the present utility model: A third one-way valve 131 is arranged on the first drain pipe 13. The third one-way valve 131 is used to ensure that the liquid in the first drain pipe 13 flows unidirectionally into the water replenishing tank 2.

[0029] Please refer to Figure 1-2 , in the embodiment of the present utility model: A second drain pipe 14 is arranged at the bottom on one side of the cooling water tank 1. The second drain pipe 14 is connected to the water replenishing tank 2. The second drain pipe 14 is used for the user to manually drain the liquid in the cooling water tank 1 into the water replenishing tank 2.

[0030] Please refer to Figure 1-2 , in the embodiment of the present utility model: A switch valve 141 is arranged on the second drain pipe 14. The switch valve 141 is used to control the flow of the liquid on the second drain pipe 14.

[0031] Please refer to Figure 1-2, in the embodiment of the present utility model: the water inlet pipe 11 is connected to the water pumping motor 32, the cooling water tank 1 and the water replenishing tank 2. The water replenishing tank 2 is connected to the water pumping motor 32 through the water inlet pipe 11, and the water pumping motor 32 is connected to the cooling water tank 1 through the water inlet pipe 11.

[0032] Preferably, there are two sets of contact positions inside the floating ball switch 31, and there is a contactor inside the water pumping motor 32. The contactor is electrically connected to the output circuit 33.

[0033] Furthermore, when the water level inside the cooling water tank 1 is higher than the position of the first drain pipe, the liquid inside the cooling water tank 1 will flow back to the water replenishing tank 2.

[0034] Please refer to Figures 3-5 , in the embodiment of the present utility model:

[0035] When the liquid level in the cooling water tank 1 is at a low level (such as Figure 3 ), the floating ball switch 31 triggers the low liquid level contact position. The output feedback point of the floating ball switch 31 is connected to the contactor of the water pumping motor 32. When the low liquid level contact is triggered, the water pumping motor 32 starts to replenish water to the cooling water tank 1. When the water level reaches the high level of the liquid level in the cooling water tank 1, the floating ball switch 31 is triggered again and the water pumping motor 32 stops, achieving the purpose of automatic water replenishment.

[0036] Compared with the prior art, the present utility model provides a device for automatically replenishing water when the liquid level is low in a reactive power compensation water cooling system for a wind farm, having the following beneficial effects:

[0037] In the present utility model, by setting up the automatic water replenishment system 3, adding the floating ball switch 31 in the cooling water tank 1 and connecting the output feedback point of the floating ball switch 31 to the contactor of the water pumping motor 32 of the water replenishing tank 2. When the low liquid level contact is triggered, the water pumping motor 32 starts to replenish water to the cooling water tank 1. When the water level reaches the middle position of the cooling water tank 1, the floating ball switch 31 is triggered again and the water pumping motor 32 stops, achieving the purpose of automatic water replenishment, maintaining the non-triggering of the water level not being low warning signal forever, saving the irregular inspection and manual water replenishment work every day, saving a large amount of manpower and time, and being able to ensure the safe and stable operation of the device through automatic control, ensuring the power generation and operation benefits, providing a further possibility for exploring unmanned wind farms, and helping the enterprise reduce costs and increase efficiency.

[0038] The control method of the present utility model is controlled by manually starting and closing the switch. The wiring diagram of the power element and the power supply provision belong to the common knowledge in the field. And the present utility model is mainly used to protect the mechanical device, so the control method and wiring layout of the present utility model will not be explained in detail anymore.

[0039] The control mode of the present utility model is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming of those skilled in the art. The provision of power also belongs to the common general knowledge in the art. Moreover, the present utility model is mainly used to protect mechanical devices. Therefore, the control mode and circuit connection of the present utility model will not be explained in detail herein.

[0040] The foregoing are only the preferred examples of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic water replenishment device for low liquid level in a wind farm reactive power compensation water cooling system, characterized in that: It comprises a cooling water tank (1), the top of the cooling water tank (1) is connected to a water inlet pipe (11), and the bottom of the cooling water tank (1) is connected to a water outlet pipe (12); A water supply tank (2), wherein the water supply tank (2) is connected to the cooling water tank (1) via a water inlet pipe (11); An automatic water replenishment system (3), the automatic water replenishment system (3) comprising a float switch (31), a water pumping motor (32) and an output circuit (33), the float switch (31) being arranged inside the cooling water tank (1), the float switch (31) being electrically connected to the water pumping motor (32) via the output circuit (33), and the water pumping motor (32) being connected to a water inlet pipe (11).

2. According to claim 1, a wind farm reactive power compensation water cooling system low liquid level automatic water replenishment device is characterized by: The water inlet pipe (11) is provided with a first one-way valve (111), and the water outlet pipe (12) is provided with a second one-way valve (121).

3. According to claim 1, the automatic water replenishment device for low liquid level in the reactive power compensation water cooling system of a wind farm is characterized by: A first drainage pipe (13) is provided at the top of one side of the cooling water tank (1), and the first drainage pipe (13) is connected to the water replenishment tank (2).

4. According to claim 3, the automatic water replenishment device for low liquid level in the reactive power compensation water cooling system of a wind farm is characterized by: The first drainage pipe (13) is provided with a third one-way valve (131).

5. According to claim 1, the automatic water replenishment device for low liquid level in the reactive power compensation water cooling system of a wind farm is characterized by: A second drainage pipe (14) is provided at the bottom of one side of the cooling water tank (1), and the second drainage pipe (14) is connected to the water replenishment tank (2).

6. According to claim 5, the automatic water replenishment device for low liquid level in the reactive power compensation water cooling system of a wind farm is characterized by: The second drainage pipe (14) is provided with a switch valve (141).

7. According to claim 1, the automatic water replenishment device for low liquid level in the reactive power compensation water cooling system of a wind farm is characterized by: The water inlet pipe (11) is connected to the water pumping motor (32), the cooling water tank (1) and the water supply tank (2).

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