Cooling water replenishing device for generator

Abstract

The utility model discloses a generator cooling water replenishing device which comprises a water tank body which is connected with a cooling water circulating pipeline. The water tank body is connected with an electric control water replenishing valve through a water replenishing pipe, and a control signal receiving end of the electric control water replenishing valve is electrically connected with an electric signal output end of a pressure control switch; a buoyancy sensing device is arranged in the water tank body and used for controlling and driving the movable pressing rod to ascend and descend along with up-down floating of the water level, and the pressure control switch is located below the movable pressing rod. The utility model solves the problem that the water quantity of the generator rotor cooling water tank is easy to lose and cannot be timely found to supplement water.

Description

Technical Field

[0001] The utility model relates to the technical field of generator cooling, in particular to a generator cooling water replenishing device. Background Art

[0002] The losses generated when the generator is working are mostly in the form of heat, which makes the operating temperature of the generator higher. Cooling water is usually used for insulation. However, due to the volatilization and leakage of cooling water during the cooling process, the amount of water in the water tank gradually decreases, and the cooling effect is difficult to maintain. Moreover, this loss occurs irregularly and is difficult to be discovered in time. If water is not replenished in time, it is very easy to cause safety problems in the operation of the generator. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a generator cooling water replenishment device to solve the problem that the water volume in the generator rotor cooling water tank is easily consumed and water replenishment cannot be found in time.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a generator cooling water replenishment device, including a water tank body, wherein the water tank body is connected to a cooling water circulation pipeline; the water tank body is connected to an electrically controlled replenishment valve through a replenishment pipe, and a control signal receiving end of the electrically controlled replenishment valve is electrically connected to an electrical signal output end of a pressure-controlled switch; a buoyancy sensing device is arranged in the water tank body, and the buoyancy sensing device is used to control and drive a movable pressure rod to rise and fall with the ups and downs of the water level, and the pressure-controlled switch is located below the movable pressure rod.

[0005] Furthermore, a mounting hole is provided at the bottom of the water tank body, a sealing ring is fixedly provided in the mounting hole, the movable pressure rod is sleeved in the sealing ring, and the upper end of the movable pressure rod is connected to the buoyancy sensing device; a connecting frame is provided on the outer wall surface of the water tank body corresponding to the position of the mounting hole, and the pressure-controlled switch is provided on the connecting frame.

[0006] Furthermore, the buoyancy sensing device is provided with a float, the float is fixedly connected to the top end of the movable pressure rod, the top end of the float is fixedly connected to a floating block, and the top end of the floating block is provided with a water filling port.

[0007] Furthermore, the lower end of the movable pressure rod is connected to a limiting ring.

[0008] Furthermore, a mounting plane of the voltage-controlled switch is arranged on the connecting frame and is arranged parallel to the lower end surface of the limiting ring, and the mounting plane and the lower end surface of the limiting ring are connected via an elastic member.

[0009] Furthermore, a cavity is provided in the wall of the buoy.

[0010] Beneficial effect: The utility model provides a generator cooling water replenishing device, which senses the change of water level in the water tank by setting a buoyancy sensing device, thereby electrically triggering automatic water replenishment. The water level sensing is based on physical buoyancy changes, which is more reliable and effective, and the water replenishment is timely. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0012] Attached Figure 2 For attachment Figure 1 Schematic diagram of partial structure section;

[0013] Attached Figure 3 The figure is a schematic structural diagram of a buoyancy sensing device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] As attached Figure 1-3 The generator cooling water replenishment device comprises a water tank body 1, wherein the water tank body 1 is connected to a cooling water circulation pipeline; the water tank body 1 is connected to an electrically controlled water replenishment valve 3 via a water replenishment pipe 2, and a control signal receiving end of the electrically controlled water replenishment valve 3 is electrically connected to an electrical signal output end of a pressure-controlled switch 4; a buoyancy sensing device 5 is arranged in the water tank body 1, and the buoyancy sensing device 5 is used to control and drive a movable pressure rod 6 to rise and fall with the ups and downs of the water level, and the pressure-controlled switch 4 is located below the movable pressure rod 6.

[0016] This solution uses a buoyancy sensing device to sense the floating changes of the water level in the water tank, thereby controlling the lifting and lowering movement of the movable pressure rod. When the water level drops to a certain position, the movable pressure rod applies pressure to the pressure-controlled switch, thereby triggering an electrical signal to be sent to the electronically controlled water supply valve, controlling the valve body to open, and drawing water from the water supply pipe to replenish the water in the water tank, thereby achieving efficient and accurate automatic water supply and effectively maintaining the cooling effect of the generator.

[0017] The bottom of the water tank body 1 is provided with a mounting hole, a sealing ring 7 is fixedly provided in the mounting hole, the movable pressure rod 6 is sleeved in the sealing ring 7, and the upper end of the movable pressure rod 6 is connected to the buoyancy sensing device 5; the outer wall surface of the water tank body 1 is provided with a connecting frame 8 corresponding to the position of the mounting hole, and the pressure-controlled switch 4 is provided on the connecting frame 8. The sealing ring can seal the gap between the movable pressure rod and the water tank body to avoid water leakage when the movable pressure rod moves. In addition, the connecting frame adopts a cylindrical structure, and the cover is provided on the outside of the mounting hole to ensure the safety of the pressure-controlled switch.

[0018] The buoyancy sensing device 5 is provided with a float 51, which is fixedly connected to the top of the movable pressure rod 6, and the top of the float 51 is fixedly connected to a floating block 52, and a water filling port 53 is provided at the top of the floating block 52. The lower end of the movable pressure rod 6 is connected to a limit ring 61. The mounting plane of the pressure-controlled switch 4 provided on the connecting frame 8 is arranged parallel to the lower end surface of the limit ring 61, and the mounting plane and the lower end surface of the limit ring 61 are connected by an elastic member 62. Among them, the elastic member adopts a compression spring, and the limit ring is used to limit the rising limit position of the movable pressure rod.

[0019] The buoy and the movable pressure rod are coaxially arranged, and the water filling port is connected to the inner cavity of the buoy, and the water in the water tank can enter the buoy through the water filling port. As the water level decreases, the buoyancy of the water on the buoy gradually decreases, and the height of the buoy decreases with the water level. Since a certain amount of water is contained inside the buoy, when the external buoyancy is less than the gravity of the buoy and its internal water, a downward pressure is generated, which drives the movable pressure rod to move downward and compresses the elastic member. When the water level drops to a certain height, the movable pressure rod triggers the pressure-controlled switch to achieve automatic water replenishment. As the water level rises, the buoyancy of the buoy gradually increases. When the buoyancy is greater than the pressure of the buoy and its internal water, the movable pressure rod can be lifted and separated from the pressure-controlled switch to end the water replenishment. The floating block on the top of the buoy plays a role in enhancing the buoyancy, that is, when the water level reaches the height of submerging the floating block, the buoyancy will be significantly increased, so that the movable pressure rod can be quickly lifted to avoid the overflow of water replenishment due to insufficient buoyancy.

[0020] Preferably, a cavity is provided in the wall of the buoy 51. The movable pressure rod is also provided as a hollow structure, and an opening communicating with the outside atmosphere is provided at the bottom. The cavity can be communicated with the atmosphere through the inner cavity of the movable pressure rod. In addition, the water storage cavity inside the buoy is separated from the cavity by a piston plate, and the piston plate is arranged to be raised and lowered along the axial direction of the buoy. The water storage amount in the buoy can be changed by adjusting the height position of the piston plate, thereby changing the total weight of the water storage buoy, and adjusting the water level triggering condition for automatic water replenishment. For example, if it is necessary to trigger automatic water replenishment at a higher water level, the height of the piston plate can be lowered to increase the amount of water that can be stored in the buoy; if it is necessary to trigger automatic water replenishment at a lower water level, the height of the piston plate can be increased to reduce the amount of water that can be stored in the buoy.

[0021] The device requires regular inspection and maintenance to ensure the normal operation of the automatic water replenishment system. Therefore, an observation tube 9 is provided at one end of the water tank body away from the water replenishment pipe. The observation tube adopts a vertically arranged transparent glass tube. The upper and lower ends of the observation tube are respectively connected to the inside of the water tank body through a fixed tube 91 to form an annular communication space, so that the water level in the water tank can be intuitively observed from the water level in the glass tube, thereby judging whether the automatic water replenishment system in the water tank is working normally. A number of connecting pipes 11 with electric control valves are provided at the bottom of the water tank body for externally connecting to the cooling water circulation pipeline to achieve cooling of the generator.

[0022] The above are only preferred embodiments 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A generator cooling water replenishment device, characterized in that: The invention comprises a water tank body (1), wherein the water tank body (1) is connected to a cooling water circulation pipeline; the water tank body (1) is connected to an electrically controlled water supply valve (3) via a water supply pipe (2); a control signal receiving end of the electrically controlled water supply valve (3) is electrically connected to an electrical signal output end of a pressure-controlled switch (4); a buoyancy sensing device (5) is arranged inside the water tank body (1), and the buoyancy sensing device (5) is used to control and drive a movable pressure rod (6) to move up and down as the water level rises and falls; the pressure-controlled switch (4) is located below the movable pressure rod (6).

2. A generator cooling water replenishment device according to claim 1, characterized in that: The bottom of the water tank body (1) is provided with a mounting hole, a sealing ring (7) is fixedly arranged in the mounting hole, the movable pressure rod (6) is sleeved in the sealing ring (7), and the upper end of the movable pressure rod (6) is connected to the buoyancy sensing device (5); the outer wall surface of the water tank body (1) is provided with a connecting frame (8) corresponding to the position of the mounting hole, and the pressure-controlled switch (4) is arranged on the connecting frame (8).

3. A generator cooling water replenishment device according to claim 2, characterized in that: The buoyancy sensing device (5) is provided with a float (51), the float (51) is fixedly connected to the top end of the movable pressure rod (6), the top end of the float (51) is fixedly connected to a floating block (52), and the top end of the floating block (52) is provided with a water filling port (53).

4. A generator cooling water replenishment device according to claim 3, characterized in that: The lower end of the movable pressure rod (6) is connected to a limiting ring (61).

5. A generator cooling water replenishment device according to claim 4, characterized in that: The connection frame (8) is provided with a mounting plane of the voltage-controlled switch (4) which is arranged parallel to the lower end surface of the limiting ring (61); the mounting plane and the lower end surface of the limiting ring (61) are connected via an elastic member (62).

6. A generator cooling water replenishment device according to claim 5, characterized in that: A cavity is arranged in the wall of the buoy (51).

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