Hydropower station expansion water tank water level monitoring system

Abstract

The invention relates to the technical field of hydropower stations, in particular to a hydropower station expansion water tank water level monitoring system which comprises a water tank, the water tank comprises a tank body and a tank cover fixedly installed on the tank body, and the hydropower station expansion water tank water level monitoring system is characterized in that a liquid level meter is arranged in the tank body and comprises a sliding rod, and the sliding rod is sleeved with a liquid level sleeve; the liquid level sleeve penetrates through the box cover and is in sliding connection with the box cover, the outer wall of the liquid level sleeve is provided with liquid level scales, the bottom end of the liquid level sleeve is fixedly sleeved with an air cushion, the air cushion can float on the water surface in the box body, and the water level depth is displayed through the liquid level scales on the outer wall of the liquid level sleeve. The hydropower station expansion water tank water level monitoring system is stable in structure and convenient to maintain, not only can realize water level dual monitoring and data rechecking, but also can realize intelligent pressure relief and automatic reset, has multiple sealing and linkage control, and is strong in adaptability and high in integration level.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydropower stations, and particularly relates to a water level monitoring system for an expansion tank of a hydropower station. BACKGROUND

[0002] In a hydropower station operation system, the expansion tank as a key device undertakes the important function of regulating system water volume and pressure, and the stability of the water level of the expansion tank is directly related to the safety, stability and efficient operation of the entire hydropower station. If the water level of the expansion tank abnormally fluctuates, not only the equipment operation failure may be caused, but also the system pressure imbalance may be caused, and even the overall safety of the hydropower station may be endangered in serious cases.

[0003] At present, the traditional water level monitoring device mostly adopts a mechanical floating ball type or an electronic sensor type structure, and has the following disadvantages: Strong reading dependence: most mechanical liquid level meters need to be read on site by artificial, cannot realize remote real-time monitoring, and are easily disturbed by the environment; Insufficient precision and reliability: the electronic sensor is easily affected by the environment such as water vapor and temperature, and is prone to drift or failure after long-term use; Lack of data review mechanism: the existing system mostly depends on a single signal source, lacks multiple verification means, and the accuracy of the water level data is difficult to guarantee; Inflexible pressure relief control: the traditional pressure relief structure is mostly mechanical or manually controlled, and the response is slow, accurate and automatic pressure release cannot be realized, and there is a safety hazard.

[0004] Therefore, a water level monitoring system with high reliability, double monitoring mechanism and intelligent pressure relief function is urgently needed to improve the operation safety and management efficiency of the expansion tank of the hydropower station. SUMMARY

[0005] The main purpose of the present application is to overcome the deficiencies in the prior art, and to provide a water level monitoring system for an expansion tank of a hydropower station.

[0006] The technical scheme adopted by the present application to achieve the technical purpose is as follows: a water level monitoring system for an expansion tank of a hydropower station, comprising a tank, the tank comprising a tank body and a tank cover fixedly installed on the tank body, characterized in that a liquid level meter is arranged in the tank body, the liquid level meter comprising a sliding rod, an outer wall of the sliding rod being sleeved with a liquid level sleeve, the liquid level sleeve penetrating through the tank cover and being in sliding connection with the tank cover, a liquid level scale being arranged on the outer wall of the liquid level sleeve, and a gas cushion being fixedly sleeved at the bottom end of the liquid level sleeve, the gas cushion being capable of floating on the water surface in the tank body, and the water level depth being displayed through the liquid level scale on the outer wall of the liquid level sleeve.

[0007] Preferably, the bottom of the sliding rod is fixedly installed on the bottom wall of the tank body through an elastic sleeve, and the top is fixedly installed on the bent plate frame through a first spring.

[0008] Preferably, the bent plate frame is provided as a transparent plate, the vertical plate part is fixed on the box cover, and the horizontal plate part is fixedly installed with a first spring, and the first spring is fixed to the top of the slide rod.

[0009] Preferably, the top of the liquid level sleeve is fixedly installed with a scale, and the horizontal plate part of the bent plate frame is fixedly installed with a distance meter for measuring the displacement between the distance meter and the scale.

[0010] Preferably, the distance meter and the scale are provided as a ring structure, the distance meter is sleeved on the outer ring of the first spring and fixed to the horizontal plate part of the bent plate frame, and the scale is fixedly sleeved on the top of the liquid level sleeve.

[0011] Preferably, the top of the box cover is provided with a jacking device, the jacking device comprises a bent ring plate, a cover plate and a top cover, the bent ring plate is fixed on the box cover, the cover plate is fixed on the top of the bent ring plate, and the top cover is sealed on the cover plate.

[0012] Preferably, an electric control telescopic rod is fixedly installed below the box cover, an exhaust hole is formed in the box cover, a bottom plate is arranged above the box cover, the exhaust hole is blocked by a plug column integrally connected to the bottom plate, and the bottom plate is located inside the bent ring plate.

[0013] Preferably, a pad is fixed above the bottom plate, a linkage plate is placed above the pad, top columns are fixedly installed at both ends of the linkage plate, and one end of the top column penetrates through the cover plate and is located below the top cover.

[0014] Preferably, T-shaped rods are arranged at both ends of the top cover, one end of the T-shaped rod penetrates through the top cover and is fixed on the cover plate, a second spring is sleeved outside the T-shaped rod, one end of the second spring is located on the top cover, and the other end of the second spring is located on the T-shaped rod.

[0015] The working principle of the water level monitoring system of the water tank of the hydropower station is as follows: a liquid level gauge is arranged in the tank body of the water tank, the liquid level gauge comprises a slide rod and a liquid level sleeve sleeved outside the slide rod, an air cushion is arranged at the bottom of the liquid level sleeve and can float with the water level, and the water level is directly displayed through the scale on the outer wall of the liquid level sleeve; the bottom of the slide rod is fixed to the bottom of the tank body through an elastic sleeve, and the top of the slide rod is connected to a bent plate frame through a first spring; a scale is fixed to the top of the liquid level sleeve, and a distance meter is installed on the bent plate frame and used for measuring the displacement between the distance meter and the scale, so as to realize the electrical signal monitoring and review of the water level data.

[0016] A jacking device is arranged above the box cover and comprises a bent ring plate, a cover plate and a top cover, an electric control telescopic rod is arranged below the box cover, the bottom plate can be lifted to open the exhaust hole, after the gas enters the bent ring plate, the top cover is opened through the linkage plate and the top column, and the gas is discharged through the exhaust hole, so that the system is depressurized. The top cover is reset and sealed through the T-shaped rod and the second spring; and the sealing cover and the lever are further used for optimizing the linkage and sealing control of the exhaust process.

[0017] Compared with the prior art, the present application has the beneficial effects that: The water level monitoring system for the expansion tank of the hydropower station can realize double monitoring of the water level and data review, directly reads the water level through the scale on the outer wall of the liquid level sleeve, and combines displacement detection of the range finder and the scale plate to form a double monitoring mechanism of mechanical and electrical signals, effectively improving the accuracy and reliability of the water level data.

[0018] The water level monitoring system for the expansion tank of the hydropower station has stable structure and is convenient to maintain, the sliding rod is elastically installed through the elastic sleeve at the bottom and the first spring at the top, which not only enhances the structural stability, but also facilitates disassembly, assembly and maintenance, and is suitable for long-term use under complex working conditions.

[0019] The water level monitoring system for the expansion tank of the hydropower station can realize intelligent pressure relief and automatic reset, the jacking device realizes automatic pressure relief control through the electric control telescopic rod, the linkage plate, the jacking post and the sealing cover and other components, responds quickly, and the exhaust process is controllable; the T-shaped rod and the second spring, the third spring and other structures ensure that each component is automatically reset after exhaust, and the sealing performance is good.

[0020] The water level monitoring system for the expansion tank of the hydropower station has multiple sealing and linkage control systems, realizes double sealing of the exhaust hole and the exhaust hole through the bottom plate and the sealing cover, and further optimizes the opening and control of the exhaust passage through the linkage design of the rocker and the jacking rod, and improves the safety performance of the system under high pressure working conditions.

[0021] The water level monitoring system for the expansion tank of the hydropower station has strong adaptability and high integration, the system structure is compact, each component cooperates, is suitable for expansion tanks of different specifications, has good universality and expansibility, and can be widely applied to hydropower stations and other liquid level monitoring scenes. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of the structure of the water level monitoring system for the expansion tank of the hydropower station.

[0023] Figure 2 It is a front view of the structure of the water level monitoring system for the expansion tank of the hydropower station.

[0024] Figure 3 It is Figure 1 It is an enlarged structure diagram of the jacking device.

[0025] Figure 4 It is a front view of the structure of the jacking device during the exhaust process.

[0026] Figure 5 It is a front view of the structure of the jacking device during the exhaust process.

[0027] Among them: 1 - water tank; 101 - tank body; 102 - tank cover; 2 - liquid level gauge; 201 - slide rod; 202 - liquid level sleeve; 203 - air cushion; 204 - elastic sleeve; 205 - bent plate frame; 206 - first spring; 207 - range finder; 208 - scale; 3 - jacking device; 301 - bent ring plate; 302 - cover plate; 303 - top cover; 304 - electric control telescopic rod; 305 - bottom plate; 306 - exhaust hole; 307 - linkage plate; 308 - jacking post; 309 - T-shaped rod; 310 - second spring; 311 - pad plate; 312 - plug post; 4 - lever; 401 - top rod; 402 - sealing cover; 403 - mounting groove; 404 - third spring; 405 - air release hole; 406 - limiting groove. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions, and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely used to explain the present application and should not be used to limit the scope of the present application. In addition, in the following description, the description of well-known structures and techniques is omitted to avoid unnecessary confusion of the concept of the present application.

[0029] In the description of the present application, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] In the description of the present application, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are merely used to distinguish the description and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more, unless otherwise explicitly and specifically limited.

[0031] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment 1

[0032] Please refer to Figure 1 A water level monitoring system for an expansion tank of a hydropower station, comprising a tank 1, the tank 1 comprising a tank body 101 and a tank cover 102 fixedly installed on the tank body 101, a liquid level gauge 2 arranged in the tank body 101, the liquid level gauge 2 comprising a slide rod 201, the slide rod 201 being externally sleeved with a liquid level sleeve 202, the liquid level sleeve 202 penetrating through the tank cover 102 and being in sliding connection with the tank cover 102, the outer wall of the liquid level sleeve 202 being provided with a liquid level scale, and the bottom end of the liquid level sleeve 202 being fixedly sleeved with an air cushion 203, the air cushion 203 being capable of floating on the water surface in the tank body 101, and the water level depth being displayed through the liquid level scale on the outer wall of the liquid level sleeve 202.

[0033] Further, in the present embodiment, the bottom of the slide rod 201 is fixedly installed on the bottom wall of the tank body 101 through an elastic sleeve 204, and the top is fixedly installed on a bent plate frame 205 through a first spring 206. The elastic sleeve 204 is composed of a shock-absorbing spring and a limiting sleeve, the shock-absorbing spring being placed inside the limiting sleeve, and the bottom of the slide rod 201 being directly inserted into the limiting sleeve to form an elastic connection with the shock-absorbing spring; the bent plate frame 205 is provided as a transparent plate, the vertical plate part being fixed on the tank cover 102, and the horizontal plate part being fixedly installed with the first spring 206, the top of the slide rod 201 being fixed with the first spring 206, and the slide rod 201 being elastically installed through the first spring 206 and the elastic sleeve 204, so that the slide rod 201 can be tightly connected for easy disassembly and assembly in the later stage.

[0034] Further, in the present embodiment, the top of the liquid level sleeve 202 is fixedly installed with a scale plate 208, and the horizontal plate part of the bent plate frame 205 is fixedly installed with a distance meter 207, the distance meter 207 measuring the displacement between the distance meter 207 and the scale plate 208.

[0035] When there is no water in the tank body 101, the air cushion 203 is located at the bottom of the tank body 101, and the scale plate 208 is attached to the tank cover 102, at this time, the scale on the liquid level sleeve 202 is "0", and the data measured by the distance meter is recorded in real time.

[0036] When the box 101 is filled with water, the air cushion 203 rises with the water level, at this time the liquid level sleeve 202 and the scale plate 208 are raised, so that the water level height can be reflected through the scale on the liquid level sleeve 202, and the scale on the liquid level sleeve 202 can be directly observed to observe the water level; At the same time, the displacement change between the rangefinder 207 and the scale plate 208 is measured, the distance between the rangefinder 207 and the scale plate 208 is reduced, the rangefinder 207 can transmit the water level data and upload the record; since the data change measured by the rangefinder 207 should be consistent with the scale change on the liquid level sleeve 202, the rangefinder 207 and the liquid level sleeve 202 also have the function of checking the water level data.

[0037] Further, in the embodiment, the rangefinder 207 and the scale plate 208 are arranged in a ring structure, the rangefinder 207 is sleeved on the outer circle of the first spring 206 and fixed on the horizontal plate part of the bending plate frame 205, and the scale plate 208 is fixedly sleeved on the top of the liquid level sleeve 202. The ring structure of the rangefinder 207 and the scale plate 208 facilitates the installation of components and distance measurement, so that the overall structure is more reasonable.

[0038] Specifically, in use, when the box 101 is empty, the air cushion 203 falls to the bottom of the box 101, the scale of the liquid level sleeve 202 is zero, the scale plate 208 is attached to the box cover 102, and the rangefinder 207 records the initial data; when the box 101 is filled with water, the air cushion 203 rises with the water level and drives the liquid level sleeve 202 to slide upward along the slide rod 201, the water level height can be directly read through the scale on the outer wall of the liquid level sleeve 202, at the same time, the scale plate 208 moves upward with the liquid level sleeve 202, which causes the distance between the scale plate 208 and the rangefinder 207 to be reduced, the rangefinder 207 detects the displacement change in real time and uploads the water level data for record, realizing the double checking function of visual reading and electrical signal monitoring of the water level. Embodiment 2

[0039] Please refer to Figures 1-2 On the basis of the above embodiment, the water level monitoring system of the hydropower station expansion tank, the top of the box cover 102 is provided with a jacking device 3, the jacking device 3 includes a bending ring plate 301, a cover plate 302 and a top cover 303, the bending ring plate 301 is fixed on the box cover 102, the cover plate 302 is fixed on the top of the bending ring plate 301, and the top cover 303 is sealed on the cover plate 302; the cover plate 302 and the top cover 303 are concave-convex structures, and can form a fit.

[0040] The electric control telescopic rod 304 is fixedly installed below the box cover 102, and the exhaust hole 306 is formed in the inside of the electric control telescopic rod 304; the bottom plate 305 is arranged above the box cover 102, the exhaust hole 306 is blocked by the plug column 312 integrally connected to the bottom plate 305, and the bottom plate 305 is located in the inside of the bending ring plate 301; The upper part of the bottom plate 305 is fixed with a cushion plate 311, the upper part of the cushion plate 311 is placed with a linkage plate 307, both ends of the linkage plate 307 are fixedly installed with top columns 308, one end of the top column 308 penetrates through the cover plate 302 and is located below the top cover 303; When the internal pressure of the box body 101 is too large or needs to be exhausted, the electric control telescopic rod 304 is controlled to make the bottom plate 305 be lifted up, so that the gas enters into the inside of the bent ring plate 301 from the exhaust hole 306; since the bottom plate 305 is lifted up, the positions of the cushion plate 311, the linkage plate 307 and the top column 308 are raised, so that the top column 308 lifts up the top cover 303, and the gas is exhausted through the gas exhaust hole 405 in the cover plate 302.

[0041] Further, in the embodiment, both ends of the top cover 303 are provided with T-shaped rods 309, one end of the T-shaped rod 309 penetrates through the top cover 303 and is fixed on the cover plate 302, and the outside of the T-shaped rod 309 is sleeved with a second spring 310, one end of the second spring 310 is located on the top cover 303, and the other end is located on the T-shaped rod 309.

[0042] The top cover 303 and the T-shaped rod 309 are in sliding connection, when the top cover 303 is normally used, the top cover 303 is tightly sealed on the cover plate 302, when the top cover 303 is lifted up, the second spring 310 is compressed.

[0043] Specifically, when the internal pressure of the box body 101 is too high or needs to be actively exhausted, the electric control telescopic rod 304 is started and lifts up the bottom plate 305 upward, so that the bottom plate 305 is separated from the exhaust hole 306, the gas in the box enters into the inside of the bent ring plate 301 through the exhaust hole 306; the bottom plate 305 drives the cushion plate 311, the linkage plate 307 and the top column 308 to move upward as a whole, the top column 308 lifts up the top cover 303, the second spring 310 is compressed, a gap is formed between the top cover 303 and the cover plate 302, and the gas is immediately exhausted outward through the gas exhaust hole 405 in the cover plate 302, so that the system is depressurized.

[0044] The scheme in the embodiment can be selectively combined with the scheme in other embodiments. Embodiment 3

[0045] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 On the basis of the above-mentioned embodiments, the water level monitoring system of the hydroelectric station expansion tank further comprises a linkage mechanism, the linkage mechanism comprises a lever 4, the lever 4 is fixedly installed at both ends of the bottom plate 305, and both ends of the lever 4 are rotatably provided with rollers, one end of the lever 4 is located below the linkage plate 307, and the other end is located below the horizontal plate part of the bent ring plate 301.

[0046] The top rod 401 is fixedly installed above the linkage plate 307, and one end of the top rod 401 is slidably connected in a limiting groove 406 formed in the inside of the cover plate 302.

[0047] The inside of the cover plate 302 is further provided with a gas vent 405, and the gas vent 405 is sealingly connected with the top cover 303, the sealing cover 402 is clamped between the cover plate 302 and the top cover 303, and the gas vent 405 is blocked.

[0048] When the internal pressure of the box body 101 is too large or needs to be exhausted, the electric control telescopic rod 304 is controlled to lift the bottom plate 305, so that the gas enters the inside of the bent ring plate 301 from the gas vent 406; since the bottom plate 305 is lifted, the position of the gasket 311, the linkage plate 307 and the top column 308 is raised, so that the top column 308 first lifts the top cover 303, and when the top cover 303 is lifted, the second spring 310 is compressed.

[0049] It should be noted that at this time, the top rod 401 is located at the deepest part of the limiting groove 406, the top of the top rod 401 just contacts the sealing cover 402, and the roller at one end of the rocker 4 just contacts the lower part of the horizontal plate part of the bent ring plate 301.

[0050] At this time, the electric control telescopic rod 304 needs to be continuously controlled to be lifted, so that the top column 308 continues to lift the top cover 303, and since the top rod 401 also continues to be lifted, the top rod 401 can lift the sealing cover 402, when the sealing cover 402 is lifted, the gas vent 405 is not blocked, so that the gas in the inside of the bent ring plate 301 is exhausted through the gas vent 405 and the gap between the cover plate 302 and the top cover 303, and side exhaust is performed.

[0051] It should be noted that during the process, since the roller at one end of the rocker 4 is blocked by the horizontal plate part of the bent ring plate 301, the roller at the other end of the rocker 4 can be lifted to further lift the linkage plate 307. Through the arrangement of the rocker 4, the lifting height of the linkage plate 307 is increased, and the overall structure is compact.

[0052] Further, in the embodiment, the inside of the cover plate 302 is further provided with a mounting groove 403, the inside of the mounting groove 403 is provided with a third spring 404, one end of the third spring 404 is fixed in the inside of the mounting groove 403, and the other end of the third spring 404 is fixed with the sealing cover 402. Through the arrangement of the third spring 404, the sealing cover 402 is reset, and the top rod 401 is lifted back into the limiting groove 406 through the sealing cover 402.

[0053] Specifically, when the sealing cover 402 is added, the double sealing is performed with the bottom plate 305, and if the exhaust is needed, the electric control telescopic rod 304 continues to lift the bottom plate 305, drives the one end of the bent rod 4 to rotate and the other end to push the linkage plate 307 to further rise, and at the same time, the top rod 401 fixed on the linkage plate 307 rises along the limiting groove 406 and lifts the sealing cover 402, so that the sealing cover 402 is separated from the exhaust hole 405, the gas is discharged through the exhaust hole 405 and the gap between the cover plate 302 and the top cover 303, and the third spring 404 assists the sealing cover 402 to reset after the exhaust is completed, and the exhaust hole 405 is resealed.

[0054] The scheme in this embodiment can be selectively combined with the scheme in other embodiments.

[0055] The specific use process of the water level monitoring system of the water tank of the hydropower station is as follows: The water level monitoring part: the sliding rod 201 of the liquid level meter 2 is vertically fixed in the box body 101, and the bottom end of the liquid level sleeve 202 outside is provided with the floatable air cushion 203. When the water level in the box body 101 changes, the air cushion 203 drives the liquid level sleeve 202 to slide up and down along the sliding rod 201, and the operator can directly read the water level through the scale on the outer wall of the liquid level sleeve 202.

[0056] At the same time, the scale board 208 at the top of the liquid level sleeve 202 moves synchronously, changes the distance between the fixed distance meter 207 on the bent plate frame 205, the distance meter 207 detects the displacement change in real time and converts it into an electrical signal for uploading, forms a double monitoring mechanism for mutual checking of the scale reading, and ensures the accuracy of the water level data. The sliding rod 201 is elastically installed through the elastic sleeve 204 at the bottom and the first spring 206 at the top, which not only ensures the stability of the structure, but also facilitates maintenance and disassembly.

[0057] The safety pressure relief part: the lifting device 3 above the box cover 102 constitutes the pressure protection mechanism of the system. When the internal pressure of the box body 101 is too high or active exhaust is needed, the electric control telescopic rod 304 is started, the bottom plate 305 is lifted upward, the plug column connected with the bottom plate 305 is separated from the exhaust hole 306, and the high-pressure gas in the box enters the inside of the bent ring plate 301.

[0058] The rising of the bottom plate 305 synchronously drives the base plate 311, the linkage plate 307 and the top column 308 to move upward, the top column 308 lifts the top cover 303 against the elastic force of the second spring 310, a gap is generated between the top cover 303 and the cover plate 302, and the gas is discharged through the exhaust hole 405 in the cover plate 302.

[0059] And, when the sealing cover 402 is added between the cover plate 302 and the top cover 303, the added sealing cover 402 can cooperate with the bottom plate 305 to achieve double sealing, and when exhaust is needed, the sealing cover 402 can be opened by the linkage mechanism such as the rocker lever 4 and the top lever 401, so as to increase the exhaust passage and achieve rapid and effective system pressure relief. After the exhaust is completed, each component is automatically restored to the sealed state under the action of the second spring 310, the third spring 404 and other reset elements.

[0060] It should be noted that, although the above embodiments have been described in the present text, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative idea of the present application, the changes and modifications made to the embodiments described herein, or the equivalent structures, equivalent processes or equivalent function transformations made by using the content of the present application specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, which are all included in the protection scope of the present application patent.

Claims

1. A water level monitoring system for a hydroelectric power station expansion tank, comprising a tank (1), the tank (1) comprising a tank body (101) and a tank cover (102) fixedly mounted on the tank body (101), characterized in that: The box (101) is internally provided with a liquid level gauge (2), the liquid level gauge (2) comprises a sliding rod (201), the sliding rod (201) is externally sleeved with a liquid level sleeve (202), the liquid level sleeve (202) penetrates the box cover (102) and is in sliding connection with the box cover (102), the outer wall of the liquid level sleeve (202) is provided with a liquid level scale, and the bottom end of the liquid level sleeve (202) is fixedly sleeved with an air cushion (203), the air cushion (203) can float on the water surface in the box (101), and the water level depth is displayed through the liquid level scale on the outer wall of the liquid level sleeve (202).

2. The hydroelectric plant expansion tank water level monitoring system of claim 1, wherein: The bottom of the sliding rod (201) is fixedly installed on the bottom wall of the box (101) through an elastic sleeve (204), and the top is fixedly installed on the bent plate frame (205) through a first spring (206).

3. The hydroelectric plant expansion tank water level monitoring system of claim 2, wherein: The bent plate frame (205) is provided as a transparent plate, the vertical plate part is fixed on the box cover (102), the horizontal plate part is fixedly installed with the first spring (206), and the first spring (206) is fixed with the top of the sliding rod (201).

4. The water level monitoring system for a hydroelectric plant expansion tank according to claim 2 or 3, characterized in that: The top of the liquid level sleeve (202) is fixedly installed with a measuring plate (208), and the horizontal plate part of the bent plate frame (205) is fixedly installed with a range finder (207), which is used to measure the displacement between the range finder (207) and the measuring plate (208).

5. The hydroelectric plant expansion tank water level monitoring system of claim 4, wherein: The range finder (207) and the measuring plate (208) are provided as an annular structure, the range finder (207) is sleeved on the outer ring of the first spring (206) and fixed with the horizontal plate part of the bent plate frame (205), and the measuring plate (208) is fixedly sleeved on the top of the liquid level sleeve (202).

6. The hydroelectric plant expansion tank water level monitoring system of claim 1, wherein: The top of the box cover (102) is provided with a jacking device (3), the jacking device (3) comprises a bent ring plate (301), a cover plate (302) and a top cover (303), the bent ring plate (301) is fixed on the box cover (102), the cover plate (302) is fixed on the top of the bent ring plate (301), and the top cover (303) is sealed on the cover plate (302).

7. The hydroelectric plant expansion tank water level monitoring system of claim 6, wherein: A electric control telescopic rod (304) is fixedly installed below the box cover (102), an exhaust hole (306) is formed in the box cover (102), and a bottom plate (305) is arranged above the box cover (102), the exhaust hole (306) is blocked by a plug column (312) integrally connected to the bottom plate (305) and located in the bent ring plate (301).

8. The hydroelectric plant expansion tank water level monitoring system of claim 7, wherein: A cushion plate (311) is fixed above the bottom plate (305), a linkage plate (307) is placed above the cushion plate (311), top columns (308) are fixedly installed at both ends of the linkage plate (307), and one end of each top column (308) penetrates the cover plate (302) and stops below the top cover (303).

9. The hydroelectric plant expansion tank water level monitoring system of claim 8, wherein: T-shaped rods (309) are arranged at both ends of the top cover (303), one end of each T-shaped rod (309) penetrates the top cover (303) and is fixed on the cover plate (302), a second spring (310) is sleeved outside each T-shaped rod (309), one end of each second spring (310) stops on the top cover (303), and the other end stops on the T-shaped rod (309).

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