阅读说明：本技术 一种水电站用漂浮式水位报警装置 (Floating type water level alarm device for hydropower station ) 是由 马明刚 严良平 黄彦庆 王建忠 郑贤喜 程剑林 晁新刚 徐步超 吴刚 周智 叶宇 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种水电站用漂浮式水位报警装置,包括固定在河堤上的测量架体(1),测量架体(1)的表面设有可升降的漂浮组件(4),测量架体(1)内部形成密封腔室,密封腔室内按间隔分布有若干水位报警开关(2),水位报警开关(2)一侧设有转动连接密封腔室的摆杆组件(3),摆杆组件(3)一端与水位报警开关(2)相互接触,摆杆组件(3)端部延伸至密封腔室外侧并与漂浮组件(4)相互接触,摆杆组件(3)和测量架体(1)之间经密封组件(5)相互连接。本发明具有监测稳定性好、报警器不易损坏的特点。(The invention discloses a floating type water level alarm device for a hydropower station, which comprises a measuring frame body (1) fixed on a river levee, wherein a liftable floating assembly (4) is arranged on the surface of the measuring frame body (1), a sealed cavity is formed inside the measuring frame body (1), a plurality of water level alarm switches (2) are distributed in the sealed cavity at intervals, a swing rod assembly (3) rotatably connected with the sealed cavity is arranged on one side of each water level alarm switch (2), one end of each swing rod assembly (3) is in mutual contact with the corresponding water level alarm switch (2), the end part of each swing rod assembly (3) extends to the outer side of the sealed cavity and is in mutual contact with the corresponding floating assembly (4), and the swing rod assemblies (3) are mutually connected with the measuring frame body (1) through the sealed assemblies (. The invention has the characteristics of good monitoring stability and difficult damage of the alarm.)

1. The utility model provides a power station is with floating formula water level alarm device which characterized in that: including fixing measurement support body (1) on the river levee, the surface of measuring support body (1) is equipped with showy subassembly (4) of liftable, measure the inside sealed cavity that forms of support body (1), it has a plurality of water level alarm switch (2) to distribute according to the interval in the sealed cavity, water level alarm switch (2) one side is equipped with pendulum rod subassembly (3) of rotating connection sealed cavity, pendulum rod subassembly (3) one end and water level alarm switch (2) the mutual contact, pendulum rod subassembly (3) tip extend to the sealed cavity outside and with showy subassembly (4) the mutual contact, pendulum rod subassembly (3) and measure between the support body (1) through sealed subassembly (5) interconnect.

2. The floating water level alarm device for the hydropower station according to claim 1, wherein: the swing rod assembly (3) comprises a swing shaft (301) rotatably connected to the measuring frame body (1), a first swing rod (302) is arranged at one end of the swing shaft (301), the other end of the swing shaft (301) extends to the outer side of the sealed chamber and is provided with a second swing rod (303), a pressing surface for pressing the water level alarm switch (2) is arranged at one end of the first swing rod (302), a bending block (304) is arranged at the other end of the first swing rod (302), and the second swing rod (303) is in mutual contact with the floating assembly (4); the side wall of the measuring frame body (1) is provided with blocking surfaces (101) positioned on two sides of the end part of the first swing rod (302), and the inner side of each blocking surface (101) is provided with a concave surface (102) buckled with the bending block (304).

3. The floating water level alarm device for the hydropower station according to claim 2, wherein: sealing assembly (5) include flange (501), flange (501) outside and measure support body (1) fine thread connection, flange (501) inside with the outer wall of swing axle (301) laminate completely, flange (501) tip and measure and be equipped with between support body (1) sealing washer (502), the inner ring of sealing washer (502) laminates with the outer wall of swing axle (301) each other.

4. The floating water level alarm device for the hydropower station according to claim 2, wherein: the floating assembly (4) comprises a lifting plate (401), the left side and the right side of the lifting plate (401) are connected with the measuring frame body (1) in a sliding mode, collision blocks (402) which collide with the second swing rods (303) are arranged on the inner side of the lifting plate (401), and floating balls (403) located on the surface of a water body are connected to the outer side of the lifting plate (401) in a rotating mode.

5. The floating water level alarm device for the hydropower station according to claim 4, wherein: one end, close to the collision block (402), of the second swing rod (303) is provided with a metal elastic sheet (305), and the metal elastic sheet (305) interferes with the collision block (402) along the length direction of the measuring frame body (1).

6. The floating water level alarm device for the hydropower station according to claim 4, wherein: floater (403) rotate along vertical direction through dwang (404) and connect on lifter plate (401), and the tip of dwang (404) is equipped with bulge (405), be equipped with on lifter plate (401) and form spacing stopper (406) to the tip of dwang (404), stopper (406) are located the upper and lower both sides of stopper (406) respectively.

7. The floating water level alarm device for the hydropower station according to claim 6, wherein: the rotating angle of the rotating rod (404) is 20-30 degrees.

8. The floating water level alarm device for the hydropower station according to claim 1, wherein: the water level alarm switch (2) comprises a button switch matched with the swing rod assembly (3), and the button switch extends to the top of the measuring frame body (1) through a connecting circuit and is connected with a water level alarm.

Technical Field

The invention relates to a water level alarm device, in particular to a floating water level alarm device for a hydropower station.

Background

The water level difference between the upstream water inlet section and the downstream tail water inlet section of the hydropower station is an important parameter for adjusting the operation of a water turbine in the hydropower station, and when the water level is too high or a flood peak comes, if no stable water level monitoring system carries out early warning, serious safety problems can be caused to a dam. Due to the characteristics of large depth and complex operation environment of a water body monitored by a hydropower station, a sensor of the hydropower station is easily influenced by rainstorm, flooding or water flow with high flow rate, and the monitoring precision of the hydropower station is seriously reduced; and along with the lengthening of the operation time, the accuracy, the stability and the detection precision of the sensor are also reduced. Therefore, most conventional liquid level meters on the market hardly meet the requirements of hydropower stations on high stability requirements and long monitoring periods of liquid level monitoring mechanisms.

According to the traditional hydropower station monitoring method, a person periodically goes to a measurement site to obtain water level information by using a water level rod, but the required measurement positions are respectively positioned at the upstream and the downstream of a water body, so that the method has the problems of low monitoring efficiency and labor consumption, and the conventional hydropower station gradually replaces manual monitoring by an automatic water level alarm device. The water level alarm device is provided with a plurality of alarms in sequence, and wiring terminals of the alarms are arranged in water bodies with different heights; when the water level rises, the end of the butt joint wire is immersed and the circuit is conducted, so that the alarm gives an alarm after the passage. And the water level monitoring at different heights is realized by utilizing the wiring terminals at different heights.

However, the water level alarm device can cause the wiring terminal of the water level alarm device to be soaked in water for a long time, so that the water body can continuously corrode and scour the wiring terminal after soaking, the phenomenon of failure or damage is easy to occur, the stability is low, and the water level alarm device needs to be maintained and replaced regularly. In addition, the water level can cause the water level to float up and down when the water level rises and falls, and when the water level is at a critical position with the wiring terminal, the floating state can cause frequent fluctuation between connection and disconnection of the alarm. Aiming at the phenomenon, the conventional alarm device only adopts a conventional first-order lag filtering algorithm to overcome periodic interference caused by high-frequency fluctuation; however, the filtering algorithm has the problems of long sampling period and low sensitivity, once the water level height is changed in a short time and in a large range, the system is difficult to react quickly and give an alarm, and instantaneity and accuracy of the alarm device in the monitoring process are reduced.

Therefore, the existing water level alarm device for monitoring the water level has the problems of poor monitoring stability and easy damage of an alarm.

Disclosure of Invention

The invention aims to provide a floating type water level alarm device for a hydropower station. The monitoring device has the characteristics of good monitoring stability and difficult damage of the alarm.

The technical scheme of the invention is as follows: the utility model provides a power station is with floating formula water level alarm device, including fixing the measurement support body on the river levee, the surface of measuring the support body is equipped with the showy subassembly of liftable, measure the inside sealed cavity that forms of support body, it has a plurality of water level alarm switch to distribute according to the interval in the sealed cavity, water level alarm switch one side is equipped with the pendulum rod subassembly of rotating connection sealed cavity, pendulum rod subassembly one end and water level alarm switch contact each other, pendulum rod subassembly tip extends to the sealed cavity outside and with showy subassembly contact each other, through sealed subassembly interconnect between pendulum rod subassembly and the measurement support body.

In the floating water level alarm device for the hydropower station, the swing rod assembly comprises a swing shaft which is rotatably connected to the measuring frame body, a first swing rod is arranged at one end of the swing shaft, the other end of the swing shaft extends to the outer side of the sealed cavity and is provided with a second swing rod, a press-fit surface which presses the water level alarm switch is arranged at one end of the first swing rod, a bending block is arranged at the other end of the first swing rod, and the second swing rod is in contact with the floating assembly; the side wall of the measuring frame body is provided with blocking surfaces positioned on two sides of the end part of the first swing rod, and the inner side of each blocking surface is provided with a concave surface buckled with the bending block.

In the floating water level alarm device for the hydropower station, the sealing assembly comprises a connecting flange, the outer part of the connecting flange is in threaded connection with the fine teeth of the measuring frame body, the inner part of the connecting flange is completely attached to the outer wall of the oscillating shaft, a sealing ring is arranged between the end part of the connecting flange and the measuring frame body, and the inner ring of the sealing ring is attached to the outer wall of the oscillating shaft.

In the floating water level alarm device for the hydropower station, the floating assembly comprises a lifting plate, the left side and the right side of the lifting plate are slidably connected with the measuring frame body, the inner side of the lifting plate is provided with a collision block which collides with the second swing rod, and the outer side of the lifting plate is rotatably connected with a floating ball positioned on the surface of a water body.

In the floating water level alarm device for the hydropower station, a metal elastic sheet is arranged at one end, close to the collision block, of the second swing rod, and the metal elastic sheet interferes with the collision block along the length direction of the measuring frame body.

In the aforementioned floating type water level alarm device for hydropower station, the floating ball is connected to the lifting plate through the rotating rod along the vertical direction, the end part of the rotating rod is provided with the protruding part, the lifting plate is provided with the limiting stopper for the end part of the rotating rod, and the limiting stopper is respectively positioned at the upper side and the lower side of the limiting stopper.

In the floating water level alarm device for a hydropower station, the rotation angle of the rotating rod is 20 to 30 degrees.

In the floating type water level alarm device for the hydropower station, the water level alarm switch comprises a button switch matched with the swing rod assembly, and the button switch extends to the top of the measuring frame body through a connecting circuit and is connected with a water level alarm.

Compared with the prior art, the invention has the following characteristics:

(1) the water level alarm switch can effectively prevent the water level alarm switch from directly contacting with a water body, so that the working stability and the service life of the water level alarm switch are improved; meanwhile, the swing rod assembly and the floating assembly are mechanically linked to complete the opening and closing actions of the water level alarm switch, so that the problem of faults caused after the electric element is soaked by water is avoided, the overall monitoring stability is improved, and the service life is prolonged; meanwhile, the influence of the sensitivity of the sensor on the alarm accuracy can be reduced by triggering the water level alarm switch through a mechanical structure, so that the monitoring stability of the water level alarm switch can be ensured in a complete monitoring period;

(2) according to the invention, through the structural cooperation of the swing rod component, the free rotation of the swing shaft caused by the flow and fluctuation of the external water body can be avoided, so that the interference of the water level height to the structure of the linkage in the processes of large-scale lifting and flowing is reduced, and the pressing stability of the swing rod component to the water level alarm switch is improved;

(3) the sealing assembly is matched to achieve a good sealing and waterproof effect, so that moisture is prevented from entering the sealed cavity from a gap, and the water-resisting effect and the stability of the water level alarm switch are improved;

(4) the floating ball can lift and rotate within a small angle due to the structural coordination of the floating assembly, so that the floating ball cannot touch a frequent switch of the water level alarm device in the process of fluctuating along with the water surface, the monitoring stability of the water level is further improved, the use loss of the water level alarm device under the frequent switch is reduced, and the service life of the water level alarm device is prolonged; compared with the conventional filtering algorithm, the filtering method realized by using the mechanical structure does not generate the problems of delayed alarm and reduced sensitivity, can quickly react to the high-frequency fluctuation and short-term large-scale lifting of the water body, overcomes the limitations of the filtering algorithm and the interference caused by complex weather conditions, and further improves the accuracy and instantaneity of the invention for monitoring the water level;

(5) the invention completes the rotation of the swing shaft by shifting the metal elastic sheet, so that the lifting plate can keep a stable switch on the water level alarm device in the repeated lifting process, thereby ensuring the monitoring effect of the invention;

therefore, the invention has the characteristics of good monitoring stability and difficult damage of the alarm.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the line A of FIG. 1;

FIG. 3 is a schematic structural view of a first swing link and a push button switch;

FIG. 4 is a schematic structural view of an impact mass and a second rocker;

fig. 5 is a schematic structural view of the seal assembly.

The labels in the figures are: 1-a measuring frame body, 2-a water level alarm switch, 3-a swing rod assembly, 4-a floating assembly, 5-a sealing assembly, 101-a blocking surface, 102-a concave surface, 301-a swing shaft, 302-a first swing rod, 303-a second swing rod, 304-a bending block, 305-a metal elastic sheet, 401-a lifting plate, 402-an impact block, 403-a floating ball, 404-a rotating rod, 405-a convex part, 406-a limiting block, 501-a connecting flange and 502-a sealing ring.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.