A hydraulically activated metal-air battery water level alarm device and alarm method

Abstract

The present invention relates to a hydraulically activated metal-air battery water level alarm device and an alarm method. The device comprises a float valve, a metal-air battery pack, a liquid storage tank, an alarm component and a carrying box; the carrying box is used to accommodate the float valve, the metal-air battery pack and at least a part of the liquid storage tank inside; the liquid inlet of the float valve is connected with the liquid outlet of the liquid storage tank; the liquid outlet of the float valve is connected with the metal-air battery pack; the liquid storage tank is filled with metal-air battery electrolyte; the metal-air battery pack is electrically connected to the alarm component; when the water level rises to a predetermined height, the liquid inlet of the float valve is opened, and the metal-air battery electrolyte in the liquid storage tank enters the float valve through the liquid inlet of the float valve, and then enters the metal-air battery pack through the liquid outlet of the float valve, activating the metal-air battery pack, so that the metal-air battery pack supplies power to the alarm component, causing the alarm component to alarm.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring equipment, and in particular to a hydraulically activated metal-air battery water level alarm device and an alarm method. Background Art

[0002] The water level monitoring system is an important means to grasp the changes in water conditions in real time, scientifically warn of flood disasters, improve flood control command capabilities, and reduce losses from rain and flood disasters. Through the water level monitoring system, real-time monitoring and automated management of water conditions are achieved. Information such as water level, flow rate, and water quality can be grasped at any time, providing timely and comprehensive data support for flood control and prevention work, and protecting the lives and property of people along the river.

[0003] At present, there are many types of water level alarms at home and abroad, but most of them have single functions, large size, high cost, inconvenient maintenance and repair, and prone to failure. The relevant water level alarm is powered by solar energy, but solar energy is greatly affected by weather factors, so a well-designed water level alarm is needed to monitor water level changes in real time.

[0004] Metal-air batteries generate electricity by consuming metal anodes and oxygen in the atmosphere. They are green, environmentally friendly, low-cost, and long-lasting. The electrolyte used in the battery is an aqueous salt solution, making it one of the best choices as a power supply for water level alarms.

[0005] In the prior art, a Chinese patent document with application number CN201520185658.4 discloses a water level alarm device, which comprises a two-stage telescopic rod for high and low water level alarm devices installed on a frame, and sensors are installed at the bottom ends of the telescopic rods. The frame is a hollow tube, and a power supply device, a controller for processing sensing signals and transmitting response signals, and a wireless signal transmitting device for transmitting signals are installed inside. When the water level rises to the low water level line and the high water level line, the alarm device sends a signal respectively. The device has a simple structure and good performance, and can promptly remind the current water level situation, thereby reducing the workload of the staff. However, the power supply of the alarm device needs to be replaced and tested in time, and its stability is difficult to guarantee.

[0006] The Chinese patent document with application number CN202120079570.X discloses a river water level alarm device, which is provided with a crossbar on the plug rod, a monitoring unit is provided in the monitoring tube at both ends of the crossbar, a sliding device is installed on the float in the monitoring tube, a push rod is provided on the top of the float, a spring seat is installed on the top of the push rod, a strain gauge is provided on the spring seat, and a controller is connected to the strain gauge. When the water level rises, the float drives the push rod to compress the spring, and after touching the strain gauge, the signal is transmitted to the controller, thereby triggering the alarm device; however, the power supply required for the device is solar-powered, and the power supply is greatly affected by weather changes; in addition, the vertical rod structure must consider the influence of wind force, and the stability is insufficient.

[0007] The Chinese patent document with application number CN202120847367.2 discloses a metal-air battery water level alarm, which is provided with a filter device at the bottom of the metal-air battery, and the metal-air battery is arranged in a circular shape above the filter device, and a control circuit and an alarm device are provided above the metal-air battery. When the water level rises to the metal-air battery chamber, the battery is triggered, and the buzzer alarms, the signal light flashes, and the signal is transmitted to the control room through a wireless signal transmission device. A liquid outlet is left at the upper end of the battery in the alarm. At this time, the water entering the chamber dilutes the pre-stored solid salt. As the water level rises, the electrolyte containing salt flows out of the battery chamber. Therefore, the alarm device is suitable for short-term alarms, and the signal is unstable due to the influence of the current electrolyte concentration. Summary of the invention

[0008] The present invention aims to provide a hydraulically activated metal-air battery water level alarm device and an alarm method. The technical problems to be solved include how to use the metal-air battery as a starting power source for the alarm device and keep the signal stable.

[0009] The purpose of the present invention is to solve the deficiencies of the prior art and provide a hydraulically activated metal-air battery water level alarm device, comprising a float valve, a metal-air battery pack, a liquid storage tank, an alarm assembly and a carrying box; the carrying box is used to accommodate at least a part of the float valve, the metal-air battery pack and the liquid storage tank inside; the liquid inlet of the float valve is connected to the liquid outlet of the liquid storage tank; the liquid outlet of the float valve is connected to the metal-air battery pack; the liquid storage tank is filled with metal-air battery electrolyte; the metal-air battery pack is electrically connected to the alarm assembly; when the water level rises to a predetermined height, the liquid inlet of the float valve is opened, and the metal-air battery electrolyte in the liquid storage tank enters the float valve through the liquid inlet of the float valve, and then enters the metal-air battery pack through the liquid outlet of the float valve, activating the metal-air battery pack, so that the metal-air battery pack supplies power to the alarm assembly, causing the alarm assembly to alarm.

[0010] Specifically, the float valve is composed of a float push rod, a connecting rod, a pressure spring, a sleeve, a protective sleeve, a liquid inlet and a liquid outlet; a float is fixed at the bottom of the float push rod, and a clamping plate is arranged on the top of the float push rod, and the top of the clamping plate is fixedly connected to the connecting rod; the float push rod is installed inside the protective sleeve, and the connecting rod is installed inside the sleeve, and the sleeve comprises a first barrel cavity and a second barrel cavity; the first barrel cavity and the second barrel cavity are separated by a sleeve partition wall; a through hole is arranged in the center of the sleeve partition wall, and the connecting rod passes through the through hole; a valve plate is arranged on the top of the connecting rod; the valve plate is located above the liquid inlet; the liquid inlet is arranged at the top of the first barrel cavity; the clamping plate and the pressure spring are arranged inside the second barrel cavity; an annular edge and a center hole surrounded by the annular edge are arranged on the bottom wall of the second barrel cavity, and the float push rod can pass through the center hole and enter the second barrel cavity The pressure spring is sleeved on the connecting rod and is located above the upper surface of the card plate; the lower surface of the card plate is arranged above the annular edge; the liquid outlet is arranged on the side wall of the first barrel cavity; when the water level is below a predetermined height, under the action of the spring force of the pressure spring, the lower surface of the card plate is sealed with the upper surface of the annular edge; the lower surface of the valve plate is sealed with the liquid inlet; when the water level rises to a predetermined height, the float drives the float push rod to rise under the action of the hydraulic force, so that the card plate compresses the pressure spring, and at the same time drives the connecting rod and the valve plate to rise, thereby opening the liquid inlet of the float valve, so that the metal-air battery electrolyte in the liquid storage tank enters the first barrel cavity of the float valve through the liquid inlet of the float valve, and then enters the metal-air battery pack through the liquid outlet of the float valve, activating the metal-air battery pack.

[0011] Preferably, the bottom of the metal-air battery pack is composed of a plurality of groups of metal-air single cells connected in series; the metal-air single cells are composed of a shell and an air cathode, and the bottoms of the metal-air single cells are connected to each other by an infusion tube; the liquid inlet of the infusion tube is connected to the liquid outlet of the float valve; the metal-air battery pack is installed inside the battery shell; the cavity of the battery shell is provided with an air inlet hole, and the bottom of the battery shell is provided with a single cell fixing groove; the top of the metal-air battery pack includes a metal anode, a metal anode fixing plate, a positive electrode column, a negative electrode column and a control circuit; the metal anode is installed at the lower end of the metal anode fixing plate and is connected and fixed to the negative electrode column; the positive and negative electrode columns are arranged at the upper end of the metal anode fixing plate, and the positive electrode column and the negative electrode column are connected to each other by a conductive sheet; the control circuit is arranged above the positive and negative electrode columns, the input port of the control circuit is connected to the positive and negative electrode columns of the battery pack, and the control circuit is also electrically connected to the alarm component.

[0012] Preferably, the metal anode comprises magnesium, magnesium alloy, aluminum, aluminum alloy, zinc and / or zinc alloy.

[0013] Preferably, the liquid storage tank is arranged at the upper end of the float valve, and the liquid outlet of the liquid storage tank is connected to the liquid inlet of the float valve; a fixed amount of metal-air battery electrolyte is stored in the liquid storage tank; the liquid storage tank ensures that the metal-air battery electrolyte is not leaked, evaporated or frozen due to environmental factors.

[0014] Preferably, the metal-air battery electrolyte comprises a salt solution and / or an alkaline solution.

[0015] Preferably, the output end of the control circuit is connected to a buzzer and a signal light; the control circuit adjusts the electrical signal according to the change of the water level, thereby controlling the magnitude of the output current and regulating the decibel of the buzzer.

[0016] Preferably, the alarm component also includes a positioning chip and a wireless signal transmission device; the positioning chip, wireless signal transmission device, buzzer and flash light are connected to the control circuit in parallel; the positioning chip includes Beidou and / or GPS navigation positioning chip; the wireless signal transmission device includes GPRS / CDMA wireless communication, digital radio communication, microwave communication and / or satellite communication.

[0017] Preferably, the carrying box is a stepped square box, a liquid storage tank, a float valve and a metal-air battery pack are arranged inside the carrying box, and a wireless signal transmission antenna is arranged outside the carrying box; a connecting piece is provided on the outer end surface of the carrying box on the side close to the metal-air battery pack, a buzzer sound hole is provided on the upper side of the metal-air battery pack, and a protective sleeve for protecting the float push rod is provided at the lower end of the carrying box close to the float valve; a support arm is installed on the protective sleeve, and a connecting plate is provided at the other end of the support arm.

[0018] The present invention also provides an alarm method of a hydraulically activated metal-air battery water level alarm device, comprising the following steps:

[0019] Step 1: As the water level rises and reaches the float position, the float starts to drive the float push rod to move upward;

[0020] Step 2: When the water level rises to a predetermined height, the float drives the float push rod and the connecting rod to move upward to overcome its own gravity and the spring force of the pressure spring. At this time, the valve plate at the top of the connecting rod opens, thereby opening the liquid inlet of the float valve. The metal-air battery electrolyte flows into the first cylinder cavity of the float valve through the liquid inlet of the float valve, and enters the metal-air battery pack through the liquid outlet of the float valve, thereby activating the metal-air battery pack.

[0021] Step 3: After the metal-air battery pack is activated, it supplies power to the alarm device. The buzzer on the alarm device starts working and transmits the signal to the central control room.

[0022] Beneficial Effects

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The hydraulically activated metal-air battery water level alarm device of the present invention stores the metal-air battery and the metal-air battery electrolyte separately, uses the buoyancy of water as a drive, turns on the switch of the injection chamber, and thus activates the battery to start the alarm device working. The metal-air battery water level alarm device of the present invention has a reliable structure, stable battery output, simple maintenance, rapid response, and long-term storage, and can be used for water level monitoring in places such as rivers, reservoirs, and dams. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the specific implementation methods of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0026] Figure 1 It is a structural schematic diagram of the hydraulically activated metal-air battery water level alarm device of the present invention.

[0027] Figure 2 It is a cross-sectional view of the hydraulically activated metal-air battery water level alarm device of the present invention.

[0028] Wherein: 1. float valve; 2. metal-air battery pack; 3. liquid storage tank; 4. alarm assembly; 5. carrying box; 1-1. float push rod; 1-2. pressure spring; 1-3. sleeve; 1-4. connecting rod; 1-5. liquid inlet of float valve; 1-6. liquid outlet of float valve; 1-7. protective sleeve; 1-8. valve plate; 1-9. first cylinder cavity; 1-10. second cylinder cavity; 1-11. sleeve partition; 1-12. card plate; 1-13. annular edge; 2-1. infusion tube; 2-2. metal anode; 2-3. air cathode; 2-4. negative pole; 2-5. positive pole; 2-6. control circuit; 3-1 liquid outlet of liquid storage tank; 3-2. metal-air battery electrolyte; 5-1. body of carrying box; 5-2 connecting piece; 5-3. support arm. DETAILED DESCRIPTION

[0029] The present invention is described in more detail hereinafter to facilitate understanding of the present invention.

[0030] like Figure 1 to Figure 2As shown, the hydraulically activated metal-air battery water level alarm device of the present invention comprises a float valve 1, a metal-air battery pack 2, a liquid storage tank 3, an alarm component 4 and a carrying box 5; the carrying box 5 is used to accommodate the float valve 1, the metal-air battery pack 2 and at least a part of the liquid storage tank 3 inside; the liquid inlet 1-5 of the float valve 1 is connected to the liquid outlet 3-1 of the liquid storage tank 3; the liquid outlet 1-6 of the float valve 1 is connected to the metal-air battery pack 2; the liquid storage tank 3 is filled with metal-air battery electrolyte ; The metal-air battery pack 2 is electrically connected to the alarm component 4; when the water level rises to a predetermined height, the liquid inlet 1-5 of the float valve 1 is opened, and the metal-air battery electrolyte in the liquid storage tank 3 enters the float valve 1 through the liquid inlet 1-5 of the float valve 1, and then enters the metal-air battery pack 2 through the liquid outlet 1-6 of the float valve 1, activating the metal-air battery pack 2, so that the metal-air battery pack 2 supplies power to the alarm component 4, causing the alarm component 4 to alarm.

[0031] Specifically, the float valve is composed of a float push rod 1-1, a connecting rod 1-4, a pressure spring 1-2, a sleeve 1-3, a protective sleeve 1-7, a liquid inlet 1-5 and a liquid outlet 1-6; a float is fixed at the bottom of the float push rod, a clamping plate 1-12 is provided on the top of the float push rod 1-1, and the top of the clamping plate is fixedly connected to the connecting rod 1-4; the float push rod 1-1 is installed inside the protective sleeve 1-7, and the connecting rod 1-4 is installed inside the sleeve 1-3, and the sleeve 1-3 includes a first cylinder cavity 1-9 and a second cylinder cavity 1-10; the first cylinder cavity 1-9 and the second cylinder cavity 1-10 are connected to each other. The connecting rod 1-4 is separated from the first cylinder cavity 1-9 by a sleeve partition 1-11; a through hole is provided in the center of the sleeve partition 1-11, and the connecting rod 1-4 passes through the through hole; a valve plate 1-8 is provided on the top of the connecting rod 1-4; the valve plate 1-8 is located above the liquid inlet 1-5; the liquid inlet 1-5 is provided at the top of the first cylinder cavity 1-9; the clamping plate 1-12 and the pressure spring 1-2 are provided inside the second cylinder cavity 1-10; the bottom wall of the second cylinder cavity 1-10 is provided with an annular edge 1-13 and a center hole surrounded by the annular edge, and the float push rod 1-1 can pass through The connecting rod 1-4 is provided with a pressure spring 1-2 and is located above the upper surface of the card plate 1-12; the lower surface of the card plate 1-12 is arranged above the annular edge 1-13; the liquid outlet 1-6 is arranged on the side wall of the first cylinder cavity 1-9; when the water level is below the predetermined height, under the action of the spring force of the pressure spring, the lower surface of the card plate 1-12 is combined and sealed with the upper surface of the annular edge 1-13; the lower surface of the valve plate 1-8 is combined with the liquid inlet 1-5 Close the seal; when the water level rises to a predetermined height, the float drives the float push rod 1-1 to rise under the action of water force, so that the clamping plate 1-12 compresses the pressure spring 1-2, and at the same time drives the connecting rod 1-4 and the valve plate 1-8 to rise, thereby opening the liquid inlet 1-5 of the float valve 1, so that the metal-air battery electrolyte in the liquid storage tank 3 enters the first cylinder cavity 1-9 of the float valve 1 through the liquid inlet 1-5 of the float valve 1, and then enters the metal-air battery pack 2 through the liquid outlet 1-6 of the float valve 1, activating the metal-air battery pack 2.

[0032] The metal-air battery pack is mainly composed of two parts. The bottom of the metal-air battery pack is mainly composed of multiple groups of metal-air single cells connected in series. The metal-air single cell is composed of a shell and an air cathode. The bottoms of the metal-air single cells are connected to each other by an infusion tube. The inlet of the infusion tube is connected to the outlet of the float valve. The metal-air battery pack is installed inside the battery shell. The cavity of the battery shell is provided with an air inlet hole, and the bottom of the battery shell is provided with a single cell fixing groove. The top of the metal-air battery pack includes a metal anode, a metal anode fixing plate, a positive pole, a negative pole and a control circuit. The metal anode is installed at the lower end of the metal anode fixing plate and connected and fixed to the negative pole. The positive and negative poles are arranged at the upper end of the metal anode fixing plate, and the positive pole and the negative pole are connected to each other through a conductive sheet. The control circuit is arranged above the positive and negative poles, and the input port of the control circuit is connected to the positive and negative poles of the battery pack. The metal anode includes but is not limited to magnesium and magnesium alloys, aluminum and aluminum alloys, zinc and zinc alloys.

[0033] Specifically, the metal-air battery pack 2 is arranged on one side of the float valve. The metal-air battery pack is mainly composed of two parts, the lower part of the metal-air battery pack is a battery pack composed of 6 groups of single cells connected in series; the single cells are mainly composed of a battery shell and an air cathode 2-3; the lower parts of the single cells are interconnected through an infusion tube 2-1, and the liquid inlet of the infusion tube 2-1 is connected to the liquid outlet 1-6 of the float valve 1; the metal-air battery pack is fixedly installed in the battery shell, the cavity of the battery shell is provided with an air intake hole, and the bottom of the battery shell is provided with a single cell fixing groove. The upper part of the metal-air battery pack is mainly composed of a metal anode 2-2, a metal anode fixing plate, a positive electrode column 2-5, a negative electrode column 2-4 and a control circuit 2-6; the metal anode 2-2 is fixed to the lower end of the metal anode fixing plate and connected and fixed to the negative electrode column 2-4; the positive electrode column 2-5 is arranged at the upper end of the metal anode fixing plate, and the positive electrode column and the negative electrode column are connected to each other through a conductive sheet; when installed, the positive electrode column 2-5 and the lower air cathode 2-3 current collector are connected (the current collector is the air cathode A part of the battery is a metal conductive sheet, which can be a metal material with high conductivity and corrosion resistance such as nickel or copper-plated nickel. The current circuit can only be conducted after the positive electrode column of the battery upper shell and the metal current collector of the air cathode are connected); the positive electrode column and the negative electrode column are connected in series through a conductive sheet on the upper end surface of the metal anode fixing plate, and a control circuit 2-6 is arranged on the upper part of the positive electrode column and the negative electrode column, and the input port of the control circuit is connected to the positive electrode column and the negative electrode column of the metal-air battery pack; the control circuit is also electrically connected to the alarm component 4.

[0034] The liquid storage tank is arranged at the upper end of the float valve, and the liquid outlet of the liquid storage tank is connected to the liquid inlet of the float valve; a fixed amount of metal-air battery electrolyte is stored in the liquid storage tank; the liquid storage device ensures that the metal-air battery electrolyte is not leaked, evaporated or frozen due to environmental factors; the metal-air battery electrolyte includes but is not limited to salt solution and alkaline solution.

[0035] Specifically, the liquid storage tank 3 is arranged above the liquid inlet 1-5 of the float valve 1, and the liquid outlet 3-1 of the liquid storage tank is connected to the liquid inlet 1-5 of the float valve; a liquid injection port is arranged above the liquid storage tank, and a liquid injection valve is arranged on the liquid injection port. After the liquid storage tank is installed above the float valve, the liquid injection valve is opened to inject the metal-air battery electrolyte 3-2 into the liquid storage tank. The content of the metal-air battery electrolyte 3-2 in the liquid storage tank is fixed, and the metal-air battery electrolyte 3-2 in the liquid storage tank can be stored for a long time without being affected by environmental factors to cause leakage, evaporation and failure.

[0036] The output end of the control circuit is connected to a buzzer and a signal light; the control circuit adjusts the electrical signal according to the change of the water level, thereby controlling the magnitude of the output current and regulating the decibel of the buzzer.

[0037] Specifically, the alarm component 4 is composed of a buzzer and a wireless signal transmission device. The alarm component is installed on the output end of the control circuit of the metal-air battery pack, and the decibel of the buzzer and the frequency of wireless signal transmission are regulated by the change of electric quantity.

[0038] In a preferred embodiment, the alarm component also includes a positioning chip and a wireless signal transmission device; the positioning chip, wireless signal transmission device, buzzer and flash light are connected to the control circuit in parallel; the positioning chip includes but is not limited to Beidou and GPS navigation positioning chips; the wireless signal transmission device includes but is not limited to GPRS / CDMA wireless communication, digital radio communication, microwave communication and satellite communication.

[0039] The carrying box is a stepped square box, and a liquid storage tank, a float valve and a metal-air battery pack are arranged inside the carrying box, and a wireless signal transmission antenna is arranged outside the carrying box. The carrying box is provided with a connecting piece on the outer end surface of the side close to the metal-air battery pack, a buzzer sound hole is provided on the upper side of the metal-air battery pack, and a protective sleeve for protecting the float push rod is provided at the lower end of the carrying box close to the float valve; a support arm is installed on the protective sleeve, and a connecting plate is provided at the other end of the support arm.

[0040] Specifically, the carrying box 5 is a stepped square box, and the box body 5-1 of the carrying box is provided with a connecting piece 5-2 on the outer end surface of one side close to the metal-air battery pack 2, and a hole is provided on the connecting piece to facilitate the installation of the alarm device (the connecting piece here is similar to a metal hinge, and the overall alarm device is fixed on a stone pier or similar object with a water level gauge on a dam, river, reservoir, etc. by bolting or hinged connection); the lower part of the box body of the carrying box close to the float valve is provided with a protective sleeve 1-7 of the float push rod, which avoids false alarms caused by interference of other non-aqueous fluids on the float push rod, and the float push rod can move up and down inside the protective sleeve; in order to strengthen the support, a support arm 5-3 is installed on the outside of the protective sleeve 1-7, one end of the support arm 5-3 is fixed on the protective sleeve 1-7, and the other end is provided with a connecting plate for fixed installation. The float push rod mainly includes a float device and a cylindrical push rod, and the alarm water level is determined by setting the movable distance between the float and the lower end of the protective sleeve.

[0041] The metal-air battery water level alarm device in the embodiment of the present invention is used as follows:

[0042] (1) As the water level rises and reaches the float position, the float begins to drive the float push rod to move upward;

[0043] (2) When the water level rises to a certain height, the float drives the float push rod and the connecting rod to move upward to overcome its own gravity and the spring force of the pressure spring. At this time, the sealing platform (i.e., the valve plate) on the top of the connecting rod opens, thereby opening the liquid inlet of the float valve. The metal-air battery electrolyte flows into the first cylinder cavity of the float valve through the liquid inlet of the float valve, and enters the metal-air battery pack through the liquid outlet of the float valve, thereby activating the metal-air battery pack.

[0044] (3) After the metal-air battery pack is activated, it supplies power to the alarm device, the buzzer on the alarm device starts working, and transmits the signal to the central control room.

[0045] The hydraulically activated metal-air battery water level alarm device of the present invention uses the buoyancy of water to activate the valve of the liquid storage tank, so that the metal-air battery electrolyte in the liquid storage tank enters the metal-air battery group, activates the metal-air battery group to discharge, and then supplies power to the alarm component. The present invention adopts a hydraulically controlled water valve to achieve the separation and storage of battery electrolyte and positive and negative electrodes, which can be stored for a long time, has a rapid response, is stable and reliable, and provides a reference for water level monitoring of rivers, lakes and seas.

[0046] The above describes the preferred embodiments of the present invention, but it is not intended to limit the present invention. Those skilled in the art may make improvements and changes to the embodiments disclosed herein without departing from the scope and spirit of the present invention.

Claims

1. A hydraulically activated metal-air battery water level alarm device, characterized in that: The hydraulically activated metal-air battery water level alarm device comprises a float valve, a metal-air battery pack, a liquid storage tank, an alarm assembly and a carrying box; the carrying box is used to accommodate at least a portion of the float valve, the metal-air battery pack and the liquid storage tank inside; the liquid inlet of the float valve is connected to the liquid outlet of the liquid storage tank; the liquid outlet of the float valve is connected to the metal-air battery pack; the liquid storage tank contains metal-air battery electrolyte; the metal-air battery pack is electrically connected to the alarm assembly; when the water level rises to a predetermined height, the liquid inlet of the float valve is opened, and the metal-air battery electrolyte in the liquid storage tank passes through the liquid inlet of the float valve Enter the float valve, and then enter the metal-air battery pack through the liquid outlet of the float valve, activate the metal-air battery pack, so that the metal-air battery pack supplies power to the alarm component, causing the alarm component to alarm; the float valve is composed of a float push rod, a connecting rod, a pressure spring, a sleeve, a protective sleeve, and a liquid inlet and a liquid outlet; a float is fixed at the bottom of the float push rod, and a clamping plate is provided on the top of the float push rod, and the top of the clamping plate is fixedly connected to the connecting rod; the float push rod is installed inside the protective sleeve, and the connecting rod is installed inside the sleeve, and the sleeve includes a first cylinder cavity and a second cylinder cavity; the first cylinder cavity and the second cylinder cavity are separated by a sleeve partition wall; A through hole is provided in the center of the bulkhead of the sleeve, and the connecting rod passes through the through hole; a valve plate is provided on the top of the connecting rod; the valve plate is located above the liquid inlet; the liquid inlet is provided at the top of the first barrel cavity; the clamping plate and the pressure spring are provided inside the second barrel cavity; an annular edge and a center hole surrounded by the annular edge are provided on the bottom wall of the second barrel cavity, and the float push rod can pass through the center hole and move up and down in the second barrel cavity; the pressure spring is sleeved on the connecting rod and is located above the upper surface of the clamping plate; the lower surface of the clamping plate is provided above the annular edge; the liquid outlet is provided on the side wall of the first barrel cavity ; When the water level is below a predetermined height, under the action of the spring force of the pressure spring, the lower surface of the card plate is sealed with the upper surface of the annular edge; the lower surface of the valve plate is sealed with the liquid inlet; when the water level rises to a predetermined height, the float drives the float push rod to rise under the action of the hydraulic force, so that the card plate compresses the pressure spring, and at the same time drives the connecting rod and the valve plate to rise, thereby opening the liquid inlet of the float valve, so that the metal-air battery electrolyte in the liquid storage tank enters the first cylinder cavity of the float valve through the liquid inlet of the float valve, and then enters the metal-air battery pack through the liquid outlet of the float valve, activating the metal-air battery pack.

2. The hydraulically activated metal-air battery water level alarm device according to claim 1 is characterized in that: The bottom of the metal-air battery pack is composed of a plurality of groups of metal-air single cells connected in series; the metal-air single cells are composed of a shell and an air cathode, and the bottoms of the metal-air single cells are connected to each other by an infusion tube; the liquid inlet of the infusion tube is connected to the liquid outlet of the float valve; the metal-air battery pack is installed inside the battery shell; the cavity of the battery shell is provided with an air inlet hole, and the bottom of the battery shell is provided with a single cell fixing groove; the top of the metal-air battery pack includes a metal anode, a metal anode fixing plate, a positive pole, a negative pole and a control circuit; the metal anode is installed at the lower end of the metal anode fixing plate and is connected and fixed to the negative pole; the positive pole and the negative pole are arranged at the upper end of the metal anode fixing plate, and the positive pole and the negative pole are connected to each other through a conductive sheet; the control circuit is arranged above the positive and negative poles, the input port of the control circuit is connected to the positive and negative poles of the battery pack, and the control circuit is also electrically connected to the alarm component.

3. The hydraulically activated metal-air battery water level alarm device according to claim 2 is characterized in that: The metal anode includes magnesium, magnesium alloy, aluminum, aluminum alloy, zinc and / or zinc alloy.

4. The hydraulically activated metal-air battery water level alarm device according to claim 1, characterized in that: The liquid storage tank is arranged at the upper end of the float valve, and the liquid outlet of the liquid storage tank is connected to the liquid inlet of the float valve; a fixed amount of metal-air battery electrolyte is stored in the liquid storage tank; the liquid storage tank ensures that the metal-air battery electrolyte is not leaked, evaporated or frozen due to environmental factors.

5. The hydraulically activated metal-air battery water level alarm device according to claim 1, characterized in that: The metal-air battery electrolyte includes a salt solution and / or an alkaline solution.

6. The hydraulically activated metal-air battery water level alarm device according to claim 2, characterized in that: The output end of the control circuit is connected to a buzzer and a signal light; the control circuit adjusts the electrical signal according to the change of the water level, thereby controlling the magnitude of the output current and regulating the decibel of the buzzer.

7. The hydraulically activated metal-air battery water level alarm device according to claim 1, characterized in that: The alarm component also includes a positioning chip and a wireless signal transmission device; the positioning chip, wireless signal transmission device, buzzer and flash light are connected to the control circuit in parallel; the positioning chip includes Beidou and / or GPS navigation positioning chip; the wireless signal transmission device includes GPRS / CDMA wireless communication, digital radio communication, microwave communication and / or satellite communication.

8. The hydraulically activated metal-air battery water level alarm device according to claim 1, characterized in that: The carrying box is a stepped square box, and a liquid storage tank, a float valve and a metal-air battery pack are arranged inside the carrying box, and a wireless signal transmission antenna is arranged outside the carrying box; a connecting piece is provided on the outer end surface of the carrying box on the side close to the metal-air battery pack, a buzzer sound hole is provided on the upper side of the metal-air battery pack, and a protective sleeve for protecting the float push rod is provided at the lower end of the carrying box close to the float valve; a support arm is installed on the protective sleeve, and a connecting plate is provided at the other end of the support arm.

9. The alarm method of the hydraulically activated metal-air battery water level alarm device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: As the water level rises and reaches the float position, the float starts to drive the float push rod to move upward; Step 2: When the water level rises to a predetermined height, the float drives the float push rod and the connecting rod to move upward to overcome its own gravity and the spring force of the pressure spring. At this time, the valve plate at the top of the connecting rod opens, thereby opening the liquid inlet of the float valve. The metal-air battery electrolyte flows into the first cylinder cavity of the float valve through the liquid inlet of the float valve, and enters the metal-air battery pack through the liquid outlet of the float valve, thereby activating the metal-air battery pack. Step 3: After the metal-air battery pack is activated, it supplies power to the alarm device. The buzzer on the alarm device starts working and transmits the signal to the central control room.

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