48 results about "Float chamber" patented technology

The present disclosure relates to an air intake module (100) which includes a first sensor (10) for continuously monitoring air temperature and pressure at the intake manifold and generating a first sensed signal. The module comprises a float chamber (22) supplying fuel to a housing (12), which includes a first channel (13) with an air inlet (14) and an outlet (15) delivering an air-fuel mixture to the engine. A second channel (105) and a third channel (107) within the housing facilitate air passage. A throttle slide (51), positioned within the first channel, regulates airflow. A second sensor (108) detects the throttle slide (51) position and generates a second sensed signal. A control unit (134) processes sensed signals and generates an actuating signal. An IACV (146) with a plunger (111) adjusts airflow between the second channel and the third channel in response to the actuating signal, enabling air bypass during idle or low-load conditions.

A water-floating thermometer, characterized in that it comprises a translucent float chamber (1), a control board (2), a temperature measuring device (3) and a display device (4), wherein both the temperature measuring device (3) and the display device (4) are electrically connected to the control board (2); wherein the float chamber (1) comprises a mounting cover (11) and a mounting seat (12), and the top of the mounting seat (12) has a first mounting opening (121) through which the control board (2), the temperature measuring device (3) and the display device (4) are arranged inside the float chamber (1), wherein the mounting cover (11) tightly closes the first mounting opening (121) so that the float chamber (1) can float on a liquid;wherein the temperature measuring device (3) is attached to the underside of the mounting seat (12), and the underside of the mounting seat (12) and the temperature measuring device (3) are immersed in the liquid so that the temperature measuring device (3) can measure the temperature of the liquid; and wherein the display device (4) serves to display the temperature of the liquid.

A cleaning apparatus (1000), which is at least used for operating in a water pool, and comprises: a cleaning apparatus main body (110). The cleaning apparatus main body (110) comprises a first accommodating chamber (111) configured to accommodate at least part of a dust box (120), a first end portion and a second end portion. The cleaning apparatus (1000) comprises: an electric control box (220), which is provided in the cleaning apparatus main body (110) and configured to be at least used for accommodating a battery pack; and a buoyancy regulating mechanism (260), which comprises at least one floating chamber, the floating chamber at least comprising a first floating sub-chamber (2631) and a second floating sub-chamber (2632), the first floating sub-chamber (2631) and the second floating sub-chamber (2632) being at least used for accommodating one of gas and liquid, the first accommodating chamber (111) being close to the first end portion, the electric control box (220) being close to the second end portion, at least part of the first floating sub-chamber (2631) being closer to the first end portion than the electric control box (220), and at least part of the second floating sub-chamber (2632) being closer to the second end portion than the first accommodating chamber (111).

The application discloses a fuel supply system and a fuel evaporation reduction balance structure thereof. The fuel supply system comprises a fuel evaporation reduction balance structure which is installed on a body of the fuel supply system and comprises a valve seat connected with a bottom end of a main oil well through a center hole of a float chamber, the float chamber is fixed on the body through the valve seat, the valve seat is provided with an oil inlet transverse hole, an oil inlet transition hole and a sealing step, and an electromagnetic valve is installed on the valve seat and located outside the float chamber to block or open a channel between the main oil well and the float chamber, the electromagnetic valve comprises a valve body and a valve needle, the valve needle is installed in the valve body, and the valve needle corresponds to the sealing step and has a blocking position and an opening position respectively. The application can reduce the amount of fuel evaporated from the main oil well and a main nozzle, thereby reducing the amount of evaporative emission, achieving corresponding emission standards and meeting the requirements of green environmental protection.

The present invention proposes a time-controlled waterway switching device, comprising a valve body, a water inlet passage, waterway A, waterway B, and a float. A float is disposed within the float chamber of the valve body. A water inlet passage is disposed on one side of the valve body, communicating with the float chamber. Waterway B is disposed at the bottom of the valve body. Valve seats A and B are disposed above and below the valve body, respectively. When water flows into the water inlet passage, water pressure presses the float against valve seat B, causing water to flow out of waterway A. When water flow stops, the float rises, sealing valve seat A, causing water to flow out of waterway B, and the float chamber slowly drains water. When the float is above the water inlet of the water inlet passage, water flows into the water inlet passage, presses the float against valve seat A, causing water to flow out of waterway B. When water flow stops, the float sinks as the liquid level in the float chamber drops, causing water to flow out of waterway B. This waterway switching device can achieve time-sequential control of two water outlets by one electrically controlled solenoid valve.

The utility model relates to a carburetor with a novel oil drainage structure, in particular to the technical field of carburetors. The carburetor comprises a carburetor body and an oil drainage mechanism arranged in the carburetor body, the oil drainage mechanism comprises a floater chamber and an oil drainage guide opening, a guide cavity communicated with the oil drainage guide opening is formed in a bottom shell of the carburetor body, a switch rod is arranged in the guide cavity, and the floater chamber is communicated with the oil drainage guide opening. A first boss is arranged at the end, facing the oil drainage guide opening, of the switch rod, a cylindrical protruding head is arranged on the side, close to the oil drainage guide opening, of the first boss, and the end, close to the first boss, of the protruding head is sleeved with a first sealing ring. The raised head is changed into a cylindrical shape and is matched with the first sealing ring, so that the sealing of the oil drainage guide port can be easily realized, the processing precision and the coaxiality of the raised head do not need to be too high, and meanwhile, the hidden danger of oil leakage caused by non-sealing does not exist when the raised head is disassembled and locked for many times.

The utility model discloses a leakproof carburetor which comprises a carburetor body, a floater chamber and a balance hole, a storage oil way is arranged in the carburetor body, and the balance hole is communicated with the floater chamber through the storage oil way. The position where the balance hole is communicated with the oil storage path is higher than the horizontal plane where fuel oil in the oil storage path is located when the carburetor topples to a set angle; the leakage-proof carburetor can ensure that fuel oil in the floater chamber cannot leak out from the balance hole in the inclination process of the carburetor, the fuel is saved, environmental pollution and potential safety hazards are prevented, the safety of an engine is improved, meanwhile, the overall size of the carburetor is not changed, and the carburetor is convenient to use. Compared with a leak-proof carburetor which is communicated with an external fuel oil container or an additional anti-toppling valve outside a balance hole, the leak-proof carburetor has the advantages that the required assembly space is smaller, and the leak-proof carburetor is convenient to assemble.

A fully automatic layer water extraction device for a reservoir, characterized in that it consists of a floating chamber gate opening and closing system, a water extraction branch line, an inlet pipe, an outlet pipe, and an outlet operating shut-off valve, that each layer extraction point is equipped with a specific floating chamber gate opening and closing system, the floating chamber gate opening and closing system consists of a floating chamber guide column and a floating chamber gate connecting rod, a limiting pin for sliding a floating chamber up and down along the column is provided at an upper end of the floating chamber guide column, the floating chamber gate connecting rod is connected to the floating chamber at an upper end and to a gate at a lower end to form an opening and closing system that can operate independently, the gate located at an outlet end,The outlet operating shut-off valve controls the opening and closing of the reservoir's water supply.

According to the safety production device for atomizing and pulverizing the high-temperature-resistant submerged pump pressurized melt through the microporous nozzle, a melt preparation and power part is composed of a smelting furnace, a melt pool and the submerged pump, a melt conveying and atomizing part is composed of a conveying pipe, a variable-diameter pressurizing pipe and a microporous nozzle atomizer, and a pressure-stabilizing safety part is composed of a pressure relief pipe, a safety floating chamber and a return pipe. A powder conveying and collecting part is composed of a powder preparing chamber, a heat exchanger, a powder collector, an air return pipe, a filter, a fan, a refrigerating machine, an air inlet pipe and a supplementary air tank. A gravity floater is installed in a safety floating chamber, after the pressure of a pressure relief pipe exceeds a set index, melt can lift the gravity floater to relieve pressure through a return pipe, and the gravity floater is reset after the pressure is normal; the device adjusts the granularity of the powder prepared by the device by adjusting the pressure of the submerged pump and the aperture of the microporous atomizing nozzle. The device solves the safety problems of overhigh pressure adjustment and continuous operation, the situation that melt is solidified in a pipeline after low temperature is generated in production is avoided, the operation of starting and stopping equipment is simple, and the particle size of powder is controllable to regulate and control.

The application discloses a carburetor intelligent control device and relates to the technical field of carburetors. The device comprises a carburetor main body, a float chamber is arranged at the bottom of the carburetor main body, a main nozzle is arranged in the middle region of the float chamber, a plunger is slidably arranged at the top end of the carburetor main body, a transmission adjusting mechanism is arranged in a device shell, a limiting assembly is arranged at the top of the device shell, a first gear is arranged on the left end surface of a first transmission shaft, a second transmission shaft is arranged below the first transmission shaft, a second gear and a third gear are arranged on the left end surface of the second transmission shaft, and a fourth gear is rotatably connected to the left end surface of the second transmission shaft. The range of the position of the oil needle is adjusted to accurately adapt to the fuel working condition of high-altitude and plain areas. Under the premise that the operation habit of a driver (the same accelerator) is not changed, the fuel supply amount is adjusted, fatigue loss is reduced, and the service life of a reset spring is prolonged.

This utility model relates to a water control valve that is easy to assemble. It mainly solves the problems of low assembly pass rate and poor reliability of existing water control valves assembled using hooks and holes. It includes a valve body (1) and a float chamber (2). The valve body (1) has a first protrusion (3) and a second protrusion (4) on its lower sides. The float chamber (2) has symmetrically positioned, open-topped locking holes (5) on its upper sides. The two locking holes (5) correspond to the first protrusion (3) and the second protrusion (4), respectively, and the first protrusion (3) and the second protrusion (4) can fit into the two locking holes (5). This utility model provides symmetrical locking holes on the side wall of the float chamber. During assembly, the first and second protrusions below the valve body are pushed into the locking holes on the float chamber, saving time and effort during assembly, resulting in a high assembly pass rate, preventing the valve body from easily detaching, and ensuring reliable connection.

This invention relates to a shock-absorbing float level gauge, comprising a float chamber, a float, a suspension rope, a lever, a torsion tube, and a sensor. The float is housed within the float chamber and suspended from the torsion tube by the lever. The float and lever are connected by the suspension rope. The sensor is located on the outer top of the float chamber. A shock-absorbing mechanism is provided at the top of the float chamber, and the lever is connected to the shock-absorbing mechanism. This invention, by incorporating a shock-absorbing mechanism at the top of the float chamber, ensures that the lever smoothly transmits its force to the torsion tube when the float experiences momentary oscillations or the force suddenly disappears under fluctuating measurement conditions. This prevents failure of the torsion tube and spindle, and extends the service life of the torsion tube or spindle.

This invention relates to the field of tire cord fabric preparation technology, and discloses a process and equipment for preparing high-strength, low-shrinkage tire cord fabric, including a preparation table. An impregnation tank is located inside the left side of the preparation table, and a linkage adjustment mechanism is installed on the front of the preparation table. This high-strength, low-shrinkage tire cord fabric preparation process and equipment utilizes the displacement of a floating block in the float chamber as the liquid level rises and falls, driving a rack to move synchronously. This, in turn, automatically adjusts the replenishment flow of the pump via gears, achieving real-time, stepless, and constant control of the adhesive level in the impregnation tank. This solves the problem of uneven impregnation or adhesive overflow and waste caused by liquid level fluctuations due to production line start-up, shutdown, and roll changing. It not only ensures the bonding strength between the cord fabric and rubber and reduces the scrap rate, but also avoids adhesive contamination of equipment and the environment, as well as the safety hazards of carbonization in a high-temperature oven, facilitating more efficient and safer operation in practice.

A float box for priming a fluid pump is provided. The float box comprises a floater inside a float chamber, and an air valve assembly that is operated by the floater. The air valve assembly comprises a valve holder that bounds a valve chamber and an insert opening towards the valve chamber, and a valve body that is inserted in the valve chamber. The valve body comprises a valve cover that closes the insert opening, and a seal holder inside the valve chamber. The seal holder has a seal chamber with an access opening where the seal chamber debouches spaced apart from the valve cover. The air valve assembly comprises a seal element with a seal channel inside the seal chamber, and a valve head that is connected with the floater to close off and release the seal channel.

The utility model discloses an outdoor variable-frequency multi-fuel carburetor, and belongs to the technical field of engine fuel supply devices. The device comprises a body, a floater chamber and a throat pipe are arranged on the body, and a throttle valve and a choke valve which are driven by a variable frequency motor are arranged in the throat pipe; a first air inlet nozzle, an oil nozzle and a negative pressure valve are installed on the body, the negative pressure valve achieves automatic switching between fuel oil and fuel gas through a double-diaphragm structure, fuel gas pressure pushes a second diaphragm and drives a first diaphragm, a valve needle blocks a fuel oil main metering hole, and fuel oil supply is cut off; the negative pressure valve at the bottom of the floater chamber preferentially cuts off fuel oil at low temperature to ensure the concentration of mixed gas; the body is further provided with a choke valve rope control mechanism, the opening degree of a choke valve is adjusted through an inhaul cable when the motor fails, and the concentration of mixed gas is improved. The carburetor solves the problems that an existing carburetor is tedious in fuel switching, unreliable in low-temperature starting and lack of choke valve emergency control, and is suitable for an outdoor operation generator.

This molding device carries out molding by discharging a fluid from a discharge head, and comprises: a storage part which stores a supplied fluid and which can supply the stored fluid to the discharge head; a float which is disposed in the storage part and is displaced according to a stored amount of the fluid; a sensor which detects the position of an upper surface of the float; and a partition member which is disposed so as to partition the interior of the storage part into a supply chamber to which the fluid is supplied and a float chamber where the float is disposed, and in which, at a position lower than the upper surface of the float when the float is at the lower limit of the displacement range, a lower opening is formed such that the supply chamber communicates with the float chamber.

The present invention relates to a double-leaf, same-direction, double-opening hydraulically controlled gate and its use method. The double-leaf, same-direction, double-opening hydraulically controlled gate comprises a gate I rotatably connected between two adjacent gate piers via a vertically arranged gate shaft I. A float chamber, an inlet pipe connecting the float chamber with the upstream side of the gate pier, and a discharge pipe connecting the float chamber with the downstream side of the gate pier are provided within the gate pier between the two gates. The inlet end of the inlet pipe is provided with an inlet valve, and the outlet end of the discharge pipe is provided with a discharge valve. A float is provided within the float chamber, which drives the gate I for rotation via a first transmission system. The present invention utilizes a water source upstream of the gate as power, controls the water level within the float chamber via the inlet valve and the discharge valve, and thereby controls the rise and fall of the float, thereby achieving the opening and closing of the gate. The gate shaft is arranged in the center of the gate, so that the gate plates on both sides of the shaft are subjected to balanced forces, significantly reducing the control force required to open and close the gate. The gate utilizes its upstream water source as power, eliminating various proprietary facilities such as a hoist and close machine, thereby reducing costs.

The utility model relates to a waste gas treatment box, which comprises: a box body, which is provided with a gas outlet and a floating ball chamber; the water inlet pipe is arranged on the box body; the floating ball valve assembly is arranged in the box body and is connected with the water inlet pipe; the air inlet pipe is fixedly arranged in the box body, an air inlet is formed in the upper end of the air inlet pipe, and an air outlet is formed in the lower end of the air inlet pipe; the plurality of groups of flow dividing pipes are arranged in the box body, the upper ends of the flow dividing pipes are communicated with the air inlet pipe, and the lower ends of the flow dividing pipes correspond to the air outlet; tail gas can be decelerated and shunted, the tail gas is scattered, the contact time of the tail gas and cooling water is prolonged, the tail gas can make more uniform and sufficient contact with the cooling water, in this way, the tail gas purification and cooling effect can be guaranteed, meanwhile, the size of bubbles is reduced, and the situation that the cooling water splashes everywhere along with the bubbles can be avoided; therefore, the working environment can be guaranteed, waste of water resources can be avoided, and practicability is high.

The present invention discloses a dual-main orifice carburetor applicable to multiple altitude regions, which includes a carburetor body. A float chamber is formed below the carburetor body by a float cover. A main oil well that is communicated with a throat pipe and used for installing a main jet pipe is formed in the float chamber. A boss is arranged inside the float cover, and a main oil passage, an oil inlet passage and two oil passing passages are arranged in the boss. The main oil passage is communicated with the main oil well, and both of the two oil passing passages are communicated with the main oil passage. A switching valve is arranged outside the float cover, and the switching valve is used to keep the oil inlet passage communicated with one of the two oil passing passages alternatively. The present invention can adjust the oil inlet amount by simply rotating a knob to switch the oil inlet aperture size of the oil inlet passage. The way of adjusting the oil inlet amount has a faster response. By switching the main orifice, the carburetor can meet the requirements of working environments at multiple altitude heights, is safe and efficient, has a low cost, and is suitable for popularization.

This invention discloses a floating roof gap compensation sealing device for storage tanks, comprising: a tank body; an inner floating roof; and a sealing assembly extending circumferentially along the inner floating roof and disposed between the outer edge of the edge floating chamber and the tank wall. The sealing assembly includes a sliding plate, a sealing diaphragm, a pressure plate, and a force-applying elastic plate arranged sequentially from the outside to the inside. The outer side of the sliding plate presses against the tank wall and can slide up and down relative to the tank wall. A force-receiving part is provided on the sliding plate extending inward from the abutment point. The pressure plate is configured to press the sealing diaphragm outward so that the sealing diaphragm presses against the inner side of the sliding plate. The force-applying part acts on the force-receiving part and applies a torque to the force-receiving part rotating in a second rotation direction with the abutment point as the rotation center. The sealing assembly layout of this gap compensation sealing device is ingenious. The abutment point of the sliding plate is tightly pressed against the tank wall, leaving very little liquid between the outer side of the sealing diaphragm and the tank wall, preventing a large amount of liquid from evaporating and escaping. The sealing effect is good and can meet strict gap compensation requirements.

The application discloses a carburetor throttle control method and relates to the technical field of carburetor throttle control. A real-time pitch angle is acquired through an angle sensor, a theoretical displacement amount is calculated in combination with an equivalent arm length calculation theory of a float chamber structure, a horizontal height difference is determined according to a difference between a relative reference height of a main nozzle top end and a relative reference height of a static liquid level, an additional submerged liquid level displacement is obtained through comparison between the theoretical displacement amount and the horizontal height difference, and whether unilateral out-of-boundary occurs is determined in this way. When the additional submerged liquid level displacement is zero, a reference driving differential pressure is calculated. When the additional submerged liquid level displacement is greater than zero, an additional liquid level head is calculated, and a target float chamber pressure is determined. Air supplement flow is calculated based on a fixed micro-hole area, release flow is calculated in combination with the target float chamber pressure and a variable hole area, the variable hole area is solved through flow balance, and the variable hole opening degree is adjusted through a stepping motor, so that the problem that fuel mixing is enriched due to unilateral out-of-boundary of the carburetor under a continuous downhill working condition is solved.

A float valve arrangement (13) is described, comprising a housing (14, 15), a first liquid port (8), a second liquid port (9), a balancing gas inlet (6), and a balancing liquid inlet (7), where the balancing gas inlet (6) and the balancing liquid inlet (7) are connected to a float chamber (5) in which a float (4) is arranged, the float (4) acting on a valve (3) outside the float chamber (4), the valve (3) is arranged between the first liquid port (8) and the second liquid port (9). The valve (3) comprises a cylindrical inner valve element (20) comprising a hollow (23) and a cylindrical outer valve element (21) rotatable about the inner valve element (20), where the float (4) acts on the outer valve element (21) and the first liquid port (8) is connected to the hollow (23) of the inner valve element (20). The float-controlled valve device can easily process high pressure difference. For this purpose, the valve (3) is arranged in the expansion chamber (26).

The utility model discloses a carburetor capable of preventing gasoline evaporation and dumping oil leakage. The carburetor comprises a body, a throat pipe, a floater chamber, a first air nozzle, an oil nozzle and a main metering jet. An electronic valve is mounted at the bottom of the floater chamber, and a pin of the electronic valve blocks a lower port of the main metering hole during power failure to prevent fuel oil / gas from volatilizing; the body is further connected with a negative pressure valve, and when a pressure air source is introduced into a second air nozzle of the negative pressure valve, the valve needle is pushed through transmission of the diaphragm to block an inner hole of the main metering jet, and fuel supply is cut off. When the gas mode is switched to, gas enters the throat pipe through the first gas nozzle and enters the pressure cavity of the negative pressure valve through the second gas nozzle at the same time, the diaphragm is pushed to enable the valve needle to plug the main metering hole, and manual operation is not needed. When the engine stops or topples over, the electronic valve is powered off, the pin blocks the main metering hole, and volatilization of combustible gas and continuous oil supply are avoided. According to the utility model, the problems of deflagration, fuel oil loss and cumbersome switching in the prior art are solved, and the safety and the use convenience are improved.

The invention discloses an overflow alarm box and an overflow alarm method. The overflow alarm box includes an upper overflow pipe and a lower overflow pipe, the upper end of the upper overflow pipe is connected to an upper outer flange, the lower end of the lower overflow pipe is connected to a lower outer flange, an overflow cylinder is arranged on the periphery of the lower overflow pipe, an upper annular flange is connected between the overflow cylinder and the upper overflow pipe, a lower annular flange is connected between the overflow cylinder and the lower overflow pipe, an overflow baffle is arranged between the upper overflow pipe and the lower overflow pipe, and the overflow baffle is connected to the pipe wall of the lower overflow pipe through a supporting foot; an annular space for storing overflow oil is formed between the outer circle of the lower overflow pipe and the inner hole of the overflow cylinder, a float chamber is arranged on the outer wall of the overflow cylinder, an overflow flow hole connecting the annular space and the float chamber is arranged on the cylinder wall of the overflow cylinder, and a float switch is installed in the float chamber. The invention facilitates the installation of the overflow alarm box and the observation of the liquid level in the overflow alarm box, and improves the sensitivity of the overflow alarm device in the case of a slight overflow of fuel.

The utility model provides an automatic switching high-altitude fuel oil supply system which comprises a body. The floater chamber is fixed on the body; the main metering hole is formed in the side of the float chamber; and the high-altitude measuring jet is locked on the side surface of the main oil well of the body. The automatic switching high-altitude fuel oil supply system not only can meet the requirements of performance, emission and the like of an engine in a plain area, but also can meet the requirements of performance, emission and the like of the engine in a plateau area.

The utility model discloses a safety warning device for water traffic relates to water traffic technical field, including warning device body, the bottom of warning device body is provided with the float chamber, the top of warning device body is provided with warning light, the surface of float chamber is provided with installation and dismounting mechanism, the installation and dismounting mechanism includes the disc of setting at the surface of float chamber, the disc inside is provided with the docking rod of extending to the outside. The utility model discloses through pulling the pull rod can drive the moving rod to extrude the spring, then will the connecting plate drive the docking rod and insert the inside of disc, again loosens the pull rod, through the reset effect of spring, can make the moving rod and docking rod lock tightly, so that the connecting plate can be installed on the outside of float chamber fast, the connecting plate that sets up can effectively block the branch or garbage of the impact of float chamber, avoid direct contact safety warning device, reduce the phenomenon that the inside circuit loosens short circuit caused by direct impact simultaneously.

The utility model relates to the technical field of motorcycle components, and discloses a high-reliability flat suction type motorcycle carburetor which comprises a shell, an opening is formed in the middle of the top end of the shell, a floater chamber is fixedly installed at the top end of the shell and located on the outer side of the opening, and a pneumatic floater is slidably connected into the floater chamber in a sealed mode. The bottom end of the pneumatic floater is hermetically and slidably connected into the opening. By adopting the design of the pneumatic floater structure, the floater structure comprises the floater chamber, the floater chamber is fixedly installed above the middle of the shell, the pneumatic floater is installed in the floater chamber in a sealed and sliding mode, when the pneumatic floater is pressed to rise, the pneumatic floater is compressed with air in the floater chamber, and when the pneumatic floater is not pressed, the pneumatic floater is compressed with air in the floater chamber. Compared with a spring piston type floater structure, the pneumatic floater structure has the advantage that the durability and the reliability of the pneumatic floater structure are better.

An exhaust valve assembly is provided that includes a housing having a float chamber. The exhaust valve assembly further includes a float assembly having a movable float movable along a longitudinal axis and a plate assembly having a first side facing the float assembly. The float includes a float guide structure that is operatively engaged with a plate guide structure disposed on the plate assembly. The guide structures constrain or guide movement of the float along the longitudinal axis.

The utility model discloses an airtight detection device for a buoyancy tank. The airtight detection device comprises a water tank filled with water; a base; the support is located on the side portion of the water tank and fixed to the base; the driver is fixed with the bracket; the pressing assembly is driven by the driver to apply pressure to the buoyancy tank to enable the buoyancy tank to be submerged into water in the water tank, and the pressing assembly is connected with the driver; the air supply assembly is used for being connected with the buoyancy tank and inputting air into an inner cavity of the buoyancy tank. According to the utility model, airtightness detection can be carried out on the welded buoyancy tank.

The invention relates to a liquid level indicator cavity outside a float chamber. The liquid level indicator cavity comprises a main body part and a cover plate part, the main body part comprises a main body groove, and an opening of the main body groove is covered and sealed by the cover plate part; the cover plate part comprises a transparent panel and a frame which are fixedly connected; the cover plate part completely covers and seals the opening of the main body groove; the transparent panel comprises N panel sections, the frame comprises frame long edges and frame transverse edges and defines N windows, and the N panel sections correspond to the N windows respectively and are fixedly connected and sealed with the corresponding frame transverse edges and frame long edges. The sectional type interface structure is adopted, the problems of manufacturing, transportation and installation of the indicator cavity of the wide-range liquid level meter are solved, and production and application of the wide-range liquid level indicator cavity and the corresponding on-site indication type liquid level meter are effectively achieved.