1182results about "Level indicators by floats" patented technology

The utility model discloses an underground water level monitor for geotechnical engineering, which relates to the technical field of water level monitoring and comprises a probe rod body and a protective sleeve sleeved outside the probe rod body, and the top end of the probe rod body is provided with a traction rope penetrating out of an annular seat at the top of the protective sleeve; an overturning frame is rotationally installed on the side face of the bottom of the protective sleeve, a floating plate and a plugging frame are arranged at the two ends of the overturning frame respectively, and the plugging frame is arranged at the end, close to the protective sleeve, of the overturning frame; a floating plate is arranged at the upper part of the floating plate; by means of the torque change design of the floating plate, the overturning frame and the plugging frame, when the floating plate does not enter water, the plugging plate covers the open groove in the lower end of the protective sleeve, and rock soil and other sundries can be prevented from entering the protective sleeve to affect the probe rod; when the floating plate enters water, the blocking plate is moved away, so that the probe rod can be in contact with the water body in time to monitor the water level.

A charging and refuelling station for an autonomous cleaning robot including; a charging mechanism including a sprung mount resiliently supported on the charging and refuelling station, a swivel mount pivotally supported on the sprung mount, the swivel mount supporting contact plates for contacting charging contact plates of the autonomous cleaning robot when docked at the station; and a water exchange system including a tap for fresh water refilling of the autonomous cleaning robot, and a draining system including a drain tank for receiving water draining from the autonomous cleaning robot.

The invention discloses a single-ultrasonic-head sensor for measuring liquid density and liquid level height, which relates to the technical field of liquid level measurement and comprises a floater component, a reflection cavity component and an ultrasonic sensor component. The floater assembly is assembled on the reflection cavity assembly, the reflection cavity assembly is connected with the ultrasonic sensor assembly, and the ultrasonic sensor assembly is connected with the floater assembly through the reflection cavity assembly. High-frequency ultrasonic waves are transmitted and received through a single point, the sound velocity (density) and the ultrasonic wave return time difference (liquid level) are synchronously analyzed, the density and the liquid level of the urea solution are calculated, the problems of mechanical interference and data splitting are avoided, and the trepanning and cable cost is reduced; the shared high-precision temperature compensation module directly eliminates compensation deviation of the split system, and maintenance only needs single-point anti-crystallization treatment; and in combination with a cross validation algorithm (density liquid level logic mutual verification), the operation and maintenance cost is reduced while the data reliability is improved, and the method is particularly suitable for space-limited and highly-corrosive urea solution detection scenes.

The invention relates to the technical field of water level detection devices, and discloses a saturated sand layer field anti-floating water level detection device and a using method thereof.The saturated sand layer field anti-floating water level detection device comprises a floating rod, a flange plate and a gauge outfit, a limiting block is arranged at the lower end of the floating rod, a cleaning assembly is movably assembled on the surface of the floating rod, the periphery of the floating rod is sleeved with a floater, the cleaning assembly is located above the floater, and a transmission bin is formed in the floating rod; the cleaning assembly comprises a first magnet arranged in the transmission bin and a movable sleeve arranged on the periphery of the floating rod in a sleeving mode, a second magnet magnetically connected with the first magnet is fixed in the movable sleeve, and an infrared sensor for detecting the position of the floater is installed on the lower surface of the flange plate. The cleaning assembly, the floater locking structure and the infrared sensor are integrated, impurities on the surface of the floating rod can be automatically removed, clamping stagnation of the floater is avoided, and manual maintenance is reduced; when the liquid level fluctuates, the floater is locked to prevent data distortion and damage; the infrared sensor provides a basis, and the complex environment adaptability of the saturated sand layer field area is improved.

The utility model relates to the field of detection devices, in particular to a magnetostriction liquid level meter detection device which comprises a fixing plate, a detection assembly and a supporting assembly. A supporting assembly used for supporting and damping to prevent the magnetostriction liquid level meter from being damaged is installed on the outer side of the fixing plate, and a detection assembly used for detecting liquid is installed in the fixing plate. The supporting assembly comprises a mounting base, a fixing block, a connecting block, a telescopic column, a damping spring, an electric push rod, a supporting plate, a suction cup, a flange, an electric cabinet, a mounting cavity, a threaded sleeve, a fixing nut, a quick connector, a connecting column and a damping pad, the mounting base used for supporting the magnetostriction liquid level meter is arranged at the center of the upper end of the fixing plate, and the flange is arranged at the center of the upper end of the mounting base; according to the magnetostriction liquid level meter detection device, displacement caused by external vibration or impact is prevented through the damping structure, the magnetostriction liquid level meter detection device can be kept horizontal all the time through the electric push rod, and the device can be installed and detached more rapidly through various rapid installation structures.

The invention relates to the technical field of accumulated water level measurement, in particular to a sunken road accumulated water monitoring device which comprises a base and a plurality of fixing cones fixed to the bottom of the base and further comprises a plurality of vertical arms fixed to the base, a top plate is fixed to the ends, away from the base, of the vertical arms, and a display panel is fixed to the side of the top plate. A triangular display area is arranged in the display panel; the shielding mechanism is connected with the display panel and can move relative to the display panel; the floating balls are arranged on the side of the base and connected with the follow-up mechanism installed on the base, the follow-up mechanism is connected with the shielding mechanism, and the follow-up mechanism is triggered when the floating balls ascend; when the floating ball is located at different heights, the display areas correspond to different display conditions, display and reflection of the water level condition are comprehensive, in the monitoring process, the height of the floating ball changes, the height of the display panel is fixed, the height of the display panel is equal to that of a traffic sign, and therefore passing personnel can pay attention to and observe the display panel conveniently.

The invention belongs to the technical field of water conservancy monitoring, and particularly relates to an intelligent water conservancy online monitoring system which comprises a main frame, a mounting opening is formed in the top of the main frame, a guide sleeve fixedly connected with the main frame is inserted into the mounting opening, a moving rod is inserted into the guide sleeve, a floating plate is fixed to the bottom end of the moving rod, and a water sample monitor is fixed to the top of the floating plate. A monitoring probe on the water sample monitor penetrates through the floating plate and extends to the position below the floating plate, a displacement sensor is fixed to the top end of the moving rod, and a cleaning mechanism is further arranged on the main frame and used for regularly cleaning impurities on the moving rod. According to the device, the floating plate can descend or ascend along with the water surface, so that the water level is monitored on line, and the water sample monitor can monitor related indexes of water quality on line through the monitoring probe, so that the monitoring is more convenient, and the device structure is more simplified.

The utility model relates to the technical field of magnetic floater liquid level meters, in particular to a visual magnetic floater liquid level meter display device which comprises a body pipe, two bypass liquid guide pipes arranged on the rear side of the outer wall of the body pipe, an upper blocking cover arranged at the top of the body pipe, a flange lower cover arranged at the bottom of the outer wall of the body pipe and a turning plate box arranged on the front side of the body pipe. A magnetic turning plate indicator and a graduated scale are arranged on the front side of the turning plate box, a frame-shaped butt joint groove is formed in the front side of the outer wall of the turning plate box, a protective cover is arranged at the frame-shaped butt joint groove in a sleeving mode, and a transparent acrylic plate is arranged on the front side of the protective cover in a penetrating mode. According to the visual magnetic floater liquid level meter display device, the replaceable protective cover is designed, when the transparent acrylic plate is damaged or affected by dirt, a user does not need to replace the whole device or carry out complex cleaning, only the protective cover needs to be replaced, maintenance complexity and time cost are greatly reduced, and the visual magnetic floater liquid level meter display device is convenient to use. And the maintainability and the service life of the equipment are improved.

The invention provides a liquid level measuring device, a liquid level measuring method and a liquid container, and the liquid level measuring device comprises a sensor which is provided with a stay wire; the rotating component is connected with the other end of the stay wire and is used for rotating by taking a rotating shaft as a center; one end of the connecting rod is fixed to the rotating assembly, and the other end of the connecting rod extends outwards from the rotating assembly; the buoy is connected to the other end of the connecting rod and floats on the surface of the liquid, the buoy moves along with the change of the liquid level of the liquid, the movement of the buoy drives the connecting rod to rotate with the rotating shaft of the rotating assembly as the center, and meanwhile, the movement of the buoy drives the pull wire to generate displacement through the rotation of the connecting rod and the rotating assembly; the processor is electrically connected with the sensor; the sensor is used for converting displacement generated by the stay wire into electric signals, and the processor determines and outputs liquid level data of liquid based on the electric signals. Accurate detection of the liquid level is achieved, tiny changes of the liquid level can be detected, meanwhile, the buoy cannot be wound in the moving process, and product faults are avoided.

A sensing assembly for use in a piezoelectric liquid level sensor. The sensing assembly comprises: a first piezoelectric sensing module arranged on a magnetostrictive wire and adapted to receive an ultrasonic guided wave signal propagating along the magnetostrictive wire; a second piezoelectric sensing module arranged on the magnetostrictive wire and spaced apart from the first piezoelectric sensing module; and an isolation layer arranged on the magnetostrictive wire between the first piezoelectric sensing module and the second piezoelectric sensing module and adapted to block the ultrasonic guided wave signal from propagating to the second piezoelectric sensing module. Using the sensing assembly, the liquid level of the oil in the tank can be calculated precisely under a strong vibration noise.

The application discloses an oil level sensor for oil tank oil quantity detection, which comprises a sealing plate, a mounting table integrally formed on the upper surface of the sealing plate, a liquid level sensor and a float oil quantity sensor fixed on the lower surface of the mounting table, a connecting rod rotatably arranged on the lower surface of the float oil quantity sensor, a hollow float ball fixed on the lower end of the connecting rod, a positioning pipe arranged in the hollow float ball and fixed on the inside of the positioning pipe, a limiting hole arranged in the center of the hollow float ball, trumpet mouths arranged on both ends of the limiting hole, a limiting rod arranged in the limiting hole, a connecting rod fixed on the upper end of the limiting rod and a limiting plate arranged on the lower end of the connecting rod. The application improves the structure of the float in the existing oil level sensor, can make the float have a larger measuring range, improve the measuring precision of the oil level, can limit the measuring path of the float, and can keep the oil level sensor for a long time of accurate measurement without frequent maintenance, so it is suitable for wide popularization and application.

The invention provides a reservoir water rain condition monitoring system and a monitoring method, the system constructs a dual monitoring system of physical observation reference and electronic automatic acquisition, a customized stainless steel water gauge and a multi-element acquisition device are deployed on key sections of a reservoir dam and a drainage basin, and a front-end edge calculation module is utilized to invert the flow in real time. And after the data is transmitted to the cloud platform, intelligent management and control are carried out through the four-pre functional module. The system displays the watershed situation based on a GIS graph, integrates an online flow measurement algorithm to generate a water and rain condition process line in real time, and realizes visual supervision by combining video monitoring and OSD data superposition. The core multi-target optimization scheduling model comprehensively considers flood control safety and power generation benefits, generates an optimal scheduling scheme through simulation deduction, and provides a closed-loop control interface. The problems of low monitoring precision, scheduling decision lag and the like in the prior art are solved, and the automatic management level and the water resource utilization rate of the reservoir group are remarkably improved.

The invention discloses an intelligent temperature control anti-crystallization magnetic turning plate liquid level meter and a solution storage tank, the equipment comprises a measuring cylinder, the outer side of the measuring cylinder is sleeved with a constant-temperature jacket, the constant-temperature jacket is internally provided with a constant-temperature cavity, and the constant-temperature cavity is filled with a heat-conducting medium; the floater is connected into the measuring cylinder in a sliding manner, and a corrosion-resistant coating is arranged on the floater; the pull rod is also slidably connected in the measuring cylinder, the bottom of the pull rod is connected with a scraping plate, and the scraping plate is located above the floater and abuts against the inner wall of the measuring cylinder; the turning plate is arranged on one side of the measuring cylinder, and the end part of the turning plate extends into the measuring cylinder and is movably connected with the scraping plate; the remote transmission rod is arranged on one side, close to the measuring cylinder, of the turning plate; the circulating liquid upper communicating pipe is arranged on one side of the top of the measuring cylinder; the circulating liquid lower communicating pipe is arranged on one side of the bottom of the measuring cylinder; the conical crystal collecting tank is arranged below the measuring cylinder, a vibration motor and a urea solution lower communicating pipe are arranged on the conical crystal collecting tank, and a pressure transmission is arranged on the urea solution lower communicating pipe.

In a method for continuously supplying a metering device with different batches of one and the same liquid medium, a progressive addition of the medium of a new batch takes place during a batch change.

The invention relates to the technical field of settlement height monitoring, in particular to a device and method for high-precision measurement of roadbed settlement height, and the device for high-precision measurement of roadbed settlement height comprises a housing, a buoy, an internal measurement mechanism and an adjusting part. A center rod is arranged in the shell, the center rod is coaxially sleeved with a spiral rail, and a spiral groove is formed in the peripheral face of the spiral rail. The floating cylinder is coaxially arranged outside the spiral track in a sleeving mode, the floating cylinder can move up and down along the center rod along with the height change of the liquid level in the shell, and a ball structure is arranged on the inner circumferential face of the floating cylinder and can slide along the spiral groove; the internal measuring mechanism is arranged between the buoy and the shell, and the internal measuring mechanism can measure the height of the liquid level; the adjusting piece can move up and down along the center rod, so that the screw pitch of the spiral track is changed, the up-and-down moving speed of the buoy is changed, and the accuracy of the roadbed settlement monitoring result can be improved.

The invention discloses a foam-containing slurry liquid level measuring device and a using method thereof, and relates to the technical field of liquid level measurement, the foam-containing slurry liquid level measuring device specifically comprises a range finder body and a liquid storage tank, a defoaming cylinder located below the range finder body is fixedly installed in the liquid storage tank, and a counterweight buoy is movably installed in the defoaming cylinder; and a lower mounting plate positioned above the liquid storage tank is movably mounted at the lower end of the range finder body. Through cooperation of the range finder body, the liquid storage tank, the defoaming cylinder, the counterweight buoy, a lower mounting plate, an upper mounting plate and a spring clamping piece, the counterweight buoy moves in the defoaming cylinder, so that the defoaming cylinder eliminates foam in foam-containing slurry, signals of the range finder body are in contact with the counterweight buoy, and the foam in the foam-containing slurry is eliminated. Meanwhile, the elastic clamping piece is adopted to adjust the distance between the upper mounting plate and the lower mounting plate, so that the upper mounting plate and the lower mounting plate can be suitable for mounting range finder bodies with different sizes.

The invention relates to the technical field of measurement, in particular to a float-type water level gauge dynamic compensation detection method which comprises the following steps: collecting float angle sequence data; synchronously acquiring environment disturbance parameters; calculating the floater angle sequence data to obtain a preliminary water level value; constructing a dynamic compensation model, and outputting an inertia force correction term, a fluid damping correction term and a mechanical hysteresis correction term; the inertia force correction term, the fluid damping correction term and the mechanical hysteresis correction term are multiplied by corresponding weight factors respectively, then algebraic sum is solved, a total compensation amount is obtained, and the weight factors are dynamically adjusted and normalized according to the current wave high energy spectral density, the wind speed gradient change rate and the water temperature viscosity correction coefficient; and deducting the total compensation amount from the initial water level value, and outputting a final compensated water level value. According to the method, the problems of poor multi-physical field sensing capability and poor online parameter identification capability of a compensation method in the prior art are solved.

The invention discloses an anti-magnetic interference magnetic flap liquid level meter, and relates to the technical field of magnetic flap liquid level meters, the anti-magnetic interference magnetic flap liquid level meter comprises a main pipeline and a blow-down valve in flange connection with the bottom end of the main pipeline, the front surface of the main pipeline is fixedly provided with a magnetic flap indicator, the inner wall of the main pipeline is symmetrically provided with slide rails, and the slide rails are slidably connected with slide blocks; the number of the sliding blocks is two, a magnetic floater is fixedly installed between the two sliding blocks, and a plurality of rolling wheel installation grooves are formed in the ends, close to the sliding rails, of the sliding blocks. By arranging a totally-closed electromagnetic shielding structure, interference of an external strong magnetic field is effectively blocked, it is ensured that magnetic coupling between the magnetic floater and the turning plate is stable, and the problems of false operation of the turning plate and display misalignment are solved; meanwhile, the combination of the sliding rail and the sliding block with the rolling wheel is adopted, the magnetic floater is restrained to move only in the vertical direction, the rolling, collision and jamming risks of the magnetic floater during medium boiling are reduced, the magnetic synchronism stability is maintained, and the problems of floater instability and indication distortion are solved in a targeted mode.

To provide a flood monitoring device, a flood monitoring system and a flood monitoring method with which it is possible to calculate the water depth and stream speed of rivers with good accuracy, without using expensive sensors.SOLUTION: The present invention comprises: an acquisition unit that acquires a captured image having been captured by an imaging device that captures the image of a buoy on the water surface among buoy-type sensors having a buoy floating on a river and an unwinding mechanism that is connected to the buoy by a connecting line and capable of unwinding and pulling back the connecting line, and that is fixed to the bottom or near the bottom of the river; and a first calculation unit that derives, from the captured image, the horizontal displacement of the buoy from the water surface position in a direction perpendicular to the unwinding mechanism and the submerged state of the buoy, and calculates the water depth and stream speed of the river on the basis of the displacement, the submerged state, and a first relationship of balance of forces and tensions due to the gravity, buoyance and stream acting upon the buoy.SELECTED DRAWING: Figure 2

The utility model belongs to the field of bridge water level detection, and particularly relates to a bridge water level measuring device. The device comprises a connecting plate connected with external equipment, the connecting plate is connected with a water flow detection assembly, and a water flow counter is arranged at the bottom of a water discharging frame; one side of the drainage frame is fixedly connected with the connecting plate, and the other side of the drainage frame is connected with a water level monitoring assembly; a sliding spring is connected between the sliding block and the inner wall of the connecting frame body, dampers are arranged at the two ends of the sliding spring, corresponding point contacts are arranged on the sliding block and the connecting frame body, and the point contacts are located at the two ends of the sliding spring; all the components are integrated together through the connecting plates, and the device is compact in overall structure, convenient to install, high in impact resistance, complete in auxiliary function, environmentally friendly, capable of saving energy and capable of better meeting the requirement for bridge water level measurement.

This liquid level sensor 1 includes: a sleeve 2 that is provided in a vertical direction; a float 3 that moves along the sleeve as a liquid level fluctuates; a resistance row 4; a plurality of grounding means 5 that are provided inside the sleeve; and a liquid level signal output means 6 that extracts, as a liquid level signal that is a signal corresponding to the liquid level, an electric signal detected between a positive electrode side end part 4a and a connection part grounded by the grounding means 5, and further includes a warning signal output means 7 that outputs a warning signal when the float 3 is located within a predetermined distance from a warning position that is a predetermined position within a movable range of the float 3. Accordingly, a compact and highly reliable liquid level sensor is achieved.

The utility model discloses a liquid level observation device for a harbor type pump pool, and relates to the technical field of liquid level observation. The device comprises a bottom plate, a protection mechanism and a configuration mechanism are arranged on the bottom plate, and the protection mechanism comprises a plurality of clamping plate sets fixedly connected to a top plate of the bottom plate. By arranging the protection mechanism, in the process that the floating block floats along with the water surface, the filter screen on the outer side of the floating block can effectively intercept impurities on the water surface and prevent the impurities from winding or blocking the floating block, the accuracy of water level measurement is guaranteed, and if the filter screen is blocked due to long-term use and needs to be cleaned, the indication blocks on the two sides can be pulled outwards to prevent the floating block from being blocked. The indicating block slides along the outer wall of the first sliding rod, meanwhile, the spring on the first sliding rod is compressed, the spring accumulates energy so that follow-up resetting can be facilitated, limiting of the filter screen is relieved along with outward movement of the two clamping blocks, at the moment, the filter screen can be pulled out by means of sliding of the filter screen in the multiple clamping plate sets, and therefore the filter screen can be conveniently cleaned or replaced.

This application discloses a water level monitoring device, comprising: a support frame with its bottom disposed at the bottom of the water area to be measured; and a measuring end fixed to the support frame. The measuring end includes a float assembly and a measuring rod. The float assembly is disposed within the hollow structure of the measuring rod. The float assembly moves within the measuring rod due to changes in the buoyancy of the liquid in the water area. This application allows for direct observation of changes in the liquid level in the water area by measuring this movement distance, effectively avoiding errors caused by liquid level fluctuations, human error, or probe blockage, thus improving monitoring accuracy. Furthermore, the water level monitoring device provided by this application is easy to install and use, has low operational difficulty, and wide applicability.

The invention discloses a desktop type water bath high-low temperature exchange device capable of automatically replenishing water, which relates to the field of laboratory test equipment and comprises a high-temperature pool, a low-temperature pool and a sample transfer mechanism arranged between the high-temperature pool and the low-temperature pool, the high-temperature pool and the low-temperature pool are each provided with one automatic water supplementing system, and each automatic water supplementing system comprises a detection unit used for detecting the water level, a controller and a water supplementing execution unit controlled by the controller. According to the automatic water supplementing system, through the synergistic effect of the detection unit, the controller and the water supplementing execution unit, precise closed-loop control over the water level of the high-low-temperature water pool is achieved. The system can monitor the water level change in real time, automatically complete water replenishing operation, ensure that the water level is always maintained in a preset range in the whole experiment process, realize long-time unattended continuous testing, and improve the automation degree and the operation reliability of equipment.

The present invention relates to the field of liquid detection technology, specifically a continuous automatic liquid dispensing system and device thereof, comprising a display unit, a detection rod connected to the lower end of the display unit, a flange provided on the detection rod, two floats that can move with the liquid surface provided on the detection rod, the two floats can be divided into an upper float and a lower float according to their positions, a placement groove is provided on the top of the two floats, and the two placement grooves are circular grooves with the detection rod as the axis. The present invention detects whether there is a blockage in the gap between the corresponding float and the detection rod by checking whether the extrusion block 1 and the extrusion block 2 are separated for a long time, and then cooperates with the wire and the snap ring through a micro servo motor and a winding box. When the float is stuck, the micro servo motor drives the wire to be wound through the winding spring in the winding box, and then drives the float to move up and down through the snap ring. The blockage in the gap between the float and the detection rod is separated by the friction of the float movement to solve the problem.

The application discloses a household air conditioner float type liquid level sensor and a manufacturing method thereof, and comprises a sensor body, a protective sleeve, two symmetrical opening grooves on the protective sleeve, a protective net matched and clamped in the opening grooves, and a limiting ring plate sleeved on the protective sleeve. The method steps are as follows: (1) processing of the protective sleeve; and (2) component assembly. The application can protect the measuring rod from collision through the design of the protective sleeve, and the opening grooves and the protective nets are arranged on the protective sleeve. The protective nets can not only play a protective and shielding role, but also will not affect the circulation of the fluid in the equipment, improve the measurement accuracy of the liquid level sensor, and the limiting ring plate is sleeved on the protective sleeve to indirectly connect and fix the two protective nets, so that the installation stability of the protective nets and the limiting ring plate on the protective sleeve is ensured.

The utility model belongs to the technical field of buoy liquid level meters, and discloses a precise buoy liquid level meter which comprises a buoy shell, a control block fixedly installed at the top of the buoy shell, a balance assembly fixedly installed at the top of the control block, a bottom cover in threaded connection with the bottom of the buoy shell, and a reinforcing rod fixedly connected with the inner wall of the bottom cover. The surface of the reinforcing rod is attached to the inner wall of the buoy shell, a conveying pipe is arranged on one side of the control block, a connecting pipe is inserted into one end of the conveying pipe, the balance assembly comprises a sliding groove block, the sliding groove block is fixedly installed on the top face of the control block, and a balance block is slidably connected into the sliding groove block. Through the arrangement of the balance assembly and the control block, when a person installs the buoy shell, the person can utilize the sliding groove block to be matched with the balance block to observe whether the buoy shell is inclined or not in the buoy shell installation process, so that the situation that the buoy shell is inclined during installation, and a measurement part of the buoy liquid level meter is accurate is easily caused is avoided.

The utility model discloses a novel side-mounted magnetic liquid level metering device, which relates to the technical field of liquid level metering devices and comprises a shell, a mounting mechanism is arranged on the shell, the shell is mounted on an external container through the mounting mechanism, a cavity is arranged in the shell, a liquid inlet pipe communicated with the cavity is fixed at the bottom of the shell, and a liquid outlet pipe communicated with the cavity is fixed at the bottom of the shell. According to the novel side-mounted magnetic liquid level metering device, after liquid level metering is completed, the end opening of the branch pipe is plugged through the sealing plug, the miniature air pump works and injects air into the cavity, the air pressure in the cavity rises, liquid in the cavity is pressed, the liquid in the cavity is separated from the branch pipe, the liquid in the cavity is separated from the branch pipe, and the liquid in the cavity is separated from the branch pipe. The liquid in the cavity flows back to the external container through the liquid inlet pipe under the action of air pressure, so that after measurement is completed, the liquid in the cavity can automatically flow back to the container to be measured, and the liquid is prevented from being wasted.

The utility model relates to the technical field of geotechnical engineering, in particular to a geotechnical engineering investigation water level measuring device, which is provided with a vehicle body bracket structure with a vertical adjustment function, so that the detection precision can be improved through adjustment, and the reliability is improved; comprising a water level tester, and further comprises a frame, steering shafts, wheel boxes, rolling wheels, movable ball sleeves, jacking screw sleeves, jacking screw rods, jacking screwing handles, movable balls, sliding sleeves, a bubble level and a surveying pipe, the front portions and the rear portions of the bottom ends of the two sides of the frame are rotationally connected with the middles of the top ends of the wheel boxes through the steering shafts respectively, and the rolling wheels are rotationally arranged on the inner sides of the wheel boxes respectively; the inner wall of the movable ball sleeve is movably connected with the outer wall of a movable ball, a sliding sleeve is arranged in the movable ball, one side of the outer end of the sliding sleeve is further connected with a bubble level, and the inner side of the sliding sleeve is slidably connected with the outer side of a surveying pipe. The water level measuring instrument is installed in the surveying pipe.

The utility model provides a magnetic type liquid level meter light-emitting panel which comprises a measuring cylinder, the measuring cylinder is fixedly sleeved with two hoops, a display support is fixedly arranged in front of the two hoops, a light-emitting assembly is arranged at the front end of the display support, and a light reflecting assembly is arranged on one side of the display support. The light-emitting panel can be disassembled and assembled, the internal lamp body is protected, meanwhile, the light-emitting panel can be rapidly turned on to replace and maintain the lamp body, and the problems that the difficulty is high and the workload is large when internal lamp beads are replaced and maintained are solved.