46 results about "Oxygen meters" patented technology

The invention provides a method for optimizing the proportion of industrial waste residues and a microbial composite curing agent, and belongs to the technical field of building materials.The method comprises the steps that the industrial waste residues are ground into superfine powder with the specific surface area of 350-450 m < 2 > / kg, meanwhile, bacillus is cultured at the temperature of 30-35 DEG C until the concentration of bacillus is 108-109 / mL, and a mixture is obtained; a pH meter and a dissolved oxygen meter are adopted to monitor the state of a microbial solution in real time, the aeration intensity and nutrient solution supplement are automatically adjusted according to critical value judgment, a composite curing agent is prepared according to the calculation proportion, the interface bonding strength and compressive strength are tested, and the curing effect is evaluated through a strength development equation and a durability prediction equation. According to the comprehensive performance indexes, the matching parameters are dynamically adjusted, the testing and adjusting process is repeated until the results are stabilized in the target performance interval for five continuous times, the final matching is determined, and the technical problem that the matching of the industrial waste residues and the microbial composite curing agent is difficult to accurately optimize is solved.

The application relates to a micro-dissolved oxygen meter secondary instrument calibration method, system and storage medium, and relates to the technical field of secondary instrument calibration. The calibration process of the micro-dissolved oxygen meter is imperfect, and the calibration of the secondary instrument of the micro-dissolved oxygen meter is insufficient, so that the calibration accuracy and reliability of the micro-dissolved oxygen meter are low. The method comprises the following steps: determining the target priority of a plurality of preset secondary instrument calibration modes according to the measurement indexes of the secondary instrument to be measured; the target priority represents the initial order of calling each preset secondary instrument calibration mode for calibration; according to the target priority, each preset secondary instrument calibration mode is called to calibrate each measurement index of the secondary instrument to be measured, and a calibration report is obtained; the plurality of measurement indexes include one or more of the following: a dissolved oxygen concentration measurement value, a temperature measurement value or a temperature-compensated dissolved oxygen concentration measurement value; one preset secondary instrument calibration mode corresponds to one measurement index.

The utility model discloses a portable replacement formula dissolved oxygen appearance probe structure, including equipment main part, the top of equipment main part is provided with connecting wire, and the one end fixedly connected with the mounting head of connecting wire relative equipment main part, the bottom of mounting head is provided with metal insert piece, and portable replacement formula dissolved oxygen appearance probe structure still includes the plug -in board, and the both sides of plug -in board are relatively arranged in the bottom of mounting head. In the above -mentioned scheme, the mounting head is inserted with the butt joint pipe, makes metal insert piece to be inserted into the insert piece groove, and the plug -in board of setting on the both sides of mounting head bottom enters the plug -in groove, the arc -shaped clamping block of plug -in board bottom setting contacts with the inner wall of plug -in groove and is extruded, and the spring of guiding column inside connection produces the deformation, and arc -shaped clamping block shrinks to the plug -in board simultaneously, makes the whole probe more simple and concise, and the top joint can integrate annular sealing ring, and when the buckle is closed, synchronous compression sealing washer no.

The invention provides an Allen test intelligent measuring device and a measuring method thereof.The Allen test intelligent measuring device comprises a finger clip type oximeter, a main control instrument on a vertical rod and two automatic pressing mechanisms arranged on the vertical rod, the distance between the automatic pressing mechanisms can be adjusted, and the automatic pressing mechanisms emit laser rays obliquely downwards through a laser device and are aligned with the radial artery and the ulnar artery of the wrist of a patient respectively; the piston column is driven by the motor to press downwards and apply pressure to the wrist of a patient, and the pressing pressure is sensed through the pressure sensor; and the finger clip type oximeter, the motor, the pressure sensor and the laser are respectively in communication connection with the main control instrument. The device has the advantages of being compact in structural design, accurate in measurement, convenient and fast to operate, time-saving and labor-saving, and capable of further analyzing measurement data and obtaining a more comprehensive test result.

The invention discloses a combustion carbon dioxide on-line monitoring system based on a CEMS. The combustion carbon dioxide on-line monitoring system comprises a parameter acquisition module, a mapping module, a calibration triggering module, a virtual value generation module, a data identification module and a verification module. The parameter acquisition module synchronously acquires a concentration measurement value and a concentration measurement value of a smoke oxygen meter at a smoke outlet through two independent communication channels to generate corresponding () data pairs; and the mapping module can select () data pairs in a specific time window and perform linear regression analysis on the () data pairs to determine the concentration measurement values and the mapping values of the concentration measurement values. According to the invention, continuous concentration data can be generated through the virtual value generation module during calibration, and the problem of data blank segments in the calibration process of an analyzer in a traditional CEMS is solved.

The application relates to a finger pulse oxygen optical signal simulation method, a test method and a system based on dynamic pressure feedback. The application introduces dynamic pressure feedback, adopts unequal attenuation constants to perform differential amplitude attenuation modulation on red light and infrared light channels, solves the problem that an output signal of an existing simulator is too idealized, and improves the accuracy of pulse blood oxygen meter test and calibration.

1. Name of the product in this design: Faucet Oxygen Generator. 2. Purpose of this design: This design is used for disinfection and sterilization when installed on a faucet. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

1. The name of the design product: blood oxygen meter. 2. The use of the design product: for monitoring the oxygen content in human blood. 3. The design points of the design product: the shape of design 1, the combination of shape and color of design 2. 4. The picture or photo that best indicates the design points: the perspective view of design 1. 5. Design 1 is designated as the basic design. 6. Other circumstances that need to be explained: design 2 of the design to be protected contains color.

The oxygen-enriched combustion system of the thermal oxidation type ceramic roller kiln is composed of an air compression unit, a membrane method oxygen making unit, a front cooling unit, a rear heating unit, a grading air distribution unit and an intelligent control system. The oxygen-enriched air is distributed to the roller kiln in the form of main combustion air and combustion-supporting air through graded air distribution and is brought into the roller kiln through waste heat of compressed air, meanwhile, the ratio of the oxygen-enriched air to fuel is automatically controlled by means of accurate regulation and control and real-time control of the intelligent control system on the electromagnetic valve and the oxygen meter, and the oxygen-enriched air is supplied to the roller kiln in the form of main combustion air and combustion-supporting air. According to the high-temperature oxygen-enriched kiln, sufficient combustion is achieved in the high-temperature oxygen-enriched environment, the heat efficiency in the kiln is improved, meanwhile, a constant and controllable high-temperature area is kept, the quality of products produced in the kiln is improved, nitric oxide generated in the combustion process is reduced, the emission reduction effect is greatly improved, meanwhile, the pollution discharge cost can be reduced, and practicability is high.

The invention relates to an oximeter adjusting method and device.The method comprises the steps that light intensity data corresponding to a target finger are obtained, a light intensity data set is formed, and the light intensity data are light intensity data which are detected by a light receiving component of an oximeter and penetrate through the target finger; calculating parameter information corresponding to the light intensity data set according to the state information corresponding to the light intensity data set; and adjusting the signal amplification factor of a light receiving component of the oximeter according to the parameter information. According to the oximeter adjusting method and device provided by the invention, the parameter information obtained according to the light intensity data is compared with the preset range, and when the parameter information does not fall into the preset range, the signal amplification factor of the light receiving component of the oximeter is at least adjusted; the influence of human body factors such as skin color and finger thickness and environmental factors on the accuracy of the measurement result of the oximeter is eliminated, and higher measurement accuracy and faster stable value obtaining of the oximeter are achieved.

The utility model discloses a portable pressurizing cabin control device which comprises a control box cover and a control box body covered with the control box cover, an industrial control touch screen and an industrial control all-in-one machine are arranged in the control box cover, and an oxygen inlet connector, an oxygen meter, an oxygen valve and an oxygen pressurizing connector are fixed in the control box body. An oxygen meter is arranged on a pipeline between the oxygen inlet connector and the oxygen valve, and an in-cabin gas sampling inlet connector, an in-cabin gas detector, a mask gas sampling inlet connector, a mask gas detector, an electrical connector, a gas source inlet connector, a gas source meter, a pressurization valve and a pressurization inlet connector are fixed in the control box body. A gas source meter is arranged on a pipeline between the gas source gas inlet connector and the pressurization valve, a pressure reduction gas outlet connector, a pressure reduction valve and a pressure reduction silencer are fixed in the control box body, and the electrical connector, the oxygen meter, the cabin gas detector, the mask gas detector, the gas source meter and the industrial control touch screen are electrically connected with the industrial control all-in-one machine. According to the utility model, the treatment efficiency and effect are improved.

The application discloses a high-pressure multi-element mixed gas preparation system, which comprises an upper computer, a lower computer, a first gas source control pipeline, a second gas source control pipeline, a binary mixer, a first oxygen meter, a binary buffer, a pressure boost control pipeline and a gas storage tank. According to the set mixed gas proportioning concentration of each gas, the corresponding matched gas target flow can be obtained to control the opening of the gas flow regulating valve on each gas source control pipeline, so that the gas in each gas source control pipeline can flow according to the corresponding matched gas target flow, and according to the continuous flow gas distribution mode, the various gas components in the mixed gas are continuously filled into the mixed gas cylinder in a certain proportion for mixing and gas distribution through the flow control of various gases, and the accurate and stable output of the mixed gas is realized. The mixed gas oxygen concentration control range is 0.4% to 40%, and the control precision is ±5% of the oxygen concentration target value.

The invention relates to the technical field of microbial culture equipment, and discloses an operating environment simulation device for nitrifying bacteria resuscitation, the operating environment simulation device for nitrifying bacteria resuscitation comprises a box body, the box body is provided with a simulation assembly, and the simulation assembly comprises a water outlet pipe. According to the operating environment simulation device for nitrifying bacteria recovery, in order to enable the device to adapt to the core requirement of efficient nitrifying bacteria recovery, the simulation assembly is arranged and matched with the water inlet pipe and the water outlet pipe to control water flow through a valve, sewage can be introduced or a carbon source and alkalinity can be supplemented, and the actual working condition of a sewage treatment system is met; a pH meter, a dissolved oxygen meter and a thermometer of the detection module monitor core parameters in real time through a detection rod, a heating device controls the temperature, an air inlet pipe uniformly supplies air to multiple groups of aeration pipes through a shunt pipe, the content of dissolved oxygen is rapidly adjusted, a bottom filter plate bears activated sludge, an inclined plate guides water flow to make full contact with the sludge, and the air inlet pipe is fixed through a limiting cylinder to ensure stable aeration.

The utility model relates to the technical field of water body oxygen concentration detection, in particular to an automatic water body oxygen concentration detection device which comprises a box body and a dissolved oxygen meter, the dissolved oxygen meter is fixedly connected to the middle of the upper end of the outer wall of the box body through a support, and an automatic water body oxygen concentration detection structure is arranged on the right side of the outer wall of the box body. A position adjusting structure is arranged on the left side of the outer wall of the box body. According to the automatic water body oxygen concentration detection device, through the automatic water body oxygen concentration detection structure, the motor is started to drive the worm to rotate in the box body through the bearing, the worm rotates to drive the worm gear to rotate in the box body through the bearing, and the worm gear rotates to drive the spool to rotate in the box body through the bearing, so that a cable wound on the outer wall of the spool can be unfolded through the spool; the motor is used for finally driving the detection head to lift and move, the detection head is conveyed into a detection water area and withdrawn, manual operation steps of workers are reduced, automation is achieved, the operation process is more convenient, and practicability is effectively improved.

The invention discloses a nuclear power unit water supply oxygenation system inertia time measuring method and a related device. The method comprises the following steps that the theoretical oxygenation concentration M0 of a unit in the current state is calculated according to the oxygenation amount of an oxygenation device and the flow measured by a flow meter, and the downstream dissolved oxygen concentration actually measured by an online dissolved oxygen meter is N0; (2) starting from the moment T1, adjusting the opening degree of an oxygen adding control valve, increasing the theoretical oxygen adding concentration M1 to be twice of the initial set oxygen adding concentration M0, maintaining the valve position of the oxygen adding control valve to be stable, and recording the current moment T2; 3) after the dissolved oxygen recorded by the online dissolved oxygen meter rises and is stable, recording the time T3 when the dissolved oxygen starts to rise, the time T4 when the dissolved oxygen rises to N1, the time T5 when the dissolved oxygen rises to N2 and the time T6 when the dissolved oxygen is stabilized at a final stable value N3, and N1 = 120% * N0; n2 = 90% * N3; and 4) calculating the inertia time delta Ts of the water supply and oxygenation system. The method and the related device can be used for measuring the inertia time of the water supply and oxygenation system of the nuclear power unit, and the accuracy is high.

The utility model discloses a kind of breeding information monitoring devices, it is related to breeding detection technical field, including protective shell, protective shell bottom is fixedly installed with positioning ring seat, positioning ring seat is fixedly installed with connecting support leg on, connecting support leg is fixedly installed with telescopic prop on, detection mechanism is equipped in protective shell, detection mechanism includes the positioning support fixedly installed in protective shell, driving rack is movably installed on positioning support, driving rack one side is rotatably installed with driving gear, driving rack lower end is fixedly installed with positioning seat, dissolved oxygen meter probe is fixedly installed on positioning seat, flushing mechanism is connected on positioning support, driving gear is fixedly installed with movable shaft, movable shaft is equipped with planetary reducer. The breeding information monitoring device, detection mechanism can replace artificial automatically with dissolved oxygen meter probe into breeding pond and detect, flushing mechanism can flush clean sundries on dissolved oxygen meter probe.

1. The name of the design product: clip type blood oxygen meter. 2. The use of the design product: for detecting human blood oxygen. 3. The design points of the design product: the combination of shape, pattern and color. 4. The picture or photo that best shows the design points: perspective view. 5. The design claimed contains color.

The application discloses a vacuum isothermal forging process and device suitable for high-temperature titanium-based materials, relates to the technical field of isothermal forging, and comprises a heating furnace, a male die is connected with a pressure head through high-temperature bolts, and a female die is fixedly connected with a die base through high-temperature bolts; a discharging device is arranged on the lower wall of the heating furnace, so that blank feeding and formed forging taking-out are facilitated; a vacuum pump set and an oxygen meter device matched with the heating furnace can realize monitoring of a vacuum environment and oxygen content in the furnace in the isothermal forging process; the device can guarantee that the whole process from blank and die heating to subsequent forging processes is completely closed, can guarantee the precision and performance of a final formed piece, and has the effects of prolonging the service life of the die and the like. The device can realize almost all heat treatment processes involved in conventional heat treatment and can realize true vacuum isothermal forging.

Disclosed are: a packaging body configured so that even if an oxyalkylene group-containing PVA-based resin is stored for a long period of time in a state of the packaging body, the oxyalkylene group-containing PVA-based resin is unlikely to cause a problem of thickening during melt kneading; and a manufacturing method of the packaging body. The packaging body is obtained by housing the oxyalkylene group-containing PVA-based resin in a bag body, the bag body being configured so that the permeation amount of oxygen is 1 m 2 The oxygen permeation degree of the film of the oxygen meter is 1000 cc / m 2 ·day·atm or less. In the packaging body, oxidation of the oxyalkylene group-containing PVA-based resin is inhibited, and generation of a carboxyl group-containing compound, which is a main cause of thickening during melt kneading, is inhibited.

The invention discloses an oxygen meter convenient to operate, which comprises an oxygen meter body and a remote control handle, and telescopic pipe rods are fixedly arranged on the outer side of the oxygen meter body close to the two ends. Belongs to the technical field of oxygen meter structures, the arranged telescopic pipe rod enables the oxygen meter to be placed in pipelines with different thicknesses, the power frame wheel can drive the oxygen meter to move back and forth in the pipelines so that the oxygen meter can reach a specified oxygen measuring area in the pipelines, and the arranged oxygen meter body can be bent under the action of external force so that the oxygen meter can be placed in the pipelines. The oxygen measuring instrument can adapt to pipelines with different bending shapes through the oxygen measuring instrument body, air in an oxygen measuring area can more quickly enter the oxygen measuring instrument to be detected through the arranged air inlet funnel, the tested air is exhausted out of the pipeline along the exhaust pipe, the detection result is prevented from being influenced, and the detection efficiency is improved. The arranged remote control handle enables a display screen, a control key and an indicating lamp which are originally arranged on the surface of the surveying and mapping instrument to be combined on the handle, so that the surveying and mapping instrument is more convenient and flexible to control.

The invention discloses a pulse oximeter simulation system. The system mainly comprises a microprocessor, an information interaction module, a simulation finger module, a plurality of current-voltage converters, a plurality of digital-to-analog converters, a plurality of signal amplifiers and a plurality of analog switches. The simulation finger module is located between the light-emitting tube and the light receiver, comprises a red light receiver and an infrared light receiver, and is used for receiving light signals emitted by the target oximeter and converting the light signals into current signals. Through a series of converters, the current signals are converted into voltage signals, and the state of the analog switch is controlled according to the received infrared light signals. The information interaction module allows a user to input parameters such as finger thickness, oxyhemoglobin saturation and pulse rate so as to determine a perfusion coefficient, and signal conversion is performed by using a calibration curve. Finally, a simulation signal generated by the system is used for adjusting the brightness and the flicker mode of the red light emitting tube, so that effective simulation of the oximeter is realized. According to the invention, the output signal error caused by the parameter difference is relatively small.

The invention relates to the field of pediatric oxygen meters, and discloses a pediatric oxygen meter safety fixing device with buffering protection and anti-falling functions, the pediatric oxygen meter safety fixing device comprises a support and a wall surface, the tooth end of a first outer tooth frame is in meshed connection with a plurality of first gears, and the inner wall of the support is rotationally connected with a plurality of first threaded rods; two first rubber pads are installed on the outer wall of the first movable frame, the outer walls of the first rubber pads are slidably connected with an oxygen meter, one end of a first connecting rod is fixedly connected with a first worm gear, one end of a first rotating rod is fixedly connected with a first worm, a fixing assembly is arranged on the inner wall of the support, and a buffering assembly is arranged on the outer wall of the support. A plurality of gears are driven through meshing of a worm and a worm wheel and an outer tooth frame, a transmission structure is formed by the gears, a rotating rod, a connecting rod and threaded rods, a rotating block drives the four threaded rods to rotate synchronously through the structure, a movable frame moves inwards, a plurality of rubber pads are tightly attached to the outer wall of the oxygen meter, and the effect of installing different brands of oxygen meters is achieved.

The utility model relates to the technical field of oxygen meters, in particular to an anti-collision industrial oxygen meter which comprises a movement, a connector, a protection plate and a protection sleeve, the surface of the movement is covered with a tempered glass plate, the protection plate is arranged at the bottom of the movement, and the protection plate and the movement are connected through a plurality of buffering assemblies. The protective sleeve is arranged on the outer side of the machine core in a sleeving mode, the buffer assembly upwards penetrates through the protective sleeve, the upper end face of the protective sleeve is higher than the plane where the tempered glass plate is located, and the connector is arranged on the outer wall of the machine core and penetrates through a notch in the protective sleeve. Through the arrangement of the protection plate, the protection sleeve and the tempered glass plate, the machine core of the oxygen meter can be protected, the oxygen meter is prevented from being damaged due to impact or collision of external hard objects, through the arrangement of the buffer assembly, the impact of external force can be relieved, and the oxygen meter is further effectively protected.

The application discloses a detection and analysis method of a blood oxygen tester, and comprises the following steps: S1: obtaining a blood oxygen test data set, ① obtaining an actual blood oxygen value of a tester; ② in a dark environment, using the blood oxygen tester to test the blood oxygen of the tester's fingertips, and adjusting the pressure of the blood oxygen tester on the tester's fingertips so that the measured blood oxygen test value is close to or reaches the actual blood oxygen value of the tester; ③ in a weak light environment, using the blood oxygen tester to test the blood oxygen of the tester's fingertips, and obtaining a plurality of blood oxygen test values according to different pressures of the blood oxygen tester on the tester's fingertips, so as to obtain the data set; S2: constructing a compensation model, and taking the test error as E(P); S3: implementing compensation, ① writing the fitted polynomial into the MCU of the blood oxygen tester; ② testing the blood oxygen of a plurality of testers, and obtaining corrected test values; S4: comparing the corrected test values in S3 with the actual values. The application provides a detection and analysis method of a blood oxygen tester, and improves the detection precision.

The present application relates to the field of flue gas desulfurization energy saving technology, disclose a kind of oxidizing fan system, comprising: frequency conversion centrifugal fan unit is input oxidizing air to slurry pool;Calcium sulfite concentration tester obtains calcium sulfite concentration value from slurry pool;Dissolved oxygen meter obtains dissolved oxygen concentration value from slurry pool;When calcium sulfite concentration value≤0.01mmol / L, dissolved oxygen concentration value>0.6mg / L, reduce output frequency;When calcium sulfite concentration value≤0.01mmol / L, dissolved oxygen concentration value<0.6mg / L, improve output frequency;When calcium sulfite concentration value≤0.01mmol / L, dissolved oxygen concentration value is 0.6mg / L, maintain output frequency.The application combines calcium sulfite concentration value and dissolved oxygen concentration value with frequency conversion centrifugal fan unit, adjusts the output frequency of frequency conversion centrifugal fan unit, realizes air volume regulation, and plays the energy saving effect.

1. The name of the design product: blood oxygen meter. 2. The use of the design product: for blood oxygen meter. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses a flexible plastic pipeline oxygen resistance comparison test evaluation platform, which comprises a vacuum degassing deaerator, a copper water segregator, a copper water collector, an oxygen bottle and a group of test barrels, a water outlet of the vacuum degassing deaerator is connected with a water inlet of the copper water segregator through a steel pipe, each water outlet of the copper water segregator is divided into two paths, according to the first path, a water outlet of the copper water segregator is connected with a water return port of the testing barrel through a pipeline, a water outlet of the testing barrel is connected with a water inlet of the copper water collector through a pipeline, and a water outlet in the side portion of the copper water collector is connected with a water return port in the side portion of the vacuum degassing and deoxidizing machine through a pipeline. Circulation is carried out in an oxygen-enriched environment in the test barrel, the content of oxygen in the pipeline is detected through the online dissolved oxygen meter, and if data detected and displayed by the dissolved oxygen meter is small, the oxygen content of the detected pipeline is low, and the oxygen blocking effect of the pipeline is good; if the data detected and displayed by the dissolved oxygen meter is large, the oxygen content of the detected pipeline is high, and the oxygen blocking effect of the pipeline is poor.

The utility model relates to the technical field of medical equipment, and discloses an oxygen gauge outfit support which comprises a first support and a second support, the first support and the second support are connected with a first supporting rod and a second supporting rod, the bottom of the first supporting rod and the bottom of the second supporting rod are connected with a base, and the first support and the second support are U-shaped. The opening directions of the first support and the second support are consistent, and the first support and the second support are located on the same plane. Symmetrical limiting spaces are formed through the first support and the second support, the bottom of a meter head is supported, the two sides of the meter head are limited, stable placement is achieved through a geometric structure, the guide rods incline towards the two sides to expand the openings, quick taking and placement are facilitated, the transverse rod is provided with the identification area, efficacy period management is facilitated, and the U-shaped base is matched with the anti-skid pad to enhance the overall stability. The end limiting rods prevent the gauge outfit from falling off, manufacturing is convenient, the structure is stable, and the problems that an existing gauge outfit is prone to toppling over and inconvenient to take are solved.

The utility model relates to a weighing device, material mixing equipment and a material mixing system. The weighing device comprises a box body with a cavity; the first air inlet pipe is communicated with the cavity, and the first air inlet pipe is provided with a first control valve; the second air inlet pipe is communicated with the cavity and is provided with a second control valve; the pressure relief pipe is communicated with the cavity, and the pressure relief pipe is provided with a pressure relief valve; the oxygen meter is arranged in the box body and is used for detecting the oxygen content in the cavity; the weighing device is arranged in the cavity; one end of the feeding pipe extends into the cavity, and the feeding pipe is used for conveying materials to the weighing device; and one end of the discharging pipe extends into the cavity, and the weighing device is configured to convey the materials to the discharging pipe. According to the weighing device, the rare earth powder can be automatically weighed, the weighed powder is conveyed into the material tank, the working efficiency of weighing is improved, and potential safety hazards during production are reduced.

The utility model discloses an electrochemical oxygen tester calibration device which comprises an installation bottom plate and an installation support, the installation support is fixedly connected to the top of the installation bottom plate, fastening frames are fixedly connected to the two sides of the installation support, an air tank and a test gas tank are symmetrically arranged in the fastening frames on the two sides, and a connector is arranged at the top of the installation support. A holding rod is arranged on one side of the connector, and protective blocks are arranged on two sides of the top end of the mounting support. One side of the fixed frame is movably connected with the movable frame through the rotating shaft, the movable frame is rotated to be closed to drive the locking block to extrude the limiting block to contract, so that the locking block is clamped into the locking groove, the reset spring drives the limiting block to reset on the guide rod, the locking block is clamped into the locking groove in a limited mode, and the fast fastening frame is closed. Meanwhile, protection pads are adhered to the movable frame, the fixed frame and the inner wall of the outer surface to be matched with a top protection block to protect the device, and damage to the device due to falling is reduced.