108 results about "Grain moisture" patented technology

The invention relates to the field of grain drying, and discloses a grain drying energy-saving control system based on intelligent optimization, which comprises the following steps: after warehousing grains are detected, judging whether the water content of the grains exceeds a preset safety threshold value or not by collecting the initial water content of the grains and environment temperature and humidity information; according to the grain moisture content, the grain size distribution and the current environment condition, a multi-section type moisture change trend model fitting the drying process is constructed, and the decrease rate of the grain moisture content and the drying curve form in the future stage are predicted; analyzing the deviation value between the water content change slope and the target drying rate in the prediction curve; judging whether an adjustment potential exists or not by modeling a response relationship among the current hot air temperature, wind speed, heat source power and water content change; and according to the heat energy use analysis result, control instructions of hot air temperature, air speed and air supply modes are automatically generated. The self-adaptive energy-saving grain dryer has the advantage that the self-adaptive capacity and the energy-saving effect in the grain drying process are improved.

The invention provides a corn combine harvester detection control system, and the system comprises a kernel breakage rate detection module which is used for obtaining a kernel breakage rate according to a kernel image; the grain moisture content detection module is used for obtaining the grain moisture content according to the capacitance target value; the grain loss rate detection module is used for acquiring a transient charge signal generated when grains collide with the surface of the PVDF film sensor, conditioning the transient charge signal to obtain a target signal, and determining the grain loss rate according to the target signal; and the data processing and control module is used for obtaining the target kernel breakage rate, the target kernel moisture content and the target kernel loss rate, and outputting an operation parameter control signal of the corn combine harvester according to the target kernel breakage rate, the target kernel moisture content and the target kernel loss rate. According to the application, the kernel breakage rate, the kernel moisture content and the kernel loss rate can be synchronously detected in the operation process of the corn harvester, and automatic closed-loop optimization adjustment of operation parameters is realized.

The invention relates to the technical field of automatic control of grain depots, in particular to a grain depot control system which comprises an automatic control decision module, a grain moisture detection module, a temperature and humidity detection module, a ventilation module and a circulation fumigation module. The grain moisture detection module is used for detecting the moisture of grains in the grain storage warehouse and transmitting the detected grain moisture data to the automatic control decision module; the temperature and humidity detection module is used for monitoring the temperature and humidity in the grain storage warehouse and transmitting the detected temperature and humidity data to the automatic control decision module; the ventilation module is used for receiving an instruction of the automatic control decision module and controlling opening and closing of ventilation equipment of the grain storage warehouse; and the circulation fumigation module is used for receiving the instruction of the automatic control decision module and controlling the operation of fumigation equipment. According to the grain depot control system, the grain storage environment is automatically monitored and adjusted, manual dependence is reduced, efficiency and quality are improved, loss is reduced, and intelligent early warning and data analysis support management are achieved.

The application discloses an online grain moisture detection device and method, which comprises a rack, a volume standard mechanism installed on the rack, a horizontal conveying belt, a baffle, a stepping motor and a plurality of partitions, the stepping motor is connected with the horizontal conveying belt and drives the horizontal conveying belt to move, the baffle is located on both sides of the horizontal conveying belt, the plurality of partitions are arranged on the horizontal conveying belt and respectively enclosed with the baffle to form closed cavities, a microwave detector is installed above the volume standard mechanism, a quantitative feeding mechanism is connected with the volume standard mechanism through a material distributing mechanism, the material distributing mechanism is arranged in an inclined mode, and a controller is connected with the quantitative feeding mechanism, the material distributing mechanism, the stepping motor and the microwave detector respectively. The application further discloses an online grain moisture detection method.

1. The name of the design product: grain moisture meter. 2. The use of the design product: for grain moisture detection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design. 6. Other circumstances that need to be explained: the A component of the left view of design 1 and the B component of the left view of design 2 are both display screens.

The utility model discloses a millstone for a grain moisture test crushing mill in the field of crushing equipment, which comprises a static millstone and a movable millstone, a plurality of gear rings which are of concentric circle structures and can be meshed with each other are respectively arranged on the opposite surfaces of the static millstone and the movable millstone, and a plurality of large gear rings close to the inside are wider and higher than a plurality of small gear rings close to the outside. And a plurality of material guide grooves which penetrate through all the gear rings and divide the gear rings into a plurality of gear blocks are further formed in the opposite surfaces of the static grinding disc and the movable grinding disc. The gear rings and the material guide grooves are arranged on the static grinding disc and the movable grinding disc, materials move outwards along the material guide grooves and gaps among the teeth in the grinding process and are ground by the tooth blocks when passing through the connecting portions of the adjacent gear rings, meanwhile, due to the fact that the gaps of the large gear rings on the inner side are large, large particles are crushed firstly, the gaps of the small gear rings on the outer side are small, and then the particles are ground into powder, and the grinding efficiency is greatly improved. And the powder fineness is ensured, the high powder discharging efficiency is achieved, the problem that the temperature rise is too large due to too fast grinding can be avoided, and the moisture loss in the grinding process is reduced.

The application provides a kind of grain moisture content detection method, device, combine harvester, equipment and medium, the method comprises: collecting the temperature of the environment where grain is located, the relative dielectric constant and bulk weight of grain in a preset period;Based on temperature, relative dielectric constant and bulk weight, train through grain moisture content detection model, obtain the moisture content of grain in a preset period;Through the grain moisture content detection model, periodically detect the moisture content of grain.The grain moisture content detection method provided by the application uses a nonlinear method of multiple influencing factors to regress and predict data, by considering multiple influencing factors, the fitting regression accuracy of the grain moisture content detection model is improved, and the moisture content of grain is periodically detected through the grain moisture content detection model, the moisture content of grain is stably detected for a long time, and the reliability is high, so as to improve the accuracy of grain moisture content detection as a whole.

This utility model relates to the field of grain testing technology and discloses a portable rapid grain moisture analyzer, including a main body, two testing rods, a handle, two protective components, an adjustment component, and an extension component. The two testing rods are symmetrically installed on the left and right sides of one end of the main body. The handle is installed at the center of one end of the main body. The two protective components are respectively disposed on the surfaces of the two testing rods. The adjustment component is disposed on the surface of the handle. The extension component is disposed on one side of the adjustment component. The portable rapid grain moisture analyzer provided by this utility model, with two semi-circular fixing hoops and two arc-shaped sleeves respectively disposed on the surface of the main body with two testing rods, can protect the surface of the testing rods and increase rigidity during insertion and removal operations, preventing deformation and loosening.

The utility model discloses a grain pile deep water retention cooling ventilation device, which comprises a fan, an air distribution box and a plurality of metal ventilation pipes, the fan is connected with an air inlet of the air distribution box, the air distribution box is provided with a plurality of air outlets, each air outlet is connected with one end of one metal ventilation pipe, and the other end of the metal ventilation pipe is connected with the fan. The other end of the metal ventilation pipe is arranged in a grain pile; when the deep sampler is used, the metal ventilation pipes are lowered to the bottom of a grain pile through the deep sampler, the upper ends of the metal ventilation pipes are connected to the air distribution boxes, each air distribution box can be connected with 5-6 metal ventilation pipes, and then a low-power fan is used for ventilation treatment, so that the deep ventilation cooling effect of the grain pile is achieved; therefore, the phenomenon of ventilation dead angles during ventilation and cold storage of the grain storage warehouse can be effectively solved through the metal ventilation pipe, and meanwhile the phenomenon that in order to reduce the phenomenon of local bottom layer heating, excessive loss of grain moisture is caused by using a centrifugal fan or a large amount of cost is generated by adopting a grain cooler can be avoided.

The invention provides a system for measuring the water content of grains by using a capacitance method, and solves the problem that a traditional capacitance method grain water content measuring device is easily influenced by the temperature of a volume density meter. According to the technical scheme, the device comprises a container, an impedance measuring circuit and a temperature measuring circuit; the impedance measuring circuit comprises electrode plates, to-be-measured resistors are formed among the electrode plates, the temperature measuring circuit comprises a temperature sensing unit and an impedance measuring circuit, and the temperature measuring circuit transmits collected information to the main control unit of the active circuit. The main control unit calculates the water content of the to-be-measured grain according to a set instruction set and the obtained impedance value, temperature value and loss factor; the main control circuit further comprises a storage unit for storing information including the instruction set, the impedance value, temperature value, loss factor and measured water content; the system further comprises an upper computer unit, and the upper computer unit is in communication connection with the main control unit through the communication unit, so that the upper computer unit can query historical measured grain water content information.

1. Name of the product in this design: Grain Moisture Analyzer. 2. Purpose of this design: To measure the moisture content of grains. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. Other situations requiring explanation: In the bottom view, part A is a semi-transparent part.

The utility model belongs to the technical field of grain detection equipment, and particularly relates to a grain moisture detection device which comprises a detection box and a microwave moisture detector, microwave sensors of the microwave moisture detector are symmetrically arranged on the two sides of the detection box, a baffle is arranged above the microwave moisture detector, and the microwave moisture detector is arranged above the baffle. A material receiving plate is arranged below the microwave moisture detector, push-pull openings are formed in the positions, corresponding to the baffle and the material receiving plate, of the detection box, and the baffle and the material receiving plate are both arranged in the push-pull openings and installed on the detection box through two push-pull assemblies in a push-pull mode. Through a large number of experiments, the applicant finds that after grains fall into the detection box and the upper part and the lower part of a grain area detected by the microwave moisture detector are shielded, a detection space is formed between the baffle and the material receiving plate, the detected grain moisture content of the grains in the detection space is consistent with the actual grain content, and the detected grain moisture content is more accurate.

The present application provides a kind of detection method of distiller's grains moisture content based on near infrared spectroscopy, through the measurement of near infrared reflectance spectroscopy, data preprocessing and analysis are carried out by combining physicochemical metrology method, establish the prediction model of distiller's grains moisture content, and then realize the fast and accurate measurement of distiller's grains moisture content.The advantage of the present application is that it can realize rapid, nondestructive testing and does not consume chemical reagent detection, near infrared spectroscopy testing means has good test stability, the detection result has higher repeatability, and in near infrared wave band, test signal can be transmitted in optical fiber at a distance, so that through optical fiber, remote data transmission can be carried out, realize the automation and integration of entire detection process, and multi-channel signal can be realized parallel processing, greatly save the test cost.

The invention discloses an online nondestructive detection method for grain moisture. The method comprises the following steps: step a), acquiring frequency data generated by a parallel polar plate device; b) acquiring environmental data such as temperature and humidity data and CO2 concentration data acquired by an environmental monitoring sensor in the closed channel; c) acquiring strain data generated by a pressure strain gauge on the inner side of the top of the closed channel; step d), calculating the moisture content of the grain based on the frequency data; a plurality of groups of parallel polar plate devices are arranged, one group of parallel polar plate devices are positioned in the closed channel, and the other parallel polar plate devices are positioned in the through channel which is through up and down; the water content is calculated by taking frequency data generated based on the parallel pole plate device in the closed channel as a basic frequency and based on frequency data generated based on other parallel pole plate devices; and e) correcting the moisture content by using the environmental data and the strain data to obtain real-time moisture content data. The detection method provided by the invention can accurately detect the moisture content of the grains.

This utility model relates to the field of grain processing and discloses a moisture-proof storage device for grain processing, comprising: a grain moisture-proof storage silo, wherein a moisture-proof mechanism is provided on the grain moisture-proof storage silo; the moisture-proof mechanism includes a circular box, an air pump, a top box, a desiccant container, a sealing rod, a servo motor, a first rotating tube, and a second rotating tube; the circular box is fixedly installed on the top of the grain moisture-proof storage silo, the air pump is fixedly installed on the top of the circular box, the top box is fixedly connected to the circular box, the desiccant container is snapped into the top box, the sealing rod is slidably installed on the grain moisture-proof storage silo, the servo motor is fixedly installed on the bottom of the grain moisture-proof storage silo, the output end of the servo motor is fixedly connected to the first rotating tube, and the first rotating tube is fixedly connected to the second rotating tube. This utility model has the following advantages and effects: it allows the grain to have a larger contact area with the air, fully receiving ventilation treatment, thereby increasing the storage time of the grain in the middle of the storage silo.

The invention discloses a grain moisture monitoring method, device and equipment based on detection wave analysis and a medium, and the method comprises the steps: controlling a driver to drive a detection radar to scan stored grains through a scanning instruction, receiving echo signals obtained through scanning, and carrying out the preprocessing of the echo signals to obtain corresponding processing signals, and performing feature extraction on the processed signal by combining the distance value and the air pressure value to obtain a corresponding signal feature, calibrating the signal feature according to the temperature value to obtain a calibration feature, and performing feature analysis to obtain a corresponding moisture monitoring value. According to the grain moisture monitoring method based on detection wave analysis, the stored grains can be scanned through the detection radar, and the echo signals are analyzed and processed to accurately obtain the moisture content in the grains, so that the moisture monitoring efficiency and reliability are greatly improved, and meanwhile, the accuracy of detecting the moisture in the grains is improved.

1. The name of the design product: grain moisture meter guide support. 2. The use of the design product: for grain guide. 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 relates to the technical field of grain detection, in particular to a moisture tester for measuring grain moisture, which comprises a detector, a feed pipe and a convenient device, the feed pipe is placed on a feed port of the detector, the convenient device is arranged on the surface of the detector and comprises a guide channel, the guide channel is fixedly connected with the upper surface of the detector, and the detector is arranged on the guide channel. And the guide channel is located on one side of the feeding pipe, the surface of the guide channel is slidably connected with an abutting block, and the abutting block makes contact with the upper surface of the detector. According to the utility model, by arranging the convenient device, the condition that the feeding pipe is inclined or clamped in the mounting process is effectively reduced, when the moisture tester is used, the propping block and the sleeve block are adjusted, so that a worker does not need to spend a lot of time to mount the feeding pipe, the practicability of the moisture tester is improved, the auxiliary property of the moisture tester is improved, and the labor intensity of the worker is reduced. The convenience of mounting the moisture tester by a worker is improved, and the condition that the feeding pipe is inclined or clamped in the mounting process is reduced.

The utility model discloses a tray grain uniformizing device for a grain moisture detector. At present, when a grain sample on a sample tray is subjected to moisture detection, the thickness of the grain sample on the sample tray cannot ensure that the thickness of each area is uniform, so that the detection result is influenced. The device comprises a grain cover, outer supporting plates, a positioning rubber column, a rotating plate, a downward pressing inserting rod and a pressing plate, a cover body on the outer side of the grain cover is connected with a set of outer supporting plates, the lower portion of each outer supporting plate is vertically and fixedly connected with the positioning rubber column, and the grain cover is supported through the positioning rubber column; an inserting barrel is integrally connected and fixed to the center of the top of the grain cover, a pressing-down inserting rod is inserted into an inserting hole in the inserting barrel, and the top of the pressing-down inserting rod is perpendicularly and fixedly connected with the center of the bottom of the rotating plate. According to the tray grain layer uniformizing device, the problem that the thickness of sample grains on the sample tray is uniform can be solved. The method is applied to the field of grain detection.

A grain moisture detection device relates to the technical field of grain detection. The special bearing of the right transmission shaft is located on the side close to the roller, a special bearing seat is provided with a seat hole for installing a bearing outer ring, a notch is formed in the right side of the seat hole of the special bearing seat, the special bearing comprises a standard bearing inner ring, a roller and a special outer ring, and the special outer ring extends out of the notch and then is provided with a V-shaped arm. The other end of the V-shaped arm abuts against the limiting block A. The bending part of the V-shaped arm is pasted with a strain gauge. The device has the beneficial effects that the position for detecting deformation is placed on the specially-made outer ring of the specially-made bearing, deformation during grain particle rolling is directly detected, the problem that the detection precision is not enough due to the fact that a gap between the bearing outer ring and the bearing seat cannot be eliminated in the original detection process is solved, meanwhile, the deformation is amplified through the V-shaped arm of the specially-made outer ring, and the detection precision is improved. And the detection precision is further improved.

The invention provides a pet feeding device which comprises a base structure and a feed tray mounted on the front side of the base structure, a feed bin is arranged at the top of the base structure, a first discharge hole is formed in the bottom of the front side of the feed bin, a fixed isolation plate is arranged in the feed bin, and a second discharge hole is formed in the rear side of the isolation plate; a rotary discharging vibration flattening mechanism is arranged between the base structure and the stock bin, a butt joint groove is formed in the arc-shaped notch groove, a magnetic block matched with the butt joint groove is arranged on the rear side of the material disc, and a material leakage preventing mechanism used for sealing the first discharging hole when the material disc is not installed is further arranged between the base structure and the stock bin. According to the device, quantitative discharging can be achieved through alternate grain feeding and discharging of the temporary storage barrels, the bin is kept sealed in the grain discharging state and the non-grain discharging state, and grain materials are prevented from being affected with damp; the material disc installation triggering structure is in linkage with the material leakage prevention mechanism to open and close the discharging channel, the problem of grain falling caused by misoperation is effectively prevented, and meanwhile blockage is prevented through cooperation of the material stirring structure and the vibration sliding plate.

The invention relates to the technical field of grain drying, in particular to agricultural product grain rapid drying equipment and method.The agricultural product grain rapid drying equipment comprises a multi-layer tower body, a hot air system used for drying grains in the tower body is assembled on the surface of the tower body, a multi-layer drying chamber is assembled in each layer of tower body, and a plurality of sets of angular pipes are assembled in each drying chamber; the lower end of the drying chamber is provided with a detection assembly used for detecting the grain moisture value in the drying chamber. By arranging the sampling outer pipe, the sealing half pipe and the protection pipe, the detection probe is located in the sampling outer pipe and the sealing half pipe in a non-detection state to prevent the high temperature from influencing the service life and the detection accuracy, and the detection probe is located in the protection pipe in a material taking state to prevent the high temperature from influencing the service life and the detection accuracy; grain enters the sampling outer pipe and the sealing half pipe to be subjected to static detection, the moisture value detection accuracy of the grain is guaranteed, and then the device is matched with a hot air system to guarantee a better drying effect.

The utility model relates to the technical field of feed grain processing, and discloses a damp-proof feed grain storage bin which comprises a bin body with a rectangular cross section, a grain inlet ventilation pipe arranged at the top of the bin body and a bin top arranged at the top end of the bin body. A first partition plate is horizontally arranged in the middle of the bin body, a moving groove is formed in the first partition plate, a second partition plate is movably arranged in the moving groove, the second partition plate can be movably attached to the side, away from the first partition plate, of the bin body, and a pushing mechanism used for pushing the second partition plate is arranged on the bin body. The utility model has the effect of reducing grain waste.

The utility model discloses a sealing waterproof structure for grain storage equipment, and relates to the technical field of grain storage. The feeding device comprises a storage bin and a feeding port, a sealing plate is inserted into the top of the feeding port, a supporting rod is fixedly connected to the bottom of the sealing plate, a sliding ring is slidably connected to the outer surface of the supporting rod, a spring is arranged on the side, close to the sealing plate and the sliding ring, of the outer surface of the supporting rod in a sleeved mode, and a sliding groove is fixedly connected to the bottom of the supporting rod. Sliding blocks are slidably connected to the inner walls of the sliding grooves, connecting rods are rotatably connected to the tops of the sliding blocks and the outer surfaces of the sliding rings through pin shafts, the sliding rings slide downwards through the arrangement of sealing plates, specifically under the elastic force action of springs, the two connecting rods are far away from each other, and then the sliding blocks at the bottoms of the connecting rods slide towards the sides far away from the supporting rods; the problems that an existing grain storage device is poor in sealing and waterproof performance, grains are prone to being affected with damp and mildewing, and the human health is threatened are solved.

The utility model discloses a device for measuring the moisture content of grain, including container, electrode plate still includes the printed circuit board for installing the control circuit of bearing, the middle part of container is provided for loading temperature sensing unit's temperature measurement stick, the downward extension of container forms a plurality of stand, each stand forms the space for placing the installation printed circuit board below the container. The utility model discloses when using, compared with traditional pin type grain moisture tester, the structure arrangement of this scheme is relatively simple, need not be limited to fixed instrument operating platform, and the layout structure is more reasonable, and the cost is reduced significantly, has good popularization prospect.

The utility model discloses a grain-saving and consumption-reducing bulk grain conveyor which comprises a machine body and a moving assembly located at the lower end of the machine body and further comprises a framework, a shielding tent, a feeding hopper and a discharging barrel. A plurality of frameworks are uniformly and detachably connected to the upper end of the machine body; the shielding tent covers the plurality of frameworks, and the two ends of the shielding tent in the length direction are detachably connected with the machine body; the lower end of the machine body is detachably connected with a feeding hopper, and the upper end of the machine body is detachably connected with a discharging barrel. The grain conveying device has the advantages that the framework is detachably installed at the upper end of the machine body and covered with the shielding tent, in the grain conveying process, due to the fact that the conveying channel is covered with the shielding tent, grains cannot fall off from the peripheral edge of the conveying belt, and loss of the grains in the grain conveying process is prevented; grain moisture is not lost, so that the grain quality is ensured; and as the grains do not fall off, workers do not need to spend a lot of energy on collecting the grains on the ground.

The invention discloses a water content prediction correlation model training method and a grain water content prediction method. The training method comprises the steps of obtaining a water content training sample; training the initial moisture content prediction model based on the moisture content training sample to obtain a moisture content prediction model; obtaining a water content correction training sample; and training the initial water content correction model based on the water content correction training sample to obtain a water content correction model. Based on the water content training sample and the water content correction training sample, a comprehensive data support fitting an actual storage scene is provided for model construction; a moisture content prediction model adaptive to a static storage scene is obtained through training, then a moisture content correction model adaptive to a dynamic scene is trained by relying on a correction sample, upgrading from static prediction to dynamic and static combined prediction is achieved, and the bottleneck that a traditional model is difficult to cope with storage environment changes is broken through; the real-time performance and reliability of moisture content prediction are improved, and a scientific data basis is provided for safe storage of grains.

The utility model discloses a drying device for seed processing. The drying device comprises a device body and a discharging assembly. The device body comprises a dryer and a bucket elevator on the two sides. According to the drying device for seed processing, the material box is installed at the bottom of the drying machine, seeds can be collected into the material box firstly after being dried, moisture detection is conducted on the seeds in the material box through the grain moisture measuring instrument, and therefore qualified seeds are discharged through the discharging pipe and unqualified seeds are conveyed into the material hopper through the material returning pipe; meanwhile, a left storage cavity and a right storage cavity are formed in the two sides of the partition plate in the material box, and a gear ring, a binding cylinder and a semicircular disc are installed between the material box and the discharging hopper, so that the seeds are conveyed into the drying machine again through the bucket elevator to be dried, and then the seeds are detected in time after being dried, and the uniformity of the dried seeds is guaranteed; and the left storage cavity and the right storage cavity on the two sides in the material box can be adjusted and alternately used, so that the situation that the use of the dryer is affected by unqualified returned materials dried in the material box is avoided.

To provide a grain moisture meter that makes it easy to store and carry accessories such as sample dishes, and reduces the risk of loss. [Solution] The grain moisture meter 10 comprises at least an upper electrode and a lower electrode positioned opposite each other at a certain distance apart, and a sample dish 3 sandwiched between the upper electrode and the lower electrode. A predetermined amount of sample grain G collected in the sample dish is pressurized and crushed between the upper electrode and the lower electrode, and an electric current is passed through it to determine the amount of moisture contained in the sample grain. The moisture meter body 11 is provided with a storage section 9 for holding the sample dish. The storage section 9 is a recess formed so as to be recessed inward on the bottom surface of the moisture meter body, and it holds the sample dish in a detachable manner. The storage section for holding the sample dish is integrally provided on the moisture meter body, which is the housing, and is configured to be easily detachable, so the sample dish is not separated from the moisture meter body and is always stored and carried together, significantly reducing the risk of losing the sample dish.

The utility model discloses a grain moistureproof storage equipment, including barrel body, the top of barrel body is symmetrically provided with exhaust structure, each exhaust structure includes exhaust pipe, top plate, air block, motion bar, return spring, limit plate, anti-drop plate, the bottom end of exhaust pipe of each exhaust structure is communicated with the top of barrel body, and the top plate of each exhaust structure is communicated with the top of barrel body. The top end of each exhaust pipe makes contact with a top plate, the bottom of each top plate is fixedly connected with an air blocking block, each air blocking block is connected with the inner wall of an upper end opening of the corresponding exhaust pipe in an inserted mode, movable rods are symmetrically arranged at the bottom of each top plate, and the top end of each movable rod is fixedly connected with the corresponding top plate. And each movable rod is slidably connected with a limiting plate, the bottom of each limiting plate is in contact with a reset spring, the bottom end of each reset spring is in contact with an anti-falling plate, and one side of each limiting plate is fixedly connected with an exhaust pipe. Gas in the device can be automatically exhausted, and manual operation is not needed.