127results about How to "Equipment is small" patented technology

The present invention provides an electrochemical oxidation technique of waste water containing chlorobenzene compound, which is carried out in an electrocatalysis reaction tank, wherein a titanium-base bimetal lead oxide electrode modified by fluoro resin serves as the anode, a corrosion resistant plate serves as the cathode, an active beehive ceramic particle electrode is filled between the anode and the cathode, the waste water containing chlorobenzene compound serves as the electrolyte, a pulse direct current stabilized current power supply is adopted, thereby the chlorobenzene compound of the waste water is removed. The active beehive ceramic particle electrode is composed of Mn, Sn and Sb active component and a gamma-Al2O3 beehive ceramic carrier. The present invention has the advantages of compact equipment, excellent stability, low operating cost, easy operation and simple post treatment; besides, the present invention has a major market development prospect.

The invention provides a radio frequency energy acquisition circuit system comprising a rectification circuit which is used for converting a radio frequency signal into a DC signal; and a voltage-boosting circuit which is connected with the rectification circuit and used for performing voltage boosting on the DC signal and outputting a voltage value. Radio frequency energy in the environment is acquired and converted into constant voltage capable of being used by equipment so that a battery part in the equipment is substituted, equipment volume is reduced and the service life of the equipment is prolonged. Besides, a voltage detection module is additionally arranged so that a characteristic of intermittent operation among circuits is realized and power conversion efficiency is enhanced.

The invention provides a test system used for a satellite power supply and distribution system. The system comprises a control module, a PXI module, a stabilized power supply, and a sun square matrix simulator. A man-machine interaction unit is used for receiving instructions input by external users and sending instructions for a control unit. The control unit controls the PXI module, the stabilized power supply, and the sun square matrix simulator to complete data acquisition according to the received instructions. The PXI module, the stabilized power supply, and the sun square matrix simulator realize data acquisition according to the instructions, and feed back acquired data to the man-machine interaction unit. The system solves problems that the number of moonlet ground test devices is large, volume of the devices is large, versatility is bad, and design and development period are long.

The present invention relates to wastewater advanced treatment equipment and a method for a catalytic ozonation membrane reactor and belongs to the field of wastewater treatment. The method comprises the steps of pretreating to-be-treated organic wastewater by means of a pre-processed filtering device and then leading the organic wastewater to one side of the catalytic ozonation membrane reactor; leading the ozone-containing gas to the other side of the membrane reactor at the same time; diffusing the ozone to the wastewater side through a hollow fiber membrane in the membrane reactor; and initiating the catalytic oxidation reaction between the surface of the membrane with a catalytic function layer and organic compounds in the wastewater. The above catalytic ozonation membrane reactor is immersed type and the membrane thereof is in the form of an oxidation-resistant hydrophobic hollow fiber organic catalytic membrane. The catalytic function layer of the membrane is at the surface of the membrane. Heterogeneous catalyst articles are adopted as the load. By means of the method, degradation-resistant industrial wastewaters in the fields of dyes, petrochemical engineering, pharmaceuticals and the like can be effectively treated. Meanwhile, the size of the reactor is reduced, and the length of the process route is shortened. The ozone transfer and the oxidation rate are increased. Moreover, the loss during the ozone transfer and reaction process is reduced.

The invention relates to a signal light power detection instrument and a detection method, the instrument is used to detect the power of a light signal transmitted in an optical network, wherein, a noise source exists in the optical network and the instrument is positioned at the receiving terminal in the optical network and includes: a photoelectric conversion and amplifying device, which is used to receive the light signal, convert the signal into an electrical signal and to amplify the electrical signal; a filter circuit, which is used to receiving the amplified electrical signal, to conduct high-pass filtering to filter the low frequency noise in the amplified electrical signal, and to output a high-frequency signal; and a high-frequency power detection circuit, which is electrically connected with the filter circuit, used to detect the power of the high-frequency signal to determine whether a high-frequency signal is available and/or the power value of the high-frequency signal. By making use of the filter circuit and conducting detection at the receiving terminal, the invention doesn't need establish a protocol among nodes, and doesn't need special light modulation technology. The invention has the advantages of strong adaptability, small instrument volume, low cost and fast scanning velocity, and can realize the same signal detection effect depending on the actual stateof different systems.

A process for preparing the free hydroxy radicals includes such steps as flowing water thorugh Venturi jet tube to activate it, dissolving ozone in the activated water, and plasma chemical reaction. Its advantages are high concentration and high output.

The invention belongs to the distance measurement navigation application and unmanned plane technology field and discloses a self-driving tour control system and method based on an unmanned plane. The system comprises a user terminal, a vehicle roof rising and landing platform and an unmanned plane terminal. According to the system, unmanned plane high precision position determination is realized through multi-point optimization configuration UWB high precision distance measurement, an unmanned plane docking platform is constructed, autonomous docking of the unmanned plane is realized, and autonomous flight is further realized; based on the docking platform, intercommunication between the platform and a handset is further realized, and intercommunication of data and images acquired by the unmanned plane with the user handset is realized; through a connection function between the platform and the handset, accurate landing, cruising and destination picture taking of the unmanned plane can be accurately commanded by a user through a handset map; autonomous charging of the unmanned plane can be realized through platform docking. The system is advantaged in that the required equipment volume is smaller, mass is lighter, power consumption is lower, improvement of travel experience of a driver can be facilitated, and self-driving tour contents are enriched.

The invention provides a device and method for monitoring the neutral point earthing of a secondary winding of an electric power current and voltage mutual inductor. The device comprises a detection amplification module, a judgement processing module, a control circuit and an alarming circuit, wherein the detection amplification module is used for detecting and amplifying a current in the neutralpoint earthing wire of the secondary winding of an electric power current and voltage mutual inductor; the judgement processing module is used for judging whether the amplified current reaches an alarming current threshold value; if the amplified current reaches the alarming current threshold value, a control circuit switch is triggered to be closed; the control circuit comprises the control circuit switch and an alarm starting unit, the control circuit is conducted when the control circuit switch is closed, and the alarm starting unit triggers an alarming circuit switch to be closed; the alarming circuit comprises the alarming circuit switch and an alarm indicator light; and when the alarming circuit switch is closed, the alarming circuit is conducted, and the alarm indicator light is lightened. According to the device and the method provided by the invention, the neutral point earthing condition of the secondary winding of an electric power current and voltage mutual inductor can bemonitored in real time, the device gives out an alarm in time if multiple-point earthing is found, and maintenance staff are notified to process the earthing condition, thereby the potential safety hazard is eliminated.

The invention discloses a flaky medium conveying mechanism, which comprises at least two conveying channels and a transitional conveying channel connecting the conveying channels, wherein the two sides of each of the conveying channel and the transitional channel are provided with conveying belts and/or conveying group wheels for clamping and conveying the flaky medium; and the at least two conveying channels are overlapped. Due to the overlapped arrangement, the conveying channels in the flaky medium conveying mechanism occupy smaller space than conveying channels of the same length, so equipment volume and cost are reduced.

The invention discloses equipment for preparing hydrogen from methanol and water. The equipment comprises a liquid storage container, a raw material conveying device, hydrogen production equipment, a film separation device and a tail gas heat exchange device, wherein the liquid storage container is used for storing liquid methanol and water; the raw material conveying device is used for conveying the raw materials, namely, methanol and water, in the liquid storage container to the hydrogen production equipment so as to produce hydrogen; the produced hydrogen is conveyed to the film separation device to be separated; the tail gas heat exchange device comprises a second heat exchanger; the second heat exchanger takes the raw materials, namely, methanol and water, as cooling mediums to cool down a tail gas; an inlet of a heat exchange tube of the second heat exchanger is connected with the liquid storage container through a pipeline; an outlet of the heat exchange tube of the second heat exchanger is connected with the hydrogen production equipment; the temperature of the raw materials is raised through heat exchange of the heat exchange tube of the second heat exchanger, and meanwhile the temperature of the tail gas is reduced. Due to adoption of the equipment for preparing hydrogen from methanol water, a waste gas treatment device does not need to be arranged, so that the size of the equipment is reduced, and the mobility of the equipment is improved.

The invention discloses a swinging concrete mixing device for construction, which comprises a tank body, a moving seat, a bottom plate, a base and a motor; several springs are installed between the bottom plate and the base; the upper end of the moving seat is provided with a downwardly concave arc Shaped groove, a moving wheel is installed at the bottom of the tank body, the moving wheel is in contact with the arc groove, and the limit wheel is fixedly installed on the upper end of the bracket; a push plate is fixed on the end of the piston rod of the cylinder; The stirring blade and the planetary gear mechanism include an outer ring, a planetary gear carrier, a sun gear, a planetary gear and internal teeth, and a vertical scraper is fixed on the end of the connecting rod. The tank body swings left and right under the push of the cylinder, changing the flow direction of the internal raw materials, so that the raw materials can be mixed in the longitudinal direction, and the mixing effect of the raw materials is improved. The swing is safe and stable, no manual operation is required, and the degree of automation is high; between the base and the bottom plate The provided spring acts as a shock absorber to prevent vibration from generating noise.

The invention discloses a cascaded single-phase AC-to-DC isolation converter. The cascaded single-phase AC-to-DC isolation converter is formed by connecting the input sides of a plurality of AC-to-DCisolation converter modules in series and connecting the output sides of the AC-to-DC isolation converter modules in parallel. The input-side full-bridge structures of the modules provide a basis forsingle-stage AC/DC conversion. Through input-side and output-side full-bridge modulation strategies and a reasonable control method, the functions of DC stable output and power factor adjustment are realized. The converter and the control method overcome the defect that the output capacitance of the first-stage direct-current end of a two-stage AD/DC converter is large, and the size and the weightof the cascaded single-phase AC-to-DC isolation converter are reduced.

The invention provides a system and method for carrying out target identification and target tracking through utilization of a handheld holder. The system comprises a photographing device which is used for photographing an image comprising a to-be-tracked target and a to-be-identified object; a control system which is used for comparing face features of the to-be-tracked target and the to-be-identified object and sending out a tracking instruction to control the handheld holder to track the target; and the handheld holder which is used for moving the photographing device in different directions according to the tracking instruction, thereby keeping the to-be-tracked target at the middle position of the image. The target identification is carried out on a plurality of areas through utilization of a camera and the handheld holder has target identification and target tracking functions. The size of the device is small, so the device can be conveniently carried to any area and the target identification and target tracking in various areas can be realized flexibly.

The microwave and spray drier adopts microwave drying and spray drying technology. It is superior to available spray drying machine, and the steam during drying material may be also used as the heat source for other apparatus. Material liquid is atomized into miniature fog, after being selected, the fog is dried in the microwave heating and drying chamber to form powder, and the powder is intercepted with the filter to obtain dried powder product. The microwave and spray drier consists of spraying nozzle, atomizing separation chamber, separator, heating and drying chamber, separator, filter, steam and carrier gas outlet, carrier gas inlet and reflux pipeline. The present invention is used in food production, pharmaceutical, chemical and other industry to prepare powder with various kinds of liquid, and may be used in industrial nanometer powder material production.

The invention relates to a three-in-one device of a refrigerated compressed air dryer, which comprises a precooler, an evaporator and a gas-liquid separator, wherein the precooler, the evaporator and the gas-liquid separator are in an integrated structure; a warm moist air inlet and a diffusion cavity are arranged above the precooler; the precooler and the evaporator adopt an integral heat exchanger; the upper part of the heat exchanger is a precooling part while the lower part thereof is an evaporating part; the heat exchanger is provided with a horizontal channel and a vertical channel, the vertical channel is a warm moist air channel, the horizontal channel of the precooling part is a low temperature dry air channel, and the horizontal channel of the evaporating part is a coolant channel; and the gas-liquid separator is arranged at the bottom of the evaporator and comprises a filter screen and a guide baffle cavity, a lateral pipeline is connected with the horizontal channel inlet of the precooling part, and a dry air outlet is arranged at the horizontal channel outlet of the precooling part. The invention has the advantages of reasonable structure, compact space, low production cost, saved installation and maintenance charge, and high drying efficiency.

The invention discloses an integrated beam-splitting scanning unit. The integrated beam-splitting scanning unit comprises a first transparent substrate, a second transparent substrate, a liquid crystal layer and a beam splitting unit, wherein the liquid crystal layer is arranged between the first transparent substrate and the second transparent substrate and is used for deflecting an incident light beam to achieve scanning, and the beam splitting unit is arranged on the first transparent substrate and/or the second transparent substrate and is used for splitting the incident light beam. By reasonably arranging the beam splitting unit and a scanning unit, the equipment volume is reduced, and high integration is achieved.

The invention discloses a direct-drive type ball grinding mill system for a low-speed large-torque permanent magnet motor and relates to the technical field of ball grinding mill equipment. The direct-drive type ball grinding mill system comprises a cylinder body, a first supporting rotating shaft, a second supporting rotating shaft, a first bearing block, a second bearing block and the permanent magnet motor, wherein the first supporting rotating shaft and the second supporting rotating shaft are arranged at the two ends of the cylinder body, the first bearing block and the second bearing block are installed with the first supporting rotating shaft and the second supporting rotating shaft respectively, and the permanent motor is directly connected with the cylinder body and/or the supporting rotating shafts. The direct-drive type ball grinding mill system is characterized in that a self-adaptation flexible positioning device is arranged at the bottom of the permanent magnet motor and comprises a supporting base, buffering springs and a damping device, wherein the buffering springs and the damping device are arranged between the supporting base and the permanent magnet motor; and the buffering springs are symmetrically arranged on the two sides of the damping deice. The direct-drive type ball grinding mill system has the beneficial effects that the upper end of the damping device abuts against the bottom of a shell of the motor and is not connected with the shell of the motor, the buffering springs are connected with the supporting base and the shell of the motor respectively, the motor can be adaptive to the coaxiality error of a ball grinding mill through the self-adaption flexible positioning device, vibration in various directions is buffered, and the motor is protected.

The invention relates to a device for recycling and treating wastewater produced in the dismantling process of scraped vehicles. The device comprises a charge aggregation reactor; pole plate groups are arranged in the charge aggregation reactor; each pole plate group comprises a plurality of pole plates which are erected in parallel, and two pole plates which are positioned on the outmost side are connected with positive and negative electrodes of an external power; and horizontally arranged and insulated perforated plates are arranged between the pole plates. The invention also relates to a method for recycling and treating the wastewater produced in the dismantling process of scraped vehicles, and whether the wastewater flows through an oil and water separation reactor is determined according to the oil content of wastewater. The device for recycling and treating wastewater produced in the dismantling process of scraped vehicles has the advantages of effectively reducing power consumption, along with simple structure, good iron removal effect, and good aggregation effect of suspension substance, and is particularly suitable for wastewater treatment in a factory for dismantling the scraped vehicles.

The invention discloses a transmission method and a device of time division multiplexing data services, which are applied to an Ethernet. The method comprises the following steps: protocol converters of a home terminal and an opposite terminal respectively divide the network into at least two virtual local area networks according to an Ethernet protocol, and are interconnected by the at least two virtual local area networks; and the protocol converters of the home terminal and the opposite terminal receive or send time division multiplexing data by the at least two virtual local area networks. The device comprises an Ethernet switching module and a programmable logic module. The technical proposal realizes nondestructive protection when TDM data service data is transmitted based on the Ethernet and enhances the reliability of the network.

The invention discloses a full-automatic capsule detection machine, which consists of a host machine and a transmission control device, wherein the host machine is provided with a cap detection device, a body detection device, a non-separation removing device, a waste cap removing device, a waste body removing device, a body-cap nesting pre-locking device and a finished product leading-out device; a main motor drives a main shaft through a speed reducer; the main shaft is provided with a cam and a chain wheel; the cam drives each operating mechanism to run; and vacuum is adopted to finish the separation operation of the body and the cap. Positive pressure air is adopted to finish waste removing operations. The entire machine is operated to finish respective motions through a position sensor arranged on the capsule detection machine and PLC control. Because an optical fiber sensor body-cap detection device is arranged in the full-automatic capsule detection machine, the full-automatic capsule detection machine can accurately detect out defects of the body and the cap and lead the defects out of a production line. The whole process is finished by a program controller full-automatically, and the full-automatic capsule detection machine has the characteristics of small equipment volume, high efficiency and convenient operation.

An air energy drying box comprises a casing and a base. One side or an upper end face of the casing is provided with a visible door. The base is provided with a pollution and moisture discharge port. The inner of the casing opposite to the visible door is provided with a rolling wheel, the lower end of which is provided with a pollution filtering cavity that is communicated with the pollution and moisture discharge port. A heating system is arranged in the body of the drying box and mainly consists of a compressor, an evaporator, a heat exchanger, a hot air supply blower, a temperature and moisture control electric air valve and a controller. The casing is also provided with an air conditioning air blowing mouth and an air conditioning return air outlet thereon. The equipment of the invention is small in volume, simple in structure and energy-saving with the energy saving rate for drying a single article being over 70 percent. While heating and drying, the working staff can also release cold energy and enjoy an air conditioning for free in the situation that the drying ambient temperature is higher. Full automatic control is realized and the equipment can be adjusted randomly within the range from 45 to 85 DEG C and is widely applicable to the drying articles needed in the industries of hotels, dressmaking, foods, medicines, and the like.

The invention discloses a household garbage crushing, screening and drying integrated machine. The household garbage crushing, screening and drying integrated machine comprises a tooled roll extrusioncrusher (1), a roller type separating screen (2) and a sealing outer sleeve (3). The household garbage crushing, screening and drying integrated machine is characterized in that the roller type separating screen (2) is provided with a feeding port (2-1); a porous type circular body (2-4) is arranged on the outer wall of the roller type separating screen (2), the roller type separating screen (2)is internally provided with a material guiding plate (2-5), a sealing connector (2-3) is arranged at one end of the outer wall of the roller type separating screen (2), and the roller type separatingscreen (2) is connected with the feeding port (2-1) through the sealing connector (2-3); and the outer portion of the roller type separating screen (2) is provided with the sealing outer sleeve (3), and the outer portion of the sealing outer sleeve (3) is provided with a sliding track (3-1). The household garbage crushing, screening and drying integrated machine is small in equipment size, occupied area and infrastructure investment; the equipment energy consumption is low, and the work efficiency is high; and the fault rate is small, noncombustibles do not adhere to sieves, sieve hole blockage is avoided, and cleaning is avoided.

The present invention relates to a device and method for pediatric fingerprint testing and finger vein collection and identification. The acquisition and identification equipment also includes CCD camera equipment, image display equipment and computer processing terminals for observing, diagnosing, segmenting, clustering, calculating and identifying collected fingerprints and finger vein images. Its advantages are as follows: the equipment is small in size and has a portable function; the image is clear, can be enlarged and processed, and the color is intelligently compared, which is conducive to the observation and analysis of the doctor, and is beneficial to the diagnosis of the doctor; the collected data can be transmitted to the computer processing terminal, and the image is segmented by the computer , clustering, calculation and recognition, avoiding misjudgment and misidentification of traditional diagnostic techniques to the greatest extent.

The invention discloses a device and a method for determining anti-flooding and anti-scouring performances of aquatic plants. The device comprises a tank body and an aquatic organism planting system, wherein the aquatic organism planting system floats in water in the tank body; the aquatic organism planting system is provided with a water inlet and a water outlet, a current meter is arranged at the water outlet, a flow rate control system and a timing device are arranged at the water inlet, and the water inlet and the water outlet are respectively communicated with the water in the tank body; and the current meter, the flow rate control system and the timing device are respectively connected with a computer data processing system. The flow rate control system is used for controlling the water flow to perform a washing and flow capacity experiment on the aquatic plants planted in a tank of the device, the flow rate blocked by the aquatic plants is measured at the water outlet, and plant lodging data are recorded in the experiment; and the method and the device are convenient to operate, the volume of the device is small, and the water flows smoothly in the device, so that the method and the device can be quickly and accurately used for aquatic plants-related scientific experiments.

The invention discloses a color 3D (Three Dimensional) printer based on a digitization micro jet process and a shaping method based on the color 3D printer. The color 3D printer comprises an operation platform, wherein an operation opening is arranged on the operation platform; a first moving mechanism which moves along the Y axis direction is arranged on the operation platform on the two sides of the operation opening; a second moving mechanism which moves along the X axis direction is arranged on the first moving mechanism; a nozzle group is arranged on the second moving mechanism; a UV (Ultraviolet) curing light is arranged on one side of the nozzle group; the nozzle group consists of a nozzle C, a nozzle M, a nozzle Y, a nozzle K and a supporting nozzle which are uniformly arrayed and are connected with one another; the nozzle group is connected with an ink supply group; a forming worktable is arranged under the operation platform; the forming worktable is connected with a third moving mechanism which moves along the Z axis direction and is arranged to be parallel to the first moving mechanism. The color 3D printer disclosed by the invention is small in size, relatively low in cost, low in operation cost and high in forming speed; the range of available materials is wide; and no pollution is generated during a forming process.

The invention belongs to the technical field of image processing and judgment, and particularly relates to a separated detection system and method for detecting the size of a deformed steel wire head.The system comprises an image collection module, a transmission module, and an image processing module. The image acquisition module comprises a plurality of groups of industrial cameras and a plurality of groups of light sources; a plurality of wireless transmitters are respectively arranged on the cameras and are used for transmitting images acquired by the cameras to wireless receivers; anti-collision modules are arranged in the wireless receivers, and the anti-collision modules sort the groups of images and input the groups of images into an image processing module according to the sequence for reading; and the image processing module obtains the size information of the deformed steel wire head and judges whether the deformed steel wire head is qualified or not. The computer vision technology and the wireless transmission technology are combined, and the system is small in size and simple to arrange, and can be flexibly applied to production places such as a construction site factory. One set of equipment supports simultaneous work of a plurality of image acquisition equipment. Compared with a traditional detection method, the method greatly improves the detection efficiency and precision.

The invention provides a biological experiment test tube batch sterilization device. The device comprises an upper box body and a lower box body, a rotary washing device, an ultrasonic treatment device, a high-pressure steam treatment device and a supporting table adjusting device are arranged in the box body, the high-pressure steam treatment device and the supporting table adjusting device are used for adjusting the position of the test tube in an up-and-down and rotating manner, and the rotary washing device rotates at the upper part of the test tube and is used for cleaning the test tube together with the ultrasonic treatment device on the same axis. By means of the rotary washing device arranged in the device, the test tube opening can be effectively cleaned, meanwhile, the action effect of the ultrasonic treatment device is enhanced by washing water stirred in the test tube, the supporting table adjusting device is used for moving the test tube, so that a plurality of sets of cleaning equipment are cooperatively used, and the effect is improved. The device has the advantages that the size is small, the cleaning effect is better, the test tube capable of effectively cleaning the complex biological solute, and meanwhile, the technical problems that the test tube is poor in cleaning and disinfecting effects and the like are avoided.

The invention discloses a device for testing organic gas transmissivity. The device comprises a quantitative sampling device, a permeation pond, a detection device and a connection pipeline between the quantitative sampling device and the detection device, wherein the quantitative sampling device comprises a valve I, a valve IV, a multi-station communicating valve, a quantification device and connection pipelines connected among the components; the permeation pond is divided into an upper permeation pond cavity and a lower permeation pond cavity by a sample; the lower permeation pond cavity comprises a structural block, a valve and a through hole and is used for connecting the permeation pond and the detection device through the quantitative sampling device; the structural block is provided with a permeation gas hole, a sampling hole, a vacuum pump gas hole and a carrier gas input hole; and the permeation pond is connected with the detection device through the quantitative sampling device. The device has a simple structure and is convenient to operate; and the problems of inaccurate sampling amount, sampling difficulty, low sample injection precision and the like which are caused by sample gas pressure during test of gas permeability of a thin film are solved.

The invention discloses hydraulic power generation equipment. The hydraulic power generation equipment comprises a body portion and a power generation portion. The body portion comprises a wedged filter screen, a water inlet, a water outlet, an immersive floating platform, a guide column and a steering bearing. The wedged filter screen is positioned at the front end of the immersive floating platform, and the guide column is arranged at the wedged junction of the wedged filter screen. A power generator is fixedly positioned in the middle of a pipeline of the immersive floating platform by a supporting frame, propeller blades are fixed to the front end of the power generator, and a wire is respectively connected with an external circuit and the power generator. Compared with the prior art, the hydraulic power generation equipment has the advantages that the equipment is small in size; by mounting of the metal filter screen on the basis of a traditional hydraulic power generator, the problem of power generation efficiency reduction caused by blockage of the propeller blades due to impurities in a power generation process is solved; the problem of high resistance of the immersive floating platform in stream flow is solved owing to the wedged filter screen; due to design of the cylindrical guide column, the platform can be mounted fixedly and conveniently.

The invention discloses a coal grinding device for an efficient hot water boiler. The coal grinding device comprises a primary coal crushing box, a fine coal grinding box, a coal conveying pipe, a coal inlet pipe and a coal outlet hopper; the bottom end of the primary coal crushing box is arranged at the top end of the fine coal grinding box through the coal conveying pipe; the coal inlet pipe is arranged at the top end of the primary coal crushing box; the coal outlet hopper is arranged at the bottom end of the fine coal grinding box; left and right two rotary beating devices are arranged in the primary coal crushing box; the rotary beating devices consist of rotating motors, rotating shafts and multiple beating rollers; the rotating motors are arranged on the top surface of the primary coal crushing box, and are connected with the rotating shafts in the primary coal crushing box; the multiple beating rollers are arranged on the left and right two sides of the rotating shafts; upper and lower two rows of drum coal pulverizing devices are arranged in the fine coal grinding box; and each row of drum coal pulverizing devices consists of left and right two circular grinding wheels. The coal grinding device for the efficient hot water boiler, provided by the invention, is higher in coal grinding efficiency, smaller in equipment size, lower in power consumption and better in coal grinding fineness.