78results about How to "Improve the teaching environment" patented technology

The invention discloses a novel lift type blackboard capable of changing front and back positions and quickly wiping off dust, which consists of two blackboards, flexible racks, fixed supporting frames, one-way gear mechanisms, a front and back position changing device and a board wiper device, wherein the front sides of the left and the right of the blackboards are provided with the flexible racks, the two side faces of the left and the right of the blackboards are provided with common racks, the fixed supporting frames are provided with the one-way gear mechanisms, and gears and tensioning wheels are arranged between the supporting frames in a crossing manner. The novel blackboard is mainly used for being cooperated with the teaching activities of a teacher, front and back position changing and lift movement of the blackboards are realized, the function of quickly and automatically wiping off dust during lifting is realized, the time of wiping the whole blackboard is saved, the teaching efficiency of the teacher is improved, and chalk dust generated in the wiping process is distributed between the two blackboards without flying in a classroom, so that chronic damage of the chalk dust to the teacher and students is reduced, the teaching environment is improved, and the teaching quality is enhanced.

The invention discloses a dust removal blackboard and comprises a support frame and a rolled writing surface arranged on the support frame. A support device used for supporting the rolled writing surface is arranged on the support frame; a rotating device of the rolled writing surface is fixed on the support frame and arranged at the inner side of the rolled writing surface; a wiping dust removal device is fixed on the support frame and arranged at two sides of the outer part of the rolled writing surface. Therefore, when in use, especially in the primary and middle schools, the invention has the advantages of reducing the labor intensity of teachers or students, no pollution to environment and decreasing the incidence of pneumoconiosis, thus improving the environment of the class and the quality of teaching.

The invention discloses an air purification system for a dissecting room. The air purification system comprises a laboratory, a plurality of dissection platforms, an air conditioner system, an air supply system and an exhaust system, wherein the air supply system comprises an air feeder which is connected to an air outlet end of the air conditioner system, and a circulation return air device which is connected to an air outlet end of the air feeder by a fresh air pipeline; the air supply system supplies air to the laboratory by an air outlet port of the circulation return air device; each dissection platform comprises a dissection box body with an inner cavity, a work cavity which is formed in the dissection box body and a negative pressure air draft channel which is formed in the bottom of the dissection box body; a ventilation cavity is formed between the outer side wall of each work cavity and the inner side wall of the corresponding dissection box body; each dissection platform also comprises an exhaust opening which is formed in the side wall of the work cavity and is communicated with the ventilation cavity; and the exhaust system comprises an exhaust pipe which is connected to an outlet of the negative pressure air draft channel, and an exhaust device which is connected to an exhaust outlet of the exhaust pipe. The dissecting room provided with the air purification system has the advantages that indoor formaldehyde concentration is low; the experimental environment is good; and the environmental requirement can be met.

The invention relates to a multifunctional blackboard, which comprises an inner chip, rotating shafts, blackboard cloth and brush patch members. The outer surface of an inner core board is wrapped by a thin iron sheet; tension springs are respectively arranged at two ends of the inner core board and are used for supporting two ends of the rotating shafts; the rotating shafts are fixed by two ends of a support frame arranged on the inner core board; the lower ends of the rotating shafts are connected with a one-way alternating current speed reducing motor; the blackboard cloth is wound on the rotating shafts; and the brush patch members are arranged on the back side of the blackboard cloth and are also arranged in a powder storage box. The invention has the beneficial effects that the condition that chalk dust flies towards teachers and students in a classroom can be thoroughly changed; a good studying and teaching environment is created; the multifunctional blackboard has a function of promoting the health of the teachers; and meanwhile, the chalk dust can be recycled so as to meet the requirement of recycling economy in China.

The invention discloses a teaching chalk dust collecting system, wherein a cavity is formed inside a blackboard eraser, and a plurality of dust absorption holes are formed at the periphery of the blackboard eraser and communicated with the cavity; all blackboard erasers are connected with corresponding chalk dust collection pipes, respectively, the chalk dust collection pipes are communicated with the cavity, an air draft device is arranged in each chalk dust collection pipe, the other ends of all the chalk dust collection pipes are communicated with a chalk dust collection chamber, and water for dissolving the chalk dust is held at the bottom of the chalk dust collection chamber. The chalk dust collection chamber suppresses harm on the environment due to the chalk dust flying everywhere, reduces the harm of the chalk dust to the health of teachers and students, and is advantageous for creating an excellent teaching environment. Most part of chalk dust can be absorbed in the chalk dust collection chamber by virtue of the chalk dust collection pipes and the air draft devices, and therefore, secondary recovery and reutilization of the chalk dust can be realized, and waste is turned into wealth.

The invention discloses intelligent listening training equipment convenient to carry, and belongs to the technical field of English learning devices. The intelligent listening training equipment convenient to carry comprises an equipment main body; a display screen and a writing column are arranged on the left side and the right side of the front side wall of the equipment main body respectively;a clamping ring is arranged on the right side wall of the equipment main body; a writing pen is clamped in the clamping ring; the left side wall of the equipment main body is provided with a pluralityof USB interfaces; loudspeakers are arranged at the left end and the right end of the upper side of the equipment main body; and a Bluetooth connector is arranged between the display screen and the writing column on the front side wall of the equipment main body. Reasonable listening training can be achieved, the reliability of a listening training machine is improved, the listening equipment canbe automatically switched on or off according to surrounding noise, intelligent automatic control of listening training is realized, the listening training effect is ensured, an intelligent English listening and speaking training system is adopted to improve an English listening and speaking training teaching environment, the learning initiative of users is enhanced, and the intelligent listeningtraining equipment has the characteristics of high training efficiency and good effect.

The invention relates to a multifunctional drawing ruler. The multifunctional drawing ruler comprises a main ruler which consists of a main ruler sliding groove and a horizontal groove, wherein a first vice ruler, a second vice telescopic ruler and a second vice ruler are respectively provided with a first vice ruler sliding groove, a telescopic ruler sliding groove and a second vice ruler sliding groove; the main ruler sliding groove is connected with one end of a main telescopic ruler by virtue of a pin; the end part, close to one side of the horizontal groove, of the main ruler is connected with one end of the first vice ruler; the first vice ruler sliding groove in the first vice ruler is connected with one end of the first vice telescopic ruler by virtue of a first spherical head plunger; the other end of the first vice telescopic ruler is articulated with the telescopic sliding groove in the second vice telescopic ruler by virtue of a second spherical head plunger; the other end of the second vice telescopic ruler is connected with the second vice ruler sliding groove in the second vice ruler by virtue of a third spherical head plunger; the other end of the second vice ruler is movably connected with the other end of the main telescopic ruler. The multifunctional drawing ruler is capable of achieving functions of a ruler, a compass, an angle gauge, a set square and the like, is convenient to use and convenient to carry and can be widely applied in multiple fields.

The invention provides a large multifunctional electronic teaching display screen of both environmental protection and panoramic vision. The large multifunctional electric teaching display screen is made from the combination of a large display screen and a computer host in the existing market. First, a handwriting input function, a touch function, an up-and-down scrolling function, an adding and deleting function, a zooming function, a curtain drawing function and a storage function, and the configuration of the PC mainframe and all functions thereof are based on the prevailing configuration and functions in the market; second, the computer host is connected with the display screen with a data connection bus, thus forming the multifunctional electronic teaching display screen. With the large multifunctional electronic teaching display screen, a teacher can firstly store the content of a course in a memory card, a U disc or a CD with a computer when preparing for the course, then directly transmit data onto the display screen through the computer host when in teaching, or also can directly transmit or write information on the display screen for correction and adjustment through a computer keyboard, a mouse and a menu function on the display screen, thus realizing digitized teaching.

The invention, which belongs to the teaching apparatus field, relates to a testing stand for a thermal balancing test of a boiler. An objective of the invention is to design a testing stand for a thermal balancing test of a boiler, wherein the testing stand is used for collecting intelligently various load data generated under various circumstances of the boiler of a power plant. a concrete structure of the testing stand provided in the invention is arranged as follows: installing a gas fired-boiler on the testing stand, installing an air inlet pipe, an outlet pipe and an inlet pipe at a lower end of the gas fired-boiler, and installing a smoke exhaust pipe at an upper end of the gas fired-boiler; installing a water inlet thermometer, a gas flowmeter, a gas pressure meter, a water outlet thermometer, a water flowmeter, and a micro-differential pressure gauge of flue gas. arranging a measuring point of differential pressure and a measuring point of composition and temperature of flue gas on the smoke exhaust pipe; installing an air-inlet vortex flowmeter and a pressure transmitter on the air inlet pipe; installing a water-outlet temperature sensor on the outlet pipe; installing a water-inlet temperature sensor and a water-inlet turbine flowmeter on the inlet pipe; installing a sudden-stop switch on the testing stand; and arranging a working box at the lower end of the testing stand. The testing stand is invented for satisfying demands for culturing practice abilities of students and cultivating engineering applied talents; and therefore, a testing stand for a thermal balancing test of a boiler is developed and is used for making a comprehensive test of a thermal energy and power engineering major.

The invention, which belongs to the teaching apparatus field, relates to a testing stand for a thermal balancing test of a boiler. An objective of the invention is to design a testing stand for a thermal balancing test of a boiler, wherein the testing stand is used for collecting intelligently various load data generated under various circumstances of the boiler of a power plant. a concrete structure of the testing stand provided in the invention is arranged as follows: installing a gas fired-boiler on the testing stand, installing an air inlet pipe, an outlet pipe and an inlet pipe at a lower end of the gas fired-boiler, and installing a smoke exhaust pipe at an upper end of the gas fired-boiler; installing a water inlet thermometer, a gas flowmeter, a gas pressure meter, a water outlet thermometer, a water flowmeter, and a micro-differential pressure gauge of flue gas. arranging a measuring point of differential pressure and a measuring point of composition and temperature of flue gas on the smoke exhaust pipe; installing an air-inlet vortex flowmeter and a pressure transmitter on the air inlet pipe; installing a water-outlet temperature sensor on the outlet pipe; installing a water-inlet temperature sensor and a water-inlet turbine flowmeter on the inlet pipe; installing a sudden-stop switch on the testing stand; and arranging a working box at the lower end of the testing stand. The testing stand is invented for satisfying demands for culturing practice abilities of students and cultivating engineering applied talents; and therefore, a testing stand for a thermal balancing test of a boiler is developed and is used for making a comprehensive test of a thermal energy and power engineering major.

The invention discloses a blackboard comprising a framework and two blackboard sets. The framework comprises a first frame, a second frame, a third frame and a fourth frame which are sequentially arranged; the first frame and the third frame are oppositely arranged and both vertically arranged; the second frame and the fourth frame are oppositely arranged, the second frame is arranged above the fourth frame, and the second frame and the fourth frame are horizontally arranged; the two blackboard sets are distributed in the length direction of the second frame and each comprise a blackboard body, a supporting rod and a driving mechanism; the supporting rods are parallel to the first frame; the first end of each supporting rod is rotationally connected with the second frame; the second end of each supporting rod is rotationally connected with the fourth frame; the blackboard bodies are installed on the supporting rods; and the driving mechanisms are used for driving the blackboard bodies to rotate with the supporting rods as centers. According to the blackboard, the positions of the blackboard bodies can be effectively adjusted, and light reflecting interference is avoided.

The invention relates to a blackboard convenient for ash suction, belonging to the technical field of blackboard design. The vacuum pipe sections arranged at intervals; the lower end of each vacuum pipe section is connected with the vacuum branch pipe, and its upper end is closely attached to the writing board surface of the blackboard; the vacuum branch pipe is connected with a main pipe, and the outlet end of the main pipe is installed with a suction pump The outlet end of the suction pump is connected to a buffer tank through a pipeline and the pipeline is connected to the bottom of the buffer tank, an exhaust pipe is arranged on the top of the buffer tank, and a valve is installed on the pipeline between the suction pump and the buffer tank. The blackboard with convenient dust absorption of the present invention has a simple structure, the dust of the chalk can be quickly removed when writing and wiping the blackboard, a good teaching environment is provided for teaching, and the students' learning environment is effectively improved. learning environment.