63results about How to "Suitable for purchase" patented technology

A self-aeration bumper pad comprises a bumper pad body having a fluid cavity, and a fluid pathway arranged on the bumper pad body, the fluid pathway guides a fluid to enter the fluid cavity, and the inside of the bumper pad is filled with a sponge-like high-elasticity filler, so the fluid is filled to the fluid cavity from the fluid pathway according to the self elasticity of the filler, and the flow of the fluid makes the bumper pad body uniformly support the weight of body parts of a user, thereby the flow and the nutrient conveying of blood in skins of the human body support parts are reached, and skin disease prevention and injured skin curing effects are achieved.

The invention discloses pet dog feed, which comprises the following components in parts by weight: 400-600 parts of wheat gluten, 400-600 parts of bone powder, 400-600 parts of fish powder, 200-300 parts of corn powder, 100-200 parts of potato powder, 1-5 parts of tryptophane, 1-5 parts of phenylalanine, 1-5 parts of valine, 1-5 parts of arginine, 1-5 parts of lysine, 1-5 parts of glutamic acid, 1-5 parts of threonine and 1-5 parts of sodium chloride. The pet feed is suitable for feeding pet dogs; under proper situations, the pet feed can also be used for feeding pet cats, guinea pigs and other pets. In the formula, the wheat gluten plays a role in increasing the flexibility and the plasticity of the feed, the fish powder, the bone powder and the potato powder have abundant nutrition and contain abundant amino acids, vitamins and other essential nutrition, and the sodium chloride can supplement the content of sodium ions in pet bodies. The feed is high in nutritional value and does not contain any additives; furthermore, the preparation is simple, the cost is low and the pet dog feed is suitable for purchase and use by ordinary families.

The invention relates to the technical field of tools for medical teaching, in particular to a CT simulation system for teaching. The CT simulation system for teaching is suitable for teaching demonstration, free of radiation and harm, easy to operate and good in simulation effect and can simulate operation and output and display human body scanning information. The system comprises a simulation platform assembly, a simulation scanning frame assembly arranged outside the simulation platform assembly in a sleeving mode, a human body model arranged above the simulation platform assembly, a data storage and processing assembly used for receiving, processing and sending data, a control assembly and a display assembly, wherein the control assembly and the display assembly are connected with the data storage and processing assembly through cables. The CT simulation system for teaching has the advantages of being simple and reasonable in structure, low in manufacturing cost, suitable for purchase and use of schools, suitable for teaching demonstration, free of radiation and harm, easy to operate, good in simulation effect and capable of simulating operation and outputting and displaying the human body scanning information.

The invention relates to Chinese herbal medicinal shampoo and a preparation method for the same, and belongs to the technical field of preparation of chemical products for daily use. The preparation method specifically comprises the following steps of preparing Chinese herbal medicinal extract by impregnating 20 to 40 parts by weight of fleece flower root, 10 to 20 parts by weight of angelica sinensis, 20 to 40 parts by weight of aloe, 10 to 20 parts by weight of ginger, 20 to 40 parts by weight of cape jasmine fruit and 20 to parts by weight of salvia in alcohol water, performing constant-temperature alcohol water refluxing extraction and adsorptive separation, and extracting supernatant; adding the Chinese herbal medicinal extract into other raw materials to prepare a finished product according to a national standard shampoo production process. The product prepared by the method has the effects of shampooing, moisturizing, conditioning, nourishing, dandruff removal, itching relieving, hair care, hair loss prevention and the like, and is safe and free of toxic and side effect.

An electric stair-climbing wheelchair is available in nursing type and self-driving type. A track travelling mechanism and a track driving mechanism are disposed on a frame between front wheels and rear wheels. The front wheels are disposed on a seat. The rear wheels are disposed on a rear wheel lifting mechanism. The seat is hinged to the frame. A seat balance mechanism is hinged to a seat support. The rear wheel lifting mechanism is hinged to the frame. A battery module is connected with a track travelling motor, a seat balance motor and a rear wheel lifting motor through a control mechanism. Power output ends of the three motors are connected with the track travelling mechanism, the seat balance mechanism and the rear wheel lifting mechanism through respective transmission mechanisms. The electric stair-climbing wheelchair has the advantages that the self-driving type is added while the nursing type is modified; climbing stairs with rubber tracks is safer; track-aided stair climbing is subjected to stepless speed regulation, and the fear of climbing stairs is eliminated for the disabled; an electric carrier tricycle is specially designed according to the two types, the running speed and distance of the electric carrier tricycle are far beyond those of domestic and overseas like products, and the electric carrier tricycle is low in price and easy to popularize.

The invention discloses a portable electromagnetic compatibility (EMC) test-level pulse timer for an electric energy meter. A photoelectric probe sampling port and a pulse input sampling port are formed in a metal shell; a photoelectric probe and a light guide column of the photoelectric probe are arranged behind the photoelectric probe sampling port; the pulse input sampling port is connected with a pulse output section of an electric energy meter to be measured through a shielding wire; the photoelectric probe, and the output end and the pulse input sampling port of the light guiding column of the photoelectric probe are divided into two paths, one path is connected in parallel with a counter, and the other path is connected with the outside of the metal shell through the shielding wire from a pulse signal output end and is connected with an electric energy meter inspection device; the counter is connected with the timer and a time output module sequentially; the timer is connected with a comparator and an error output module sequentially at the same time; and the comparator is connected with a measurement module simultaneously. The pulse timer can be conveniently and intuitively operated while measuring accuracy is ensured, so that measuring efficiency is greatly improved; and the pulse timer has high electromagnetic interference resistance.

The invention provides an automatic rice screener and a rice screening method. The automatic rice screener comprises a side plate, a hopper, a blow mechanism and a screening mechanism, wherein the hopper, the blow mechanism and the screening mechanism are disposed on the side plate sequentially from top to bottom. The blow mechanism comprises a motor and fan blades, wherein the motor is disposed on the side plate and the fan blades are driven to rotate by the motor. The screening mechanism comprises a screen holder reciprocating below the hopper and a screen which is nested in the screen holder and which moves with the screen holder. One end of the screen holder is provided with a rectangular guide groove. A guide post driven by a drive device to do circular motion constantly is disposed inside the guide groove. When the guide post does circular motion, the guide post contacts with two long sides of the guide groove, perpendicular to a slide, by turns, and the screen holder is pushed to reciprocate along the slide; the fan blades disposed on the side of grains falling from the hopper to the screen blow air towards the grains. The grains are automatically screened twice by the mechanical device, so that impurities inside can be screened and clean grains are obtained; the whole process is efficient and saves energy.

The invention discloses a vacuum freeze drying calcium milk bean and a preparing method thereof, wherein the bean milk is good in taste, high in nutritional ingredient and high in calcium containing amount, and would be easily picked out and purchased by children and parents, thus has a good market prospect. The formula for the vacuum freeze drying calcium milk bean disclosed by the invention is preapred from the following components in parts by weight: 40-50 parts of yoghourt; 5-10 parts of fruit and vegetable powder or juice; 7-10 parts of milk powder; 5-8 parts of white granulated sugar; 8-10 parts of dextrin; 5-7 parts of starch; and 0.001-0.01 part of whey calcium.

The invention discloses a pet cat feed, which consists of the following components in parts by weight: 200-300 parts of wheat gluten, 200-300 parts of bone meal, 200-300 parts of fish meal, 200-300 parts of soybean meal, 200-300 parts of corn meal, 100-200 parts of peanut meal, 200-300 parts of bran, 80-100 parts of yeast powder, 1-5 parts of vitamin A, 1-5 parts of vitamin B1, 1-5 parts of vitamin C, 1-5 parts of vitamin E and 1-5 parts of table salt. The pet cat feed provided by the invention is suitable for feeding pet cats. By adopting the formula provided by the invention, the pet cat feed contains rich essential nutrients such as proteins, amino acid and vitamins, and especially the fish meal is widely popular with the pet cats. The vitamin A, the vitamin B1, the vitamin C, the vitamin E and the like can supplement pet vitamins. Sodium chloride can increase the content of sodium ions in bodies of pets.

A rotary non-dead-angle lighting soilless culture vegetable planting machine comprises a base, an electric control turntable and a culture frame; an electric control turntable is installed on the base, and a cultivation frame is installed on the electric control turntable, the cultivation frame comprises a plurality of layers of liquid planting trays, and two layers of liquid planting trays are fixedly connected through a plurality of connecting short columns; a planting cup fixing frame is placed in the liquid planting plate, a plurality of planting cup placing holes are formed in the planting cup fixing frame, and planting cups are placed in the planting cup placing holes; the planting cup is used for planting vegetables, flowers and other plants; fixing glass is arranged between most adjacent two connecting short columns of the same layer, and sliding glass serving as a sliding door is arranged between outer edges of an upper end face and a lower end face of the liquid planting plate. The planting machine is cylindrical and can be made into series products with different diameters, the number of layers of the cultivation rack can be adjusted, installation operation is simple, and functions are complete; an outer cover is omitted, a glass outer cover is directly arranged on the cultivation frame, raw materials are saved, cost is reduced, and the planting machine is more suitable for being purchased and used by the public.

The invention belongs to the field of medical care, specifically relates to a biologic negative electrical meridian points health protection treatment method and system. The system device comprises a biologic negative electricity generator, a negative electricity conveyer, a meridian potential combing apparatus, and a point potential kneading apparatus. The health protection treatment method comprises generating biologic negatron of 70KHz with the biologic negative electricity generator, transporting to patients by the negative electricity conveyer, kneading and carding important meridian points such as head, neck, chest, abdomen back, and non-fixed point with the meridian potential kneading apparatus to activate cells, supply cell membrane potential for aggrandizing organ gammadecay to health level, thus repairing gammadecayed cell and organ function, balancing physiology, and eliminating sub-health or disease.

The invention discloses a feed for artificially feeding crabs in a large scale. The feed is characterized by comprising the follow raw materials in parts by weight: 18-24 parts of yellow corn, 19-26 parts of yellow millet, 1-4 parts of edible salt, 16-20 parts of beef liver, 15-19 parts of snail meat, 3-5 parts of thick broad-bean sauce, 11-19 parts of cucumbers, 15-20 parts of pumpkins, 13-17 parts of chlorella, 2-5 parts of rice wine, 1-3 parts of five spice powder, 14-18 parts of rice husks, 0.4-0.8 part of poria cocos, 0.3-0.7 part of honeysuckle, 0.2-0.5 part of atractylodes macrocephala, 0.6-0.8 part of radix codonopsitis, 4-7 part of a phagostimulant, and a proper amount of water. According to the invention, through optimizing feed components, adding the Chinese herbal medicine in the feed and changing a conventional crab feed processing method, high crab yield under artificial breeding in a large area is achieved, natural characteristic that the crabs are large, healthy and strong, and fat, delicious and nature in taste, high in nutritional value and the like, can be achieved, and the feed provided by the invention goes green and environmental protection, is not added with any additives, simple in preparation, low in cost, and is suitable for common family purchase.

The present invention relates to decorating book slipcase and its making process. The decorating book slipcase includes one rectangular book frame with adhered decorative facing; one cover comprising one upper board, one lower board and one side board; and one outer decorative coating material to integrate the upper board, the lower board and the side board. Its making process includes the steps of spraying or gold stamping leather or cloth material; forming the boards of the cover and the rectangular book frame, adhering the printed leather or cloth material to the boards to form the cover, adhering decorative facing to the rectangular book frame and combining the cover and the rectangular book frame. The decorating book slipcase is applied in storing book or as ornament, and has simple structure and low cost.

The invention belongs to the field of electronic medical health, and in particular relates to a method and a system for health care and physical therapy by low-potential negative electric ions. The system device comprises a biological negative electric ion generator, a negative electric ion introducer, a channel-point carder and a physical therapy time manager; and the health care and physical therapy method comprises that: the biological negative electric ion generator generates low-voltage DC high-concentration negative electric ions with the same frequency of 70KHz as bioelectricity; the negative electric ions are introduced into a patient by the negative electric ion introducer without wound, and 60 trillion tissue cells of the whole body of the patient fully absorb the negative electric ions in minutes; and the channel-point carder is used to repeatedly perform carding massage on channels and points on parts such as head, neck, chest, abdomen, back and the like and A shi points related to the affection to increase cell membrane potential, activate cells, strengthen permeability of cell membranes, improve metabolism function, recover the functions of organs of the patient from the cellular level, reach physiological equilibrium, improve physiological function, eliminate the affection and make the patient recover / keep healthy.

The invention provides a method for obtaining a customized insole, the customized insole and a customized shoe, and solves the problems that the shoe is difficult to conform to the physiological curveof the sole of a human body and the comfort is poor. The method comprises the steps: enabling a user to select a proper shoe type to try on, and determining the length and thickness of an insole; performing 3D scanning on the feet of the user to obtain foot three-dimensional data; calibrating the foot feature position of the user according to the three-dimensional data, and respectively calibrating a heel clock center position point, a first metatarsophalangeal position point, a fifth metatarsophalangeal position point and an arch height point; controlling the length of the customized insoleto be behind the first metatarsophalangeal position point and the fifth metatarsophalangeal position point according to the gait rule of the human body during walking; determining the curvature of thecustomized insole in combination with the calibration points; and determining the thickness of the insole according to the length and curvature of the customized insole. According to the customized insole obtained through the method, the curvature is matched with the foot shape of the user, the insole is highly matched with the foot of the user, and the comfort degree is high; customization period is greatly shortened.

The invention discloses a pig feed formula. The pig feed formula is prepared from the following raw materials by weight: 20 to 40 percent of corn, 20 to 40 percent of wheat, 3 to 8 percent of rice bran meal, 15 to 20 percent of soybean meal, 2 to 5 percent of molasses, 8 to 15 percent of calcium hydrophosphate, 7 to 14 percent of stone meal, 0.2 to 0.5 percent of table salt, 0.05 to 0.15 percent of choline chloride, 1 to 3 percent of complex minerals, 1 to 2 percent of complex vitamins, 0.02 to 0.05 percent of wheat enzyme, 15 to 30 percent of sweet potato flour, 0.5 to 2 percent of fish meal, 0.5 to 1 percent of shrimp shell powder, 0.1 to 0.5 percent of fructus crataegi, 0.1 to 0.3 percent of poria cocos, 0.2 to 0.6 percent of wrinkled gianthyssop herb, 0.2 to 0.8 percent of folium isatidis and 0.4 percent of licorice roots. The feed has the advantages of high nutritional value, simple preparation, low cost and suitability for the public to buy.

The invention relates to a syringe-type breast pump which comprises a bell-mouthed breast shield (1), wherein the bell-mouthed breast shield (1) is arranged at one end of a push rod (3), the other end of the push rod (3) is provided with a piston (5), the push rod (3) is inserted in a syringe (4) and can move up and down in the syringe (4), one side of the lower part of the syringe (4) is provided with a through hole, the through hole is provided with a connecting pipe (7), and the syringe (4) is communicated with a nipple (8) through the connecting pipe (7). The invention has the advantages of simple structure and convenient operation; since the syringe is connected with the nipple through the connecting pipe, the breast milk can be fed to the infant immediately after being collected; and the breast milk does not need to be poured in other containers, and therefore, the invention is sanitary and practical. The invention also has the advantages of simple operation and low production cost, and is suitable for common people to purchase.

The invention provides a traditional Chinese medicine fumigation treatment machine, which includes a handle and a pillow; the universal wheel is provided with four places, with a brake function, and is fixed on the bottom side of the bottom plate through screw connection; the electromagnetic heating pot is equipped with a microprocessor, The heating tank is fixed on the bottom side of the bed board; the bed board is a rectangular bed board with a high middle and low sides, and a threaded hole is opened at the left and right ends of the front and rear sides; the water nozzle is a stud with a through hole processed in the middle The structure is fixed on the water hole through threaded connection; the electromagnetic heating pot groove is an L-shaped chute, and the rear side is fixed with a limit plate for placing the electromagnetic heating pot; the surface of the pillow is made of waterproof material and placed on the top of the bed The right end of the side; the present invention has a simple structure and does not take up space. All main parts can be disassembled and stored. It can be used as an ordinary lifting table and an examination table at the same time. The cost is low, and the manufacturing cost is equivalent to the cost of fumigation treatment in a hospital. It is very suitable for family purchase use.

The invention relates to a triangular chained clamping and cutting system for a small garlic harvester. The system comprises a clamping arm, cutting devices, a plant holder and a guider, the clampingarm consists of an isosceles-triangle transmission mechanism and a rectangular transmission mechanism, and a clamping passage is formed between the two mechanisms of the clamping arm. Two cutters arestaggered vertically while a small gap is reserved between the two cutters, and shafts of the cutters extend downwards by a certain distance to make it convenient to approach garlic bulbs to realize cutting. An included angle of 15-30 degrees is formed between the clamping passage and a transverse center line of the harvester, a feeding port of the clamping passage is positioned behind a limitingwheel of the harvester, and the front end of the guider is positioned on the inner side of the limiting wheel. The plant holder is parallel to the transverse center line of the harvester, the plant holder and the guider are positioned on two sides of the clamping passage and form a certain included angle, and picked garlic plants are guided into the clamping arm and delivered by the clamping arm to the tail end to realize garlic bulb cutting by the cutting devices.

The invention relates to a combination dining table. The combination dining table is composed of a periphery and an inner layer, wherein the periphery is in a circumference shape defined by 12 isosceles trapezoid plates, the inner layer is a rotatable round table top, and the isosceles trapezoid plates in the periphery are mounted on prismatic brackets, and every two adjacent isosceles trapezoidal plates are connected with one prismatic bracket, which is composed of square tubes and angle steel, and the cross-section of each prismatic bracket is in an isosceles trapezoid shape, and is matched with each isosceles trapezoid plate. The rotatable round table top of the inner layer is located in the space of the middle of a circumference table top formed by the periphery isosceles trapezoid plates and is higher than the periphery circumference table top, the back of the rotatable round table top is connected with a square frame, the square frame is connected with a long circular steel tube, and the long circular steel tube is connected with a large square bracket on the ground and fixed. The combination dining table overcomes the defects of heavy weight and difficult assembling of disc-type rotating dining tables. The combination dining table has the advantages of simple structure, convenient assembly and disassembly, low cost and small space occupancy.

The invention discloses a pig feed formula. The pig feed formula comprises the following raw materials in parts by weight: 40% of corn, 25% of soybean meal, 3% of soybean oil, 20% of wheat bran, 5% of Cyperus Rotundus L, 7% of whey powder, 8% of stone flour, 2% of calcium hydrogen phosphate, 2% of stone flour, 2% of fish meal, 0.3% of lysine, 10% of grape slag and 10% of fresh vegetable leaves. The feed has the advantages of high nutrition value, simple preparation, and low cost, and is suitable for mass purchase and usage.

The invention discloses a threshing mechanism and a reaping machine using same; the threshing mechanism comprises a slant airpipe; the upper part of the airpipe is connected with a grain-collecting chamber; an air channel of the airpipe is blanked off by an air return plate, thus forming a tail wind channel and a headwind channel; the inner entrance end of the tail wind channel is provided with a wind wheel and a grass-removing rod corresponding to the wind wheel; blade edge of the wind wheel is teeth-shaped; the wind wheel and the grass-removing rod operates correspondingly and matches with each other to carry out threshing; the exit end of the headwind channel is provided with air holes which are located at the slant upward side or the front of the grass-removing rod. The reaping machine of the invention has the following advantages: 1. rough threshing, no grains omitted in straws; 2. thorough separation, grain is completely separated from abortive grain and grass-blade; 3 the whole machine is small and lightweight and is easy to operate; two people are enough to move the machine with ease in field paths and one person is enough to accomplish reaping of the grain, as a result, the machine is applicable to mountain area and hills; 4. the machine has complete functions by integrate self-moving, threshing, separation, cutting and loading in one single one machine.

The invention discloses a Chinese herbal medicine pig feed formula with a high nutritive value. Raw materials the formula comprise the following components in parts by weight: 40 to 60 parts of corn,10 to 15 parts of bean pulp, 20 to 30 parts of wheat bran, 2 to 5 parts of molasses, 8 to 15 parts of calcium hydrophosphate, 5 to 15 parts of mountain flour, 0.2 to 0.5 part of salt, 0.05 to 0.15 part of choline chloride, 1 to 2 parts of compound vitamins, 15 to 30 parts of sweet potato flour, 1 to 2 parts of fish meal, 20 to 40 parts of pine needle meal, 10 to 20 parts of Angelica sinensis, 10 to 15 parts of rhizoma cyperi, 5 to 10 parts of Agastache rugosus, 10 to 20 parts of platycladi seeds, 10 to 20 parts of Mangnolia officinalis, 5 to 10 parts of elecampane, 5 to 10 parts of herba siegesbeckiae, 5 to 10 parts of masson pine, 5 to 10 parts of folium artemisiae argyi, 10 to 20 parts of prepared rehmannia root and 15 to 30 parts of dried orange peel. The Chinese herbal medicine pig feed formula has the advantages that the growth performance of pigs is effectively improved, the digestibility of feeding nutrients is improved, the quality of meat is improved, the nutritive value is high, and the cost is low.

The invention discloses a pig feed formula. The pig feed formula is prepared from the following raw materials by weight: 20 to 40 percent of corn, 20 to 40 percent of wheat, 3 to 8 percent of rice meal, 15 to 20 percent of soybean meal, 2 to 5 percent of molasses, 8 to 15 percent of calcium hydrophosphate, 7 to 14 percent of stone meal, 0.02 to 0.05 percent of wheat enzyme, 15 to 30 percent of sweet potato flour, 0.5 to 2 percent of fish meal, 0.5 to 1 percent of shrimp shell powder, 0.1 to 0.5 percent of fructus crataegi, 0.1 to 0.3 percent of poria cocos, 0.2 to 0.6 percent of wrinkled gianthyssop herb, 0.2 to 0.8 percent of folium isatidis, 0.4 percent of licorice roots, 0.01 percent of antioxidant, 0.02 percent of stress inhibitor, 0.02 percent of phytase and 0.05 percent of complex enzyme. The feed has the advantages of high nutritional value, simple preparation, low cost and suitability for the public to buy.

The invention discloses a rotary all-dimensional lighting soil cultivation vegetable planting machine for a balcony. The machine comprises a base, an electric control rotary disc and a cultivation frame, wherein the electric control rotary disc is installed on the base; the cultivation frame is installed on the electric control rotary disc; the cultivation frame comprises a plurality of layers ofplanting discs; every two layers of planting discs are fixedly connected through a plurality of connecting short columns; fixing glass is arranged between most two adjacent connecting short columns onthe same layer; sliding glass serving as a sliding door is installed between the outer edges of the upper end surface and the lower end surface of a planting disc; planting splicing plates used for planting vegetables, flowers and the like are placed in the planting disc; the planting splicing plates enable the soil texture of the cultivated plants to be reduced, are light, simple and convenientand are convenient for planting; and a lot of water seepage and ventilation through holes are formed in the bottoms of the planting splicing plates. A glass outer cover is directly arranged on the cultivation frame, so that raw materials are saved, the cost is reduced, and the machine is more suitable for the public to purchase and use. Nutrient soil fills in the planting splicing plates, and thenfavorite vegetables and flowers are planted, so that fresh and healthy vegetables can be eaten, the environment can be beautified, and the air quality can be improved.

The invention discloses pig feed. The pig feed is prepared from the following raw materials in parts by weight: 50 percent of corn, 20 percent of bean meal, 2 percent of soybean oil, 25 percent of wheat bran, 4 percent of Muzhumei, 3 part percent of rhizoma cyperi, 2 percent of bighead atractylodes rhizome, 1 percent of pulsatilla radix, 0.5 part percent of complex enzyme, 10 percent of herb of metaplexis japonica, 1 percent of medicated leaven, 3 percent of radix aucklandiae, 5 percent of shrimp meal, 10 percent of soybeans and 20 percent of wheat bran. The pig feed has the advantages of high nutritional value, simple preparation, low cost and suitability for the public to buy.

The invention discloses a small duplex apartment with lower main floor and upper auxiliary floor. The small duplex apartment with lower main floor and upper auxiliary floor consists of a main floor and an auxiliary floor, and belongs to the field of residence building; the small duplex apartment is characterized in that: (1) standard floors are divided from the bottom up into three floors including the first standard floor, the second standard floor and the third standard floor, wherein the first standard floor is the main floor, and the auxiliary floor is one portion of the second standard floor; (2) floor height of the main floor is greater than the standard floor height of the conventional single-layer apartment; the floor height of the auxiliary floor is less than the standard floor height of the conventional single-layer apartment. The small duplex apartment with upper main floor and lower auxiliary floor has the advantages that: (1) the life quality is good; (2) the study efficiency is high; (3) the space utilization ratio is high; (4) affordable to low and middle income families.

The invention relates to a roller crusher with adjustable transmission efficiency. The roller crusher comprises crushing rollers, driving wheels, driven wheels, driving devices and position adjustingmechanisms. The at least two crushing rollers are arranged in parallel; the central shaft end of each crushing roller is connected with the corresponding driven wheel; the output shaft ends of the driving devices are connected with the driving wheels; and the corresponding driving wheels are connected with the corresponding driven wheels through transmission belts. Under the driving of the respective driving devices, the two adjacent crushing rollers rotate in opposite directions; each driving device is connected with the corresponding position adjusting mechanism; and under the action of theposition adjusting mechanisms, the corresponding driving devices move to change the distance between the driving wheels and the corresponding driven wheels, so that the transmission efficiency is adjusted, and rapid crushing of various ores is realized; the ore crushing size can be adjusted, so that the crushing effect is improved; the roller crusher is high in universality and suitable for smalland medium-sized enterprises; and in addition, due to the design of the double crushing rollers, the service life is prolonged.