1219results about How to "Has a buffering effect" patented technology

The invention relates to a biomass magnetic carbon material for degrading organic dye. The material is prepared by mixing a biological raw material and an iron precursor at a ratio of (2-20kg):1kg. Meanwhile, the invention also discloses a preparation method of the biomass magnetic carbon material. The biomass magnetic carbon material provided by the invention is cheap and efficient and has double effects of adsorption catalysis and degradation; serving as an efficient catalyst in a process of constructing a Fenton-like system for treating high-concentration wastewater, the biomass magnetic carbon material has high catalytic activity in thoroughly oxidizing and degrading organic dye; the degradation effect is better than that of a ferrous ion homogeneous catalysis reaction and a Fenton-like reaction taking ferroferric oxide as a catalyst.

The invention discloses a light active and passive combined lower-limb power-assisted exoskeleton robot. A back and a waist are arranged up and down; a waist bundling connecting piece on the waist is connected with a back supporting piece on the back; hip joint rotary shafts on hip joints are hinged to waist hip connecting pieces on the waist; a spring upper pressing plates on the hip joints are connected with a spring adjusting plate; the spring adjusting plate is positioned at the upper end of the back supporting piece and is connected with the back supporting piece; leading pulley seats are fixedly connected with a waist fixing plate on the waist; the upper ends of thighs are hinged to connecting plates on the hip joints through leg hip connecting shafts; steel wire fixed parts on the hip joints are fixedly mounted on outer walls of thighs; the lower ends of the thighs are hinged to the upper ends of knee joint supporting shells through knee joint connecting shafts; a motor encoder, a motor, a speed reducer, a coupler and a lead screw are sequentially arranged in a knee joint from top to bottom; the upper end of shanks are connected with the knee joint supporting shells; and the lower ends of the shanks are hinged to feet through foot joint shafts. The light active and passive combined lower-limb power-assisted exoskeleton robot is used for military loadbearing.

The invention discloses a toilet seat overturning driving control method. A fixing seat mounted on the surface of a toilet serves as a carrier, a swing component is mounted on the fixing seat through a rotating shaft, a transmission portion and a driving portion, which are used for driving the swing component to overturn upwards, are arranged, the driving portion forces the swing component to overturn upwards along the free rotating shaft through the transmission portion, and the swing component pushes a seat to overturn upwards while overturning upwards. The toilet seat overturns by 90 degrees by being driven by a pedal, the purposes that the toilet seat overturns when a user comes and pedals, and falls automatically when the user leaves are achieved, and accordingly the toilet seat is quite convenient to use; the user does not need to touch the toilet seat by hands, so that sanitation is achieved; wide popularization and low cost are achieved without modifications on existing toilets or toilet seats; normal use of the toilet cannot be affected, and good concealing performance is achieved; the toilet is most simplified and optimized in structure, easy to implement, simple to assemble and attractive and appropriate in appearance.

The invention provides a hanging movement type power generation assembly, which comprises a hanging unit, a buffering unit, a transmission unit and a power generation unit (18). The hanging unit is hung on a moving body, the buffering unit is used for acquiring movement kinetic energy generated in an activity or movement process of the moving body, the transmission unit is used for transmitting the movement kinetic energy, the buffering unit, the transmission unit and the power generation unit are disposed on the hanging unit and are successively connected, the transmission unit transmits the movement kinetic energy acquired by the buffering unit to the power generation unit (18), and the power generation unit (18) converts the movement kinetic energy transmitted by the transmission unit into electric energy. The invention further discloses a backpack comprising the hanging movement type power generation assembly. The power generation assembly converts the movement kinetic energy into the electric energy, and accordingly can provide the electric energy for small-sized or miniature electrical equipment in the backpack, further, the electric energy is continuously effective, and the hanging movement type power generation assembly is energy-saving and environment-friendly.

The present invention relates to a valve body for a gas stove, comprising a housing and a valve core, wherein inside the valve core there is provided a valve needle, above the valve needle there is provided a knob rod, the lower portion of the valve needle abuts against a boss at one end of a top rod, the other end of the top rod is provided with a push arm abutting against one end of an electromagnetic valve, a child lock on the valve body is unlocked in the process of pressing down the knob rod and a gas pipe is got through in a manner of rotation, the knob rod enables the actuation surfaces inside the valve body to mutually absorbed in the pressing-down process of the knob rod, the knob rod is pressed down to unlock the child lock using a stroke called as A, the knob is pressed down to enable the actuation surfaces inside the electromagnetic valve to mutually absorbed using a stroke called as B, and all the strokes of pressing down the knob rod are called as C (C>=A>=B). The valve body for a gas stove can ensure the absorption of the actuation surfaces inside the electromagnetic valve before unlocking the child lock, and also can ensure the smooth of the igniting, is provided with a function of buffer, can protect the top electromagnetic valve mechanism from being damaged by the action of an acting force, and enables the service life of the top electromagnetic valve mechanism to be prolonged.

The invention discloses biological compound fertilizer containing organic and inorganic components and a preparation method thereof. The compound fertilizer comprises beneficial microorganism flora, organic matter, humic acid and inorganic nutrient. The preparation method comprises the following steps of: grinding the raw materials including 50-60% of organic matter, 5-10% of humic acid and 20-40% of inorganic nutrient by a grinder into powder of 80-120 meshes; putting 50-100 million beneficial bacteria per gram of product into a mixer, uniformly mixing and feeding into a granulator for granulation; drying, cooling and screening; and finally packing to obtain a finished product, wherein organic matter accounts for 20-30%, and humic acid accounts for 3-5%; in the inorganic nutrient, major elements account for 15-25%, the secondary elements account for 5-10%, and the trace elements account for 1-2%; and each gram of the finished product contains 30-50 million beneficial bacteria. The fertilizer disclosed by the invention is suitable for any crop; the fertilizing experiments of the fertilizer are conducted on paddy rice, cotton, rape, melon and fruit, wheat and vegetables; and the results show that: the yield of the experimental group is increased by 15-30% over the control group without using the fertilizer, and the yield increasing effect is obvious.

The invention provides a flexible stab-proof fabric and a production method thereof, wherein the flexible stab-proof fabric comprises an inner layer, a first protective layer, a first connection layer, a second protective layer and a stab-proof layer which are stacked sequentially from inside to outside; the stab-proof layer includes stab-proof pieces and buffer protrusions, the stab-proof piecesare exposed, the buffer protrusions are positioned in the stab-proof layer, and the buffer protrusions are filled with a buffer liquid; the production method of the flexible stab-proof fabric comprises forming the buffer protrusions and the stab-proof piece , injecting the buffer liquid, weaving the layers, and spread-quilting the layers. The flexible stab-proof fabric has good stab resistance, iscapable of buffering external impact, and is light in weight and comfortable to wear, and the production method provided herein is simple and facilitates production.

The invention belongs to the technical field of building shock-isolated bearings, and discloses a three-dimensional shock-isolated bearing and a preparation method for the three-dimensional shock-isolated bearing. The three-dimensional shock-isolated bearing is mainly technically characterized by comprising a laminated rubber shock-isolated bearing body, wherein a lower connection plate is arranged below the laminated rubber shock-isolated bearing body; a basin-type shear-resistant plate and a basin-type upper connection plate are arranged on the laminated rubber shock-isolated bearing body; the lower connection plate is connected with the basin-type upper connection plate via a pull-resistant limit rod; an inner pull plate is arranged on the basin inner wall of the basin-type upper connection plate; an outer pull plate matched with the inner pull plate is arranged on the basin outer wall of the basin-type shear-resistant plate; a support guide shaft is arranged on the top surface of the basin-type shear-resistant plate; a composite spring layer composed of a disc spring and multilayer rubber sheets is sleeved on the support guide shaft; and a guide groove matched with the support guide shaft is arranged on the bottom surface of the basin-type upper connection plate. The three-dimensional shock-isolated bearing disclosed by the invention can bear either a great vertical bearing force or a large pull force, and has certain stiffness and damping force in the vertical direction and the horizontal direction.

The invention relates to a porous ferric oxide / carbon nanometer plate composite material as well as a preparation method of the porous ferric oxide / carbon nanometer plate composite material and application in preparing a lithium ion battery. The method comprises the following steps of uniformly mixing raw materials including ferrocene and ammonium sulfate in a given mass ratio; calcining the mixture in an inert gas high-pressure reaction kettle, then calcining the mixture in the air at a low temperature to obtain the porous ferric oxide / carbon nanometer plate composite material. The preparation method is simple in process, easy to operate, high in yield and applicable to the mass production. When being used as a lithium ion battery cathode material, the prepared porous ferric oxide / carbon nanometer plate composite material is high in specific capacity and excellent in circulation stability, and the capacity of the material is more than 1000mAh / g after being circulated for 100 times.

The invention discloses a rear-hanging type pedestal pan cushion turning and driving device and a fixing seat. The rear-hanging type pedestal pan cushion turning and driving device comprises a turning portion, a transmission portion and a pedal portion; the turning portion comprises the fixing seat and a swinging part, the fixing seat is arranged on an outer frame located on the root of a cushion rotation seat in a sleeving or wrapping mode, the fixing seat is hinged to the swinging part, and the position of a movable support arranged on the fixed seat corresponds to that of a fixed support arranged on the swinging part; a first-end stop block of a brake cable of the transmission portion is fixed in the movable support in a clamping mode, the first end of a brake tube is jammed in the fixed support, and the tail end of the brake cable and the tail end of the brake tube are fixed on a front support and a rear support of the pedal portion in a clamping mode respectively. According to the rear-hanging type pedestal pan cushion turning and driving device and the fixing seat, a pedestal pan cushion is driven by a pedal to rotate ninety degrees, the purposes that the pedal is turned over when a person comes and automatically drops when the person leaves, use is very convenient, the hand does not need to touch the pedestal pan cushion, and cleanliness and sanitation are achieved; any modification does not need to be performed on an existing pedestal pan or cushion, and therefore the advantages of being wider in popularization and low in cost can be achieved; normal usage of the pedestal pan is not influenced, the invisibility is good, and the appearance is attractive and appropriate.

The invention provides an ultrasonic testing device for a circumferential weld of a cylinder of a nuclear reactor pressure vessel. The ultrasonic testing device comprises a ball screw and a nut seat, wherein the ball screw is vertically arranged, the nut seat is sleeved on the ball screw, and a drive element is connected with the ball screw; the ball screw and the drive element are fixed on a base plate; one side of the base plate is fixed at one end of an inner sleeve, the inner sleeve is connected with a stretchable air cylinder, and the inner sleeve and the stretchable air cylinder are arranged in an outer sleeve; one end of a spring rope is fixed on the outer sleeve, and the other end of the spring rope is fixed on the base plate; a rotary air cylinder is fixed on one side of the nut seat, and a tray is fixed at the end part of the rotary air cylinder; the tray can rotate by 90 degrees through the rotary air cylinder, can extend and shrink through the extending and shrinking of the base plate and is driven to move up and down through the up-down moving of the nut seat. The ultrasonic testing device provided by the invention can be used for carrying out ultrasonic testing on the weld according to relevant examining code requirements, so that the accuracy and reliability of the data testing are improved, and the radiation of radioactive rays to a human body is reduced.

The invention provides a nut shelling and sorting machine which comprises a housing case, a housing case cover, a feeding mechanism, a cracking mechanism and a separating mechanism. The feeding mechanism comprises a feeding hopper and a rotary evening rod; the cracking mechanism comprises fixed and rotary scrubbing squeezing discs, damping springs, adjusting bolts, a motor, a motor shaft and a motor support frame, and the fixed and rotary scrubbing squeezing discs are respectively provided with rubber scrubbing layers; a scrubbing squeezing channel with a gradually reduced gap is outwardly formed between the two rubber scrubbing layers, and the size of the gap at an outlet of the scrubbing squeezing channel is slightly larger than the average diameter of nuts; the separating mechanism comprises air inlet pipes, an annular blow pipe, a distributing hopper, a crushed shell discharge hopper, a kernel buffer nut, a kernel passing plate and a kernel discharge outlet; and the kernel buffer net is annularly and fixedly mounted along the inner wall of the housing case. Compared with the prior art, the nut shelling and sorting machine has the advantages of capabilities of uniformly and orderly feeding the nuts and thoroughly separating kernels from shells, and high shelling efficiency and kernel completeness rate.

The invention discloses a special fertilizer used for assisting yield increase of paddy rice. The special fertilizer comprises the following raw materials: a rapeseed cake, fermented pig manure, urea, ammonium sulfate, calcium nitrate, diammonium phosphate, potassium chloride, magnesium sulfate, zinc sulfate, sodium selenate, ammonium molybdate, copper sulphate and a soil conditioner. The soil conditioner comprises the following components: bentonite, perlite, citric acid, oxalic acid, nitrohumic acid, a phosphate-dissolving bacterium, dicyandiamide, N-butylthiophosphoryl triamide, polyethylene glycol and acrylamide. The special fertilizer used for assisting yield increase of paddy rice in the invention has a scientific formula and reasonable nutrients; and when applied in plantation of paddy rice, the special fertilizer can improve the utilization rate of fertilizers, resist lodging and insect attack, increase the output of paddy rice, improve the quality of paddy rice, enhance physical and chemical properties of soil and prevent soil hardening.

The invention relates to an automatic board clamping device and a locating clamping method thereof. The automatic board clamping device comprises a baseboard, a movable track assembly, a fixed track assembly, a width adjusting mechanism and a control assembly, and a PCB jacking and clamping mechanism and a PCB locating mechanism are arranged on the movable track assembly and the fixed track assembly; a PCB induction mechanism is further arranged between the movable track assembly and the fixed track assembly; the fixed track assembly and the movable track assembly are arranged on the baseboard, and the fixed track assembly and the width adjusting mechanism are fixedly arranged on the baseboard; the movable track assembly is movably installed on a width adjusting lead screw of the width adjusting mechanism; and the movable track assembly is transversely moved relative to the baseboard under the action of the width adjusting mechanism, and used for adjusting the distance between the two track assemblies. The automatic board clamping device is matched with the locating clamping method, so that PCBs in different widths can be efficiently, stably and accurately processed, and the product quality of the PCBs is improved.

The invention discloses a push-type can opening device and relates to the technical field of bottle opening tools. The push-type can opening device includes a tightening mechanism, wherein the upper surface of the tightening mechanism is fixedly connected with a sealing mechanism; a negative pressure locking mechanism is fixedly connected with parts on the upper surface of the tightening mechanismand the left and right sides of the sealing mechanism; the surface of the negative pressure locking mechanism is slidably connected with the inner wall of the tightening mechanism; and the inner wallof the negative pressure locking mechanism cooperates with the surface of the sealing mechanism. According to the push-type can opening device, after a bottle cap clamping rod clamps a bottle cap body, a second elastic rubber block has a movable contraction function; a handle bar is pulled in order that a threaded sleeve continues moving up; a rotary second hinge rod has a twisting effect on thebottle cap body so as to twist off the bottle cap body on a can bottle can body. By converting the grip force into twisting force, the push-type can opening device can open the cap with one hand, suchthat a one-armed person can open the can bottle cap with one hand.

The invention relates to a composite filler of a biological filter, as well as a biological deodorization method and device with the composite filler. The composite filler includes a first filler layer and a second filler layer above the first filler layer, wherein the first filler layer is made of a porous material; and the second filler layer is made from 60%-80% of fully fermented compost, 10%-30% of wood dust or straws and 5%-10% of zeolite or porous ceramsite according to percent by volume, which are uniformly mixed. The composite filler can completely decompose malodorous gas generated by the closed compost, and is placed in the biological filter for deodorization according to the following steps of: aerating a closed compost reactor by a blower, fermenting in the closed compost reactor, introducing the gas generated during the fermentation into the biological filter via a gas inlet through a pipeline, performing biological deodorization on the gas by the composite filler, and discharging the gas from the top of the biological filter. According to the invention, the deodorization effect is good, air is not required to be introduced additionally, and a humidifying device is not needed, so that the running cost is low, and the popularization of a compost technology is facilitated.

The invention relates to a balance weight buffering type height limiting frame, and belongs to the field of highway facilities. The balance weight buffering type height limiting frame comprises stand columns separately standing on the two sides of a highway, two guide rails are fixed to the upper ends of the two stand columns respectively and are parallel, and a height limiting rod is arranged in the two guide rails. A first pulley and a second pulley are arranged on the outer sides of the guide rails respectively, and the first pulley is located in front of the original position of the height limiting rod. One end of a steel cable is fixed to the height limiting rod, and the other end of the steel cable winds across the first pulley and the second pulley and then is connected with a balance weight. The balance weight is arranged in a deep well below the second pulley, and the gravity of the balance weight is used for providing buffer for the height limiting frame, so that direct collision between vehicles and the height limiting frame is avoided, damage to the height limiting frame and the vehicles is reduced, and personal safety of drivers is guaranteed.

The invention relates to the field of pipe fitting polishing, and discloses a pipe fitting polishing device. The pipe fitting polishing device comprises a machine frame and a supporting table, a conveying roller is rotationally connected to the supporting table, a clamping ring is rotationally connected to the supporting table, a through hole is formed in the middle portion of the clamping ring, driving teeth are arranged on the outer wall of the clamping ring, the interiors of the driving teeth are hollow, abutting-against rods are fixedly connected to the top ends of the interiors of the driving teeth, the other ends of the abutting-against rods are fixedly connected with abutting-against blocks, first supporting springs are fixedly connected between the top ends of the interiors of thedriving teeth and the outer wall of the clamping ring, a rack is in sliding connection to one side of the supporting table, a reset spring is fixedly connected to the upper portion of the rack, and anair bag is arranged above the rack and is opposite to the rack; and an air cylinder is in sliding connection to the supporting table, a guide pipe is connected between the air cylinder and the air bag, polishing strips are fixedly connected to the supporting table and are located on the opposite sides of the supporting plate, and the supporting table is further provided with a pushing mechanism used for pushing and abutting against the air cylinder. By means of device, the problem that a traditional polishing device cannot evenly polish a pipe fitting or local polishing is excessive is solved.

The invention discloses a multi-connecting-rod anti-collision mechanism and an intelligent moving body. The anti-collision mechanism comprises a collision rod, a connecting rod mechanism and a telescopic mechanism, wherein the connecting rod mechanism comprises a first supporting rod and a second supporting rod, the first supporting rod is in rotating connection with the intelligent moving body and the collision rod and is in rotating and sliding connection with the telescopic mechanism, and the second supporting rod is in rotating and sliding connection with the intelligent moving body and the collision rod and is in rotating connection with the telescopic mechanism; the telescopic mechanism comprises a spring and moves in the compressing direction of the spring. According to the anti-collision mechanism, connecting rods can rotate and slide relatively, and the connecting rods and a vehicle body can rotate and slide relatively; when the anti-collision mechanism collides with an object by different angles and at different positions, the connecting rod mechanism and the telescopic mechanism are pushed to move backwards, a buffering effect is realized, a collision signal can be generated when the tail of the telescopic mechanism makes contact with a touch sensor, the intelligent moving body can give an instruction, such as stopping power output, according to the collision signal, and then further damage is avoided.

The invention belongs to the technical field of building shock-isolated bearings, and discloses a three-dimensional shock-isolated bearing and a preparation method for the three-dimensional shock-isolated bearing. The three-dimensional shock-isolated bearing is mainly technically characterized by comprising a laminated rubber shock-isolated bearing body, wherein a lower connection plate is arranged below the laminated rubber shock-isolated bearing body; a basin-type shear-resistant plate and a basin-type upper connection plate are arranged on the laminated rubber shock-isolated bearing body; the lower connection plate is connected with the basin-type upper connection plate via a pull-resistant limit rod; an inner pull plate is arranged on the basin inner wall of the basin-type upper connection plate; an outer pull plate matched with the inner pull plate is arranged on the basin outer wall of the basin-type shear-resistant plate; a support guide shaft is arranged on the top surface of the basin-type shear-resistant plate; a composite spring layer composed of a disc spring and multilayer rubber sheets is sleeved on the support guide shaft; and a guide groove matched with the support guide shaft is arranged on the bottom surface of the basin-type upper connection plate. The three-dimensional shock-isolated bearing disclosed by the invention can bear either a great vertical bearing force or a large pull force, and has certain stiffness and damping force in the vertical direction and the horizontal direction.

The invention provides an ultrasonic detection device for a circumferential weld of a bottom head of a reactor pressure vessel. The device comprises a rack, an oscillating gear and an oscillating rod which are connected by a rotary shaft, wherein the oscillating gear and the oscillating rod are connected by a thread; a driving element drives the oscillating gear to oscillate so as to enable the oscillating rod to oscillate around the rotary shaft; a linear guide rail and a retractable air cylinder are fixedly arranged above the oscillating rod; a slide block is arranged on the linear guide rail and a stretching-out rod is fixedly arranged on the slide block; one end of the stretching-out rod is connected with the retractable air cylinder and the other end of the stretching-out rod is connected with a tray; the stretching-out rod is retracted under the effect of the retractable air cylinder so as to drive the tray to be stretched out and taken back. According to the device, the accuracy and the reliability of detection data can be improved and the irradiation to a human body by radioactive rays is reduced.

The invention discloses a cleaning device for a dust removal filter cartridge. The cleaning device comprises a bottom plate, the left side of the upper surface of the bottom plate is fixedly connectedwith the bottom end of a first support plate, a thread cap is connected at the bottom part of the first support plate in a clamping way, a thread rod is in thread connection on the inner wall of thethread cap, the left end of the thread rod is fixedly connected with the right side of a handle, the right end of the thread rod is rotatably connected with a bearing pedestal, and the right side surface of the bearing pedestal is fixedly connected with the left side surface of a first clamping plate. The cleaning device for the dust removal filter cartridge is provided with the thread rod, the first clamping plate, a first telescopic rod, a spring, a second clamping plate, an electric push rod, a drive motor, a cleaning brush, a water pump, a water tank and a filter screen, so that the dust in the folds of a dust removal filter cartridge body is completely cleaned, the time and the labor are saved, the cleaning efficiency is high, the optimal use effect is achieved, meanwhile, the cleanedwater is repeatedly used, the functional diversity is improved, and the dust is prevented from being inhaled in the body of a worker to affect the body health in the process of manual cleaning.

The invention relates to a pole tower and transformer substation grounding calcium bentonite base resistance reducing agent. A recipe consists of the following ingredients in parts by mass: 1 to 99 percent of calcium bentonite, 1 to 30 percent of carbon fiber, 0.1 to 30 percent of ammonium chloride, 0.1 to 30 percent of calcium carbonate, 0.1 to 30 percent of zinc powder, 0.1 to 30 percent of copper powder, 0.1 to 60 percent of ammonium persulfate, 0.1 to 15 percent of sodium molybdate, 5 to 60 percent of electroconductive cement, 0.1 to 6 percent of graphene, 0.1 to 30 percent of aluminum powder, 0.1 to 60 percent of phenylamine and 0.1 to 15 percent of sodium tripolyphosphate. The resistance reducing agent belongs to a physical grounding resistance reducing agent, overcomes the defects of great packaging and construction difficulty and the like of the existing resistance reducing agent, solves the problem of strong corrosion performance of strong electrolyte, strong acid and strong base in the existing chemical resistance reducing agent, and solves the problem that a grounding body cannot normally work. The resistance reducing agent provided by the invention is applicable to acid soil areas, mountainous areas, rock areas, sand land and high-corrosion regions.

The invention relates to a bio-carbon based iron carbide material for degrading dyes. The material is prepared by mixing bio-carbon and an iron precursor according to a mass ratio of 1:2. At the sametime, the invention also discloses a preparation method of the bio-carbon based iron carbide material. The price is cheap. The iron carbide material is high efficient, has dual functions of adsorptionand degradation, can be repeatedly used in cycle, and can stably exist under different alkali / acid conditions. The degrading effect is better than that of zero valent iron and bio-carbon.

The invention discloses a composite barrier structure having the self-restoration capability. The composite obstruction structure has a plurality of functional structure layers, and includes a basic Al2O3 layer, a middle aluminium layer, a middle Al2O3 layer, and an external compact structure layer that are successively superposed on a substrate, the basic Al2O3 layer forms a first barrier layer, the external compact structure layer can obstruct water and oxygen molecules to pass through, the middle Al2O3 layer and the external compact structure layer form a second barrier layer together, a pure aluminium layer is a repairing agent layer which supplies Al atoms when the superposed basic Al2O3 layer and middle Al2O3 layer have slit defects, and the Al atoms spontaneously oxidate at the defect parts to form Al2O3 to fill the corresponding defects. The composite barrier structure having the self-restoration capability has an excellent water and oxygen barrier property, an excellent repeated bending property, and the self-restoration capability after the defects are formed, and has wide application prospects on the improvement of the water and oxygen barrier property and the bending property of a flexible substrate.

The invention discloses a chair waist supporting device, and belongs to an accessory of a chair. According to the chair waist supporting device, the problem that an elastic body supporting piece of the conventional supporting device can not meet a requirement for precisely adjusting the convex degree and the supporting position of a waist part and the problem of low buffering performance of a rigid body supporting piece are solved, and requirements of people on comfortableness can be met. The chair waist supporting device comprises a front supporting plate and a rear supporting plate, wherein a compression spring and a convex degree adjustment transmission mechanism are arranged between the front supporting plate and the rear supporting plate; the convex degree adjustment transmission mechanism consists of a left swing arm, a right swing arm, an elastic pressure plate, a convex degree transmission screw rod, a left pull rod and a right pull rod; a convex degree adjustment speed changing box and a convex degree adjustment motor are arranged on the inner side of the rear supporting plate; a position adjustment transmission motor and a position adjustment speed changing box are arranged on the outer side of the rear supporting plate; a bracket is arranged in back of the rear supporting plate; and supporting arms at two ends of the bracket are arranged in through holes of a rear fixing hinge seat on the rear supporting plate.

The invention provides a grounding calcium bentonite-based resistance-reducing agent, comprising(according to mass percent) 1-99%calcium bentonite; 1-30% carbon fiber; 0.1-30% ammonium chloride; 0.1-30% calcium oxide; 0.1-30% zinc powder; 0.1-30% nickel powder; 0.1-60%ammonium persulfate; 0.1-15% sodium molybdate; 5-60% electroconductive cement; 0.1-6% grapheme; 0.1-30%aluminite powder; 0.1-60% aniline; and 0.1-15% sodium tripolyphosphate. The grounding calcium bentonite-based resistance-reducing agent is a physical grounding resistance-reducing agent, overcomes the disadvantage of difficulty in package and construction of a present resistance-reducing agent, solves the problems of stronger corrosivity of the strong electrolyte and strong acid and strong base in the present resistance-reducing agent, and the problem of incapability of long-term normal service of a grounding body, and is suitable for acid soil regions, mountain regions, rock, sand and high corrosion regions.