931results about How to "Reduce secondary damage" patented technology

The invention relates to a medical hydrogel dressings and a preparation method thereof. The hydrogel dressings is prepared by taking 10-30% by mass of starch and 2-15% by mass of water-soluble polymer as raw materials, utilizing a guanidinesalt polycondensate as an anti-bacterial agent, adding a cross-linking agent, and reacting at the temperature of 40-80 DEG C. The operation steps are as follows: adding the starch and the water-soluble polymer in a solvent to prepare into a solution, regulating the pH value of the solution by a NaOH solution, heating for gelatinization, cooling, adding the anti-bacterial agent and the cross-linking agent, stirring to form a mixed solution, pouring the mixed solution into a die, and reacting at the temperature of 40-80 DEG C to obtain the anti-bacterial hydrogel. Compared with the prior art, the hydrogel dressings in the invention has the advantages of good swelling property, high transparency, moderate mechanic strength, excellent bacteria invasion resistance, wide raw material sources, cheap raw materials, good tissue compatibility and favorable medical application prospect, and can effectively prevent wound infection.

The invention discloses concrete healant, which comprises following components by weight percent: 30 to 55 percent of gelatinization materials, 40 to 65 percent of fine aggregates, 0.1 to 0.5 percent of water reducing component, 0.05 to 0.5 percent of early-strengthening component, 0.05 to 0.2 percent of delayed-coagulation component, 0.2 to 1.0 percent of nano materials, 0.5 to 1.0 percent of high-activity substances, 0.01 to 0.2 percent of water retention thickening component, 0.2 to 2.0 percent of polymer and 0.02 to 0.2 percent of defoaming agent. The concrete healant not only has characteristics of good mobility, fast strength development, high adhesion strength and small retraction, but also can fill active substances into original concrete gaps and can produce compact crystals, so that the cohesion strength of the new and the old concrete interfaces can be remarkably improved, and the concrete healant is applicable to the concrete mending projects of bridges, caves, industrial workshops and civil construction.

The invention discloses a barium-strontium-calcium descaling and blockage removing agent for a near-well area and a preparing method of the barium-strontium-calcium descaling and blockage removing agent. The barium-strontium-calcium descaling and blockage removing agent comprises a polyamine carboxylate solution, nonionic surfactant accounting for 3%-10% of the total mass of the polyamine carboxylate solution and an emulsion breaker accounting for 2%-8% of the total mass of the polyamine carboxylate solution. The polyamine carboxylate solution is prepared from polyamine midbody and chloroacetic acid salt through a reaction, wherein the polyamine midbody is prepared through organic amine and epoxy chloropropane with the mole ratio of 1.05-1.5:1 through a reaction, and the chloroacetic acid salt is prepared from chloroacetic acid and alkali with the same mole ratio through a reaction. The barium-strontium-calcium descaling and blockage removing agent for the near-well area has a good removing effect on indissolvable salt such as barium sulfate, strontium sulfate and calcium sulfate, and the descaling rate is higher than 40%. Meanwhile, the barium-strontium-calcium descaling and blockage removing agent has the expansion preventing and inhibiting performance, the clay expansion reducing rate is higher than 80%, corrosion to equipment is slight, and water locking can be avoided. Blockage removing can be effectively achieved on a reservoir stratum near a well, the permeability of the reservoir stratum is improved, and thus the recovery ratio of oil and gas resources is increased.

The invention discloses an intelligent weeding robot system based on depth vision, and belongs to the technical field of intelligent robots. The system includes an industrial personal computer, a power module, a dolly body, a crawler wheel, a hydraulic claw and weeding equipment. The crawler wheel driven by a driving wheel drive device is installed on the dolly body. The hydraulic claw and the weeding equipment are installed on the dolly body through a weeding mechanical arm device used for adjusting the postures of the hydraulic claw and the weeding equipment. The driving wheel drive device,the hydraulic claw and the weeding equipment are all powered by the power module and controlled by the industrial personal computer. The system further includes a depth camera module for measuring therelative position relationship of weeds, crops and the dolly body. The system has the advantages that the interaction function of two mechanical arms can be achieved by the interactive work of a single mechanical arm, and meanwhile a precise weeding method is adopted and can effectively reduce the secondary damage to crops and greatly promote the application and development of intelligent weedingrobots on the premise of ensuring the weeding efficiency and accuracy.

The invention discloses clean carbon dioxide foam fracturing fluid and a preparation method thereof, and relates to the technical field of oilfield chemistry and fracturing production increase. The carbon dioxide foam fracturing fluid is mainly composed of a base solution, a foaming agent, a gel breaker and liquid carbon dioxide with the mass ratio being 100 to 0.15-0.45 to 0.02-0.08 to 100-900. The base solution is formed by 0.2%-0.55% of a thickening agent and water. The thickening agent is mainly formed by bisacrylamide, vinyl pyrrolidone, kation unsaturated monomer, anion unsaturated monomer, an initiator, sodium carbonate, an emulsifying agent and a hydrotropy agent. The foaming agent is mainly formed by hexadecyl dimethyl tertiary amine, dimethyl sulfate, caustic soda flakes, potassium persulfate and solvent. The clean carbon dioxide foam fracturing fluid has the advantages of being high in foam stability, high in temperature resistance and shear resistance, high in sand-carrying performance, wide in applicable temperature range, extremely low in residue content, high in backflow performance, and small in secondary damage to a reservoir after fracturing, thereby improving the fracturing effect and increasing the reservoir productivity.

A system is provided for remotely detecting and locating damaged conductors. The system includes at least one slave controller disposed proximate at least one load and electrically connected to the loads via at least one conductor. The slave controller includes at least one solid-state switch capable of controllably altering the input current to the loads, as well as at least one measuring element for measuring at least one parameter associated with the loads and the solid-state switches. The solid-state switch can controllably alter the input current to the loads according to the parameters. The system also includes at least one damaged wire detector electrically connected to the conductors between the slave controller and the loads. The damaged wire detector is capable of detecting and / or locating at least one damaged conductor.

The invention discloses an air cushion type operation patient transfer trolley and belongs to the technical field of medical instruments. The air cushion type operation patient transfer trolley comprises a transfer bed and a transfer trolley body, the air cushion type transfer bed is placed on a transfer trolley plate of the transfer trolley body and locked by a locking frame, the transfer trolley body comprises a main transfer trolley body, a transfer trolley base and a lifting frame, the main transfer trolley body is supported on the transfer trolley base through the lifting frame, the transfer bed is an air cushion type transfer bed which is mainly composed of an air cushion bed framework, an air cushion bracket and an air cushion, and the air cushion is formed by a front portion and a rear portion which are connected through a zipper. According to the air cushion type operation patient transfer trolley, a patient is transferred by means of an air cushion technology, the patient is not required to be moved again in the transferring process, labor intensity of medical workers is reduced, body positions of the patient are not required to be moved when the patient is transferred from the transfer trolley to an operating bed, pains of and secondary injuries to the patient during transferring are reduced, merely one medical worker is required to transfer the patient from a hospital bed to the operating bed, the operation is simple and convenient, and the transfer trolley is suitable for a hospital to transfer a seriously injured patient from an ambulance to an operating room.

The invention relates to a catalytic coolant used in a hot aerosol fire extinguishing device and a processing technique of the catalytic coolant. As to the coolant, heat absorption cooling components mainly include manganese carbonate or manganese oxalate, manganese phosphate, potassium manganate, metal carbonate of a family I, a family II and a transition family, basic carbonate, oxalate and the like; a metal oxide or a hydroxide are adopted as a catalyst, an oxidant and a reinforcing filling; stearate, graphite and the like are adopted as a processing aid; composite solution of alkalis silicate and a water soluble polymer is adopted as an adhesive; and film materials such as hydroxymethyl or hydroxyethyl cellulose are adopted as a surface coating agent. The processing technique includes the steps of mould pressing, squeezing, pelletizing, coating and forming. Compared with the prior art, the catalytic coolant not only has high intensity and good cooling effect, but also can reduce secondary damage of an extinguishing agent and eliminate the content of poisonous gases in an extinguishing agent product so as to improve the environmental safety of the extinguishing agent.

The invention discloses a cross-linkable high-temperature-resistant residue-free polybasic copolymerizable fracturing fluid and a preparation method thereof. The preparation method comprises the following steps of (1) preparing a thickener for the fracturing fluid; (2) preparing a cross-linking agent for the fracturing fluid; (3) preparing a gel breaker for the fracturing fluid and (4) preparing the cross-linkable high-temperature-resistant residue-free polybasic copolymerizable fracturing fluid. The fracturing fluid prepared by adopting the preparation method has the characteristics of excellent viscoelasticity, temperature resistance and shear resistance, sand-carrying performance and wide applicable temperature range; the fracturing fluid can well meet the requirement on the fracturing construction, and the content of the residue is very low; after the fracturing, the secondary harm to a reservoir is small and thus the fracturing effect is improved and the production capacity of the reservoir is increased.

The invention discloses an automatic bed-transfer stretcher and belongs to the technical field of medical instruments and apparatuses. The automatic bed-transfer stretcher is composed of a base cart, a stretcher bed and a safety bracket. Lifting columns of the base cart and a hydraulic cylinder are supported above a base of the base cart through a cantilever structure and realize ascending and descending of the stretcher. The lower portion of the safety bracket is fixedly connected to the base, the upper portion of the safety bracket is horizontally disposed above the stretcher, and a safety guardrail on the safety bracket and a bed sheet pressing device protect safety of transferred patients. Postoperative patients can be transferred to hospital beds by the aid of the automatic bed-transfer stretcher, body postures of patients are not to be changed during transfer, pain and secondary damage of the patients during transfer are reduced, and a patient can be transferred to a hospital bed from an operating table by only one person. Besides, the automatic bed-transfer stretcher is simple and convenient to operate. By arranging the safety guardrail and a rotating support plate, safety of the patients during transfer is improved, and the automatic bed-transfer stretcher is applicable to transferring postoperative patients to the hospital beds from the operating table.

The invention discloses a preparation method of a high-strength high-conductivity creep-resistant graphene enhanced aluminium alloy material. Aluminium powder is modified to improve the affinity of the aluminium powder to graphene, and after that, semi-solid extrusion is performed to obtain the graphene enhanced aluminium alloy material. The preparation method is simple to operate, adjustable in process and controllable in graphene content; graphene is uniformly dispersed in the aluminium alloy material; the demand on an aluminium matrix is less; the high-strength high-conductivity creep-resistant graphene enhanced aluminium alloy material can be compounded with various aluminium alloys to obtain corresponding graphene enhanced aluminium alloy materials; meanwhile, the integrity of graphene can be maintained to the utmost extent, and the binding force between the high-strength high-conductivity creep-resistant graphene enhanced aluminium alloy material and the matrix is improved. A prepared graphene / aluminium alloy-based composite has the compactness of 98.5% or above, has the conductivity equivalent to that of a matrix aluminium alloy rod piece (more than 61% IACS), and is improved by more than 20% in tensile strength and more than 50% in creep resistance. The preparation method is suitable for preparing the long graphene enhanced aluminium alloy material, and is low in production cost, suitable for industrial production and favorable in market prospect.

Output optical energy pulses including relatively high energy magnitudes and steep slope at the beginning of each pulse are disclosed. As a result of the relatively high energy magnitudes which lead each pulse, the leading edge of each pulse includes a relatively steep slope. This slope is preferably greater than or equal to 5. Additionally, the full-width half-max value of the output optical energy distributions are between 0.025 and 250 microseconds and, more preferably, are about 50-70 microseconds. A flashlamp is used to drive the laser system, and a current is used to drive the flashlamp. A flashlamp current generating circuit includes a solid core inductor which has an inductance of about 50 microhenries and a capacitor which has a capacitance of about 50 microfarads. The output optical energy pulses cut target surfaces by interacting with fluid that is located above, on and / or in the target surface. Methods are disclosed for therapeutically treating tissue with pulses of electromagnetic energy.

The invention provides an active protection system and a method thereof for preventing secondary damage of pedestrians, belongs to the technical field of automobiles and solves the problem that pedestrians are not efficiently protected when vehicles and pedestrians collide in the prior art. The active protection system comprises a vehicular control unit, a collision sensor, an automobile forward sensor, a pedestrian protection air bag device and a capture device. The method includes steps of A, detecting collision acceleration of the collision sensor, and detecting property and prior-collision motion states of an object to be collided by the automobile forward sensor; B, controlling the pedestrian protection air bag device to inflate and unfold an air bag when collision intensity exceeds the threshold; C, predicting flight path of the object according to the collision strength and the collision position, so as to correspondingly simulate moving track parameters of a current capture net and controlling the capture device to capture and wrap the object according to the moving track parameters of the current capture net. By the active protection system and the method thereof, secondary damage to the pedestrians can be effectively prevented, and safety of the pedestrians is protected to the greatest extent.

The invention discloses a knee-joint operation adjusting and fixing distraction device which comprises a foot posture adjusting fixing apparatus capable of performing stepless continuous position adjustment and fixing in the front-back direction of a guide rail and rotating at 3360 degrees, a foot-thigh separation distance quick and fine adjusting device capable of achieving quick adjustment and fine adjustment of a separation distance between the foot and the thigh in the vertical direction of the shank, and a thigh posture fixing apparatus capable of adjusting rotation of the fixing apparatus according to a foot posture, wherein the lower end of the foot-thigh separation distance quick and fine adjusting device is connected with the foot posture adjusting fixing apparatus, and the upper end of the foot-thigh separation distance quick and fine adjusting device is connected with the thigh posture fixing apparatus. The foot-thigh separation distance quick and fine adjusting device comprises a quick adjusting rod mechanism with the lower end fixed on a foot fixing boot, wherein the upper portion of the quick adjusting rod mechanism is connected with a fine adjusting mechanism, and the upper end of the fine adjusting mechanism is connected with the thigh posture fixing apparatus. The knee-joint operation adjusting and fixing distraction device can meet continuous or temporary fixing and position adjustment under the condition that the knee joint of a patient is at different bending and stretching angles and inward and outward turning angles and any-time quick, fine and accurate adjustment of the foot, shank, knee joint and thigh positions of the patient and angle postures.

The invention relates to a bionic nerve graft used for peripheral nervous recovery and a preparation method and application thereof. The bionic nerve graft comprises a chitosan film conduit and a fibrous protein hydrogel beam positioned in the chitosan film conduit, wherein the fibrous protein hydrogel beam is prepared from fibrous protein through an electrospinning technique. The bionic nerve graft prepared by the preparation method is formed by the filling of the chitosan film conduit and the fibrous protein hydrogel beam of a multi-stage orientation structure, wherein a nerve regrowth space is effectively supported by a chitosan film, the orientational regeneration of a nerve axon is effectively guided by the fibrous protein hydrogel beam of multi-stage orientation, the cell affinity and the mechanical property of whole materials are good, and in addition, degrading speed and the repairing speed of peripheral nervous tissues are matched.

The invention discloses a high-temperature-resistance low-friction weighted clean fracturing fluid which is suitable for high-temperature and high-pressure reservoir reconstruction at 170 DEG C and a preparation method thereof.The fracturing fluid is prepared from, by weight, 0.2%-0.8% of high-temperature-resistance thickening agent, 0.1%-0.8% of system synergist, 0.1%-0.3% of high temperature stabilizer, 0%-42% of weighting agent and the balance fresh water.The high-temperature-resistance low-friction weighted clean fracturing fluid has the following functions and advantages that the weighting agent can be adopted for weighting, and the density is adjustable between 0 and 1.32 g / cm<3>; good temperature-resistance and anti-shearing properties are achieved, and the requirement of high-temperature deep well fracturing construction at 170 DEG C can be met by adjusting a formula; a good resistance reduction property is achieved, pipeline friction resistance can be effectively reduced, and the resistance reduction rate can reach 70%; the fracturing fluid is a fluid with a reversible structure, and the structure damage after high shearing is small; the residue content of the fracturing fluid is decreased to below 10 mg / L, damage to a reservoir and supporting cracks is reduced, the fracturing effect is improved, and the reservoir productivity is increased.

The invention provides a glucan-based transparent hydrogel dressing and a preparation method thereof. The preparation method of the glucan-based transparent hydrogel dressing comprises the following steps: conducting a reaction between a glucan quaternary ammonium salt derivative and succinic anhydride; then promoting an obtained product to react with small molecules of amination, so that a macromonomer which contains illuminated cross-linking double bonds is obtained; mixing the macromonomer which contains illuminated cross-linking double bonds with an antibacterial agent and an initiating agent; conducting photo initiation so as to prepare a glucan-based transparent hydrogel; and combining the glucan-based transparent hydrogel with a polyurethane film by virtue of a bonding agent, so that the glucan-based transparent hydrogel dressing is prepared. The finished product (the glucan-based transparent hydrogel dressing) prepared by the invention not only can absorb a great amount of wound exudates so as to keep a wound surface wet, but also can avoid wound adhesion, so that the probability of wound infection is reduced and wound surface healing is promoted.

The invention relates to a thermo-sensitive and long-acting antibacterial arginine-group hydrogel dressing and a preparation method thereof. Antibacterial drugs are distributed on the surface of and inside hydrogel. The preparation method comprises steps as follows: L-arginine and sodium bicarbonate are dissolved in distilled water, methacrylic anhydride is dropwise added at 0 DEG C, the mixture is stirred, the pH of the solution is adjusted to be 7.4, the solution is filtered and washed, and a modified arginine monomer (M-Arg) is acquired; two antibacterial drugs, namely, A and B, are combined with an N-isopropylacrylamide monomer and a modified arginine monomer with chemical grafting and drug preloading methods, thermo-sensitive and long-acting antibacterial arginine-group hydrogel is obtained and combined with a matrix, and the thermo-sensitive and long-acting antibacterial arginine-group hydrogel dressing is obtained. Raw materials have good biocompatibility, and the obtained hydrogel dressing has thermosensitivity, can resist bacteria and protein absorption, has a long-acting antibacterial function and is suitable for wound protection and treatment of burns, scalds and traumatic injuries.

The invention discloses a sliding positioning guide device which comprises an arc-shaped fixing arm including an arc-shaped chute, an arc-shaped sliding arm matched with the arc-shaped chute, a positioning puncture needle matched with a positioning needle and a skeleton fixing part installed in a drill bit sleeve. The starting end of the arc-shaped fixing arm is provided with the drill bit sleeve radially extending along the arc-shaped fixing arm, and the drill bit sleeve is provided with a fixing screw for fixing the drill bit sleeve. The tail end of the fixing arm is provided with a fixing screw for fixing the sliding arm in the arc-shaped chute, the tail end of the sliding arm is provided with the positioning needle radially extending along the arc-shaped sliding arm, and the positioning needle is provided with a fixing screw for fixing the positioning needle. The arc-shaped fixing arm and the arc-shaped sliding arm are con-cyclic, the skeleton fixing part and the positioning needle are located on the same horizontal plane, and the skeleton fixing part installing the drill bit sleeve and the positioning needle encounter at the center of the circle. The sliding positioning guide device is simple in structure, convenient to operate and capable of accurately and rapidly enabling a drill bit or a guide needle to penetrate an appropriate position, reduces secondary operation injury on local soft tissues, shortens the operation time, reduces bleeding, reduces complications of postoperative patients and shortens the hospital stays.

The invention discloses an improved fertilizer for saline and alkaline land and a preparation method of the improved fertilizer. The improved fertilizer for the saline and alkaline land is prepared from the following raw materials in parts by weight: 25-28 parts of maleic anhydride, 15-20 parts of citric acid, 20-30 parts of calcium superphosphate, 10-12 parts of a sodium ion adsorbent, 2-4 parts of a microbial agent, 25-32 parts of fulvic acid, 15-20 parts of a trace element fertilizer, 30-38 parts of a chicken manure fermentation fertilizer, 20-35 parts of peat, 3-5 parts of perlite, 5-8 parts of vermiculite and 20-25 parts of smashed straw particles. The invention further provides the preparation method of the improved fertilizer for the saline and alkaline land. According to the improved fertilizer for the saline and alkaline land, various soil improving measures can be synthesized, effects of reducing salt and alkali for the saline and alkaline land are good, the water content of the soil is high, the water retention property and the fertilizer retention property of the soil are good, besides, the survival rate of planted plants is high, and virtuous cycle of the soil of the saline and alkaline land is realized.

The invention provides an additive for balancing the gastrointestinal health of animals, which is prepared by absorbing 3 to 15 percent of tributyrin, 21.5 to 52.5 percent of lactic acid and 3.5 to 7.5 percent of formic acid with special carrier white black carbon by grade and layer respectively and then combining the mixture with 1 to 10 percent of glutamine. The additive has the effects of controlling diarrhea and accelerating restoration of injured intestinal tract, and starting from a philosophy of balancing the relationship between the gastropore and the intestinal tract, saving resources, reducing environment loads and improving quality of livestock products, a comprehensive gastrointestinal health management scheme is provided.

A historic building clay sculpture protecting and repairing method comprises the steps of recording original shapes of clay sculptures at first, building a ceiling, using filtered tap water or distilled water, toothpaste and toothbrushes to clean away dirt on the surfaces of the clay sculptures, removing air-slake crisp alkali layers of the clay sculptures, carrying out salt elimination on the clay sculptures, grouting tung oil mortar into slits, cavities and holes of the gray sculptures to repair the clay sculptures, using paper strip mixed lime mortar to repair the damaged and incomplete portions of the clay sculptures or rebuilding the clay sculptures according to the recorded original shapes of pictures of the clay sculptures, using natural pigments and lime paste to manufacture color lime paste according to the recorded color of the original shapes of the clay sculptures, plastering the surfaces of the clay sculptures with the color lime paste, painting the clay sculptures with corresponding natural pigments according to the recorded color of the original shapes of the clay sculptures, painting the whole surfaces of the clay sculptures with tung oil for once to three times to seal and protect the clay sculptures, and establishing scientific clay sculpture repairing files after repairing. The historic building clay sculptures repaired with the method can achieve the obvious effect of being preserved for a long time.

The invention discloses a dual-microphone directional noise inhibition system and method fused with fundamental frequency information. The system comprises a main sound signal input device, an auxiliary sound signal input device, a single-channel voice signal separating module and a dual-channel voice signal separating module. The method comprises the steps that the main sound signal input device collects main voices and inputs the main voices into the single-channel voice signal separating module, and the auxiliary sound signal input device collects background noise signals; and output signals of the single-channel voice signal separating module and the auxiliary sound signal input device are all input into the dual-channel voice signal separating module, and finally processed sound signals are output. According to the invention, a contradiction problem between noise remaining and voice distortion is fully considered, noises can be effectively inhibited on the premise that voices are not distorted, and most non-stationary noises in the real environment can be processed.

The invention relates to a gelled acid for acid fracturing stimulation measures of an oil-gas reservoir. The gelled acid can be applied to cid fracturing stimulation measures of a medium-high temperature carbonate reservoir and has excellent acid-rock reaction retarding property, and filtration reduction property; the flow conductivity of an acid corrosion fracture and the penetration distance of an acid liquid can be effectively improved; deep penetration of the acid liquid can be effectively achieved; a remote reservoir is communicated to reach the target of deep acid fracturing transformation; meanwhile, the gelled acid generates a small amount of residues after acid fracturing; the secondary harm caused by the reservoir is extremely low; meanwhile, the acid liquid system is stable in performance; and field preparation is simple and convenient.

The invention relates to the technical field of medical dressing, in particular to medical and antibacterial cationic biogel dressing and a preparation method thereof. The medical and antibacterial cationic biogel dressing comprises raw materials in percentage by weight as follows: glycerin, chitosan quaternary ammonium salt, amino-acid iodine, organosilicon quaternary ammonium salt, an indigowoad leaf extraction solution, a prunella vulgaris extraction solution, a paniculate swallowwort root extraction solution and the balance of purified water. The antibacterial dressing has a remarkable antibacterial effect, is transparent, high in water content, non-toxic, harmless, nonirritating and good in biocompatibility and adhesion, can isolate bacteria, kill bacteria, fungi and viruses and prevent skin and mucous membranes from infection, can stop bleeding and keep the wound wet and further can promote skin regeneration and healing of the wound. The medical and antibacterial cationic biogel dressing can be widely used for preventing and treating infection of skin wound such as skin bruise, scalding, burning, bedsore, ulcer, vagina skin eczema and the like and local mucous membrane infection of an oral cavity, the throat, gingivae and the like and can relieve pains, inhibit bacteria, protect wound, promote wound healing and inhibit scarring.

The invention provides a polymer viscous acid. The polymer viscous acid comprises acid, a hydrophobic associative polymer thickener, a corrosion inhibitor and an iron ion stabilizer. According to the invention, the hydrophobic associative polymer thickener is adopted as a thickening agent of the viscous acid. Hydrophobic groups of the polymer are associated together in the acid liquid, such that a huge space network structure is formed in the solution, and solution thickening property is improved. The diffusion speed of hydrogen ions in the acid liquid to cracks and gaps is reduced. Also, a formed associated network structure assists in effectively limiting the activity of hydrogen ions. Therefore, acid liquid consumption rate is greatly reduced, effective action distance is increased, acid rock reaction is retarded, crack width is increased, and stratum permeability is improved. The association of hydrophobic groups also assists in improving the temperature resistance and salt resistance of the solution. The formed associative polymer has lower hydrogen ion mass transfer coefficient under high temperature and better high-temperature resistance. The prepared viscous acid has the characteristics of low filtration loss, low friction resistance and high fine sand suspension capacity, such that secondary stratum damage can be retarded.

The invention discloses a fan device and a breathing machine with the same. The fan device comprises a shell, a fan vibration source and a buffer assembly, wherein the fan vibration source is arranged in the shell, the buffer assembly is used for enabling the fan vibration source to be connected with the shell, and the buffer assembly comprises at least two of a positioning buffer component connected with the top of the fan vibration source, a connecting buffer component which at least partly contains the fan vibration source, and a supporting buffer component which is connected with the bottom of the fan vibration source. The fan device can effectively buffer vibration of a fan and reduce and lower noise transmission and is simple in structure.