97results about How to "Easy to maintain stability" patented technology

The invention relates to a device and method for testing bonding shearing strength of a structural adhesive interface. The device comprises a bonding base material testing piece and two bonded testing pieces, wherein the bonding base material testing piece and the two bonded testing pieces are bonded in a crisscross manner by using a structural adhesive, the two bonded testing pieces are mutually parallel and are located at two sides of the bonding base material testing piece, the respective centers of the two bonded testing pieces and the bonding base material testing piece are located on the same straight line, a compression load is applied to the bonding base material testing piece to ensure that shear stress can be generated on a bonding interface of two materials, and the bonding shearing strength of the interface is calculated through the shear stress generated during damaging. The device and the method for testing the bonding shearing strength of the structural adhesive interface are suitable for testing the bonding shearing strength of the interface among different materials with certain bonding layer thicknesses, and especially suitable for evaluating the bonding strength of the structural adhesive between glass of a curtain for doors and windows of a building and a metal base material.

The invention discloses a making method of rosmarinic acid, which comprises the following steps: immersing the medicinal material with rosmarinic acid in the fitful quantity of solvent; permeating; extracting through ultrasound; adding anti-oxidant in the extract; adjusting pH value to acid; stewing; filtering; chromatographing the filtrate in the polyamide resin or ion exchange resin or large-hole resin column; fitting for large scale of industrial manufacturing.

The invention discloses a liquid crystal display panel and a manufacturing method of an opposite base plate. The liquid crystal display panel comprises a thin film transistor array base plate with a colorful filter layer, the opposite base plate and a liquid crystal layer. The opposite base plate is provided with a common electrode, a plurality of main gap objects arranged on the common electrode, a plurality of gap object seats which are arranged on the common electrode and bulge toward the thin film transistor array base plate with the colorful filter layer, and a plurality of sub gap objects arranged on the common electrode. The main gap objects are arranged on the gap object seats for maintaining gaps between the thin film transistor array base plate with the colorful filter layer and the opposite base plate. The liquid crystal layer is also arranged between the thin film transistor array base plate with the colorful filter layer and the opposite base plate. Due to the main gap objects and the sub gap objects, the liquid crystal display panel of the invention forms a liquid crystal display panel with mixed type gap objects.

The invention relates to a smoking device with a heat storage component. The smoking device is characterized by comprising a shell (1) and the heat storage component (2) arranged inside the shell (1). The heat storage component (2) comprises a heat storage material container (5) and a heat conducting element (7). One or more tobacco containing cavities (10) are defined by the heat storage material container (5) or defined by the heat storage material container (5) and external components jointly. Heat storage materials are placed into the heat storage material container (5). The heat conducting element (7) comprises a first heat conducting section (7a) and a second heat conducting section (7b), wherein the first heat conducting section (7a) is contained in the heat storage material container (5), and the second heat conducting section (7b) extends out of the heat storage material container (5). The smoking device and an external heat supply device can be connected in a pluggable mode to form a smoking system, heat storage and emission are achieved through phage change materials, and tobaccos are heated in the heat emission process. In this way, the smoking device can be provided with no battery or a small battery, the size of the smoking device is more approximate to a traditional spark ignition type cigarette, and the smoking device is convenient to use.

The invention discloses a modified AKTA pure chromatographic apparatus. On the basis of the structure of original standard AKTA pure, three multifunctional valves, as well as a second column position valve or a Loop ring valve, are added, so that two flow paths, which work simultaneously, are formed by three columns; one flow path is used for continuously loading a sample, while the other one flow path is used for pretreatment before and post-treatment after sample loading, so that continuous purification of a perfusion culture material solution is achieved. The modified apparatus can achieve low-cost, multi-cycle and automated purification of fed-batch culture solutions, avoids accumulation and degradation of the sample, can maintain the stability of the sample, is free of an extra large-volume buffer container, and is high in purification efficiency.

The invention discloses a continuous alkali washing method of C5 petroleum resin. In the alkali washing process, feeding and discharging processes are continuously carried out, which is beneficial to keeping the stability of product quality, effectively prevents phenomena of emulsification, resin material liquid entrained in discharged water and the like, reduces corrosion on equipment and saves cost, thus the method disclosed by the invention is an efficient, saving and less-pollution continuous alkali washing method.

The invention provides a polishing solution for electrochemical polishing of a nickel-titanium alloy, and belongs to the field of nickel-titanium alloy surface treatment. The polishing solution is composed of the following matter of, by volume, 22%-43% of concentrated sulfuric acid, 37%-50% of ethylene glycol, 5%-10% of an additive agent and the balance water. The invention further discloses a method for electrochemical polishing of the nickel-titanium alloy, the nickel-titanium alloy is treated as the anode, a stainless steel plate is treated as the cathode, the anode and the cathode are placed into the electrical polishing solution, and electrochemical polishing is conducted. The electrochemical polishing solution and the polishing method can be used for polishing a medical nickel-titanium alloy, the nickel-titanium alloy which is subjected to polishing treatment is good in corrosion resistance. The formula of the nickel-titanium alloy electrochemical polishing solution is not proneto volatilizing, stable and environmentally friendly, low in cost and good in operating environment.

The invention discloses a collimation body and a treatment body and belongs to the field of medical devices. The collimation body comprises a base body and a shielding body. A first collimation hole is arranged in the base body. The shielding body is arranged at the outlet of the first collimation hole. A second collimation hole which coaxially communicates with the first collimation hole is arranged in the shielding body. The shielding body is made of shielding materials used for blocking radiation beams. The base body is made of materials whose intensity is smaller than the intensity of the materials of the shielding body. In this way, on one hand, the weight of the collimation body is reduce, the processing is facilitate, and the production cost is reduced, so in a rotation process of a treatment rack, it is quite easy to keep the balance ability and stability of the treatment head and adjust the relative position of the treatment head and a radiation source. On the other hand, the dosage characteristics of the shooting field of the collimation body are improved, the half image of the shooting field and leaked shooting are reduced, other normal tissues are protected against damage and treatment effects of target cancers are improved.

The invention discloses a recombinant plasmid capable of expressing a soluble human papilloma virus 16 subtype L1 protein and an expression method thereof. The recombinant plasmid is constructed by inserting a human papilloma virus 16 subtype L1 gene and an SUMO label gene into an expression plasmid. According to the recombinant plasmid disclosed by the invention, the HPV16 L1 gene is optimized, so that the HPV16 L1 gene is more applicable to efficient expression of a target protein in an escherichia coli host; meanwhile, an Sumo label expression system is initially applied to fusion expression in escherichia coli, and the solubility of the target protein is further enhanced, so that the expressed target protein has higher activity. The expression method disclosed by the invention has the advantages that the target protein solubility expression efficiency is obviously improved, the product property is uniform and stable, the target protein expression quantity in a supernatant of a fermented disrupted bacterium liquid can reach 70Mug / ml, and the numerical value is obviously higher than yields of the target protein in other prokaryotic expression systems, so that the industrial production requirement is met.

The invention discloses an external wall thermal insulation coating as well as a preparation method and application thereof, and belongs to the field of external wall coatings. The external wall thermal insulation coating comprises the following components by weight: 15-30 parts of water; 0.2-0.5 parts of hydroxyethyl cellulose; 1-1.5 parts of ethylene glycol; 30-40 parts of inorganic resin; 8-15parts of an acrylic emulsion; 0.3-0.5 parts of lauryl sodium sulfate; 3-6 parts of an inorganic water repellent; 6-15 parts of pigment and filler; 23-38 parts of a thermal insulation filler; and 0.1-0.2 parts of a multifunctional auxiliary agent. The coating disclosed by the invention can be directly applied to a cement mortar wall reinforced by seal primer, and has the advantages of good thermalinsulation property, high fireproof grade, good hydrophobicity and good comprehensive performance.

The invention relates to a double-femtosecond optical frequency comb generation device belonging to the technical field of femtosecond laser. The device is provided with an annular resonant cavity structure consisting of an optical fiber and a spatial light path and comprises a pumping source, a wavelength division multiplexer, piezoelectric ceramic, an er-doped fiber, a single mode fiber, a firstoptical fiber collimating mirror, a second optical fiber collimating mirror, a spatial optical path element first 1 / 4 wave plate, a first 1 / 2 wave plate, a polarization beam splitter, an opto-isolator, a second 1 / 2 wave plate, a second 1 / 4 wave plate as well as a grating pair, wherein the grating pair consists of a first grating and a second grating and is arranged between the polarization beam splitter and the opto-isolator. According to the device, an optical path difference is introduced through the grating pair, so that double-femtosecond optical frequency combs with repeated frequency differences are generated, and the repeated frequency differences can be adjusted according to the distance between the grating pair. The device provided by the invention is low in cost, small in size,simple and compact in structure, convenient to operate and wide in engineering application prospect.

The invention relates to a test method for simulating sunlight focusing-induced scorching. The test method is used for a whole lamp assembly with a lens. The test method is characterized by comprising the following steps that: (a) a test device is provided; (b) a whole lamp assembly to be tested is fixed on a test rotary table according to a loading direction, under a condition that the rotation angle of the test rotary table is fixed, a parallel light source moves in a range of 0-90 degrees relative to the whole lamp assembly to be tested along an arc-shaped rail, an area scanned by a light spot on a mask is a light spot scanning area, and the whole mask is divided into a plurality of scanning areas according to different rotation angles of the test rotary table; and (C) the rotation angle of the test rotary table is adjusted, the light spot scanning areas are scanned from one end to the other end of the whole lamp assembly to be tested. Compared with the prior art, the method is ingenious in design, can accurately control focusing time in a test process, simulate actual solar moving orbits, obtain accurate focusing positions and angles, and keep the stability of irradiation energy more easily.

The invention discloses an immersion phase change liquid cooling system of a laser. The system comprises a laser knife box and a condenser, a refrigerant steam outlet is formed in the top of the laserknife box, a liquid refrigerant is arranged in the laser knife box, at least one set of laser modules are arranged in the laser knife box, the heating faces of the laser modules are immersed in the liquid refrigerant, the liquid refrigerant absorbs heat generated by the laser modules and then is converted into gas from liquid, and the gas refrigerant flows out of the laser knife box through the refrigerant steam outlet. The input end of the condenser is connected to the refrigerant steam outlet, the output end of the condenser is connected to the refrigerant liquid inlet of the laser knife box, the condenser is used for conducting heat exchange on gaseous refrigerants so that the gaseous refrigerants can be converted into liquid refrigerants through phase change, and the liquid refrigerants enter the laser knife box through the refrigerant liquid inlet. By means of the technical scheme, the heat dissipation efficiency of the laser can be improved, it is guaranteed that the laser operates in a constant-temperature environment, and the problems of miniaturization and light weight of a laser heat dissipation system are solved.

The invention relates to the field of sanitation vehicles, in particular to a power driving system of a pure electric compression type garbage truck. The power driving system mainly refers to a travelling power system and comprises a power battery, a driving motor and a central motor driving axle. A power battery pack is arranged between longitudinal beams, the driving motor is mounted on the central motor driving axle and arranged at the rear end of a truck frame, and the central motor driving axle is a key component of the travelling power system and is also a key component for being distinguished from a traditional speed-changing driving system. The pure electric compression type garbage truck is driven by the driving motor during operation and transition. Through the parallel axis typedirect driving scheme, chassis layout is simpler and tidier, the transmission efficiency is high, the weight is reduced, and the good dynamic property and economical efficiency can be achieved; and the garbage truck mostly works in the wee hours and is charged at night, thus a quite good 'peak load shifting' effect is achieved on a grid system, the stability of the grid system is advantageously maintained, and the using cost is reduced.

The invention discloses a papaya anti-oxidant serum, which comprises cyclodextrin inclusion compound of pawpaw natural antioxidant and carriers accepted in pharmacy. The papaya anti-oxidant serum consists of enzymolysis water extract and alcohol extract of the papaya, in which vitamin C and polyphenols are contained. Vitamin C contained in papaya anti-oxidant serum is no less than 2 milligram per gram, and the total polyphenols calculated in gallic acid is no less than 22 milligram. Therefore, the papaya anti-oxidant serum has the characteristics of high efficiency, durability and stable inoxidizability and easy storage and carrying, can be served as health food to eat, can used as cosmetics, animal food, food or medical mediate, and further can used for preparing antioxidation products; the invention also discloses a preparation method for the papaya anti-oxidant serum, which comprises seven steps of pulping, enzyme digestion, filtering, alcohol extraction, concentration, inclusion and pelletization, so as to be a system for efficiently, sufficiently and completely extracting papaya anti-oxidant, and the antioxidative activity can be effectively preserved.

The invention relates to a device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and a method thereof and belongs to the field of river-channel pollution treatment in environmental protection. The device comprises an electrolysis device, a biological fuel cell and a galvanometer, wherein the electrolysis device comprises a cathode area, a bottom-sediment area and an anode area; the negative electrode of the biological fuel cell is arranged at the outer side of a round drum, the positive electrode of the biological fuel cell is arranged at the inner side of the round drum, and a compost layer is arranged between the negative electrode and the positive electrode; a cathode rod is arranged in the cathode area, the top part of the cathode rod is electrically connected with the positive electrode, the negative electrode is connected with one end of the galvanometer, and the other end of the galvanometer is electrically connected with a positive rod; a substance exchange film is arranged between the anode area and the bottom-sediment area, a substance exchange film is also arranged between the bottom-sediment area and the cathode area, the top part of a cathode sampling area is provided with a cathode sampling port, the top part of a middle sampling area is provided with a middle sampling port, and the top part of an anode sampling area is provided with an anode sampling port. The device and the method have the advantages that the energy is saved and simultaneously the purpose of using wastes to treat wastes is achieved.

The invention belongs to the field of pharmaceutical preparations, and relates to a phloroglucinol injection and a preparation method thereof. The phloroglucinol injection comprises the following mainactive pharmaceutical ingredients: phloroglucinol, trimethylphloroglucinol, an osmotic pressure regulator sodium chloride and water for injection. The preparation method is mainly characterized in that carbon dioxide is used as a stabilizer, so that the use of an antioxidant is avoided, the pH value of the solution is reduced, the stability of the solution is improved, the prescription process issimplified, and the phloroglucinol injection with stable content, slow impurity growth and long validity period is obtained.

The domain negotiation method for P2P QoS comprises: configuring the net element accessed network and connected to outside network directly for data transmission to let it have function for QoS negotiation as the RNIP; then, when one piece of business in domain need external resource guarantee and the external network manages the local resource by a controller, the RNIP obtains necessary information for negotiation and selects addressing information of external resource controller to pack into a resource request information to send to the controller and receive response information. This invention combines advantages of OFF-PATH and ON-PATH mode.

The invention relates to the technical field of military radar, more specifically to a wind-resistant stabilizing device for a radar antenna array. One end of a steel wire rope is connected to a winch, and the other end of the steel wire rope is connected to the top end of the antenna array. Two ends of a ball screw are respectively provided with a support and a bearing, a slotted nut is arranged on the ball screw, a ball nut and a floating plate are both sleeved on the ball screw, and a disc spring is sleeved on the ball screw, the ball nut and the floating plate. A left drum cover is arranged at the left bearing, a right drum cover is arranged at the right bearing, and the left drum cover is fixedly connected to the right drum cover. A fixed stop is fixedly connected to the right drum cover. Two side sealing plates are respectively fixedly connected to the left drum cover and the right drum cover. The radar antenna array is obliquely pulled by the steel wire rope, so that the wind load is effectively resisted, the wind resistance is improved, stability is guaranteed, and the device is simple in structure and low in cost.

The invention discloses a collision type connecting and disconnecting mechanism for a mine car, comprising a first fixed plate, hooks and a second fixed plate, wherein a first fixture block is fixed at the left end of the first fixed plate, second fixture blocks are connected to the upper end and the lower end of the first fixture block, the hooks are arranged at the left end of the second fixtureblock, slide beads are connected to the outsides of the hooks, and the second fixed plate is arranged at the left end of a damping spring. According to the collision type connecting and disconnectingmechanism for a mine car, two second fixture blocks are arranged on a bottom plate, the two fixture blocks are arranged in up-down symmetry, a clearance is formed between the two fixture blocks, while the first fixture block is arranged on the first fixed plate, the bottom plate and the first fixed plate are fixed on two different mine cars, and when opposite collision occurs to the two mine cars, the first fixture block is clamped between the two second fixture blocks to complete fixing; and compared with conventional chain hooking, the collision type connecting and disconnecting mechanism is simple in operation, relatively low in labor intensity, and favorable for alleviating the load of workers.

A medical care transfer bed belongs to the field of medical devices, and includes an upper bed plate, a lower bed plate and support legs support on that lower surface of the lower bed plate, The upperbed plate comprises a head rest plate, a back cushion plate, a buttock cushion plate and a leg cushion plate corresponding to the head, the back, the buttock and the lower leg parts of the human bodyrespectively. Accordingly, the lower bed plate comprises a head fastening plate, a back fastening plate, a buttock fastening plate and a leg fastening plate. A driving mechanism for pushing and pulling the corresponding upper bed plate is arranged on each plate of the lower bed plate. A support leg is arranged on that lower surface of the buttock fasten plate and the back fastening plate, each plate of the upper bed plate is not connected with each other, and each plate of the lower bed plate is connected with each other mainly through a rotary connecting piece. A low surface of that buttockfixing plate is connected with a rotating lever driven by a stepping motor, the free end of the rotating lever is connected with an arc-shaped connecting rod, and the two ends of the arc-shaped connecting rod are respectively hinged on the lower surface of the back fixing plate and the leg fixing plate. The medical care transfer bed can transfer the patient between the hospital bed and the transfer bed conveniently, the movement and walking are more flexible, the shape can be changed, and the practical value can be improved.

The invention belongs to the technical field of agricultural planting and in particular relates to a seed blending method for improving the sweetness of muskmelons. According to the seed blending method, muskmelon seeds are pre-treated and physiological metabolism processes of the seeds, especially substance metabolism and related enzyme activity of cell walls, are effectively regulated so as to improve the physiological metabolism capability of the seeds; the integrity and stability of a cell wall structure are easy to maintain and stable calcium concentration of cytoplasm is maintained; the degradation of components including pectin and cellulose of the cell walls is inhibited and the life vigor of the seeds is enhanced; sound seedlings are cultivated, the metabolism of muskmelon plants is accelerated and the synthesis of sugar is facilitated; then seed blending treatment is carried out so that the growth and development of the muskmelon plants can be effectively stimulated, the development of roots is facilitated and thick and big main stems are obtained; the absorption on soil nutrients by roots and stems is stimulated and ageing of the plants is inhibited; the absorption on nutrient elements is facilitated and a soil structure is improved; the drought-resisting capability of the muskmelon plants is improved and the synthesis of nutrient substances is facilitated so that the sugar content reaches 20.18 percent or more and the sweetness and yield of the muskmelons are effectively improved.

The invention discloses a high temperature blast hole temperature measuring device and a high temperature blast hole temperature measuring method. The device comprises an infrared temperature sensor, a cable, an air purge device, a heat-resisting pipe, an air pump, a display instrument and a weight. One end of the heat-resisting pipe is connected to the air pump and the other end is connected to the air purge device. The infrared temperature sensor is fixed in the air purge device. An infrared emission port position of the infrared temperature sensor corresponds to a purge port position of the air purge device. One end of the cable is connected to the display instrument and the other end passes through the heat-resisting pipe and then is connected to the infrared temperature sensor. The weight is fixed below the air purge device. In the invention, the infrared temperature sensor is used to increase temperature measurement response time; hole wall temperatures with different depths of a blast hole can be rapidly scanned and measured; through the air pump, air is continuously filled in the heat-resisting pipe so as to cool the cable and the infrared temperature sensor; and through the air purge device, dust or water vapor in the blast hole can be blown away and then the hole wall temperatures of the blast hole can be measured.

The invention discloses a line fault processing method, system and device in a low-frequency power transmission system and a medium, and the method comprises the steps: determining that a fault occurs in a first phase line in a low-frequency line, and cutting off the first phase line; adjusting a second phase line and a third phase line in the low-frequency line to be in an orthogonal two-phase power transmission mode, so that an active power frequency doubling fluctuation component is avoided; wherein the low-frequency power transmission system comprises a power frequency main network and a low-frequency line, the low-frequency line is connected with the power frequency main network through an MMMC converter station, and the MMMC converter station comprises a modular multi-level matrix converter and a converter transformer. According to the invention, when a line in the low-frequency line fails, an original three-phase power transmission mode is converted into a two-phase power transmission mode, so that loss of transmission power is avoided; in addition, the phase of a sound two-phase line is adjusted, an orthogonal two-phase power transmission mode is entered, the introduction of a frequency doubling fluctuation component is avoided, and the system stability can be maintained. The method and the system can be widely applied to the technical field of AC / AC converters.

The invention relates to the field of ecological slope protection, and particularly relates to a slope protection structure for preventing water and soil loss. According to the technical scheme, the slope protection structure for preventing water and soil loss comprises a reinforcing layer laid on a side slope, a base table arranged at the bottom of the side slope and a plurality of protection pieces arranged in the length direction of the side slope; the reinforcing layer comprises a planting layer arranged on the side slope and a protection layer arranged on the planting layer; the protection layer comprises a plurality of slope protection bricks and fixing pieces used for fixing the slope protection bricks; and planting holes used for vegetation growth are formed in the slope protection bricks. The slope protection structure has the effects of improving the water and soil conservation efficiency, reducing water and soil loss and improving the protection effect of the slope protection.

The invention discloses a mobile solar aerating system for treating a river course. The mobile solar aerating system comprises a floating body, a solar cell panel, an air blower, a submersible flow push propeller and an aerating device, wherein the solar cell panel is arranged on the upper surface of the floating body; the air blower is internally arranged in the floating body; the submersible flow push propeller is mounted at the bottom of the floating body; the floating body is of a closed structure; the solar cell panel is connected with the air blower and the submersible flow push propeller respectively; an inlet of the air blower is communicated with outside air; an outlet of the air blower is communicated with the aerating device; the aerating device comprises a main aerating pipe; the main aerating pipe is communicated with multiple vertical aerating branch pipes; the aerating branch pipes are provided with multiple aerating holes along length directions; the aerating system also comprises a visual detector. The mobile solar aerating system has beneficial effects that the solar cell panel is put on the floating body below a colorless transparent plate; other apparatuses arearranged in the interior of the floating body; the corrosion, to each structure, of an acid and the like in rainwater is relieved by such a structural arrangement; usage times of the apparatuses are furthest prolonged; the visual detector can be used for regulating the submersible flow push propeller according to a detection result to turn a direction; the manual operation is not needed, and the automatic control of the system is realized.

The invention relates to the technical field of environment restoration, in particular to a coastline ecological restoration structure and method, and the coastline ecological restoration structure comprises a floating plate, hemp ropes, a floating frame, a perforated plate, a solar battery pack and the like; three pairs of hemp ropes are arranged on the floating plate, floating frames are symmetrically and fixedly connected to the upper portion of the floating plate, a perforated plate is jointly and fixedly connected between the lower portions of the two floating frames, and a solar battery pack is jointly and fixedly connected between the upper portions of the two floating frames. Through the cooperation of the painting guide plate and the devices on the painting guide plate, a small amount of algae can be blocked, so that a small amount of algae existing on the coastline cannot be cleaned, the ecological stability of the coastline is favorably maintained, when a large amount of algae on the coastline propagates, the painting guide plate does not block the large amount of algae any more, and the collection net can collect and clean the large amount of algae; and the effects that a large amount of algae can be cleaned, and a small amount of algae can be reserved to perform ecological restoration on the coastline are achieved.

The invention disclosed a method for preparing supported palladium catalyst electrode on the basis of graphene-doped Nafion film modification and belongs to the technical field of electrochemical water treatment. Graphene is dispersed in a Nafion isopropanol solution in an ultrasonic mode, ultrasonic dispersion is conducted to prepare evenly dispersed Graphene-Nafion dispersion liquid, the dispersion liquid is evenly dropped on a titanium screen and naturally dried, and a Graphene-Nafion / Ti electrode is obtained; the Graphene-Nafion / Ti electrode serves as a negative electrode, a platinum sheet serves as a positive electrode, a palladium chloride (PdCl2) solution serves as electrolyte, and the supported palladium catalyst electrode Pd / Graphene-Nafion / Ti on the basis of graphene-doped Nafion film modification is prepared through electro-deposition. Compared with a Pd / Ti electrode prepared without being modified by graphene, the electrode prepared through the method has higher catalytic activity.

The invention provides a preparation method of rosmarinic acid. The method is to impregnate the medicinal material containing rosmarinic acid with an appropriate amount of solvent, percolate or ultrasonically extract, add an antioxidant to the extract or adjust the pH to be acidic, place it, and filter , polyamide resin or ion exchange resin or macroporous resin column chromatography on the filtrate. This method is very suitable for industrialized mass production.

The invention discloses a lifting iron loss-of-force sprain prevention protection device for fitness, which comprises a supporting assembly, a big arm fixing assembly and a forearm fixing assembly, the supporting assembly is located on the outermost side of the whole device, the big arm fixing assembly is arranged on one side of the supporting assembly, and the forearm fixing assembly is arrangedat one end of the big arm fixing assembly. The device can effectively avoid the phenomenon that in the fitness dumbbell lifting process, when the arms of fitness personnel are in a force loss state, an emergency stop assembly is used for rapidly making an emergency stop response, and stopping the lower hem of the arms and avoiding the phenomenon that the arms are strained, the device can reduce the impact force generated when the lower hem of the arms is stopped suddenly, and the effect of reducing arm injuries caused by impact is achieved. According to the device, the stabilizing effect of the emergency stop assembly is enhanced through the transverse resistance generated when a buffering protruding block moves along the track of a buffering spiral groove channel, a buffering spring cannot deform rapidly after being pulled, the stability of the emergency stop effect of the device can be maintained conveniently, and damage caused by rapid downward swinging of the arm is prevented.