50 results about "Engineering principles" patented technology

The invention discloses a normal brake system used for an airplane and having take-off line brake capability. The normal brake system comprises a hydraulic brake valve, an electric valve, an electro-hydraulic servo valve, an anti-slip control box, a hydraulic switch and a speed sensor, wherein the hydraulic brake valve is mounted near a pedal mechanism under a bottom plate of a cockpit, controlled by operation of stepping on a brake pedal by a pilot and used for outputting a required brake pressure; the electric valve is mounted on a hydraulic pipeline at the downstream part of the hydraulic brake valve; the electro-hydraulic servo valve is mounted on a hydraulic pipeline at the downstream part of the electric valve; the anti-slip control box is mounted in a main landing gear cabin and powered by a power supply on the airplane; the hydraulic switch is mounted on a hydraulic pipeline between the hydraulic brake valve and a first oil inlet of the electric valve. The normal brake system can meet a braking demand of an existing normal brake system of the airplane on a take-off line, is reasonable in structure, simple, convenient, feasible, consistent with a man-machine engineering principle and favorable for reducing the burden of the pilot, and eliminates accident potentials caused by false operation of switching on a take-off line brake switch.

The invention relates to a remote intelligent testing method of a three-dimensional human body image data network. The method comprises the following steps that: a user acquires a body form picture of a target human body by the camera function of a mobile phone, internet terminal camera or digital camera; the user determines information on a tested part of the human body by human-machine interaction; the user sends the information on the tested part of the human body and height data of the tested human body to a data processing center through a digital network; the data processing center calculates body form data of a human body image by comprehensively using a human body engineering principle and statistic data; the calculated body form data are converted into Chinese and foreign costume size information matched with the body form data of the target human body; and the results of the steps are encrypted and sent to the mobile phone or a network terminal. The method has non-contact, intelligent, multifunctional and networked characteristics. The method can measure a user or others at the same time, can obtain the matched Chinese and foreign costume size information according to the human body test results, and can be applied to industries, such as garment customization, electronic commerce and the like.

The invention discloses a battery device of electronic cigarette. The battery device comprises a housing (1), a battery (2) which is installed inside the inner cavity of the housing (1) and a push-button component (20) which is rotatably mounted on the housing (1). The push-button component(20) comprises a switch button (2) and at least one elastic element (6). Each of the elastic elements (6) is respectively pushed against the switch button (2) and the housing (1). The invention also discloses an electronic cigarette with the battery device. By using lever principle, fatigue of users caused by pressing push button is reduced, and thus the technological content of the electronic cigarettes is improved, and the demand of users is met. The battery device of electronic cigarettes matches the human body engineering principle.

An airplane hydraulic brake system comprises a hydraulic brake valve, a liquid-controlled conversion valve, an electro-hydraulic servo valve, an anti-slide control box and a speed sensor. The liquid-controlled conversion valve is mounted on a downstream hydraulic pipeline of the hydraulic brake valve, the electro-hydraulic servo valve is mounted on a downstream hydraulic pipeline of the liquid-controlled conversion valve, an electrical interface of the electro-hydraulic servo valve is electrically connected with the anti-slide control box through a shielding insulation wire, an oil inlet of the electro-hydraulic servo valve is in pipeline connection with an oil outlet of the liquid-controlled conversion valve, a brake opening of the electro-hydraulic servo valve is in pipeline connection with an oil inlet of a brake device of a brake airplane wheel, and an oil returning opening of the electro-hydraulic servo valve is in pipeline connection with an airplane oil returning pipeline through a hydraulic filler neck and a guide pipe. The airplane hydraulic brake system can meet the ever-growing airplane take-off line brake requirement, is reasonable in structure, easy and convenient to implement, and beneficial for reducing of burdens of a driver, conforms to the man-machine engineering principle and meanwhile the accident potentials caused by false-operation switching on of a take-off line brake switch are eliminated.

The invention discloses a bionic low-vibration walking wheel. The bionic low-vibration walking wheel comprises a first wheel leg mechanism and a second wheel leg mechanism, the first wheel leg mechanism is fixedly arranged on the second wheel leg mechanism through a plurality of connection bolts, and the first wheel leg mechanism and the second wheel leg mechanism are structurally identical. The bionic low-vibration walking wheel is designed on the basis of bionic engineering principles, the synergic foot movement of an ostrich and the energy absorption and vibration attenuation characteristics of the metatarsophalangeal joint tendons of the ostrich. When the walking wheel travels on the sandy ground and hard ground, wheel center fluctuation and vibration are evidently weakened while a traction performance of a normal walking wheel is achieved. The bionic low-vibration walking wheel is simple in structure, stable in operation, excellent in sinking resistance, low in soil disturbance according to the wheelmark and superior to a traditional walking wheel in traction performance. In addition, the bionic low-vibration walking wheel is low in wheel center fluctuation, the vibration attenuation effect is more evident along with the increasing of the rotation speed, and accordingly the comfortableness of a driver is improved, vehicular mechanical parts are less prone to fatigue failure, and the bionic low-vibration walking wheel is suitable for extensive popularization and application.

A product accelerated degradation test scheme design method based on engineering experience includes the following steps that constraint conditions of conducting test design are determined, wherein the constraint conditions comprise test time, test sample sizes and test expenses, and the test expenses have a whole restraining relationship with the test time, the test sample sizes and test frequency; prior information of an accelerated degradation test is determined, wherein the prior information is obtained according to the engineering experience, design criteria and similar product information and through finite element analysis and product diagnostic test analysis; a design scope of corresponding test design elements is given according to engineering principles and corresponding calculation empirical formulas, wherein the design scope comprises test stress level numbers, stress levels, the test sample sizes, the test time and the test period of the test; corresponding test design alternative schemes are constructed on the basis of the calculation results, and the accelerated degradation test scheme is determined according to the engineering experience and an implement difficulty level.

A method and apparatus that has the ability to run interactive legacy applications from a network, such as the Internet, without requiring any code changes in the application. Thus, the application is unaware of the new network environment and continues to run, as- is, in its native environment. The legacy application may be accessed from any of several client devices using a network server that can be connected to or integral with the computer on which the application is executing. Typically, these legacy applications are critical to a business, are self-contained on the computer, have mixed business and user interface logic, and were written before software engineering principles of distributed computing emerged. Separating business logic from user interface logic as required by web application architectures is not practicable in the case of legacy applications. A client, such as a thin client, has a network user agent, such as a web browser, which can access a network server connected to the computer. The method of this invention provides an environment such that when an application is invoked from the network user agent, a runtime data redirector intercepts the application's raw data and sends the data to the network server which then serves the data across the network to the network user agent after dynamically updating the associated application's network pages, such as JavaServerPages, which were generated by converting the proprietary display screens of the legacy application. Input data form the user entered through the network user agent are sent back to the application via the same runtime intercept. In this fashion, the client and network environment are transparent to the application while the application is now able to take advantage of many Internet and other network capabilities.

The invention relates to a shrink ratio test stand for testing the performance of a brake material for a railway train. The analysis on the performance of the brake material is the important technical problem of research on all friction materials. The current standard regulates that the performance detection of all the brake materials for the railway and the railway trains can be tested on a 1:1 bench. Currently, few 1:1 railway train inertia braking benches are provided in China, so that the normal product detection is difficult to carry out. In the invention, a novel test bench for testing the performance of the brake material for the railway train, which consists of a driving mechanism, an inertia wheel configuration mechanism and the like, is arranged; a brake engineering principle isclosely combined; and a small sample geometric simulation shrink ratio test mode is used to be consistent with a 1:1 bench test mode. Due to the adoption of the shrink ratio test stand, a result corresponding to test data of the 1:1 bench can be obtained; and the consistency of the testing condition and the using working condition of the shrink ratio test stand in the whole testing process is really reflected. The shrink ratio test stand is convenient to operate and has complete functions and high technology content. The gap of the industry in China is filled. The rapid development of the field of the brake material in the industry is promoted.

The invention relates to a lifting and descending device for an electric energy meter checking device. The lifting and descending device is characterized by comprising a fixed frame (1), wherein a movable plate (2) is arranged in the fixed frame (1); electric energy meters (21) are arranged on the movable plate (2); and a driving mechanism (3) which controls the movable plate (2) to lift and descend vertically is arranged between the fixed frame (1) and the movable plate (2). When an operator needs to assemble or disassemble a certain row of electric energy meters, a hand wheel is rotated to drive a pull wheel to rotate, and a steel wire rope which is embedded in the pull wheel drives the movable plate to move vertically through friction, so the electric energy meters are moved to the most appropriate place by the operator, a positioning bolt is inserted into a positioning strip through hole and used for fixing the movable plate, and the operator can safely, conveniently and effortlessly assemble and disassemble the electric energy meters. The lifting and descending device for the electric energy meter checking device has the advantages that the electric energy meter checking device is in accordance with a man-machine engineering principle; the operator can conveniently and effortlessly assemble and disassemble the electric energy meters; and compared with a fully-automatic lifting and descending device, the lifting and descending device is high in working efficiency, simple in structure and low in cost.

The invention discloses controllable electrophysiologic conduit which comprises a grasp part and a control component slidably mounted in the grasp part, wherein a limit component for limiting the sliding range of the control component is arranged in the grasp part; a conduit body is connected with the control component, and a traction fiber is connected with the grasp component. The controllable electrophysiologic conduit is characterized in that the tail end of the control component is located in the grasp part, and a device for adjusting the diameter of the tail end is arranged at the tail end of the control component. The design of the device accords with the man-machine engineering principle, a palm can hold the grasp part completely, fingers and palms are not prone to fatigue in an operation process, and the operation is smooth during the operation process by a user.

The invention particularly relates to a wall-mounted multifunctional clothes processing machine with the functions of washing, air drying, ironing and the like integrated. The wall-mounted multifunctional clothes processing machine comprises a roller washing machine, wherein the included angle of a roller center shaft and the wall projection of the roller center shaft is 45 degrees to 75 degrees. A shell of the roller washing machine extends upwards to form a machine body, a control panel is arranged on the machine body, and the upper plane of the machine body extends rightwards to form an ironing table. According to the wall-mounted multifunctional clothes processing machine, an oblique roller structure is used, the advantages of a horizontal roller and the advantages of a straight roller are integrated, the water seal requirement is lowered, after the wall-mounted multifunctional clothes processing machine is hung on a wall, the height of a roller is adaptive to the height of the arms of people, people do not need to bend down by a large margin, the oblique roller structure is close to the most energy-saving gesture of the arms of people, the taking convenience of people is greatly improved, fatigue of people is lightened, the roller washing machine accords with a man-machine engineering principle, and applicable people of the washing machine are greatly increased. In addition, the upper plane of the machine body extends rightwards to form the ironing table, people can execute the next link conveniently after washing clothes, and the effective household using space is further saved.

The invention provides an easy quantitative sampling device for inhomogeneous powder, and belongs to the fields of mines and exploration. The device comprises a sampler for clamping the inhomogeneous powder, a first connection rod, a second connection rod, a first extension rod, a second extension rod, a handle open-close rotation support rod, a handle and a spring. Samples are accurately taken, wherein a volume of a cone cylinder is designed according to basic requirements for sampling volume of an iron ore volume weight and grade test sample, quantitative sampling is conducted in each blasthole at one time, and working efficiency is improved. The cone cylinder has a length adaptive to the height of rock debris, and uniform sampling can be conducted along the stacking depth; point sampling of a traditional sampling shovel is changed into column sampling, and the representativeness of a sample is greatly improved; the handle height and operation mode of the sampling device conform to the man-machine engineering principle, workers do not need to continuously bend down to take samples any more, and the acknowledged labor intensity is greatly reduced; the representativeness of the sampled sample is improved so that the use ratio of mining resources can be improved, accurate information is provided for scientific proportioning, and accordingly great economic benefits are brought to the mines.

The invention discloses a multi-dimensional and multi-granularity network space security measurement method. The multi-dimensional and multi-granularity network space security measurement method comprises the following steps: dividing a network system into three hierarchies according to logical hierarchy, wherein the three hierarchies are reliability security, environment security and vulnerability security separately; extracting and selecting indexes in the network system according to the three hierarchies, and establishing a network space security index system by means of the system engineering principle and the analytic hierarchy process (AHP); performing dimensional division on each hierarchy based on the established network space security index system; wherein the reliability securityis measured by a weak connectivity dimension and a strong connectivity dimension, the environment security is measured by a network asset and service dimension and an asset index change dimension, and the vulnerability security is measured by a vulnerability dimension and an attack graph dimension; and adding the granularity on the basis of the hierarchy and dimension, and obtaining the measurement values of each hierarchy and each dimension within the specified range of the granularity, wherein the sum is the network space security measurement result. Using the multi-dimensional and multi-granularity network space security measurement method, the measurement results are more accurate and comprehensive.

An automatic left and right movement control platform for preventing cervical vertebra diseases comprises a base, a vertical transmission portion and a horizontal movement platform. Left and right movement of the horizontal movement platform is freely controlled by a single-chip microcomputer. According to the man-machine engineering principle, the sight line of a computer user moves left and right along with a display by automatically moving the display left and right, a man-machine contact is avoided, the computer user can unconsciously and naturally finish cyclic head movement of 'left head swing and right head swing and left head swing', time is saved, cervical vertebrae can be properly exercised, and the risk of the cervical vertebra diseases is reduced, so that the cervical vertebra diseases are prevented. The automatic left and right movement control platform is scientific in design, proper in size, convenient to use and suitable for crowds using computers for a long time.

The invention relates to a soilstone flocculant. The soilstone flocculant comprises the following components in percentage by mass: 5-15% of attapulgite, 5-12% of sepiolite, 3-48% of flyash, 5-37% of red mud, 2-30% of metallurgy iron-ore slags, 3-12% of bauxite, 0-17% of coal gangue, 0-8% of kaoline, 0-5% of sodium silicate, 1-3% of sodium hydroxide, 0-4% of monopotassium phosphate and 0.5-5% of urea. The soilstone flocculant has the beneficial effects that formula components are processed through a special preparation method, then soilstone flocculants with different proportions are designed according to different soil types and specific physicochemical property of soil, a geochemical engineering principle is applied to engineering application, and the inherent chemical property of soil is changed, so that the improvement of the physical structure and great improvement of the mechanical property of the soil are promoted, and the effects of high engineering mechanical strength and good stability are achieved.

The invention discloses a pump station system vibration reduction measure and arrangement optimization analysis method, a pump station comprises a forebay, a first pipeline, an air cushion pressure regulating chamber, a second pipeline and a reservoir which are connected in sequence, and the first pipeline is provided with a water pump; the method is characterized by comprising the following steps: step 1, establishing a mathematical model of impedance of the air cushion type surge chamber by applying an electrical engineering principle and an equivalent capacitance and inductance theory; 2, solving the characteristic frequency of the system; and 3, introducing a disturbance item to carry out hydraulic vibration analysis on the pump station pressurized water supply system. According to therelation between the impedance modulus value and the vibration characteristic, through the expression of the characteristic frequency, the size parameter of the air cushion surge chamber and the arrangement of a pipeline system are reasonably optimized, and a theoretical basis is provided for reducing the vibration characteristic of a pump station system.

The invention relates to an anti-falling robot. The robot comprises a main support body and an auxiliary support body connected to the main support body. A fixing part is arranged on the auxiliary support body and comprises a joint element and a buffer element matched with the auxiliary support body. The main support body is a memory alloy piece and attached along the curvature of the human spinal column. The main support body is provided with a master control chip and a pressurizing device connected with the master control chip. The pressurizing device is an activated electromagnetic valve. The auxiliary support body is a memory alloy piece and attached to limbs and all joints of a human body. A pressure sensing device and an air bag are arranged on the auxiliary support body and connected with the master control chip. The air bag is connected with the pressurizing device. The anti-falling robot has following beneficial effects: parts conforming to the engineering principle of vertical movement of a human body are designed; furthermore, an intelligent determination and protection device is further arranged; when a judgment is made that a user has the tendency to fall down, a protection part is opened and prevents the user from directly falling down on the ground, thereby avoiding injuries.

The present invention provides a preparation method of iron / copper potassium / cilicone catalyst is characterized by that the addition method of adhesive adopts a method capable of fully and uniformly mixing adhesive and precipitant so as to ensure that the adhesive can be uniformly distributed in the prepared catalyst, and in the process of preparing catalyst it utilizes applied chemical engineering principle to make the metal salt solution and adhesive and precipitant mixed solution parallelly flow upwards in flowing state of piston flow and pass through the continuous precipitation reactor with multi-stage stirring blades so as to ensure the reproducibility of catalyst preparation.

The invention relates to a shrink ratio test stand for testing the performance of a brake material for a railway train. The analysis on the performance of the brake material is the important technical problem of research on all friction materials. The current standard regulates that the performance detection of all the brake materials for the railway and the railway trains can be tested on a 1:1 bench. Currently, few 1:1 railway train inertia braking benches are provided in China, so that the normal product detection is difficult to carry out. In the invention, a novel test bench for testing the performance of the brake material for the railway train, which consists of a driving mechanism, an inertia wheel configuration mechanism and the like, is arranged; a brake engineering principle isclosely combined; and a small sample geometric simulation shrink ratio test mode is used to be consistent with a 1:1 bench test mode. Due to the adoption of the shrink ratio test stand, a result corresponding to test data of the 1:1 bench can be obtained; and the consistency of the testing condition and the using working condition of the shrink ratio test stand in the whole testing process is really reflected. The shrink ratio test stand is convenient to operate and has complete functions and high technology content. The gap of the industry in China is filled. The rapid development of the field of the brake material in the industry is promoted.

The invention discloses a dual-bent handle, which comprises a holding part and an operating component arranged in the holding part and used for driving a traction wire to move, and is characterized in that the operating part comprises a rotating component; a rotating shaft of the rotating component is vertical to the length direction of the holding part; the rotating component is provided with a first fixing piece and a second fixing piece used for fixing the traction wire respectively; and the first fixing piece and the second fixing piece are distributed on both sides of the center line of the holding part. The device is operated flexibly, can be used for accurately controlling a tube body to arrive different focuses of infection, and is accordant with a human-machine engineering principle in design; a user can hold the holding part completely with the palm, so that in an operating process, fatigue on fingers and the palm are prevented; and moreover, the user can operate stably in the operating process.

The invention discloses a three-control bent handle which comprises a grasping part and a control component mounted at the grasping part. The three-control bent handle is characterized in that the control component comprises a first push-pull key, a second push-pull key and a rotating key, wherein the first push-pull key can be glidingly mounted at the grasping part in a length direction of the grasping part, and is connected with a sliding block; a first traction wire is fixed on the sliding block; the second push-pull key can be glidingly assembled in an inner cavity tube in the length direction of the grasping part, and drives the rotating key to glide in the length direction of the grasping part; a gear is used for fixing a second traction wire, and can rotate relative to the second push-pull key; and the rotating key is matched with the gear and drives the gear to rotate, so that the traction wires are driven to rotate. According to the device, the operation is convenient, a catheter is convenient to intervene, the design meets a man-machine engineering principle, a palm can completely hold the grasping part, and the handle can be stably operated when operated by a user.

The invention relates to a cleaning brush capable of being bent at will. The cleaning brush comprises a brush body and brush bristles. The brush body is integrally designed to be in a fish shape and is formed by connecting of a plurality of sections of strip plates through movable pieces, the brush bristles are fixedly arranged on the bottom surface of each section of strip plate, and a sponge layer is arranged on the upper surface of the brush body. The cleaning brush is simple in structure, the brush body can be bent and deform according to the shapes of utensils so as to enable the brush bristles to be attached to the surfaces of the utensils tightly, and the cleaning brush can be used for cleaning utensils with cambers or curved lines; the appearance of the brush body enhances interestingness and accords with the human body engineering principle, and therefore a user can use the cleaning brush with great facility, and the cleaning brush is convenient to use and practical.

The invention discloses a method for determining the outer dimension of a marine monitoring platform based on the human factor engineering principle. In particular, the method comprises the followingsteps: 1) determining the restriction relationship between the outer dimension of the monitoring platform and the main dimensions of a human body; 2) determining the knee space of the monitoring platform; 3) determining the maximum height and the thickness of the working surface of the monitoring platform; 4) determining the working surface depth gs of the monitoring platform and the visual distance sd of the operator. The invention fully considers the human body size of the crew, and makes the outline size of the marine monitoring platform accord with the human factor engineering principle, so as to meet the comfort requirements of the crew.

The invention realizes three invention contents, including: 1, a push-pull reciprocating acting bicycle front wheel driver, 2, a front-drive middle sitting posture and lying posture adjustable-height rest frame and 3, a sitting-lying dual-purpose front and rear dual-drive bionic bicycle on the basis of the engineering principle of human bodies and animals walking with four limbs. According to the bionic bicycle, a bicycle rider can take the adjustable-height rest frame as a supporting point and realize front and rear dual drive with hands and feet, so that the limitations of the conventional known bicycle on the limb and body fatigues and hurts as well as the use of physical ability of the whole body are broken through, the rider can act in a coordinated way and use and rest upper lower limbs and bodies alternatively during riding, and the average speed per hour is increased. Due to the invention of the ''sitting-lying dual-purpose front and rear dual-drive bionic bicycle'', the front and rear dual drive motion performed with hands and feet of the rider can be turned into running of a cheetah.

The invention particularly relates to a wall-mounted multifunctional clothes processing machine with the functions of washing, air drying, ironing and the like integrated. The wall-mounted multifunctional clothes processing machine comprises a roller washing machine, wherein the included angle of a roller center shaft and the wall projection of the roller center shaft is 45 degrees to 75 degrees. A shell of the roller washing machine extends upwards to form a machine body, a control panel is arranged on the machine body, and the upper plane of the machine body extends rightwards to form an ironing table. According to the wall-mounted multifunctional clothes processing machine, an oblique roller structure is used, the advantages of a horizontal roller and the advantages of a straight roller are integrated, the water seal requirement is lowered, after the wall-mounted multifunctional clothes processing machine is hung on a wall, the height of a roller is adaptive to the height of the arms of people, people do not need to bend down by a large margin, the oblique roller structure is close to the most energy-saving gesture of the arms of people, the taking convenience of people is greatly improved, fatigue of people is lightened, the roller washing machine accords with a man-machine engineering principle, and applicable people of the washing machine are greatly increased. In addition, the upper plane of the machine body extends rightwards to form the ironing table, people can execute the next link conveniently after washing clothes, and the effective household using space is further saved.

The invention discloses internal shock absorption type conveying equipment for a high-flexibility mortar structural body and an engineering principle of the internal shock absorption type conveying equipment. The internal shock absorption type conveying equipment is composed of a power transmission system, mounting plates, fixed blocks, a conveying system, flange locating discs and an automatic controller. The mounting plates are arranged above the power transmission system. The number of the mounting plates is two sets, the two sets of mounting plates are connected through the fixed blocks, and the conveying system is arranged between the two sets of mounting plates. The conveying system and the mounting plates are fixedly connected through the flange locating discs. The flange locating discs are located on the outer surfaces of the mounting plates. The automatic controller is located on one side of the power transmission system. The internal shock absorption type conveying equipment for the high-flexibility mortar structural body is novel and reasonable in structure, convenient and fast to operate, high in safety performance and suitable for being used for various construction site environments.

The invention relates to an earphone head structure, an earphone sleeve structure and an ear canal type earphone device, wherein the earphone head structure and the earphone sleeve structure are designed according to the difference of the left and right ear auricle structures of the human body, data analysis of the left and right auricle structures and the average value, and are applicable to thepublic and asymmetrical earphone head structure and earphone sleeve structure. The main bodies of the earphone head structure and the earphone sleeve structure can be fixed through three points of thetragus, the antitragus and the inferior crura of antihelix, so that the earphone heads of the earphone head structure and the earphone sleeve structure provided with the same are prevented from falling off from left and right ears due to movement of the user or in a gravity-free environment. The invention confirms to the human engineering, and the mutually-asymmetrical left and right earphone head structures and the earphone sleeve structures can fit to the natural form and engineering principle of the human body to the greatest extent. The user does not need any active adaptation in terms ofbody and spirit during the operation, and can greatly reduce the fatigue caused by wearing.

The invention discloses a bent plastic pipette head. The pipette head comprises a pipette head body and a filter element, wherein the pipette head body comprises a lower cavity, an upper barrel and aconnecting cavity connected with the lower cavity and the upper barrel, the lower cavity, the upper barrel and the connecting cavity are of an integrated structure, and the filter element is arrangedin an inner cavity of the lower cavity. The pipette head has the benefits as follows: compared with an original classical straight pipette head in each pipetting process, the operation action of the pipette head is more adapted to the artificial engineering principle, the operation process is easier and more convenient, the pipette head is particularly suitable for experiments requiring various long-term artificial pipetting operations, and the sterile effect in pipetting operation processes is guaranteed. The pipette head is bent, so that pressure gas flow is quickly downward under the regulation of the bent pipette head after leaving the oral liquid forwards and enters a mouth pipette under protection of a mask for various following precise pipetting operations.

The invention discloses a single bending handle which comprises a grabbing part and a control part glidingly mounted in the grabbing part, wherein a limit part for limiting the sliding range of the control part is arranged in the grabbing part; a catheter body is connected with the control part; and a traction fiber is connected with the grabbing part. The single bending handle is characterized in that the tail end of the control part is located in the grabbing part, and a device for adjusting the diameter of the tail end is arranged at the tail end of the control part. The single bending handle is designed in accordance with the man-machine engineering principle, a palm can grasp the grabbing part completely, so that during an operation process, fingers and the palm are not prone to fatigue, and the operation is stable during an operation process of a user.

The invention relates to a soilstone flocculant. The soilstone flocculant comprises the following components in percentage by mass: 5-15% of attapulgite, 5-12% of sepiolite, 3-48% of flyash, 5-37% of red mud, 2-30% of metallurgy iron-ore slags, 3-12% of bauxite, 0-17% of coal gangue, 0-8% of kaoline, 0-5% of sodium silicate, 1-3% of sodium hydroxide, 0-4% of monopotassium phosphate and 0.5-5% of urea. The soilstone flocculant has the beneficial effects that formula components are processed through a special preparation method, then soilstone flocculants with different proportions are designed according to different soil types and specific physicochemical property of soil, a geochemical engineering principle is applied to engineering application, and the inherent chemical property of soil is changed, so that the improvement of the physical structure and great improvement of the mechanical property of the soil are promoted, and the effects of high engineering mechanical strength and good stability are achieved.