343results about How to "Achieve improvement" patented technology

The invention provides a nano enzyme as well as a preparation method and application thereof. The preparation method of the nano enzyme comprises the following steps: adding a stabilizer into a preheated solvent, and carrying out ultrasonic treatment; then adding ferric salt and cobalt salt, and adding alkali to adjust the pH value of the solution; then transferring the solution into a reaction kettle for reaction; and after the reaction, washing and separating to obtain the product. The obtained nano-enzyme is appropriate and uniform in particle size and good in dispersity, the enzyme activity is as high as 9.56 U / mg, and the application of the nano-enzyme in immunochromatography detection and plant canker prevention and treatment is widened. When the immunochromatography detection card prepared from the nano enzyme is used for detecting human hemoglobin, the detection limit can reach 0.05 ng / mL and is at least 10 times lower than that of a commercially available kit. When the nano-enzyme suspension is used for preventing and treating the kiwifruit canker, the nano-enzyme suspension with the concentration larger than or equal to 0.1 mg / mL is used, and the plant canker can be well controlled.

The invention discloses an indoor environment performance optimization design method and system for a tall and large space building based on CFD and a multi-objective optimization algorithm, and the method comprises the steps: building a parameterized analysis model through combining with a BIM model, carrying out the digital simulation analysis of an indoor light environment and energy consumption through employing Honeybee Radio and Honeybee Entry plug-ins in Rhino and Grasshopper environments, determining optimization parameters and objectives, and carrying out the optimization of the indoor environment and energy consumption. And a BIM model and an IDF file corresponding to the optimal schemes are exported, the uniformity of the indoor airflow organization is evaluated based on FFD software, and parameters of the optimal schemes are determined. Compared with a traditional indoor environment optimization method, the high and large space building indoor environment performance optimization and evaluation method is efficient, accurate and economical, and has higher accuracy, higher adaptability and wider applicability. Natural lighting, building energy consumption and indoor three-dimensional thermal comfort can be considered at the same time, and optimization of the indoor environment performance of the tall and large space building is achieved.

The invention discloses a medical ultrasonic image quality control system based on multi-modal fusion. The medical ultrasonic image quality control system comprises a data preprocessing module used for collecting medical ultrasonic image data of different modals from different crowds in real time and preprocessing the medical ultrasonic image data; the dynamic self-adaptive fusion module is used for dynamically adjusting a fusion strategy according to the medical ultrasonic image data acquired in real time and introducing a self-adaptive mechanism to dynamically adjust weights of different modal data; the image enhancement module combines medical ultrasonic image data with a three-dimensional anatomical structure of a human body by utilizing an augmented reality technology to generate a visual and three-dimensional diagnostic image; the visualization module adopts a dynamic image display mode to present the change process of the diagnosis image in real time; a complete medical ultrasonic image quality control system is constructed by integrating a data preprocessing module, a dynamic adaptive fusion module, an image enhancement module, a visualization module and the like, the system can automatically process and analyze medical ultrasonic image data, and the quality control efficiency and accuracy are improved.

The utility model discloses a single-photon detector, which comprises a controller, a bias voltage generating circuit, a refrigeration temperature control circuit, a gating voltage generating circuit, an avalanche signal extraction circuit and an avalanche photodiode (APD) refrigeration box, and is characterized in that one end of the bias voltage generating circuit, one end of the gating voltage generating circuit and one end of the avalanche signal extraction circuit are connected to the controller; one end of the refrigeration temperature control circuit is connected to a TEC of the APD refrigeration box, the other end of the refrigeration temperature control circuit is connected to the controller, the other end of the avalanche signal extraction circuit is connected to an anode of an APD in the APD refrigeration box through an alternating current coupling capacitor C2, the anode of the APD is grounded through a sampling resistor R2, the other end of the bias voltage generation circuit is connected to a cathode of the APD through a resistor R1, and the APD refrigeration box is connected to the APD refrigeration box. And the other end of the gating voltage generation circuit is connected to the cathode of the APD through an alternating current coupling capacitor C1. According to the technical scheme of the utility model, the passive quenching of the free operation working mode is realized, the dead time processing circuit is simplified, and the noise level of the detector is reduced.

The invention discloses a saline alkali soil conditioner and a preparation method thereof, and belongs to the technical field of soil improvement. The soil conditioner is prepared from the following raw materials in parts by weight: 100-200 parts of modified phosphogypsum, 5-10 parts of a microbial agent and 10-20 parts of an activating agent, the modified ardealite is prepared by compounding ardealite and modified coal gangue and then modifying with rare earth; the microbial agent is prepared by mixing bacillus subtilis, streptomyces cellulosae and bacillus mucilaginosus. Chemical-physical-biological improvement technologies are combined, so that the physical and chemical properties of the saline-alkali soil are effectively improved, the biological activity of the soil is improved, the growth of crops is promoted, the yield and disease resistance of the crops are improved, and the resource utilization rate of the ardealite is increased.

The invention relates to the field of fire hoses, and provides a flame-retardant high-strength fire hose and a preparation method thereof.The fire hose sequentially comprises an outer protection layer, a flame-retardant layer, a woven layer, a reinforcing layer and a lining layer from outside to inside; the flame-retardant layer contains a surface-modified magnesium hydroxide micro-tube coated flame retardant, so that the flame-retardant effect is enhanced; the reinforcing layer contains the surface-modified bead-shaped silicon carbide nanowires, so that the mechanical property of the reinforcing layer can be remarkably improved. The five-layer composite structure and the design of multiple functional materials are adopted, comprehensive improvement of flame retardance, mechanical property, use convenience and the like is achieved, the problem that a traditional fire hose is insufficient in flame retardance and mechanical property is solved, and the fire hose has wide application value.

The invention relates to a negative active material and a preparation method thereof, a negative pole piece, a battery and an electric device. The negative electrode active material comprises: an inner core, which comprises porous graphite and a sulfur-doped hard carbon-metal oxide material, and the sulfur-doped hard carbon-metal oxide material is arranged in a pore channel of the porous graphite; the shell layer coats at least part of the surface of the inner core, and the shell layer comprises a polyaniline material. According to the negative electrode active material provided by the invention, through the synergistic effect among the porous structure of the graphite, the sulfur-doped hard carbon-metal oxide material and the shell layer containing the polyaniline material, the capacity performance, the rate performance and the cycle performance of the battery are improved at the same time, and the comprehensive improvement of the material performance is realized.

The invention provides a substrate whole plate engineering glass crushing system which comprises a main frame body, a mounting frame is fixedly mounted in the main frame body, a material guiding mechanism is assembled at the top of the mounting frame, a crushing mechanism is assembled on the mounting frame on one side of the material guiding mechanism, a transfer groove for receiving materials is formed in the mounting frame, and the transfer groove is formed in the mounting frame. A guide opening is formed in the top of the main frame body, a material taking mechanism penetrating through the guide opening is slidably mounted at the top of the main frame body, an extraction mechanism penetrating through the guide opening is assembled at the top of the main frame body, and the working end of the extraction mechanism extends into the main frame body. Through mutual cooperation between the overturning assembly and the placing assembly, mutual connection between the overturning assembly and the placing assembly is achieved, the overturning assembly and the placing assembly can be rapidly switched to the feeding state to wait for feeding, it is guaranteed that subsequent assemblies are rapidly extracted, workers only need to move the placing assembly to the extracting position, manual feeding and feeding are not needed, and the labor intensity of workers is reduced. And safe operation of the engineering glass recycling device is ensured.

The invention relates to an organic-inorganic composite microsphere and a preparation method thereof, and is characterized in that an amphiphilic polylactic acid organic material and inorganic particles are adopted, emulsification is carried out through a surfactant and supergravity equipment to form an S / O / W coated microsphere suspension emulsion, and then separation and freeze drying are carried out to obtain the organic-inorganic composite microsphere. The prepared organic-inorganic composite microsphere material is rich in various active components, can stimulate regeneration of tissue collagen in a more diversified manner as a component of a regenerative injection anti-aging filler, adopts a method for preparing microspheres through supergravity emulsification, and enhances a liquid-liquid heterogeneous micro-mixing process in a supergravity environment, so that the regeneration of the tissue collagen can be promoted, and the regeneration of the tissue collagen can be promoted. The prepared composite microsphere product is better in quality, the particle size distribution of the microspheres is more uniform and concentrated, the size of the microspheres is adjustable in a wide particle size range of 100nm-200mu m, and the method can realize continuous production, is good in stability and is easy to amplify.

The invention relates to the technical field of stress-resistant cultivation of rice, and particularly provides a method for increasing the planting yield of rice in a coastal mild salinized land by applying biochar. According to the method, rice straw biochar is applied to the coastal slightly-salted land, the rice straw biochar is uniformly applied at a time during soil preparation before rice transplanting in the first year, it is guaranteed that the biochar is fully and uniformly mixed with a soil layer of 0-20 cm, and the biochar is not applied any more in the second year. According to the method, the rice straw biochar is uniformly applied at one time during soil preparation before rice transplanting, the effect of continuously improving the coastal slightly-salted land for two years is achieved, the addition amount of the biochar can be effectively saved, the improvement cost is reduced, and the rice planting yield is increased.

An adaptive virtual synchronous machine control method based on deep reinforcement learning belongs to the field of power grid operation control. It establishes a photovoltaic storage grid-connected model containing photovoltaic systems, battery energy storage and variable loads; uses virtual synchronous generator control to achieve complementary photovoltaic output power for the battery energy storage system; in order to solve the problem of microgrid frequency deviation caused by microgrid load power changes, a deep reinforcement learning algorithm is used to control and adjust the virtual inertia and damping coefficient of the virtual synchronous generator; the double deep Q learning algorithm in deep reinforcement learning is used to control the virtual inertia and damping coefficient; a double-layer evaluation network is constructed, combined with a reward function, and after multiple trainings, the adaptive adjustment of the virtual inertia and damping coefficient is achieved. It uses deep reinforcement learning technology to adaptively control the virtual inertia and damping coefficient, suppress the frequency deviation, accelerate the recovery of the system operating frequency, and improve the stability of the system.

The utility model provides a roll-over stand for hoisting roll-over equipment, which comprises a main support and a hanger support, the main support is provided with a first end and a second end, the first end is hinged with the front end of a base frame, and the second end is hinged with the hanger support; the overturning frame has a first posture, a second posture and a third posture, when the overturning frame is in the first posture, the main support is vertically arranged, the hanging bracket support is perpendicular to the main support and extends towards the side away from the base frame, and the overturning frame is in a hoisting state; the overturning frame overturns towards the base frame, so that when the main support is horizontally arranged, the overturning frame is converted into a second posture; and when the hanging bracket support is folded to be parallel to the main bracket and extends towards one side far away from the main bracket, the turnover frame is switched to a third posture. According to the utility model, the switching of three postures of the turnover frame is matched with the base frame, the hanging bracket and the turnover driving piece, so that the lifting, fixed turnover and avoidance of the vertically arranged main crane are realized, and the hoisting, installation and fixation of the tower crane are quickly completed.

The invention discloses a sizing agent for a bulletproof material as well as a preparation method and application of the sizing agent, and belongs to the field of functional materials. The sizing agent for the bulletproof material comprises the following components: an adhesive, dopamine hydrochloride and tris (hydroxymethyl) aminomethane hydrochloride, wherein the mass ratio of the adhesive to the dopamine hydrochloride to the tris (hydroxymethyl) aminomethane hydrochloride is (99.36 to 99.68) to (0.2 to 0.4) to (0.12 to 0.24). The sizing agent can be used for UHMWPE fibers and further used for bulletproof materials. The sizing agent prepared by the invention can be used for a waterborne polyurethane adhesive; and the preparation process is simple and suitable for industrial use.

The invention provides a pneumatic nailing gun, and belongs to the technical field of nailing guns. The problem of how to reduce abrasion of a locking piece and a firing pin is solved. According to the pneumatic nailing gun, a lifting part comprises a rotating shaft and a rotating disc for driving a firing pin to move, the rotating shaft and the rotating disc are connected and arranged in a mounting cylinder, a rotating piece is arranged on the rotating shaft or the rotating disc, a first pawl is rotationally arranged on the rotating piece, a gear ring matched with the first pawl is further arranged in the mounting cylinder, and first ratchets are arranged on the inner side face of the gear ring; the first pawl is located on the inner side of the gear ring and engaged with the first ratchet to limit rotation of the rotating disc. By means of the structure, lifting, locking, unlocking and nailing of the firing pin can be achieved without arranging an additional locking structure on the firing pin, abrasion of the firing pin is reduced, the rotating disc, the rotating shaft, the first pawl used for locking the firing pin and the gear ring are all arranged in the mounting cylinder, and therefore the nailing gun is more compact in structure.

The invention discloses an operation state control method applied to a centrifugal machine. A rotating shaft is driven to rotate according to a rotating speed median value so that mixed liquid can be evenly distributed into each set of rotating drums; after separation of n parts of mixed liquid is completed, a set of rotary drums with the best separation effect in centrifugal separation of each set of rotary drums is confirmed, and the optimal centrifugal force of mixed liquid separation is obtained through calculation; calculating the radius of the energy-saving rotary drum to obtain a corresponding energy-saving rotary drum sleeve, and configuring the optimal rotating speed of the rotating shaft according to the position of the rotary drum sleeve and the optimal centrifugal force; and the mixed liquid is guided to the fixed drum sleeve. And driving the rotating shaft to rotate according to the optimal rotating speed, and separating the mixed liquid. Mixed liquid can be separated at the same time through multiple centrifugal forces. Through one-time separation of a plurality of rotary drum sleeves, the most suitable separation rotary drum can be determined at the fastest speed, and the separation efficiency is improved. And only one set of drum sleeve is used for separation again, so that the efficiency is high, and meanwhile, energy is saved.

The invention provides a frequency-modulated continuous wave laser radar chip, and relates to the technical field of laser radars, and the frequency-modulated continuous wave laser radar chip comprises a tunable laser, a transmitting optical phased array, a receiving optical phased array, and a balanced photoelectric detector. The tunable laser is used for outputting detection laser signals and realizing wavelength tuning, the transmitting optical phased array is used for transmitting laser signals outwards, the receiving optical phased array is used for collecting light in an external space into an optical waveguide to serve as signal light, and the balance photoelectric detector is used for receiving local light and the signal light. And the optical signal is converted into an electric signal with distance information and speed information of the object, so that distance measurement is realized. According to the invention, the wavelength tuning of the laser radar chip is controlled more finely through the tunable laser, the wavelength tuning is realized, and the ranging precision of the laser radar is improved; and the tunable laser adopts a multi-path semi-reflective array waveguide, so that the ranging stability of the laser radar chip is improved.

The invention belongs to the technical field of electronic reconnaissance, and discloses an ultra-wideband radio frequency receiving front-end SIP module system based on HTCC, which comprises a three-dimensional package for signal transmission, and the three-dimensional package comprises a BGA layer, a package internal signal transmission layer, a top microstrip wiring and a device placement layer; the miniaturization advantage is obvious: the packaging substrate is formed by sintering aluminum oxide ceramic at high temperature, and the packaging substrate has 12 layers and is small in size. And the system integration degree is high: a single SIP module can be integrated with radio frequency front-end systems such as an amplitude limiter, a radio frequency switch, a filter, a low noise amplifier, a digital control attenuator and the like, so that related function indexes are realized. According to the radio frequency transmission line and power supply structure design, the structure comprises a radio frequency signal transmission line and a power supply distribution line. Wherein the routing of the radio frequency layer adopts a quasi-coaxial-strip line-quasi-coaxial structure, and good signal transmission can be realized in a frequency band of 2-10GHz.

The invention relates to the technical field of cable circulation current monitoring, in particular to a time-sharing self-powered cable circulation current monitoring device, which comprises a CT (Current Transformer) energy taking module comprising a current transformer and a rectifying circuit; the energy storage module comprises an energy storage capacitor and a charging comparator; the current signal processing module is used for dividing the voltage of the output end of the rectifying circuit and weakening the error amount of the pulsating direct current signal by outputting a first current value and a second current value; a 4G module; and the main controller is used for determining the current measurement value of the cable, adjusting the current monitoring frequency of the current transformer according to the fluctuation value of the current measurement value, and determining whether to adjust the transmission power of the current measurement value transmitted from the 4G module to the background or adjust the amplification gain of the pulsating direct current signal according to the number of abrupt change points in the current change image. According to the invention, the monitoring precision and the monitoring range are increased.

The invention discloses a salt-alkali-tolerant growth-promoting ectopseudomonas DHS-HJ-IAA-2 strain and an application thereof, and belongs to the technical field of microorganisms. According to the invention, a strain of salt-resistant, alkali-resistant and drought-resistant pseudomonas sp. DHS-HJ-IAA-2 is screened, and the pseudomonas sp. DHS-HJ-IAA-2 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.36164. Experimental results show that the ectopseudomonas DHS-HJ-IAA-2 has the functions of producing IAA, fixing nitrogen, dissolving potassium, degrading cellulose and lignin, inhibiting phytopathogen and the like, and can remarkably improve the bacteria abundance of saline-alkali soil, improve soil fertility and promote plant growth in a saline-alkali environment. The invention provides a new strain resource and a technical means for improving saline-alkali soil and planting crops on the saline-alkali soil, and realizes improvement of the saline-alkali soil from two aspects of soil-crop-microorganism comprehensive action and microorganism-plant synergistic action.

The utility model discloses a concrete raw material stirring and mixing device which comprises an installation bottom plate and a tank cover, a stirring tank is installed at the upper end of the installation bottom plate through a plurality of supporting plates, a valve is arranged on the stirring tank, and a driving mechanism used for driving the tank cover to move is arranged on the installation bottom plate. The driving mechanism comprises a mounting frame fixedly connected to the upper end of the mounting bottom plate, a threaded rod and a limiting rod are arranged on the mounting frame, a third motor is mounted at the upper end of the mounting frame, a moving assembly is arranged on the threaded rod, and the end, away from the threaded rod, of the moving assembly is fixedly connected with the side wall of the tank cover. And a second motor is mounted at the upper end of the tank cover through a mounting plate. According to the stirring device, the driving mechanism is arranged, the stirring tank, the tank cover and the stirring plate can be cleaned separately when the device is cleaned, the device is convenient to clean, meanwhile, the influence of residues of raw materials on the stirring space in the stirring device is reduced, and therefore the practicability of the device is improved.

The invention relates to the technical field of hinges, and discloses a damping rotating shaft and an asymmetric hinge, the damping rotating shaft comprises a shaft body, the main body of the shaft body is a shaft rod, annularly distributed tooth bodies are arranged on the outer side surface of the middle section of the shaft rod, one end of the shaft rod is sleeved with a first oil storage part and a second oil storage part, and a first cavity is formed in the first oil storage part; a first cavity is formed in the first oil storage part, a second cavity is formed in the second oil storage part, the first cavity and the second cavity are communicated through a pipe body, a push block is installed at one end of the shaft rod and located in the first cavity, the rotating shaft rod pushes oil in the first cavity through the push block to enter the second cavity through the pipe body, and an elastic assembly is arranged in the second oil storage part. The elastic assembly pushes oil in the second cavity to flow back into the first cavity through the pipe body. The shaft rod synchronously rotates along with the pushing block, the pushing block is driven to push hydraulic oil in the first cavity to enter the second cavity through the pipe body in the rotating process of the shaft rod, the second spring pushes the pushing ring to reset, and therefore automatic resetting is achieved.

The invention provides a universal ultra-wideband reconfigurable receiving chip, and the chip comprises a plurality of frequency conversion channels which are used for carrying out the frequency mixing and amplification processing of radio frequency signals of different frequency bands, and outputting the processed radio frequency signals; the orthogonal generation circuit is used for providing a local oscillator signal for the frequency conversion channel; and the radio frequency switch module is electrically connected with the frequency conversion channel and is used for selecting different links for the radio frequency signals of different frequency bands. A plurality of frequency conversion channels are designed in a chip structure, and a reconfigurable design of a link and a unit layer is adopted, so that coverage of a 0.8-40GHz ultra-wide frequency band is realized; by integrating various circuit modules such as a broadband low-noise amplifier, an orthogonal mixer, a switch selection module and a baseband amplifier, multifunctional receiving processing such as amplification, frequency conversion, filtering and attenuation of a radio frequency input signal is realized; and multiple working modes and parameter settings are flexibly configured through the SPI interface, so that the chip architecture achieves the effects of ultra wide band, multiple functions and high flexibility.

The invention relates to a crop combined seeder applying Beidou positioning and a working process. The crop combined seeder comprises a main rack and a rear rack hinged to the main rack, a main wheel set which actively moves forwards is arranged on the main rack; the rear rack is provided with a land wheel piece which moves forwards in a follow-up manner; a plough share assembly is arranged on the main frame; a front soil breaking assembly is arranged in front of the plough share assembly and used for breaking a surface soil layer; a seed box body assembly and a mud fertilizer assembly arranged on one side of the seed box body assembly are arranged on the main rack; the seed box body assembly is arranged behind the plough share assembly; the land wheel part is arranged behind the seed box body assembly; the device is reasonable in design, compact in structure and convenient to use.

The invention belongs to the technical field of cable installation, and particularly relates to an electric bypass flexible cable lifting device and a working method thereof. Comprising a top plate, guide rail plates, a position adjusting assembly and a winding drum assembly are arranged at the top of the top plate, a third connecting assembly is slidably connected between the two guide rail plates, the third connecting assembly penetrates through the top plate and is connected with a first connecting assembly, and the first connecting assembly is connected with a vertical stop lever; a side vertical plate is arranged at the bottom of the top plate, a lifting driving assembly is arranged on the side face of the side vertical plate and connected with a second connecting assembly, the second connecting assembly is connected with a limiting assembly and a telescopic driving assembly, the telescopic driving assembly is used for driving the limiting assembly to stretch out and draw back, and the lifting driving assembly is used for driving the second connecting assembly to rise and fall; the device can assist workers in bypass flexible cable construction operation, the operation efficiency is improved, potential safety hazards of manual operation are eliminated, and meanwhile the labor intensity of the workers is reduced.

The utility model discloses an upper frame type reinforced chassis with a power amplifier, which comprises a chassis, the interior of the chassis is divided into a front working area and a rear working area by a back plate, the front working area is used for accommodating a first heat dissipation device, a buzzer, and a main control board, an acquisition filter board and a network communication module which are inserted in a CPCI slot on the front end surface of the back plate; a partition plate is transversely arranged in the rear working area, and a second power source, a power amplifier module, a second heat dissipation device and a voltage and current collection module are arranged in the space below the partition plate. According to the utility model, the backboard is arranged in the case, the main control board, the acquisition filter board and the network communication module are inserted in the CPCI slot of the backboard, and the voltage and current acquisition module, the power supply module and the power amplifier module are arranged in the case body space behind the backboard, so that noise filtering and amplification of a certain equipment signal on the submarine can be realized.

The invention discloses a stone processing and conveying device, and relates to the technical field of stone conveying. The conveying mechanism comprises a transmission mechanism used for conveying, a rack connected with the transmission mechanism, a sweeping assembly connected with the transmission mechanism, a dust collection assembly connected with the sweeping assembly, a conveying wall connected with the conveying mechanism and a straightening assembly connected with the conveying wall. The stone sorting device has the advantages that when stone is placed on the conveying belts on the two sides of the transmission mechanism, telescopic cylinders in the straightening assemblies stretch out and draw back along with telescopic springs and abutting blocks, a plurality of rollers rotate, the posture of the stone is straightened in cooperation with the conveying belts, and the stone sorting device is high in sorting efficiency and good in sorting effect. The stone conveying device solves the problems that due to the fact that the shapes of stones are irregular, the stones are often stuck, the posture is not correct, the conveying efficiency is affected, and even equipment is damaged.

The application provides a static pressure balance type underwater self-driven flexible touch pressure sensing finger, which comprises a touch pressure sensing unit, a hydraulic cylinder, a pressure transmission unit, a piezoelectric transducing unit, a transducing unit support, a platinum electrode and a base, the touch pressure sensing unit and the pressure transmission unit are connected with the hydraulic cylinder through bolts, and the oil cavity between the piston end faces is filled with hydraulic oil; the piezoelectric transducing unit is inserted into the stepped through hole in the cylinder wall of the transducing unit support; the pressure transmission unit and the base are connected with the transducing unit support through a flange and a threaded pair; the platinum electrode is fixed in the lead hole of the piezoelectric transducing unit, and the lead of the platinum electrode is led out from the lead hole of the base and connected to a pressure detection circuit. Based on the area effect of Pascal's principle and the solid-liquid interface double electric layer principle, the application can convert the tiny pressure detected by the finger tip into a larger elastic deformation of the flexible hose, so as to generate a high-amplitude ionic current signal and transmit it to the pressure detection circuit, and realize the sensing, amplification and measurement of the pressure signal.

This utility model relates to the field of steam turbine technology and discloses a self-tightening internal hole gripping device, including a mandrel and a first positioning sleeve. The first positioning sleeve has a small-diameter end and a large-diameter end, and the small-diameter end and the large-diameter end are coaxially provided with through holes. The mandrel passes through the through holes of the small-diameter end and the large-diameter end in sequence, and the mandrel can move axially relative to the first positioning sleeve. One end of the mandrel is connected to a lifting ring, and the other end is connected to a truncated cone with a radius that gradually increases from left to right. The radius of the through hole at the large-diameter end is larger than the maximum radius of the truncated cone, and the radius of the through hole at the small-diameter end matches the radius of the mandrel. At least two equidistant movable parts are slidably installed on the large-diameter end. One end of the movable part is located inside the first positioning sleeve, and the end is an arc-shaped structure that matches the side wall of the truncated cone. The other end is located outside the first positioning sleeve. When the mandrel moves axially towards the lifting ring, the truncated cone pushes the movable parts to move outward of the first positioning sleeve. This utility model is beneficial for reducing labor intensity and safety risks, as well as improving installation accuracy.

This utility model discloses an automatic adjustment device for spiral welded pipe forming rollers, comprising: a supporting base plate; a first side plate fixedly connected to one upper side of the supporting base plate; a second side plate fixedly connected to the other upper side of the supporting base plate; a fixing sleeve fixedly connected to the inner side of both the first and second side plates; a second motor fixedly connected to one end of the fixing sleeve; a threaded sleeve fixedly connected to the driving end of the second motor; a support rod provided at one end of the threaded sleeve; an external thread provided on the rear side of the support rod; the external thread and the threaded sleeve being threadedly engaged; and a contact roller rotatably connected to one end of the support rod. By configuring the second motor, threaded sleeve, support rod, and contact roller, the second motor drives the threaded sleeve to rotate, engaging with the external thread at one end of the support rod to achieve thread extension or retraction, thus providing length support for the contact roller and facilitating automatic adjustment.

The utility model belongs to the technical field of ground well lid operation, and particularly relates to a well lid auxiliary lifting manipulator which comprises a fixing frame, a moving rod is arranged on the fixing frame, a hinge arm is hinged to the outer wall of the moving rod, a lifting device is arranged at the end of the hinge arm and comprises a stand column, and a hydraulic cylinder is fixedly connected to the outer wall of the stand column. According to the auxiliary lifting manipulator for the well lid, mechanical grabbing and lifting of the well lid are achieved through the lifting device, the hydraulic cylinder, the air cylinder and other automatic assemblies, the operation efficiency is remarkably improved through the design, the labor intensity of workers is relieved, and compared with a traditional manual grabbing mode, mechanical operation is faster and more accurate; according to the well lid opening and closing device, the well lid can be opened and closed within a short time, so that the working efficiency is improved, meanwhile, the supporting area of the base is effectively enlarged through the design of the sliding plate and the hinge rod, the device can be prevented from shaking when the well lid is grabbed, and the stability in the well lid grabbing process is improved.