281results about How to "Avoid mechanical damage" patented technology

The invention discloses a seven-degree-of-freedom mechanical arm inverse kinematics solving method, system and device based on numerical iteration. The method comprises the steps that S1, a D-H kinematics model of a mechanical arm is established based on a joint configuration of the seven-degree-of-freedom mechanical arm; s2, calculating a Jacobian matrix according to the joint angle sequence; s3, introducing a weight matrix to suppress the joint speed at the edge of the joint range; s4, introducing a damping factor, and calculating to obtain an optimized Jacobian pseudo-inverse matrix; s5, the pose error between the expected tail end pose and the current tail end pose of the tail end actuator of the mechanical arm is calculated; s6, converting the pose error into a joint angle adjustment amount by using the optimized Jacobian pseudo-inverse matrix to obtain a joint angle iterative formula; and S7, based on the pose error, the joint angle of each rotating joint of the mechanical arm is determined through a numerical iteration method. According to the method, the problem of unstable solution of a traditional analytical method under the singular configuration can be avoided, and the calculation efficiency and the numerical stability are improved.

The invention provides a thrombus removing device which comprises an outer catheter, a blood vessel expansion mechanism, a developing tube and a suction assembly, the blood vessel expansion mechanism is installed in the outer catheter in a sliding mode, and the suction assembly used for sucking and removing broken thrombus is connected to the outer catheter; the blood vessel expansion mechanism comprises an expansion rod, a rotating sleeve, an outer sliding sleeve and an arc-shaped cutter, the arc-shaped cutter is hinged between the expansion rod and the rotating sleeve, the expansion rod is hinged to the outer sliding sleeve, the rotating sleeve is slidably installed in the outer sliding sleeve, and the outer sliding sleeve is slidably installed in the outer catheter; one end of the outer sliding sleeve is connected with a first driving assembly for driving the arc-shaped cutter to open; a front net basket is arranged in the developing pipe, a core pushing pipe for pushing the front net basket out of the developing pipe is arranged in the developing pipe, and one end of the developing pipe is connected with a second driving assembly for driving the core pushing pipe. The thrombus removing device is scientific and reasonable in structural design, convenient to operate, good in using effect, small in damage to blood vessels, good in thrombus removing effect and capable of being used and popularized.

The invention discloses a nested self-adaptive adjustment loading device and method for sheet glass tensile strength testing, and belongs to the technical field of glass tensile strength tests.The device comprises an upper mounting mechanism and a lower mounting mechanism, the upper mounting mechanism and the lower mounting mechanism are connected through a sliding assembly, and the sliding assembly comprises parallel linear guide rails; the lower end of the parallel linear guide rail is fixed on the lower mounting mechanism, and the upper end is slidably connected with the upper mounting mechanism. According to the nested self-adaptive adjustment loading device and method for testing the tensile strength of the sheet glass, the design of double sliding rails is adopted, the upper clamp slides on the two parallel linear guide rails, left-right and in-plane relative displacement is further limited, the silica gel gaskets are adopted to prevent the glass from being in direct contact with the clamp, and the clamping efficiency is improved. When the contact surface of the clamp and glass is not smooth and possibly has stress concentration, the low-modulus silica gel gasket can provide a chance of self-adaption to the side surface of a groove of the clamp for a glass sample, and is suitable for different types of sheet-shaped glass samples.

The invention discloses a Schiff base modified silane / polyurethane antifouling coating as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out dehydration reaction on an aldehyde substance and amino silane, and hydrolyzing to prepare a Schiff base modified silane monomer; s2, dewatering polyether glycol, uniformly mixing the dewatered polyether glycol with diisocyanate, and carrying out cooling reflux under the conditions of stirring and 60-80 DEG C to obtain a polymer A; s3, uniformly mixing the polymer A, a Schiff base modified silane monomer, a solvent and a dibutyltin dilaurate catalyst, and reacting to obtain a polymer B; and S4, coating a base material with the polymer B, and curing to obtain the coating. The anti-fouling coating has a good anti-fouling effect, the coating can effectively inhibit growth of marine fouling organisms based on Schiff base, the active anti-fouling requirement of the coating can be met, meanwhile, the coating has good base material adhesion and wear resistance, and the service life of the coating is guaranteed.

The invention relates to the technical field of battery piece cutting, in particular to a photovoltaic panel battery piece cutting device which comprises a cutting device body, a laser head and a cutting table and further comprises multiple negative pressure suction cups, the negative pressure suction cups are located on the cutting table, and the multiple negative pressure suction cups are used for adsorbing and fixing the battery piece; the fixing assembly is arranged on the cutting table, and the fixing assembly is used for driving the negative pressure suction cup to adsorb and fix the battery piece; the photovoltaic panel battery piece cutting device comprises a fixing assembly and a separation assembly, the separation assembly is arranged on the fixing assembly, the separation assembly is used for driving a negative pressure suction cup to drive a battery piece subjected to laser cutting to deflect, and therefore the battery piece which is not completely cut is controlled to be separated along a preset cutting line. The negative pressure suction cup can firmly adsorb the battery piece, meanwhile, the separation process of the battery piece can be accurately controlled by controlling deflection of the negative pressure suction cup, automatic operation is achieved, manual intervention is reduced, and the cutting efficiency is improved.

The invention relates to the technical field of rock drilling equipment, in particular to mine rock blasting drilling equipment and a blasting method. The equipment comprises a drill rod, a sliding mechanism and a driving mechanism, the middle of the drill rod is provided with an airflow channel, and the front end is connected with a pneumatic impactor and an impact drill bit; the sliding mechanism comprises a sliding rail, a sliding seat and a pushing mechanism; and the driving mechanism realizes rotation of the drill rod through the power device, the base and the positioning sleeve. Particularly, the pre-pressing buffering device can provide compressed air for the drill rod and provide elastic thrust, and it is guaranteed that the drill rod works stably. In addition, the transmission efficiency is improved through the meshing design of the transmission part and the abutting part of the drill rod, meanwhile, a multi-stage buffering structure is arranged, and the service life of equipment is effectively prolonged. The technical effects that the drilling efficiency is improved, the energy consumption is reduced, and the equipment reliability is enhanced are achieved.

The high-temperature fan of the granulating and drying hot-blast stove relates to the technical field of compound fertilizer processing and production and comprises a base, a bearing support is fixed to the rear end of the base, a main shaft is rotationally installed in the middle of the bearing support, a main umbrella wheel is coaxially arranged at the input end of the main shaft, and trapezoidal fins are fixed to the position, close to the main umbrella wheel, of the rear end of the main shaft; the spindle is sleeved with a shaft sleeve, and a labyrinth seal is arranged at the front end of the shaft sleeve. In the using process, only one motor needs to be arranged, energy is supplied to the high-temperature fan, meanwhile, automatic circulation of cooling water is achieved through linkage driving of the circulation assembly, heat exchange cooling is conducted on the circulating cooling water through the cooling fan, and due to the fact that compressor refrigeration and water pump circulation do not need to be used, the cooling efficiency is greatly improved. Therefore, efficient circulating cooling of the cooling water can be achieved with a simple structure and extremely low cost, the problem of abrasion between parts of the fan caused by high-temperature expansion is solved, and heat transmitted to the bearing from a high-temperature medium is effectively controlled.

The invention discloses a modified hexagonal boron nitride nanosheet, a modified hexagonal boron nitride grinding fluid and a preparation method of the modified hexagonal boron nitride nanosheet, the modified hexagonal boron nitride nanosheet is a hydroxylated h-BN nanosheet prepared through an electrolytic method, and the modified hexagonal boron nitride grinding fluid comprises the following components in percentage by mass: 60-80% of deionized water; 5-15% of a surfactant II; 5-15% of a modified hexagonal boron nitride nanosheet; 5-15% of a grinding aid; and a pH regulator II. H2O2 is used as a mild oxidizing agent, and hydroxyl can be introduced under the condition that the basic structure of h-BN is not damaged; the electrolysis process not only promotes decomposition of H2O2 to generate active hydroxyl, but also contributes to stripping of h-BN; more uniform hydroxyl distribution can be generated on the h-BN surface through the electrolytic method; compared with a ball milling method and an electrolytic method, the hydroxylation and stripping processes can be completed within a shorter time, mechanical damage in the ball milling process is avoided, the integrity of the h-BN nanosheet is kept, and expanded production is easy.

The invention belongs to the field of biological catalysis, and particularly relates to an enzyme immobilization carrier, an immobilized enzyme and a preparation method and application of the enzyme immobilization carrier, the enzyme immobilization carrier and the immobilized enzyme, the enzyme immobilization carrier comprises aminated magnetic Fe-Ni nanoparticles, the enzyme immobilization carrier has good stability and is easy to separate and recycle, and the enzyme activity can still be kept at 90% or above after the enzyme immobilization carrier is recycled 12 times.

The invention discloses a jasmine flower liquid cutting propagation device and method, and the device comprises a cutting groove which is used for containing a nutrient solution and is provided with a water inlet and a water outlet, the bottom of the cutting groove is provided with a plurality of partition plates, and the partition plates are arranged in a crossed manner to form a plurality of planting grooves at intervals; the cutting slip fixing plate is arranged in the cutting groove and located above the partition plate, the cutting slip fixing plate is formed by arranging a plurality of planting plates, a planting hole is formed in the middle of each planting plate, and the planting plates and the planting grooves are arranged in a one-to-one correspondence mode. When the device and the method are adopted to breed the jasmine flowers, the base parts of the jasmine flower cutting slips are good in growth state, and the phenomena of mildewing, rotting and pest and disease damage do not occur. According to the method, new technical support is provided for space utilization, program simplification, cost saving and yield improvement of jasmine flower cutting propagation production.

The utility model discloses a novel surface-mounted temperature sensor. Comprising a thermistor and further comprises a plastic package body, a frame base island and four frame pins located on the two sides of the frame base island are arranged in the plastic package body, and the frame pins on the two sides extend out of the edges of the two sides of the plastic package body respectively; the thermistor is located in the plastic package body and comprises thermal sensitive ceramic, metal electrodes are arranged at the top and the bottom of the thermal sensitive ceramic respectively, the metal electrode at the top of the thermistor is connected with the frame pins on the two sides through two wires respectively, and the metal electrode at the bottom of the thermistor is connected with the base island plane at the top of the frame base island. And the base island plane is respectively connected with the other frame pins on the two sides through two wires. The temperature sensor has the advantages of strong vibration resistance, long-term reliability and sensitive temperature sensing.

The utility model belongs to the field of seedling transplantation, and discloses an automatic transplanting and seedling supplementing machine, which adopts a non-mechanical constraint mode to transfer seedlings, prevents the seedlings from being mechanically damaged and ensures high-quality cultivation of subsequent crops, and comprises a seedling supplementing bottom plate, a seedling supplementing steering engine, a seedling supplementing turntable and a seedling supplementing falling cylinder, the seedling supplementing steering engine is fixedly arranged on the seedling supplementing bottom plate, the seedling supplementing turntable is arranged on an output shaft of the seedling supplementing steering engine, the plurality of seedling supplementing falling cylinders are rotationally and symmetrically arranged on the seedling supplementing turntable, falling cylinder lower covers are hinged to the lower ends of the seedling supplementing falling cylinders, and a gap between the lowest part of each falling cylinder lower cover and the seedling supplementing bottom plate is smaller than a preset distance; the transplanting assembly comprises a lifting base and a transplanting cylinder, the lifting base is fixedly arranged on the chassis base frame, the transplanting cylinder is movably arranged on the lifting base, the transplanting cylinder corresponds to the seedling supplementing through hole in the vertical direction and is separated from the seedling supplementing through hole through a seedling supplementing bottom plate, and a transplanting cylinder cover capable of being opened and closed is hinged to the bottom of the transplanting cylinder.

The invention discloses a method for cleaning a non-flat surface of a power transmission line insulator through laser-induced bubbles. The method comprises the steps that firstly, pretreatment on the power transmission line insulator is executed; and then the laser cleaning system is used for conducting laser irradiation on the preprocessed power transmission line insulator, so that laser-induced bubble cleaning of the non-flat surface of the power transmission line insulator is achieved. According to the method, an efficient and non-contact cleaning technology can be provided, and compared with a traditional electrified manual cleaning method, the technology effectively avoids high risks caused by electrified cleaning of the surface of the insulator of the high-voltage transmission line in the cleaning process, so that the operation difficulty and potential safety hazards of cleaning personnel are greatly reduced. According to the cleaning mode, the safety is improved, the completeness of the insulator is guaranteed, and potential mechanical damage is avoided.

The utility model belongs to the technical field of agricultural product preservation, and particularly relates to a lotus root anti-brown spot preservation container which comprises a base, a splicing bin and a bin cover, a filling bin filled with natural antioxidants and microbial inhibitors is arranged in the splicing bin, and the lotus root anti-brown spot preservation container can inhibit the activity of phenol oxidase, prevent brown spots, inhibit the growth of mould and bacteria and delay lotus root decay; a sponge mat is arranged at the bottom of the container to absorb excessive moisture, keep dry and further prevent mould breeding; a microporous membrane is arranged between the splicing bin and the bin cover, gas exchange is allowed, microorganisms are prevented from entering, the concentration of oxygen and the concentration of carbon dioxide are controlled, and the preservation effect is enhanced; the quick-release lock catch structural design enables the container to be mounted and dismounted more conveniently and quickly, the air holes are formed in the partition pieces, air circulation is ensured, a suitable storage environment is provided, and the overall design is efficient, environmentally friendly and easy and convenient to operate.

The utility model relates to the field of coal mine dust removal equipment, in particular to a pneumatic wet dust remover. The wet-type dust removal device comprises a dust removal cylinder with two open ends and a wet-type dust removal assembly located in the dust removal cylinder. The wet-type dust removal assembly is provided with a spray head and fan blades, the fan blades are driven to rotate to generate air flow by taking inlet and outlet air as power, and meanwhile, the air flow is linked with water drops sprayed by the spray head to wet and collect dust. The wet-type dust removal assembly is arranged, kinetic energy is provided through the pneumatic motor, and the fan blades are driven to rotate. The fan blades rotate to generate a negative pressure environment, and dust is sucked into the dust removal cylinder. And meanwhile, the underground water filtered by the filter is sprayed out after being atomized by the spray head to humidify the sucked dust. Through wind-water linkage, the contact volume of wind and water and coal dust is increased, and the dust falling efficiency is improved.

The utility model relates to a multifunctional waste breaking machine, which belongs to the technical field of waste breaking machines and comprises a rack and a rotary drum mounted in the rack and rotatably connected with the rack, a plurality of cutting and crushing structures are arranged on the rotary drum and are spirally distributed at intervals along the axial direction of the rotary drum, and a chain group is arranged below the tail of the rack. A roller driving device is arranged above the tail of the rack, the driving device is connected with one end of the roller through a conveying belt, the structure is simple, operation is easy, maintenance is convenient, the roller and the driving device are in belt transmission, and mechanical damage such as oil pipe burst, motor damage and tooth hitting caused by rigid transmission such as chain transmission and gear transmission is avoided; the chain group can effectively prevent earth broken stones, timbers and the like from splashing to block sight, and people are prevented from being hurt; and through upper connection, the device can be matched with different loaders and can also be installed on other mechanical equipment, the universality is high, and flexible operation is achieved.

This invention discloses a wear-resistant insulated medium-voltage power cable for use in the cable industry. This cable incorporates a follow-up anti-wear cable sleeve on top of an existing cable. This sleeve restricts the cable's extension and retraction within a certain range. Compared to the fixed-point fixing method in existing technologies, this effectively prevents cable wear caused by the movement of electrical equipment. The follow-up anti-wear cable sleeves, through an interlocking structure, allow the cable to extend and retract with the movement of the electrical equipment, avoiding direct contact between the cable and fixed points, thus effectively preventing wear at those points. Furthermore, in vibrating working environments, the cable's extension and retraction effectively improves environmental adaptability and extends its service life. The follow-up anti-wear cable sleeves can also automatically release after the cable is subjected to significant drag force, effectively preventing mechanical damage. Additionally, the follow-up anti-wear cable sleeves provide early warning and buffer against cable torsion, effectively improving cable safety.

The utility model discloses a kind of optical receiving assembly and optical module, the optical receiving assembly includes: PCB board, receiving end FA, lens array, PD array and receiving end FA gasket;Wherein, receiving end FA gasket is set on PCB board, and receiving end FA is set on receiving end FA gasket;The light outlet end of receiving end FA is equipped with reflection bevel, and lens array is set in reflection bevel downside;Signal light received by receiving end FA is reflected to lens array by reflection bevel, and enters PD array by lens array.The optical receiving assembly of the utility model adds receiving end FA gasket, receiving end FA is elevated by receiving end FA gasket, can promote the operation space when coupling, effectively reduce the damage risk of element such as receiving end FA and PD array in coupling process;In addition, the light outlet end of receiving end FA is equipped with reflection bevel, and lens array is set in reflection bevel downside, can be received signal light reflection to lens array and shape, make signal light converge on the photosensitive surface of PD array, promote coupling efficiency.

The invention discloses a cable laying device, which is applied to a ship and is used for protecting a cable, the cable laying device comprises a groove body and a cover plate, the groove body is internally provided with a cable groove, the top of the groove body is provided with an opening, the opening is communicated with the cable groove, the cable is placed in the cable groove through the opening, and the cover plate covers the cable groove. The cover plate is detachably connected to the opening. By adopting the structure, the cover plate is detachably connected to the opening of the groove body, so that the cable laying device can be conveniently disassembled to open the cable laying device to carry out overhaul or later maintenance on the cable laid inside, the problem that the cable is difficult to overhaul or later maintenance by adopting a closed protection measure is avoided, the cable maintenance efficiency is improved, and the maintenance cost is reduced. Good conductivity of the cable can be ensured, so that the operation efficiency and performance of a ship are improved.

A method for withering tea leaves, using withering equipment including a fan (2), a temperature sensor (3), a control box (5), a heating tube (7), and a frame (8), wherein a perforated plate (1) is arranged in the frame (8) to form a trough, and a guide plate (4) is set below the perforated plate (1). The method includes the following steps: starting the control box (5) and measuring and determining the correspondence between the wind speed and the frequency of the fan (2) in segments; spreading the fresh tea leaves flat on the perforated plate (1), controlling the thickness of the spread tea leaves to ensure uniform spreading; setting the direction and wind speed parameters of the fan (2), and starting the fan (2) and the heating tube (7); repeating the blowing process of the fan (2) and the heating process of the heating tube (7) according to the direction and wind speed parameters set in step three until withering is completed. This achieves parameterized and precise control of the withering process.

The utility model relates to the technical field of aerial cameras, in particular to a large aerial camera platform ball cover disassembling tool which comprises a handle and two tensioning installation mechanisms used for installing the handle in counter bores of an external ball cover. Wherein each tensioning mounting mechanism comprises a tensioning sleeve, a tensioning mandrel, a locking nut and a dismounting tool; the tensioning mandrel stretches into the counter bore, the tensioning sleeve stretches into the counter bore and is matched with the locking nut to enable the residual space of the counter bore to be fully expanded, the two ends of the handle are arranged on the tensioning sleeve in a sleeving mode, the handle is clamped and fixed to the tensioning sleeve through the locking nut, and therefore the ball cover can be rapidly installed on the surface of the ball cover and carried and lifted. And the disassembling tool can be quickly disassembled from the surface of the ball cover without damaging the ball cover, so that the overall practicability of the tool and the safety in the carrying process are improved.

The utility model provides a hoisting device for heavy packaging, and relates to the technical field of hoisting, the hoisting device comprises a supporting frame, two X-axis toothed rails are symmetrically arranged at the top of the supporting frame, a sliding plate is slidably mounted between the two X-axis toothed rails, a Y-axis toothed rail is arranged on the sliding plate, and a retracting and releasing device is slidably mounted on the sliding plate; a lifting rope is arranged at the bottom of the winding and unwinding device, and a lifting hook is fixedly installed at the end of the lifting rope. And any one of the X-axis toothed rail and the Y-axis toothed rail is provided with a driving assembly. In order to solve the problem that mechanical damage is caused to a hoisting device by swinging when the heavy package is hoisted due to the fact that whether the winding device can not be accurately located over the heavy package or not, a driving assembly and a locking assembly are arranged, so that the winding device can move to the position over the heavy package in advance when the heavy package is hoisted, and the heavy package is prevented from being damaged. And then the heavy package is hoisted and carried.

The utility model discloses a nitrogen oxygen sensor control box, which comprises a control box main body, a waterproof breathable cover and a shielding cover, a cavity is arranged in the control box main body, and the shielding cover is hermetically connected to an opening of the cavity; a cavity is formed in the control box body, a first opening end and an air hole communicated with the cavity are formed in the control box body, the first opening end and the cavity are arranged in a separated mode, the first opening end is communicated with the air hole, and the waterproof ventilation cover is connected to the first opening end in a sealed mode. According to the nitrogen-oxygen sensor control box provided by the utility model, internal heat can be dissipated into external air when the internal temperature of the control box changes.

This invention provides an adaptive inflation control method and system for reusable liquid rocket cylinders. The adaptive inflation control method for reusable liquid rocket cylinders includes: automatically matching corresponding inflation parameters and safety thresholds based on acquired data from the onboard cylinders; performing a self-check on the ground-based gas supply system and establishing a rocket-ground safety interlock after the self-check passes; and performing segmented inflation control based on the matched inflation parameters and safety thresholds. The segmented control includes: initially inflating the cylinder at a preset constant flow rate or pressure; after the pressure reaches a first preset safety threshold, inflating at a first set flow rate or pressure; after the pressure reaches a second preset safety threshold, gradually reducing the inflation flow rate or pressure to smoothly approach the target pressure; and when the cylinder pressure approaches the target pressure, replenishing the cylinder with a second set flow rate to the target pressure and then closing the inflation valve. This application achieves the goal of improving inflation efficiency and lifespan.

The utility model discloses a restraining glove for promoting blood flow of an upper limb, which can restrain the hand, can fix the position and posture of the upper limb, and can promote the blood of the upper limb to flow circularly in a massage manner. According to the technical scheme, the glove is characterized by comprising a hand glove body, an upper limb glove body and a fastener, the hand glove body is fixedly connected with one end of the upper limb glove body, the hand glove body is internally communicated with the upper limb glove body, the side wall of the upper limb glove body is provided with an open groove allowing the forearm and the hand to be placed therein, the open groove is formed in the length direction of the upper limb glove body, and the fastener is arranged on the upper limb glove body. A sealing assembly is arranged at the position of the open groove, and the buckling device is arranged on the surface of the upper limb sleeve body and detachably connected to the bedrail or the bed frame. A plurality of air bags are arranged on the inner side of the upper limb sleeve body, the upper limb sleeve further comprises a control assembly used for regularly expanding or shrinking the air bags, the reciprocating massage function on the forearm is achieved through the control assembly, and the problems of discomfort caused when the upper limb is restrained and unsmooth blood flow are solved.

This invention discloses a mouse fixation device for multi-site acupuncture experiments, belonging to the field of mouse acupuncture point experiments. It consists of a support base, a telescopic support rod, and a mouse fixation assembly, which is movably connected to the support rod. The mouse fixation assembly includes a bracket and upper and lower fixation plates, which are adjustable in multiple dimensions via first and second self-locking rotating shafts. The upper and lower fixation plates close with an interference fit between fitting bosses and fitting openings. The central operating port is equipped with a rigid rubber adjustable fixing grid, which, along with a lever, can avoid acupuncture points. The lower fixation plate grid has adhesive straps corresponding to the mouse's limbs and head, with pre-reserved gaps between the plates. A suction cup is provided at the bottom of the support base to stabilize the device. This device achieves double secure fixation of the mouse, with flexible and adjustable operating angles, avoiding acupuncture point obstruction, protecting the mouse from mechanical damage, improving the accuracy and efficiency of acupuncture experiments, and adapting to the needs of multi-site acupuncture experiments on mice.

The utility model relates to the technical field of electric coagulation haemostatic forceps, and discloses a miniature electric coagulation haemostatic forceps for animal test surgery, which comprises two connecting rods, the left sides of the two connecting rods are fixedly connected with extension rods, the exteriors of the two extension rods are connected with sliding sleeves in a sliding manner, elastic assemblies are arranged in the extension rods, and the elastic assemblies are connected with the sliding sleeves in a sliding manner. A sliding groove is formed in the left side of the interior of the extension rod, a hemisphere is fixedly connected to the bottom of the elastic assembly, a plurality of clamping grooves are formed in the bottom side of the interior of the sliding sleeve, an outer clamp body is fixedly connected to the left side of one connecting rod, and an inner clamp body is fixedly connected to the left side of the other connecting rod. According to the haemostatic forceps, after the hemisphere moves to the designated clamping groove position, the spring releases elastic potential energy, the hemisphere is pushed to reset and be clamped in the clamping groove in the bottom of the sliding sleeve, and therefore the length of the haemostatic forceps is locked. The length of the hemostatic forceps can be flexibly adjusted according to the requirements of different operation scenes, and a doctor can operate and use the hemostatic forceps conveniently.

The utility model discloses an explosion-proof servo electric cylinder which comprises a base, a cylinder body is installed on the base, a servo motor is arranged on one side of the cylinder body, the servo motor is installed on the base, a driving box is arranged at the bottom of the base, the bottom end of a rotating lead screw in the cylinder body is connected with the driving box, and a lead screw sleeve is matched with the rotating lead screw in a threaded mode. A mounting plate is arranged at the top of the screw rod sleeve, a side mounting plate is fixed to the outer side of the cylinder body, a temperature and air pressure detector is arranged in the side mounting plate, a detection rod at the bottom of the temperature and air pressure detector extends into the processing box, a pressure measuring bin and a heat dissipation bin are arranged in the processing box, a heat dissipation mechanism is arranged in the heat dissipation bin, and the heat dissipation bin and the pressure measuring bin are both communicated with the interior of the cylinder body; the device has the advantages that the servo motor and the cylinder body can be independently cooled, the stability of the servo motor and the cylinder body is guaranteed, meanwhile, the strength of the lead screw sleeve is improved, the service life of the lead screw sleeve is prolonged, temperature and air pressure detection is continuously conducted on the interior of the cylinder body, and safety is greatly improved.

The invention discloses a method and a device for picking and placing an ultrathin substrate chip, aiming at the ultrathin chip with the thickness of several microns, a volatile alcohol solution is dipped on the surface of a tip object, and the holding force in the chip picking process is provided by utilizing the principle of liquid surface tension; a tip object holding the chip through surface tension is controlled under a microscope, the tip object is close to the surface of a carrier needing to be placed, and the tension effect between the bottom of the chip and the carrier is provided through rapid spreading of the solution on the surface of the carrier; slowly lifting the tip object to realize that the ultrathin substrate chip is placed on the surface of the carrier; and finally, slowly heating to mildly dry volatile alcohols on the surface of the chip and between the bottom of the chip and the carrier so as to form effective chip placement. According to the method, mechanical damage to the ultrathin chip with only several micrometers in the mechanical picking and placing process can be avoided, and a feasible method is provided for effective placement of effective positions of the ultrathin substrate chip and the packaging carrier.