1991results about How to "Improve fit" patented technology

The invention provides welding seam nondestructive testing equipment and method for a high-precision pressure vessel, and relates to the technical field of welding seam detection, the welding seam nondestructive testing equipment comprises a flaw detector main body, a data line, a probe and a fixed ring, two ends of the data line are respectively connected with the flaw detector main body and the probe, a movable frame is slidably mounted on one side of the fixed ring, and an adjustable track is mounted on the fixed ring. According to the nondestructive testing equipment and method for the welding seam of the high-precision pressure container, through the arrangement of the flaw detector main body, the data line, the probe, the fixed ring, the movable frame, the movable frame, the mounting frame, the adjustable track and the buffer structure, the wavelength of the adjustable track can be adjusted according to the width of the welding seam on the pressure container, so that the welding seam area is better covered, and the welding seam detection accuracy is improved. The device is simple and convenient to operate, in addition, it can be ensured that the probe can be better attached to a weld joint to conduct scanning operation, in the scanning process, the effect of buffering and protecting the external force borne by the probe can be well achieved, and damage to the probe is reduced.

The invention provides an automatic positioning and cleaning device for detecting the strength of a concrete test block, the automatic positioning and cleaning device comprises a base, the top of the base is fixedly provided with vertical support rods in a rectangular array, the tops of the four support rods are fixedly provided with a mounting plate, and the mounting plate is fixedly provided with a vertical electric cylinder; a piston rod of the electric cylinder is fixedly provided with a mounting block, and the bottom of the mounting block is provided with a pressure detection assembly. According to the device, the detection position of the concrete test block is automatically positioned, so that a worker does not need to manually place the concrete test block at the center of the top of the lower pressing block, and the device is relatively convenient; when concrete is unqualified and strength detection is carried out on the concrete, a moving mechanism is controlled to act to enable a connecting block to be far away from a fixing block and enable a cleaning shell to move to one side, far away from a supporting plate, of a lower pressing block, so that fragments at the top of the lower pressing block can be cleaned through two cleaning brushes, and workers do not need to manually clean the fragments; and the workload of workers is reduced.

The invention discloses a multifunctional electronic product screen protective film and a preparation method thereof. The protective film comprises a modified base film and a multifunctional composite layer compounded on the surface of the modified base film, the multifunctional composite layer comprises an elastic buffer layer and a self-repairing layer which are sequentially arranged from inside to outside; wherein the elastic buffer layer is an elastic buffer layer with gradient density; the elastic buffer layer comprises the following components in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 15-25 parts of hollow glass microspheres, 10-15 parts of polyethylene glycol and 3-6 parts of an isocyanate cross-linking agent; the self-repairing layer comprises the following components in parts by weight: 100 parts of a dynamic reversible covalent bond polymer, 30-40 parts of phase change material microcapsules, 10-15 parts of nano cellulose, 5-8 parts of a near-infrared photosensitive initiator and 2-4 parts of an antioxidant. Compared with the prior art, the protective film provided by the invention has excellent scratch self-repairing performance, good adhesion and high anti-explosion screen performance.

The invention provides a cylindrical lithium battery. The sum of the areas of all second holes of a positive collector plate in the cylindrical lithium battery is 0.9-1.5 times of the area of a first hole, a fusing groove is formed in a tail body part of the positive collector plate, and the minimum sectional area S2 of the tail body part at the position of the fusing groove is 45%-65% of the overall sectional area S1 of the tail body part; a negative collector plate in the cylindrical lithium battery is provided with a heightening platform with a flat surface, the diameter D8 of the heightening platform is 28%-38% of the diameter D7 of the negative collector plate, and the height difference H4 between the surface of the heightening platform and the surface of the first side is 18%-30% of the thickness T4 of the negative collector plate. By reasonably designing the necking part, the positive collector plate and the negative collector plate, the cylindrical lithium battery disclosed by the invention is balanced in multiple aspects of liquid injection performance, safety, weldability and the like, and the battery performance can be improved.

The invention belongs to the technical field of medical instruments, and particularly relates to a dense net support. The dense net support comprises a front fixing section, a blocking section and a rear fixing section, and the blocking section is located between the front fixing section and the rear fixing section. The plugging section is connected with the front fixing section through a front connecting piece, and the plugging section is connected with the rear fixing section through a rear connecting piece; the plugging section is used for plugging an aneurysm position of a blood vessel, the plugging section sequentially comprises an inner layer part, a middle layer part and an outer layer part from inside to outside, the inner layer part adopts an inner layer metal stent, and the outer layer part adopts an outer layer metal stent. The dense net stent can adjust hemodynamics more accurately, and it is ensured that the blood flow of healthy blood vessels is not affected while the aneurysm is closed; the sealing effect of the aneurysm is ensured, and thrombosis is well promoted, so that blocking and healing of the aneurysm are promoted; and the endothelialization process of the stent is facilitated, so that the success rate of fusing the stent into the blood vessel is improved, the effect of completely sealing the aneurysm opening is achieved, and the recurrence risk is reduced.

The invention discloses a semi-automatic lining plate butt-welding machine, relates to the technical field of butt-welding machines, and aims to solve the problems that a welding head at a welding position is adhered to a lining plate due to contact between the welding head and the lining plate, and the lining plate is pulled and damaged due to adhesion when the welding head is lifted. According to the semi-automatic lining plate butt-welding machine, a side pressing block is matched with an inner cushion block, a lining plate and a mother plate are pressed tightly before welding, the lining plate and the mother plate are made to be attached tightly, pseudo soldering caused by low attaching degree during welding is avoided, meanwhile, after welding is completed, the lining plate and the mother plate continue to be pressed tightly when a pressure welding head is lifted through deformation compression of an elastic cushion block, and the welding efficiency is improved. The lining plate is prevented from being damaged due to the fact that the lining plate is pulled along with the movement of the welding head when adhesion occurs at the contact position of the welding head and the lining plate.

The invention relates to the technical field of new energy modeling, in particular to a wind and light typical scene generation method and device.The method comprises the steps that firstly, wind and light historical output data of a target wind and light power station are obtained, and a wind and light energy output edge distribution function of the target wind and light power station is calculated based on the wind and light historical output data; based on the wind and light energy output edge distribution function, using a mixed Copula function to construct a wind and light output joint distribution model; carrying out sampling and splicing processing on the joint distribution model of the wind and light output to generate a wind and light typical scene set; and finally, calculating the occurrence probability of each target scene in the wind-light typical scene set, calculating the correlation between the target scene and the wind-light historical output data, and selecting a final wind-light typical scene based on the occurrence probability and the correlation coefficient. The deviation between the generated wind and light typical scene and the actual situation is small, consideration on the correlation of the original wind and light data is combined, and the operation efficiency and safety of the power system are ensured.

The invention discloses a mattress roadway stacking machine for bamboo mattress production and processing, and relates to the technical field of automatic storage and logistics, the mattress roadway stacking machine comprises a frame, a base plate, a conveying belt, a mattress, a stacking frame and a fixing frame, a stacking device is arranged in the stacking frame, a conveying device is arranged above the conveying belt, and the fixing frame is arranged above the conveying belt. An auxiliary device is arranged above the fixing frame, a base plate is pushed to move along a sliding rail rod through a servo motor, a conveying belt and a push plate, mattresses can be more easily aligned and stacked in the follow-up stacking process through the base plate, the base plate is moved upwards through an air cylinder and a top plate, the base plate is placed at the top of the placing frame through the placing frame and a check rod, and therefore the mattresses can be conveniently stacked. Stacking of the base plate is completed at the moment, stacking of the base plate is gradually conducted upwards, stacking of the mattresses can be more stable, the collapse risk is reduced, storage and management of the mattresses can be more orderly through the stacking mode, and the mattresses are convenient to check and take for use.

The invention discloses high-scratch-resistance water-based double-component matte solid color finish paint which comprises a component I and a component II, and the component I is prepared from the following raw materials in percentage by weight: 50-60% of matrix resin, 0.1-1% of a defoaming agent, 1-5% of a coalescing agent, 0.1-0.5% of a wetting dispersant, 1-5% of a delustering agent, 0.1-1% of a thickening agent, 20-40% of color paste, 0.1-0.5% of a mildew preventive and the balance of water, the component II at least comprises a curing agent. The combination of the water-based matte polyurethane emulsion and the water-based hydroxyl acrylic acid dispersion is adopted as matrix resin, and a prepared paint film has low glossiness, is high in drying speed on the surface of woodware, good in adhesive force with the woodware and excellent in scratch resistance and has self-extinction performance.

The invention provides a display screen and electronic equipment. The display screen comprises a display module and a display module, wherein the display module comprises a cambered surface section and a plane section; the supporting plate comprises a first supporting section, a second supporting section and a third supporting section, the second supporting section is located between the first supporting section and the third supporting section, the first supporting section is attached to the plane section, the second supporting section, the third supporting section and a connecting gap between the second supporting section and the third supporting section form a bent section, and the bent section is attached to the cambered surface section; the surface of the second supporting section is provided with a concave area, the hardness of the second supporting section is smaller than that of the first supporting section, and the hardness of the third supporting section is smaller than that of the first supporting section or the second supporting section. The second supporting section is provided with a concave area, so that the hardness of the second supporting section is smaller than that of the first supporting section, and bending of the second supporting section is facilitated. The hardness of the third supporting section is smaller than that of the first supporting section or the second supporting section, bending of the third supporting section is facilitated, attaching of the bent section and the cambered surface section is facilitated, and the problem that the supporting plate and the display module are prone to falling off is solved.

The utility model relates to the technical field of pipeline cleaning equipment, and particularly discloses an adjustable pipeline cleaning robot which comprises a robot body. An air cylinder is installed on one side of the robot body, one side of the air cylinder is connected with a hydraulic rod, a push block is fixed to one end of the hydraulic rod, a plurality of through grooves are formed in the robot body, fixing plates are arranged in the through grooves and fixedly connected with the interior of the robot body, and sliding rods are slidably connected to the fixing plates. A driving mechanism is fixed at one end of the sliding rod, and a plurality of rollers are arranged on the driving mechanism; an electric rotating shaft is connected to one end of the robot body, a rotating head is fixed to one end of the electric rotating shaft, a plurality of connecting plates are fixed to the side face of the rotating head, a supporting rod is rotationally connected to one end of each connecting plate, a cleaning head is fixed to one end of each supporting rod, and a plurality of electric telescopic rods are installed on the side face of the rotating head. One end of the electric telescopic rod is connected with the supporting rod in a sliding mode.

The invention discloses a fishery water body environment monitoring equipment control method, and relates to the technical field of equipment control, and the method comprises the steps: obtaining a first-stage monitoring region and a second-stage monitoring region; obtaining a first-stage monitoring equipment layout array and a second-stage monitoring equipment layout array; setting a monitoring bandwidth; obtaining a primary monitoring index set sequence and a secondary monitoring index set sequence; obtaining a primary monitoring area water body state coefficient and a secondary monitoring area water body state coefficient; and carrying out water body environment monitoring on the primary monitoring area and the secondary monitoring area according to the adjusted monitoring bandwidth. The technical problems that in the prior art, the fitting degree of fishery water environment monitoring equipment control and the actual water environment condition is low, and the control reliability is poor are solved, and the technical effects that the fitting degree of the monitoring bandwidth of the water environment monitoring equipment and the actual condition is improved, and the equipment control accuracy is improved are achieved.

The invention discloses a honeycomb type combined loading pad and a method. Comprising a soft double-bottom honeycomb bag (1) and a U-shaped elastic cushion block (2), the soft double-bottom honeycomb bag (1) comprises an upper bonding surface (4) and a lower bonding surface (5) which are arranged in parallel, and a pair of honeycomb cavities (6) are transversely arranged between the upper bonding surface and the lower bonding surface; and two U-shaped arms of the U-shaped elastic cushion block (2) are respectively inserted into the corresponding honeycomb cavities (6). The device is high in universality and low in use cost.

The present invention discloses a transcranial magnetic stimulator, which belongs to the technical field of medical devices. It includes: a circular hole is provided on a substrate; a first rotating ring is rotatably installed in the circular hole of the substrate; a circular hole arranged eccentrically relative to the axis of the first rotating ring is provided on the first rotating ring; a first driving mechanism is installed on the substrate, which is used to control the first rotating ring to rotate around the circular hole of the substrate; a second rotating ring is rotatably installed in the circular hole of the first rotating ring; a circular hole arranged eccentrically relative to the axis of the second rotating ring is provided on the second rotating ring; a second driving mechanism is installed on the first rotating ring, which is used to control the second rotating ring to rotate around the circular hole of the first rotating ring; a shaft cylinder is rotatably installed in the circular hole of the second rotating ring; a magnetic head is installed at the lower end of the shaft cylinder. The present invention realizes the flexible movement of the magnetic head on a two-dimensional plane through a two-stage rotating ring, which greatly increases the flexibility and accuracy during treatment, helps to achieve more accurate and personalized treatment, and improves the treatment effect.

The invention provides a pressure sore detection method and system based on a pressure sensor. The method comprises the following steps: acquiring pressure data of a to-be-detected part of a user through the pressure sensor; preprocessing the collected pressure data to form a pressure matrix; extracting at least one basic pressure characteristic value based on the pressure matrix; calculating characteristic values of any basic pressure characteristic value in a time domain, a frequency domain and a time-frequency domain, and constructing a multi-level pressure characteristic matrix; and inputting the multi-level pressure feature matrix into a pressure sore state detection model to obtain the pressure sore state of the user, through the method, pressure data acquisition can be performed on the body part of the user in a real-time and non-inductive manner, pressure sore detection is performed, autonomous monitoring of the body part of the user is realized by using an artificial intelligence algorithm, and the user experience is improved. The detection process is flexible and efficient, and the privacy of the user is effectively protected.

The invention discloses a protective film pressing device and a use method thereof, and belongs to the technical field of protective film processing, the protective film pressing device comprises a cabinet placed above the ground, an unwinding roller is rotatably mounted on the upper surface of the left end of the cabinet, and a winding roller is rotatably mounted on the upper surface of the right end of the cabinet; a fixing frame is fixedly installed on the upper surface of the machine cabinet, a movable plate is arranged above the fixing frame, an air conveying assembly is connected between the fixing frame and the movable plate, a rotating frame is elastically and rotationally connected to the lower portion of the movable plate through a torsional spring, and an obliquely-arranged exhaust roller is rotationally connected to the lower end of the rotating frame. And a heat generation assembly for heating air is arranged on the inner side of the exhaust roller. According to the protective film pressing device and the using method thereof, the exhausting and pressing effects on the protective film can be improved through vibration, gas can be automatically conveyed to heat the protective film in the pressing process, and the exhausting and cleaning effects of the protective film are further improved.

The invention discloses a liquid metal-hydrogel composite radiation protection material and a preparation method and application thereof.The preparation method comprises the steps that indium, tin and bismuth are sequentially put into a flask from low melting point to high melting point to be mixed, and glycerin is added for immersion; placing the mixture in an argon atmosphere, and stirring by using a heating type magnetic stirrer; taking out the spherical liquid metal particles from the glycerol, and finally washing and drying to obtain liquid metal alloy particles; preparing a PVA (polyvinyl alcohol)-H2O solution with the mass fraction of 15% and a PVA-DMSO (dimethyl sulfoxide) solution with the mass fraction of 15%; and a PVA-H2O solution, a PVA-DMSO solution and the liquid metal alloy particles are stirred and mixed according to the mass ratio, the mixed solution is subjected to ultrasonic treatment and then poured into a mold to be frozen into gel, and the liquid metal-hydrogel composite material is obtained. By combining the advantages of the liquid metal and the hydrogel, excellent biocompatibility, adjustable mechanical property and efficient radiation shielding capability are realized, and the hydrogel can be used as a novel lead-free radiation protection material.

The invention relates to the technical field of sweater model simulation, in particular to a model simulation method and system for digital spinning of sweaters. The method comprises the following steps: obtaining a to-be-designed user omni-directional image, textile raw material multi-scale parameters and a textile process log; analyzing geometric morphology parameters of the user omnibearing image to be designed, performing three-dimensional geometric point cloud modeling, and constructing a user three-dimensional morphology model; performing physical characteristic parameter analysis on the multi-scale parameters of the textile raw materials, and performing deep parameter characteristic mining to obtain multi-scale state characteristics of the textile raw materials; and performing external mechanical deformation response analysis and internal fiber elastic response analysis based on the multi-scale state characteristics of the textile raw materials to generate external mechanical deformation response data of the textile raw materials and internal fiber elastic response characteristics of the textile raw materials. According to the invention, personalized and visual user try-on simulation is realized through sweater model simulation, and the production efficiency of spinning sweaters is improved.

The invention discloses adjustable bobbin packaging equipment for wrap yarn processing, and relates to the technical field of wrap yarn processing, in particular to the adjustable bobbin packaging equipment for wrap yarn processing, which comprises a conveying mechanism, an adjusting mechanism is mounted at the top of the conveying mechanism, and a turnover mechanism is mounted at one end of the conveying mechanism. A packaging mechanism is installed at the bottom of the conveying mechanism, and a heat sealing mechanism is arranged at one end of the packaging mechanism. According to the adjustable bobbin packaging equipment for wrap yarn processing, the adjusting mechanism is arranged in the adjustable bobbin packaging equipment to adjust the position of a bobbin, the bobbin is prevented from deviating during packaging, the stability of wrap yarn processing and packaging is improved, and the clamping arms capable of being overturned and adjusted are arranged in the adjustable bobbin packaging equipment to adjust and clamp the large and small heads of the bobbin, so that the working efficiency is improved. And meanwhile, an inductive probe is arranged to induce the position of the bobbin, corresponding packaging operation can be conveniently conducted on all assemblies, manpower input is reduced, and the wrap yarn processing effect is improved.

The invention relates to the technical field of exoskeletons, in particular to a high-degree-of-freedom light lower limb assisting exoskeleton. The invention provides a high-degree-of-freedom light lower limb assisting exoskeleton. The high-degree-of-freedom light lower limb assisting exoskeleton comprises a back assembly, a waist assembly, hip joint motors, thigh assemblies, knee joint motors, shank assemblies and ankle joint and foot assemblies which are sequentially connected. Wherein the thigh assembly comprises a hip joint motor connecting piece, a thigh rod and a knee joint motor connecting piece which are connected in sequence, and the end, close to the hip joint motor connecting piece, of the thigh rod is hinged to the hip joint motor connecting piece through a first hinge shaft. The multi-degree-of-freedom hip joint mechanism and the multi-degree-of-freedom knee joint mechanism are adopted, so that the exoskeleton can better coincide with contour curves of all parts of a human body and better adapt to complex movement of human joints, and the problems that the exoskeleton is poor in wearing comfort, effective assisting force is lost and the like due to man-machine discordance are solved.

The invention discloses a bearing ring polishing device for bearing production and machining, and relates to the technical field of bearing production and machining. A machine cabinet assembly is arranged at the bottom of the top base, a grinding table is arranged in the center of the top of the top base, supporting columns are arranged at the corners of the top of the top base, a circular plate is arranged at the tops of the supporting columns, a motor is arranged at the top of the circular plate, and an electric telescopic rod is arranged at the bottom of the circular plate. Bearing rings of different specifications and diameters are clamped in a self-adaptive mode through the L-shaped arc top plate, meanwhile, the friction force is gradually increased due to the fact that the guide arc plate and the rubber soft block continuously go deep downwards along with the bearing rings, and the stability of the bearing rings on the top of the grinding table is effectively improved; and the situation that the bearing ring shakes due to high-speed rotation of the grinding disc during grinding, the preset grinding direction of the bearing ring deviates, and the phenomenon that the grinding thickness of the bearing ring is not uniform is avoided.

The invention discloses a special-shaped structure heat-proof layer forming method, and belongs to the technical field of composite material forming. The forming method comprises the following steps: preparing a first prepreg, cutting the first prepreg according to a first angle to obtain an inner-layer prepreg block, and cutting the first prepreg according to a second angle to obtain an outer-layer prepreg block; the inner-layer prepreg blocks are laid on the force bearing body layer by layer in a warp and weft staggered mode, the outer-layer prepreg blocks are laid on the inner-layer prepreg blocks layer by layer in a warp and weft staggered mode, and a large-area heat-proof layer laying layer set is obtained; preparing to obtain an edge heat-proof layer blank body; cutting off a thin-wall area on the edge heat-proof layer blank body; placing the edge heat-proof layer blank body after the thin-wall area is cut off on a mould pressing tool, laying a second prepreg in the area of the mould pressing tool corresponding to the cut-off part, and pre-pressing to obtain an edge heat-proof layer composite blank body; embedding the edge heat-proof layer composite blank body into the prepreg laying layer group to obtain a heat-proof layer blank body with a special-shaped structure; and performing curing treatment on the heat-proof layer blank with the special-shaped structure to obtain the heat-proof layer with the special-shaped structure.

The invention relates to a remote visual remote-control automatic inspection device for highway maintenance operation, and relates to the technical field of intelligent monitoring of traffic safety facilities, and the remote visual remote-control automatic inspection device comprises a rack which is used for being hung on a guardrail of a high highway, the rack is provided with a camera shooting system and a sensor system which are used for data acquisition and transmission, and further comprises a data processing and analyzing system and an alarm and notification system which are connected to the camera shooting system; the anti-falling walking mechanism is arranged on the rack and comprises a walking assembly and a strong wind prevention assembly, the anti-falling walking mechanism has a walking inspection mode and a strong wind prevention mode, and when the anti-falling walking mechanism is in the walking inspection mode, the walking assembly is started; and when the anti-falling walking mechanism is in the strong wind prevention mode, the strong wind prevention assembly is started. The method has the effects of carrying out comprehensive coverage monitoring in a certain span region and improving the inspection efficiency and the inspection quality of road inspection.

The invention relates to the technical field of solar cells, and mainly provides a photovoltaic module and a photovoltaic system. The photovoltaic module comprises at least two groups of series battery modules, a first welding strip, a second welding strip and a bus bar, wherein each group of series battery modules comprises at least two series battery pieces; one battery piece in one group of series battery components is partially overlapped with one battery piece in the adjacent group of series battery components; the bus bar is arranged on the overlapped part of the two overlapped battery pieces; a through hole is formed in the bus bar and penetrates through the thickness direction of the bus bar; the first welding strip penetrates through the through hole and is electrically connected with the bus bar, part of the first welding strip is located above the bus bar, and part of the first welding strip is located below the bus bar; and the second welding strip is insulated from the bus bar through the insulating layer. According to the photovoltaic module in the technical scheme, the current transmission efficiency can be improved, the welding quality can be ensured, and the bonding firmness of the welding strip is improved.

The utility model relates to the technical field of breather valves, in particular to a diaphragm type sand-proof anti-freezing fire-retardant integrated breather valve which comprises a valve seat covering a tank opening of a storage tank in a sealing mode, an air inlet hole is formed in the valve seat in a penetrating mode, a supporting ring is arranged on the outer side of the air inlet hole in a surrounding mode, and an annular groove is formed in the upper annular face of the supporting ring in a concave mode. A groove cavity of the annular groove is communicated with a tank cavity of the storage tank through an air guide pipe; a valve cover is installed on the valve seat, a breathing film capable of covering the air inlet hole and the annular groove is arranged between the valve cover and the valve seat in a clamped mode, and the air inlet end of the air inlet hole is provided with an inverted conical filter screen in a communicating mode so as to complete the breathing action capable of preventing sand in a matched mode. According to the utility model, the conical filter screen is communicated and mounted at the air inlet, so that impurities such as sand and dust are effectively prevented from entering the breather valve, and the cleanness and normal work of the valve body are ensured. Meanwhile, due to the design of the inverted conical filter screen, the filtering area is increased, the filtering efficiency is improved, sand and dust can slide down and be cleaned conveniently, and the maintenance cost is reduced.

The invention provides a balloon catheter suitable for long vasculopathy, and relates to the technical field of medical instruments. The first balloon is arranged at the far end of the catheter body; the diameter of the near end of the first balloon is larger than that of the far end of the first balloon. A through inner cavity is formed in the middle of the catheter body, and a communicating channel communicating the first balloon with the inner cavity is formed in the side wall of the catheter body. By arranging the first balloon and the second balloon, the first balloon extrudes the second balloon after expanding, so that a contrast agent in the second balloon is gradually extruded out, the second balloon deforms, and the deformed second balloon is better attached to the narrow part of a blood vessel and can better adapt to the change of the inner diameter of a channel at a longer blood vessel.

The utility model provides a light shielding pipe polishing treatment device, and belongs to the field of light shielding pipes. The problem that the ultra-long and small-diameter light shielding pipe is difficult to polish is solved. The light shielding pipe fixing mechanism comprises a fastening assembly which is used for fixing a light shielding pipe; the grinding mechanism comprises a driver, a rod piece connected to the rotating end of the driver and a grinding head assembly connected to the far end of the rod piece, the diameter of the grinding head assembly is larger than the inner diameter of the light shielding pipe, and the grinding head assembly comprises a flexible layer capable of being compressed in the radial direction of the light shielding pipe and a grinding layer arranged on the peripheral side of the flexible layer in a sleeving mode; the flexible layer is used for supporting the polishing layer to be attached to the inner wall of the light shielding pipe when the inner wall of the light shielding pipe is polished. The light shielding pipe polishing device is mainly used for polishing light shielding pipes.

The invention relates to the technical field of medical apparatuses and instruments, and discloses a gastroenterology department endoscope auxiliary tractor which comprises a shell, three limiting rings are fixedly connected to the inner wall of the shell, a grip is fixedly connected to the side wall of the shell, a rubber expansion block is fixedly connected to the outer wall of the grip, and a user presses an arc-surface extrusion plate to descend, so that the rubber expansion block is expanded, and the rubber expansion block is expanded. The spring plate and the bevel friction block are driven to descend, the bevel friction block is extruded, the spring plate retracts into the cambered surface extrusion plate, meanwhile, when the cambered surface extrusion plate descends, the cambered surface of the bottom of the cambered surface extrusion plate can make contact with the surface of the ball soft rod, the ball soft rod is extruded to move towards the direction of the fixing ring, the ball soft rod can extrude the clamping block, and the clamping block rotates; according to the clamping device, the clamping force can be controlled by the pressing depth of the cambered surface extrusion plate, it is ensured that the diseased region is accurately clamped, and the clamping force can be rapidly adjusted only by pressing the cambered surface extrusion plate or extruding the connecting plate.