636results about How to "Reduce accumulation" patented technology

The utility model discloses a domestic ceramic drying treatment device which comprises a drying box body. An electric heating wire is arranged in the drying box body; the placing frame is arranged in the drying box body, the placing frame comprises a rotating pipe, a plurality of supporting discs are detachably installed on the outer side of the rotating pipe, and an air blowing pipe is in threaded connection with the portion, located below the supporting discs, of the outer side of the rotating pipe; the dehumidification device has the advantages that the fan sucks air in the drying box into the dehumidification box to make contact with the metal sheets, hot air is liquefied when meeting the cold metal sheets and moisture, left on the metal sheets and condensed into water drops, the water drops move downwards along the inclined metal sheets and enter the collecting tank through the water outlet holes to be collected, and the dehumidification efficiency is high; the draught fan absorbs heat generated by air in the dehumidification box and the heating end of the semiconductor chilling plate, meanwhile, the heating box is installed at the output end of the draught fan, the extracted air is heated again through the internal electric heating wire and then fed into the transmission pipe and the rotating pipe, heat recycling is achieved, and the energy utilization efficiency is improved.

The invention discloses a segmented combined type worm grinding wheel based on spiral surface structuring and a laser finishing method, and belongs to the technical field of precise gear grinding. The working surface of the inner side of a spiral tooth groove of the worm grinding wheel at least comprises a section of structured area and a section of unstructured area in the axial direction; the structured area is provided with a crescent groove used for forming a grinding fluid storage and abrasive dust discharge channel in the grinding process. And the unstructured area keeps a continuous grinding surface and is used for finishing the surface of the machined workpiece in the structured area. According to the method, the laser processing head is controlled through multi-axis linkage to accurately describe an arc-shaped processing track in a spiral expansion coordinate system, the morphology consistency and the space precision of grooves are guaranteed, and the manufactured worm grinding wheel has good cooling, chip removal and accurate grinding performance and is suitable for high-efficiency and high-precision gear manufacturing.

This utility model relates to the field of wheat sorting technology and discloses a gravity grading and destoning machine for wheat sorting, including a sorting box, a vibrating base, a feeding assembly, and a chip removal assembly. The vibrating base is located at the bottom of the sorting box, and the feeding assembly is located at the top of the sorting box. The sorting box has two screen plates arranged vertically at intervals inside. The chip removal assembly includes a collection box fixedly installed on the back of the sorting box. A chip suction hood is fixedly installed above each screen plate inside the sorting box. A chip suction pipe is connected between the chip suction hood and the collection box. A fan is fixedly installed on one side of the collection box, and a filter screen is fixedly installed on the side of the collection box near the fan. By setting up the chip removal assembly, this utility model can remove wheat bran and other dust from wheat during the screening process, improve the sorting quality of wheat, and prevent dust from spreading into the surrounding environment and causing pollution.

This utility model relates to the field of ironmaking technology, specifically to a fluidization device for the conveying pipeline of a flue gas desulfurization silo in a hot blast stove. This device addresses the problem of poor fluidity and easy adhesion of the desulfurizing agent, preventing it from fully reacting with the waste gas and resulting in inadequate waste gas treatment. The device includes a first and second ball valve on both sides of the silo bottom, a first and second fluidizing pipe running inside the branch pipes, and a fifth and sixth ball valve outside the two branch pipes. When blockage occurs, the first and second ball valves are opened to introduce nitrogen into the bottom of the silo for the first fluidization. Then, the first and second fluidizing pipes are opened, and nitrogen is introduced for the second fluidization. The fifth and sixth ball valves are further opened to introduce nitrogen for the third fluidization. Finally, the loss-in-weight feeder is activated to feed material into the flue gas desulfurization silo through mechanical stirring, reducing material accumulation, lowering the probability of blockage, and effectively solving the problems of material buildup, blockage, and poor material flow at the silo bottom.

This utility model relates to the field of material forming and processing technology, and discloses an extrusion device for manufacturing the shell of inspection equipment. It includes a base plate, a mold first fixedly connected to the top right side of the base plate, support plates first fixedly connected to both the front and rear ends of the top right side of the base plate, a support plate second fixedly connected to the top right side of the base plate near the edge, a motor second fixedly connected to the top of the support plate second, a pinion gear fixedly connected to the top output end of the motor second, a toothed strip meshing with the outer wall of the pinion gear, and a U-shaped frame fixedly connected to the left side of the toothed strip. In this utility model, the rotation of the pinion gear driven by the motor second, and the movement of the U-shaped frame driving the movement of the mold second, enable rapid descent for compression molding, shortening the compression molding cycle. Furthermore, by using different molding dies, various profiles can be produced to meet the basic material requirements of different inspection equipment shells.

This invention belongs to the technical field of lithium battery anode materials, specifically relating to a highly conductive graphite electrode material and its preparation method. The preparation method includes: pre-dissolving sodium carboxymethyl cellulose into a gel solution, then ball-milling and mixing graphite and conductive carbon black, dispersing them together with a cobalt hexacyanorubium(II)-dodecyltungstencobalt(III) salt hybrid material and hafnium diboride nanomaterials in the gel solution, adjusting the acidity, adding styrene-butadiene rubber emulsion to obtain a uniform slurry, and then coating, drying, and compacting to obtain the anode sheet. This invention significantly improves the conductivity and structural stability of the graphite anode through the synergistic effect of the interface modification of the cobalt hexacyanorubium(II)-dodecyltungstencobalt(III) salt hybrid material and the conductive framework of the hafnium diboride nanomaterials. The process is safe and controllable, and suitable for industrial production of lithium-ion batteries.

The application discloses a kind of slimming traditional Chinese medicine composition and preparation method thereof, it is related to slimming traditional Chinese medicine technical field.Slimming traditional Chinese medicine composition includes the following weight parts of Chinese medicinal materials: 30-45 parts of raw astragalus, 10-15 parts of prepared atractylodes rhizome, 15-23 parts of cassia bark, 20-30 parts of dried tangerine or orange peel, 30-45 parts of lotus leaf, 20-30 parts of raw hawthorn, 15-23 parts of kelp, 10-15 parts of turmeric, 10-15 parts of fried Semen Raphani, 10-15 parts of raw safflower stigma.The preparation method includes the following steps: the weight parts of the above-mentioned Chinese medicinal materials are extracted by water decocting.The traditional Chinese medicine composition of the application has the effects of benefiting qi and invigorating the spleen, resolving phlegm and eliminating dampness, and is also compatible with drugs for warming kidney and assisting yang, eliminating phlegm and resolving mass, and has the combined effects of treating both symptoms and root causes, tonifying deficiency and eliminating excess, which can increase energy consumption of the body, reduce fat generation and storage to achieve the effect of weight loss.The traditional Chinese medicine composition of the application is mainly composed of food-medicines, and can be taken for a long time.

The utility model relates to the technical field of waste gas treatment, and discloses a secondary aluminum waste gas circulating spray type dust removal device which comprises a mounting shell, one side of the mounting shell is in through connection with a gas inlet pipe, the other side of the mounting shell is in through connection with an exhaust pipe, the lower surface of the mounting shell is fixedly connected with a water storage tank, and one side of the water storage tank is in through connection with a runner pipe. And one end of the circulating pipe is in through connection with a spraying pipe, the lower surface of the spraying pipe is in through connection with a spraying head, and the other side of the water storage tank is in through connection with a backflow pipe. According to the utility model, the function of backwashing the filter plate in the dust removal device is added, and the filter plate is reversely flushed by high-pressure water flow, so that accumulation of particulate matters is effectively reduced, impurities blocked in filter holes are flushed out, the blockage phenomenon of the filter plate and the filter holes is reduced, and the impurities, flushed out by the backwashing mechanism, in the filter holes are favorably scraped and discharged; the re-blocking problem caused by impurity accumulation on the surface of the filter plate is further reduced.

The utility model discloses a kind of sludge separation recycling devices, belong to sludge recycling technical field, the device includes base, filter cartridge, shaft, connecting rod and extrusion plate. Among them, filter cartridge is fixed on base, shaft is arranged inside filter cartridge, connecting rod is provided with several, all are fixed on shaft, and extrusion plate is rotatably connected on connecting rod. The inner wall surface of filter cartridge is fixed with several convex parts, extrusion plate, convex part and filter cartridge are enclosed to form extrusion cavity. The advantage of the utility model is that: extrusion plate is gradually rotated by the effect of abutting with convex part in the process of following connecting rod rotation, and gathers extrusion cavity, so that the sludge in it is extruded, so that it is extruded from the filter hole of filter cartridge, so as to improve the efficiency of sludge extrusion.

The invention discloses an application of an intestinal strain in preparation of a cholesterol-lowering product, and belongs to the technical field of microbial medicines. The intestinal bacterial strain is Oscillibacter ruminant, the viable bacteria concentration of the intestinal bacterial strain is controlled to be (4.8-5.2) * 10 < 9 > CFU / mL, the intestinal bacterial strain can be prepared into bacterial liquid, freeze-dried powder, capsules or tablets and other dosage forms, and pharmaceutically acceptable auxiliary materials such as lactose and microcrystalline cellulose can be added. According to the cholesterol-lowering product, the total cholesterol, triglyceride and low-density lipoprotein cholesterol level of an object can be remarkably reduced under the action of peste des petits ruminants, and meanwhile, the high-density lipoprotein cholesterol level is increased; in addition, abnormal blood glucose induced by high-fat diet can be improved, arterial lipid accumulation is reduced, and the plaque area proportion of atherosclerotic lesions is improved.

The utility model discloses a drum type equal shear membrane separation device, relates to liquid separation technical field, including pool body, servo motor, drum, brush and peristaltic pump, the drum is placed in the pool body and rotatingly connected, servo motor drives the drum, the outer surface of the drum is wrapped with membrane, and the membrane is arranged in the pool body. The brush is located on the side face of the rotary drum and provided with a distance adjusting mechanism, a hole is formed in the drum face of the rotary drum and communicated with the interior of the pool body, and the interior of the rotary drum is communicated with the peristaltic pump. The utility model provides a rotary drum type equal-shear membrane separation device, which combines dynamic rotation of a rotary drum with an automatic cleaning system, is adjustable and controllable in flow and rotating speed, generates uniform shear force through rotation of the rotary drum, delays membrane pollution and reduces manual intervention.

The utility model discloses an axial flow heat radiation servo motor, comprising a casing provided with a cover, the cover is provided with a plurality of air holes, and the casing is rotatably connected with a rotating shaft; the stator assembly is in a circular ring shape and is connected into the machine shell. The rotor assembly is connected to the rotating shaft, the stator assembly surrounds the rotor assembly, and an annular air gap is formed between the rotor assembly and the stator assembly; and the cooling fan comprises an end seat and a plurality of fan blades, the end seat is in a circular ring shape, the end seat is connected to the end part of the rotor assembly, all the fan blades are distributed along the circumferential surface of the end seat, the fan blades are overlapped with the air gaps, the fan blades are overlapped with the air holes, the fan blades are bent towards the extension direction of the rotating shaft, and the fan blades are in central symmetry about the rotating surface of the end seat. The heat dissipation device is compact and reliable in structure, heat dissipation cost can be effectively saved, pertinence of fan blade operation heat dissipation is high, the energy utilization rate is high, heat dissipation efficiency is high, operation stability is high, and stable heat dissipation under the bi-directional rotation working condition can be guaranteed.

The utility model discloses annealing equipment for stainless steel plate production, which comprises a box body, a door plate arranged on one side of the box body, a cooling assembly arranged in the box body, a mounting box arranged on the box body, an extraction assembly arranged on one side of the mounting box, a conversion assembly arranged in the mounting box, a fixing plate arranged on one side of the fixing plate, and an inclined pipe arranged on one side of the fixing plate. A sponge block is arranged on the other side of the fixing plate and connected with one end of a mounting frame, a sponge block is also arranged at the other end of the mounting frame, an extrusion plate is arranged at the end of the sponge block, a condensation pipe is mounted in the mounting frame, a drainage pipe is arranged on one side of the mounting box, and a driving mechanism is arranged in the mounting box. According to the annealing equipment for stainless steel plate production, water vapor is conveniently recycled through the conversion assembly, so that water resources are saved, a sponge block can be regularly extruded through an extrusion plate driven by a motor, absorbed water is discharged, and the water vapor treatment efficiency is further improved.

The utility model relates to the technical field of water faucet, concretely relates to a bathroom faucet convenient to assemble, technical solution main points include valve body, valve core subassembly, end cover and handle, the hot water flow channel, cold water flow channel, water outlet flow channel and installation groove are arranged in the valve body, the tank bottom of installation groove sets up hot water hole, cold water hole and water outlet hole, the isolation department is arranged in the valve body, the isolation department is symmetrically arranged two and separates hot water and cold water, two isolation departments form the hook groove area, the canyon area, hot water hole, cold water hole are in the hook groove area, and water outlet hole is in the canyon area, and at least two positioning grooves are arranged on the tank bottom, the positioning column of two with the positioning groove insertion is arranged on the valve core subassembly, makes the water pass hole of valve core subassembly and hot water hole, cold water hole and water outlet hole mutually coincide. The utility model realizes reliable convenient assembly through above -mentioned structure.

The invention discloses a high-toughness epoxy resin material as well as a preparation method and application thereof, and aims to solve the problems that traditional epoxy resin is high in brittleness, and strength and toughness are difficult to consider at the same time. The preparation method comprises the following steps: carrying out incomplete silane coupling agent surface modification on glass fibers to obtain modified glass fibers with part of silicon hydroxyl reserved; synthesizing modified polyurethane of which the tail end contains an isocyanate group; directionally grafting the two to form a compound; mixing and curing with epoxy resin and a curing agent to obtain a target material. Through the innovative design of controllable defect manufacturing and dynamic key directional anchoring, the normal-state high-strength and stress high-toughness synergistic performance is achieved, meanwhile, the material is stable in structure, has the dynamic repairing potential, can prolong the service life and is suitable for preparing coatings, electronic packaging materials and adhesives.

This invention belongs to the field of heavy metal removal technology, specifically disclosing an extract from the leaves of a Solanaceae plant, its extraction method, and its application. The extraction method includes the following steps: S1, mixing tomato and pepper leaves, chopping them to obtain a preliminary mixture; S2, mixing a compound microbial agent with the preliminary mixture obtained in S1, fermenting, sterilizing, centrifuging, filtering through a 0.45μm filter membrane, discarding the precipitate, and obtaining a fermented preliminary mixture; S3, concentrating the fermented preliminary mixture obtained in S2 under reduced pressure to obtain a concentrated fermentation broth; S4, adding sodium carboxymethyl cellulose to the concentrated fermentation broth obtained in S3, stirring evenly, and freeze-drying to obtain the Solanaceae plant leaf extract. This Solanaceae plant leaf extract can effectively remove cadmium from aquatic products, aiding in the growth recovery of aquatic products after cadmium stress, and can also effectively maintain the pH value of white clam muscle, reducing lactic acid accumulation and glycogen consumption, and maintaining the freshness of the meat.

The utility model provides a kind of electromagnetic brake, the electromagnetic brake includes the shell, clutch plate, friction disc and tail plate in turn stacked along preset path, the preset path is parallel to the axial direction of the shell, the shell is equipped with the elastic member and excitation coil acting on the clutch plate;Multiple first slots extending along its radial direction are opened on the clutch plate, the opening of the first slot extends to the outer ring of the clutch plate, and penetrates the clutch plate along the axial direction of the clutch plate, so that the clutch plate is composed of multiple action pieces evenly distributed around its axis;The elastic member includes multiple brake springs, multiple brake springs are one-to-one corresponding with the action piece Setting, and for abutting on the action piece. The electromagnetic brake provided by the utility model is more uniform to the friction effect of friction disc, reduces the local wear of friction disc;Metal powder accumulation in friction area can be reduced, so as to improve the service life of friction disc.

This utility model belongs to the technical field of unpacking equipment, and provides an unpacking mechanism and machine for low-flow materials. The unpacking mechanism for low-flow materials includes a flipping conveyor assembly and a cutting assembly. The flipping conveyor assembly has conveying and gripping components on both its upper and lower sides for alternately conveying and gripping material bags. The conveying and gripping components include a conveying component and a gripping component; the conveying component receives and transports the material bags, and the gripping component grips and releases them. The flipping conveyor assembly flips 180 degrees each time, with the upper side being a bag-breaking station and the lower side a material unloading station. The cutting assembly is located on the upper side of the flipping conveyor assembly and includes a lifting component and a cutting tool. The lifting component is fixedly installed, and its power output end is connected to the cutting tool to drive the cutting tool to move up and down. The cutting tool is used to cut the material bag in an "X" shape. The unpacking machine includes the aforementioned unpacking mechanism for low-flow materials.

The utility model belongs to the field of winding devices, and particularly relates to an adjustable winding device which comprises a bottom plate. A first vertical plate is fixedly connected to the side wall of the top of the bottom plate; a second vertical plate is fixedly connected to the side wall of the top of the bottom plate; the first vertical plate and the second vertical plate are symmetrically arranged; by arranging a first electric push rod, a second electric push rod, a movable rod, a fixed seat, an adjusting plate, a fixed plate and a supporting rod, the diameter can be quickly adjusted to be proper according to the specification and winding requirements of polyester cotton yarns, the flexibility is beneficial for a production line to quickly adapt to production of the polyester cotton yarns of different batches or specifications, the overall production efficiency is improved, and the production cost is reduced. By arranging the supporting devices matched with different winding roller diameters, the winding rollers can be fixed from the inside, so that when polyester cotton yarns are wound by the winding rollers, a more stable rotating state can be kept, shaking or deviation caused by external factors is reduced, uniform tension and arrangement of the yarns in the winding process can be kept, and the winding quality of the polyester cotton yarns is improved. Therefore, the winding quality is improved.

This invention belongs to the field of chip processing technology, specifically a chip pin auxiliary mounting device, including a fixed base plate. A bent fixing rod is provided on the surface of the fixed base plate, with its bottom end fixedly connected to the top of the inner cavity of the fixed base plate. A torque motor is fixedly connected to the top of the bent fixing rod, and a transmission plate is rotatably connected to the top of the output shaft of the torque motor. During the soldering process, this device can press the upper surface of the chip through a pressure shell, ensuring that the chip does not shift during soldering. Furthermore, when the pressure from the pressure shell on the chip is too great, the arc-shaped clamps on both sides can automatically prevent the pressure shell from pressing down and push it upwards, thus ensuring that the chip is not damaged due to excessive pressure or loosened due to insufficient pressure, resulting in poor soldering quality.

The utility model provides a motor shell convenient to clean, and belongs to the technical field of motors. The problem that an existing motor shell is inconvenient to clean is solved. The motor shell convenient to clean comprises a motor shell, a motor shaft is arranged in the motor shell, the motor shell comprises a motor shell body, a front end cover and a rear end cover, one end of the motor shaft penetrates out of the rear end cover and is connected with a cooling fan used for cooling, and one end of the rear end cover is provided with a detachable dustproof cover used for protecting the cooling fan. The rear end cover is provided with a connecting part used for being connected with the dust cover, the inner wall of the connecting part is provided with a clamping mechanism, the connecting part is provided with an installation space for installing the clamping mechanism, the clamping mechanism comprises a clamping block and a clamping spring, the dust cover is provided with a clamping groove matched with the clamping block, and the clamping spring is arranged in the clamping groove. And an unlocking piece is arranged between the connecting part and the dust cover. The utility model has the advantage of being convenient to clean.

This utility model discloses a sand and gravel separator, specifically relating to the field of concrete production technology. It includes a collection box with an auger conveyor installed on one side. The bottom of the auger conveyor is connected to a discharge port. A screening machine is installed at the top of the collection box, with a feed port connected to its top. A cleaning component is installed inside the screening machine, and a feeding mechanism is installed inside the discharge port. The cleaning component includes a baffle plate fixedly connected to the inside of the screening machine. A first filter screen and a second filter screen are fixedly connected inside the screening machine by screws, with the second filter screen installed on one side of the first filter screen. By setting up the cleaning component and the feeding mechanism, this utility model allows for dual screening of sand and gravel by the first and second filter screens, effectively cleaning their surfaces, reducing clogging and improving screening efficiency, maintaining good separation performance, and minimizing sand and gravel accumulation and compaction inside the discharge port, ensuring smooth discharge of sand and gravel.

The utility model discloses a kind of plastic particle processing cleaning devices, including auger cleaning machine and deslagging component, deslagging component is set to the outside of auger cleaning machine, the side of mounting shell is fixedly connected with auger cleaning machine, filter screen is installed in the inside of communicating hole, filter screen is used to filter the plastic particle in the inside of auger cleaning machine, mounting end cover is installed in the top of mounting shell, conveying component and filter component are installed in the inside of mounting shell, conveying component is used to convey the water flow filtered by filter component to the inside of auger cleaning machine.The utility model uses the cooperation use mode of auger cleaning machine and deslagging component, under the action of conveying component, can form a water flow circulation path between mounting shell and auger cleaning machine, so that the impurity sludge in the inside of auger cleaning machine can be conveyed to the inside of mounting shell, so as to reduce the accumulation of impurities in the inside of auger cleaning machine.

The invention discloses a data processing service dynamic data flow prediction method for industrial big data, and relates to the technical field of data processing, and the method comprises the steps: calculating a tail section proportion, a tail section concentration ratio and a front and back section balance degree based on the distance measurement distance of intelligent material handling equipment; performing scene judgment on the current time window based on the tail section proportion, the tail section concentration degree and the front and back section balance degree to obtain a scene marking result; calculating a re-interpretation occupation evidence value corresponding to the current time window based on the scene marking result; and determining the re-explanation occupation evidence value corresponding to the next time window through the re-explanation occupation evidence value corresponding to the current time window. According to the invention, the continuous operation capability of the intelligent material carrying equipment in the cold-chain low-temperature scene is improved.

The utility model discloses a suspended type floor guardrail which comprises a cap, a metal gasket, a rubber gasket, a metal end, a chemical bolt and a flexible cross rod, the lower portion of the chemical bolt is fixed with embedded steel bar glue, and the upper end of the chemical bolt is fixed with the bottom of the metal end through the rubber gasket, the metal gasket and a nut in sequence. A flexible transverse rod is connected between the inner sides of the upper ends of the metal ends, and caps are arranged on the tops of the metal ends. Sundry accumulation is avoided through the design of the ground clearance cross rod, efficient buffering is achieved by combining the flexible material and the elastic supporting structure, and the device is suitable for area division and anti-collision requirements of workshops, warehouses and the like and has the advantages of being convenient to install and low in maintenance cost.

This application discloses an infeed / discharge cylinder for a sheet metal forming machine, relating to the technical field of infeed / discharge cylinders. It includes a cylinder body and a blower. The cylinder body is connected to an infeed pipe and an outlet pipe. The infeed pipe is connected to an infeed valve, and the outlet pipe is connected to an outlet valve. The blower is connected to an exhaust pipe and an exhaust pipe, both connected to the cylinder body. The exhaust pipe is connected to an exhaust valve, and the exhaust pipe is connected to an exhaust valve. The exhaust pipe is connected to an infeed pipe, which is connected to an infeed valve. The exhaust pipe is connected to an outlet pipe, which is connected to an outlet valve. When material needs to be fed into the cylinder, the outlet valve, infeed valve, and exhaust valve are closed, while the exhaust valve, outlet valve, and infeed valve are opened. The blower rotates, and the gas inside the cylinder passes through the exhaust pipe and is discharged from the outlet pipe. The gas pressure inside the cylinder decreases, causing the raw material from the infeed pipe to be drawn into the cylinder, thereby preventing the raw material from contacting the blower blades and preventing combustion due to friction between the raw material and the blower blades.

The wet spraying machine comprises a base, a storage box is arranged on the left side of the upper end of the base, a protective cover is arranged at the upper end of the storage box, a feeding pipe is arranged in a feeding port formed in the upper side of the front end of the storage box, a feeding valve is connected to the middle of the feeding pipe in series, and installation covers are arranged on the left side and the right side of the upper end of the storage box respectively. A first sprayer is arranged on the front side of the base, electric push rods are arranged at the four corners of the lower end of the base correspondingly, and supporting plates are arranged at the lower ends of the telescopic ends of the electric push rods correspondingly. The cleaning mechanism comprises a mounting rod, a transmission plate and a fixing rod, connecting pipes are slidably connected with sliding holes formed in the front side and the rear side of the upper end of the mounting cover correspondingly, and second spray heads are arranged at the lower ends of the four connecting pipes correspondingly. It is ensured that the interior of the anti-sticking wet spraying machine is unobstructed, and the spraying efficiency is improved.

This invention relates to the field of medical device technology and discloses a rotary cutting and volume reduction device, comprising: a rotary cutting head, an outer tube assembly, a torque transmission tube, and a limiting structure. The torque transmission tube is used to drive the rotary cutting head to rotate relative to the outer tube assembly. The limiting structure includes: a first limiting surface, a second limiting surface, and a rolling assembly. The first limiting surface is located at the distal end of the outer tube assembly and faces the proximal end of the outer tube assembly. The second limiting surface is located at the distal end of the torque transmission tube, and the first and second limiting surfaces are opposite to each other. The rolling assembly includes rolling elements. The first limiting surface is rotatably connected to the second limiting surface through the rolling elements. The first limiting surface is used to limit the displacement of the rolling elements and the second limiting surface towards the distal end. The first and second limiting surfaces limit the axial movement of the distal end of the torque transmission tube, thereby limiting the distal movement of the rotary cutting head, improving the axial stability of the rotary cutting head. Multiple rolling elements, acting as a friction pair, can reduce the friction between the first and second limiting surfaces, reducing energy loss.

A three-dimensional anti-seepage structure under the sandy loam geological condition is of a three-dimensional closed structure formed by vertical anti-seepage walls, a horizontal anti-seepage layer and a drainage protection system in a cooperative mode, the drainage protection system is arranged in an anti-seepage space, the vertical anti-seepage walls are continuously arranged in the circumferential direction of the anti-seepage space, the vertical anti-seepage walls are stirring pile walls, and the horizontal anti-seepage layer is arranged on the horizontal anti-seepage layer. The horizontal anti-seepage layer is laid at the bottom of the anti-seepage space, a strong permeable stratum is arranged below the horizontal anti-seepage layer, the horizontal anti-seepage layer comprises a composite geomembrane, the composite geomembrane covers the upper portion of the strong permeable stratum in the anti-seepage space, and the drainage protection system comprises a soft longitudinal water collecting concealed pipe and a transverse communicating pipe which are arranged below the composite geomembrane. In conclusion, the anti-seepage device has the advantages that the anti-seepage efficiency is high, the capacity of adapting to differential settlement of a sandy loam foundation is high, pressure is effectively guided, drained and released, the underground water uplift pressure uplift damage risk is reduced, and the stability is high.