56results about How to "Good anti-wear effect" patented technology

The invention provides a low-acid and efficient diesel antiwear additive and a preparation method thereof, comprising a specific preparation technology and six specific material components. Material (A) is at least one component of amide; material (B) is at least one component of amine oiliness improver; material (C) is at least one component of ester oiliness improver; material (D) is at least one antirust additive; material (E) is at least one demulsifier; and material (F) is at least one organic solvent. The antiwear additive prepared by the above components has the characteristics of goodantiwear effect, low acid and the like; the abrasion resistance is greatly improved by adding low sulphur diesel and no adverse effect is exerted on the quality indexes. The raw material components of the invention can be bought in commodity markets; and the production technology is simple and feasible.

The invention provides an anti-abrasion and attrition-reducible circulating fluidized bed boiler. The circulating fluidized bed boiler comprises a plurality of water wall tubes for forming a furnace water wall, wherein a plurality of horizontal flow blocking beams perpendicular to the water wall tubes in the length direction are arranged on the water wall; the positions of the horizontal flow blocking beams on the water wall meets an exponential formula that a<n+1>-(L+1)*a+L is equal to U; the value of the a can be obtained by using a mathematical Newton secant method; the root of a being equal to 1 is omitted to obtain a first horizontal flow blocking beam; the distance between the first horizontal flow blocking beam and an anti-abrasion plastic upper edge of a dense-phase zone is a; the distance between a second horizontal flow blocking beam and the first horizontal flow blocking beam is a<2>; and so on, the distance between a nth horizontal flow blocking beam and a (n-1)th horizontal flow blocking beam is a<n>. According to the invention, the horizontal flow blocking beams are arranged in the boiler, do not obviously affect rated operating parameter of the boiler, can effectively reduce abrasion of grains on the water wall tubes, and can reduce abrasion effect of swirl, turbulence, swirl flow, angle gather and the like, and can realize an excellent protective effect on the whole inner wall of the boiler.

The invention relates to a wide dump truck, which comprises a driving cab (1), a truck frame (2), a power assembly (3), a transmission system (4), a steering system (5), brake systems (6), a front suspension (7), a back suspension (8), a lifting system (9), a carriage (10) and electrical systems (11), wherein the driving cab (1) is arranged at the upper side of the front part of the truck frame (2), the power assembly (3) is arranged in the inner side of the truck frame (2), the transmission system (4) is arranged in the inner side of the truck frame (2), the steering system (5) is arranged at the inner side and the outer side of the truck frame (2), the brake systems (6) are arranged in the inner and outer sides of the truck frame (2), the front suspension (7) is arranged at the lower side of the front part of the truck frame (2), the back suspension is arranged at the lower side of the middle back part of the truck frame (10), the lifting system (9) is arranged at the upper side of the truck frame, and is connected with the carriage (10), the carriage (10) is arranged at the upper side of the truck frame (2), and the electrical systems (11) are arranged in the inner and outer sides of the truck frame (2). The wide dump truck has the advantages that the defects of the previous wide dump truck are overcome, and a new design platform is provided for the development of large-tonnage wide trucks.

The invention discloses a high intensity abrasion resistant arc spraying filament material for circulating fluidized bed boiler, wherein low-carbon steel or stainless steel band is used as the shell of the material, the core is added by 25-48 wt% of mixture powder of CrB2 and B4C, the content of CrB2 in the mixture is 70-95 wt%. The core comprises 0-5 wt% of powder of any one selected from Ni and / or Al and / or Mo and / or rare-earth element.

The present invention provides a flux-cored welding wire with wear-resistant band for drill pipe, which is composed of the following raw materials in mass percentage: chromium: 8-9%, boron: 2-3%, molybdenum: 0.2-1%, nickel: 1-2% , carbon: 0.3 to 0.8%, and the balance is iron. The present invention also proposes a method for manufacturing the aforementioned drill pipe wear-resistant banding flux-cored wire, comprising: step 1, fully mixing the powders of chromium, boron, molybdenum, nickel, carbon, and iron through a 60-mesh sieve; step 2 . Add the raw materials obtained in step 1 into the welding wire sheath and seal it. The drill pipe wear-resistant band flux-cored welding wire and the manufacturing method of the embodiment of the present invention can have a better anti-wear effect than the existing welding wire, and improve the service life of the equipment.

The invention provides a drill rod wear-resisting belt flux-cored wire. The drill rod wear-resisting belt flux-cored wire is composed of, by mass, 8-9% of chromium, 2-3% of boron, 0.2-1% of molybdenum, 1-2% of nickel, 0.3-0.8% of carbon, and balanced iron. The invention further provides a manufacturing method of the drill rod wear-resisting belt flux-cored wire. The manufacturing method of the drill rod wear-resisting belt flux-cored wire comprises the steps of fully mixing the powder of the chromium, the powder of the boron, the powder of the molybdenum, the powder of the nickel, the powder of the carbon, and the powder of the iron after all the powder is sieved by a 60-mesh sieve, and adding the raw material obtained in the first step in the outer surface of the flux-cored wire and sealing well. According to the drill rod wear-resisting belt flux-cored wire and the manufacturing method thereof, compared with an existing wire, the drill rod wear-resisting belt flux-cored wire is good in anti-abrasion effect, and capable of prolonging the service life of equipment.

The invention relates to a water wall abrasionproof scale type welding method. Abrasionproof plates are adopted to carry out abrasion prevention on water cooled pipes in a sequential scale type overlapped manner. One side of each abrasionproof plate is provided with circular arc matched with the outer wall of the corresponding water cooled pipe, wherein the two sides of the circular arc are provided with an X welding point and a Y welding point, and the two welding points are arranged on the two sides of the abrasionproof plate. A horizontal line is drawn for the water cooled pipes which are arranged side by side, and the abrasionproof plates intersect with the horizontal line. Frstly, the X welding points of the first abrasionproof plates are subjected to spot welding, then, the X welding points of the second abrasionproof plates are subjected to spot welding sequentially, the multiple abrasionproof plates are sequentially subjected to spot welding, the abrasionproof plates intersect with the horizontal lines and are mutually and partially overlapped, the X welding points of each abrasionproof plate are welded, and then the Y welding points of each abrasionproof plate are welded; or the X welding points and the Y welding points of each abrasionproof plate are sequentially welded. The method using the scheme has the beneficial effects that overlapping gaps of the abrasionproof plates are tight, the welding quality is high, the abrasionproof plates are not prone to disengaging, and the abrasionproof effect is good.

The invention discloses a floated communication repeater tower and relates to the technical field of wireless communication repeater devices at sea. The technical problems are solved that in the existing floated communication repeater tower, the gravity is not stable, the ability of typhoon resistance is poorer, and the service life is limited. The floated communication repeater tower comprises a floating disc and an anchor structure; the floating disc comprises a floating disc body, the floating disc body is in a shape of a circular disc, and the floating disc is made of cement; a first compartment and a second compartment which are distributed in an up-down mode are arranged in the floating disc body; the first compartment is composed of a storage compartment located on the center area and a filling compartment which encloses the storage compartment, the storage compartment is used for containing communication devices, and the filling compartment and the second compartment are filled with plastic foam materials; the anchor structure comprises an anchor body, the anchor body is a hexagonal prism body, and the diameter of the hexagonal prism body is identical to the height of the hexagonal prism body; triangle gaps which extend in the axial direction are formed in all side surfaces of the hexagonal prism body of the anchor structure, and the triangle gaps are used for blocking silt.

The invention provides equipment for filling according to the depth of a collapse pit of a decommissioned uranium mine. The equipment comprises a main body; a fixed part is fixedly mounted in the main body; a limiting push assembly is fixedly mounted on the lower side of the main body; air bag linkage assemblies are fixedly mounted on the left and right sides of the inner wall of the main body; the upper side of each air bag linkage assembly is connected with a gear linkage assembly; the upper end of each gear linkage assembly is movably connected with a material limiting assembly; and each material limiting assembly comprises a mounting block. According to the equipment for filling according to the depth of the collapse pit of the decommissioned uranium mine, along with continuous adding and filling of fillers, when the collapse pit of the decommissioned uranium mine is gradually filled with the fillers, the upper ends of movable push rods are used for driving material limiting baffles to move relatively, and the material limiting baffles are prompted to be in a mutual closed state, so that the equipment achieves the purpose of automatic closing when the collapse pit of the uranium mine is filled up; and the equipment does not need the assistance of manual supervision, so that the labor intensity of workers is reduced, and the practicability of the equipment is further improved.

The invention belongs to the technical field of chain appliances, and particularly relates to a grain lifting chain for rice harvesting. The grain lifting chain for rice harvesting consists of a plurality of groups of chain units which are combined and connected, wherein each chain unit comprises a long chain and a short chain; each of the short chains and the long chains comprises an inner piece, an outer piece and a pin shaft; the inner and outer pieces are connected in a penetration way through the pin shafts; shaft sleeves are sleeved on the pin shafts; and two blades are arranged on each long chain, are positioned between the corresponding inner and outer pieces, and are connected through a connecting piece. Compared with the prior art, the grain lifting chain for rice harvesting has the beneficial effects that the grain lifting chain for rice harvesting is reasonable in structure; and structural connection between the parts is optimized, so that the probability of prolonging and the like of the grain lifting chain for rice harvesting is lowered, the grain lifting chain for rice harvesting is resistant to wear, and the service life of the grain lifting chain for rice harvesting is prolonged.

The invention discloses a high-temperature alloy end mill. The high-temperature alloy end mill comprises a mill bar and a mill head; a mill blade is fixedly connected to the left side surface of the mill bar; a notch is formed in the middle of the left end of the mill blade; a first drainage channel is formed in the middle of the mill blade; the notch communicates with the first drainage channel; a dustproof net is fixedly connected to the inner part of the left end of the first drainage channel; and a circular groove is formed in the outer side surface of the right end of the mill bar. According to the high-temperature alloy end mill, in the working state, lubricating fluid can flow out of the notch, and therefore the lubricating effect can be achieved, too fast abrasion of the end mill can be effectively avoided, the certain cooling performance can be achieved, the deformation of the end mill can be effectively avoided, the anti-wear effect can be good, the high-temperature-resistant performance can be high, impurities can be effectively blocked, blockage of the first drainage channel can be avoided, the leakage of liquid in a liquid storage cavity ican be avoided, the use can be more convenient, and the normal use of the end mill can be effectively guaranteed.

The invention belongs to the technical field of molds, and discloses a guide pillar for bending a steel bar mold. A guide hole is formed in the center of an end cover, and a guide pillar body A is installed in the guide hole. A sealing washer is arranged between the inner wall of the guide hole and the outer wall of the guide pillar body A. A stopping block is installed at the top of the guide pillar body A. A reset spring is arranged between the stopping block and the end cover. The bottom of the guide pillar body A is connected with a guide pillar body B. The guide pillar body B makes contact with the inner wall of a guide sleeve. An oil storage part is arranged between the inner wall of the guide sleeve and the guide pillar body B. The side, making contact with the guide pillar body B, of the oil storage part is provided with rubber. An opening is formed in the top end of the oil storage part. A baffle is obliquely arranged on the inner wall of the guide sleeve. The baffle is fixed to the side wall of the upper portion of the oil storage part. One side, fixed to the inner wall of the guide sleeve, of the baffle is lower than the other side of the baffle. The opening of the oil storage part abuts against the baffle. Fluid oil is contained in the oil storage part. The problems that the abrasion reducing effect of the guide pillar is bad, cost is high and the structure is complex in the prior art can be solved.

The invention discloses heat-resisting and wear-resisting PVC (Polyvinyl Chloride) plastic. The heat-resisting and wear-resisting PVC plastic is prepared from the following materials in parts by weight: 60 to 70 parts of polyvinyl chloride, 18 to 22 parts of a high molecular polymer, 30 to 35 parts of a plasticizer, 2 to 4 parts of a stabilizer, 6 to 8 parts of a filler, 3 to 5 parts of an antioxidant, 1 to 3 parts of a lubricant and 0.5 to 1 part of a modifying agent. According to the heat-resisting and wear-resisting PVC plastic disclosed by the invention, chemical components are optimized,so an inner structure of the PVC plastic is improved from the microcosmic aspect; and the heat-resisting and wear-resisting PVC plastic has excellent heat-resisting performance and anti-abrasion performance.

The invention discloses an anchor structure and a floating communication relay tower with the same, and relates to the technical field of wireless communication relay equipment at sea. The purpose is to solve the technical problems that the gravity center of an existing floating communication relay tower is unstable, the typhoon resistance capability is poor and the service life is limited. The anchor structure comprises an anchor body, the anchor body is in a hexagonal prism shape, and the diameter and height of the hexagonal prism are the same; a triangular notch extending in the axial direction is formed in each side surface of the anchor structure in a hexagonal prism shape, and the triangular notches are used for blocking sediment.

The invention belongs to the technical field of chain appliances, and particularly relates to a side-guide chain for pen making. The side-guide chain is formed by connecting and combining a plurality of chain units. Each chain unit comprises outer links, inner links and a step dowel; two ends of the step dowel penetrate one outer link and one inner link in group, one end of the step dowel extends to form a boss after penetrating the inner link and the outer link in group; the step dowel is sleeved by a bushing. The side-guide chain for pen making is further provided with a plurality of guide cranked plates which are arranged at the equal interval and provided with guide pins, and one end of each guide cranked plate is connected with one guide roller. The side-guide chain for pen making is reasonable in structure arrangement, and structural connection of different parts is optimized, so that the side-guide chain for pen making is firmer and more wear-resistant while service life thereof is prolonged.

The invention discloses lubricating grease for a tubular motor and a preparation method of the lubricating grease for the tubular motor. The lubricating grease is prepared from the following raw materials in parts by weight: 45-65 parts of 20# machine oil, 20-30 parts of poly alpha-olefin, 4-8 parts of glycerol tribehenate, 5-10 parts of aluminum distearate, 3-6 parts of calcium myristate, 5-10 parts of diisooctyl maleate, 6-9 parts of sodium lauroyl sarcosine, 2-3 parts of potassium dichromate, 1.5-2.5 parts of zinc sulfate, 1-2 parts of 2-mercaptobenzothiazole, 2-4 parts of molybdenum dibutyldithiocarbamate, 10-15 parts of organobentonite, 3-5 parts of a dimerized linoleic acid copolymer and 2-3 parts of N-phenyl-2-naphthylamine. The lubricating grease disclosed by the invention has the extremely high oil film forming ability, the good noise reduction and antiwear effects, the good lubricating property and heat resistance, the excellent oxidation stability, mechanical stability and ageing resistance, and the long service life, and is applied to lubrication, friction reduction and noise reduction of the various tubular motors.

The invention discloses an elastic air cushion anti-attrition elbow. The elastic air cushion anti-attrition elbow comprises an elbow pipe wall, an elastic net and a flow dividing inserting plate, a flow dividing inserting plate is additionally arranged at an inlet to divide airflow carrying materials, so that the airflow is layered and collided, and abrasion to the wall of a bent pipe and a metal net is reduced. The elastic net is arranged in the inner side of the bent pipe wall, an air chamber area is formed between the elastic net and the inner side of the bent pipe wall, square through holes are uniformly distributed in the elastic net, and the size of the square through holes is smaller than that of internally circulating solid particles, so that air is separated from the solid particles; and a part of air enters the air chamber area through the square through hole to form the air cushion; solid particles collide with the elastic net, the elastic net absorbs impact kinetic energy of the solid particles and converts the impact kinetic energy into elastic potential energy, then the potential energy is converted into kinetic energy to accelerate the particles to rush out of the elbow, and energy loss is little while the movement direction of the solid particles is changed; and as the pressure difference exists between the inlet and the outlet of the elbow, an air cushion rushing to the axis of the elbow can be formed in the air chamber area to protect the elastic net and the elbow pipe wall. The elastic air cushion anti-attrition elbow is longer in service life, better in anti-abrasion effect and more beneficial to replacement and maintenance.

The invention discloses an improved plastic copper belt for a photovoltaic cell and relates to the technical field of plastic copper belts. The improved plastic copper belt for the photovoltaic cell comprises a rolling wheel; the surface of the rolling wheel is wound with a plastic copper belt body; the surface of the plastic copper belt is fixedly connected with one side of a rubber cushion; wearresistance cushions are fixedly connected to the positions, on the left side and the right side of a rubber cushion and on the surface of the plastic copper belt body respectively; fixed plates are in lap joint to the left side and the right side of the rolling wheel respectively; one side of the rolling wheel is provided with rotary shafts in an interpenetration manner; and the left end and theright end of the rotary shafts are movably connected with one sides of the two fixed plates respectively. For the improved plastic copper belt for the photovoltaic cell, by arranging chutes, fixed grooves, supporting columns, sleeve rings, springs, connection rods and limiting blocks, when the plastic copper belt body is used, the four limiting blocks are pulled outward to drive the correspondingconnection rods to move, the connection rods drive the corresponding sleeve rings to extrude the corresponding springs, and then the plastic copper belt body is taken for use after the rotary rollingwheel on one side of the plastic copper belt body is withdrawn.

The invention discloses a cable mounting support. The cable mounting support comprises a central column, a first connection head, a fixed clamping block, a movable clamping block and a fixed frame. The top part of the central column is connected with the bottom part of the fixed frame through a rotation sleeve. A bolt penetrates through one side of the fixed frame. The right side of the bolt is connected with the movable clamping block. The fixed clamping block is arranged at one side of the top part of the fixed frame. The first connection head and a second connection head respectively sleeve the middle part and the bottom part of the central column. A first clamping groove is further formed in the top part of the second connection head. The first clamping groove is connected with hinge pins in the inner cavities of a first support leg, a second support leg and a third support leg through cross arms. The top parts of the first support leg, the second support leg and the third support leg are respectively connected with a first connection member. According to the invention, the height of the central column is adjustable, a worker is prevented from bending down for a long time, the waist is prevented from being damaged, cable accessories are prevented from contacting the ground and sticking to dust, and the subsequent normal work of the cable is not influenced.

The invention discloses a flame-retardant tent for outdoor recreation. The flame-retardant tent comprises tent cloth and a support which is matched with the tent cloth; the tent cloth comprises top cloth, side cloth and bottom cloth; the top cloth sequentially comprises an ultraviolet protection layer, a heat insulation layer and a base cloth layer from the outside to the inside; the side cloth comprises a UV-resistant layer, a flame retardant layer and a base cloth layer which are sequentially arranged from the outside to the inside of the side cloth; the bottom part sequentially comprises anabrasion-proof layer, a moisture-proof layer, a base cloth layer and an anti-skid layer from the outside to the inside; the top cloth, the side cloth and the base cloth are mutually stitched to forma tent cloth. The invention discloses a flame-retardant tent for outdoor recreation, which reasonably improves the structure of the tent, effectively retards flame, and avoids potential safety hazardswhen being used outdoors.

The invention discloses a novel display module with a polaroid having a light-shielding wear protection function, and relates to the technical field of polaroid display modules. The novel display module comprises a placement frame and a wiring assembly, and the inner side of the placement frame is provided with a splicing module; and each splicing module comprises a module A, modules B, a module C, a connecting sliding rail, a connecting sliding block, a fastening groove, a fastening rotary knob, a nameplate, a placement protruding block and a placement bolt, and the two sides of the module A are connected with the modules B. By means of the module A, the module B and the module C which are movably connected, splicing among the modules A, the modules B and the modules C is facilitated according to actual requirements so that the requirements of display screens of different sizes can be met, through arrangement of the connecting sliding rail and the connecting sliding block, and splicing among the module A, the module B and the module C can be achieved only by connecting the connecting sliding block with the connecting sliding rail in a sliding mode. And a fastening knob is arranged in a matched manner to limit and fix the connecting sliding block so that the firmness of connection is ensured, and the splicing efficiency is greatly improved.

The invention discloses a wear-resistant device of a water cooling pipe wall of a circulation fluidized bed boiler. The wear-resistant device comprises water cooling pipes and a rib plate used for fixing the water cooling pipes; baffles are transversely arranged on the water cooling pipes which are vertical to an axial direction of the water cooling pipes; the baffles of the adjacent water cooling pipes are located in a same plane and are formed in one row; a gap is formed between any two adjacent baffles; a semicircular groove is arranged on each baffle body; the grooves are matched with the water cooling pipes in shape; supporting legs are arranged at both sides of the grooves of the baffles; the supporting legs are linked with the rib plate; a distance between the axial adjacent two rows of the baffles of the water cooling pipes is 1.3-1.5m; and a distance between the highest points of the grooves of the baffles and the upper end surfaces of the baffles is 20-25 mm. With the adoption of the device, the baffles arranged on the water cooling pipe walls can be used for preventing fuel from being in direct friction contact with the water cooling pipe walls, so that the wear service life of the water cooling pipe walls can be naturally prolonged. The wear-resistant device has the advantages of simple structure, convenience for installation, and good wear-resistant effect of the water cooling pipe walls.

The invention discloses a button sorting device used for garment manufacturing. The button sorting device comprises a conical hopper, a recognition device, a bottom plate, a discharging device and a plurality of direction-changing devices. By means of the button sorting device, large-bath buttons can be automatically classified, the phenomenon of labor wasting caused by manual sorting is avoided,during using, the buttons fall off uniquely and uniformly by means of the discharging device and are fast detected by the recognition device, permanent magnets are driven to move in an electromagneticcoil attraction mode, springs achieve damping and buffering purposes as well as fast storing elastic potential energy so as to be ready for bouncing operation next time, the rotating mode of guide plates fast responds, the interval time is short, the button separation speed can be increased, furthermore, the equipment cost is low, the abrasion resistance effect is good, and the button sorting device is suitable for wide application and popularization.

The invention discloses a novel power generator and relates to a power generator. According to the prior art, sundries are easy to enter a conventional power generator, and dust and sundries are easy to wind in a carbon brush and a collector ring in the conventional power generator due to exposure, as a result, the conventional power generator is excessively worn. The invention just aims to solve the above problem. The novel power generator comprises a power generator body; the collector ring is mounted in the power generator body; a carbon brush mounting seat is arranged above the collector ring; a carbon brush is movably inserted into the carbon brush mounting seat; a protective sleeve wrapping the carbon brush and the collector ring is mounted on the carbon brush mounting seat; an air inducing connector is mounted on one side of the carbon brush mounting seat; an air inducing pipe is mounted below the air inducing connector; the air inducing pipe penetrates through the protective sleeve and extends into the protective sleeve; an air spraying connector is installed at the end, extending into the protective sleeve, of the air inducing pipe; and an air outlet is formed in the end, away from the air spraying connector, of the bottom of the protective sleeve. According to the novel power generator of the invention, sundries are prevented from entering the power generator, the problem that the sundries and dust are involved between the contact surfaces of the collector ring and the carbon brush to cause excessive abrasion of the carbon brush or the collector ring is avoided, and the novel power generator is effective, reliable and good in anti-abrasion effect.

The invention discloses a water-pressure axial plunger pump piston shoe pair with a lotus leaf-like texture surface, and relates to the technical field of water hydraulic elements. The piston shoe pair comprises a swash plate and piston shoes, wherein a cross-scale secondary texture is arranged on the surface of the swash plate, and the secondary texture comprises a convex body fixedly connected to the surface of the swash plate and a small convex body or a small concave pit fixedly connected to the convex body. The piston shoe pair solves the problem of aggravation of frictional wear of water-pressure axial plunger pump piston shoe pairs and other water hydraulic element friction pairs at present, reduces the water film adhesion and friction coefficients of the surfaces of the swash plate and the piston shoes of a water-pressure axial plunger pump in the friction process, and has high wear resistance and good resistance-reducing and wear-resisting effects.

The invention discloses a robot for preventing shoes from rubbing feet, which comprises a driving assembly, a simulated motion assembly and a shell, wherein the driving assembly is fixed in the shell;the driving assembly is provided with a left driving end and a right driving end; the left driving end and the right driving end are respectively connected with the simulated motion assembly; the left driving end and the right driving end are arranged on the outer surface of the shell and are symmetrical to each other; a plurality of simulated feet are arranged on the simulated motion assembly; ashoe tree sleeved with a shoe is arranged on each simulated foot; and the driving assembly drives each simulated foot to simulate the movement of a human body so as to drive the whole body to move towards one direction.

The invention discloses a high-temperature alloy end mill. The high-temperature alloy end mill comprises a mill bar and a mill head; a mill blade is fixedly connected to the left side surface of the mill bar; a notch is formed in the middle of the left end of the mill blade; a first drainage channel is formed in the middle of the mill blade; the notch communicates with the first drainage channel; a dustproof net is fixedly connected to the inner part of the left end of the first drainage channel; and a circular groove is formed in the outer side surface of the right end of the mill bar. According to the high-temperature alloy end mill, in the working state, lubricating fluid can flow out of the notch, and therefore the lubricating effect can be achieved, too fast abrasion of the end mill can be effectively avoided, the certain cooling performance can be achieved, the deformation of the end mill can be effectively avoided, the anti-wear effect can be good, the high-temperature-resistant performance can be high, impurities can be effectively blocked, blockage of the first drainage channel can be avoided, the leakage of liquid in a liquid storage cavity ican be avoided, the use can be more convenient, and the normal use of the end mill can be effectively guaranteed.

The invention discloses a direct-current combustor for combusting high-temperature raw gas, and belongs to the technical field of efficient clean coal combustion. The direct-current combustor solves the problems that a low-NOx combustor in the prior art is not suitable for efficient low-NOx direct-current combustion of raw gas, and due to the fact that an efficient low-NOx raw gas direct-current combustor does not exist in the prior art, a raw gas direct-current combustor cannot be configured for a segmented coupling pulverized coal combustion technology. The direct-current combustor comprises a center pipe, a raw gas inlet pipeline, a thick raw gas pipeline, a first-stage air distribution pipeline, a thin raw gas pipeline, a fire side wall plate, a porous concentration grid, a splitting grid, a bluff body, a raw gas diffusion ring, a water cooling coil cooling system and a multi-diffusion flame generator. Based on the raw gas horizontal concentration grading, multi-diffusion flame, ignition stable combustion in a bluff body vortex outer boundary layer, rich fuel combustion, water cooling and air cooling comprehensive cooling technologies, raw gas combustion is achieved. The direct-current combustor is suitable for segmented coupling pulverized coal combustion of wide coal types.

The invention relates to a multi-layer composite stainless steel tube. The multi-layer composite stainless steel tube comprises an outer-layer tube body, an inner-layer tube body and a middle layer, wherein the outer-layer tube body and the inner-layer tube body are made of stainless steel materials, the middle layer is fixedly arranged between the outer-layer tube body and the inner-layer tube body, and is made of plastic materials, a zirconium nitride layer is arranged on the outer wall of the outer-layer tube body in a plating mode, and a rustproof coating adheres to the inner wall of the inner-layer tube body. The multi-layer composite stainless steel tube has high mechanical strength, good in corrosion preventing effect, good in abrasion preventing effect and long in service life.