40results about How to "Improve flexural performance" patented technology

The invention provides a secondary sizing agent as well as a preparation method and application thereof. The secondary sizing agent comprises the following components: a main film-forming agent, an auxiliary film-forming agent, a lubricant, a silane coupling agent and water, wherein the main film-forming agent is an aqueous epoxy solution, the auxiliary film-forming agent comprises a low molecular weight epoxy emulsion and an aqueous polyurethane emulsion, and the lubricant comprises an organosilicon lubricant and an ionic lubricant. In the scheme, the secondary sizing agent formed by mixing the main film-forming agent, the auxiliary film-forming agent, the lubricant and the silane coupling agent with proper types and proper contents can endow the silicon carbide fiber with excellent wear resistance, folding resistance and mechanical properties. Compared with one-time sizing, the number of times of wear resistance of the fiber yarn is increased by more than 10 times, the yarn breaking rate in the fabric processing process is greatly reduced from 10% to 0.5%, the surface smoothness of the prepared fiber fabric is greatly improved, the performance of the composite material prepared through the impregnation method is integrally improved, the bending strength is obviously improved, and the performance requirement of the three-dimensional fabric can be completely met.

The utility model provides a temporary stand column system of a foundation pit supporting structure, which comprises a foundation pit wrapped by an enclosure wall, a stand column foundation pile is arranged in the middle of the foundation pit, a stand column is arranged at the top of the stand column foundation pile, the stand column is connected with the enclosure wall through a beam body, and the beam body comprises a plurality of temporary stand column supporting pieces. The two ends of the temporary stand column supporting pieces are connected, the temporary stand column supporting pieces arranged at the two ends of the beam body are fixed to the stand column and the enclosure wall respectively, an operation inner cavity is formed in the stand column, and limiting holes are formed in the side wall of the operation inner cavity. According to the utility model, the temporary supporting column supporting pieces are established, the temporary supporting column supporting pieces can be flexibly disassembled and can be conveniently assembled and connected for the second time, so that a temporary supporting column system of the foundation pit supporting structure realizes a recycling function, and the assembled temporary supporting column supporting pieces are supported by the vertical columns and are fixed by using butt-joint bolts; and the temporary supporting column supporting piece can be separated only by disassembling the bolt.

The invention belongs to the technical field of building materials, and particularly relates to a low-carbon cementing material for preparing a high-speed roadbed and a preparation method of the low-carbon cementing material. The main component mineral powder of the cementing material is subjected to amination treatment, the fly ash is subjected to sulfhydrylation treatment, and the modified gypsum and the citric acid carbon quantum dot doped red mud are introduced, so that the high-speed roadbed low-carbon cementing material is prepared, it is guaranteed that the cementing material has proper final setting time, and the compressive strength and the breaking strength are effectively improved.

The invention provides a double-steel-bar truss net plate interlocking combined wall which comprises a first bottom formwork and a second bottom formwork, the first bottom formwork is provided with a first surface, the first surface of the first bottom formwork is provided with a plurality of first steel bar trusses distributed in parallel in the first direction, the first steel bar trusses extend in the second direction, and the first direction is perpendicular to the second direction; the first steel bar truss protrudes out of the surface of the first bottom formwork. The second bottom formwork is provided with a second surface, the second surface is provided with a plurality of second steel bar trusses distributed in parallel in the first direction, the second steel bar trusses extend in the second direction, and the second steel bar trusses protrude out of the surface of the second bottom formwork; the first surface faces the second surface, the first bottom formwork and the second bottom formwork are stacked, a hollow layer is formed between the first bottom formwork and the second bottom formwork, and the first steel bar truss and the second steel bar truss are located in the hollow layer; the penetrating ribs are located in the hollow layer and inserted into the first steel bar trusses and / or the second steel bar trusses, and the first steel bar trusses and the second steel bar trusses are connected; on one hand, interlocking of the first steel bar truss and the second steel bar truss is achieved, and the bearing capacity and the fracture resistance in the on-site overall concrete pouring process are enhanced; and on the other hand, automatic flow line production is achieved, various walls with hollow layers can be conveniently combined according to needs, equipment is simple, a large overturning table is not needed as traditionally, and any mold table is not needed.

The invention discloses a magnetized graphene-nano silicate gel and a preparation method thereof. The amount of each component is weighed according to the mass ratio, nano silicon oxide and ultrafine powder clinker are put into a planetary mixer for stirring, deionized water is added to stir a gelling component slurry, after standing, deionized water and orthosilicic acid are added while stirring the slurry to obtain an initial silicate gel; a dissolving agent is then added dropwise at a uniform speed while stirring to obtain a dissolved silicate gel, a nano cellulose solution is added to the dissolved silicate gel, a silane coupling agent is added and stirred to obtain a nano silicate gel suspension, graphene is added for magnetization, the suspension is allowed to stand, water is filtered and dried to obtain the magnetized graphene-nano silicate gel powder, which can be applied to concrete to improve the flexural and compressive strength of early concrete and improve the cohesiveness and segregation of concrete.

The utility model discloses a folding-resistant mobile terminal data line, which comprises an end and a line body, and the end and the line body form the data line. According to the utility model, the auxiliary block is adopted, so that when the end head is connected to cause angular deviation between the wire body and the end head, the bent wire body can drive the auxiliary block to rotate, and the auxiliary block can pull the wire body remained in the adaptive cavity; furthermore, the angle of the wire body on the outer side can be flexibly bent without influencing the normal use of the whole body, and when the wire body returns to a horizontal state after the bending is finished, a second winding reel can be driven to wind the retained wire body again through the operation of a second torsion spring, so that the wire body is prevented from being damaged due to the leakage, and the working efficiency is improved. And meanwhile, the wire body and the end head can be changed, the bending position cannot be damaged due to the fixed structure type, the whole-day anti-bending effect is improved, self-adaptive angle adjustment can be carried out, the bending effect of the device is improved, and the device has the advantages of being good in anti-bending effect and capable of achieving bending adjustment.

The utility model belongs to the technical field of epitaxial furnaces, and particularly relates to an improved gas collecting ring of an LED epitaxial furnace, which comprises a gas collecting ring body, a plurality of first exhaust holes and second exhaust holes are arranged on the gas collecting ring body in a surrounding manner, the first exhaust holes and the second exhaust holes are arranged at equal intervals, and the gas collecting ring body comprises a base layer. The two sides of the base layer are fixedly connected with anti-folding layers, the sides, away from the base layer, of the anti-folding layers are fixedly connected with high-temperature-resistant layers, and the sides, away from the anti-folding layers, of the high-temperature-resistant layers are fixedly connected with wear-resistant layers. Through the arrangement of the first exhaust holes and the second exhaust holes, the gas displacement of the gas collecting ring can be effectively improved, so that the gas collecting ring can exhaust gas timely and quickly, and the using effect of the gas collecting ring is effectively improved.

The invention discloses a phosphorite slag-based early-strength anti-crack concrete admixture and a preparation method thereof, and the phosphorite slag-based early-strength anti-crack concrete admixture comprises the following raw materials by weight: 40-60 parts of modified phosphorite slag, 15-25 parts of fly ash, 7-10 parts of sodium bentonite, 5-8 parts of diatomite, 10-15 parts of an additive, and 15-25 parts of composite fiber. According to the admixture, phosphorus slag serves as a main raw material, the surface is modified through a chemical method, meanwhile, fly ash, sodium bentonite, kieselguhr, an additive and composite fibers are used as auxiliary materials, recycling of the phosphorus slag is achieved, the internal structure of concrete is optimized, and the early strength performance, the crack resistance and the salt corrosion resistance of the concrete are improved.

The utility model discloses hollow porous tunnel kiln burner brick relates to tunnel kiln technical field. The utility model discloses a brick body, the inside of brick body is provided with the combustion port, the inside of brick body is provided with the air vent, the inside of brick body is provided with the pre -tightening subassembly, the pre -tightening subassembly includes the pre -buried rod of installation in the inside of brick body, installs the tension rod on the surface of pre -buried rod, installs the reinforcing rib on the surface of pre -buried rod and installs the screw rod on the one end of pre -buried rod, the inside installation of combustion port has the protection layer. Hollow porous tunnel kiln burner brick of the utility model through the unique structure design, has improved its overall performance and service life significantly, and the introduction of pre -tightening subassembly has effectively enhanced the structural strength of brick body, and the synergies of pre -buried rod, tension rod and reinforcing rib, not only have improved the compression and the bending -resistant ability of brick body, still effectively restrained the expansion and the shrinkage of brick body, prevented the generation of crack.

The invention provides a tube component and a vascular intervention catheter with the same, a notch is formed in the tube component, the notch is provided with a first edge and a second edge, and the first edge and the second edge are oppositely arranged in the axial direction of the tube component; the first edge and the second edge are arc-shaped on the unfolding plane of the pipe component; any point is used as an original point, a straight line passing through the original point and perpendicular to the axial direction of the pipe component is used as an X axis, a straight line passing through the original point and parallel to the axial direction of the pipe component is used as a Y axis, a coordinate system is established, the track of the first side meets a function, the track of the second side meets a function, y1 is larger than or equal to y2, a is the maximum width value of the notch in the axial direction of the pipe component, and b is the outer circumference of the pipe component. The tracks of the first side and the second side meet the cosine functions (1) and (2) respectively, the distribution area of large stress on the pipe component can be increased, stress concentration on the pipe component is reduced, and the fracture resistance and durability of the pipe component are improved.

This invention provides a quick-connect balloon dilation catheter and a method for preparing the balloon dilation catheter. The quick-connect balloon dilation catheter includes a catheter seat, an outer tube connected to the catheter seat, and a balloon connected to the distal end of the outer tube. The outer tube has a metal tube body extending from the proximal end to the distal end, the metal tube body having a non-cutting segment at the proximal end and a cutting segment connected to the distal end of the non-cutting segment. The outer tube also has a polymer inner liner covering the inside of the cutting segment and a polymer sheath covering the outside of the cutting segment, such that the outer tube is integrally formed as a composite tube segment with a metal tube segment at the proximal end and a composite tube segment connected to the distal end of the metal tube segment, the composite tube segment having a quick-connect port penetrating both the inside and outside. This design improves the catheter's delivery and positioning accuracy.

The utility model discloses a novel micro catheter, and belongs to the field of medical instruments. Comprising a microcatheter body, the microcatheter body comprises an inner catheter layer, a middle layer and an outer sleeve layer, the middle layer is connected with the inner catheter layer and the outer sleeve layer, the microcatheter is characterized in that the outer sleeve layer is composed of a plurality of splicing sections, and the adjacent splicing sections of the splicing sections are spliced in a staggered mode. The outer sleeve layer is provided with the multiple splicing sections and the middle layer, the multiple splicing sections can be made of different materials according to needs, the size of the catheter is not changed, and the adhesion, smoothness, flexibility, torsion control, fracture resistance, tensile resistance and ellipticity resistance of the multi-layer structure such as the inner catheter layer, the middle layer and the outer sleeve layer can be remarkably improved; and an excellent clinical use effect is achieved.

The invention discloses a sustained-release material for improving the fracture resistance of a cement-based material and application, and belongs to the technical field of building material admixtures. The sustained-release material for improving the fracture resistance of the cement-based material comprises a solution A and a solution B, the solution A is formed by mixing an alkali-activated sustained-release capsule and a monomer solution; the monomer solution is an acrylamide solution or a sodium acrylate solution, and the solution B is an oxidizing initiator solution; the alkali-activated sustained-release capsule comprises an inner core, a middle coating layer and an outer coating layer, the inner core is nano silicon dioxide, the middle coating layer is nano silicon dioxide modified by tertiary amine groups, and the outer coating layer is nano silicon dioxide; the mass ratio of the alkali-activated sustained-release capsule to the active ingredients in the monomer solution to the active ingredients in the solution B is (1-30): 30 (0.03-0.3). The sustained-release material is wide in raw material source, safe and environment-friendly, the preparation process is simple and easy to control, and the sustained-release material can improve the fracture resistance without influencing hydration of the cement-based material.

The invention discloses a large-diameter self-expansion steel pipe concrete pile and a preparation method thereof, belongs to the technical field of pile foundation pouring, and solves the problems that an existing cast-in-place large-diameter concrete pipe pile is poor in bearing capacity and is easy to bend when bearing a horizontal load. The device specifically comprises an expansive concrete pipe, wherein an inner pipe is arranged on the inner side of the expansive concrete pipe; a concrete pile cap is arranged on the top of the expansive concrete pipe. The inner pipe is arranged on the inner side of the expansive concrete pipe, the mode that the inner pipe is combined with the expansive concrete pipe is adopted, and the bearing capacity of the pile body is enhanced; and the bending resistance and the shearing resistance of the pile body are improved. In the preparation method, after the expansive concrete is poured, the outer pipe is pulled out, due to the expansibility of the expansive concrete, the friction force between the pile body and the soil body can be increased, and the stability of the pile foundation is improved; and the inner pipe is reserved, the inner pipe generates constraint stress on the internal soil body, and meanwhile, the expansive concrete is limited, so that the necking soil squeezing effect of the soil body caused by expansion of the expansive concrete is avoided.

The present invention belongs to the technical field of engineering building materials, and specifically relates to a road surface rapid repair mortar of composite magnesium cement and alkali-activated slag and a preparation method thereof; wherein the road surface rapid repair mortar comprises: dead-burned magnesium oxide, dipotassium hydrogen phosphate, disodium hydrogen phosphate, domestic waste incineration slag, nano-colloidal silica, fine aggregate, water, nano-cellulose and water reducer. The present invention utilizes the hydration intermediate product of magnesium phosphate gelling material to react with nano-colloidal silica to generate potassium silicate and sodium silicate, stimulates domestic waste incineration slag, and generates highly water-resistant C-A-S-H gel. This not only effectively utilizes domestic waste incineration slag, practices the concept of green environmental protection development, but also improves the water resistance of magnesium phosphate gelling material. Similarly, due to the addition of nano-cellulose, not only the volume stability of the mortar is improved, but also its anti-permeability performance is significantly improved. Therefore, it has positive significance for realizing the preparation and application of magnesium phosphate gelling material in the field of rapid road surface repair.

The invention discloses a pH response initiator for improving the mechanical property of a cement-based material as well as a preparation method and application of the pH response initiator, and belongs to the technical field of building material admixtures. The preparation process of the initiator comprises the following steps of: dissolving a shell layer material which can be hydrolyzed under an alkaline condition and is used as an oil phase solution in a solvent; mixing the water-soluble polymer aqueous solution and the coated small molecules to obtain an aqueous phase solution; under the action of an emulsification shearing machine, pouring the water-phase solution into the oil-phase solution, and emulsifying to form an emulsion; adding a diluted aqueous solution of a water-soluble polymer into the emulsion, and continuously emulsifying; heating until the solvent is completely volatilized to obtain turbid liquid; filtering and cleaning to obtain capsule particles. The initiator provided by the invention realizes adjustability and controllability of in-situ polymerization, effectively improves the microstructure of the cement-based material, and endows the cement-based material with better fracture resistance without reducing the compression resistance of the cement-based material.

The application discloses an impact-resistant and wear-resistant epoxy resin modified mortar and a preparation method thereof, and relates to the technical field of mortar.The application comprises the following raw materials in mass parts: deionized water 170-190 parts, modified boron nitride synergist 13.13-14.38 parts, water reducing agent 0.8-1.2 parts, tributyl phosphate 0.6-0.8 parts, composite modified porous polysiloxane microspheres 26.25-28.75 parts, water-based epoxy resin 21-23 parts, Portland cement 420-460 parts, sulphoaluminate cement 105-115 parts, concrete expansive agent 15.75-17.25 parts, river sand 1050-1150 parts, water-based epoxy curing agent 27.3-29.9 parts.The introduction of the modified boron nitride synergist and other raw materials in the application simultaneously improves the compressive strength, the bending strength, the impact strength, the wear resistance, the anti-cavitation ability, the aging resistance and the alkali corrosion resistance.

The utility model discloses an assembly type fracture-resistant light partition board which comprises a wall body, an embedded plate is arranged on one side of the wall body, a connecting plate is arranged on the other side of the wall body, through holes are formed in the wall body, grooves are symmetrically formed in the connecting plate, the embedded plate can be clamped and embedded in the grooves, the through holes vertically penetrate through the wall body, the cross sections of the through holes are triangular, and the through holes are distributed at equal intervals in a staggered mode. The section of the embedded plate is in an isosceles trapezoid shape, a clamping groove is formed in the embedded plate, the position of the groove corresponds to that of the embedded plate, a mounting groove is formed in the connecting plate, a clamping block is arranged in the mounting groove, a limiting base is arranged on one side of the clamping block, the clamping block can be fixedly clamped in the clamping groove in an embedded mode, and the inclined face of one side of the clamping block is parallel to the inclined face of the groove. The triangular through holes are formed in the wall body, the weight of the wall body is reduced, meanwhile, the fracture resistance of the wall body is improved, meanwhile, due to the arrangement of the embedded plates and the connecting plates, rapid installation can be achieved, and practicability is higher.

The invention discloses a non-intumescent fire retardant coating for a steel structure and a preparation method of the non-intumescent fire retardant coating, and solves the technical problems of low environmental protection property, relatively low bonding strength and relatively high surface density of part of existing fire retardant coatings. The environment-friendly building material is prepared from the following components in parts by mass: 75 to 100 parts of base material, 90 to 180 parts of aggregate, 10 to 15 parts of reinforced fiber, 8 to 15 parts of mica powder, 6 to 10 parts of pigment, 0.5 to 1.5 parts of flame retardant, 7 to 15 parts of water glass, 3.5 to 4 parts of attapulgite powder and 90 to 200 parts of water. The base material, the aggregate, the reinforced fiber, the mica powder, the pigment, the flame retardant, the water glass and the attapulgite powder are all inorganic components, do not contain toxic and harmful substances such as benzene, methylbenzene, dimethylbenzene and soluble heavy metal, are stable in property, are matched for use, do not generate harmful gas at high temperature, and are high in environmental protection property; the aggregate and the reinforcing fiber used in the invention are light materials, and the overall surface density of the fireproof coating is low; through the synergistic effect of the water glass, the mica powder and the attapulgite powder, the bonding strength of the fireproof coating is improved.

The antibacterial and antifouling furniture board comprises a decorative surface layer, reinforcing layers, a solid wood layer and a cork wood layer, the solid wood layer comprises a plurality of solid wood boards, the solid wood boards are connected end to end to form a continuously-bent wave shape, a triangular structure is formed between every two adjacent solid wood boards, the reinforcing layers are arranged on the upper side and the lower side of the solid wood layer, and the cork wood layer is arranged on the upper side and the lower side of the solid wood layer. The reinforcing layer comprises a plurality of rib rods which are arranged at equal intervals and are perpendicular to the solid wood board, the cork layer is connected with the solid wood layer and the reinforcing layer, and the decorative surface layer is arranged on the side, away from the solid wood layer, of the reinforcing layer; by the adoption of the technical scheme, the solid wood layer composed of the multiple solid wood boards can play a good anti-compression role under external pressure due to the stability of triangles, the rib rods are perpendicular to the solid wood boards, the fracture resistance of the board can be greatly improved, and therefore the overall strength of the board is improved, the reinforcing layer and the solid wood layer are stably connected through the cork wood layer, and the service life of the board is prolonged. And the integrality of the plate is higher.

The utility model relates to the field of bridges, and discloses an assembly type bridge deck pavement structure which comprises a column body, an upper paving layer and a lower paving layer, supporting blocks are fixedly connected to the two sides of the column body, the lower paving layer is installed at the top of the column body, limiting ribs are fixedly connected to the two sides of the bottom of the lower paving layer, and a damping layer is arranged at the top of the lower paving layer. A reinforcing layer is arranged at the top of the damping layer, reinforcing ribs are arranged in the reinforcing layer, a reinforcing layer is arranged at the top of the reinforcing layer, an upper auxiliary laying layer is arranged at the top of the reinforcing layer, and weather-proof layers are arranged on the peripheries of the upper auxiliary laying layer and the lower auxiliary laying layer. Through cooperative use of the reinforcing layer, the reinforcing layer, the weather-proof layer and the supporting blocks, the protection effect of the structure can be effectively improved, the possibility that the structure is affected and damaged by the environment is reduced, the stable effect of the structure is guaranteed, and the service life of the structure is prolonged.

The invention discloses a water permeable brick with high water permeability and high strength. The water permeable brick comprises a bottom layer and a surface layer which are sequentially arranged from bottom to top, the bottom layer slurry is prepared from the following raw materials in parts by mass: 50 to 55 parts of coarse aggregate, 30 to 35 parts of fine aggregate, 3 to 5 parts of mineral powder, 3 to 5 parts of industrial waste residue, 9 to 12 parts of fly ash, 3 to 5 parts of sodium silicate, 0.8 to 1 part of calcium carbonate whisker, 0.2 to 0.5 part of fiber, 0.7 to 1 part of retarder, 2 to 3 parts of water and 0.1 to 0.2 part of water reducing agent I; the surface layer slurry is prepared from the following raw materials in parts by mass: 55 to 65 parts of quartz sand, 15 to 20 parts of white cement, 0.1 to 0.5 part of pigment, 1 to 2 parts of water and 0.1 to 0.2 part of water reducing agent II. According to the high-water-permeability and high-strength water permeable brick provided by the invention, cement does not need to be used as a cementing material for the bottom layer slurry, and on the premise that the production cost is greatly reduced, the water permeable brick not only has high water permeability and high strength, but also has excellent wear resistance.

The invention provides an aluminum-based silicon carbide composite plate strip, and relates to the technical field of plate strips, a high-temperature transition layer is used for realizing gradient transition of high-temperature resistance and thermal stress, can effectively relieve high-temperature temperature difference stress between a zirconium modified pure aluminum anti-cracking main body layer and the high-temperature transition layer of a plate, and avoids deformation and cracking of the whole structure of the plate due to overlarge cold and hot gradient; the low-temperature buffer layer is matched with the boron fiber enrichment transition layer, so that the high-temperature-resistant strength of the transition area can be further improved, the boron fiber enrichment transition layer is prevented from structural instability at high temperature, the low-temperature buffer layer can realize gradient transition of low-temperature resistance and stress, and the low-temperature shrinkage stress of the lower layer of the plate can be effectively relieved; the temperature-resistant composite main body layer can bear the stress of all upper-layer structures and uniformly disperse the stress to the whole region, stable support is provided for all upper-layer functional structures, meanwhile, the temperature resistance of the temperature-resistant composite main body layer is complementary with the temperature-resistant and low-temperature-resistant structures of all the layers, and finally the comprehensive effects of heat resistance, cold resistance, cracking resistance and protection of the plate are achieved.

The present invention relates to the technical field of α-hemihydrate gypsum production, and in particular to an organic crystal-changing agent for preparing α-hemihydrate gypsum from phosphogypsum, and a preparation method and application thereof, wherein compound A and compound B are dissolved in an organic solvent, heated to 45-85° C. under nitrogen protection, compound C is added, and the reaction is continued for 2-4 hours to obtain an organic crystal-changing agent, which is used for the preparation of α-hemihydrate gypsum. The present invention contains multiple carboxyl and sulfhydryl functional groups in an organic crystal-changing agent, which can form a complex with metal ions, and can be combined with metal ions through coordination, thereby reducing the generation of α-hemihydrate gypsum crystal defects, thereby obtaining a regular and stable crystal structure; by adjusting the pH value of the crystal-changing agent solution, the amount of the organic crystal-changing agent added, the reaction temperature, etc., columnar α-hemihydrate gypsum can be prepared, and the compression and flexural properties of the α-hemihydrate gypsum can be significantly improved.

The invention discloses a composite slag-based concrete admixture and a preparation method thereof, the composite slag-based concrete admixture comprises the following raw materials by weight: 50-70 parts of modified composite slag, 15-25 parts of fly ash, 10-15 parts of kaolin, 10-15 parts of an additive, and 15-25 parts of modified composite fiber; wherein the admixture is formed by mixing glass beads, latex powder, coal gangue and aluminum sulfate according to the mass ratio of (15-25): (10-15): (8-12): (5-9). According to the admixture, phosphorus slag and iron-ore slag are used as raw materials, the surface is modified through a chemical method, meanwhile, fly ash, kaolin, coal gangue, latex powder, glass beads, aluminum sulfate and modified composite fibers are used as auxiliary materials, high-value recycling of the phosphorus slag and the iron-ore slag is achieved, and the internal structure of concrete is optimized; the mechanical property, the crack resistance and the salt corrosion resistance of the concrete are improved.

The utility model discloses a flash barrier which comprises an installation block and a main plate body, the installation block is provided with an insertion groove corresponding to the main plate body, the outer wall of the installation block is provided with two installation grooves which are symmetrically arranged, transmission rods are rotationally connected in the installation grooves through rotating shafts, and one ends, close to the main plate body, of the transmission rods are fixedly connected with clamping blocks. A clamping groove corresponding to the clamping block is formed in the main plate body, a first wedge block is fixedly connected to the end, away from the clamping block, of the transmission rod, a sliding rod is slidably inserted into the mounting groove, one end of the sliding rod is fixedly connected with a second wedge block corresponding to the first wedge block, the sliding rod is sleeved with a spring, and the two ends of the spring abut against the second wedge block and the inner wall of the mounting groove correspondingly. A connecting rod is arranged at the end, away from the main plate body, of the mounting block, and a plurality of connecting ports are formed in the connecting rod. According to the utility model, through the arrangement of the fixed dismounting structure, the flash barrier can be conveniently dismounted and maintained, so that the maintenance efficiency of the flash barrier is effectively improved.

The invention relates to the technical field of building materials, and discloses a preparation process of super-retarded cement stabilized macadam, which comprises the following steps: selection and surface treatment of raw materials: selecting super-retarded cement, graded macadam, fly ash or mineral powder, a retarder and water, and carrying out nanoscale surface treatment on the macadam to improve the binding power of the macadam and cement paste, so as to obtain the super-retarded cement stabilized macadam; the ratio of the raw materials is as follows: the super-retarding cement accounts for 4%-6% of the total weight of the mixed material, and 0.1%-0.3% of a retarder is doped; the particle size range of the graded broken stone is 5-31.5 mm, and the graded broken stone accounts for 55-65% of the total weight of the mixed material; and the fly ash or mineral powder accounts for 8-12% of the total weight of the mixed material. By adopting the super-retarding cement, three-dimensional dynamic stirring and vacuum degassing processes, the problem of unstable structure caused by non-uniform stirring and bubble residue in the construction process of the traditional cement stabilized macadam material is effectively solved. The three-dimensional dynamic stirring device can be used for mixing in multiple directions, so that materials such as cement, macadam and fly ash are more uniformly distributed.

The utility model provides a network cable protection mechanism, and belongs to the technical field of network cable protection. The network cable protection mechanism comprises a network cable and two crystal heads, the two crystal heads are installed at the two ends of the network cable respectively, a protection structure is arranged on the outer walls of the network cable and the crystal heads, the protection structure is composed of an anti-folding piece, an anti-damage piece, two clamping pieces and two protection sleeve heads, the inner wall of the anti-folding piece is attached to the outer wall of the network cable, the outer wall of the anti-damage piece is irregular, and the protection sleeve heads are arranged on the outer wall of the anti-folding piece. The inner wall is fixedly connected with the outer wall of the anti-folding piece, the two ends of the anti-folding piece and the two ends of the anti-damage piece are fixedly connected with one ends of the two protective sleeve heads through the two clamping pieces respectively, and the two protective sleeve heads are arranged on the outer walls of the two crystal heads in a sleeving mode respectively. Through cooperative work of the anti-bending piece, the anti-damage piece, the two clamping pieces and the two protective sleeve heads, the network cable and the crystal head can be protected at the same time, the network cable and the crystal head can effectively resist external physical impact and abrasion, and the anti-bending capability of the network cable is remarkably enhanced.

The application relates to the technical field of building plugging materials, and particularly provides a long-operable-time plugging material, which is prepared from the following raw materials in terms of total weight: 0.02-3% of a retarder, 0.005-2% of a calcium salt, 0.001-1% of a cellulose ether and cement supplementing to 100%. By optimizing the types of the retarder, the calcium salt and the cellulose ether and by stipulating the relative amounts of the retarder, the calcium salt and the cellulose ether, the quick-setting type plugging material has a relatively long retarding time, and the anti-bending performance, the anti-permeation performance, the bonding performance, the heat resistance and the freeze-thaw cycle resistance of the material after solidification are effectively improved.

The present application relates to the technical field of fireproof boards, and specifically discloses a low-density weather-resistant fireproof board and a preparation method thereof. A preparation method of a low-density weather-resistant fireproof board, using diatomaceous earth as silicon and quicklime as calcium, through wet grinding under the action of an auxiliary agent hafnium oxychloride, and heat treatment in an autoclave to obtain a hollow hard calcium silicate with a needle-like fiber surface, and then premixed with an olefinic silica aerogel precursor, aged, and then subjected to a two-stage high-pressure desolventization to obtain a multi-level nanoporous hard calcium silicate filled with olefinic silica aerogel, and finally mixed with kaolin, mercaptolated waste paper fiber, benzophenone, and flame retardant for compression molding and curing to obtain a low-density weather-resistant fireproof board. The low-density weather-resistant fireproof board prepared by the present application has the advantages of fireproof, light weight, weather resistance, water resistance, impact resistance, and strong flexural resistance.