76results about How to "Tightly blocked" patented technology

The invention discloses an advance support fast construction method in shallow tunnelling loose pebble bed. A guide rail type independent rotary rock drill and a triangle drilling rig are adopted, and a self-advancing hollow grouting anchor bar is adopted to drive the advance support rod body; multi-hole spacing grouting is adopted, and appropriate double grout matching is selected. The invention has the beneficial effects that: part of pebble can be impacted to be crushed or be extruded into a hole, the problems of shifting and aligning of heavy duty drill in a narrow underground tunnel are effectively solved; not only grouting speed is increased, but also grout diffusion can be better controlled; the method can adapt loose pebble stratum well, not only perfect diffusion effect of grouting can be achieved, but also single-hole long-distance diffusion can be controlled, and reinforcing in unpermitted range can be achieved.

The invention innovatively provides a support row pile construction method for closing and water stop of deep foundation pits. The support row pile construction method is characterized in that positioning and paying off are performed at a support pile site according to designed positions so as to make pile position marks; then a row pile guide wall is constructed; I-sequence pile hole construction and pouring are performed; then drilling construction is performed at II-sequence pile hole positions between every two adjacent I-sequence pile holes; when II-sequence pile hole construction is performed, a drilling component of which the outer side is provided with a wire brush is adopted, and concrete is used for pouring; and then grouting pipes on two sides of I-sequence pile steel reinforcement cages are grouted, so that clearances among the adjacent piles are sealed. The support row pile construction method is applicable to working conditions of foundation pit support row piles that the level of underground water is higher than an excavation surface; the adjacent piles are lap-jointed, and water stop and soil retaining support are performed by utilizing the own concrete of pile bodies; grouting closing is performed among the piles by adopting a grouting technique, so that the clearances among the piles are sealed closely, and the water stop effect is ensured; a water stop curtain does not need to be arranged separately, so that construction cost is lowered; the construction period is obviously shortened; and the water stop effect of the foundation pit support row piles is improved.

The invention relates to a wall template bottom plugging device, a template supporting system and a formwork construction method, and relates to the technical field of building construction template structures, installation and protection. The wall template bottom plugging device comprises a locker, a grouting stop structure, and an adjusting structure respectively connected with the locker and the grouting stop structure, wherein the grouting stop structure comprises a flexible sealing body; the adjusting structure comprises an adjusting frame, a first adjusting screw rod and a second adjusting screw rod with one ends being respectively in threaded connection with the adjusting frame, and a first connecting body for tightly pressing the grouting stop structure; the rotation directions ofthe first adjusting screw rod and the second adjusting screw rod are opposite; and the central axes of the first adjusting screw rod and the second adjusting screw rod are collinear, and are inclinedtowards a part to be plugged. The template supporting system comprises the wall template bottom plugging device detachably connected with a steel pipe main keel on the bottommost part. The formwork construction method adopts the template supporting system. According to the wall template bottom plugging device, the template supporting system and the formwork construction method provided by the invention, the technical problem of a poor grouting stop effect of a plugging device in the prior art can be solved, and an effect on tightly plugging is achieved.

The invention discloses a high-filtration-loss plugging agent specially used for oil-based drilling fluid. The high-filtration-loss plugging agent is prepared from, by weight, 5-10 parts of fiber, 40-70 parts of a porous inert material, 10-25 parts of a percolating material and 5-10 parts of a filter aid; the porous inert material is a mixture of ceramic powder with the particle size of 180 meshesand ceramic powder with the particle size of 250 meshes, and the weight ratio of the 180-mesh ceramic powder to the 250-mesh ceramic powder is (4-6): (3-5); the percolating material is a mixture of zeolite powder with the particle size of 100 meshes and zeolite powder with the particle size of 150 meshes, and the weight ratio of the 100-mesh zeolite powder to the 150-mesh zeolite powder is (2-4):(4-7); the fiber is polyamide fiber, the length-diameter ratio is 5-50: 1, and the diameter is 0.5-15 microns; the filter aid is lime powder with the particle size of 200 meshes. The above componentsare uniformly mixed to obtain the high-filtration-loss plugging agent specially used for oil-based drilling fluid. The plugging agent disclosed by the invention is prepared by mixing various materials such as the fiber, the porous inert material, the percolating material and the filter aid, and is wide in application range, simple in plugging construction, high in safety and quick in effect.

The invention discloses a pipeline isolator which is applied to the interior of a pipeline. The pipeline isolator comprises a first elastic expansion plug and a first squeezing block, wherein the outer wall of the first elastic expansion plug is matched with the inner wall of the pipeline, a groove is formed in one side of the first elastic expansion plug, the first squeezing block is arranged in the groove, and the first squeezing block is used for squeezing the inner wall of the groove. When the pipeline isolator works, the inner wall of the groove of the first elastic expansion plug is squeezed by the first squeezing block, the first elastic expansion plug is expanded, the outer diameter of the first elastic expansion plug is enlarged, and the outer wall of the first elastic expansion plug is tightly attached to the inner wall of the pipeline. According to the pipeline isolator, the first elastic expansion plug before the expansion is pushed into the interior of the pipeline easily, the first squeezing block is squeezed into the groove of the first elastic expansion plug through external force, the inner wall of the groove is squeezed, the first elastic expansion plug is squeezed and expanded until the outer wall of the first elastic expansion plug is tightly attached to the inner wall of the pipeline, and thus the pipeline is sealed effectively. The pipeline isolator is simple in structure, fast in mounting, capable of bearing large pressure, compact in sealing and long in sealing time.

A fan and a hood of a range hood are installed in one, the appearance is bulky, and the outer packing can not be often changed for new. So many structural defects exist in the integrated installation. When the split installation of the fan and the hood is applied, noise is far away from ears, an exhaust pipe can be directly led outdoors, a ball rolling type magnetic lock check valve is arranged at the exit of the exhaust pipe to eliminate other kitchen odor, and the smoke-collection hood is lifted by a smoke pipe, thus a plurality of practical effects are derived. However, the structural transformation of household electric range hoods will affect thousands of families. A general movement for split-type household electric range hood is developed to promote the transformation of conventional household range hoods into the split structure and realize the upgrading.

The invention discloses a cable hole plugging device for a power cabinet. The cable hole plugging device comprises a trough-type shell, wherein a threading hole is formed in an inner-trough bottom surface of the trough-type shell; the inner-trough bottom surface of the trough-type shell is symmetrically provided with a plurality of groups of slideways in two sides of the threading hole; a slideable adjusting slide plate is arranged in each slideway; rack-shaped clamping teeth are arranged in the middle of the upper surface of each adjusting slide plate; two rotating shafts are symmetrically arranged at two sides in the trough of the trough-type shell; and locating cams are respectively arranged on the rack-shaped clamping teeth on each adjusting slide plate and are used for achieving a location after the adjusting slide plates adjust. The cable hole plugging device for the power cabinet has the beneficial effects of being simple in structure and convenient to use; a gap after threading of the threading hole can be reduced to the minimal size by adjusting the size of the threading hole through the adjusting slide plates; the adjusting slide plates can be located by rotating the locating cams by the clamping teeth in the upper surfaces of the adjusting slide plates; a threading opening can be tightly plugged by matching with fireproofing mud; the fireproofing mud can be prevented from leaking through a support of the trough-type shell; the cable hole plugging device can be repeatedly used; and the use cost is low.

The invention belongs to the technical field of hole sealing moulds, and particularly relates to a mould special for blocking a wall penetrating hole. The mould comprises circular steel and a reinforcing device; one end of the circular steel is welded with a split bolt; the other end of the circular steel is welded with a fixed thick steel plate; a PVC sleeve is arranged outside the circular steelin a sleeving manner; a sliding steel plate mould is mounted between the PVC sleeve and the fixed thick steel plate; the two sides of the sliding steel plate mould are respectively and symmetricallyconnected with two L-shaped steel plate moulds through hinges by mounting a sliding ring on the circular steel in the sleeving manner; the reinforcing device comprises a clamp shaped like a Chinese character Shan, a multilayer plate I, a multilayer plate II, square timbers and a fixing nut; the clamp shaped like a Chinese character Shan is arranged on the split bolt in the sleeving manner; the multilayer plate I is arranged outside the PVC sleeve in the sleeving manner; the multilayer plate I is connected with the multilayer plate II through a hinge; two square timbers are symmetrically clamped on the two sides of the multilayer plate I and the clamp shaped like a Chinese character Shan and the two sides of the PVC sleeve; and the fixing nut is screwed on the split bolt on the outer side of the clamp shaped like a Chinese character Shan. The system solves the problems of inconvenience in blockage and non-tight blockage of a wall penetrating hole of a high-rise building, and can be widely applied to various construction places.

The invention belongs to the technical field of fire water supply, in particular to a building water supply and drainage anti-blocking device. Aiming at the problem that an existing filtering device is not provided with a real-time cleaning device for a filter screen or a filter element, a scheme as follows is proposed. A fire pool in a cylindrical structure is included, a cover plate is arrangedat the top end of the fire pool, a purpose-made bearing seat internally provided with a cavity in a cylindrical structure is embedded in the middle of the cover plate, a transfer pipe is rotatably connected to the middle of the purpose-made bearing seat, four supporting bars which are distributed in a centripetal mode are fixed to the peripheral outer wall of the transfer pipe and close to the bottom end of the transfer pipe, and the same fixed ring is fixed to the ends, far away from the transfer pipe, of the four supporting bars. When the building water supply and drainage anti-blocking device is used, some garbage is blocked on the filter screen after the water is discharged from the bottom of the fire pool for a period of time, and at the moment, only the transfer pipe needs to be controlled so that a brush rod attached to the surface of a conical filter cylinder is driven to continuously clean the garbage blocked on the filter screen.

The invention discloses a device for detecting the pressure of water in a concrete pipe. The device comprises a bearing mechanism and a high pressure water supply mechanism, sockets are distributed atthe top ends of steel columns on the two sides respectively, and the steel columns are sleeved with a rear steel cross beam; a jack is perpendicularly connected with the center of the lower portion of the steel cross beam, an opening plugging device is connected with the lower end of the jack, and an air vent and a water inlet are formed in the opening plugging device; and a water reservoir is arranged, a water pump is mounted, and after a water outlet of the water pump is sequentially connected with a pressure pump, a water inlet valve and a pressure meter through a high pressure water inletpipe, the tail end of the water pump is fixed to the water inlet of the opening plugging device in a sealing mode. An opening plugging steel plate is high in strength, not prone to deforming, can plug tightly, and thus the test effect is guaranteed. The device for detecting the pressure of water in the concrete pipe is convenient to mount and dismount, quick and convenient, the test time is shortened, the working efficiency is improved, and the test cost is lowered. The device replaces the operation procedures of a traditional detection device, reduces the investment of labor force and material sources, promotes the health development of scientific test and detection industries, and provides a powerful basis for scientific research.

The invention belongs to the technical field of logistics security and protection, and particularly relates to a fire isolation device for logistics park security and protection. Aiming at the problemthat most of existing fire isolation devices are arranged in advance in a park and occupy a large space to reduce the smoothness of the logistics park, the invention provides the following scheme that the fire isolation device comprises a base with a cuboid structure, and a cavity is formed in the base; the base is buried underground; bearing pedestals are fixedly arranged at the positions, closeto the two ends, of the inner wall of the bottom of the base, and symmetrical tapered roller bearings are embedded in the opposite ends of the two bearing pedestals respectively; a same winding roller is rotationally connected between the two tapered roller bearings, and fireproof cloth is wound around the outer wall of the circumference of the winding roller; cotton cloth is fixedly arranged onthe two opposite sides of the fireproof cloth; and a strip-shaped hole matched with the fireproof cloth in width is formed in the middle part of the upper surface of the base. The two sides of the fireproof cloth can be cooled by spraying water while fire is isolated, and the fireproofing grade of the same material is increased.

The invention discloses a tension resistant fireproof putty and a preparation method thereof. The putty is prepared from, by weight, 18-25 parts of chlorinated paraffin, 10-13 parts of rosin modified phenolic resin, 5-10 parts of butyl rubber, 30-35 parts of diethyl silicone oil, 20-35 parts of a silicone acrylic emulsion, 0.5-3.5 parts of a titanate coupling agent, 1.5-3.5 parts of calcium lignosulfonate, 35-40 parts of pitchstone powder, 10-20 parts of bentonite, 10-20 parts of attapulgite, 0.3-0.5 parts of short carbon fiber and 0.3-0.5 parts of polypropylene filament fiber. The tension resistant fireproof putty has the advantages of high fireproofing performance, strong plasticity, good flexibility, impact resistance, good flue gas tight effect and high fireproofing efficiency, and slightly expands under the action of a high temperature when a fire hazard appears to form a solid fireproof heat insulation layer in order to tightly plug various openings and slits and effectively prevent flame propagation and flue gas propagation.

The invention discloses a blasting method and application of using shear thickening liquid as blockage of blasting blast holes. The method comprises the steps of filling the blasting blast holes withthe shear thickening liquid, and using the shear thickening liquid to completely cover or partially cover gas blasters in the blasting blast holes; using the shear thickening liquid to completely cover the blasting blast holes to completely fill the gas blasters in the blasting blast holes; detonating the gas blasters. The blasting method applies the shear thickening liquid as a blast hole blockage material for blocking the blast holes, the blockage effect of the blast holes is good, flying stones and splashing are hardly generated during the blasting process, the blasting degree is deep, theblasting efficiency is high, the method is not limited to the arrangement of the blasting blast holes, the freedom of arrangement of the blasting blast holes is more flexible, the blasting process ismore moderate, strong air shock waves are nor generated, damage to the surrounding environment and workers is not caused, blasting noise is small, and the blasting process is safe.

The invention discloses a device for preventing tumor progression after bone tumor biopsy. The device comprises a T-shaped plugging device which is integrally formed by a plugging head and a base, wherein the plugging head is wrapped by a layer of titanium alloy self-tapping threads; a through hole is formed between the top of the base and the bottom of the plugging head; a plugging rod with a straight line or cross shaped groove in the top and for plugging the through hole is in threaded connection with the through hole; a U-shaped hole is formed in the bottom of the plugging rod; a layer of absorbable medical membrane wraps the bottom of the U-shaped hole. With the combination of a bone substitute material and a titanium alloy, a pore channel or a needle channel left after bone tumor puncture can be permanently and tightly plugged, anti-tumor medicines can be put into the U-shaped hole in advance, and once the pore channel or the needle channel is plugged, the anti-tumor medicines can be dissolved within a certain time by using the absorbable medical membrane and has the lasting treatment effect within a partial plugged area.

The present invention is a 10kV overhead insulated wire rapid insulation recovery device and its use method, comprising a hard insulating shell, waterproof insulating cement, the hard insulating shell is cylindrical, one end of which is open, and the opening of the hard insulating shell is Connected by the locking device, the waterproof insulating glue is evenly coated on the inner peripheral surface of the hard insulating shell. The invention is easy to operate and is not affected by the technical level of the construction personnel. It can be fixed firmly only by fastening the lock buckle, and the installation quality is consistent; the insulation performance is good, and the insulating glue and the hard insulating shell are double-layer insulated, and its design insulation capacity The insulation ability is higher than that of the wire insulation layer; the anti-aging ability is strong, and the soft insulating cement with weak corrosion resistance but strong insulation ability is reliably protected by the hard insulating shell with strong corrosion resistance but weak insulation ability, which is extremely Greatly prolong the service life of insulating cement.

The invention discloses a hole opening and blocking method of a gas pipeline with pressure. Two semicircular fasteners are manufactured to clamp a target gas pipeline, the gas pipeline and the two semicircular fasteners are welded and sealed, and hole opening and blocking operations are carried out on the gas pipeline with pressure in normal operation by using a tool such as a blocking bracket, a normal spanner and the like. The hole opening and blocking method has the advantages of convenience in operation, high security, simpleness in construction, tight blocking, stability and reliability.

The invention discloses a filtering and cleaning method of a mechanical filter, relates to the technical field of filter equipment, and aims at solving the problem that the cleaning is not complete asthe existing mechanical filter cannot clean and filter at the same time and the flushing mode is single. The mechanical filter comprises tank bodies, a water inlet and outlet member, an upper-layer air intake tube, a lower-layer air intake tube, a reverse water inlet tube, a regulating turntable, a lifting motor, a blow-off tube and a filtering member; the tank bodies are symmetrically arranged through a support rod, the tank bodies are connected through the water inlet and outlet member, the upper-layer air intake tube, the lower-layer air intake tube and the reverse water inlet tube are arranged on the outer side wall of the tank body, the regulating turntable is arranged at the upper end of the tank body, the lifting motor and the blow-off tube are arranged at the lower end of the tankbody, and the filtering member is arranged at the inner part of the tank body. The mechanical filter solves the problem that the cleaning is not complete as the existing mechanical filter cannot clean and filter at the same time and the flushing mode is single, and the effects of uninterruptedly filtering and completely self-cleaning are achieved.

The invention discloses a blocking mechanism of an oil level indicator pipe. The blocking mechanism comprises a front sleeve body and a back sleeve body, the front portion of the back sleeve body is inserted into a hole of the front sleeve body, a spring is arranged between the front end of the back sleeve body and the inner end face of the front sleeve body, an annular groove is arranged in the inner side of the back portion of the front sleeve body, the annular groove is located in the outer side of the front portion of the back sleeve body, the diameter of the annular groove is gradually changed smaller from the front end to the back end, a hole is formed in the front portion of the back sleeve body, a steel ball is located in the hole, a screw rod is connected with the inner hole of the back sleeve body in a threaded mode, a blocking ring is connected with the front end of the screw rod, and a hand wheel is connected with the rear end of the screw rod. The blocking mechanism is simple in overall structure, tight in blocking and convenient to operate.

The invention relates to the technical field of engineering blasting, and particularly discloses an automatic processing device for blast holes with karst caves. The automatic processing device comprises a capsule, a telescoping mechanism and a fixed box; the telescoping mechanism is arranged in a space in the capsule; the top of the telescoping mechanism is fixed with the top of the capsule; thetelescoping mechanism can stretch along the horizontal direction; a plunger is fixed at the lower end of the telescoping mechanism; the fixed box is fixed to the bottom of the capsule; a water inlet hole matched with the plunger is arranged on the fixed box; the fixed box communicates with the interior of the capsule through the water inlet hole; an oxygen generating agent is filled in the fixed box, and the oxygen generating agent is in contact with water to generate a large amount of oxygen; the capsule is filled with water; a first pull rope is fixed to the top of the telescoping mechanism;scales are arranged on the first pull rope; a second pull rope is fixed to the bottom of the telescoping mechanism; and the first pull rope and the second pull rope vertically and upwards penetrate through the top of the capsule and are in sliding sealing connection with the capsule. The invention aims to solve the problem that the effect is poor when a woven bag is adopted to block the blast holes.

The invention discloses a server cabinet based on big data. The server cabinet comprises a cabinet body, an air draft mechanism, an adjusting mechanism, a fixing mechanism, a heat dissipation mechanism and a heat extraction mechanism. The air draft mechanism is fixedly installed on the lower surface in the cabinet body, the adjusting mechanism is installed in the cabinet body, the fixing mechanisms are fixedly installed on the lower surface in the cabinet body and the upper surface of the adjusting mechanism respectively, the heat dissipation mechanism is arranged in the adjusting mechanism, and the heat extraction mechanism is fixedly installed on the top of the cabinet body. According to the server cabinet, the effect of preventing cold air in the lower box body from flowing back out of the cabinet body is effectively achieved, the interior of the cabinet body can be adjusted more conveniently and quickly, servers of any size smaller than the diameter of the flow guide cover can be cooled, and the servers of different sizes can be effectively fixed through the telescopic rods.

The invention discloses a mechanical filter, relates to the technical field of filter equipment, and aims at solving the problem that the cleaning is not complete as the existing mechanical filter cannot clean and filter at the same time and the flushing mode is single. The mechanical filter comprises tank bodies, a water inlet and outlet member, an upper-layer air intake tube, a lower-layer air intake tube, a reverse water inlet tube, a regulating turntable, a lifting motor, a blow-off tube and a filtering member; the tank bodies are symmetrically arranged through a support rod, the tank bodies are connected through a water inlet and outlet member, the upper-layer air intake tube, the lower-layer air intake tube and the reverse water inlet tube are arranged on the outer side wall of the tank body, the regulating turntable is arranged at the upper end of the tank body, the lifting motor and the blow-off tube are arranged at the lower end of the tank body, and the filtering member is arranged at the inner part of the tank body. The mechanical filter solves the problem that the cleaning is not complete as the existing mechanical filter cannot clean and filter at the same time and theflushing mode is single, and the effects of uninterruptedly filtering and completely self-cleaning are achieved.

The invention relates to a hole plugging device used for plugging a coal gas extraction hole, in particular to a bag type gas extraction hole plugging device which is suitable for all kinds of drill holes, is good in plugging effect and can adjust the depth of plugging the hole. The pocket type gas extraction hole plugging device comprises a bag body which is made of fabric with breathable and water seepage properties and a slurry injecting connector which is arranged on one end of the bag body which is of a hollow barrel structure; the bag body is sleeved outside a gas extraction pipe and comprises plugging sections and a slurry injecting section; the plugging sections are located at the two ends of the bag body; the slurry injecting section is arranged between the plugging sections; the outer diameter of the plugging sections is larger than the diameter of the gas extraction drill hole to be plugged; the outer diameter of the slurry injecting section is smaller than the diameter of the gas extraction drill hole to be plugged; slurry outlet holes are formed radially in the slurry injecting section; a hoop is sleeved on the opening of each end of the bag body; the inner diameter of the slurry injecting connector is 12mm; the number of the slurry outlet holes is ten; and the pore diameter of each slurry outlet hole is 2-3mm. The bag type gas extraction hole plugging device has the advantages that the structure is simple, the operation is convenient, the depth of plugging the hole is adjustable, the bag body is tightly fitted with a coal bed, and the plugging is tight.

The invention discloses environment-friendly solid garbage treatment equipment. A shell is included. A charging port is formed in the top of the shell. An electric push rod is fixedly connected to themiddle point position of the left side of the shell. A power rod is fixedly connected to the output end of the electric push rod. The right side of the power rod penetrates through the shell and extends into the shell to be fixedly connected with a swinging frame. The inner wall of the swinging frame is fixedly connected with a screen. Through mutual cooperation of the shell, the charging port, the electric push rod, the power rod, the swinging frame, the screen, a connecting rod, a pulverizing motor, a pulverizing shaft, pulverizing teeth, a collecting frame, a discharging port and a stop door, the environment-friendly solid garbage treatment equipment high in pulverizing efficiency is achieved; the charged garbage can be thoroughly pulverized; firstly, pulverized fine garbage falls downthrough the screen while large solid garbage is continuously pulverized till pulverizing is thorough, and therefore inconvenience caused by repeated charging is avoided.

The invention belongs to the technical field of fuel gas pipeline plugging, and more specifically relates to a plugging device and plugging equipment. The plugging device comprises a supporting cylinder, a sliding block screw rod and a sliding block are arranged in the supporting cylinder, the lower end of the sliding block can penetrate out of the supporting cylinder, the penetrating part is provided with a straight plane and a slope, the lower end of the supporting cylinder is connected with a plugging head through a pin shaft, and a rear cone plate sliding block, a rear cone plate, a rubberring, a front cone plate and a guide plate are arranged in the plugging head. According to the plugging device, the sliding block screw rod is driven so that the front cone plate and the rear cone plate can be used to extrude the rubber ring so as to complete plugging; and meanwhile, the plugging device can realize 90-degree steering in a pipeline through the guide plate. The invention further provides plugging equipment comprising the plugging device. The plugging equipment further comprises an inner rod used for driving the sliding block screw rod to rotate and a double-outlet-rod oil cylinder for driving the plugging head to move up and down and steer. The plugging equipment is long in service life, good in plugging effect and better in pipeline integrity keeping.

The invention discloses a temporary plugging gate and a temporary plugging method of a sewage pipeline. The temporary plugging gate comprises a conical cylinder, a front gate plate, a connecting rod and a support frame, wherein the connecting rod is arranged in the conical cylinder through the support frame; one end of the conical cylinder is provided with a rubber pad; a bolt hole is formed in the front gate plate; a threaded hole corresponding to the bolt hole is formed in one end of the connecting rod; and the front gate plate is arranged at one end of the conical cylinder and fixed througha bolt. The temporary plugging gate is suitable for plugging construction of the sewage pipeline under a sewage well, the gate can be plugged more tightly and firmly under the action of water pressure during plugging operation, an original sewage structure is not damaged in the mounting and dismounting process, the plugging and dismounting method is simple and easy to operate, and the plugging efficiency and the plugging effect are high; and the temporary plugging gate is simple in overall structure, low in cost and easy to mount and dismount, guarantees safe plugging, and has good application prospects.

The invention discloses a blasting blocking dust fall device. The blasting blocking dust fall device comprises a water cannon bag body and a water cannon bag special tool; and the water cannon bag body is provided with a water injection cavity, a water injection channel cavity, a water injection channel, a water injection channel closed bag layer, a first-section water cannon bag, a water bag partition cavity, a high-pressure water channel, a second-section water cannon bag, a water cannon bag end air bag and an air nozzle. According to the blasting blocking dust fall device, the water cannonbag body is filled with high-pressure water, the contact area between the outer wall of the water cannon bag body and the inner wall of a blast hole is increased, the outer wall of the water cannon bag body makes closer contact with the inner wall of the blast hole through high pressure in the water cannon bag body, and the beneficial effects of replacing clay stemming to block blast hole is achieved; due to the fact that the length of the water cannon bag body is increased, the water cannon bag body can be completely suitable for the length of the blast hole, the water volume is increased, the water curtain range after blasting is enlarged, and the beneficial effects capable of better absorbing harmful gas and dust in blast smoke after blasting is achieved; and due to the design of the sectional type water cannon bag body, sequential rupture is achieved at the moment of blasting, the impact force generated at the moment of blasting is buffered, and the blast hole can be blocked more tightly.

The invention provides a shaping and gap plugging device. The shaping and gap plugging device comprises a first plug plate, a second plug plate and a plurality of adjustable assemblies perpendicular to the thickness direction of the first plug plate and the second plug plate; a closed pouring area is defined by the first plug plate and the second plug plate; and the adjustable assemblies penetrate through the thickness direction of the first plug plate and the thickness direction of the second plug plate respectively, are arranged in the ground and move towards the sides close to sealing strips in the thickness direction of the first plug plate and the thickness direction of the second plug plate respectively, wherein the sealing strips are bonded to the first plug plate and the second plug plate, so that a gap is completely plugged by the first plug plate and the second plug plate under the common pressure of the adjustable assemblies and a formwork. The invention further provides a construction method adopting the shaping and gap plugging device. The levelness of the first plug plate and the levelness of the second plug plate are adjusted through the adjustable assemblies, wherein the sealing strips are bonded to the first plug plate and the second plug plate in the gap plugging device, the complex plugging situation that after the formwork is erected, gaps between the bottom of the formwork and the ground are different in size can be avoided, the reserved gaps can be completely and tightly plugged, the problems of honeycomb pitted surfaces, holes and root rotting of the root of a main wall can be effectively avoided, and the entity quality of a main structure is improved.

The invention relates to a low-voltage distribution box inlet and outlet wire fireproof blocking device. The low-voltage distribution box inlet and outlet wire fireproof blocking device includes a fixing base, fixing screws, serrated filling foam, a top half arc cover, a lower half arc cover and arc cover connecting screws, wherein the fixing base is annular, the several fixing screws are arrangedon the edge, the center position of the fixing base is fixedly connected with the lower half arc cover, the lower half arc cover and the upper half arc cover are connected by a hinge, the arc cover connecting screws are respectively located at corresponding positions of the upper half arc cover and the lower half arc cover, and the serrated filling foam is disposed inside the upper half arc coverand the lower half arc cover respectively. The device is advantaged in that tight blocking, long-lasting durability, high temperature resistance, rat-proof and insect-proof property, beautiful property, no-easy deformation and easy mounting are achieved, and standard parts blocked at inlet and outlet portions of the low-voltage distribution box can be widely utilized.

Provided are an elevated floor capable of being doubled as a plenum chamber and a construction method thereof. The elevated floor comprises an elevated floor body and the plenum chamber. The elevatedfloor body comprises a frame which stands on the ground and is arranged around a center building and surface plates laid on the whole frame body. The frame comprises a set of adjustable bases, a set of vertical rods, a set of brackets and a set of cross rods. The adjustable bases and the bottom ends of the vertical rods are vertically adjustable and are in threaded connection. Each bracket comprises a supporting plate, a stand rod sleeve and a bracket convex head, each surface plate comprises a set of unit surface plates, and each unit surface plate comprises a plate body, a steel frame and abracket bearing groove. According to the elevated floor, an elevated platform is provided, and the problem of elevating leveling is solved; meanwhile, an air supply area is tightly blocked, and the lower space of the elevated platform is fully utilized for ground static-pressure air supply; the frame body has enough rigidity, and therefore the platform can meet the normal people stream load needs;and the air supply plenum chamber on the lower portion of the elevated floor is even in air supply, the elevated floor and the plenum chamber can be used in commo through the whole system, mounting and demounting are fast, and the elevated floor and the plenum chamber can be cyclically used.