49results about How to "Reduce ventilation time" patented technology

The invention discloses a periphery hole charging structure for energy-gathered hydraulic pressure smooth blasting, and a construction method thereof, and belongs to the technical field of tunnel construction. The periphery hole charging structure for energy-gathered hydraulic pressure smooth blasting is formed by a shot hole, water bags, an energy-gathered pipe powder charge and a stemming, wherein the water bags, the energy-gathered pipe powder charge and the stemming are arranged in the shot hole; the bottom of the shot hole is a section of water bag; the middle part of the shot hole is twosections of water bags; the energy-gathered pipe powder charge is arranged between the water bag on the bottom of the shot hole and the water bags in the middle of the shot hole; the stemming is blocked in the shot hole; a high-temperature high-pressure gas produced by explosion produces a 'water wedge' effect through a jet flow formed in an energy-gathered groove and the water bags in the smoothblasting shot hole under a blasting action, so that a rock initial crack is promoted to extend, expand and enlarge; meanwhile, due to a composite blocking function of the water bags and the stemming,the formed crack is favorably extended, expanded and enlarged; and the water bags are placed in the smooth blasting shot hole, and a water spray formed in the blasting process further plays a role infalling dust, so that the ventilation time is reduced, the working environment is improved, and the body health of constructing personnel is protected.

The invention specifically relates to a ventilation method of inclined shaft assisted double-hole construction. The ventilation method comprises the following steps: A, analyzing a pollution source and determining a ventilation standard; B, designing a ventilation system; and C, calculating tunnel ventilation parameters, selecting a fan and implementing a scheme; the ventilation system in the step B is specifically as follows: an axial-flow fan is arranged at an outer hole of an inclined shaft at an inclined shaft construction phase and a phase when inclined shaft construction is completed and a tunnel portal does not communicate with the inclined shaft, and a heading-face forced ventilation pattern is adopted with an air duct extending into a working face for ventilation; at a phase when the tunnel portal communicates with the inclined shaft, the tunnel portal is communicated with the inclined shaft and a jet flow gallery ventilation pattern is adopted, and a secure tunnel and a main tunnel both serve as air intake channels, while the inclined shaft serves as an exhaust channel. The ventilation method in the inclined shaft assisted double-track construction solves a long-distance problem that single forced ventilation fails in solving, and is high in ventilation efficiency and good in effect; moreover, the ventilation time is shortened and the construction efficiency is improved, and both electricity and air ducts can be saved; in addition, maintenance is convenient.

The invention provides a full-automatic spraying curing equipment for a tunnel. The equipment is suitable for curing concrete at the top of the tunnel and mainly comprises a distance sensor, sprayingassemblies, a support, a lifting device, a lifting motor, a water pump, a traveling motor, a chain transmission, a vehicle body, a water tank, a magnetic flip liquidometer and an electric control cabinet. The full-automatic spraying curing equipment is easy and convenient to operate and can automatically travel, travel in the opposite direction and spray, and as needed, the equipment can also be switched to be manually controlled. The water spraying amount can be automatically adjusted to enable the water spraying amount to be in the best state, so that cracks in the surface of lining concreteare effectively reduced, the concrete lining strength and durability are guaranteed, economic benefits are indirectly generated, and the equipment is suitable for curing construction of various typesof tunnel lining concrete. By means of the equipment, construction efficiency is improved, the curing procedure cost is lowered, the concrete appearance quality is improved, air in the tunnel is purified, and safety and reliability are improved. The full-automatic spraying curing equipment further has the advantages of being concise and compact in structure, low in manufacturing cost and easy andconvenient to use.

The present invention is the semi-automatic control method of feedback ventilation temperature in producing aerobic compost in the compost temperature controlling technology. The semi-automatic control technology of feedback ventilation temperature combining automatic control and manual control is to control the compost center temperature in 70-75 deg.c and 55-65 deg.c in different stages. The said method can kill pathogenic bacteria, maintain optimized compost degradation and water elimination, maintain the set temperature through manually controlling the blower in the late stage for speeding fermentation and shortening processing period, lower power consumption, and realize harmless compost production.

The invention provides a self-adaptive municipal sewage sludge mixing machine, and relates to a device for cleaning sewers. The self-adaptive municipal sewage sludge mixing machine comprises an uppershell and a lower shell; a vertical first pipeline and a vertical second pipeline are fixedly arranged in the upper shell; the first pipeline extends downwards out of the lower shell and is fixedly connected with a rotary nozzle; a first annular groove recessed upwards is formed in the lower surface of the lower shell; the second pipeline downwards communicates with the first annular groove; fourwall climbing mechanisms are symmetrically arranged in the upper shell in pairs; and a stirring mechanism is arranged on the lower shell. After a sewage well is opened, a worker can directly go down to the well for operation, ventilation is conducted while the machine operates, and the accident risk of the worker is reduced; the stirring mechanism is used for replacing manual stirring, labor forceis saved, the sludge is directly smashed and stirred, and primary suction work in the existing process is omitted; the wall climbing mechanisms have the characteristic of telescopic floating, the machine can adapt to uneven wall surfaces with attachments on the sewage wall and is also suitable for rectangular rainwater well desilting work, and multiple purposes and universalization are achieved.

The invention relates to an inflatable smoke exhaust and dust removal isolating hood for tunnel shaft construction, aiming at solving the problems that the dust removing effect is poor, the energy consumption is great and the health of construction personnel is jeopardized during treatment of dust produced when a drilling and blasting method is adopted for excavation of the tunnel shaft at present. The inflatable smoke exhaust and dust removal isolating hood for tunnel shaft construction comprises an exhaust fan. An exhaust hose which stretches out of a shaft mouth and is fixedly arranged at the shaft mouth is sheathed at the upper part of the exhaust fan. An umbrella-shaped flexible isolating layer which is fixedly arranged at the lower part of the exhaust fan is sheathed at the lower part of the exhaust fan. A plurality of steel frameworks which are radially arranged are fixedly arranged on the umbrella-shaped flexible isolating layer. The lower end of the umbrella-shaped flexible isolating layer is connected with an annular flexible inflatable sleeve. A blower which is communicated with the annular flexible inflatable sleeve is fixedly arranged on the side wall of the exhaust fan. An air compensation pipe is fixedly arranged on the side wall of the exhaust fan, wherein the lower part of the air compensation pipe is arranged in the umbrella-shaped flexible isolating layer and the lower end of the air compensation pipe is closed. A one-way valve is arranged on the side wall of the lower part of the air compensation pipe. The inflatable smoke exhaust and dust removal isolating hood for tunnel shaft construction has the advantages of simple structure, convenience in operation and low cost.

The invention discloses a building interior decoration construction method. The method comprises the following steps: (1) leveling a wall surface; (2) repairing the wall surface; (3) preparing a caustic soda aqueous solution; (4) smearing a caustic soda aqueous solution; (5) coating a binder; (6) scraping putty; (7) erecting a track; (8) spraying wall paint; and (9) air purification. According to the building interior decoration construction method, the content of harmful elements contained in the selected wall paint during construction is low, the drying time of the wall paint can be shortened during construction of the interior of the building, harm to the human body can be reduced, the paint spraying device is used for paint spraying during spraying, labor input can be saved, and the construction efficiency is improved. The ventilation time can be further shortened by using the air purification device at last, and the content of indoor harmful elements can be known at any time by arranging the detection device, so that whether the decorated building can be put into use or not can be clearly and quickly known.

The invention discloses a mining flame-proof type third-level axial flow disrotatory local fan and solves the problems of the existing fan that the ventilation distance is short, the weight is large, and the efficiency of the fan is low. The mining flame-proof type third-class axial flow disrotatory local fan is characterized in that a III level cylinder body, a III level flame-proof motor and a III level impeller are added to a second-level disrotatory fan, and the I level impeller, the II level impeller and the III level impeller are all plastic impellers which are cast generally from modified polyethylene aggregates. The mining flame-proof type third-level axial flow disrotatory local fan provided by the invention can increase the pressure of the fan and the energy of air flow, and thus the long range ventilation is realized, an ultra-long length ventilation requirement of an advancing tunnel is fully and effectively ensured, meanwhile, the stable and efficient operation in a small flow region can be realized, and the application rang is wide; and a disrotatory structure is adopted and the effect of mutual reverse and equal-speed disrotatory is achieved, and the efficiency of the whole fan is improved; the plastic impellers have the characteristics of anti-static electricity, wear resistance and flame retardance, and the mining flame-proof type third-level axial flow disrotatory local fan has the advantages of good security, light weight, good aerodynamic performance, low noises, high efficiency and the like.

The invention discloses an in-situ carbonization curing treatment method for a shallow soft ground, and belongs to the field of civil engineering ground stabilization. The method includes the steps that pretreated ground soil is broken and stirred through a crawler-type stirrer; a first curing agent and a second curing agent are mixed, the mixed curing agents are sprayed into the ground soil, and the mixed curing agents and the ground soil are evenly stirred; U-type drain boards are inserted at intervals through a board inserting device; a compacting device and a film laying device are started, and films are laid while the treated ground soil is rolled; carbon dioxide gas is injected to carry out ventilating carbonization on the compacted ground soil; the steps are repeated, and the steps of mixing the curing agents for the pretreated ground soil, inserting the drain boards, and compacting, sealing and stabilizing the treated ground soil in a carbonization mode are completed continuously. The treatment system and method are simple and reliable and capable of adapting to a complex environment, construction is safe and efficient, and quantification of the curing agents in ground treatment and resource utilization of carbon dioxide are achieved.

The invention specifically relates to a ventilation method of inclined shaft assisted double-hole construction. The ventilation method comprises the following steps: A, analyzing a pollution source and determining a ventilation standard; B, designing a ventilation system; and C, calculating tunnel ventilation parameters, selecting a fan and implementing a scheme; the ventilation system in the step B is specifically as follows: an axial-flow fan is arranged at an outer hole of an inclined shaft at an inclined shaft construction phase and a phase when inclined shaft construction is completed and a tunnel portal does not communicate with the inclined shaft, and a heading-face forced ventilation pattern is adopted with an air duct extending into a working face for ventilation; at a phase when the tunnel portal communicates with the inclined shaft, the tunnel portal is communicated with the inclined shaft and a jet flow gallery ventilation pattern is adopted, and a secure tunnel and a main tunnel both serve as air intake channels, while the inclined shaft serves as an exhaust channel. The ventilation method in the inclined shaft assisted double-track construction solves a long-distance problem that single forced ventilation fails in solving, and is high in ventilation efficiency and good in effect; moreover, the ventilation time is shortened and the construction efficiency is improved, and both electricity and air ducts can be saved; in addition, maintenance is convenient.

The invention discloses a construction method suitable for granite geological grade III surrounding rock water pressure smooth blasting. ②Blow out the residues in each blasthole by high-pressure air ③In accordance with the blasting design requirements, install the explosive coil sandwiched between the water bags in each blasthole. The safety of the electronic detonator detonation system shall be detonated in the order of blasting the slanted undercutting hole first, then the central undercutting hole, and finally blasting the auxiliary eye, the top hole, the bottom hole and the peripheral eye. , to complete the construction. The invention uses hydraulic blasting to improve the footage of surrounding rock, saves the amount of explosives, saves the ventilation time of conventional blasting, controls over and under excavation, improves construction efficiency, and saves about 8.9% of the overall cost compared with the prior art. %.

The invention discloses a pre-splitting blasting shock absorbing method, which comprises the following steps: step 1, drilling blastholes on the face of the tunnel, the outermost circle of blastholes being peripheral holes; A shock-absorbing hole is drilled between adjacent blastholes; Step 3, blowing and cleaning all blastholes; Step 4, loading explosives in all blastholes; and Step 5, blasting after confirmation is correct. The present invention can separate the rock mass plane of the excavated face part from the surrounding rock mass within a certain depth through the shock absorbing holes and the prescribed blasting sequence to form a shock isolation ditch, effectively reducing the impact of blasting on the excavated hole contour. The vibration velocity of the rock mass is improved, thereby improving the shock absorption effect.