47results about How to "Eliminate leakage hazards" patented technology

The invention relates to a high-precision and constant temperature and humidity cabinet, which is used for storing special articles. The temperature and humidity in the cabinet can be controlled within designated scope automatically and constantly. In the invention, a cooling/heating semiconductor high-temperature stacking is used as a temperature control and dehumidification executive component, an ultrasonic wave humidifier is used as a humidification executive component, and an electric temperature/humidity sensor, a series of fans, keys, a display, a controller and the like are mounted, thereby realizing constant temperature and humidity. When temperature inside the cabinet is higher than preset target temperature, the temperature control semiconductor high-temperature stacking generates forward current to reduce the temperature inside the cabinet; when temperature inside the cabinet is lower than the preset target temperature, the temperature control semiconductor high-temperature stacking generates reverse current to raise the temperature inside the cabinet to the preset target temperature; when humidity inside the cabinet is higher than preset target humidity, the dehumidification semiconductor high-temperature stacking generates forward current to reduce the temperature of a condensation block in the cabinet to be below the dew point, so as to enable moisture in the cabinet to condensate and flow into a water tank to realize dehumidification effect; and when humidity inside the cabinet is lower than preset target humidity, an ultrasonic wave humidifier sprays water mist to raise the humidity in the cabinet to the preset target humidity.

An insulated telegraph pole comprises a main layer (1) and a surface coat (2) coating the main layer (1). The insulated telegraph pole is characterized in that the surface coat (2) is a functional waterproof layer formed by combining organic substance with inorganic substance; the main layer comprises a plurality of insulated fiberglass-reinforced plastic main reinforcements (11), at least one layer of insulated grid glass fiber cloth (12) entwined with the main reinforcements (11) and fiber reinforced cement (13) for wrapping the main reinforcements (11) and the insulated grid glass fiber cloth (12). The top end and the lower end of the main layer (1) are sealed, and coated with functional waterproof layers formed by combining the organic substance and the inorganic substance. The insulated telegraph pole has excellent insulating property, high strength and long performance life.

The invention provides an advanced closed structure of a basement roof post-pouring strip. A profiled steel sheet is used for covering the roof post-pouring strip; a cover plate steel bar covers the upper side of the profiled steel sheet and concrete is casted in situ on the upper side to form a cast-in-situ concrete cover plate layer; a steel tube extends to the position between the two sides of the basement roof; and a coil waterproof layer covers the cast-in-situ concrete cover plate layer and the outer side of the side wall of the steel tube. The invention further provides a construction method for realizing the advanced closure of the basement roof post-pouring strip by using the closed structure. The construction method includes the steps that a basement roof formwork bent is erected; the advanced closed structure of the basement roof post-pouring strip is erected; a formwork bent system of the roof formwork bent post-pouring strip part is erected; concrete is poured on the roof post-pouring strip through the steel tube and vibrating is carried out; and the formwork bent system of the roof formwork bent post-pouring strip part and the profiled steel support are removed, and construction is completed. The roof post-pouring strip is temporarily sealed first, and after a greening landscape body is completed, the roof post-pouring strip is poured by taking the reserved steel tube as a pouring concrete discharge conduit.

The invention provides a mounting method of a precast air duct during the construction stage of a construction engineering structure. According to the method, original procedures are changed, the air duct mounting operation is performed after main structure wall construction, and the air duct mounting operation and the top plate template mounting are performed together, each procedure in the existing construction method is omitted, synchronous air duct mounting and main structure construction progress can be achieved on the premise of not increasing construction materials and working hours, and the waterproof construction progress and quality of a roof are better ensured.

The invention provides a copper pipe section drawing device for solving the problems, such as leakage points, deformation, breakage, rough appearance and thick pipe wall, which easily occur in a traditional copper pipe section drawing device. The device comprises a bracket and a drawing die on the bracket, wherein the drawing die is connected with the bracket through a sliding rail on the bracket; the sliding rail is fixedly connected with the bracket; a cylinder is arranged on the other side of the sliding rail; a barrel of the cylinder is fixedly connected with the bracket; a piston rod of the cylinder is fixedly connected with the drawing die; a high-pressure oil pump for providing power for the cylinder is connected to the cylinder and is fixed on the bracket; the drawing die comprises a fixed chuck and a fixed base which is fixedly connected with the fixed chuck; the drawing die is fixedly connected with the piston rod of the cylinder through the fixed base; a programmable logic controller (PLC) is arranged on the bracket.

The invention belongs to a fixing device and a fixing method, particularly to a fixing device and a fixing method used for fixing a casing pipe in a cast-in-place floor in the engineering construction. A novel casing pipe fixator capable of being easily assembled and disassembled comprises a fixing base, wherein a screw is penetrated into the center position of the fixing base, a positioning end is formed on the end part of the screw, and the fixing base is adaptive to the internal diameter of the casing pipe and is used for fixing the casing pipe. The fixing method comprises the following steps of: determining the fixing position of an upper-layer casing pipe according to the position of a lower-layer casing pipe; penetrating the positioning end of the casing pipe fixator into the fixing position, and fastening the casing pipe fixator; sheathing the casing pipe onto the casing pipe fixator; enabling the base of the casing pipe fixator to be adaptive to the internal diameter of the casing pipe; limiting the casing pipe; and finally, covering a sealing cap, and fastening. The novel casing pipe fixator capable of being easily assembled and disassembled and the fixing method disclosed by the invention have the advantages of precise position, firmness in fixing, convenience in installation, and repeated utilization, and economic and practical effects are achieved.

The invention discloses a flexible prefabricated member and a method for constructing a pipe gallery by using the flexible prefabricated member. The flexible prefabricated member comprises left and right concrete pipe gallery sections, wherein a deformation joint is formed between the left and right concrete pipe gallery sections, and a form of a buried steel edge rubber waterstop is adopted in the deformation joint and the deformation joint is filled with polyethylene foam plates and sealant; and reinforcing bar joints are reserved in the end faces of the left and right concrete pipe gallerysections, and a circle of water-stop steel plates are separately embedded in the end faces of the left and right concrete pipe gallery sections. The method for constructing the pipe gallery by using the flexible prefabricated member comprises the steps that the prefabricated flexible prefabricated member is transported to a construction site; the reinforcing bar joints reserved in the two ends ofthe flexible prefabricated member are in butt-jointing with horizontal reinforcing bars of rigid cast-in-place sections; and other reinforcing bars in a local area of the connecting section are encrypted, a formwork is supported, and uniformly casting is carried out to enable the flexible prefabricated member and the rigid cast-in-place section to form a whole. According to the flexible prefabricated member and the method for constructing the pipe gallery by using the flexible prefabricated member, the forming quality of the deformation joint is improved through fine prefabrication, and the hidden danger of leakage is reduced; rigid splicing is more mature than flexible splicing; the construction is simple, and the construction period is effectively shortened; and material consumption is reduced.

The invention provides a preparation method of a medium-voltage shield gate field effect transistor, which adopts silicon dioxide (SiO2)/silicon nitride (SiN)/silicon dioxide (SiO2) (ONO structure for short) as a trench barrier layer (ONOHardmask for short), prevents a thick oxygen step difference from being generated in a transition region on the surface of a substrate, and eliminates the hidden danger of electric leakage between a gate electrode and a source electrode.

The invention belongs to the field of constructional engineering construction, and particularly relates to a basement roof settlement post-cast strip pre-sealing construction method. The supporting system of the structural top plates on the two sides of the post-cast strip comprises a scaffold formwork supporting system and a supporting column supporting system. After structural top plate concrete pouring reaches the strength, a scaffold formwork supporting system is dismantled, a post-cast strip is fully laid through supporting steel plates, grouting steel pipes are arranged on the middle line of the post-cast strip at intervals, sealing plates are fixed to top pipe openings of the grouting steel pipes in a spot welding mode, and waterproof treatment is conducted on the post-cast strip area; after construction of the main body structure is completed, a formwork supporting system of the post-cast strip part is erected, the sealing plate is removed, and post-cast strip grouting is conducted through the grouting steel pipe; and after the concrete strength of the post-cast strip meets the design requirement, the supporting column supporting systems on the two sides of the post-cast strip are dismantled. According to the pre-sealing construction method for the basement roof settlement post-cast strip, the construction cost can be reduced, the construction period can be shortened, and meanwhile the safety and stability of structures on the two sides of the post-cast strip are met.

The invention relates to a construction method of an invisible natural ventilation and drainage system for a thermal insulation planting roof. The construction method includes the main construction steps of grooving of a parapet wall, construction of a slope making layer A, construction of a waterproof layer A, construction of a thermal insulation layer and an air passage, installation of a ventilation pipe, construction of a waterproof layer B, construction of a rigid protective layer, construction of a planting area and construction of a decoration layer. According to the construction method, a ventilation duct is arranged in a cross grid shape in the thermal insulation layer; then, a conduit is installed circumferentially on the outer side of a rainwater hopper, and the conduit extendsinto the ventilation duct to form an invisible drainage system; the ventilation pipe is further installed in a grooving opening of the parapet wall, and a L-shaped elbow extends into the ventilation duct to form an invisible natural ventilation system; and after the construction of each structural layer of the roof is completed, the parapet wall decoration layer is constructed, and a ventilation pipe cover is installed in a S-shaped elbow. The ventilation and drainage system is reasonable in structure, easy to construct, high in drainage and waterproof performance, and good in exhaust and ventilation effect.

The invention relates to an enclosed multifunctional integrated system for biotherapy. The system comprises a loading module, a medicine adding module, a sampling module, a culture bag joint module, pipeline switches, and pipelines; the loading module is connected to the culture bag joint module through the pipelines, the pipelines near the loading module and the culture bag joint module are both provided with a pipeline switch; two sides of the pipeline between the two pipeline switches mentioned above are respectively connected to the medicine adding module and the sampling module through pipelines; and the pipelines near the medicine adding module and the sampling module are both provided with a pipeline switch. The structure of the system is smart, the safety is high, the system has multiple functions, which can be assembled freely, the work efficiency is high, the safety of organisms in the system can be guaranteed, the operation time is shortened, the labor strength is reduced, the requirements on operators are lowered, and a safer standard solution is provided for biotherapy.

The invention discloses a heat-pump water heater which comprises a shell, and a compressor, a heat exchanger, an evaporator group and fan assemblies which are arranged in the shell, wherein the evaporator group comprises a first evaporator and a second evaporator; the top ends of the first evaporator and the second evaporator are connected, and the lower ends of the first evaporator and the second evaporator are separated, so that inverted V-shaped connection is formed; the compressor and the heat exchanger are arranged in the cavity of the evaporator group; the fan assemblies are arranged outside evaporator partition plates; air inlet gratings are arranged outside the first evaporator and the second evaporator; air outlet gratings are arranged outside the fan assemblies. The heat-pump water heater has the beneficial effects that due to the integrated design without a water tank, pipeline components can be reduced, the potential leakage hazard of a mounting process is avoided, the mounting is convenient, and the space is saved; the inverted-V-shaped evaporators can effectively reduce the thickness and the height of a unit; air is fed from the two sides and is discharged from the back slant direction; therefore air feeding short circuit and air discharging short circuit can be avoided, and the discomfort caused by a fact that the air is discharged towards people can be also avoided; by the adoption of a form with two fans, the heat exchange efficiency of the evaporators is effectively improved, and the noise of the unit is reduced.

The invention provides a sloping roof concealment type exit roof pipeline ventilation device. The sloping roof concealment type exit roof pipeline ventilation device comprises a sleeve, the sleeve runs through a roof plate, a leveling layer and a heat preservation layer, the upper end of the sleeve is flush with the heat preservation layer, an upper-end pipe mouth of the sleeve is cut slantly, thesleeve is wound by butyl tape and is in seal connection with the leveling layer, the upper end of the sleeve is detachably and fixedly provided with a seal cover, the seal cover is fixed to the upperside of an inclined plane of the sleeve through a torsional spring, the size of the seal cover is larger than that of the sleeve, the seal cover is evenly distributed with a plurality of ventilationholes, and the sleeve is internally connected with an exit roof pipe in a sleeving manner. Compared with the prior art, by means of the sloping roof concealment type exit roof pipeline ventilation device, the construction difficulty is greatly reduced, roof tiles are not damaged, the water resistance is more reliable, and structures are more stable.

The invention relates to an exterior wall construction process of a dry wall and particularly relates to a construction process of an overall waterproof exterior wall heat insulation and energy conservation system. The construction process comprises the following steps: cleaning the exterior wall of a base wall; pasting fireproof isolation strips on the surface of the exterior wall; brushing polyurethane moisture-proof primer coat on the surface of the exterior wall; coating a polyurethane heat insulation material on the surface of the moisture-proof primer coat; coating and brushing an interface agent on the surface of the polyurethane heat insulation material; plastering polyphenyl granules on the surface of the interface agent; and slicking and plastering anti-crack mortar on the surfaces of the polyphenyl granules. The construction process is low in requirements on the base wall; the dry exterior wall does not need to be plastered and leveled and is directly constructed; the construction time is reduced; the constructed exterior wall is high in integrality and free of joints; cracking of the heat insulation layer can be effectively avoided; polyurethane foams intrinsically have waterproof effects; meanwhile, the exterior wall is integrally coated, so that the exterior wall has a good waterproof effect; the hidden trouble of leakage of the exterior wall can be effectively eliminated.

The invention relates to the technical field of shale gas fracturing gas production wells, in particular to a fracturing gas production wellhead device. The fracturing gas production wellhead device comprises an oil pipe head assembly, a fracturing device and a gas production device, wherein the fracturing device comprises a main valve I which can be connected to the upper end of the oil pipe headassembly, a main valve II which is connected to the upper end of the main valve I, and a fracturing tree which is connected to the upper end of the main valve II. According to the fracturing gas production wellhead device, a hanging device and a jackscrew are not installed under the fracturing working condition, the hidden danger of leakage at the jackscrew position is completely eliminated, an abrasion-resistant bush is not required to be lowered in the fracturing process, the operation steps are simplified, a hanger is above the main valve under the gas production working condition, a hanging flange and a jackscrew assembly can be replaced after shut in, the operation is convenient and the safety is high.

The invention relates to an insulation fixing structure for a lead-out wire of a halogen tube, which is used for an electric heater product with a halogen tube. The insulation fixing structure for thelead-out wire of the halogen tube sleeves the junction of the lead-out wire and a heating wire through a glass fiber tube, and one end of the glass fiber tube is fixedly connected with a glass pressplate; an insulation fixing clamp sleeves the glass fiber tube at the junction of the lead-out wire and the heating wire, and is fixedly connected with the glass press plate. The glass fiber tube is fixedly connected with the glass press plate, so that the glass fiber tube cannot fall off even if in the case of being stressed during assembly for the halogen tube, and the role of insulation protection is played on the connection position of the lead-out wire and the heating wire, so that the hidden danger of electric leakage due to the exposure of the connection position of the lead-out wire and the heating wire is effectively eliminated. The invention further provides an electric heater with a halogen tube and comprising the insulation fixing structure for the lead-out wire of the halogentube.

The invention discloses an electricity-leakage-preventive piezoelectric ceramic igniter body plastic shell (hereinafter referred to a body). The body is characterized in that the whole body is formed by pressure injection of engineering plastic; a rectangular hole is formed below a wire guide groove of the body; after piezoelectric ceramic is assembled, a square or round metal plate is pressed into the hole to close and fix the piezoelectric ceramic and serve as a cathode of the piezoelectric ceramic.

Disclosed is an accessible roof heat-insulation leveling layer with a water and air discharging system, and relates to the technical field of building top roof heat-insulation leveling layer construction. Drainage airways are arranged horizontally in a net mode on a cast-in-place layer panel, pisolith is laid in the drainage airways, the upper portions of the drainage airways are covered with asphalt felt, and a cement mortar leveling layer is made on the upper portion of the asphalt felt; and an L-shaped air discharging bent pipe communicating with the drainage airways is arranged on the sidesurfaces of the drainage airways, an air outlet of the air discharging bent pipe faces upwards, and the air outlet of the air discharging bent pipe extends into a toilet discharging channel. According to the accessible roof heat-insulation leveling layer with the water and air discharging system, the hidden danger that after an air discharging exposed pipe of the heat-insulation leveling layer isdisturbed and pulled, water-proof layer repairing is not tight, and roof leakage occurs is eliminated, the overall beauty of roof decoration is greatly improved, and a more spacious and comfortable activity place is provided for occupants in a building.