406 results about "Communicating cavity" patented technology

The generation of bubbles can be suppressed by enabling a stable supply of working fluid to a dynamic pressure generating groove, and oscillation at the time of rotation and leakage of working fluid can be prevented effectively by efficiently releasing any bubbles generated. There is provided a fluid dynamic pressure bearing 1 provided with an annular dynamic pressure generating face 17 made by forming a dynamic pressure generating groove, which draws a working fluid 14 toward a midway position in the radial direction from the inside and outside of a thrust bearing plate 13 in the radial direction, when a shaft 10 and a housing 11 are rotated relative to each other about the axis, on thickness direction end faces 13a, 13b of the thrust bearing plate 13, or on an inner surface of the housing 11, and an inner groove section 16, which is located on an inner peripheral side thereof and that is depressed more than the dynamic pressure generating face 17 in the thickness direction, on the end faces 13a, 13b. Moreover there is provided a through hole 19 which passes through the thrust bearing plate 13 in the thickness direction so as to open to the dynamic pressure generating face 17, and there is provided a communicating cavity 20 which connects the opening portion of the through hole 19 and the inner groove section 16.

The invention discloses concrete pumping equipment, a serial oil cylinder and a stroke self-adaptive tail end compensation method thereof; the compensation method comprises the steps that: electric proportional throttle valves are respectively arranged on at least one of a first U-shaped pipe and a second U-shaped pipe and at least one of a third U-shaped pipe and a fourth U-shaped pipe; whether the liquid oil volume of a communicating cavity of the serial oil cylinder is in a balanced state is detected, if the volume is not in the balanced state, the opening of the valve ports of the electric proportional throttle valves is controlled, so that oil is supplemented into or relieved from the communicating cavity, and the liquid oil volume of the communicating cavity is in the balanced state. In the invention, because the electric proportional throttle valves are arranged on the U-shaped pipes and the opening of the valve ports of the electric proportional throttle valves is controlled, so that the volume of the liquid oil which enters or is relieved from the communicating cavity is controlled, and the purpose of precisely controlling the stroke of the oil cylinder is achieved.

The invention provides concrete pumping equipment and a travel control device and method for series oil cylinders. The travel control device for the series oil cylinders comprises a first position detecting unit (30), a second position detecting unit (40) and a controller (50), wherein the first position detecting unit (30) is arranged on a first oil cylinder (10) and used for detecting a first motion position (X) of a piston (12) in real time and generating a first motion position signal; the second position detecting unit (40) is arranged on a second oil cylinder (20) and used for detecting a second motion position (Y) of a piston (22) in real time and generating a second motion position signal; and the controller (50) is connected with the first position detecting unit (30) and the second position detecting unit (40) and used for receiving the first motion position signal and the second motion position signal and controlling the volume of a communicating cavity according to a predetermined control strategy to control the travel of the series oil cylinders. According to the travel control device, the problem that the travel of the oil cylinders cannot be timely adjusted in the prior art can be solved.

The invention discloses a glue-sealed type electric connector which consists of a contact element, an outer shell and a pedestal; the contact element and the pedestal are arranged inside the outer shell; the step of the outer edge of the pedestal is provided with an annular groove; the corresponding location of the step of the inner bore of the outer shell is provided with an annular seal groove; after the pedestal is arranged in the outer shell, a communicated cavity formed by the annular groove of the pedestal, the step of the outer shell, the annular groove of the inner bore of the outer shell is injected with seal gum; the seal gum is also injected between the contact element and the pedestal, and is further injected among the internal cavity of the outer shell at the tail end of the connector, the pedestal and the contact element. The glue-sealed type electric connector has the advantages of simple structure and good sealing property, thus avoiding the problems caused by the inconsistent heat expansion coefficients of various seal gum and effectively reducing the dimension of the butt-joint direction of the connector.

The invention discloses a grouting shrinkage compensation method for grouting connection of vertical reinforcing steel bars when prefabricated concrete components are grouted through communicated gravities. The grouting shrinkage compensation method comprises the following steps: setting a grouting feeding head in the appropriate position of a communicated cavity, and filling the communicated cavity with grouting slurry and filling the grouting feeding head as well when grouting is implemented, wherein the upper end of the grouting feeding head is higher than a highest point of a grouting cavity. Because of the gravity function of the slurry in the grouting feeding head, grouting slurry shrinkage caused by reasons such as density, water loss and air exhaust in the curing process of the grouting slurry can be compensated, and the situation that the liquid level of the grouting slurry inside a sleeve is lowered and the sleeve is not fully grouted can be prevented. By adopting the grouting shrinkage compensation method, full grouting can be ensured, and meanwhile a reliable criterion is provided for grouting connection quality inspection.

A novel triple-medium composite heat exchanger comprises an upper seal head, a lower seal head and a frame. The frame comprises an upper partition plate, a lower partition plate and side plates, a plurality of heat exchange plate bundles are arranged in the frame, a plurality of fins are arranged among the heat exchange plate bundles, each heat exchange plate bundle comprises three parallel plates, a gap is reserved between two adjacent plates, two fluid channels are formed in each heat exchange plate bundle, a first channel port and a second channel port are formed in the upper partition plate, a third channel port and a fourth channel port are formed in the lower partition plate, two non-communicated cavities are formed in the upper seal head and the lower seal head, one cavity of the upper seal head is communicated with one cavity of the lower seal head through the first channel port, the fluid channels and the third channel port, the fluid channels are communicated with the first channel port and the third channel port, the other cavity of the upper seal head is communicated with the other cavity of the lower seal head through the second channel port, the fluid channels and the fourth channel port, and the fluid channels are communicated with the second channel port and the fourth channel port. The heat exchanger can synchronously exchange heat of three media.

The invention provides a series oil cylinder reversing control method and device and a concrete pumping system. The reversing control method includes the steps that position signals of a first piston of a first oil cylinder are acquired; position signals of a second piston of a second oil cylinder are acquired; when the first piston reaches a first preset position or a second preset position or when the second piston reaches a third preset position or a fourth preset position, series oil cylinders are triggered to reverse. By the adoption of the reversing control device, under the condition that no external hydraulic system pipeline is arranged, the volume of oil liquid in a communicating cavity is adjusted through U-shaped pipes of an existing oil cylinder, normal reversing can be still conducted when the volume of the oil liquid is not normal, adjustment of the volume of the oil liquid in the communicating cavity continues to a next period for conduction, the phenomenon that the pistons impact on the front ends or the rear ends of the oil cylinders due to the fact that the volume of the oil liquid in the communicating cavity is not normal is avoided, the service life of the oil cylinders is prolonged, and reliability of the system is improved.

The invention relates to an anti-backfire nozzle for a gas burner and a burning device by adopting the nozzle. The nozzle particularly comprises a shell. A fuel passage, a combustion supporting gas passage, a mixing chamber positioned at the downstream of the fuel passage and the combustion supporting gas passage and a spout are arranged in the shell; the mixing chamber has N-stage mutually-communicating cavities. On the radial section of the nozzle, the cross-sectional area of the cavity positioned at the upstream is smaller than that of the adjacent cavity at the downstream. When little circulating gas enters the cavity at the downstream, the mixed gas is burned in the cavity at the downstream and the adjacent cavity at the upstream. With the sharp increase of pressure of combustion products, the combustion products are instantly jet out of the nozzle, thereby preventing the flame from being blown off by the circulating gas flow. Since the nozzle is specially provided with the anti-backfire structure, the burning device with the nozzle is adaptable to reversal convection blowing, provides good working hot gas flow and ensures good stability and high regulation rate of the nozzle flame.

The invention discloses an improved power connecting device for electrical equipment. The improved power connecting device for the electrical equipment comprises a power supply seat fixedly mounted ina wall and a power connecting head connected with the electrical equipment, wherein an insertion slot having a rightward opening and matched with the power connecting head is formed in the right endsurface of the power supply seat; power supply slots with rightward openings are formed in the left end wall of the insertion slot in longitudinal symmetry; a communicating cavity communicated with the two power supply slots is formed between the two power supply slots; first sliding slots communicated with the communicating cavity are formed in the left end wall of the communicating cavity in longitudinal symmetry; second sliding slots communicated with the first sliding slots and the power supply slots are formed between the first sliding slots and the power supply slots; first sliding armsare mounted inside the second sliding slots in a sliding manner; rolling wheels are mounted on the end surfaces, facing the first sliding slots, of the first sliding arms; power supply sheets are fixedly mounted on the end surfaces, facing the power supply slots, of the first sliding arms; sliding cavities extending left and right are formed in the end walls, away from the communicating cavity, ofthe power supply slots; through slots communicated with the power supply slots are formed in the right sides of the end walls, near the power supply slots, of the sliding cavities.

A fluid dynamic pressure bearing has an annular dynamic pressure generating face having a dynamic pressure generating groove, which draws a working fluid toward a midway position in the radial direction from the inside and outside of a thrust bearing plate in the radial direction when a shaft and a housing are rotated relative to each other. The dynamic pressure generating groove is provided on thickness direction end faces of the thrust bearing plate or on an inner surface of the housing, and an inner groove section is located on an inner peripheral side of the dynamic pressure generating face on the end faces and is recessed more than the dynamic pressure generating face in the thickness direction. A through-hole extends through the thrust bearing plate in the thickness direction so as to open to the dynamic pressure generating face, and a communicating cavity connects the opening portion of the through-hole and the inner groove section.

A valve wrench assembly restores functionality to an aerosol container by being selectively and removably attachable the annular container rim adjacent the container outlet, which has been damaged or otherwise compromised, and by opening the valve of the compromised outlet and subsequently directing the aerosol container's product as purposed. The valve wrench assembly comprises an annular fitting assembly and a plunger assembly. The fitting assembly interfaces the plunger assembly to the container, which plunger assembly comprises a sleeve, a nut, and a plunger structure. The sleeve comprises communicating cavities in which the nut and plunger structure are received. The plunger structure is coupled to the nut, each of which provide certain conduit. The gasket structures axially align the plunger assembly with the container outlet and matter-conducting conduit thus extends from the container outlet to the assembly outlet via the valve wrench assembly.

The invention relates to a quick-freezing plant. Specific to the technical problems caused by the use of a conveying plate strip in a liquid nitrogen instant freezer, the invention provides an improved tunnel type liquid nitrogen instant freezer. The improved tunnel type liquid nitrogen instant freezer comprises a tunnel type freezing chamber and surrounding conveying belts in the freezing chamber, wherein support guide rails are arranged on the side walls of the freezing chamber between two layers of conveying belts; the support guide rails extend from the feeding end of the freezing chamber to the discharging end. The tunnel type liquid nitrogen instant freezer is characterized in that diffusion cavities along the freezing chamber are formed in the side walls, which are in contact with the support guide rails, of the freezing chamfer; the support guide rails are provided with a plurality of through holes for communicating cavities between upper and lower conveying belts with the diffusion cavities; a pipeline for communicating the diffusion cavities with the space above the upper layer conveying belt is arranged in the chamber wall of the freezing chamber; an exhaust fan is arranged on the pipeline. The improved tunnel type liquid nitrogen instant freezer is reasonable in structure, is easy and convenient to manufacture, and can be widely applied to the improvement of the conventional liquid nitrogen instant freezer.

A valve and / or repair kit assembly restores functionality to an aerosol container by being selectively and removably attachable the annular container rim adjacent the container outlet, which has been damaged or otherwise compromised. The valve assembly comprises a container-to-assembly interface fitting and a plunger assembly. The fitting interfaces the plunger assembly to the container, which plunger assembly comprises a sleeve, a nut, and a plunger structure. The sleeve comprises communicating cavities in which the nut and plunger structure are received. The plunger structure is coupled to the nut, each of which provide certain conduit. The fitting axially aligns the plunger assembly with the container outlet and matter-conducting conduit thus extends from the container outlet to the assembly outlet via the valve assembly. Certain methodology for discharging container contents is further supported by the valve assembly.

The invention relates to a chute feeder applicable to blowing-carding process, which comprises a chute feeder body, a dust exhaust pipeline (1) arranged above the chute feeder body and communicated with the inner cavity of the chute feeder through a pipeline, a cotton feeding pipeline (4) arranged above the chute feeder body, an upper cotton path (5) arranged inside the chute feeder body, the upper nozzle of which is communicated with the lower nozzle of the cotton feeding pipeline and the lower nozzle of which is communicated with a lower cotton path (7), and a feed roller (2) and an opening and scotching beater (6) which are arranged inside a communicating cavity which is arranged between the upper cotton path (5) and the lower cotton path (7). A pair of air return boxes (8) is arranged at the two sides at the lower end of the lower cotton path (7) and a pair of delivery rollers (9) is arranged at the delivery orifice of the lower cotton path (7); a cotton shedding plate (10) is arranged below the delivery rollers (9). The air return inlets where two air return boxes (8) are communicated with the lower cotton path (7) are respectively provided with shade boards (18); the inner cavities of two air return boxes (8) are respectively communicated with an air inlet of an air circulator (3) through a pipeline.

The invention discloses an integrated reactor based on electrode-supergravity biological rotating discs and a treatment method therefor. A center shaft is arranged inside the reactor, the shaft body structure of the center shaft is a coaxial double-layer sleeve, two parts namely an air passage and a liquid passage are formed, and a through hole is formed in the outer wall of the air passage. The interior of a shell is partitioned into a plurality of communicated cavities by partition boards, each cavity is internally provided with two biological rotating discs which are fixed on the center shaft and are connected to a cathode and an anode of a power supply respectively, and the biological rotating discs serve as pairing electrodes while being taken as biofilm formation carriers. A plurality of hollow fibrous membranes are densely arranged in the middle of each disc body. According to the reactor disclosed by the invention, three technologies of electrodes, supergravity and biological rotating discs are organically combined into one reactor, so that the reactor can utilize the supergravity to carry out high efficiency mass transfer on nitrogen-containing waste gas; the nitrogen-containing waste gas is quickly dissolved in waste water; and then the biological rotating discs serve as the electrodes, so that the denitrification of microorganisms is promoted. The reactor is suitable for synchronously removing the nitrogen-containing waste gas and waste water with high concentration, and the treatment effect is greatly superior to that of an ordinary reactor.

The invention discloses a building concrete preparing device. The building concrete preparing device comprises support columns. The lower end face of each support column is fixedly provided with an annular installation plate. The installation plate is connected with the ground through bolts. A preparing box is fixedly arranged on the upper end face of the support columns. A feeding cavity is arranged in the preparing box. A screening device is arranged in the feeding cavity. The lower side of the feeding cavity communicates with a stirring cavity through a communicating cavity. The lower side of the stirring cavity communicates with the outside. The stirring device is arranged in the stirring cavity. According to the building concrete preparing device, the screening device screens raw materials of the concrete, a sealing and rotating device seals a stirring barrel, the stirring device can be connected with a power supply device at the moment, and therefore the use and cleaning safety of the building concrete preparing device is improved; and besides, the stirring barrel and a stirring plate both rotate and are opposite in relative rotation direction, so that the stirring speed and uniformity are improved.

The invention discloses a liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling method and a liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling system. The liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling system is characterized in that the inner part of a fluidized bed is divided into at least two communicated cavities, liquid slag flows into the fluidized bed from one of the cavities in a single-point or multiple-point manner; a granulation device for crushing and granulating the liquid slag is arranged in the fluidized bed; a gas medium is fed into the fluidized bed, liquid slag particles subjected to granulation flow in a fluidization manner under the effect of the gas medium in the fluidized bed and transfers heat to the gas medium so as to realize the waste heat recovery of the liquid slag, and the gas medium absorbing the heat of the liquid slag particles outflows from a gas outlet in the fluidized bed. The liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling method and the liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling system can further increase the utilization level of industrial waste heat, particularly the recycling level of high-temperature liquid slag energy, and promote energy conservation and emission reduction of national related industries, are in line with national related industry energy conservation and emission reduction policy and have good popularization and application value.

The invention provides a pressure reducing valve structure for adjusting gas pressure. A pressure adjustment process is simple, and the pressure adjustment time is short; and furthermore, when the gas inlet pressure is changed, the gas outlet pressure can be stabilized in a certain range. The pressure reducing valve structure comprises a pressure input port, a pressure output port and an end sealing plug of a valve core body, wherein the end sealing plug is positioned on one side of the pressure output port of the valve core body. The pressure reducing valve structure is characterized in that: an atmosphere communicating port is formed in the middle of the valve core body; a pressure balance shaft is arranged inside the valve core body; the inner wall of the valve core body is matched with the outer rim surface of the pressure balance shaft and the inner wall of the end sealing plug respectively to form a pressure input cavity, an atmosphere communicating cavity and a pressure output cavity; the three cavities are sealed and isolated through sealing pieces; the pressure input port, the atmosphere communicating port and the pressure output port are correspondingly communicated with the pressure input cavity, the atmosphere communicating cavity and the pressure output cavity; a throughout flow channel is arranged in the pressure balance shaft; and one end of the flow channel is provided with a gas inlet hole, and the other end of the flow channel is provided with a gas outlet hole.

The invention discloses a built-in passive full-automatic anti-eccentric-wear oil pipe rotating device. The built-in passive full-automatic anti-eccentric-wear oil pipe rotating device comprises a base, wherein a through cavity is formed in the base, the communicating cavity is fixed to an oil pumping pipe through a hangoff receptacle, and a smooth sucker rod moving up and down is used for providing power required for the rotation of an oil pipe inside the oil pumping pipe. The built-in passive full-automatic anti-eccentric-wear tubing swivel is characterized in that a built-in passive transmission mechanism is arranged between the smooth sucker rod and the hangoff receptacle, and the built-in passive transmission mechanism comprises a damper assembly, a connecting rod assembly and a transmission assembly. According to the built-in passive full-automatic anti-eccentric-wear oil pipe rotating device, the problems existing in the prior art can be solved, the problem of eccentric wear ofthe oil pumping pipe can be solved by adopting a built-in passive structure, and the service life is prolonged.

The invention discloses an energy absorption box of an automobile front anti-collision beam. The energy absorption box comprises a crumple energy absorption device and an air-pressure energy absorption device, wherein the crumple energy absorption device comprises a crumple pipe and a mounting plate which is fixedly connected with the front end face of the crumple pipe; the air-pressure energy absorption device comprises a barrel-shaped cylinder body which is coaxial with the central line of the crumple pipe; the rear end face of the crumple pipe is fixedly connected onto the front end face of the barrel-shaped cylinder body; the barrel-shaped cylinder body is internally provided with a piston; the front end face of the piston is fixedly connected with a piston rod; one end, far away from the piston, of the piston rod penetrates through the front end face of the barrel-shaped cylinder body and stretches into the crumple pipe, and is fixedly connected with the mounting plate; a pressure leaking hole communicated with an inner cavity of the barrel-shaped cylinder body is formed in the front end face of the barrel-shaped cylinder body; a connection hole is formed in the position, corresponding to the pressure leaking hole, of the piston; the connection hole can be used for communicating cavities, located on the two sides of the piston, of the barrel-shaped cylinder body. An energy absorption manner combining crumple energy absorption and air-pressure energy absorption is used for simultaneously converting collision energy, so that the conversion capability of an impact force is improved and the safety of vehicles is also improved.

The invention relates to a prostate expansion catheter, in particular to a prostate expansion catheter with a visual precise positioning function. A main body of the prostate expansion catheter is an expansion catheter body provided with a urethral catheterization opening in the front end, and the urethral catheterization opening is communicated with an expansion catheter internal tube; the periphery of the expansion catheter body is sleeved with a fixing bag and an expansion bag in sequence from front to back, wherein the fixing bag is used for fixing the expansion catheter body into the urethra, and the expansion bag is used for expanding the urethra; the periphery of the expansion catheter body is further provided with a positioning sleeve which movably sleeves the expansion bag and can move axially relative to the expansion catheter body; a fixing bag communicating cavity and an expansion bag communicating cavity are formed in the expansion catheter body, wherein the front end of the fixing bag communicating cavity is communicated with the fixing bag, the front end of the expansion bag communicating cavity is communicated with the expansion bag, and the rear end of the fixing bag communicating cavity and the rear end of the expansion bag communicating cavity are communicated with the outside; the urethral catheterization opening is located in the front portion of the fixing bag. Through the prostate expansion catheter, it can be ensured that the expansion bag is located on the prostatic part of the urethra and the expanding length of the expansion bag keeps being precisely matched with the prostatic part of the urethra of a patient, and the prostate expansion catheter can be used as a urine catheter after an operation without secondary intubation.

The invention discloses a low-temperature environment assembled shear wall construction method, and belongs to the technical field of fabricated building construction. The low-temperature environmentconstruction method comprises the steps of component prefabricating, simulated stress analysis, shear wall installation, laminated plate hoisting for bottom plate prefabricating, window sealing, heating for temperature rise, steel strapping, concrete pouring, communicating cavity treatment, grouting and curing. The low-temperature environment assembled shear wall construction method can solve theproblems that the assembled concrete shear wall cannot be constructed in a low temperature environment and the construction progress is slow.

The invention discloses a microwave and plasma interaction device, and belongs to the field of electromagnetic fields. The device aims to solve the problem that a device enabling microwaves and plasma to meet and to be in interaction does not exist at present. The device comprises a main waveguide tube, a bent waveguide tube and an auxiliary waveguide tube. The main waveguide tube, the bent waveguide tube and the auxiliary waveguide tube are connected in sequence to form a communicated cavity, and a tube line of the main waveguide tube is perpendicular to the main waveguide tube and the auxiliary waveguide tube at the same time. The vertical main waveguide tube and the auxiliary waveguide tube are parallel to each other. A microwave source and a plasma emitter are arranged at the two ends of the cavity respectively, the microwave source is located at the tail end of the auxiliary waveguide tube, the plasma emitter is located at the tail end of the main waveguide tube, and a ferrite insulation attenuator, a directional coupler, a power matcher and a microwave window are sequentially arranged on the auxiliary waveguide tube between the microwave source and the bent waveguide tube. A plurality of microwave absorbing loads are arranged on a tail end tube line of the main waveguide tube, and a tube line of the main waveguide tube is communicated with a pump source. An H11 wave exciter is arranged at the head end of the main waveguide tube.

The invention discloses a vehicle-mounted particle concentration detector which comprises a shell, a laser dust concentration sensor, a sampling pump and a sampling distribution valve, wherein the sampling distribution valve is arranged outside the shell and comprises a valve body and a valve core; a low-concentration sampling port, a high-concentration sampling port and a guide outlet are formed in the valve body; the low-concentration sampling port, the high-concentration sampling port and the guide outlet are communicated with an inner cavity of the valve body; a low-concentration channel and a high-concentration channel are formed in the valve core; the valve core is driven to slide by a valve core power device, so that the low-concentration sampling port and the guide outlet are butted and communicated with each other or the high-concentration sampling port and the guide outlet are butted and communicated with each other; a suction port of the sampling pump is butted and communicated with an air outlet of the laser dust concentration sensor through a communicating cavity; an outlet of the sampling pump is communicated with the exterior of the shell. The detector can detect the concentration of particles in a vehicle in real time and also can detect the concentration of particles outside the vehicle in real time, so that the detection result is comprehensive and accurate.

A valve wrench assembly restores functionality to an aerosol container by being selectively and removably attachable the annular container rim adjacent the container outlet, which has been damaged or otherwise compromised, and by opening the valve of the compromised outlet and subsequently directing the aerosol container's product as purposed. The valve wrench assembly comprises an annular fitting assembly and a plunger assembly. The fitting assembly interfaces the plunger assembly to the container, which plunger assembly comprises a sleeve, a nut, and a plunger structure. The sleeve comprises communicating cavities in which the nut and plunger structure are received. The plunger structure is coupled to the nut, each of which provide certain conduit. The gasket structures axially align the plunger assembly with the container outlet and matter-conducting conduit thus extends from the container outlet to the assembly outlet via the valve wrench assembly.

The invention discloses a fabricated concrete building grouting pretreatment construction method. The fabricated concrete building grouting pretreatment construction method comprises, after fabricatedpart hoisting and fixing as well as fabricated part and bottom plate edge sealing are completed and before grouting construction is implemented, detecting the blocking conditions of fabricated partsby filling vapor in through an ultrasonic atomizer, and then performing wetting treatment on a surface to be grouted, wherein the wetting treatment comprises the following steps of S1, continuously filling in vapor via a grouting inlet in the middle of the bottom of every fabricated part, when the vapor is emitted via a grouting outlet, blocking the grouting outlet through a rubber plug, standingfor a certain while and stopping vapor filling; S2, standing the fabricated parts for a while, detecting the moisture condition at the bottoms of the outlet holes at both ends of every communicating cavity through an endoscope to determine whether refilling vapor is necessary. The fabricated concrete building grouting pretreatment construction method is simple in operation and capable of effectively examining blocking and edge sealing conditions and adjusting the humidity and temperature of the communicating cavities in grouting areas to ensure grouting effects as well as connecting quality ofthe fabricated parts and improving the construction efficiency.

Air blasting type and mechanical type double traditional Chinese medicine drying equipment comprises a tank. Two installing seats are arranged on the side wall of the tank symmetrically and are fixedly provided with adjusting devices. A support plate is fixedly arranged at the top ends of the two adjusting devices. A bearing is embedded in the middle of the support plate. An inner ring of the bearing is fixedly provided with a rotary rod. A hollow inner cavity is formed in the rotary rod. The rotary rod extends into the tank. A plurality of discs are evenly arranged on the side wall of the rotary rod. Communicating cavities are formed in the discs and communicate with the hollow inner cavity. The discs are provided with a plurality of through holes, and the inside of the tank communicateswith the communicating cavities through the through holes. The air blasting type and mechanical type double traditional Chinese medicine drying equipment has the beneficial effects that a rotary shaftdrives a second straight gear to rotate, the second straight gear drives a first straight gear to rotate, the first straight gear drives the rotary rod to rotate, thus hot air can be sprayed out evenly through the through holes, meanwhile, the rotary rod moves up and down, thus hot air can make contact with traditional Chinese medicine fully, and the traditional Chinese medicine is dried evenly and effectively.

The invention discloses a volatile solvent condensing and recycling device. The volatile solvent condensing and recycling device comprises an evaporator, a pipeline, an induced draft fan and a condensing tank, wherein the interior of the evaporator is provided with a cavity for placing a solvent; the condensing tank is internally provided with a plurality of slantly arranged partition plates, thelower ends of the partition plates are fixed with the side wall of one end of the condensing tank, communicating cavities are formed by the higher ends of the partition plates and the side wall of theother end of the condensing tank, and the partition plates are arranged on two opposite side walls inside the condensing tank at intervals; the partition plates are used for dividing the condensing tank into a plurality of cavities, the cavities are communicated through the communicating cavities, and collecting pipes communicating with the cavities are arranged at the positions, corresponding tothe lower ends of the partition plates, outside the condensing tank; each cavity is internally provided with a plurality of condensing pipes at uniform intervals, the quantity of the condensing pipesinside the cavities from top to bottom is gradually increased, an exhaust pipe is arranged at the bottom of the condensing tank, and the exhaust pipe is internally provided with an adsorption filterlayer. Compared with the prior art, according to the device, the recycling efficiency of a volatile solvent is greatly improved, the environmental pollution is reduced in the process, and the purity of each separated component is relatively high.

The invention provides a method and system for exploiting land combustible ice. Two vertical shafts with different depths and not far from each other are drilled to a combustible ice layer through a drilling machine. Two communicated cavities are formed in the bottoms of the vertical shafts through explosion of explosive, high-temperature fresh water is continuously injected into the bottom of the deeper vertical shaft, so that solid methane is converted into methane gas, the methane gas is ejected from the other vertical shaft, pressurization and cooling are conducted so that moisture can be removed, refrigeration is conducted on the methane gas through a nitrogen compressor until the temperature of the methane gas reaches minus 162 DEG C, so that methane liquid is obtained or the methane gas is converted into the combustible ice again for storage, and part of the exploited methane serves as fuel for heating the fresh water. The method and system for exploiting the land combustible ice have the advantages that as long as injection of the high-temperature fresh water stops, resolving of the combustible ice stops, and an insulation measure of a pipeline and a container is achieved, so that waste of heat energy is avoided; electric power is supplied by a diesel generator, so that manufacturing cost is low and operation is reliable; the method belongs to a gap permeation substitution method, and therefore underground collapse is avoided; only carbon dioxide is contained in the emission and all the other waste is backfilled underground for reuse.

The invention discloses a rock three-axis fracturing device. The rock three-axis fracturing device comprises a bracket, a main cavity, a pushing and conveying mechanism, horizontal force application mechanisms, rotary pressing rods and a top force application mechanism, wherein the main cavity is fixedly connected onto the bracket; the main cavity is provided with a communicating cavity for containing a rock to be detected; the pushing and conveying mechanism is arranged at the bottom of the bracket; the pushing and conveying mechanism comprises a first hydraulic cylinder and a supporting plate; the two horizontal force application mechanisms are fixedly connected onto two side faces, which are vertical to each other, of the main cavity respectively; each horizontal force application mechanism comprises a fixed block and a second hydraulic cylinder; the top of a piston rod of each second hydraulic cylinder is fixedly connected with a pressing block and each pressing block is provided with an electromagnetic sensor; the two rotary pressing rods are arranged on side faces, which are opposite to the horizontal force application mechanisms, on the main cavity; each rotary pressing rod comprises a screw rod and a handle; the top force application mechanism comprises a top plate, a third hydraulic cylinder and a pressing plate; the top plate is arranged at the top of the main cavity and the pressing plate is fixedly connected with the top of a piston rod of the third hydraulic cylinder.