405 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 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 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 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 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 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.

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.