70results about How to "Avoid the phenomenon of backflow" patented technology

The invention relates to a device used to restrain the slurry fluid impulse impact of concrete pump. Wherein, it comprises transmission channel, feeding cylinder and controller; the feeding cylinder is through to the transmission channel; the feeding cylinder has feeding piston and feeding piston rod; the feeding piston rod is connected to the controller; between the feeding cylinder and the material inlet of transmission channel, there is a switch valve for avoiding reflux of slurry. The invention has simple structure, to realize continuous flow of slurry, and reduce the impulse impact.

A modular data center comprises a machine cabinet and a heat extraction alarming system. A heat extraction door is arranged on the machine cabinet. The heat extraction alarming system comprises a temperature sensor, a comparison control unit and a sliding door control device and is used for sensing temperature inside the machine cabinet and outputting sensed temperature. The comparison control unit is used for receiving the sensed temperature and comparing if the sensed temperature is larger than or equal to a first reference temperature. When the sensed temperature is larger than or equal to the first reference temperature, a first control signal is output. The sliding door control device is used for controlling opening of the heat extraction door after receiving the first control signal to remove waste heat in the machine cabinet. The modular data center avoids a phenomenon of hot gas back flow caused by server accumulation of the waste heat.

The invention discloses an anti-reflux disposable drainage apparatus. The anti-reflux disposable drainage apparatus comprises a folding drainage bottle, wherein the middle of the upper surface of thefolding drainage bottle is fixedly provided with a hook, one side of the hook is provided with a negative pressure tube connector, the other side of the hook is provided with a drainage tube connector, the negative pressure tube connector and the drainage tube connector are both connected to an inner cavity of the folding drainage bottle, the upper end of the drainage tube connector is fixedly andhermetically connected with a first drainage tube, an extended end of the first drainage tube is communicated with a liquid storage airbag, the first drainage tube is sleeved with a flow valve, and the other end of the liquid storage airbag is communicated with a second drainage tube. The anti-reflux disposable drainage apparatus has the advantages that through the mutual cooperation of an arranged rubber tube and a glass bead, the phenomenon of liquid reflux is avoided when the anti-reflux disposable drainage apparatus is not in use; through the arranged liquid storage airbag, the time of reflux of a drained substance is remitted once reflux occurs, thereby providing time for a medical worker to respond; through the mutual cooperation of the arranged flow valve and the rubber tube, reflux resistance is ensured doubly, and the practicability is high.

The invention discloses a sputum aspirator dedicated for pediatric nursing, comprising an exhaust port, a fixing seat, a pressure regulating valve, an adjusting knob, a check valve, a first connector,a connecting tube, a sputum suction device, a first needle, a pin, a sealing membrane, a second needle, a clamping groove and a collecting bottle. The sputum aspirator of the invention has the advantages of reasonable structure, low production cost and convenient installation, and the sealing membrane provided here can effectively ensure that the internal waste liquid does not leak to the outsideafter the collecting bottle is taken out and thus the pollution to the environment is also reduced; a motor provided in the invention can drive a sputum suction head sequentially through a coupling sleeve body, a transmission groove, a transmission head and a connecting cylinder body, thereby ensuring the range of sputum suction of sputum suction holes on one side without affecting the suction ofthe sputum suction; and sputum suction grooves are provided in the invention, so that the passage of outside air into the sputum suction grooves through a vent hole and small holes can be facilitated, thereby improving the absorption effect of the sputum, and at the same time, the discomfort caused by partial vacuum in the sputum suction site is also avoided.

The invention discloses a converter gas blending combustion device for hot blast furnaces. The converter gas blending combustion device comprises a converter gas main branch pipe connected with a converter gas main pipe network. A converter gas sub-branch pipe is led out of the converter gas main branch pipe corresponding to each hot blast furnace. Each converter gas sub-branch pipe is communicated with a blast furnace gas sub-branch pipe of the corresponding hot blast furnace through an ejection pipe. Each ejection pipe is inserted into the corresponding blast furnace gas sub-branch pipe. The insertion position of each ejection pipe is located between a blast furnace gas sub-branch pipe flow regulating valve and a blast furnace gas sub-branch pipe shut-off valve on the corresponding blast furnace gas sub-branch pipe. A converter gas sub-branch pipe flow regulating valve is arranged on each converter gas sub-branch pipe. The converter gas blending combustion device has the advantages that the phenomenon of backward flow of blast furnace gas can be effectively avoided; an inlet valve of a blast furnace gas main branch pipe does not need to be frequently and substantially turned down, a flow regulating valve on the converter gas main branch pipe does not need to be adjusted frequently, and the use safety is high.

The invention discloses a novel cleaning machine for food production. The cleaning machine structurally comprises waterproof covers, water inlet pipes, a door panel, a machine body, supporting legs and a high water level alarm device, and the supporting legs are vertically welded to four directions of the bottom surface of the machine body. Compared with the prior art, the cleaning machine has theadvantages that the cleaning machine has a forward and reverse cleaning function through the combined arrangement of a main power transmission mechanism, an auxiliary forward and reverse transmissionmechanism, a forward and reverse transmission mechanism and a cleaning mechanism, two-way regular cleaning can be performed, the cleaning efficiency is high, the cleaning effect is good, residues onthe surface of food can be effectively avoided, water sources after cleaning can be recovered, the waste of the water sources is avoided, the cleaning machine has a high water level warning function through the combined arrangement of a float ball transmission mechanism and a high water level report actuation mechanism, an alarm is automatically sent out when the recovered water is at a high waterlevel to remind an operator of conducting timely processing, and the phenomenon of water backflow is effectively avoided.

The invention relates to the field of medical instruments and discloses a syringe. The syringe comprises: a cylinder body, a fixing hole is formed on the outer peripheral wall of the end of the cylinder body; a push rod capable of reciprocating movement relative to the inner wall of the cylinder body; and a positioning block capable of being inserted and fixed in the fixing hole. Wherein, the push rod includes a rod body and at least two ribs formed at intervals on the outer peripheral wall of the rod body, each rib extends along the axial direction of the rod body, at least one rib is formed with a spacer piece extending toward the adjacent rib, and the spacer An opening is formed between the extension end of the blocking piece and the adjacent rib for allowing the positioning block to pass through. The syringe of the present invention can position the push rod on the cylinder body at any time during the extraction process, which can effectively prevent the push rod from moving toward the head end of the cylinder body, thus avoiding the backflow of the extracted liquid, thereby effectively reducing the Medical accidents caused by operational errors.

The embodiment of the invention provides a shallow cold energy cyclic cooling dehumidification and waste heat utilization system for a mine tunneling roadway. The tunneling roadway is provided with atunneling working face, the shallow cold energy cyclic cooling dehumidification and waste heat utilization system comprises an isolating body of a cylindrical structure, an overground unit, a shallowenergy exchange unit and a downhole unit; the isolating body is arranged in the tunneling roadway; the overground unit, the shallow energy exchange unit and the downhole unit are distributed from topto bottom and can communicate; the cylindrical structure divides the tunneling roadway into an inner roadway and an outer roadway which communicate with the downhole unit respectively; the overgroundunit comprises a heat pump unit, and the evaporation side of the heat pump unit is configured with a first valve and a second valve; and the shallow energy exchange unit comprises a transducer buriedin an underground soil layer, and the transducer is configured with a valve set. According to the shallow cold energy cyclic cooling dehumidification and waste heat utilization system for the mine tunneling roadway, on the one hand, the cooling dehumidification effect of the tunneling roadway is ensured, and on the other hand, full utilization of energy is achieved.

The invention relates to the technical field of energy-saving range hood equipment, and discloses an adsorption type range hood based on fluid pressure intensity. The adsorption type range hood comprises a fixed box body, one end of the fixed box body is fixedly provided with an impeller mechanism, and the other end of the fixed box body is provided with a smoke exhaust pipeline communicated to the outside of the fixed box body; and the middle part of the bottom end of the fixed box body is provided with a smoke suction air duct communicated to an inner cavity of the fixed box body, a filter screen is arranged in the middle of an inner cavity of the smoke suction air duct, and an oil collecting cup is clamped to the position, located at the bottom of the inner cavity of the smoke suction air duct, of the bottom end of the filter screen. According to the adsorption type range hood based on the fluid pressure intensity, the positions and angles between a conductive block I and a conductive block II on a control disc and a conductive ring on a movable disc are set, so that in the process of rotating the angle of a transmission connecting shaft, the range hood is turned on and turned off; and meanwhile, the exhaust power can be adjusted, so that the structural composition of the range hood is greatly simplified, and the range hood is simple to operate and convenient to use.

The invention discloses soil composite biological deodorization equipment which comprises a concrete pond bottom, an odor pipeline and turf, the odor pipeline is arranged above the concrete pond bottom, a gas distribution layer is arranged at the lower end of the odor pipeline, and a glass fiber reinforced plastic grating is arranged above the gas distribution layer and fixed to the edge side of the concrete pond bottom. A volcanic rock filler layer is arranged above the glass fiber reinforced plastic grating, and a deodorization layer is arranged above the volcanic rock filler layer. According to the soil composite biological deodorization equipment, 30% of volcanic rocks are added into soil, components of single soil are improved and are changed into composite components, the soil composite biological deodorization equipment is resistant to hardening, easy in strain biofilm culturing and high in air permeability, 50 cm volcanic rocks are padded under the soil, biofilm culturing can be carried out for strain culturing, meanwhile, the stink retention time can be prolonged, stink can more uniformly pass through the equipment by the bottom built on stilts. Meanwhile, a heating circulating pipeline can be arranged in the soil layer according to needs, and it is guaranteed that strains can have the proper survival temperature in cold winter.

The invention discloses buoyancy water lifting equipment for water conservancy and hydropower. The buoyancy water lifting equipment for water conservancy and hydropower structurally comprises a container tank, an observation meter and a supporting base, wherein the observation meter is connected with the interior of the container tank in a nested mode; the supporting base is connected with the bottom end of the container tank in a welded mode; a control valve, a drainage hole, a water outlet pipe, an air pressure pipe, a water inlet hole, a water inlet pipe and an air groove are arranged in the container tank; the control valve is connected with the interior of the water outlet pipe in a nested mode; the bottom of the water outlet pipe is connected with the two walls of the air groove in aclamped mode; the air pressure pipe is fixed to the right side of the water inlet pipe and is movably matched with the water inlet pipe; the drainage hole is fixed to the right side of the water outlet pipe; the water inlet hole is movably matched with the side wall of the water inlet pipe; and the control valve is movably matched with the right wall of the air pressure pipe. According to the buoyancy water lifting equipment for water conservancy and hydropower provided by the invention, water scale attached to a sliding wall is scraped back and forth by a scraper in the up-and-down floatingperiod of a scraper groove in a up-and-down floating cylinder wall through the change of water buoyancy, and the water scale is scraped off by a scraper head, so that the occurrence of the phenomenonthat the water scale is attached to the sliding wall for a long time to corrode the sliding wall is effectively avoided.

The invention discloses an armature iron core polishing device for an electric tool, and relates to the field of armature iron core polishing devices.The armature iron core polishing device comprises a transmission rod, a fixing assembly is arranged on the transmission rod, and a polishing assembly used for polishing an armature iron core is arranged on the fixing assembly. The armature core only needs to be clamped and fixed on one side distributed in the length direction of the transmission rod, the surface of the armature core can be polished by a fixed thickness through the polishing and grinding plate, and when protrusions exist on the surface of the armature core and are difficult to grind, the polishing and grinding plate can abut against the protrusions on the armature core to compress a first spring for avoiding; therefore, the protrusion position is slowly polished and ground off, and the phenomenon that the protrusion is polished off at a time and a pit which is difficult to repair is formed on the surface of the armature iron core is avoided.

The invention provides an oil field carbon dioxide injection huff-puff oil extraction ground device. The device comprises a carbon dioxide injection system, an oil extraction system and a carbon dioxide recovery system, wherein the carbon dioxide injection system comprises a carbon dioxide storage tank and an injection pressure pump, one end of the injection pressure pump is communicated with the carbon dioxide storage tank, and the other end of the injection pressure pump is communicated with an oil extraction wellhead; the oil extraction system comprises an oil extraction pump, a multi-stage slag removal tank, a liquid-liquid separation tank and a gas-liquid separation tank, the multi-stage slag removal tank, the liquid-liquid separation tank and the gas-liquid separation tank are sequentially connected with the oil extraction pump, the liquid-liquid separation tank is communicated with a liquid carbon dioxide flow channel, and the gas-liquid separation tank is communicated with a gaseous carbon dioxide flow channel; the carbon dioxide recovery system comprises a gas impurity removal tank, an inlet end of the gas impurity removal tank is communicated with the liquid carbon dioxide flow channel and the gaseous carbon dioxide flow channel, an outlet end of the gas impurity removal tank is communicated with a compressor, and an outlet end of the compressor is communicated with the carbon dioxide storage tank. The device is advantaged in that pure carbon dioxide can be recycled, utilization efficiency of the carbon dioxide is improved, and generation of greenhouse gas is reduced.

The invention relates to a funnel stomach irrigator which comprises a funnel, an elastic capsule, a catheter, two groups of plugging components and an expansion component. The catheter is communicatedwith the funnel and the elastic capsule, the plugging components are used for preventing blocking of the catheter and slow flow and return of liquid, and the expansion component is used for expandingthe inner wall of an esophagus, the plugging components are symmetrically arranged outside the catheter, close to the top and the bottom, of the elastic capsule, and the plugging components compriseelastic clamping plates and locking plates. According to the technical scheme, by the aid of a linkage and compact structure, stomach irrigation treatment of a patient can be conveniently, rapidly andefficiently implemented by medical staff in the medical clinical practice operation process, and the stomach irrigator solves the technical problems that the catheter is easily blocked, fluid in thecatheter easily returns and slow flows, and the catheter easily touches the inner wall of an esophagus of the patient.