271results about How to "Avoid vacuuming" patented technology

The device comprises: a feed path for a roll to be glued; along said path a station for unwinding and positioning the tail edge of the roll; in said unwinding and positioning station, a first movable member (7) and a second movable member (9) make contact with said roll (R). A glue dispenser comprising a glue reservoir (53) and a dispensing element (55) movable along a dispensing path is also provided.

The present invention discloses one kind of detergent feeder. There are separately set powdered detergent can and liquid detergent can and washing tub connected to the powdered detergent can, so that the optional powdered detergent or liquid detergent may be diluted with the washing water and added into the washing tub via the powdered detergent and liquid detergent shared feeding channel. Especially, the liquid detergent can is provided with ventilating unit to avoid vacuum inside it while the pump runs, and is maintained in sealing state after the pump is stopped.

The invention relates to the technical field of motor tests and discloses a testing system of a hydraulic motor. The testing system of the hydraulic motor comprises a motor, a speed changing box, a tested motor, a loading motor, a first oil way, a second oil way, a feedback oil way and a compensation oil way. The speed changing box is provided with an acceleration gear and a deceleration gear, the input end of the speed changing box is in driving connection with the output end of the motor, the loading motor is butted with the tested motor through a power shaft, the output end of the speed changing box is in driving connection with the power shaft, the first oil way serves as an oil inlet channel of the tested motor, the second oil way serves as an oil return channel of the tested motor, the oil outlet end of the feedback oil way is communicated with the first oil way, and the oil outlet end of the feedback oil way selectively supplies oil for the oil inlet end of the feedback oil way or supplies oil for the oil inlet end of the feedback oil way through the loading motor. By means of the testing system, mechanical and hydraulic compensation power recovery modes or the hydraulic compensation power recovery mode can be selected according to needs, and testing requirements for power tests, service life tests, batch tests and the like on most majority of hydraulic motors can be met.

A system for actuating a clutch that alternately driveably connects and disconnects components, includes a clutch having a piston that includes a first apply area and a second apply area, a fluid pressure source, a source of variable control pressure, and a control coupled with the fluid pressure source and operative in response to the control pressure to engage the clutch initially by increasing pressure steadily at the first apply area up to a first magnitude followed by a rapid increase in pressure at the first apply area and the second apply area above the first magnitude to a second magnitude.

A beverage and cooling dispensing apparatus for holding both containerized and non-containerized beverages including a cooler unit adaptable for holding and cooling containerized products such as bottled and canned beverages and other chilled products, an internal container adaptable for holding non-containerized free-standing beverages which is positionable within the main cooler unit, and a dispensing mechanism accessible from the exterior of the cooler unit for dispensing the non-containerized beverage from the internal container. The internal container includes a first coupling mechanism which is engageable with a second coupling mechanism associated with the dispensing mechanism for providing fluid communication between the dispensing mechanism and the internal container when the first and second coupling mechanisms are engaged.

The invention discloses an operation method of by matching a concrete mixer truck with a concrete pumping equipment, The method comprises a discharging step and a truck moving step. In the discharging step, the concrete mixer truck discharges materials to the concrete pumping equipment, and monitors whether the discharging of the materials of the concrete mixer truck is completed. In the truck moving step, after the materials are discharged by the concrete mixer truck, the concrete mixer truck is moved away. The invention also discloses a matching operation system which realizes the matching operation method. The matching operation system comprises a discharging monitoring system used for monitoring whether the materials are discharged by the concrete mixer truck, so that the concrete mixer truck is moved away in time. The invention also discloses a concrete mixer truck using the matching operation system. As whether the materials are discharged can be monitored by the matching operation method and system provided by the invention, after the materials are discharged, the concrete mixer truck can be moved away in time for changing into a new concrete mixer truck, so that the matching operation efficiency can be effectively improved, and the pumping equipment is effectively prevented from sucking the air.

The invention discloses a water hammer air valve and a water hammer gas discharging method during pipeline use. The water hammer air valve comprises a valve body, a bonnet and a protective cover, wherein the bonnet is provided with an opening, the protective cover is disposed on the opening, the valve body is provided with a valve opening for being communicated with a pipeline, a high-speed gas feeding and discharging device which is used for discharging gases stayed in the pipeline during water filling to the outside and shutting down the valve after pipeline water filling is completed is disposed in the inner cavity of the valve body, the output end of the high-speed gas feeding and discharging device is communicated with the outside through the opening of the bonnet, and the valve opening of the valve body is communicated with a bottom gas discharging throttling device for limiting the gas displacement of the pipeline to the inner cavity of the valve body; a trace gas discharging device for discharging mixed, residual and/or precipitated gases in the pipeline to the outside through the opening of the bonnet after the high-speed gas feeding and discharging device shuts down the valve is further disposed in the high-speed gas feeding and discharging device. By the water hammer air valve, water hammer reduction and pipeline safety protection are achieved, blowing blocking during high-speed gas discharging is avoided, and valve closing water hammer is eliminated.

The invention discloses a hydraulic rotary braking energy-saving control system. The hydraulic rotary braking energy-saving control system comprises an oil tank, an engine, a first variable pump, an electromagnetic directional control valve, a three-position four-way directional control valve, a first one-way valve, an energy accumulator, a second variable pump, a first motor, a first pilot operated directional control valve, a second one-way valve, a rotary motor, a second overflow valve, a fourth one-way valve, a second pilot operated directional control valve, a third pilot operated directional control valve, a third one-way valve, a clutch, a speed increasing gear, a coupler, a generator, a transformer, a storage battery, a motor-operated switch, a third overflow valve, a fifth one-way valve, a fourth pilot operated directional control valve, a controller, a first overflow valve and a motor. On the basis of an energy recycling device, a novel energy storage mode is added for the hydraulic rotary braking energy-saving control system, so that energy of high braking torque generated during rotary braking every time is converted, and is stored in the storage battery in the form of electric energy, and the energy recycling efficiency in the rotary braking process can be high.

A hydraulic type energy recovery system for potential energy of a boom of an excavator comprises a variable motor, two variable pumps, an energy accumulator, a control valve, an ECU, a pressure sensor, a revolution speed transducer, a hydraulic cylinder, an oil tank and an engine. Aiming at solving the problems that a great deal of potential energy of a boom of an existing hydraulic excavator under the working condition of severe change is wasted, a hydraulic type energy recovery system is arranged in parallel on the basis of not changing a hydraulic system and the operation performance of the existing excavator; the hydraulic type energy recovery system can recover the potential energy generated when the boom is released downwards, achieve flow regeneration of the boom in order to reduce oil consumption of the hydraulic excavator, and achieve the purpose of saving energy and reducing consumption.

The invention belongs to the field of agricultural machines, and relates to an electro-hydraulic hanging field end self-adaptive lifting device for a tractor, and a control method. The self-adaptive lifting device includes a turning monitoring module, a control module, and a hydraulic execution module; the turning monitoring module can recognize the speed of a left driving wheel and a right left driving wheel and the turning angle of a turning wheel, and can send a monitored signal to a controller; the control module can determine the turning time of the tractor at a field end according to the received speed of the left driving wheel and the right left driving wheel, and the recieved turning angle signal of the turning wheel, and the controller can send a command to an electro-hydraulic proportional valve and a reversing valve so as to control lifting of a hanging system; the hydraulic execution module can achieve lifting and falling of the hanging system according to the command of the controller, can keep a farm implement at a certain working position; and a hydraulic system can timely supply flow to a hydraulic cylinder through a one-way valve when the farm implement rapidly falls down, and cavitation can be avoided. Compared with the prior art, the electro-hydraulic hanging field end self-adaptive lifting device is high in automatic level, is simple to operate, and can greatly reduce the labor cost.

Apparatus and method for on-board lubrication of a paint pumping piston including a reservoir for lubricant and a lubricant dispensing mechanism for delivering a predetermined repeatable amount of lubricant upon manual actuation of the lubricant dispensing mechanism. In one embodiment, a section of tubing acts as the reservoir, and in another embodiment, the reservoir is formed by a transparent or translucent chamber located adjacent an aperture in a pump housing to enable visual inspection of the level of lubricant in the reservoir. A lubricant delivery piston is actuated by an extension thereof projecting through an aperture in the housing, and a lubricant discharge nozzle is located adjacent the paint pumping piston proximate a bushing supporting the paint pumping piston. A breather valve prevents a vacuum in the reservoir as the lubricant is dispensed.

The invention discloses a method for extracting a multi-layer thin plate layer by layer and a mechanism for extracting a multi-layer thin plate using same. The mechanism is essentially characterized in that the mechanism is provided with a baffle block; the top of the baffle block is contacted with the neighborhood of the plane edge of a first layer thin plate at the exit of a stock bin; and a movable plug-in module is arranged near the exit of the stock bin. The method is essentially characterized in that when a sucker-type mechanical hand absorbs the thin plate, the baffle block is used for enforcing the thin plate to be bent, arced and deformed, and the plug-in module is inserted between the arced thin plate and the next layer thin plate, thereby effectively preventing the two layer thin plates from being taken out simultaneously. The invention has the advantages that only one layer thin plate can be taken out at once and reliability is high.

The invention discloses a displacement-force compound control lifting system for a forging manipulator. A port P of a proportional servo valve (2) is connected with an oil supply port (1) of an oil source; a port A of the proportional servo valve (2) is respectively connected with an inlet of a safety valve (3), an outlet of a check valve (4), an inlet of a stop valve (5), a pressure sensor (12) and lower cavities of two lifting cylinders; an oil return port (7) of the oil source is respectively connected with a port T of the proportional servo valve (2), an outlet of the safety valve (3), an inlet of the check valve (4), an outlet of the stop valve (5) and upper cavities of the two lifting cylinders; mechanisms at top ends of piston rods of the two lifting cylinders are fixedly connected; a displacement sensor (8) is internally arranged on the piston rods; and a signal output end of the displacement sensor (8), a signal output end of the pressure sensor (12) and a signal input end of the proportional servo valve (2) are connected with a displacement-force compound controller through signals. Due to the adoption of the system, the response speed can be increased, and the compliance in the vertical direction can be improved.

An enteral feeding device, includes a system for delivering liquid nutrients to an enteral feeding tube. The device includes: (a) a container, having first, second and third openings; (b) a tip configured to be coupled to the container, the tip having an opening in fluid communication with the first opening of the container, the second opening of the container configured such that nutrient can be delivered to the second opening and the third opening configured to receive nutrient or to allow gas expelled from the patient (e.g., through burping) to flow there through.

The invention discloses a hydraulic system of a horizontal buffer cylinder of a forging and pressing operating machine, which comprises an oil-feed port, a proportional pressure-reducing valve, a proportional directional valve, two safety valves, two check valves, a proportional overflow valve, an electromagnetic directional valve, a buffer cylinder, an oil return port, a displacement sensor and a displacement controller. The invention realizes the passive buffering of the buffer cylinder and the switching of an active feeding function through controlling the electromagnetic directional valve, realizes the control of passive buffering force through regulating the proportional overflow valve, realizes the control of active feeding force and buffering restoring force through regulating the proportional pressure-reducing valve, and realizes active feeding displacement and speed accurate control through the displacement closed-loop control of the proportional directional valve. The invention can finish the passive buffering and the active feeding function required by the horizontal buffering of the forging and pressing operating machine and realize the proportional control of force and displacement; and the hydraulic system has the advantages of simple structure and multiple functions.

An ultrasonic fog generator creates a fog of a liquid such as water. The visual appearance of the fog may be altered such as by being illuminated by one or more lights having one or more colors. Further, the fog may be used to deliver pharmaceuticals to one or both of the lungs of a patient.

An apparatus for preventing vacuum of a scroll compressor, comprising: a fixed scroll having a bypass hole through which a suction chamber of a casing is connected to a discharge chamber of the casing; a valve block having an inner channel through which the bypass hole of the fixed scroll is connected to the discharge chamber of the casing, and fixedly installed at the fixed scroll; and a valve member disposed between the bypass hole of the fixed scroll and the inner channel of the valve block, for opening and closing between the bypass hole and the inner channel. Since the apparatus is assembled at an outer periphery of the fixed scroll, a processing error of the fixed scroll is prevented thereby to reduce a production cost. Also, since foreign materials generated when a refrigerant channel is processed does not remain in a valve hole, the valve member is prevented from being mal-operated, a productivity is enhanced, and a fabrication cost is reduced.

A surface friction reducing and hydro-tension releasing knife blade having a cutting edge, a back edge, a first side, an opposing second side and a tip. A plurality of spacedly arrayed protrusions on the first side and on the opposing second side between the cutting edge and back edge provide a plurality of spacedly arrayed inclined ramps from the planar blade side to a crest that separate the item cut from the blade side to reduce surface friction and to relieve hydro-tension.