42results about How to "Low flow rate" patented technology

The present disclosure relates to a self-regulating, landfill well control system for automatically controlling a flow of landfill gas (LFG) through a wellhead associated with a landfill well at a landfill. The system has a combination unit operably associated with the wellhead, with a valve actuator, a flow measurement element and a controller. The valve actuator controls a LFG flow control valve, to thus control an LFG flow through the wellhead. The flow measurement element produces differential pressures proportional to a LFG flow rate. The controller controls the valve actuator and, based on data obtained using the flow measurement element, adjusts a setting of the LFG flow control valve to obtain a specific control point setting, and automatically maintains the control point setting thereafter.

A flowmeter for detecting fluid flow rates in a pipe includes a tube having a channel disposed in the pipe through which fluid in the pipe flows. The flowmeter includes an upstream transducer in contact with the pipe and positioned so plane waves generated by the upstream transducer propagates through the channel. The flowmeter includes a downstream transducer in contact with the pipe and positioned so plane waves generated by the downstream transducer propagate through the channel and are received by the upstream transducer which produces an upstream transducer signal. The downstream transducer receives the plane waves from the upstream transducer and provides a downstream transducer signal. The flowmeter includes a controller in communication with the upstream and downstream transducers which calculate fluid flow rate from the upstream transducer signal and the downstream transducer signal. A method for detecting fluid flow rates in a pipe.

A misfuelling prevention device for a filler neck of a fuel tank includes a tubular element with an inflow side and an outflow side and a closure element, which, when in an open state, permits a flow of fuel through the outflow side, and, when in a closed state, prevents a flow of fuel through the outflow side. In a shell surface of the tubular element there is formed at least one opening which permits a flow of fuel from an inner side of the tubular element through to an outer side of the tubular element. The tubular element can be mounted such that at least a part of the shell surface in which the at least one opening is formed is arranged spaced apart from an inner surface of the filler neck such that fuel flowing through the at least one opening can flow via the filler neck into the fuel tank.

The invention discloses a heat dissipating system for a current transformer. The heat dissipating system comprises a main water inlet pipe connected with a cooling water source, large-diameter water inlet pipes connected between the main water inlet pipe and high-power heat dissipating devices, small-diameter water inlet pipes connected between the main water inlet pipe and low-power heat dissipating devices, and water outlet pipes connected with outlets of the high-power heat dissipating devices and outlets of the low-power heat dissipating devices through branch pipelines. Heat is carried by fluid media to be exhausted to be exhausted of current transformer equipment. The number of the high-power heat dissipating devices and the number of the low-power heat dissipating devices are respectively at least one. All the heat dissipating devices are connected with the main water inlet pipe through the large-diameter water inlet pipes or the small-diameter water inlet pipes. The positions of the low-power heat dissipating devices are higher than the positions of the high-power heat dissipating devices. The heat dissipating system can reduce total flow of the cooling media to the maximum degree while meeting the requirements for heat dissipation of all the heat dissipating devices.

The invention relates to a pneumatic conveying system for fly ash of a dust collector. The system comprises a conveying device, an air source device and a pipeline device; the conveying device is connected with the air source device. According to the pneumatic conveying system of the fly ash of the dust collector, a conveyor mounted below an ash bucket is used for conveying the fly of the dust collector into an ash warehouse; the problems of complex configuration, high conveying energy consumption, serious wear of a pipeline and a valve, and large workload of operation and maintenance of the conveying system of the traditional dust collector can be solved, so that the ash conveying system of the dust collector is economic, practical and reasonable; the operation reliability of the system can also be greatly improved.

A vehicle air-conditioning system of a dual air conditioner type includes a front seat air-conditioning unit for air-conditioning a front seat side and a rear seat air-conditioning unit for air-conditioning a rear seat side. The system includes parallel connected evaporators for the front seat air-conditioning unit and the rear seat air-conditioning unit. At a low flow rate of refrigerant, the system prevents a significant increase in the temperature of air blown into the rear seat area relative to the temperature in the front seat area. The system employs a variable capacity compressor that enables its discharge capacity to be controlled by an external control signal, allowing the discharge capacity of the compressor to be controlled in accordance with the higher evaporator temperature of the temperatures at the front seat evaporator and the rear seat evaporator and a target evaporator temperature.

The invention discloses an intelligent water dispenser control system which comprises a control panel, a temperature sensor, a liquid level switch and an electromagnetic valve. A single chip microcomputer is integrated on the control panel and is a core control chip of the intelligent water dispenser control system. The intelligent water dispenser control system can realize control of various functions, to be specific, control of water outgoing flow, water outgoing temperature, water leakage sensing, maximum water outgoing flow and fault detection, safety and reliability of a water dispenser are improved substantially, and intelligentization and automation of the water dispenser are realized truly.

Disclosed is a total organic carbon (TOC) measurement apparatus capable of facilitating reduction in size of the apparatus and achieving enhanced measurement accuracy. The TOC measurement apparatus includes an organics oxidation unit, a carbon-dioxide separation unit and a conductivity measurement unit, which are integrally formed by laminating a plurality of plates to define therebetween and incorporate therein an oxidizing flow passage, an aqueous-sample flow passage, a gas permeable membrane, a measurement-water flow passage and a conductivity measuring electrode. The TOC measurement apparatus is designed such that carbon oxide in an aqueous sample is transferred from the aqueous-sample flow passage to the measurement-water flow passage through the gas permeable membrane, and a conductivity of measurement water which contains the carbon oxide and flows through a flow passage facing the conductivity measuring electrode is determined and converted to a TOC content.

Apparatus (10) for the micronisation of a powdered material (P) containing particles, comprising: a container (11), containing a reserve of the powdered product (P) to be micronised; a high-energy gaseous spiral fluid-jet micronising mill (12) with which powdered product (P) is micronised; and a feed system (13) to feed powdered product (P) from container (11) to the spiral jet mill (12), wherein feed system (13) comprises a special microdispenser device (20, 21, 26, 27, 28, 29) that micrometrically dispenses and directly feeds the powdered material (P), in a dense state, to the spiral jet mill (12), and wherein said microdispenser device (20) comprises one or more dispensing sections (21) which are cyclically filled with material originating from container (11) and then emptied to feed the material to the spiral jet mill (12), opening and closing at high frequency a plurality of control valves (26, 27, 28 and 29) associated with the dispensing sections (21) of the microdispenser device (20).

The invention provides hydroturbine guide vanes and a hydroturbine which are capable of achieving high efficiency in a Francis turbine having a low flow rate at the highest efficiency point according to the specifications thereof and, in addition, hardly present a strength problem when regulating the flow rate. The guide vanes includes a plurality of fixed guide vanes having a long chord length and a plurality of movable guide vanes having a short chord length arranged between the fixed guide vanes, and a flow rate regulation including a fully-closed state is performed by rotating the movable guide vanes having the short chord length.

The invention discloses a simultaneous co-injection forming device, belonging to the field of plastic product forming technology. The device is characterized in that a middle sliding block and a cylinder of the device are connected with each other; the middle sliding block can reciprocate with the cylinder; a runner on the middle sliding block can be communicated with an internal layer resin runner on a positioning plate and a central column; the runner on the middle sliding block can be communicated with an external layer resin runner on the positioning plate and a clapboard; the resin which enters the external resin runner passes through a spiral concave trough which is changed from depth to shallowness to flow forwards by uniformly wrapping the central column, and finally flow out from a nozzle outlet by wrapping the internal layer resin, thus realizing the co-injection forming of two resins at the same time. The simultaneous co-injection forming device has the effects and the benefits of improving the shifting control currency of the device, improving the uniformity and the bonding strength of the external layer material and the internal layer material of the product, and solving the technical problem of the product which is produced by one-time forming at a single working position when the injection forming machine injects different external layer material and internal layer material. The core material can be high-strength recyclable material, thus meeting the requirement of energy-saving and exhaust-reduction.

Additives that could interfere with the sealing of a cover onto a contact lens package are delivered separately from the bulk saline delivered into the lens package, thereby allowing more precise control of the additive delivery, reducing the incidence of additive in the seal area of the lens package, and improving the seal integrity.

The invention relates to a combined truncated cone type gas-liquid redistributor. The combined truncated cone type gas-liquid redistributor comprises a conical wall and a connecting bottom plate. Theconnecting bottom plate is fixedly arranged at the bottom of the conical wall, and is provided with a plurality of strip-shaped folding plates; the strip-shaped folding plates are of inverted-V structures; a plurality of air holes are formed at equal intervals in both sides of each strip-shaped folding plate; a stop plate is fixedly arranged on the lateral side of the strip-shaped folding plate above each air hole, and an angle is formed between each stop plate and the lateral side of the corresponding strip-shaped folding plate; the angles between the stop plates and the lateral sides of thestrip-shaped folding plates are proportional to the distances from the stop plates to the center of the connecting bottom plate. The combined truncated cone type gas-liquid redistributor has the advantages that the strip-shaped folding plates and the stop plates are adopted to achieve a good distribution effect of washing liquid, and accordingly, the area and time of contact between gases and liquid can be increased and prolonged; the included angles between the stop plates and the lateral sides of the strip-shaped folding plates are proportional to the distances from the stop plates to the center of the connecting bottom plate, so that the differences among the flowing speeds of gases from each air hole are small, the gas distribution effect is good, poor gas-liquid distribution in a packing tower is reduced, and the gas-liquid mass transfer efficiency is improved.

The invention discloses a double-row pile supporting structure. The double-row pile supporting structure comprises front row piles and rear row piles, wherein front row crown beams are arranged at thetops of the front row piles, and rear row crown beams are arranged at the tops of the rear row piles; rigid-frame beams are arranged between the front row piles and the rear row piles; the front rowpiles, the rear row piles and the rigid-frame beams together form a plane truss structure; connecting web members vertically arranged at intervals are arranged between adjacent front row pile bodies and back row pile bodies; front row web members vertically arranged at intervals are arranged between adjacent pile bodies of the front row piles; and a spatial triangle truss column structure is formed between every two adjacent front row pile bodies and the corresponding rear row piles. According to the double-row pile supporting structure, the spatial triangle truss column structure supporting system with the pile bodies connected with the web members solves the existing problems of limited action effects of a dual-row pile spatial system and poor bending resistance of single-row piles, effective connection between the front row piles and the rear row piles is achieved, the space integrated structure is formed, lateral rigidity of the double-row piles is enhanced, and the bending resistance of the structure supporting system is improved.

The invention provides a tower-type porous air supply temperature control device for a data machine room, and the device comprises a temperature control chamber which is internally provided with a porous air supply channel located at a central position, and a tower-type rack disposed around the porous air supply channel; a hot air channel which is arranged above the temperature control chamber; aserver which distributed on the tower-type rack in a tower type, wherein a porous air supply channel upper top cover is arranged on the upper top surface of the porous air supply channel, a porous airsupply channel air inlet is formed in the lower bottom surface of the porous air supply channel, and porous air supply channel air outlets are uniformly formed in the surface of the porous air supplychannel. The problem of low space utilization rate is solved by the optimization of the space arrangement of equipment such as the server and a memory, and the air supply volume of the data machine room is reduced while the structure is compact, so the energy consumption of the fan is reduced, and the uniformity of air flow and temperature distribution in the machine room is improved by adoptingthe perforated plate for air supply.

The invention discloses a cooling pipe. The cooling pipe comprises a first spray nozzle, a second spray nozzle, an outer pipe and an inner guide pipe; the two ends of the first spray nozzle are through, the two ends of the second spray nozzle are through, the first spray nozzle and the second spray nozzle are coaxially arrayed to form an opposite portion with an annular water spraying port, the inner diameter of the second spray nozzle is larger than that of the first spray nozzle, and the annular water spraying port extends in the flowing direction of liquid to form a first containing cavity;the outer pipe is coaxially connected to the second spray nozzle, the inner guide sleeve is coaxially sleeved with the outer pipe, and a second containing cavity is formed in a hollow portion betweenthe inner surface of the outer pipe and the outer surface of the inner guide pipe; a first through hole for liquid to flow in is formed between the first containing cavity and the second containing cavity, and a second through hole for liquid to flow in is formed between the second containing cavity and the inner guide pipe. According to the cooling pipe, the flow speed of cooling water in the pipe can be decreased, the cooling speed of the surface of a rolled part is decreased, a certain water pressure is also kept in the pipe, and the rolled part is prevented from being unevenly cooled.

The present invention discloses a double-side vertical slot type fishway with high energy dissipation and suitable for bidirectional water flow, and is characterized in that the double-side vertical slot type fishway comprises a fishway body, a plurality of pier columns and a plurality of vertical slot type separator plates; the pier columns are disposed over sidewalls of the fishway body; the upstream and downstream water level difference is divided into a plurality of stages by the vertical slot type separator plates; a pool chamber is formed between the adjacent vertical slot type separator plates; the vertical slot type separator plates are disposed at the central position of the cross section of the fishway body; bottoms of the vertical slot type separator plates are fixed on a base plate of the fishway body; fish passing vertical slots are formed by the pier columns and the vertical slot type separator plates; and the pool chambers are connected via the vertical slots. According to the double-side vertical slot type fishway with high energy dissipation and suitable for bidirectional water flow, excess energy of the upstream and downstream water head is eliminated through water cushions, streamwise fiction and water flow opposite thrust and diffusion between the vertical slot type separator plates, so that the double-side vertical slot type fishway can be suitable for hydraulic engineering having bidirectional water heads at a river side or a sea side, energy dissipation effects are good under forward water flow and reverse water flow conditions, integrity of original population is maintained, and the influence of hydraulic engineering construction on current river channels and biologic chains is maximumly reduced.

The invention belongs to the technical field of total temperature test, and discloses a total temperature probe with closely neighboring double-hole. The total temperature probe with closely neighboring double-hole includes a stagnation cover, convection heat exchange holes, a temperature sensor, a probe pole, a heat insulation sealing member, a heat insulation seal cover and a temperature measurement lead wire, wherein two convection heat exchange holes are formed in the stagnation cover in the axial direction; compared with a traditional total temperature probe, the convection heat exchange holes have greater aperture; the temperature sensor can be various types of thermocouple or thermal resistor, and the axial direction of the temperature measurement terminal is corresponding to the first convection heat exchange hole in the axial direction of the stagnation cover; the probe pole is L-shaped or a straight pole type; the heat insulation seal cover can be opened, thus being convenient for exchanging the temperature sensor; the temperature measurement lead wire can be led out from the tail of the probe pole; and the probe structure is suitable for measuring the total temperature of the outlet flow field of a centrifugal compressor, and can measure the total temperature of a flow field at the outlet of a rotor of the centrifugal compressor, wherein the gap among the blade rows is small and the inflow speed is relatively lower. The total temperature probe with closely neighboring double-hole has the advantages of being simple in structure, being small in the size of the head of the temperature measurement part, and realizing adequate heat exchange at the surface of the temperature sensor in the low speed condition.