摘要:
A direct-fired steam generator body defines a combustion chamber and having an exhaust outlet. A mixing chamber is provided for receiving the exhaust gases from the combustion chamber. A flange joint between an elbow forming part of the mixing chamber and the end of the steam generator body defining the exhaust outlet is designed so as to be cooled by process water coupled to the joint by an injection port provided in one of the flanges.
摘要:
A direct-fired, propane powered steam generator is provided with a carburetor, which receives vaporized propane from a converter arrangement which converts liquid propane to vapor, receives pressurized air and feeds a mixture of vaporized propane and air into the combustion chamber of the steam generator. The amount of air delivered to the carburetor is variable, with the amount of vaporized propane entering the carburetor being determined by the position of a metering valve which varies in accordance with the amount of air passing through the carburetor. The converter arrangement receives liquid propane and is coupled to process water heated in the water jackets of the combustion chamber and adjacent structure, the converter arrangement being designed so that heat from the water is transferred for effecting vaporization of the liquid propane. The flow of liquid propane for combustion in a pilot burner and for combustion in the main combustion chamber may be controlled using various arrangements of solenoid-operated lock off valves and/or vacuum-operated fuel lock off filters and/or air pressure balance control valves.
摘要:
A mower has a pair of cutter heads which are pivotally supported by respective cantilever beams. The cantilever beams are pivotally coupled with a hitch assembly, which in turn is coupled with a traction unit via two lower lift arms and a floatable top link. The floatable top link allows the hitch assembly to float relative to the traction unit during transport. A hydraulic cylinder interconnected between the cantilever beams pivots the beams between a transport position and a working position. Stops on the hitch assembly limit pivotal movement of the beams relative to the hitch assembly.
摘要:
Components of a crop re-hydration system are advantageously carried on free space of a large square baler. Specifically, a direct-fired steam generator is mounted at a rear location on the baler so as not to transfer heat to a hydraulic fluid supply tank located at a forward location on the baler. Further, the combustion chamber of the steam generator is coupled to a forwardly extending main steam conduit having a length sufficient for ensuring that the water injected into the combustion chamber is thoroughly mixed with hot combustion gases and changed to steam prior to reaching a steam distribution manifold located at a forward end of the baler. A combustion air intake filter is positioned in a relatively clean zone at an elevated location at the rear of the baler. Water tanks are mounted closely adjacent ground wheel axles of the baler so that the weight of the water does not unduly load the baler frame.
摘要:
A mower has a pair of cutter heads which are pivotally supported by respective cantilever beams. The cantilever beams are pivotally coupled with a hitch assembly, which in turn is coupled with a traction unit via two lower lift arms and a floatable top link. The floatable top link allows the hitch assembly to float relative to the traction unit during transport. A hydraulic cylinder interconnected between the cantilever beams pivots the beams between a transport position and a working position. Stops on the hitch assembly limit pivotal movement of the beams relative to the hitch assembly.
摘要:
A baler is equipped with a crop re-hydration system including a steam injection manifold mounted for discharging steam onto a windrow of crop as the windrow is being fed into the baler. The steam injection manifold has a steam discharge orifice arrangement which can be adjusted to vary the discharge width. A flexible duct guides discharged steam to the crop windrow.
摘要:
In a parallelepiped agricultural baler flake transfer events are sensed e.g. by the activation of a pre-compression chamber switch or other means indicating that the pre-compression chamber is full and a signal is sent to the baler control logic. The baler logic records in memory the GPS location of the baler at the time of the flake transfer event. A map is then generated showing the GPS location of each flake transfer event. The average crop quantity per flake is determined e.g. by weighing a finished bale and dividing the bale weight by the number of flakes per bale and programming the information into the baler logic. Finally the crop yield for a given field area is determined in the baler logic by multiplying the average crop quantity per flake by the number of flake events recorded in the given area.
摘要:
A steam injection manifold assembly is mounted to a crop pick-up assembly and is provided with an elongate manifold disposed lengthwise of the pick-up assembly. A plurality of steam injection tubes are releasably mounted to the manifold to receive steam exiting through respective steam outlet openings provided in the manifold. In one embodiment the injection tubes are shaped similarly to tine stripper bands of the pick-up, and in another embodiment the injection tubes define the stripper bands of the pick-up.
摘要:
A system and method for use in retrieving rows of data from at least one table in a database system comprising tables of data stored on one or more storage facilities and managed by one or more processing units. A plurality of samples retrieved from a table in the database are maintained in computer memory, the samples associated with age data representing the order in which the samples were retrieved. The number of samples (S) required to be maintained that are representative of the table is calculated. The number of samples (A) to remove from the samples maintained in computer memory is calculated. The A oldest samples are removed from the samples maintained in computer memory. The number of samples (R) to retrieve from the table is calculated. R new samples are retrieved from the table. The R new samples are stored with the samples maintained in computer memory.