摘要:
A set of methods and apparatus for efficiently pressurizing and ventilating an air-supported greenhouse or other structure requiring pressurization and ventilation.A method for efficiently pressurizing and ventilating an air-supported structure comprises directing any external wind flow and external wind pressure into mechanical flow means, such as a fan, or fans in parallel, operating in the intake direction, and into the internal space of the air-supported structure and out of the internal space of the air-supported structure through internal pressure regulating exhaust means, whereby the internal space of the structure will be ventilated and pressurized with the assistance of any external wind and the reliability of mechanical flow means (fans). This method allows for the efficient, effective, and economical cooling, through ventilation, of a protected space created by a light permeable membrane (cover), which is supported only by internal air pressure against the weight of the membrane and dynamic pressures of the external wind, itself.Apparatus for directing any external wind flow and external wind pressure into mechanical flow means are disclosed. Methods and apparatus for internal pressure regulation are also disclosed.Some benefits are less power consumption, minimal internal static pressure (just enough to overcome the external wind), less potential film breakage (than conventional frame-supported poly greenhouses), more light transmission, less cost, and more portability.
摘要:
A polytunnel system comprises a plurality of cover support members (14), a series of leg members (12) and a cover. The cover support members (14) are supported by associated ones of the leg members (12). The cover support members (14) are securable to the leg members (12) at a plurality of different heights.
摘要:
A sheet fixing device comprises an elongated support frame 1 having a narrow opening portion, a pressing frame 3 fitted in the elongated support frame 1 to hold a sheet 2 grippingly in cooperation with the elongated support frame, and an urging member 6 fitted in the pressing frame 3 to urge the pressing frame against an inner wall of the elongated support frame 1. The pressing frame 3 is prevented from being bent or warped.
摘要:
A multi-purpose structure, especially useful as a greenhouse or other plant-protective structure, comprising; (a) a framework comprising a plurality of vertical supports, said vertical supports being arranged in rows that extend the entire width of the structure, wherein each of said rows contains at least two vertical supports having substantially the same height, said framework further comprising a plurality of connecting members that connect the vertical supports in a row to one another at junction points located at the tops of said supports; the framework further comprises a plurality of permanent cross strips extending perpendicularly to said connecting members; (b) at least one flexible sheet adapted to be weaved through said connecting members and extending the entire length of the framework so as to form at least a part of a roof of said framework.
摘要:
A greenhouse on a support structure on posts with a hanging foil roof that can be opened, wherein the foil covering that forms the roof remains completely below the support structure formed by lattice girders in every position by being suspended form the rails on the underside of, and longitudinally to, the lattice girders is movable between the open and the closed position.
摘要:
A greenhouse in which a foil (2) is affixed in a profiled frame (3) of "V"-form by a snap-on frame (1) also of "V"-form and in which at least one of the legs (3a) is provided with an extending edge (4). In a particular embodiment one of the legs of the profiled snap-on frame (1) is provided with another extending edge (5) and possibly a flap (6). The new construction has not only the advantage of simplicity but also the advantage that it is easy to fit and easy to remove.
摘要:
A building structure for plant nursery or like buildings including a pair of side frame assemblies, each defined by an elongated gutter member supported at an elevated attitude by a plurality of upstanding supports. Brackets are disposed between the supports and the gutter member, the brackets including opposite side flanges disposed adjacent opposite sides of the gutter member to stiffen same. Straps span the gutter and connect the sides thereof together to resist splaying and thus deflection of the gutter under wind loading. The building structure includes a roof frame formed of a plurality of arcuate roof frame members which are supported in opposite sockets secured to the side flanges of the brackets.
摘要:
A roll of greenhouse film consisting of slit tubular plastic film wherein the longitudinal edges of the plastic film are folded over about 180.degree. to an imaginary longitudinal line drawn substantially through the center of a surface of the film.
摘要:
A method of folding large sheets of tubular plastic film or slit tubular plastic film wherein the longitudinal edges of the plastic film are folded back over a surface of the film about 180.degree. to an imaginary longitudinal line drawn substantially through the center of a surface of the film and then forming the so-folded sheet into a roll and a roll of greenhouse film folded in the foregoing manner.
摘要:
A frameless shelter is disclosed constructed of a plurality of spherically shaped panel sections having the same radius of curvature and fabricated from a sunlight transmitting plastic adapted to be assembled together to form a dome structure. The panel sections are formed with U-shaped channel edges adapted to nest together with the contiguous edges of adjacent panels so as to provide vertically extending stiffener ribs so that a separate frame is not required, and at the same time act as locating means for the panels so that the dome may be readily assembled. The edges of the lowermost tier of panels rest in a channel support extending about the periphery thereof and resting on footings at ground level or on a wall structure extending above the ground. A center pole reinforcement is also included which also provides an electrical conduit for an electrically operated exhaust fan which may be included. An access door is formed by a spherically shaped door panel mounted within a frame lining a complementarily shaped opening in one of the lower tier panel sections, with the door being disclosed as of two piece or "dutch door" construction to allow ventilation by opening of the top half. Variations disclosed are a half dome construction adapted for installations against existing buildings and an elongated or extended version in which half dome sections are connected with a semi-cylindrical middle section. Also disclosed is a floating pool shelter in which the dome structure is mounted on a flotation ring providing sufficient buoyancy to support the dome so as to allow the dome to be floated on a pool surface.