Abstract: The present disclosure provides a rain shield assembly, a pipe assembly and a turbine fracturing unit. The rain shield assembly comprises at least two sets of cover plate assemblies, wherein each set of cover plate assembly comprises a cover plate, a transmission mechanism and a locking device. When the cover plate(s) is(are) at a closed position, the opening is covered; when the cover plate of each set of cover plate assembly is at an open position, an additional pipe structure which is open at both ends and extends along an extension direction of the pipe is formed by which. According to the present disclosure, the cover plate(s) of the rain shield assembly, when opened, will jointly form an additional pipe structure connected to the open end of the pipe to guide the exhaust gas of the pipe to a further space. Such an arrangement may reduce noise on the one hand, and prevent backflow of the exhaust gas on the other hand.

Abstract: The present invention discloses a continuous high-power turbine fracturing equipment, including a turbine engine, a reduction gearbox, a and a plunger pump, the turbine engine is arranged coaxially with the reduction gearbox, the reduction gearbox is connected to the plunger pump through the transmission shaft, the angle between a central line of the reduction gearbox and the transmission shaft is between 2° and 4°.

Abstract: A vent hood and flashing assembly for use on a metal roof. A vent hood overlies and is joined to flashing. A cover and a screen overlie an upper end portion of the flashing to exclude rain, snow and pests. The flashing includes a resilient, flexible, water-repellant, flexible flange that extends outward from, and is attached to, a lower end portion of the flashing and a flexible, ring seal that overlies an upper surface of the flange. The assembly can be placed over a projection through an opening in a metal roof such that the cover and screen overlie an upper end of the projection and with the flashing surrounding the projection, and the flange can be bent to sealingly conform to the roof surface and secured thereto by fasteners.

Abstract: A device is described which may be fashioned to be installed over an existing unprotected intermittently acting vent pipe of a building, from which malodorous internal air from bathrooms, kitchens, areas where cigar or cigarette smoking ensues and the like, are expelled. It is made from a length of pipe of slightly larger circumference than the existing vent pipe and is stably attached at its lower end to the upper end of the vent pipe. A hinged cap of the same geometric shape as the pipe but of slightly larger dimension is attached at its upper end.

Abstract: A boiler includes an outlet and with multi-positioning piping. The outlet is located on an angle on the boiler formed by angling the edge formed by the top side and back side of the boiler. One end of the piping is cut on an angle such that the piping may be connected to the boiler via the outlet to extend either vertically or horizontally from the boiler.

Abstract: A chimney damper and cap system containing a support base securable to the top of a chimney flue, an increased air flow bracket containing a support tube opening, an inner support tube secured to the bottom of the chimney cap, an outer support tube into which the inner support tube is slidably engaged, an inner and outer spring substantially contained within the inner and outer support tube, wherein the inner spring is secured to the chimney cap, and a damper cable secured to the inner spring, wherein the outer spring biases the chimney cap to an open position.

Abstract: A combination chimney top spark arrester and damper is provided wherein the damper is positioned within the spark arrester. The damper moves between a closed position in which it covers the top of the chimney flue and an open position in which it is raised above the top of the chimney to allow full, unobstructed flow of flue gases. An actuator includes a counterweight urging the damper into its open position. The actuator allows the user to close the damper and to apply a tensioning force to the closed damper to resist vibration and chattering. The device is quickly installed and fits several different chimney sizes.

Abstract: A combination damper and chimney cap apparatus is provided to ventilate a fireplace and a flue connected thereto to provide a draft through the flue. The apparatus includes a platform constructed and arranged to be removably mounted to the flue and formed with an aperture extending therethrough in communication with the flue. An element senses temperature-smoke at the flue and at an area external to a fireplace connected to the flue to provide a signal in response to the temperature-smoke. A ventilation fan is connected to the a support to provide a draft sufficient to exhaust the smoke from the fireplace and the flue and to cool a electronic motor for the apparatus.

Abstract: A chimney flue damper comprised of a generally rectangular frame, a damper flap pivotally mounted to the frame, a bar and extension pin element secured to the bottom of the damper flap and a cable. The bar and extension pin element is rotatably secured to the bottom of the damper flap. When the extension pin of the bar and extension pin element is extended, it passes through an extension pin opening in the damper flap to strike the bottom of the flange of the frame and thus open a damper flap which is stuck closed, either by ice forming on the seal between the damper flap and the frame or as a result of an accumulation of foreign material around the edge of the damper flap.

Abstract: A chimney flue damper comprised of a generally rectangular frame, a damper flap pivotally mounted to the frame, a hammer element secured to the bottom of the damper flap and a cable. A bar of the hammer element is rotatably secured to the bottom of the damper flap. A hammer element head of the hammer element can be pulled away from the surface of the damper flap by pulling the cable downward in the flue. By releasing the cable, the hammer element head will strike the bottom of the damper flap and thus open a damper flap which is stuck closed, either by ice forming on the seal between the damper flap and the frame or as a result of an accumulation of foreign material around the edge of the damper flap.

Abstract: The present invention provides a new and useful arrangement for use in a pivotable chimney dampers of the type including a damper flap to selectively open and close the outlet from the flue of a chimney where the damper flap is pivoted and includes bias means to urge the damper flap to a normally open position with respect to a frame which surrounds the flue when the damper is unrestrained and where a flexible connection is provided to be attached at a first location to the damper flap to pull the damper flap to a closed position against the frame member when the pull means is drawn tight. An expansible spring means can be attached between the damper flap and the pull means to be pulled to extended position when the damper flap is closed.