Abstract:
A machine and method for making underground excavations in rock, The machine comprises hydraulic percussion hammers which drive drill bits into the rock face to be bored. A hydraulic power unit (HPU) is located on the machine. The HPU powers the hydraulic percussion hammers. The HPU and percussion hammers form a hydraulic power distribution circuit. The percussions hammers may be moved during operation. The method comprises providing a hydraulic pressure to drill bits using a hydraulic pressure means, pulsing the drill bits against the rock face using the hydraulic pressure to form an excavation, and advancing the hydraulic pressure means into the excavation.
Abstract:
A fluid pulse apparatus for down hole drilling having a turbine assembly actuated by a flow of drilling fluid. The apparatus has a narrowed fluid flow section that cooperates with a piston that moves between an open a fluid flow restricting position. The apparatus has a turbine assembly that rotates in response to a flow of drilling fluid. The turbine apparatus has upper and lower cam followers that cooperate with fixed cam surface such that rotation of the turbine assembly and cam action between the cam followers and the fixed cam surface causes the turbine assembly to reciprocate axially. The piston is fixed to either of the upper or the lower turbine surface such that as the turbine assembly reciprocates axially, the piston moves between the open and the flow restricting positions to create a pulsed fluid flow.
Abstract:
A down-the-hole drill hammer is provided that includes a housing, a solid core piston mounted within the housing, a seal located between the solid core piston and the housing, and a backhead configured to exhaust working fluid volumes about a proximal end of the DHD hammer. The backhead includes a check valve assembly having a plug seal that can be moved to a closed seal position by gravity. A DHD hammer having a segmented chuck assembly is also provided. The segmented chuck assembly includes a plurality of chuck segments forming a cylindrical chuck assembly.
Abstract:
A damping device for inserting into a housing of an impulse producing drill machine, for damping Shockwave reflexes from a drill string connected to the drilling machine, is distinguished in that a first damping piston (7) for direct or indirect action against the drill string and for applying a pressure in the direction of the drill string an a second damping piston (9) for applying pressure in the direction against the drill string against a fixed stop (11) arranged in the housing, wherein the first (7) and the second damping piston (9) are arranged to co-operate for joint damping action with a drill bushing or shank adapter in a certain relative position. The invention also concerns a drilling machine.
Abstract:
A fluid flow control means for a reverse circulation down hole hammer is disclosed. The down hole hammer is of the type that includes a piston that reciprocates within a hammer barrel to repeatedly impact a drill bit by high pressure fluid control means. The fluid flow control means includes a flange portion located on an anvil end of the drill bit and a sleeve portion to slidably receive the flange portion, wherein the sleeve portion includes fluid flow means to allow flow of high pressure fluid past the flange portion.
Abstract:
Rock drilling machine provided with a housing (1), a hammer piston (2) movable to-and-for in the housing, a drilling toll (3) and a guide for the drilling tool. The guide (4) consists at the surface against the drilling tool (3) of polyethyleneterephthalate.
Abstract:
A demolition hammer is disclosed. The hammer includes a hollow body of a pre-defined shape. The hammer also includes a supporting means partially housed within the hollow body at a first end. The hammer also includes a nail bit operatively coupled to a first end of the supporting means. The hammer also includes a flywheel holder operatively coupled to a second end of the hollow body. The flywheel holder if configured to hold a flywheel. The flywheel holder comprises a striker and a balancer, wherein the striker and the balancer are coupled to opposite end of the flywheel via a pair of elastic media. The striker is configured to generate an impact pressure on the nail bit upon deviating from an original point. The balancer is configured to balance the deviation maintain the flywheel at equilibrium based on force due to tension and compression of the elastic medium.
Abstract:
Изобретение относится к горной и строительной промышленности и направлено на повышение эффективности работы гидромолота и упрощение конструкции. Указанный технический результат в гидромолоте, содержащем напорную и сливную магистрали, корпус с установленным в нем бойком, соосно которому в верхней части корпуса расположен гидравлический аккумулятор энергии с гидравлической полостью с плунжером, торец плунжера в рабочем состоянии со стороны противоположной гидравлической полости выполнен с возможностью упора в верхний торец бойка.
Abstract:
A valve assembly includes a valve body having a fluid inlet and a fluid outlet. An operator cavity is within the valve body, and the valve body includes a valve operator socket surface. A valve operator is slidably coupled with the valve body and in the operator cavity. The valve operator includes an operator surface configured to selectively isolate the fluid inlet from the fluid outlet, and an end surface. At least one of the valve operator socket surface or the end surface of the valve operator include a discontinuous interface. The discontinuous interface includes a recessed surface, and one or more interface breaking projections extending from the recessed surface, the one or more interface breaking projections space the recessed surface from the valve operator socket surface.
Abstract:
The invention relates to a pneumatic down-the-hole drill hammer (1) comprising a back- head (2) supporting a check valve (12) and having an integral chamber divider (13) and skirt (14) with a control rod (22) fixedly supported centrally inside the skirt (14). The check valve (12) is removably securable inside the back-head (2) with a sleeve providing a seat for the valve (12) and a dampener located behind the valve seat (16). The skirt (14) extends into a wear sleeve (3) to define a supply passage that feeds a distribution chamber (E) between a piston (4) and the wear sleeve (3). A drive chamber (P) for a working area on a back end of the piston (4) formed within the skirt (14). The piston (4) has a piston stem (23) at a front end which cooperates with a piston stern bush (5) to vent a return chamber (G) when the drill hammer (1) is lifted for flushing. A piston stern bush (5) is secured by a chuck (6) against a split locating ring (24), which fits into a radial groove (25) with a tapered wall provided in the wear sleeve (3).