A dust collection system comprises: a cover configured to hermetically seal nuclear power plant structure, which is a target to be cut, the cover being provided at an outer circumferential surface thereof with a plurality of cutting groove members adjusted for a height of the cutting wire, the cover being made of a transparent material; an air compressor configured to supply compressed air; an air hose configured to convey the compressed air; a passage member provided in each of the plurality of cutting groove members, the passage member being configured to receive the compressed air such that the compressed air is sprayed to the cutting wire through the cover made of the transparent material; a packing member configured to wrap at least a part of an inner circumferential surface of each of the plurality of cutting groove members.

A cable saw for cutting a workpiece includes a circulating saw cable, a guide device, and a cable storage device and cable tensioning device. The saw cable is driven by a drive and includes a sawing section. The guide device is arranged to move the sawing section along a cutting direction for cutting engagement with the workpiece. The guide device is arranged to allow several movement directions including the cutting direction and at least one lengthening or shortening of the sawing section. The cable storage device and cable tensioning device is arranged for storing, releasing and/or tensioning the saw cable when changing a position and/or length of the sawing section. The guide device includes a lever gear with a pivot lever rotatably hinged to a base holder. The lever gear is arranged to convert a rotational movement of the pivot lever into a movement of deflection rollerswhich form the sawing section therebetweento lengthen and/or shorten the sawing section.

The present invention relates to a wall or floor chain sawing device (1), comprising a chain bar assembly (37) which in turn comprises a chain bar (2) having a longitudinal extension (17) and guiding a chain (3) at least partly around its perimeter. The chain bar assembly (37) further comprises a chain bar housing (6) that is attached to, and partially covers, the chain bar (2) and the chain (3). The chain sawing device (1) comprises a motor (9), a track interface (7) that is arranged to co-operate with a guiding track (8), and a power transmission arrangement (10) that is adapted to transfer a motion from said motor (9) to the chain (3). The sawing device (1) comprises a first pivotable support rod (12) and a second pivotable support rod (13), where each pivotable support rod (12, 13) has a corresponding first end (12a, 13a) and a second end (12b, 13b). Each first end (12a, 13a) is at least indirectly pivotably attached to the motor (9), and each second end (12b, 13b) is at least indirectly pivotably attached to the chain bar assembly (37).

This invention relates to a thin cutting diamond chain saw and a guide bar corresponding to the thickness of the chain, adapting the guide bar with a new Nose Roller (guide bar edge) to dedicated wall cutting machines.

Disclosed herein are a treatment apparatus and method for a waste steam generator, and an installation method of a treatment apparatus for a waste steam generator. The treatment apparatus includes a cutting part for cutting a body of a waste steam generator, a driving part for driving the cutting part, and a support frame for supporting the cutting part and the driving part, wherein the support frame is coupled to an outer peripheral surface of the body of the waste steam generator in a divided state, and the cutting part is driven and cuts the body in a state in which the support frame is coupled to the outer peripheral surface of the body. Consequently, since the treatment apparatus is easily moved and installed, an installation time of the treatment apparatus may be shortened and an exposure time of a worker can be reduced.

The present invention relates to a wall or floor chain sawing device (1), comprising a chain bar assembly (37) which in turn comprises a chain bar (2) having a longitudinal extension (17) and guiding a chain (3) at least partly around its perimeter. The chain bar assembly (37) further comprises a chain bar housing (6) that is attached to, and partially covers, the chain bar (2) and the chain (3). The chain sawing device (1) comprises a motor (9), a track interface (7) that is arranged to co-operate with a guiding track (8), and a power transmission arrangement (10) that is adapted to transfer a motion from said motor (9) to the chain (3). The sawing device (1) comprises a first pivotable support rod (12) and a second pivotable support rod (13), where each pivotable support rod (12, 13) has a corresponding first end (12a, 13a) and a second end (12b, 13b). Each first end (12a, 13a) is at least indirectly pivotably attached to the motor (9), and each second end (12b, 13b) is at least indirectly pivotably attached to the chain bar assembly (37).

The present invention relates to a wall or floor chain sawing device (1), comprising a chain bar assembly (37) which in turn comprises a chain bar (2) having a longitudinal extension (17) and guiding a chain (3) at least partly around its perimeter. The chain bar assembly (37) further comprises a chain bar housing (6) that is attached to, and partially covers, the chain bar (2) and the chain (3). The chain sawing device (1) comprises a motor (9), a track interface (7) that is arranged to co-operate with a guiding track (8), and a power transmission arrangement (10) that is adapted to transfer a motion from said motor (9) to the chain (3). The sawing device (1) comprises a first pivotable support rod (12) and a second pivotable support rod (13), where each pivotable support rod (12, 13) has a corresponding first end (12a, 13a) and a second end (12b, 13b). Each first end (12a, 13a) is at least indirectly pivotably attached to the motor (9), and each second end (12b, 13b) is at least indirectly pivotably attached to the chain bar assembly (37).

A chain bar unit for a wall saw is presented herein. The chain bar unit can include a bar configured to receive a circulating chain or wire around a perimeter of the bar. The chain bar unit also can include a driving gear for driving the chain or wire around the bar, the driving gear configured to be coupled to an output shaft of the wall saw. The chain bar unit further includes the bar being tapered from an end proximate to the driving gear to a distal end having a distal end radius, wherein a width of the bar at the proximate end, is at least two times the distal end radius of the distal end.

A small-sized wire saw device may comprise: a stand portion which comprises a main frame formed in a bar shape elongated in back and forth directions, an exterior frame located at the front portion of the main frame, and a connecting frame connecting the main frame and the exterior frame, while an object to be cut is located in front of the small-sized wire saw device; a slider portion which modes forward or downward on the main frame; a driving power unit including a first motor attached to the upper end of the slider portion; a main wheel which is attached to one side surface of the driving power unit and is rotated by the first motor; and a second motor which is located on the other side surface of the driving power unit and supports the movement of the slider portion.

A wire saw apparatus for an excavator, according to the present invention, comprises: a support plate; an excavator connection part attached to the support plate so as to be able to be detachably attached to an excavator arm; a pair of guide rails attached to the support plate; an ascending/descending member which ascends or descends along the pair of guide rails; an electric motor for raising or lowering the ascending/descending member; a driving pulley rotated by a hydraulic motor attached to the ascending/descending member; a plurality of driven pulleys mounted to the support plate; and a wire mounted to the driving pulley and the plurality of driven pulleys.