Patent ID: 8955618
Filing Date: 2015-02-17
Classification: C10B

Abstract:
1. A tool for crushing coke comprising: a housing that, in an operating state of the tool, is attached adjacent an end of a rotatably drivable drilling rod; at least one cutting nozzle for cutting coke in a drum by means of a water jet; at least one drilling nozzle for drilling coke in a drum by means of a water jet; an inflow channel in the housing for receiving water flowing under pressure into the housing through the drilling rod; a valve unit for distributing water from the inflow channel into flow channels in communication with the cutting nozzle and the drilling nozzle; a control device that is rotatable relative to the longitudinal axis of the housing to actuate the valve unit to open or close a flow path of the water to the cutting nozzle or to the drilling nozzle depending on a rotational position of the control device; a driving device that is automatically actuated based on changes in the pressure of the water relative to an operating pressure and a switching pressure, wherein the switching pressure is different than the operating pressure, and wherein the driving device causes a switching element to contact the control device, thereby causing the control device to rotate through a switching angle, wherein the switching element is moved by the driving device from an inactive position transversally relative to the longitudinal axis of the housing into an active position in a linear fashion when the water pressure attains the switching pressure and is moved back into the inactive position when the pressure of the water attains the operating pressure, wherein the switching element is coupled to means for converting linear movement into rotary movement of the control device, wherein the switching element is engaged with control parts of the control device to rotate the control device, wherein the control device includes four control parts concentrically offset by 90° relative to each other, wherein the switching element has a head that is brought into engagement with one of the four control parts during the forward movement of the switching element from the inactive position to the active position, wherein the head engages the control part among the four control parts that had moved into a readiness position in front of the head at the end of a prior switch-over when the switching element had moved to the inactive position, and wherein the head moves the engaged control part via linear movement of the switching element to cause the control device to rotate by 90°.