Jet grouting device with rotating roller bearing within casing pipe and rotating pipe

Abstract

A high pressure jet grouting device generally employed with a portable stand comprised of a vertically adjustable shelf forming a platform for attaching an air motor, reduction gearing box and a releasable right angle gear box. High pressure air is pumped to the air motor and a grouting pump, the air pressure is used to turn the right angle gear and a rotatable pipe inside a casing pipe. The grouting material under pressure from the air compressor is pumped through a hose to a swivel connection on the end portion of a rotating pipe to inject the grout into the ground from a spray nozzle located at the opposite end of the rotating pipe inserted in the ground. A rotating roller bearing is provided between casing pipe and the rotating pipe. The device is small and does not require a heavy drill rig as the drilling operation is separately performed from the grouting process.

1 .) A apparatus of a high pressure jet grouting device comprising:
 a portable stand comprising a vertical tubular shaft formed upon a base plate having an adjustable shelf;   a clamping means attached thereto to provide a locking and unlocking of adjustable shelf wherein; the shelf is a movable platform providing a mounting means for an air motor with output shaft, reduction gear box and a releasable right angle gear coupling and   a rotating pipe is part of half the right angled gears and is employed to rotate 90° degrees from the adjustable shelf consisting of a mounting bracket below the right angled gears to include a mount for keeping a casing pipe held in place.   
     
     
         2 .) The apparatus of a high pressure jet grouting device of  claim 1 , wherein the air motor and reduction gears are attached together with a clamping means consisting essentially of mounting plates bolted together. 
     
     
         3 .) The apparatus of a high pressure jet grouting device of  claim 1 , wherein the system comprises:
 an air compressor for supplying high pressure air (4000-6000 psi) through a T splitter which is regulated to send air to the air motor and a grouting pump respectively wherein, the air drives the reduction gears and turns the rotating pipe by the rotation of the right angle gears and air from the compressor is also employed to operate the grouting pump.   
     
     
         4 .) The apparatus of a high pressure jet grouting device of  claim 1 , wherein the rotating pipe is a hollow tubular shaft with half of a conical right angle gear assembly attached perpendicular to the rotating pipe whereby the other half of the right angled gear is releasable and attachable to the reduction gears wherein the rotating pipe is rotatable inside a fixed casing pipe whereby a high pressure swivel connector is attached to the upper end portion of the rotating pipe to allow for rotation of only the rotating pipe and not the grouting hose connected thereto. 
     
     
         5 .) The apparatus of a high pressure jet grouting device of  claim 4 , wherein the rotating pipe comprises:
 a spray nozzle at the opposite end of the high pressure swivel on the rotating pipe to inject grouting materials supplied from the grouting pump through high pressure swivel connection via the rotating pipe, and to the spray nozzle penetrating the surrounding ground.   
     
     
         6 .) The apparatus of a high pressure jet grouting device of  claim 3 , wherein the device consists of one or more manually operated valves disposed after the T splitter valve for controlling the volume of the flowing grouting material and the rotation of the rotating pipe. 
     
     
         7 .) The apparatus of a high pressure jet grouting device of  claim 4 , wherein casing pipe comprises:
 a rotating roller bearing disposed inside the casing pipe and fixed in place near the spray nozzle end by a circular annulus flange “stopper” to allow the insertion of the rotating pipe there through and prevent unwanted rotational deviation of the rotating pipe and grouting material back flow up the casing pipe.