FI93248B - Hydraulic pipe opener and window cutter - Google Patents

Description

93248

Hydraulic pipe opener and root cutter

The invention relates to an apparatus and system for opening clogged pipes or the like.

5 The device can be used to open sewer pipes, for example, blocked by tree roots. It is also possible to monitor the piping and control the opening work by equipping the device with, for example, a television camera. The hydraulic pipe opener and the root cutter comprise the electric and hydraulic machines required in the system, the control valves, the hydraulic hoses and the actual hydraulic pipe opener and the root cutter comprising the hydraulic motor, the chain mechanisms, the frame, the shaft and the cutting blades.

Blockages in sewer pipes have caused quite a few problems for communities. Especially in areas where there is no need to immerse the pipes very deep, the problem caused by the roots of the trees is difficult. No good solutions have been found in the past to eliminate this problem. Instead, there are numerous solutions for clearing normal jams.

20 The previously known methods of opening blockages are, of course, water, which, when used sufficiently, usually opens the blockage. More advanced versions use pressurized water jets. Very good results are naturally achieved with a high-pressure water jet. However, the use of such methods is cumbersome and cumbersome in long pipelines.

The use of mechanical means to open blockages is also known. Various wire rope systems have been used. Their weakness has generally been 30 difficult maneuverability, and deviations in the pipe joints have caused problems.

The devices mainly corresponding to the invention are mainly based on root-cutting devices operating with high-pressure water, the blade end of which is rotated by pressurized water on the principle of either ___.- u— —— - 93248 2 action or reaction butter. Such a method does not achieve sufficient powers to guarantee the power required for the cutting operation. The power is developed in turbine-driven devices by causing the blade head 5 to rotate at a high speed, and thus energy is stored in the rotating blade head, from which the kinetic energy is converted into the work required for the cutting operation by the action of mass welding force.

Since these devices have a low torque, the speed in the water-filled tube does not increase, but the blade head rotates slowly, and thus no power is generated either. In addition, the propulsive force of water-driven devices is small, so their mobility is quite weak. Such devices also act as complete blindness, as water splashing around them prevents the camera from being used. Due to the above, the operation of the mower can in no way be controlled by the controls. In addition, the power requirements of water turbine-powered cutters are several times higher than, for example, hydraulic root cutters.

The hydraulic pipe opening and root cutter according to the invention are intended to eliminate the above-mentioned drawbacks and disadvantages. The invention is characterized by what is stated in the following claims.

The advantage of the device according to the invention is e.g. self-centering due to construction. Likewise, the advantages of the device include self-tightening, which prevents the device from rotating by the cutting force. increases. The self-transport of the device is also a significant advantage.

Thanks to the hydraulic drive, the blade of the device according to the invention has a high torque and the speed is adjustable. The easy use of a hydraulic pipe opener and cutter for pipes of different diameters is also an advantage.

35 When depressurized, the device collapses and is easily movable in a 3 93248 movable tube. The device according to the invention does not have such parts or projections as would prevent pulling out. The blades are self-adjusting, so that changes in diameter in the displacements of the pipe joints do not cause problems.

5 The blades can also be rotated with the appliance in place. The blades are self-sharpening. TV spindle can be used to monitor the operation of the device.

The device according to the invention is fully controllable by means of a flow and return valve by adjusting the pressure difference, the pressure level and the direction. The device according to the invention is able to operate underwater as well as in partially gravel-filled pipes.

The device according to the invention will now be explained with reference to the accompanying drawings.

Figure 1 schematically shows the connection and peripherals of a hydraulic put-15 trimmer.

Figure 2 shows a side view of a hydraulic pipe opener and a root cutter according to the invention.

Figure 3 is a side sectional view of the invention.

Figure 4 shows a cross-section I-I of a device according to the invention.

Figure 5 shows a cross-section II-II of a device according to the invention.

Figure 1 shows a circuit diagram of a device 25 according to the invention. Vehicle 1 has the necessary hydraulic power unit and power supply. The control valves are located in the control center 2. The hydraulic hoses and pipes are marked with the number 3. The coil facilitating the handling of the hoses is marked with the number 4. The hydraulic hoses 3 are connected to the device 6 according to the invention with quick connectors 5. The electrical lines and switches are marked with the numbers 7 and 8.

In Figures 2 and 3, the number 9 refers to the inlet and outlet valve. The power-driven hydraulic motor is 10. The freewheel is 11 and the drive shaft 12 is surrounded by 35 body tubes 13. The clutch housing is denoted by the number 14. A gear 15 is mounted on the shaft 12 93248, which drives the traction gear 17 of the three bevel gears 16. The housing around it is marked. at number 18. The shafts of the bevel gears are numbers 19 and 20 and the screw and screw wheel numbers 21 5 and 22. The bevel gear housing 23 is fixed to the housing 18 by screws. At the end of the shaft 20 there is a sprocket 25 driving the chain 24. The chain is guided by guides 26 and 27. The folding head 28 is provided with a tension spring 29. The spreading members 30 and 31 of the chain 24 are mounted by pins 32 on guides 26 and 27 and 10 on cylinder 33. Between the 33 there are seals 34. The body tube 13 has a relief 35 at the cylinder 33, whereby a ring space 36 is formed. The abutment surface 37 of the cylinder 33 acts as a piston. The cylinder 33 is returned to its initial position by a spring 38 which rests 15 on a body 39 fixed to the body tube 13 by a screw 40. The ball bearings of the shafts are numbered 41. The cutting piece of the cutting blades 42 is numbered 43. The blades 42 are located in recesses 44 mounted on pins 45. The screws 46 are used to adjust the maximum opening angle of the blades 42. From the valve 9, a hydraulic hose 47 leads to the cylinder 33, which controls the compressive force of the chains 24.

The pipe opening divider and root cutter according to the invention are used in the following manner. If the pipe to be opened is -, for example, the sewer pipe is driven by a car with a hydraulic machine and a power supply 25 next to the sewer. The pipe opening and 6 are connected to the hydraulic hoses 3 by means of quick connectors 5. The hydraulic pipe opener and the root cutter are placed in the pipe to be opened. The slide valve connects the hydraulic fluid to the hydraulic motor 10. The valve 30 2 also directs the pressure to the cylinder 33. The hydraulic motor 10 rotates via a clutch 11 a shaft 12 on which a gear 15 is placed. chains 24. 35 Since there are 3 driving chains 24 radially, they 5 93248 automatically center the device.

When the pressure in the integrated cylinder 33 rises sufficiently, it overcomes the spring force of the spring 38, and opens the spreading mechanism 30 and 31 of the chain 24, which operates like a normal 5 lever mechanism.

By increasing and decreasing the volume flow of hydraulic fluid, the rotational speed of the blades 42 and the drawing speed of the chain 24 are controlled. As the blades 42 encounter an obstacle, the pressure in the system increases. The force 10 transmitted by the hydraulic cylinder 33 increases, and the chains 24 bite more tightly against the pipe. In other words, the device is prevented from rotating during rapid changes in blade stress.

The blades 42 open to their maximum width, which is limited by a screw 46 by centrifugal force. If the blade 15 does not reach the set width, its outer edge will be ground against the tube, causing self-sharpening. Because the blades 42 are curved along their entire length, they do not adhere to the joints of the tube.

A TV camera 20 can be attached to the frame 39, with which 20 is able to monitor the progress of the pipe opening work. Because the blades 42 rotate slowly, no spatter is generated and monitoring is greatly facilitated.

Once the desired part of the tube has been opened, the current direction is reversed, and the device returns to its initial position with chains 24 pull-25 i. Of course, it is also possible to remove the flow and pressure, whereby the spring 38 pushes the cylinder 33 to its initial position, and the spreading mechanisms 30 and 31 are contracted. The device can then be pulled out of the tube.

Claims (7)

1. Hydraulic pipe opener and root cutter, by means of which congestions in pipes or the like are opened or therein 5 grown roots are cut off and which include in the system the necessary electrical and hydraulic units (1), control valves (2), hydraulic hoses (3) and a hydraulic pipe opener and root cutter (6) comprising a hydraulic motor (10), chains (24), chain mechanisms (30 and 31), a frame (39), a shaft 10 (12) and cutters (42), characterized in that - the root cutter drive device is in a manner known per se a hydraulic motor (10) driving movable chains (24) and rotary cutters (42), - the control valves (2) for the inlet and / or outlet flow regulate the volume flow and pressure level in intention regulating the rotational speed and torque of the hydraulic motor (10), and that the clamping force of the chains (24) against the pipe can be controlled by a hydraulic cylinder (33) which is controlled by said valves (2) and that the hydraulic pipe opener and the root cutter (6) are on one in itself known manner self-centering thanks to the radially placed chains (24), and that the clamping force of the chains (24) increases as the torque of the cutter (42) increases. 2. Device according to claim 1, characterized in that the hydraulic cylinder (33) for the clamping force of the chains (24) is arranged around a stub tube (13), that widening means (30 and 31) are guided against the cylinder (33), the widening means (30 and 31) together form linkage mechanisms for clamping the chains (24) against the walls of the pipe, and said linkage mechanism being compressed under the action of a spring (38). 3. Device according to claim 1, characterized in that the curved inserts (42) are stored at peripheral pins (45) in a holder (43) for the insert, so that the maximum width can be adjusted by means of 93248 screws. (46) in the holder of the insert (42). 4. Cutters (42) according to claim 3, characterized in that they sharpen themselves as they scrape the pipe walls. 5. Device according to claim 1, characterized in that the diameter of pipes to be cut open is greatly changed, the device (6) is provided with larger and / or smaller cutters (42) and widening means (30 and 31), the operating area being expanded therein. these are changed. Device according to claim 1, characterized in that a television camera is connected to the body (39), with which monitoring is performed and the end result is checked. 7. Device according to claim 1, characterized in that either hydraulic oil is used as either mineral oil or the environmentally friendly plant oil or water.