JP3225309B2 - Drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the removal of cables from underground pipes, the excavation and cleaning of heat exchangers and transport pipes in chemical plants, the cleaning of drains in sewer pipes, and the digging of buried holes in pipes and electric wires. It relates to a drilling rig used.

[0002]

2. Description of the Related Art For physically and mechanically removing hard waste such as aged cables in underground pipes and scales deposited in tubes and various pipes of a heat exchanger, a cutter is conventionally used. A device or a jet drill that inserts the attached shaft into a pipe and applies rotation and thrust to the shaft from outside the pipe to excavate has been used.

However, the hard waste in the pipe after drilling with a cutter or drill becomes difficult to discharge from the inside of the pipe as the pipe becomes longer. Every time a certain amount of excavation is performed, it is necessary to pull out the cutter bit at the tip from the inside of the pipe and discharge the excavated waste from the inside of the pipe.

In the case of a jet drill, rotation is given to the shaft from the outside of the tube. The longer the rotating shaft portion inserted into the tube, the worse the workability due to the bending of the shaft and the like, and the work to be engaged in There was a problem that it was necessary to increase the number of people.

[0005] In addition, when the object to be excavated is a curved pipe, there is a problem that the longer the pipe is, the more difficult it is to transmit the rotational torque to the cutter bit, and the deeper the pipe is, the more difficult the excavation work is.

An excavator disclosed in Japanese Patent Application Laid-Open No. 7-75228 solves such a problem. In this excavator, a high-output hydraulic motor that applies a rotational force to the excavating blade is provided, and excavation waste generated by excavation is drained from the high-output hydraulic motor, and a high-hydraulic injection nozzle disposed in the high-output hydraulic motor. It is discharged by generating a water flow in the borehole.

[0007]

However, according to the drilling apparatus disclosed in Japanese Patent Application Laid-Open No. 7-75228, the flow rate of the drainage water in the drilling hole becomes gentler as the distance from the injection nozzle increases, but the specific gravity is large. In the case of excavation debris, there was a risk of sedimentation and clogging in the excavation hole. In addition, a propulsion shaft and a high-pressure water hose connected to a high-output hydraulic motor were inserted into the borehole, but if the flow rate of the discharged water was low, drilling debris became entangled with them and caused clogging. .

[0008] In addition, since long and continuous excavation waste generated when excavating waste such as resin is easily clogged, it is necessary to reduce the excavation efficiency by intermittently sending excavation or reducing the excavation speed. there were.

If there is a bend or slope in the hole or pipe,
Water tends to accumulate inside, and it was necessary to drain water after excavation. In addition, when the feeder with one feed screw shaft is a rack and pinion type, the mounting direction is limited. In the case of a normal screw feeder, a guide mechanism is required to prevent the movable parts from rotating together. However, there is a problem in that the structure is complicated, the weight increases, and the portability deteriorates.

The present invention has been made in view of the above problems, and an object of the present invention is to enable continuous discharge of excavated waste and drainage, thereby eliminating the operation of discharging excavated waste. In addition to the high efficiency of the work, the burden on the operator is reduced, and the drilling hole or pipe can be collected and discharged with almost no drilling debris and drainage, and the water is recycled. An object of the present invention is to provide a drilling rig that can reduce the total amount of water.

[0011]

In order to achieve the above object, an excavator according to the first aspect of the present invention has a rotary operation.
A digging blade for excavating more excavated objects,
Has a rotating blade that rotates and shears the cuttings between the fixed blade
Promote the digging edge mechanism section for and a cutting blade shredding, hydraulically rotational force imparting means for imparting rotation to the digging edge of such digging edge mechanism, the digging edge mechanism and hydraulic rotational force applying means A propulsion shaft, a propulsion mechanism that applies a propulsive force to the propulsion shaft, a drainage unit that causes drilling chips to flow backward by drainage from the hydraulic rotational force applying unit, and accelerates the drilling chips discharged by the drainage unit. A forced digging waste discharging means for sucking by utilizing a negative pressure generated by the jet flow and increasing the pressure for discharge.

Accordingly, the excavating blade of the excavating blade mechanism section is rotated by the hydraulic rotary force applying means to excavate the object to be excavated, and the propulsion mechanism applies a propulsive force to the propulsion shaft to thereby provide the excavating blade mechanism. Part and the hydraulic turning force applying means, the drilling chips are drained backward by the drainage from the hydraulic turning force applying means, and excavation is performed using the negative pressure generated by the jet stream accelerated by the forced cutting chips discharging means. Debris can be suctioned and discharged with increased pressure. In addition,
The excavating blade mechanism excavates an object to be excavated by rotating
Excavation between the cutting blade and the fixed blade that rotates with this cutting blade
Cutting blade having a rotary blade for shearing debris
Therefore, long excavated waste generated by excavation of resin etc.
It can be shredded and clogging of excavation debris is less likely to occur.

[0013] For this reason, it is possible to continuously discharge the excavated waste and the wastewater, and the work of discharging the excavated waste can be omitted, so that the operation becomes highly efficient and the burden on the operator is reduced. Also,
Since the drilling holes or pipes can be collected and discharged without leaving drilling debris and drainage, the total amount of water when the water is recycled can be reduced.

According to another aspect of the present invention, there is provided an excavating apparatus according to the first aspect of the present invention, wherein the forced excavation chip discharging means is a jet pump.

Therefore, the same operation as the operation of the excavator according to the first aspect of the present invention can be achieved.

According to a third aspect of the present invention, there is provided an excavator according to the first aspect, wherein the forced excavation dust discharging means includes a jet pump and a jet pump. Air mixing means for mixing air with the jet water stream.

Therefore, not only can the same operation as that of the excavator according to the first aspect of the present invention be achieved, but also by mixing air with the jet water flow of the jet pump,
It is possible to further improve the excavating waste discharging ability.

[0018] In addition, in order to achieve the above object, claim
An excavator according to the invention of claim 4 is the excavator of claim 1 or claim 2
Alternatively, in the excavator according to claim 3, the propulsion mechanism has a plurality of feed screw shafts, and has a configuration in which a slider is moved by screw feed of the feed screw shafts to propel the propulsion shaft.

Therefore, not only can the operation of the excavator according to the first aspect of the invention be achieved, but also the propulsion mechanism can be reduced in size and weight because the slider is moved by screw feed of a plurality of feed screw shafts. The use of this propulsion mechanism makes it possible to perform excavation work in a narrow place, for example, in a manhole.

[0020] In addition, in order to achieve the above object, claim
The excavator according to the invention of claim 5 is the excavator according to claim 1 or 2
Alternatively, in the excavator according to claim 3 or 4, the hydraulic rotational force applying means is a high-output hydraulic motor that rotates by high-pressure water pressure, and the discharge means is an injection nozzle.

Therefore, the same operation as that of the excavator according to the first, second, third, or fourth aspect of the invention can be achieved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a drilling apparatus according to the present invention will be described below. FIG. 1 is a longitudinal sectional view of the excavator of the present invention, and FIG. 2 is a longitudinal sectional view of a propulsion mechanism in the excavator.

The excavator 1 according to the present invention comprises a propulsion mechanism 2
, A propulsion shaft 3, and a high-output hydraulic motor 4 as a hydraulic drive unit attached to the tip of the propulsion shaft 3.
And a swarf discharging mechanism 6 including a jet pump 6A as a swarf discharging means, and a swarf discharging mechanism 6 as a slicing means driven and connected to the high-output hydraulic motor 4.

As shown in FIG. 2, the propulsion mechanism 2 includes a frame 10 in which front and rear holding members 7 and 8 are connected by a connecting member 9.
A pair of feed screw shafts 11 and 12 are attached to the frame 10 with their front and rear ends rotatably held by holding members 7 and 8, respectively. The rear ends of 11 and 12 penetrate the holding member 8, and gears 13 and 14 are fixed to the penetrating ends. A feed handle 15 is rotatably provided at the center of the rear holding member 8, and a drive gear 16 is fixed to a shaft 15A of the feed handle 15. The drive gear 16 is provided with idle gears 17, 18 supported by the holding member 8.
The gears 13 and 14 are linked to each other through gears. The arrangement relationship between the feed screw shafts 11 and 12 and the propulsion shaft 3 may be as shown in FIG.

Nut members 20 and 21 fixed to a slider 19 are screwed to the feed screw shafts 11 and 12, and the propulsion shaft is connected to the center of the front surface of the slider 19 via a joint member 22. 3 are connected at the rear end. The propulsion shaft 3 includes a plurality of shaft elements 3
A, and the adjacent shaft elements 3A are connected to each other via a universal joint 23 such as a universal joint, and can be bent at a part of the universal joint 23. The front end of the propulsion shaft 3 is fixed to the center of the rear surface of the casing 24 of the high-output hydraulic motor 4.

As shown in FIG. 5, a roller mechanism 25 is provided around the shaft element 3A of the propulsion shaft 3.
Is provided. The roller mechanism 25 includes a shaft 3
A roller 27 made of synthetic resin is pivotally supported on a roller support bracket 26 provided on the outer peripheral portion of A at intervals in the circumferential direction. The arrangement and the roller diameter of the roller 27 ensure spaces a and b for passing a high-pressure water hose 28 for supplying high-pressure water to the high-output hydraulic motor 4 and a low-pressure drain hose 29 having a larger diameter than the high-pressure water hose 28. The roller diameter of the lower roller 27 is larger than the roller diameter of the upper roller 27.

The high-output hydraulic motor 4 has a built-in turbine and a speed reducer (not shown). A high-pressure water hose 28 is inserted through the rear surface of the casing 24 of the high-output hydraulic motor 4. The water hose 28 is connected to the inlet side of the turbine. The high-pressure water hose 28 passes through the space a between the upper rollers 27 and is substantially parallel to the propulsion shaft 3. The high-pressure water hose 28 is supplied with high-pressure water from a high-pressure water supply device (not shown). Has become.

The high-output hydraulic motor 4 is provided with a low-pressure injection nozzle 29 and a high-pressure injection nozzle 30 as drainage means.

The casing 2 of the high-output hydraulic motor 4
The excavation blade mechanism 5 is mounted on the front end of the drill 4. The excavating blade mechanism 5 includes, as shown in FIG.
A cutting blade 32 for shredding is provided, and the cutting blade 32 for shredding includes a fixed blade 33 and a rotary blade 34.

The excavating blade 31 has not only a blade portion 35 on its front surface but also the rotary blade 34 on its rear surface.
The high output hydraulic motor 4 is connected to an output shaft 55 connected to a turbine. The fixed blade 33 is fixed to a fixed blade holding member 56 fixed to the front portion of the casing 24.
The fixed blade 33 is opposed to the rotary blade 34 with a predetermined gap. The fixed blade 33 is movable in the front-rear direction so that a gap between the fixed blade 33 and the rotary blade 34 can be maintained by a spring or the like. Also, a safety device for avoiding a trouble can be provided.

The chip discharge mechanism 6 includes a jet pump 6
The jet pump 6A is a pump that absorbs a fluid by using a negative pressure generated by an accelerated jet stream and increases the pressure to discharge the fluid. The jet pump 6A has a pump body 36 as shown in FIG.
a to the rear surface 36b, and a housing mounting hole 38 at the lower part.
An annular chamber 40 concentric with the housing mounting hole 38 is formed in the pump body 36. The chamber 40 communicates with the main passage 37 through a communication passage 41, and a plurality of water nozzles 42 are formed in the chamber 40 so as to be inclined backward and open to the housing mounting hole 38. is there.

A pump housing 44 is mounted in the housing mounting hole 38 of the pump body 36 at a portion of a straight pipe portion 44A. This pump housing 4
Reference numeral 4 denotes a funnel-shaped suction pipe 45 connected to the front end of the straight pipe 44A, and a funnel-shaped discharge pipe 46 connected to the rear end of the straight pipe 44A. And the straight pipe portion 44A
Has a plurality of spray holes 48 formed in the spray direction of the water nozzle 42. In order to collect the excavated waste more reliably, the opening 45A of the funnel-shaped suction pipe portion 45 is required.
May be extended to fill the tube 51 as shown by the phantom line in FIG.

The high-pressure water hose 28 is divided into front and rear parts in the middle thereof.
8 is connected to the front end of the main passage 37 of the jet pump 6A, the rear end of the high-pressure water hose 28 is connected to the rear end of the main passage 37, The jet pump 6A is connected to the high-output hydraulic motor 4
The suction pipe part 45 is positioned and arranged at the rear, and a low-pressure drain hose 49 is connected to the discharge pipe part 46.

Next, the inside of the pipe 51 is excavated by the excavator constructed as described above. In the propulsion mechanism 2, the drive gear 16 is rotated by rotating the feed handle 15, the gears 13 and 14 are rotated via the idle gears 17 and 18, and the feed screw shafts 11 and 12 are rotated to The slider 1 is moved by the feed function of the members 20 and 21.
9 is advanced, and the high-output hydraulic motor 4 is advanced via the propulsion shaft 3.

Then, high-pressure water is supplied from the high-pressure water supply device to the high-output hydraulic motor 4 via the high-pressure water hose 28,
The water pressure drives a motor, ie, a turbine and a speed reducer, incorporated in the high-output hydraulic motor 4, whereby the excavating blade 31 attached to the tip of the output shaft 55 is rotated, and the machine of the hard waste 52 that blocks the inside of the pipe 51 is machined. Mechanical cutting is performed. In addition, if drilling debris that is long connected occurs,
Excavation chips are finely chopped by the shearing action of the fixed blade 33 and the rotary blade 34, so that fine excavation chips with good dischargeability are obtained. At the same time, the cut portion by the excavating blade 31 is washed by the water pressure injected from the high-pressure injection nozzle 30.

Further, the drain water of the cleaning liquid is discharged backward by the water pressure injected from the high-pressure injection nozzle 30 and the low-pressure injection nozzle 29, whereby the cutting chips are strongly pushed backward together with the drain water. In particular, the high-pressure injection nozzle 30 and the low-pressure injection nozzle 29 that inject rearward have a function of enhancing the discharge action of cutting chips and the like, and strongly push the removal object backward.

In this way, the cutting chips pushed backward are sucked into the suction pipe 45 by the negative pressure generated by the jet pump 6A, discharged from the discharge pipe 46, and discharged by the low-pressure drain hose 49. It is discharged outside. In this case, unlike the case where the water is directly discharged into the pipe 51, the flow velocity in the low-pressure drain hose 49 is high, and
Since the inner surface of 9 is smooth, cutting chips and the like do not settle in the drainage, and the cutting chips and the like are reliably discharged to the outside.

That is, in the jet pump 6A, high-pressure water is supplied to the chamber 40 from the high-pressure water hose 28 through the communication passage 41, and is converted into a jet stream accelerated from the plurality of water nozzles 42 to form a straight pipe. It is injected into the portion 44A. Therefore, a negative pressure generated by the accelerated jet flow is generated, and cutting chips and the like and drain water are drawn into the suction pipe section 4.
5 and is discharged from the discharge pipe 46 to the low-pressure drain hose 49.

The cutting chips or hard waste discharged by the low-pressure drain hose 49 are discharged to the ground by a disposal device (not shown).

FIG. 7 shows another embodiment of the chip discharge mechanism 6. The chip discharge mechanism 6 includes a jet pump 6
The jet pump 6A is a pump that absorbs a fluid by using a negative pressure generated by an accelerated jet stream, and increases the pressure to discharge the fluid. The jet pump 6A has a pump body 36. A main passage 37 extending from a front surface 36a to a rear surface 36b is provided at an upper portion of the pump body 36, and a housing mounting hole 38 is provided at a lower portion. , This housing mounting hole 38
An annular concave portion 39 is formed on the peripheral surface of the annular chamber 4.
0 is formed. The chamber 40 communicates with the main passage 37 via a communication passage 41, and a plurality of water nozzles 42 are formed in the chamber 40 so as to be inclined backward and open to the annular recess 39. The pump main body 36 is provided with an air passage 43 that passes through the rear surface 36b of the pump main body 36 to the annular concave portion 39.

A pump housing 44 is mounted in the housing mounting hole 38 of the pump body 36 at a portion of a straight pipe portion 44A. This pump housing 4
Reference numeral 4 denotes a funnel-shaped suction pipe 45 connected to the front end of the straight pipe 44A, and a funnel-shaped discharge pipe 46 connected to the rear end of the straight pipe 44A. And the straight pipe portion 44A
And the annular recess 39 constitute an air mixing chamber 47, and the inner peripheral surface of the air mixing chamber 47, that is, the straight pipe section 4.
4A, a plurality of injection holes 48 are formed so as to be positioned in the injection direction of the water nozzle 42.

In the jet pump 6A, high-pressure water is supplied to the chamber 40 from the high-pressure water hose 28 via the communication passage 41, and is converted into a jet stream accelerated from the plurality of water nozzles 42 to form an air stream. The gas is injected into the straight pipe portion 44A from the outlet through the mixing chamber 47. Therefore,
Negative pressure generated by the accelerated jet flow is generated, so that cutting chips and the like and drain water are sucked from the suction pipe 45 and discharged to the low-pressure drain hose 49 from the discharge pipe 46.

On the other hand, from the air hose 50 to the air passage 4
The air is supplied to the air mixing chamber 47 via 3. Therefore, the air is mixed with the high-pressure jet water in the air mixing chamber 47. High-pressure water is injected while entraining the surrounding air. However, compared to direct injection into water, high-pressure water has less resistance, so the injection energy is less likely to be attenuated. This constitutes a jet pump 6A.

The mixed air is made finer by high-pressure water and discharged by the jet pump 6A together with excavation chips and waste water. Discharge (discharge in deep holes) can be possible.

It should be noted that the above-described excavator is provided with an underground pipe 51.
The use of the drilling rig of the present invention is not limited to the above, but the drilling rig of the present invention may be used for other purposes such as drilling of heat exchangers (particularly scale-blocked) and transport pipe drilling in a chemical plant. It can be used for excavation in sewer pipes.

[0046]

As described above, according to the excavating apparatus according to the first aspect of the present invention, the object to be excavated is excavated by the rotation operation.
The cutting edge of the cutting blade and the fixed blade rotating with the cutting blade
A cutting blade having a rotary blade for shearing cuttings between
The excavating blade mechanism, the hydraulic rotating means for applying rotation to the excavating blade of the excavating blade mechanism, the propulsion shaft for propelling the excavating blade mechanism and the hydraulic rotating force applying means, and the propulsion shaft. A propulsion mechanism that provides propulsion;
Drainage means for draining drilling debris backward by drainage from the hydraulic rotation applying means, and drilling debris discharged by the drainage means are suctioned using negative pressure generated by the accelerated jet flow, and the pressure is reduced. And a forced excavation dust discharging means for raising and discharging, the hydraulic rotary force applying means rotates the excavating blade of the excavating blade mechanism, excavates an object to be excavated with the excavating blade, and uses a propulsion mechanism to drive a propulsion shaft. The excavating blade mechanism section and the hydraulic rotating force applying means are propelled by applying a propulsive force to the water, and the drilling chips are drained backward by drainage from the hydraulic rotating force applying means, and accelerated by the forced excavating chip discharging means. Utilizing the negative pressure generated by the jet flow, the drilling debris can be sucked and discharged at an increased pressure. In addition,
The excavating blade mechanism excavates an object to be excavated by rotating
Excavation between the cutting blade and the fixed blade that rotates with this cutting blade
Cutting blade having a rotary blade for shearing debris
Therefore, long excavated waste generated by excavation of resin etc.
It can be shredded and clogging of excavation debris is less likely to occur.

For this reason, it becomes possible to continuously discharge the excavated waste and the waste water, and the operation of discharging the excavated waste can be omitted, so that the operation becomes highly efficient and the burden on the operator is reduced. Also,
Since the drilling holes or pipes can be collected and discharged without leaving drilling debris and drainage, the total amount of water when the water is recycled can be reduced.

According to the second aspect of the present invention, in the first aspect of the present invention, the forced excavation chip discharging means is a jet pump. The same effect as that of the drilling rig can be achieved.

According to a third aspect of the present invention, in the first aspect of the present invention, the forced digging dust discharging means mixes air with a jet pump and a jet water stream of the jet pump. By having the air mixing means, not only can the same effect as the effect of the drilling apparatus according to the first aspect of the present invention be exerted, but also, by mixing air with the jet water flow of the jet pump, the discharging capability of the drilling debris can be improved. It can be further improved.

According to the excavator according to the fourth aspect of the present invention, in the excavator according to the first or second or third aspect, the propulsion mechanism has a plurality of feed screw shafts, By having a configuration in which the slider is moved by screw feed of these feed screw shafts to propel the propulsion shaft, not only the same effect as the above-described excavator according to the invention of claim 1 can be obtained, but also the propulsion mechanism of the propulsion mechanism can be obtained. Downsizing,
Lighter weight is possible, and the use of this propulsion mechanism may allow for excavation work in narrow spaces, for example, in manholes.

According to a fifth aspect of the present invention, there is provided the excavator according to the first, second, third, or fourth aspect, wherein the hydraulic rotational force applying means is configured to control the pressure of the high-pressure water. Is a high-output hydraulic motor that rotates with
Since the discharge means is an injection nozzle, the same effect as the above-described effect of the excavator according to the first aspect of the present invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an excavator according to the present invention.

FIG. 2 is a longitudinal sectional view of a propulsion mechanism in the excavator.

FIG. 3A is an explanatory view showing an arrangement relationship between a feed screw shaft and a propulsion shaft of the propulsion mechanism. (2) is an explanatory view showing another arrangement relation between the feed screw shaft and the propulsion shaft of the propulsion mechanism.

FIG. 4 (1) is a side view of a digging blade mechanism in the digging apparatus. (2) is a top view of the digging blade mechanism part in the same digging apparatus.

FIG. 5 is a sectional view of a roller mechanism.

FIG. 6 is an enlarged detailed view of a portion A in FIG. 1;

FIG. 7 is a cross-sectional view of another embodiment of a chip discharge mechanism.

[Explanation of symbols]

 2 Propulsion mechanism 3 Propulsion shaft 4 High output water pressure motor 5 Drilling blade mechanism 6A Jet pump 31 Drilling blade

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-185491 (JP, A) JP-A-56-41499 (JP, A) JP-A-57-58799 (JP, A) JP-A-63-1984 138200 (JP, A) Hikaru Hei 2-7399 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 1/06

Claims (5)

(57) [Claims] An excavating blade for excavating an object to be excavated by a rotary operation.
And rotate with this excavation blade to remove excavated debris between the fixed blade.
A digging edge assembly with a shredding cutter having a rotating blade to shear, hydraulically rotational force imparting means for imparting rotation to the digging edge of such digging edge mechanism, the digging edge mechanism and hydraulic rotation A propulsion shaft for propelling the force applying means, a propulsion mechanism for applying a propulsive force to the propulsion shaft, a drainage means for causing drilling chips to flow backward by drainage from the hydraulic rotational force applying means, Drilling debris
An excavator, comprising: forced excavation chip discharging means for sucking using a negative pressure generated by the accelerated jet flow, increasing the pressure, and discharging. 2. The excavator according to claim 1, wherein the forced excavation chip discharging means is a jet pump. 3. The excavator according to claim 1, wherein said forced swarf discharging means includes a jet pump and an air mixing means for mixing air into a jet stream of the jet pump. 4. The propulsion mechanism according to claim 1, wherein the propulsion mechanism has a plurality of feed screw shafts, and the propulsion shaft is propelled by moving a slider by screw feed of the feed screw shafts. An excavator according to claim 3. 5. The hydraulic pressure applying means according to claim 1, wherein said hydraulic rotational force applying means is a high output hydraulic motor which rotates by the pressure of high pressure water, and said discharging means is an injection nozzle.
Or the excavator according to claim 4.