JPH08109657A - Sediment removal device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sediment removing device capable of removing sediment in a short time. A bucket 18 having a bucket main body 24, a nozzle 25 provided with a rear injection port 51 opening in the direction of the bucket main body 24 and a front injection port 53 opening in the opposite direction, and a pumping means for pumping water to the nozzle 25. 19, the water sprayed from the front injection port 53 breaks down the earth and sand below, and the water sprayed from the rear injection port 51 generates downward thrust on the bucket 18 and collapses on the side of the bucket. The sand and sand that have been pushed up are moved upward by moving the pushed sand and sand upward, and by stopping the pressure feed of water in this state, the bucket body 2 is opened from the opening 22.
Fill in 4 In this state, the bucket 18 is pulled up to remove the earth and sand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sediment removing device for removing sediment, and more particularly to a sediment removing device capable of shortening working time.

[0002]

2. Description of the Related Art As an example of earth and sand removing work for removing earth and sand, sand filled for the purpose of supporting an inner pipe between an outer pipe and an inner pipe of a double pipe structure vertically piped in the ground There is a work to remove the inner pipe in order to replace it. The above-mentioned removal work is conventionally performed by injecting high-pressure water into the sand filled between the outer pipe and the inner pipe to break it, and removing the broken sand while suctioning it with water under vacuum pressure. It is done by.

[0003]

However, the method of sucking the collapsed sand together with water under vacuum pressure requires a huge amount of work time. Therefore, an object of the present invention is to provide a sediment removing device capable of removing sediment in a short time.

[0004]

According to the first aspect of the present invention,
A bucket body provided with an opening on one side, and provided on the opposite side to the opening of the bucket body,
A bucket having a rear jet opening that opens in the direction of the bucket body and a nozzle that is provided with a front jet opening that opens in the opposite direction to the bucket body, and the rear jet port that pumps water to the nozzle of the bucket. And a pumping means for jetting from a front jet port.

According to a second aspect of the present invention, the invention according to the first aspect is characterized in that the bucket is provided with a hoisting means for hoisting the bucket with the opening portion facing upward.

The invention according to claim 3 is the invention according to claim 1 or 2.
The nozzle described above is characterized in that the nozzle has two stages of the rear injection port, which are offset in position on the bucket body side and on the opposite side to the bucket body.

The invention according to claim 4 relates to the invention according to any one of claims 1 to 3, wherein the bucket is
A lid body having a pipe body, one side of which penetrates the inside of the bucket body and is connected to the nozzle, and the other side of which projects from the opening portion and is connected to the pressure feeding means, and which can close the opening portion of the bucket body. Is provided so as to be movable along the pipe body.

According to a fifth aspect of the present invention, in the bucket body according to any one of the first to fourth aspects, the bucket body includes a tip end portion on the nozzle side, a rear end portion on the opening side, and the tip ends thereof. And a middle part between the rear end and the rear end.

According to a sixth aspect of the present invention, in the bucket body according to any one of the first to fifth aspects, the bucket body is provided with a drain mesh portion for communicating the inside and the outside. I am trying.

[0010]

According to the first aspect of the invention, when the bucket is in a state in which the nozzle is on the lower side and water is jetted from the rear jet port and the front jet port of the nozzle by the pressure feeding means, the water is jetted from the front jet port. The water will cause the lower sediment to collapse, and the water jetted from the rear injection port will generate downward thrust on the bucket to move downward in the collapsed sediment and to the side of the bucket. Push up some collapsed earth and sand mixed with water. Then, when the pressure feeding of the water by the pressure feeding means is stopped, the earth and sand that have been pushed upward move downward and are filled in the bucket body from the opening provided on the opposite side to the nozzle, that is, on the upper side. In this state, the bucket is pulled up to remove the earth and sand, and such work is repeated appropriately.

According to the second aspect of the invention, since the bucket filled with earth and sand is hoisted by the hoisting means, it is not necessary to manually hoist it.

According to the third aspect of the invention, the nozzle is
Since the rear injection ports have two stages that are displaced on the bucket body side and on the opposite side to the bucket body, the injection angles can be easily made different between the rear injection ports of each stage. .

According to the fourth aspect of the present invention, since the lid body that can close the opening of the bucket body is provided so as to be movable along the pipe body that penetrates through the bucket body and projects from the opening, The lid body is lifted up together with the earth and sand by jetting water from the rear jet port of the nozzle, and when the jetting of water is stopped, the lid moves downward and moves downward to close the opening.

According to the fifth aspect of the invention, the bucket body can be divided into a tip end on the nozzle side, a rear end on the opening side, and an intermediate portion between the front end and the rear end. , The length of the bucket body can be changed by changing only the middle portion.

According to the sixth aspect of the invention, since the water is drained from the mesh portion provided in the bucket body for communicating the inside and outside, only the earth and sand are pulled up by the bucket.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sediment removing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, as an example of earth and sand removal work for removing earth and sand, sand filled between the outer pipe and inner pipe of the double pipe structure vertically piped in the ground, An explanation will be given by taking as an example the case where the pipe is removed to replace the pipe.

In the figure, reference numeral 11 is the ground, and reference numeral 12 is the ground 11.
A vertical shaft formed at 1, a reference numeral 13 denotes an outer pipe fitted to the vertical shaft 12, a reference numeral 14 denotes an inner pipe having a diameter smaller than that of the outer pipe 13 fitted coaxially in the outer pipe 13, and a reference numeral 15 denotes an inner pipe. The sand filled between the outer pipe 13 and the inner pipe 14 for the purpose of supporting 14 and the reference numeral 16 respectively indicate a sediment removing device for removing the filled sand. Here, in order to temporarily position the inner pipe 14 before the sand 15 is filled, a plurality of plate-shaped vibration damping members (not shown) extending outward from the outer peripheral portion in a radial direction are formed in a radial pattern. None provided.

The earth and sand removing device 16 of this embodiment uses sand 15
A bucket 18 for removing water, a pumping means 19 for pumping water to the bucket 18, and a hoisting means 20 for hoisting the bucket 18.

First, the bucket 18 will be described. As shown in FIG. 2, the bucket 18 has a substantially cylindrical bucket main body 24 having an opening 22 at one end and a tapered taper 23 at the other end, and the opening 22 of the bucket main body 24. It has a nozzle 25 provided on the opposite side, and a tube body 26 that is connected to the nozzle 25 by penetrating the inside of the bucket body 24 from the opening 22 side and connecting the nozzle 25 to the nozzle 25.

The bucket main body 24 has a tip end divided body (tip portion) 28 on the nozzle 25 side, which comprises a tapered portion 23 and a cylindrical portion 27, and a cylindrical rear end divided body (rear end portion) on the opening 22 side. 29, and a cylindrical intermediate division body (intermediate portion) 30 between them, the outer diameter of the cylindrical portion 27 of the tip division body 28, the outer diameter of the intermediate division body 30, and the rear end division. Body 2
The outer diameter of 9 is made equal. Then, these are screwed together with a female screw (not shown) formed on the inner circumference of the end portion on the side opposite to the taper portion 23 of the tip divided body 28 and a male screw (not shown) formed on the outer circumference of one end of the intermediate divided body 30. Then, a female screw (not shown) formed on the inner circumference of the other end of the intermediate split body 30 and a male screw (not shown) formed on the outer circumference of the end portion of the rear end split body 29 opposite to the opening 22 are screwed together. By doing so, they are coaxially integrated.

A nozzle 25 is coaxially fixed to the outside of the tip of the tapered portion 23 by screwing or the like, and a cylindrical tip support portion 32 is coaxially fixed to the inside of the tip of the tapered portion 23. There is.

An annular groove portion 33, which is recessed from the outer peripheral portion by one step, is formed in an intermediate range in the axial direction of the intermediate divided body 30, and a length extending along the axial direction is within the range of the annular groove portion 33. A plurality of holes 34 are formed so as to penetrate the inner and outer circumferences. A wire mesh 35 is wound around the annular groove 33 so as to cover all of the elongated holes 34, and the drainage mesh portion 36 is formed by the elongated holes 34 and the wire mesh 35.
Is configured. Here, the outer diameter of the wire net 35 wound around the annular groove 33 is equal to the outer diameter of the portion of the intermediate divided body 30 excluding the annular groove 33 so that there is no step.

A cylindrical intermediate supporting portion 38 is coaxially fixed to the rear end divided body 29 at a predetermined intermediate position by a plurality of plate-like brackets 39 radially extending from the outer peripheral portion thereof. There is. Here, the opening 22 of the rear end divided body 29
Has a chamfered inner periphery.

The pipe body 26 is fitted and supported by the tip support portion 32 and the intermediate support portion 38 of the bucket body 24, and the joint portion 4 is provided at the end portion protruding from the opening portion 22.
1 is fixed. The pressure feeding means 1 is provided in the joint portion 41.
9, a joint portion 43 fixed to a high pressure hose 42 described later is engaged, and in this state, the high pressure hose 42 and the tubular body 2
The interior of 6 is in communication with.

A lid 45 is movably provided between the intermediate support portion 38 and the joint portion 41 of the tubular body 26 so as to come into contact with and separate from the opening 22. The lid body 45 has a conical shape, and a cylindrical guide portion 46 into which the tube body 26 is movably fitted is formed on the inner end side of the lid body 45. The bent portion 47 has a shape that is bent at about °. The lid body 45 has a maximum outer diameter substantially equal to the outer diameter of the bucket body 24, and is supported by the pipe body 26 with the guide portion 46 on the bucket body 24 side. Opening 22
It is possible to close it by abutting against.

The nozzle 25 has a substantially conical first nozzle portion 49 and a substantially conical second nozzle portion 50 coaxially fixed on the opposite side of the bucket body 24 of the first nozzle portion 49. Have

The first nozzle portion 49 includes a bucket body 24.
Direction, a plurality of first rear injection ports 51 that are opened at a predetermined angle with respect to the axis of the first nozzle portion 49 along the same direction as the taper portion 23 are provided in the circumferential direction at a predetermined equal pitch. The bucket body 2 is attached to the second nozzle portion 50.
A plurality of second rear injection ports 52, which are opened at a predetermined angle with respect to the axis of the second nozzle portion 50 in four directions, are provided at a predetermined equal pitch in the circumferential direction. As a result, the nozzle 25 shifts its position between the bucket body 24 side and the opposite side of the bucket body 24, and the two-stage rear injection ports 51,
Will have 52.

Further, the second nozzle portion 50 is provided with a front injection port 53 which opens in the opposite direction to the bucket body 24 along the axial direction.

Here, the inside of the pipe body 26 and the inside of the nozzle 25 are communicated with each other, and the water introduced through the pipe body 26 has a first rear jet outlet 51, a second rear jet outlet 52 and a front jet. It will be injected from each of the mouths 53.

It should be noted that the first rear jet port 51 is formed at a relatively small angle (for example, about 20 °) with the axial direction of the first nozzle portion 49, and water is jetted at substantially this angle. In addition, the second rear injection port 52 is the second nozzle portion 5
The angle formed with the 0 axis direction is larger than the above angle (for example, about 35 °), and water is jetted at substantially this angle. Further, the water jetted from the front jet port 53 is jetted in a relatively wide range so as to form a conical shape. Further, the inner diameters of the first rear jet outlet 51, the second rear jet outlet 52, and the front jet outlet 53 are appropriately set according to the amount of water jetted from each.

Next, the pressure feeding means 19 will be described. The pressure feeding means 19 has a high pressure hose 42 connected to the pipe body 26 by a joint portion 43, and a high pressure water supply vehicle 55 that supplies water to the high pressure hose 42 at high pressure. A winding device 56 that winds and unwinds the high-pressure hose 42 is provided in the. Here, the high-pressure water supply vehicle 55 is, concretely, at a pressure of 400 kg / cm ^{2 at} a rate of 1
The one that can pump 30 liters of water under pressure is used.

Next, the lifting means 20 will be described.
The hoisting means 20 has a tower 58 assembled above the sand 15 to be removed, a rotatable pulley 59 supported by the tower 58, one end of which is connected to the joint portion 43, and an intermediate portion of which is a pulley 59. It has a wire 60 to be wound around the wire 60 and a hoisting device 61 which is connected to the other end of the wire 60 to wind up and unwind the wire 60. The high pressure hose 42 of the pressure feeding means 19 is also hooked on the pulley 59.

According to the earth and sand removing device 16 of the present embodiment having the above-described structure, first, the bucket 18 in the state of being lifted by the lifting means 20 has the outer pipe 13 with the nozzle 25 facing downward. And the inner tube 14 will be arranged.

Then, in this state, the high-pressure water supply vehicle 55 of the pumping means 19 supplies water to the high-pressure hose 42 and the pipe 26.
When it is introduced into the nozzle 25 via the, water is jetted from the first rear jet port 51, the second rear jet port 52, and the front jet port 53 of the nozzle 25. As a result, the front injection port 53
The sand 15 below the nozzle 25 between the outer pipe 13 and the inner pipe 14 is destroyed by the water (the direction of which is indicated by the arrow A in FIG. 1) jetted from the first rear jet port 5
In the state in which the water jetted from No. 1 (the direction thereof is indicated by an arrow B in FIG. 1) generates downward thrust on the bucket 18 and the collapsed sand 15 on the side of the bucket 18 is mixed with water. It is pushed upward together with the lid 45.

At this time, the water jetted from the second rear jet port 52 of the nozzle 25 (the direction of which is indicated by the arrow C in FIG. 1) causes a force to act upward on the inner pipe 14. As a result, the inner pipe 14 rises.

During the above-mentioned operation, the hoisting device 6 for the hoisting means 20.
When the wire 60 is unwound by 1 and the high-pressure hose 42 is unwound by the winding device 56, the bucket 18 is moved downward in the collapsed sand 15 by the thrust. Then, in a state where the bucket 18 has moved to a predetermined depth, the high-pressure water supply vehicle 55 stops the pressure-feeding of water. Then, as shown in FIG. 3, the sand 15 that has been pushed upward moves downward and moves toward the nozzle 2 of the bucket 18.
5, the bucket main body 24 is filled through an opening 22 provided on the opposite side, that is, on the upper side. At this time, the lid 45
Will also move downward. Then, as shown in FIG. 4, the lid 45 closes the opening 22.

By winding the wire 60 with the hoisting device 61, the bucket 18 filled with the sand 15 is pulled up from the gap between the outer pipe 13 and the inner pipe 14, and the sand 15 is discharged from the bucket 18. The sand 15 is removed. Note that water is drained from the mesh portion 36 of the bucket body 24 when pulling up. Further, in order to prevent the slack of the high pressure hose 42, the winding device 56 winds the wire 60 in conjunction with the winding of the wire 60. Then, the bucket 18 from which the sand 15 has been discharged is newly suspended by the hoisting means 20 between the outer pipe 13 and the inner pipe 14, and the nozzle 25 side is sunk into the sand 15 that has been collapsed and remained last time by its own weight. Let Next, the water is pumped by the pumping means 19. By repeating the above-mentioned work appropriately, the sand 15 is removed and the raised inner pipe 14 is taken out as necessary.

The earth and sand removing device 1 of this embodiment described above
According to No. 6, since the sand 15 is collapsed by hydraulic pressure using the bucket 18 and the sand 15 is accommodated inside and removed, it is necessary to remove the collapsed sand 15 while sucking it together with water under vacuum pressure. Therefore, the sand 15 can be removed in a short time.

Further, since the bucket 18 filled with the sand 15 is hoisted by the hoisting means 20, it is not necessary to manually hoist it. Therefore, the removal work becomes easier and the work time can be shortened.

Further, since the nozzle 25 has the two stages of the first rear injection port 51 and the second rear injection port 52 which are displaced in the axial direction, the first rear injection port 51 and the second rear injection port 52 are provided. The injection angle can be easily changed by the mouth 52. That is, the injection angle from the first rear injection port 51 is made smaller with the axial direction of the bucket 18 so as to be optimal for generating thrust of the bucket 18 and pushing up the sand 15, and from the second rear injection port 52. The angle formed by the bucket 18 and the axial direction of the bucket 18 can be slightly increased so as to optimize the injection angle of (1) to push up the inner pipe 14 on the side, easily without considering the influence of mutual injection.

In addition, when pulling up the bucket 18,
Since the opening 22 of the bucket main body 24 filled with the sand 15 is closed by the lid 45, it is possible to prevent the sand 15 from spilling due to the shaking of the bucket 18.

Further, since the bucket body 24 can be divided into the front divided body 28, the intermediate divided body 30, and the rear divided body 29, the length of the bucket body 24 can be changed by changing only the intermediate divided body 29. it can. Therefore, even when it is necessary to change the length of the bucket body 24, the front end divided body 28 and the rear end divided body 29 can be shared, and the cost increase can be minimized. Further, even when it is expected that the length of the bucket main body 24 will be changed on site, it is possible to deal with it by preparing only the intermediate divided bodies 30 having different lengths, so that the labor for carrying to the site is reduced. it can.

Further, since basically only water is drained from the mesh portion 36 provided in the bucket body 24 for communicating the inside and outside, only the sand 15 is pulled up by the bucket 18. Therefore, the sand 15 can be removed efficiently.

When it is not necessary to raise the inner pipe 14, the nozzle 25 need not be provided with the second rear injection port 52, but only the first rear injection port 51 and the front injection port 53 are provided. Good.

Further, the bucket 18 is used as the high pressure hose 42.
If one having sufficient strength to withstand the pulling up of the high pressure hose and capable of securing the internal flow path at the time of pulling up is used, the high pressure hose 42 can be dealt with by winding and unwinding with the winding device 56. The device 61 becomes unnecessary. In this case, the high pressure hose 42 and the winding device 56 form a part of the lifting means 20.

Further, in the above embodiment, the case where the sand 15 filled between the outer pipe 13 and the inner pipe 14 of the double pipe is removed is described as an example, but the present invention is not limited to this. It is applicable to various other types of sediment removal.

[0047]

As described in detail above, according to the invention of claim 1, the bucket is in a state in which the nozzle is on the lower side,
When water is jetted from the rear jet port and the front jet port of the nozzle by the pressure-feeding means, the water that is jetted from the front jet port destroys the sediments below, and the water jetted from the rear jet port causes A downward thrust is generated to move downward in the collapsed earth and sand, and the collapsed earth and sand on the side of the bucket is pushed up in a state of being mixed with water. Then, when the pressure feeding of the water by the pressure feeding means is stopped, the earth and sand that have been pushed upward move downward and are filled in the bucket body from the opening provided on the opposite side to the nozzle, that is, on the upper side. In this state, the bucket is pulled up to remove the earth and sand, and such work is repeated appropriately. Therefore, since it is not necessary to remove the collapsed sand while sucking it together with water under a vacuum pressure, it is possible to remove the earth and sand in a short time.

According to the second aspect of the invention, since the bucket filled with earth and sand is hoisted by the hoisting means, it is not necessary to manually hoist it. Therefore, the removal work becomes easier and the work time can be shortened.

According to the third aspect of the invention, the nozzle is
Since the rear injection ports have two stages that are displaced on the bucket body side and on the opposite side to the bucket body, the injection angles can be easily made different between the rear injection ports of each stage. . Therefore, it is possible to easily set one of the steps to the optimum angle for generating the thrust of the bucket and pushing up the earth and sand, and the other step for pushing up the other side members.

According to the fourth aspect of the present invention, since the lid body that can close the opening of the bucket body is provided movably along the pipe body that penetrates through the bucket body and projects from the opening, The lid body is lifted up together with the earth and sand by jetting water from the rear jet port of the nozzle, and when the jetting of water is stopped, the lid moves downward and moves downward to close the opening. Therefore, at the time of pulling up, since the opening of the bucket main body filled with earth and sand is closed by the lid, it is possible to prevent spillage of earth and sand due to shaking of the bucket and the like.

According to the fifth aspect of the present invention, the bucket body can be divided into a nozzle-side tip portion, an opening-side rear end portion, and an intermediate portion between these tip and rear end portions. , The length of the bucket body can be changed by changing only the middle portion. Therefore, even when it is necessary to change the length of the bucket body, the front end portion and the rear end portion can be used in common, and the cost increase can be suppressed to the minimum. Also,
Even if it is expected that the length of the bucket body will be changed at the site, it is possible to deal with it by preparing the ones having different lengths only in the intermediate portion, and therefore the labor for carrying to the site can be reduced.

According to the sixth aspect of the invention, since the water is drained from the mesh portion provided in the bucket body for communicating the inside and outside, only the sediment is pulled up by the bucket. Therefore, sediments can be removed efficiently.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing one state when removing earth and sand by an earth and sand removing device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a bucket of the earth and sand removing device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing another state when removing the sediment by the sediment removing apparatus according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing still another state when removing the sediment by the sediment removing apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 11 Ground 12 Vertical Shaft 13 Outer Pipe 14 Inner Pipe 15 Sand (Soil and Sand) 16 Sediment Removal Device 18 Bucket 19 Pumping Means 20 Lifting Means 22 Opening 24 Bucket Main Body 25 Nozzle 26 Tubular 28 Tip Split Body (Tip) 29 Rear end divided body (rear end portion) 30 Intermediate divided body (intermediate portion) 36 Mesh portion 45 Lid body 51 First rear injection port 52 Second rear injection port 53 Front injection port

Claims (6)

[Claims] 1. A bucket body having an opening on one side, and a rear injection port provided on the opposite side of the opening of the bucket body and opening toward the bucket body and the bucket body. A bucket having nozzles each provided with a front jet port opening in the opposite direction; and a pumping unit for pumping water to the nozzle of the bucket to jet the water from the rear jet port and the front jet port. Characteristic sediment removal device. 2. The earth and sand removing device according to claim 1, further comprising a hoisting means for hoisting the bucket with the opening facing upward. 3. The nozzle according to claim 1, wherein the nozzle has two stages of the rear injection port, the positions being displaced from each other on the bucket body side and on the opposite side to the bucket body. Sediment removal device. 4. The bucket body has a tube body, one side of which penetrates the inside of the bucket body and is connected to the nozzle, and the other side of which extends from the opening and is connected to the pressure feeding means. The earth and sand removing device according to any one of claims 1 to 3, wherein a lid that can close the opening is provided so as to be movable along the pipe. 5. The bucket body is dividable into a front end portion on the nozzle side, a rear end portion on the opening portion side, and an intermediate portion between the front end portion and the rear end portion. Item 7. The earth and sand removing device according to any one of items 1 to 4. 6. The earth and sand removing device according to claim 1, wherein the bucket body is provided with a draining mesh portion that communicates the inside and the outside.