JP2500049B2 - Method and apparatus for removing earth and sand from excavators - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for excavating the ground while injecting a liquid material from a rotating shaft, or for agitating and mixing earth and sand and a liquid material in the ground while injecting a liquid material from the rotating shaft. The present invention relates to a method and an apparatus for removing the earth and sand attached to a rotating shaft.

[0002]

2. Description of the Related Art When excavating the ground while jetting a liquid substance from a rotary shaft, or when agitating and mixing earth and sand and a liquid substance in the ground while jetting a liquid substance from the rotary shaft, they adhere to the rotary shaft. If the soil is left as it is, there is a problem that the next excavation and stirring cannot be performed smoothly. That is,
Rotating shafts include those with a bit at the tip, those with a stirrer on the rotating shaft, and those with a bit and stirrer.In both cases, earth and sand are provided on the rotating shaft itself or on the rotating shaft. If the sand and sand adhere to the agitating part and the bit and remain hardened, it will hinder the next excavation and agitation.

Therefore, in the prior art, when the rotary shaft is moved up and down, water is sprayed onto the rotary shaft itself or the stirring part or bit provided on the rotary shaft to spray the rotary shaft itself or the stirring part or bit provided on the rotary shaft. The adhered earth and sand are scraped off. However, in this conventional example, the water flows downward, the proportion of water such as mud and soil cement filled in the holes formed by the rotating shaft becomes too large, and, for example, in the case of a soil cement wall, the quality is However, there is a problem in that

On the other hand, Japanese Patent Publication No. 62-39188, filed by the applicant of the present invention, is known as a scraping device of this type. In this Japanese Examined Patent Publication No. 62-39188, a rotary shaft is vertically movable along a leader, and the rotary shaft is inserted into an annular cylinder provided at the bottom of the reader to prevent the rotary shaft from moving vertically by the annular cylinder. At the same time, an ejection port for ejecting a fluid is opened in the annular cylinder, and water is injected to a portion of the rotary shaft passing through the annular cylinder so that the earth and sand adhering to the rotary shaft is scraped off. . In this conventional example, while there is an advantage that the sediment and water are prevented from scattering in all directions, while spraying water on that portion while confirming the portion where the sediment that the person should blindly drop is confirmed. Compared to the one that scavenges the earth and sand, it is necessary to thoroughly spray the place where the sand is attached and the place where it is not attached to each part of the rotating shaft that passes through the annular cylinder. The number of injection ports is increased compared to the one that is held by hand and a large amount of water is required, and this large amount of water flows downward, and mud or soil is filled in the holes formed by the rotating shaft. If the ratio of water such as cement becomes too large, for example, in the case of a soil cement wall, there is a problem that the quality is further deteriorated and the site environment is deteriorated.

[0005]

In short, in any of the conventional examples, the earth and sand adhering to the rotating shaft is blown off with water, so that the mud soil filled in the hole formed by the rotating shaft is removed. It is inevitable that the ratio of water in water, soil cement, etc. will exceed the design value. Here, it is conceivable that air is sprayed instead of water, but in the case of air, the effect of loosening the earth and sand like water is weak, and the efficiency of removing the earth and sand deteriorates. Therefore, it is conceivable to increase the pressure of the air, but if the pressure of the air is increased, there is a problem that the loosened earth and sand are scattered around.

The present invention has been made in view of the above-mentioned problems of the conventional example, and its object is to inject the liquid material from the rotary shaft while excavating the ground or the soil and the liquid material in the ground. When stirring and mixing objects, the fluid containing soil particles overflowing on the ground can be effectively used to scrape off the earth and sand adhering to the rotating shaft, and the mud or soil cement filled in the holes formed by the rotating shaft. (EN) There is provided a method and a device for removing earth and sand of an excavator, which can efficiently remove the earth and sand without changing the water ratio in the water.

[0007]

In order to solve the problems of the above-mentioned conventional examples and to achieve the object of the present invention, the method of removing earth and sand of an excavator of the present invention is to inject a liquid material from a rotary shaft 1. While excavating the ground 2 or stirring and mixing the soil and liquid in the ground, the fluid 3 containing soil particles overflowing on the ground
Is sprayed onto the rotating shaft 1 on the ground to scavenge the earth and sand adhering to the rotating shaft 1.

Further, when excavating the ground 2 while jetting the liquid matter from the rotary shaft 1 or stirring and mixing the soil and the liquid matter in the ground, the fluid 3 containing the soil particles overflowing on the ground is rotated on the ground. It is also preferable to blow off the soil and sand adhering to the rotating shaft 1 by spraying it onto the rotating shaft 1 and further spray a fluid such as air or water or a mixed fluid of air and water, which is not mixed with soil particles, on the ground.

It is also preferable to add air when spraying the fluid 3 containing soil particles. In addition, the earth and sand scrubbing device of the excavator of the present invention is used for injecting the liquid matter from the rotary shaft 1 while excavating the ground 2 or for mixing the earth and sand and the liquid matter in the ground by stirring and mixing the soil particles overflowing on the ground. A pumping and jetting means 4 for pumping the fluid 3 and spraying the fluid 3 containing the soil particles onto the rotating shaft 1 is provided.

Further, it is preferable to provide a sieving device 5 for sieving and removing large-sized soil particles in the middle of the moving path of the fluid 3 mixed with the soil particles in the pumping jetting means. Further, it is also preferable to provide a solid-liquid separation means 6 such as a cyclone or a sedimentation tank for separating and removing the soil particles from the fluid 3 containing the soil particles, on the way of the moving path of the fluid 3 containing the soil particles in the pumping / injecting means 4. .

Further, the rotary shaft 1 is vertically movable along the reader 7, and the rotary shaft 1 is provided at the lower portion of the reader 7 in an annular cylinder 8.
The rotary shaft 1 is vertically inserted into the annular cylinder 8 to prevent it from moving up and down.
It is also preferable to provide the injection port 10 of. Also, the annular cylinder 8
A plurality of injection ports 10 and 11 are provided inside, and a part of the plurality of injection ports is pumped up and the injection port 10 at the tip of the injection unit 4 is ejected.
It is also preferable to configure the other injection port as the injection port 11 for spraying a fluid not mixed with soil particles such as air or water or a mixed fluid of air and water onto the rotating shaft 1.

Further, a gripping portion 1 for hand-held and jetting to the tip of the fluid movement path in the pumping jetting means 4
It is also preferable to provide 2.

[0013]

According to the method of the present invention having the above-described structure, the soil overflowing when excavating the ground 2 or agitating and mixing the soil and the liquid in the ground while injecting the liquid from the rotary shaft 1 is injected. By spraying the fluid 3 containing particles onto the rotary shaft 1 on the ground, the earth and sand adhered to the rotary shaft 1 directly or to the stirring unit 13 provided on the rotary shaft 1 or the bit 18 provided on the rotary shaft 1 (hereinafter Also in this case, the soil 3 attached to the rotary shaft 1) is removed, and the fluid 3 mixed with the sand used in this case is ejected from the rotary shaft 1 while injecting a liquid substance and excavating the ground 2 or in the ground. When the materials are stirred and mixed, they are recycled and used.Therefore, the ratio of water in the mud or soil cement filled in the holes formed by the rotating shaft is the same as water sprayed off. There are those that can so as not to change. The specific gravity of the fluid 3 mixed with earth and sand is larger than that of water (for example, in the case of soil cement, about 1.
4), the destructive force at the time of eruption becomes large, and it becomes possible to efficiently remove sediment.

Further, as described above, the fluid 3 containing soil particles overflowing on the ground is sprayed onto the rotary shaft 1 on the ground to scavenge the earth and sand adhering to the rotary shaft 1, and further on the ground, air or water is applied to the rotary shaft 1. If a fluid that does not contain soil particles, such as a mixed fluid of air and water, is sprayed, a small amount of water or air or water and air will be generated even if the fluid 3 that contains soil and sand used for flapping off adheres to the rotating shaft 1. It can be cleanly cleaned with a fluid that does not contain soil particles, such as a mixture of.

Further, when air is added and blown when the fluid 3 containing soil particles is blown, the injection pressure can be easily increased and the sand can be efficiently removed.
Further, according to the device of the present invention, when the liquid material is jetted from the rotary shaft 1, when excavating the ground 2 or stirring and mixing the soil and the liquid material in the ground, the fluid 3 containing the soil particles and overflowing above the ground is pumped up. By providing the pumping-injection means 4 for spraying the fluid 3 containing the soil particles onto the rotating shaft 1 on the ground, the fluid 3 containing the soil particles overflowing on the ground can be easily recycled and sprayed onto the rotating shaft 1. It is a thing.

Further, by providing a sieving device 5 for sieving and removing large-sized soil particles in the middle of the moving path of the fluid 3 mixed with the soil particles in the pumping-injecting means 4, the pumping-injecting means 4 is applied to the ground. When the fluid 3 containing overflowing soil particles is pumped up and ejected toward the rotating shaft 1, by removing the soil particles having a large particle size, the subsequent movement path of the fluid 3 is not blocked, Further, even if the ejected fluid 3 containing soil particles falls, the particles having a large particle size are removed, so that the soil particles having a large particle size are regenerated such as mud in the hole formed by the rotary shaft 1 or soil cement. It is designed to prevent subsidence and the formation of "su".

Further, a solid-liquid separating means 6 such as a cyclone or a sedimentation tank for separating and removing the soil particles from the fluid 3 containing the soil particles is provided on the way of the moving path of the fluid 3 containing the soil particles in the pumping jetting means 4. That is, the soil particles can be removed and recovered as solids, which can be discarded as solids, while the liquids can be recycled to use the earth and sand adhering to the rotating shaft 1 for scraping off. Become.

Further, the rotary shaft 1 is vertically movable along the reader 7, and the rotary shaft 1 is provided at the lower portion of the reader 7 in an annular cylinder 8.
The rotary shaft 1 is vertically inserted into the annular cylinder 8 to prevent it from moving up and down.
In the case where the injection port 10 is provided, the fluid 3 mixed with the soil particles recycled in the annular cylinder 8 is jetted to scavenge the earth and sand adhering to the rotary shaft 1, so that the fluid 3 mixed with the soil particles to be recycled or the sludge is removed. It is possible to prevent the earth and sand from scattering around.

A plurality of injection ports 10, 1 are provided in the annular cylinder 8.
1 is provided, and a part of the plurality of jetting ports is used as the jetting port 10 at the tip of the scooping jetting unit 4, and the other jetting port is not mixed with soil particles such as air or water or a mixed fluid of air and water. The injection port 11 for spraying the fluid onto the rotating shaft 1 has a simple structure and removes the earth and sand adhering to the rotating shaft 1 by the fluid 3 containing soil particles overflowing on the ground, and the earth and sand used for the removal. Even if the mixed fluid 3 adheres to the rotating shaft 1, it is possible to provide a device that can be cleaned with a simple configuration using a fluid that does not contain soil particles such as a small amount of water or air or a mixture of water and air.

Further, the gripping portion 1 for hand-held and jetting the fluid to the tip end portion of the fluid moving path in the pumping jetting means 4
When 2 is provided, when the fluid 3 mixed with soil particles overflowing on the ground is recycled and the earth and sand adhering to the rotating shaft 1 is scraped off, the grasping portion 12 is held by hand and the purpose of the rotating shaft 1 is easily set. It will be possible to intensively squirt the area and drop it off.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. 1 to 3 show an embodiment of the present invention. FIG. 1 shows an excavator, and the excavator is provided with a rotary shaft 1 uniaxially or plurally. In the embodiment shown in the accompanying drawings, a multiaxial example is shown. That is, a plurality of rotating shafts 1
The upper end of is attached to the multi-axis device 14, and the rotation of the rotating device 15 is transmitted to the rotary shaft 1 via the multi-axis device 14 so that the rotary shaft 1 rotates. An elevating body 17 including a rotating device 15 and a multi-axis device 14 is vertically movably attached along a reader 7 standing above the front of the crawler crane 16. In the embodiment shown in the accompanying drawings, the rotary shaft 1 is provided with a bit 18 at the lower end of the rotary shaft 1, and agitating blades, screw parts and the like at one or more arbitrary positions in the vertical direction of the rotary shaft 1. A portion 13 is provided, and a cement liquid, a mixed liquid of cement milk and asphalt, a liquid material for consolidation such as a mixture of cement milk with a chemical liquid, or the like is provided at an arbitrary position of the bit 18 or the rotary shaft 1. , Or an injection hole 20 for injecting a liquid material such as a liquid material such as bentonite.

At the lower part of the leader 7, there is provided an annular cylinder 8 through which the rotary shaft 1 is inserted to prevent the rotary shaft 1 from swaying. The annular cylinder 8 is made of metal. Here, if necessary, a plurality of holes 30 are provided in the peripheral portion of the annular cylinder 8 as shown in the accompanying drawings, and a cushioning material 31 such as urethane rubber is fitted into the holes 30 to attach the cushioning material 31 to the annular cylinder 8. A little from the inner surface of the hole 30. The cushioning material 31 is sandwiched between the projecting pieces 32 provided on the outer surface side of the hole 30 and is detachably fixed by a fastener 34 such as a bolt or a nut. Three
4 may be removed and replaced. A plurality of injection ports 10 are provided on the inner surface of the annular cylinder 8 and a hose 38 is connected to the injection port 10. In the embodiment shown in the accompanying drawings, the upper end of the scraper mounting frame 35 is pivotally supported near the mounting base of the annular cylinder 8 to the leader 7, and the lower portion of the scraper mounting frame 35 is made of urethane rubber or the like. A brush 36 made of an elastic material such as a rubber material or a wire is provided in a protruding manner, and both ends of an air cylinder device 37 and a hydraulic cylinder device are rotatably supported by the annular tube 8 and the substantially central portion of the scraper mounting frame. I am doing it.

Reference numeral 21 in the drawing denotes a hose which is connected to the rotary shaft 1 for communication. The hose 21 is connected to a liquid material supply device 22 for supplying a liquid material. In addition, reference numeral 23 in the figure is a suction hose for sucking the fluid 3 mixed with soil particles, which is a mixture of earth and sand and a liquid substance overflowing on the ground, and the fluid mixed with soil particles sucked by the pump 19 from the suction hose 23. Reference numeral 3 is connected to a liquid material supply device 22 via a sieving device 5 provided in the middle of the flow path and a solid-liquid separating means 6 such as a cyclone or a precipitation tank. The liquid material supply device 22 is provided with a tank 24 and pumps 25 and 26, and the fluid 3 mixed with soil particles supplied from the pump 25 is a hose 2
1, is passed through the hollow inside of the rotary shaft 1 to be jetted from the jet hole 20, and the fluid 3 containing soil particles supplied from the pump 26 is supplied to the jet port 10 via the hose 38. And spouts from the spout 10. Therefore, in this embodiment, the suction hose 23, the pump 19, the pump 26, the hose 38, the injection port 10 and the like constitute the scooping injection means 4.

In using the above device, however, the rotating device 15 is rotated to lower the rotating shaft 1 while rotating the rotating shaft 1 through the multi-axis device 14 to excavate the ground 2 and to inject the injection hole 20. A cement liquid, a mixed liquid of cement milk and asphalt, a liquid substance for consolidation such as a mixture of cement milk and a chemical liquid, or a liquid substance such as a liquid substance such as bentonite is sprayed. In the embodiment, the cement-based consolidating liquid material such as cement milk, a mixed liquid of cement milk and asphalt, or a mixture of cement milk and a chemical solution is drilled while being injected, and the cement-based material is stirred by the stirring unit 13. After stirring and mixing the liquid material for consolidating and the excavated soil, columns of soil cement, columns of soil cement, columns of soil cement asphalt, columns of soil cement asphalt, columns of soil cement mixed with chemicals, columns of soil cement mixed with chemicals, etc. Soil cement columns and soil cement columns are formed. When the rotating shaft 1 moves up and down, the rotation of the rotating shaft 1 is prevented by the ring-shaped cylinder 8. In this case, when the agitating portion 13 of the rotating shaft 1 slightly shakes laterally, it is projected to the inner surface of the ring-shaped cylinder 8. The shock absorbing material 31 absorbs the shock and reduces the metallic friction noise.

On the other hand, when the cement-based consolidating liquid material is jetted in the ground while being agitated and mixed by the agitator 13,
Volume expansion due to excavation of earth and sand and injection of cement-based solidifying liquid increases the total volume of the mixture of cement-based solidifying liquid and excavated earth and sand in the excavation hole, increasing cement-based solidification. A part of the fluid 3 containing the soil particles, which is a mixture of the liquid material and the excavated earth and sand, overflows on the ground. The fluid 3 containing the soil particles overflowing on the ground is scooped up by the scooping and spraying means 4 and sprayed from the spray port 10 to scavenge the earth and sand adhering to the rotary shaft 1.
That is, the pump 19 is actuated, and the fluid 3 containing soil particles overflowing on the ground is first sent to the sieving device 5 by the suction hose 23, and in this sieving device 5, a mass of sand, stone, or soil having a diameter of a certain size or more. And the like, and then the solid-liquid separating means 6 such as a cyclone or a sedimentation tank removes the solid content in the fluid 3 containing the soil particles as much as possible, and sends this to the tank 24 of the liquid material supply device 22 for storage. Sand, stones, lumps of soil, etc. with a certain diameter or more that have been sieved by the sieving device 5 and solids separated by the solid-liquid separation means 6 are discarded or reused as aggregates for civil engineering and construction. It is done. On the other hand, the tank 24 of the liquid material supply device 22
The fluid 3 containing the soil particles stored in the tank 3 is sprayed into the ground from the spray holes 20 through the hose 21 through the hollow inside of the rotary shaft 1 by operating the pump 25 again. In addition, by operating the pump 26, the earth and sand that are sprayed from the spray port 10 to the rotary shaft 1 through the hose 38 and adhered to the rotary shaft 1 are blown off. In this case, in the embodiment shown in FIGS. 1 to 3, since the injection port 10 is opened in the annular cylinder 8, the fluid containing soil particles scatters in all directions,
The blown earth and sand are scattered in all directions to prevent the work environment from being deteriorated. Then, the injected fluid containing soil particles flows downward and mixes with the fluid containing soil particles overflowing from the drill hole to the ground by stirring and mixing, and the fluid containing soil particles is sucked up again by the suction hose 23. To be As described above, since the earth and sand adhering to the rotary shaft 1 is scraped off while recycling the fluid containing soil particles overflowing on the ground, the conventional example in which only water is sprayed to scrape off the earth and sand adhering to the rotary shaft 1 In comparison, the proportion of water in the fluid 3 containing soil particles, which is a mixture of the cement-based solidifying liquid and the excavated earth and sand filled in the hole formed by the rotary shaft 1, does not increase, and therefore the underground The strength of the soil-cement-based columns and the soil-cement-based columns formed in the above will not be reduced, and high quality ones can be formed. In addition, the specific gravity of water is 1, whereas the fluid 3 mixed with earth and sand has a larger specific gravity than water (for example, the specific gravity of soil cement is about 1.4). Therefore, at the same injection pressure, The destructive force by jetting is larger in the fluid 3 mixed with earth and sand than in water, and the effect of removing the earth and sand adhering to the rotating shaft 1 is excellent.

In the embodiment shown in the accompanying drawings, another injection port 11 is provided inside the annular cylinder 8 in addition to the injection port 10 for injecting the fluid 3 containing soil particles overflowing on the ground as described above. A hose 40 is connected to the injection port 11 so as to inject a fluid containing no soil particles such as air or water or a mixed fluid of air and water. Therefore, in addition to jetting the fluid 3 containing soil particles from the jet port 10 to scavenge the earth and sand adhering to the rotary shaft 1, the jet port 11
By supplementarily injecting a fluid that does not contain soil particles, such as air or water or a mixed fluid of air and water, even if the fluid 3 containing soil and sand that was used to remove the flakes adheres to the rotating shaft 1, It can be cleaned with a fluid that is not mixed with soil particles, such as water or air, or a mixture of water and air.
In this case, when a fluid such as air or water or a mixed fluid of air and water that does not contain soil particles is supplementarily ejected from the ejection port 11, it may be atomized to be ejected. The position of the injection port 11 is set in the annular cylinder 8 as the injection port 10
It is more preferable to arrange it in the upper position than that.

Further, when the fluid 3 containing the soil particles is sprayed, air may be blown into the hose 38 to spray the fluid 3 containing the soil particles from the injection port 10 onto the rotary shaft 1. When air is blown in this way, the injection pressure is improved and the sand and sand can be removed more effectively. In the embodiment shown in the attached drawings, the brush 3
Since 6 is provided, the brush 36 can further scavenge the earth and sand adhering to the rotary shaft 1. Here, the position of the brush 36 with respect to the rotary shaft 1 can be changed by operating the air cylinder device 37 or the hydraulic cylinder device, and when using the rotary shaft 1 having a different diameter, or when the brush 36 is attached to the stirring unit 13. It is possible to deal with adjusting the hit state. Of course, in the present invention, the brush 36 may not be provided.

In the above-mentioned embodiment, the example in which the injection port 10 is provided in the annular cylinder 8 is shown. However, as shown in FIG. 4, the liquid is drawn by holding it by hand at the tip of the moving path of the fluid in the pumping injection means 4. By providing a gripping portion 12 for this purpose, and by providing the jetting port 10 in this gripping portion 12, the operator holds the gripping portion 12 in his hand and concentrates the fluid 3 containing the soil particles at the intended location of the rotary shaft 1. Alternatively, the earth and sand adhering to the rotary shaft 1 may be sputtered off. When the work is carried out with the gripping portion 12 held in the hand as described above, the spray can be concentrated and sprayed only on the place where the soil is attached, so that the sand can be efficiently scraped off. Also in this embodiment, if necessary, an injection port 11 for injecting a fluid in which soil particles such as air or water or a mixed fluid of air and water is not mixed is provided in the annular cylinder 8 or another place. Alternatively, the injection port 11 may be used together.

Further, the injection port 10 is the annular cylinder 8 as described above.
It is not limited to being provided inside or to be provided with the gripping portion 12 so that the operator can hold it by hand, and it may be provided at another place. Any material may be used as long as it jets a fluid to remove the earth and sand attached to the rotary shaft 1. Note that the tank 24 of the liquid material supply device 22 is partitioned into the pump 25 side and the pump 26 side as shown in FIGS. 5 and 6, and the tank portion 24a on the pump 26 side is filled with a fluid containing soil particles that has entered from the suction hose 23. Is made to flow directly through the sieving device 5 and the solid-liquid separation means 6, and this is supplied to the injection port 10 side from the tank portion 24a by the pump 26, while overflowing from the tank portion 24a to the tank portion 24b on the pump 25 side. A fluid mixed with earth and sand is supplied by another method, or the solid-liquid separation means 6
After that, it is supplied to both the tank parts 24a and 24b, and in the tank part 24b, cement is newly added or water is added to adjust the mixing ratio to be set, and the injection hole 20 is supplied through the pump 25. Alternatively, the mixture may be injected into the soil with a predetermined mixing ratio.

In the above embodiment, the liquid material supply device 22 is composed of the tank 24 and the pumps 25 and 26. However, as shown in FIGS. 7 and 8, the tank 24 and the pump 26 form the liquid material. The supply device 22 may be configured so that the liquid material supply device 22 supplies only the injection port 10 through the hose 38 via the pump 26. In this case, another liquid material supply device (not shown) is connected to the hose 21.
To supply the liquid material.

In each of the above embodiments, cement milk in the ground, a mixed liquid of cement milk and asphalt,
Cement-based solidifying liquid such as a mixture of cement milk with a chemical liquid is jetted to stir and mix the cement-based solidifying liquid and excavated earth and sand, with the cement-based solidifying liquid. Since the mixture with the excavated earth and sand partially overflows above the ground, an example was shown in which this was used as a fluid containing soil particles for the purpose of removing the earth and sand adhering to the rotating shaft 1, but when bentonite was injected into the ground, Since the mixture with earth and sand overflows on the ground, it may be used as a fluid containing earth particles for removing the earth and sand attached to the rotary shaft 1.

In the embodiment shown in the accompanying drawings, the rotary shaft 1
As an example, the bit 18 is provided at the lower end of the rotary shaft 1, and the stirring unit 13 such as a stirring blade or a screw unit is provided at one or more positions at arbitrary positions in the vertical direction of the rotary shaft 1. In the case where only the bit 18 is provided in the portion, when the screw is provided in the rotating shaft 1 in the vertical direction, or when the bit 18 is not provided in the lower end portion of the rotating shaft 1 and only the stirring portion 13 is provided in the rotating shaft 1 ( In this case, it can be used for ground improvement in soft ground).

[0033]

As described above, according to the present invention, when the liquid material is jetted from the rotary shaft while excavating the ground or stirring and mixing the soil and the liquid material in the ground, the soil particles overflowing on the ground are mixed. The above fluid is sprayed onto the rotating shaft on the ground to scavenge the dirt and sand adhering to the rotating shaft, so it is possible to recycle the fluid containing the soil particles overflowing on the ground and effectively use it. The ratio of water in the mud or soil cement that fills the holes formed by the rotating shaft does not change, and as a result, it does not deteriorate the quality of underground structures. Also, since the fluid containing soil and sand has a larger specific gravity than water, there is an advantage that the destructive force at the time of jetting is large and the soil and sand can be efficiently removed.

When the ground material is excavated or the ground material is stirred and mixed with the liquid material while jetting the liquid material from the rotary shaft, the fluid containing the soil particles overflowing on the ground is sprayed on the ground shaft to the rotary shaft. In addition to the above-mentioned effects, it is also useful for removing the adhered earth and sand in addition to the above-mentioned effect in the case of spraying a fluid that does not contain soil particles such as air or water or a mixed fluid of air and water on the rotating shaft on the ground. Even if the soil-mixed fluid adheres to the rotating shaft, it can be cleanly cleaned with a fluid that is not mixed with soil particles such as a small amount of water or air or a mixture of water and air.

Further, when the fluid containing the soil particles is sprayed by adding air to the fluid, the spray pressure can be easily increased to effectively scavenge the earth and sand adhering to the rotary shaft. Also, while ejecting liquid matter from the rotating shaft, when excavating the ground or stirring and mixing soil and liquid matter in the ground, pump up the fluid with soil particles overflowing on the ground and rotate the fluid with soil particles on the ground. When the pumping jetting means for spraying the shaft is provided, the fluid containing the soil particles overflowing on the ground can be easily recycled and sprayed on the rotary shaft with a simple device.

Further, in a device provided with a sieving device for sieving and removing large-sized soil particles in the course of the movement route of the fluid mixed with the soil particles in the pumping injection means, the movement route of the fluid after the sieving device is It does not become clogged, and since the large particle size is removed even if the ejected fluid containing soil particles falls, the soil particles with large particle size are re-formed by the rotating shaft. It is possible to prevent “suds” from forming by sinking in or soil cement, which enables high-quality construction.

Further, in the one in which solid-liquid separation means such as a cyclone or a sedimentation tank for separating and removing soil particles from the fluid containing soil particles is provided in the course of the movement path of the fluid containing soil particles in the pumping jetting means, Soil particles can be removed and collected as solids for disposal such as disposal as solids, while liquids can be recycled and effectively used for scraping off the earth and sand adhering to the rotating shaft. Also, by removing the solid content, clogging of the path can be prevented.

Further, the rotating shaft is vertically movable along the leader, and the rotating shaft is inserted into an annular cylinder provided in the lower part of the reader to prevent the rotating shaft from moving vertically by the annular cylinder. , In the case where the injection port of the pumping injection means is provided in the annular cylinder, in the case where the fluid containing the soil particles mixed in the annular cylinder is injected to scavenge the earth and sand adhering to the rotary shaft, the soil particles mixed with the recycled particles is mixed. There is an advantage that it is possible to prevent the fluid and the loosened earth and sand from scattering around and prevent the working environment from being deteriorated.

Further, a plurality of injection ports are provided in the annular cylinder, and a part of the injection ports is used as the injection port at the tip of the pumping injection means, and the other injection ports are air or water or air and water. In the case of an injection port for spraying a fluid such as a mixed fluid that does not contain soil particles onto the rotating shaft, a simple structure is used to scavenge the earth and sand adhering to the rotating shaft due to the fluid containing the soil particles overflowing on the ground. At the same time, even if the soil-mixed fluid used for scraping off adheres to the rotary shaft, it can be cleaned with a small amount of water or a fluid that is not mixed with soil particles such as air or a mixture of water and air.

Further, in the case where the gripping portion for holding and jetting by hand is provided at the tip of the fluid movement path in the pumping jetting means, the fluid containing soil particles overflowing on the ground is recycled to the rotating shaft. When removing adhered earth and sand, you can hold the grip part in your hand and eject it intensively at the target location of the rotating shaft to remove the earth and sand.
It can effectively remove dirt and sand.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged plan view of an annular cylinder portion of the device used in the above.

FIG. 3 is an enlarged front view of the annular cylinder portion of the above.

FIG. 4 is a sectional view of another embodiment of the present invention.

FIG. 5 is a sectional view of still another embodiment of the present invention.

FIG. 6 is a sectional view of still another embodiment of the present invention.

FIG. 7 is a sectional view of still another embodiment of the present invention.

FIG. 8 is a sectional view of still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating shaft 2 ground 3 fluid containing soil particles 4 pumping injection means 5 sieving device 6 solid-liquid separation means 7 leader 8 annular cylinder 10 injection port 11 injection port 12 gripping part

Claims (9)

(57) [Claims] 1. A fluid containing soil particles overflowing above the ground is sprayed onto the rotating shaft on the ground when excavating the ground while agitating the liquid from the rotating shaft or stirring and mixing the soil and the liquid in the ground. A method for removing earth and sand from an excavator, which comprises removing earth and sand from the shaft. 2. A fluid containing soil particles overflowing above the ground is sprayed onto the rotating shaft on the ground when excavating the ground or stirring and mixing the soil and the liquid into the ground while injecting the liquid from the rotating shaft. A method for removing earth and sand from an excavator, which comprises removing the earth and sand adhering to the shaft, and further spraying a fluid that does not contain earth particles, such as air or water or a mixed fluid of air and water, onto the rotating shaft on the ground. 3. The method for removing earth and sand from an excavator according to claim 1 or 2, characterized in that air is added and sprayed when spraying a fluid containing soil particles. 4. When excavating the ground while injecting a liquid substance from a rotating shaft or stirring and mixing the soil and the liquid substance in the ground, the fluid containing the soil particles overflowing on the ground is pumped up and the fluid containing the soil particles is collected. An earth and sand scrubbing device for an excavator, characterized in that it is provided with a scooping and spraying means for spraying on a rotating shaft on the ground. 5. The excavation according to claim 4, wherein a sieving device for sieving and removing large-sized soil particles is provided in the middle of the moving path of the fluid mixed with the soil particles in the pumping injection means. A device for removing dirt from the machine. 6. A solid-liquid separating means such as a cyclone or a sedimentation tank for separating and removing soil particles from the fluid containing the soil particles is provided in the middle of the moving path of the fluid containing the soil particles in the pumping injection means. The earth and sand removing device for an excavator according to claim 4 or claim 5. 7. A rotation shaft is vertically movable along a leader, and the rotation shaft is inserted into an annular cylinder provided in the lower portion of the reader to prevent the rotation shaft from moving vertically by the annular cylinder. 5. The earth and sand scrubbing device for an excavator according to claim 4, wherein an injection port of the pumping injection means is provided in the annular cylinder. 8. A plurality of injection ports are provided in an annular cylinder, a part of the plurality of injection ports is used as an injection port at the tip of the pumping injection means, and the other injection ports are air or water or air and water. 8. An injection port for spraying a fluid, such as a mixed fluid, in which soil particles are not mixed, onto a rotating shaft.
Debris removal device described. 9. The debris removing device according to claim 4, wherein a gripping portion for holding and ejecting by hand is provided at a tip end portion of a fluid movement path in the pumping and ejecting means.