KR101858053B1 - Excavation apparatus type of in-shaft for dredged soil - Google Patents

Abstract

The present invention relates to a suction apparatus to suck disposable poor soil, such as construction sludge, dredged soil, slime, bottom soil of a sea, streams, and rivers, etc., containing a lot of moisture and organic matters, and, more specifically, relates to an in-shaft type excavating and dredging apparatus including a lifting/lowering suction member capable of being lifted/lowered inside a hollow of a housing, having a suction hole formed in a lower part of the lifting/lowering suction member, and having a discharge hole formed in an upper part, so as to lift or lower the lifting/lowering suction member in the housing when foreign matters, such as waste, a wire, etc., are attached or wound on the suction hole, thereby removing the foreign matters. Moreover, the lifting/lowering suction member having the suction hole formed therein is lifted/lowered inside the hollow of the housing, thus removing the foreign matters blocking the suction hole during a dredged soil suction process while being lifted/lowered in the housing. As a result, provided are effects of removing a worker′s manual work of removing the foreign matters and not stopping a dredged soil removing work in order to remove the foreign matters even if the foreign matters are stuck around the suction hole of the excavating and dredging apparatus.

Description

[0001] The present invention relates to an in-shaft dredged soil dredging apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging and dredging apparatus for absorbing a waste disposal soil containing a large amount of water and organic matter such as construction sludge, dredged soil, slime, or bottom soil of contaminated sea, river, A suction port is formed in a lower portion of the lifting and lowering suction member and a discharge port is formed in an upper portion of the lifting and lowering suction member. When the foreign substance such as waste or wire is attached or wound on the suction port, Shaft type excavation dredging apparatus which can remove foreign matter by moving up or down.

In the modern society, there has been a great deal of waste disposal soil such as the development of the industry and the secondarily generated sludge of construction sludge, dredged soil, slime and contaminated river and river, and various treatment methods have been developed .

In the conventional method for removing the waste disadvantageous soil described above, since the conventional method in which water is blown by using a pump, artificially collecting the sludge on the bottom, and then supplying water again is used, the operation is troublesome and inefficient Not only was the removal of sludge not effective, but there was also a problem with his treatment.

In recent years, in order to solve the problem of the above conventional method, there is proposed a method of sucking and removing a waste disposal soil using a suction pump after inserting a suction pipe into a portion where a poor waste soil is deposited, .

In addition, a number of conventional techniques related to an apparatus for sucking waste disposable soil have been proposed, and the following are representative prior arts related thereto.

Korean Patent Laid-Open Publication No. 10-2014-0070125 relates to a suction apparatus for underwater sediments, and includes a suction pipe body having a hollow formed therein so as to suck sediment from the underwater floor. A sleeve installed in the suction pipe body so as to be slidable along the longitudinal direction and having a through hole through which the sediment sucked through the inlet of the suction pipe body can pass; Wherein the suction pipe body has an air inlet portion in which air supplied from the air supply portion flows in front and rear directions of the air inlet portion, And the sleeve is moved forward and backward by the actuator so that the front end or the rear end of the sleeve contacts the inner surface of the first and second inclined portions to guide the moving direction of the air, Respectively.

In addition, the above-mentioned prior art has the effect of easily controlling the moving direction of the air flowing into the suction pipe so that the suction operation of the sediments can be facilitated by sucking or discharging the sediment with the suction pipe. However, There is a problem in that the operation must be stopped in order to remove the foreign matter. Therefore, there is a need for continuous research and development for solving the problem.

Korean Patent Publication No. 10-2014-0070125 (June 10, 2014) Korean Registered Patent No. 10-0597989 (June 30, 2006) Korean Registered Patent No. 10-0808243 (Feb. 21, 2008) Korean Patent Publication No. 10-2011-0053099 (May 19, 2011)

The present invention has been made in order to solve the problems of the prior art related to the excavating dredging apparatus. In the conventional excavating dredging apparatus, the dredged soil is merely engaged with the operating equipment such as an excavator and sucked through the suction port , And when the foreign object is caught in the vicinity of the suction port, the suction port is easily clogged;

When the foreign material is caught around the suction port of the digging dredging device, the operator has to manually remove the foreign matter;

Even when a cutter is provided in an excavating dredging apparatus, there is a problem that a work should be temporarily stopped when removing foreign matter with a cutter, and a main object thereof is to provide a solution to this problem.

The present invention has been made to solve the above-

A housing having one side joined to the operating device and having a hollow having a length in the vertical direction and a side opening formed with a discharge port communicating with the hollow and the outside; And a lifting and lowering member capable of lifting and lowering in a hollow interior of the housing and having a suction port formed at a lower side and a discharge port communicating with the suction port at an upper side, Shaft type excavating dredging apparatus in which the suction port is located at the lower portion of the housing and is open, and the discharge port is configured to communicate with the discharge port of the housing.

In the in-shaft type digging dredging apparatus according to the present invention as described above, since the lifting and lowering suction member having the suction port is movable upward and downward in the hollow of the housing, the foreign substances closing the suction port during the dredging suction process are lifted and removed from the housing The effect can be obtained;

As a result, even if foreign matter is caught in the vicinity of the suction port or the suction port of the excavation dredger, the operator does not have to manually remove the foreign matter;

The effect of eliminating the dredged soil removing operation for removing the foreign matter can be obtained.

1 is a perspective view showing an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention.
2 is an exploded perspective view showing an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention;
3 is a side view showing an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention.
4 is a plan view showing an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention.
5 is a bottom plan view of an in-shaft excavation dredging apparatus according to a preferred embodiment of the present invention.
6 is a schematic diagram showing dredged soil flow in an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention.
7 is a side view showing a state in which the lifting and lowering suction member of the in-shaft type digging dredging apparatus according to the preferred embodiment of the present invention is lifted and lowered.
8 and 9 are schematic views showing a dredged soil flow in a divided suction pipe of an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention.
10 is a side view showing a state in which an in-shaft type excavation dredging apparatus according to a preferred embodiment of the present invention is mounted on an operating equipment;

The present invention relates to a digging and dredging apparatus for sucking a waste disposable soil (hereinafter referred to as "dredged soil") containing a large amount of water and organic matter such as construction sludge, dredged soil, slime, or bottom soil of contaminated sea, A housing 10, one side of which is fastened to the operating device 40, a hollow having a length in the vertical direction, and a discharge port 12 communicating with the hollow and the outside is formed on the side; A lifting suction member 20 having a suction port 21a formed at a lower side and a discharge port 21b communicating with the suction port 21a is formed at a lower side of the housing 10, And when the lifting and lowering member 20 is lowered from the housing 10, the suction port 21a is located at the lower portion of the housing 10 and is open, and the discharge port 21b is in contact with the housing 10, Shaft type excavating dredging device configured to communicate with the discharge port (12) of the dredger (10).

First, the in-shaft type digging dredging apparatus according to the present invention is characterized in that one side of the housing 10 is fastened to the end of an arm of an operating device 40 such as an excavator, It enters the inside of the dredged soil. At this time, if the operation equipment 40 can control the movement of the excavating and dredging device, it can be composed of various kinds of devices, and the suction hose or the suction pipe itself can be the operation equipment 40.

Further, the suction force applied to the excavating dredge device may be provided by a suction pump additionally mounted to the operation equipment 40, and a separate suction pump may be provided to provide a suction force. It will be apparent that the connection between the excavating dredge device and the suction pump can be realized through the suction hose or the suction pipe.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

Specifically, the housing 10 is formed with a hollow having a length in the vertical direction, one side of which is fastened to the operation equipment 40, and a discharge port 12 through which the hollow and the outside are communicated, Thereby supporting the following lifting / lowering member (20).

That is, one side of the housing 10 fastened to the actuating device 40 is smoothly fastened to the arm of the actuating device 40. At this time, a connecting rod 13 for fastening the housing 10 and the operating device 40 to each other is provided at one side of the housing 10 so that the housing 10 is vertically or horizontally inclined according to the operation of the operating device 40 And one or more connection holes 13a can be formed in the connection block 13 so as to be connected to a connection shaft (not shown) provided at the end of the arm of the operation device 40 .

Further, the hollow formed in the housing 10 has a length in the vertical direction as shown in FIG. 2, so that the up-and-down sucking member 20 can move up and down in a state of being embedded in the hollow. At this time, it is preferable that the hollow shape and inner diameter are configured so as to be as close as possible to the outer shape and inner diameter of the lifting and lowering member 20, so that the lifting and lowering member 20 is not shaken while moving up and down while being in the hollow.

The hollow 12 of the discharge port 12 is connected to the lifting and lowering suction member 20 in accordance with the up-and-down movement of the up-and-down suction member 20, and the discharge port 12 formed in the side of the housing 10 communicates with the hollow. The discharge port 21b is blocked in a state where the discharge port 21b is in contact with a predetermined portion of the outer surface of the discharge port 21b or in contact with a certain portion of the outer surface of the lifting and lowering member 20, Dredged soil is transported.

Further, the suction hose connected to the suction pump or the dredged soil to which one end of the suction pipe is connected is transferred to the suction hose or the suction pipe on the outer side of the discharge port 12. The outer side of the discharge port 12 may have a flange as shown in FIG. 2 and may be coupled with a flange provided at one end of the suction hose or the suction pipe.

The discharge port 12 is formed in an upper portion of the side portion of the housing 10 so as to be communicated with the discharge port 21b when the lifting and lowering member 20 is lowered. The suction port 21a corresponds to the lower portion of the side portion of the housing 10 where the discharge port 12 is not formed and the suction port 21a is connected to the lower portion May be configured to have a closed state. A detailed explanation will be given below.

In addition, the lifting and lowering member 20 is movable upward and downward in the hollow of the housing 10 and has a suction port 21a formed at a lower side and a discharge port 21b communicating with the suction port 21a at an upper side, Shaft type in that it reciprocates linearly in a direction perpendicular to the hollow of the housing 10 so that the dredged soil is sucked through the suction port 21a and is discharged to the discharge port 21b Respectively.

At this time, the lifting and lowering member 20 is moved up and down in the hollow interior of the housing 10 to adjust the suction of the dredged soil by opening or closing the suction port 21a or opening and closing the discharge port 21b, It is possible to realize the effect of removing foreign substances.

That is, the lifting and lowering member 20 has a predetermined length in the vertical direction as shown in Figs. 2 and 3, and is inserted into the hollow of the housing 10. At this time, the length of the lifting and lowering member 20 is longer than the height of the housing 10, and a suction port 21a capable of sucking dredged soil is formed in a lower portion of the side portion do.

4 and 5, the suction port 21a is formed on the outer periphery of the side-lower portion of the cylindrical lifting suction member 20 to suck dredged soil in various directions It is preferable to be constructed so as to be able to do so.

In addition, the suction port 21a may be formed as a single unit having a predetermined inner diameter, and a plurality of the through holes 21a-1 may be combined to form the suction port 21a. The inner diameter of the through-hole 21a-1 is smaller than that of the case where the inlet 21a is formed of a single one, and the other through-hole 21a-1 adjacent to the one through- Spaced apart from each other.

The discharge port 21b is formed in a lower portion of the side portion of the lifting and lowering member 20 and discharges the dredged dust sucked through the suction port 21a. So that the dredged soil transferred from the lifting and suction member 20 is discharged to the outside.

At this time, it is obvious that the discharge port 21b communicates with the suction port 21a. As shown in FIG. 2, a vertical hole is formed in the vertical suction member 20, and a suction port 21a is formed in the hollow lower side , And a discharge port (21b) is formed on the upper side of the hollow.

In addition, the discharge port 21b may be formed in a rectangular shape having a long length in the vertical direction to improve the communication with the suction port 21a.

It is preferable that the suction port 21a and the discharge port 21b are configured to be opened or closed according to the ascending and descending movement of the lifting and lowering member 20 relative to the housing 10. [

6, when the lifting and lowering member 20 is lowered from the housing 10, the suction port 21a is located at the lower portion of the housing 10 and is open, and the discharge port 21b is connected to the housing 10 10, but is in an open state in communication with the discharge port 12. At this time, the dredged soil can be sucked through the suction port 21a and the sucked dredged soil can be discharged to the discharge port 12 through the discharge port 21b.

7, when the lifting and lowering member 20 is lifted and lowered from the housing 10, the suction port 21a is inserted into the hollow of the housing 10 but is in contact with the hollow inner surface of the housing 10 The discharge port 21b is located at the upper portion of the housing 10 and has an open state. At this time, since the lower certain portion of the lifting and lowering member 20 having the suction port 21a is housed in the hollow interior of the housing 10, the waste collected in the periphery of the suction port 21a and blocking the suction port 21a, Such as a wire (rope, electric wire) or the like, which hangs on the lower portion of the housing 20 and clogs the suction port 21a, is caught by the lower end of the housing 10 and removed.

When the lifting and lowering member 20 is raised or lowered from the housing 10 and the discharge port 21b is not in communication with the discharge port 12, the discharge port 12 is blocked by the outer surface of the lifting and lowering member 20 It is realized that the suction hose or the dredged soil inherent in the suction pipe is prevented from flowing back to the discharge port 12 and re-flowing into the discharge port 21b.

In addition, the lower portion of the lifting and lowering member 20 may be configured such that the central portion of the lower end thereof protrudes downward as shown in FIG. 6, so that the lifting and lowering member 20 can be more easily drawn into the dredged soil to be sucked, .

The elevating and lowering suction member 20 may be formed as a single body and can move up and down in the hollow interior of the housing 10. However, as shown in FIGS. 7 and 8, a plurality of divided suction pipes 20a and 20b And the divided suction pipes 20a and 20b are configured such that the suction port 21a and the discharge port 21b are formed respectively so that the one suction face 20a and the other suction face 20b are in contact with each other, And can be configured to be slidable.

Specifically, the divided suction pipes 20a and 20b are inserted into the hollow of the housing 10 and have the same outer circumference as the case where the lift suction member 20 is formed as a single body in the state where the divided suction pipes 20a and 20b are coupled to each other. ) Can be configured in various numbers according to the judgment of a person skilled in the art. In addition, the suction port 21a and the discharge port 21b formed in the respective divided suction pipes 20a and 20b individually perform suction and discharge of the dredged soil.

At this time, one of the divided suction pipes 20a and the other divided suction pipes 20b are mutually slidable with respect to one another. 7 and 8, the lift suction member 20 is configured to have a circular cross-section in the horizontal section, and the split suction pipes 20a and 20b are formed in pairs so that the horizontal cross- The divided suction pipes 20a and 20b can be configured to be slidable in the vertical direction with respect to each other based on a flat surface.

A sliding groove 23 having a length in the vertical direction and a sliding block 24 are alternately formed on one surface of each of the divided suction pipes 20a and 20b so as to prevent the separation between the two divided suction pipes 20a and 20b And the sliding groove 23 and the sliding block 24 are coupled to each other so that the two divided suction pipes 20a and 20b are mutually supported in a vertical direction and can be stably slidable.

In connection with the above, it will be apparent that the above embodiment in which the divided suction pipes are composed of two divided suction pipes can be applied even when the divided suction pipes are composed of three or more.

In addition, the divided suction pipes 20a and 20b may be closed so that the dredged materials transferred from the respective suction ports 21a to the discharge port 21b are isolated from each other and transferred. That is, each of the divided suction pipes 20a and 20b may be in communication with each other, but the dredged dust sucked in the suction port 21a of each of the divided suction pipes 20a and 20b may be transferred only to the respective discharge ports 21b. It is possible to realize the effect of treating the dredged soil using only one or more of the suction port 21a and the discharge port 21b as necessary.

When the lifting and lowering member 20 is constituted by a pair of divided suction pipes 20a and 20b having a semicircular section in the horizontal section as described above, The corners formed by the corners are formed so as to function as a cutter 22.

That is, in general, when suctioning dredged soil using an excavating dredging apparatus, the suction force formed on the suction port causes not only dredged soil but also foreign substances such as waste or wire contained in the dredged soil to be sucked in the direction of the suction port. As a result, There is a problem that the suction pipe, which is clogged or formed with the suction port, is wrapped around the foreign substance and interferes with suction of the dredged material.

On the other hand, the corners formed in the vertical direction on both sides of the pair of divided suction pipes 20a and 20b form a sharp angle with respect to the outer peripheral faces of the divided suction pipes 20a and 20b and one of the divided suction pipes 20a is connected to the housing 10, the two corners of the other divided suction pipe 20b serve as the cutter 22, so that it is possible to cut and remove the foreign substances adhered to the lower portion of the lift and suction member 20 or wound.

At this time, a separate cutter (not shown) may be vertically installed on the corner formed vertically on one side of each of the divided suction pipes 20a and 20b.

Further, the lifting / lowering member 20 may be configured in various forms as long as it can move upward and downward while being in the hollow of the housing 10, more preferably, the lower portion is fastened to the housing 10, And can be moved up and down by one or more lifting cylinders (30) fastened to the suction member (20).

At this time, the lifting cylinder 30 is composed of a cylinder 31 and a cylinder rod 32. The lower part of the cylinder 31 is fastened to the housing 10, and the upper part of the cylinder rod 32 is connected to the lifting / 20). The pneumatic or hydraulic pressures acting on the lifting cylinder 30 can be supplied by the operating equipment 40 and a plurality of lifting cylinders 30 can be lifted and lowered in accordance with the size and shape of the lifting and lowering member 20, And the elevating and lowering suction member 20 can be raised or lowered.

When the elevating and lowering suction member 20 is assembled into a plurality of divided suction pipes 20a and 20b to constitute a single suction device 20, the respective divided suction pipes 20a and 20b are provided with one or more elevating cylinders 30 Can be mounted so that the divided suction pipes 20a and 20b can move up and down simultaneously or individually.

The upper portion of the lifting and lowering cylinder 30 may be fastened to the upper portion of the lifting and lowering member 20 and the upper portion of the lifting and lowering cylinder 30 may be fastened to the cylinder connecting portion 25 .

That is, since the cylinder connecting rod 25 protrudes laterally from the lifting and lowering member 20, the upper portion of the lifting cylinder 30 and the upper portion of the lifting and lowering member 20 can be fastened without interference The elevating cylinder 30 can be equally mounted on a plurality of portions of the lifting and lowering member 20 and the lifting and lowering force by the lifting and lowering cylinder 30 can be increased The effect of being able to be transmitted to the lifting and lowering member 20 stably is realized.

The following is a preferred embodiment of processing the dredged soil using the excavating dredging apparatus according to the present invention.

10, a connecting shaft provided at an arm end of an excavator is coupled to a connecting hole 13a of a connecting rod 13 provided at one side of the housing 10 of the excavating dredger, It can be freely tilted in the vertical or horizontal direction according to the adjustment of the excavator arm.

A pair of outlets 12 are formed at positions symmetrical to each other on the upper side of the housing 10 and the outlets 12 are connected to the end of a suction hose connected to the suction pump to provide a suction force.

The lifting and lowering member 20 in the hollow of the housing 10 is formed of a pair having a semicircular shape in the horizontal section. The overall shape of the lifting and lowering member 20 is a cylindrical shape in which the upper and lower portions are hermetically sealed.

Specifically, when the lifting / lowering member 20 descends from the housing 10 and the suction port 21a is exposed to the lower portion of the housing 10, the operator adjusts the excavator to bring it into the sediment (dredged soil) When the suction pump is operated, the sediment is drawn into the inside of the ascent / descent member 20 through the suction port 21a through the suction port 21a.

Thereafter, the sediment is conveyed in the direction of the discharge port 21b, and is discharged through the discharge port 12 of the housing 10 communicated with the discharge port 21b and flows into the suction hose.

At this time, each of the discharge ports 21b of the pair of divided suction pipes 20a, 20b constituting the lifting and lowering member 20 is in communication with each discharge port 12 of the housing 10, and the divided suction pipes 20a, 20b are mutually closed so that the sediments conveyed to the divided suction pipes 20a, 20b are not mixed with each other.

Thereafter, when foreign substances such as waste or wire are caught or wound around the lower portions of the divided suction pipes 20a, 20b around the suction pipes formed in the divided suction pipes 20a, 20b, the operator operates the elevating cylinder 30 to open the pair of divided suction pipes 20a, (20a, 20b) upward to the upper side of the housing (10), or only one of the divided suction pipes (20a) is raised above the housing (10) to remove foreign matter.

At this time, when the pair of divided suction pipes 20a and 20b are all lifted up, the foreign matter caught or wound around the divided suction pipes 20a and 20b is supported at the lower end of the housing 10 and the divided suction pipes 20a and 20b The foreign matter caught or wound on the lower part of the divided suction pipes 20a and 20b is supported at the lower end of the housing 10 while the other divided suction pipes 20b Are cut and removed by the edges formed on both sides of one side.

In addition, when only one of the divided suction pipes 20a of the pair of divided suction pipes 20a and 20b is lifted, the other divided suction pipes 20b can continuously carry out the sediment suction process.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10: housing 12: outlet
13: connecting rod 13a: connecting hole
20: lifting suction member 20a, 20b: divided suction pipe
21a: inlet 21a-1: through hole
21b: discharge port 22: cutter
23: Sliding groove 24: Sliding block
25: cylinder connecting rod 30: lifting cylinder
31: cylinder 32: cylinder rod
40: Operation equipment

Claims (7)

delete A housing 10 having one side thereof coupled with the operating device 40 and formed with a hollow having a length in the vertical direction and having a discharge port 12 communicating with the hollow and the outside at a side thereof;
A lifting suction member 20 having a suction port 21a formed at a lower side and a discharge port 21b communicating with the suction port 21a is formed at a lower side of the housing 10, ; ≪ / RTI >
When the lifting and lowering member 20 descends from the housing 10, the suction port 21a is located at the lower portion of the housing 10 and is open, and the discharge port 21b is connected to the discharge port 12 of the housing 10 , ≪ / RTI >
The suction port (21a)
Characterized in that the plurality of through holes (21a-1) are assembled to form an inlet (21a).
A housing 10 having one side thereof coupled with the operating device 40 and formed with a hollow having a length in the vertical direction and having a discharge port 12 communicating with the hollow and the outside at a side thereof;
A lifting suction member 20 having a suction port 21a formed at a lower side and a discharge port 21b communicating with the suction port 21a is formed at a lower side of the housing 10, ; ≪ / RTI >
When the lifting and lowering member 20 descends from the housing 10, the suction port 21a is located at the lower portion of the housing 10 and is open, and the discharge port 21b is connected to the discharge port 12 of the housing 10 , ≪ / RTI >
The lifting and lowering member (20)
A plurality of divided suction pipes 20a and 20b divided in a vertical direction are assembled to form a single suction member 20,
The in-shaft type excavating dredging apparatus according to claim 1, wherein the split suction pipes (20a, 20b) are formed to have a suction port (21a) and a discharge port (21b), respectively, and are slidable in a vertical direction.
The method of claim 3,
The lifting and lowering member (20)
The horizontal cross section is circular, and the divided suction pipes 20a and 20b are formed as a pair having a semicircular shape in horizontal section,
Wherein the corners formed in the vertical direction on both sides of the mutually contacting surfaces of the divided suction pipes (20a, 20b) are formed to be angular so as to act as cutters (22).
The method of claim 3,
The divided suction pipes 20a,
And the dredged soil conveyed from each of the suction ports (21a) to the discharge port (21b) is separated and transferred from each other.
A housing 10 having one side thereof coupled with the operating device 40 and formed with a hollow having a length in the vertical direction and having a discharge port 12 communicating with the hollow and the outside at a side thereof;
A lifting suction member 20 having a suction port 21a formed at a lower side and a discharge port 21b communicating with the suction port 21a is formed at a lower side of the housing 10, ; ≪ / RTI >
When the lifting and lowering member 20 descends from the housing 10, the suction port 21a is located at the lower portion of the housing 10 and is open, and the discharge port 21b is connected to the discharge port 12 of the housing 10 , ≪ / RTI >
The lifting and lowering member (20)
Shaft type excavating dredging apparatus according to any one of claims 1 to 3, wherein the lower portion is fastened to the housing (10) and the upper portion is movable up and down by at least one lifting cylinder (30) fastened to the lifting and lowering member (20).
The method according to claim 6,
Above the lifting and lowering member 20,
Shaft type digging dredging apparatus according to claim 1 or 2, wherein a cylinder connecting rod (25) protruding sideways is provided, and an upper portion of the elevating cylinder (30) is fastened to the cylinder connecting rod (25).

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