Sediment water washing device

Abstract

To provide a sediment water-washing device that can repeatedly wash a wider area rather than being confined to a limited range, and to provide a sediment water-washing device that does not require electrical wiring, control, or monitoring functions, and can mechanically move a water gun up, down, left, and right, while being inexpensive and easy to use.SOLUTION: A sediment water-washing device comprises: a water gun 1 that discharges water to wash away ore powder accumulated on a floor surface under a conveyor; and water gun automatic elevation means 4 that automatically tilts the water gun 1 and moves a tip of a nozzle 2 up and down between a lower end position and an upper end position. The water gun automatic elevation means 4 includes a rotating pipe 6 fixed to a mount 5, a torsion spring 10 arranged on one end of a rotating cylinder 9, a water gun fixture 14, drive means 15 for rotating the rotating cylinder 9 within a predetermined angular range based on the same principle as a bamboo water hammer, and components including a stopper 25 and a protrusion 26 for adjusting the lower end position of the tip of the nozzle 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sediment washing device for washing away ore, coal, coke, limestone, etc. that has fallen from a conveyor. [Background technology]

[0002] In steelworks, belt conveyors are widely used to transport raw materials for pig iron production, but due to the structure of rotating endless belts, the ore powder that adheres to the back belt falls and accumulates like a band along the belt on the floor below the belt conveyor. Since the accumulated ore powder can scatter and cause a deterioration of the environment in the factory, it is collected by workers using shovels or small excavators, and then loaded onto trucks and transported to the yard. However, this ore dust processing work requires many workers and is inefficient, so the following technologies have been applied for patent in the past to solve this problem. For example, Patent Document 1 (JP Patent Publication 8-133452 A) describes a method for treating ore falling from a belt conveyor, in which the back belt is reversed at the head side of the belt conveyor, and then the reversed back belt is rotated forward at the tail side of the belt conveyor, while ore falling powder that falls on the floor surface below the reversal area on the head side of the back belt and below the forward rotation area on the tail side is collected in a water collection pit by automatic water washing, and then recovered separately after lump powder separation (see especially claim 1 and Figure 1). In the embodiment, the installation position of the water washing nozzle (30) is usually about 5 m away from the pile-up location of the ore powder (16), and the pressure of the water blown out from the water washing nozzle (30) is 5 kg / cm. 2 (3-6kg / cm 2 It is also described that the floor surface should be inclined downward by several degrees toward the water collection pit (31) to allow for good drainage (see especially paragraph 0013 and Figure 1).

[0003] In addition, in Patent Document 2 (JP Patent Publication 8-165016A), the amount of ore that has fallen from the back belt of a belt conveyor to the floor is determined by an operator observing the pile-up of the ore powder with a camera or by computer image analysis, and the amount of ore that has fallen is calculated as [amount of ore that has fallen (kg) × specific gravity coefficient of ironmaking raw materials × 10 4 ] / [Washing water volume (liters / min) × washing water flow rate (m / sec) 2 The document describes a water-washing method for ore-fall treatment, in which the retention index REI is calculated by substituting the retention index REI into the formula above, and the optimum water-washing time is calculated from the obtained REI using a graph showing the relationship between the REI of the raw materials for iron-making and the optimum water-washing time, which is created empirically for each bed surface angle, and the optimum water-washing pattern and water-washing nozzle (13) are specified based on the time, thereby automatically washing the ore (see particularly claims 1 and 2 and paragraph 0023). In the embodiment, the document describes that the water washing nozzle (13) is attached to the washing water pipe (20) via an electromagnetic valve (21) and that the nozzle direction is directed toward the water collection pit (12), that the floor surface on which the ore powder (22) accumulates may not be inclined or may have an inclination of about 5 to 10 degrees to improve water washability, and that the floor material may be concrete or SUS (see, in particular, paragraph 0015 and Figure 1). Furthermore, Patent Document 3 (JP 2015-16959 A) filed by the applicants describes an automatic roller tilting water washing device that is an apparatus for removing deposits that have fallen from an endless belt conveyor and accumulated on a fallen object receiving plate (7), and that has a hollow roller (14) with a rotating shaft, and the roller (14) is open at the top, and when water is injected and the water level reaches the upper surface of the roller (14), the roller rotates to drain the water and then returns to the position it was in when the water injection began (see particularly the abstract and Figure 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-133452 [Patent Document 2] Japanese Patent Application Publication No. 8-165016 [Patent Document 3] JP 2015-16959 A (Patent No. 6195751 A) Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the belt conveyor ore treatment method described in Patent Document 1, the horizontal and vertical angles of the water washing nozzle (30) are constant and there is no mechanism for adjusting the discharge pressure, so only a limited range of the ore powder (16) can be washed with water. In addition, the floor surface is inclined toward the water collection pit (31), so the range of use is limited when introduced into existing facilities. In the water-washing ore treatment method described in Patent Document 2, it is said that the optimum water-washing time is obtained using a graph (Figure 3) created by empirical rules, but it is not clear what the empirical rules are.In addition, the examples state that automatic water-washing is performed by specifying the opening and closing cycle of the solenoid valve (21) and the optimum water-washing pattern and water-washing nozzle (13) based on the obtained optimum water-washing time (see paragraphs 0020 and 0025), but it is not clear how the opening and closing cycle of the solenoid valve (21) and the optimum water-washing pattern and water-washing nozzle (13) are specified. Furthermore, the automatic roller tilting water washing device described in Patent Document 3 only drains water intermittently using the rollers (14), and therefore requires an inclined falling object receiving plate (7). In order to solve these problems, the first objective of the present invention is to provide a deposit washing device that can repeatedly wash a wider area rather than just a limited area, and the second objective is to provide an inexpensive, easy-to-use deposit washing device that does not require electrical wiring or control / monitoring functions and that has a general-purpose water cannon that can be mechanically moved up / down and left / right. [Means for solving the problem]

[0006] The invention according to claim 1 to solve the above problem is as follows: A sediment washing device that is composed of a water cannon and an automatic water cannon elevation means, and washes away sediments accumulated below a conveyor by spraying water from the water cannon, The water cannon automatic elevation means includes a rotary pipe installed below the conveyor and a drive means for rotating the rotary pipe within a predetermined angle range, The center line of the rotating pipe is perpendicular to a line parallel to the conveying direction of the conveyor and is parallel to a floor surface below the conveyor; The water cannon is fixed to the rotary pipe or a linking member linked to the rotary pipe, The tip of the water cannon rises and falls between a lower end position and an upper end position as the rotating pipe rotates, and a straight line passing through the rear end and the tip of the water cannon intersects with the floor surface between the lower end position and the upper end position.

[0007] The invention according to claim 2 is the deposit washing apparatus according to claim 1, The water cannon is characterized in that it can be swung along a plane parallel to the center line of the rotating pipe.

[0008] The invention according to claim 3 is the deposit washing apparatus according to claim 1 or 2, the driving means includes a tilting water basin fixed to the rotary pipe and having an upper opening, and a make-up water pipe for supplying water to the tilting water basin; The tip of the water cannon is at the lower end position when the tilting water basin is empty, and at the upper end position when the tilting water basin is full of water, The tilting water basin is emptied immediately after being filled with water by draining water from the upper opening, The rotating pipe is characterized in that it is provided with an elastic body that urges the tip of the water cannon in a direction to descend to the lower end position.

[0009] The invention according to claim 4 is the deposit washing apparatus according to claim 3, The driving means is characterized by having a bottom end position adjustment portion that adjusts the bottom end position. Effect of the Invention

[0010] The deposit washing device of the invention according to claim 1 comprises a water cannon and an automatic water cannon elevation means, The water cannon automatic elevation means has a rotating pipe installed below the conveyor and a driving means for rotating the rotating pipe within a predetermined angle range, the center line of the rotating pipe is perpendicular to a line parallel to the conveyor's transport direction and is parallel to the floor surface below the conveyor, The water cannon is fixed to a rotating pipe or an interlocking member that interlocks with the rotating pipe, and the tip of the water cannon rises and falls between a lower end position and an upper end position as the rotating pipe rotates, and a straight line passing through the rear end and tip of the water cannon intersects with the floor surface between the lower end position and the upper end position, so that a wider area can be repeatedly washed with water rather than being limited to a limited area.

[0011] In addition to the above-mentioned effects of the deposit washing device of the invention according to claim 1, the deposit washing device of the invention according to claim 2 has a water cannon that can be swiveled along a plane parallel to the center line of the rotating pipe, and the tip of the water cannon can be rotated back and forth within a predetermined angle range in the left and right directions, so that an even wider area can be repeatedly washed with water.

[0012] The deposit washing device of the invention according to claim 3 has the above-mentioned effects of the deposit washing device of the invention according to claim 1 or 2, and includes a tilting water basin with a drive means fixed to a rotating pipe and an upper opening, a make-up water pipe for supplying water to the tilting water basin, the tip of the water cannon is at the lower end position when the tilting water basin is empty and at the upper end position when the tilting water basin is full, water is discharged from the upper opening of the tilting water basin immediately after the tilting water basin becomes full, and the rotary pipe is provided with an elastic body for biasing the tip of the water cannon in a direction to lower the tip of the water cannon to the lower end position. In other words, the tip of the water cannon can be mechanically raised and lowered without electrical wiring or a control / monitoring function for operating the drive means, and therefore an inexpensive and easy-to-use deposit washing device can be provided.

[0013] In addition to the above-mentioned effects achieved by the deposit washing device of the invention according to claim 3, the deposit washing device of the invention according to claim 4 has a lower end position adjustment section for adjusting the lower end position of the drive means, so that immediately after the tilting water basin becomes full, water is discharged from the upper opening to empty the basin, and the tip of the water cannon can be prevented from moving beyond the lower end position when returning to the lower end position. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a front view of the deposit washing device according to the first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram of the operation of the deposit washing device according to the first embodiment. [Diagram 3] A diagram showing the appearance of a water cannon. [Figure 4] FIG. 11 is an explanatory diagram of the operation of the deposit washing device according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the embodiment of the present invention will be described with reference to examples. EXAMPLES

[0016] FIG. 1 is a front view of a deposit washing device according to a first embodiment. As shown in FIG. 1, the sediment washing device according to the first embodiment is composed of a water cannon 1 which uses water to wash away ore powder (not shown) that has fallen from a belt conveyor and accumulated on the floor below the conveyor, and an automatic water cannon elevation means 4 which automatically elevations the water cannon 1 and raises and lowers the tip of a nozzle 2 between a lower end position and an upper end position. As shown in the lower center of Figure 1, the water cannon 1 consists of a nozzle 2 that sprays relatively high-pressure water toward the floor surface below the conveyor, and a water supply pipe 3 that supplies water to the nozzle 2, and the water pressure in the water supply pipe 3 is usually around 0.5 mPa.

[0017] As shown in FIG. 1, the water cannon automatic elevation means 4 has the following configuration. (A) Stand 5 (width 40 cm, height 50 cm, depth 40 cm) installed on the floor under the conveyor belt. (B) A rotating pipe 6 (length 40 cm) fixed to a stand 5. The rotating pipe 6 is composed of one end holding part 7 and other end holding part 8 which are fixed to the frame 5 so as not to rotate, and a rotating cylinder 9 which is rotatably held between the one end holding part 7 and the other end holding part 8. The central part of the rotating cylinder 9 is a large diameter part 13, and both end parts are small diameter parts (not shown in FIG. 1) which are rotatably held by the one end holding part 7 and the other end holding part 8, and the center line of the rotating cylinder 9 is arranged so as to be perpendicular to a line parallel to the transport direction of the belt conveyor and parallel to the floor surface below the belt conveyor. (C) Torsion spring 10 (diameter 2 cm, length 7.5 cm) arranged on one end side of rotating cylinder 9. One end of the torsion spring 10 is welded to the other end 12 of the spring fixing portion 11, and the spring fixing portion 11 can be fixed to any position around the one-end holding portion 7. The other end of the torsion spring 10 is welded to an end of the large diameter portion 13 of the rotating cylinder 9, and biases the rotating cylinder 9 in a direction returning the rotating cylinder 9 to the reference position (a direction in which the front side of the rotating cylinder 9 moves downward). (D) A water cannon fixing device 14 for fixing the water cannon 1 to the front side of the rotating cylinder 9 with the tip of the nozzle 2 protruding to the front side of the sediment washing device.

[0018] (E) Driving means 15 for rotating the rotating cylinder 9 within a predetermined angle range. The driving means 15 is composed of a one-end link member 16 and an other-end link member 17 which are fixed to the large diameter portion 13 of the rotating cylinder 9 and protrude toward the rear side of the sediment washing device, a tilting water basin 18 (width 26 cm, height 14 cm, depth 19 cm) which is fixed and held to the rear end portions of the one-end link member 16 and the other-end link member 17, and a make-up water piping 20 which supplies water from an upper opening 19 (width 20 cm, depth 15 cm) provided at the top of the tilting water basin 18. The one end link member 16 and the other end link member 17 each have a one end length adjustment portion 21 and an other end length adjustment portion 22 for adjusting their length, and a counterweight 23 is provided on the front side of the tilting water basin 18 for adjusting the angle at which water accumulated in the tilting water basin 18 begins to be discharged, i.e., the angle at which the tilting water basin 18 becomes full. The make-up water piping 20 branches off midway through the water supply pipe 3, with its tip located directly above the upper opening 19, and a valve 24 is provided at its base for adjusting the amount of water supplied. (F) A bottom end position adjustment unit that adjusts the bottom end position of the tip of the nozzle 2. The lower end position adjustment part consists of a stopper 25 which can be fixed at any position around the other end holding part 8 and determines the lower end position of the tip of the nozzle 2, and a protrusion 26 which is provided on the other end holding part 8 side of the rotating cylinder 9 and hits the stopper 25 when the tilting water reservoir 18 rises.

[0019] FIG. 2 is an explanatory diagram of the operation of the deposit washing device according to the first embodiment. The deposit washing device of Example 1 repeats the states of Fig. 2(A) to (C) using the same principle as the deer scare, thereby rotating the rotating cylinder 9 within a specified angle range to elevate and lower the water cannon 1, and cause the tip of the nozzle 2 to reciprocate between the lower end position shown in Fig. 2(A) and the upper end position shown in Fig. 2(C). The detailed description of each state in FIGS. 2(A) to 2(C) is as follows. <State of Fig. 2(A)> This is the state in which the tilting water basin 18 is empty or nearly empty (hereinafter referred to as the "empty state"), and is raised by the biasing force of the torsion spring 10 (in the direction of lowering the front side of the rotating cylinder 9), and the protrusion 26 hits the stopper 25 and stops. In this state, the tip of the nozzle 2 is at the lower end position, so the water discharged from the nozzle 2 washes away the ore powder scattered on the floor surface under the conveyor at the position closest to the stand 5. <The state shown in Fig. 2(B)> Water is supplied from the makeup water pipe 20 through the upper opening 19 to the tilting sump 18, and as the weight of the accumulated water increases, the tilting sump 18 descends against the biasing force of the torsion spring 10, and the one-end link member 16 and the other-end link member 17 become horizontal. In this state, the tip of the nozzle 2 is in the intermediate position, so the water discharged from the nozzle 2 washes away the ore powder scattered a little away from the stand 5 on the floor below the conveyor, and the ore powder washed away by the water discharged from the nozzle 2. <The state of FIG. 2(C)> Water is further supplied from the makeup water pipe 20, and the tilting water basin 18 is full. In this state, the tip of the nozzle 2 is at the upper end position, so the water discharged from the nozzle 2 further washes away the ore powder scattered at a position away from the stand 5 on the floor surface under the conveyor and the ore powder washed away by the water discharged from the nozzle 2. 2(C), the water that had accumulated in tilting basin 18 begins to be discharged from upper opening 19, the moment on the rear side applied to the rotation shaft of rotating cylinder 9 exceeds the moment on the front side, and tilting basin 18 temporarily descends further, causing the accumulated water to flow out from upper opening 19 and becoming empty. Then, the moment on the front side applied to the rotation shaft of rotating cylinder 9 exceeds the moment on the rear side, so tilting basin 18 rises rapidly, and protrusion 26 hits stopper 25, returning to the state of Fig. 2(A).

[0020] FIG. 3 is a diagram showing the appearance of the water cannon 1 used in the deposit washing apparatus according to the first embodiment. Since the water cannon 1 is generally available commercially, detailed description will be omitted, but it moves so as to reciprocate left and right within a prescribed angular range around the center line of the water supply pipe 3 as an axis, and can swing generally along a plane parallel to the center line of the rotary pipe 6. Therefore, the combination of the raising and lowering of the tip of the nozzle 2 by the automatic water cannon elevation means 4 and the reciprocating rotation of the water cannon 1 can greatly expand the water discharge range from the tip of the nozzle 2 compared to conventional sediment washing devices. EXAMPLES

[0021] FIG. 4 is an explanatory diagram of the operation of the deposit washing device according to the second embodiment. The deposit washing apparatus according to the second embodiment is configured such that the automatic water cannon elevation means 4 in the deposit washing apparatus according to the first embodiment is replaced with an automatic water cannon elevation means 34, and has the following configuration. (G) A stand 5 (having the same structure as in Example 1) installed on the floor surface under the belt conveyor. (H) A rotating pipe 6 fixed to a stand 5 (having the same structure as in Example 1, but since the torsion spring 10 and the lower end position adjustment part are not required in Example 2, the length of the small diameter part that is rotatably held relative to the one end side holding part 7 and the other end side holding part 8 may be short). (I) A water cannon fixing device 14 (having the same structure as in the first embodiment) for fixing the water cannon 1 to the front side of the rotating cylinder 9 with the tip of the nozzle 2 protruding to the front side of the sediment washing device. (J) Driving means 35 for rotating the rotating cylinder 9 within a predetermined angle range. As shown in FIG. 4, the driving means 35 is composed of a link member 36 fixed to the rotating cylinder 9 and protruding from the rear side of the sediment washing device, a connecting member 37 rotatably connected to the rear end of the link member 36, and a rod-type hydraulic cylinder 39 that reciprocates a rod 38 rotatably connected to the rear end of the connecting member 37. That is, the main difference between the water cannon automatic elevation means 34 of the second embodiment and the water cannon automatic elevation means 4 of the first embodiment is that the drive means 15 using the tilting water reservoir 18 or the like in the water cannon automatic elevation means 4 of the first embodiment is replaced by a drive means 35 using a rod-type hydraulic cylinder 39 or the like. As for the other components, although the torsion spring 10 and the lower end position adjustment portion (the stopper 25 and the protrusion 26) are not provided, the basic structure is the same as that of the sediment washing device of the first embodiment. Therefore, the components other than the drive means 35 will be described in FIG. 4 using the same numbers as those in FIGS. 1 and 2.

[0022] In the deposit washing device according to the second embodiment, similarly to the deposit washing device according to the first embodiment, the states of Figs. 4(A) to 4(C) are repeated to rotate the rotating cylinder 9 within a predetermined angle range to elevate the water cannon 1, and the tip of the nozzle 2 can be reciprocated between the lower end position shown in Fig. 4(A) and the upper end position shown in Fig. 4(C). The detailed description of each state in FIGS. 4(A) to 4(C) is as follows. <State of FIG. 4(A)> This is the state where the rod 38 has moved to the rearmost side, and the rear end of the link member 36 has risen to the highest position (hereinafter referred to as the "first state"). In the first state, the tip of the nozzle 2 is at the lowest position, so the water discharged from the nozzle 2 sweeps away the ore powder scattered at the position closest to the stand 5 on the floor surface under the conveyor. In the first state, the angle at which the straight line connecting both ends of the link member 36 intersects with the straight line connecting both ends of the connecting member 37 is set to be less than 180 degrees on the upper side. <State of FIG. 4(B)> This is a state in which the rod 38 moves slightly forward due to the operation of the rod-type hydraulic cylinder 39, and the link member 36 is horizontal (hereinafter referred to as the "second state"). In the second state, the tip of the nozzle 2 is in the intermediate position, so the water discharged from the nozzle 2 washes away the ore powder scattered a little away from the stand 5 on the floor surface under the conveyor and the ore powder washed away by the water discharged from the nozzle 2. <State of FIG. 4(C)> This is a state in which the rod 38 moves to the frontmost position by the operation of the rod-type hydraulic cylinder 39, and the rear end of the link member 36 is at the lowest position (hereinafter referred to as the "third state"). In the third state, the tip of the nozzle 2 is at the upper end position, so that the water discharged from the nozzle 2 washes away the ore powder scattered at a position away from the stand 5 on the floor surface under the conveyor and the ore powder washed away by the water discharged from the nozzle 2. Then, after the state shown in Figure 4(C) is reached, when the rod 38 is moved toward the rear side, the rear end of the link member 36 begins to rise, passing through the state shown in Figure 2(B) and returning to the state shown in Figure 2(A). Therefore, in the deposit washing apparatus according to the second embodiment, the elevation of the tip of the nozzle 2 by the automatic water cannon elevation means 34 and the reciprocating rotation of the water cannon 1 are combined, so that the water discharge range from the tip of the nozzle 2 can be significantly expanded as compared with that of the conventional deposit washing apparatus.

[0023] Modifications of the first and second embodiments are listed below. (1) In the first and second embodiments, the washing device for automatically washing the ore powder that has fallen and accumulated from a belt conveyor has been described, but it can also be used as a washing device for deposits that have fallen and accumulated from conveyers such as chain conveyers and roller conveyers, in addition to the ore powder that has fallen and accumulated from a belt conveyor. The dimensions shown in the description of the first embodiment need to be changed as appropriate depending on the type and size of the conveyor. (2) In the first and second embodiments, a commercially available water cannon that can swivel left and right is used as the water cannon 1. However, when applied to a floor surface under a narrow conveyor, a commercially available water cannon that cannot swivel may be used. (3) In the first and second embodiments, the water cannon 1 is directly fixed to the front side of the rotating cylinder 9. However, the water cannon 1 may be fixed to an interlocking member that extends forward or vertically from the rotating cylinder 9 and interlocks with the rotating cylinder 9.

[0024] (4) In Example 1, the angle at which water accumulated in the tilting water basin 18 begins to be discharged is determined by the biasing force of the torsion spring 10, the length of the one end link member 16 and the other end link member 17, and the weight of the counterweight 23. However, since the biasing force of the torsion spring 10, the length of the one end link member 16 and the other end link member 17, and the weight of the counterweight 23 can all be adjusted, it is possible to provide only one or two of these. However, if only one end link member 16 and / or the other end link member 17 whose length can be adjusted, or only a counterweight 23 whose weight can be adjusted, is provided, it is difficult to balance the weight between the water cannon 1 on the front side of the rotating cylinder 9 and the tilting water basin 18 on the back side, and it is not easy to adjust the speed at which the tilting water basin 18 is raised and returned to the state of Figure 2(A) after the accumulated water flows out of the upper opening 19, so it is better to provide a torsion spring 10. In addition, since the biasing force of the torsion spring 10 is difficult to change, it is better to provide, together with the torsion spring 10, either one end side link member 16 and the other end side link member 17 whose length can be adjusted, or a counterweight 23 whose weight can be adjusted. (5) In the first embodiment, the torsion spring 10 is used to bias the front side of the rotating cylinder 9 in a downward direction. However, a string-like elastic body wrapped around the rotating cylinder 9 or an elastic body fixed to the tip of a rod-like body extending in the front-rear or up-down direction from the rotating cylinder 9 may be connected to an appropriate location of the stand 5 to bias the front side of the rotating cylinder 9 in a downward direction. (6) In the first embodiment, water is supplied to the tilting basin 18 through the upper opening 19. However, the makeup water piping 20 may be a flexible pipe and the makeup water piping 20 may be directly connected to the tilting basin 18 to supply water.

[0025] (7) In the second embodiment, the driving means 35 is constituted by a rod-type hydraulic cylinder 39 having a link member 36, a connecting member 37, and a rod 38. However, as long as the driving means can rotate the rotating cylinder 9 within a predetermined angular range, a motor that acts directly or indirectly on the rotating cylinder 9 and can control the rotation direction and rotation speed may be used. The mechanism for reciprocating the rod 38 is not limited to the rod-type hydraulic cylinder 39, and a mechanism for converting rotary motion into reciprocating motion may be used. Furthermore, when using such a conversion mechanism, it is better to use a water motor that obtains rotary motion by the water flow caused by the water supply to the water supply pipe 3, since this eliminates the need for electrical wiring and control / monitoring functions, as in the first embodiment. [Explanation of symbols]

[0026] 1 Water cannon 2 Nozzle 3 Water supply pipe 4 Water cannon automatic elevation means 5 stand 6 rotating pipe 7 one end holding part 8 other end holding part 9 Rotating cylinder 10 Torsion spring 11 Spring fixing portion 12: other end side of spring fixing portion 11; 13: large diameter portion; 14: water cannon fixing device 15 Drive means 16 One end side link member 17 Other end side link member 18 Tilting water reservoir 19 Top opening 20 Make-up water piping 21: one end length adjustment portion; 22: other end length adjustment portion; 23: counterweight 24 Valve 25 Stopper 26 Protrusion 34 Water cannon automatic elevation means 35 Driving means 36 Link member 37 connecting member 38 rod 39 rod type hydraulic cylinder

Claims

1. A sediment washing device that is composed of a water cannon and an automatic water cannon elevation means, and washes away sediments accumulated below a conveyor by spraying water from the water cannon, The water cannon automatic elevation means includes a rotary pipe installed below the conveyor and a drive means for rotating the rotary pipe within a predetermined angle range, The center line of the rotating pipe is perpendicular to a line parallel to the conveying direction of the conveyor and is parallel to a floor surface below the conveyor; The water cannon is fixed to the rotary pipe or a linking member linked to the rotary pipe, The tip of the water cannon rises and falls between a lower end position and an upper end position as the rotary pipe rotates, and a straight line passing through the rear end and the tip of the water cannon intersects with the floor surface between the lower end position and the upper end position. A deposit washing apparatus comprising:

2. The water cannon is oscillating along a plane parallel to the center line of the rotating pipe.

2. The deposit washing apparatus according to claim 1 .

3. the driving means includes a tilting water basin fixed to the rotary pipe and having an upper opening, and a make-up water pipe for supplying water to the tilting water basin; The tip of the water cannon is at the lower end position when the tilting water basin is empty, and at the upper end position when the tilting water basin is full of water, The tilting water basin is emptied immediately after being filled with water by draining water from the upper opening, The rotating pipe is provided with an elastic body that biases the tip of the water cannon in a direction to lower the tip to the lower end position.

3. The deposit washing apparatus according to claim 1 or 2.

4. The driving means has a bottom end position adjustment portion that adjusts the bottom end position.

4. The deposit washing apparatus according to claim 3.

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