JPS63119812A - Sand lifting machine - Google Patents

Abstract

PURPOSE:To cover a large-area basin with a small-capacity screw conveyor by hanging down the liftable screw conveyor and sand lifting machine into a carriage traveling on the rail provided above the screw troughs in plural rows. CONSTITUTION:Plural screw troughs (V-shaped ditch) 2 are provided almost in parallel on the bottom of a sand settling basin, and the rail 12 is furnished on the screw troughs 2 almost orthogonally to the trough. The screw conveyor 15 and the sand lifting machine 10 provided on the end of the conveyor for carrying out earth and sand to the outside from the basin are hung down into the carriage 13 traveling on the rail 12, and made freely liftable. As a result, the screw trough 2 can be shallowed and narrowed, even the small-capacity screw conveyor 15 can be used, and the construction working load can be reduced. Moreover, the overload due to the embedment of the conveyor in soil can be prevented even when the amt. of earth and sand is increased, since the conveyor is liftable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sand pumping device for transporting sand settled in a settling basin, settling basin, etc. of a sewage treatment plant to the outside.

[Prior Art] In a sewage treatment plant, after relatively large garbage contained in inflowing sewage is removed using a dust removal screen, the sand is allowed to settle in a settling basin, and then the next process is carried out. It is necessary to transport the materials efficiently. As an example of a device for this purpose, the cross section of the pond waterway is formed into a V-shape, and the settled sand is lowered along the slope of this V-shaped groove (screw trough) and collected at the bottom of the groove. A screw conveyor is installed to collect the settled sand at the end, and a sand pump is used to transport it outside. This screw conveyor is usually supported and fixed by a frame, and has a structure in which a drive shaft hanging from a drive mechanism installed on the floor above the pond is connected to the rotating shaft of the screw conveyor via a speed reducer etc. It has become.

[Problems to be Solved by the Invention] Incidentally, in the sand pumping device having the above structure, since the drive shaft, the reduction gear connected thereto, and the screw conveyor main body are always underwater, it is possible that a large amount of sand may inflow l
In such a case, the main body of the screw conveyor, the speed reducer, etc. will be buried in the earth and sand, resulting in an overload and no longer being able to transfer the earth and sand. In addition, in order to form a V-shaped groove with an appropriate slope over the entire width of the waterway, the groove becomes deep, resulting in a problem that the civil engineering frame becomes larger than necessary and the cost increases.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a plurality of rows of screw troughs provided substantially parallel to each other at the bottom of the water, and a screw trough provided above the screw troughs. A bogie that runs on a rail installed almost perpendicular to the
a screw conveyor which is suspended by the cart so as to be able to rise and fall and which transfers the earth and sand in the screw trough to the end of the screw trough; and a sand pump which is installed at the end and which carries out the earth and sand from the end out of the water. It is configured with the following.

[Function] In this superior sand pumping device, after the sand in one screw trough is transferred, the screw conveyor is raised to move to another screw trough, and the sand in the screw trough is sequentially transferred to the end. The transported earth and sand will be carried outside using a sand pump. When a large amount of earth and sand flows into the waterway in a short period of time, or when inspecting or repairing the screw conveyor or reducer, raise the screw conveyor to the top.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

Figures 1 to 3 show a sand lifting device of the present invention, which is a water channel that flows gently from left to right in Figure 1.
Sand settling basin) 1 is installed. In this waterway 1, sewage containing sediment flows from the left in the figure, and the right side is connected to treatment equipment such as a settling basin.At the bottom of the water, there are multiple rows of screw troughs 2 that are almost parallel to each other and parallel to the flow path of the waterway 1. is formed. This screw trough 2 is formed in the shape of a gutter by sloped walls 3 on both sides and a bottom part 4 made of concrete or the like, and a partition wall 5 penetrating into the upper part of the water channel 1 is formed at the boundary between the two screw troughs 2. Guide rails 8 are vertically installed on the partition wall 5 and the side wall 6 of the water channel 1 via mounting members 7 at the front and rear positions of the screw trough 2, and are used for positioning when the screw conveyor, which will be described later, is raised and lowered. ing.

Further, a deeper storage section 9 is formed upstream or downstream of the screw trough 2, and this storage section 9 has a sand pump (jet pump, sand pump, packet elevator, etc.) 10 for transporting sand to the outside. is installed.

The upper part of this water channel 1 is covered with a floor plate 11 supported by a partition wall 5 and a side wall 6 of the water channel 1, and on this floor plate 11, a width approximately equal to the length of the screw trough 2 in a direction perpendicular to the water channel 1 is covered. A pair of rails 12 are laid, and a cart 13 is installed on the rails 12 so as to be able to run freely.

A space is formed between the chassis 14 of the truck 13 and the floor plate 11, and it is possible to run on the floor plate 11 with the screw conveyor 15 suspended under the chassis 14. This trolley (3) includes a traveling device 17 that rotationally drives wheels I6, and a lifting device that rotates a winding shaft 19 by an electric motor 18 with a reduction gear and winds up a wire 20 connected to a screw conveyor 15. 21 is provided, and the floor plate 11 is provided with a limit switch (path shown) for limiting the stopping position of the trolley 13. In the screw conveyor 15, a pair of screws 23 having substantially the same length as the screw trough 2 are rotatably supported at the lower part of a frame 22, and an electric motor 24 and the like for rotationally driving the screws 23 is installed. The earth and sand in the trough 2 is transferred to a storage section 9. This frame 22 has a pivot 25 projecting left and right at its front and rear ends, which is pivoted to the lower end of a connecting plate 26, and at the upper end of this connecting plate 26, a connecting rod whose both ends are slidably fitted into the guide rail 8 is attached. It is pivoted to 27. The screw conveyor 15 is connected to a lifting device 21 on the trolley 13 by a wire 20 connected to the left and right ends of the connecting rod 27, and is moved up and down. When this happens, the connecting plates 26 on the left and right sides of the rear surface are tilted so that the frame 22 can escape. Note that 28 is 1! as the screw conveyor 15 moves up and down. This is a take-up reel for winding up or discharging source cables, etc.

Next, the operation of the sand pumping device configured as described above will be described. Sand contained in the sewage flowing into the waterway (sand settling basin) 1 settles on the screw trough 2, and the sand accumulated on the sloped wall 3 slides along the sloped wall 3 and reaches the bottom 4. The screw conveyor 15 is lowered to an appropriate height above the bottom 4 of the screw trough 2 by loosening the wire 20 of the lifting device 21, and then the electric motor 24 is activated to rotate the screw 23 and scrape up the accumulated sand. and transferred to the storage section 9. At this time, if an overload is applied to the screw conveyor 15 due to jamming or jamming, the connecting plate 26 rotates relatively around the pivot shaft 25 and the connecting rod 27 and tilts, causing the frame 22 to move toward the front side. (to the upstream side) to prevent damage.

The transported sand collects in the storage section 9, and is sucked together with water in a concentrated state by a sand pump (sand pump shown) 10 and discharged.

After raking the sand in one screw trough 2, the electric motor 18 of the lifting device 21 is activated, the winding shirt 19 is rotated to wind up the wire 20, and the screw conveyor 15 is moved so that its lower end is above the floorboard 11. Pull it up so that it is. Then, the traveling device 17 is activated to move the cart I3 until the limit switch on the next screw trough 2 is activated, and the wire 20 of the lifting device 21 is loosened to lower the screw conveyor 15. A guide rail 8 that guides the connecting robed 27 of the screw conveyor 15 at both ends thereof.
The guide groove opens upward and widens at the upper end.
The connecting rod 27 is fitted into the guide rail 8 regardless of the slight positional deviation. The screw conveyor 15 descends along this guide rail 8 and returns to the screw trough 2.
Collect the sand from the bottom 4 and repeat this process one after another. Of course, the screw conveyor 15 does not need to be operated all the time, but may be operated in an appropriate cycle depending on the sand accumulation condition, and the life of the screw conveyor 15 and other members can be extended by lifting it up and holding it above the floorboard 11 when not in use. In addition, even when the amount of water increases after heavy rain and a large amount of sand flows in in a short period of time, the screw conveyor 15 is raised to prevent it from being buried and to operate at a height that does not cause overload. do it. Note that it is not necessary to treat each screw trough 2 equally; for example,
If the accumulation in the central screw trough 2 is particularly large,
The sand in this screw trough 2 may be raked more frequently than in other places. Traveling device 1 for the trolley 13 as described above
7. Procedures for operating and stopping the suspension device 21 and the screw conveyor 15 may be stored in advance in the control mechanism, and each device u may be operated in accordance with the procedures.

FIG. 5 shows another embodiment of the present invention, in which hydraulic pressure is used as the drive source for the screw conveyor 15. That is, a hydraulic motor 30 equipped with a speed reducer is installed on the front or rear end plate 29 of the frame 22, and its rotational output is transmitted through a ring-shaped coupling member 32 fixed inside the cylindrical shaft 31 of the screw 23. is transmitted to the screw shaft 31 via. This hydraulic motor 30 is connected to a hydraulic pump (not shown) on the trolley 13 through a flexible hose 33 so that hydraulic oil is supplied thereto.

The actions and effects in this example are the same as above, but
Compared to electric actuators, they have the advantage of preventing accidents such as electrical leakage and being able to output large torque.

[Effects of the Invention] As detailed above, the present invention includes a plurality of screw troughs provided substantially parallel to each other on the bottom of the water, and a rail provided above the screw troughs substantially perpendicular to the screw troughs. A running trolley, a screw conveyor suspended by the trolley so as to be able to rise and fall and transporting the earth and sand in the screw trough to the end of the screw trough, and a screw conveyor installed at the end of the screw trough to transport the transported earth and sand. Since the sand pump is equipped with a sand lifter that carries out sand from the water, the screw conveyor sequentially scrapes up the sand in the screw trough and collects it at the end, and the sand lifter discharges the collected sand to the outside. Therefore, even in a pond with a large area, it is sufficient to form a large number of rows of shallow screw troughs, and the civil engineering framework at the bottom of the pond can be shallow, reducing the amount of construction work required.Since the screw troughs are thinner, a screw conveyor with a small conveyance capacity can be used. , it is possible to reduce costs. Since the screw conveyor can be raised and lowered freely, the service life can be extended by placing it above water when not in use.
When the amount of sand is large, by raising the machine and operating it at an appropriate position, overload can be avoided, and excellent effects such as smooth operation can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a view taken along the ■-■ arrow in FIG. 1, and FIG.
4 is an enlarged view of a part of the frame, and FIG. 5 is an enlarged view of a screw conveyor of another embodiment. 2...Screw trough, 10...Sand pump, 12...Rail, 13...Dolly, 15...Screw conveyor, 17・・・・・・
... Traveling device, 21... Lifting device.

Claims (1)

[Claims] A plurality of rows of screw troughs are provided on the bottom of the water almost parallel to each other, a cart that runs on a rail installed on the top of the screw trough and substantially orthogonal to the screw trough, and a truck that is suspended by the cart so as to be able to rise and fall freely. , a screw conveyor for transferring the earth and sand in the screw trough to an end of the screw trough, and a sand pump installed at the end for transporting the earth and sand from the end out of the water. sand equipment.