JPS6310801Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an underwater reciprocating towed sludge scraper installed in water treatment facilities and the like.

Conventionally, as this type of sludge scraper, the first
What is shown in FIG. 2 and FIG. 2 is well known.
Two submersible carts 8 and 9 equipped with scrapers 8a and 9a for scraping up sediment 2 such as sludge are placed in parallel on the required rails inside the sedimentation tank 1, and the arrows A and B in the figure As shown, one of the underwater carts 8 is moved from the right side in the figure (hereinafter referred to as the rear side) to the left side in the figure (hereinafter referred to as the front side) of the sedimentation tank 1 with the scraper 8a tilted down, and the other underwater cart 9 is moved through the scraper. 9a in the raised state and run in conjunction with each other from the front side to the rear side of the settling tank 1, so that one of the underwater carts 8 scrapes the sediment 2 to the front side of the settling tank 1, and the other submersible cart 8 The trolley 9 returns to the rear side of the settling tank 1 without stirring back the sediment 2, and at the time when each of the underwater trolleys 8 and 9 reaches the front and rear sides of the settling tank 1, the One of the underwater carts 8 is sent back to the rear side of the settling tank 1, and the other underwater cart 9 is made to run to the front side of the settling tank 1 while scraping up the sediment 2.

Here, each of the above-mentioned underwater carts 8 and 9 is attached to a wire rope 7 stretched on a pulley 7a, and this wire rope 7 is connected to a gear reducer 5 and a winding drum by a drive device 3 provided on the front side of the sedimentation tank 1. It is designed to be towed via a rotation mechanism t consisting of 6 parts. In addition, on the front side of the settling tank 1, there is an underwater contact arm 10.
A, a control device 10 consisting of a lifting rod 10b, a spring 10c, and a control switch 10d is installed, and when either of the above-mentioned underwater carts 8, 9 reaches the front side of the sedimentation tank 1, the attached to the underwater cart 8, 9 is installed. The contact hands 8b and 9b press the underwater contact arm 10a of the control device 10, and the lifting rod 10b is pushed up.
As a result, the control switch 10d operates to stop the driving device 3. At the same time, the driving device 3 is started in reverse to move each underwater cart 8, 9 to the rear and front sides of the sedimentation tank 1. It is designed to run separately.

By the way, in such a sludge scraper, overload may occur in each of the submersible carts 8, 9, etc., but in this case, the shear pin of the shear pin device 4 attached to the drive device 3 is cut off, and the transmission of driving force is interrupted. While damage to the sheared and severed parts is ultimately prevented, an abnormality detection switch 4a attached to the shear pin device 4 is activated so that the operator can be informed of the abnormality. However, since the shear pin strength to be cut is determined by strength calculation, the design strength may differ from the actual strength to be cut, or the actual strength may decrease due to long-term continuous and intermittent loads. When an overload occurs and the operation is adjusted, a large number of shear pins have to be broken. Further, when a plurality of underwater carts 8 and 9 are towed by one drive device 3 as shown in the illustrated example, the control device 10 is usually disposed only at one end of the sedimentation tank 1; When approaching the end where the control device 10 of No. 9 is not located, the underwater carts 8 and 9 are installed to prevent the underwater carts 8 and 9 from colliding with the wall surface due to elongation of the wire rope 7 over time. .

The present invention has a structure in which a disconnector is provided between the drive device and the rotating mechanism to transmit the driving force when the load is appropriate, and to cut off the driving force when the load is overloaded. The above-mentioned conventional problems have been solved by attaching a control switch so that the drive device rotates in reverse according to the breakage of the coupling, and uses parts that are unstable and intended to be worn out, such as shear pins. This makes it possible to accurately stop and reverse the submersible cart when it reaches the end of the sedimentation tank, and to significantly improve operability. The purpose is to provide.

Hereinafter, the present invention will be explained in detail based on the drawings. Figures 3 to 7 show an embodiment of the present invention, in which reference numeral 11 indicates a rectangular precipitator. Inside this sedimentation tank 11, two sets of rails are laid in parallel from the front side (left side in Figure 3) to the back side (right side in the figure) of the sedimentation tank 11, and each set of rails is connected to the submerged tank. Carts 18 and 19 are mounted. These underwater trolleys 18 and 19 are operated by a drive device 13 and a connecting/disconnecting device 14
It is attached to a wire rope 17 that is towed via a rotating mechanism T, so that it can reciprocate between the front and rear sides of the sedimentation tank 11 in conjunction with each other. That is, the wire rope 17 is reciprocated between the front side and the rear side of the sedimentation tank 11 along one set of rails, and at the same time is changed course by a pulley 17a provided at an appropriate location and moved to the other side. The underwater carriages 18 and 19 are reciprocated along the set of rails in the opposite direction to the one set of rails, and one of the underwater carriages 18, 19, for example 18, is on the front side of the sedimentation tank 11. The other underwater trolley, for example 19, is attached to the wire rope 17 so that it reaches the rear side just before reaching the wire rope 17.

Further, each of the underwater vehicles 18, 19 is provided with scrapers 18a, 19 having a predetermined length in the vehicle width direction.
The scrapers 18a and 19a are tilted downward when the submersible carts 18 and 19 are moved from the back side of the settling tank 11 to the front side, and the scrapers 18a and 19a scrape the sludge that has settled on the bottom of the settling tank 11. The sediments 12 such as This prevents the precipitate 12 from being stirred up.
Furthermore, contact hands 18b and 19b are provided protruding from the moving front and rear parts of each of the underwater trolleys 18 and 19, respectively, so that each of the underwater trolleys 18 and 19 can settle 11
When the robot reaches the front or rear wall, these contact hands 18b, 19b are brought into contact with the wall.

On the other hand, the drive device 13 is composed of a prime mover that can freely rotate in forward and reverse directions, and as described above, the
4 and a rotating mechanism T to pull the wire rope 17, and is provided in front of the settling tank 11. Further, the rotation mechanism T has a wire rope 17
A pair of winding drums 16 for winding and unwinding
and a gear reducer 15 that reduces the rotational force of the drive device 13 and rotates the winding drum 16 at a predetermined speed.

The above-mentioned disconnector 14 is connected to the drive device 13 and the gear reducer 1.
5 to transmit or disconnect the driving force of the drive device 13, and as shown in FIGS. 5 and 6, the shaft 14a rotated by the drive device 13 is a movable plate 14f that is movably provided on the movable plate 14f; a fixed plate 14g that is opposed to the movable plate 14f, is rotatably attached to the shaft 14a via a bearing 14h, and is connected to the gear reducer 15; , the movable plate 14f and the fixed plate 1
A plurality of balls 14d sandwiched between 4g and 4g;
A spring 14c provided on the back surface (right side surface in FIG. 5) of the movable plate 14f, and this spring 14c.
and a load setting screw 14b that is abutted from the back side and screwed onto the shaft 14a.

Here, the movable plate 14f is pressed against the fixed plate 14g by a spring 14c, and this pressing force can be adjusted by adjusting the load setting screw 14b. Furthermore, when the ball 14d is properly loaded, the plurality of grooves 14m and 14 formed in the movable plate 14f and the fixed plate 14g
n to transmit the driving force of the drive device 13 to the rotating mechanism T. However, when an overload occurs on the underwater carts 18, 19, etc., the movable plate 14f is disengaged from the grooves 14m, 14n. and fixed plate 14g
As a result, the spring 14c is contracted and the movable plate 14f is moved toward the drive device 13, and at the same time, the drive force is easily transmitted from the drive device 13 to the rotation mechanism T. It is configured to be disconnected.

Further, a control switch 14i is disposed at an appropriate position in the rear direction of the movable plate 14f, and
4f is moved to the drive device 13 side, the back surface of the movable plate 14f is connected to this control switch 1.
4i, the control switch 14i is activated, and the drive device 13 is stopped and reversed.

The balls 14d are held in the elongated holes H of the ball guide plate 14e so that they do not come off even when they are separated from the grooves 14m, 14n of the movable plate 14f and fixed plate 14g. Further, as shown in FIG. 7, the long hole H is bored with a slight inclination with respect to the radial direction of the movable plate 14f and the fixed plate 14g, and for example, the long hole H
Assume that 4d is positioned at one end of the elongated hole H as shown by the interrupted plane in the figure, and the driving force of the driving device 13 is transmitted to the rotation mechanism T. At this time, if an overload occurs on the rotating mechanism T side, the ball 14d will move through the elongated hole H.
The drive device 13 moves to the other end and leaves the grooves 14m, 14n to cut off the driving force.
When the ball 14d begins to reverse, the ball 14d is again moved to one end of the elongated hole H, and the driving force is transmitted. The shape of this elongated hole H is not limited to that shown in the figure.

Next, the operation of the present invention will be explained. Figures 3 and 4 show the sludge scraper of the present invention in operation, with one of the submersible carts 18 scraping up sediment 12 with a scraper 18a as shown by arrow A in the figure. 11 runs from the rear side to the front side, and the other underwater trolley 19 is indicated by arrow B in the figure.
As shown, the scraper 19a is raised and runs from the front side of the sedimentation tank 11 to the rear side. Here, as shown in FIG.
n, and the movable plate 14f and fixed plate 14g rotate integrally. When each of the underwater vehicles 18 and 19 moves further from this state, the contact hand 19b of the other underwater vehicle 19 reaches the rear wall of the sedimentation tank 11, and the wire rope 17 and the winding drum 1
6. High torque is generated in the disconnector 14 via the gear reducer 15. Then, the fixed plate 14g on the driven side of the coupling/disconnector 14 tries to stop, while the movable plate 14f on the driving side is pressed in the direction of the fixed plate 14g by the reaction force of the spring 14c and rotates. The force loses and the ball 14d hits the ball guide plate 14e.
The movable plate 14f and the fixed plate 14g are separated from the grooves 14m and 14n while being guided by the movable plate 14f and the fixed plate 14g, and the driving force is suddenly cut off. At this time, ball 1
4d widens the gap between the fixed plate 14g and the movable plate 14f, the movable plate 14f is pushed back toward the drive device 3 and its back surface contacts the control switch 14i, which activates the control switch 14i to close the drive device 13.
After stopping, start it in reverse.

When the drive device 13 starts reverse rotation, the movable plate 14
The ball 14d is fitted into the grooves m and n of the fixed plate 14g, and these three components begin to rotate integrally in the same direction, thereby transmitting the driving force. Then, the wire rope 1 passes through a gear reducer 15 and a winding drum 16.
7 is towed in the opposite direction, one of the underwater carts 18 raises the scraper 18a and runs from the front side of the sedimentation tank 11 to the rear, while the other underwater cart 19 knocks down the scraper 19a and scrapes up the sediment 12. It runs from the rear side of the settling tank 11 to the front side.

In addition, even if any overload occurs on each underwater vehicle 18, 19, the same operation as described above is repeated, and when the load is reduced to an appropriate state, each underwater vehicle 18, 19
19 runs while collecting the sediment 12, and the other runs in the opposite direction.

As described above, according to the present invention, a disconnector is provided that transmits the driving force when the load is appropriate and cuts off the driving force when the load is overloaded, and the disconnector detects the disconnection of the driving force. Since it is equipped with a control switch that stops and reverses the drive device, there is no need to use a shear pin that wears out frequently as in the past, greatly improving work efficiency, and by adjusting the load setting screw. Since the set load can be easily adjusted, the underwater trolley can be stopped or reversed accurately, and the operation can be adjusted quickly.Moreover, there is no dead space from one end of the underwater trolley to the other end where the underwater trolley is likely to settle. Since the sludge scraper can be moved without forming a sludge scraper, the area where sediment cannot be scraped can be significantly reduced compared to conventional sludge scrapers, and a sludge scraper that is extremely easy to implement can be provided.

[Brief explanation of drawings]

1 and 2 show an example of a conventional sludge scraper, with FIG. 1 being a plan view and FIG. 2 being a sectional view. 3 to 7 show an embodiment of the present invention, in which FIG. 3 is a plan view of the sludge scraper, FIG. 4 is a sectional view of the same, and FIG. FIG. 6 is a partially cutaway side view showing the disconnector in a state in which the breaker is disconnected, FIG. . 11... Precipitation, 13... Drive device, 14...
...Disconnector, 14c...Spring, 14d...Ball,
14f...Movable plate, 14g...Fixed plate, 14i...
...Control switch, 17...Wire rope, 18...
...Underwater trolley, 18a...Scraper, 19...Underwater trolley, 19a...Scraper, T...Rotating mechanism.

Claims (1)

[Scope of utility model registration request] An underwater trolley equipped with a scraper for scraping up sediment is connected to a wire rope that is towed by a drive device via a rotating mechanism, and when the driving device operates, the underwater cart moves back and forth through the sedimentation process to remove the sediment. In the sludge scraper, a device is provided between the drive device and the rotation mechanism to transmit the driving force of the drive device to the rotation mechanism when the load is appropriate, and to transmit the drive force from the drive device to the rotation mechanism when the load is overloaded. A disconnector is installed to disconnect the
A sludge scraper characterized in that the above-mentioned switch-breaker is equipped with a control switch that detects the cut-off operation of the switch-breaker and reverses the driving device.