JPH0334245Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a drive mechanism for a submerged clarifier that travels at the bottom of a sedimentation tank in water purification plants, sewage treatment plants, etc., and scrapes up the sedimentation tank. be.

Conventional technology A sludge scraper, in which a traveling vehicle equipped with a scraper on the underside is run on a rail provided at the bottom of a sedimentation tank to scrape up and remove sludge and other sediment, is known as a submerged clarifier. It is publicly known.

Figure 5 shows one of the conventionally known submerged clarifiers.
In this example, a traveling cart 3 mounted on a rail 2 laid at the bottom of a sedimentation tank 1 is guided by a wire rope 5 to a pulley 4 attached to a side wall of the sedimentation tank 1. The wire rope 5 is wound around a winding ram 7 driven by a drive motor 6, so that the carriage 3 moves along the rail 2. . And when the traveling trolley 3 moves,
A scraping plate 8 attached to the lower part of the truck 3 is adapted to scrape up sludge and other deposits α.

Problems to be Solved by the Invention As described above, in conventional submerged clarifiers, the driving mechanism for the traveling truck is located on the ground, and the traveling truck is towed by a wire rope. A winding device is required, and cutting accidents are not uncommon due to the long wire rope extending through the air and water surface.
Also, multiple wire ropes (at least two on the left and right)
Since the running bogie is towed by the rope, there is a problem in that if there is a difference in stretch between the left and right ropes, the bogie is likely to come off the rail.

In order to solve this problem, a self-propelled clarifier was proposed in which a submersible motor and a power transmission device were mounted on a trolley. The problem remains that maintenance and inspection are troublesome.

Therefore, the purpose of this invention was to solve the above-mentioned problems with the rope-pulled type and submerged self-propelled type clarifiers, and to prevent accidents such as wire rope breakage, unbalanced traction force, and cart derailment due to settled sludge. An object of the present invention is to provide a self-propelled submerged clarifier which is free from the risk of sludge scraping, which can surely scrape up sludge, and which can omit the ground space for installing a conventional driving part.

Means for Solving the Problems This invention is aimed at submerged clarifiers in which a trolley reciprocates on rails laid at the bottom of the sedimentation tank and scrapes up sediment with a raking plate attached to the trolley. A reduction motor is installed at the top above the water surface of a hollow column installed on the truck, and this electric motor and a horizontal rotating shaft installed on the truck are connected by a transmission shaft installed in the hollow column, and the sediment is transferred to the rotating shaft. It is characterized by the provision of a gear that meshes with a rack installed on the inner wall of the tank.

Embodiment In FIGS. 1 to 4, a hollow column 13 is installed on a truck 11, and a reduction motor 12 is mounted on the top of the hollow column 13, which is located above the water surface. The upper end of a transmission shaft 15 installed in a hollow column is connected to the output shaft, and the lower end of this transmission shaft 15 is interlocked with the horizontal rotating shaft 14 on the trolley 11 in an underwater gearbox 30 mounted on the trolley 11. The rotation axis 1
A gear 16 is attached to each end of the gear 4.

A rack 17 that meshes with this gear 16 is provided on the inner wall of the sedimentation tank 10, and the power of the electric motor 12 is transmitted to the rotating shaft 14 to rotate the gear 16, thereby causing the wheels 19 of the trolley 11 to The trolley 11 moves by rotating on rails 18 laid at the bottom of the trolley. A scraper 20 is provided at the front and rear of the wheel 19, which has a surface that slides on the surface of the rail 18 and removes sludge and the like from the surface of the rail 18 when the truck 11 moves.

A pair of horizontal rotating shafts 21 perpendicular to the running direction of the trolley 11 are provided at the front and rear of the lower part of the trolley 11, and front and rear scraping plates 22, 22' are respectively attached in parallel to these rotating shafts 21. A scraper 23 is attached to the lower end of these scraping plates 22, 22'. Further, four arms 24, 24' are attached to each rotating shaft 21 in the same direction, one pair each on the left, right, front and rear, and the upper ends of each arm 24, 24' are connected by a connecting rod 25 via a pivot 26. has been done. A reversing roller 27 is attached to the inside of the pivot 26, and a counterweight 28 is detachably attached to the outside. Reference numerals 29 and 29' are stoppers for use when the arms 24 and 24' are tilted, and are provided on the truck frame.

At the forward and backward end of the truck 11 in the sedimentation tank 10, at a position facing the reversing roller 27,
There are provided seats 33, 34 which contact this roller 27 and reverse the arms 24, 24'.

31 is a cap tire cable that supplies power to the electric motor 12 by a control unit (not shown); 32 is a sedimentation tank 1;
An insulated trolley installed on top of the gearbox 13 serves as a guide for the movement of the hollow column 13, 35 is a water sealing pump for the gearbox 30, and 36 is a water injection pipe for the gearbox 30.

The operation of the above device will be explained.

FIG. 3 shows a state in which the truck 11 is moving forward, and at this time, due to the rotation of the electric motor 12 in one direction, the gear 16 is rotated via the transmission shaft 15 and the rotation shaft 14.
Due to this engagement with the rack 17, the truck 11 moves forward in the direction of the solid arrow. At this time, the scraping plate 22 is almost vertical, and the scraper 2 at its lower end is
3, the upper arms 24, 24' are tilted forward, and this state is maintained by the weight of the counterweight 28 and the action of the stoppers 29, 29'. When the sediment is moved to the forward end in this manner, the collected sediment is driven down to the deep part of the sedimentation tank 10.

When the cart 11 moves to the forward end in this way, the reversing roller 27 moves a
The trolley 11 is brought into position and abuts against the stopper 33.
As the arm moves forward, it sequentially moves from position a to positions b and c, and as a result, the arms 24 and 24' are tilted in the opposite direction to the front, and the scraping plates 22 and 22' are also rotated upward to move to the position b and c. The state shown in FIG. 4 is reached, and the trolley 11 stops here.

The electric motor 12 is then reversed to move the truck 11 backward, but at this time the scraping plates 22, 22'
As shown in the fourth diagram, the lower end of the scraper 23 rotates upward from the bottom of the settling tank 10.
There is no need to scrape up sediment.

When the truck 11 moves to the backward end in this way, the reversing roller 27 comes into contact with the stopper 34 as shown by the chain line, and as the truck 11 moves backward, the arm 2
4' sequentially moves from position a' to positions b' and c', and the scraper 23 returns to the initial scraping position.

The sediment is scraped up by repeating the above process, but all of this action is controlled from the ground, and during this time the reduction motor 12
rotates in both forward and reverse directions, and the trolley 11 moves forward and backward due to the engagement between the gear 16 and the rack 17, and the scraper 23 is automatically switched to the position for scraping sediment when moving forward, and to the non-scraping position when moving backward. The trolley 11 due to sedimentation is
The floating and derailment of the gear 16 are prevented by the downward force exerted by the rack 17 on the gear 16.

Effects of the invention This invention is as described above, and a reduction motor is installed at the top above the water surface of a hollow column erected on a cart, and the power of this motor is transmitted to the cart through a transmission shaft in the hollow column. It is different from the conventional rope-pulled type, as the trolley is moved by the gears attached to the horizontal rotation shaft and the racks installed on the inner wall of the sedimentation tank. It is possible to avoid mechanical troubles caused by towing ropes, such as wire rope breakage and wheels coming off due to unbalanced traction force. Because the drive gears mesh easily, the left and right sides are evenly driven, so even if the precipitated sludge is piled up on one side, it can be scraped up reliably. Furthermore, since the electric motor is located outside the liquid surface, there is no need to pay special consideration to its watertightness.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of this invention, Fig. 2 is a cross-sectional view taken along the - line of Fig. 1, Fig. 3 is a sectional view taken along the - line of Fig. 2 when moving forward, Fig. 4. 1 is a sectional view taken along the - line at the time of retraction of the vehicle shown in FIG. 1, and FIG. 5 is a schematic diagram showing a conventional example. 11... Trolley, 12... Reduction motor, 13...
Hollow column, 14... Rotating shaft, 15... Transmission shaft, 16
...Gear, 17...Rack, 18...Rail, 1
9...Wheel, 21...Rotating shaft, 22, 22'...
Scraping board, 23...Scraper.

Claims (1)

[Scope of utility model registration request] In a submerged clarifier, a trolley reciprocates on rails laid at the bottom of the sedimentation tank, and a scraping board attached to the trolley scrapes up the sediment. A reduction motor is installed on the top, and this motor and a horizontal rotating shaft installed on a trolley are connected by a transmission shaft installed in a hollow column, and the rotating shaft is engaged with a rack installed on the inner wall of the sedimentation tank. A self-propelled submersible clarifier featuring gears.