JPS6111304Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic dust removal device that uses a scraping piece to rake up dust caught on a bar screen installed to catch dust in rivers, irrigation canals, and other waterways, and removes it with a wiper. .

Conventionally, irrigation canals used for hydroelectric power generation and other purposes are equipped with a dust remover consisting of a bar screen and a rake that moves along with the bar screen to remove debris, and automatically removes debris from the canal. However, in this type of automatic dust remover, the rake has comb-like teeth or claws, so if water algae, vinyl, or cloth gets wrapped around or tangled in the rake, it will be removed. It almost never separates automatically due to gravity, etc., and cannot be removed unless a special device is installed, which not only severely impedes the rake's performance, but also creates an extra load and wastes driving power, making it useless for energy conservation. . Therefore, various methods have already been proposed, such as a wiper method using a scraping arm or a flushing method using pressurized water. There is.

However, conventional wiper systems are known to take power directly from the rake chain drive power, or to operate by utilizing the wiper being pushed away by the movement of the rake, and return to normal due to gravity. However, all of these require complicated link mechanisms (for example, Utility Model Publication No. 47-30180 or Utility Model Application Publication No. 53) to obtain the necessary wiper operating trajectory.
Not only is it difficult to apply a positive scraping force, the operating efficiency is also unsatisfactory, and the reverse movement of the rake chain is only allowed for a short period of time, or it is not possible at all, resulting in frequent There are also problems in terms of operation management, such as being forced to suspend operations due to traffic congestion, and being difficult to manage. In particular, the size of the dust that lands on the rake is unpredictable and miscellaneous, and in order to be able to remove large dust, the trajectory of the wiper must be extremely complicated, and this type of dust remover requires a main screen. In many cases, foreign matter that might get caught between the chain and the rake, or elsewhere, can be easily removed by reversing the chain, so the fact that reversing is restricted or even impossible is a fatal drawback for a dust remover. This is often the case.

This invention is an attempt to eliminate various drawbacks of the conventional automatic dust remover, which uses a rake attached to an endless chain to scrape up the dust captured on the waterway screen. The purpose of the present invention is to provide a device that can efficiently and automatically eliminate such substances and whose operation can be easily controlled.

The present invention is a dust removal device in which a piece of scraping dirt is arranged so as to be movable up and down via an endless chain along a bar screen provided in a waterway, and a wiper is provided to remove the rubbish on the scraping piece. The wiper is provided on an arm that is swingably supported by a support shaft, and a piston is slidably installed inside the wiper in order to rotate the wiper in an arc shape with respect to the rake claw, and the wiper is provided with a piston that is slidably installed inside the arm and is filled with hydraulic oil. A second hydraulic cylinder is connected in series through a line for supplying and discharging hydraulic oil in the first hydraulic cylinder, and a balance weight is connected to the piston in the cylinder via a rod, and the hydraulic oil is supplied and discharged in the hydraulic cylinder. This automatic dust removal device is characterized by having a deaeration hole that is open to the atmosphere on the non-filling side.

The present invention will be explained with reference to an embodiment of an automatic rake-type dust remover with front raking and back descending method. 1 is an endless chain, 2 is a rake attached to the chain, which moves along the main screen 3, and the outer edge of the rake is operated as shown in trace 2'. 4 is a carry-out conveyor placed in the horizontal direction. The wiper 5 has an arm 51 swingably supported by a support shaft 52 supported by a bearing 71 fixed to the upper frame 7.
It is removably installed at the tip of the. This spindle 5
One end of 2 is an arm 51', a pin 52', and a yoke 61.
It is connected to the rod 62 of the first hydraulic cylinder 6 via.

The first hydraulic cylinder 6 has its respective hydraulic oil filling parts connected in series through piping 10, and the second hydraulic cylinder 8 is installed on a frame or pedestal as appropriate, and a balance weight 9 is attached to the rod 81 of the second hydraulic cylinder 8. is suspended, but the balance weight 9 is set so that the wiper 5 is at the standby position 5A in its lowered position.

In the standby position 5A, the wiper 5 is disposed so that its tip protrudes into the travel trajectory of the rake 2, and as the rake 2 descends, the wiper 5 is forced to move around the spindle 52. The rake 2 is rotated to scrape off foreign objects into the chute 17 while sliding on the lower surface of the rake 2.
In this case, the rake 2 pushes down the wiper 5 against the gravity of the balance weight 9, and then the wiper 5
When the wiper 5 moves out of the trajectory of the rake 2 and is released, the balance weight 9, which had been raised, descends, and the wiper 5 also returns to the waiting position 5A. Further, an atmospheric opening 11 is provided on the non-hydraulic oil filled side of the hydraulic cylinders 6, 8 so as not to interfere with the reciprocating movement of the piston in the cylinder.

Incidentally, it is also possible to prevent the foreign objects raked up when the rake 2 reverses and descends from falling outside the chute 17 by its own weight, for example, by tilting the reversing section or attaching a foreign object guide plate. It is also possible, for example, to configure the hydraulic oil filling section in the opposite way so that the rake pushes up the screen and sweeps away foreign matter, that is, the wiper is disposed directly above the screen.

In the figure, 73 is a support pin, 74 is a bracket, 1
1 is a chain wheel, 12 is a rolling wheel, 13 is a drive wheel such as a chain wheel, 14 is a motor, 15 is a frame support, and 16 is a cover.

As the rake 2 descends with the foreign matter still attached to it, it comes into contact with the tip of the wiper 5 (position 5).
A) Push down the wiper 5 against the gravity of the balance weight 9 to position 5B and rotate it. At this time, the tip of the wiper 5 slides on the lower surface of the wiper 5 in contact with the wiper 5 while drawing an arcuate locus, and brushes off foreign matter into the chute 17. Then wiper 5 is at position 5B
The rake 2 deviates from the locus of the rake 2 and becomes free, and accordingly the balance weight 9 descends and the wiper 5 returns to the position 5A, but the operation is controlled by the hydraulic cylinder and stable operation is possible.

Note that the hydraulic oil only moves between the first hydraulic cylinder 6 and the second hydraulic cylinder 8, and is driven after, for example, the oil supply hole is closed.

The present invention is a dust removal device in which a bar screen provided in a waterway is provided with a wiper for removing dirt on a scraping piece. In order to rotate in an arc shape with respect to the pawl, a piston is slidably installed inside the piston, and a second hydraulic cylinder is connected in series through a line that supplies and discharges hydraulic oil in the first hydraulic cylinder filled with hydraulic oil. , a balance weight is connected to the piston in the cylinder via a rod, and the hydraulic cylinder has a deaeration hole that is open to the atmosphere on the side that is not filled with hydraulic oil, so that the wiper can be functionally operated. In addition, the balance weight can be installed at any position, and the piping 10 connecting the first hydraulic cylinder 6 and the second hydraulic cylinder 8 can be expanded and contracted as appropriate. The hydraulic cylinder 8 can be installed at any easy-to-install location, and the size of the weight is not limited in any way, so the required pressing force can be easily generated and cleaning can be completed. By making the diameter of the second hydraulic cylinder 8 multiple times the diameter of the cylinder 6, the weight of the weight and the distance it moves can be reduced in inverse proportion, contributing to more compact equipment and lower costs. In addition, a set pressure is applied to the piston surface of the hydraulic cylinder to give the wiper a resistance force against pushing down, thereby generating various cleaning forces, which can be used to remove debris of various sizes that come on the rake. Since it is easy to clean and can improve the cleaning effect, it is possible to provide an automatic dust removal device with improved workability and easy maintenance and security.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view, Fig. 2 is a front view, Fig. 3 AB is an explanatory view of the operation, Fig. 3 A is the beginning of scraping, and Fig. 3 B is the completion of scraping. FIG. 4 is an explanatory diagram of the system in use. 1... Endless chain, 2... Rake, 3... Screen, 4... Unloading conveyor, 5... Wiper, 51... Arm, 52... Support shaft, 6, 8...
hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] A dust removal device in which a piece of scraping debris is disposed along a bar screen provided in a waterway so as to be movable up and down via an endless chain, and a wiper is provided for removing debris on the scraping piece, wherein the wiper is provided on an arm that is swingably supported by a support shaft, and a piston is slidably installed inside the wiper in order to rotate the wiper in an arc shape relative to the rake claw, and the first hydraulic cylinder is filled with hydraulic oil. A second hydraulic cylinder is connected in series through a line for supplying and discharging hydraulic oil, and a balance weight is connected to the piston in the cylinder via a rod, and in the hydraulic cylinder, a side not filled with hydraulic oil An automatic dust removal device characterized by having a deaeration hole that is open to the atmosphere.