JPH0422801Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a so-called double scraper type scraper for sludge, silt, etc., in which scrapers are rotatably provided at the front and rear of a cart.

[Conventional technology]

Figure 7 shows a conventional double-scraper type submerged sludge/sand scraper disclosed in Japanese Utility Model Application No. 59-93606.The scraper 1 is installed on both sides of the bottom of the tank. Brackets 5, 5 are vertically provided at the front and rear of the trolley 4 supported by the rail 2 and wheels 3, 3, and scrapers 6, 6 are rotatably provided on the brackets 5, 5, respectively. are connected by links 7, 7, levers 8, 8, and connecting rod 9, and are rotated in parallel by operation of a rotation operation mechanism 10. During the scraping process, the scrapers 6, 6 rotate and hang down to scrape the tank bottom 11, pushing the sludge 12 and the like into a hopper 13 formed deeply at the end of the tank bottom 11.

[Problem that the invention attempts to solve]

However, in the above-mentioned method, the front and rear scrapers always rotate in parallel, and scraping is performed with the same distance between each scraper and the tank bottom, so most of the load in the scraping process of the scraper is placed on the front scraper. It was a burden. Furthermore, the sludge and sand deposited on the bottom of the tank are relatively dense, hard, and heavy at the bottom, and relatively soft and light at the top, but almost all of this is borne by the front scraper. As a result, the load balance was extremely poor.

Therefore, an object of the present invention is to provide a double scraper type scraper for sludge, silt, etc. that can maintain the same load balance between the front and rear scrapers during scraping.

[Means for solving problems]

In order to achieve the above object, the present invention has rotatable scrapers at the front and rear of the cart, and both scrapers can be switched between a rotating hanging state and a substantially horizontal returning state, and a sedimentation tank or a sedimentation tank. In a scraper for sludge, sand, etc. that moves back and forth on the bottom of the tank, the distance between the front scraper and the tank bottom when scraping sludge, sand, etc. is set, and the distance between the rear scraper and the tank bottom is It is characterized by being wider.

[Effect]

Therefore, since the front scraper scrapes the upper part of the sludge, silt, etc. accumulated on the tank bottom, and the rear scraper scrapes the lower part, the load on both the front and rear scrapers when scraping up sludge, silt, etc. is approximately the same. be able to.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

The raking machine 20 is guided by a plurality of pulleys 21, 21, and is moved to the tank bottom 24 by the operation of a wire rope 23 connected to a drive device (not shown) on the upper part of a tank 22 such as a sedimentation tank or a sedimentation tank. Accumulated sludge 2
Wheels 27 that roll on rails 26 installed on both sides of the bottom of the tank 22,
27, and scrapers 30, 3 rotatably mounted on brackets 29a, 29b disposed at the front and rear of the trolley 28, respectively.
It consists of 1.

Front scraper 30 that becomes the front side during the scraping process
The center part is pivoted to a bracket 29a hanging from the front lower part of the truck 28, and the upper end is connected to a link 32.
It is connected to the lever 33a via a. In addition, the rear scraper 31 has a center portion pivoted to a bracket 29b provided at the rear end of the truck 28, an upper end portion connected to a lever 33b via a link 32b, and the lever 33b is connected to a turnbuckle at an intermediate portion. 34 is connected to the lever 33a on the front side, and the front scraper 30
It rotates with the rotation of.

During the scraping process, the rear scraper 31 is moved so that the lower end 3
1a is rotated and suspended to the extent that it comes into contact with the tank bottom 24. The hanging position of the lower end 31a, that is, the rotation angle of the rear scraper 31, is determined by the contact between the lower end 31a of the rear scraper 31 and the tank bottom 24, the contact between the rear scraper 31 and the bracket 29b, or a separately provided stopper. It is positioned by The lower end 31a of this rear scraper 31 is
In order to reduce the amount of sludge 25 and the like remaining on the tank bottom 24, it is formed into a flat shape as shown in FIG.

The distance between the lower end 30a of the front scraper 30 and the tank bottom 24 during rotational hanging is set wider than the distance between the lower end 31a of the rear scraper 31 and the tank bottom 24. This interval is appropriately determined depending on the amount and condition of the sludge 25 etc. deposited on the tank bottom 24.
4 to change the length of the connecting rod 35, change the relative angle of the front and rear levers 33a, 33b, that is, the relative angle of the front and rear scrapers 30, 31 connected to both levers 33a, 33b, and Adjust the angle of the scraper 30 with the tank bottom 24 to the rear scraper 3.
This can be adjusted by making the angle shallower than the angle with the tank bottom 24 of No. 1.

In the raking machine 20, when the wire rope 23 is pulled toward the raking side, the lever 33a on the front side rotates to the forward position shown by the solid line in FIG. Front scraper 30, connecting rod 35, lever 33 connected via
b and the rear scraper 31 connected via the link 32b rotate and hang down to the scraping position, and the cart 28 moves to the scraping side to remove the sludge 25 and the like from the hopper provided on one side of the tank bottom 24. Raise it to 24a.

At this time, since the distance between the front scraper 30 and the tank bottom 24 is set wider than the distance between the rear scraper 31 and the tank bottom 24, the front scraper 30 scrapes the top of the sludge 25 etc. accumulated on the tank bottom 24. , the rear scraper 31 scrapes the lower part of the sludge 25, etc., and the loads such as the scraping amount and scraping force of both the front and rear scrapers 30, 31 can be made equal, reducing the burden on the front scraper 30. As a result, it is possible to prevent the occurrence of troubles in the raking machine 20 and to reduce the power cost for operating the raking machine 20.

Furthermore, when the wire rope 23 is pulled in the opposite direction, the lever 33a on the front side rotates to the rear position shown by the imaginary line in FIG. The trolley 28 is moved backward in a horizontal state.

Further, as shown in FIG. 2, if there is a difference in density or hardness between the upper part 25a and the lower part 25b of the sludge 25 etc. deposited on the tank bottom 24, the front scraper 30 is used to remove the softer and lighter upper part 25a of the sludge. By scraping up a large amount of sludge and scraping up the hard and heavy part of the lower sludge portion 25b with the rear scraper 31, the scraping forces of both the front and rear scrapers 30, 31 can be made equal.

Furthermore, since the angle between the lower part of the front scraper 30 and the tank bottom 24 is set shallow, the resistance between the front scraper 30 and the sludge 25 is reduced. In addition, the shape of the lower end 30a of the front scraper 30 is replaced with the normally used flat shape shown in FIG.
As shown in FIG. 4, the sludge can be formed into a chevron-shaped or comb-like shape to scrape and disperse the hard parts of the lower sludge 25b accumulated on the tank bottom 24, thereby reducing the burden on the rear scraper 31.

FIG. 6 shows another embodiment of the present invention, in which the vertical width of the front scraper 40 is formed narrower than the vertical width of the rear scraper 31 and is connected by a connecting rod 41, and is constructed in the same manner as in the previous embodiment. The front scraper 40 is attached to the trolley 28 with a larger distance from the tank bottom 24, and the load on the front scraper 40 during scraping is reduced as in the previous embodiment.

In addition to adjusting the distance between the front and rear scrapers and the tank bottom, in addition to adjusting the length of the connecting rod and changing the vertical width of the front and rear scrapers, you can also adjust the length and angle of the bracket, lever or link, mounting position, etc. This can also be done by adjusting.

[Effect of idea]

As explained above, the scraper for sludge, sediment, etc. of the present invention is designed to adjust the distance between the scraper on the front side and the bottom of the tank when scraping sludge, sediment, etc. Because it is wider, the front and rear scrapers can equally balance the load when scraping sludge, etc., and both the front and rear scrapers can be used effectively, reducing the amount of sludge, silt, etc. left to scrape, and the front scraper It is possible to reduce the burden on the raking machine, prevent troubles with the raking machine, and further reduce the power cost for operating the raking machine.

Furthermore, if the angle of the front scraper with the tank bottom during scraping is made shallower than the angle of the rear scraper, the burden on the front scraper can be further reduced.

[Brief explanation of drawings]

Figures 1 to 5 show one embodiment of the present invention. Figure 1 is a side view showing how a scraper for sludge, sediment, etc. is installed on the tank bottom, and Figure 2 is a side view showing how the scraper for sludge, sediment, etc. is installed on the bottom of the tank. Fig. 3 is a front view of the front scraper, Fig. 4 is a front view showing another shape of the front scraper, Fig. 5 is a front view of the rear scraper, and Fig. 6 is a front view of the front scraper. A side view of a scraping machine showing another embodiment, and FIG. 7 is a side view of a conventional scraping machine. 20... Scraping machine, 24... Tank bottom, 25... Sludge, 28... Cart, 30... Front scraper, 3
1... Rear scraper, 32a, 32b... Link, 33a, 33b... Lever, 34... Turnbuckle, 35... Connecting rod.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Scrapers are rotatably provided at the front and rear of the cart, and both scrapers are rotated to switch between a drooping scraping state and a substantially horizontal return state to scrape the bottom of a sedimentation tank or sedimentation tank. In a scraper for sludge, sand, etc. that moves back and forth, the distance between the scraper on the front side and the bottom of the tank is made wider than the distance between the scraper on the rear side and the bottom of the tank when scraping sludge, sand, etc. A raking machine for sludge, silt, etc., characterized by: 2 The angle of the scraper on the front side with the bottom of the tank is
A scraper for sludge, sediment, etc. as claimed in claim 1, characterized in that the scraper on the rear side has a shallower angle than the angle with the bottom of the tank.