JP4648345B2 - Rake device - Google Patents

Description

  The present invention relates to a rake device, and in particular, in a sewage treatment or river drainage treatment, etc., it is installed in a treatment plant etc. This is a rake device suitable for a coarse dust / fine dust bar screen type dust remover that is configured by combining a dust rake with a rake body that has rake teeth for coarse waste and that can remove dust contained in drainage. is there.

Conventionally, in sewage treatment or drainage treatment at a sewage treatment plant or a river effluent treatment plant, in order to remove waste contained in the sewage or wastewater to be treated, the flow channel in the treatment tank is disposed so as to be blocked. A bar screen type comprising: a bar screen for catching garbage in running water; and a rake for meshing with the bar screen and moving along the bar screen to lift and discharge the garbage collected by the bar screen. A dust remover is installed.
This bar screen is constructed by arranging a plurality of flat steel bars (flat bars) of the same size adjacent to each other at equal intervals and fixing the front surface of the screen to be the same surface.

By the way, in sewage treatment plants and river effluent treatment plants, the inflowing waste flows down in a state where not only fine dust but also coarse waste is mixed. Therefore, the dust remover for removing coarse dust and the dust removal for removing fine dust are usually used. However, in addition to the dust remover main body, two additional facilities such as a transfer device are required, which increases the equipment cost.
In a small-scale sewage treatment plant or the like, there is a case where there is no room for installing two units, a dust remover for removing coarse dust and a dust remover for removing fine dust.
Therefore, the applicant of the present application uses a single bar screen dust remover to remove coarse dust and fine dust so that the equipment cost can be kept low and there is no room for installing two dust removers. A bar screen type dust remover combined with coarse dust and fine dust has been proposed (see Patent Document 1).
In this coarse dust / fine dust bar screen type dust remover, the rake operated along the bar screen is configured so that coarse dust and fine dust can be simultaneously swept up.

However, the rake suitable for coarse dust / fine dust combined bar screen type dust remover is composed of a coarse waste cleaning rake and a fine dust cleaning rake that are either worn or worn. In the case of damage, there is a problem that the entire rake needs to be replaced even if another rake is usable, resulting in a large economic loss.
Japanese Patent No. 3768518

  In view of the problems of the rake for the conventional coarse dust / fine dust bar screen type dust remover, the present invention adopts a simple dust rake that is easily worn or damaged. It is an object of the present invention to provide a rake apparatus that can perform repairing of a vehicle quickly, simply, and inexpensively.

  In order to achieve the above object, the rake device of the present invention has a rake arm for coarse dust formed on a rake body that can be attached to both ends of a rake arm that allows the rake device to move up and down along the bar screen, and for fine dust. It is characterized in that a rake for fine dust, in which a rake tooth piece is inserted and assembled, is detachably fixed to the rake body.

  In this case, the rake body can be configured such that attachment plates for attaching to other members are fixed to both ends of the rake body.

  Further, the fine rake can be arranged and fixed on the rake main body so as to follow the coarse trash teeth formed on one end edge of the rake main body.

  Further, a rake mounting groove for fine dust for attaching the rake for fine dust can be formed in the rake body.

  Also, the rake spacer for fine dust is inserted into the rake tooth piece for fine dust, the mounting bolt that penetrates between the rake tooth pieces for fine dust and is fixed to the rake spacer, and the rake body for fine dust The eyebolt can be configured to be fixed to the eyebolt.

  Further, the fine dust rake tooth piece can be configured by forming a bolt insertion hole for penetrating a mounting bolt inserted and fixed in the rake spacer.

  Further, the rake spacer can be formed by forming grooves for inserting fine rake tooth pieces at predetermined intervals.

  Further, the tip of the fine dust rake can be disposed so as to protrude from the tip of the coarse trash rake.

  According to the rake device of the present invention, the rake arm for coarse dust is formed on the rake body that can be attached to both ends of the rake arm that allows the rake device to move up and down along the bar screen, and the rake tooth piece for fine dust is inserted. By assembling the fine dust rake that is assembled into the rake body, it is possible to simplify the assembly and disassembly of the fine dust rake that is easily worn and damaged. Repair at the time of breakage can be performed quickly, simply and inexpensively.

  In addition, by constructing the rake body so that mounting plates for attaching to other members are fixed to both ends of the rake body, the rake device can be used to remove dust from either the intermittent drive type or the continuous drive type. It can be easily adopted in the machine.

  In addition, the rake body is more easily worn and damaged than the rake teeth for coarse dust by arranging the rake for fine dust along the coarse rake teeth formed on one edge of the rake body. Even if it is a fine dust rake, if some of the fine rake teeth are worn or damaged, it can be reused by replacing only the worn or broken fine rake teeth. It is more economical than the above, and since it can be easily assembled and disassembled, repair and inspection can also be performed quickly.

  In addition, by configuring the rake body to have a fine dust rake mounting groove for attaching a fine dust rake, the mounting position of the fine dust rake relative to the rake body can be set accurately, so the rake device can be easily Can be assembled with high accuracy.

  In addition, the rake spacer for fine dust, the rake spacer with fine dust rake teeth inserted, the mounting bolts that pass between the fine dust rake teeth and fixed to the rake spacer, and the rake body for fine dust The right and left side surfaces of the fine dust rake tooth piece are held by the insertion groove of the rake spacer, so that the fine dust rake tooth piece is manufactured using a thinner plate than before. However, the height of the tooth root can be increased (9 mm → 59 mm) compared to the conventional one, which can improve the cross-sectional performance of the tooth root and increase the strength. A rake can be assembled.

  In addition, by forming a bolt insertion hole for penetrating the mounting bolt that passes through the rake spacer in the fine dust rake tooth piece, even if there are many fine dust rake tooth pieces, By simply inserting the rake tooth piece into the mounting bolt, the tip of the tip surface can be easily aligned.

  In addition, by forming grooves for inserting fine rake tooth pieces at predetermined intervals in the rake spacer, it is possible to simply insert the fine rake tooth pieces into the insertion grooves, and thereby Since the width can be arranged at a predetermined interval, it is possible to manufacture fine dust rake tooth pieces using a thinner plate than before, and finer fine dust rakes can be assembled than before, making it easy for fine dust The rake can be assembled, and can be easily disassembled and assembled when the worn or damaged fine dust rake tooth piece is replaced.

  In addition, by arranging the tip of the fine dust rake teeth so that it protrudes beyond the tip of the coarse rake teeth, even if the coarse dust is captured by the bar screen, After scraping the coarse dust, fine dust captured by the bar screen will be scraped by the fine dust rake, and the fine dust rake piece manufactured using a thin plate material will not be damaged. A single rake device can simultaneously scrape and remove coarse dust and fine dust.

  Embodiments of a rake apparatus according to the present invention will be described below with reference to the drawings.

1 to 8 show an embodiment of a rake apparatus of the present invention.
In order to remove waste contained in sewage or wastewater to be treated in sewage or wastewater treatment at a sewage treatment plant or river wastewater treatment plant, there is no particular limitation. For example, as shown in FIGS. In addition, a bar screen type dust remover A is employed.
This bar screen type dust remover A is constituted by a bar screen B and a rake device C which is used for both coarse and fine dust, and shuts off a flow channel D in which the bar screen B is disposed in a part of the treatment tank. A rake device for both coarse and fine dust that is disposed in such a manner as to capture and remove the dust in the running water, and scrapes and discharges the dust (slag) captured by the bar screen B. C is arranged so as to mesh with the mesh widths W1 and W2 of the bar screen B and move upward.
Although the raising / lowering operation | movement along the bar screen B of this rake apparatus C is not specifically limited, For example, as shown in FIGS. 7-8, the intermittent drive type dust remover which attached the rake apparatus C is shown. Although the rake arm 4 is bent to drive intermittently and move up and down along the bar screen B, the dust remover can be a continuous drive type.

Further, the bar screen B of the bar screen type dust remover A is not particularly limited. For example, as shown in FIG. 7, the bar screen B1 for coarse dust and the bar screen B2 for fine dust are combined. The front end surface of the bar screen B1 for coarse dust is configured to protrude upstream from the front end surface of the bar screen B2 for fine dust.
Thereby, even if the waste flowing down is in a mixed state of coarse waste and fine dust, the coarse waste is first captured by the coarse waste bar screen B1 protruding upstream, and the flow resistance of the coarse waste is reduced. Is supported by the coarse dust bar screen B1, the fine dust bar screen B2 can be prevented from colliding with the coarse dust, and the thin dust screen bar can be prevented from being deformed. be able to.

The coarse waste bar screen B1 mainly captures coarse waste among the flowing down waste, and has a predetermined width, plate thickness, and length determined so as to have a strength necessary for catching the coarse waste. A plurality of thin strip-shaped flat steels (hereinafter referred to as “screen bars”) are arranged at equidistant mesh widths W1, and the mesh bars W1 of the screen bars have a predetermined size of falling waste ( Arranged at intervals that can capture (coarse dust).
The fine dust bar screen B2 is smaller than the plate thickness of the coarse dust screen bar within the mesh width W1 of the screen bar constituting the coarse dust bar screen B1, and the mesh width W2 is also small. A plurality of fine dust screen bars are arranged on the screen. In this case, the screen thickness of the fine dust screen bar is set to be as thin as possible so that the fine dust set in advance can be captured and the passage area of the screen can be made as wide as possible. Thus, the aperture ratio of the fine dust bar screen B2 can be improved.

  Further, the coarse screen and fine dust are arranged so as to move in mesh with the mesh width of the bar screen B, that is, the mesh width W1 of the coarse dust bar screen and the mesh width W2 of the fine dust bar screen. As shown in FIGS. 1 and 6, the rake device C directly forms the teeth of the coarse waste rake 3 that meshes with the coarse waste screen bar having a large mesh width on the rake body 1 side, and has a small mesh width. The fine rake 2 meshed with the fine dust screen bar is combined with the rake main body 1 in an insertable manner, and this is attached to the rake main body 1 with a fixture, not particularly limited. It is configured to be fixed so as to be integrated.

  The coarse trash / fine dust rake device C is not particularly limited. For example, as shown in FIG. 8, the tip of the rake arms 4, 4 of the dust remover that can be moved up and down along the bar screen is provided. The rake main body 1 is formed with a rake tooth for coarse dust at one end, and a fine dust rake 2 inserted into the rake main body 1 and assembled. To do.

As shown in FIGS. 1 to 3, the rake main body 1 is formed by bending a cross section of a steel plate having a required thickness into a deformed square shape, the main body piece 11 is horizontal, and mounting plates 15 are attached to both ends. A mounting bolt hole 15a for attaching a rake arm to this is drilled, and the mounting piece 12 is bent at a required angle with respect to the main body piece 11, and at the leading edge of the mounting piece 12, A portion at a screen bar position of the coarse dust bar screen B1, for example, a regular interval so as to be equal to the mesh width W1 of the coarse dust bar screen, and the tip end surface of the coarse dust bar screen bar is inserted a little. The fine dust rake mounting piece 14 is formed by engraving grooves 13 and 13, forming the gap between the grooves 13 and 13 to be the teeth of the coarse dust rake 3, and L-shaped on the back side of the mounting piece 12. And projecting. As a result, the rear surface of the attachment piece 12 and the fine dust rake attachment piece 14 form a fine dust rake attachment groove 10 having a U-shaped cross section, and the base end side of the fine dust rake 2 can be inserted and fixed thereto. To.
Also, the fine dust rake mounting piece 14 is provided with bolt holes 14a for fixing the fine dust rake 2 on the rake body 1 side at predetermined intervals, and in order to reinforce this, the fine dust rake mounting piece 14 is provided. On the back side of the piece 14, a reinforcing plate 16 is integrated with the rake body 1 by welding or the like so as to be along the back side of the attachment piece 12 and the back side of the fine dust rake attachment piece 14.

As shown in FIGS. 4 to 6, the fine dust rake 2 is not limited to a steel plate having a suitable thickness as the fine dust rake 2, as with the rake body 1. As shown in FIG. 5, using a thin steel plate of about 9 mm that could not be manufactured from this point, it can be inserted into the screen width W2 of the screen bar of the fine dust bar screen B2, and the captured fine dust can be lifted and discharged. A plurality of fine dust rake teeth 20 formed by cutting into a shape and the base end portion of the plurality of fine dust rake teeth 20 become the screen width W2 of the screen bar of the fine dust bar screen B2. A rake spacer 21 that can be inserted and assembled in this manner, and a mounting bolt 22 that is inserted into the rake spacer 21 bent in a U-shaped cross section and fixes a plurality of fine dust rake teeth 20 at regular intervals. This configuration Fixture 23 and to fit latching the bolt 22, for example, fine dust rake 2 through the eye bolt to be fixed to the rake body 1.
Even if the fine rake tooth piece 20 is made of a thin steel plate by inserting the base end portion of the fine rake tooth piece 20 into the groove 21a formed at regular intervals in the rake spacer 21, each fine rake tooth piece 20 is made of thin steel plate. Since both sides of the dust rake tooth piece 20 are held one by one by the insertion groove 21a, the dust rake tooth piece 20 is prevented from being deformed or distorted even with respect to the load applied to the fine dust rake tooth piece 20. , It can be a strong dust rake.

As shown in FIG. 4, the rake spacer 21 is provided with grooves 21a and 21a for insertion of fine dust rake tooth pieces. The interval between the grooves 21a is the same as that of the screen bar of the fine dust bar screen B2. Although it is determined so as to have the mesh width W2, as shown in FIG. 6, the grooves 21a are not formed at the positions of the teeth of the coarse dirt rake 3.
The mounting bolt 22 is set slightly longer than the overall length of the rake spacer 21, and the nut 22N is screwed into the screw portions formed at both ends so that the rake spacer 21 and the plurality of fine dust rake teeth 20 are integrated. In addition, a fitting 23 such as an eyebolt is inserted into the mounting bolt 22 at regular intervals. A fixing nut 23N is screwed onto the eyebolt.
As shown in FIG. 5, when the fine rake tooth piece 20 is fixed to the rake body 1 via a fitting 23 such as an eyebolt and a nut 23N, as shown in FIG. The locking step 20a is formed so as to be locked to the distal end edge of the mounting piece 12 of the rake body 1 so that the tooth tip length of 20 becomes constant and can be latched and fixed at the set position with high accuracy. As a result, the locking step 20a of the fine dust rake tooth piece 20 abuts and locks with the tip edge of the attachment piece 12 of the rake body 1 so that the positioning can be accurately performed. The leading edge of the tooth tip 20c can be reliably aligned.

Next, the assembly sequence of the rake apparatus C that is used for both coarse and fine dust will be described.
First, the assembly of the fine dust rake 2 will be described. As shown in FIG. 2, the base end portions of the plurality of fine dust rake tooth pieces 20 are inserted into the fine dust rake tooth piece insertion grooves 21 a of the rake spacer 21. At this time, the mounting bolts 22 are inserted into the bolt holes 20b drilled on the base side of each fine dust rake tooth piece 20. In this case, for each predetermined number of fine dust rake tooth pieces 20, The fitting 23 such as an eyebolt is inserted into the mounting bolt 22 so as to match the mounting position where the bolt hole 14a is formed. Then, after inserting a predetermined number of fine dust rake tooth pieces 20 into the grooves 21a for inserting all fine dust rake tooth pieces of the rake spacer 21, nuts 22N are screwed onto both ends of the mounting bolts 22. The rake spacer 21 and the all fine dust rake tooth pieces 20 are integrated, and the assembly of the fine dust rake 2 provided with the fixture 23 is completed.
Next, the fine dust rake 2 and the separately manufactured rake body 1 are assembled. This is because the fitting 23 such as an eyebolt inserted into the attachment bolt 22 of the fine dust rake 2 is inserted into the bolt hole 14a formed in the fine dust rake attachment piece 14 and the rake spacer 21 and the fine rake. The base side of the dust rake tooth piece 20 is inserted into the fine dust rake mounting groove 10, and the fitting 23 such as the eyebolt is inserted into the bolt hole 14a of the fine dust rake mounting piece 14, and then the nut 23N is inserted therein. Are screwed together so that the fine dust rake 2 is integrally fixed to the rake body 1 and the rake device C is formed.
When the assembled rake device C is fixed to the tip of the rake arm 4, it is fixed to the tip of the rake arm 4 via a bolt nut in the bolt hole 15a of the mounting plate 15 drilled in the mounting piece of the rake body 1. To do. The mounting plate 15 is welded to both end portions of the mounting piece 12 of the rake body 1.
In this case, in order to reinforce the mounting plate 15, the reinforcing plate 17 is welded along the back surface of the mounting plate 15 and the back surface of the main body piece 11 of the rake body 1 as shown in FIGS.

When a part of the fine dust rake tooth piece 20 is worn or damaged due to use, the fine dust rake can be reused by replacing the worn or damaged fine dust rake tooth piece 20. This is because the fine dust rake 2 is removed from the rake main body 1 by loosening and removing the nut 23N screwed to the fixture 23 such as an eyebolt that fixes the fine dust rake 2 to the rake main body 1. be able to.
Next, when the nut 22N screwed to both ends of the mounting bolt 22 is removed, the mounting bolt 22 penetrating the fine dust rake tooth piece 20 can be extracted. With the mounting bolt 22 removed, the worn or damaged fine dust rake tooth piece 20 is replaced with a new one and assembled in the same manner, so that it can be used again as a rake device C for both coarse dust and fine dust. it can.
As a result, the coarse dust / fine dust combined rake can be used again.

  As mentioned above, although the rake device of the present invention has been described based on the embodiment thereof, the present invention is not limited to the configuration described in the embodiment, and for example, a single rake other than the coarse dust / fine dust combined rake The configuration can be changed as appropriate without departing from the spirit of the invention, such as being applicable to a rake of the mesh width.

  The rake device of the present invention has a characteristic that it can be repaired quickly and easily at low cost when it is worn or damaged by making the fine dust rake a simple assembly type. In addition to being suitable for use in other dust removal equipment, it can also be used in, for example, river dust removal equipment and industrial / food-related dust removal equipment.

It is a side view which shows one Example of the rake apparatus of this invention. It is assembly explanatory drawing of a rake apparatus. A rake body is shown, (A) is a top view, (B) is a front view, (C) is a back view, and (D) is a sectional view. The rake spacer is shown, (A) is a plan view, (B) is a front view, and (C) is a side sectional view. It is explanatory drawing which shows the rake tooth piece for fine dust. FIG. 3 is a cross-sectional explanatory diagram in which the rake device of the present invention is combined with a bar screen for both coarse dust and fine dust. It is a side view which shows the bar screen type dust remover installed in the water channel. A bar screen type dust remover is shown, (A) is a top view, (B) is a front view.

Explanation of symbols

A Bar screen type dust remover B Bar screen C Rake for coarse and fine dust (rake device)
D Flow channel arranged in a part of the treatment tank B1 Bar screen for coarse dust B2 Bar screen for fine dust 1 Rake body 10 Fine rake mounting groove 11 Main body piece 12 Mounting piece 13 Groove 14 Fine dust rake mounting piece 15 Mounting plate (for mounting rake arm)
15a Bolt hole (for mounting rake arm)
16 Reinforcement plate (for reinforcing rake mounting piece for fine dust)
17 Reinforcing plate (for reinforcing mounting plate)
2 Fine Dust Rake 20 Fine Dust Rake Teeth 20a Locking Step 20b Bolt Hole 21 Rake Spacer 21a Groove 21b Bolt Hole 22 Mounting Bolt 23 Fixing Tool (Eye Bolt)
3 Rake for coarse waste 4 Rake arm

Claims (8)

  The rake body, which allows the rake arm to be moved up and down along the bar screen, is integrally formed with the rake teeth for coarse dust and the rake teeth for fine dust are assembled and assembled. A rake device characterized in that it is configured to be detachably fixed to the rake body.   2. The rake apparatus according to claim 1, wherein the rake body is configured such that attachment plates for attaching to other members are fixed to both ends of the rake body.   The rake device according to claim 1 or 2, wherein a rake for fine dust is arranged and fixed on the rake body along the coarse rake teeth formed on one end edge of the rake body.   4. The rake device according to claim 1, wherein the rake body is formed by forming a fine dust rake mounting groove for mounting the fine dust rake.   A rake spacer with a fine dust rake tooth piece inserted into the rake spacer, a mounting bolt that passes between the fine dust rake tooth pieces and is fixed to the rake spacer, and a fine dust rake is fixed to the rake body. The rake device according to claim 1, wherein the rake device is configured by a mounting fixture.   6. The rake device according to claim 1 or 5, wherein a bolt insertion hole is formed in the fine dust rake tooth piece to penetrate a mounting bolt that is inserted and fixed in the rake spacer.   The rake device according to claim 5 or 6, wherein grooves for inserting fine dust rake tooth pieces are formed in the rake spacer at predetermined intervals.   The rake device according to claim 1, 2, 3, 4, 5 or 6, wherein the tip of the fine rake teeth is disposed so as to protrude from the tip of the coarse dust rake.

Images