JP2019093386A - Crusher - Google Patents

Abstract

To provide a crusher to be installed in a water passage capable of suppressing deformation of a screen caused by gradual bending of a screen bar by self weight, the deformation being prevalent among conventional crushers.SOLUTION: A crusher is equipped with a screen 1 for collecting contaminants in water to be treated, a crushing unit for crushing the contaminants, and a raking unit for raking the contaminants collected by the screen 1 to the crushing unit. The screen 1 is composed of plate members 11 having slits 12 formed in the nearly horizontal direction and a collecting unit 13 formed above and below the slits for collecting the contaminants.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a crushing apparatus installed in a water channel of a sewage treatment plant or the like for crushing contaminants such as sediment floating in water.

  In a water channel of a sewage treatment plant or the like, a crusher is installed to crush foreign matter such as sediment floating in water. The crusher installed in the water channel includes a crusher for crushing foreign matter, a screen for capturing foreign matter, and a scraper for scraping the foreign matter trapped on the screen to the crusher. Being equipped, it is possible to capture and break up contaminants across the entire width of the water channel.

  For example, in Patent Document 1, in a cross-scratch type dust remover installed in a sewage treatment plant or the like, a cross-sliding type screen in which horizontal screen bars extended obliquely to the water flow direction are juxtaposed in the vertical direction And an arrangement comprising a debris crusher downstream of the gap formed between the downstream end of the screen and the side wall of the water channel.

JP, 2011-52451, A

In a conventional crushing apparatus installed in a water channel, as described in Patent Document 1, a screen portion is formed by arranging horizontal screen bars in the vertical direction.
However, such a horizontal screen bar has a problem that the screen is deformed due to a gradual deflection due to its own weight.
Therefore, this invention aims at suppressing the deformation | transformation of the screen by the bending of a screen bar in the crushing apparatus installed in a water channel.

As a result of intensive studies on these problems, the inventor of the present invention suppresses deformation of the screen by configuring a screen for capturing contaminants in the water to be treated with a plate member having slits formed in a substantially horizontal direction. It has been found that the present invention is completed.
Specifically, the present invention provides the following crushing apparatus.

  The present invention for solving the above-mentioned problems comprises a screen for collecting contaminants in the water to be treated, a crushing part for crushing contaminants, and a scraper for scraping the contaminants collected by the screen to the crushing part A crusher comprising: a slit, wherein the screen is formed in a substantially horizontal direction, and a collector which is formed above and below the slit and collects the foreign matter It is a crushing apparatus characterized by comprising a plate member.

In the present invention, since the thickness of the screen is reduced by forming the screen with a plate member, the weight can be reduced and deflection due to its own weight can be prevented.
Moreover, in the screen by the conventional screen bar, in order to laminate | stack a several screen bar, the assembly operation was complicated, but, in the crushing apparatus of this invention, a screen part is easily installed by attaching one plate member. It also has the effect of being able to

Furthermore, the present invention is characterized in that the plate member is made of steel having a thickness of 10 to 20 mm, and the length in the height direction of the collecting portion is 10 to 20 mm.
Since the screen is installed to oppose the flow of the treated water, the screen is required to have a strength to withstand the flow pressure of the treated water. Further, since the contaminants such as the residue include those of high hardness such as wood chips and stones, when the contaminants collide, there is a possibility that the collecting portion may be deformed.
By using a steel material with a thickness of 10 to 20 mm as the plate member and setting the length in the height direction of the collection portion to 10 to 20 mm, the collector can withstand the water flow pressure of the water to be treated, and further, collision of foreign matter Can also form a screen that can withstand.

Furthermore, the present invention is characterized in that the screen has an arc portion extending to the downstream side of the center of the scraping portion.
Contaminants collected on the screen move along the outer peripheral surface of the screen by the scraping portion, so that water flows along the shape of the screen on the outer peripheral side of the screen. Thus, when the screen has a circular arc, a swirling flow is formed along the circular arc.
Furthermore, in the above feature, the arc portion of the screen extends to the downstream side of the center of the scraping portion. As a result, on the downstream side of the center of the scraping portion, an arc portion extending toward the center of the water channel of the water to be treated is formed. Therefore, on the downstream side of the center of the scraping portion, a swirling flow is formed from the side wall of the water channel toward the center of the water channel, and foreign substances staying in the vicinity of the side wall of the water channel are directed toward the crushing portion installed on the center of the water channel It plays an effect.

  According to the crushing apparatus of the present invention, in the crushing apparatus installed in the water channel, it is possible to suppress the deformation of the screen due to the deflection of the screen bar.

FIG. 1 is a schematic explanatory view showing the structure of a crushing apparatus according to a first embodiment of the present invention. FIG. 2 is a schematic explanatory view showing the structure of a screen used in the crushing apparatus of the first embodiment of the present invention. FIG. 2A is a perspective view of the screen according to the first embodiment of the present invention as viewed from the X direction in FIG. FIG. 2 (B) is an enlarged view of a portion shown by a circle in FIG. 2 (A). FIG. 3 is a schematic explanatory view for explaining the shape of the screen of the first embodiment of the present invention. FIG. 4 is a schematic explanatory view showing the structure of a screen used in the crushing apparatus of the second embodiment of the present invention. FIG. 5 is a schematic explanatory view showing the structure of the crushing apparatus of the third embodiment of the present invention. FIG. 6 is a schematic explanatory view showing the structure of a crushing apparatus according to a fourth embodiment of the present invention.

Hereinafter, an embodiment of a crushing apparatus according to the present invention will be described in detail with reference to the drawings.
The shredding device of the present invention is installed in a water channel and used to crush contaminants in treated water flowing in the water channel. For example, the water channel is a settling tank or the like of a sewage treatment plant, and the impurities include sediments and the like contained in sewage such as sewage.

(First embodiment)
FIG. 1 is a schematic explanatory view showing the structure of a crushing apparatus according to a first embodiment of the present invention. In the crushing apparatus of the first embodiment of the present invention, the screen 1 for capturing the foreign matter G contained in the water to be treated flowing through the water channel R, and the foreign matter G captured in the screen 1 is scraped to the crushing part 3 The scraping part 2 for the purpose and the crushing part 3 for crushing the foreign matter G are provided.

  As shown in FIG. 1, the screen 1 is installed across from the side wall R1 to the vicinity of the side wall R2 of the water channel R, and the crushing portion 3 is installed on the downstream side of the gap between the screen 1 and the side wall R2. There is. In addition, the scraping unit 2 is provided on the downstream side of the screen 1 and includes a rake 21 that revolves around a rotating shaft 22. The rake 21 has a function of scraping the foreign matter G captured by the screen 1 through the slits 12 formed in the screen 1 and transferring it to the crushing unit 3.

[screen]
The screen 1 according to the first embodiment of the present invention is formed of a plate member having an arc portion formed substantially at the center, fixed at one end side of the plate member to the side wall R1 of the water channel R, and installed to cross near the side wall R2. It is done. The other end side of the plate member is fixed to the side surface of the casing at the water channel center side of the crushing unit 3. The means for fixing the screen 1 to the water channel R is not particularly limited. For example, the means for fixing the screen 1 to the water passage R may be fixed to a box or the like surrounding the scraping portion 2 and the crushing portion 3.

FIG. 2A is a perspective view of the screen 1 according to the first embodiment of the present invention as viewed from the X direction in FIG. As shown in FIG. 2, in the screen 1, slits 12 in a substantially horizontal direction are formed in the plate member 11. A plurality of slits 12 are provided in the height direction, and the plurality of slits 12 are arranged in parallel at equal intervals. Moreover, the collection | recovery part 13 for trapping the foreign material G is provided in the upper part and lower part of the slit 12. FIG.
As described above, in the crushing apparatus of the present invention, the thickness of the screen 1 can be reduced by using the plate member 11, so that the weight can be reduced and the deflection due to its own weight can be prevented.

  In the screen 1 of the first embodiment, a plurality of slits 12 are formed for one plate member 11, but the number of slits is not limited. For example, only one slit may be formed in one plate member. Also, a screen provided with a plurality of slits may be configured by arranging and attaching a plurality of plate members in which only a single slit is formed, but from the viewpoint of mounting work, a plurality of slits are formed in a single plate member It is preferable to do.

  The slits 12 are configured to transmit the water to be treated without passing the trapped contaminants G. Therefore, the width of the slit 12 (see (c) in FIG. 2B) is appropriately designed according to the size of the foreign matter G to be captured, but is preferably 10 mm or more. If it is less than 10 mm, the resistance to permeation of the water to be treated becomes large, and therefore the load from the flow of the water to be treated is applied to the plate member 11, and the plate member may be deformed.

The length in the height direction of the collection portion 13 (see (b) in FIG. 2B) is not particularly limited, but is preferably 10 to 20 mm. If it is less than 10 mm, the strength of the plate member in the collection unit 13 is weakened, and therefore, there is a risk of deformation due to the load of the water flow pressure of the water to be treated or the collision of contaminants such as sediment. On the other hand, when it exceeds 20 mm, the pressure received from the water flow of the water to be treated is increased, and the load of the water flow pressure is also increased. Therefore, it is necessary to increase the thickness by increasing the thickness of the plate member, which is disadvantageous in slit forming processing.
In the first embodiment, the lengths in the height direction of the collecting portion 13 between the adjacent slits 12 are formed to be equal to each other, but the length is not particularly limited, and it is not uniform. May be.

Any material may be used as the plate member 11. For example, steel materials, aluminum materials, plastic materials, stone materials and the like can be mentioned. It is preferable to use a steel material from the viewpoint of processing suitability and strength.
Furthermore, since the plate member 11 is used in water, it is preferable to carry out anticorrosion coating.

  Although the thickness of the plate member 11 is suitably set as needed, it is preferably 10 to 20 mm. If it is less than 10 mm, the strength becomes weak, and there is a risk of deformation due to the water flow pressure of the water to be treated or the collision of foreign substances such as sediment. On the other hand, when it exceeds 20 mm, since it is necessary to dig deeply when forming the slit 12, it is not excellent in processability.

  The shape of the plate member 11 may be any shape, as in the first embodiment, in addition to a shape having an arc portion substantially at the center of the plate member 11, a linear shape or in the flow direction of the water to be treated It may be a refracted shape.

  FIG. 3 is a schematic explanatory view for explaining the shape of the screen 1 according to the first embodiment of the present invention. As shown in FIG. 3, the screen 1 includes an arc portion 14 substantially at the center of the plate member 11 and straight portions 15 and 16 at both ends thereof. Further, the screen 1 is installed so that the linear portion 15 side of the arc portion 14 extends to the downstream side of the center of the scraping portion 2. The downstream side of the center of the scraping portion 2 means downstream of the rotary shaft 22 of the rake 21 rotated along the arc portion 14.

When the arc portion 14 extends to the downstream side of the center of the scraping portion 2, the foreign matter G scraped by the rake 21 moves along the outer periphery of the arc portion 14, so that a swirling flow flows around the screen 1. Form Therefore, a water flow F is generated from the side wall R2 toward the center side direction of the water channel R, and the foreign matter G staying in the vicinity of the R2 side surface can be strongly induced in the crushing portion 3 direction.
Although the screen 1 according to the first embodiment includes the arc portion 14 formed along a regular circle (broken line), the screen 1 is directed toward the center side of the water channel R at the downstream side of the center of the scraping portion 2 It is sufficient if it is a curved portion that is stretched.

  Moreover, it is preferable to extend | stretch the arc part 14 to the position of 20 degrees or more from the surface perpendicular | vertical with respect to the flow of to-be-processed water through the rotating shaft 22 of the scraping part 2, and extends to the position of 30 degrees or more Are particularly preferred (see .theta. For the angles). By setting it as 20 degrees or more, the water flow F which goes to the center side direction of the water channel R from the side wall R2 can be formed reliably.

Furthermore, the intersection point Q of the outer circumferential surface of the screen 1 and the rake track P (one-dot chain line) drawn by the rake 21 of the scraping portion 2 rotating is 20 to 70 ° from the plane perpendicular to the flow of the water to be treated. It is preferable to be configured to be in position, more preferably 30 to 60 °.
The foreign matter G scraped by the rake 21 is peeled off at the intersection point Q between the outer peripheral surface of the screen 1 and the rake track P, and flows into the crushing unit 3 to be broken. If the position of the intersection point Q is less than 20 °, the foreign matter G separated from the rake 21 moves to the side wall R2 side (front view right direction) by the centrifugal force of the rake 21, so the fractured portion 3 smoothly. May not flow into Also, if it exceeds 70 °, there is a possibility that the removed contaminants G move in the direction of the side wall R1 (front direction left direction), and the inflow to the crushing part 3 may be inhibited.

[Rearing part]
The raking unit 2 according to the first embodiment of the present invention includes a rotating shaft 22 and a rake 21 radially attached from the rotating shaft 22. The rake 21 is a plate blade having a thickness capable of passing through the slits 12 of the screen 1, and the rake 21 of the same number as the slits 12 of the screen 1 is juxtaposed in the height direction in the scraping portion 2.
The rake 21 transfers the contaminants G which are projected from the slits 12 of the screen 1 and captured by the screen 1 while circling the rotation axis, and the contaminants G transferred when the rake 21 is accommodated in the screen 1. Repeat the action of peeling off. The removed contaminants G flow into the crushing unit 3 along with the flow of the water to be treated and are broken.

The scraping portion according to the present invention may have any configuration as long as the contaminants G captured by the screen 1 can be transferred to the crushing portion, and can be appropriately designed according to the shape of the screen 1. For example, in addition to the configuration of the scraping unit 2 of the first embodiment, there is a configuration including a chain attached with a rake, and a plurality of sprockets for circulating the chain.
Like the scraping portion 2 of the first embodiment, the scraping portion constituted by the rotary shaft 22 and the rake 21 attached radially from the rotary shaft 22 does not have a structure that meshes with a chain and a sprocket, Since it is a simple structure, there is an advantage that it is hard to produce troubles, such as a foreign matter being entangled in scraping part 2. As shown in FIG.

[Crushing section]
The crushing unit 3 of the first embodiment of the present invention is a vertical twin-screw crusher. As a crushing part of this invention, what kind of crusher may be sufficient, for example, a horizontal crusher may be sufficient. It is preferable to use a vertical crusher because the crusher can be provided uniformly in the height direction of the screen 1.

  In the present invention, the crushing unit 3 is preferably installed near the position of the intersection point Q between the outer peripheral surface of the screen 1 and the rake track P. As a result, the contaminants G separated from the rake 21 can smoothly flow into the crushing unit 3.

Second Embodiment
FIG. 4 is a schematic explanatory view showing the structure of the screen 1 used in the crushing apparatus of the second embodiment of the present invention.
In the crushing apparatus of the second embodiment, two screens 1 are attached vertically. The other configuration is the same as that of the first embodiment.

  As in the second embodiment, the screen 1 can be configured by a plurality of plate members 11. In the case of being configured by a plurality of plate members 11, the weight of the screen component can be reduced, and hence the mounting operation becomes easy. In addition, when making the screen 1 into multiple sheets, a clearance gap may be opened between the screens 1, and this clearance gap can also be made to act similarly to the slit 12. FIG.

Third Embodiment
FIG. 5 is a schematic explanatory view showing the structure of the crushing apparatus of the third embodiment of the present invention.
The crushing apparatus of the third embodiment has a configuration provided with a linear screen 4 installed obliquely in the downstream direction.
As in the first embodiment, the screen 4 is formed of a plate member in which a plurality of slits in the substantially horizontal direction are arranged in parallel in the height direction.

The rake 53 is also provided with a chain 52 to which the rake 53 is attached, and a scraping portion 5 having two sprockets 51 a and 51 b for driving the chain 52.
As in the third embodiment, in the crushing apparatus provided with the scraping portion 5 using the chain and the plurality of sprockets, the water channel R can be installed regardless of the size of the width. Therefore, it is a crushing apparatus suitable when installing in the large channel R of width.

Fourth Embodiment
FIG. 6 is a schematic explanatory view showing the structure of a crushing apparatus according to a fourth embodiment of the present invention.
In the crushing apparatus of the fourth embodiment, in the crushing apparatus of the third embodiment, a screen 6 having a linear portion and a curved portion is provided in place of the linear screen 4.
As in the first embodiment, the screen 6 is constituted by a plate member in which a plurality of slits in the substantially horizontal direction are arranged in parallel in the height direction.

  Further, the curved portion extends to the downstream side of the center of the sprocket 51b, and the water flow F from the side wall R2 toward the center side of the water channel R is generated similarly to the first embodiment and stagnates near the R2 side surface Contaminants G can be strongly induced in the crushing portion 3 direction.

  The crushing apparatus of the present invention can be used as a crushing apparatus for crushing contaminants in treated water flowing in a water channel. Specifically, for example, in a sedimentation tank of a sewage treatment plant, it can be used as a crushing apparatus for capturing and crushing sediment as foreign matter.

  Moreover, it is also possible to distribute | circulate the screen attached to the crushing apparatus of this invention as a screen component. Thereby, the crushing apparatus of this invention can be comprised using the existing crushing apparatus.

  Reference Signs List 1 screen, 11 plate members, 12 slits, 13 collecting portions, 14 arc portions, 15, 16 straight portions, 2 scraping portions, 21 rake, 22 rotating shafts, 3 crushing portions, 4 screens, 5 scraping portions, 51a Sprocket, 51b Sprocket, 52 chain, 53 rake, R channel, R1 side wall, R2 side wall, G foreign matter, F water flow, P rake track, Q intersection

The crusher installed in the water channel and equipped with a screen to capture foreign matter It is required to lead to the crusher.
  Therefore, an object of the present invention is to provide a screen installed in a water channel for capturing foreign matter. Crusher, which prevents foreign matter from depositing on the The present invention provides a crushing apparatus capable of guiding contaminants to the crushing part.

The present inventors have conducted intensive studies and as a result these issues, a screen, by placement in a particular location, contaminants contaminants to suppress efficiently broken 砕部 to be deposited into the crushing unit and around the screen It has been found that the present invention is derived .
Specifically, the present invention provides the following crushing apparatus.

  The crushing apparatus of the present invention for solving the above problems comprises a screen for collecting contaminants in the water to be treated, a crushing part for crushing contaminants, and the contaminants collected by the screen.By rakeA crusher provided with a scraping unit that scrapes the crusherInThe screen is It is installed toward the crushing part from the side wall of the water channel of the treated water, and the side wall of the screen The side end is disposed at the most upstream side of the flow of the water to be treated, and the screen is the end on the side wall Are disposed only in the flow direction of the water to be treated, and the side wall side end of the screen is It is special to be placed downstream of the most upstream end of the flow of treated water on the rake track drawn by the rake. It is a reward.

According to the present invention, on the downstream side of the center of the scraping portion, the side wall of the water channel is rotated from the side wall of the water channel toward the center of the water channel. Circulating flow is formed, and the foreign matter staying near the side wall of the water channel is It has the effect of guiding in a direction.

Furthermore, according to one embodiment of the crushing apparatus of the present invention, the crushing part comprises the outer peripheral surface of the screen and the rake. It has the feature of being installed near the position of the intersection with the track.
As a result, the contaminants separated from the rake can smoothly flow into the crushing portion.

According to the present invention, a shredder mounted in a water channel and equipped with a screen for capturing contaminants To prevent debris from depositing around the fractured part and on the screen, and efficiently to the fractured part It is possible to provide a crusher capable of inducing contaminants.

Claims (3)

A screen for collecting contaminants in the water to be treated;
A crushing unit for crushing the foreign matter,
And c) a scraping unit for scraping the foreign matter collected by the screen to the crushing section.
The shredding device is characterized in that the screen comprises a slit formed in a substantially horizontal direction, and a plate member formed on the upper and lower sides of the slit and having a collection portion for collecting the foreign matter. The plate member is made of steel having a thickness of 10 to 20 mm,
The crushing apparatus according to claim 1, wherein a length in a height direction of the collection portion is 10 to 20 mm. The shredding device according to claim 1, wherein the screen has an arc portion extending to the downstream side of the center of the scraping portion.

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