JP2018094492A - Processing device for concrete mass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing device for a concrete mass capable of manufacturing a high-quality recycled aggregate by reliably recovering an aggregate from a concrete mass.SOLUTION: A processing device for a concrete mass is a jaw crusher type processing device, and comprises a fixed jaw 2 having a fixed tooth 22 attached inside and a swing jaw 3 having a movable tooth 32 attached inside. A substantially V-shaped processing chamber 4 is constituted by the fixed tooth 22 and the movable tooth 32, and upper and lower ends of the processing chamber 4 respectively serve as a supply port 41 and a discharge port. A lower end of the swing jaw 3 is energized in a direction away from the fixed jaw 2 by energization means, and is rockably supported on the body frame side via a toggle plate. An upper end of the swing jaw 3 is rotatably installed via a bearing 8 on an eccentric shaft 7, which is rotated via a driving mechanism. An eccentric quantity Lg of the eccentric shaft 7 is set to 10-15% of an average opening quantity Lof the supply port 41.SELECTED DRAWING: Figure 1

Description

The present invention relates to a concrete lump processing apparatus, and more particularly, to a jaw crusher type processing apparatus for recovering aggregate from a concrete lump generated in a demolition work of a structure or the like.

  Conventionally, the concrete waste generated in the demolition work of structures, etc. has been crushed into concrete blocks and reused as roadbed materials and backfill materials. Techniques have been proposed for collecting and reclaiming the aggregates contained in the. In the regeneration of the aggregate from the concrete block, for example, after crushing the concrete block with a jaw crusher, it is sorted into a sand cement portion having a diameter of less than 5 mm and a gravel crushed stone portion having a diameter of 5 mm or more using a vibration sieve, Furthermore, each of these is subjected to a grinding process by a grinding machine, whereby the mortar is separated from the sand cement component to recover the sand, and the mortar is separated from the gravel component to collect the gravel crushed stone (Patent Document 1). .

  The above-mentioned jaw crusher is originally a known crushing device for crushing rocks and ores, and a fixed jaw fixed to a main body frame and provided with substantially flat fixed teeth inside, and the fixed A swing jaw disposed opposite to the jaw and provided with a substantially flat plate-like moving tooth on the inside, and a substantially V-shaped crushing chamber (processing chamber) when viewed from the side with the fixed tooth and the moving tooth. The upper and lower ends of the crushing chamber are configured as a supply port and a discharge port, respectively, and the lower end portion of the swing jaw is supported on the main body frame side so as to be swingable via a toggle plate. The upper end of the shaft is attached to an eccentric shaft that is installed in the horizontal direction and is rotated by a drive source via a bearing. Therefore, in the jaw crusher, the rotation of the eccentric shaft causes the upper end side of the moving tooth to perform a circular motion when viewed from the side, and the lower end side of the moving tooth swings up and down in an arc shape and moves relative to the fixed tooth. Since the teeth repeatedly approach and separate, the object to be processed in the crushing chamber can be crushed (Patent Documents 2 and 3).

JP-A-8-245248 JP-A-6-238179 JP 2007-268396 A

  By the way, the jaw crusher is a device used for crushing rocks and ores whose individual hardness is relatively approximate, and crushes a concrete lump composed of high-hardness aggregate and cement with high adhesive strength with a jaw crusher. In this case, although the concrete block itself can be crushed, the resulting coarse aggregate has a large amount of mortar components adhering, and the fine aggregate is in a state of agglomerating into mortar granules, which is similar to the above-described aggregate regeneration technology. In addition, it is necessary to further remove the mortar component by performing a grinding process or the like, and in fact, the aggregate cannot be sufficiently recovered from the concrete block.

  The present invention has been made in view of the above circumstances, and its purpose is to reliably recover aggregates from concrete blocks generated in the demolition work of structures and the like, and to produce high-quality recycled aggregates. An object of the present invention is to provide a concrete lump processing apparatus.

  In order to solve the above-mentioned problems, the present inventors have made various investigations focusing on the crushing action of the jaw crusher used for crushing rocks and ores and the properties of the concrete lump. If a concrete granular material, that is, a coarse aggregate to which a mortar component is adhered and a fine aggregate aggregated with a cement component are obtained, and then this is further agitated and contacted with each other, and processed so as to disentangle the coarse aggregate, It was known that fine aggregates and cement components can be separated. In the jaw crusher, the average opening amount of the supply port (the average separation distance between the upper end of the fixed jaw and the upper end of the swing jaw) and the eccentric amount of the eccentric shaft that moves the swing jaw (from the center of rotation of the eccentric shaft If the distance to the center is set to a specific relationship, it is surprising that the above-mentioned unceasing action can be exerted without crushing the aggregate itself. Knowing that coarse and fine aggregates can be obtained, the present invention has been completed.

  That is, the gist of the present invention is a jaw crusher-type concrete lump processing apparatus for recovering aggregate from a concrete lump, which is fixed to a main body frame and has a substantially flat fixed tooth attached inside. A processing chamber having a substantially V-shape when viewed from the side with a fixed tooth and a moving tooth, comprising a jaw and a swing jaw disposed opposite to the fixed jaw and provided with a substantially flat moving tooth on the inside. And the upper and lower ends of the processing chamber are a supply port and a discharge port, respectively, and the lower end portion of the swing jaw is urged in a direction away from the fixed jaw by the urging means and is shaken via the toggle plate. The upper end of the swing jaw is supported by the main body frame so as to be movable, and is attached to an eccentric shaft that is installed in a horizontal direction and is rotated by a drive mechanism via a bearing. Te, eccentricity of the eccentric shaft lies in the processing apparatus of the concrete mass, characterized in that it is set to 10-15% of the average opening ratio of the supply port.

  According to the concrete lump processing apparatus according to the present invention, the eccentric amount of the eccentric shaft is set to a specific ratio with respect to the average opening amount of the supply port, and the operating range of the moving teeth that moves toward and away from the fixed teeth. Since it is larger than the conventional jaw crusher and in a predetermined range, in the processing chamber, the concrete lump can be agitated and contacted with each other, while crushing the concrete lump. Aggregates can be separated from cement components, aggregates in concrete can be reliably recovered, and high-quality recycled aggregates can be produced.

It is the longitudinal cross-sectional view seen from the side surface which shows the structure of the principal part of the processing apparatus of the concrete lump which concerns on this invention. It is the longitudinal cross-sectional view seen from the side surface which shows the whole structure of the processing apparatus of the concrete lump which concerns on this invention, and is a figure which shows the state which the moving tooth approached with respect to the fixed tooth. It is the longitudinal cross-sectional view seen from the side surface which shows the whole structure of the processing apparatus of the concrete lump which concerns on this invention, and is a figure which shows the state which the moving tooth spaced apart with respect to the fixed tooth.

  An embodiment of a concrete lump treatment apparatus (hereinafter abbreviated as “treatment apparatus”) according to the present invention will be described with reference to the drawings. As shown in FIGS. 2 and 3, the processing apparatus of the present invention is a jaw crusher type processing apparatus for recovering aggregate from a concrete block. In the present invention, the concrete block that is an object to be processed has a structure. Concrete waste obtained by dismantling objects etc. is crushed and the rebars are removed.

  The processing apparatus of the present invention basically has a jaw crusher structure, is fixed to the main body frame 1 and has a substantially flat plate-like fixed tooth 22 on the inside, and a fixed jaw 2 facing the fixed jaw. The swing jaw 3 is provided with a substantially flat moving tooth 32 on the inside. The main body frame 1 constitutes a front frame 12 assembled on the front side with respect to a base frame 11 installed horizontally, side blocks 13 assembled on the left and right sides, and left and right side portions of the processing chamber 4 described later. It is mainly composed of the side guard 14 and the fixed jaw 2 as a rear frame assembled on the rear side.

  The fixed tooth 22 is a plate-like member in which a number of groove-shaped crushing teeth are arranged on the surface, and the fixed jaw 2 is interposed via a fixed tooth mounting seat 21 provided with an engaging portion (not shown) on the surface. Is attached so that the plate surface is in a vertical state. Usually, the width (length in the lateral direction) of the fixed tooth 22 is designed to be about 600 to 1300 mm, and the length (length in the height direction) is designed to be about 600 to 2000 mm.

  On the other hand, the moving tooth 32 is a plate-like member in which a number of groove-shaped crushing teeth are arranged on the surface, like the fixed tooth 22, and the moving tooth provided with an engaging portion (not shown) on the surface. By being attached to the inner side (the processing chamber 4 side) of the swing jaw 3 via the attachment seat 31, the plate surface is disposed so as to be inclined. The moving teeth 32 have a shape that is gently curved so as to bulge inward (to the processing chamber 4 side) in order to feed the concrete block downward. Usually, the width (length in the lateral direction) of the moving tooth 32 is designed to be about 600 to 1300 mm, and the length (length in the height direction) is about 600 to 2000 mm, like the fixed tooth 22.

  Further, the angle between the fixed tooth 22 and the moving tooth 32 (the opening angle on the opposite sides) is set to 20 to 35 degrees by the inclination of the swing jaw 3. Thereby, in the processing apparatus, when viewed from the side by the fixed teeth 22 and the moving teeth 32, a substantially V-shaped processing chamber 4 is configured, and the upper and lower ends of the processing chamber 4 are respectively connected to the supply port 41 and A discharge port 42 is provided.

The size of the processing chamber 4 is designed to be approximately the same size as in the crushing processing of rocks and the like. The width of the supply port 41 at the upper end of the processing chamber 4 (frontage in the left-right direction) and the width of the discharge port 42 at the lower end of the processing chamber 4 (frontage in the left-right direction) are the same as the widths of the fixed teeth 22 and the moving teeth 32. It is. Usually, the opening L ₁ of the supply port 41 (the horizontal distance between the upper end of the fixed tooth 22 and the upper end of the moving tooth 32) is set to 200 to 250 mm. Doha 32 is repeated toward and away from the stationary teeth 22 by the rotation of the eccentric shaft 7 of the swing jaw 3 to be described later, FIG. 2, the opening amount L ₁ of the supply port 41 the maximum state, FIG. 3 opens amount L ₁ of the supply port 41 is the minimum condition. Further, the opening L ₂ of the discharge port 42 (the horizontal distance between the lower end portion of the fixed tooth 22 and the lower end portion of the moving tooth 32) is set to 35 to 40 mm. Then, FIG. 2 shows a state opening amount L ₂ is the largest of the outlet 42 when the operate the Doha 32, FIG. 3, the opening amount L ₂ of the discharge port 42 is the minimum condition .

  The swing jaw 3 provided with the moving teeth 32 is supported so that the upper and lower ends thereof can swing. That is, the lower end portion of the swing jaw 3 is urged in a direction away from the fixed jaw 2 by the urging means 5 and is supported on the main body frame 1 side through the toggle plate 6 so as to be swingable. As the biasing means 5, for example, a hook bolt attached to the lower end portion of the swing jaw 3 is locked and a hook bolt inserted into the front frame 12, and the front frame 12 projects to the opposite side of the swing jaw 3. It is configured by a combination of a coil spring, a washer, and a nut that are attached to the base end side of the hook bolt and constantly pull the hook bolt toward the front frame 12 side.

  The toggle plate 6 is a support plate arranged along the width direction of the swing jaw at the lower end portion of the swing jaw 3, and both side edges thereof are formed in an arc shape. One side edge (the right side edge in the figure) of the toggle plate 6 is fitted in the groove of the toggle block 61, and the other side edge (the left side edge in the figure) of the toggle block 61 is swinging. The jaw 3 is fitted in a groove as an engaging portion formed on the lower back surface portion. The toggle block 61 is mounted on a pedestal 62 and attached to a height-adjustable toggle plate mounting plate 63 inside the front frame 12 and is stored under the horizontal member 15 which is a part of the main body frame 1. In addition, the height is finely adjusted by inserting a spacer between the base 62 and the horizontal member 15.

  An upper end portion of the swing jaw 3 is rotatably attached to an eccentric shaft 7 that is installed in the horizontal direction and is rotated by a drive mechanism via a bearing 8. The eccentric shaft 7 is rotatably supported above the main body frame 1 by bearings (not shown) mounted on the left and right side blocks 13. The eccentric shaft 7 is an axis whose rotational center M is deviated from the center O of the shaft cross section, and the rotational shaft 70 of the flywheel 9 on the drive mechanism side is coupled to the rotational center M of the eccentric shaft 7. Usually, the diameter of the eccentric shaft 7 is designed to be 200 to 250 mm. In addition, as a drive mechanism, the mechanism in which the flywheel 9 is rotated with a motor via a V belt is generally used.

In the processing apparatus of the present invention, when the eccentric shaft 7 is rotated by the drive mechanism as described above, when viewed from the side, the upper end side of the moving tooth 32 performs a circular motion and the lower end side of the moving tooth 32 swings up and down in an arc shape. While moving, the moving tooth 32 repeatedly approaches and separates from the fixed tooth 22, and the concrete block in the processing chamber 4 can be processed. In that case, in the present invention, as shown in FIG. 1, the eccentric amount Lg of the eccentric shaft 7 is set to 10 to 15% of the average opening amount L ₁ of the supply port 41. Specifically, when the average opening ratio _{L 1} of the supply port 41 is designed to 200～250Mm, eccentricity Lg of the eccentric shaft 7 is 15 to 40 mm, preferably is set to 20 to 30 mm.

In the present invention, the amount of eccentricity Lg of the eccentric shaft 7 is from the rotation center M of the eccentric shaft 7 (the center of the rotation shaft 70 on the drive mechanism side) to the center O of the cross section orthogonal to the length of the eccentric shaft 7. Say distance. Further, as described above, the opening amount L ₁ of the supply port 41 refers to the horizontal distance between the upper ends of the Doha 32 fixed teeth 22, and the average opening ratio L _1, the maximum opening amount _{L 1} means the intermediate value (opening amount shown in FIG. 2 _{L 1)} and the minimum opening amount _{L 1} (the opening amount _{L 1} shown in FIG. 3).

  In the present invention, by setting the eccentric amount Lg of the eccentric shaft 7 in the above specific range, it is possible to recover the coarse aggregate and the fine aggregate from the concrete block with a high yield. In the processing apparatus of the present invention, the action by defining the eccentric amount Lg of the eccentric shaft 7 is considered as follows.

That is, in the processing apparatus of the present invention, the concrete block thrown from the supply port 41 is crushed in the processing chamber 4 by the moving teeth 32 repeatedly approaching and separating from the fixed teeth 22 by the rotation of the eccentric shaft 7. At the same time, the concrete particles produced are brought into contact with each other in the processing chamber 4 with stirring. At that time, in the conventional jaw crusher, the eccentric amount of the eccentric shaft is 10 mm or less, whereas in the processing apparatus of the present invention, the eccentric amount Lg of the eccentric shaft 7 is 10 to 15 of the average opening amount L ₁ of the supply port 41. %, Specifically, the eccentric amount Lg is set to 15 to 40 mm, and the operating range of the moving teeth 32 is large, and the above concrete granules, in other words, the coarse aggregate and cement component to which the mortar component is adhered The agglomerated fine aggregate can be brought into contact with each other so as to disentangle, and the coarse aggregate, the fine aggregate and the cement component can be separated.

  As a result, in the processing apparatus of the present invention, coarse aggregates and fine aggregates whose cement powder has adhered to the surface, that is, aggregates that have been polished can be taken out from the discharge port 42. And since the upper limit of the operating range of the swing jaw 3 is prescribed | regulated, a coarse aggregate is not crushed so much. Therefore, by using the processing apparatus of the present invention, the aggregate can be reliably recovered, and a high-quality recycled aggregate can be produced simply by subjecting the obtained aggregate to water washing and classification.

  Incidentally, using the processing apparatus of the present invention, the aggregate of 10 tons of concrete was collected and the aggregate was recovered. The coarse aggregate of 2 to 40 mm was 4.0 t, and the fine aggregate of 62.5 μm to 2 mm was 3 .1 t was obtained, and about 92% of the aggregate contained in the concrete block could be recovered. And these aggregates can be easily removed mainly by removing cement powder adhering to the surface by washing with water, and after classifying treatment to confirm the quality, they meet the quality standards of recycled aggregates. And it was confirmed to be of high quality. In the present invention, the coarse aggregate refers to an aggregate that passes through a 40 mm mesh sieve and does not pass through a 2 mm mesh sieve, and the fine aggregate passes through a 2 mm mesh sieve and 62. It refers to fine aggregate that does not pass through a 5 μm mesh screen (filter).

1: Main body frame 11: Base frame 12: Front frame 13: Side block 14: Side guard 15: Horizontal member 2: Fixed jaw 21: Fixed tooth mounting seat 22: Fixed tooth 3: Swing jaw 31: Dynamic tooth mounting seat 32 : Moving teeth 4: Processing chamber 41: Supply port 42: Discharge port 5: Biasing means 6: Toggle plate 61: Toggle block 62: Base 63: Toggle plate mounting plate 7: Eccentric shaft 70: Rotating shaft on the drive mechanism side 8 : Bearing 9: Flywheel L ₁ : Opening amount of supply port L ₂ : Opening amount of discharge port O: Center of shaft section M: Center of rotation Lg: Eccentricity

Claims (2)

  A jaw crusher-type concrete lump processing device for collecting aggregate from a concrete lump, which is fixed to a main body frame and has a substantially flat plate-like fixed tooth on the inside, and opposed to the fixed jaw And a processing jaw having a substantially V-shape when viewed from the side by the fixed teeth and the moving teeth. The upper and lower ends of the chamber are the supply port and the discharge port, respectively, and the lower end portion of the swing jaw is urged in a direction away from the fixed jaw by the urging means and is supported on the main body frame side through the toggle plate so as to be swingable. The upper end of the swing jaw is pivotally attached to an eccentric shaft that is installed in the horizontal direction and rotated by a drive mechanism via a bearing, and the eccentric amount of the eccentric shaft is provided. Processing apparatus concrete mass, characterized in that it is set to 10-15% of the average opening ratio of the mouth.   2. The concrete lump treatment apparatus according to claim 1, wherein an average opening amount of the supply port is 200 to 250 mm, and an eccentric amount of the eccentric shaft is 15 to 40 mm.

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