JP2018012941A - Agitating and mixing attachment and agitating and mixing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agitating and mixing attachment and an agitating and mixing method which can efficiently agitate and mix sediment or the like with a simple configuration.SOLUTION: An agitating and mixing attachment 1 is constituted by an attachment part 2, and a plurality of rod-like bodies 3. The rod-like bodies 3 are arrayed in a first array group 3A adjacent to an outer peripheral surface of a bottom 14 of a bucket 11, and a second array group 3B separated from the first array group 3A, and rod-like bodies 3a and 3b of the first array group 3A and the second array group 3B are arranged to have a gap therebetween in a width direction of the bucket 11. Further, the rod-like bodies 3a of the first array group 3A and the rod-like bodies 3b of the second array group 3B are arranged to be offset in the width direction of the bucket 11. The agitating and mixing attachment 1 is fixed on the bucket 11 through the attachment part 2, and a hydraulic shovel 10 is operated and is moved in a state in which the rod-like bodies 3 are inserted in an object D. Thus, the object D is agitated and mixed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an attachment for stirring and mixing and a stirring and mixing method. More specifically, the present invention relates to an attachment for stirring and mixing and a stirring and mixing method capable of efficiently stirring and mixing earth and sand with a simple configuration.

  An operation of stirring and mixing a solidified material such as a cement-based solidified material with soft soil may be performed using a hydraulic excavator. At that time, a drilling bucket with a stirring device has been proposed as a device for efficiently stirring and mixing earth and sand (for example, Patent Document 1).

  The bucket of Patent Document 1 is provided with a plurality of stirring blades on a rotating shaft rotatably attached to the bucket body, and a plurality of slits are provided in the rear part of the bucket body corresponding to each stirring blade. This bucket is attached to the tip of an arm of a hydraulic excavator, and the rotating shaft is rotated by a hydraulic motor so that a stirring blade stirs and mixes earth and sand. According to this bucket, stirring and mixing can be efficiently performed by appropriately setting the rotation speed of the stirring blade. However, this bucket has a complicated structure because it requires a separate hydraulic pipe for rotating the stirring blade.

JP 2012-117334 A

  An object of the present invention is to provide an attachment for stirring and mixing and a stirring and mixing method capable of efficiently stirring and mixing earth and sand while having a simple configuration.

  In order to achieve the above object, the stirring and mixing attachment according to the present invention is a stirring and mixing attachment fixed to a drilling bucket of a hydraulic excavator, the mounting portion being fixed to the bucket, and the mounting portion being fixed to the bucket. A plurality of bar-like bodies extending from the base end of the claw of the bucket in the toe-toe direction and projecting to the front end side of the claw tip when the fixed state is provided, A first row group disposed adjacent to the outer peripheral surface of the bottom of the bucket, and a second row disposed with a gap from the first row group apart from the first row group with respect to the bottom. A plurality of the rod-shaped bodies that are arranged with gaps in the width direction of the bucket, and the first row group and the second row group constitute the first row group; The rod-shaped body constituting the second row group is the width of the bucket Characterized in that it is offset in the direction.

  In the stirring and mixing method of the present invention, the above-described stirring and mixing attachment is fixed to the bucket via the mounting portion, and the hydraulic excavator is operated to move the plurality of rod-shaped bodies inserted into an object. Thus, the object is stirred and mixed.

  The attachment for agitation and mixing according to the present invention has a basic configuration including an attachment portion and a plurality of rod-shaped bodies, and has a simple configuration that does not require power such as a hydraulic motor. Therefore, there is no need for attachment-specific hydraulic piping or the like, and it can be mounted on a general hydraulic excavator, so the versatility is very high. Since the plurality of rod-shaped bodies are arranged in a specially devised manner, it is possible to efficiently stir and mix the objects by moving these rod-shaped bodies in the objects such as earth and sand.

  The rod-like body may have a quadrangular cross section, and the pair of diagonal lines may have the same direction as the separation direction of the first row group and the second row group. With this configuration, the rod-shaped body has a sharp shape with respect to the separation direction of the first row group and the second row group. As a result, the flow of the object passing through the first row group and the second row group can be smoothly disturbed appropriately, and the mixture can be more sufficiently stirred and mixed.

  The size of the gap between adjacent rod-like bodies constituting the second row group and the rod-like body constituting the first row group is the gap between the adjacent rod-like bodies constituting the first row group. It is preferable that the size be 80% or more and 120% or less of the size. Further, the size of the gap between the rod-like bodies constituting the second row group and the rod-like bodies constituting the first row group is determined by the size of the adjacent rod-like bodies constituting the first row group. It is good to make it the structure which is more than the size of the gap. These configurations are advantageous for improving the stirring and mixing efficiency.

  When the attachment portion is configured to be freely fixed and unfixed to the bucket, the work of fixing and unfixing the stirring and mixing attachment to the bucket is facilitated, and the versatility of the stirring and mixing attachment is improved. it can.

  In the stirring and mixing method of the present invention, the object may be stirred and mixed by moving the plurality of rod-shaped bodies in the separating direction between the first row group and the second row group. Thereby, it becomes easy to efficiently stir and mix the object.

It is explanatory drawing which illustrates the attachment for stirring mixing of this invention, and the bucket of a hydraulic shovel by a side view. It is explanatory drawing which illustrates the state which fixed the attachment for stirring mixing of this invention to the bucket by a side view. FIG. 3 is a view as seen from an arrow A in FIG. 2. It is explanatory drawing which illustrates the arrangement | sequence of the rod-shaped body of FIG. 3 by a cross-sectional view. FIG. 5A shows a state in which the rod-shaped body of the attachment is inserted into the object and is stirred and mixed, and FIG. 5B is an explanatory diagram showing a state in which the object is scooped up by the bar-shaped body. . It is explanatory drawing which shows typically the condition where a target object passes between the rod-shaped bodies of FIG. 4 by a cross-sectional view.

  Hereinafter, the attachment for stirring and mixing and the stirring and mixing method of the present invention will be described based on the embodiments shown in the drawings.

  The stirring mixing attachment 1 (hereinafter referred to as attachment 1) of the present invention illustrated in FIGS. 1 to 4 is used by being fixed to an excavation bucket 11 (hereinafter referred to as bucket 11) of a hydraulic excavator 10. Using this attachment 1, the object D such as earth and sand is stirred and mixed.

  As shown in FIG. 1, the attachment 1 includes an attachment portion 2 fixed to the bucket 11 and a plurality of rod-like bodies 3 (3a, 3b). The attachment portion 2 includes a mediating member 2 a interposed between the bucket 11 and the plurality of rod-like bodies 3, and a fixing member 2 b that fixes the mediating member 2 a to the bucket 11.

  By interposing the mediating member 2 a between the bucket 11 and the plurality of rod-shaped bodies 3, the rod-shaped body 3 is stably arranged with respect to the bucket 11. The contact surface of the mediating member 2a with the bucket 11 may be formed in accordance with the shape of the bottom 13 of the bucket 11 or the outer peripheral surface of the claw 12 of the bucket 11.

  The fixing member 2b is configured by a member that can be connected to the claw 12 of the bucket 11, a cutting blade, a side wall, or the like. The specification of the fixing member 2b can be appropriately determined according to the shape of the bucket 11. The fixing member 2b of this embodiment is configured by a clamp that can be fixed to and released from the claw 12 of the bucket 11 freely. Instead of providing the fixing member 2b, the intermediate member 2a and the bucket 11 may be joined by welding.

  If the attachment portion 2 is configured to be freely fixed and unfixed to the bucket 11 as in this embodiment, the work of fixing and unfixing the attachment 1 to the bucket 11 becomes easy, and versatility as the attachment 1 is achieved. Becomes very high.

  The rod-shaped body 3 is composed of a metal square bar, a square pipe, a round bar, a round pipe, or the like. The dimensions of the rod-shaped body 3 can be appropriately determined according to the object D to be agitated and mixed, the size of the bucket 11 to be mounted, and the like. Specifically, for example, a rectangular bar or a square pipe with a side of about 30 mm to 80 mm in the cross section, and a round bar or a round pipe with an outer diameter of about 30 mm to 80 mm are employed.

  As shown in FIG. 2, the plurality of rod-shaped bodies 3 extend from the base end portion 12 a of the claw 12 of the bucket 11 toward the claw tip 12 b (Z direction) when the attachment portion 2 is fixed to the bucket 11. And it arrange | positions so that it may protrude in the front end side rather than the toe 12b. The protruding length L of the plurality of rod-shaped bodies 3 from the toe 12b is determined based on the properties of the object D and the like. Although the tip positions of the respective rod-like bodies 3 are basically the same, they can be different.

  As shown in FIG. 2, the plurality of rod-shaped bodies 3 constitute a first row group 3A and a second row group 3B. The first row group 3 </ b> A is disposed adjacent to the outer peripheral surface of the bottom 13 of the bucket 11. The second row group 3B is spaced apart from the bottom 13 of the bucket 11 on the outer peripheral side (X direction) with respect to the first row group 3A and spaced from the first row group 3A.

  As shown in FIGS. 3 and 4, the first row group 3 </ b> A and the second row group 3 </ b> B are a plurality of rod-like bodies 3 (3 a, 3 b) arranged with gaps in the width direction (Y direction) of the bucket 11. Respectively. A rod-like body 3a (hereinafter referred to as a rod-like body 3a) constituting the first row group 3A and a rod-like body 3b (hereinafter referred to as a rod-like body 3b) constituting the second row group 3B are offset in the width direction of the bucket 11. In this embodiment, the rod-shaped body 3 is constituted by a square bar having a square cross section. Each rod-shaped body 3a, 3b is arranged such that the direction of a pair of square diagonal lines in the cross section is the same as the X direction.

  More specifically, the rod-shaped bodies 3a are arranged with a gap g1 between adjacent bars, and the rod-shaped bodies 3b are arranged with a gap g2 between adjacent bars. The rod-shaped bodies 3a and the rod-shaped bodies 3b are alternately arranged when viewed from the separation direction (X direction) between the first row group 3A and the second row group 3B. Adjacent rod-like body 3a and rod-like body 3b are arranged with a gap g3. The rod-like bodies 3b may be arranged at the center position between the adjacent rod-like bodies 3a as viewed in the X direction.

  In this embodiment, a plurality of joining members 4 are provided so as to extend in the Y direction, and the rod-like bodies 3a and 3b are fixed to these joining members 4 in the above-described arrangement. The connecting member 4 is made of, for example, channel steel or angle steel.

  The sizes of the gaps g1, g2, and g3 are appropriately determined according to the object D to be stirred and mixed, the required fineness of stirring and mixing, and the like. For example, the gaps g1, g2, and g3 are set in the range of 5 cm to 15 cm. The gap g1 and the gap g2 are preferably the same size, and the size of the gap g3 is preferably 80% to 120% of the size of the gap g1 (gap g2). More preferably, the above condition is satisfied and the size of the gap g3 is set to be equal to or larger than the size of the gap g1.

  Next, a stirring and mixing method using this attachment 1 will be described below.

  First, as illustrated in FIG. 2, the attachment 1 is fixed to the bucket 11 of the excavator 10 via the attachment portion 2. Specifically, the mediating member 2 a is brought into contact with the bottom 13 of the bucket 11 and the claw 12, and the fixing member 2 b is fixed so as to be fitted to the claw 12. When the attachment part 2 does not have the fixing member 2b, the mediating member 2a and the bucket 11 are joined by welding.

  And as shown to Fig.5 (a), the hydraulic shovel 10 is operated and each rod-shaped body 3a, 3b is inserted in the target object D. FIG. Then, the rod-like bodies 3a and 3b are moved in the separation direction (X direction) between the first row group 3A and the second row group 3B while being inserted into the object D. This stirring and mixing operation is performed by shifting the position where the rod-like bodies 3a and 3b are inserted in the bucket width direction (Y direction), and stirring and mixing is performed covering the necessary range of the object D.

  As shown in FIG. 5B, the bucket 11 can be vibrated in a state where the object D is lifted up to the attachment 1 and / or the bucket 11 and placed on the plurality of rod-like bodies 3a and 3b. Thereby, it can stir and mix so that the target object D may be sieved with the some rod-shaped body 3a, 3b.

  In the present invention, as shown in FIG. 6, the object is obtained by moving the first row group 3A and the second row group 3B in the separating direction with the plurality of rod-like bodies 3a and 3b inserted into the object D. The direction in which D flows can be effectively changed. The object D is efficiently mixed and agitated because the object D is diverted and joined in a complicated manner in the process of passing through the first row group 3A and the second row group 3B. When there is a variation in viscosity or specific gravity in the object D, the variation can be made uniform more quickly. When the object D includes a plurality of materials, these materials can be evenly dispersed more rapidly.

  When the size of the gap g3 is set to 80% or more and 120% or less of the size of the gap g1 (gap g2), the object D is hardly clogged in the process of passing through the first row group 3A and the second row group 3B, and It can be set as the attachment 1 which can stir-mix the target object D efficiently. When the size of the gap g3 is less than 80% of the size of the gap g1 (gap g2), the object D that has passed through the gap g1 is easily clogged with the gap g3, and the stirring and mixing ability of the attachment 1 is reduced. On the other hand, when the size of the gap g3 is more than 120% of the size of the gap g1, the change in the flow direction of the object D that has passed through the gap g1 is reduced, and the stirring and mixing ability of the attachment 1 is reduced.

  Furthermore, if the size of the gap g3 is greater than the size of the gap g1, the flow rate of the object D that can pass through the gap g3 can be increased relative to the flow rate of the object D that can pass through the gap g1, so that it passes through the gap g1. It becomes difficult for the target object D to stay in the gap g3. Therefore, the plurality of rod-like bodies 3a and 3b allow the object D to pass smoothly while being moderately disturbed, thereby further efficiently stirring and mixing.

  In this embodiment, since the rod-like bodies 3a and 3b having a quadrangular cross section have a sharp shape with respect to the separation direction of the first row group 3A and the second row group 3B, a plurality of rod-like bodies 3a, It is possible to reduce the resistance when moving the first row group 3A and the second row group 3B in the separating direction with the 3b inserted into the object D. Therefore, the plurality of rod-like bodies 3a and 3b can be moved more smoothly in the object D and can be shunted sharply. Along with this, the stirring and mixing efficiency can be further improved.

  Thus, since the attachment 1 of the present invention has a specially devised arrangement of the plurality of rod-like bodies 3a and 3b as described above, the plurality of rod-like bodies 3a and 3b are moved in the object D. Thus, it is possible to efficiently stir and mix the object D. Moreover, the attachment 1 has a basic configuration with the mounting portion 2 and the plurality of rod-like bodies 3a and 3b, and has a simple configuration that does not require power from a hydraulic motor or the like. Therefore, there is no need for attachment-specific hydraulic piping or the like, and it can be mounted on a general hydraulic excavator 10, so versatility is very high.

  By arranging a plurality of rod-shaped bodies 3a and 3b so as to protrude to the tip side from the tip 12b of the bucket 11, it is possible to stir and mix a deeper range at a time than when stirring and mixing only with the bucket 11. It has become. In addition, by stirring the bucket 11 with the object D placed on the plurality of rod-like bodies 3a and 3b, it is also possible to stir and mix the earth lump of the object D finely.

  The protrusion length L protruding from the toe 12b of each rod-shaped body 3a, 3b is 0.2 times the bucket list radius R when the length from the center of the bucket mounting pin 14 to the toe 12b is the bucket list radius R. It is good to make the length up to 1.0 times. Thereby, it is possible to make the attachment 1 easy to operate with the excavator 10 while widening the range in which stirring and mixing can be performed at once.

The following experiments 1 to 3 were performed to grasp the stirring and mixing efficiency when the modified soil was produced by stirring and mixing a predetermined amount of clay and calcia reforming material. This stirring and mixing efficiency was evaluated based on the wet density of the modified soil (after stirring and mixing) with respect to the wet density of the clay (before stirring and mixing) and the mixing ratio R calculated by the following equation (1). The greater the degree of change in the wet density of the modified soil relative to the wet density of the dredged soil, the better the stirring and mixing efficiency, and the closer the numerical value of the mixing ratio R is to the design value set before mixing of 30%, This means that the stirring and mixing efficiency is good.
Mixing ratio R = {(ba) / (ca)} × 100 (%) (1)
Here, a is wet density of dredged material (g / ^cm 3), b is the wet density (g / ^cm 3) of the modified soil, c is is-dry density of calcia modifier (g / cm ³⁾ .

  Experiment 1: Modified soil was manufactured by manually stirring and mixing earth and sand using an experimental instrument in which six rods having the same specifications were arranged in a row with gaps in the width direction. Each rod-like body was stirred and mixed by being repeatedly moved in the front-rear direction under the same conditions while being inserted in the earth and sand under the same conditions. The width of the rod-shaped body is 20 mm, and the gap between the rod-shaped bodies adjacent to each other in the width direction is substantially the same as 100 mm, and only the cross-sectional shape of the rod-shaped body is different (form 1, 2, 3). ) Was used.

Form 1 is a circular cross section, Form 2 is a square cross section, Form 3 is a rhombus cross section, and in Form 2, a pair of faces facing each other in the cross section of the rod-shaped body are arranged in the width direction and the front-rear direction. did. In the form 3, each diagonal line in the cross section of the rod-shaped body is arranged in the width direction and the front-rear direction. The wet density of the clay before stirring and mixing was 1.52 (g / cm ³ ). The results of the experiment are as shown in Table 1. Form 3 was found to be easier to mix manually than Form 1 and Form 2, and to have low resistance when stirring and mixing.

  From the result of Table 1, there is no remarkable difference in the forms 1 to 3 with respect to the wet density and the mixing ratio R, and no difference is observed in the stirring and mixing state even visually. It can be seen that the resistance force F is very small in the form 3 compared to the forms 1 and 2, and can reduce the energy required for the stirring and mixing.

  Experiment 2: Two types of experimental instruments (Example 1 and Comparative Example) having a plurality of rod-shaped bodies in which a square shaped steel having a cross section of 40 mm on one side is arranged with the diagonals facing in the width direction and the front-rear direction. Each was attached to the same backhoe bucket and mixed with stirring to produce modified soil. Each rod-like body protruded about 1000 mm from the toe of the bucket, and with only the rod-like body inserted into the earth and sand under substantially the same conditions, the rod-like bodies were repeatedly moved in the front-rear direction under the same conditions and stirred and mixed. In Example 1 and the comparative example, the size of the gap between the rod-shaped bodies adjacent in the width direction was substantially the same as 60 mm, and only the number and arrangement of the rod-shaped bodies were varied.

  Example 1 has a first row group in which five rods having a rhombus cross section are arranged in one row at intervals in the width direction, and a second row group. The second row group is arranged with a gap of 60 mm in the front-rear direction with respect to the first row group, and the rod-like bodies of the first row group and the second row group are offset in the width direction. The rod-shaped body of the second row group is an offset arranged at the center of the gap between the rod-like bodies adjacent in the width direction of the first row group. The comparative example is a specification having only the first column group.

In Example 1, the wet density of the clay before stirring and mixing was 1.53 (g / cm ³ ), and in the comparative example, it was 1.51 (g / cm ³ ). The results of the experiment are as shown in Table 2.

  From the results of Table 2, it can be seen that Example 1 is superior in stirring and mixing efficiency (wet density and mixing rate R) as compared with the comparative example.

  Experiment 3: Three types of buckets having different specifications (Example 1, Conventional Examples 1 and 2) were each attached to the same backhoe, and the soil was stirred and mixed under substantially the same conditions to produce modified soil.

  In Example 2, a square shaped steel having a cross section of 40 mm on one side is arranged in one row with five rod-like bodies arranged with the diagonals facing in the width direction and the front-rear direction with a gap of 150 mm in the width direction. The first column group and the second column group. The rod-shaped bodies of the first row group and the second row group are offset in the width direction. The rod-shaped bodies of the second row group are offset arranged in the center of the gap between the rod-like bodies adjacent in the width direction of the first row group. The size of the gap between adjacent rod-like bodies constituting the first row group and the rod-like bodies constituting the second row group was 140 mm. Each rod-like body protrudes about 700 mm from the toe of the bucket, and only the rod-like body is inserted into the earth and sand, and is repeatedly moved in the front-rear direction to be stirred and mixed.

  Conventional Example 1 is a general mixing bucket having a rotor that is driven to rotate, and is stirred and mixed while being buried in earth and sand.

  Conventional example 2 is a general bucket for excavation, and the bucket was repeatedly moved in the front-rear direction in a state where the bucket was inserted into the earth and sand and mixed by stirring.

The wet density of the clay before stirring and mixing in both Example 1 and Conventional Examples 1 and 2 is 1.59 (g / cm ³ ), and the results of the experiment are as shown in Table 3.

  From the results in Table 3, it can be seen that Example 2 is superior to Conventional Example 2 in stirring and mixing efficiency (wet density and mixing rate R) and has the same performance as Conventional Example 1. In Example 2, although clogging of earth and sand slightly occurred between the first row group and the second row group, it was confirmed that the improvement was achieved by increasing the clearance between the two rows by about 10 to 20 mm.

DESCRIPTION OF SYMBOLS 1 Stir-mix attachment 2 Attachment part 2a Mediating member 2b Fixing member 3, 3a, 3b Rod-shaped body 3A 1st row group 3B 2nd row group 4 Connection member 10 Excavator 11 Excavation bucket 12 Claw 12a Claw base end 12b Toe 13 Bucket bottom 14 Bucket mounting pin D Object R Bucket list radius

Claims (7)

An agitation / mixing attachment fixed to an excavator bucket of a hydraulic excavator, wherein a fixing portion fixed to the bucket and a base end of the bucket claw when the mounting portion is fixed to the bucket A plurality of rod-like bodies extending in the tiptoe direction from the portion and projecting toward the tip side from the tiptoe,
The plurality of rod-like bodies are disposed adjacent to the outer peripheral surface of the bottom of the bucket, and the first row group is spaced apart from the first row group with respect to the bottom. A second group of rows arranged with a gap between them,
The first row group and the second row group have a plurality of the rod-like bodies arranged with gaps in the width direction of the bucket, and constitute the rod-like body and the second row group constituting the first row group. The stirring and mixing attachment, wherein the rod-like body is offset in the width direction of the bucket.   2. The stirring and mixing attachment according to claim 1, wherein the rod-like body has a quadrangular cross section, and a pair of diagonal lines of the quadrangular shape are in the same direction as a separation direction of the first row group and the second row group. .   The size of the gap between adjacent rod-like bodies constituting the second row group and the rod-like body constituting the first row group is the gap between the adjacent rod-like bodies constituting the first row group. The attachment for stirring and mixing according to claim 1 or 2, which is 80% or more and 120% or less of the size.   The size of the gap between adjacent rod-like bodies constituting the second row group and the rod-like body constituting the first row group is the gap between the adjacent rod-like bodies constituting the first row group. The attachment for stirring and mixing according to claim 3, wherein the attachment is larger than the size.   The stirring and mixing attachment according to any one of claims 1 to 4, wherein the attachment portion is configured to be freely fixed and unfixed with respect to the bucket.   The stirring / mixing attachment according to any one of claims 1 to 5 is fixed to the bucket via the mounting portion, and the hydraulic excavator is operated to move the plurality of rod-shaped bodies inserted into an object. The stirring and mixing method, wherein the object is stirred and mixed.   The stirring and mixing method according to claim 6, wherein the plurality of rod-shaped bodies are moved in a separation direction between the first row group and the second row group.

Images