JP2000218189A - Underwater low-grade gravel crushing method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently crush low-grade gravel (having sizes of 5-10 mm) in a safe and highly operating manner without dust generation. SOLUTION: This device has a pair of crushing plates 19, 21 installed upright with the crushing parts 17 of both crushing plates 19, 21 positioned underwater. One 19 of the crushing plates is made to vibrate, while the other 21 is made to rock. Further, low-grade gravel (having sizes of 5-10 mm) 39 is supplied into a nip between both crushing plates 19, 21 from above together with water, and is efficiently crushed into sand by both crushing parts 17 underwater using the pressing force of the plates 19, 21 and an impact force by vibration of the crushing plate 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to billet gravel (gravel having a particle size of 5 mm to 10 mm) which can be used only for garden paving stones and the like.
The present invention relates to a method and apparatus for crushing underwater billet gravel, which can be crushed into sand (particle size: 5 mm or less).

[0002]

2. Description of the Related Art Conventionally, as the aggregate (sand, gravel) used for concrete for civil engineering and construction, river gravel and sand have been mainly used. Since then, regulations on the extraction of gravel from rivers have become stricter, and the extraction of gravel from rivers is now banned.

On the other hand, in the construction industry, the demand for sand and gravel is increasing, and as a result, typical gravel other than river gravel, and the source of the sand, are mountain gravel, mountain sand, sea sand, and crushed rock from mountains. Etc. began to be collected.

[0004] Here, the gravel and sand are sieved from rough gravel, and are classified as sand with a grain size of 5 mm or less, grainy with a grain size of 5 mm to 10 mm, gravel with a grain size of 10 mm to 25 mm, and others.

[0005] Among them, the aggregate used for concrete for civil engineering construction is sand having a particle size of 5 mm or less and a particle size of 10 mm to 10 mm.
25mm gravel.

Therefore, in many gravel plant factories, billy gravel having a particle size of 5 mm to 10 mm is not used and is left in a large pile.

[0007] As a device for crushing this billet gravel, there is a method and a device for crushing billet gravel described in Japanese Patent Application Laid-Open Nos. 7-124487 and 9-141112 filed by the present applicant.

In the former, a pair of tooth plates in which a large number of teeth including peaks and valleys are cut are erected so as to be narrower downward, and one tooth plate is intermittently pressed. The tooth plate is vibrated through the vibrating means, and by virtue of the pressing force of the two tooth plates, the resonance force due to the vibration, and the intermittent pressing force of one of the tooth plates, the bristle gravel is brought into contact with the mesh point (crush) ).

In the latter case, one end of the tooth plate is inclined and cut away to form a crushing surface, and the ridges and valleys of the teeth on the crushing surface of the pair of tooth plates are meshed with each other. A method and an apparatus for crushing vitreous gravel between crushing surfaces of both tooth plates by a pressing force of both tooth plates and an impact force due to vibration of one tooth plate.

[0010]

In both of the conventional examples, since the crushing of the gravel in air is performed, the falling speed of the gravels in the atmosphere is as high as about 490 cm per second, and the crushing is not crushed when the tooth plates are opened. However, there is a problem that a large amount of water falls downward and crushing loss is large.

In addition, the billy gravel has a small porosity of about 40% and has a small surface area. When crushed, the surface area increases, and the sand particles are pressed against the groove formed by the valley of the tooth plate by the pressing force of the tooth plate. If clogging occurs and the device continues to operate, the device will stop or the tooth plate will be damaged, so the device must be stopped to clear this clogging and forced to be removed manually, The problem was that continuous operation was not possible.

[0012] Since crushing of gravel and the like including billy gravel is performed in the air, dust is generated at the time of crushing, and this dust not only harms workers, but also causes harm on windy days. Had a problem that it had a negative effect on nearby residents.

The present invention provides an underwater billet crushing method and apparatus which is safe, has excellent workability, and can crush billet efficiently without generating dust. It is intended to provide.

[0014]

According to the present invention, a pair of crushing plates are erected, a lower portion of both crushing plates is used as a crushing portion, and both crushing portions are located in the water of a water tank. Vibration is performed through the vibrating means, the other crushing plate is oscillated, and between the crushing plates, billet gravel is supplied from above with water, and between the crushing portions in the water, the billet gravel is pressed, and the pressing force of both crushing plates is applied. In addition, sand is efficiently crushed into sand by an impact force due to vibration of one of the crushing plates.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An underwater billet gravel crushing apparatus according to the present invention will be described with reference to FIGS.

[0016] Tooth 1 consisting of peaks 11 and valleys 13 in the longitudinal direction
5 are engraved, and the height of the ridge 11 of each tooth 15 is increased at the central portion in the length direction, and is inclined so that the height decreases toward both sides in the length direction. A pair of crushing plates 19 and 21 each having a crushing portion 17 (on the near side in FIG. 2).
Is provided.

The teeth 15 of this embodiment are engraved only on one side of each of the crushing plates 19 and 21, and have a cross-sectional irregular shape (see FIG. 2).

One of the crushing plates 19 has a mounting plate 25 pivotally mounted on the base 23 with the crushing portion 17 facing downward.
Is fixed.

Vibration means 2 for vibrating mounting plate 25
7 is provided on the mounting plate 25.

The vibration means 27 of this embodiment is a vibration motor.

The other crushing plate 21 is fixed to the swinging portion 29 with the crushing portion 17 facing downward.

In this embodiment, the oscillating portion 29 is an oscillating plate 33 mounted on the rotating shaft 31 via an eccentric cam (not shown). When the rotating shaft 31 is rotated, the oscillating portion 29 swings via the eccentric cam. The moving plate 33 moves up, down, left and right.

The crush plates 19 and 21 are inclined upright by engaging the ridges 11 and the valleys 13 of the teeth 15 of the crushing portions 17 so as to face each other and to narrow the gap from above to below. The two crushing parts 17 are positioned so as to be perpendicular to each other.

It is desirable that the angle of inclination of both crushing plates 19 and 21 is adjustable.

The crushing surfaces 17 of the crushing plates 19 and 21 are
5 are located in the water.

A billet hopper 37 is provided above the crushing plates 19 and 21.

In the lower opening of the billy hopper 37,
The crushing portion 17 of the crushing plates 19 and 21 is supplied only when the crushing plates 19 and 21 are closed, and the supply of the shingle is stopped only when the crushing plates 19 and 21 are opened.
An intermittent billy gravel supply mechanism 41 for intermittently supplying the billy gravel 39 is provided in order to eliminate the billy gravel that passes through without being crushed between them and drastically reduce the crushing loss of the billy gravel.

The intermittent billet supply mechanism 41 of this embodiment has a blade 45 mounted on the rotating shaft 43 along the longitudinal direction of the rotating shaft 43, and the blade 45 is rotated by the rotation of the rotating shaft 43. Only when rotating in the axial direction of the blade 43 and rotating upward from below the rotating shaft 43 of the blade plate 45, the billet 39 in the billet hopper 37 is lifted and discharged downward.

In the intermittent supply of the billet gravel 39, the rotating shaft 43 of the intermittent billet gravel supply mechanism 41 and the rotating shaft 31 of the swinging part 29 are connected by a connecting chain 47, and both rotating shafts 31, 43 are connected. It is controlled by interlocking.

In the drawing, reference numeral 49 denotes an anti-vibration rubber for preventing the vibration of the mounting plate 25 from being directly transmitted to the base 23;
1 is an elastic body for preventing the vibration of the mounting plate 25 from being directly transmitted to the base 23 and improving the vibration efficiency, 53 is an elastic body for controlling the oscillating power of the oscillating plate, and 55 is an oscillating body. A fitting plate for controlling the swing of the moving plate, 57 is a tension rod for controlling the swing of the swing plate, 59 is a drive motor, 61 is a water supply port, 63 is a sand discharge mechanism, and W is water. .

A method for crushing billet gravel in water using the present apparatus will be described below.

First, a predetermined amount of the billet gravel 39 is put into the billy gravel hopper 37.

Next, one crushing plate 19 is vibrated by driving a vibration motor which is a vibration means 27, and the other crushing plate 21 is rocked by rocking a rocking portion 29.

Next, between the crushing portions 17 of the crushing plates 19 and 21 adjusted in advance according to the grain size of the sand to be obtained in advance.
With the water supply from the water supply port 61, the billet gravel 39 is intermittently supplied from the billy hopper 37 via the billy gravel intermittent supply mechanism 41.

The intermittent supply of the billet gravel 39 is achieved by supplying the billet gravel only immediately before the closing of the crushing plates 19 and 21 and stopping the supply of the villing gravel when the crushing plates 19 and 21 are opened. Crushing part 17 of crushing plates 19 and 21
This is to eliminate the billy gravel 39 that passes through the gap without being crushed, thereby drastically reducing the crushing loss of the billy gravel.

The intermittently supplied billet gravel 39 is preliminarily crushed between the crushing plates 19 and 21 excluding the crushing portion 17.

The pre-crushed billet gravel 39 is carried out between the crushing portions 17 of the crushing plates 19 and 21 positioned in the water of the water tank 35, and when passing through the crushing portion 17, one of the crushing plates is used. In addition to being crushed by the impact force of the vibration of 19, the crushing plates 19 and 21 are reliably crushed by the pressing force.

At this time, since both crushing parts 17 are located in the water, the pre-crushed billet gravel 39 falls in the water, so that the falling speed becomes very slow (about 240 c / s).
m), the time required to pass between the two crushing sections 17 is prolonged, the amount of vitrified gravel passing without being crushed is drastically reduced, and crushing is performed for a longer time than in the past, so that the crushing efficiency is extremely improved.

In the meantime, the peak 1 of the teeth 15 of the crushing plates 19 and 21
Due to the weight of the valley 13 and the valley 13 and the gravels 39, the gravels 39 inserted between the crushing plates 19 and 21 are crushed by controlling the upward and lateral movements, and are forcibly carried down.

The crushed billy gravel 39 becomes sand,
The sand quickly sinks downward without diffusing into the water in the water tank 35.

At this time, the vibration of one crushing plate 19 and the oscillation of the other crushing plate 21 are transmitted to the water, and the water in the water tank 35 and the vibration of this water and both crushing plates 1
Due to the vibrations and swings of the crushing plates 9 and 21, the sand in the crushing portions 17 of the crushing plates 19 and 21 is completely washed away, and the work of removing the sand and gravel clogged in the crushing plates, which is conventionally performed, is eliminated. Workability is improved, and continuous operation can be performed efficiently.

The sedimented sand is transferred from the water to a sand discharge mechanism 63.
And drained out of the water tank for use as appropriate.

Further, since the crushing of the gravel in water is performed, the generation of dust and the pollution caused by the crushing of the gravel in the air, which has been conventionally performed, are eliminated, and the worker and the nearby resident are exposed to the dust. There is no adverse effect.

In the present embodiment, the crushing plates 19 and 21 are formed by engraving a large number of teeth 15 each having a peak 11 and a valley 13. It may be shaped.

The meshing interval between the crushing portions 17 of the crushing plates 19 and 21 is desirably adjustable by a meshing interval adjusting mechanism or the like, but may not be adjusted.

Since the water in the water tank 35 is always carried out together with the sand via the sand carrying-out mechanism 63, it is necessary to always supply water from the water supply port 61.

Further, the water in the water tank 35 is easily contaminated with sand, and in order to purify the contaminated water, it is necessary to arrange an overflow mechanism 65 above the water tank 35 to constantly discharge the contaminated water.

[0048]

According to the underwater billet crushing method and the billet crushing apparatus of the present invention, the crushing surfaces of a pair of crushing plates are positioned in the water, so that the billet crushing is performed in the water. The vibration of the plate and the oscillation of the other crushing plate are transmitted to the water, and the water in the water tank and the vibration of the water and the crushing plate violate the crushed sand in the crushing portion of the crushing plate. The sand and gravel that had been washed away and clogged the crushed plate were eliminated
Workability can be improved and continuous operation can be performed efficiently.

In addition, the generation of dust and dust pollution, which have been generated during the conventional crushing of gravel in air, are eliminated.
Dust does not adversely affect workers and nearby residents.

In addition, since the gravel is crushed in the water, the falling speed of the gravel in the water becomes very slow, so that the time required to pass between the two crushing parts becomes longer, and the amount of billet passing without being crushed is drastically reduced. However, crushing loss can be drastically reduced, and crushing is performed for a longer time than in the past, so that crushing efficiency is extremely improved.

[Brief description of the drawings]

FIG. 1 is a front view of an underwater billet crushing apparatus according to the present invention.

FIG. 2 is a perspective view of a crush plate.

[Explanation of symbols]

 Reference Signs List 11 mountain 13 valley 15 tooth 17 crushing part 19 crushing plate 21 crushing plate 27 vibrating means 29 rocking part 35 water tank 39 billet 61 water inlet

Claims (2)

[Claims] 1. A pair of crushing plates (19) and (21) are erected, a lower portion of both crushing plates (19) and (21) is a crushing portion (17), and both crushing portions (17) are a water tank. (35), and place one of the crushed plates (1
9) is vibrated through vibrating means (27), and the other crush plate (21)
Is rocked, and between the crushing plates (19) and (21), the sandy gravel (39) is supplied together with water from above, and the sandy gravel (39) is crushed between the crushing parts (17) in the water. An underwater billet crushing method characterized by efficiently crushing sand by the pressing force of the plates (19) and (21) and the impact force of the vibration of one of the crushing plates (19). 2. A pair of crushing plates (19) and (21) are erected, a lower portion of both crushing plates (19) and (21) is a crushing portion (17), and both crushing portions (17) are a water tank. (35), and place one of the crushed plates (1
9) is vibrated through vibrating means (27), and the other crush plate (21)
Underwater billet crushing device characterized by swinging