JPH0141508Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a screen that sieves materials such as ore, coal, coke, lime, etc. according to particle size.

In screens that sieve materials such as ore, coal, coke, lime, etc. by particle size, relative movement is performed between the materials and the screen for a predetermined period of time, separating those that pass through the holes in the screen and those that do not. I try to separate them. By the way, when the material to be sorted moves relatively on the screen or passes through the holes in the screen, the screen is worn out due to the rubbing and scratching of the material to be sorted against the screen. It varies depending on the shape, bulk density, particle size, etc. of the object. Therefore, conventional screens used include woven wire mesh, punched wire mesh, rubber screens, urethane screens, etc., but conventional screens are susceptible to wear due to rubbing and scratching of the material to be sorted, and their lifespan is short. The reality is that it was.

In view of the above, the present invention aims to provide excellent wear resistance by laying ceramic pieces on the top side of the screen, and also to make the ceramic pieces easy to lay. Furthermore, it is also intended to reduce damage to the ceramic pieces due to vibrations during sieving operations.

The feature of the present invention is that the screen has rectangular holes formed in a grid pattern in plan view, and includes a base made of rubber and a plurality of pieces made of ceramic that are rectangular in plan view. ,
Each piece is arranged with each side parallel to each side of the hole, and is laid over almost the entire upper surface of the base, and the pieces constitute the upper side of the inner wall of the hole, and furthermore, The length of one side parallel to the direction in which the holes are arranged is such that a plurality of pieces can be arranged along one side of the hole, and the thickness of the base in the vertical direction is The size is approximately half or more of the vertical thickness of the screen,
A gap is provided between each piece, and this gap is filled with rubber. At the point.

Hereinafter, one embodiment of the present invention will be described based on the drawings of FIGS. 1 to 3. In FIG. 1, 1 is a screen, and a pair of extension brackets 2 are provided on both left and right sides of the screen. 2 is included in a vibrating device that vibrates the screen 1 horizontally and/or vertically.

As shown in FIGS. 2 and 3, the screen 1 is formed with a large number of square holes 3 in a grid pattern of about 50 mm in length and width in plan view, and the screen 1 has a thickness of about 20 mm. It is composed of a base 4 and a large number of first and second pieces 5 and 6 that are rectangular in plan view, and the vertical thickness of the base 4 is larger than approximately half the vertical thickness of the screen.

The base 4 mainly constitutes the screen 1 and is made of unvulcanized rubber, and has a reinforcing core material 7 on its lower side that is fixed to each bracket 2 at each end. Note that the reinforcing core material may not be provided.

The first and second pieces 5 and 6 are made of hard ceramic, such as alumina porcelain, that has wear resistance and is difficult to adhere to sorted materials.
It is said to have a rectangular shape of about mm.

The first piece 5 is arranged around the four circumferences of the eye hole 3 with each side parallel to each side of the eye hole 3, and the second piece 5
The piece 6 is arranged between the holes 3 with each side parallel to each side of the hole 3, and the first and second pieces 5, 6 are vulcanized and bonded to the base 4, so that the base The entire upper surface of the base plate 4 is covered with a large number of first and second pieces 5 and 6 placed regularly thereon.

Here, the length of one side parallel to one side in the arrangement direction of the holes 3 of the pieces 5 and 6 along one side parallel to one side in the arrangement direction of the holes 3 is the length of one side parallel to one side in the arrangement direction of the holes 3. The length is such that multiple numbers 6 can be arranged.

The first piece 5 constitutes the upper opening edge and the upper inner wall of the eye hole 3, and has a thickness of about 10 mm, which is about half the thickness of the screen 1. The upper opening edge on the hole side is chamfered. Further, the thickness of the second piece 6 is approximately 3 mm.

The first and second pieces 5 and 6 are vulcanized and bonded to the base 4 in the following manner. That is, first, an adhesion aid (trade name:
Chemlok220, Ty-Ply UP/RC, etc.) are applied, the first and second pieces 5 and 6 are placed side by side on the top surface of the base 4, and the top surface of the base 4 is covered, and these are heated and pressurized. The first and second pieces 5 and 6 are bonded to the base 4 by vulcanization and using the properties of rubber.

Note that the base 4 is formed of vulcanized rubber, and the base 4 and the first and second pieces 5 and 6 are vulcanized and bonded with an intervening body made of unvulcanized rubber interposed between the base 4 and the first and second pieces 5 and 6. You can do it like this. In this case, the above adhesive agent is applied to one or both of the upper surface of the base 4 and the lower surface of the intervening body, and to one or both of the intervening body and the first and second pieces 5 and 6. Apply.

Then, gaps are provided between the first piece 5, between the second piece 6, and between these first and second pieces 5, 6, and in this gap, the first and second pieces 5, 6 are vulcanized with respect to the base 4. At the time of bonding, the rubber and adhesion aid of the base 4 and the intervening body are raised to fill the gap.

Next, the effect will be explained. When screening material such as ore, coal, coke, lime, etc. is to be sieved by particle size using the screen 1, the material to be selected is placed on the screen 1 and the screen 1 is vibrated by a vibrating device. Then, among the materials to be sorted on the screen 1, those smaller than the size of the holes 3 fall through the holes 3, and those larger than the size of the holes 3 remain on the screen 1 and are separated. can be sieved out. In this case, the upper surface side of the screen 1 and the upper inner wall portion of the opening 3, which are easily worn out by rubbing or scratching by the sorted material during the sieving operation, are constituted by the first and second pieces 5 and 6 made of ceramic. As a result, the wear of the screen 1 is slow and the life of the screen 1 can be extended, and since it is difficult for deposits to adhere to the ceramic, the screen 1 is less likely to be clogged. Since it is composed of the first and second pieces 5 and 6 and the base 4 made of rubber, the contact between the material to be sorted and the screen 1 does not generate loud noises such as metallic sounds, and the work is easy. We can make the environment better. Furthermore, as mentioned above, since the base 4 of the screen 1 is made of rubber, the elastic deformation of the base 4 can cushion and absorb shocks caused by collisions between the material to be sorted and the screen 1 during sieving work. .

FIG. 4 shows a second embodiment of the present invention, in which the thickness of the first piece 5 is the same as that of the screen 1.
The diameter is 20 mm, and the upper and lower opening edges and the entire inner wall of the eye hole 3 are made up of the first piece 5.

FIG. 5 shows a third embodiment of the present invention, in which third pieces 8 having the same shape as the first piece 5 are arranged around the holes 3 on the lower surface of the base 4. is vulcanized and bonded to the base 4, so that the holes 3
The upper and lower opening edges and the entire inner wall are constituted by the first and third pieces 5 and 8.

6 and 7 show a first comparative example of the present invention, in which a large number of pieces 9 each having a hollow rectangular shape of about 100 mm in length and width are arranged in a grid pattern without gaps on the upper surface of a base plate 4. It is laid by being vulcanized and bonded to the base 4, and the holes 3 are formed by an upper hole 10 formed in the piece 9 and a lower hole 11 formed in the base 4.
It is composed of. The thickness of the piece 9 is constant throughout.

FIG. 8 shows a second comparative example of the present invention, which is a slightly modified version of the first comparative example, with piece 9
The wall thickness of the four circumferences on the upper eyelet side is said to be larger than the other parts.

FIG. 9 shows a third comparative example of the present invention, in which a spherical piece 12 is attached to the entire upper surface of the base 4 and the inner surface of the eye hole.
is embedded in the base 4 or protrudes from the base 4 by vulcanization adhesive or the like.

In the first comparative example and the second comparative example, only one piece is arranged for each eye hole. In contrast, in the screen according to the present invention, a plurality of pieces are arranged along one side parallel to one direction in which the holes are arranged. That is, a screen of the same size has a larger number of pieces and is smaller than that of the comparative example.

This is because the screen vibrates when sifting, but since the piece is made of hard ceramic, it has a harder time transmitting vibrations than something like rubber, so the larger the size, the more likely it is to be damaged by cracks. Also, the smaller the number, the wider the damage range to the entire screen. From this,
The screen according to the present invention has a greater effect in preventing damage caused by vibration during sieving work than the comparative example.

In addition, in the third comparative example, the pieces are spherical, so when laying them on the top side of the screen,
Compared to the piece according to the present invention which is rectangular in plan view, it is difficult to arrange the holes regularly in a grid pattern, and it takes time and effort to manufacture the screen. On the other hand, if the pieces are rectangular in plan view as in the present invention, each side of the pieces is parallel to each side of the aperture, so that they can be easily and regularly arranged and laid on the top surface of the screen.

As described in detail above, according to the present invention, the ceramic piece is laid over substantially the entire upper surface of the base, so that the screen is less likely to wear out and can have a long lifespan.

In addition, since the upper part of the inner wall of the eyelet is formed by the piece, (i) it is possible to prevent wear of the upper part of the inner wall of the eyelet, which tends to wear easily, and the eyelet becomes larger in a short period of time due to wear; can be prevented, and the sieving accuracy can be maintained for a long period of time.

(ii) It is possible to prevent particles larger than the holes from entering the holes while elastically deforming the inner walls of the holes, and prevent clogging of the screen due to large objects entering the holes. can.

(iii) Even if the powder to be sorted is wet, it is difficult to adhere to the upper side of the inner wall of the holes, and clogging of the screen due to adhesion of this powder can be prevented.

(iv) Not only the pieces are laid over almost the entire upper surface of the base, but also the upper part of the inner wall of the hole is made up of pieces, so that the sieving work of high-temperature materials can be performed well.

Further, according to the screen according to the present invention, the holes are square in plan view and arranged in a grid pattern, and the ceramic pieces are square in plan view and each side of the holes is arranged parallel to each side of the holes. Therefore, the work of laying the pieces on the base can be done quickly and easily, making it easier to manufacture the screen.

Furthermore, the length of one side parallel to one side of the eye hole arrangement direction of the piece that is parallel to one side of the eye hole arrangement direction is set to be a length that allows multiple pieces to be arranged along one side of the eye hole. Therefore, the pieces can be made relatively small in size and in large quantities, and are not easily damaged by the vibration of the screen during sieving operations, and even if they are damaged, the damage area is small. It can be done.

Moreover, since the ceramic pieces are relatively small in size and available in large quantities, they do not significantly impede the vibrations caused by the elasticity of the rubber base itself during sieving work, and the sieving process due to the rubber base It does not impede the improvement of the separation effect, the clogging prevention effect, etc.

In addition, since gaps are provided between each piece and the gaps are filled with rubber, adjacent pieces will not collide with each other even when the vibrations occur during sieving, and the pieces will not crack. Even if the ceramic is fragile, damage can be prevented.

Since the thickness of the base is approximately half or more than the thickness of the screen, even though the base is made of rubber, it does not bend easily and has sufficient bending rigidity to withstand the screening work. It can be done. Furthermore, since the base does not bend easily,
The pushing force between adjacent pieces during sieving work is not absorbed by the deflection of the base, but is absorbed by the deformation of the rubber between the pieces, so even if the bending rigidity of the screen is increased, the pieces will not be damaged.

The present invention has the above advantages and is of great practical benefit.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a perspective view, FIG. 3 is a sectional view taken along line A-A in FIG. 4 and 5 are longitudinal sectional views of main parts showing the second and third embodiments of the present invention, FIG. 6 is a plan view showing the first comparative example of the present invention, and FIG. 7 is a plan view showing the first comparative example of the present invention. A sectional view taken along line B-B in FIG. 6,
8 and 9 are longitudinal cross-sectional views of main parts showing second and third comparative examples of the present invention. 1... Screen, 3... Eye hole, 4... Base,
5, 6, 8, 9, 12... Peace.

Claims (1)

[Scope of utility model registration request] It is a screen in which square holes in plan view are formed in a checkerboard pattern, and includes a base made of rubber and a plurality of pieces made of ceramic that are square in plan view, each piece having holes on each side. The pieces are arranged parallel to each side of the base plate and are laid over almost the entire upper surface of the base, and the pieces constitute the upper side of the inner wall of the hole, and the pieces are arranged parallel to each side of the hole along one side parallel to one side in the direction in which the holes are arranged. , the length of one side parallel to one direction in which the holes are arranged is such that multiple pieces can be arranged along one side of the hole, and the vertical thickness of the base is approximately half the vertical thickness of the screen. A screen characterized in that the screen has a size larger than that, and has gaps between each piece, and the gaps are filled with rubber.