JPH0243491Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention uses crushed stone or gravel (with a grain size of about 15 mm, for example) that is intermediate in size between sand and gravel, commonly referred to as grain gravel. In a sand making machine that makes sand by inserting it into a rotating drum equipped with a large number of rods and crushing it with the rods, a liner is provided on the inner peripheral wall of the rotating drum to allow the rods to move efficiently. It is related to.

(Prior Art) First, in order to facilitate understanding, a general sand making machine of this type will be explained based on Fig. 1. The sand making machine shown in the figure is of a type generally called a rod mill. 1 is a machine frame, 2 is a plurality of pairs of trochanters made of rubber tires with a wheel structure mounted on the machine frame 1, and 3
1 and 2 respectively show rotating drums rotatably supported by a trochanter 2. A large number of rods 4 are inserted into the trochanter 2, and an electric motor 5 as a rotational drive source drives the rotation of each trochanter 2. connected to transmit force. Then, the raw ore and water put into the hopper 6 flow into the rotating drum 3 from the raw ore input port 8 via the raw ore supply device 7, and the raw ore is crushed by each rod that moves freely due to the rotation of the rotary drum 3. This sand becomes sand and is discharged from the discharge port 9 of the rotating drum 3. In addition, 10, 11
1 and 2 respectively show side wall plates for closing both sides of the rotating drum 3.

By the way, as the rotating drum 3 rotates, each rod 4 is lifted sufficiently high to crush the raw ore more efficiently.For this purpose, the liner 12 is inserted into the rotating drum 3 as shown in FIGS. 2 and 3. It is laid along the entire surface of the peripheral wall in the axial direction. Each of the liners 12 is a long metal plate bent to have approximately the same curvature as the inner wall of the rotating drum 3, and has a shape in which the intermediate portion in the short direction protrudes in a semicircular cross section along the longitudinal direction. As shown in FIG. 3, three liner bodies 1 are arranged along the axial direction of the rotating drum 3.
2 are arranged in a line and are attached, and as the rotary drum 3 is driven to rotate, the protrusions 1 having a semicircular cross section are
Each rod 4 is locked and lifted by 2',
People are now being forced to migrate.

However, in the process of lifting and floating the rod 4 by the protrusion 12' of the liner 12 as the rotating drum 3 rotates, the protrusion 12' wears out due to collisions and sliding contact with the rod 4. This is noticeable on both sides of the rotating drum 3, and is very small in the center, resulting in an extremely high mountain in the center, which causes the rods to vary and reduce the efficiency of crushing the raw ore.
There is an inconvenience that the liners on both sides must be replaced frequently.

Therefore, as a means to solve these problems,
For example, the one disclosed in Japanese Patent Publication No. 58-15020 is known.

This technology is a type of mill that has a liner with a discharge port in the center in the circumferential direction of the mill body. The diameter of the liner base and lifter is reduced evenly over the entire length, thereby reducing the wear of the liner base and lifter due to the rod.

In this way, the aim was to alleviate the curvature of the rod by uniformly wearing the liner base and lifter, thereby extending the service life of the liner and improving crushing efficiency.

(Problem to be solved by the invention) However, when the above-mentioned solution is adopted, even if the liner wears out evenly, it is difficult to expect an appropriate lifting effect on the rod, and the periphery of the discharge port Since it is necessary to form a cone-shaped slope, there is a drawback that the cost is high. Moreover, since the cone-shaped slope is formed only at the periphery of the discharge port, the liner as a whole is attached as is, which does not reduce the weight of the entire rod mill, and therefore requires a large amount of operating energy. Therefore, there was a problem in that it was not possible to improve the crushing efficiency.

In view of the above-mentioned drawbacks of the prior art, the present invention is a sand making machine that reduces the weight of the liner and reduces the operating energy of the entire device while obtaining an appropriate lifting effect on the rod regardless of the progression of liner wear. The purpose is to provide a liner.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a long plate-shaped liner that is divided in the axial direction of the rotating drum and has a lifter part on the inner circumferential wall of the rotating drum. A liner for a sand machine configured to crush non-crushable materials by accommodating a large number of rods in the rotating drum, each of which has a plurality of rods attached thereto, wherein the liner element is connected to the axis of the rotating drum. main lifter parts 16a, 19a are provided protruding only on the liner bodies 13, 15 located at both ends in the axial direction of the rotating drum;
Liner bodies 13, 15 located at both ends of these
The lifter parts 21, 16b, 19b of all the liner bodies 14 located between the liner bodies 13, 15 located at both ends, including a part of the liner bodies 13 and 15, are configured to be so low that they do not function as lifters. be.

(Function) In other words, the inventor of the present invention found out from various experimental results that the reason why the lifter portion of the conventional liner body is extremely worn at both ends in the axial direction of the rotating drum is because of the axial direction of the rotating drum. It was discovered that the central part did little to lift the rod.

In other words, since it is obvious that normally long rods cannot be balanced in the axial direction when the rotating drum rotates, it is natural that both ends of the rod pitch or yaw vertically or horizontally, and as a result, It was found that the lifter portion of the liner body causes intensive wear on both ends of the rotating drum in the axial direction.

The above-mentioned solution taken based on this knowledge eliminates the central part of the liner body that does not contribute to the lifting action, and allows sufficient lifting action to be imparted to the rod only at both ends.
By eliminating unnecessary lifters, a significant weight reduction can be achieved, and efficient crushing can be achieved with less power.

(Embodiments) Hereinafter, preferred embodiments of this invention will be described in detail with reference to the drawings.

In FIGS. 4 to 6 showing one embodiment,
Reference numerals 13, 14, and 15 shown in FIG. 4 are three types of liner bodies arranged in a line along the axis direction of the rotating drum 3. First, as shown in FIG.
Regarding No. 3, it is made of manganese steel and has a flat rectangular shape with its short side bent at a curvature that is approximately equal to the curvature of the rotating drum 3. A lifter portion 16 having a substantially rectangular cross section along the longitudinal direction is provided protrudingly.
6a and a sub-lifter part 16b having a height approximately half that of the main lifter part 16a are formed in each half in the longitudinal direction, and the rear half of the main lifter part 16a is inclined downward with respect to the rotating direction of the main lifter part 16a. is formed to save on materials. Furthermore, a recess 17 is formed on the back surface of the liner body 13, that is, on the mounting surface to the rotating drum 3, excluding the peripheral portion, and
Two pieces are attached to the main lifter part 16a, and the subordinate lifter part 16b
One mounting hole 18 is formed in each.

The third liner body 15 has a plane symmetrical shape with the first liner body 13, and 19a is a main lifter portion;
Reference numeral 19b indicates a sub-lifter portion, and reference numeral 20 indicates a recess 20. The second liner body 14 is connected to the secondary lifter portion 16 of the first and third liner main body portions 13 and 15.
b, 19b A sub-lifter portion 21 having the same shape is provided protruding along the longitudinal direction at the center portion in the lateral direction, and has a concave portion 22 formed in the lower surface.

23, 24, 25 are respective recesses 1 of the first to third liner bodies 13, 14, 15.
7, 22, and 20 are shown, and any of the rubber plates 23, 24, 25 are fitted in the recess 1.
As is clear from FIG. 5, the main body inserted into the recesses 17, 22, 20 has a thickness slightly larger than the depth of the recesses 17, 22, 20.
Additional portions 23', 24' and 25' having a thickness corresponding to the uninserted portions 22 and 20 are formed to extend integrally from the periphery of the main body portion.

Then, the first and third liner bodies 13,1
5 are positioned on both sides of the rotating drum 3, with each main lifter part 16a, 19a facing outward, and a second liner element is positioned between the two liner elements 13, 15 and arranged in a line, As shown in FIG. 6, this arrangement is arranged in parallel along the axial direction of the rotary drum 3 and laid on the inner circumferential wall of the rotary drum 3 with almost no room left.

The liner of the present invention having the above structure has tall and wide main lifter parts 16a and 19a disposed on both sides of the rotating drum 3, which are subject to the most wear due to collision and sliding contact with the rods 4. Unlike conventional products, the rod 4 does not become unstable due to wear due to the height of the mountain in the center, and the rod 4 can be lifted and moved in a stable state at all times. can last for a long time. In addition, since the secondary lifter parts 16b, 21, 19b with low peaks are arranged in the central part, the rotating drum 3 is protected even in areas where there is very little wear, and the liner body 14 in the middle is Liner body 13 on both sides,
It is sufficient to replace it about once every 2 to 3 times in 15.

To summarize the above embodiment, the inner peripheral wall of the rotating drum is divided in the axial direction of the rotating drum, and
A liner for a sand making machine, which is configured to include long plate-shaped liner bodies each having a lifter portion, and to house a large number of rods in the rotating drum to crush non-crushable materials, the liner comprising: The elemental body,
The rotating drum is divided in a direction perpendicular to the axial direction, and only the liner bodies 13 and 15 located at both ends of the rotating drum in the axial direction are provided with main lifter parts 16a and 19a protrudingly, Including parts of the liner bodies 13 and 15 located at both ends, the liner bodies 13 and 15 located at both ends,
This means that the lifter portions 21, 16b, 19b of all the liner bodies 14 located between 15 and 15 are configured to be so low that they do not perform the lifter function.

It should be noted that this invention is not limited to the above-mentioned embodiments; for example, the liner body may have a length approximately equal to the total length of the rotating drum, and main lifter portions may be formed at both ends. It is.

(Effects of the invention) According to the invention, the weight of the liner body can be significantly reduced while sufficient lifting action can be imparted to the rods, which has the advantage of significantly reducing the operating cost of the rotating drum. be. and,
Since the wear occurs only at both ends of the liner body in the axial direction of the rotating drum, it goes without saying that the unbalanced lifting effect on the rod caused by the biased wear of the conventional lifter section will not occur at an early stage. , an efficient lifting action can be expected over a sufficiently long period of time, and there is also the advantage that the liner element can be replaced at longer intervals.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of a general sand making machine to which this invention is applied, Figures 2 and 3 are a side view and a partial front view of a conventional liner, and Figures 4 and below are of this type. An example of the invented sand machine liner is shown,
Figure 4 is a partial front view, Figure 5 is a partial perspective view,
FIG. 6 is a side view. 3... Rotating drum, 4... Rod, 10, 11
... Side wall plate, 13, 14, 15 ... Liner body, 16a, 19a ... Main lifter part, 16a,
19a, 21...Sub lifter section.

Claims (1)

[Scope of utility model registration request] A long plate-shaped liner body which is divided in the axial direction of the rotary drum and has a lifter portion is attached to the inner circumferential wall of the rotary drum, and a large number of rods are accommodated in the rotary drum to form a non-contact rod. A liner for a sand machine configured to crush crushed materials,
The liner element is divided in a direction perpendicular to the axial direction of the rotating drum, and liner elements 1 are located at both ends in the axial direction of the rotating drum.
The main lifter portions 16a, 19a are provided protruding only at 3, 15, including a part of the liner bodies 13, 15 located at both ends thereof, and located between the liner bodies 13, 15 located at both ends thereof. Lifter parts 21, 16b, 19 of all liner bodies 14
A sand machine liner characterized in that b is configured to be so low that it does not exhibit a lifter function.