JP2004027324A - Liner and its fitting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and safely perform the exchange of a liner fitted to a position vigorously worn of a hopper, a crusher or the like. <P>SOLUTION: A plurality of bolt-inserting holes penetrated into the front and back surfaces, are arranged in the liner for preventing the wearing etc., by fitting on the machine body surface butted with crushing material etc., and a nut is fitted by arranging recessed part in the back surface side at least one hole among the plurality of bolt-inserting holes, and a hanging bolt is fitted to the liner by screwing the hanging bolt for hanging down the liner into the nut. The liner is hung down with a crane etc., and carried for the fitting/removing by using a wire hung to the hanging bolt. The liner set to a prescribed position of the machine body is fixed to the main body by screwing the nuts on the bolts for fixing inserted into the bolt inserting holes from the back surface side of the machine body. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat-resistant and wear-resistant liner used by being attached to a device such as a crusher and a hopper, and a method of attaching the liner.
[0002]
[Prior art]
In the crushing field, for example, the upper part of the jaw crusher, the chute, the outlet of each bell-con, etc., the mill input chute in the cement field, the raw material hopper, the raw material hopper in the steelmaking field, the blast furnace top, the hopper, the chute, etc. In order to prevent the inside of the main body and the inside of the hopper from being damaged or worn due to the input or crushing of the crushed material, a highly wear-resistant cast liner is attached as a lining material. This type of liner is generally fixed in place with bolts.
[0003]
On the other hand, a caster liner having excellent heat resistance is attached to protect the main body from erosion due to heat even in a high-temperature portion such as a water-gutter liner. This type of heat-resistant liner is often fixed with bolts.
[0004]
Liners attached to various devices such as the above-mentioned hoppers and crushers are worn out during the charging of raw materials into the device, the crushing process, or melted down due to thermal effects. Need to replace the liner that caused it. In this case, since the liner is heavy, it is common to replace the old liner and attach the new liner while suspending the liner when replacing the liner. In other words, in the case of a liner that has already been installed, with the wire hung on the hanging hand, remove the bolts that secure the liner and the device body, remove the liner, take it out, and insert a new liner. Similarly, it is suspended by a wire, set at the mounting position, and fixed with fixing bolts.
[0005]
[Problems to be solved by the invention]
In suspending the liner, it is necessary to provide a suspender for hanging a wire. The hanging hand is provided by, for example, a method of being integrally formed on a use surface of the liner at the time of casting the liner. However, if the hanging hand is integrally formed as described above, there are the following problems. In other words, there is a problem in that if the hanging surface is provided on the use surface of the liner, it becomes a hindrance to transportation and mounting. Moreover, the one integrally formed by casting may damage the hanging hand due to the impact. Further, if the hanging surface is provided on the use surface, the material may hinder the raw material flowing on the use surface, and the flow of the raw material may be biased to cause local wear around the hanging surface.
[0006]
As another method different from the method of integrally forming at the time of the above-mentioned casting, there is a method of attaching a liner to a use surface of a liner using a casting metal (such as SS400) and suspending the liner. This method is a method of embedding a suspender made of SS400 or the like in the upper die and casting it in a liner to form it. However, in this method, there is a problem that a cast metal part is locally worn. . Furthermore, a method of forming a tapped hole in the liner and screwing a suspension bolt is also conceivable, but it is difficult to form the tapped hole due to the high hardness of the liner itself (the processing is impossible due to high hardness). Other than these methods, for example, there is a method of winding a wire around a liner and suspending the wire. However, this method is not practical because it has a high risk.
[0007]
Further, there is a method of suspending the liner by providing a suspender above the liner (see JP-A-2001-254113). However, for example, in a device such as a hopper, a large number of liners need to be attached without a gap (about 5 to 10 mm even if there is a gap). For example, there is a problem that it is not possible to achieve wear prevention). Also, in this case, since it is necessary to manufacture the hanging hand by casting, the same problem as described above occurs.
[0008]
In order to solve the above-mentioned problems, the present invention provides a method for easily hanging a liner without integrally forming a hanging hand on the liner, and aims to facilitate attachment and detachment of the liner. And
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following configuration. That is, the liner according to the present invention is a liner that is attached to the surface of an airframe to which an object such as a crushed object contacts to prevent wear and the like, and a plurality of bolt insertion holes penetrating the liner from front to back. And at least one back surface of the plurality of bolt insertion holes is provided with a recess in which a nut screwed to a suspension bolt for suspending the liner is non-rotatably fitted. I have.
[0010]
Further, in the liner mounting method according to the present invention, in a liner having a plurality of bolt insertion holes, a recess is formed on at least one back surface side of the plurality of bolt insertion holes, and the liner is suspended in the recess. A nut to be screwed into a hanging bolt is attached, a hanging bolt inserted from the surface side of the liner is screwed into the nut, and the hanging bolt is used to suspend the liner with a cargo handling device such as a crane to a predetermined mounting position. And the mounting holes of the fuselage provided at the mounting position are overlapped with the bolt insertion holes, and the fixing bolts are inserted from the front side into the bolt insertion holes into which the hanging bolts are not inserted, respectively. The suspension bolt is removed from the bolt insertion hole in which it is inserted, and a fixing bolt is inserted instead. By tightening screwed a nut, respectively from the back side of, is characterized by fixing the liner to the fuselage.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention illustrated in the drawings will be specifically described. Each of the drawings following FIG. 1 shows an example of a liner according to the present invention. This liner 1 has a rectangular shape, and has bolt insertion holes 2,. A fixing bolt 3 for fixing the liner to a device body such as a hopper is inserted into the bolt insertion hole 2. One of the four bolt insertion holes 2,... (Indicated by A) is also used as a suspension bolt insertion hole. In addition, 1a in FIG. 1 is the front surface (use surface) of the liner, and 1b is the back surface.
[0012]
As shown in FIG. 2, the bolt insertion hole 2 has a body portion 2a having a substantially square shape (each corner portion is rounded), and a bottom portion 2b is narrow, and the bolt insertion hole 2 passes through the portion to the back surface 1b of the liner. A through hole 2c is provided. A circular raised portion 1c is formed at the position of the bolt insertion hole 2 on the back surface 1b of the liner, and the through hole 2c is opened at the center of the raised portion 1c. If the cast liner is distorted, the mounting portion can be easily flattened by cutting the raised portion 1c. The fixing bolt 3 inserted into the bolt insertion hole 2 has a substantially rectangular body 3a having the same cross-sectional shape as the bolt insertion hole 2 and a screw part 3b integrally provided below the body. The lower end 3c of the body 3a is formed in a chamfered shape corresponding to the bottom 2b of the bolt insertion hole.
[0013]
On the other hand, the hanging bolt insertion hole (A) has the same body portion 2a, bottom portion 2b, and through hole 2c as the other bolt insertion holes 2, but the diameter D of the raised portion 1c on the back side is larger than that of the other. A large, substantially rectangular concave portion (lightening portion) 5 is formed in this portion. A rectangular nut 7 is fitted into the recess 5. The nut 7 has a screw hole 7 a into which a screw portion 10 a of a suspension bolt 10 for suspending the liner 1 is screwed. The nut 7 has a rectangular shape that fits into the recess 5. The nut 7 is formed to be thinner than the depth of the concave portion 5 so as not to be exposed on the outer surface of the liner while being fitted into the concave portion 5. The bolt insertion hole 2, the concave portion 5, and the like can be formed at the same time when the liner is cast. The screw hole 7a of the nut 7 has an inner diameter larger than the diameter of the screw portion 3b of the fixing bolt 3, and functions as a stupid hole in which the bolt does not engage with the fixing bolt 3. ing.
[0014]
The suspension bolt 10 for suspending the liner is screwed to the nut 7 and fixed to the liner, and has a hook-shaped or ring-shaped locking portion on which a wire can be hung. I just need. It is economical to use a commercially available eye bolt specified by JIS or the like as the suspension bolt. In addition, since the outer shape of the nut with which the suspension bolt 10 is screwed is rectangular and is fitted in the similar rectangular concave portion 5, the nut does not rotate (idle) when the suspension bolt 10 is screwed. It can be screwed securely.
[0015]
Next, a method of replacing the liner 1 will be described. For example, when a liner attached to the apparatus main body M such as a hopper is worn out, the liner is removed and a new liner is attached. In this case, first, the fixing bolts 3 of the attached old liner are removed. Must be removed. In this case, the nut 12 screwed to each fixing bolt 3 may be removed on the back side of the body to which the liner of the apparatus body is fixed, and the fixing bolt may be removed.
[0016]
On the other hand, after removing the fixing bolt 3 inserted in the suspension bolt insertion hole 2 (A), the suspension bolt 10 is inserted instead and screwed to the nut 7. Since the suspension bolt 10 does not have a body part having a large diameter like the fixing bolt 3, the shaft part (screw part) of the suspension bolt 10 is large so that the suspension bolt 10 does not tilt or wobble in the insertion hole 2. It is preferable that a bush 15 having a through hole that fits without play is fitted near the entrance of the bolt insertion hole 2, and the suspension bolt 10 is inserted through the bush 15. When the suspension bolt 10 is screwed and fixed to the nut 7, a wire W is hung on the ring portion 10b of the suspension bolt 10, and the wire is suspended by a cargo handling device such as a crane and moved to the outside. Since it is dangerous if the liner falls off before the liner is hung, it is preferable that each fixing bolt 3 is pulled out after the liner is hung and supported by a wire hung on the hanger bolt 10.
[0017]
On the other hand, the suspension bolt 10 is inserted into the suspension bolt insertion hole 2 (A) of the new liner via the bush 15 and screwed to the nut 7 fitted in the recess 5. A wire is hung on the ring portion 10a of the hanging bolt 10, the wire is hung by a crane or the like, carried to a mounting position of the apparatus main body such as a hopper, and the fixing bolt 3 is inserted into the remaining bolt insertion hole 2, and the apparatus main body is removed. The fixing nut 12 is screwed together with the washer 11 from the back side of the machine body while being inserted into the bolt insertion hole 17. At this stage, the nut 12 may be loosely screwed in such a way that the fixing bolt 3 does not come off, and may be temporarily fixed.
[0018]
As a result, the liner 1 is held by the apparatus body so as not to fall off. Next, the hanging bolt 10 is pulled out from the insertion hole 3 (A) of the liner, and the fixing bolt 3 is inserted instead. The screw portion 3b of the fixing bolt 3 is thinner than the screw hole 7a of the nut 7, and projects directly to the back side of the apparatus body without being screwed to the nut 7, so that the washer 11 is fitted into the screw portion 3b. The fixing nut 12 is screwed. In this case, since the nut 7 is held in the recess 5, there is no need to remove it, and the fixing bolt 3 may be inserted as it is. Thereafter, when all the fixing bolts 3,... And the nuts 12,... Are tightened, the liner 1 is firmly fixed to the apparatus main body.
[0019]
Since the liner 1 is attached to the apparatus main body with the nut 7 embedded in the concave portion 5, when the liner 1 is replaced due to wear or damage of the liner, the liner 1 is inserted into the suspension bolt insertion hole 2 (A). The liner can be suspended by removing the fixing bolts 3, inserting the suspension bolts 10 and screwing into the nuts 7 fitted in the recesses 5. For this reason, the liner can be easily removed.
[0020]
Next, when a liner having a special shape (for example, a curved liner) 1 ′ is hung instead of the liner having a relatively simple shape as described above, if only one hanger bolt 10 is used to suspend the liner, Depending on the position, as shown in FIG. 7, the liner 1 ′ may be inclined and difficult to fix. In such a case, the suspension bolt insertion holes 2 (A) may be provided at a plurality of locations (usually two locations are sufficient) and may be suspended by a plurality of suspension bolts.
[0021]
【The invention's effect】
As is clear from the above description, according to the present invention, it is not necessary to provide projections or the like on the liner surface, so that it does not hinder the flow of raw materials, crushed materials, and the like, and is easy to load when the liner is transported. Yes, small volume. Further, even when replacing the liner in a place with a poor scaffold, it is only necessary to attach and detach the bolts, which is safe. Furthermore, since the insertion holes for the fixing bolt and the suspension bolt can be made common, the bolt insertion hole at any position can be used as a hole for mounting the suspension bolt, and the liner is hung at an appropriate position in consideration of the shape of the mounting portion and the like. It is possible. In addition, by making the shape and dimensions of the suspension bolts common, the cost can be reduced. In addition, since the hanging nut is fixed to the liner while being embedded in the liner, the nut can be reused at the time of removal, and the liner can be replaced safely and easily.
[Brief description of the drawings]
FIG. 1A is a plan view of a liner and FIG.
FIG. 2 is a plan view (a), a sectional view (b), and a bottom view (c) of a bolt insertion hole for a suspension bolt.
FIG. 3 is a front view of a fixing bolt.
FIG. 4 is a sectional view (a) and a bottom view (b) showing a hanging bolt mounting state.
FIG. 5 is a cross-sectional view illustrating a state in which hanging bolts are attached for liner removal.
FIG. 6 is a cross-sectional view illustrating a state in which a new liner is carried into an installation position and temporarily fixed.
FIG. 7 is an external view showing a part in a cross section in a state where a deformed liner is suspended.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liner 2 Bolt insertion hole 3 Fixing bolt 5 Recess 7 Nut for hanging bolt 10 Hanging bolt 11 Washer 12 Nut for fixing bolt

Claims (4)

A liner used to prevent abrasion or the like by being attached to the surface of an airframe with which an object such as a crushed object comes into contact. A liner, characterized in that a recess is formed on at least one back surface of the holes so that a nut screwed to a suspension bolt for suspending the liner is fitted non-rotatably. The liner according to claim 1, wherein the outer shape of the concave portion in which the nut screwed to the suspension bolt is fitted is rectangular. In a liner having a plurality of bolt insertion holes, a recess is formed on at least one back surface side of the plurality of bolt insertion holes, and a nut screwed to a suspension bolt for suspending the liner is attached to the recess. The suspension bolt inserted from the surface side of the liner is screwed into the nut, the liner is suspended by a cargo handling device such as a crane by the suspension bolt, and is conveyed to a predetermined mounting position. The mounting hole of the machine body and the bolt insertion hole are overlapped, and a fixing bolt is inserted from the front side into a bolt insertion hole into which the suspension bolt is not inserted, and the suspension bolt is inserted into the bolt. Remove from the insertion hole, insert a fixing bolt instead, and screw a nut to each of these fixing bolts from the back side of the aircraft and tighten By kicking it, attachment method of the liner, characterized in that to fix the liner to the fuselage. 4. The method according to claim 3, wherein a commercially available eyebolt is used as the suspension bolt.

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