JPH0725939U - Crusher - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a crusher having good wear resistance, which enables fine crushing without cutting of chips and wood chips around the fan. [Structure] Wood chips, planks and the like are taken in together with air from a suction unit 4, and the air sucking the wood chips, planks and the like is sent by a fan 2 in the radial direction of the fan, and the holes of the perforated plate 13 are directed toward the centrifugal direction. Through the discharge section to the outside of the duct. The wood chips and the planer chips sucked by the fan 2 are crushed into fine powder when leaving the through holes of the perforated plate 13 and discharged from the discharge portion to the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a crusher for crushing planks, wood chips and the like.

[0002]

[Prior art]

 Conventionally, as a device for crushing canna chips, wood chips, and the like, there is known a device in which a fan is inserted into a scroll-shaped case and is cut by a rotary blade attached to the fan.

[0003]

[Problems to be solved by the device]

 However, according to such a conventional crusher, there is a problem that it is not possible to pulverize planer chips, wood chips, etc. in a sufficiently fine manner, and large chips are wrapped around the fan or clogged with chips. There is a problem that the crusher is likely to malfunction due to such clogging of debris. Further, there is a problem that the rotary blade is significantly worn.

The present invention has been made in order to solve the above problems, and provides a crusher having good wear resistance, which can perform fine crushing without cutting of chips, wood chips, etc. around the fan. The purpose is to do.

[0005]

[Means for Solving the Problems]

 The crusher according to the present invention for solving the above-mentioned problems includes a cylindrical suction part, a guide part whose inner diameter gradually increases on the air downstream side of the suction part, and an air radially outward direction on the air downstream side of the guide part. A case including a scroll portion formed to change the flow and a discharge portion for discharging air from the scroll portion to the outside; a boss portion housed in the scroll portion and formed coaxially with the suction portion; A fan having a plurality of plate-shaped blades whose boss portion extends radially outward, and a disk portion which extends radially outward of the boss portion and connects the non-suction side edge portions of the plurality of blades; And an annular perforated plate having a plurality of through holes arranged concentrically with the fan inside the outer periphery of the fan.

[0006]

[Action]

 According to the crusher of the present invention, wood chips, planks and the like are taken in together with the air from the suction part, and the air sucked in the chips and planks is sent by the fan toward the outside of the fan diameter, and is perforated toward the centrifugal direction. It passes through the through hole of the plate and is discharged to the outside from the discharge part. The wood chips and canna chips sucked by the fan are crushed into fine powder when exiting the through holes of the perforated plate, and are discharged from the discharge section to the outside.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. A crusher to which the present invention is applied is shown in FIGS. 1 and 2. A fan 2 is rotatably provided inside a scroll-shaped case 1, and the fan 2 is rotationally driven by a motor 3 fixed to the outside of the case 1.

The scroll-shaped case 1 includes a cylindrical suction portion 4, a guide portion 5 whose inner diameter increases from the suction portion 4 to the next downstream side, and a scroll portion 7 formed in a scroll shape. And a cylindrical protrusion 8 that discharges air from the scroll portion 7 to the downstream side. The fan 2 is composed of blades 6 provided at equal intervals in the circumferential direction, a boss portion 8 connecting the blades at the center of these blades 6, and a disc 9 connecting the blades 6. The blade 6 has a thin plate-like shape extending in the radially outward direction, and the connection portion with the boss portion 8 on the radially inner side is located on the side opposite to the air suction side, that is, on the motor 3 side. An inclined portion 6a is formed which gradually expands. The straight portion 6b is formed so that the plate width of the blade 6 is uniform in the radial direction from the inclined portion 6a. The inclined portion 6a is inclined so as to efficiently guide the air sucked from the suction portion 4 to the radially outer side of the blade 6. In addition, the case inner diameter is widened from the motor side end of the suction part 4 to the guide part 5 because the air sucked from the suction part 4 can be easily diverted to the radial outside direction and the air flow resistance is reduced. Is.

The disk 9 has a role of fixing the blade 6 and increasing rigidity so as to suppress deformation during rotation. It also has the role of guiding the chips, wood chips, etc. sucked together with the air to the outside of the blade diameter and guiding them so that they do not wind around the blade. A wear-resistant plate 10 is adhered to the surface of the radially outer end of the blade 6 on the rotational direction side. This abrasion resistant plate has a role of increasing the rigidity of the blade 6.

An annular porous plate 13 concentrically formed on the boss portion 8 is fixed to the scroll portion 7 of the case 1. The perforated plate 13 is made of, for example, stainless steel, and has a large number of through holes of, for example, 10 to 20 mm through which air can pass. Canna chips, wood chips, etc. in the air are crushed in the vicinity of the perforated plate 13, and the crushed planks, wood chips, etc. are discharged to the discharge unit 8 together with the air.

According to this embodiment, a negative pressure is generated on the inlet side of the fan 2 due to the rotation of the fan 2, and this negative pressure sucks in air including canna chips, wood chips and the like from the suction section 4. The sucked planks, wood chips, etc. are sucked between the blade 6 and the adjacent blade 6 as shown by the arrow in FIG. 2, and are guided radially outward along the wall surface of the blade, and the perforated plate 13 To the through hole. Canna chips, wood chips, etc. that reach the through hole of the perforated plate 13 are cut into a size that can pass through the through hole by shearing between the circumferential movement of the blade and the air movement in the centrifugal direction intersecting with the blade. Then, the cut wood chips, planer chips, and the like are discharged in the radial direction, and are discharged to the outside from the discharge unit 8 along with the air flow generated by the rotation of the fan 2.

According to the present embodiment, since the planer scraps, wood scraps and the like in the sucked air are guided along the radially outward direction of the disk 9, the wood scraps and planer scraps are caught in the fan 2 There is no clogging. In the past, there was a drawback that most of the long scraps would wind up, but in the present embodiment, the long wood scraps, planer scraps, etc. do not wrap around, and they are placed on the inlet side of the perforated plate 13. Then, the fine particles in the form of fine powder that are cut at the through holes formed in the perforated plate are sent under pressure to the discharge unit 8 together with the air.

According to the present example, the experimental results of the present inventor have revealed that the chips such as planer chips and wood chips are fine powders. It was found that wood chips, etc., became finer powder due to the increase in the rotation speed of the fan. According to the experiment, by relatively setting the through hole diameter of the perforated plate 13, the gap distance between the outermost end of the blade 6 and the perforated plate 13, the number of rotations of the motor 3 and the like, it is possible to reduce relatively large wood chips and planks. Fine powder can be made into small pieces.

According to an experiment conducted by the present inventor, it was found that such fine powder could be obtained by changing the shape, size, etc. of the case, fan, perforated plate. However, it was not clear at this stage what kind of fine powder was obtained, and as a result, such fine powder was obtained, which led to the application for utility model registration. .

Needless to say, the blade shape, the shape of the through holes, the number of holes, etc. of the present invention are not limited to those in the above embodiment.

[0016]

[Effect of device]

 As described above, according to the crusher of the present invention, the fine powder of planer chips, wood chips, etc. can be finely divided, and the fine powder can be formed without being clogged by the planer chips, wood chips, etc. There is an effect.

[Brief description of drawings]

FIG. 1 is a sectional view of a crusher according to an embodiment of the present invention.

FIG. 2 is a crusher according to an embodiment of the present invention, which is A- of FIG.
It is sectional drawing of the A line sectional view.

[Explanation of symbols]

 1 Case 2 Fan 4 Suction Part 5 Guide Part 6 Blade 7 Scroll Part 8 Discharge Part 9 Disc Part 10 Abrasion Resistant Plate 13 Perforated Plate

Claims (1)

[Scope of utility model registration request] 1. A cylindrical suction portion, a guide portion whose inner diameter gradually increases on the air downstream side of the suction portion, and a scroll portion formed to change the air flow radially outward on the air downstream side of the guide portion. And a boss portion housed in the scroll portion and formed coaxially with the suction portion, and a plate shape in which the boss portion extends radially outward. A plurality of blades, and a fan composed of a disk portion extending radially outward of the boss portion and connecting the anti-suction side edge portions of the plurality of blades, inside the case, and on the outer peripheral portion of the fan. A crusher, comprising: an annular perforated plate arranged concentrically with the fan and having a plurality of through holes.