JP6426448B2 - Pulverized dust collector - Google Patents

Description

  The present invention relates to a pulverizing and collecting apparatus for pulverizing various powders such as pharmaceuticals, agricultural chemicals, metals, chemical substances and the like into fine particles and recovering fine powders.

  DESCRIPTION OF RELATED ART Conventionally, what was described in following patent document 1 as a jet crusher is known. In this jet crusher, as shown in FIG. 8, a pulverizing chamber 52 is formed inside a casing 51, and nozzles 53 and 54 are arranged on a peripheral wall of the casing 51. Powder of raw material stored in a hopper 60 The body is jetted and supplied from the nozzle 53 to the inside of the pulverizing chamber 52, and high pressure air is jetted from the nozzle 54 to the inside of the pulverizing chamber 52 to cause particles of powder to collide with each other. And pulverize the powder into fine powder.

  The casing 51 of the jet crusher includes a cylindrical crushing casing 55 and a classification chamber cover 56 provided at the upper part thereof. A liner 57 is attached to the inner periphery of the crushing casing 55, and A space is taken as a grinding chamber 52. Inside the classification chamber cover 56, a ring-shaped member 58 whose inner and outer peripheral surfaces are tapered is provided, and a classification chamber 59 is formed by the classification chamber cover 56 and the ring-shaped member 58.

  An air feed pipe 61 is connected to the rear end of the nozzles 53 and 54, and the air feed pipe 61 is connected to an air supply pipe 62 disposed below the casing 51. At the center of the top wall of the classification chamber cover 56, a fine powder discharge cylinder 63 is attached to which fine powder to be a product is discharged upward.

Unexamined-Japanese-Patent No. 11-179228

  By the way, in the jet crusher as described above, the fine powder discharge cylinder is connected by a pipe to a dust collector installed apart from the jet crusher, and the fine powder is recovered by the dust collector. For this reason, the distance to recovery of the pulverized fine powder is long, the surface area of the inner surface of the pipe in contact with the fine powder becomes large, and recovery loss due to adhesion of the fine powder to the inner surface of the pipe occurs considerably. There is a problem that it takes time for cleaning.

  Therefore, it is an object of the present invention to reduce the recovery loss of fine powder pulverized by a jet crusher and to reduce the time for disassembly and cleaning of the entire apparatus.

  In order to solve the above problems, according to the present invention, a pulverizing chamber is formed inside a casing, and a nozzle for supplying raw material powder to the pulverizing chamber on the peripheral wall of the casing, and a nozzle for injecting high pressure air into the pulverizing chamber The dust collector is integrally connected to the lower side of a jet crusher which crushes powder with high pressure air inside the crush chamber, and the dust collector is a cylindrical dust filter through which air does not pass and fine dust does not pass. And a dust collection case having a larger diameter cylindrical shape and a dust collection filter inserted inside, and a chamber member attached to the lower end of the dust collection case, and the inside of the dust collection filter is crushed by a jet crusher The exhaust port of the chamber communicates with the interior to separate the inside and the outside of the dust collection filter, the inside of the chamber member is a chamber for collecting fine powder, and air is discharged from the space between the dust collection filter and the dust collection case to the outside Things Than it was.

  In the jet crusher to which the dust collector is connected, the casing is composed of a casing main body forming a bottom surface portion and a peripheral surface portion of the crushing chamber, and an upper casing liner forming a top surface portion of the crushing chamber. An opening communicating with the crushing chamber is provided in the upper part, and ridges and recesses are alternately formed in the circumferential direction on the inner peripheral side of the opening of the casing main body and the outer peripheral side of the upper casing liner, When mounting the upper casing liner to the casing body, inserting the upper casing liner into the opening of the casing body, passing the weir through the mutual recesses and rotating the upper casing liner with respect to the casing body, The casing body and the upper casing liner are engaged with each other.

  In the pulverizing and collecting apparatus according to the present invention, the jet crusher and the dust collector are directly connected, and the fine powder discharged downward with the air from the discharge port of the jet crusher is sent downward inside the dust collection filter and collected. Since the dust filter is lowered without passing through the dust filter and accumulated in the chamber, the loss of fines is reduced and the recovery amount is smaller than when piping is connected to the jet crusher and the chamber installed separately. Will increase. Moreover, since the connection part of components reduces and it becomes a simple structure, the effort which disassembly and assembly and cleaning require is reduced.

The perspective view which shows embodiment of the pulverization dust collector concerning this invention An exploded perspective view of the above-mentioned crushing dust collector A schematic vertical front view of the above-mentioned crushing dust collector A schematic vertical front view of the jet crusher same as above Top view of jet crusher same as above Transverse top view of casing body of jet crusher same as above Longitudinal front view which shows other embodiment of the pulverization dust collector concerning this invention Longitudinal front view showing a conventional jet crusher

  Hereinafter, embodiments of the present invention will be described based on the attached drawings.

  The pulverizing and collecting apparatus shown in FIGS. 1 to 3 is configured such that a dust collector is integrally connected below the jet crusher.

  As shown in FIGS. 4 to 6, the casing 1 of this jet crusher has the crushing chamber 2 formed therein, and the casing main body 3 forming the bottom portion and the peripheral surface portion of the crushing chamber 2; An upper casing liner 4 is formed to form a top surface portion of the chamber 2. The supply ring 21 is detachably mounted on the casing body 3.

  The casing main body 3 is formed into a flat surface by cutting off both sides of a cylinder, and an opening 5 having a cylindrical inner peripheral surface is formed in the upper portion of the casing main body 3 in communication with the crushing chamber 2 It is done. On the inner periphery of the upper end portion of the opening 5, four inward protruding ridges 6 are formed at equal intervals in the circumferential direction, and a recess 7 is formed between the ridges 6.

  The upper casing liner 4 is formed on the outer periphery of a cylindrical lower portion with four outwardly projecting ridges 8 equally spaced in the circumferential direction, and a recess 9 is formed between the ridges 8 There is. An upper portion of the upper casing liner 4 is a knob 10 which is shaped so as to be easily gripped by a finger.

  When mounting the upper casing liner 4 to the casing main body 3 as described above, the lower portion of the upper casing liner 4 is inserted into the opening 5 of the casing main body 3 and the ridges 6, 8 are formed through the recesses 7, 9 with each other. The upper casing liner 4 is rotated about 45 ° with respect to the casing body 3. Along with this, the ridges 6 and 8 overlap, and the casing body 3 and the upper casing liner 4 are locked.

  An O-ring 11 is fitted in a circumferential groove formed on the outer periphery of the upper casing liner 4 below the ridge 8 and the recess 9, whereby the opening 5 of the casing main body 3 and the upper casing liner 4 Between the outer circumference of the

  A nozzle 12 for supplying raw material powder to the crushing chamber 2 together with high pressure air is attached to one side surface of the casing main body 3, and high pressure air is injected to the crushing chamber 2 on the other side surface of the casing main body 3 The nozzle 13 is attached. The tips of the nozzles 12 and 13 are directed tangentially to the outer periphery of the grinding chamber 2.

  The nozzles 12 and 13 are provided with a seat 14 along the side surface of the casing main body 3 by screwing the bolt 15 into the screw hole of the casing main body 3 through the through hole of the seat 14. It is fixed to the casing main body 3. The seat portion 14 and the side surface of the casing body 3 are sealed by an O-ring 16 fitted in an annular groove of the seat portion 14.

  A tube joint 17 is attached to the rear end of the nozzles 12 and 13 located outside the casing main body 3, and a tube 41 for feeding high-pressure air is connected to the tube joint 17.

  The nozzle 12 is provided with a supply port 18 at an upper portion in front of the tip, and the supply port 18 is in communication with a supply path 19 directed to the upper surface of the casing main body 3.

  An annular fitting groove 20 is formed around the opening 5 on the top surface of the casing main body 3, and the supply passage 19 is opened at the bottom of the fitting groove 20. The supply ring 21 is rotatably fitted in the fitting groove 20 in the circumferential direction. In the supply ring 21, four arc-shaped holes 22 are arranged in the circumferential direction with the partition wall 23 as a boundary, and four claws 24 are provided in a protruding manner on the outer periphery.

  The lower end of the hopper 42 for storing the raw material powder is located above the arc-shaped hole 22 so that the powder falls from the hopper 42 to the arc-shaped hole 22.

  A discharge port 25 for discharging fine powder is formed in the center of the bottom of grinding chamber 2 at the inside of the cylindrical build-up to prevent the outflow of coarse powder, and discharge port 25 is tapered downward. And is open at the lower surface of the casing body 3.

  In a groove formed on the inner periphery of the discharge port 25 in the vicinity of the lower end of the casing main body 3, a packing 26 for sealing between the dust collection filter 30 described later is fitted. A flange 27 is formed to connect a dust collection case 31 described later.

  In the jet crusher, pulverization of the raw material powder is performed in a state in which high-pressure air fed from the air supply pipe 41 is jetted from the nozzles 12 and 13 to the crushing chamber 2 through the tube joint 17.

  In the grinding process, the powder is dropped from the hopper 42 into the arc-shaped hole 22 of the supply ring 21, and the claw 24 is used to rotate the supply ring 21, and the powder in the arc-shaped hole 22 is pushed by the partition wall 23 Drop it on 19 The amount of powder to be supplied is regulated by the internal volume of the circular hole 22. The powder dropped into the supply path 19 enters the nozzle 12 from the supply port 18 of the nozzle 12 and spouts from the tip of the nozzle 12 into the crushing chamber 2 together with high pressure air.

  Inside the grinding chamber 2, a swirling flow is generated by high pressure air injected from the nozzles 12 and 13, and the powder swirling inside the grinding chamber 2 thereby collides with the high pressure air and the particles mutually Is crushed by the collision of

  Among the pulverized materials thus pulverized, fine powder having a small particle size moves to the center side of the pulverizing chamber 2 and is discharged downward from the discharge port 25, and the coarse powder having a large particle diameter is The turning continues on the outer circumference side, and it is further crushed.

  The jet crusher can be assembled simply by forming the casing 1 from the casing body 3 and the upper casing liner 4 and inserting the upper casing liner 4 into the opening 5 of the casing body 3 and rotating it; Since it can be disassembled by the procedure, it can be easily disassembled, cleaned, and assembled, for example, when changing the type of powder to be ground. For this reason, it becomes a thing suitable for many kinds of fine powder manufacture.

  In addition, as shown in FIGS. 1 to 3, the dust collector connected to the lower side of the jet crusher has a cylindrical dust collection filter 30 and a cylindrical shape having a larger diameter than this, and a space is formed inside the peripheral wall. A dust collection case 31 into which the dust collection filter 30 is inserted, and a chamber member 32 whose upper part attached to the lower end of the dust collection case 31 has a plate shape are configured.

  A flange 33 is formed on the outer periphery of upper and lower end portions of the peripheral wall of the dust collection case 31, and an exhaust cylinder 34 is provided at an intermediate portion in the height direction of the peripheral wall. In a groove formed on the lower end side inner periphery of the dust collection case 31, a packing 35 for sealing between the dust collection filter 30 and the groove is fitted.

  In the chamber member 32, the inside of the plate-like portion is a chamber 36 for receiving the fine powder, and a flange 37 is formed on the upper outer periphery. The dust collection case 31 and the chamber member 32 are fixed by abutting the flanges 33 and 37, fitting a seal packing 38 in an annular groove of the abutting surface, and sandwiching the flanges 33 and 37 with each other by a clamp 39.

  Then, in order to connect such a dust collector to the jet crusher, the flange 27 at the lower end of the casing main body 3 and the flange 33 at the upper end of the dust collection case 31 are butted and the annular groove in the abutting surface is used for sealing. The gaskets 38 are fitted, and the flanges 27 and 33 are held together by clamps 39 to fix them, and the exhaust pipe 43 is connected to the exhaust cylinder 34.

  As described above, in the pulverizing and collecting apparatus in which the jet crusher and the dust collector are directly connected, the fine powder discharged downward with the air from the discharge port 25 of the jet crusher is sent downward inside the dust collection filter 30 and collected. Since the dust filter 30 is lowered without passing outside and accumulated in the chamber 36, the loss of fines is less and the amount of recovery is smaller than when piping is connected to the jet crusher and the chamber installed separately. Become more. Meanwhile, air passes through the dust collection filter 30, is exhausted from the exhaust cylinder 34 of the dust collection case 31, and is sent to the exhaust pipe 43.

  In the above embodiment, as the jet crusher, the casing 1 includes the casing main body 3 and the upper casing liner 4 as an example. However, as shown in FIG. It is also good.

  The casing 1 of the jet crusher fixes the cup-shaped outer casing member 3a and the annular inner casing member 3b fitted therein by butting their respective flanges with a clamp 39 to secure the inner casing member The lower liner member 4a and the upper liner member 4b are sequentially fitted into the inside of 3b, and the space between the lower liner member 4a and the upper liner member 4b is used as the grinding chamber 2.

  Then, the cover member 4c is covered on the upper liner member 4b, these are integrated by screwing in the butterfly bolt 44, and the nut portion 45a of the fixing member 45 is screwed on the fixing bolt 46 The rod portion 45b of the fixing member 45 is engaged with the pin 47, and the fixing bolt 46 is rotated to bring the upper liner member 4b into close contact with the lower liner member 4a.

  Such an arrangement is suitable for jet mills that are relatively large and do not frequently change the type of powder being milled.

Reference Signs List 1 casing 2 crushing chamber 3 casing main body 3a outer casing member 3b inner casing member 4 upper casing liner 4a lower liner member 4b upper liner member 4c cover member 5 opening 6, 8, 7 7, 9 recess 10 knob 10 O-ring 12 , 13 nozzle 14 seat portion 15 bolt 16 O ring 17 tube joint 18 supply port 19 supply passage 20 fitting groove 21 supply ring 22 arc shaped hole 23 partition wall 24 claw 25 discharge port 26 packing 27 flange 30 dust collection filter 31 dust collection case Reference Signs List 32 chamber member 33 flange 34 exhaust cylinder 35 packing 36 chamber 37 flange 38 packing 39 clamp 41 pipe 41 hopper 43 exhaust pipe 44 butterfly bolt 45 fixing member 45 a nut 45 b rod 46 fixing bolt 47 hook

Claims (1)

A grinding chamber (2) is formed inside the casing (1 ) , a nozzle (12) for supplying powder of the raw material to the grinding chamber (2) on the peripheral wall of the casing (1), high pressure to the grinding chamber (2) A dust collector integrally connected to the lower side of a jet crusher for pulverizing powder with high-pressure air inside the pulverizing chamber (2), and
The jet crusher includes a casing main body (3) forming a casing (1), a bottom surface portion, a peripheral surface portion and a peripheral side portion of a top surface portion of the crushing chamber (2); An upper casing liner (4) forming a central side portion, and an opening (5) communicating with the central side portion of the top surface portion of the grinding chamber (2) is provided in the upper portion of the casing main body (3)
On the inner peripheral side of the opening (5) of the casing main body (3) and the outer peripheral side of the upper casing liner (4), the ridges (6, 8) and the recesses (7, 9) are alternately arranged in the circumferential direction Form
When mounting the upper casing liner (4) to the casing body (3), the upper casing liner (4) is inserted into the opening (5) of the casing body (3), and the mutual recesses (7, 9) When the upper casing liner (4) is rotated with respect to the casing main body (3), the ridges (6, 8) overlap with each other to form the casing main body (3) and the upper casing. There is formed a grinding chamber (2) in which the liner (4) is engaged and the opening (5) of the casing body (3) is sealed by the upper casing liner (4),
The dust collector is a cylindrical dust collection filter (30) through which fine powder does not pass and air passes, and a dust collection case (31) into which the dust collection filter (30) is inserted inside with a cylindrical shape having a larger diameter than this. And the chamber member (32) attached to the lower end of the dust collection case (31), the inside of the dust collection filter (30) is communicated with the discharge port of the grinding chamber (2) of the jet crusher, The interior of the filter (30) is separated from the exterior, the inside of the chamber member (32) is a chamber (36) for collecting fine powder, and the space between the dust collection filter (30) and the dust collection case (31) Pulverized dust collector characterized in that air is discharged.

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