JP2002119882A - Cover gap adjustment device, and jet mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opposed-jet impact type jet mill having a cover gap (the gap between the lower end face of a classification rotor of a cover of the mill and the opening of a pulverized and classified powder conveyance means of a main body of the mill) adjustment device, which is capable of being used for pulverization, classification, etc., of a powder and easily performing adjustment of the above gap and also by which a pulverized and classified powder hardly contaminated with impurities can be obtained. SOLUTION: This mill is provided with: a cover 20 having a classification rotor 4 which is used for classifying a raw material powder pulverized with high-pressure gas streams opposed to each other and connected to a main body of the cover 20 in a upwardly and downwardly movable manner and provided at its lower end with a flat face 4f perpendicular to a rotary shaft 4b and also with an exposed flat face 4a that is positioned outside the main body of the cover 20 so as to be opposite and parallel to the face 4f; a pulverizer main body 10 having within it, a powder conveyance means 5 which is provided with an opening 5a that is formed opposite and parallel to the face 4f and used for introducing the powder classified with the rotor 4, and intended for conveying the power introduced through the opening 5a; and a displacement measurement means 30 for measuring the distance between the means 30 itself and the exposed flat face 4a and determining the difference of the measured distance from an initially set distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure air-flow type pulverizer of a face-to-face collision type, which is used for pulverization and classification of powders, is easy to adjust a gap, and contains little impurities. The present invention relates to a cover gap adjusting device capable of easily adjusting a gap of the device.

[0002]

2. Description of the Related Art Face-to-face collision type high-pressure air-mills have a pulverizing ability (crushing ability) and a classifying ability and have been widely used in various fields. By pulverizing (pulverizing) the powder to obtain a fine powder having a small powder diameter distribution, a high-density ceramic sintered body can be obtained. In general, the high-pressure air-flow type pulverizer generally includes a classifying rotor for classifying raw material powder pulverized by an opposing high-pressure air flow, and powder conveying means for introducing the powder classified by the classifying rotor from an opening and conveying the powder to the outside. And The classifying rotor is provided on a lid that is openably and closably connected to the apparatus main body for reasons such as convenience of maintenance at the time of wear, and the opening in the powder conveying means is provided inside the apparatus main body. In use, they are housed inside the apparatus main body, and the inside of the apparatus main body is sealed by a lid.

[0003] In the high-pressure air-flow type pulverizer, raw material powders collide with each other with a strong impact force by opposing high-pressure airflows to be pulverized (pulverized). Finely pulverized (crushed) to specified particle size
The raw material powder is not repelled to the outside of the rotating classifying rotor, enters and passes through the inside of the classifying rotor, passes through the opening in the powder conveying means, is conveyed to the outside, and is classified. You. The raw material powders are caused to collide with each other by the high-pressure airflow until they reach a predetermined particle size, and are pulverized (crushed). In the high-pressure air-flow type pulverizer, the pulverization (pulverization) and classification of the raw material powder are performed by the above processes. In the high-pressure air-flow type pulverizer, only the fine powder pulverized (pulverized) to a predetermined particle size by the classification rotor needs to be transported to the outside and classified. It is necessary that the openings of the body transporting means are opposed to and close to each other, and an adjustment is made so that the gap between the classifying rotor and the openings is only about 0.2 mm. Is required.

However, in the case of the conventional high-pressure air-flow type pulverizer, there is a problem that the operation of this adjustment is not easy, and is complicated and inconvenient. That is, in the conventional high-pressure air-flow type pulverizer, the lid is opened and closed each time the pulverization (pulverization) processing is performed or the maintenance of the classifying rotor is performed, and the gap is adjusted (gap adjustment). I had to. When adjusting the gap (gap adjustment), the lid is opened to expose the classifying rotor,
A gap gauge having a predetermined thickness is arranged between the lower end of the classifying rotor and the opening, and an appropriate spacer or the like is attached to or detached from a mounting portion (inside the lid) of the classifying rotor. Was very complicated and inconvenient. Further, after the gap is adjusted (gap adjustment), the high-pressure air-flow-type pulverizer must be run idle in order to prevent a decrease in the accuracy of the particle size distribution due to intrusion of dust and dirt.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and achieve the following objects. That is, the present invention is used for pulverization / classification of powder, etc., in which the gap adjustment of the classifying rotor is easy and the amount of impurities is small, and the face-to-face collision type high-pressure airflow pulverizer and the high-pressure airflow pulverizer are used. It is an object of the present invention to provide a cover gap adjusting device capable of easily adjusting a gap of a classifying rotor.

[0006]

Means for solving the above problems are as follows. That is, <1> a lid body having a plane perpendicular to the rotation axis and an exposed plane parallel to the plane, and a classifying rotor for classifying the powder pulverized by the high-pressure airflow connected so as to be able to move up and down; A device having an opening for introducing the powder classified by the classifying rotor and having a powder conveying means for conveying the powder introduced from the opening to the outside; A high-pressure air-flow type pulverizer comprising: a main body; and a displacement measuring means for measuring a distance between the exposed plane and measuring a displacement of a measured distance with respect to an initial set distance. <2> The high-pressure airflow pulverizer according to <1>, wherein the connection is screwed. <3> The high-pressure air-flow pulverizer according to <2>, wherein the screwing is performed with a fine screw having a helical pitch of 1 mm or less / 360 °. <4> The high-pressure air-flow pulverizer according to any one of <1> to <3>, wherein the classification rotors are connected to the lid at equal intervals and at least three places so as to be able to move up and down. <5> The above <1>, wherein the displacement measuring means is a high-precision displacement meter.
To the high-pressure airflow pulverizer according to any one of <1> to <4>. <6> The high voltage according to any one of <1> to <5>, wherein the displacement measuring unit measures a distance from the exposed plane at at least three places, and measures a displacement of the distance with respect to a preset set value at each place. It is a pneumatic crusher. <7> The displacement measuring means measures the distance from the exposed plane at equal intervals and at least three places, and measures the displacement of the distance with respect to a preset value at each place.
> The high-pressure air-flow-type pulverizer according to any one of <6> to <6>. <8> The place where the displacement measuring means measures the distance to the exposed plane is located at substantially the same distance from two adjacent places among the places where the classifying rotor is connected to the lid so as to be able to move up and down.
The high-pressure air-flow-type pulverizer described in 1 above. <9> The above <1>, wherein the gap between the plane of the classifying rotor and the opening of the powder conveying means is 0.2 mm or less.
To the high-pressure airflow pulverizer according to any one of <8> to <8>. <10> a lid having a plane perpendicular to the rotation axis and an exposed plane parallel to the plane, and a classifying rotor for classifying the powder pulverized by the high-pressure airflow connected to be vertically movable;
It has an opening for introducing the powder classified by the classifying rotor and is disposed parallel to the plane, and a powder conveying means for conveying the powder introduced from the opening to the outside is provided inside. Provided in a high-pressure air-flow-type pulverizing device comprising: a lid gap adjusting device for adjusting a gap between the flat surface and the opening portion, wherein a distance between the exposed flat surface is measured. And a displacement measuring means for measuring a displacement of a measured distance with respect to an initial set distance.

The high-pressure air-flow type pulverizer according to the above <1> has a plane perpendicular to the rotation axis and an exposed plane parallel to the plane, and a classifying rotor for classifying the powder pulverized by the high-pressure air flow moves up and down. A lid, which is connected so as to be capable of being parallel to the plane, and has an opening for introducing the powder classified by the classifying rotor, and transports the powder introduced from the opening to the outside. And an apparatus main body in which a powder conveying means is provided.

In this high-pressure air-flow type pulverizer, the raw material powders collide with each other with a high impact force due to the high-pressure air flow and are pulverized (pulverized) into fine powder. The raw material powders are caused to collide with each other many times by the high-pressure airflow until they become fine powder having a predetermined particle size, and are pulverized (crushed). The classifying rotor is rotating, and the raw material powder (fine powder) pulverized (crushed) to a predetermined particle size rises by the high-pressure airflow and is conveyed to the rotating classifying rotor. The fine powder conveyed to the classifying rotor enters the classifying rotor, passes through the classifying rotor, passes through the opening in the powder conveying means, is classified, and is conveyed to the outside. On the other hand, the raw material powder that has not been pulverized (pulverized) to a predetermined particle size is blown off by the rotating classifying rotor and pulverized (pulverized) until the particle diameter reaches a predetermined particle size.
As a result, a fine powder having a predetermined particle size and a uniform particle size distribution is obtained.

In this high-pressure air-flow type pulverizer, the lid is opened and closed each time a pulverization (pulverization) process is performed or each time the classification rotor is maintained. At this time, it is necessary to adjust a gap (gap) between the classifying rotor and the opening. However, since the displacement measuring unit is provided, the displacement measuring unit sets a distance between the classifying rotor and the exposed plane. Measure and measure the displacement of the measured distance with respect to the initially set distance, and adjust the position of the classifying rotor connected to the lid body based on the result so that the displacement is within the set range.

[0010] An exposed plane of the classifying rotor, which is a measurement target of the displacement measuring means, a plane perpendicular to a rotation axis of the classifying rotor, and a plane opposed to the plane.
The openings in the powder conveying means are parallel to each other. A distance between the displacement measuring means and the exposed plane when the plane and the opening have a predetermined gap is previously set as an initial set distance. The displacement measuring means measures a distance (measurement distance) with respect to the exposed surface at the time of measurement, and measures a displacement between the measured distance and the initially set distance, so that the value of the displacement falls within a set range. When the position of the classifying rotor is moved and adjusted by displacing the connection state, the plane and the opening are adjusted to a predetermined gap.

In this high-pressure air-flow type pulverizer, when adjusting the gap (gap adjustment), the lid is opened to expose the classification rotor, and the gap between the lower end of the classification rotor and the opening is adjusted. Since a gap gauge having a predetermined thickness is disposed on the mounting surface, there is no need to attach or detach an appropriate spacer or the like to or from the mounting portion (the inside of the lid) of the classifying rotor, and the work is completed only by adjusting the connection state. The operation is extremely easy and the contamination with impurities is small. Further, after the gap adjustment (gap adjustment) is performed, there is no need to perform idle operation for preventing a decrease in the accuracy of the particle size distribution due to intrusion of dust, dust, and the like.

[0012] In the high-pressure air-flow type pulverizer according to <2>, in <1>, the connection is screwed. For this reason, when adjusting the gap (gap adjustment), the screwing state is displaced, and the position of the classifying rotor is adjusted so that the value of the displacement falls within a set range. In the case of the screw engagement, the state can be continuously displaced. For this reason,
The work of finely adjusting the position of the classifying rotor so that the displacement value falls within the set range is easy, and the adjustment accuracy is high.

[0013] In the high-pressure air-flow pulverizer according to the above <3>, in the above <1> or <2>, the screw engagement may be 1 m.
It is performed with a fine thread having a helical pitch of less than m / 360 °. Therefore, adjustment of the gap (gap adjustment)
At this time, the position of the lid is adjusted by moving the fine screw so that the value of the displacement falls within a set range. The fine screw has a helical pitch of 1 mm or less / 360 times that of a normal screw.
Because of the extremely small angle of °, more vertical rotation than a normal screw is required to move up and down a certain distance. For this reason, when finely adjusting the position of the lid so that the value of the displacement falls within the set range, the operation is extremely easy as compared with the case where a normal screw is used, and the accuracy of the adjustment is even higher.

In the high-pressure air-flow pulverizer according to the above <4>, in the above <1> to <3>, the classifying rotors are connected to the lid at equal intervals and at least three places so as to be able to move up and down. . In this case, the classifying rotor is moved up and down at least at three connected positions to adjust its position. If at least three points, one plane can be specified, so that the classifying rotor is raised and lowered at least at three connected points so that the value of the displacement falls within the set range, so that the adjustment can be performed with high accuracy. It is done reliably.

[0015] In the high-pressure air-flow pulverizer according to <5>, in any one of <1> to <4>, the displacement measuring means is a high-precision displacement meter. In this case, since the high-precision displacement meter measures the value of the displacement with high accuracy in a short time, the accuracy and efficiency of the adjustment are further improved.

[0016] In the high-pressure air-flow type pulverizer according to <6>, in any one of <1> to <5>, the displacement measuring means measures a distance to an exposed plane at at least three places. The displacement of the measured distance with respect to a preset initial set distance is measured. One plane can be specified if there are at least three points. In this case, the classifying rotor is moved up and down so that the displacement values at at least three places measured by the displacement measuring means fall within a set range. The adjustment of the gap between the plane and the opening is performed with higher accuracy and more reliably.

In the high-pressure air-flow type pulverizer according to <7>, in any one of <1> to <6>, the displacement measuring means may measure a distance from an exposed plane at equal intervals and at least three places. Then, the displacement of the measurement distance with respect to the initially set distance set in advance at each location is measured. In this case, since the measurement by the displacement measuring means is performed at equal intervals on the exposed surface, the measurement error is small and the adjustment accuracy is excellent.

[0018] In the high-pressure air-flow type pulverizer according to <8>, in the above <7>, a portion at which the displacement measuring means measures a distance from an exposed plane is connected to a classifier rotor such that the classifier rotor can move up and down. Are located at substantially equal distances from two adjacent locations. In this case, since the measurement by the displacement measuring means is performed at equal intervals on the exposed surface and also at equal intervals from adjacent screwed portions, the measurement error is extremely small, and the accuracy of adjustment is further improved.

[0019] In the high-pressure air-flow pulverizer according to <9>, in any one of <1> to <8>, a gap between a flat surface of the lid and an opening of the conveying means is 0.2 mm or less. It is. In this case, fine powder having a small gap, a small amount of impurities, and a uniform particle size distribution can be efficiently obtained. However, in this case, high precision is required for the adjustment of the gap. However, since the high-pressure air-flow-type pulverizer according to any one of <1> to <8>, the adjustment can be easily performed. Will be

[0020] The lid gap adjusting device according to the above <10> has a classification rotor having a plane perpendicular to the rotation axis and an exposed plane parallel to the plane, and a classification rotor for classifying powder pulverized by a high-pressure airflow. A lid, which is connected so as to be capable of being parallel to the plane, and has an opening for introducing the powder classified by the classifying rotor, and transports the powder introduced from the opening to the outside. And a high-pressure air-flow type pulverizer comprising: Since the cover gap adjusting device includes a displacement measuring means for measuring a distance (measurement distance) from the exposed plane and measuring a displacement of the measurement distance with respect to an initial setting distance, the value of the displacement is set. By raising and lowering the classifying rotor so as to fall within the range, the gap between the plane of the classifying rotor and the opening is accurately adjusted.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION
It comprises a lid, a device body, and a displacement measuring means, and further comprises other means appropriately selected as needed. The cover gap adjusting device of the present invention is provided in a high-pressure air-flow pulverizing device including the cover and the device body, includes the displacement measuring unit, and includes other units appropriately selected as necessary. It becomes. Hereinafter, the lid, the apparatus main body, the displacement measuring means, and the other means in the high-pressure air-flow pulverizer and the lid gap adjusting device will be described.

The material, shape, structure, size, and the like of the lid are not particularly limited as long as they have a function of closing the opening for supplying the raw material powder in the apparatus main body, and may be selected according to the purpose. It can be appropriately selected from those in a known high-pressure air-flow type pulverizer. The classification rotor is rotatably supported on the lid and is connected to the lid so as to be able to move up and down. The connecting portion of the lid with the classifying rotor is sealed so that impurities cannot enter from the outside.

The classification rotor is not particularly limited as long as it has a plane perpendicular to the rotation axis and an exposed plane parallel to the plane, and has a function of classifying the raw material powder pulverized by the high-pressure airflow. Accordingly, it can be appropriately selected from those in a known high-pressure air-flow type pulverizer. It is preferable that the classifying rotor is adjusted in balance with respect to a rotation axis. The method of the balance adjustment is not particularly limited, and a known balance adjustment method can be used. The exposed plane is usually a plane exposed on a side of the lid opposite to a side facing the inside of the device main body, and the size and the like are not particularly limited.
It can be appropriately selected according to the purpose.

The material, shape, structure, size, etc. of the apparatus main body are not particularly limited as long as they have a space in which the raw material powder can be pulverized (crushed). It can be appropriately selected from those in a known high-pressure air-flow type pulverizer.

The inner surface of the apparatus main body is preferably coated with a resin material from the viewpoint of preventing abrasion, and is made of a resin material having a low content of metallic impurities in that a high-purity powder is obtained. More preferably, it is coated. Examples of the metallic impurities include B, Na, Al, K, Cr, and F.
e, Ni, Cu, Zn, W, and other metal-based impurities. The content of the metallic impurities is preferably 10 ppm or less. Examples of the resin material include polyurethane rubber, polyacetal resin, ultrahigh molecular weight polyethylene resin, polycarbonate, acrylic resin, silicone rubber, and vinyl chloride resin.
Polyurethane resin, polyacetal resin and the like are preferably used. The degree of the coating is not particularly limited,
The thickness is preferably about 1 to 15 mm, more preferably about 2 to 10 mm.

The apparatus main body is provided with a powder conveying means inside. The powder conveying means has an opening arranged in parallel with the plane and opposed to the plane and for introducing the powder classified by the classifying rotor, and conveying the powder introduced from the opening to the outside. There is no particular limitation as long as it has the function of performing the above-mentioned operations, and it can be appropriately selected from those in a known high-pressure air-flow type pulverizer according to the purpose.

The displacement measuring means is not particularly limited as long as it has a function of measuring a distance (measured distance) from the exposed plane and measuring a displacement of the measured distance from an initially set distance. For example, a high-precision displacement meter is preferably used. As the high-precision displacement meter, for example, various types such as an optical type (triangulation type), a laser transmission type, an eddy current type, an ultrasonic type, and a contact type may be used. An eddy-current-type high-precision displacement meter is preferable because it has high resolution, high accuracy, a small sensor head, does not require a wide mounting space, and is extremely excellent in environmental resistance.

The measuring point of the displacement measuring means may be on the exposed plane of the classifying rotor.
Or two or more locations. In the latter case, the displacement measuring means measures a distance (measurement distance) from the exposed plane at each measurement point, and measures a displacement of the measurement distance with respect to an initial set distance preset at each measurement point.

Among these, the measurement points include:
It is preferable that the number of measurement points is equal to or more than three (at least three) in that the adjustment can be performed with high accuracy, and the measurement points are equidistant from each other in that the measurement error is small and the adjustment accuracy is excellent. 3 or more locations (at least 3 locations)
Is more preferable. In addition, as the measurement location,
It is preferable that the classifying rotor is located at substantially the same distance from two adjacent places among the places that are connected to the lid so as to be able to move up and down in that the measurement error is extremely small and the adjustment accuracy is excellent.

In the high-pressure air-flow type pulverizer of the present invention,
The distance between the displacement measuring means and the exposed plane when the plane of the classifying rotor and the opening of the powder conveying means have a predetermined size is set as an initial setting distance in advance. deep. Then, the displacement measuring means measures a distance (measured distance) with respect to the exposed surface, and measures a displacement between the measured distance and the initially set distance. When the displacement is within the set range (preferably closer to zero), there is no need to adjust the position of the classifying rotor by moving it up and down. On the other hand, when the displacement is not within the set range (preferably closer to zero), the screw of the classification rotor is moved so that the value of the displacement is within the set range (preferably closer to zero). Adjust by raising and lowering. When the displacement is within a set range (preferably closer to zero), the plane and the opening are adjusted to have a predetermined gap.

The size of the gap is as follows.
Although it depends on the type and use of the raw material powder to be pulverized (pulverized) and classified, it cannot be specified unconditionally.
It is preferably at most 2 mm, more preferably at most 0.07 mm. If the size of the gap (gap) exceeds 0.2 mm, powder that is insufficiently classified by the classification rotor may enter from the gap and pass through the opening, resulting in a uniform particle size. In some cases, a powder having a distribution may not be obtained. It should be noted that the size of the gap is usually set to the set range of the displacement.

To connect the classifying rotor to the lid so as to be able to move up and down, for example, screwing with screws (including bolts), fitting with a pneumatic or hydraulic (hydraulic, hydraulic) cylinder, racking Meshing with a gear mechanism such as a pinion and
Etc. can be used. Among these, screwing with screws (including bolts) is preferable, and screwing with fine screws is more preferable because the gap can be easily adjusted.
Fine screws having a helical pitch of not more than m / 360 ° are more preferable, and screwing with a fine screw having a helical pitch of not more than 0.8 mm / 360 ° is particularly preferable.

The position of the connection is not particularly limited and can be appropriately selected depending on the purpose. When the connection is made at three or more places (at least three places), the connection is made at equal intervals. Is preferred.

The other means is not particularly limited and can be appropriately selected depending on the intended purpose. For example, a raw material powder supply means for supplying raw material powder into the apparatus main body, A high-pressure airflow supply means for supplying a high-pressure airflow inside and pulverizing the raw material powder inside the apparatus main body, a fine powder accommodating means for accommodating the classified fine powder conveyed to the outside by the powder conveyance means, and the like are preferably used. No.

The high-pressure air flow supply means is not particularly limited and can be appropriately selected from known ones according to the purpose. For example, two high-pressure air flow injection valves capable of injecting a high-pressure air flow in opposition are provided. And the like. The flow rate of the high-pressure airflow supplied by the high-pressure airflow supply means is not particularly limited, and can be appropriately selected according to the type, amount, purpose, and the like of the raw material powder.

The raw material powder is not particularly limited and may be appropriately selected depending on the intended purpose.
Inorganic powders such as ceramic powders such as silicon carbide powders, simple metal powders such as iron, metal powders such as alloy powders such as stainless steel, and resin powders such as thermosetting resin powders and heat-resistant resin powders. And organic powders such as powders. Of these, ceramic powders such as silicon carbide powders are preferable.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the high-pressure air-flow pulverizer of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view for explaining one embodiment of a high-pressure air-flow type pulverizer of the present invention. The high-pressure air-flow type pulverizer 1 shown in FIG. 1 includes an apparatus main body 10, a lid 20, and a displacement measuring means 30.

The apparatus main body 10 includes raw material powder supply means 2,
The apparatus includes a high-pressure air flow supply unit 3, a powder conveying unit 5, and a fine powder container 6.

The raw material powder supply means 2 includes a raw material powder input port 2
a and a raw material powder introduction path 2b. The raw material powder introduction path 2b is a cylindrical body that communicates with the inside of the high-pressure gas stream pulverizer 1, and introduces the raw material powder input from the material powder inlet 2a into the high-pressure air pulverizer 1.

The high-pressure air flow supply means 3 is located below the opening of the raw material powder introduction passage 2 b inside the apparatus main body 10.
Are provided facing each other. Two high-pressure airflow supply means 3
Simultaneously injects gas in opposite directions to generate high-pressure airflow
It is designed so that it can be generated in the direction of the upper lid 20 from the bottom inside the zero.

The powder conveying means 5 is disposed inside the apparatus main body 10 above the opening of the raw material powder introduction path 2b. The powder conveying means 5 has an opening 5a for introducing the powder classified by the classification rotor 4, and a conveying path for conveying the powder introduced from the opening 5a to the outside. The opening 5 a is provided at a position facing the lower end surface of the classification rotor 4, and the size thereof is designed to be substantially equal to the size of the opening provided at the lower end surface of the classification rotor 4. The downstream portion of the transport path is designed in a silo shape so that the powder can be dropped toward the fine powder container 6.

The fine powder container 6 is a container designed to receive the powder introduced from the opening 5a into the powder conveying means 5 and dropped from the downstream portion of the conveying path.

The lid 20 is attached to the upper opening of the apparatus main body 10 so as to be openable and closable, and includes the classification rotor 4.

The classifying rotor 4 includes a stationary plate 4a and a rotating shaft 4
b, a rotating body 4c, a rod-shaped body (wing pin) 4d, and an annular body 4e which is detachably screwed to the rod-shaped body (wing pin) 4d.

The fixing plate 4a is screwed to the lid 20 in a state of being exposed to the outside of the apparatus main body 10 (above the lid 20) and can be moved up and down by fine adjusting bolts 21 which are fine screws.

As shown in FIG. 2, the fixing plate 4a has a disk shape, and is provided at three locations at substantially equal intervals outward from the outer periphery.
A protrusion is provided. The upper surface of the protrusion is a plane parallel to the upper surface of the fixing plate 4a, and functions as the exposure plane. The fine adjustment bolt 21 is fixed to the fixing plate 4.
In the outer peripheral edge portion a, three portions are provided at positions equidistant from the adjacent protruding portions and penetrating the fixing plate 4a. The helical pitch of the fine adjustment bolt 21 is 0.1 mm.
75 mm / 360 °.

As shown in FIG. 3, nuts 22 and 23 are attached to the fine adjustment bolt 21 penetrating the fixing plate 4a.
An adjusting tool 24 that can move up and down the position of the fixing plate 4a is screwed. And the nut 22 is located above the fixing plate 4a.
The adjusting tool 24 and the nut 23 are fixed to the fixing plate 4a in this order from above.
Are arranged below the fixing plate 4 so as to sandwich the fixing plate 4a. In addition, a high-precision displacement meter as a displacement measuring means 30 is disposed on the upper surface of the projecting portion that functions as the exposure plane, and the position of the exposure plane and its setting are set by the high-precision displacement meter. The displacement with respect to the value can be measured continuously. The high-precision displacement meter is provided by being screwed to a fixture 31 fixed to the lid 20.

The rotating shaft 4b is supported by the fixed plate 4a so as to penetrate the lid 20, and can be rotated at a variable speed by a power source (not shown). The rotating body 4c is a disc-shaped member, is fixed perpendicular to the rotating shaft 4b, and can rotate at the same speed as the rotating shaft 4b rotates.

The rod (blade pin) 4d has a cylindrical shape, and one end thereof is detachably screwed on the same circumference at the outer peripheral edge of the rotating body 4c. Ring 4e
Is a disk-shaped member having substantially the same diameter as the rotating body 4c and having an opening at the center thereof, and is detachably screwed to the other end of the rod-shaped body (blade pin) 4d opposite to the one end. ing. When the rod-shaped body (wing pin) 4d is worn or the like, the rod-shaped body (wing pin) 4d is screwed to the rotating body 4c and the annular body 4e. , And can be easily removed, so that replacement when worn is easy.

The gap between the flat surface 4f, which is the lower end surface of the classifying rotor 4 (ie, the surface (opening surface) of the annular body 4e), and the opening 5a is 0.2 mm or less. In this embodiment, the set value in the displacement measuring means 30 described later is set to 0.2 mm or less.

Hereinafter, the operation of the high-pressure air-flow type pulverizer 1 will be described. In the high-pressure air-flow-type pulverizer 1, the raw material powder supplied from the raw material powder inlet 6 of the raw material powder supply means 2 is introduced into the apparatus main body 10 through the raw material powder introduction path 2b. Here, the raw material powder is a silicon carbide powder. The raw material powder introduced into the inside of the apparatus main body 10 is strongly impacted by the high-pressure air flow supplied from the high-pressure air flow supply means 3 provided opposite to each other below the raw material powder introduction path 2b. It is pulverized (crushed) by colliding with each other by force. The pulverized powder is conveyed to the classifying rotor 4 rotating at a high speed at an upper position by the upward flow by the high-pressure air flow. By the torque of the classifying rotor 4,
Of the conveyed powders, powders that have not been pulverized (crushed) to a predetermined particle size are repelled, and only the powders that have been pulverized (pulverized) to a predetermined particle size are classified by the classification rotor 4. And passes through the classification rotor 4. The powder that has passed through the classifying rotor 4 passes through the opening of the annular body 4e, passes through the opening 5a, is transported by the powder transporting means 5 into the fine powder container 6, and is stored therein.

In the high-pressure air-flow type pulverizer 1, the gap between the flat surface 4f (ie, the surface (opening surface) of the annular body 4e), which is the lower end surface of the classifying rotor 4, and the opening 5a is as follows. Adjusted. That is, the displacement measuring means 30 measures the distance (measurement distance) between the opposing projection 4g and the exposed plane, and measures the displacement of the measurement distance with respect to the initially set distance. Then, based on the measurement result of the displacement measuring means 30, the classifying rotor screwed to the lid 20 such that the displacement is within a set range (preferably closer to zero, preferably 0.2 mm or less in this embodiment). 4 with the adjusting tool 24
Adjust by rotating and raising and lowering.

The principle of the adjustment is as follows. That is, the classifying rotor 4 which is the measurement object of the displacement measuring means 30
4f, which is the lower end surface of the rotor, a plane 4f which is perpendicular to the rotation axis of the classifying rotor, and an opening 5 which is opposed to the plane 4f.
a are parallel to each other. Plane 4f and opening 5
The distance of the displacement measuring means 30 to the exposed plane when a is a gap having a predetermined size is previously set as an initial setting distance. Then, the displacement measuring means 30 measures a distance (measured distance) with respect to the exposed surface at the time of measurement, measures a displacement between the measured distance and the initially set distance, and sets a value of the displacement within a set range (zero). By raising and lowering the position of the classifying rotor 4 so as to be equal to or less than 0.2 mm, which is preferable to the above, the plane 4f and the opening 5a are adjusted to have a predetermined gap.

In the high-pressure air-flow type pulverizer 1, when adjusting the gap (gap adjustment), the lid 20 is opened to expose the classifying rotor 4, and a flat surface 4f, which is the lower end surface of the classifying rotor 4, and a flat surface 4f. A gap gauge having a predetermined thickness is arranged between the opening 5a and the opening 5a opposed to the opening 4f, so that it is not necessary to attach or detach an appropriate spacer or the like to the attachment portion of the classification rotor 4 (inside the lid 20). Since the adjusting operation is completed only by rotating the adjusting tool 24 to raise and lower the position of the classifying rotor 4, the operation is extremely easy and the contamination of impurities is small. Further, after the gap adjustment (gap adjustment) is performed, there is no need to perform idle operation for preventing a decrease in the accuracy of the particle size distribution due to intrusion of dust and dirt.

[0055]

According to the present invention, a face-to-face collision type high-pressure air-flow-type pulverizer, which is used for pulverizing and classifying powders, is easy to adjust a gap, and contains little impurities, and the high-pressure air-flow-type pulverizer. Can be provided, which can easily adjust the gap of the cover.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view for explaining one embodiment of a high-pressure air-flow type pulverizer of the present invention.

FIG. 2 is a schematic explanatory view of an exposed surface in a classifying rotor.

FIG. 3 is an enlarged schematic explanatory view of a displacement measuring means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-pressure air-flow type pulverizer 2 Raw material powder supply means 2a Raw material powder input port 2b Raw material powder introduction path 3 High-pressure air flow supply means 4 Classification rotor 4a Fixed plate 4b Rotary shaft 4c Rotating body 4d Rod-shaped body (blade pin) 4e Ring Body 4f Flat surface 4g Projecting part 5 Powder conveying means 5a Opening 6 Fine powder container 10 Device main body 20 Lid 21 Fine adjusting bolt 22 Nut 23 Nut 24 Adjusting tool 30 Displacement measuring means 31 Mounting tool

Claims (10)

[Claims] 1. A lid having a plane perpendicular to a rotation axis and an exposed plane parallel to the plane, and a classifier rotor for classifying raw material powder pulverized by a high-pressure air flow connected to the classifier so as to be able to move up and down. And an opening for introducing the powder classified by the classifying rotor, and a powder conveying means for conveying the powder introduced from the opening to the outside is provided inside. A high-pressure gas-flow-type pulverizer, comprising: an apparatus main body; and a displacement measuring unit that measures a distance between the exposed plane and a displacement of a measured distance with respect to an initially set distance. 2. The high-pressure air-flow type pulverizer according to claim 1, wherein the connection is screwed. 3. The high-pressure air-flow pulverizer according to claim 2, wherein the screwing is performed with a fine screw having a helical pitch of 1 mm or less / 360 °. 4. Classification rotors are equally spaced and at least 3
The high-pressure air-flow type pulverizer according to any one of claims 1 to 3, wherein the high-pressure air pulverizer is connected to the lid so as to be able to move up and down. 5. The high-pressure air-flow crusher according to claim 1, wherein the displacement measuring means is a high-precision displacement meter. 6. The high-pressure airflow according to claim 1, wherein the displacement measuring means measures a distance from the exposed plane at at least three places, and measures a displacement of the distance with respect to a preset value at each place. Type crusher. 7. The displacement measuring device according to claim 1, wherein the displacement measuring means measures the distance from the exposed plane at equal intervals and at least three places, and measures the displacement of the distance with respect to a preset value at each place. 2. A high-pressure air-flow type pulverizer according to 1. 8. The position where the displacement measuring means measures the distance from the exposed plane is located at substantially the same distance from two adjacent positions where the classifying rotor is connected to the lid so as to be able to move up and down. 2. A high-pressure air-flow type pulverizer according to 1. 9. The high-pressure air-flow pulverizer according to claim 1, wherein a gap between a plane of the classifying rotor and an opening of the powder conveying means is 0.2 mm or less. 10. A lid having a plane perpendicular to a rotation axis and an exposed plane parallel to the plane, and a classifier rotor for classifying raw material powder pulverized by a high-pressure air flow, the lid being connected to be able to move up and down; And an opening for introducing the powder classified by the classifying rotor, and a powder conveying means for conveying the powder introduced from the opening to the outside is provided inside. An apparatus main body, provided in a high-pressure air-flow crushing apparatus comprising: a lid gap adjusting apparatus for adjusting a gap between the plane and the opening, measuring a distance between the exposed plane, A cover gap adjusting device comprising a displacement measuring means for measuring a displacement of a measurement distance with respect to a set distance.