JP2011079617A - Fixed volume discharge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixed volume discharge device to discharge powder and grain supplied from a supply port in a fixed volume. <P>SOLUTION: Rotors 2 and 2' with a plurality of blades 2b and 2b'radially arranged on the outer periphery thereof, are mutually rotatably arranged in the inverse direction side by side laterally adjacent in the same height between left-right inside surfaces of a cylindrical casing 1. A seal boss 3 having a seal circular arc surface 3a curved so as to approach the tip of its rotating blade 2b when the rotor 2 rotates and a seal circular arc surface 3b curved so as to approach the tip of its rotating blade 2b' when the rotor 2' rotates, is arranged between the rotors 2 and 2'. The powder and grain 18 in recessed parts 2c and 2c' between the respective blades of the rotors is carried downward while being sealed by the respective seal circular arc surfaces of the seal boss in response to the rotation of the respective rotors, and is discharged from a discharge port by dropping from the recessed parts when the tip of the blades of the rotors separates from the respective seal circular arc surfaces. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is used to quantitatively control the discharge of a granular material from a container such as a hopper in which a granular material (powder, granular material, or a mixture of both) is stored. It relates to a quantitative discharge device in the form of a rotary valve.

  In a configuration in which powder particles are discharged from a container such as a hopper storing powder particles, a rotary valve is used to control the start and stop of discharge and the amount discharged per unit time in a quantitative manner. The conventional structure is described in, for example, Patent Document 1 and Patent Document 2, and is basically as shown in FIG.

  In FIG. 14A, reference numeral 101 denotes a casing formed in a cylindrical shape of a rotary valve, the upper end of which opens as a powder supply port 101a, and the lower end thereof as a powder discharge port 101b. The portion of the supply port 101a is connected to the opened lower end portion of the hopper 110. In FIG. 14, only the lower end portion of the hopper 110 is shown for convenience of illustration. The same applies to FIG. 5 of an embodiment described later.

  In the casing 101, one rotor 102 is rotatably provided. The rotating shaft 102a is supported horizontally. On the outer periphery of the rotor 102, a plurality of blades 102b are provided radially at equal angular intervals in the circumferential direction.

  As shown in FIG. 14 (b), when the granular material 111 is introduced into the hopper 110, the granular material 111 enters the casing 101 from the supply port 101 a first from the lower one by its own weight, and the upper side of the rotor 102. It stays in the recessed part 102c between the blade | wings 102b located in this position. And at the time of supply of a granular material, the rotor 102 rotates to the arrow direction by the drive of a motor not shown. Accordingly, the concave portion 102c located on the upper side of the rotor 102 moves downward together with the granular material staying there, and the granular material falls from the concave portion 102c and is discharged from the discharge port 101b. To be supplied.

JP 2001-225955 A Japanese Patent Laid-Open No. 2005-1817

  When the rotor 102 rotates in the direction of the arrow in FIG. 14A, each of the blades 102b moves in a direction approaching the right inner surface of the casing 101 above the rotation shaft 102a. For this reason, the granular material is pressed against the right inner surface, particularly the portion A, by the blade 102b. In addition, a granular material is separated with respect to B part of the left inner surface facing the code | symbol A part.

  For this reason, a problem arises particularly when the granular material is a highly adhering material such as humidified kneaded ash (hereinafter referred to as wet ash) of incinerated fly ash generated in a garbage incinerator, for example. That is, in this case, the granular material pressed against the portion A is crushed and sequentially adhered, and is largely accumulated as indicated by reference numeral C in FIG. 14B, thereby causing a so-called bridge phenomenon. Thereby, discharge | emission amount of a granular material reduces or discharge | emission stagnates and will interfere with discharge | emission of a granular material.

  In addition, if the adherence of the granular material is strong, the granular material filled in the concave portion 102c may adhere to the concave portion 102c as indicated by a symbol D in FIG. In this case, even if the concave portion 102c moves to the lower side of the rotor 102 with the rotation of the rotor 102, the granular material does not fall from this, and this also causes an obstacle to the discharge, for example, the discharge amount decreases. Resulting in.

  The present invention has been made to solve such problems, and it is an object of the present invention to provide a quantitative discharge device capable of quantitative discharge even if the supplied granular material has strong adhesion. It is said.

In order to solve the above problems, the quantitative discharge device according to the present invention is:
A casing having a rectangular cross section in which a front plate, a rear plate, and two side plates are formed, and a powder supply port is formed at the upper end and a powder discharge port is formed at the lower end,
First and second blades, which are rotatably supported in opposite directions on the front plate and the back plate of the casing, respectively, and are provided with a plurality of blades having the same shape extending radially between the front plate and the back plate at an equiangular pitch. With two rotors,
The first rotor has a seal arc surface that is arranged between the first and second rotors and curved so as to be close to the tip of the rotating blade when the first rotor rotates, and the second rotor rotates. A seal member having a seal arc surface curved on the second rotor side so as to be close to the tip of the rotating blade.
The granular materials in the recesses between the blades of the first and second rotors are transported downward while being sealed by the seal arc surfaces of the seal members as the first and second rotors rotate. When the tip of the rotor blade leaves each seal arc surface, the rotor blade falls from the recess and is discharged from the discharge port.

  According to the quantitative discharge device of the present invention, the granular material is moved to the seal arc surface of the seal member disposed between the rotors without being pressed against the inner surface of the casing by the rotary blades of the rotors. Therefore, even if the adherence of the granular material is strong, the blades of the rotor do not press the granular material against the inner surface of the casing as in the conventional case, and the granular material does not accumulate and the bridge phenomenon does not occur. Thereby, even if the supplied granular material has strong adhesion, it becomes possible to discharge the granular material quantitatively without reducing the discharge amount or delaying the discharge.

It is a perspective view which shows the whole structure of a fixed amount discharge apparatus. It is a perspective view which shows the structure in the casing which removed the back plate etc. of the fixed volume discharge apparatus. It is the perspective view which showed the structure of the drive system of a fixed amount discharge apparatus. It is explanatory drawing which shows the relationship between the seal circular arc surface of a fixed amount discharge apparatus, and the angle pitch of the blade | wing of a rotor. It is explanatory drawing explaining discharge of the granular material by a fixed discharge device. It is explanatory drawing explaining the state to which the recessed part between each blade | wing moves, when a rotor rotates in a fixed amount discharge device. It is explanatory drawing which shows the relationship between the number of teeth of the rotor gear for rotor rotation of a fixed amount discharge apparatus, and the pinion gear for rotation of a cleaning blade, a rotation scale, etc. It is explanatory drawing which showed a mode when a cleaning blade | wing and a rotor rotate from the rotary scale 0 to 18 in steps of the scale 3. FIG. 8 is an enlarged perspective view of FIG. 7 showing a rotation scale of the rotor gear. FIG. 8 is an enlarged perspective view of FIG. 7 showing a gear rotation scale of the cleaning blade. It is a block diagram which shows the structure of the other Example of a fixed amount discharge apparatus. It is a block diagram which shows the structure of the further another Example of a fixed amount discharge apparatus. It is explanatory drawing which shows a deformation | transformation of the rotor blade | wing and cleaning blade | wing of a fixed amount discharge apparatus. (A) is schematic sectional drawing which shows the basic structure of the conventional fixed quantity discharge | emission apparatus, (b) is explanatory drawing explaining problems, such as a bridge phenomenon in an identification amount discharge | emission apparatus.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the accompanying drawings. Since the quantitative discharge device of the present invention is realized as a rotary valve, the present invention will be described below based on examples of the rotary valve.

  A first embodiment of the present invention will be described with reference to FIGS. In these drawings, the same member and the left and right members provided with the same number are indicated by the same numeral, and the left and right are distinguished by a symbol without a dash and a dash.

  FIGS. 1 to 3 are diagrams for explaining the overall structure of the rotary valve according to the first embodiment. A perspective view when the rotary valve is viewed from the back, a perspective view showing the inside of the casing with the back plate removed, and a drive system. FIG. As shown in each figure, the rotary valve is provided with a rotor 2, 2 ′, a seal boss 3, and a cleaning mechanism 4, 4 ′ in the casing 1, and gears 5, 6, 7, 7 ′, 8, 8 ′, etc. are provided. A sprocket 9 is attached to the shaft to which the drive gear 5 is fixed. The sprocket 9 is coupled to a sprocket 11 rotated by a drive motor 12 via a chain 10. When the drive motor 12 rotates, the torque is transmitted to the drive gear 5 via the sprocket 11, the chain 10, and the sprocket 9. 6, 7, 7 ', 8, 8' are rotated, and the rotors 2, 2 'and the cleaning blades 4b, 4b' are rotated.

  The casing 1 accommodates or supports the members 2 to 8 'on the outside, and powder particles pass through the interior from the top to the bottom. The rotors 2 and 2 ′ move the powder particles supplied from above in the casing 1 downward.

  The seal boss 3 is a seal member that closes the space between the lower half portions of the rotation space occupied by the adjacent rotors 2 and 2 ′. As a result, when the rotors 2 and 2 ′ are stopped, the powder particles are sealed so as not to flow down from above through the gap between the rotors 2 and 2 ′, and when the rotors 2 and 2 ′ rotate, The granular material is moved along the seal boss 3 while being sealed.

  The cleaning mechanisms 4 and 4 'rotate to scrape and clean the powder particles adhering to the recesses 2c and 2c' between the adjacent blades 2b and 2b 'of the rotors 2 and 2'.

  These details are as follows.

  The casing 1 is configured by fixing a front plate 1c, a back plate 1d, upper side plates 1e and 1e ′, lower side plates 1f and 1f ′, and side seals 13 and 13 ′ to each other with bolts 14 or the like, Are rectangular and open at the top and bottom, and are formed into a cylindrical shape. The front and back inner surfaces of the casing 1 (the inner surfaces of the front plate 1c and the back plate 1d) are parallel to each other. The left and right inner surfaces of the casing 1 (the inner surfaces of the side plates 1e and 1f and the inner surfaces of the side plates 1e 'and 1f') are also parallel to each other. The upper end of the casing 1 is connected to the lower end of the hopper 17 (FIG. 5). The opening at the upper end is a supply port 1a for the granular material to which the granular material is supplied from the hopper 17, and the opening at the lower end is a discharge port 1b for discharging the granular material to the outside.

  The side seals 13 and 13 ′ are constituent members of the casing 1 and are sealing members that block the space between the rotors 2 and 2 ′ and the left and right inner surfaces of the casing 1. Thereby, it seals so that a granular material may not flow through the said space from upper direction.

  Inside the plate-like side seals 13 and 13 ′, seal portions 13b and 13b ′ that are convex portions of a predetermined width are formed in the vertical direction, and the surfaces 13a and 13a ′ have an arc shape curved in a concave shape. It has become. Hereinafter, the surfaces 13a and 13a 'are referred to as seal arcuate surfaces. The side seals 13 and 13 'are detachably fixed by bolts 14 between the side plates 1e and 1f and between the side plates 1e' and 1f ', respectively.

  The rotors 2, 2 ′ are provided with rotation shafts 2 a, 2 a ′ at the center, and a plurality of blades 2 b, 2 b ′ are provided radially on the outer periphery at equal angular pitches. In this embodiment, there are eight blades 2b, 2b 'and the angular pitch is 45 °, but it is of course not limited to this. The bottom surfaces of the recesses 2c and 2c 'between the adjacent blades 2b and 2b' of the rotors 2 and 2 'are curved in a parabolic shape. The rotors 2 and 2 ′ are pivotally supported by bearings (not shown) provided on the front plate 1c and the back plate 1d at both ends of the rotary shafts 2a and 2a ′, respectively. It is provided so that it can be rotated side by side at the same height between the side surfaces and adjacent to the left and right. The rotary shafts 2a and 2a 'are arranged so as to be horizontal, parallel to the left and right inner surfaces of the casing 1, and parallel to each other. In addition, slight gaps are provided between the rotors 2, 2 'and the front plate 1c, and between the rotors 2, 2' and the back plate 1d, so that the powder particles do not fall, thereby the rotors 2, 2 '. Can rotate smoothly.

  The axis interval of the rotary shafts 2a and 2a 'is set to a dimension slightly larger than the diameter of the rotors 2 and 2' (twice the distance from the center of the rotary shafts 2a and 2a 'to the tips of the blades 2b and 2b'). Is done. As a result, when the rotors 2 and 2 'rotate, the blades 2b and 2b' can rotate as close as possible to the extent that they do not collide with each other. Rotor gears 8 and 8 'are fixed to the back plate 1d side of the rotary shafts 2a and 2a'.

  The curvature radii of the seal arcuate surfaces 13a and 13a ′ of the side seals 13 and 13 ′ are equal to or slightly larger than the curvature radii of the circles drawn by the tips of the blades 2b and 2b ′ of the rotors 2 and 2 ′. The center of curvature of the arcuate surfaces 13a and 13a ′ is substantially coincident with the axis center of the rotation axes 2a and 2a ′. As a result, the rotors 2 and 2 'rotate so close that the tips of the blades 2b and 2b' do not contact the seal arcuate surfaces 13a and 13a '.

  The angle α formed by the arc of the seal arc surface 13a is set to be larger by a predetermined angle than the angle α ′ (= 45 °) between the blades 2b of the rotor 2, as shown in FIG. The seal arc surface 13a 'is also configured in the same manner as the seal arc surface 13a. Thus, when the rotors 2 and 2 ′ are rotated or stopped, regardless of the position of the blades 2b and 2b ′, the tips of the one or two blades 2b and 2b ′ are always sealed arcuate surfaces 13a, Close to 13a ', the gap between the seal arcuate surfaces 13a, 13a' and the rotors 2, 2 'can be closed and sealed so that the granular material does not flow down.

  As shown in FIGS. 2 and 4, the seal boss 3 is formed in a substantially triangular prism shape surrounded by the left and right side surfaces 3 a and 3 b and the lower surface 3 c. The side surfaces 3a and 3b are formed in an arcuate shape similar to the seal arcuate surfaces 13a and 13a 'of the side seals 13 and 13', and the radius of curvature of the arc is that of the rotors 2 and 2 '. The radius of curvature of the circle drawn by the tips of the blades 2b and 2b ′ is set to be approximately the same as or slightly larger than the radius of curvature, and the center of curvature substantially coincides with the axial center of the rotation axes 2a and 2a ′. As a result, the rotors 2 and 2 'rotate so close that the tips of the blades 2b and 2b' do not contact the side surfaces 3a and 3b. Hereinafter, the side surfaces 3a and 3b of the seal boss are also referred to as seal arc surfaces.

  The seal boss 3 is disposed below the center between the rotation shafts 2a and 2a 'of the rotors 2 and 2' in parallel with the rotation shafts 2a and 2a ', and is fixed to the front plate 1c and the back plate 1d with bolts or the like. .

  Further, the angle β formed by the arc of the seal arc surface 3a of the seal boss 3 is set to be larger than the angle α ′ (= 45 °) between the blades 2b of the rotor 2 by a predetermined angle, as shown in FIG. . The seal arc surface 3b is also set to the same arc angle as the seal arc surface 3a. Preferably, the angle β is set to be the same as the angle α formed by the arcs of the seal arc surfaces 13a and 13a 'of the side seals 13 and 13'. As a result, when the rotors 2 and 2 ′ are rotated or stopped, the tip of the one or two blades 2b and 2b ′ is always the seal arc of the seal boss 3 regardless of the position of the blades 2b and 2b ′. Close to the surfaces 3a and 3b, the gap between the seal arcuate surfaces 3a and 3b and the rotors 2 and 2 ′ can be closed, and sealing can be performed so that the powder particles do not flow down.

  The cleaning mechanism 4 has a structure in which two cleaning blades 4b that are 180 degrees apart from each other in the circumferential direction are provided on the rotating shaft 4a. The cleaning mechanism 4 is disposed below the rotor 2 and is disposed so that the rotation shaft 4a is parallel and horizontal at a predetermined distance directly below the rotation shaft 2a of the rotor 2. One end of the rotating shaft 4a is rotatably supported by a bearing (not shown) provided on the front plate 1c. The other end protrudes outside from a hole (not shown) of the back plate 1d and is rotatably supported by a bearing (not shown) provided on the gear plate 15 provided outside the back plate 1d.

  The cleaning mechanism 4 ′ is also configured in the same manner as the cleaning mechanism 4, and has a structure in which two cleaning blades 4b ′ separated from each other by 180 ° in the circumferential direction are provided on the rotating shaft 4a ′, and are disposed below the rotor 2 ′. . The rotating shaft 4a ′ is disposed so as to be parallel and horizontal at a predetermined distance directly below the rotating shaft 2a ′ of the rotor 2 ′, and one end thereof is attached to a bearing (not shown) provided on the front plate 1c. The other end is rotatably supported by a bearing (not shown) provided on the gear plate 15.

  The gear plate 15 is supported by fixing both left and right ends with bolts to gear brackets 16 and 16 ′ shown in FIG. 1 erected on the outer surface of the back plate 1 d. In the space between the gear plate 15 and the back plate 1d, the pinion gear 7 is provided at the end of the rotating shaft 4a of the cleaning mechanism 4 and the same number of teeth as the pinion gear 7 is provided at the end of the rotating shaft 4a ′. A pinion gear 7 'having a diameter is fixed, and the pinion gears 7 and 7' mesh with the rotor gears 8 and 8 'fixed to the rotation shafts 2a and 2a' of the rotors 2 and 2 ', respectively. Further, in the space between the gear plate 15 and the back plate 1d, a drive gear 5 and a reverse gear 6 having the same number of teeth as the drive gear 5 and the same diameter are also provided, and the respective rotary shafts 5a and 6a are gears. It is rotatably supported by bearings (not shown) provided on the plate 15 and the back plate 1d.

  The drive gear 5 is engaged with the pinion gear 7 and the reverse gear 6, and the reverse gear 6 is engaged with the drive gear 5 and the pinion gear 7 ′. The drive gear 5 is rotated about the rotation shaft 5a by the drive motor 12 via the sprocket 11, the chain 10, and the sprocket 9, and the pinion gears 7 and 7 'are rotated in reverse at the same speed by the meshing of the gears. The gears 8 and 8 'rotate in reverse at the same speed.

  Next, the operation of the rotary valve of the present embodiment configured as described above will be described.

  First, as shown in FIG. 5, a granular material (for example, wet ash) 18 is supplied from the hopper 17 onto the rotors 2 and 2 'through the supply port 1a. In a state where the rotors 2 and 2 ′ are stopped, the tips of the blades 2b and 2c ′ of the rotors 2 and 2 ′ are connected to the seal arc surfaces 3a and 3b of the seal boss 3 and the seal arc surfaces 13a of the side seals 13 and 13 ′. Since the seal boss 3 and the side seals 13, 13 ′ are close to each other, the powder 18 does not flow down through the gap between the rotors 2, 2 ′ or the casing 1. Absent. Therefore, the granular material 18 is not discharged | emitted from the discharge port 1b, and is not supplied outside.

  When the drive motor 12 is driven and the drive gear 5 rotates clockwise, the pinion gear 7 rotates counterclockwise and the rotor gear 8 rotates clockwise, as shown by the arrows in FIG. Rotates counterclockwise and the rotor 2 rotates clockwise. Further, since the reverse gear 6 rotates counterclockwise, the pinion gear 7 'rotates clockwise, the rotor gear 8' rotates counterclockwise, the cleaning blade 4b 'rotates clockwise, and the rotor 2' counterclockwise. Rotate clockwise.

  The granular material 18 supplied from the hopper 17 and accumulated in the recesses 2c and 2c ′ between the blades 2b and 2b ′ of the rotors 2 and 2 ′ through the supply port 1a is rotated in the direction of the arrows of the rotors 2 and 2 ′. In accordance with the movement of the recesses 2c and 2c ′ due to the movement, it moves downward from above, moves downward along the seal arc surfaces 3a and 3b of the seal boss 3, and deviates from the lower ends of the seal arc surfaces 3a and 3b. It falls by its own weight, is discharged from the discharge port 1b, and is supplied to the outside.

  6A to 6D show a state in which the positions of the concave portions X1 to X8 between the blades 2c of the rotor 2 move according to the rotation of the rotor 2. FIG. In the concave portion X1 of the rotor 2 shown in FIG. 6A, a predetermined amount of the granular material supplied from the hopper stays. When the rotor 2 rotates about 90 degrees from the position shown in FIG. 6A, the recess X1 shown in FIG. 6A moves to the position shown in FIG. 6B. By this movement, the granular material staying in the recess X1 does not fall downward as viewed from an angle, and moves to the position shown in FIG. 6B. At this position, the granular material in the recess X1 starts to drop downward, but the tip of the blade 2b of the rotor 2 rotates so close that it does not contact the seal arc surface 3a of the seal boss 3. Falling is prevented.

  When the rotor 2 rotates about 22.5 degrees from the state shown in FIG. 6B and moves to the position shown in FIG. 6C, the two blades 2b come close to the seal arcuate surface 3a, and the inside of the recess X1 Are in a state of being confined by the seal arc surface 3a. When the rotor 2 is further rotated by 22.5 degrees and moved to the position shown in FIG. 6 (d), one blade 2b of the rotor 2 is separated from the seal arc surface 3a, the recess X1 is opened, and the granular material When a part starts to fall and further moves to the position of the recess X2, almost all of the granular material in the recess X1 falls.

  Therefore, as the rotor 2 rotates, the powder particles accumulated in the recess X1 are quantitatively discharged. Since the rotor 2 is provided with the concave portions X1 to X8 having substantially the same volume, when the rotor 2 makes one rotation, about eight times as many powder particles in one recess are discharged from the rotor 2 in a fixed amount. Since the rotary valve is further provided with a similar rotor 2 ′ arranged symmetrically with the rotor 2, when the rotor 2 makes one revolution, the rotor 2 ′ also makes one revolution. About 16 times as much as this, the powder particles are quantitatively discharged from the rotary valve.

  In addition, when the granular material 18 is a thing with strong adhesiveness, such as a wet ash, there are some which remain attached to the bottom face of the recessed parts 2c and 2c 'of the rotors 2 and 2'. As shown in FIGS. 4 and 5, it is scraped and dropped by the cleaning blades 4b and 4b 'rotating in the direction of the arrow, and is discharged to the outside from the discharge port 1b. The cleaned recesses 2c and 2c 'move from below to above on both the left and right sides of the casing 1 by the rotation of the rotors 2 and 2'. Then, from the point where the blades 2a, 2a ′, which go ahead as viewed in the rotational direction of the recesses 2c, 2c ′, pass through the seal arcuate surfaces 13a, 13a ′, the recesses 2c, 2c ′ are again filled with the granular material from above. start. This position corresponds to the position of the recess X5 in FIG.

  By repeating such an operation continuously, the granular material 18 is continuously discharged from the discharge port 1b and supplied to the outside. If there is no excess or deficiency in the storage amount of the granular material 18 in the hopper 17, the discharge amount per hour of the granular material 18 can be quantified by making the rotation speed of the rotors 2, 2 'constant. . Moreover, the discharge amount of the granular material 18 per unit time can be variably controlled by changing the rotation speed.

  Here, details of the rotation operation of the cleaning blade 4b and the rotor 2 by the rotation of the pinion gear 7 and the rotor gear 8 in the above operation will be described with reference to FIGS. Since the rotation operations of the cleaning blade 4b 'and the rotor 2' by the rotation of the pinion gear 7 'and the rotor gear 8' are common except that the respective rotation directions are reversed, the description thereof is omitted.

  As shown in FIG. 7, the ratio of the number of teeth of the pinion gear 7 and the rotor gear 8 is 24: 96 = 1: 4. Moreover, in FIG. 7, the code | symbol 7a is a rotation scale to 0-36 which divided 360 degree of one rotation of the pinion gear 7 into 10 degrees, and is also a rotation scale of the cleaning blade | wing 4b. Details of this rotary scale are shown in FIG. Reference numeral 8 a is a rotation scale of the rotor gear 8 that rotates in conjunction with the rotation of the pinion gear 7, and is also a rotation scale of the rotor 2. Details of this rotary scale are shown in FIG.

  When the pinion gear 7 rotates by one graduation in the arrow direction shown in FIG. 7, the rotor gear 8 rotates by one graduation in the arrow direction, but the rotation angle is opposite to the ratio of the number of teeth with respect to the pinion gear 7. It becomes 1/4 according to the ratio. Therefore, when the pinion gear 7 rotates 360 ° from the scale 0 to 36 in the arrow direction, that is, one rotation, the rotor gear 8 rotates from the scale 0 to 36 in the arrow direction, but the rotation angle is 90 ° corresponding to 1/4 rotation. Thus, the blade rotates by an angle twice the angular pitch (45 °) of the blade 2b. As a result, when the cleaning blade 4b rotates 180 ° from the scale 0 to 18 with the rotation of the pinion gear 7, that is, ½ rotation, the rotor 2 rotates 45 ° from the scale 0 to 18 with the rotation of the rotor gear 8. That is, the rotation is performed by the angle pitch of the blade 2b by 1/8 rotation.

  FIG. 8 shows the state in which the cleaning blade 4b rotates from 0 to 18 on the rotary scale, that is, when the cleaning blade 4b rotates 180 ° in half rotation, in increments of 3 (corresponding to 30 ° rotation of the cleaning blade 4b). ing. When the scale is 0 in FIG. 8A, the cleaning blade 4b is horizontal. And the one blade | wing 2b of the rotor 2 is located right above the rotating shaft 4a, and is vertical.

  From this state, when the cleaning blade 4b and the rotor 2 rotate in the directions of the arrows, respectively, and the scale 3 in FIG. 8B is reached, the tip of the cleaning blade 4b is positioned immediately before the next blade 2b (2). When the cleaning blade 4b rotates beyond the scale 3, it enters the recess 2c between the blades 2b (1) and 2b (2) of the rotor 2, and further, the scales 6 and 9 in FIGS. 8 (c) to 8 (e). , 14, the cleaning blade 4b rotates along the bottom surface of the recess 2c from the blade 2b (2) side of the rotor 2 toward the 2b (1) side. At this time, if a granular material adheres in the recess 2c, it is scraped off by the cleaning blade 4b. Then, the cleaning blade 4b comes out of the recess 2c between the blades 2b (1) and 2b (2) after rotating past the scale 14 in FIG. 8 (e), and rotates to the scale 18 in FIG. 8 (f). In other words, when it is rotated 180 ° from the state of FIG. At this time, the blade 2b (2) is positioned directly above the rotating shaft 4a and becomes vertical. That is, the scale 18 shown in FIG. 8 (f) is in the same state as the scale 0 in FIG. 8 (a).

  In this way, while the rotor 2 rotates by the angular pitch (45 °) between the blades 2, the cleaning blade 4b rotates 180 °, enters one recess 2c of the rotor 2, and rotates along its bottom surface. Then exit and return. By repeating this operation, the plurality of recesses 2c of the rotor 2 are sequentially cleaned one by one by the cleaning blade 4b. In order to enhance this cleaning effect, the curvature of the recess 2c is set to a value that is almost the same as or slightly larger than the radius of curvature of the circle drawn by the tip of the cleaning blade 4b, and the center of curvature is rotated. It is made to correspond with the axis center of the axis | shaft 4a. Thereby, the front-end | tip of the cleaning blade | wing 4b rotates adjacently along the curved surface of the recessed part 2c of the rotor 2, and the granular material adhering to the recessed part 2c can be scraped off effectively.

  According to the rotary valve of the present embodiment as described above, the rotors 2 and 2 ′ are rotated in the direction indicated by the arrows shown in FIGS. . That is, the rotation direction of the rotor 2 adjacent to the left inner surface of the casing 1 is clockwise, and the blade 2b moves in the right direction away from the left inner surface above the rotation shaft 2a. It is. The rotation direction of the rotor 2 ′ adjacent to the right inner surface of the casing 1 is counterclockwise, and the blade 2b ′ moves in the left direction away from the right side surface above the rotation shaft 2a ′. Direction of rotation.

  Therefore, the blades 2b and 2b 'of the adjacent rotors 2 and 2' do not press the granular material 18 against the left and right inner surfaces of the casing 1, and conversely move so that the granular material 18 is separated from the inner surface. To do. For this reason, even if the adherence of the granular material is strong, as in the conventional example of FIG. 14, the rotor 102 has an A portion above the rotating shaft 102 a of the rotor 102 on one of the left and right inner surfaces of the casing 101. The blade 102b presses the powder body 111 and the powder body 111 does not accumulate as indicated by the symbol C, and the bridge phenomenon does not occur.

  Even if the granular material 18 remains in the recesses 2c and 2c ′ that have moved to the lower side of the rotors 2 and 2 ′ as the rotors 2 and 2 ′ rotate, they remain in the cleaning blades 4b and 4b. It is scraped off by 'and discharged from the discharge port 1b and supplied to the outside.

  Therefore, even if the supplied granular material is strongly adherent such as wet ash, for example, the discharge amount is not reduced or the discharge is not delayed, and the discharge can be performed without any trouble.

  Further, in this embodiment, since the seal boss 3 is provided, when the rotors 2 and 2 ′ are stopped (when the supply of powders is stopped), the powder particles are spaced from above the rotors 2 and 2 ′. Can be prevented from flowing down through. Further, since the side seals 13 and 13 ′ are provided, when the rotors 2 and 2 ′ are stopped, the gap between the rotor 2 and 2 ′ and the left and right inner surfaces of the casing 1 from the top when the rotor is stopped. Can be prevented from flowing down through.

  In the first embodiment, the two rotors 2 and 2 ′ are provided so as to be arranged adjacent to each other at the same height between the left and right inner surfaces of the casing 1. In contrast, as shown in FIG. 11A, three rotors 21 to 23 having the same configuration as the rotor 2 (2 ′) are adjacent to each other at the same height between the left and right inner surfaces of the casing 1. It may be provided in a line. Also in this case, the rotating shafts 21a to 23a of the rotors 21 to 23 are arranged horizontally, parallel to the left and right inner surfaces of the casing 1, and parallel to each other.

  Moreover, let the rotation direction of the rotors 21-23 at the time of supply of a granular material be a direction shown by the arrow in a figure. That is, the rotation directions of the rotors 21 and 22 are opposite to each other, similarly to the rotors 2 and 2 ′ of the first embodiment, the rotation direction of the rotor 23 is opposite to the rotor 21, and the rotation direction of the rotor 22 is Identical. Further, the same seal bosses 31 and 32 as the seal boss 3 of the first embodiment are provided so as to block the space between the lower half portions of the rotation spaces occupied by the adjacent rotors in the rotors 21 to 23. Further, the same cleaning mechanisms 41 to 43 as the cleaning mechanisms 4 and 4 ′ of the first embodiment are provided below the rotors 21 to 23, respectively.

  Further, in the configuration shown in FIG. 11B, four rotors 21 to 24 having the same configuration as the rotor 2 (2 ′) are provided in the casing 1, and the rotor shown in FIG. 24 is added. The rotation directions of the rotors 21 and 22 are the same as the rotors 2 and 2 ′ of the first embodiment, in which the respective blades 21b and 22b are separated from the adjacent casing inner surfaces above the rotation shafts 21a and 22a. Rotation direction to move. The rotation direction of the rotor 22 is opposite to that of the rotor 21, and the rotation direction of the rotor 23 is opposite to that of the rotors 22 and 24. That is, in the rotors 21 to 24, it is assumed that the rotation directions of the adjacent rotors are opposite to each other.

  Further, the same seal bosses 31 to 33 as the seal boss 3 of the first embodiment are provided so as to block the space between the lower half portions of the rotation spaces occupied by the adjacent rotors in the rotors 21 to 24. Further, the same cleaning mechanisms 41 to 44 as the cleaning mechanisms 4 and 4 ′ of the first embodiment are provided below the rotors 21 to 24.

  In any of the configurations shown in FIGS. 11A and 11B, even if the supplied granular material has strong adhesion, the discharge can be performed without any trouble by the same action as in the first embodiment.

  In addition, the number of rotors is not limited to 2 to 4, and a plurality of other rotors may be used. Regardless of the number of rotors, in order to prevent the occurrence of the bridge phenomenon described above, the rotational directions of the two rotors adjacent to the left and right inner surfaces of the casing among the plurality of rotors are The rotation direction is the same as that of the rotors 2 and 2 ′ in Example 1. That is, it is set as the rotation direction which the blade | wing of each rotor moves to the direction spaced apart from an adjacent casing inner surface above the rotating shaft of a rotor.

  When the number of rotors is an even number, it is assumed that the rotation directions of the adjacent rotors are opposite to each other.

  In the configuration of the first embodiment, the rotors 2 and 2 ′ and the cleaning mechanisms 4 and 4 ′ are driven by one drive motor, but the rotor 2 and the cleaning mechanism 4 are driven by the drive motor 12 as shown in FIG. The rotor 2 ′ and the cleaning mechanism 4 ′ may be driven by a drive motor 12 ′ provided separately. In this example, the pinion gear 7 is rotated by the drive motor 12 via the chain 10 and the sprockets 9 and 11, and the rotor gear 8 and the rotor 2 are rotated by the rotation of the pinion gear 7, and the cleaning mechanism 4 is driven. Further, the pinion gear 7 ′ is rotated by the drive motor 12 ′ via the chain 10 ′ and the sprockets 9 ′ and 11 ′, and the rotor gear 8 ′ and the rotor 2 ′ are rotated by the rotation of the pinion gear 7 ′, and the cleaning mechanism 4 ′. Is driven. If the drive motors 12 and 12 'are rotated synchronously at the same speed and reverse rotation, the same effect as in the first embodiment can be obtained.

  FIG. 13 shows an embodiment in which the number of rotor blades and cleaning blades is changed. In the embodiment shown in FIG. 13A, the rotors 2 and 2 'have eight blades as in the first embodiment. However, one cleaning blade 50 and 50' rotates around the shafts 50a and 50a '. This constitutes a cleaning mechanism. In this case, in order to obtain a cleaning effect similar to that of the first embodiment, when the rotors 2 and 2 'rotate once, the cleaning blades 50 and 50' rotate eight times.

  In the embodiment of FIG. 13B, nine blades are provided on the rotors 2 and 2 ′ at an angle of this interval, and the three cleaning blades 51b and 51b ′ are rotated about the shafts 51a and 51a ′, respectively. A cleaning mechanism is provided. In this case, in order to obtain the same cleaning effect as in the first embodiment, when the rotors 2 and 2 'rotate once, the cleaning blades 51b and 51b' rotate three times.

  In any of the embodiments, the rotary valve is suitable for discharging wet particles such as sludge from domestic wastewater, and also used for quantitative discharge of viscous substances such as water tanks. Can do. Further, for example, it can also be used for quantitative discharge of dry powder having weak adhesion, such as bread milling, but in that case, if not necessary, the cleaning blade may be omitted.

DESCRIPTION OF SYMBOLS 1 Casing 1a Supply port of a granular material 1b Discharge port of a granular material 1c Front plate 1d Rear plate 1e, 1e ', 1f, 1f' Side plate 2, 2 ', 21-24 Rotor 2a, 2a', 21a-24a Rotation Shaft 2b, 2b ', 21b-24b Blade 3, 31-33 Seal boss 3a, 3b Seal arc surface 4, 4', 41-44 Cleaning mechanism 4a, 4a 'Rotating shaft 5 Drive gear 6 Reverse gear 7, 7' Pinion gear 8 8 ′ rotor gear 9 sprocket 10 chain 11 sprocket 12 drive motor 13, 13 ′ side seal 13 a, 13 a ′ seal arc surface 14 bolt 15 gear plate 16 gear bracket 17 hopper 18 granular material

Claims (6)

A quantitative discharge device for quantitatively discharging powder particles,
A casing having a rectangular cross section in which a front plate, a rear plate, and two side plates are formed, and a powder supply port is formed at the upper end and a powder discharge port is formed at the lower end,
First and second blades, which are rotatably supported in opposite directions on the front plate and the back plate of the casing, respectively, and are provided with a plurality of blades having the same shape extending radially between the front plate and the back plate at an equiangular pitch. With two rotors,
The first rotor has a seal arc surface that is arranged between the first and second rotors and curved so as to be close to the tip of the rotating blade when the first rotor rotates, and the second rotor rotates. A seal member having a seal arc surface curved on the second rotor side so as to be close to the tip of the rotating blade.
The granular materials in the recesses between the blades of the first and second rotors are transported downward while being sealed by the seal arc surfaces of the seal members as the first and second rotors rotate. A quantitative discharge device, wherein when a tip of a rotor blade leaves each seal arc surface, the blade drops from the recess and is discharged from a discharge port.   The arc angle of the seal arc surface on the first rotor side of the seal member is larger than the angle formed by each blade of the first rotor, and the arc angle of the seal arc surface on the second rotor side of the seal member is second The quantitative discharge device according to claim 1, wherein the quantitative discharge device is set to a value larger than an angle formed by each blade of the rotor.   The side plate facing the first rotor of the casing has a side seal portion having a seal arc surface curved so as to be close to the tip of the rotating blade when the first rotor rotates, and the second rotor of the casing. The side plate that faces the first rotor is provided with a side seal portion having a seal arc surface that is curved so as to be close to the tip of the rotating blade when the second rotor rotates. 3. The quantitative discharge device according to claim 1, wherein the quantitative discharge device prevents the liquid from falling downward from the side plate and prevents the liquid from falling downward from the side plate facing the second rotor. 4.   The arc angle of the seal arc surface of the side seal portion facing the first rotor is larger than the angle formed by each blade of the first rotor, and the arc angle of the seal arc surface of the side seal portion facing the second rotor. Is set to a value larger than the angle formed by each blade of the second rotor.   A cleaning blade whose tip rotates along a recess between the blades of the first and second rotors is provided below each rotor, and powder particles adhered in the recess are scraped off by the cleaning blade. The fixed amount discharge device according to any one of claims 1 to 4, wherein the fixed amount discharge device is characterized.   One or a plurality of third rotors having the same configuration as the first or second rotor is provided between the second rotor and the side plate facing the second rotor, and between the second and third rotors or between the third rotors. The seal member having the same configuration as that of the seal member disposed between the first and second rotors is disposed, and the granular material that has fallen into the recesses between the blades of the third rotor is provided in each seal of the seal member having the same configuration. 6. The sheet according to claim 1, wherein the sheet is conveyed downward while being sealed by an arc surface, and is dropped from the recess when the tip of the blade of the third rotor leaves the seal arc surface and discharged from the discharge port. The quantitative discharge apparatus of any one of Claims.

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