JPH0716655Y2 - Vertical rotary valve - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a vertical rotary valve used for supplying / discharging powders and grain raw materials.

[0002]

2. Description of the Related Art A vertical rotary valve used for transferring and supplying raw materials in a path having a pressure difference for transferring powder or grain raw materials is known. In this type of rotary valve, a raw material is introduced from a raw material inlet into a raw material storage chamber formed in a horizontally rotating rotor, and the raw material storage chamber is exposed to the raw material discharge port by rotating the rotor to insulate the raw material storage chamber from the raw material inlet. No, it is designed to discharge the raw material in the raw material storage chamber, and this kind of valve is used when there is a pressure difference between the raw material inlet and the raw material outlet. Therefore, air tightness is required between the rotor and the raw material inlet / outlet.

In order to maintain such airtightness, the present applicant previously proposed Japanese Patent Application No. 59-160075. This is such that plate-shaped sealing members are provided above and below a horizontally rotating rotor equipped with a raw material storage chamber, and each raw material inlet and raw material discharge port are individually connected to each seal member for rotation. A pressing mechanism for pressing the upper seal member downward is provided with a forcing opening. According to this, it is possible to improve the airtightness of the rotary valve and the life and durability of the seal member. .

[0004]

The above-mentioned prior art is intended to improve the sealing device in order to improve the airtightness between the rotor and the raw material inlet and the raw material outlet. The raw material was transferred to the raw material discharge port by gravity due to the gravity of the raw material. Therefore, it may be difficult to smoothly transfer a viscous raw material or the like, and it has been desired to smoothly discharge any raw material.

Therefore, the object of the present invention is to inherit the technology of the sealing device of Japanese Patent Application No. 59-160075, while the raw material introduced from the raw material inlet enters the raw material storage chamber and is supplied from the air flow inlet. (EN) Provided is a vertical rotary valve that is smoothly and quickly discharged to a raw material discharge port by a gas flow.

[0006]

In order to solve the above problems, the present invention provides a housing having a raw material inlet and an air flow inlet in the upper portion and a raw material outlet in the lower portion, and a vertical shaft provided inside the housing. A rotor having a raw material storage chamber that horizontally rotates, and upper and lower sealing members having communication holes that individually communicate the raw material supply port and the discharge port that are interposed above and below the rotor and that rotate and move. The raw material charging port and the air flow inlet are configured by a pressing mechanism that is installed in the peripheral portion of the upper cover of the housing and that is sealed by an adjusting screw to insert the upper cover and directly press the seal member in the axial direction of the rotor. Tubular part
The material seals the opening formed in the upper cover and allows it to communicate with the opening of the upper sealing member, and the raw material introduced into the raw material storage chamber through the raw material inlet is rotated by the rotor to discharge the raw material and the airflow inlet. To the outside by the airflow supplied from the airflow inlet.

[0007]

According to the above means, by providing the airflow inlet for blowing the airflow into the raw material storage chamber, the raw material can be transferred much more smoothly and quickly than the conventional case where the raw material is transferred by gravity. Can be done. In addition, a pressing mechanism that presses the seal material in the axial direction of the rotor is provided to seal the periphery of the raw material inlet and raw material outlet, so the sealing mechanism inside the housing is miniaturized, and a strong airtightness is achieved. Is obtained.

[0008]

Embodiments of the present invention will now be described with reference to the accompanying drawings. 1 is a vertical sectional view of a vertical rotary valve of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a bottom view thereof, FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, and FIG. FIG. 6 is a sectional view taken along line -5 and FIG. 6 is a view of a modified embodiment of the seal member. Reference numeral 1 denotes a rotary valve, a valve housing 2 has a cylindrical container shape, and a cylindrical main body 201 and a disk-shaped upper cover 2 that closes the upper and lower sides of the main body 201.
02 and a lower cover 203. The flanges 204 and 205, which are provided on the outer periphery of the upper and lower ends of the main body 201 in the radial direction, and the peripheral portions of the covers 202 and 203 are packed into the packings 206 and 20.
6 are interposed, and they are bound by bolts and nuts 207 .... As a result, a closed chamber 208 is formed in the housing 2.

An opening 214 which forms a part of the raw material charging port is formed in a portion near the peripheral portion of the upper cover 202, and the peripheral portion of this portion is formed as an annular projection 215 which projects upward in an annular shape. In the embodiment, the tubular member 301 constituting the raw material inlet 3 is vertically inserted and fitted, and the gland packing 302 is interposed between the tubular member 301 and the opening 214 to maintain the airtightness of both.

Further, an opening 29 forming a part of the air flow inlet 30 is formed in a peripheral portion 180 degrees apart from the opening 214 forming a part of the raw material charging port 3 of the cover 202, and the peripheral portion of this portion is formed. Is an annular protrusion 215 that projects upward in an annular shape. In the embodiment, the tubular member 31 constituting the air flow inlet 30 is vertically inserted and fitted, and the gland packing 302 is interposed between the tubular member 31 and the opening 29 to maintain the airtightness of both.

In this embodiment, the air flow of the heating medium (for example, heated steam) is also used as the air flow to perform the sterilization treatment of the raw material, but the present invention is not limited to this and other gas may be used. It may be a fresh air flow.

A rotor 4 forming a valve body is provided in a chamber 208 inside the housing 2. The rotor 4 is composed of upper and lower disc-shaped substrates 401 and 402, and a plurality of vertically disposed intermediate parts around the space between them. , And the upper and lower substrates 4
01 and 402 are provided with the same number of openings 404 and 405 communicating with the inside of each cylinder 403, and the cylinder 4 including the openings.
A raw material storage chamber 406 is formed inside by 03.

The rotor 4 is connected via a cylindrical holder 407 and a key 408 to a vertical drive shaft 5 which is provided so as to pass vertically through the central portions of the upper and lower substrates.
A ring-shaped cylindrical through hole 20 provided at the center of 02, 203.
It is extended to the outside of the upper and lower covers through 9, 210. In the figure, 501 and 502 are gland packings that seal between the through holes 209 and 210 and the shaft 5. The shaft 5 is rotatably driven, for example, by connecting an upward extending portion to a motor or the like (not shown), and the lower end portion 503 is rotatable by a support stay 504 attached to the lower cover 203 via a bearing 505 (for example, a needle bearing). Also, it is supported so that it can move up and down.
The support stay 506 attached to the upper cover 202 supports the intermediate portion 507 of the upward extending portion through the bearing 508.

The rotor 4 is rotationally driven in the housing 2 by the above drive shaft 5, and the raw material storage chamber 4
Six cylindrical bodies 4 that compose 06 are arranged at equal intervals in the radial direction at equal intervals as is apparent from FIG.

A material discharge port 6 is provided in a part of the lower cover 203 near the periphery. The raw material discharge port 6 is formed by a cylindrical extending portion 212 surrounding the opening portion 211 provided in the cover 203. The raw material discharge port 6 is provided at a position 180 ° apart from the above-described raw material input port 3 in the embodiment, and the point is that the same raw material storage chamber is located at a position facing the raw material storage chamber 406 of the rotor 4 on one side. The positions of both 3 and 6 are set so that 406 does not communicate with the other. In this state, the raw material storage chambers 406 and 1
The raw material storage chamber 406 provided at a position separated by 80 ° is
It is in direct communication with the air flow inlet 30 and the raw material discharge port 6.

The upper and lower substrates 401, 40 of the rotor 4 described above
Sealing plates 7 and 8 forming a disk-shaped sealing member are provided above and below each of the two. The lower seal plate 8 is the lower cover 203.
The lower substrate 402 of the rotor 4 arranged above is in sliding contact with the predetermined pressure, and a communication port 801 that communicates with the raw material discharge port 6 described above is provided in part, and the insertion port 702 of the shaft 5 is provided in the central portion. Prepare Further, if the downstream side of the communication port 801 that communicates with the discharge port 6 of the lower seal plate 8 in the rotor rotation direction, for example, the rotor 4 rotates to the right in FIG. 1, the deaeration port 803 is provided in the portion on the back side of the paper surface. The deaeration port 803 is provided at a position insulated from the raw material storage chamber 406 and the communication port 801, and is communicated with the deaeration port 213 provided on the lower cover 203. Therefore, the rotor 4 rotates, the raw material received from the raw material input port 3 is stored in the raw material storage chamber 406, discharged through the raw material discharge port 6, and after discharging, the interior of the raw material storage chamber 406 is removed by facing the degassing ports 803 and 213. I care.

The upper sealing plates 7 and 8 face the upper substrate 401 of the rotor 4, and a part of this is provided with a communication hole 701 which communicates with the raw material inlet 3, and at this part, the lower flange 303 of the tubular member 301. Is connected with. The tubular member 301 is
Since it is fitted in the opening 214 of the upper cover 202 via the gland packing 302, it can slide in the axial direction. An insertion port 702 for the shaft 5 is provided at the center of the seal plate 7.

A part of the above upper seal plate 7 is pressed downward from above the rotor 5 in the direction of the axis 5 by the pressing mechanism 9 provided in the valve housing 2. The pressing mechanism 9 includes a holder 901 vertically provided on a part of the upper cover 202 and a holder 90.
Packing 902 stored in the lower part of 1 and packing 9
A gland packing 904 including a nut 903 that pressurizes 02, and an adjusting screw 905 that vertically penetrates the nut 903 and abuts the lower end portion 906 against a part of the upper surface of the upper seal plate 7. The lower end 9 is on the upper seal plate 7.
The seal plate 7 is provided with a concave portion 703 that engages with 06, and the sealing plate 7 is pressurized by the screw rotation of the adjusting screw 905, and the sealing pressure between the substrates 401 and 402 above and below the rotor and the sealing plates 7 and 8 is adjusted. In order to equalize the pressure, the pressing mechanism 9 is preferably plural, and in the embodiment, 180 as shown in FIG.
° Separated. The engagement between the concave portion 703 and the adjusting screw 905 not only applies the pressure but also fixes the seal plate to prevent rotation.

As the seal plates 7 and 8 described above, a hard material such as metal or ceramic may be used, or a soft synthetic resin material such as Teflon may be used. When the upper seal plate 7 is a soft seal plate 7A as shown in FIG. 6, it is preferable to provide a backup material 7B made of a metal plate material or the like on the seal material 7A. In addition, 7 in the figure
C is a stopper for preventing rotation of both 7A and 7B.

In the above, the raw material is introduced from the raw material introduction port 3, and the raw material storage chamber of, for example, a faces the position directly below the raw material introduction port 3 by the rotation of the rotor 4, and the raw material is stored therein. By rotating the rotor 4, the raw material storage chamber a is sealed by the seal plates 7 and 8 at a position apart from the communication hole 701 of the raw material inlet 3 and the seal plate 7, and the seal pressure is the same as the pressing mechanism 9 described above.
Adjust with and seal. In this case, the sealing member is plate-shaped and a surface pressure can be obtained by sandwiching the sealing member from above and below, and high airtightness is maintained due to surface contact. When the rotor rotates and the storage chamber reaches the position of b, the raw material in the storage chamber is discharged by communicating with the raw material discharge port 6. Rotation of the rotor after discharge causes degassing holes 8
03, 213 is reached, deaeration is performed, and the next raw material is smoothly received. Repeat the above.

By the way, in this embodiment, the following constitution is adopted. That is, 10 is an inlet provided in a part of the peripheral wall of the housing main body 201, 11 is an inlet provided in a part of the lower cover 203, and these are connected to the outside by pipes 101 and 111 equipped with switching valves 102 and 112. And the medium is introduced into the chamber 208. The medium may be selected according to the raw material or the treatment method in the next step. For example, in the case of a raw material that easily adheres to the wall surface of the storage chamber 406, cold water is supplied into the chamber 208 by the above system to cool it.

When the raw material is heat-treated in the next step, steam or hot water or the like is supplied as preheat to heat it. When pressure treatment is performed in the next step, a medium having a higher pressure than that pressure is introduced. According to this, it is possible to prevent leakage of fine raw material from the sealing surface.

Next, an example in which the vertical rotary valve 100 is applied to an air flow type heating device will be described with reference to FIG. The airflow superheater 600 is a heating pipe 6 through which superheated steam is aerated and heat-treats while transporting the raw material by airflow.
09, a cyclone 603 for separating the heat-treated raw material and superheated steam, a discharge valve 608 provided at a raw material discharge port of the cyclone 603 for hermetically discharging the raw material to the outside of the system, a circulation blower 605 for circulating the superheated steam, a raw material It is composed of a super heater 607 for heating superheated steam whose temperature has been lowered by contact with and a vertical rotary valve 100 used as a raw material charging device.

The upstream side of the heating pipe 609 is connected to the raw material discharge port 6 of the vertical rotary valve 100, and the downstream side is connected to the inlet 602 of the cyclone 603. Further, the outlet 604 of the cyclone 603 and the circulation blower 6
05, the discharge port of the blower 605 and the heating medium inlet of the vertical rotary valve 100 are connected to the super heater 60.
7 are connected by pipes 610, 611, and 612, respectively, to form a circulation system 601. A saturated steam supply pipe 613 is connected to the pipe 611 and supplies saturated steam to the circulation systems 601 and 601.

The airflow heating device 600 is constructed as described above, and the raw material supplied from the raw material feeder 614 to the vertical rotary valve 100 through the raw material charging port 3 is
After the rotor 4 in FIG. 1 makes a half turn, it is discharged from the raw material discharge port 6 by its own weight or by the action of a stream of superheated steam. Next, the raw material is heated in the superheated pipe 609 by passing through an air flow, separated from the superheated steam by the cyclone 603, and recovered as a product from the discharge valve 608. On the other hand, the superheated steam is circulated in the circulation system 60 by the action of the circulation blower 605.
1,601 is distributed.

Next, an embodiment of the pressing mechanism for the seal plate 7 will be described. FIG. 9 shows an example in which a hydraulic cylinder is used as the pressing mechanism. A cylinder 9 supported by a pedestal 911 by replacing the adjusting screw passing through the packing 902 and the nut 903 with a rod 910 abutting on the upper seal plate 7.
By supplying pressure oil to 12, the rod 910 is moved downward, and the seal plate 7 is pressurized. In this embodiment, in order to keep the pressure of the seal surface 7a constant, the load current of the motor which changes with the pressure is detected to control the operation of the hydraulic cylinder.

That is, the load current of the motor 913 is measured by the ammeter 91.
4 and input this signal to the controller 915,
The servo valve 916 is controlled by the controller 915 according to the signal.
To control the pressure in the cylinder 912 and adjust the pressure on the sealing surface. A pressure sensor 917 is installed at the contact portion between the rod 910 and the upper seal plate 7 to detect the pressure,
The cylinder pressure may be controlled. It is also possible to detect the amount of leakage of a medium such as water vapor from the sealing surface and control the hydraulic cylinder 912 accordingly.

10 and 11 show another embodiment of the pressing mechanism. In FIG. 10, a disc spring 920 is interposed between the lower seal plate 8 and the lower cover 203. A downward recess 820 is formed in a part of the seal plate 8 and a free space is formed in a part of the lower cover 203. Providing a projection 220 that fits together, the movement in the plane between the seal plate 8 and the lower cover 203 is restricted, and the projection 2
A spring 920 was arranged around the circumference of 20 to perform a spring guide.

FIG. 11 shows the adjusting screw 90 described above.
5, a coil spring 930 is interposed between the end face 906 of the upper end 5 and the bottom surface of the recess 703 of the upper seal plate 7.
Increase the depth of 03 to prevent the screw tip from coming off. According to the embodiments of FIGS. 10 and 11 described above, the adhesion of the seal surface is improved as compared with the above-described embodiment, and the impact caused by the rotation of the rotor can be absorbed.

FIG. 12 shows a modified embodiment of the present invention in which two openings 209 and 29 are provided in the peripheral portion of the upper cover 202 and are spaced 180 ° apart from each other. It's a part. A peripheral portion of the opening 29 is an annular protrusion 215 that projects upward in an annular shape. In the embodiment, a tubular member 31 that constitutes the airflow inlet 30 is vertically inserted and fitted,
A gland packing 302 is interposed between the tubular member 31 and the opening 29 to maintain the airtightness of both. Inside the tubular member 31, a swirl flow generating mechanism 32 having an upper end and a lower end having a cone shape and an intermediate portion having a cylindrical shape is supported on the inner peripheral surface of the tubular member 31 via a twisting blade 33. .

According to the embodiment of FIG. 12, the air flow of the superheated medium (superheated steam) blown from the air flow inlet 30 is diverted to the inner peripheral surface side of the air flow inlet by the upper end cone of the swirl flow generating mechanism 32, and the twisted blades are provided. After passing through 33, a swirl flow is formed, and the raw material is discharged more smoothly and quickly.

FIG. 13 shows still another modified embodiment, in which an air flow speed increasing mechanism 34 having a cone shape at the upper end and a cylindrical shape at the lower portion is provided inside the tubular member 31 via a fixing plate 35. Is supported on the inner peripheral surface of. According to the embodiment shown in FIG. 13, the air flow of the heating medium (superheated steam) blown from the air flow inlet 30 is narrowed by the air flow accelerating mechanism 34 to narrow the air passage of the air flow inlet 30, thereby increasing the flow velocity and discharging the raw material. Do smoothly and quickly.

[0034]

As described above in detail, according to the present invention, the air flow inlet is provided 180 ° apart from the raw material inlet to the upper part of the housing, and the air flow is supplied to the raw material storage chamber to supply the raw material to the raw material outlet. Since it discharges, compared with the conventional device that discharges the raw material by the action of gravity, the raw material can be discharged more smoothly and quickly, especially because the raw material is transferred and discharged by the air flow, the transfer of the viscous raw material to some extent, It can be discharged smoothly, quickly and efficiently. Further, by using an air flow and a heating medium in combination, it can be used as a rotary valve in a line for heat transformation of raw materials, heat treatment, sterilization, steaming, etc., and these treatments can be carried out efficiently. Further, a cylinder that is provided around the upper cover of the housing and is equipped with a pressing mechanism that inserts the upper cover and is directly pressed in the axial direction of the rotor while being sealed by an adjusting screw, and that constitutes a raw material inlet and a raw material outlet, respectively. Since the periphery of the member is sealed, the sealing mechanism in the housing is downsized and a strong degree of tightness is obtained. Further, the airtightness between the raw material input port and the raw material discharge port and between the raw material storage chambers of the rotor is uniformly maintained in all the chambers, and the raw material is supplied from the low pressure portion to the high pressure portion or from the high pressure portion to the low pressure portion. Can be discharged. In particular, the air tightness between the raw material inlet and the raw material storage chamber is sufficiently maintained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a vertical rotary valve according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the same.

4 is an enlarged cross-sectional view taken along line 4-4 of FIG.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a view of a modified embodiment of the seal member.

FIG. 7 is an explanatory view of the development.

FIG. 8 is a diagram showing an example applied to an air flow type heating device of a vertical rotary valve.

FIG. 9 is a view of a modified embodiment of the pressing device.

FIG. 10 is a diagram of an embodiment using a spring.

FIG. 11 is a diagram of an embodiment that also uses a spring.

FIG. 12 is a view of a modified embodiment of the present invention.

FIG. 13 is a view of a modified embodiment of the present invention.

[Explanation of symbols]

 1: Rotary Valve 2: Housing 3: Raw Material Input Port 4: Rotor 6: Raw Material Discharge Port 30: Air Flow Inlet 32: Swirling Flow Generation Mechanism 33: Twisted Blade 34: Air Flow Speedup Mechanism 406: Raw Material Storage Chamber

Claims (5)

[Scope of utility model registration request] 1. A housing having a raw material inlet and an air flow inlet at an upper portion and a raw material outlet at a lower portion, a rotor provided inside the housing and horizontally rotating around a vertical axis and having a raw material storage chamber, and a rotor of the rotor. The upper and lower sealing members provided with communication holes that are vertically interposed to individually connect the raw material inlet and the discharge port and the rotary moving raw material storage chamber, and are sealed by an adjusting screw installed around the upper cover of the housing. While having the above-mentioned structure, a pressing mechanism that inserts the upper cover and directly presses the seal member in the axial direction of the rotor, and forms the raw material inlet and the airflow inlet , respectively.
The member seals and inserts the opening formed in the upper cover to communicate with the opening of the upper sealing member, and the raw material introduced from the raw material inlet into the raw material storage chamber is rotated by the rotor to discharge the raw material and the airflow inlet. The vertical rotary valve is characterized in that it is transferred to the outside by an air flow supplied from the air flow inlet. 2. The vertical rotary valve according to claim 1, wherein the air flow contains a heating medium. 3. The vertical rotary valve according to claim 1, wherein a swirl flow generating mechanism is provided at the air flow inlet. 4. A vertical rotary valve according to claim 1, wherein an air flow speed increasing mechanism is provided at the air flow inlet. 5. The vertical rotary valve according to claim 3, wherein the swirl flow generating mechanism is formed of a twist blade.