JPH0592238U - Vertical rotary valve - Google Patents

Abstract

(57) [Summary] [Purpose] A raw material introduced from the raw material inlet enters the raw material storage chamber and is smoothly and quickly discharged to the raw material outlet by the airflow supplied from the airflow inlet. Type rotary valve. [Composition] A raw material inlet 3 and an air flow inlet 30 are provided on the upper part,
A housing 2 having a raw material discharge port 6 at a lower portion, a rotor 4 provided inside the housing 2 and horizontally rotating around a vertical axis and having a raw material storage chamber 406, and a raw material inlet 3 provided above and below the rotor 4 and The upper and lower seal members 7 and 8 each having a communication hole 701 for individually communicating the discharge port 6 and the rotatably moving raw material storage chamber 406, and the seal member 7 installed on the upper cover 202 of the housing 2 by an adjusting screw 4, a pressing mechanism for directly pressing in the axial direction, from the raw material inlet 3 to the raw material storage chamber 406.
The raw material charged therein is transferred to the raw material discharge port 6 and the airflow inlet 30 by the rotation of the rotor 4, and is transferred to the outside by the airflow supplied from the airflow inlet 30.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a vertical rotary valve used for supplying / discharging powders and grain raw materials.

[0002]

[Prior 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, the raw material is put into the raw material storage chamber formed in the horizontally rotating rotor from the raw material input port, and the raw material storage chamber is insulated by the rotation of the rotor from the raw material input port. It is designed to discharge the raw material from 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 has previously proposed Japanese Patent Application No. 59-160075. In this system, 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 and the raw material storage chamber that rotates are individually connected to each seal member. It is provided with a pressing opening and a pressing mechanism that presses the upper sealing member downward, which improves the airtightness of the rotary valve and the life and durability of the sealing member. Can be done.

[0004]

[Problems to be solved by the device]

 The above-mentioned conventional technology aims at improving the sealing device in order to improve the airtightness between the rotor and the raw material inlet / outlet, but the raw material is not transferred from the raw material inlet to the raw material outlet. , The material was dropped by gravity due to its own weight. Therefore, it may be difficult to smoothly transfer viscous raw materials, and it has been desired to ensure that any raw material can be smoothly discharged.

Therefore, the object of the present invention is to inherit the sealing device technology of Japanese Patent Application No. 59-160075, while the raw material charged from the raw material input port 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 the generated air flow.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a housing having a raw material inlet and an airflow inlet in the upper part and a raw material outlet in the lower part, and a raw material storage chamber which is provided inside the housing and horizontally rotates about a vertical axis. Installed on the upper cover of the housing and the upper and lower sealing members with a communication hole that is installed above and below the rotor and that individually connects the raw material inlet and the discharge port and the raw material storage chamber that rotates and moves. The adjustment mechanism consists of a pressing mechanism that directly presses the seal member in the axial direction of the rotor.

[0007]

[Action]

 According to the above means, since the airflow inlet for blowing the airflow into the raw material storage chamber is provided, the raw material can be transferred much smoother and faster than the conventional case where the raw material is transferred by gravity falling by gravity. You can do it. 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 input port and raw material discharge port. The density is obtained.

[0008]

【Example】

 Next, an embodiment of the present invention will 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 cross-sectional view taken along line -5, and FIG. Reference numeral 1 is a rotary valve, and the valve housing 2 is in the shape of a cylindrical container, and is composed of a cylindrical main body 201, and a disk-shaped upper cover 202 and lower cover 203 that close the upper and lower sides of the main body 201. The flanges 204 and 205, which are provided on the outer periphery of the upper and lower ends of the main body 201 in a radial direction, and the peripheral portions of the covers 202 and 203 are connected by bolts and nuts 207 ... With packings 206 and 206 interposed. As a result, a closed chamber 208 is formed in the housing 2.

An opening 214 that forms a part of the raw material charging port is formed in a part near the peripheral part of the upper cover 202, and the peripheral part of this part is an annular projection 215 that projects upward in an annular shape. In the practical example, the tubular member 301 constituting the raw material feeding port 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.

In addition, an opening 29 forming a part of the air flow inlet 30 is formed at 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 periphery of this part. The part is an annular protrusion 215 that protrudes upward in an annular shape. In the embodiment, a tubular member 31 constituting the air flow inlet 30 is vertically inserted and fitted, and a ground packing 302 is interposed between the tubular member 31 and the opening 29 to maintain the airtightness of both.

In the present 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. The airflow used may be sufficient.

A rotor 4 forming a valve body is provided in a chamber 208 in the housing 2. The rotor 4 is provided with disc-shaped upper and lower substrates 401 and 402, and is vertically provided in a peripheral portion between them. And a plurality of cylinders 403 ... And the upper and lower substrates 401, 402 are provided with the same number of openings 404, 405 communicating with the inside of each cylinder 403. A raw material storage chamber 406 is formed therein.

The rotor 4 is connected to a vertical drive shaft 5 provided so as to extend vertically through the central portions of the upper and lower substrates via a cylindrical holder 407 and a key 408, and the shaft 5 includes upper and lower covers 202 and 203. It extends to the outside of the upper and lower covers through ring-cylindrical portion-shaped through holes 209 and 210 provided in the central portion. 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). And, it supports up and down freely. In addition, the support stay 506 attached to the upper cover 202 supports the intermediate portion 507 of the upward extending portion via the bearing 508.

The rotor 4 is rotationally driven in the housing 2 by the drive shaft 5 described above, and the cylindrical bodies 4 constituting the raw material storage chambers 406 ... radiate at equal intervals as is apparent from FIG. In the embodiment, six pieces are arranged at the positions equidistant in the radial direction.

The raw 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-mentioned raw material input port 3 in the embodiment, and the point is that the same raw material storage port is provided at a position facing the raw material storage chamber 406 of the rotor 4 on one side. The positions of both sides 3 and 6 are set so that the chamber 406 does not communicate with the other. In this state, the raw material storage chamber 406 provided at a position 180 ° apart from the raw material storage chamber 406 is in direct communication with the air flow inlet 30 and the raw material discharge port 6.

The upper and lower substrates 401 and 402 of the rotor 4 face the seal plates 7 and 8 constituting the disc-shaped seal member, respectively. The lower seal plate 8 is disposed on the lower cover 203, the lower substrate 402 of the rotor 4 is slidably contacted from above with a predetermined pressure, and a part thereof is provided with a communication port 801 which communicates with the raw material discharge port 6 described above, and a central portion. The shaft 5 is provided with a through hole 702. Further, if the communication port 801 communicating with the discharge port 6 of the lower seal plate 8 is rotated downstream in the rotor rotation direction, for example, if the rotor 4 is rotated to the right in FIG. 1, the deaeration port 803 is provided in a portion on the back side of the paper surface. The deaeration port 803 is provided at a position where it is 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 raw material storage chamber 406 is evacuated by facing the degassing ports 803 and 213. I care.

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

A part of the above-mentioned 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, a packing 902 accommodated in a lower portion of the holder 901, and a gland packing 904 including a nut 903 for pressing the packing 902. And an adjusting screw 905 that vertically penetrates the nut 903 and abuts the lower end portion 906 with a part of the upper surface of the upper seal plate 7. A recess 703 that engages with the lower end 906 is provided on the upper seal plate 7, and the seal plate 7 is pressed by the screw rotation of the adjusting screw 905 to seal between the substrates 401 and 402 above and below the rotor and the seal plates 7 and 8. Adjust pressure. In order to equalize the pressure, a plurality of such pressing mechanisms 9 are preferably provided, and in the embodiment, they are provided 180 ° apart as shown in FIG. The engagement between the concave portion 703 and the adjusting screw 905 not only applies the above-mentioned 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. Incidentally, 7C in the figure is a stopper for preventing both 7A and 7B from rotating.

In the above, the raw material is charged from the raw material charging port 3, the raw material storage chamber of, for example, a faces the position directly below the raw material charging 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 the seal with. In this case, the sealing member is plate-shaped, and surface pressure is also 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, it communicates with the raw material discharge port 6 and discharges the raw material in the storage chamber. After discharging, the rotor is rotated to reach the degassing holes 803 and 213, and degassing is performed to smoothly receive the next raw material. 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, and 11 is an inlet provided in a part of the lower cover 203, which are pipes 101 and 111 equipped with switching valves 102 and 112. The medium is introduced into the chamber 208 by communicating with the outside. 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. Cooling.

When the raw material is heat-treated in the next step, steam or hot water is supplied as preheat to heat the raw material. 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 the fine raw material from leaking 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 provided with a heating pipe 609 through which superheated steam is aerated and heats the raw material while carrying it by air flow, a cyclone 603 that separates the raw material after the heat treatment from the superheated steam, and a raw material discharge port of the cyclone 603. Used as an exhaust valve 608 that discharges the raw material out of the system in an airtight manner, a circulation blower 605 that circulates the superheated steam, a super heater 607 that heats the superheated steam whose temperature has decreased due to contact with the raw material, and a raw material charging device. It is composed of a vertical rotary valve 100 that is vertically movable.

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, the suction port of the circulation blower 605, the discharge port of the blower 605 and the heating medium inlet of the vertical rotary valve 100 are connected via the super heater 607 by pipes 610, 611 and 612, respectively. Then, the circulation system 601 is formed. 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 configured as described above, and the raw material supplied from the raw material feeder 614 to the vertical rotary valve 100 through the raw material feeding port 3 has the rotor 4 in FIG. After that, the material is discharged from the raw material discharge outlet 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 stream, 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 flows through the circulation systems 601 and 601 by the action of the circulation blower 605.

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. Instead of the adjusting screw passing through the packing 902 and the nut 903, the rod 910 is brought into contact with the upper seal plate 7, and the rod 910 is moved downward by supplying pressure oil to the cylinder 912 supported by the frame 911 to seal the seal. Pressurize the plate 7. In this embodiment, in order to keep the pressure on the sealing 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 detected by the ammeter 914, this signal is input to the controller 915, and the controller 915 instructs the servo valve 916 according to the signal to control the pressure of the cylinder 912. Adjust the pressure on the sealing surface. A cylinder pressure may be controlled by installing a pressure sensor 917 at the contact portion between the rod 910 and the upper seal plate 7 to detect the pressure. It is also possible to detect the amount of leak 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 provided in a part of the seal plate 8 and a free space is provided in a part of the lower cover 203. Providing a matching protrusion 220, the movement in the plane between the seal plate 8 and the lower cover 203 was restricted, and a spring 920 was arranged around the protrusion 220 to perform spring guide.

FIG. 11 shows a configuration in which a coil spring 930 is interposed between the end surface 906 of the adjusting screw 905 and the bottom surface of the recess 703 of the upper seal plate 7, and the depth of the recess 703 is increased to increase the screw tip. To prevent it 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 embodiments, and further, 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 separated from each other by 180 °, and one of the raw material inlet 3 and the air flow inlet 30 is provided. It's a part. A peripheral portion of the opening 29 is an annular protrusion 215 that protrudes upward in a ring shape. In the embodiment, a tubular member 31 constituting the air flow inlet 30 is vertically inserted and fitted, and between the tubular member 31 and the opening 29. The airtightness of both is maintained by interposing the gland packing 302. Inside the tubular member 31, a swirl flow generating mechanism 32 having a cone-shaped upper end and a lower end and a cylindrical intermediate portion is supported by the inner peripheral surface of the tubular member 31 via a twisting blade 33. ..

According to the embodiment shown in FIG. 12, the air flow (superheated steam) of the superheated medium 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 twist blade 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. An airflow 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. It is supported on the inner surface of the. According to the embodiment of FIG. 13, the air flow (heated steam) of the heating medium blown from the air flow inlet 30 is narrowed by the air flow accelerating mechanism 34 so that the air flow passage of the air flow inlet 30 is narrowed to increase the flow velocity and Discharge smoothly and quickly.

[0034]

[Effect of the device]

 As described above in detail, according to the present invention, the airflow inlet is provided 180 ° apart from the raw material inlet to the upper part of the housing so that the airflow is supplied to the raw material storage chamber and the raw material is discharged to the raw material outlet. Therefore, compared to the conventional device that discharges the raw material by gravity action, the raw material can be discharged more smoothly and quickly. Especially, since the raw material is transferred and discharged by the air flow, the transfer and discharge of the viscous material to a certain degree can be performed. It can be performed smoothly, quickly and efficiently, and can be used as a rotary valve in a line for thermal transformation of raw materials, heat treatment, sterilization, steaming, etc. by using an air flow and a heating medium together, and these treatments can be performed efficiently. Furthermore, a pressing mechanism that presses the seal member in the axial direction of the rotor is provided to seal the surroundings of the raw material inlet and raw material outlet, so the sealing mechanism inside the housing is downsized, and a tight seal is achieved. You get a degree.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a vertical rotary valve of 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 diagram of the same 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 utilizes a spring.

FIG. 12 is a diagram 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 Accelerating 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 seal members having communication holes that are vertically interposed to individually communicate the raw material inlet and discharge ports and the rotary moving raw material storage chamber, and the seal member installed on the upper cover of the housing by the adjusting screw to rotate the seal member to the rotor. Of the pressing mechanism that directly presses in the axial direction of the raw material, the raw material introduced into the raw material storage chamber from the raw material feeding port is transferred to the raw material discharge port and the air flow inlet by the rotation of the rotor, and the air flow is supplied from the air flow inlet. A vertical rotary valve characterized by being transferred to the outside. 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. The 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 generation mechanism is formed of a twisted blade.