JP2000329240A - Double taking-out valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double taking-out valve with satisfactory seal performance. SOLUTION: This double taking-out valve comprises an upper chute 12 provided with a circular discharge port 11 in the lower end, upper valve element 14 having a cone side surface 13 of lower end diameter larger than an internal diameter of the circular discharge port 11 to open/close it by vertical movement, lower chute 17 arranged to be opposed by having a clearance 15 under the upper chute 12 to be provided with a circular input port 16 in the upper end, lower valve element 19 having an inverted cone side surface 18 of upper end diameter larger than an internal diameter of the circular input port 16 to open/ close it by vertical movement, intermediate hopper 20 connecting the upper/lower chutes 12, 17 to be provided with a space for the upper/lower valve elements 14, 19 to vertically move, and a lift means 21 vertically moving the upper/lower valve elements 14, 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double cut-out valve which is small, has a simple structure, and can reliably seal a material.

[0002]

2. Description of the Related Art Conventionally, for example, a rotary valve has been used as a cut-out valve for discharging dust in a chute collected by a dust collector or the like. The rotary valve is a sliding valve that performs opening and closing operations using a sliding surface of a rotating body. The rotary valve is attached to a lower portion of a chute and rotated to perform cutting. By using a rotary valve, it was possible to cut off the inside of the dust collector that was decompressed, from the outside.

[0003]

However, in the conventional rotary valve, it is necessary to provide a gap between the rotating body and the casing in advance in order to smoothly rotate the rotating body. The structure was prone to occur. In addition, when the fluid in the chute is a harmful gas, there are many problems in the sealing properties such as the possibility that the harmful gas leaks to the outside. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a double cutout valve having good sealing properties.

[0004]

According to the present invention, there is provided a double cut-off valve having an upper chute having a circular discharge port at a lower end, and a conical side surface having a lower end diameter larger than the inner diameter of the circular discharge port. An upper valve body that moves up and down to open and close the circular discharge port, a lower chute that is disposed opposite to the upper chute with a gap below the upper chute, and has a circular input port at an upper end, and an upper end diameter of the circular chute. It has an inverted conical side that is larger than the inside diameter of the inlet,
A lower valve body that moves up and down to open and close the circular inlet, an intermediate hopper that connects the upper chute and the lower chute, and has a space in which the upper valve body and the lower valve body move up and down, and the upper valve body And elevating means for moving the lower valve element up and down.

The elevating means includes, for example, a linearly moving actuator such as a screw jack, an electric cylinder, an air cylinder, a hydraulic cylinder, or a hydraulic motor,
A combination of an electric motor with a cam and a crank mechanism is used. In addition, the conical side, in addition to the side of the cone,
Including the side of the truncated cone. The inverted conical side surface is a shape in which the conical side surface is turned upside down. Since the upper valve body and the lower valve body can be moved up and down by the elevating means, the circular outlet and the circular inlet can be reliably closed respectively.
Further, in the double cut-out valve according to the present invention, the elevating means comprises linear driving means provided above the upper chute, and the output shafts thereof are provided with upper and lower stoppers respectively at the upper and lower sides, and the upper stopper is provided at the upper part. A compression spring is disposed between the upper valve body and the lower valve body that is connected to the valve body and the lowering rod that penetrates the lower valve body, and the upper valve body is lifted by the raising and lowering rod. Closing the circular discharge port by the body and opening the circular input port by the lower valve body, and lowering the elevating rod to open the circular discharge port by the upper valve body and the circular input by the lower valve body. It is also possible to perform an obstruction of the mouth. As described above, since the compression spring is arranged between the upper valve body and the lower valve body, a plurality of valve bodies can be linked by one elevating means.

Further, in the double cut-out valve according to the present invention, the elevating means comprises a linear driving means provided above the upper chute, and its output shaft is provided with upper and lower stoppers at upper and lower sides, respectively. A compression spring is disposed between the upper valve body and the lower valve body that is connected to the elevating rod that penetrates the upper valve body and the lower valve body, and the elevating rod rises. When the distance between the upper stopper and the upper end of the upper valve body at the time is a slide length S1 and the rising stroke of the lower valve body is a lifting stroke S2, S1> S2. it can. The linear driving means refers to a device that performs a linear reciprocating motion such as a screw jack, an electric cylinder, an air cylinder, and a hydraulic cylinder. With this configuration, when the upper valve body or the lower valve body is moved by operating the elevating rod,
One of the circular outlet and the circular inlet can be always closed. Here, it is also possible to prevent the material from being clogged by ejecting air from the inside of the lifting rod by making the lifting rod a hollow structure. With this configuration, it is possible to prevent the material from being clogged and to smoothly perform the operation. Also, the upper chute is
It is also possible that the shaft is inclined with respect to the vertical direction, and the elevating means is provided above the circular outlet of the upper chute so as to protrude outward from the upper chute. With this configuration, it is possible to attach the elevating means regardless of the shape of the upper chute, and it is possible to easily perform maintenance on the elevating means. Further, the upper chute is provided in connection with a discharge port of a screw conveyor provided in a horizontal direction, the elevating means is provided above the discharge port, and the upper valve body avoids a screw shaft of the screw conveyor. And the lower valve body. With this configuration, the lifting means can be mounted above the screw shaft to avoid breakdown of the lifting means due to dust, and can be easily mounted on a commercially available screw conveyor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. As shown in FIG.
The double cut-out valve 10 according to the embodiment has an upper chute 12 having a circular discharge port 11 at a lower end, and a conical side surface 13 having a lower end diameter larger than the inner diameter of the circular discharge port 11. An upper valve body 14 that opens and closes the discharge port 11, a lower chute 17 that is disposed opposite to the upper chute 12 with a gap 15 below the upper chute 12 and has a circular input port 16 at the upper end, A lower valve body 19 having an inverted conical side surface 18 larger than the inner diameter and moving up and down to open and close the circular input port 16
And an intermediate hopper 20 that connects the upper chute 12 and the lower chute 17 and has a space in which the upper valve body 14 and the lower valve body 19 move up and down, and an elevating means that moves the upper valve body 14 and the lower valve body 19 up and down (Linear driving means). As a result, the powder 26 can be cut out by a predetermined amount. The details will be described below.

[0008] The circular outlet 11 of the upper chute 12 is provided so as to open vertically downward, and the upper chute 12 is provided with its axis centered in the vertical direction except for its lower opening. A flange 22 is provided at the upper end of the upper chute 12 and is connected to a flange 25a of a main body 25 such as a dust collector for discharging the powder 26 by a plurality of bolts 23 and nuts 24. The upper chute 12 has an outlet member 27 at its lower part. Main body of upper chute 12 and outlet member 2
7 are flanges 28 and 29 and a plurality of bolts 23, respectively.
Has been fixed by. The circular outlet 11 is formed below the outlet member 27. A flange 20 a provided on the upper end of the substantially cylindrical intermediate hopper 20 is fixed to a flange 28 provided below the upper chute 12 with a plurality of bolts 23. Also, the intermediate hopper 20
Is gradually reduced in diameter from near the center to below, and has a flange 32 at the lower end. The flange 32 of the intermediate hopper 20 is fastened and fixed to the flange 31 provided above the lower chute 17 having the circular inlet 16 by a plurality of bolts 23 and nuts 24. Since the lower side surface of the intermediate hopper 20 is gradually reduced in diameter and has an inverted conical side shape, the powder 26 is easily dropped when the circular inlet 16 is opened. I have.

The upper valve body 14 is substantially frustoconical and has a lifting rod 34 inserted in the center. The periphery of the lower portion of the conical side surface 13 is sealed by a metal touch structure in which an inner corner of the circular discharge port 11 abuts in an edge shape. The metal touch structure seals the structure, which simplifies the structure and extends the life of the machine.In addition, since the seal is made by abutting the edges, the material that has caught can be cut, causing trouble. Can be reduced. An inverted conical side surface 18 is provided at a lower portion of the lower valve body 19, and a conical side surface 33 having the same shape as the conical side surface 13 of the upper valve body 14 is provided at an upper portion thereof. Since the conical side surface 33 is provided, as shown in FIGS. 2 and 3, the powder 26 placed on the slope portion of the conical side surface 33 falls outside the lower valve body 19, and the lower valve body 19 and the lifting rod The powder 26 is prevented from being caught in the sliding portion between the sliding member 34 and the sliding member 34. Also, since the lower valve element 19 can be fitted inside the lower part of the upper valve element 14, the minimum distance between the upper valve element 14 and the lower valve element 19 can be reduced, and the double cut-out valve 10 Can be reduced in size. In addition, the lifting rod has a hollow structure, and a plurality of holes are formed on its side, and the holes are used to eject air from the inside of the lifting rod to prevent the material from being clogged. Is also possible.

The air cylinder 21 is provided above the circular discharge port 11 of the upper chute 12 so as to protrude outward from the upper chute 12. An output shaft 35 of the air cylinder 21 is fixed to a lifting rod 34 by a fixing means such as a screw. Are linked.
Above and below the lifting rod 34, an upper stopper 36,
A lower stopper 37 is provided, and the upper valve body 14 and the lower valve body 1 are provided.
The upper valve body 14 and the lower valve body 19 urged up and down by a compression spring 38 arranged in the middle of 9 are held so as not to move further up and down. here,
The positional relationship between the upper and lower stoppers 36 and 37, the upper valve body 14, and the lower valve body 19 will be described. As shown in FIG.
When the lifting rod 34 is in the neutral position, the upper valve body 14 and the lower valve body 19 are in close contact with the circular outlet 11 of the upper chute 12 and the circular inlet 16 of the lower chute 17, respectively. In this state, the upper stopper 3
6 and the upper end of the upper valve body 14, and between the lower stopper 37 and the lower end of the lower valve body 19, the gaps L1 and L
The upper valve body 14 and the lower valve body 19 are structured so as to be in close contact with the circular discharge port 11 and the circular input port 16 by only the compression spring 38, respectively. As shown in FIG. 2, when the lifting rod 34 is lowered, the opening of the circular discharge port 11 by the upper valve body 14 and the closing of the circular input port 16 by the lower valve body 19 can be performed. When the lifting rod 34 is raised, the upper valve body 14
To close the circular discharge port 11 and to open the circular input port 16 by the lower valve element 19.

As shown in FIG. 3, the distance between the upper stopper 36 and the upper end of the upper valve body 14 when the lifting rod 34 is raised is defined as a slide length S1, and the rising stroke of the lower valve body 19 is the lifting stroke. When S2, S1> S2
There is a relationship. Further, as shown in FIG.
4, the lower stopper 37 and the lower valve body 1
Assuming that the distance from the lower end of No. 9 to the lower end is the slide length S3, and the lowering stroke of the upper valve body 14 is the raising / lowering stroke S4, there is a relationship of S3> S4. S1-S2 = S3-S4
This difference is caused by the upper valve element 1 described with reference to FIG.
4 is equal to the sum L1 + L2 of the distances of the gaps formed between the upper end of the upper valve 4 and the upper stopper 36 and between the lower end of the lower valve element 19 and the lower stopper 37. By forming the gaps L1 and L2 in advance, when the lifting rod 34 moves up and down, FIG.
As shown in (1), the upper valve body 14 or the lower valve body 19 can reliably close one of the corresponding circular discharge port 11 or circular input port 16, so that the sealing performance can be improved. The sealing is performed by the compression spring 38, and even when the machine stops due to a power failure or the like, the circular discharge port 11 is closed.
Alternatively, since one of the circular inlets 16 is always closed, no harmful gas leaks from the lower chute 17.

Next, the state of the double cut-out valve 10 during operation will be described with reference to FIGS. As shown in FIG. 1, when the powder 26 falls in the upper chute 12 while the circular discharge port 11 is closed by the upper valve body 14, the powder 26 is blocked by the upper valve body 14. And are stacked in the upper chute 12. Next, as shown in FIG. 2, when the air cylinder 21 is operated to lower the output shaft 35 and the lifting rod 34 connected thereto, the upper stopper 36 provided on the upper part of the lifting rod 34 The upper valve body 14 is pushed down by contacting the upper end of the body 14. At this time, the lower valve element 19 receives a downward force from the upper valve element 14 via the compression spring 38, but the inverted conical side surface 18 is fitted into the circular input port 16 of the lower chute 17 and moves further downward. Because it is not possible, lower valve body 1
Reference numeral 9 denotes a state in which the circular insertion port 16 is kept closed. Then, the lower stopper 37 provided at the lower portion of the lifting rod 34 moves downward while being separated from the lower valve body 19.

When the upper valve body 14 is pushed down and the circular discharge port 11 is opened, the powder 26 falls into the intermediate hopper 20 along the conical side surface 13 of the upper valve body 14. At this time, since the circular inlet 16 is in a closed state, the powder 26 is stored in the intermediate hopper 20 as it is. Next, the output shaft 35 of the air cylinder 21 and the lifting rod 34
When the lowering is stopped and raised, only the upper valve 14 rises from the state shown in FIG. 2 while the circular inlet 16 is closed by the lower valve 19. Then, the upper valve body 14 contacts the circular outlet 11 and closes it, and then, as shown in FIG. 3, the lower stopper 37 contacts the lower end of the lower valve body 19 and pushes it up. At this time, the upper valve body 14 receives a force upward from the lower valve body 19 via the compression spring 38, but the conical side surface 13 fits into the circular discharge port 11 of the upper chute 12 and moves further upward. Therefore, the upper valve body 14 is in a state in which the circular discharge port 11 is closed. When the lower valve body 19 is pushed up and the circular inlet 16 is opened, the powder 26 falls along the conical side surface 33 of the lower valve body 19 and the side surface of the intermediate hopper 20 and is injected into the lower chute 17. . By repeating this procedure, a fixed amount of the powder 26 can be continuously cut out in a reliably sealed state.

Next, a double cutoff valve 40 according to a second embodiment of the present invention will be described with reference to FIGS. The double cut-out valve 40 has the same shape as the double cut-out valve 10 except that the shape of the output shaft of the upper chute and the air cylinder is different. The same numbers are assigned and the description is omitted.
The upper chute 41 of the double cutout valve 40 is provided so as to be connected to a discharge port 43 of a screw conveyor 42 provided in a horizontal direction, and an air cylinder 44 which is an example of a lifting / lowering means (linear driving means) is provided with a discharge port 43. Above, is connected to the lifting rod 34 to which the upper valve body 14 and the lower valve body 19 are attached, avoiding the screw shaft 46 of the screw conveyor 42. The details will be described below. The screw conveyor 42 has a casing 47 having a U-shaped cross section and an upper lid.
Is provided with a rotatable screw shaft 46, screws 48 and 49 are attached thereto, and a dust collecting fan 50 is provided at the end on the discharge port 43 side. The direction of the rotating blades of the screw 49 is opposite to the direction of the rotating blades of the screw 48, and powder such as dust collected at the end of the screw conveyor 42 by the dust collecting fan 50 is removed by the screw 4.
At 9, it is dropped into the discharge port 43.

An opening 51 is formed above the discharge port 43 of the screw conveyor 42, and an air cylinder 44 is attached to the opening 51 via a length adjusting member 51a. On the output shaft 45 of the air cylinder 44, upper portions of respective avoidance brackets 52 and 53 which stand up with a gap left and right of the screw shaft 46 are attached via attachment members 46a. The lower portion is connected to the lifting rod 34 via a mounting member 53a. Since the avoidance brackets 52 and 53 are attached with a sufficient gap formed in the vertical direction of the screw shaft 46, they do not collide with the screw shaft 46 even if the air cylinder 44 is started and moved in the vertical direction. . In addition,
The other structure and operation of the double cut-out valve 40 are substantially the same as those of the double cut-out valve 10 described in the first embodiment, and a description thereof will be omitted. Although the embodiment according to the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the present embodiment, an air cylinder is used as the elevating means. However, other than this, linear driving means such as a screw jack, an electric cylinder, and a hydraulic cylinder can also be used. In addition, the shape of the side surface of the upper and lower valve bodies is conical or inverted conical, but it can also be spherical, causing a gap even when the closing angle is shifted due to air cylinder mounting error etc. Without any sealing. In addition, a circular outlet,
Although the sealing of the circular inlet is performed by a metal touch structure, rubber or plastic for sealing may be laid on the contact portions. Further, it is also possible to adhere a lubricating resin sheet to the sliding surfaces of the intermediate hopper and the upper and lower valve bodies, so that the powder can be smoothly dropped.

[0016]

In the double cut-out valve according to the first to sixth aspects, the upper valve body and the lower valve body can be moved up and down by the elevating means, so that the size can be made compact. Since the moving directions of the upper valve body and the lower valve body are the same as the moving direction of the powder, it is possible to reduce failures due to biting. In particular, in the double cut-out valve according to the second aspect, since the compression spring is disposed between the upper valve body and the lower valve body, a plurality of valve bodies can be linked by one elevating means. . In the double cut-out valve according to the third aspect, since the slide length S1 of the lifting rod is longer than the lifting stroke S2 of the valve body, the other valve body is moved before the one valve body moves up and down to open one chute. Since the other chute is slid and closed, the seal can be surely sealed. Also, since the spring has a seal structure, there is little trouble. In the double cut-out valve according to the fourth aspect, since the inside of the lifting rod has a hollow structure and air can be blown out from the inside to prevent clogging of the material, the maintenance work can be omitted. In the double cut-out valve according to the fifth aspect, since the elevating means can be mounted so as to protrude outward from the inclined upper chute, it is not necessary to mount the elevating means in an inclined manner, and the manufacturing is simplified. In the double cut-off valve according to the sixth aspect, since the elevating means can be provided at a position avoiding the screw shaft of the screw conveyor, the manufacture and mounting of the double cut-out valve can be simplified.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a double cutout valve according to a first embodiment of the present invention.

FIG. 2 is a front sectional view when the lifting rod of the double cutout valve is lowered.

FIG. 3 is a front sectional view when the lifting rod of the double cutout valve is raised.

FIG. 4 is a front sectional view of a double cutout valve according to a second embodiment of the present invention.

FIG. 5 is a sectional side view of the same.

[Explanation of symbols]

10: double cut-out valve, 11: circular outlet, 12: upper chute, 13: conical side, 14: upper valve body, 15: gap, 16: circular inlet, 17: lower chute, 18: inverted conical side, 19: Lower valve body, 20: Intermediate hopper, 20
a: flange, 21: air cylinder (elevating means), 2
2: Flange, 23: Bolt, 24: Nut, 25: Body, 25a: Flange, 26: Powder, 27: Outlet member, 28, 29: Flange, 31, 32: Flange, 3
3: Conical side surface, 34: lifting rod, 35: output shaft, 3
6: Upper stopper, 37: Lower stopper, 38: Compression spring, 40: Double cutout valve, 41: Upper chute, 4
2: screw conveyor, 43: outlet, 44: air cylinder, 45: output shaft, 46: screw shaft, 46a:
Mounting member, 47: casing, 48, 49: screw, 50: dust collecting fan, 51: opening, 51a: length adjusting member, 52, 53: avoidance bracket, 53a: mounting member

Claims (6)

[Claims] 1. An upper chute having a circular outlet at a lower end, an upper valve body having a conical side surface having a lower end diameter larger than the inner diameter of the circular outlet, and moving up and down to open and close the circular outlet; A lower chute provided with a circular inlet at the upper end and a reverse conical side surface whose upper end diameter is larger than the inner diameter of the circular input port, which is disposed opposite to the upper chute with a gap, and moves up and down. A lower valve body that opens and closes a circular inlet, an intermediate hopper that connects the upper chute and the lower chute, and has a space in which the upper valve body and the lower valve body move up and down, and the upper valve body and the lower valve body. A double cut-off valve, comprising: elevating means for moving up and down. 2. The double cut-off valve according to claim 1, wherein said elevating means comprises a linear drive means provided above said upper chute, and its output shafts are provided with upper and lower stoppers respectively at the top and bottom. A compression spring is arranged between the upper valve body and the lower valve body that are connected to the upper valve body and the lower valve body and that penetrates the lower valve body. The circular discharge port is closed by the upper valve body and the circular input port is opened by the lower valve body, and the lower valve body is lowered to open the circular discharge port by the upper valve body and the lower valve body. A double cut-off valve, wherein the circular inlet is closed. 3. The double cut-off valve according to claim 1, wherein said elevating means comprises linear driving means provided above said upper chute, and its output shafts are provided with upper and lower stoppers respectively in the upper and lower directions. A compression spring is disposed between the upper valve body and the lower valve body that is inserted through the upper and lower valve bodies, and a compression spring is disposed between the upper valve body and the lower valve body. When the distance between the upper stopper and the upper end of the upper valve body at this time is a slide length S1, and the rising stroke of the lower valve body is a lifting stroke S2, S1> S2. Double cut-off valve. 4. The double cut-off valve according to claim 2, wherein the lifting rod has a hollow structure, and air is blown out from the inside of the lifting rod to prevent clogging of the material. Double cut-off valve. 5. The double cut-out valve according to claim 1, wherein the upper chute is provided with the axis thereof inclined with respect to a vertical direction, and the lifting / lowering means is provided on the upper chute. A double cut-out valve, which is provided above a circular discharge port and protrudes outward from the upper chute. 6. The double cut-off valve according to claim 1, wherein the upper chute is provided so as to be connected to a discharge port of a screw conveyor provided in a horizontal direction, and the elevating means is provided. Is connected to the upper valve body and the lower valve body above the discharge port while avoiding the screw shaft of the screw conveyor.