JP2001304430A - Slide type gate valve for powdery and granular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent inside contamination of a slide type gate valve for powdery and granular material. SOLUTION: An opening slot 16 (refer to Fig.7) is vertically formed in the lengthwise upper part of each of pipes 17 and 18; the lower end part of each of guide rails 14 and 15 is fixed by being inserted into the opening slot 16 from the upper side and fitted into the pipes 17 and 18; the pipes 17 and 18 are fixed in the inside regions of a front frame member 42 and a rear frame member 43 by being spaced at a predetermined distance, respectively; air purges 119 and 120 are connected to the tip parts of the pipes 17 and 18; slits 21 and 22 are longitudinally formed in each of the pipes 17 and 18; the air is spouted toward the upper side and the like and thereby, inside contamination can be prevented by blowing off powdery and granular material such as a bolt and the like even if they deposit inside; and the exhaust of the air cylinders 5 and 6 is effectively used for feeding the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding gate valve for a granular material which opens and closes a granular material transport path for transporting the granular material with a gate, and particularly to a structure thereof.

[0002]

2. Description of the Related Art Conventionally, a sliding gate valve 501 for a granular material according to the prior art shown in FIGS. 15 and 16 has been proposed. An inlet hopper 540 and an outlet hopper 542 are connected by a base frame 544. Frame 504 having an opening 503
A gate plate container 546 for accommodating the gate plate 502 connected to the air cylinder 505 is connected thereto, and the air cylinder 505 is further connected to the gate plate container 546. Then, the gate plate 502 and the gate plate container 54
A sealing material 509 (provided with a gland packing or the like) that seals the gate plate 6 is fixed to the distal end of the gate plate container 546. Further, a guide rail 513 for guiding the gate plate 502 is formed in a lower area of the inlet hopper 540. The opening 503 is closed by extruding the gate plate 502 with the air cylinder 505, and the opening 503 is opened with the gate plate 502 by contracting the gate plate 502 with the air cylinder 505. The vertical powder transport path can be opened and closed. In addition, the sliding gate valve 501 for powder and granules is
Connected to external air and electrical equipment. Here, those with a square external shape are for a square rectangular discharge port, and are applied to the discharge of powder and granular materials such as conveyors and tank bottoms,
The one having a round outer shape is for a circular discharge port, and is applied for discharging a granular material such as a silo or a check bin. The structure is simple, there are few troubles, the maintenance is easy, and the sealing performance is improved by the sealing method according to the application.

[0003] However, there is a disadvantage that when the powder or granules are deposited on the inside of the frame-shaped body 504, especially on a screw portion or the like, and the powder or granules are foods, pharmaceuticals, chemicals, or the like, they cause internal contamination. is there.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent contamination of a sliding gate valve for powder and granular material inside.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the invention according to claim 1 provides a frame-like body having an opening,
An actuator disposed in the frame, a housing case connected to the frame, a gate plate that opens and closes the opening by performing a sliding motion with the actuator, and supports the gate plate from below. And a guide rail for guiding in the direction of the slide motion, and air is supplied to the guide rail, and a slit is formed in the guide rail so that air is ejected, and a slide for powder and granular material is provided. It is a type gate valve. Thereby, the above-mentioned subject can be achieved suitably.

According to a second aspect of the present invention, the guide rail is formed by fitting a guide plate from above into a pipe having an upper surface opening, and the slit is formed in the pipe. The sliding gate valve for a granular material according to claim 1. Thereby, the above-mentioned problem can be suitably achieved, and the introduction of air becomes easy.

According to a third aspect of the present invention, there is provided the sliding gate valve for granular material according to the second aspect, wherein the actuator is an air cylinder, and the exhaust of the air cylinder is introduced into the pipe. is there. Accordingly, the above-described problem can be suitably achieved, and a mechanism for supplying air to the guide rail can be simplified by effectively using the exhaust of the air cylinder.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sliding gate valve 1 for powder (hereinafter, simply referred to as a gate valve 1) according to a first embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, the gate valve 1 of the present embodiment includes a dust collector, a cyclone, a conveyor, a tank, a silo connected to a transport pipe for transporting powder for food, medicine, chemicals, and the like. It is connected to a discharge port of a check bin, a mixer, a screw feeder, or the like, and can be opened and closed to discharge the powder to the downstream side. That is, the gate valve 1 is a gate plate 2 that is a flat, oval-shaped plate material having a substantially square shape in plan view, a rectangular shape in front view, and a horizontally long ring band shape in side view, and the gate plate 2 is incorporated in a movable state. Frame 4 having an opening 3 as a case, a pair of air cylinders 5 and 6 as fluid pressure actuators for opening and closing the gate plate 2, and a storage case connected to the frame 4 And 7. As shown by a two-dot chain line in FIG. 1, the right end of the gate plate 2 is fixed to the connecting rod 8, and the gate plate 2 is disposed on the frame 4 so as to be movable in the left-right direction. The distal ends of the piston rods 50, 60 of the air cylinders 5, 6 are fixed perpendicular to the connecting rod 8. The gate plate 2 is slid in a predetermined direction, here a horizontal direction, by the air cylinders 5 and 6, and the gate plate 2 is stored in the storage case 7 when the air cylinders 5 and 6 are extended, so that the opening 3 is opened. The opening 3 is closed by the gate plate 2 when the air cylinders 5 and 6 are opened and retracted. That is, the air cylinders 5 and 6 push the gate plate 2 to open the opening 3 and pull the gate plate 2 to close the opening 3. Also,
A sealing member 9 for preventing the powder adhered to the gate plate 2 from being discharged to the storage case 7 when the gate plate 2 is opened and closed.
6 (see FIG. 6) is fixed to the through-hole of the frame 4 on the side of the storage case 7, and a rectangular frame-shaped sealing member 10 for sealing between the frame 4 and the gate plate 2 is attached to the opening 3. It is fixed as an inner frame on the inner peripheral edge, that is, inside the frame-shaped body 4 as an outer frame. The accommodation case 7 accommodates an air equipment unit 11 and an electric equipment unit 13. Hereinafter, each element will be described in detail.

(Explanation of the Frame 4) The frame 4 is formed by connecting a plurality of metal (aluminum or the like) block members. That is, as shown in FIG. 1 to FIG.
2 with a predetermined interval provided in parallel with the sliding direction of the gate plate 2
It is composed of two side frame members 40 and 41, and a front frame member 42 and a rear frame member 43 whose ends are connected to each other at right angles to the side frame members 40 and 41, and are connected to each other by screws or the like. It is a thing. A pair of air cylinders 5 and 6 are installed in the outer region of the side frame members 40 and 41 in parallel with them, and the base ends of the cylinder tubes 51 and 61 are fixed to the left and right ends of the rear frame member 43 with the air cylinder fixed. Parts 43a, 4
3b and the cylinder tubes 51, 6
1 and the front side of the front frame member 42
Are fixed to the fixing portions 70 and 71 (see FIG. 3) at both ends by screws or the like. The front frame member 42 has an oval guide hole 4 through which the gate plate 2 can be inserted.
6 are formed. The sealing member 9 is inserted into the guide hole 46.
Is provided. The side frame members 40 and 41 are set to be shorter than the length of the gate plate 2 and are long block members having a rectangular cross section. The lateral width of the front frame member 42 and the rear frame member 43 is set to be larger than the width of the gate plate 2 and is a long block material having a rectangular cross section. As shown in FIG. 1, when the gate plate 2 closes the opening 3, a gap M is formed to prevent troubles due to driving, and the gap M is sealed by the seal member 10. . Side frame members 40, 4
1, the front frame member 42 and the rear frame member 43
a, 44b (see FIG. 3 and the like). The seal member 10 is fixed to the front frame member 42 and the rear frame member 43 via bolts 44c (see FIG. 8) and the like via support members 44d. Guide rails 14 and 15 described below
Bolts (not shown) on front frame member 42 and rear frame member 43
It is fixed to the frame-like body 4 by the method and the like.

Next, the side frame members 40 and 41, the front frame member 4
2. A plurality of connection holes 47 and 48 are formed in the upper surface and the lower surface of the rear frame member 43, respectively, for connection to the flange of the joint part of the granular material device. These connecting holes 4
The size and position of 7, 48 are also substantially the same as the flange of the powder equipment joint.

That is, the gate valve 1 of the present embodiment
The upper surface and the lower surface of the frame 4 are brought into contact with the flanges of the powder equipment joints on the upstream side and the downstream side, and the connection holes 47,
48 and connecting hole of the flange of the powder equipment joint (not shown)
Are connected by inserting a bolt or the like through the holes and fixing them.

The conventional sliding gate valve 501 for granular material shown in FIGS. 15 and 16 has a structure in which the gate plate 2 is pushed and closed, and the gate 2 is pulled open.
2 has a recessed portion, the air cylinder 505 protrudes outward, and the length of the air cylinder 505 in the axial direction is at least three times the length of the gate portion,
There is a demand for miniaturization. Therefore, in this embodiment,
By adopting a structure in which the gate plate 2 is pulled and closed and the gate 2 is pushed and opened, the length of the air cylinders 5 and 6 in the moving direction can be significantly reduced, which contributes to downsizing and cost reduction.

In order to support the gate plate 2 from below, a pair of guide rails 14 and 15 are erected on the lower side, and the gate plate 2 is sandwiched between the seal member 10 and the guide rails 14 and 15 from above and below. The guide rails 14 and 15 are covered with a polymer resin film, and the surface of the gate plate 2 may be coated with the polymer resin film. Since the polymer resin film has low frictional resistance and high abrasion resistance, the frictional resistance applied to the sliding surface between the guide rails 14 and 15 and the gate plate 2 is reduced, and the durability is improved. Pipes 17 and 18 are arranged below the guide rails 14 and 15 in parallel.
7 and 8 in the longitudinal direction, respectively.
) Are formed vertically. The lower ends of the guide rails 14 and 15 are connected to the opening grooves 16 of the pipe members 17 and 18.
The pipes 17 and 18 are fixed by inserting upper open ends of the pipes 17 and 18 into grooves provided on both sides of the guide rails 14 and 15 from above. These pipes 17 and 18
Each of the pipes 17 and 18 is fixed to the inner region of the front frame member 42 and the rear frame member 43 at a predetermined interval.
Further, the pipes 17 and 18 have slits 21 and 22, respectively.
2 (see FIG. 7) are formed in the longitudinal direction, and the air is blown obliquely upward, sideways, and the like. Thereby, even if powder accumulates inside the bolts or the like, internal contamination caused by powders such as foods, chemicals, and chemicals can be prevented by blowing off the air. This air supply effectively utilizes the exhaust air from the air cylinders 5 and 6. Guide rail adjusting screw 23 (FIG. 6A)
Adjust the vertical position of the pipes 17, 18 with
The delicate clearance between the gate plate 2 and the guide rails 14 and 15 can be adjusted. In the case where the area of the opening 3 is relatively small, as shown in FIG. 4, the gate plate 2 is less drooping, so that a type without the guide rails 14 and 15 is also possible. A pair of convex portions (or protruding plates or the like) 49 each having a tapered surface made of a short round bar or the like are fixed to the rear frame member 43 so as to face the opening, and the end surface of the gate plate 2 is also formed as a tapered surface. When the gate plate 2 is closed, the tapered surfaces are joined together.
Can be forcibly supported, and the structure can be simplified. The facing portion 49 is fixed to the rear frame member 43 by screws 49a. At this time, the upper region of the gate plate 2 is sealed with the sealing member
The gate plate 2 is fixed so as to sandwich the gate plate 2 from above and below with the seal member 10.

(Description of Air Cylinders 5 and 6) In the air cylinders 5 and 6, the piston rods 50 and 60 are reciprocated in the front-rear direction by high-pressure air. The gate plates 2 are connected by orthogonal connecting rods 8 and extend to the left region of the connecting rods 8. The air cylinders 5 and 6 are supplied with power from the electrical equipment unit 13 and
The driving state is controlled by an electric signal from the apparatus, and high-pressure air is supplied via the air equipment unit 11.

Further, sensor switches 62 and 63 (see FIGS. 1 and 3) are formed at both ends of the cylinder case 61, respectively, and define the limit of the movement of the gate plate 2 in the front-rear direction. That is, the piston rods 5 of the air cylinders 5 and 6
The range of movement (stretching / contracting) of 0 and 60 is such that the opening 3 is closed by the gate plate 2 when they are most contracted, and the opening 3 of the frame 4 is maximized when they are fully extended. It is set to open.

(Explanation of the storage case 7)
The rectangular box is formed in consideration of dust resistance and the like, and is rectangular when viewed from above. The front ends of the front frame member 42 and the cylinder tubes 51 and 61 are bolted to bolts 72 and 7 respectively.
3, 74 fixed. The height of the storage case 7 is determined by the piston rods 50 and 60 and the air equipment unit 1.
1, it can accommodate the electrical equipment unit 13 and the like,
The length L of the internal space of the storage case 7 is
Of the stroke S or more, and as shown in FIG.
The width W is set to be equal to or larger than the interval between the outer edges of the cylinder tubes 51 and 61. Furthermore, it is connected flush with the frame-shaped body 4 and has a smart appearance.

(Description of Seal Member 9) This seal member 9
Is a horizontally elongated flat annular (flat oval shape) member that seals a sliding portion of the gate plate 2 as shown in FIGS. 6 and 11 and is a guide formed on the frame 4 and through which the gate plate 2 is inserted. It is fixed to the hole 46 (see FIG. 11). Seal member 9
The gland packing 92 is press-fitted into the seal housing 91. The seal housing 91 has a substantially saw-tooth shape (wave shape) or the like with a rounded tip at the front sectional view, and a horizontally long flat ring band shape (flat oval shape) at the side view. , 90b). A substantially sawtooth shape is preferable, but a bamboo shoot shape, a knot shape, a shade shape, and other shapes may be used. A plurality (two in this case) of the step portions 90a and 90b are provided at predetermined intervals. The seal housing 91 has an opening at the rear as viewed from the front, a seal retainer 93 is fitted into the opening, and a reduced diameter portion 93a is provided at the inner front end. Reduced diameter portion 93a of seal holder 93
Are fixed so as to bite into the upper part of the gland packing 91. The seal retainer 93 has a horizontally long, flat ring band shape (flat oval shape) in a side view, and a plurality (here, 2
Of the front frame member 4 with the holding screws 94 (see FIG. 11).
It is fixed to 2. Thus, the gland packing 9
2 is sandwiched between the gate plate 2 and the inner wall surface of the seal housing 91, so that a substantially sawtooth-shaped step is formed at the upper portion. To describe the details of the seal housing 91, as shown in FIG. 6B, when viewed from the front, the inner wall surface of the seal housing 91 is inclined to the right with respect to the axial direction (moving direction) of the gate plate 2 so as to be steep. The inclined band surface 95, the annular band surface 96 that is gently inclined obliquely upward to the right with respect to the axial direction (moving direction) of the gate plate 2, and the above-described step portion 90 a that continues to the inclined band surface 95. An annular band surface 97 similar to the above-described annular band surface 96, a stepped portion 90b continuous therewith, and an annular band surface 9 similar to the above-described annular band surface 97
8, the right end (front portion) is open, and a step is formed on the seal holding 93 side. These surfaces or steps are formed in a horizontally long flat ring band shape (flat oval shape) in side view. Conventionally, the gland packing flatly suppresses the gate plate 2 with the same pressure. However, according to the present embodiment, in the contact between the gate plate 2 and the gland packing 92, the gland packing is set so that the sealing pressure can be roughened. It is considered that a strong contact point and a weak contact point can be delicately formed, thereby enhancing the sealing effect. Thereby, when the gate plate 2 is opened and closed,
In particular, when opening the opening 3, the gland packing 92 wipes off the powder adhering to the surface of the gate plate 2, thereby leaking the powder from the movement path of the powder to the outside of the movement path, that is, the powder on the gate plate 2. The intrusion into the storage case 7 with the body adhered thereto can prevent inconveniences such as internal contamination and equipment failure. Therefore, the sealing property can be improved by the sealing member 9. Further, a communication hole 99 communicating with the seal housing 91 indicated by a dotted line in FIG. 6A is formed, and the exhaust gas supplied from an air purge 119 described later is supplied into the seal housing 91 so that the inside thereof has a positive pressure. It can also enhance the sealing effect.

(Explanation of the sealing member 10)
A seal member 10 having a rectangular frame shape in a plan view is provided near the periphery of the gate member 2 so as to seal a gap between the frame body 4 and the gate plate 2 existing when the opening 3 is closed.
The seal member 10 is a labyrinth packing, and has a rectangular frame-shaped single or plural concave grooves 10a continuously provided on the lower surface (bottom surface). When the powder is clogged in the concave groove 10a, a material seal in which the powder itself functions as a seal is formed. Thus, when the opening 3 is closed by the gate plate 2, the powder or air deposited above the gate plate 2 is separated from the edges of the gate plate 2 (three edges excluding the storage case 7 side). Leakage of the powder and air in the movement path of the powder can be prevented by preventing leakage downward from the gap between the inside of the frame 4 and the powder. Therefore, by using the labyrinth packing as the seal member 10, the sealing performance can be improved and the sliding resistance can be reduced. Further, since the number of the holding screws 94 is small due to the labyrinth effect, the number of parts can be reduced and the mounting operation can be facilitated.

(Description of Air Equipment Unit 11) The air equipment unit 11 is fixed to the front frame member 42 with a bracket 110 or the like as shown in FIG. 3, and has an air inlet 111, supply ports 112 and 113, a discharge port 114, And an electromagnetic valve unit 116 provided with a supply port 11
2 and 113 are provided with speed controllers 117 and 118 (see FIG. 11) for adjusting the stroke speed of the air cylinders 5 and 6. One-touch joints 55 and 65 are provided at the air inlet 111 and the discharge ports 114 and 115, respectively.
Is attached. Further, air purges 119 and 120 (see FIG. 11) and an air primary piping port 121 (see FIGS. 10 and 11) are arranged on the front frame member 42, respectively.

(Description of Electric Equipment Unit 13) The electric equipment unit 13 is fixed to the front frame member 42 by a bracket 130 or the like as shown in FIG. As shown in FIG. 11, the member 42 includes an electrical primary wiring port 134, a sensor lead 135, and the like. Connection terminal box 133
A control device 136 for controlling the inside is provided therein, for controlling the driving of the cylinders 5, 6, and the like.

(Operation and Effect of Gate Valve 1) When power and air are supplied from a power source and an air source (such as a compressor) to the air equipment unit 11 and the electric equipment unit 13, the driving process is started. First, in the initial state, it is assumed that the air cylinders 5 and 6 are contracted, the opening 3 is closed, and the powder is deposited above the gate plate 2. When the gate opening signal is supplied from the control device 136 to the electromagnetic valve unit 116, it is supplied from the air primary piping port 121 to the air introduction port 111, and the supply ports 112, 1
Air is supplied from 13 into the cylinder tubes 51 and 61 of the air cylinders 5 and 6, and air is discharged from the discharge ports 114 and 115, respectively. Then, the piston rods 50, 60 move forward to extend and push out the gate plate 2, and the sensor switch 6
3 is turned on, it is sent to the control device 136 via the sensor lead 135, and the air supply stop signal is sent out to the solenoid valve unit 116, and the piston rod 50, at the position shown by the two-dot chain line at the right end in FIG. 60 stops. Then, the opening 3 is opened, and the powder passes through the opening 3 and falls from above to below.

When the transportation of the powder is completed, a gate closing signal is supplied from the control device 136 to the solenoid valve unit 116, the connection state of the solenoid valve unit 116 is switched, and the air primary pipe port 121 to the air inlet port 111 are switched. Supplied to
Air is supplied into the cylinder tubes 51 and 61 of the air cylinders 5 and 6 from the supply ports 112 and 113, respectively, and air is discharged from the discharge ports 114 and 115, respectively. Then, when the piston rods 50 and 60 move rearward and contract, and when the sensor switch 62 is turned on, the control device 1 is connected via the sensor lead 135.
36, the air supply stop signal is sent to the solenoid valve unit 11
6, and the piston rods 50, 60 stop at the position shown by the solid line in FIG. Then, the opening 3 is closed to prevent the passage of the powder, and the powder is deposited on the gate plate 2.

Since the guide rails 14 and 15 are coated with a polymer resin film and the seal member 10 is a labyrinth packing, the gate plate 2 is sealed when the gate plate 2 moves in the frame 4. Guided while being sandwiched between the member 10 and the guide rails 14 and 15, the resistance of the sliding surface is reduced, the wear is reduced, the durability is improved, and the sealing performance is further improved. Then, since the gate plate 2 is sealed by the seal member 9, the sealing performance is greatly improved.

In the gate valve 1, the gate plate 2 reciprocates in the housing case 7 and the frame 4 with the reciprocation of the air cylinders 5, 6, and opens and closes the opening 3. The rod 8 reciprocates only in the storage case 7. In addition, since the opening portions 3 are closed by pulling the gate plate 2 by the contraction of the air cylinders 5 and 6, and the opening portions 3 are opened by pushing the gate plates by the extension of the air cylinders 5 and 6, the size is reduced. It can contribute to cost reduction.

Further, the exhaust of the air cylinders 5 and 6 is supplied to the pipes 17 and 18 from the air purges 119 and 120, respectively, and the air is ejected from the slits 21 and 22 to effectively exhaust the air of the air cylinders 5 and 6. HACCP can be realized by preventing contamination caused by powders of foods, medicines, and the like deposited on bolts and the like inside.

In the type shown in FIG. 4, guide rails 14 and 15 are provided.
Therefore, the gate plate 2 is supported by the projection 49 only when the opening 3 is closed by the gate plate 2. Since the guide rails 14 and 15 become unnecessary, the structure is simplified and the cost is reduced.

Next, a gate valve 201 according to a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the air equipment unit 1
1 and the electric equipment unit 13 are accommodated. In the second embodiment, the accommodation case 7 is a gate plate accommodation case 207A, and the air equipment unit 211 and the electric equipment unit 213 are accommodated in the accommodation case 207B. The housing case 207B is fixed to the rear frame member 243 side so as to be exposed to the outside.
206 is to be fixed. Thus, the same operation and effect as those of the first embodiment can be obtained, but there is an advantage that inspection and maintenance of the air equipment unit 211 and the electric equipment unit 213 are facilitated. The present embodiment is substantially the same as the first embodiment except for the above-described configuration, and thus the common elements are in the 200s, and the description is incorporated.

Examples of application of the gate valves 1 and 201 include a dust collector, a discharge under a cyclone, a discharge under a conveyor, a tank, a silo, a check bin, a discharge of a mixer, a gate for a scale input, and a screw feeder. For discharge. Further, examples of the driving form include an air cylinder type, a manual type, and a motor type. Examples of the shape include a round shape and a square shape.

The present invention is not limited to the above-described embodiments or the embodiments, but can be modified without departing from the technical idea of the present invention. Modifications, equivalents, and the like are also included in the technical scope of the present invention. As an example, in the above description, the air cylinders 5 and 6 using air pressure were used to drive the gate plate 2, but in addition to the air cylinders 5 and 6, cylinders and motors using hydraulic pressure, water pressure, etc. Is considered,
In addition, a manual device that can mechanically move the bar left and right may be used. However, it is preferable to use the air cylinders 5 and 6 because the control is simpler.

[0030]

According to the first to third aspects of the present invention, there is provided a frame having an opening, an actuator disposed in the frame, a storage case connected to the frame, and the actuator. A sliding motion is performed by the gate plate incorporated in the frame, a guide rail that guides the gate plate in a lateral direction, and air is supplied to the guide rail, and a slit is formed in the guide rail. Since air is blown out, internal contamination can be effectively prevented.

According to a second aspect of the present invention, the guide rail is formed by fitting a guide plate from above into a pipe having an upper surface opening, and the slit is formed in the pipe. Easy to introduce.

According to a third aspect of the present invention, since the actuator is an air cylinder and the exhaust of the air cylinder is introduced into the pipe, the exhaust of the air cylinder is effectively used to supply air to the guide rail. The mechanism can be simplified.

[Brief description of the drawings]

FIG. 1 is a plan view showing a slide gate valve for powder according to a first embodiment of the present invention.

FIGS. 2A and 2B are a front view and a bottom view, respectively.

FIG. 3 is a plan view showing the internal structure.

FIG. 4A is a partial side view of the modification, and FIG. 4B is a side sectional view of the modification.

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

6A is a partially enlarged sectional view of FIG. 5, and FIG. 6B is a sectional view of a seal housing.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 3;

8 is a sectional view taken along the line VIII-VIII of FIG.

FIG. 9 is a right side view of a connecting rod and a gate plate of the sliding gate valve for powder of the first embodiment.

FIG. 10 is a front view showing the internal structure.

FIG. 11 is a sectional view taken along the line XI-XI of FIG. 3;

FIG. 12 is a plan view showing the internal structure of a slide gate valve for powder according to a second embodiment of the present invention.

FIG. 13 is a front view showing the internal structure.

14 is a sectional view taken along the line XIV-XIV in FIG.

FIG. 15 is a plan view showing the internal structure of a conventional slide gate valve for a granular material.

FIG. 16 is a front view showing the internal structure.

[Explanation of symbols]

1. Slide gate valve for powder 2. Gate plate 3,
... opening, 4 ... case, 40, 41 ... side frame member, 42 ...
Front frame member, 43: rear frame member, 46: guide hole, 4
7, 48 connecting hole, 9 sealing member, 10 sealing member, 14, 15 guide rail, 16 opening groove, 17,
18 ... pipe, 21,22 ... slit

Continued on the front page F term (reference) 3H053 AA25 AA31 BA26 BA38 BB22 BD05 DA06 3H056 AA05 BB41 CC02 CD04 GG01 GG16 GG17

Claims (3)

[Claims] 1. A frame having an opening, an actuator disposed in the frame, a storage case connected to the frame, and a sliding movement performed by the actuator, the opening being formed by the actuator. A gate plate that opens and closes; a guide rail that supports the gate plate from below and guides the slide plate in the direction of the sliding motion; air is supplied to the guide rail, and a slit is formed in the guide rail to blow out air. Sliding gate valve for powder and granular material, characterized in that: 2. The powder according to claim 1, wherein the guide rail is formed by fitting a guide plate from above into a pipe having an upper surface opening, and wherein the slit is formed in the pipe. Sliding gate valve for granules. 3. The sliding gate valve for a granular material according to claim 2, wherein the actuator is an air cylinder, and the exhaust of the air cylinder is introduced into the pipe.