Slide gate

Abstract

To provide a technique capable of effectively suppressing biting in a slide gate arranged on a transport path of particulate matters.SOLUTION: A slide gate 1 has: a plate-like valve element 4 slidable in a sliding direction between an open position P1 and a closed position P2; an upper plate 2 disposed above the plate-like valve element 4; and a lower plate 3 disposed below the plate-like valve element 4. The closed position P2 is disposed on one side of the open position P1 in the sliding direction. The plate-like valve body 4 has: a flat valve body 41; a through hole 40 penetrating vertically; and a protrusion 41 extending from one side of the through hole 40 in the sliding direction to the other side within the through hole 40 in the sliding direction. The upper plate 2 has an upper transport hole 20. A lower plate 3 has a lower transport hole 30. In the open position P1, the upper transport hole 20, the passage hole 40, and the lower transport hole 30 are vertically overlapped. In the closed position P2, the upper transport hole 20 and the lower transport hole 30 are closed by the valve body 41.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a slide gate that is arranged on a transport path for powder and granular material. [Background technology]

[0002] Conventionally, a slide gate may be used on a transport route to control the transport of powder or granular material. A conventional slide gate is described, for example, in Patent Document 1. Patent Document 1 discloses a slide gate that opens and closes a transport route by sliding a valve body, which is an on-off valve, relative to a slide base (housing). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-107024 Summary of the Invention [Problem to be solved by the invention]

[0004] While slide gates can control transport with a simple configuration, there are cases where powder or granular material gets caught between the sliding valve body and a fixed member, restricting the movement of the valve body. In Patent Document 1, a recess called a notch is provided at the end of the valve body's passage hole to prevent the powder or granular material from getting caught. However, depending on the type of powder or granular material, this configuration may not be able to sufficiently prevent the powder or granular material from getting caught.

[0005] An object of the present invention is to provide a technology that can effectively prevent powder and granular material from getting caught in a slide gate that is arranged on a powder and granular material transport path. [Means for solving the problem]

[0006] In order to solve the above problems, a first invention of the present application is a slide gate interposed in a transport path for transporting powder or granular material from above to below, the slide gate comprising: a plate-shaped valve body that is slidable in a horizontal slide direction between an open position and a closed position; an upper plate disposed above the plate-shaped valve body; and a lower plate disposed below the plate-shaped valve body, wherein the closed position of the plate-shaped valve body is disposed on one side in the slide direction relative to the open position, and the plate-shaped valve body comprises a flat plate-shaped valve body main body and a passage hole that passes through the valve body main body in the vertical direction. , and a protrusion extending from one side of the through hole in the sliding direction into the through hole toward the other side in the sliding direction, the upper plate has an upper transport hole that penetrates vertically, the lower plate has a lower transport hole that penetrates vertically and overlaps with the upper transport hole in the vertical direction, when the plate-shaped valve body is positioned in the open position, the upper transport hole, the through hole and the lower transport hole overlap in the vertical direction, and when the plate-shaped valve body is positioned in the closed position, the upper transport hole and the lower transport hole are blocked by the valve body main body.

[0007] A second invention of the present application is a slide gate according to the first invention, wherein the plate-shaped valve body further has an upper convex portion that protrudes upward from the upper surface of the valve body main body and extends from one end of the protrusion in the sliding direction toward the one side in the sliding direction, the upper end of the protrusion is positioned higher than the valve body main body and has a height equal to or lower than the upper end of the upper convex portion, the upper plate further has an upper groove portion that is recessed upward from the lower surface of the upper plate and extends from the upper transport hole to the one side in the sliding direction, and in the closed position, the upper convex portion and the upper portion of the protrusion are accommodated inside the upper groove portion.

[0008] A third invention of the present application is a slide gate according to the first or second invention, wherein the plate-shaped valve body further has a lower convex portion that protrudes downward from the underside of the valve body main body and extends from one end of the protrusion in the sliding direction toward the one side in the sliding direction, the lower end of the protrusion is positioned lower than the valve body main body and has a height equal to or higher than the lower end of the lower convex portion, the lower plate further has a lower groove portion that is recessed downward from the upper surface of the lower plate and extends from the lower transport hole toward the one side in the sliding direction, and in the closed position, the lower convex portion and the lower part of the protrusion are accommodated inside the lower groove portion.

[0009] A fourth aspect of the present invention is the slide gate of any one of the first to third aspects, wherein the upper surface of the protrusion is an inclined surface.

[0010] The fifth invention of the present application is a slide gate according to any one of the first to third inventions, wherein the upper surface of the protrusion has a slope that slopes downward toward both ends in the width direction perpendicular to the sliding direction.

[0011] The sixth invention of the present application is a slide gate according to any one of the first to fifth inventions, further comprising a sample collection section below the lower plate for collecting the powder or granular material, the lower plate further comprising a sampling hole penetrating vertically, and when the plate-shaped valve body is positioned in the closed position, the upper transport hole and the lower transport hole are blocked by the valve body main body, and the passage hole and the sampling hole overlap vertically, and the sample collection section collects the powder or granular material falling downward from the sampling hole. [Effects of the Invention]

[0012] According to the first to sixth aspects of the present invention, the protrusions divide the powder or granular material that enters between the upper and lower plates through the passage holes in the width direction, thereby effectively preventing the powder or granular material from getting caught in the slide gate. [Brief explanation of the drawings]

[0013] [Figure 1]FIG. 2 is a front view showing the state of the slide gate according to the first embodiment when in use. [Figure 2] FIG. 2 is a perspective view showing the state of the slide gate according to the first embodiment when in use. [Figure 3] 1A and 1B are top views of the slide gate according to the first embodiment in an open position and a closed position. [Figure 4] FIG. 2 is an exploded top view of a portion of the slide gate according to the first embodiment. [Figure 5] 2A and 2B are cross-sectional views taken along line AA of the slide gate according to the first embodiment in an open position and a closed position. [Figure 6] 1 is a BB cross-sectional view of the slide gate in the open position according to the first embodiment. FIG. [Figure 7] FIG. 10 is a vertical cross-sectional view of a slide gate according to a modified example in an open position. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0015] 1. First Embodiment FIG. 1 is a front view showing a state in which a slide gate 1 according to one embodiment of the present invention is in use. FIG. 2 is a perspective view showing a state in which the slide gate 1 is in use. FIGS. 1 and 2 show the slide gate 1, a powder or granular material supply source 10, and a supply destination pipe 9. In FIGS. 1 and 2, a plate-shaped valve element 4, which will be described later, is positioned in a closed position. FIG. 3 is a top view of the slide gate 1 in (a) the open position and (b) the closed position. FIG. 4 is an exploded top view of the slide gate 1. FIG. 5 is a cross-sectional view taken along line AA of the slide gate 1 in (a) the open position and (b) the closed position. FIG. 6 is a cross-sectional view taken along line BB of the slide gate 1 in the open position. Note that in FIGS. 4 to 6, screws and screw holes for screw fastening are not shown.

[0016] The slide gate 1 is a device that is placed on a powder / granular material transport path and controls the transport of the powder / granular material. The slide gate 1 also serves as a sampling device that collects samples of the powder / granular material passing through the transport path. In this embodiment, the powder / granular material to be transported is, for example, resin pellets, which are a plastic molding material. However, the powder / granular material to be transported may be other powder / granular materials.

[0017] As shown in Fig. 1, a slide gate 1 of this embodiment controls the opening and closing of powder or granular material supplied from a powder or granular material supply source 10 to be transported by gravity to a destination pipe 9. The powder or granular material supply source 10 is, for example, a drying treatment device that heats and dries the powder or granular material.

[0018] As shown in Figures 1 and 2, the sliding gate 1 has an upper plate 2, a lower plate 3, a plate-shaped valve body 4, and a sample collection section 5. The sliding gate 1 controls the opening and closing of the transportation of powder or granular material supplied onto an upper transport hole 20 provided in the upper plate 2 by gravity dropping to a lower transport hole 30 (see Figure 5) provided in the lower plate 3. The upper plate 2 and the lower plate 3 are fixed to the transportation path. The plate-shaped valve body 4 is slidable in a horizontal sliding direction between an open position P1 and a closed position P2 between the upper plate 2 and the lower plate 3. Here, the closed position P2 is a position on one side of the open position P1 in the sliding direction. The open position P1 is a position on the other side of the closed position P2 in the sliding direction.

[0019] 1 to 5, the upper plate 2 has a first upper plate 21, a second upper plate 22, and a lower plate 23. The first upper plate 21 and the second upper plate 22 are arranged along the upper surface of the lower plate 23. The upper plate 2 is fixed to the upstream transport path.

[0020] In this embodiment, the powder or granular material supply source 10, which is the upstream transport path, is a drying treatment device. As shown in Fig. 1, the powder or granular material supply source 10 has a powder or granular material discharge port (not shown) located at the lower end, a hopper 11 whose diameter decreases toward the powder or granular material discharge port, and a flange 12 that extends horizontally from the powder or granular material discharge port at the lower end of the hopper 11. An upper plate 2 is fixed to the flange 12.

[0021] The first upper top plate 21 has a first upper transport hole 201 that penetrates vertically. The lower top plate 23 has a second upper transport hole 202 that penetrates vertically. The first upper transport hole 201 and the second upper transport hole 202 overlap in the vertical direction to form an upper transport hole 20 that penetrates vertically through the top plate 2.

[0022] The lower top plate 23 has a first through hole 230 extending from the second upper transport hole 202 to one side in the sliding direction. The first through hole 230 reaches from the end of the second upper transport hole 202 on one side in the sliding direction to the end of the lower top plate 23 on one side in the sliding direction. The first upper top plate 21 and the second upper top plate 22 cover the upper part of the first through hole 230. As a result, the first through hole 230 is recessed upward from the lower surface of the top plate 2, and functions as an upper groove portion 200 extending from the upper transport hole 20 to one side in the sliding direction.

[0023] In this embodiment, the first upper plate 21, the second upper plate 22, and the lower upper plate 23 are each separate members, but the present invention is not limited to this. The first upper plate 21, the second upper plate 22, and the lower upper plate 23 may all be a single member. Alternatively, the first upper plate 21 and the second upper plate 22 may be a single member, and only the lower upper plate 23 may be a separate member. Incidentally, forming the lower upper plate 23 as a separate member has the advantage of making it easier to form the upper groove portion 200.

[0024] The lower plate 3 has an upper lower plate 31, a first lower lower plate 32, and a second lower lower plate 33. The first lower lower plate 32 and the second lower lower plate 33 are arranged along the lower surface of the upper lower plate 31. The lower plate 3 is fixed to the downstream transport path. In this embodiment, the lower plate 3 is fixed to the supply destination pipe 9, which is the downstream transport path. In this case, the lower transport holes 30 provided in the lower plate 3 are connected to the supply destination pipe 9.

[0025] The upper lower plate 31 has a first lower transport hole 301 that penetrates vertically. The first lower lower plate 32 has a second lower transport hole 302 that penetrates vertically. The first lower transport hole 301 and the second lower transport hole 302 overlap in the vertical direction to form a lower transport hole 30 that penetrates vertically through the lower plate 3.

[0026] The upper lower plate 31 has a first sampling hole 801 that penetrates vertically. The second lower lower plate 33 has a second sampling hole 802 that penetrates vertically. The first sampling hole 801 and the second sampling hole 802 overlap in the vertical direction to form a sampling hole 80 that penetrates vertically through the lower plate 3. The sampling hole 80 is connected to the collection port of the sample collector 5.

[0027] The upper lower plate 31 has a second through hole 310 extending from the first lower transport hole 301 to one side in the sliding direction. The second through hole 310 continues from the end of the first lower transport hole 301 on one side in the sliding direction to the end of the first sampling hole 801 on the other side in the sliding direction, and further extends from the end of the first sampling hole 801 on one side in the sliding direction to the end of the upper lower plate 31 on one side in the sliding direction. The first lower lower plate 32 and the second lower lower plate 33 cover the lower part of the second through hole 310. As a result, the second through hole 310 is recessed downward from the upper surface of the lower plate 3 and functions as a lower groove portion 300 extending from the lower transport hole 30 to one side in the sliding direction.

[0028] In this embodiment, the upper lower plate 31, the first lower lower plate 32, and the second lower lower plate 33 are each separate members, but the present invention is not limited to this. The upper lower plate 31, the first lower lower plate 32, and the second lower lower plate 33 may all be a single member. Alternatively, the first lower lower plate 32 and the second lower lower plate 33 may be a single member, with only the upper lower plate 31 being a separate member. Making the upper lower plate 31 a separate member has the advantage of making it easier to form the lower groove portion 300.

[0029] The plate-shaped valve element 4 is slidably attached to the upper plate 2 and the lower plate 3. The plate-shaped valve element 4 is slidable in a horizontal sliding direction between an open position P1 shown in Figures 3(a) and 5(a) and a closed position P2 shown in Figures 3(b) and 5(b). The plate-shaped valve element 4 has a valve element main body 41, a protrusion 42, an upper convex portion 43, a lower convex portion 44, and a passage hole 40.

[0030] The valve body 41 is flat and has a through hole 40 that passes through the valve body 41 in the vertical direction.

[0031] The protrusion 42 protrudes from the edge of the passing hole 40 toward the inside of the passing hole 40. The protrusion 42 extends from an end of the passing hole 40 on one side in the sliding direction toward the other side in the sliding direction inside the passing hole 40. The tip of the protrusion 42 is disposed at a distance from the edge of the passing hole 40 on the opposite side (the other side in the sliding direction).

[0032] The upper convex portion 43 is a portion that protrudes upward from the upper surface of the valve body main body 41. The upper convex portion 43 extends toward one side in the sliding direction from the end portion on one side in the sliding direction, which is the base end of the protrusion 42. The vertical thickness of the upper convex portion 43 is approximately equal to the vertical thickness of the lower upper plate 23. In other words, the vertical thickness of the upper convex portion 43 is approximately equal to the vertical depth of the upper groove portion 200.

[0033] The lower convex portion 44 is a portion that protrudes downward from the lower surface of the valve body main body 41. The lower convex portion 44 extends toward one side in the sliding direction from the end portion on one side in the sliding direction, which is the base end of the protrusion 42. The vertical thickness of the lower convex portion 44 is approximately equal to the vertical thickness of the upper lower plate 31. In other words, the vertical thickness of the lower convex portion 44 is approximately equal to the vertical depth of the lower groove portion 300.

[0034] FIG. 6 is a vertical cross-sectional view of the sliding gate 1 in the open position P1. As shown in FIG. 6, the upper surface of the protrusion 42 is inclined. Specifically, the upper surface of the protrusion 42 has two slopes that slope downward from the center toward both ends in the width direction perpendicular to the sliding direction, with the center being located at the top. That is, the upper surface of the protrusion 42 has a mountain shape when viewed from the sliding direction. Furthermore, the lower surface of the protrusion 42 has a mountain shape that protrudes downward, which is upside down from the upper surface of the protrusion 42. In this way, because the upper surface of the protrusion 42 is inclined, powder or granular material that sits on the protrusion 42 is more likely to fall off without remaining on the protrusion 42.

[0035] The upper end of the protrusion 42 is positioned above the upper surface of the valve body main body 41. Furthermore, the widthwise center portion of the upper end of the protrusion 42 is positioned at the same vertical position as the upper surface of the upper convex portion 43, or is positioned below the upper surface of the upper convex portion 43. In other words, the upper end of the protrusion 42 has a height equal to or lower than the upper end of the upper convex portion 43.

[0036] The lower end of the protrusion 42 is positioned lower than the lower surface of the valve body main body 41. Furthermore, the widthwise center portion of the lower end of the protrusion 42 is positioned at the same vertical position as the lower surface of the lower convex portion 44, or is positioned higher than the lower surface of the lower convex portion 44. In other words, the lower end of the protrusion 42 has a height equal to or higher than the lower end of the lower convex portion 44.

[0037] As a result, the protrusion 42 can be accommodated inside the space surrounded by the upper groove portion 200 and the lower groove portion 300 on one side in the sliding direction from the open position P1.

[0038] The sample collection section 5 has a funnel-shaped section 51 , a collection bottle attachment section 52 , and a collection bottle 53 .

[0039] The funnel-shaped portion 51 is a funnel-shaped portion whose diameter decreases from top to bottom. The upper opening of the funnel-shaped portion 51 is the collection port of the sample collection unit 5 and is connected to the sampling hole 80 in the lower plate 3. The collection bottle attachment portion 52 fixes the collection bottle 53 while communicating the upper opening of the collection bottle 53 with the lower opening of the funnel-shaped portion 51. The collection bottle 53 in this embodiment is a transparent collection container. The collection bottle 53 is made of glass.

[0040] As shown in Figures 1 and 2, in this embodiment, the supply destination pipe 9 on the downstream side of the transport path has a vertical pipe 91, an inclined pipe 92, and an airflow supply pipe 93. The vertical pipe 91 is a pipe extending in the vertical direction. The upper end of the vertical pipe 91 is connected to the lower transport hole 30 of the lower plate 3. The inclined pipe 92 is arranged at an angle relative to the vertical and horizontal directions. The lower end of the inclined pipe 92 is closed. The upper end of the inclined pipe 92 is connected to the transport destination. The lower end of the vertical pipe 91 is arranged slightly above the lower end of the inclined pipe 92. The airflow supply pipe 93 is arranged between the lower end of the inclined pipe 92 and the connection with the vertical pipe 91. The inclined pipe 92 is connected to airflow generating means such as a blower.

[0041] In this configuration, when supplying powder or granular material from a powder or granular material supply source above the slide gate 1 to a powder or granular material destination through the destination pipe 9, the slide gate 1 is first opened. That is, the plate-shaped valve body 4 is placed in the open position P1, and the upper transport hole 20 of the upper plate 2, the passage hole 40 of the plate-shaped valve body 4, and the lower transport hole 30 of the lower plate 3 are aligned in the vertical direction, as shown in Figures 3(a) and 5(a). This allows the upper transport hole 20 and the lower transport hole 30 to communicate with each other, and the powder or granular material supplied to the upper transport hole 20 from the upstream side of the upper transport path flows into the vertical pipe 91.

[0042] As a result, the powder or granular material is filled into the vertical pipe 91 and the lower part of the inclined pipe 92 (from near the connection with the vertical pipe 91 to the lower end of the inclined pipe 92). At this time, the upper transport hole 20, the passage hole 40, and the lower transport hole 30 are also filled with the powder or granular material.

[0043] With the powder and granular material filled in the vertical pipe 91 and the lower part of the inclined pipe 92, air is sucked in from one end of the inclined pipe 92 by the air flow generating means, and air flow is supplied from the air flow supply pipe 93. This generates an air flow within the inclined pipe 92 from near the lower end of the inclined pipe 92 toward the powder and granular material destination. This causes the powder and granular material accumulated in the lower part of the inclined pipe 92 to be sent to the powder and granular material destination. Thereafter, as the powder and granular material at the lower part of the inclined pipe 92 decreases due to transport, the powder and granular material is continuously supplied by gravity from the powder and granular material supply source above the slide gate 1 through the upper transport hole 20, the passage hole 40, the lower transport hole 30, and the vertical pipe 91 to the lower part of the inclined pipe 92. The continuously supplied powder and granular material is then sent one after another to the powder and granular material destination by the air flow supplied from the air flow supply pipe 93.

[0044] When the supply of airflow from the airflow supply pipe 93 stops, the upper transport hole 20, the passage hole 40, the lower transport hole 30, the vertical pipe 91, and the lower part of the inclined pipe 92 are filled with powder and granular material again.

[0045] In this state, when the plate-shaped valve body 4 moves from the open position P1 to one side in the sliding direction, the portion of the edge of the through hole 40 of the plate-shaped valve body 4 on the other side in the sliding direction pushes out the powder or granular material filled in the through hole 40 to one side in the sliding direction. As a result, the powder or granular material filled in the through hole 40 moves together with the plate-shaped valve body 4 to one side in the sliding direction.

[0046] Then, when the passage hole 40 of the plate-shaped valve body 4 is positioned so as to overlap with the sampling hole 80 of the lower plate 3, the powder and granular material filled in the passage hole 40 falls one after another into the sampling hole 80 and is collected inside the collection bottle 53 of the sample collection section 5.

[0047] When the plate-shaped valve body 4 is disposed in the closed position P2, the lower part of the upper transport hole 20 and the upper part of the lower transport hole 30 are covered by the valve body main body 41. This blocks communication between the upper transport hole 20 and the lower transport hole 30. As a result, the supply of powder and granular material from the powder and granular material supply source above the slide gate 1 to the supply destination pipe 9 is stopped.

[0048] During the opening and closing operation of such a slide gate 1, when the plate-shaped valve body 4 moves from the open position P1 to one side in the sliding direction, some of the powder and granular material filled in the upper transport hole 20, the passage hole 40 and the lower transport hole 30 may become caught between the upper plate 2 and the plate-shaped valve body 4, and between the plate-shaped valve body 4 and the lower plate 3, possibly hindering the movement of the plate-shaped valve body 4.

[0049] In this slide gate 1, at the timing when jamming is likely to occur when the plate-shaped valve body 4 starts to move from the open position P1 to one side in the sliding direction, a protrusion 42 is provided at the center in the width direction of the passage hole 40, which enters between the upper plate 2 and the lower plate 3. This divides the powder and granular material that enters between the upper plate 2 and the lower plate 3 inside the passage hole 40 in the width direction, thereby suppressing jamming.

[0050] Furthermore, in this slide gate 1, spaces are formed above and below the widthwise center of the movement path of the passage hole 40 by the upper groove portion 200 and the lower groove portion 300. When the other side of the passage hole 40 in the sliding direction relative to the protrusion 42 enters between the upper plate 2 and the lower plate 3, some of the powder and granular material attempting to enter between the upper plate 2 and the plate-like valve body 4 and between the plate-like valve body 4 and the lower plate 3 can escape into the spaces within the upper groove portion 200 and the lower groove portion 300. This further prevents jamming.

[0051] In this way, the slide gate 1 can effectively prevent jamming compared to conventional slide gates. Furthermore, the slide gate 1 is small, only the thickness of a few plate-like members, and does not have a complicated mechanism, making it easy to insert into the powder / granular material transport path. As a sampling device, the slide gate 1 can obtain samples with an extremely simple configuration.

[0052] <2. Modifications> Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

[0053] 7 is a vertical cross-sectional view of a slide gate 1A according to one modified example in an open position. This slide gate 1A differs from the slide gate 1 of the above embodiment only in the shape of the protrusion 42A. In this slide gate 1A, the protrusion 42A is divided into an upper protrusion 421A that forms the upper surface of the protrusion 42A and a lower protrusion 422A that forms the lower surface of the protrusion 42A. The upper protrusion 421A is formed, for example, by extending the upper convex portion 43. The lower protrusion 422A is formed, for example, by extending the lower convex portion 44.

[0054] In this way, by dividing the protrusion 42 into upper and lower parts and providing a space between them, an additional space for the powder or granules to escape is provided at the tip of the protrusion 42. As a result, it is possible to further prevent the powder or granules from getting caught.

[0055] The protrusion may be configured by only the upper protrusion 421A in the example of Fig. 7. In other words, the protrusion may be disposed only above the valve body main body 41.

[0056] In the above embodiment, the upper surface of the protrusion 42 is inclined, but the shape of the upper surface of the protrusion is not limited to this. As shown in the example of Fig. 7, the upper surface of the protrusion 42 may be flat, or may be curved and convex upward.

[0057] In the above embodiment, the length of the protrusion 42 is equal to or less than half the diameter of the passage hole 40. However, the length of the protrusion 42 may be equal to or more than half the diameter of the passage hole 40. However, the protrusion 42 is not disposed over the entire area of ​​the passage hole 40 in the sliding direction.

[0058] In the above embodiment, the collection bottle 53 is made of transparent glass, but this is not a limitation of the present invention. The collection bottle 53 may be opaque or made of other materials such as resin.

[0059] In the above embodiment, the slide gate 1 is disposed on a transport path for transporting powder or granular material supplied from a drying treatment device to a destination. However, the slide gate of the present invention may be used in any facility having a powder or granular material transport path, in addition to a drying treatment device. For example, it may be used as a discharge point from a container that stores powder or granular material, a pipeline that serves as a powder or granular material transport path, or a supply section to a weighing device.

[0060] The detailed shapes of the slide gate or sampling device may differ from those shown in the drawings of the present application. Furthermore, the elements appearing in the above-described embodiments and modifications may be combined as appropriate within the scope of not causing any contradiction. [Explanation of symbols]

[0061] 1: Slide gate 2: Upper plate 3: Lower plate 4: Plate-shaped valve body 5: Sample collection section 9: Supply piping 10: Powder supply source 20: Upper transport hole 30:Lower transport hole 40: Passing hole 41: Valve body 42: Protrusion 43: Upper convex part 44: Lower convex part 53: Collection bottle 80: Sampling hole 200: Upper groove 300: Lower gutter P1: Open position P2: Closed position

Claims

1. A slide gate inserted in a transport path for transporting powder and granular material from above to below, a plate-shaped valve element that is slidable in a horizontal direction between an open position and a closed position; an upper plate disposed above the plate-shaped valve body; a lower plate disposed below the plate-shaped valve body; and the closed position of the plate-shaped valve body is located on one side of the open position in the sliding direction, The plate-shaped valve body is a flat valve body; a passage hole that passes through the valve body in the vertical direction; a protrusion extending from one side of the passage hole in the sliding direction into the passage hole toward the other side in the sliding direction; and The upper plate has an upper transport hole that penetrates vertically, the lower plate has a lower transport hole that penetrates vertically and overlaps with the upper transport hole in the vertical direction; When the plate-shaped valve body is disposed in the open position, the upper transport hole, the passage hole, and the lower transport hole overlap in the vertical direction, When the plate-shaped valve body is placed in the closed position, the upper transport hole and the lower transport hole are blocked by the valve body main body.

2. The slide gate according to claim 1, The plate-shaped valve body is an upper convex portion that protrudes upward from the upper surface of the valve body and extends from an end portion of the protrusion on one side in the sliding direction toward the one side in the sliding direction; and an upper end of the protrusion is disposed above the valve body body and has a height equal to or lower than an upper end of the upper convex portion; The upper plate is an upper groove portion recessed upward from the lower surface of the upper plate and extending from the upper transport hole toward one side in the sliding direction; and In the closed position, the upper convex portion and the upper portion of the projection are housed within the upper groove portion.

3. The slide gate according to claim 2, The plate-shaped valve body is a lower convex portion that protrudes downward from the lower surface of the valve body and extends from an end portion of the protrusion on one side in the sliding direction toward the one side in the sliding direction; and a lower end of the protrusion is disposed below the valve body main body and has a height equal to or higher than a lower end of the lower convex portion; The lower plate is a lower groove portion recessed downward from the upper surface of the lower plate and extending from the lower transport hole toward one side in the sliding direction; and In the closed position, the lower convex portion and the lower portion of the projection are housed within the lower groove portion.

4. The slide gate according to any one of claims 1 to 3, The upper surface of the protrusion is a slope.

5. The slide gate according to any one of claims 1 to 3, A slide gate, wherein the upper surface of the protrusion has a slope that slopes downward toward both ends in a width direction perpendicular to the slide direction.

6. The slide gate according to any one of claims 1 to 3, a sample collection section below the lower plate for collecting the powder or granular material; and The lower plate further has a sampling hole penetrating vertically, When the plate-shaped valve body is placed in the closed position, the upper transport hole and the lower transport hole are blocked by the valve body main body, and the passage hole and the sampling hole overlap in the vertical direction, The sample collection section is a slide gate that collects the powder or granular material that falls downward from the sampling hole.

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