JP2000219322A - Particulate transport branch gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain occurrence of particulate leakage on a particulate transport branch gate. SOLUTION: This particulate transport branch gate 11 transports particulates flowing in the inside of a gate body 12 from a particulate inflow port 12a by making them flow out of the other particulate outflow port by blocking an optional particulate outflow port out of a plural number of the particulate outflow ports 12b by a branch valve, and technology to furnish an outflow port blocking means 14 to block the particulate outflow port by pushing the branch valve on the particulate outflow port by moving the branch valve to the optional particulate outflow port is adopted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder transport branch gate for selectively transferring powder to an arbitrary one of a plurality of transport pipes when transporting the powder.

[0002]

2. Description of the Related Art When transporting powder by air slide,
When the transport flow path of one powder is branched into a plurality of transport flow paths in the middle, an arbitrary transport flow path can be selected from the plurality of transport flow paths at the branch portion, and the powder flows through the transport flow path. A powder transport branch gate is provided.

A conventional powder transport branch gate is connected to, for example, a powder inflow port 2a connected to an upstream powder transport pipe 1 and two downstream powder transport pipes 3 as shown in FIG. A gate body 2 having two powder outlets 2b formed therein, and one of the two powder outlets 2b having a powder outlet 2b.
b is closed by the branch valve 4, and the powder P flowing into the gate main body 2 from the powder inlet 2a is transported by flowing out from the other powder outlet 2b. In this powder transport branch gate, a drive mechanism 5 that slides and moves the branch valve 4 on the inner peripheral wall of the gate body 2 is provided in the gate body 2. The powder transport branch gate employs an air slide that transports the powder P while increasing the fluidity of the powder P by aeration that sends air into the inside from the bottom.

[0004]

However, the conventional powder transport branch gate has the following problems. That is, when switching the powder outlet 2b, the branch valve 4 is moved in the circumferential direction around the center axis of the gate body 2 to the position of the powder outlet 2b to close the powder outlet 2b. The branch valve 4 is not in close contact with the powder outlet 2b in a tightly closed state, but is closed with a slight gap to move between the powder outlets 2b in a sliding state. Is set to For this reason, the sealing performance of the branch valve becomes incomplete, and there is a disadvantage that the powder leaks from the gap between the branch valve and the powder outlet.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a powder transport branch gate capable of suppressing occurrence of powder leakage.

[0006]

The present invention has the following features to attain the object mentioned above. That is, in the powder transport branch gate according to the first aspect, the powder flowing into the gate body from the powder inlet is blocked by closing any powder outlet of the plurality of powder outlets with the branch valve. An outlet closing means for moving the branch valve to the powder outlet and closing the branch valve by pressing the branch valve against the powder outlet. Equipped technology is adopted.

In this powder transport branch gate, there is provided an outlet closing means for moving the branch valve to the powder outlet and pressing the branch valve against the powder outlet to close the branch valve. Because there is no gap when pressed against the exit,
The occurrence of powder leakage can be prevented.

[0008] In the powder transport branch gate according to claim 2,
2. The powder transport branch gate according to claim 1, wherein the gate body is formed in a cylindrical shape, and the powder inlet and the powder outlet are formed on a peripheral wall of the gate body. 3. A rotating cam that is mounted so as to be able to advance and retreat in the radial direction, and is rotatably driven around a central axis of the gate body and is engaged with the branch valve to move the branch valve in the circumferential direction; An urging mechanism for urging the branch valve toward the rotary cam, and a stopper for stopping the branch valve at the position of the powder outlet, wherein the rotary cam is stopped by the stopper. In this case, a technique is employed in which the branch valve is rotated with respect to the branch valve to push the branch valve outward in the radial direction.

In this powder transport branch gate, the outlet closing means includes a rotary cam that is driven to rotate around the central axis of the gate body, engages the branch valve, and moves the branch valve in the circumferential direction, and a branch. Equipped with an urging mechanism for urging the valve toward the rotary cam and a stopper for stopping the branch valve at the position of the powder outlet, and the rotary cam rotates with respect to the branch valve when the branch valve is stopped by the stopper. The branch valve is set so as to be pushed radially outward, so that the branch valve is moved in the circumferential direction by the rotating cam while being pressed against the rotating cam by the urging mechanism, and the stopper is used to move the powder outlet through the stopper. Stopped in position. At this time, the branch valve is pushed radially outward by the rotation of the rotary cam and pressed against the powder outlet, and closes the powder outlet with no gap. Therefore, the movement of the branch valve and the pressing to the powder outlet are performed only by driving the rotary cam.

[0010] In the powder transport branch gate according to claim 3,
2. The powder transport branch gate according to claim 1, wherein the gate body is formed in a cylindrical shape, and the powder inlet and the powder outlet are formed on a peripheral wall of the gate body. 3. Attached so as to be able to advance and retreat in the radial direction, the outflow port closing means is fixed to a center axis of the gate main body, and a fixed cam that the branch valve contacts, and moves the branch valve in the circumferential direction with respect to the fixed cam. And a biasing mechanism for biasing the branch valve toward the rotating cam, wherein the fixed cam has a branch valve that moves when the branch valve moves to the powder outlet position. A technique that is set to be pushed outward in the radial direction is adopted.

In this powder transport branch gate, the outlet closing means is fixed to the center axis of the gate body and the fixed cam is in contact with the branch valve, and the rotary moving mechanism for moving the branch valve in the circumferential direction with respect to the fixed cam. And a biasing mechanism for biasing the branch valve toward the rotary cam, wherein the fixed cam is set such that the branch valve is pushed radially outward when the branch valve moves to the powder outlet position. Accordingly, the branch valve is moved around the fixed cam by the rotation moving mechanism to the position of the powder outlet while being pressed against the fixed cam by the urging mechanism. At this time, the branch valve in contact with the fixed cam moves along the shape of the fixed cam and is pushed outward in the radial direction,
It is pressed against the powder outlet. Therefore, the branch valve is moved and pressed against the powder outlet only by driving the branch valve by the rotary movement mechanism.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a powder transport branch gate according to the present invention will be described with reference to FIGS. In these figures, 11 is a powder transport branch gate, 12 is a gate body, 13 is a branch valve, and 14 is an outlet closing means.

The powder transport branch gate 11 of the present embodiment comprises:
As shown in FIGS. 1 and 2, a powder P transported by an air slide method is branched from an upstream powder transport pipe 1 by a pipe 2.
Transported to one of the two downstream powder transport pipes 3 and connected to the powder inlet 12a connected to the upstream powder transport pipe 1 and the two downstream powder transport pipes 3, respectively. A cylindrical gate body 12 having two powder outlets 12b on its peripheral wall, and a branch valve 13 disposed in the gate body 12 are connected to one of the two powder outlets 12b. Outlet closing means 14 which is moved to 12b to press and close the branch valve 13 against the powder outlet 12b.

The gate body 12 is provided with an air box 12c below which air is sent from an air supply means such as a pump (not shown), similarly to the upstream powder transport pipe 1 and the downstream powder transport pipe 3. And the air box portion 12c
A canvas 15 is provided at the border between the upper part and the upper part. That is, it is set so that air is sent from the air box portion 12c through the canvas 15 into the upper part of the gate body 12 to which the powder P is transported.
Air slide is possible even within 1.

The outlet closing means 14 is provided in the gate body 1.
2 is connected to a cam driving means (not shown) such as a motor or a manual lever and is rotatable on
A rotary cam 17 fixed to an end of the rotary shaft member 16 and driven to rotate and engage with the branch valve 13 to move the branch valve 13 in the circumferential direction; and attaching the branch valve 13 to the rotary cam 17 side. A biasing spring (biasing mechanism) 18 and a stopper 19 for stopping the branch valve 13 at the position of the powder outlet 12b are provided.

The branch valve 13 has a valve body 13a which is a plate-like body having an arc-shaped cross section and is set slightly larger than the powder outlet 12b. L-shaped valve support member 13b extending to the 16 side
The other end of the valve support member 13b has a rotating cam 1
7 is fixed to the valve-side cam portion 13c. The rotating cam 17 is formed in a horizontal sectional shape with one side protruding. The valve-side cam portion 13c is formed in a concave curved surface such that a tip end surface thereof is engaged with a protruding portion of the rotary cam 17.

Around the rotary cam 17, a branch valve 1 is provided.
3, a cylindrical member 20 rotatably attached to the cylindrical member 3 is provided. Note that a valve support member 13b is penetrated from a support hole 20a formed in the peripheral surface of the cylindrical member 20 so as to be able to advance and retreat in the radial direction of the gate body 12. Note that a seal member 20b is provided on the inner peripheral surface of the support hole 20a so that the valve support member 13b can slide.

Further, the spring 18 is mounted between the cylindrical member 20 and the valve-side cam portion 13c while being wound around the valve support member 13b, so that the valve-side cam portion 13c always comes into contact with the rotary cam 17. Is set. The stopper 19
Is a plate-like member fixed in a hanging state from the upper inner surface of the gate body 12, and the branch valve 1 is located at the position of the powder outlet 12b.
The valve support member 13b is provided so as to abut when the member 3 moves.

Next, a method of switching and closing the powder outlet by the powder transport branch gate of the present embodiment will be described.

First, in order to move the branch valve 13 to the powder outlet 12b in the open state, the rotating shaft member 16 and the rotating cam 17 are rotated by cam driving means (not shown). At this time, the valve-side cam portion 13 c is pressed against the rotating cam 17 by the urging force of the spring 18, and the rotation of the rotating cam 17 is transmitted to the branch valve 13. That is, the rotating cam 17
The branch valve 13 and the cylindrical member 20 rotate in the circumferential direction via the valve-side cam portion 13c in the engaged state.

When the branch valve 13 moves to the position of the powder outlet 12b to be closed, it contacts the stopper 19 and stops moving. At this time, the rotating cam 17
As shown in FIG. 3, by further rotating the cam driving means, the valve-side cam portion 13c slides on the rotary cam 17 and is pushed outward in the radial direction, and the valve body 13a is moved out of the powder outlet. 12b, and the powder outlet 12b is closed without a gap.

As described above, the rotary cam 17 is set so as to rotate with respect to the branch valve 13 and push the branch valve 13 outward in the radial direction when the branch valve 13 is stopped by the stopper 19. Since the valve body 13a is pressed against the powder outlet 12b and locked, the movement of the valve-side cam portion 13c also stops, and the rotary cam 17 does not rotate any more.

Therefore, the powder transport branch gate of the present embodiment is provided with the outlet closing means 14 for moving the branch valve 13 to the powder outlet 12b and pressing the branch valve 13 against the powder outlet 12b to close it. Since the branch valve 13 is pressed against the powder outlet 12b and no gap is formed, the occurrence of powder leakage can be prevented. Further, the movement of the branch valve 13 and the pressing to the powder outlet 12b can be performed only by driving the rotary cam 17.

Next, a second embodiment of the powder transport branch gate according to the present invention will be described with reference to FIG.

The difference between the second embodiment and the first embodiment is that, in the first embodiment, the outlet closing means 14 is
In the second embodiment, as shown in FIG. 4, the branch valve 13 is moved by using the outlet closing means 2.
5 includes a fixed cam 22 fixed to the center axis of the gate body 12 and contacting the branch valve 21;
The fixed cam 22 is set so that the branch valve 21 is pushed outward in the radial direction when the branch valve 21 moves to the position of the powder outlet 12b.

The fixed cam 22 is mounted on the gate body 1.
It is fixed to the lower end of a central shaft member 24 fixed in a hanging state from above on the central axis of the second. Then, the cylindrical member 20
Is disposed in the same manner as in the first embodiment so as to cover the fixed cam 22, but is rotatable about the central axis of the gate main body 12, and is connected to the cylindrical member 20 via gears and the like. It is rotationally driven together with the branch valve 21 by a rotation moving mechanism 23 such as a motor or a lever.

Further, the valve support member 13 of the branch valve 21
b has no valve-side cam portion at the other end as in the first embodiment, and the other end of the valve support member 13b directly abuts on the fixed cam 22. The fixed cam 22 is set such that the branch valve 21 is pushed outward in the radial direction when the branch valve 21 moves to the position of the powder outlet 12b. That is, the fixed cam 22 has a horizontal sectional shape protruding toward the two powder outlets 12b.

In the powder transport branch gate according to the present embodiment, the rotary valve 23 is moved around the fixed cam 22 by the rotary moving mechanism 23 to the position of the powder outlet 12b while the branch valve 21 is pressed against the fixed cam 22 by the spring 18. Moved. At this time, the branch valve 21 in contact with the fixed cam 22 moves along the shape of the fixed cam 22, is pushed radially outward, and is pressed against the powder outlet 12b. Therefore, the branch valve 2 is driven only by the driving of the branch valve 21 by the rotation moving mechanism 23.
1 is moved and pressed against the powder outlet 12b, so that powder leakage can be prevented.

The present invention includes the following embodiments. As the outlet closing means, a mechanism other than the mechanism using the rotating cam or the fixed cam described above may be adopted. For example, a rotating mechanism for rotating the branch valve in the circumferential direction of the gate body and an advancing / retracting mechanism for moving the branch valve forward and backward in the radial direction of the gate body are separately provided independently, and the rotating mechanism moves the branch valve to the powder outlet position. It may move and press the branch valve against the powder outlet with the advance / retreat mechanism. In this case, for example, a hydraulic cylinder or the like may be used as the advance / retreat mechanism.

[0030]

According to the present invention, the following effects can be obtained. (1) According to the powder transport branch gate according to the first aspect, the outlet valve closing means for moving the branch valve to the powder outlet and pressing the branch valve against the powder outlet to close the outlet valve is provided.
Since the branch valve is pressed against the powder outlet so that no gap is formed, it is possible to prevent the occurrence of powder leakage, thereby enabling efficient transport of the powder and adversely affecting the surroundings due to the powder leakage. Can be prevented.

(2) According to the powder transport branch gate of the second aspect, the outlet closing means is driven to rotate about the central axis of the gate main body and engages with the branch valve to surround the branch valve. , A biasing mechanism that biases the branch valve toward the rotary cam, and a stopper that stops the branch valve at the powder outlet position. The rotary cam is stopped by the stopper. When it is set to rotate with respect to the branch valve and push the branch valve outward in the radial direction, the branch valve moves to the powder outlet and the powder outlet only by rotating the rotary cam. Pressing can be performed, and powder leakage can be prevented with a simple configuration.

(3) According to the powder transport branch gate of the third aspect, the outlet closing means is fixed to the center shaft of the gate body and the fixed cam contacting the branch valve, and the branch valve is fixed to the fixed cam. A rotating mechanism for moving the branch valve in the circumferential direction, and a biasing mechanism for biasing the branch valve toward the rotating cam.
When the branch valve is moved to the powder outlet position, the branch valve is set to be pushed outward in the radial direction. Can be moved and pressed against the powder outlet, and powder leakage can be prevented with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a powder transport branch gate according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of a main part of the first embodiment of the powder transport branch gate according to the present invention.

FIG. 4 is a cross-sectional view showing a second embodiment of the powder transport branch gate according to the present invention.

FIG. 5 is a partially broken perspective view showing a conventional example of a powder transport branch gate according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Powder transfer branch gate 12 Gate main body 12a Powder inflow port 12b Powder outflow port 13, 21 Branch valve 13c Valve side cam part 14, 25 Outflow port closing means 17 Rotating cam 18 Spring (biasing mechanism) 19 Stopper 22 Fixed Cam 23 Rotational movement mechanism P Powder

Claims (3)

[Claims] 1. A powder valve (P) flowing into a gate body (12) from a powder inlet (12a) is connected to an arbitrary powder outlet of a plurality of powder outlets (12b) by a branch valve. 13,2
A powder transport branch gate (11) that is closed in 1) and transports the powder by flowing out from another powder outlet, and moves the branch valve to the arbitrary powder outlet to branch to the powder outlet. A powder transport branch gate comprising an outlet closing means (14, 25) for pressing and closing a valve. 2. The powder transport branch gate according to claim 1, wherein said gate body (12) is formed in a cylindrical shape, and said powder inlet (12a) and said powder outlet (12b) are formed on a peripheral wall thereof. The branch valve (13) is attached so as to be able to advance and retreat in the radial direction of the gate body, and the outlet closing means (14) is driven to rotate around a central axis of the gate body. A rotary cam (17) that engages with the branch valve and moves the branch valve in the circumferential direction; and a biasing mechanism (1) that biases the branch valve toward the rotary cam.
8) and a stopper (19) for stopping the branch valve at the position of the powder outlet, wherein the rotating cam rotates with respect to the branch valve when the branch valve is stopped by the stopper. A powder transport branch gate, wherein the branch valve is set so as to be pushed outward in the radial direction. 3. The powder transport branch gate according to claim 1, wherein the gate main body (12) is formed in a cylindrical shape, and the powder inlet (12a) and the powder outlet (12b) are formed on the peripheral wall thereof. ) Is formed, the branch valve (21) is attached to be able to advance and retreat in the radial direction of the gate body, and the outlet closing means (25) is fixed to a central axis of the gate body and the branch valve is in contact with the gate valve. Fixed cam (22) to contact
A rotating mechanism (23) for moving the branch valve in the circumferential direction with respect to the fixed cam; and a biasing mechanism (1) for biasing the branch valve toward the rotary cam.
8), wherein the fixed cam is set such that the branch valve is pushed outward in the radial direction when the branch valve moves to the position of the powder outlet. Body transport branch gate.