JPS5855078B2 - Bucket type powder stop valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a stop valve made of granular material such as reduced iron pellets.

As conventional stop valves of this type, the packet type shown in FIG. 1 or the damper type shown in FIG. 2 are generally used.

A common drawback of any of the above types is that while the powder is falling,
When closing the stop valve, just before the fully closed position, the powder body gets caught between the valve body a and the valve seat or between the valve body a and the valve body a (Fig. 1). However, it is difficult to ensure an accurate full closing operation each time the stop valve closes.

As a result, a gap is created between the valve body and the valve seat, and fine particles may fall through the gap, causing an accident that may damage the functionality of equipment used in the next process (for example, gas seal valves, etc.). That's the point.

The present invention was proposed for the purpose of solving the above-mentioned drawbacks of the conventional packet-type powder stop valve. A bracket protruding from the bracket, an auxiliary flapper whose base is rotatably supported by the bracket, and which is normally held in a hanging state by its own weight; one end rotatably placed in an appropriate position on the side of one of the valve bodies A drive link that is pivotally supported by the drive link and has a slider at the other end, has a long groove at one end into which the slider of the drive link is slidably fitted, and the other end is attached to the base of the upper Yamasuke flap. A fixed driven link is provided at a suitable position on the side of the other valve body and protrudes from the side of the one valve body, and comes into contact with the drive link when the one valve body and the other valve body are closed. The auxiliary flap is rotated counterclockwise about the pivot point at the base of the auxiliary flap through a link mechanism consisting of the driving link and the driven link, so that the auxiliary flap covers the portion immediately below between the two valve bodies. This invention relates to a stop valve for packet-type powder and granular material, characterized in that it is equipped with a cam member that operates in such a manner that the stop valve operates in such a manner that the stop valve operates as shown in FIG.

The present invention will be specifically explained below with reference to embodiments shown in FIGS. 3 to 5.

In Figure 3, 1 and 2 are water-cooled valve seats 5 (see Figure 4)
The base is fixed to shaft rods 4 and 4' that are symmetrically supported at appropriate positions on the valve seat 5 across the axis X-X of There are a pair of valve bodies, and the tips of the valve bodies 1 and 2 are located at the centers 01 and 0 of the shaft rods 4 and 4'.
It is formed into an arc shape with a radius of curvature centered at 2.

In addition, by making the center of curvature 03 of the valve seat 5 in contact with the arched end portions of the valve bodies 1 and 2 eccentric to the center of curvature 01.02 of the valve bodies 1 and 2, when the valve is opened, The structure that prevents the particles from being bitten into the valve bodies 1 and 2 and the valve seat is almost the same as the structure of the conventional packet-type powder stop valve mentioned above. is a drive link rotatably supported by a pin 10 disposed at an appropriate position on the side surface of the valve body 2 of the valve body 1, and the other end of the drive link 9 is connected via a slider 11. It is slidably fitted into a sliding groove 12a of a driven link 12 fixed to an auxiliary flap 6, which will be described later.

Reference numeral 7 denotes a bracket protruding from an appropriate position on the outer circumferential end surface of the tip arc-shaped portion of the valve body 1. On the bracket 7, an auxiliary flap 6 whose base portion is rotatably supported via a pin 8 is supported. The auxiliary flap 6 normally hangs down due to its own weight as shown by the two-dot chain line in FIG. 3 when the valve bodies 1 and 2 are closed.

(Position of the two-dot chain line in Fig. 4, AQ quantity indicator in Fig. 5) 13 is a cam provided on the side surface of the valve body 2 on the valve body 1 side so as to protrude toward the valve body 1 side. The cam member 13 is rotated in the direction in which both the valve bodies 1 and 2 close, and when the distance between the valve bodies 1 and 2 reaches a set value, the cam member 13 and the drive link 9
starts contact, and as the valve bodies 1 and 2 further close, the auxiliary flap 6 is rotated counterclockwise about the pin 8 via a link mechanism consisting of a drive link 9, a driven link 12, etc. Position B in the figure is taken, and the area directly below the joint of both valve bodies 1.2 is covered from below.

When the valve bodies 1 and 2 are opened and the cam 13 is separated from the drive link 9, the auxiliary flap 6 automatically rotates clockwise around the pin 8 and hangs down. One embodiment is configured as described above, and the present stop valve is a valve as shown in FIG. They are arranged and used in the box 3 so that their axes coincide.

If it is necessary to stop the charging or discharging of the raw material from the raw material charging section or the discharge section, (usually, the valve body 1
, 2 are in the open state shown by the two-dot chain line in FIG.
position) and is in a condition that does not impede the charging or discharging of raw materials.

) Rotate the valve bodies 1 and 2 in the closing direction in the same manner as the conventional packet type stop valve, and set the distance between the valve bodies 1 and 2 to the set value (this is set arbitrarily when determining the dimensions of the cam member 13 and the drive link 9). Can be set to

), the cam member 13 and the drive link 9 start contacting each other, and as both the valve bodies 1 and 2 further rotate in the closing direction, the auxiliary flap 6 moves to the pin 8 via the link mechanism.
The valve bodies 1 and 2 rotate toward the lower surface of the arched tips of the valve bodies 1 and 2 until they are closed, and finally reach position B shown in Fig. 5. reach.

(In this case, the gap between the two valve bodies 1 and 2 becomes zero.) During the closing operation of the valve bodies 1 and 2, for some reason, the gap between the two valve bodies 1 and 2 becomes zero.
If the powder or granules of the raw material falling between the valve bodies 1 and 2 are caught between the valve bodies 1 and 2, and the further closing operation of the valve bodies 1 and 2 is stopped, the further closing operation of the auxiliary flap 6 is stopped. Rotation also stops.

Here, both valve bodies 1 and 2 at the time of biting of the powder or granular material.
The gap t (see Fig. 5) can be easily estimated by pre-caking, so when this gap t is created between the two valve bodies 1.2, the auxiliary flap 6 will move the powder or granule material that falls through the gap t. By setting the length ratio of each link 9, 12 of the link mechanism so that it can be rotated to the position where it can be stopped (position C in Figure 5), even when the above situation occurs, powder particles can be It can prevent your body from falling.

The falling prevention effect of the auxiliary flap 6 on the powder body is the same even when a gap is created between the valve body and the valve seat.

Since the stop valve for powder or granular material of the present invention has the above-described structure and operation, the present invention provides a packet-type stop valve for powder or granular material in which both valve bodies 1 and 2 are closed. During operation,
Even if a gap is created between the two valve bodies 1 and 2 or between the valve body 1゜2 and the valve seat 5 due to powder being caught, the action of the auxiliary flap 60 will completely prevent the powder from falling. This can have the practical effect of being able to prevent this.

[Brief explanation of the drawing]

FIG. 1 is an implied side view of a conventional packet-type powder stop valve, FIG. 2 is an implicit side view of a conventional damper-type powder stop valve, and FIGS. 3 to 5 are one example of the present invention. 3 is a side view, FIG. 4 is a vertical sectional view when installed in the valve box, and FIG. 5 is a diagram showing the auxiliary flap 6 when the valve bodies 1 and 2 are closed. It is an explanatory diagram of an operating state. In FIG. 3 to FIG. 5, 1, 2... Valve body,
3... Valve box, 4, 4'... Rotating shaft, 5
... Valve seat, 6... Auxiliary flap, 7.
...Bracket, 8...Pin, 9...
... Drive link, 10... Pin, 11...
... Slider, 12 ... Followed link, 13 ... Cam member.

Claims (1)

[Claims] 1 A bracket that protrudes from the lower surface of the arched end of one of the valve bodies in a packet-type powder stop valve, the base of which is rotatably supported by the bracket, and is normally held in a hanging state by its own weight. an auxiliary flapper, which is rotatably supported at one end at an appropriate position on the side surface of the one valve body, and a drive link having a slider at the other end, and the slider of the drive link is slidably fitted. A driven link having a mating long groove at one end and fixed at the other end to the base of the auxiliary flap, provided at an appropriate position on the side of the other valve body, and protruding from the side of the one valve body; When the body and the other valve body are closed, the auxiliary flap contacts the drive link and moves the auxiliary flap counterclockwise about the pivot point at its base via a link mechanism consisting of the drive link and the driven link. A packet-type powder stop valve comprising a cam member which is rotated so that the auxiliary flapper covers a portion directly below the valve body.