JP2022039167A - Switch valve - Google Patents

Abstract

To provide a switch valve that has a simple structure, light weight, is easily handled, can be installed in a small space, decreases wear in granules, and sends the granules to a plurality of sending destinations.SOLUTION: In a switch valve 1, granules send from a transport pipe to a connection port of a valve body 7 pass through a connection port of a valve seat 10. By receiving pressing of a roller 2, the valve body 7 and the valve seat 10 are closely contacted through a gasket 7a to prevent leakage. At the time of switching, a movement guide rail 6 guides a roller holder 3 and a pressing adjusting screw holder 5 to move. At the time of moving, the valve body 7 attached to a linear bearing 8 is fallen between the roller 2 and the other roller 2, is put on the roller holder 3, and is moved to a lower part of the other connection port by being guided by a valve movement guide 9. While movement is stopped when a center of the connection port of the valve body 7 matches a center of the other connection port of the valve seat 10, the roller holder 3 and the pressing adjusting screw holder 5 move until the roller 2 is closely contacted with the valve body 7 and the valve seat 10.SELECTED DRAWING: Figure 1

Description

Regarding a switching valve that changes the flow path in the air transportation of powder or granular material

In order to change the flow path in the air transportation of powder or granular material, a hose, a flexible tube or the like, a Y-shaped ball valve, a Y-shaped damper or the like is generally used.

Japanese Patent Laid-Open No. 11-153237

In the air transportation of powder or granular material, a Y-type damper and a Y-type ball valve are used as devices for changing the destination and the receiving destination. A Y-shaped ball valve is used for the pipeline that requires airtightness, but the cylinder is rotated by a rotary actuator or a combination of a gear and an air cylinder to change the flow path. Therefore, it is necessary to have a heavy weight, a large outer shape, and a large installation space. Due to the large number of parts and the complicated structure, a skilled technician is required for maintenance. Since the angle to be changed is often 45 degrees, it is necessary to decide the installation location in consideration of securing the pipeline space. In addition, the tablet-like granules damage the surface because the flow path is changed rapidly. There are very few Y-type ball valves with a diameter of 25A or less, and even if they exist, the delivery time is long and the price is high. The present invention provides a switching valve with a simple structure, quick delivery, low cost, and minimal damage to the fluid.

With the opening of the valve seat 10 processed into a flat plate and the center line of the opening having the same shape as the valve seat 10 of the valve body 7 processed into a flat plate coincide with each other, the roller 2 makes the valve body 7 into the valve seat 10. Apply pressure so that they are in close contact. The opening is sealed with a gasket 7a inserted into a groove machined around the opening of the valve body 7. The pushing force of the valve body 7 is adjusted by the pressing adjusting screw 4. When changing the destination or the receiving destination, the roller holder 3 and the pressing adjustment holder 5 move toward the opening to be changed by using the roller moving guide rail 6 as a guide. At the moment when the pressing roller 2 is disengaged from the valve body 7, the valve body 7 bolted to the linear bearing 8 receives its own weight and the force of the rotation assist plate 12 under the pressure of the spring 13, and the valve body moves. Rotate and fall to the roller holder 3 around the guide 9. While the valve body 7 that has rotated and dropped is being moved, it is changed while being sandwiched between the rollers 2 under the pressure of the rotation assist plate 12 until the opening of the valve body 7 coincides with the opening of the valve seat 10. Move to the opening. The center of the opening of the moved valve body 7 and the center of the opening of the same shape of the current seat 10 stop at the same position, but in the roller holder 3 and the pressure adjustment holder 5, the roller 2 is the valve body 7 and the valve seat. Continues to move to the most effective position where 10 is in close contact and stops. An air cylinder 17 is used to move the roller holder 3 and the pressure adjustment holder 5.

Compact, lightweight, simple in structure, small installation space, no wear due to collisions, raw materials for almost all parts and processed products are available on the general market and simple in structure, so they can be manufactured at low cost and in a short delivery time.

Front view of the entire switching valve composed of the components of the present invention. Cross-sectional view of a side surface of a switching valve made of the components of the present invention when connected to a flow path. Detailed cross-sectional view of the side surface when moving from the flow path of the switching valve composed of the components of the present invention to the flow path. Detailed cross-sectional view of the front surface of the switching valve made of the components of the present invention when connected to the flow path. Detailed front sectional view of the switching valve composed of the components of the present invention immediately after the flow path is released. Detailed cross-sectional view of the front surface of the switching valve made of the components of the present invention when moving. Detailed cross-sectional view of the front surface of the switching valve made of the components of the present invention immediately before the flow path connection. Detailed cross-sectional view of the front immediately after connecting the other flow path of the switching valve composed of the components of the present invention.

The flow direction of the switching valve of the present invention may be either from the valve body to the valve seat or from the valve seat to the valve body, but since the valve body moves, the pipes connected to the valve body are flexible pipes, hoses, etc. It is desirable to make it a flexible part and have a margin. In order to connect pipes and the like, it is necessary to weld pipes directly to the valve body and valve seat, and to process gas screws on the inner surface of the opening.

2 and 4 show a state in which the opening of the valve seat 10 and the center line of the opening of the valve body 7 coincide with each other and the powder or granular material flows. The valve body 7 is in close contact with the valve seat 10 by a roller 2 previously adjusted by the pressing adjustment screw 4. The valve body 7 and the valve seat 10 are hermetically sealed by the gasket 7a. 3 and 5 show a state immediately before the valve body 7 moves. When the roller 2 is disengaged from the valve body 7, the valve body 7 attached to the linear bearing 8 rotates slightly around the valve body movement guide 9 and rides on the roller holder 3. The spring 13 assists the rotation of the valve body 7 via the rotation assist plate 12. FIG. 6 shows a state in which the valve body 7 is in the process of moving from the opening of the valve seat 10 to another opening. The valve body 7 sandwiched between the two rollers 2 of the roller holder 3 and attached to the linear bearing 8 is guided by the valve body movement guide 9 to the opening of the other valve seat 10 and the opening of the valve body 7. Move and stop until the center lines match. The stopped state is shown in FIG. Although the valve body 7 stops, the roller holder 3 and the pressure adjusting screw holder 5 continue to move, and the adjusted roller 2 stops moving to the optimum position where the valve body 7 comes into close contact with the valve seat 10. FIG. 8 shows a state in which the movement is stopped. It becomes possible to flow the powder or granular material in the state of FIG. The moving drive source is an air cylinder 17, but other reciprocating devices may be used. Further, in order to deal with a power failure and a trouble of the drive source, a handle can be attached to the roller holder 3 and the vehicle can be moved manually.

The switching valve of the present invention can be installed in the air transport path of powder or granular material and used as a valve for changing the destination or the receiving destination. Especially useful for transportation using pipes or hoses with an inner diameter of about 30 mm or less. Even a flow path having an inner diameter of more than about 30 mm is useful depending on conditions such as cost performance, installation space, or restrictions on the flow path.

1: Switching valve
2: Roller
3: Roller holder
4: Pressing adjustment screw
5: Press adjustment screw holder
6: Roller movement guide rail
7: Valve body
7a: Gasket
8: Linear bearing
9: Valve body movement guide
10: Valve seat
11: Valve seat side plate
12: Rotation auxiliary plate
13: Spring
14: Spring holder
15: Hinge
16: Frame
17: Drive

Claims (1)

A flat plate valve seat with multiple openings, a movable valve body with one opening, a linear bearing to attach the valve body, and a linear bearing that are installed in the transport pipeline of the powder and granules are straight. Adjust the pressure of the moving guide, the flat plate that fixes the valve seat and shaft, the spring and flat plate that assist the rotation of the valve body, the flat plate that moves the valve body and the pair of rollers, and the roller of the flat plate that moves the valve body. A switching valve consisting of a bolt, a flat plate to attach the bolt, a flat plate to move the valve body, a rail to guide the linear movement of the plate to attach the bolt to adjust the pressure, a moving drive device, and a frame to attach the drive device.

Images