JPS5921139Y2 - Rotary valve with anti-stick structure - Google Patents

Description

[Detailed description of the invention] This invention relates to a so-called rotary valve that is installed to supply a fixed amount of powder fluid, etc. to equipment, or to discharge a fixed amount of powder from equipment. This invention relates to a rotary valve with a structure that prevents fluid from adhering to the valve body.

As is well known, a conventional rotary valve 1 has a rotor 3 having a large number of fins in a case 2, as shown in FIG. A device in which powder fluid is moved downward and discharged from a lower discharge port 4 is widely used.

This type of product can perform the specified operation if the desired powder fluid is dry and has high flowability, but it is possible to perform the specified operation if the desired powder fluid is dry and has high flowability. When processing sticky powder fluid, the powder fluid tends to adhere to the rotor 3, and once it adheres, it cannot be easily peeled off, and when it is removed, the accumulation progresses and the rotor function is paralyzed. This has the drawback that it becomes difficult to discharge the fuel, resulting in an overload, making it impossible to operate, and that troublesome efforts such as disassembly and cleaning are often required.

The purpose of this invention is to solve the problems of the rotary valve based on the above-mentioned conventional technology as a technical problem, and to enable stable processing even in wet and sticky powder fluid processing.
It is an object of the present invention to provide a rotary valve with an excellent anti-adhesion structure that is useful in the field of removal application in the powder fluid industry.

In order to solve the above-mentioned problems and to control the desired flow rate of moist powder fluid, the structure of this invention in accordance with the above-mentioned purpose is to make the valve body of the rotary valve have an uneven shape with a curved surface,
A technical means in which the material to be processed is transferred through the concave portion, and at the same time, the scraper is brought into sliding contact with the curved surface by the constant biasing force of a counterweight, thereby removing the material to be processed that has adhered to the curved surface. The summary is that the following steps were taken.

Next, one embodiment of this invention will be described below based on the drawings of FIGS. 2 and 3.

Reference numeral 5 designates a rotary valve that embodies the gist of this invention, and inside the case 6 is a valve body 7 whose circumferential surface 8 is curved in four directions as shown in the figure, each of which is formed into a continuous curve at a constant pitch. It is formed into a cylindrical shape with a cross section having a concave portion 9 and a convex portion 10, and is appropriately pivoted on both sides 11 of the case 6, and is connected to a predetermined drive source.

On the other hand, a scraper 1 is provided on the discharge port 12 side of the valve body 7.
3 is installed, and the scraper 13 has a holder 15 of a predetermined length fixedly attached to a shaft 14 that is appropriately supported on both sides 11 of the case 6, and a scraper tip 16 is attached to the tip of the holder 15. have the same width length along the valve body 7 and can be freely mounted, and a continuous rod 17 is provided on the outside of the case 6 on both sides of the shaft 14 in a substantially horizontal direction. A predetermined counterweight 18 is attached to the tip of the counterweight.

19 is an input port.

In the above configuration, in order to discharge the desired powder fluid,
When the rotary valve 5 is installed in, for example, a storage device (not shown) and the valve body 7 is rotated by the rotational force of the driving source at the time of desired discharge, the powdered fluid is guided into the recess 9 of the valve body 7. As it rotates, it is transferred downward, falls down, and is discharged from the discharge port 12.

At this time, if the liquid powder has moisture content, a part of it adheres to the circumferential surface 8 of the valve body 7.

On the other hand, the scraper 12 is always subjected to a constant biasing force due to its own weight by the counterweight 18 on the outside of the case 6, and the scraper tip 16 is always applied to the concave portion 9 and the convex portion 10 of the circumferential surface 8 of the valve body 7. The liquid powder adhering to the circumferential surface 8 is reliably removed by a constant urging force over the entire circumference, and falls and is discharged. It is discharged by the outlet.

Also, due to its viscosity, the powder fluid is applied to the scraper 12 in two directions.
Even if it subsequently adheres, it is removed by the reciprocating swinging movement of the scraper 12.

As mentioned above, according to this invention, the valve body of the rotary valve used for processing wet powder fluids is curved to have uneven parts, so there are no pinched parts and powder fluids are difficult to adhere to. There is a certain effect.

In addition, by forcing the scraper against the valve body through a counterweight so that it comes into circumferential contact with the valve body, powder fluid adhering to the valve body can be reliably peeled off and removed, and adhered to the valve body reliably for the reasons described below. This preventive measure makes it possible to maintain stable valve function at all times, and has the excellent effect of increasing workability.

In other words, the type that urges the scraper against the concave and convex portions of the valve body via a spring corresponds to the compressed length of the spring, and the biasing force is large in the convex portions, especially in the concave portions where a large amount of liquid powder has adhered. This is because, while the biasing force is small, the type in which the scraper is biased via a counterweight can always maintain a constant biasing force against the uneven portion of the main body.

In addition, the structure of the scraper only needs to be equipped with a biasing body such as a counterweight, and as the valve body operates, the biasing force can be used to easily remove the processing material that has adhered to the valve body. be done.

Furthermore, if the scraper is made detachable, it can be used as a normal valve when the scraper is not required depending on the processed material.

Furthermore, since the scraper itself reciprocates and swings, it is possible to remove the liquid powder that has secondarily adhered to the scraper, which has the effect of preventing clogging.

Furthermore, since the uneven parts of the surrounding surface of the valve body are each formed by a continuous curved surface, the scraper can always come into smooth contact with the surrounding surface of the valve even when the valve rotation speed is high. There is no scraping left behind by the scraper on the valve, and an excellent effect is achieved in that powder fluid can be reliably passed through.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of a rotary valve based on the prior art, Figs. 2 and 3 show an embodiment of this invention, Fig. 2 is a schematic explanatory side cross-sectional diagram, and Fig. 3 is its III-II! It is a cross-sectional equivalent explanatory diagram. 3.7...Valve body, 12...Scraper 1,5...Rotary valve, 8...
... Circumferential surface, 9 ... Concavity, 10 ...
Convex portion, 18... biasing body.

Claims (1)

[Scope of utility model registration request] The valve body has a scraper for the valve body, the peripheral surface of the valve body is curved with uneven parts at a predetermined pitch, and the scraper is able to come into contact with the valve body via a biasing body, and the biasing body is What is claimed is: 1. A rotary valve having an anti-adhesion structure that is a balance weight, wherein the uneven portions on the circumferential surface of the valve body are each formed by a continuous curved surface.