JPH0882282A - Follow plate device for pump - Google Patents

Abstract

(57) [Summary] [Purpose] The efficiency of pumping work of high viscosity materials is dramatically improved,
Provided is a follow plate device for a pump, which is capable of avoiding contamination due to a high viscosity material. [Structure] In a follow plate device 1 for efficiently supplying a highly viscous material in a drum into a pump, a holding plate 3a attached to an upper surface of a follow plate body 2 and a bottom plate 4 having the same diameter as the follow plate device 1 are attached. When the bottom plate 4 is fixed to the holding plate 3b and the bottom plate 4 contacts the upper surface of the high-viscosity material in the drum can, the outer diameter of the follow plate body 2 and the bottom plate 4 increases due to the weight of the pump and the descending air pressure.
A follow plate device 1 having an annular seal material 5 made of rubber having a larger diameter than that of the above and having high elasticity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a follow plate device used in an air-driven pump for high-viscosity materials for taking out high-viscosity materials such as adhesives, silicone, grease, and printing ink from a drum can and feeding them.

[0002]

2. Description of the Related Art In conventional follow plate devices used for pumps for high viscosity materials, an annular rubber ring is formed on the outer periphery of the follow plate body so as to have a diameter larger than the inner diameter of a drum can. Met. In such a device, it is necessary to wrap a metal band around the circumference of the rubber ring and then fasten it with a special tool to fix it to the follow plate body, which is extremely troublesome in work. It has also been recognized as an empirical fact that since the rubber ring is not integrally molded, a slight gap is created at the joints at both ends, and the sealing property is poor. On the other hand, since the outer diameter of the rubber ring is larger than the inner diameter of the drum can as described above, in the process of mounting such a follow plate device in the drum can, air is removed from the air vent hole provided in the follow plate body and inserted into the drum can. It is often observed that when the bottom plate comes into contact with the upper surface of the high-viscosity material, a part of the material splashes to the outside through the air vent hole and stains the follow plate device and its periphery. Therefore, the work of closing the air vent hole is extremely careful, but the timing is difficult, and the fact is that the high viscosity material is eventually sprayed from the air vent hole. Also, when the pump operation work is completed and the high-viscosity material in the drum can is emptied, in the process of raising and removing the follow plate device, the state in which the rubber ring and the inner surface of the drum can are in close contact with each other is maintained. Since air must be sent to the bottom of the plate body, the air supply work is troublesome and the rubber ring rises while closely contacting the inner surface of the drum can.
By scraping off the high viscosity material adhering to the inner surface, the result is that the follow plate device and its surroundings are soiled. Further, since the high-viscosity material in the drum can disappears, and the weight of the drum can alone, the degree of close contact with the inner surface of the drum can when the rubber ring rises is still strong, so that the drum can itself is often lifted.

[0003]

In order to cope with such a conventional technique, a rubber ring provided on the outer peripheral portion of the follow plate body and having a structure in which the outer diameter thereof expands or contracts when air is supplied. A follower plate device having a structure is known. Certainly, according to such known technology, installation of the follow plate device in the drum can,
It is possible to avoid contamination around the highly viscous material that is inevitably associated with the removal process. However, the complexity of the work for supplying air to enlarge or reduce the outer diameter of the rubber ring still remains. Also, since the rubber ring and the inner seal surface of the drum can make surface contact,
There is a problem with the strength of the seal, and it is not possible to completely deal with unevenness and deformation of the inner surface of the drum can.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to mount a follow plate device in a drum can.
By avoiding close contact between the inner surface of the drum and the sealing material during the removal process, the follow plate device and its surroundings can be eliminated from contamination by high-viscosity material, and the air bleeding and air supply operations can be eliminated, and the sealing part can be line-contacted from surface contact. By improving the sealing property, it is possible to withstand the deformation of the inner surface of the drum can.

[0005]

In order to achieve the above object, a pump follow plate device 1 according to the present invention is provided.
Is provided at the lower end of an air-driven pump for high-viscosity materials used for drums, and in the follow plate device 1 that efficiently supplies the high-viscosity materials in the drums into the pump,
Only when the pressing plate 3a attached to the upper surface of the follow plate body 2 and the pressing plate 3b attached to the bottom plate 4 of the same type as the follow plate body 2 are fixed, and the bottom plate 4 contacts the upper surface of the high-viscosity material in the drum can. It is characterized in that it is provided with an annular seal member 5 made of rubber having a large elasticity, which is larger in diameter than the follow plate body 2 and the bottom plate 4 by expanding its outer diameter by its own weight and descending air pressure.

[0006]

According to the follow plate device 1 as described above, in the process of mounting or removing the follow plate device 1 into or from the drum, the seal material 5 expands downward due to its elasticity due to its own weight of the follow plate body 2. The outer diameter of the material 5 is reduced.

During pump operation, the outer diameter of the sealing material 5 increases due to the weight of the pump installed above the follow plate device 1 and the descending air pressure.

[0008]

【Example】

As shown in FIGS. 1 and 2, a follow plate device 1 for efficiently supplying the high-viscosity material in the drum can is attached to the lower end of the air-driven high-viscosity material pump used in the drum can. There is.

The follow plate device 1 is fixed to the follow plate main body 2, a bottom plate 4 having the same diameter as the main body, a holding plate 3a attached to the upper surface of the main body, and a holding plate 3b attached to the bottom plate 4 with bolts 6 or the like. It is composed of a circular ring-shaped seal material 5.

Follow plate device 1 shown in FIG.
Shows the state of the process of mounting to and removing from the drum can. That is, the seal material 5 fixed to the holding plate 3a on the upper surface of the follow plate body 2 and the holding plate 3b of the bottom plate 4 via the bolts 6 and the like extends due to the weight of the follow plate body 2. As a result, the outer diameter of the sealing material 5 becomes substantially equal to the outer diameters of the holding plate 3a and the bottom plate 4 of the follow plate body 2, and the outer diameter of the follow plate device 1 becomes smaller than the inner diameter of the drum can.

The follow plate device 1 shown in FIG.
Shows the state when the attachment to the inside of the drum is completed, that is, the state where the bottom plate 4 of the plate is in contact with the upper surface of the high-viscosity material and the state during pump operation work. As a result, the sealing material 5
The outer diameter of is larger than the outer diameters of the holding plate 3a and the bottom plate 4 of the follow plate body 2, and the sealing material 5 adheres to the inner surface of the drum can.

By appropriately performing a series of operations in the state shown in FIGS. 1 and 2, the conventional air supply and exhaust operations, various operations associated therewith, high viscosity material removing operations, and preparatory operations therefor can be performed. Without any need, a pilot implementation made it possible to reduce the time to about 1/12 compared to the average time of conventional man-hours spent throughout the work.

It is desirable that the inner diameter of the drum can originally be one that clears the numerical value of JIS standard, but its shape is often deformed due to work process, transportation and the like. Correspondingly, as shown in FIG. 3, the sealing material 5 according to the present invention, due to the peculiarity and elasticity of the shape thereof, bends appropriately upward while maintaining close contact with the inner surface 7 of the drum can and withstands deformation of the drum can. It has a variable structure. As is clear from the test results shown in FIG. 4, when the drum can was forcibly deformed from the left and right to perform the test work, the standard error was + 9.0-10.0 (m
The sealing condition of the sealing material was good up to m).

[0015]

Since the present invention is configured as described above, it has the following effects.

In the follow plate device provided in the air-driven pump for high-viscosity material used in the drum can according to claim 1, the highly elastic sealing material is used in the process of mounting and removing the follow plate device in the drum can. Since the plate device expands due to its own weight and the outer diameter is reduced, it is possible to perform the work of pumping highly viscous materials without the need for exhausting and supplying air, and it is possible to dramatically improve the work efficiency, and at the same time, degas the air. It is possible to prevent the high-viscosity material from splashing from the holes, and it is possible to eliminate stains on the follow plate device and its surroundings. The sealing property is improved by the line contact between the sealing material and the inner surface of the drum can, and the strength of the sealing property can be maintained even when the drum can is deformed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a pump follow plate device of the present invention.

FIG. 2 is a sectional view showing an embodiment of a pump follow plate device of the present invention.

FIG. 3 is a cross-sectional view showing a sealing state of a sealing material in the pump follow plate device of the present invention.

FIG. 4 is a diagram showing a result of a test of work effect on deformation of a drum can.

[Explanation of symbols]

 1. Follow plate device 2. Follow plate body 3a. Holding plate 3b. Presser plate 4. Bottom plate 5. Seal material 7. Inside of drum

Claims (1)

[Claims] 1. A follow plate device, which is provided at the lower end of an air-driven pump for high-viscosity material used for a drum can and which efficiently supplies the high-viscosity material in the drum can into the pump, is attached to the upper surface of the follow plate body. The presser plate and the follow plate are fixed to the presser plate attached to the bottom plate with the same diameter as the device, and the outer diameter increases due to the weight of the pump and the descending air pressure only when the bottom plate contacts the upper surface of the high-viscosity material in the drum can. A follow plate device equipped with a ring-shaped sealing material made of rubber, which has a larger diameter than the follow plate main body and the bottom plate and is highly elastic.