JPS6034378A - Discharger for liquid material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid material discharge device that smoothly discharges liquid material from a tank or the like containing liquid material.

Conventionally, devices for discharging liquid materials from tanks include:
Ball valves, bottom valves, etc. are known. A ball valve has a spherical valve body slidably disposed on a valve seat provided in the main body, and is opened and closed by rotating the spherical valve body. Since the sliding surfaces of the valve seat and the valve body are sealed by interposing a sealing material between the two and making line or surface contact, a gap is created between the valve seat and the valve body. do. Therefore, liquid material may enter this gap when opening and closing operations.
The liquid material that has entered this gap accumulates in this gap and is not easy to clean. Furthermore, air bubbles mixed in the liquid material may be trapped in the gap, and when the valve element is opened/closed, they may escape from the gap, enter the liquid material, and be discharged together.

The bottom valve is provided with a valve body at the discharge port, and the valve body is opened and closed by moving a stem that extends through the discharge pipe downward by -L using an external opening and closing mechanism. It looks like this. This bottom valve has a stem inside the discharge pipe for opening and closing the valve body, and in order to move the stem downward, the discharge pipe is bent and the end of the stem protrudes outside the discharge pipe. It is designed to move up and down using an opening and closing mechanism. In this way, the discharge channel is not straight and has a stem in the discharge channel and a seal mechanism in the part where the stem protrudes from the discharge pipe, so the discharge of liquid material is obstructed by these and accumulates in this part, and cleaning Moreover, there are problems such as air bubbles being easily trapped by these.

For this reason, as disclosed in Japanese Patent Application Laid-Open No. 55-44133, a main body that slidably supports a hollow discharge pipe is provided at the bottom of a tank or the like containing a liquid material, and this hollow discharge pipe is connected to a drive mechanism up and down. The liquid material is discharged through the hollow discharge pipe by opening the discharge port opening at the -L part of the hollow discharge pipe, eliminating the seal part and stem in the discharge passage and solving the above problem. There is something I tried to do.

However, in this case, the discharge port is formed on one side of the hollow discharge pipe, and the inside of the hollow discharge pipe on the -E side of this discharge port is hollow, so when discharging the liquid material, this There are problems such as negative pressure in the cavity, which causes the liquid material to be drawn in, slowing down the discharge speed, and trapping air bubbles in the cavity, which impedes floating defoaming.

This invention was made against the background of this situation, and there is no seal part or stem in the discharge flow path, which prevents the accumulation of liquid material and improves cleaning performance, and also allows smooth discharge of liquid material. Moreover, it is an object of the present invention to provide a liquid material discharge device that allows smooth defoaming without trapping air bubbles.

In order to achieve the above-mentioned object, the present invention provides a main body provided in a tank or the like containing a liquid material, - a hollow discharge pipe having a valve body and a discharge port at the upper part, movable by a drive mechanism;
In the liquid material discharge device in which the discharge port is opened by moving the hollow discharge pipe and the liquid material is discharged through the hollow discharge pipe, the valve body is inserted into the two-part opening end of the hollow discharge pipe. The insertion portion of the valve body is arranged to face a discharge port opening at the side of the hollow discharge pipe, and the insertion portion is characterized by having an inclined surface facing in the outflow direction from the discharge port.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

In the liquid material discharge device A, a protrusion la of the device main body l is fitted into a fitting portion 2a formed on the bottom portion 2 of a tank containing the liquid material, and is fastened and fixed by a mounting port 3. A hollow discharge pipe 4 is slidably provided in this device main body l. A piston 5 is integrally provided on the outer periphery of the central portion of the hollow discharge pipe 4, and slides within a cylinder 6 formed in the device main body l.

An O-ring 7 is attached to the outer periphery of the piston 5, and the inside of the cylinder 6 is divided into an L section chamber 8 and a lower chamber 9 by this piston 5.
It is divided into.

A pressure supply port 10 communicates with the upper chamber 8, and a pressure supply port 11 communicates with the lower chamber 9. When air is supplied to the upper chamber 8 from the pressure supply port 10, the piston 5 is pushed downward by the air pressure, thereby causing the hollow discharge pipe 4 to descend. On the other hand, air is supplied from the pressure supply port 11 to the lower chamber 9.
When supplied to -L, the piston 5 is pushed upward by air pressure.
This causes the hollow discharge pipe 4 to rise upward.

A pair of outlet portions 12 are formed at symmetrical positions on the sides of the two parts of the hollow discharge pipe 4, and when the hollow discharge pipe 4 is raised, they protrude from the bottom 2 of the tank and open to drain the liquid material in the tank. It is designed to lead into the inside of the hollow discharge pipe 4. A valve body 13 is fitted to the -L opening end 4a of the hollow discharge pipe 4, and a seal member 14 is fitted to the outer periphery of the upper opening end 4a.
is installed. When the hollow discharge pipe 4 is lowered, the seal member 14 is tightly sealed against the valve seat 15 of the protrusion 1a of the main body of the apparatus, thereby preventing discharge of the liquid material.

The insertion portion 13a of the valve body 13 is fitted so as to face the discharge port 12 opened at the side of the hollow discharge pipe 4, and the lower part of the insertion portion 13a is formed in a conical shape.
It has an inclined surface 13b facing in the outflow direction from the upper surface 12a.

As a result, the inside of the upper part of the hollow discharge pipe 4 is closed by the insertion part 13a of the valve body 13, and the inclined surface 13b of the insertion part 13a is closed.
The liquid material is guided and swirled, and the liquid material is smoothly discharged. Furthermore, when the discharge port 12 of the hollow discharge pipe 4 is opened, air bubbles contained inside and in the liquid material are removed from the insertion section 1.
The floating air bubbles can be smoothly and reliably discharged by the inclined surface 13b of No. 3. Note that both sides of the cylinder 6 are 0
- sealed by rings 16.17;

Although it is sufficient that the opening area of the discharge port 12 is the same as the cross-sectional area of the hollow discharge pipe 4, the opening area of the discharge port 12 may be increased to facilitate the removal of air bubbles. Further, it is desirable that the angle α of the inclined surface 13b of the insertion portion 13 is 160 degrees or less from the viewpoint of discharging the liquid material and floating the air bubbles. The material of the valve body 13 is preferably stainless steel with a mirror finish or Teflon coating to prevent air bubbles from adhering.

Note that the drive mechanism for moving the hollow discharge pipe 4 up and down is not limited to air, and may use hydraulic pressure or a combination of air and a spring.

As described above, in this invention, the insertion part of the valve body is made to face a part of the outlet part of the hollow discharge pipe provided in the main body of the apparatus, and the insertion part has an inclined surface facing in the outflow direction from the outlet part. Because of this, there are no gaps or cavities within the hollow discharge pipe, and the liquid material is guided from the discharge port to the inclined surface and smoothly discharged.

Therefore, no liquid material remains in the hollow discharge pipe, so when new liquid material is put into the tank and this liquid material is discharged, there is no risk of mixing and deteriorating the quality of the liquid material, and cleaning can only be done by passing water through the pipe. It's easy. In addition, air bubbles existing in the hollow discharge pipe or in the liquid material are guided by the inclined surface and float, and are easily discharged, preventing the bubbles from mixing into the liquid material, reducing the quality of the liquid material being discharged. There's nothing to do.

Therefore, the present invention is applicable to manufacturing processes of products in which mixing of liquid materials with residual liquid of other liquid materials or the presence of air bubbles adversely affects the quality of liquid materials, such as lamination, adhesive tape, magnetic tape, etc., especially in laminated coating processes. This is effective when discharging the subtracted liquid material to another tank or device.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional front view, FIG. 2 is a sectional side view, and FIG. 3 is a perspective view of a state in which liquid material is discharged. 1 is the device body 2 is the tank bottom 4 is the hollow discharge pipe 5 is the piston 6 is the cylinder 12 is the discharge port 13 is the valve body 13a is the insertion part 13b is the inclined plane Patent applicant Konishiroku Photo Industry Co., Ltd. District 1

Claims (1)

[Claims] A hollow discharge pipe having a valve body and a discharge port at the upper part is movably provided in a main body provided in a tank or the like for storing a liquid material by a drive mechanism, and the discharge port is opened by movement of the hollow discharge pipe to discharge the liquid material. In a liquid material discharge device configured to discharge through a hollow discharge pipe, the valve body is inserted into the upper open end of the hollow discharge pipe, and the insertion portion of the valve body is inserted into the side of the hollow discharge pipe. 1. A liquid material discharge device, characterized in that the insertion portion has an inclined surface facing an open discharge port and facing in an outflow direction from the discharge port.