JPH06135491A - Terile valve for filling device - Google Patents

Abstract

PURPOSE:To enhance sterility of a sterile valve by leaving no gap on an outer surface of a filling device, which is in contact with a filling liquid. CONSTITUTION:A liquid feed pipe 4 for feeding a filling liquid from a filling liquid tank and a liquid injection pipe 6 for filling the liquid in a liquid passage into a container are opened to the filling liquid passage 1a. A liquid valve 2 is provided in the filling liquid passage and allows the liquid feed pipe 4 to communicate to or to be cut off from the liquid injection pipe 6. A bellows 14 is mounted on a valve body 8 constituting the liquid valve 2 to block the interior of the filling liquid passage 1a from the external side. The valve body 8 comprises a sheet member 12 seated on a valve seat 1b formed in the filling liquid passage, a tightening pin 16 coupling the sheet member with a piston rod 10 of a valve body operating cylinder, and a cap 24 covering the tightening pin 16. Both the sheet member 12 and the cap 24 are composed of Teflon and fixed together by welding the outer peripheral side of their junction. According to this structure, the valve body has no gap at its liquid-contacting part; therefore, the filling liquid does not infiltrate and various germs do not propagate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling device, and more particularly,
The present invention relates to a sterile valve in which a sealing means such as a bellows or a diaphragm is attached to a valve body constituting a liquid valve to shut the inside of a filling liquid passage from the outside.

[0002]

2. Description of the Related Art FIG. 2 is a diagram showing an example of a conventional aseptic valve of a filling device, in which a filling liquid passage 100a is formed in a valve housing 100, and the filling liquid passage 1 is formed inside.
A liquid valve 102 for opening and closing 00a is provided. A liquid supply pipe 104 connected to a filling liquid tank (not shown) is opened above the liquid valve 102 of the filling liquid passage 100a, and a liquid injection pipe connected to a filling nozzle (not shown) is opened below the liquid valve 102. 106 is open. Liquid valve 1
The valve body 108 that constitutes 02 is the valve housing 100.
Is connected to a piston rod 110 of a cylinder (not shown) provided above the cylinder and moves up and down.
4 is cut off from the liquid injection pipe 106, and when rising, the liquid supply pipe 104 and the liquid injection pipe 106 are communicated with each other to fill the container.

The valve body 108 is a valve housing 10.
A seal member 11 seated on a valve seat 100b formed in 0
2 and a bellows 1 which is provided integrally with the sealing member 112 and has an upper portion 114a fitted and held liquid-tightly above the opening of the liquid injection pipe 104 of the filling liquid passage 100a.
14 and the seal member 112 to the piston rod 110
And a fastening pin 116 made of stainless steel. An annular seal member 118 is interposed between the seal member 112 and the fastening pin 116 to seal the inside and the outside of the filling liquid passage 100a in which the liquid valve 102 is arranged.

FIG. 3 shows another example of a conventional aseptic valve. The same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. In this aseptic valve, the inner peripheral side 122a of the diaphragm 122, the outer peripheral side 122a of which is fixed to the valve housing 100, is fitted to the upper part of the valve body 120, and the inner side and the outer side of the filling liquid passage 100a are blocked. ing. An annular seal member 124 made of rubber is fitted in an annular groove 120a formed on the lower surface side of the portion of the valve body 120 that is seated on the valve seat 100b.

[0005]

In the conventional aseptic valve shown in FIG. 2, the liquid-tightness inside and outside the filling liquid passage 100a can be maintained by the annular seal member 118, but below the seal member 112. There was a gap in the contact portion 119 between the seal member 112 and the fastening pin 116. If there is such a gap, there is a problem that the filling liquid penetrates into the interior and various bacteria are generated.

Also in the case of FIG. 3, there is a similar problem because there is a gap between the annular groove 120a of the valve body 120 and the rubber annular seal member 124.

The present invention has been made in order to eliminate the above-mentioned drawbacks. A gap is not formed in the liquid contact portion located in the filling liquid passage of the valve body, and the filling liquid penetrates to generate various bacteria. It is intended to provide a sterile valve of a filling device which prevents the above-mentioned operation.

[0008]

The aseptic valve of the filling device according to the present invention is provided inside the filling liquid passage, and a filling pipe for supplying the filling liquid into the filling liquid passage and the filling liquid in the filling liquid passage. Is provided with a liquid valve for shutting off communication between a liquid injection pipe filling the inside of the container, and a sealing means attached to a valve body constituting the liquid valve to shut off the inside of the filled liquid passage from the outside,
In particular, the entire liquid contact portion of the valve body is formed of the same synthetic resin material, and no gap is formed on the outer surface in contact with the filling liquid.

[0009]

In the above aseptic valve, the entire liquid contact portion of the valve body is made of the same synthetic resin material, and there is no gap open to the side of the filling liquid, so the filling liquid may enter the inside of the valve body. Therefore, it is possible to prevent the propagation of various bacteria.

[0010]

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a vertical cross-sectional view of an aseptic valve of a filling device according to an embodiment of the present invention. A filling liquid passage 1a is formed in a valve housing 1, and the filling liquid passage 1a is formed inside the filling liquid passage 1a.
A liquid valve 2 for opening and closing is provided. Filling liquid passage 1
A liquid supply pipe 4 connected to a filling liquid tank (not shown) is opened above the liquid valve 2 of a, and a liquid injection pipe 6 connected to a filling nozzle (not shown) is opened below the liquid valve 2. is doing. The valve body 8 constituting the liquid valve 2 is connected to a piston rod 10 of a cylinder (not shown) provided above the valve housing 1 to move up and down, and when descending, is seated on the valve seat 1b in the valve housing 1. Then, the liquid supply pipe 4 and the liquid injection pipe 6 are cut off from each other, and when the liquid supply pipe 4 rises, the liquid supply pipe 4 and the liquid injection pipe 6 are communicated with each other to fill the inside of the container.

The valve body 8 has a seal member 12 which is seated on a valve seat 1b formed in the valve housing 1. The seal member 12 has an annular shape made of a synthetic resin material such as Teflon (registered trademark), and a piston rod of a cylinder fixed above the valve housing 1 by a stainless fastening pin 16 penetrating the inside thereof. It is connected to 10 and moved up and down. A bellows 14 is integrally provided on the upper surface of the annular seal member 12. The upper end 14a of the bellows 14 is fitted into the space between the valve housing 1 and the cylinder body 20 above the valve housing 1 via an annular snap ring 22, and the liquid supply pipe 4 and the liquid injection pipe 6 are connected. The inside of the filling liquid passage 1a, which is open, and the outside are blocked by maintaining liquid tightness. Fastening pin 16 connecting the annular seal member 12 to the upper piston rod 10.
A cap 24 that covers the entire fastening pin 16 is provided below
Is installed. Similar to the annular seal member 12, the cap 24 is made of a synthetic resin material such as Teflon, and the outer peripheral edge of the cap 24 and the seal member 12 are formed.
The joint portion 26 with and is welded so that the filling liquid does not enter the joint surface between them and the joint surface between these and the fastening pin 16.

In the aseptic valve of the filling apparatus having the above-mentioned structure, the fastening pin 16 made of stainless steel is housed between the seal member 12 made of Teflon and the cap 24 made of Teflon, and the seal member 12 and the cap 24 are joined together. By welding the outer peripheral side of the joint, these are integrated,
Joint surface between the seal member 12 and the cap 24, fastening pin 1
Since the filling liquid does not enter the joint surface between the seal member 6, the seal member 12, and the cap 24, the aseptic performance of the aseptic valve can be improved. The configuration of the valve body 8 is
The present invention is not limited to the above-mentioned one, and it is sufficient that the liquid contact part of the valve body, that is, the outer surface side in contact with the filling liquid is made of a synthetic resin of the same material, and there is no gap for the filling liquid to enter the inside. Further, in the above-mentioned embodiment, the aseptic valve which is usually used in the weight filler (weight filling device) which controls the opening / closing of the valve while measuring the filling weight to perform the filling of a constant weight is explained. Can also be applied to.

[0013]

As described above, according to the present invention, the liquid contact portion of the liquid valve that opens and closes the filling liquid passage is formed of the same synthetic resin material to eliminate a gap on the outer surface in contact with the filling liquid. Therefore, the filling liquid does not enter the inside of the valve body that constitutes the liquid valve, and the propagation of various bacteria can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an aseptic valve of a filling device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a sterile valve of a conventional filling device.

FIG. 3 is a vertical cross-sectional view showing another example of the aseptic valve of the conventional filling device.

[Explanation of symbols]

 1a Filling liquid passage 2 Liquid valve 4 Liquid supply pipe 6 Injection pipe 8 Valve body

Claims (2)

[Claims] 1. A communication pipe is provided inside the filling liquid passage for supplying a filling liquid into the filling liquid passage and a filling pipe for filling the filling liquid in the filling liquid passage into a container. In the aseptic valve of the filling device, which is equipped with a liquid valve for controlling the liquid valve and a sealing means which is attached to the valve body that constitutes the liquid valve and shuts off the inside of the filling liquid passage from the outside, An aseptic valve for a filling device, which is made of a synthetic resin material and has no gap on the outer surface in contact with the filling liquid. 2. A seal member for seating the valve element on a valve seat provided in a filling liquid passage, a fastening pin for connecting the seal member to a driving means for operating the valve element, and the fastening pin for the seal. 2. The filling device according to claim 1, wherein the sealing device and the cap are fixed to each other by welding a portion of the joint portion between the sealing member and the cap that is in contact with the filling liquid. Aseptic valve.