JPS63248381A - Sterile type discharge valve - Google Patents

Abstract

PURPOSE:To obtain a fluid discharge valve, capable of preventing invasion of various germs to a vessel, having a simple structure and providing sterilizing function, by providing a specific structure to the fluid discharge valve attached to the vessel such as a cultivation vessel. CONSTITUTION:The aimed discharge valve attached to the opening 11 of bottom part of a cultivation vessel is composed of a valve main body 20, a valve rod 25 capable of reciprocating in the valve, a driving device 27 for reciprocating the rod 25, a main body seal valve 26 of the tip part of the valve rod 25, a valve seat 24 provided inside the valve main body 20, an outer vessel seal valve 29 capable of placing opposite to the main body seal valve 26, an elastomer 34 for pressing the outer seal valve 29 to the valve seat 24 and a projection 35 for separating the outer vessel seal 29 from the valve seat 24.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sterile discharge valve, and particularly to a sterile discharge valve that is suitable for withdrawing fluid from a culture tank, etc., which has a sterile interior and prevents invasion of germs. This relates to a type discharge valve.

[Conventional technology]

Conventionally, in a culture tank, etc., a discharge valve for drawing out fluid from the tank is provided at the bottom of the tank, and the outlet piping of the discharge valve is provided with a valve to prevent the intrusion of various germs. , steam piping and valves are provided to sterilize the piping.

Incidentally, related devices of this type include, for example, Japanese Patent Publication No. 56-12105, Japanese Patent Publication No. 56-51760, and the like.

- It is necessary to make the piping as short as possible in order to flow the liquid into the process line, which poses a problem in that the configuration around the bottom of the tank becomes complicated in terms of space. In addition, there are problems such as complicated and difficult valve operation, such as sterilizing the discharge valve and the inside of the tank separately, and problems such as steam condensed water accumulating in the piping section to distribute steam to the process line. There is.

An object of the present invention is to provide a sterile discharge valve that can simplify the area around the bottom of the tank by providing a single valve with the functions of removing fluid from the tank, preventing the intrusion of germs, and sterilizing the tank.

[Means for solving problems]

The above object is to provide a discharge valve with a valve body provided in a tank whose interior is sterilized, a valve body having a hole communicating with the tank and a discharge port, and a valve body provided in the valve body so as to be movable back and forth. A valve stem, a drive device that reciprocates the valve stem, a main body seal valve provided on the valve stem so as to be able to close the hole, and a position between the hole and the discharge port in the valve body. a valve seat protruding inward; an external tank seal valve provided on the opposite side of the valve seat from the main body seal valve so as to be slidable on the valve stem and seated on the valve seat; An elastic body that presses the outer seal valve against the valve seat, and a protrusion provided on the valve stem so as to be engageable with the tank outer seal valve between the main body seal valve and the tank outer seal valve. This is achieved by making it a reality.

[For production]

A driving device moves the valve stem in a direction in which the body seal valve moves toward the hole. During such movement of the valve stem, the engagement between the protrusion and the external tank seal valve is released, whereby the external tank seal valve is pressed against the valve seat by the elastic body and is seated. At this point, movement of the valve stem by the drive device is stopped;
The space between the hole in the valve body and the seal valve outside the tank is in communication with the inside of the tank via the hole. When the inside of the tank is sterilized in this state, the space is also sterilized at the same time. After that, when the valve stem is further moved by the driving device in the direction in which the main body seal valve moves toward the hole, the hole is closed by the main body seal valve, and as a result, the entire valve is sterilized and the valve is released into the tank. #
Invasion of bacteria is prevented. In addition, when the valve stem is moved in the opposite direction to the above direction by the drive device from this state, the hole is first unblocked by the main body seal valve, and then the tank outer seal is engaged by the engagement of the protrusion with the tank outer seal valve. The valve is unseated. As a result, the fluid in the tank is extracted from the discharge port through the hole and the inside of the valve body.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, a valve mounting opening 11 and a flange 12 are provided at, for example, the bottom of a tank IO such as a culture tank. A hole 21 is provided in the valve body 20, in this case on the top surface. A flange 22 is provided on the side wall of the valve body 20 at a position where the top surface corresponds to the depth of the valve mounting opening ti and faces the flange 11. A discharge port 23 is provided in the side wall of the valve body 20 at a position below the flange 22.
is provided in communication with the inside of the valve body 20. Valve body 20
Inside, a valve seat 24 is provided to protrude inward at a position above the opening position of the discharge port 23 . In this case, a valve stem 25 is provided within the valve body 20 so as to be movable up and down. A main body seal valve 26 is provided at the top end of the valve stem 25 in this case so as to be able to close the hole 21 . In this case, the lower end of the valve stem 25 that protrudes outside the valve body 20 is provided in a drive device 27 . A gap between the outer peripheral surface of the valve stem 25 and the bottom of the valve body 20 is sealed by a gland seal 28. An external tank seal valve 29 is provided on the valve stem 25 on the side opposite to the main body seal valve 26 with respect to the valve seat 24 so as to be slidable and seated on the valve seat 24 . An O-ring 30 is fitted around the sliding portion of the external tank seal valve 29. In this case, with the external seal valve 29 seated on the valve seat 24, the inside of the valve body 20 is
The upper space 31 and the lower space 32 are separated and independent.

The valve stem 25 is located below the outer tank seal valve 29.

Additionally, a spring seat 33 is provided within the lower space 32. In this case, a coil spring 34 is stretched between the tank outer seal valve 29 and the spring seat 33. Valve stem 2
A protrusion 35 is provided on the 5-ring at a position between the main body seal valve 26 and the outer tank seal valve 29 and at a position that can be engaged with the outer tank seal valve 29. The protrusion 35 has a size and shape that allows it to pass through the valve seat 24. In this state, the valve body 20 has its upper side connected to the upper side wall and the valve mounting opening 11.
By being inserted into the valve mounting volume 011 in correspondence with the side wall and bolting the flange 12.22, in this case,
It is provided at the bottom of tank 10. In addition, the discharge port 23 has a pipe 4
0 is concatenated.

In FIG. 1, the valve stem 25 is lowered by a drive 27. In FIG. As a result, the closure of the hole 21 by the main body seal valve 26 is first released. Thereafter, as the valve rod 25 further descends, the protrusion 35 is engaged with the tank outer seal valve 29. As a result, the outer tank seal valve 29 is activated by the coil spring 3.
4, the external seal valve 29 is released from being seated on the valve seat 24. After that, the drive device 27
operation is stopped and this state is maintained. In this state, the fluid in the tank 10 is extracted from the discharge port 23 through the hole 21, the upper space 31, the valve seat 24, and the lower space 32 in this order, enters the pipe 40, and is taken out of the system. After that, tank 10
When the inside is sterilized, for example, with steam, the valve stem 25 in the above state is raised by the drive device 27.

Due to this.

The +6 outer seal valve 29 is pushed toward the valve seat 24 by the spring force of the coil spring 34, and is finally released.

It is pressed against the valve seat 24 and is seated. At this point, the operation of the drive device 27 is stopped and this state is maintained. In other words, when the external seal valve 29 is seated on the valve seat 24, the upper space 31 and the lower space 32 are separated and independent, and the space 31 is communicated with the inside of the tank 10 through the hole 21. be.

In this state, the inside of the tank IO is sterilized by steam. At the same time, steam enters the upper space 31 from inside the tank 10 through the hole 21, thereby causing the steam to enter the upper space 31 through the hole 21.
After all the parts in the valve are sterilized, the valve stem 25 is raised further by the drive 27. Due to this rise, the hole 2L is closed by the main body seal valve 26. Upon completion of this closing, the operation of the drive device 27 is stopped and this state is maintained.

In this embodiment, the following first-order effects can be obtained.

(1) Since a single valve has the functions of removing fluid from the tank, preventing the intrusion of germs, and sterilizing, piping for flowing sterilizing steam into the process line can be eliminated and the bottom of the tank can be simplified.

(2) The discharge valve and the inside of the tank can be sterilized at the same time.

Valve operation can be simplified and facilitated.

(3) Steam condensed water can be prevented from accumulating.

(4) One discharge valve has two valve seat surfaces, and fluid leakage within the tank can be sufficiently prevented.

If the fluid is a liquid, the amount of liquid drawn into the upper space, which is separated and independent from the lower space, is detected (for example, the liquid level), and when the detected amount reaches a predetermined amount, the liquid is discharged into the upper space. The extraction may be stopped and the liquid may be extracted from the discharge port through the lower space.

〔Effect of the invention〕

According to the present invention, one valve has the functions of extracting fluid from the tank, preventing invasion of germs, and sterilizing the tank, and therefore has the effect of simplifying the area around the bottom of the tank.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an aseptic discharge valve according to an embodiment of the present invention. 10------One tank, 20---One valve body, 21-
-----One hole, 23---One discharge port, 24---One valve seat.

Claims (1)

[Claims] 1. A valve body provided in a tank whose interior is sterilized and having a hole communicating with the inside of the tank and a discharge port, a valve stem reciprocably provided in the valve body, and the valve. a driving device for reciprocating a rod; a main body seal valve provided on the valve stem so as to be able to close the hole; a valve seat, an external tank seal valve that is provided to be slidable on the valve stem on the opposite side of the valve seat from the main body seal valve and to be seated on the valve seat; It is characterized by comprising an elastic body that presses against the valve seat, and a protrusion provided on the valve stem so as to be able to engage with the tank outer seal valve between the main body seal valve and the tank outer seal valve. Aseptic discharge valve.