JPH02304277A - Sealing mechanism for multipoint line automatic switching device of liquid treating plant - Google Patents

Abstract

PURPOSE:To eliminate falling of a seal packing and facilitate exchange by comprising a sealing part having a poppet-shape section in a seal packing having a L-shape section, and pinching a radially bent piece between the tip of a connecting pipe and a packing holder. CONSTITUTION:Since a radially bent piece 39a of a seal packing 39 having a L-shape section is pinched between the tips of connecting pipes 17a, 17b and a packing holder 38, falling of the seal packing 39 to be caused by opening a pipeline connecting part is perfectly prevented even if the viscosity and the inline pressure are high. Since a sealing part 41 having a poppet-shape section formed in the tip of an axially bent piece 39b prevents the dislocation of the tip of the packing 39 in the circular direction at the time of connection or the like and seals the pipeline connecting part securely, leakage of the liquid in the pipeline connecting part is prevented. Since the seal packing 39 can be removed by removing the packing holder 38, exchange is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sealing mechanism for an automatic multi-point pipe switching device in a liquid processing plant for foods, medicines, etc.

[Prior Art] In liquid processing plants for foods, medicines, etc., pipes need to be cleaned and sterilized with cleaning liquid, steam, etc. on a regular basis or as needed. The connections of the channels are switched to supply cleaning liquid and steam.

As a switching device for the above-mentioned multi-point pipeline, 1, for example,
No. 35309 and Japanese Patent Publication No. 50-1089 have been proposed, but when a pipe connection is opened for pipe switching, the seal packing that seals the connection may fall off. This is noticeable when the liquid is viscous or the pressure inside the pipe is high, and it is not only time-consuming to manually reinstall the seal gasket that has fallen off, but also causes secondary infection of the processed liquid with microorganisms when the human body comes into contact with it. This is not desirable in liquid plants that handle chemicals and chemicals.

Furthermore, since leakage from the conduit connection may similarly lead to secondary microbial infection, it is desirable that a seal gasket that has become incompletely sealed can be easily replaced.

[Problems to be Solved by the Invention] It is an object to be solved by the present invention to provide a sealing mechanism for a multi-point pipe switching device in which the seal portion does not fall off and is easy to replace.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a fixing plate to which a plurality of pipes constituting a multi-point conduit are attached, and a U-shaped plate that opens opposite to the openings of these pipes. a rocking plate to which a connecting pipe is attached, and a drive unit for linearly reciprocating and rotationally rocking the rocking plate with respect to the fixed plate, the rocking plate having a linear reciprocating motion and rotary rocking relative to the fixed plate. In a multi-point pipe automatic switching device in a liquid processing plant that switches the connection of multi-point pipes by
A seal gasket having an angular cross-section for sealing the pipe connection portion includes a seal portion having a mushroom-shaped cross section for sealing the connection portion of the pipe opposite to the tip of the axially bent piece; is sandwiched between the tip of the connecting tube and a packing holder screwed onto the connecting tube.

[Function] The radially bent piece of the seal packing, which has an angled cross-section, is held between the tip of the connecting pipe and the packing holder, so even if the viscosity of the liquid to be processed or the internal pressure of the pipe is high, the pipe connection can be maintained. It is possible to completely prevent the seal packing from falling off due to opening of the part. The mushroom-shaped seal section formed at the tip of the axially bent piece prevents the tip of the packing from shifting in the circumferential direction during connections, etc., and reliably seals the pipe connection. It is possible to prevent liquid leakage in the parts.

Furthermore, since the seal packing can be removed by removing the packing holder, its replacement is easy.

[Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 6 show embodiments of the present invention.

This multi-point pipe automatic switching device has a switching section 1 which switches the connection of pipes. A drive unit 2 that drives the switching unit l, a cleaning device 3 that cleans drips from the pipe connection, a sealing mechanism 4 that seals the pipe connection, and a leakage detection device 5 that detects leakage in the sealing mechanism 4. a position detection device that detects the position of the switching unit l;
and a control device 7 that controls these operations.

On the fixed plate 10 in the switching section l, one ends of a plurality of pipes 11a, llb, Ilc, and lid constituting a multipoint conduit are attached concentrically and at equal intervals in the circumferential direction,
The bent other ends of the pipes 11a to lid open in pairs facing each other, and pipes for food, medicine, etc. (not shown) are connected to these other end openings.

A swing shaft 13 is attached to the cylinder 12 fixed to the center portion of the fixed plate 10 so as to be capable of linear reciprocating motion and rotational swing by a bearing 14, and the center portion is fixed to one end of the swing shaft 13. A pair of U-shaped connecting pipes 17a are opened on the rocking plate 16 facing the openings of the pipes 11a to lid.

17b is attached.

The mounting plate 20a connected to the cylindrical body 12, the mounting plate 20b installed at an axial distance from the mounting plate 20a, and the frame 21 connecting these plates constitute a support part of the multipoint pipe switching device. , the fluid pressure cylinder 23 is mounted on the mounting plate 20a, and the fluid pressure cylinder 23 is mounted on the mounting plate 2Q.
A swing actuator 24 is fixed to each of the slide keys 25 . Parallel key 27 and coupling 26
are connected to allow integral rocking and relative reciprocating motion.
The door 23a and the swing shaft 13 are.

They are connected by a taba bin 28 so that they can swing together and move back and forth. Additionally, a fluid pressure cylinder 23 is attached to the frame 21.
A cover 29 that covers the swing actuator is attached to the mounting plate 20b, and a cover 30 that covers the swing actuator 24 is attached to the mounting plate 20b.

In the driving unit 2, when pressure fluid is supplied to the fluid pressure cylinder 23, the swing plate 16 is moved away from the fixed plate 10, and when pressure fluid is supplied to the swing actuator 24, the swing plate 1B is moved away from the fixed plate lO. Rotate and oscillate.

Washing? JM3 includes a coupler 33 screwed onto one end of the swing shaft 13, and 4! ! A plurality of nozzles 34 opened in the radial direction of the moving shaft 13. The cleaning liquid supplied to the coupler 33 by a cleaning liquid supply pipe (not shown) is supplied to the nozzle 34.
．． -- is ejected for a certain period of time toward the connection between the pipes 11a to lid and 17a and 17b to clean drips caused by the opening of the pipe connections.

The sealing mechanism 4 includes a sealing packing 39. which has an L-shaped cross section and has a bent piece 39a in the radial direction held between connecting pipes 17a, 17b and packing holders 3B, which are screwed onto the outer peripheries of these fittings. ..., and a connecting pipe 17a.

17b and packing holder 38. Gasket 4 between...
0, #boiled sealed, above seal seal 38°...
The bent piece Hb in the axial direction has a sealing part 41 at the tip for sealing the connection part with the pipes 11a to 11d.
A widening taper is formed in the opening of the ld in order to eliminate the accumulation of liquid.

The above seal packing 38. The fist is a radial bent piece 39
Since the ends of the connecting pipes 17a and 17b and the packing holder 38, Φ. The path connection portion is an axially bent piece 3!3b
Seal part 4 at the tip! sealed by.

In addition, if leakage occurs due to aging etc., please use the packing holder 38.
．． It can be easily replaced by removing...

A swing plate 18 and a connecting pipe 1 are provided on the outer peripheral surface of the fixed plate 10.
A cover 45 covering 7a, 17b tt is removably attached.

The cover 45 works together with the fixed plate 10 to prevent the cleaning liquid ejected from the cleaning device 3 from scattering to the drive unit 2, and when the connection between the pipes 11a = 11d and 17a and 17b is opened, the processing liquid is exposed to the outside air. This is to prevent secondary contamination by microorganisms due to contact with workers, etc., and includes a drain 45a, a liquid collection groove 45b that collects leaked liquid, and a leakage detection sensor 48 that detects liquid leakage near the drain 45a. etc.

The swing plate 1B has a rod 51 forming a position detection mechanism on the surface facing the fixed plate lO, and the fixed plate 10 has a rod 51.
The stopper blocks 52.52 that the stopper blocks 52.
By coming into contact with 52, the rotational swing position of the swing plate 1B is regulated. Further, the linear reciprocating position of the swing plate 16 is controlled by a pair of proximity switches 55, 55 fixed to the fixed plate lO by the mounting member 54, and the rotational swing position is controlled by a proximity switch mounted on the swing actuator 24. 56.
56 (see FIG. 6). Note that the proximity switches 55, 55 are of a completely waterproof type that will not cause any problem even if cleaning liquid or the like is splashed.

The control device 7 includes a first directional switching valve 81.4g that supplies and discharges compressed air from the air source 60 to and from the fluid pressure cylinder 23, and a second directional switching valve B that supplies and discharges the compressed air to and from the dynamic actuator 24.
2. An on-off valve 63 in a flow path that communicates the outlet boat of the WIJ1 direction switching valve 61 with a pressure chamber that drives the rod 23a of the fluid pressure cylinder 23 in the opening direction of the swing plate 16, air a60, and the first direction switching A check valve 64 that prevents compressed air from flowing back from the first directional valve 61 to the air source 60 in the flow path that communicates with the inlet port of the valve St, and an on-off valve 65 that supplies cleaning water. and a speed controller 88.88° 87.87 in a flow path that communicates the outlet ports of the first directional valve 61 and the second directional valve B2 with the fluid pressure cylinder 23 and the swing actuator 24, The first and second directional valves 81 and 62 are configured as center-closed types in which all boats are closed in the neutral position, and these valves 81 to 63 and 85 are program-controlled by a control panel 68. .

Next, the operation of the above embodiment will be explained with reference to FIG.

When the solenoid Ella of the first directional valve 81 is energized by an electric signal from the control panel 68, the fluid pressure cylinder 23
The rod 23a moves to the left in FIG.
is separated from the fixed plate 10.

When the proximity switch 55 confirms that the swing plate 16 is separated, the solenoid Ha of the on-off valve 83 is energized and the solenoid 61a is de-energized, and the compressed air that has driven the fluid pressure cylinder 23 is discharged to the outside. When the solenoid e2a of the second directional control valve 62 is excited and the swing actuator 24 is rotated, the swing shaft 13 and the swing plate 1 are rotated.
6 rotates about 90 degrees with respect to the fixed plate 10.

When the proximity switch 56 confirms the rotational oscillation position of the oscillation plate 16, the excitation of the solenoid Et2a is released and the second directional switching valve 82 returns to the neutral position.

After the second directional switching valve 62 returns to the neutral position, when the solenoid Blb of the first directional switching valve 61 is energized, the rods 23a and 7g of the hydraulic cylinder 23, the moving shaft 13, and the swing plate 16 move to the right in the figure. , the line connection whose connection position has been switched is closed.

Thereafter, the solenoid 85a of the on-off valve 65 is energized to open the nozzle 34. A cleaning liquid is ejected from the drain 45a of the cover 45, and the dripping caused by the opening of the pipe connection is cleaned for a specified time using a timer or the like, and the cleaning liquid is discharged from the drain 45a of the cover 45. After the specified time has elapsed, the cleaning is stopped by de-energizing the solenoid 85a.

After switching the pipes and cleaning drippings in this manner, cleaning liquid, steam, etc. are supplied from the pipes connected to the pipes 11a''lld, etc., and the pipes are cleaned and sterilized.

[Effects of the Invention] The sealing mechanism of the multi-point pipe automatic switching device in a liquid processing plant of the present invention connects a connecting pipe and a radially bent piece of a seal packing having a cross-sectional shape to IJ! By holding the seal in the first seal holder, the seal will not fall off even if the pipe connection is opened, completely preventing seal failure, secondary microorganisms, and infection caused by the seal seal falling off. be able to.

Further, since the seal packing can be easily removed by removing the packing holder, its replacement is easy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the main part of an embodiment of the present invention, FIG. 2 is a partially cutaway side view, and FIGS. 3 and 4 are A--A in FIG. 2.
A and BB sectional views, FIG. 5 is an enlarged sectional view of the sealing mechanism, and FIG. 6 is a configuration diagram of the control device. 2. Drive unit, 4. Seal mechanism. 10--Fixing plate, lla-1id a *
tube. 16... Rocking plate, 17a, 17b * * Connection pipe. 38...Par, Kin holder, 39411 Seal packing, 39a, 313b @ number bent piece, 41--Seal part. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A fixed plate to which a plurality of pipes constituting a multipoint pipe line are attached;
The above-mentioned rocking plate includes a rocking plate to which a U-shaped connecting pipe is attached that opens opposite to the openings of these pipes, and a drive unit that linearly reciprocates and rotates the rocking plate with respect to the fixed plate. In a multi-point pipe automatic switching device in a liquid processing plant that switches the connections of multi-point pipe lines by linear reciprocating motion and rotational oscillation of a moving plate with respect to a fixed plate, a seal packing having an L-shaped cross section that seals the pipe connection part is used. , the radially bent piece of the seal packing is provided with a seal part having a mushroom-shaped cross section for sealing the connecting part of the pipe opposite to the tip of the axially bent piece, and the radially bent piece of the seal packing is screwed to the tip of the connecting pipe and the connecting pipe. A sealing mechanism in a multi-point pipe automatic switching device for a liquid processing plant, characterized in that the sealing mechanism is held between holders.