JPH0249996B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] A container guided from an inlet star wheel is placed on a container platform and raised, the container opening is pressed against a container sealing member provided on a valve block of a filling device, and the container is placed on a counter. The liquid in the pressure tank under pressure is filled into a container that is counter-pressurized by pressurized gas, while replacing the pressurized gas in the container, and after filling the liquid, the pressure inside the container is reduced to atmospheric pressure. The present invention relates to a cleaning device for a back pressure type liquid filling device.

[Conventional technology]

A conventional device of this kind will be explained based on FIGS. 1 to 3.

In the figure, 1 is a liquid tank, 2 is a filling pipe, 3 is a liquid valve that opens and closes a liquid passage 5 formed in a valve block 4 so as to communicate between the liquid tank 1 and the filling pipe 2, and 6 is a valve block 4. A spring provided between the liquid valves 3 acts to bias the liquid valves 3 upward.
Reference numeral 7 denotes a counter pressurized gas passage, which communicates with the upper part of the liquid tank 1 and is provided with a counter valve 8 having connection ports a, b, and c in the middle, and the counter pressurized gas passage 7 is blocked by the rise of the liquid at the lower part. Hold the float ball 9.

10 is a pipe having an orifice 11, and is provided between the base of the filling pipe 2 and the connection port c of the counter valve 8. 12 is a pipe provided with a flow control valve 13 and a snift valve 14 having connection ports d, e, and f, one end of which opens at the lower end surface of the valve block 4;
The other end is connected to the counter pressurized gas passage 7 between the counter valve 8 and the float bowl 9. 17 is a pipe having an orifice 18, one end of which is connected to the manifold 1.
9, and the other end is connected to the pipe 12 between the flow control valve 13 and the snift valve 14. 29 is a pipe having an orifice 30 having a larger throttling resistance than the orifice 18, and one end is connected to the connection port f of the flow control valve 13.
The other end is connected to the pipe 17 between the orifice 18 and the manifold 19, respectively. 15 is a pin provided on the valve block 4, and 16 is a cleaning device detachably attached to the pin 15. Numeral 20 is a container sealing member which is held movable up and down by means not shown and is pressed against the valve block 4 when the container platform 21 completes its upward stroke with the cleaning device 16 being held by the valve block 4. 2
2 is a rod that is moved up and down by means not shown.

The liquid valve 3 is normally closed as shown in Fig. 1 so that the pressure difference between the internal pressure of the liquid tank 1 and the atmospheric pressure inside the filling pipe 2 overcomes the force of the spring 6 and isolates the gap between the liquid tank 1 and the filling pipe 2. There is.

Note that each valve is opened and closed by mechanical means (not shown).

As shown in FIG. 2, the cleaning device 16 has a springy clamp 23 at its upper end, and when it is held by the pin 15, the upper opening of the clamp 23 is pushed wide (pin 15 diameter>upper opening). 23
into pin 15.

In FIG. 3, 24 is a filling machine, 25 is a conveyor, 26 is a guide, 27 is an inlet star wheel,
28 is a transfer star wheel. After the container filling work is completed, the filling liquid is collected from the lower part of the liquid tank 1 to a filling liquid recovery tank (not shown), and then fresh water is supplied to the liquid tank 1 through the liquid passage 5, counter pressurized gas passage 7, etc. Drain and rinse.
Next, attach the cleaning device 16 to the valve block 4 with pin 1.
After the liquid tank 1 is filled with the cleaning liquid by operating the pump (not shown) and supplying the cleaning liquid from the cleaning tank (not shown) to the liquid tank 1, the filling machine is operated to start the cleaning work.

First, the container platform 21 is raised and the purification device 16 is sealed, and at the same time the counter valve 8 is opened between a and b (d and f of the flow rate control valve 13,
The snift valve 14 and the space between e and f are always open except for the space between r and q in FIG. 3, which will be described later. ) The cleaning liquid flows into the cleaning device 16 via the liquid tank 1 , the counter pressurized gas passage 7 and the piping 12 . (A portion of the cleaning liquid is also sent to pipes 17 and 29).

After the gap between a and b of the counter valve 8 is opened, the rod 22 is lifted by means not shown, and the liquid valve 3 is raised by the action of the spring 6, and the liquid tank 1 and the filling pipe 2 are communicated with each other, and the cleaning liquid is discharged. The liquid flows into the cleaning device 16 via the liquid tank 1, the liquid passage 5, and the filling pipe 2.
The cleaning liquid rising inside the cleaning device 16 flows into the pipe 12, flows through the pipes 17 and 29, and flows into the manifold 19 while being throttled by the orifices 18 and 30. The cleaning liquid that has flowed into the manifold 19 is returned to the liquid tank 1 via a cleaning tank (not shown) and a pump.
flows into.

Next, before the container platform 21 starts to descend, the counter valve 8 is switched, the gap between a and b is closed, and the gap between a and c is opened, and the cleaning liquid in the counter pressurized gas passage 7 is transferred to the pipe 1.
0, the rod 22 is pushed down, the liquid valve 3 is lowered, and the connection between the liquid tank 1 and the filling pipe 2 is cut off, thereby cleaning the pipe 10. Incidentally, in the region r-q in FIG. 3, that is, at the lowest position of the container platform 21, all of the above-mentioned valves are closed.

Washing is repeated in the above manner.

[Problem to be solved by the invention]

However, the conventional device described above had the following problems.

(1) The cleaning device 16 is held suspended from the pin 15 in a natural state when the container platform 21 is lowered and is not in contact with the cleaning device 16. Therefore, between the valve block 4 and the seal member 20,
Alternatively, a gap is formed between the seal member 20 and the cleaning device 16, and the valve as a whole no longer has a sealed structure. Therefore, it is impossible to recycle the cleaning liquid while the container platform 21 is descending during one rotation of the filling machine, and during this period, the liquid valve 3, counter valve 8, flow rate control valve 13, and Snitt valve 14 are closed. There is. Therefore, the circuit cannot be cleaned, the efficiency is poor, and when a gap occurs, the cleaning liquid may spill out of the cleaning device 16 from the gap, which is undesirable.

(2) The cleaning liquid goes from the liquid tank 1 through the counter pressurized gas passage 7 to the piping 12, 17, 29 or the piping 10, or through the liquid tank 1, the liquid passage 5, and the cleaning device 16 to the piping 12, 29, 17. Finally, it passes through the orifices 18 and 30 and flows into the manifold 19, but the cross-sectional area of the liquid passage 5,
Flow passage cross-sectional area of counter pressurized gas passage 7, piping 1
The cross-sectional area of channels 2, 17, 29 etc. is orifice 1.
Approximately 900 to 1200 times and approximately 60 times compared to 8 and 30, respectively.
~100 times, about 20 to 30 times, and on the other hand, the flow rate of the cleaning liquid is substantially determined by the amount of restriction of the orifices 18 and 30 and is kept low, so the flow speeds in the liquid passage 5 and the counter pressurized gas passage 7 are extremely low. , the flow becomes a laminar flow with a boundary layer, and the flow stagnates on the inner wall, making it impossible to sufficiently clean the inner wall surface.

[Means to solve the problem]

The present invention has been made in view of the above-mentioned conventional problems, and includes a container sealing member that allows a container guided from an inlet star wheel to be placed on a container platform and raised, and that the container opening is provided in a valve block of a filling device. and fill the liquid in the pressure tank under counter pressure into the counter pressurized container with pressurized gas while displacing the pressurized gas in the container,
In a cleaning device for a reverse-pressure liquid filling device that reduces the pressure inside the container to atmospheric pressure after filling the liquid, a cleaning liquid chamber and a lower chamber communicating with the liquid chamber are formed to separate the cleaning device main body and the cleaning device main body. A clamp part provided at the upper part and detachable from the valve block of the filling device; and an inner cylinder slidably provided in the upper interior of the cleaning device main body and tightly attached to the container sealing member when the cleaning device main body is clamped to the filling device. a rod provided at the bottom of the cleaning device main body that contacts the container platform of the filling device and moves up and down as the rod rises and falls to interrupt and communicate the cleaning liquid chamber and the lower chamber; and a rod connected to the lower chamber that connects the cleaning liquid This is a cleaning device for a back pressure type liquid filling device, which is equipped with a cleaning pipe for discharging liquid.

[Effect]

According to the present invention constructed in this manner, the main body of the cleaning device can be attached in close contact with the container seal provided on the valve block of the filling device, and cleaning is possible when the container platform of the filling machine is lowered, which was conventionally impossible. The cleaning solution can be reliably circulated even if the cleaning solution is not used. In addition, as the container platform moves up and down, the cleaning liquid chamber and its lower chamber can be shut off, and the passing rod can be moved up and down to change the flow of the cleaning liquid, allowing the cleaning liquid to flow actively from the bottom of the main body of the cleaning device. The lower part of the filling machine can also be thoroughly cleaned.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 4 and 5. Incidentally, the same parts as those of the conventional one are given the same reference numerals, and the explanation will focus on the differences.

In the figure, 31 is a manifold, 50 is a cleaning device, and the cleaning device 50 is a cleaning liquid chamber 50.
a, Lower small chamber 50b and hole 51 communicating with the liquid chamber
a, 51b, a clamp 52 formed at the upper end of the main body 51, a cylinder 53 that circumscribes the inner wall of the main body 51 and is slidable, a cylinder 53 provided between the main body 51 and the inner cylinder 53, and a clamp 52 that moves the inner cylinder 53 upward. A spring 54 that acts to bias the main body 51, a rod 55 that passes through the lower end of the main body 51 and is movable up and down, and connects and disconnects the liquid chamber 50a and the small chamber 50b, and is provided between the main body 51 and the rod 55, and connects the rod 55 to the main body. It is composed of a spring 56 that acts to press against the lower end, φ rings 57 and 58, and a cleaning pipe 59 that communicates with a hole 51b provided in the lower side wall of the main body 51. One end of the cleaning pipe 59 is flexibly connected to the main body 51, and the other end has a one-touch joint so that it can be connected to the manifold 31.

After the container filling operation is completed, the process of recovering the filling liquid from the liquid tank 1 and rinsing it with clean water is the same as the conventional process described above. The clamp 52 is held on the pin 15 and the cleaning device 50 is held on the valve block 4. In this state, the inner cylinder 53 is pressed against the seal member 20 and is in close contact with it. Further, the cleaning pipe 59 and the manifold 31 are connected. Next, a pump (not shown) is operated to supply cleaning liquid from a cleaning tank (not shown) to the liquid tank 1, and after filling the liquid tank 1 with the cleaning liquid, the filling machine is operated to start the cleaning work.

Before the upward stroke of the container platform 21 (details will be described later), the counter valve 8 is connected between a and b (the flow rate control valve 13 between d and e, between d and f, and between ef and the snift valve 14 is ) is open (closed between a and c) during cleaning, and the cleaning liquid is supplied to the liquid tank 1, counter pressurized gas passage 7, and piping 1.
2 into the liquid chamber 50a of the cleaning device 50. (A portion of the cleaning liquid is also sent to pipes 17 and 29). When the container platform 21 has finished rising, the rod 5
5 is placed in the hole 51 by the container mounting stand 21 against the spring 56.
a and closes the hole 51a.

Next, the rod 22 is lifted by a means not shown, and the liquid valve 3 is raised by the action of the spring 6, so that the liquid tank 1 and the filling pipe 2 are communicated, and the cleaning liquid is passed through the liquid tank 1, the liquid passage 5, and the filling pipe 2. The liquid flows into the liquid chamber 50a of the cleaning device 50. Liquid chamber 50 of cleaning device 50
The cleaning liquid that has risen inside a flows into the pipe 12 and is squeezed by the orifices 18 and 30, and then flows into the pipes 17 and 2.
9 and flows into the manifold 31. In this valve state, the cleaning liquid flows while being throttled by the orifices 18 and 30, so the flow rate is small and the flow velocity in the flow path 5 is almost non-existent. The cleaning liquid that has flowed into the manifold 31 flows back into the liquid tank 1 via a cleaning tank and a pump (not shown).

Next, as the container platform 21 is lowered, the rod 55
is pushed down by the pressure of the spring 56 and the cleaning liquid, and the cleaning liquid in the liquid chamber 50a of the cleaning device 50 flows into the hole 51.
a, the lower chamber 50b, the hole 51b, and the water flows into the manifold 31 through the cleaning pipe 59. In this state, the passage of the cleaning piping 59 has much lower resistance than the passage of the piping 17, so a large flow of cleaning liquid flows from the liquid tank 1 through the liquid passage 5, the injection pipe 2, and the cleaning piping 59. These passageways are cleaned.
(approximately 20 to 25 times the flow rate in the passage of piping 17) After a certain period of time, the liquid valve 3 is lowered by the rod 22 being pushed down before the container platform 21 starts to rise again, and the liquid tank 1 is filled. The pipes 2 are cut off. Before the liquid valve 3 is shut off as described above, the counter valve 8 is switched to close between a and b and open between a and c, and the cleaning liquid in the counter pressurized gas passage 7 is transferred to the pipe 10.
flows into. When the liquid valve 3 is closed in this state, the cleaning liquid flows into the manifold 31 through the pipes 7 and 10, the injection pipe 2, and the pipe 59, and cleans the pipe 10. After cleaning the piping 10, the counter valve 8 is switched again, opening between a and b and closing between a and c, and most of the cleaning liquid in the counter pressurized gas passage 7 flows into the manifold 31 through the cleaning piping 59. do.
The flow rate in this case is about eight times the flow rate of the pipe 17, and the pipe 7 is cleaned in this state. After such cleaning is performed, the container mounting table 2
1 rises again and the washing is repeated.

According to the embodiments described above, the following effects can be obtained.

(1) When the container platform 21 is lowered and is not in contact with the cleaning device 50, the cleaning device 50 maintains the fluid pressure and the spring 5.
4, it is held in a downwardly pressed state against the pin 15. In addition, the inner cylinder 53 has a spring 5
4 and the fluid pressure applied to A shown in FIG. The recycling of the cleaning liquid can be continued even during the washing process, improving the cleaning efficiency and eliminating the problem of the cleaning liquid spilling outside the cleaning device since no gaps are created.

(2) Conventionally, the section where cleaning was interrupted, that is, the container platform 21 and the cleaning device 5 due to the lowering of the container platform 21
In the section where 0 is not in contact, the cleaning liquid bypasses the orifices 18 and 30 and flows into the manifold 31 through the hole 51a with a large flow passage cross-sectional area, the lower chamber 50b, the hole 51b, and the cleaning pipe 59. The flow rate of the cleaning liquid flowing through the liquid passage 5, the filling pipe 2, and the counter pressurized gas passage 7 increases, the boundary layer conventionally formed on the inner wall surface disappears, and the inner wall surface is sufficiently cleaned.

〔Effect of the invention〕

As described above, according to the present invention, the filling pipe section can be cleaned with a large volume of cleaning liquid while the container platform is lowering during one rotation of the filling machine, which was previously impossible to clean. Regardless of the method, the entire filling device can be efficiently and reliably cleaned, which is an excellent effect.

[Brief explanation of the drawing]

Figures 1 to 3 are views showing the conventional type, with Figure 1 being a sectional view showing the cleaning device held in the filling valve, Figure 2 being a view in the direction of arrow A in Figure 1; Figure 4 is a schematic plan view of the filling machine, Figures 4 and 5 are views showing one embodiment of the present invention, Figure 4 is a sectional view showing the cleaning device held in the filling valve, and Figure 5 is a cross-sectional view showing the cleaning device held in the filling valve. is a view taken along arrow B in FIG. 4: valve block, 15: pin, 31: manifold, 50: cleaning device, 50a: cleaning liquid chamber,
50b: Lower chamber, 51: Cleaning device main body, 51
a, 51b: hole, 52: clamp part, 53: inner cylinder, 54: spring, 55: rod, 56: spring, 5
7, 58: φ ring, 59: cleaning piping.

Claims (1)

[Claims] 1 Place the container guided from the inlet star wheel on the container platform and raise it, press the container mouth against the container sealing member provided on the valve block of the filling device,
The liquid in the pressure tank under counter pressure is filled into the counter pressurized container with pressurized gas while replacing the pressurized gas in the container, and after filling the liquid, the inside of the container is brought to atmospheric pressure. In a cleaning device for a back pressure type liquid filling device designed to reduce pressure, the cleaning device main body has a cleaning liquid chamber and a lower small chamber communicating with the liquid chamber, and a valve block of the filling device provided at the upper part of the cleaning device main body can be attached and detached. an inner cylinder that is slidably provided in the upper interior of the cleaning device main body and comes into close contact with the container sealing member when the cleaning device main body is clamped to the filling device; and an inner cylinder provided in the lower part of the cleaning device main body. The rod is provided with a rod that comes into contact with the container platform of the filling device and moves up and down as the rod rises and lowers to interrupt and communicate the cleaning liquid chamber and the lower chamber, and a cleaning pipe that is connected to the lower chamber and discharges the cleaning liquid. A cleaning device for a back pressure type liquid filling device.