JP2007290743A - Filling valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount a screen 26 on a liquid discharge opening 4a of a filling valve 1 for filling gas for preventing the mixture of a foreign matter and for rectifying a filling liquid. <P>SOLUTION: A center rod 10 is positioned so as to be capable of moving upward and downward in a liquid filling channel 4 formed in a valve housing 2. A liquid valve 18 comprises a valve body 14 at the tip of the rod 10 and a valve sheet 16 at the bottom end inside face of the channel 4. A bottle opening packing unit 30 is fitted so as to be capable of moving upward and downward on the outer periphery of the housing 2. The inside of a container 8 is sealed with a bottle opening packing 28 provided at the bottom end face of the unit 30. A pressurized gas is blown into the container 8 from a gas channel 36 and then the gas is exhausted while a liquid body is filled. The tip face 24 of the rod 10 is formed conical and an identically conically shaped screen 26 is mounted at a discharge opening 4a at the bottom side of the rod. The distance between the tip face 24 of the rod 10 and the screen 26 is approximated to each other when the valve 18 is closed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filling valve for filling a container with a liquid, and more particularly to a filling valve in which a screen is attached to a front end opening of a filling liquid passage.

  When filling the container with the filling valve, the liquid flowing out from the liquid outlet at the end of the filling liquid passage is rectified to prevent foaming, or foreign matter mixed in the filling liquid flows into the container. In order to prevent this, a filling valve in which a mesh-like screen is attached to a liquid discharge port at the tip of a filling nozzle is conventionally known (see, for example, Patent Document 1 and Patent Document 2).

  In the “nozzle for bag content filling device” described in Patent Document 1, a “net-like body 18 is provided at the discharge port 14 of the tip 10 a of the nozzle 10, and the liquid content is passed through the net-like body 18. Is discharged into the standing pouch 24.

  In addition, the “drip prevention filling nozzle” described in Patent Document 2 includes “a cylindrical holder 10 in which the inside is a passage for the filling liquid, and an inner periphery of the tip end portion 13 of the holder 10. A tip screen 20 that holds liquid in a large number of holes to prevent dripping;... On the inner peripheral surface 10a of the holder body, five intermediate screens 30 on the upstream side of the tip screen 20, and one rectification An arrangement in which the plates 40 are arranged in series is disclosed.

By the way, when filling carbonated beverages, the mouth of the container is sealed by bottle opening packing, pressurized gas is supplied into the container from the gas passage, and then the liquid is filled into the container from the filling nozzle. However, the pressurized gas in the container is discharged to the outside through a gas passage or the like. Then, after a predetermined amount of liquid is filled, a sniffing process for releasing the pressurized gas remaining in the upper space of the container is performed, and then the bottle opening packing is separated from the mouth of the container to complete the filling. Each of the inventions described in the above patent documents relates to a filling nozzle for filling a non-carbonated beverage. In such a gas filling, a filling nozzle is used in order to prevent foreign matter from being mixed. There is a growing need to attach a screen to the tip of the machine.
JP-A-9-118314 (page 3-4, FIG. 1) JP 2004-182245 A (page 3-4, FIG. 1)

  For example, when the screen provided in the filling valve described in Patent Document 1 and Patent Document 2 is attached to the filling valve that performs gas filling as described above, the liquid is stopped above the screen when the filling of the liquid is stopped. When the liquid remaining on the screen is sniffed, the liquid is sucked out below the screen and foamed. Furthermore, if the amount of liquid remaining on the screen is large, there is a problem that when the pressurized gas is blown in the next filling, the residual liquid is discharged into the container and causes foaming in the container. there were.

  The present invention is provided with a valve housing in which a filling liquid passage is formed, a center rod which is movably disposed in the filling liquid passage and whose tip surface is formed in a conical shape, and the center rod. A liquid valve comprising a valve body and a valve seat formed on the inner surface of the filling liquid passage, opening / closing means for moving the center rod to open and close the liquid valve, and a container provided and supplied to the valve housing Formed in the valve housing; sealing means capable of sealing the mouth of the container; elevating means for moving the sealing means and the container relatively up and down; filling amount detecting means for detecting the amount of filling liquid filled in the container; And a gas passage for supplying pressurized gas to the inside of the container, and a shape substantially the same as the tip surface of the center rod, and when the valve body is seated on the valve seat, It is obtained by a porous member provided in the discharge port of the filling liquid passage so as to approach the front end surface of the centers rod.

  In the filling valve of the present invention, the tip end surface of the center rod on which the valve body is formed and the porous member attached to the discharge port of the filling liquid passage have a substantially conical shape, and the liquid valve is closed. Since the position of the center rod tip surface and the porous member are very close, the amount of the filling liquid remaining between the center rod tip surface and the screen can be extremely reduced. Therefore, when the pressurized gas is blown in the next filling, the liquid remaining on the screen is not blown into the container. It is possible to attach a screen, and there is an advantage that a filling valve equipped with a screen can be used for both gas-free filling and gas filling.

  A liquid valve comprising a valve body formed in the center rod and a valve seat formed in the filling liquid passage by disposing the center rod in a filling liquid passage formed inside the valve housing and moving it by an opening / closing means. Open and close. When the front end surface of the center rod has a conical shape, a porous member having substantially the same shape as the front end surface of the center rod is attached to the discharge port of the filling liquid passage, and the liquid valve is closed by moving the center rod In addition, since the front end surface of the rod and the porous member are configured to be close to each other, the inside of the container is sealed by the bottle opening packing, and after the pressurized gas is supplied from the gas passage, the pressurized gas is discharged. It has become possible to attach a porous member to the filling liquid discharge port even in a filling valve for filling with gas for filling.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view of a filling valve according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of the filling valve. This filling valve (indicated by reference numeral 1 as a whole) has a filling liquid passage 4 formed inside a cylindrical valve body 2, and this filling liquid is supplied from a filling liquid tank (not shown) via a supply pipe 6. The filling liquid sent into the passage 4 is discharged from the discharge port 4a of the filling liquid passage 4 and filled into the container 8 (see FIGS. 3 and 4 described later). The supply pipe 6 is provided with a flow meter 7 for measuring the amount of liquid filled in the container 8.

  A center rod 10 that can be moved up and down is inserted into the filling liquid passage 4 and is moved up and down by a lifting and lowering air cylinder (not shown) attached above the valve body 2. A valve body 14 fitted with a seal member 12 is formed at the lower end portion of the center rod 10, and the valve body 14 and a valve seat 16 provided on the inner surface of the lower end portion of the filling liquid passage 4 A liquid valve 18 for blocking the communication of the filling liquid passage 4 is configured. The raising / lowering air cylinder constitutes an opening / closing means for the liquid valve 18. When the center rod 10 is lowered and the valve element 14 is seated on the valve seat 16 by the operation of the raising / lowering air cylinder, the filling liquid When the passage 4 is closed and the valve element 14 is separated from the valve seat 16 by the rising of the center rod 10, the filling liquid passage 4 is opened and filling is performed.

  The supply pipe 6 is connected to the upper end portion of the filling liquid passage 4 provided in the valve housing 2. The upper portion of the center rod 10 passes through the inside of the valve housing 2 above the filling liquid passage 4 and is connected to the upper lifting air cylinder. A sliding portion between the center rod 10 and the valve housing 2 is connected to the center rod 10. The bellows 22 is mounted between the upper end surface of the filling liquid passage 4 and the upper outer peripheral surface of the center rod 10 so that the filling liquid supplied from the supply pipe 6 into the filling liquid passage 4 does not come into contact.

  The front end surface (lower end surface) 24 of the center rod 10 has a conical shape and protrudes into the lower filling liquid discharge port 4a. Further, a screen for rectifying the liquid filled in the container 8 at the lower end of the filling liquid passage 4, that is, inside the liquid discharge port 4 a below the liquid valve 18, and preventing foreign matters from entering. A (porous member) 26 is provided. The screen 26 has a conical shape that substantially matches the conical shape of the distal end surface 24 of the center rod 10. In addition, when the center rod 10 is lowered and the liquid valve 18 is closed, the screen 26 is attached to the valve housing 2 so that the conical tip surface 24 of the center rod 10 and the screen 26 are in a very close position. It has been. Therefore, when the liquid valve 18 is closed after the filling is completed, the amount of the filling liquid remaining in the space between the front end surface 24 of the center rod 10 and the screen 26 is extremely small as compared with the conventional structure. In addition, when the center rod 10 is lowered and the liquid valve 18 is closed, the distance between the front end surface 24 of the center rod 10 and the screen 26 is preferably about 1 mm. The screen 26 is attached to the valve housing 2 by welding.

  The filling valve 1 according to this embodiment can be used both for gas filling for filling carbonated beverages and the like and for non-gas filling for filling other non-carbonated beverages. The bottle mouth packing 28 for sealing the mouth portion 8a is provided. The bottle opening packing 28 will be briefly described. A cylindrical bottle opening packing unit 30 is fitted to the outer periphery of the lower end portion of the valve housing 2. An O-ring 32 is mounted on the inner peripheral surface of the bottle opening packing unit 30 and slides on the outer peripheral surface of the valve housing 2 while maintaining airtightness. The opening at the lower end of the bottle packing unit 30 has a small diameter, and an annular bottle packing 28 is attached around the small diameter opening. The bottle mouth packing 28 has a diameter that matches the diameter of the mouth portion 8a of the container 8 filled with liquid. The bottle opening packing unit 30 is moved up and down by an elevating means (not shown) such as an air cylinder installed upward via a connecting rod 34. When filling the gas such as carbonated drinks with the filling valve 1, the bottle packing unit 30 is lowered by the operation of the elevating means, and the mouth 8a of the container 8 supplied with the bottle packing 28 downward is provided. The inside of the container 8 is hermetically sealed.

  Two gas passages 36 and 38 that open to the lower end surface of the valve housing 2 are provided outside the filling liquid passage 4 inside the valve housing 2. The first gas passage 36 is a gas passage and supplies and discharges gas through the on-off valve 40. The gas passage 36 includes a counter passage that supplies pressurized gas before filling the container 8 with liquid, and a gas discharge passage that discharges the gas in the container 8 when the container 8 is filled with liquid. Function as.

  The second gas passage 38 is a sniff passage, and is connected to a sniff chamber (not shown) via an on-off valve 42. The snift passage 42 releases the pressurized gas remaining in the space above the filling liquid in the sealed container 8 after the filling of the liquid into the container 8 is completed.

  The operation of the filling valve 1 according to the above configuration will be described. FIG. 3 shows an operation when filling with carbonated beverage or the like. In this case, the bottle mouth packing 28 is brought into close contact with the mouth portion 8a of the container 8 to perform sealing filling. When the container 8 is supplied below the filling valve 1, the bottle opening packing unit 30 is raised by an elevating means (not shown) so as not to interfere with the container 8. When the container 8 is supplied below the filling valve 1, the bottle packing unit 30 is lowered by the elevating means, and the bottle packing 28 is pressed against the mouth 8a of the container 8 to seal the inside of the container 8.

  Subsequently, the on-off valve 40 of the gas passage 36 is opened to supply pressurized gas into the container 8. Thereafter, an air cylinder (not shown) for opening and closing the liquid valve is operated to raise the center rod 10. When the center rod 10 rises and the valve element 14 provided near the lower end of the rod 10 moves away from the valve seat 16 and the liquid valve 18 is opened (see FIG. 3A), a filling liquid tank (not shown) The liquid that has been fed into the filling liquid passage 4 from the liquid supply pipe 6 through the liquid supply pipe 6 is filled into the container 8 through the opened liquid valve 18 and the screen 26 and filled into the container 8. The gas is discharged through the gas passage (gas discharge passage) 36. The supply pipe 6 is provided with a flow meter 7, and the amount of liquid passing through the flow meter 7 is detected. When the amount of liquid detected by the flow meter 7 reaches a predetermined amount, the elevating air cylinder operates to lower the center rod 10, and the valve body 14 at the lower end of the center rod 10 is seated on the valve seat 16. The liquid valve 18 is closed to finish the liquid filling (see FIG. 3B).

  After the filling of the liquid into the container 8 is completed, the opening / closing valve 40 of the gas passage 36 is closed, and the opening / closing valve 42 of the snift passage 38 is opened, so that the space above the liquid filled in the container 8 is sealed. Release the pressurized gas gradually. When the pressure in the space above the container 8 is reduced, the liquid remaining between the tip surface 24 of the lifting rod 10 and the screen 26 when the liquid valve 18 is closed is sucked into the container 8. In the configuration of this embodiment, since the residual liquid is very small, there is no fear of foaming. Therefore, the screen can be mounted on the liquid valve for filling with gas.

  Further, in the case of a non-carbonated beverage, non-seal filling is performed in which the inside of the container 8 is not sealed by the bottle packing 28. In this case, the bottle opening packing unit 30 is lifted by lifting means (not shown), and the bottle opening packing 28 is separated from the mouth 8 a of the container 8. In this state, the center rod 10 is raised by the lifting air cylinder to open the liquid valve 18 (see FIG. 4A). Then, after filling a predetermined amount of liquid, the center rod 10 is lowered to seat the valve element 14 on the valve seat 16 and the liquid valve 18 is closed to complete the filling (see FIG. 4A). Thus, according to the present embodiment, the filling valve 1 equipped with the screen 26 can be used for both non-gas filling and gas filling.

It is a longitudinal cross-sectional view of the filling valve which concerns on one Example of this invention. Example 1 It is an enlarged view of the principal part of the said filling valve. It is a figure explaining the action | operation at the time of gas filling and filling, (a) A figure shows the time of liquid valve opening, (b) figure shows the time of liquid valve closing. It is a figure explaining the action | operation at the time of performing nongas filling, (a) A figure shows the time of liquid valve opening, (b) figure shows the time of liquid valve closing.

Explanation of symbols

2 Valve housing 4 Filling fluid passage 4a Discharge port of filling fluid passage 7 Filling amount detection means (flow meter)
8 Container 8a Container mouth 10 Center rod 14 Valve body 16 Valve seat 18 Liquid valve 24 Center rod tip 26 Porous member (screen)
28 Sealing means (bottle opening packing)
36 Gas passage

Claims (1)

  A valve housing in which a filling liquid passage is formed; a center rod which is movably disposed in the filling liquid passage and whose tip surface is formed in a conical shape; and a valve body provided on the center rod; A liquid valve comprising a valve seat formed on the inner surface of the filling liquid passage; opening and closing means for opening and closing the liquid valve by moving the center rod; and a mouth of a supplied container provided in the valve housing. A sealing means capable of sealing, an elevating means for moving the sealing means and the container relatively up and down, a filling amount detecting means for detecting the amount of filling liquid filled in the container, and the valve housing, A gas passage for supplying pressurized gas to the center rod and a tip end surface of the center rod are formed in substantially the same shape, and when the valve body is seated on the valve seat, The filling liquid filling valve and a porous member provided in the discharge port of the passage to approach the tip end face of the de.

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