JP2009029455A - Filling valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filling valve capable of easily detecting damage or the like of a liquid stopper O-ring used to prevent dripping during filling a content such as a liquid, without using an expensive device or a complicated mechanism. <P>SOLUTION: The filling valve has a valve body provided with an empty space part inside, a plunger disposed in the empty space part and having a hollow part, and a deflector puff shaft for jetting an inert gas into the hollow part of the plunger. The filling valve fills a stuff into a container by actuating the plunger from the inside of the valve body. A through-hole, which extends through the hollow part in the plunger, is provided near the bottom of the groove of the liquid stopper O-ring of the plunger disposed inside the valve body in the direction of the exit of the valve body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filling valve for filling a content such as a liquid through an opening of a container. More specifically, the present invention relates to a filling valve that can easily detect damage to a liquid stopper O-ring without using an expensive device or a complicated structure to prevent damage to the liquid stopper O-ring that prevents liquid filling of the filling valve. .

  2. Description of the Related Art Conventionally, a filling valve and its nozzle for filling a content such as a liquid from an opening of a container are often used in a filling device or the like and many have been proposed.

  The filling valve used in the filling device usually has a cylinder and a piston. The piston slides freely in the cylinder, and when the piston is raised, the filling material is injected from the inlet of the cylinder side through the nozzle into the opening of the container. Is done.

  When the injection is finished, the piston is lowered and the inlet of the packing is shut off. At the same time, the nozzle to the container is closed, and simultaneously with the closing, an inert gas such as nitrogen is pressurized from the end of the conduit through the center of the cylinder. It is injected into the container. Then, the air in the container is replaced with an inert gas.

  As another purpose of injecting the inert gas, when the content is a viscous material, it remains at the tip of the nozzle, so that it is easily dropped into the container in a short time.

  The replacement of the inert gas is intended to prevent the contents filled in the container from being denatured. And the filling nozzle for viscous materials which prevents this modification | denaturation (for example, refer patent document 1) is known.

  As shown in FIG. 5, the viscous material filling nozzle 100 rotates and blows an inert gas to the inner surface conduit of the piston 111 and the tip of the rod 114, and the lower end of the piston 111 has a large diameter conduit. The rod 114 located at the large-diameter conduit portion is provided with an annular protrusion 101.

  The annular projection 101 is provided with a plurality of spiral grooves, and the viscous gas filling nozzle 100 is characterized in that the inert gas is rotated and blown out by the spiral grooves 103 and the conduit portion. It is.

  In addition to preventing the contents filled in the container from being denatured, the inert gas can drop contents such as a viscous material remaining at the tip of the nozzle into the container. And after blowing out inert gas, the filling nozzle for viscous materials raises from the opening part of a container.

  If the piston ring 113 (such as an O-ring) 113 of the piston 111 that freely slides in the cylinder 110 is damaged when the viscous material filling nozzle is raised, the contents of the piston 111 and the cylinder 110 are cleared. There is a case where a thing falls.

Prior art documents are shown below.
Japanese Patent Laid-Open No. 5-85520

  By the way, it is difficult to detect whether the cause of the contents dripping from the gap between the piston (plunger) and the cylinder (valve body) is due to, for example, damage to the piston ring (O-ring or the like). In order to detect whether or not the piston ring (O-ring or the like) is damaged, it is not known unless the nozzle is disassembled or disassembled.

  Further, in order to detect damage to the piston ring (O-ring or the like), there is a method of detecting by a detection device or the like, but it is expensive. Further, it is known that the detection is performed by the structure and mechanism of the nozzle, but the structure and mechanism of the nozzle becomes complicated. And it becomes expensive and the factor of failure increases.

  The present invention has been made in view of the above-described conventional problems, and the problem is that when filling the contents such as liquid, damage to the O-ring for liquid stop which prevents liquid dripping is expensive. It is an object of the present invention to provide a filling valve that can easily detect damage or the like of a liquid stopper O-ring without using an apparatus or a complicated mechanism or structure.

In order to solve the above problems, the invention according to claim 1 of the present invention provides:
A valve body with a cavity inside, a plunger with a cavity in the cavity, and a deflector puff shaft that injects an inert gas into the cavity of the plunger, and the operation of the plunger from the inside of the valve body A filling valve for filling the container with the filling material,
The filling valve is characterized in that a through hole penetrating the inner cavity of the plunger is provided in the vicinity of the bottom of the groove of the O-ring for liquid stopper of the plunger provided on the inner side in the outlet direction of the valve body.

Next, the invention according to claim 2 of the present invention is as follows:
The filling valve according to claim 1, wherein the through holes are provided radially downward in the direction of the plurality of inner cavities.

  Since the filling valve of the present invention has the above-described configuration, damage to the liquid stopper O-ring in the valve body can be easily detected without using an expensive detection device or the like.

  In addition, since damage such as the liquid stopper O-ring can be detected immediately, damage such as the liquid stopper O-ring is not fragmented and mixed into the filler.

  Furthermore, it is possible to detect damage to the O-ring for liquid stop without disassembling or disassembling the filling valve. Since replacement members and the like can be arranged in advance, replacement work time and the like can be performed smoothly and in a short time.

  In addition, it is possible to prevent mechanical troubles such as a damaged object such as a liquid stop O-ring from getting into the plunger in the valve body.

  The filling valve of the present invention will be described in detail below in accordance with an embodiment with reference to the drawings.

  FIG. 1 is an explanatory view showing a cross section of one embodiment of the filling valve of the present invention.

  As shown in FIG. 1, the filling valve of the present invention is formed of an air cylinder 10, a cylinder support 1, an inner boss 2, a valve body 3, a plunger 4, a lot 5, and the like. The air cylinder 10, the cylinder support 1, the inner boss 2 and the valve body 3 are sequentially connected and integrated.

  The air cylinder 10 has a mounting screw portion in the direction of the air cylinder shaft 7 aligned with the inner side of the end surface of the cylinder support 1. Moreover, the end surface of the cylinder support 1 in the opposite direction of the air cylinder 10 is formed in a flange shape. And a part of one front-end | tip part of the inner boss | hub 2 is inserted inside the cylinder support 1, and although not shown in figure, it adheres through packing. An air cylinder shaft 7 and an inner lot 6 are connected via a joint 12 inside the cylinder support 1 in the direction of the air cylinder 10.

  Further, in the opposite direction in which the mounting screw portion of the air cylinder 10 of the cylinder support 1 is joined, a part of one end portion of the inner boss 2 is fitted and fixed inside the cylinder support 1.

  The other end of the inner boss 2 is fitted inside the valve body 3 in the direction opposite to the filling port direction, and is fixed via a packing (not shown).

  An inner lot 6 and a plunger 4 connected to the air cylinder shaft 7 via a joint 12 are provided inside the inner boss 2. The inner lot 6 and the plunger 4 slide up and down on the inner surface of the inner boss 2.

  Further, the inner lot 6 and the plunger 4 are connected to each other by the pin 8 after the inner lot 6 and the plunger 4 are fitted slightly inside the valve body 3 direction from the center position of the inner boss 2.

  The pin 8 is driven into a place where a part of the plunger 4 is fitted into the inner lot 6, or conversely, a place where a part of the inner lot 6 is fitted into the plunger 4. And the inner lot 6 and the plunger 4 are connected as mentioned above.

  A steam seal steam inlet 9 is provided in the direction of the cylinder support 1 outside the inner boss 2.

  Further, an air flush air inlet 11 is provided in the direction of the valve body 3 outside the inner boss 2.

  Steam or the like injected from the steam seal steam inlet 9 is injected from the inner cavity of the inner lot 6 through the cavity of the plunger 4 and from the filling port 15 of the valve body 3.

  When the steam or the like is sprayed from the filling port 15 of the valve body 3, the tip of the deflector puff shaft 13 provided at the tip of the lot 5 in the direction of the filling port 13 is formed in a trumpet shape. Is diffused. Then, by injecting air instead of steam, the filler adhering to the front end of the filling port 15 of the valve body 3 and the front end of the plunger 4 in the direction of the filling port 15 can be blown down into the container.

In addition, steam or the like injected from the steam seal steam inlet 9 in the direction of the air cylinder 10 and the direction of the filling port 15 is formed on the inner boss 2 outside the inner lot 6 where the steam seal steam inlet 9 is provided. O-rings 24 and 25 are provided so as to be surely injected into the inner cavity of the inner lot 6 from the inner cavity.

  The O-rings 24 and 25 are formed of a circular link formed of a known synthetic rubber or synthetic resin. Further, the material of the forming link is appropriately selected by steam or the like.

  Similarly, flush air or the like injected from the air flash air inlet 11 provided outside the inner boss 2 passes from the inner cavity of the inner lot 6 through the cavity of the plunger 4 and fills the valve body 3. Inject from the mouth 15.

  When flush air or the like is injected from the filling port 15 of the valve body 3, the tip of the deflector puff shaft 13 provided at the tip of the lot 5 in the direction of the filling port 13 is formed in a trumpet shape. Etc. are diffused and pressurized and injected into the container. And the work time etc. of the replacement work mentioned later can be shortened.

  Further, by injecting an inert gas such as nitrogen instead of flash air, the air in the head space of the filling material filled in the container can be replaced with an inert gas such as nitrogen. And modification | denaturation of the filler etc. in a container can be prevented.

  Further, on the outside of the inner lot 6 on the inner side where the air introduction port 11 for air flash is provided, flash air or the like injected from the air introduction port 11 for air flash in the direction of the air cylinder 10 and the direction of the filling port 15 is the inner. O-rings 24 and 23 are provided so as to be surely injected into the inner cavity of the inner lot 6 from the inner cavity of the boss 2.

  The O-ring 23 is suitably selected from a circular link having a circular cross section made of a known synthetic rubber or synthetic resin. The material of the forming link is appropriately selected according to the type of flash air or gas injected into the container.

  Next, FIG. 2 is an enlarged view showing an enlargement of part A of FIG.

  As shown in FIG. 2, the plunger 4 is lowered by the air cylinder 10, and the filling port 15 on the inner side of the valve body 3 has an outer edge at the front end of the plunger 4 in the filling port direction and a liquid stop O-ring 16 provided on the plunger 4. In a sealed state.

  The outer diameter of the filling port 15 of the valve body 3 is such that the outer diameter of the lower end of the filling port 15 is larger than the upper outer diameter so that the filling port 15 can be smoothly inserted into the opening of a container or the like filled with the filling valve 50. Are also formed in a tapered shape. And the outer diameter of the front end of the filling port lower portion 17 of the plunger 4 that seals the filling port 15 of the valve body 3 is also formed.

  In addition, the gap between the inside of the filling port 15 of the valve body 3 and the outside of the plunger 4 that seals the filling port 15 of the valve body 3 is narrower as long as the plunger 4 can move smoothly up and down by the air cylinder 10. desirable.

  The gap between the inside of the filling port 15 of the valve body 3 and the outside of the plunger 4 varies depending on the viscosity of the filling material to be filled.

  Usually, if the gap between the inside of the filling port 15 of the valve body 3 and the outside of the plunger 4 is about 0.005 mm, the vertical movement of the plunger 4 can be performed smoothly.

In addition, a groove 20 around which the liquid stopper O-ring 16 is provided is provided outside the filling port upper portion 18 of the plunger 4. The outer surface of the O-ring 16 for liquid stop is the valve body 3
It is provided in a state where it is pressed against the inner surface.

  For this reason, even if there is a slight gap between the inside of the valve body 3 and the outside of the plunger 4, the filling does not leak from this gap.

  Further, a through-hole 20 that penetrates the inner cavity of the plunger 4 is provided in the vicinity of the bottom of the groove 20 around which the liquid stopper O-ring 16 is provided.

  Further, the through-hole 20 penetrating into the inner cavity of the plunger 4 is sealed by a liquid-stopping O-ring 16 provided around the groove 19. When the liquid stopper O-ring 16 is damaged, the sealed state is released, and the filling material filled from the through hole 20 flows out to the inside of the plunger 4. For this reason, damage to the O-ring 16 for liquid stop can be confirmed without disassembling or disassembling the filling valve.

  Further, the O-ring 16 for liquid stopper may be attacked by the filler depending on the material other than damage, and the tightness is impaired. For this reason, a gap is formed between the through hole 20 and the liquid stopper O-ring 16, and the sealing performance is impaired, and the filled material oozes out inside the plunger 4. Then, it is possible to detect that the liquid stopper O-ring 16 must be replaced.

  Further, the liquid-stopping O-ring 16 has a so-called life that deteriorates tightness when used for a long period of time, and needs to be replaced in an appropriate period. For this reason, a gap is formed between the through hole 20 and the liquid stopper O-ring 16 in the same manner as described above, the sealing performance is impaired, and the filled material oozes out inside the plunger 4. And the life of the O-ring 16 for liquid stop can be detected.

  A plurality of the through holes 20 may be provided. In addition, although not shown, a plurality of through holes 20 near the bottom of the groove 19 are provided radially toward the inner cavity of the plunger 4 so as to detect damage to the liquid stopper O-ring 16 quickly. be able to.

  A hollow portion is formed inside the plunger 4. In addition, the lot 5 is provided in the hollow portion as described above.

  Further, a deflector puff 13 whose tip is formed in a trumpet shape is provided at the tip of the lot 5 in the direction of the filling port.

  Further, the hollow portion injects steam inserted from the steam seal steam inlet 9 or flash air introduced from the air flash air inlet toward the filling port.

  Further, the outer periphery of the filling port periphery of the inner cavity portion of the plunger 4 extends outward in accordance with the trumpet shape. Then, the steam or flash air diffused by the deflector puff 13 whose tip is expanded in a trumpet shape is further diffused to improve the drainage at the end of filling or adhere to the tip of the filling port. Blow off any fillers.

  The material of the valve body 3 is not particularly limited, but is rolled structural steel, structural carbon steel, forged material, cast material, malleable cast, chilled cast or aluminum alloy, cast aluminum alloy for bearing, chrome steel, chrome. -Metals such as nickel steel, nickel chrome steel, aluminum / nickel alloy, nickel chrome alloy. And the steel surface with high carbon amount which can quench the friction surface of a filling port periphery, such as a high frequency, or the nitriding steel which can nitride a friction surface is preferable.

  Alternatively, a resin such as nylon resin, polyethylene terephthalate resin, or polypropylene resin can be used depending on the size and application of the filling valve.

    Also, the material of the plunger 4 is not particularly limited, but as with the valve body 3, structural rolled steel, structural carbon steel, forged material, cast material, malleable cast, chilled cast or aluminum alloy, aluminum alloy for bearings Metals such as castings, chrome steel, chrome / nickel steel, nickel chrome steel, aluminum / nickel alloy, nickel chrome alloy can be used. And the steel surface with high carbon amount which can quench the friction surface of a filling port periphery, such as a high frequency, or the nitriding steel which can nitride a friction surface is preferable.

  Alternatively, a resin such as nylon resin, polyethylene terephthalate resin, or polypropylene resin can be used depending on the size and application of the filling valve.

  Further, as the O-ring 16 for liquid stop, a known appropriate one used for leakage prevention or the like with a circular cross-section formed link made of synthetic rubber or synthetic resin is used. And the thing of a special material is used by the filler.

  Next, FIG. 3 is a schematic view showing a state where the filling port of the filling valve of FIG. 1 is opened. FIG. 4 is an enlarged view showing an enlargement of a portion B in FIG.

  As shown in FIG. 3, the air cylinder shaft 7 is raised by the suction of the air cylinder 10 at the opening of the filling port 15 of the filling valve 50. Then, the joint 12, the inner lot 6, and the plunger 4 connected to the air cylinder shaft 7 rise in the direction of the air cylinder 10, thereby opening the filling port 15 of the filling valve 50.

  Further, as shown in FIG. 3, in the filling valve 50, the filling port 15 is opened after the filling port 15 of the valve body 3 is inserted into the opening of the container for filling the filling material. The filling material injected from the filling material inlet 14 of the filling valve 50 is filled into a container or the like from the inner surface of the filling port 15 of the valve body 3.

When filling is completed, as shown in FIG. 1 or FIG. 2, the plunger 4 descends toward the filling port 15 of the valve body 3 of the filling valve 50 in the direction of the filling port 15, and the inside of the filling port 15 of the valve body 3 is closed. At the same time, the steam inserted from the steam seal steam inlet 9 from the inner cavity of the plunger 4 or the flash air injected from the air flash air inlet 11 is injected from the tip of the filling port 15 of the plunger 4.
When the filler injected from the filler inlet 14 is easily denatured by oxidation, an inert gas such as nitrogen is injected from the air inlet 11 for the air flash.

  Then, as described above, an inert gas such as nitrogen is filled with the filling material and injected into the container to replace the air in the container with the inert gas. Further, the filler or the like adhering to the tip of the filling port 15 is blown off at the end of filling.

It is a section explanatory view showing the section of one example of the filling valve of the present invention. It is an expanded sectional explanatory view of the A section of FIG. It is the schematic which shows the state which the filling port of the filling valve of FIG. 1 opened. It is an enlarged view which shows the expansion of the B section of FIG. It is the schematic for demonstrating the outline of the conventional filling valve | bulb.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cylinder support 2 ... Inner boss 3 ... Valve boy 4 ... Plunger 5 ... Lot 6 ... Inner lot 7 ... Air cylinder 8 ... Pin 9 ... Steam inlet for steam seal 10 ... Air cylinder 11 ... Air inlet 12 for air flush 12 ... Joint DESCRIPTION OF SYMBOLS 13 ... Deflector puff shaft 14 ... Filling material inlet 15 ... Filling port 16 ... Liquid stop O-ring 17 ... Plunger filling port lower part 18 ... Plunger filling port upper part 19 ... Groove 20 ... Through-hole 23 ... O-ring 24 ... O-ring 25 ... O-ring 50 ... Filling valve

Claims (2)

A valve body with a cavity inside, a plunger with a cavity in the cavity, and a deflector puff shaft that injects an inert gas into the cavity of the plunger, and the operation of the plunger from the inside of the valve body A filling valve for filling the container with the filling material,
A filling valve characterized in that a through-hole penetrating the inner cavity of the plunger is provided in the vicinity of the bottom of the groove of the O-ring for liquid stopper of the plunger provided on the inner side in the outlet direction of the valve body.   The filling valve according to claim 1, wherein the through holes are provided radially downward in the direction of the plurality of inner cavities.

Images