JP2500699Y2 - Reverse pressure filling valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a back pressure type filling valve applied to a filling valve of a food machine.

(Prior Art) As a back pressure type filling valve for filling a bottle into which a liquid in a filler bowl is mounted, for example, a valve shown in Japanese Patent Publication No. 56-319 is proposed. This is shown in FIG.
Is a filling valve, and the valve 8 is a filler bowl 9.
The pedestal 10 is placed on the base and is attached by the clamp 11 using the studs 12 and nuts 13. Further, an operating lever (inner) 15 is attached to the filler bowl 9 by tightening an operating lever (inner) 15 onto an operating lever (outer) 16 with a bolt 17 and a nut 18 in order to move the charging cup 14 up and down. ing.

Further, FIG. 2 shows a state where the bottle 2 is clamped to the filling valve 8, the air valve, the liquid valve and the sniff hole are all closed, and the liquid to be bottled is filled in the filler bowl 9. , There is counter pressure on the top. When the actuating lever (outer) 16 is rotated clockwise in this state by a mechanical operation, the charging cup 14 is lifted by the force of the charging spring 20 to open the air valve, and the filler bowl 9
Counter pressure inside is stem (top) 21, stem (bottom) 2
4, when it flows into the bottle 2 through the vent tube 34 and the vent hole 34a, and the inside of the bottle becomes the same pressure as the inside of the filler bowl 9,
The force of the spring 27 acts to lift the stem (lower) 24, the liquid valve opens, and the long hole 23 of the spring case 23
The liquid passes through a and passes through the screen 36 to flow into the bottle.

At the same time, the air in the bottle 2 goes back through the passage on which the counter is set, and returns to the inside of the filler bowl 9, whereby the bottle filling is advanced. When the level of the contained liquid rises up to the vent hole 34a and the return air passage from the inside of the bottle 2 is blocked, the pressure inside the bottle rises and the surface tension of the screen 36 causes the bottle 36 Stop the flow of liquid flowing in. At this time, the liquid that has already flowed from the screen 36 to the spreader 35 drops into the bottle 2 (this is called gob). Further, the liquid is pushed up from the vent hole 34a into the vent tube 34 and the stem (lower) 24 by the pressure difference between the bottle mouth portion and the filler bowl 9, and the bottle filling ends in balance.

After that, when the actuating lever (outer) 16 is turned counterclockwise and returned to the original position by a mechanical operation, the air valve and the liquid valve are pushed down by the actuating lever (inner) 15 and closed. After that, when the switching valve 43 is pressed, the concave groove communicates with the snift block (lower) 30, the counter pressure of the counter chamber 58 flows into the bottle 2 through the pipe 59, and the pressure causes the bottle to be packed above the vent hole 34a. The liquid passes through the vent tube 34, the stem (lower) 24, and the stem (upper) 21, pushes up the packing 45 forming the check valve, and is returned into the filler bowl 9 from the passage. After that, the switching valve 43 is returned to the original state, and the sniff button 37 is pushed to open the conventional bottle mouth portion to the atmospheric pressure. Then, the bottle 2 is lowered to complete the bottle filling process.

(Problems to be solved by the invention) In the conventional valve, the counter chamber 58
If the pressure difference (ΔP) between the filler bowl 9 and the filler bowl 9 is small and the pressure in the counter chamber 58 fluctuates slightly, the bottle 2
There is a case where the pressurized gas supply flow rate into the inside changes significantly, and as a result, the wind speed in the vent hole 34a changes, and it is not possible to return all the liquid packed in the bottle above the vent hole 34a to the filler bowl. However, there was a drawback that the liquid level in the bottle 2 was changed.

The present invention has been proposed to solve the above conventional problems.

(Means for Solving the Problems) Therefore, the invention is to install a filling valve, open and close a filler bowl containing a pressurized gas-containing liquid to be bottled, and a gas passage leading to a gas chamber above the bottle. A back pressure type having a counter chamber connected to the switching valve via a pipe, a vent tube forming a passage for a counter in a bottle and a return air passage, and a check valve provided on an upper passage leading to the vent tube. In the filling valve, an orifice is provided on the pipe between the switching valve and the counter chamber, which serves as means for solving the problem.

(Function) By providing an orifice on the pipe from the counter chamber to the switching valve, even if the pressure in the filler bowl and the pressure in the counter chamber change, the liquid filled in the bottle above the vent hole can be completely removed. By returning it to the inside of the filler bowl, a stable liquid level can be obtained at all times. That is, it is possible to increase the pressure difference between the pressure inside the counter chamber and the pressure inside the filler bowl. If the pressure difference is increased, the amount of pressurized gas supplied into the bottle increases, and the bottle is packed above the vent hole. Since all the liquid is returned to the filler bowl, a stable liquid level is always obtained.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings.
The figure shows an embodiment of the invention. In addition, in FIG.
The same parts as those in the figure are designated by the same reference numerals. In the figure, 8 is a filling valve, and a spacer is installed in the filler bowl 9.
10 is mounted and clamped by clamps 11 using studs 12 and nuts 13. Further, an operating lever (inner) 15 is attached to the filler bowl 9 by tightening an operating lever (inner) 15 onto an operating lever (outer) 16 with a bolt 17 and a nut 18 in order to move the charging cup 14 up and down. ing.

Explaining the structure of the filling valve 8 in detail, the air valve portion, that is, the charging cup 14 and the charging body 44 are connected by a screw, and the packing 45 is provided at the bottom of the charging body 44, and the stem (upper) twenty one
And form an air valve. Also, inside the charging body 44, packing 45 and spring 19
Is built in and constitutes a check valve. The charging body 44 is normally lifted by the spring 20 so as to open the air valve, and the other end of the spring 20 is fixed to the stem (upper) 21. Further, the liquid valve part is in the spring case 23, the seat packing 25 is attached to the lower part of the stem (lower) 24, and the upper part is attached by the screw to the stem (upper) 21, and the O-ring 26 is attached so as to prevent air leakage. It is inserted. The stem (upper) 21 and the stem (lower) 24 are usually lifted by a spring 27 in a spring case 23, and the boundary between the filler bowl 9 and the spring case 23 is a packing.
Sealed by 28.

On the other hand, it is the sniff block (upper) 29 that forms the liquid valve with the seat packing 25, and the snift block (lower) 30 is below it, which is sealed with the packing 31 between the spring case 23 and the sniff block. The center block (bottom) 30 is attached by the clamp 11 via the center ring cup (outer) 32, and the center ring cup (outer) 32 is fitted inside the center ring cup (inner) to seal the bottle mouth of the bottle 2. ) 33 is fitted. Further, a vent tube 34 is screwed into the lower portion of the stem (lower) 24 to form passages for a bottle counter and return air. The vent tube 34 has a vent hole at the tip thereof for determining the liquid level of the seasoning liquid. 34a is provided, and a spreader 35 is inserted in the middle of the vent tube 34 so that the liquid flow smoothly propagates through the bottle wall.

A screen 36 is attached to the sniff block (bottom) 30 to stop the flow of liquid, a sniff button 37 for opening the bottle mouth at the end of the bottle filling process to atmospheric pressure, a packing 38 and a retainer 39 with a small round screw 40. Installed by
The sniff spring 41 constantly seals between the packing 38 and the insert nut 42, and the insert nut 42 is attached to the sniff block (lower) 30 with a screw. There is another one in the sniff block (bottom) 30
The switching valve 43 is attached with the screw of the insert nut 57. The switching valve 43 has a groove in the middle thereof, and O-rings 55 are provided at both ends thereof, and a spring 56 normally presses the switching valve 43 against the end surface of the insert nut 57. An air passage is connected to the counter chamber 58 by a pipe 59. Further, an orifice 59a is provided in the middle of the piping 59 of the counter chamber 58 and the switching valve 43.
The sniff block (bottom) 30 is provided with horizontal and vertical holes communicating with the bottle mouth portion, and has a structure communicating with the counter chamber 58 when the switching valve 43 is pushed.

Next, the operation will be described. First, the bottle is clamped to the filling valve, and the air valve, the liquid valve, and the sniff hole are all closed. Is under counter pressure. When the actuating lever (outer) 16 is rotated clockwise by mechanical operation in this state, the charging cup 14 is lifted by the force of the charging spring 20 to open the air valve, and the counter pressure in the filler bowl 9 is stemmed. It flows through the (upper) 21, the stem (lower) 24, and the vent tube 34 into the bottle through the vent hole 34a. When the pressure in the bottle becomes the same as that in the filler bowl 9, the force of the spring 27 acts to lift the stem (lower) 24, and the liquid flows into the bottle through the elongated hole 23a of the spring case 23 and the screen 36. At the same time, the air in the bottle goes back through the passage on which the counter is set and returns to the inside of the filler bowl 9, so that the filling of the bottle is promoted.

When the level of the liquid to be ingested rises rapidly and the return air passage from the inside of the bottle is blocked up to the vent hole 34a, the pressure inside the bottle rises and the surface tension of the screen 36 causes the water to flow into the bottle from the filler bowl 9. Stop the flow of liquid. Spreader 35 from the screen 36 that was already flowing at this time
The liquid up to falls into the bottle. Further, the liquid is pushed up from the vent hole 34a into the vent tube 34 and the stem (lower) 24 by the pressure difference between the bottle mouth portion and the filler bowl 9, and the bottle filling is finished in balance.

After that, when the actuating lever (outer) 16 is turned counterclockwise and returned to its original position by a mechanical operation, the air valve and the liquid valve are pushed down by the actuating lever (inner) 15 and closed. After that, when the switching valve 43 is pushed, the concave groove communicates with the snift block (lower) 30, the counter gas in the counter chamber 58 is throttled by the orifice 59a, passes through the pipe 59 into the bottle, and is pressurized above the vent hole 34a. The liquid packed in the bottle is pushed up the packing 45 forming the check valve through the vent tube 34, the stem (lower) 24, and the stem (upper) 21, and is returned into the filler bowl 9 from the passage 52.
FIG. 1 shows this state. Then switch valve 43 back to its original position,
Press the sniff button 37 to open the conventional bottle mouth to atmospheric pressure. Then, the bottle is lowered to end the bottle filling process. At this time, the liquid filled in the bottle above the vent hole 34a is returned to the filler bowl 9, and there is no liquid in the stem (lower) 24. , Even if you sniff the bottle, the liquid will not drop.

As described above, since the orifice 59a is provided between the counter chamber 58 and the switching valve 43, the pressure in the counter chamber 58 or the pressure in the filler bowl 9 may be appropriately increased.
An accurate liquid level can be obtained without delicately controlling the difference between the internal pressure of 58 and the internal pressure of filler bowl 9.

(Effect of the Invention) As described in detail above, the present invention can increase the pressure difference (ΔP) between the internal pressure of the counter chamber and the internal pressure of the filler bowl by providing the orifice between the counter chamber and the switching valve. If the pressure difference is increased, the amount of pressurized gas supplied to the bottle increases, and the liquid filled in the bottle above the vent hole is reliably returned to the filler bowl. can get. Further, it is not necessary to precisely control the slight pressure difference between the pressure in the counter chamber and the pressure in the filler bowl, and the pressure control in the counter chamber becomes easy.
Further, since the flow rate is determined by the orifice, it is not affected by the production error generated between the valves.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a back pressure type filling valve showing an embodiment of the present invention, and FIG. 2 is a vertical sectional view showing a conventional back pressure type filling valve. Explanation of main parts of the figure 2 …… Bottle 8 …… Filling valve 9 …… Filler bowl 21 …… Stem (top) 22 …… Air valve 24 …… Stem (bottom) 30 …… Snift block (bottom) 34 …… Vent Tube 34a …… Vent hole 37 …… Snift button 43 …… Switching valve 45 …… Packing that constitutes a check valve together with spring 19 ………… Liquid valve 58 …… Counter chamber 59a …… Orifice

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP 62-52095 (JP, A) JP 56-23491 (JP, A) JP 56-319 (JP, B2)

Claims (1)

(57) [Scope of utility model registration request] 1. A filling bowl is mounted, and is connected via a pipe with a filler bowl containing a pressurized gas-filled liquid to be bottled and a switching valve for opening and closing a gas passage leading to a gas chamber above the bottle. Counter valve provided with a counter chamber provided with a counter chamber, a vent tube forming a passage for a counter in a bottle and a return air passage, and a check valve provided on an upper passage leading to the vent tube, the switching valve and the counter. A back pressure type filling valve characterized in that an orifice is provided on a pipe between the chamber and the chamber.