JP3499925B2 - Filling valve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling valve for filling a container, such as a bottle or a can, with a liquid. 2. Description of the Related Art A conventional filling valve will be described with reference to FIGS. 2 and 3. Reference numeral 100 denotes a filling valve.
Is an outer cylinder 2 mounted vertically on the lower surface of the liquid tank 1,
An inner cylinder 3 held by the outer cylinder 2 so as to be vertically movable and capable of protruding downward from a lower end of the outer cylinder 2, a spring 4 for constantly urging the inner cylinder 3 downward, An exhaust pipe 5 inserted into the inner cylinder 3 and protruding downward from a lower end of the inner cylinder 3 is provided. The exhaust pipe 5 is inserted into the inner cylinder 3 from below, and the hole 2b formed in the lid 2a at the upper end of the outer cylinder 2 penetrates upward. Cover the end face 2a
And a snap ring 6 is attached to a ring-shaped groove 5b formed in an outer peripheral portion of the exhaust pipe 5 so that the exhaust pipe 5 is held swingably on the outer cylinder 2 in this state. I have. The space above the liquid level L in the liquid tank 1 is
And a vacuum degree slightly higher than the water head from the bottom to the lower end of the inner cylinder 3 is maintained. 14 and 15 are O-rings, and 16 is a wound bush. In the filling valve described above, when the bottle 7 is pushed up by a lift cylinder (not shown), the mouth of the bottle 7 is guided by the centering bell 8, and comes into close contact with the inner surface of the centering bell 8. The portion is in close contact with the lower surface of the seal ring gasket 9 fixed to the shoulder 3a of the inner cylinder 3, so that the inside of the bottle 7 is sealed. When the bottle 7 is further pushed up, the inner cylinder 3 moves upward against the spring 4, and the shoulder 3b of the inner cylinder 3 comes into contact with the lower end of the outer cylinder 2 to be in the state of FIG. At this time, the upward movement of the inner cylinder 3 causes
An air inlet 10 provided at the lower end of the exhaust pipe 5 and a liquid outlet 11 provided at the lower end of the inner cylinder 3 are open, and the exhaust pipe 5 in the exhaust pipe 5 rising to the level of the liquid level L in the liquid tank 1 The liquid returns to the liquid tank 1 due to the pressure difference between the liquid tank 1 and the bottle 7,
The liquid in the liquid tank 1 enters the outer cylinder 2 from a liquid inlet drilled at the upper end of the outer cylinder 2, and passes through a gap between the inner peripheral surface of the inner cylinder 3 and the outer peripheral surface of the exhaust pipe 5, from the liquid outlet 11. It flows into the bottle 7 and is filled. On the other hand, the air in the bottle 7 is discharged from the air inlet 10 through the exhaust pipe 5 to a space above the liquid level L of the liquid tank 1. When the filling of the liquid into the bottle 7 is completed, the weight of the bottle 7 and the spring force of the spring 4 cause the
And the centering bell 8 and the inner cylinder 3 descend, and the lower surface of the flange 3c provided on the outer peripheral surface of the inner cylinder 3 comes into contact with the flange 12b provided on the lower end of the stopper ring 12 screwed to the outer cylinder 2. 2, the air inlet 10 and the liquid outlet 11 are closed by the inner cylinder 3. In the conventional filling valve shown in FIGS. 2 and 3, when the filling device is operated for filling, the inner cylinder 3 of the filling valve is connected to the outer cylinder 2. It repeatedly slides up and down in contact with the filling liquid.
A winding bush 16 is fitted into the sliding portion between the inner cylinder 3 and the outer cylinder 2 so as to smoothly slide up and down even if a twisting force (bending moment) such that the inner cylinder 3 is inclined is applied. An O-ring 15 is fitted over the winding bush 16 so that the filling liquid does not enter the sliding part. And penetrates into a small gap around the winding bush 16. [0008] When this filling liquid is left standing, it solidifies with the passage of time and adheres to the outer cylinder 2 side, and finally comes out from between the O-ring 15 and the outer cylinder 2 to the filling liquid passage side. The inconvenience of becoming an impurity and filling the inside of the bottle 7 occurs. This phenomenon is remarkable when the viscosity of the filling liquid is high, particularly when high-temperature filling is performed. This winding bush 16
Since the remaining matter in the part cannot be removed by the ordinary washing performed by flowing the washing liquid into the filling liquid passage after the filling operation is completed, the entire number of filling valves is manually disassembled and washed, but the number of filling valves is large. Therefore, there has been a problem that much labor is required. The present invention has been made in view of the above-mentioned problems, and has as its object the purpose of the present invention is to automatically clean a sliding portion between an outer cylinder and an inner cylinder, thereby significantly reducing labor. The point is to provide a valve. In order to achieve the above object, the present invention provides an outer cylinder vertically mounted on a lower surface of a liquid tank and a vertically slidable outer cylinder. and the inner tube can be projected downward from the lower end portion of the outer cylinder is held in a spring biasing downwardly the same inner cylinder always sliding of the outer cylinder and the inner cylinder
A stopper attached to the outer cylinder so as to surround the moving part
Ring and, in the filling valve and a said outer cylinder and extendable exhaust pipe from the lower end portion of the inserted and the inner cylinder into the inner cylinder downwardly, circles barrel wall of the outer cylinder as a double wall structure
A cylindrical cleaning liquid passage is formed and installed on the outer peripheral wall of the outer cylinder.
An inlet that receives the supply of cleaning liquid into the cleaning liquid passage
And provided on the inner wall of the outer cylinder from the washing passage
An outlet for supplying a cleaning liquid to a sliding portion between the outer cylinder and the inner cylinder
And a drainage hole opened in the stopper ring,
Washing with pressure supplied to the washing liquid passage from the inlet
Purified liquid flows into the sliding part from the outlet and moves the inner cylinder up and down.
To drain the drainage hole while cleaning the sliding part
It is characterized by having been constituted so that. The filling valve of the present invention is constructed as described above, and has a cleaning liquid passage inlet → a cleaning liquid passage → in which a pressured cleaning liquid is provided on the outer peripheral surface of the outer cylinder with the inner cylinder lowered. The washing liquid passage outlet is supplied to a sliding portion between the outer tube and the inner tube, and the filling liquid remaining in this portion is washed away and flows out of the filling valve from the lower end of the outer tube. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a filling valve of the present invention will be described with reference to an embodiment shown in FIG. 1. Reference numeral 100 denotes a filling valve, and the filling valve 100 is mounted on a lower surface of a liquid tank 1 vertically. The cylinder 2 and the outer cylinder 2 movably held up and down by the outer cylinder 2
An inner cylinder 3 that can protrude downward from the lower end of the inner cylinder 3, a spring 4 that constantly biases the inner cylinder 3 downward, the outer cylinder 2 and the inner cylinder 3
And an exhaust pipe (see 5 in FIGS. 2 and 3) that can be inserted downwardly and protrude downward from the lower end of the inner cylinder 3. A stopper ring 12 screwed to the outer cylinder 2;
15 is an O-ring interposed between the outer cylinder 2 and the inner cylinder 3;
Is a winding bush fitted in a sliding portion between the inner cylinder 3 and the outer cylinder 2. Note that the two-dot chain line indicates the raised position of the inner cylinder 3.
The lower body of the outer cylinder 2 has a double wall structure, and has a cylindrical cavity (cleaning liquid passage) 2 c formed therein. The upper end opening of the cylindrical cavity 2 c is formed on the outer peripheral surface of the outer cylinder 2. A plurality of holes 2d are provided at the lower end of the outer cylinder 2 around the lower end of the cylindrical cavity 2c, communicating with the cleaning tube 21 via the screwed nipple 20 for the cleaning liquid inlet. A hole 2d is opened on the side of the winding bush 16 between the inner cylinder 3 and the outer cylinder 2. The holes 2d open between the upper end of the winding bush 16 and the O-ring 15 when the inner cylinder 3 is lowered. A plurality of drain holes 12a are provided below the stopper ring 12. Next, the operation of the charging valve shown in FIG. 1 will be specifically described. The operation of filling the container with the filling liquid is the same as the conventional filling valve. During operation, a gap between the inner peripheral surface of the outer cylinder 2 and the inner cylinder 3 and the outer peripheral surface of the exhaust pipe (see 5 in FIGS. 2 and 3) passing therethrough becomes a passage for the filling liquid. This passage is always filled with the filling liquid, and the inner cylinder 3
Repeatedly slides vertically. The space between the upper outer peripheral surface of the inner cylinder 3 and the inner peripheral surface of the outer cylinder 2 is sealed by an O-ring 15. It penetrates between the outer cylinder 2 and the inner cylinder 3 and stays around the inner peripheral surface of the outer cylinder 2, the outer peripheral surface of the inner cylinder 3, and around the winding bush 16. The tube 21 → the nipple 20 for the cleaning liquid inlet → the supply to the cylindrical cavity (cleaning liquid passage) 2c, while the inner cylinder 3 is moved up and down to wash out the filling liquid remaining near the winding bush 16 and the outer cylinder 2 It flows down from the lower end to the space between the stopper ring 12 and the inner cylinder 3 and flows out of the stopper ring 12 through the hole 12a.
The vertical movement of the inner cylinder 3 performed at this time is for promoting the cleaning of the sliding portion. The above cleaning is performed simultaneously with the cleaning of the liquid tank 1 and the filling valve which is normally performed after the operation is completed. The filling valve of the present invention is constructed as described above, and has a cleaning liquid passage inlet in which a cleaning liquid having a pressure is provided on the outer peripheral surface of the outer cylinder while the inner cylinder is lowered. Passage → Washing liquid passage outlet → Supply to the sliding part between the outer cylinder and the inner cylinder, wash out the filling liquid remaining in this part, and let it flow out of the filling valve from the lower end of the outer cylinder. The sliding part with the inner cylinder can be automatically cleaned, and the labor can be remarkably reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view showing one embodiment of a filling valve of the present invention. FIG. 2 is a longitudinal side view showing a state at the time of completion of filling of a conventional filling valve. FIG. 3 is a vertical sectional side view showing a state in which the filling valve is being filled with liquid. [Description of Signs] 1 Liquid tank 2 Outer cylinder 2c Cylindrical cavity (washing liquid passage) 2d Hole 3 Inner cylinder 4 Spring 5 Exhaust pipe 12 Stopper ring 12a Drain hole 15 O-ring 16 Winding bush 20 Cleaning liquid inlet nipple 21 Cleaning tube 100 filling valve

Claims (1)

(57) [Claims] [Claim 1] An outer cylinder mounted vertically on a lower surface of a liquid tank, and is held by the outer cylinder so as to be slidable in the up-down direction and from a lower end of the outer cylinder. An inner cylinder that can project downward, a spring that constantly urges the inner cylinder downward, and sliding of the outer cylinder and the inner cylinder
Stopper attached to the outer cylinder so as to surround the part
Ring and, in the outer cylinder and filling valve having an exhaust pipe capable protruding downward from the lower end portion of the inner tube is inserted into the inner cylinder, a cylindrical torso in the wall of the external cylinder as a double wall structure Washing liquid
A passage is formed on the outer peripheral wall of the outer cylinder.
An inlet for receiving the supply of the cleaning liquid into the cleaning liquid passage,
It is provided on the peripheral wall surface and the outer cylinder and the inner
An outlet for supplying a cleaning liquid to a sliding portion between the cylinder and the stopper;
A drain hole opening in the ring, and
The pressured cleaning liquid supplied to the cleaning liquid passage is
Flow into the sliding part and move the inner cylinder up and down to wash the sliding part.
A filling valve configured to flow out of the drainage hole while being purified .