JPH08133307A - Check valve for preventing liquid leakage, and container for pouring employing the check valve - Google Patents

Abstract

PURPOSE: To provide a check valve for preventing liquid leakage that is simple in structure without requiring a driving means, and to provide a container for pouring employing the check valve of this type. CONSTITUTION: In a check valve 6 composed of a valve case 3 having a suction port 1 and a discharge port 2, a valve plug 4 moving in reciprocation inside the valve case, and a valve seat 5 contacting the outer circumference of the valve plug, an extended part 3a is provided to the upper part of the valve case 3 while a cylindrical part 3b-3c is provided, extending over a specified length with a slight distance kept from the outer circumference of the valve plug, to the lower part of the valve case 3. Liquid remaining in the discharge port 2 is partially sucked into the inside of the valve case 3 by return motion of the valve plug 4, and the surface of the liquid in the discharge port is retreated to the inner side, and thereby leakage of liquid is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dripping prevention check valve and a pouring container using the same.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, for example, a liquid material supply passage 2 is provided on one side of a cylinder 22 accommodating a piston 21 as shown in FIG.
4 to connect the filling nozzle 2 to the discharge port 25 of the cylinder 22.
6 is connected to the discharge port 25, and an opening / closing valve 27 that is normally urged in the valve closing direction is disposed on the outlet side of the discharge port 25.
1 at the tip of the above-mentioned opening / closing valve 2 for a certain period of time during the initial movement of the piston
Liquid amount quantitative filling device characterized in that it is provided with a protrusion 28 for holding the valve 7 open (Japanese Patent Laid-Open No. 5-196158)
It has been known.

[0003]

SUMMARY OF THE INVENTION According to the above-mentioned invention, when the piston 21 is returned after the filling is completed, a part of the liquid material remaining in the filling nozzle 26 is sucked into the cylinder 22 so that the inside of the nozzle 26 is filled. The liquid level is set back inside the nozzle to prevent liquid dripping. However, the structure is complicated and there is a drawback in that a device for driving the piston is newly required. Therefore, an object of the present invention is to provide a dripping prevention check valve having a simple structure and requiring no driving means, and a pouring container using the same.

[0004]

DISCLOSURE OF THE INVENTION The present inventors finally completed the present invention as a result of intensive studies to solve such problems. That is, according to the present invention, in the check valve 6 including the valve chamber 3 having the suction port 1 and the discharge port 2, the valve body 4 reciprocating inside the valve chamber 4, and the valve seat 5 in contact with the outer peripheral surface of the valve body, A cylindrical portion 3 provided with an enlarged portion 3a in the upper portion of the valve chamber 3 and holding a minute gap g with the outer peripheral surface of the valve element over a predetermined length in the lower portion.
b-3c is provided, and the present invention relates to the above-mentioned suction port 1 of the above-mentioned anti-drip check valve.
In addition, one end of the pouring nozzle 7 is connected, and the other end of the nozzle 7 is inserted into an upper portion of a bag 8 made of a synthetic resin film in which a liquid is housed and liquid-tightly connected. It is a pouring container.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic longitudinal cross-sectional view showing a specific example of the liquid spill prevention check valve of the present invention, showing a stopped state of the flow of liquid, and FIG. 2 is a state when pouring out the liquid. FIG. 3 is a diagram showing a state in which the valve body 4 is falling in the valve chamber 3 after the liquid has been poured out, and FIG.
Shows an example in which an O-ring 9 is used as a valve seat, and FIG.
3 shows a pouring container using the non-drip check valve of the present invention.

FIG. 1 is a schematic longitudinal cross-sectional view showing a specific example of the anti-drip check valve according to the present invention. A valve chamber 3 having an intake port 1 and a discharge port 2 and a valve element reciprocating in the chamber. 4 and a check valve 6 consisting of a valve seat 5 in contact with the outer peripheral surface of the valve body,
The structure is such that an enlarged portion 3a is provided in an upper portion of the valve chamber 3 and a cylindrical portion 3b-3c is provided in a lower portion thereof for holding a minute gap g with the outer peripheral surface of the valve body over a predetermined length.

In this embodiment, the valve chamber and the valve body are a cylinder and a ball valve, respectively, but this combination is optional. That is, the valve chamber may be a cylinder having a polygonal or elliptical cross section, and the valve body may be a valve having a corresponding cross-sectional shape.

As a matter of course, the valve seat 5 in contact with the outer peripheral surface of the valve body needs to have a shape capable of maintaining liquid tightness with the valve. For example, when using a ball valve, see FIGS.
It may be a circular valve seat as shown in FIG. 4 or may be a valve seat for the O-ring 9 as shown in FIG. O
When a ring is used, it has an advantage that liquid tightness can be obtained relatively easily by using a ring made of elastic rubber. In addition, 10 shows the O ring storage groove.

The present invention is characterized in that the enlarged portion 3a is provided in the upper portion of the valve chamber 3 and the cylindrical portion 3b-3c is provided in the lower portion for holding a minute gap g with the outer peripheral surface of the valve body over a predetermined length. There is. As the enlarged portion 3a, any structure can be adopted as long as the liquid can smoothly flow out when the liquid is poured out as shown in FIG. 2. For example, in FIG. As shown, the ball valve radius r1 and the enlarged portion 3a
The object can be achieved by maintaining the distance (r3-r1) from the radius r3 of 12% or more of the radius r1 of the ball valve. In addition, s indicates a groove portion formed at the lower end portion of the discharge port, which is provided to secure a smooth flow path of the liquid. In addition, the inner diameter of the enlarged portion 3a is gradually increased toward the discharge side to form a taper shape (see FIG. 4).
Alternatively, it may have a trumpet-shaped structure. This test
It is preferable to use a puck or trumpet type because the ball valve smoothly reciprocates. Further, if the groove portion (or rib) is formed in the inner peripheral wall of the enlarged portion 3a in the axial direction, it is not necessary to form a trumpet-shaped structure,
Even if the distance between the radius r1 of the valve and the radius r3 of the enlarged portion 3a is small, the liquid can be smoothly discharged.

Further, it is also important to provide a cylindrical portion 3b-3c for maintaining a minute gap with the outer peripheral surface of the valve body over a predetermined length in the lower portion of the valve chamber 3. It is possible to prevent dripping. That is, FIG. 3 is a view showing a state in which the valve body 4 is falling in the valve chamber 3 after the pouring of the liquid is completed, but the central portion o of the ball valve moves from the upper end portion to the cylindrical portion 3b. Even if it falls all the way, the liquid level of the liquid filled in the discharge port 2 maintains the position of p, but from this state, the central portion o of the ball valve 4 moves from the position of 3b of the tubular portion to the two-dot chain line. As shown by, when the distance h up to 3c is moved, the ball valve 4
The gap g between the outer peripheral surface and the cylindrical portion 3b-3c is 0.1 to 5.0%, preferably 1.0 to 3.0% of the radius r1 of the ball valve.
Since the ball valve serves as a closing plug, the valve chamber 3
Is divided into an upper liquid and a lower liquid, a part of the liquid remaining in the discharge port 2 is sucked into the valve chamber by the movement of the ball valve 4, and the liquid level in the discharge port is set to one point from point p. Q shown by a chain line
It can be retracted to the point to prevent dripping (Fig. 1
Indicates the state at that time). The above gap g
Is finely adjusted when the viscosity of the liquid to be handled is high, and conversely, when the viscosity of the liquid is low, the fine adjustment is performed to narrow the valve body 4 in the valve chamber 3.
The liquid dripping prevention effect can be achieved within a range that does not hinder the reciprocating movement of the. Further, since the check valve effect allows the liquid to remain in the valve chamber constantly, this liquid serves as a closing plug, and it is possible to prevent the outside air from entering the inside and beyond. In addition, since the valve body is always immersed in the liquid, solid matter may adhere to the outer periphery of the valve body, reducing its sliding performance or sealing performance, or deteriorating its durability or life. Absent. By appropriately selecting the lengths of 3b-3c, the amount by which the liquid surface in the discharge port is retracted to the valve chamber side can be adjusted. Further, by selecting the radius r1 of the ball valve and the radius r2 of the tubular portion, the amount of retreating the liquid surface in the discharge port to the valve chamber side can be adjusted.

The material of the valve body 4 is larger than the specific gravity of the liquid, and is made of rust-proof metal such as stainless steel, ruby, sapphire, ceramic, glass, plastic,
It is preferable to use natural stone such as marble or crystal, or a combination of these, and the surface of which is rust-proofed. The larger the specific gravity is, the more smoothly the reciprocating motion is performed in the valve chamber, which is preferable.

Next, FIG. 5 is a vertical cross-sectional schematic explanatory view showing a specific example of a pouring container using the anti-drip check valve of the present invention. A valve chamber having a suction port 1 and a discharge port 2 is shown. 3, a valve element 4 that reciprocates inside the valve element 3, and a valve seat 5 that contacts the outer peripheral surface of the valve element 5.
And a cylindrical portion 3b-3c for holding a minute gap g with the outer peripheral surface of the valve disc over a predetermined length in the lower portion of the check valve 6 consisting of A bag in which one end of a pouring nozzle 7 is connected to the suction port 1 of the anti-dripping check valve and the other end of the nozzle 7 is made of a synthetic resin film (including a rubber bag) and in which a liquid is stored. It is configured to be inserted in the upper part of 8 and liquid-tightly connected. In addition, 1
Reference numeral 1 denotes a bottomed cylindrical operation casing having an opening at the upper end, 8 denotes a bag inserted therein and containing a liquid, and 12 denotes a lid body for closing the opening of the operation casing. In the pouring container of the present embodiment, the anti-drip check valve of the present invention is applied to a pouring container composed of an operation casing and an inner bag 8 (container).
Instead of using the operation casing, it may be inserted into the upper portion of the bag 8 and used as a liquid-tightly connected pouring container.

[0013]

Example 1 A cylindrical valve chamber 3 having a length of 30 mm having an inlet 1 having an inner diameter of 3 mm and an outlet 2 having an inner diameter of 3 mm, and a ball valve 4 made of stainless steel SUS316 having an outer diameter of 8 mm reciprocating therein. In a check valve 6 consisting of a silicone rubber O-ring 9 (valve seat 5) having an inner diameter of 4 mm and an outer diameter of 8 mm which is in contact with the outer peripheral surface of the valve body, an inner diameter of 9 mm is provided above the valve chamber 3.
A cylindrical enlarged portion 3a having a length of 10 mm is provided, and the outer peripheral surface of the ball valve is separated from the outer peripheral surface of the ball valve by a length of 10 mm at the lower portion.
As shown in FIG. 5, a non-drip check valve provided with a cylindrical tube portion 3b-3c having an inner diameter of 8.1 mm for holding a gap of mm was set.

[0014]

[Embodiment 2] Bottomed cylindrical container 11 having an opening at the top
Then, a pouring container was prepared, which consisted of the operation casing and the lid 12 having the air hole 13 and closing the opening. The non-dripping check valve 6 of the first embodiment is provided with the lid 12 of the pouring container.
The check valve 6 has a suction port 1 with an inner diameter of 3 m.
m, 15 mm in length, one end of the pouring nozzle 7 is connected, and the other end of the nozzle 7 is inserted into an upper portion of a bag 8 filled with 150 ml of soy sauce inside with an aluminum foil laminate film of 10 cm in width and 15 cm in length. Then, they were liquid-tightly connected and the pouring container was set as shown in FIG.

[0015]

[Application Example 1] When the dispensing container obtained in the above Example 2 was picked up and tilted as shown in FIG. 2 to dispense about 30 ml, it was returned to the original position (vertical direction), The ball valve quickly dropped from the upper end portion to the valve seat in the valve chamber, retracted the liquid surface in the discharge port to the inner depth of the discharge port, and was able to prevent liquid dripping. Further, this operation was repeated four times, but it was confirmed that the outside air could be prevented from entering the inside of the bag. As a result, it is understood that the present pouring container can prevent oxidative browning and flavor deterioration due to air of the liquid in the bag as much as possible. According to the present invention, it can be suitably used as a pouring container for liquid foods, particularly soy sauce, sauce, dressing, soup, sauce, mirin, vinegar, and ra oil.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional schematic explanatory view showing a specific example of the anti-drip check valve of the present invention, showing a stopped state of liquid flow.

FIG. 2 is a diagram showing a state when a liquid is being poured out.

FIG. 3 is a view showing a state in which the valve body 4 is falling in the valve chamber 3 after the liquid has been poured out.

FIG. 4 is a diagram showing an example in which an O-ring 9 is used as a valve seat in the anti-drip check valve of the present invention.

FIG. 5 is a view showing a pouring container using the non-dripping check valve of the present invention.

FIG. 6 is a view showing a pouring device using a conventional non-dripping check valve.

[Explanation of symbols]

 1; Suction port 2; Discharge port 3; Valve chamber 4; Valve body 5; Valve seat 6; Check valve 3a; Enlarged portion 3b; Cylindrical upper end 3c; Cylindrical lower end 6; Check valve 7; Bag 9; O-ring 10; O-ring storage groove 11; Container 12: Lid 13; Air hole 21; Piston 22; Cylinder 23; Check valve 24; Liquid supply passage 25; Discharge port 26; Filling nozzle 27; Open / close valve 28; Protrusion o; Ball valve center p; Discharge port tip q; Liquid return position r1; Ball valve radius r2; Cylindrical part radius r3; Enlarged part radius s; Groove part

Front page continuation (72) Inventor Minami Kuwagaki, 339 Noda, Noda, Chiba Prefecture, Kikkoman Corp. (72) Hideyuki Morikawa, Inventor, 785, Setooka, Akigawa, Tokyo Unifrose Co., Ltd.

Claims (4)

[Claims] 1. A valve chamber 3 having a suction port 1 and a discharge port 2,
In a check valve 6 composed of a valve body 4 which reciprocates inside the valve body and a valve seat 5 which is in contact with an outer peripheral surface of the valve body, an enlarged portion 3a is provided in an upper portion of the valve chamber 3 and a predetermined length is provided in a lower portion thereof. A check valve for preventing dripping, characterized in that a cylindrical portion 3b-3c for holding a minute gap g with the outer peripheral surface of the valve body is provided. 2. The anti-drip check valve according to claim 1, wherein the minute gap g is 0.1 to 5.0% in proportion to the radius r1 of the valve body 4. 3. A valve chamber 3 having a suction port 1 and a discharge port 2,
In a check valve 6 composed of a valve body 4 which reciprocates inside the valve body and a valve seat 5 which is in contact with an outer peripheral surface of the valve body, an enlarged portion 3a is provided in an upper portion of the valve chamber 3 and a predetermined length is provided in a lower portion thereof. One end of a pouring nozzle 7 is connected to the suction port 1 of the liquid drop prevention check valve provided with a cylindrical portion 3b-3c for holding a minute gap g with the outer peripheral surface of the valve body, and the other end of the nozzle 7 is connected. Part is inserted into an upper portion of a bag 8 made of a synthetic resin film and containing a liquid therein, and is connected in a liquid-tight manner. 4. The pouring container according to claim 3, wherein the minute gap g is 0.1 to 5.0% with respect to the radius r1 of the valve body 4.