JP2002102120A - Splash-proof device for vacuum sucking machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid contained in a sucking fluid from flowing into a vacuum sucking section. SOLUTION: A valve casing 21 is provided at the lower section of a vacuum sucking section 14. In this case, the valve casing 21 surrounds a suction port 20 to the vacuum sucking section 14, and has an opening 22 on the lower surface. A float valve 27 for which a valve disc 24 and a float 25 are combined is arranged in the valve casing. The valve disc 24 can close the suction port 20 to the vacuum sucking section 14. The float 25 is provided vertically movably together with a liquid surface. A collision plate 28 which collides so that the sucking fluid containing the liquid may not directly go to the suction port 20 is provided between the suction port 20 and the opening 22 of the valve casing 21. Then, a rectifying plate 32 which turns the sucking fluid which changes the direction by the collision plate 28 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum suction machine having a float valve which stores a liquid sucked by a vacuum suction unit in a tank and closes a suction port to the vacuum suction unit by raising a tank liquid level. The present invention relates to an anti-splash device.

[0002]

2. Description of the Related Art Some vacuum suction machines are capable of sucking a liquid, but the conventional treatment of droplets poses a problem. In the conventional method, for example, as shown in FIG. 4, the influence of the droplets is removed by a water filter 9 and the suction port 7 is closed by a float 8 to prevent the liquid from being sucked. However, the water filter has a problem that as the amount of droplets increases, the passing speed increases and the separation capability tends to decrease. Furthermore, as the liquid level approaches the suction port, the ball constituting the float 8 narrows the gap with the suction port, so that the suction flow rate to the suction port increases, and there is a disadvantage that the droplets are easily sucked. .

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and disadvantages, and has as its object to solve the problem that a liquid contained in a suction fluid flows into a vacuum suction unit. It is to prevent that.

[0004]

According to the present invention, there is provided a valve casing which surrounds a suction port to a vacuum suction section and has an opening on a lower surface, provided at a lower portion of the vacuum suction section. A float valve in which a valve body capable of closing a suction port to a vacuum suction unit and a float provided so as to be able to move up and down together with a liquid level is arranged in a valve casing, and a suction fluid including a liquid does not go directly to the suction port. In this manner, the collision plate for collision is provided between the suction port and the opening of the valve casing, and a flow control plate for rotating the suction fluid whose direction is changed by the collision plate is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The splash protection device according to the present invention deals with the treatment of droplets generated when a liquid is sucked by a vacuum suction machine. This vacuum suction device has a float valve that stores the liquid sucked by the vacuum suction unit in a tank and that can close the suction port to the vacuum suction unit by raising the tank liquid level.

In the present invention, the suction port of the vacuum suction unit is preferably an open end of a tubular or tubular portion.
This tubular or tubular portion can be shorter than the conventional water stop pipe (reference numeral 6 in FIG. 4). A float valve is provided to enable the suction port to be closed. A feature of the present invention is that the liquid contained in the suction fluid can be effectively prevented from entering the vacuum suction unit while having such a float valve.

To this end, in the present invention, a valve casing surrounding the suction port to the vacuum suction unit and having an opening on the lower surface is provided on the lower surface of the vacuum suction unit. The opening on the lower surface is an opening for guiding a suction airflow, and the suction airflow flows into the valve casing only from the opening.

[0008] A valve body capable of closing the suction port to the vacuum suction unit and a float provided so as to be able to move up and down together with the liquid level are connected by a valve shaft to constitute one float valve. The rim of the suction port becomes the valve seat, and the valve body contacts there, closing the valve,
When the valve element is separated from the valve seat, the valve is opened. One float valve is arranged in the valve casing, and in the arrangement state, the float valve is guided so that the suction port can be closed.

[0009] The suction plate containing the liquid is caused to collide with the suction port so as not to go directly to the suction port, and the collision plate for adhering the liquid is formed between the suction port and the flow line of the suction fluid flowing into the inside from the opening of the valve casing. It is provided in an intersecting form or in an arrangement that intersects the streamline of the suction fluid. Generally, the collision plate is provided so as to cover the suction port, so that the effect is greater if the collision plate has substantially the same diameter or a larger diameter.

[0010] Furthermore, a flow control plate is provided to swirl the suction fluid that changes its direction due to collision with the collision plate.
When the suction fluid that collides with the collision plate changes its direction almost equally in all directions, the suction fluid becomes a radial flow from the center to the outside in the radial direction. Form. The change to the vortex produces a motion component in the circumferential direction, and the liquid contained in the suction fluid adheres to the inner wall of the casing, so that the amount going to the suction port is reduced to an insignificant level.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a vacuum suction machine 10 to which the present invention is applied. While a wet suction unit 11 can be provided, a dry suction unit 12 that does not require a liquid solution can also be mounted. Wet,
The dry suction units 11 and 12 are selectively used.

The vacuum suction machine 10 has a tank 13 capable of storing sucked liquid and solid debris, and a vacuum suction unit 14 is detachably provided so as to cover an upper end opening of the tank 13. The vacuum suction unit 14 has a so-called high-pressure blower 15 for vacuum suction, and the blower 15 is rotated by a drive source 16 represented by an electric motor. The vacuum suction unit 14 is provided on a base plate which serves as a cover plate 17a for closing the opening of the tank 13 and also serves as a bottom plate 17b of an operation unit provided with the blower 15 and the like. An opening 18 is opened in the lower surface of the central portion, and a suction port 20 for the vacuum suction section 14 is opened at the lower end of the tapered tubular portion 19 surrounding the opening.

A valve casing 21 surrounding the suction port 20 and extending downward is provided on the lower surface of the substrate 17. The valve casing 21 has a large-diameter tapered cylindrical shape, and has an opening 22 at the center of the lower surface through which suction fluid can flow. The valve casing 21 is air-tightly and liquid-tightly attached to the substrate 17 at the upper end, and has a wide space 23 extending above the suction port 20.

A float valve 27 in which a valve body 24 for closing the suction port 20 and a float 25 that can move up and down together with the liquid level are vertically connected by a valve shaft 26 is disposed in the valve casing through the opening 22. The float valve 27 is vertically movably guided by passing a valve shaft 26 through a central shaft opening 29 of a collision plate 28 also serving as a support. The guide plate integrates the collision plate 28 and the float valve 27. The splash-proof float valve can be handled as a unit 30 (see FIG. 2).

The collision plate 28 is attached to the opening 22 by a plurality of support pieces 31 at the lower end. This piece 31
A flow control plate 32 is interposed between the collision plate 28 and
The flow control plate 32 is designed to be eccentric from the central shaft hole 29 so that the suction fluid is swirled to form a vortex as a whole. The support piece 31 is fixed to an inner flange of the valve casing 21. A cage 33 is attached to the valve casing 21 to protect the float 25.

Therefore, when a suction nozzle (not shown) is connected to the connection port 34 provided in the tank 13 and the blower 15 is turned on, a suction fluid containing a liquid is suctioned from the nozzle into the tank, and the liquid is sucked into the tank. It is collected inside, or is sucked by the airflow, and flows into the opening 22. The suction fluid flowing into the opening 22 has a uniform upward flow as a whole. Therefore, the suction fluid collides with the collision plate 28 supporting the float valve 27, loses kinetic energy, and the droplet drops. Here, the suction fluid that has turned outward has a swirling flow due to the flow control plate 32, and the remaining droplets collide with the inner wall of the valve casing 21 and fall. Further, the swirling flow flows into the large space 23 above, and is then discharged out of the machine through the suction port 20.

Even if the amount of liquid stored in the tank increases and the float valve 27 is in a state immediately before closing the suction port 21, the float 25 is sufficiently separated from the valve body 24, The phenomenon that the amount of inflow to 21 is restricted does not occur. Therefore, it is possible to prevent the droplet from flowing into the suction port 21 just before the valve is closed.

[0018]

Since the present invention is constructed and operates as described above, the suction fluid containing the liquid collides with the collision plate arranged so as to close the suction port, and then the swirling flow is caused by the flow control plate. Therefore, it is possible to efficiently collect the liquid droplets by abutting the liquid droplets against the collision plate and the valve casing, and it is possible to effectively prevent the droplets from flowing into the vacuum suction unit. In addition, since the float valve is constituted by the valve element and the float, the flow rate of the suction fluid does not increase even if the liquid level approaches the suction port, so that the state where the droplets are sucked does not reach.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a vacuum suction machine showing a first embodiment of a splash-proof device in a vacuum suction machine according to the present invention.

FIG. 2 is a perspective view showing an example of a float valve unit which is a main part of the present invention.

FIG. 3 is an explanatory view showing the operation of the present invention.

FIG. 4 is an explanatory view showing the operation of a conventional float valve.

Claims (2)

[Claims] 1. A vacuum suction machine having a float valve capable of storing a liquid sucked by a vacuum suction unit in a tank and closing a suction port to the vacuum suction unit by raising a tank liquid level. A valve casing surrounding the suction port and having an opening on the lower surface is provided below the vacuum suction section, and a valve body capable of closing the suction port to the vacuum suction section and a float provided so as to be movable up and down together with the liquid level. Arranged in the valve casing, the float valve combined with the above, while providing a collision plate between the suction port and the opening of the valve casing for causing a suction fluid containing a liquid to collide with the suction port so as not to go directly,
A splash protection device comprising a flow control plate for turning a suction fluid whose direction is changed by an impact plate. 2. The float valve is vertically movably guided by passing a valve shaft through a central shaft opening of a collision plate also serving as a support, and the guide mechanism integrates the collision plate with the float valve. 2. The splash prevention device in a vacuum suction machine according to claim 1, wherein the splash float valve can be handled as a unit.