JPS645196Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a drain discharge device for pneumatic equipment, and is installed in pneumatic equipment such as an air filter to discharge drain accumulated in a pneumatic circuit. used.

(Prior art and its problems) In a pneumatic circuit, it is necessary to remove condensate contained in compressed air. Therefore, for example, condensate is centrifuged by giving a swirling flow to the air within an air filter, and the condensate accumulated in a bowl is discharged manually or automatically.
Conventionally, the drain discharge device used to discharge this condensate is one that opens the drain discharge valve by manual rotation, or a float is suspended in the drain, and the floating force is used to open the subvalve. There are models that open the main discharge valve and then automatically open the main discharge valve, but all of these have relatively complex structures, and automatic models in particular are large, have a high failure rate, and are expensive to manufacture. There was also the problem that it was expensive.

(Means for Solving the Problems) The present invention attempts to provide a drain discharge device with a simple structure in order to solve the above-mentioned problems. A drain hole 6 is provided in the bottom portion 5 of the cylindrical casing 4, and a spherical movable valve body 8 that can close the drain hole 6 is provided inside the casing 4. Furthermore, the inner surface 5a of the bottom portion 5 has an inclination angle with respect to the horizontal plane, and the movable valve body 8 is movable along the bottom portion 5 only in the vicinity of the drain hole 6. When the valve body 8 rolls under its own weight along the bottom 5, the drain hole 6 is automatically opened.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

FIG. 1 is a cross-sectional view of only the drain discharge device 2 of the air filter 1, and the bowl 4 is formed from glass or transparent synthetic resin material into a cylindrical shape with a bottom, and is attached to the filter body 3. . The inner surface 5a of the bottom 5 of the bowl 4 is formed at an appropriate inclination angle with respect to the horizontal plane, for example, about 15 degrees as shown in the figure, and a drain hole 6 is provided in the center thereof passing through in the vertical direction. There is. The upper peripheral edge of the drain hole 6 opens in a smooth rounded shape to form a valve seat 7, and a spherical valve body 8 placed in the bowl 4 fits into this valve seat 7 and abuts from above. ,
It is designed to close the drain hole 6. The valve body 8 is
The surface is elastic like rubber and is configured to have sufficient sealing performance between the valve seat 7 and the valve seat 7.
It is made entirely of rubber or synthetic resin, or it is made of a suitable spherical body whose surface is coated with rubber or the like.

In the free state, the valve body 8 is in contact with the peripheral wall 4a of the bowl 4 without blocking the drain hole 6, as shown by the solid line, but when compressed air flows into the bowl 4, a part of it is shown by the broken line. The air flows out from the drain hole 6 as shown in FIG.
This will close the drain hole 6. In this state, the valve body 8 is pressed against the valve seat 7 by the air pressure within the bowl 4, and this state is maintained. Therefore, when in use, that is, when air pressure is applied in the bowl 4, the drain hole 6 is closed by the valve body 8, and when not in use, that is, when the air pressure in the bowl 4 has decreased, the drain hole 6 is closed. The body 8 rolls along the slope 5a of the bottom 5, the drain hole 6 is opened, and the accumulated drain is automatically discharged.

In the embodiment described above, the valve body 8 is movable along the bottom 5 only in the vicinity of the drain hole 6. Further, although the drain hole 6 is provided in the center of the bottom portion 5, it may be provided in any other suitable position in relation to the movable range of the valve body 8. Also, the drain hole 6 may be provided in an oblique direction instead of a vertical through hole. It may be a horizontal straight hole or a bent hole.

Therefore, if this air filter 1 is installed and used in a place where it receives air pressure when in use and where the air pressure decreases when it is not in use, the drain can be automatically discharged. A preferred example of its use is the golf bag transport device disclosed in Japanese Patent Application No. 139654/1982.
This system uses wheels to run on rails laid on the golf course, and in places where there are no rails, such as between courses, or between courses and clubhouses or garages, the wheels can be retracted and the tires can move on the road. It is designed to run, and uses a single-acting air cylinder that returns to the retracting side using a spring as the mechanism for extending and retracting the wheels. An example of a pneumatic circuit when the air filter 1 of the above embodiment is used in this golf bag transport device is shown in FIG. 2. According to this, compressed air is supplied to the air cylinders 9 when traveling on the lane. Air pressure is applied within the air filter 1 for this purpose, and therefore the valve body 8 is in a state of blocking the drain hole 6 (see FIG. 1). Next, when driving on the road with the wheels 10 retracted by the air cylinder 9, if the motor 11 is stopped and the air pressure is made zero, the valve body 8
rolls along the slope 5a of the bottom 5 and drains into the drain hole 6.
When the valve is opened, the drain D accumulated in the bowl is automatically discharged from the drain hole 6. In addition, the compressor 12 and regulator 1 are shown in Fig. 2.
3 and lubricator 14 are shown, other suitable solenoid valves and tanks may be provided or omitted.

(Effects of the invention) According to the invention, the structure is very simple, there is almost no risk of failure, and it can be manufactured at low cost.
Moreover, since it is small, it can be installed in any pneumatic equipment.

In particular, according to the present invention, drain can be automatically discharged by utilizing the increase and decrease of air pressure in pneumatic equipment, making it an ideal device for pneumatic equipment.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment in which the drain discharge device of the present invention is installed in an air filter, and FIG. 2 is a diagram showing an example of a pneumatic circuit using the air filter of FIG. 1. 1... Air filter (pneumatic equipment), 2... Drain discharge device, 4... Bowl (casing), 5
...bottom, 5a...bottom inner surface, 6...drain hole,
8... Valve body (movable valve body), D... Drain.

Claims (1)

[Scope of utility model registration request] A drain hole is provided at the bottom of the bottomed cylindrical casing through which compressed air flows in, allowing communication between the inside and outside.
A spherical movable valve body capable of closing the drain hole is provided in the casing, and further, the inner surface of the bottom part has an inclination angle with respect to a horizontal plane, and the movable valve body A drain discharge device for pneumatic equipment, wherein the drain discharge device for pneumatic equipment is movable along the bottom portion only in the vicinity of the drain hole.