JPH0720480U - Automatic drainage device for air filters - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the manual draining operation. [Composition] While air is flowing into the bowl 11,
When the air pressure is received on the upper surface of the pressure receiving plate 23, the valve rod 18 moves downward, and the enlarged diameter step portion 21 causes the drainage port 1 of the seat 13.
4, the drainage port 14 is closed by being pressed against the upper edge of the bowl 4, and the removed water is stored on the bottom surface of the bowl 11.
When the inflow of air is stopped and the inside of the bowl 11 is opened to the atmosphere, residual pressure acts on the lower surface side of the pressure receiving plate 23, so that the valve rod 18 is lifted and the drain port 14 is opened as shown by the chain line. The water accumulated on the bottom surface of the bowl 11 is automatically discharged. Apart from that, the valve rod 18 is fitted with its lower end protruding from the lower end of the drain port 14, so that the valve rod 1
By pushing up the lower end of 8 with a finger or the like as shown by the arrow, the drain port 14 is immediately opened and the water is manually drained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for automatically discharging water accumulated in a bowl of an air filter.

[0002]

[Prior art]

 First, the structure and operation of the air filter will be described with reference to FIG. 1 showing an embodiment of the present invention. On the lower surface of the body 1 having the air inlet 2 and the air outlet 3 formed on both sides, a bowl a accommodating a filter assembly 4 having a cylindrical filter element 5 mounted thereon is attached, and the air is introduced into the inlet. When flowing in from 2, the air is sent to the outside of the filter element 5 as a unidirectional swirling flow by passing through the louver 6 provided in the annular space between the bowl a and the filter element 5, and is mixed into the air. The generated water is separated by the centrifugal force, and the air from which the water has been removed enters the inside of the filter element 5 and then flows out from the outflow port 3 through the passage 8 provided in the stud 7. Flows through the through hole 10 provided in the outer peripheral edge of the baffle 9 at the lower end of the filter assembly 4 to the bottom side of the bowl a and is stored therein. That.

Conventionally, as such an automatic drainage device for an air filter, one shown in FIG. 2 is known. In this device, a sheet c having a drainage port d is screwed to the lower end side of a through hole b formed in the bottom surface of a bowl a, and a valve rod e having a pressure receiving plate f at the upper end is provided above the sheet c. It has a housed structure, and while the air is flowing into the bowl a, the pressure of the air is received by the pressure receiving plate f, the valve rod e is moved downward, and its lower end is pressed against the upper surface of the seat c. As a result, the drain port d is closed, and when the inflow of air is stopped and the inside of the bowl a is opened to the atmosphere, the residual pressure acts on the lower surface side of the pressure receiving plate f, and the valve rod e is lifted up to drain port d. Is opened so that the water accumulated in the bowl a is discharged.

[0004]

[Problems to be solved by the device]

 By the way, when the drainage operation is manually performed in the above-mentioned conventional apparatus, the seat c is moved downward while loosening the screw, but the valve rod e mounted on the seat c is also moved downward together. When the valve rod e is lowered, the enlarged diameter stepped portion g provided in the middle of the valve rod e is locked to the edge of the through hole b of the bowl a to stop it, and the drainage port d is opened for the first time. That is, it is necessary to loosen the screw of the seat c by a considerable amount to move it down before opening the drainage port d, which is troublesome, and further improvement is required to facilitate manual drainage. Was wanted.

[0005]

[Means for Solving the Problems]

 The automatic drainage device for an air filter of the present invention has been devised based on such a requirement, and a sheet having a drainage port is tightly fitted into a through hole formed in the bottom surface of the bowl, and the sheet is attached. The lower end of the valve rod, which has a pressure receiving plate at the upper end and an enlarged diameter part that abuts the upper edge of the drain, is loosely fitted by protruding from the lower end of the drain. And

[0006]

[Action]

 While the air is flowing in, the air pressure is received on the upper surface of the pressure receiving plate, and the valve rod is urged downward, and the enlarged diameter part provided in the middle of the valve rod is located at the upper edge of the seat drainage port. The drainage port is closed by being pressed against and the water is stored on the bottom of the bowl.

When the inflow of air is stopped and the inside of the bowl is opened to the atmosphere, residual pressure acts on the lower surface side of the pressure receiving plate to lift the valve rod, and the expanded diameter portion is located at the upper edge of the drainage port. The drainage port is opened apart from, and the water accumulated in the bowl is automatically drained through the gap between the outer circumference of the lower end of the valve rod and the inner circumference of the drainage port.

Further, since the valve rod is fitted with its lower end protruding from the lower end of the drainage port, the drainage port is immediately opened by pushing up the lower end of the valve rod with a finger or the like, and manual drainage is easily performed. Be seen.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In this embodiment, a polyurethane resin sheet 13 having a drainage port 14 formed in the center thereof is provided in a through hole 12 formed in the center of the bottom surface of the bowl 11, and a flange 15 formed at the upper end of the sheet 13 is provided in the through hole 12. The hose mounting portion 16 provided on the lower end is locked to the upper edge, and the hose mounting portion 16 is projected to the lower surface side of the bowl 11 and is tightly fitted.

The valve rod 18 is made of polyethylene resin, and the valve rod 18 is fitted at its lower end side into the drainage port 14 of the seat 13 with a clearance and has a dimension longer than the drainage port 14. The reduced-diameter portion 19 is formed, and the enlarged-diameter stepped portion 21 that can contact the upper edge of the drainage port 14 is formed at the upper end of the reduced-diameter portion 19.

A flange-shaped pressure receiving plate 23 is formed on the upper end of the valve rod 18. The top surface of the pressure receiving plate 23 is formed into a gentle convex arcuate surface, and the skirt portion 24 that spreads obliquely downward on the outer periphery of the pressure receiving plate 23 and has a thin wall on the tip side to facilitate bending. Is formed, and the outer peripheral edge of the skirt portion 24 is in contact with the inner peripheral surface of the bowl 11.

The reduced diameter portion 19 of the valve rod 18 is fitted into the drainage port 14 of the seat 13 with its lower end protruding from the lower end of the drainage port 14.

Next, the operation of this embodiment will be described. While air is flowing into the bowl 11 to separate water, the air pressure is received by the upper surface of the pressure receiving plate 23, so that the valve rod 18 is downwardly urged and expanded in the middle. The stepped portion 21 is pressed against the upper edge of the drainage port 14 of the seat 13 to close the drainage port 14, and the removed moisture bends the outer peripheral edge of the hem portion 24 of the pressure receiving plate 23, and It flows along the inner peripheral surface of 11 toward the bottom surface and is accumulated.

Since the upper surface of the pressure receiving plate 23 is formed in an arc shape, the water that has dropped onto the pressure receiving plate 23 does not collect there, but also drips toward the outer peripheral side and flows to the bottom side of the bowl 11.

When the inflow of air is stopped and the inside of the bowl 11 is opened to the atmosphere, residual pressure acts on the lower surface side of the pressure receiving plate 23, and the valve rod 18 is lifted as shown by the chain line. At that time, the outer peripheral edge of the thin skirt portion 24 of the pressure receiving plate 23 spreads by receiving the residual pressure and spreads, and closely adheres to the inner periphery of the bowl 11, so that the residual pressure effectively works without air leakage. The rod 18 surely moves up.

As a result, the enlarged diameter step portion 21 of the valve rod 18 is separated from the upper edge of the drainage port 14 to open the drainage port 14, and the outer periphery of the reduced diameter portion 19 of the valve rod 18 and the drainage port 14 are separated. Water accumulated on the bottom surface of the bowl 11 is automatically discharged through the gap between the inner circumference and the inner circumference.

Further, since the lower end of the valve rod 18 is fitted so as to project from the lower end of the drainage port 14, the drainage port 14 is immediately pushed by pushing up the lower end of the valve rod 18 as shown by the arrow. Is opened for easy manual drainage.

[0018]

[Effect of device]

 As described in detail above, according to the present invention, not only is automatic drainage performed well, but manual drainage can also be performed easily and quickly by simply pushing up the lower end of the valve rod. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a conventional example.

[Explanation of symbols]

1: Body 2: Inflow port 3: Outflow port 5: Filter element 11: Bowl 12: Through hole 13: Sheet
14: Drainage port 18: Valve rod 19: Reduced diameter portion 21: Expanded diameter step portion 23: Pressure receiving plate

Claims (1)

[Scope of utility model registration request] 1. A bowl containing a cylindrical filter element is mounted on the lower surface of a body having an inlet and an outlet, and air flowing from the inlet is swirled into an annular space outside the filter element. The water mixed in the air is separated by centrifugal force by sending it as a flow, and the air from which the water has been removed is passed through the inside of the filter element to flow out from the outflow port, and the removed water is put into the bowl. A device for automatically draining water accumulated in the bowl of an air filter, wherein a sheet having a drainage port is tightly fitted into a through hole formed in the bottom surface of the bowl, The drainage port is provided with a pressure receiving plate at the upper end, and a lower end portion of the valve rod having an enlarged diameter portion abutting the upper edge of the drainage port is formed so as to protrude from the lower end of the drainage port. Automatic drainage device for an air filter, characterized in that the loosely fitted.