JPH11104408A - Filter for liquid treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To require no tool for turning a drain plug for liquid removal and realize the removal of a liquid without removing the plug from a case when using a filter for liquid treatment. SOLUTION: A second pipe part 14 for supporting a filtration element 13 is provided in the center of the bottom part of a lower part case 12, in a filter F for liquid treatment. Further, the second pipe part 14 is formed of a small dia. part 14a with a female thread, a medium dia. part 14b with a shoulder 14f for receiving the filtration element 13 and a large dia. part 14c which protrudes downward from the bottom of the case 12. In addition, a through hole 14g is provided in a border part between the medium dia. part 14b and the large dia. part 14c. Further, the second pipe 14 has a center hole 15d and is set in place by screwing a drain plug 15 which is made up of a small dia. part 15a with a male thread, a medium dia. part 15b which is introduced into the medium dia. part 14b of the second pipe part 14 and has window hole 15f communicating with the center hole 15d and further has a packing 15g provided on the outer periphery, and a downwardly extending large dia. part 15c having a horizontally spreading handle 15h which hermetically seals the large dia. part 4c of the pipe part 14. The liquid contained in the case 12 is removed from the center hole 15d by turning the plug 15 with the handle 15h and causing the window hole 15f to coincide with the through hole 14g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for purifying an engine lubricating oil or fuel, a machine tool lubricating oil, etc., and more particularly to a liquid filter having an improved drain portion.

[0002]

2. Description of the Related Art An example of a liquid filter used so far for purifying lubricating oil and fuel in an engine is shown in FIG. 5, and an upper case 1 attached to an engine block or the like and a cup are provided. Lower case 2
And a filtration element 3 housed therein.
The upper case 1 is a casting such as cast iron, aluminum casting, aluminum die cast, etc., and has a lid shape having an inflow passage 1a and an outflow passage 1b for liquids such as lubricating oil and fuel.
The lower case 2 is made of an iron plate, and an annular inner plate 2a is welded to an open end to hold a flexible packing 7a made of rubber or the like so as to abut against the upper case 1, and a center is provided at the center of the bottom. A block body 2b for bolt insertion is welded, and a dish-shaped retainer plate 2c is welded to the lower surface of the bottom. The drain plug 5 is screwed in to close the opening 2e.

The filter element 3 is formed by pleating or laminating filter paper or nonwoven fabric in a chrysanthemum flower shape (in the figure, a chrysanthemum flower shape), and a porous tube 3b is inserted into a filter medium 3a formed in a tubular shape.
An end plate made of an iron plate, a synthetic resin, or a non-woven fabric is attached to the upper and lower ends thereof, and an eyelet-shaped packing 7b is provided in a center hole portion, and is placed on the block 2b of the lower case 2. A coil spring 8 for supporting the element is provided, a center bolt 4 is inserted through the block body 2b, and the filter element 3 is inserted into the center bolt 4, and then the distal end is screwed into the upper case 1.
The upper and lower cases 1 and 2 and the filtration element 3 are integrally connected.

In use, lubricating oil or fuel is taken into the lower case 2 from the inflow passage 1a, is purified by crossing the filtration element 3 from the periphery, and exits to the center.
It is sent to the engine side or the like through the outflow passage 1b through the internal through hole of the center bolt 4.

[0005]

When the filter medium 3a is clogged after a lapse of a predetermined time, first, the drain plug 5 is removed from the wedge piece 6, and the lubricating oil or fuel contained in the case is discharged. Then, by unscrewing the center bolt 4 and uncoupling the upper and lower cases 1 and 2,
The filter element 3 needs to be replaced. However, since the drain plug 5 of the conventional filter is a simple bolt type, it requires a tool such as a wrench to unscrew and tighten it. The entire drain plug 5 must be manually removed and attached from the bridge 6, which requires time and effort. When the drain plug 5 is further removed, the dirty liquid in the case may become dirty as indicated by the solid arrow. As a result, the fluid flows out from the drain opening 2e and the screw piece 6, and the hands and clothes of the worker are soiled.

Therefore, the present invention does not require a tool for rotating the drain plug when taking out the liquid from the case, does not require removal of the drain plug, and is simple in operation. It is an object to prevent contamination of the object.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a filter for treating liquids such as engine lubricating oil and fuel, and machine tool lubricating oil. An upper case having a first downward pipe portion having a central path connected to the lower case, a lower case having a second upward pipe portion screwed into the upper case, and a cylindrical filtration element housed therein. The filter element is supported by the first and second pipe portions of the upper and lower cases, and the second pipe portion of the lower case is formed of a small-diameter portion having an internal thread and a shoulder portion for receiving the filter element. It is formed of a hollow portion provided and a large diameter portion projecting downward from the bottom of the case, and a plurality of through holes are provided at a boundary portion between the middle diameter portion and the large diameter portion, and a center hole is formed in the second pipe portion. Equipped with small diameter section with male thread and middle diameter section of pipe The drain plug consists of a hollow part that has a window hole that is inserted into the center hole and has a packing on the outer periphery, and a large-diameter part that extends downward from the bottom of the case with a packing on the outer periphery and a handle that extends horizontally in the center and has a packing that extends horizontally. , Which are screwed and attached via the small diameter portion.

[0008]

1 to 3 show an example of a liquid processing filter F according to the present invention. An upper case 11 and a cup-shaped lower case 12 attached to an engine block or the like are made of a casting (aluminum, aluminum, etc.). The upper case 11 is made of aluminum die cast, cast iron or the like or synthetic resin (nylon, polypropylene or the like) and has an inflow passage 11d and an outflow passage 11e, and a main body 11a attached to an engine block or the like, and a center connected to the outflow passage 11e. A downward first pipe portion 11c having a passage 11f and supporting the upper end of the filtration element 13, and a peripheral wall portion 11b having a female screw 11g provided inside.
It consists of a hat.

On the other hand, the cup-shaped lower case 12 is provided with an external thread 12a on the outer periphery of the open end so as to be screwed into the upper case 11, and a flexible sealing material such as rubber is provided below the external thread. A packing 12c is mounted, and in the center of the bottom, an upwardly-facing second pipe portion 14 for supporting the lower end of the filtration element 13 and extracting internal liquid.
, And a drain plug 15 described later is attached thereto.

As shown in FIG. 2A, the second pipe portion 14 has a small-diameter portion 14a provided with a female screw 14e on the inside and a medium-diameter portion 14b provided with a shoulder 14f for receiving a filtration element.
And made from the large diameter portion 14c that protrudes downward from the case bottom, the elastic sections 14d for retaining the filter element which is cut-split into a plurality on the end wall 14a ₁ of the small diameter portion 14a is provided (if case of the casting Is provided with a retaining member as a separate part), and a middle diameter portion 14b and a large diameter portion 14c are attached.
At the boundary portion with the bottom case 12, ie, along the bottom of the lower case 12, a through hole 14g divided by a plurality of strips 14h is provided,
A plurality of ribs 12b are formed on the bottom of the case from the middle diameter portion 14b.
Are radially provided, and the outer shape of the large diameter portion 14c is formed in a polygonal shape so that the lower case 12 can be easily rotated with respect to the upper case 11.

On the other hand, as shown in FIG. 2B, the drain plug 15 has a male thread 15e on the outer periphery and is screwed into the small diameter portion 14a of the second pipe portion 14; Medium diameter part 1 inserted in diameter part 14b
5b, and a large-diameter portion 15c fitted into the large-diameter portion 14c of the second pipe portion 14. A central through-hole 15d is provided in two stages, large and small throughout the entire length. A window hole 15f communicating with the center through hole 15d is provided in a ceiling portion of the middle diameter portion 15b corresponding to a lower side of the small diameter portion 15a so as to cross the axis, and an outer peripheral center portion of the middle diameter portion 15b and an outer periphery of the large diameter portion 15c. A packing 15g is attached to the upper end so as to be sandwiched between two beads, the large diameter portion 15c extends long downward, and a pair of wing-like handles 15h extending obliquely and horizontally is provided near the upper portion thereof. ing.

Then, the drain plug 15 is inserted into the second pipe portion 14 and the small diameter portions 14a, 15a of the two are screwed together, as shown in FIG.
a ₁ serves as a stopper, in which case the packing 15g on the outer periphery of the drain plug middle diameter portion 15b is connected to the pipe middle diameter portion 1b.
4b while being pressed against the inner surface of the drain plug large diameter portion 15c.
The outer packing 15g is pressed against the inner surface of the second pipe large diameter portion 14c to block the through hole 14g of the second pipe portion 14 from communicating with the outside.

The filter element 13 is made of a filter paper and a non-woven fabric which are folded into a chrysanthemum or laminated (in the figure, a chrysanthemum) in the same manner as the above-mentioned conventional filter element. An annular end plate 13c made of an iron plate, a synthetic resin or a non-woven fabric is attached to the upper and lower ends thereof, and an eyelet-shaped packing 13 is provided in the center hole thereof.
d is attached.

The upper and lower cases 11, 12 and the filter element 13 are first inserted into the lower case 12, and the eyelet-like packing 13d of the lower end plate 13c is connected to the second pipe at the bottom of the case. Small diameter part 14a of part 14
A plurality of sections 14d are fitted and inserted while narrowing the
b, and then the packing 13d of the upper end plate 13c is attached to the first pipe portion 11c of the upper case 11.
The male screw 12a on the outer periphery of the lower case 12
Into the female screw 11g of the upper case peripheral wall 11b,
It is used by connecting the upper and lower cases 11, 12 and the filtration element 13 to each other, and assembling the main body 11a of the upper case 11 at a predetermined place such as an engine block.

In use, liquids such as lubricating oil and fuel enter the peripheral portion of the lower case 12 from the inflow passage 11d of the upper case 11, and are purified by passing through the filtration element 13 to be collected at the central portion. Central road 1 of 11c
It flows to the engine side and the like through 1f and the outflow path 11e.

However, when the filter element 13 is replaced due to clogging with the passage of time, the liquid contained in the case is first removed, and then the lower case 12 is removed.
In this case, when the drain plug 15 attached to the center of the bottom of the lower case 11 is rotated several times in the loosening direction via the wing-shaped handle 15h, As shown in FIG.
From the small diameter portion 14a of the pipe portion 14 to the drain plug small diameter portion 1
5a is unscrewed, the drain plug 15 is lowered, the packing 15g on the drain plug 15b is disengaged from the middle diameter portion 14b of the second pipe, and the window hole 15f of the drain plug is aligned with the through hole 14g of the second pipe portion. Drain plug large diameter part 15
c The packing 15g at the upper end is still the second pipe large diameter portion 14.
c, the inner surface of the case is sealed,
From the through hole 14g of the pipe portion 14 to the middle diameter portion 15 of the drain plug
b, flows down through the center hole 15d through the window hole 15f, and is taken out to a container or the like placed below the drain plug 15.

At this time, the large diameter portion 15c of the drain plug 15
Extends below the bottom of the case, and the handle 15
Since h opens sideways above the lower end of the large diameter portion 15c, dirty liquid does not splash on the hands or clothes of the operator who operates it. If a hose is connected to the large-diameter portion 15c of the drain plug via a bead at the tip to take out the liquid, the operation can be performed more cleanly and efficiently.

When the liquid inside the case is taken out, the drain plug 15 is screwed again, and in this state, the lower case 12 is unscrewed and separated from the upper case 11, and the filter element 13 inside is removed. As described above, the upper and lower cases 11 and 12 are connected by replacing with a new one.

In the above example, when the drain plug 15 is screwed into the second pipe portion 14, the second pipe portion 14
The upper end wall is used as a stopper. However, the present invention is not limited to this, and as shown in FIG.
5i is brought into contact with the lower end of the large-diameter portion 14c of the second pipe portion, or as shown in FIG.
Square wall of the pipe 15b
May be brought into contact with the inner surface of the shoulder 14f. The center hole 15d may not have a portion above the window hole 15f.

[0020]

The present invention is configured as described above as a filter for treating liquid such as engine lubricating oil and fuel, machine tool lubricating oil, etc., so that the drain plug is loosened when the filter element is replaced. There is no need to use a tool such as a wrench for returning and tightening, so you can work smoothly just by turning the handle by hand, and you do not need to remove the drain plug from the case, just turn the handle that spreads sideways slightly The liquid in the case can be efficiently removed, and there is no danger of the worker's clothes and hands being stained with the liquid.

[Brief description of the drawings]

FIG. 1 is a sectional view of one side of a liquid processing filter according to the present invention.

FIG. 2A is a sectional view of a second pipe portion in a lower case. (B) is a side view of the drain plug.

FIG. 3 is a sectional view showing a state in which a drain plug is slightly unscrewed from a second pipe portion.

FIG. 4A is a sectional view of an example in which a stop state of a drain plug with respect to a second pipe portion is changed. (B) Cross-sectional view of another example in which the stop state of the drain plug is changed.

FIG. 5 is a half sectional side view of a conventional liquid processing filter.

FIG. 6 is a partial cross-sectional view of a case bottom with a conventional drain plug removed.

[Explanation of symbols]

 Reference Signs List 11 Upper case 11a Main body 11b Peripheral wall 11c First pipe 11d Inflow 11e Outflow 11f Center 12 Lower case 13 Filtration element 13a Filter media 14 Second pipe 14a Small diameter 14b Medium diameter 14c Large diameter 14f Shoulder 14g Through hole 15 Drain plug 15a Small diameter portion 15b Medium diameter portion 15c Large diameter portion 15d Center hole 15f Window hole F Filter

Claims (1)

[Claims] 1. An upper case having a downwardly directed first pipe section having a center path connected to a liquid inflow path, an outflow path and an outflow path, and a second upwardly threaded bottom pipe section screwed to the upper case. A lower case, and a tubular filtration element housed in the lower case. The filtration element is supported by a first pipe portion and a second pipe portion of the upper and lower cases, and a second pipe portion of the lower case. Is formed by a small-diameter part having a female thread, a hollow part having a shoulder for receiving a filtration element, and a large-diameter part projecting downward from the case bottom. A hole having a center hole, a small diameter portion having a male thread, a middle diameter portion having a window hole inserted into the middle diameter portion of the pipe and leading to the center hole, and having a packing on the outer periphery; Packing on the upper perimeter and spreads horizontally in the center A filter for liquid treatment, wherein a drain plug having a large diameter portion extending downward from a case bottom with a handle is screwed and attached through the small diameter portion.