JP2001004125A - Manufacture of oil/water separation filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an oil/water separation filter for a fuel used for a burner of a petroleum combustor. SOLUTION: Synthetic resin having a water repellant property as a raw material of a filler is employed to separate oil and water, and which resin is formed into powder with particle diameters adjusted only between 30 to 50 μm. The synthetic resin powder 1 is filled intactly in a mold which is manufactured so as to form an oil/water separation filter with predetermined thickness, and is integrally formed by keeping for a predetermined time temperature where contact surfaces of the synthetic resin powder 1 filled as above can be polymerized as molecules. For the synthetic resin taken out from the mold has a filtration space of an uniform air gap 1a formed with a powder having a particle size of 30 to 50 μm whereby there can be manufactured an oil/water separation filter having the oil/water separation function and filtrating function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an oil / water separation filter for a fuel used in a burner of an oil combustor.

[0002]

2. Description of the Related Art In an oil combustor, fuel from an oil tank is sucked up by a fuel pump and supplied to a burner. When dust or moisture mixed in the oil tank is sucked into the fuel pump, a fuel pipe or spray is sprayed. The nozzle may become clogged or rust, making the fuel pump unusable. For this reason, the fuel pipe is provided with an oil-water separation filter and a filtration filter.

[0003] Generally, a filter for fuel is formed by refining a net made of metal or synthetic resin, or a paper having a permeation property, into a flat shape or a tubular shape, or by bending it into an uneven shape. Some are finished in a tubular shape, and the filter material is 2
It is possible to manufacture a fine mesh of about 00 mesh. Then, a filter material using oil-only paper with this permeation performance was impregnated with a water-producing material containing silicon as a main component, so that an oil-water separation filter was constructed to have water repelling performance. There is something.

In addition, a filtration filter attached to the inlet side of a spray nozzle, which is likely to be heated to a high temperature, of a pressure spray burner, recently presses approximately 0.5 mm particles made of bronze to locally add particles. There is a type which is formed by pressure deformation to be integrated, and is used as a filtration filter.

[0005]

However, if water is mixed in the fuel of the oil combustor, clogging of the fuel pump, the spray nozzle, etc. occurs, causing serious trouble. For this reason, it is indispensable to attach an oil-water separation filter. However, when a filter is also used as the oil-water separation filter, conventionally, a water-based material mainly containing silicon is impregnated into an oil-only filter made of paper as a raw material. What has been commercialized.

[0006] However, the filtration filter which has been subjected to this water generation treatment is poor in durability because water generation material is removed during use.
It is impossible to maintain water performance for a long time. For this reason, it is necessary to always replace the filtration filter, but it is almost impossible to accurately specify the replacement time. In many cases, it caused trouble when used, and was inconvenient.

Further, when water is applied to a filtration filter formed of a metal mesh, the water-producing material adheres to the surface of the filter material without penetrating. In this state, the water-producing material is filtered. Filling the gaps makes it impossible to filter,
In the end, such a filter material made of metal cannot perform a water discharge treatment, so that troubles caused by water cannot be avoided.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a method for producing an oil-water separation filter which also serves as a filter suitable for a petroleum combustor capable of maintaining water repellency for a long period of time. The synthetic resin is formed into a powder form, and the synthetic resin powder is adjusted to a particle diameter of 30 to 50 microns, and the synthetic resin powder is filled in a mold capable of being formed into a predetermined thickness, and the contact of the synthetic resin powder is performed. By maintaining a temperature at which surfaces can be polymerized for a predetermined period of time and forming them integrally, forming a uniform filtration space by the gaps between the synthetic resin powders, it has water repellency without requiring any special post-treatment. The filter was manufactured.

Further, the mold for filling the synthetic resin powder is configured so that the surface on the inflow side of the filter is finished to a smooth surface, and water and dust adhering to the oil / water separation filter are easily peeled off by the smooth surface. Thus, a durable oil-water separation filter was manufactured.

[0010]

[Function] Synthetic resin can be manufactured from rice-sized pellets to fine powder for use in injection molding. Among them, like polyethylene, etc., water-repellent performance after material is wet with oil. Is obtained. According to the present invention, such a water-repellent synthetic resin powder is adjusted to a specified size, the powder is directly filled into a mold, and a predetermined temperature is applied, so that only the contact portion of the synthetic resin powder is heated to undergo molecular polymerization. The synthetic resin powder is completely melted and does not fill the mold,
Since only the contact portion is polymerized, voids are formed between the particles, and an oil-water separation and filtration filter can be manufactured.

Further, by using a synthetic resin powder whose particle diameter is adjusted to 30 to 50 microns, the gaps between the particles are uniform and uniform, and the water adhering to the synthetic resin particles fills the gaps. As a result, the filter material can be made water-repellent without special water treatment afterwards. In addition, since the water generating effect is obtained from the properties of the synthetic resin, no deterioration occurs.

Further, the mold for filling the synthetic resin powder has a smooth surface on the inflow side of the filtration filter, so that the surface of the oil-water separation filtration filter becomes smooth and the passage of the filter is stopped. Dust and water are easily removed and can be easily cleaned, and can be used for a long time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional filter used in a fuel flow path such as a burner of an oil combustor is a filter, and water which is mixed in fuel cannot be processed by the filter. The only commercially available filter of this type that can prevent the passage of water is to impregnate a filter material using paper with a water-producing material mainly composed of silicon. There is an oil-water separation filter having water repelling performance.

By using the oil-water separation filter having this structure, water and dust can be filtered at the same time. However, this filter is bent and joined using paper as a material. Since the water treatment process is required after the material is completed, the production cost is increased. In addition, the impregnated water-producing material loses its water-producing material when used for a long period of time, and has a serious problem in terms of durability because a joint portion with a component for fixing the paper filter material is easily detached.

[0015] Such a conventional oil / water separation filter is very unsatisfactory, and the present invention solves this problem. Conventional filtration filters include those made of a net made of wire mesh or synthetic resin, and those made of paper or the like with permeation performance.However, as filtration filters attached to fuel spray nozzles for oil combustors, The bronze particles are heated to a certain temperature so as to be easily deformed, and the particles are pressed by a press, and the bronze particles are united while partially deforming to form a thick metallic filter. Some filters are finished.

This filter is intended to collect dust that cannot be passed through because it is caught by the spray nozzle. Therefore, this filter is intended for large dusts. For example, when pressurized, the fine particles are crushed and voids cannot be formed, and when the press pressure is reduced so that voids can be formed, the bronze fine particles come off and do not function as a filtration filter. With this technique, it was not possible to produce a uniform and fine filter material corresponding to a wire mesh of 200 mesh.

The present invention focuses on a synthetic resin capable of forming fine particles instead of bronze particles, and further has an oil-water separation and filtration function using a synthetic resin having water repellency as a synthetic resin to be used. A filter 1 is made of a synthetic resin having a water-repellent property, such as polyethylene or polypropylene. The synthetic resin powder 1 as a material of the filter is 30 to 50 in advance.
The size is adjusted only to those with a micron particle size. And
The synthetic resin powder 1 is injected and filled so as to spread all over the mold by applying low pressure in the state of powder, and then the optimum temperature determined by the type of the synthetic resin powder 1 is maintained until the contact surfaces can be molecularly polymerized. The particles of the synthetic resin powder 1 are molecularly polymerized on the contact surfaces to form a filter material by a completely new method of holding for a predetermined time.

Reference numeral 1a denotes a space between the synthetic resin powders 1 formed by molecular polymerization on the contact surface of the synthetic resin powder 1, and the space 1a is uniformly formed in a lump of the synthetic resin formed by the mold. The entire resin functions as a filter material. When the size of the synthetic resin powder 1 to be used is adjusted to the range of 30 to 50 microns specified in the present invention, the contact space between the powders having this particle diameter forms a filtration space by the voids 1a formed by molecular polymerization. The size is about 300 mesh in terms of a wire mesh. In addition, since the synthetic resin powder 1 forms a filter material with a constant thickness by a mold, there is no linear filter-like filtering space, such as a wire mesh, and only oil can be reliably filtered. .

Further, polyethylene, polypropylene and the like have water repellency as a raw material, and the particle diameter of the synthetic resin powder 1 is specified by the present invention using the water repellent material.
When the water is adjusted to 0 to 50 microns, water adheres to the water-repellent synthetic resin particles when water tries to pass through the voids 1a between the particles while mixing with the oil.
It fills a and stops the passage of water.

The powder 1 is larger than the diameter specified in the present invention.
If the particle diameter of the filter material becomes large, the gap 1a becomes large and it becomes impossible to prevent the passage of water, and water penetrates into the interior of the filter material and passes along with the oil. On the other hand, if the particle diameter of the synthetic resin powder 1 is smaller than 30 microns, the passage of oil as well as the passage of water is suppressed, and the function as a filtration filter becomes insufficient.

Further, since the filter of the present invention uses powder 1 of a synthetic resin having a water-repellent property as a material, a special manufacturing process for water-repellent treatment is not required. However, even with paper, a great deal of effort has been made to improve the accuracy of the filter mesh, and this has rebounded to the price of the filter. The accuracy of the filter material is determined by the selection of the particle size of the powder 1, and a high-performance filtration filter having excellent durability and very low cost can be manufactured in large quantities.

The filter material in which the contact surfaces of the synthetic resin powder 1 taken out of the mold are formed by molecular polymerization by heating is exactly the same as a synthetic resin part formed by injection molding. Far from the concept, it is a finish that nobody will notice unless it is pointed out that it is a filter. Also, since the filtration filter material itself can be treated as a part made of synthetic resin, the structure used for mounting general synthetic resin parts can be diverted to enable the smart installation of a filtration filter with an oil-water separation function. Therefore, such a mounting method is impossible with a conventional filter, and is not performed at all.

Furthermore, since the mold of the present invention is configured such that the surface on the inflow side is finished to be a smooth surface when molded into a filter, the filter manufactured by this method is compatible with a synthetic resin member formed by injection molding. Since the external appearance and feel of the filter remain unchanged and the outer surface of the filter is smooth, dust and water adhering to the filter can be cleaned very easily as compared with wire mesh or paper filter materials.

As described above, the oil-water separation and filtration filter 1 manufactured according to the present invention can be finished in any shape by changing the shape of the mold, and can be made of synthetic resin parts manufactured by general injection molding. It has the same hardness and can be treated in exactly the same way.

In the drawing showing the state of use, reference numeral 2 denotes a bottomed cylinder made of a synthetic resin powder 1 as a raw material and made of a filter material having a fixed thickness, and 3 denotes a close contact with an opening of a bottomed cylinder 2 which is a filter material. The cover 4 is a fuel pipe for supplying fuel to the oil combustor.

Reference numeral 5 denotes a communication hole provided in the lid 3 of the bottomed cylindrical body 2, reference numeral 5a denotes an O-ring mounted inside the communication hole 5,
2 is an oil tank of an oil combustor. In the embodiment shown in FIG. 2, the bottomed cylinder 2 and the lid 3 are integrated with each other in the outer peripheral direction of the communication hole 5. Tank 6
A communication hole 5 of the lid 3 is fitted to the end extending toward the inside, and the airtightness between the oil supply pipe 4 and the oil supply pipe 4 is maintained by an O-ring 5a.

Reference numeral 7 denotes a fuel pump mounted in the middle of the fuel supply pipe 4. The fuel pump 7 sucks fuel by a fuel pipe extending into the bottomed cylinder 2, and contains fuel and dirt. When passing through the bottomed cylinder 2, the fuel that has been filtered and becomes clean can be sent to an oil combustor.

FIG. 3 showing the state of use is an embodiment in which a filter is incorporated in a filtering device provided in the middle of a fuel pipe 4 drawn out of an oil tank 6, and 8 is a strainer constituting the filtering device, 8a. Is a transparent filter cup of the strainer 8, and the frame of the strainer 8 is a lid 3 that connects an oil supply pipe 4 continuous to the oil tank 6 and the oil combustor side.
And a filter cup 8a, and a communication hole 5 connected to the oil supply pipe 4 on the oil combustor side is located at the center of the lid 3.

Reference numeral 9 denotes an opening / closing valve incorporated in the lid 3 and provided in an oil flow path from the oil tank 6 to the filter cup 8a of the strainer 8. Reference numeral 10 denotes an oil flowing through the opening / closing valve 9 into the filter cup 8a. Hole.

Reference numeral 3a denotes a ring-shaped screw portion which is located in the outer peripheral direction of the communication hole 5 of the lid 3 and separates the communication hole 5 and the inflow hole 10; 2a denotes a bottomed cylinder at the opening end of the bottomed cylinder 2; The fixed screw portion 2a of the bottomed cylindrical body 2 is a fixed screw portion integrally formed when the body 2 is formed, and the fixed screw portion 2a of the bottomed cylindrical body 2 formed by molecularly polymerizing the contact surfaces of the synthetic resin powder 1 by heating. The bottomed cylinder 2 which is screwed together to form an oil-water separation filter is mounted in the filter cup 8a, and the oil in the oil tank 6 flows from the inflow hole 10 into the gap between the filter cup 8a and the bottomed cylinder 2. The oil filtered and passed through the bottomed cylindrical body 2 is sent from the communication hole 5 to the oil supply pipe 4.

For this reason, dust and water contained in the oil sent from the oil tank 6 cannot pass through the bottomed cylinder 2 and accumulate in the filter cup 8a. Therefore, the filter cup 8a is removed from the lid 3 and discarded. Can be.

As described above, the bottomed cylindrical body 2 formed by polymerization of the contact surfaces of the synthetic resin powder 1 produced according to the present invention is as rigid as a synthetic resin part obtained by conventional injection molding. Since the strength can be expected, if the shape of the mold is formed in advance so that the fixing screw 2a can be formed at the end of the bottomed cylinder 2, the bottomed cylinder 2 having the fixing screw 2a can be easily formed. Therefore, if the fixing screw portion 2a is attached to the screw portion 3a of the lid 3 attached to the fuel pipe 4, the bottomed cylindrical body 2 as a filter material can be easily attached to the lid 3. It is a thing.

Further, even if the bottomed cylinder 2 is not provided with the fixing screw portion 2a, if the end face of the synthetic resin material is heated to a high temperature, the bottomed cylinder 2 can be locally melted and joined to the lid 3. Can,
The lid 3 and the bottomed cylinder 2 can be easily integrated.

[0034]

As described above, in the type in which the oil-water separation filter and the filtration filter are combined, the filter is made by impregnating a filter made of paper with a water generating material such as silicon. The oil-water separation filter removes water-producing material during use, and cannot maintain the expected oil-water separation performance and filtration performance for a long time.

On the other hand, according to the present invention, a synthetic resin having water repellency is formed into a powder as a filter material, and a synthetic resin powder adjusted to a predetermined particle size is filled in a mold capable of being formed into a predetermined thickness. Since the contact surfaces of the synthetic resin powder were molecularly polymerized by a suitable temperature treatment, the internal contact surfaces of the synthetic resin powder joined together without dissolving the whole, forming voids between the particles, and the filter was completed. Things.

The synthetic resin constituting the oil-water separation filter is a water-repellent material, and the particle diameter is adjusted to 30 to 50 microns. Therefore, the size of the void formed when the synthetic resin powder is polymerized is It is determined by the particle size of the resin powder, and when water tries to pass through the voids, the water adheres without wetting the surface of the synthetic resin particles, and this water blocks the voids and prevents the passage of water. In addition, since this stopping power is a property of the synthetic resin powder 1, it does not change.
For the first time, a durable oil-water separation filter has been put to practical use.

Further, since the synthetic resin powder functioning as a filter has a predetermined thickness formed by molecular polymerization of the contact surfaces, it is stronger and less deformable than a conventional filter material manufactured by a mesh. Although the conventional mesh-laid filter easily passes fine and long fibrous dust, the filter of the present invention not only does not allow water to pass, but also does not form a filtration gap that is continuous in a straight line. Can collect garbage.

The material constituting the filter has a particle size of 3
It is a synthetic resin with water repellency adjusted to 0 to 50 microns, and it can be easily manufactured mainly by only heat treatment. Therefore, it is very inexpensive compared to conventional products made by complicated processes. This is a very practical invention that has a full-fledged filter function for water and a filter function for dust.

Further, since the mold of the present invention is configured such that the surface on the inflow side is finished to be a smooth surface when molded into a filter, the filter manufactured by this method is compatible with a synthetic resin member formed by injection molding. The appearance and feel are the same, and if not pointed out, the filter is incredible, and the outer surface of the filter is smooth. Therefore, it is easy to clean dust and water attached to the oil-water separation filter. It is very easy compared to wire mesh or paper filter material.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of an essential part of an oil-water separation and filtration filter produced by a production method of the present invention.

FIG. 2 is a sectional view showing a state where the oil-water separation and filtration filter produced by the production method of the present invention is mounted on an upper plate of an oil tank.

FIG. 3 is a sectional view of a main part showing a use state in which the oil / water separation and filtration filter produced by the production method of the present invention is incorporated in a strainer of an oil tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synthetic resin powder 1a Air gap 2 Bottomed cylindrical body 2a Fixing screw part 3 Lid 3a Screw part 4 Oil supply pipe 5 Communication hole 5a Owl 6 Oil tank 7 Fuel pump 8 Strainer 8a Filter cup 9 Open / close valve 10 Inflow hole

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B29C 67/20 C08J 5/00 CES C08J 5/00 CES C08J 3/12 Z // C08J 3/12 B01D 35/02 E B29K 23:00 B29L 31:14 C08L 101: 00

Claims (2)

[Claims] 1. A synthetic resin having water repellency is formed into a powder as a material of a filter, and the synthetic resin powder is adjusted to a particle diameter of 30 to 50 microns, and the synthetic resin powder is formed into a predetermined thickness. An oil-water separation filter in which the contact surfaces of the synthetic resin powders are filled into a mold and formed at a temperature at which the molecular surfaces of the synthetic resin powders can be polymerized for a predetermined period of time, and a uniform filtration space is formed by the gaps between the synthetic resin powders. Manufacturing method of over-filter. 2. The method for producing an oil-water separation filter according to claim 1, wherein the mold filled with the synthetic resin powder has a smooth surface on the inflow side of the filter.