JPH08103784A - Contact filter medium - Google Patents

Abstract

PURPOSE: To provide a contact filter medium, in which the maintenance work after installation can be reduced, a filtration area can be increased, and by setting the texture thereof, using conditions can be optionally selected, and which can be suspended in the water or the like when formed into a three- dimensional shape so as to be fixed or rotatably disposed. CONSTITUTION: A filter medium has a construction such that front and rear rows of chain stitches tied with connection threads are bent into a folded shape as a whole, or a warp fabric A held in a napped state with respect to a sheet- shaped knitting fabric is wrapped, as an outer cover, around a hollow body 11, which body can be suspended at a proper location or can be disposed rotatably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact filter medium using a warp knitted fabric, and more particularly to the above contact filter medium containing a hollow body and capable of floating in water or the like.

[0002]

2. Description of the Related Art Conventionally, as a filter material for purifying rivers, domestic wastewater, or cleaning with an air purifier, for example, a nonwoven fabric or a crushed stone aggregate is used, or a wire is used as a core material. There are known so-called scrubbing-shaped ones in which tissues are arranged radially,
While widely used, plastic contact materials, non-woven fabric contact materials, synthetic fiber cloth contact materials, string-like contact materials, etc. are used as contact filter materials for decomposing organic substances by microorganisms to purify water.

[0003]

However, since the above-mentioned filter material is generally used in the form of a plane, which is hung from the upper portion in the filtration tank, it is not possible to increase the water content due to typhoon or the like. There is a maintenance inconvenience such as an increase in the resetting cost due to being entangled with or damaged by the filter material of, and in order to increase the filtration area by arranging the fibers radially, the usage form is made into an elongated rod shape. There was a restriction on the form of use.

To further describe, by arranging fibers in a radial manner, microbial groups from the tip portion to the middle portion are purified by decomposing and treating eutrophic nutrients such as aerobic bacteria, and anaerobic bacteria in the central portion. Since it forms a cycle for decomposing and treating carcasses such as surface microbial communities, continuous use causes activated sludge to accumulate from the central part, and eventually the purification ability is significantly reduced by covering the entire fiber structure. There was also a problem in maintenance, such as the occurrence of it, and in the end there was no choice but to wash it manually.

[0005] On the other hand, each of the conventional filter materials that use the filter material has a restriction on the place of installation, and does not consider the decomposition action of organic substances due to the propagation of microbial groups and simply purifies water as a filler material. Nothing more.

The present invention addresses the above-mentioned problems by
Paying particular attention to the use of warp knitted fabrics and the inclusion of hollow bodies, by arranging yarns inside the knitted fabric that are suitable for decomposing the above organic substances and contribute to form stability, the maintenance after installation is reduced and the filtration area is increased. It is an object of the present invention to provide a contact filter medium that can be placed in a fixed or rotatable state and that can be freely selected in a use form by setting a tissue and can float in water or the like by three-dimensionalization. .

[0007]

That is, the feature of the contact filter medium of the present invention which meets the above-mentioned object is that, first of all, a chain stitch line before and after being bound by a binding yarn is applied to a sheet-like knitted fabric. A contact filter medium formed by wrapping a hollow body with a warp knitted fabric held in a napped state as an outer cover.

Further, the present invention is also characterized in that a hollow body is wrapped and formed with a warp knitted fabric in which front and rear chain stitch rows bound together by a binding yarn are bent and formed in a pleated shape as a whole.

The inventions according to claims 3 and 4 specify the kind of the binding yarn in each of the above-mentioned constitutions. The former uses bulky synthetic fiber yarn for the binding yarn, and the latter uses the bulky synthetic yarn. A synthetic fiber monofilament yarn is used in combination with the fiber yarn.

The inventions according to claims 5 and 6 further define a specific use form of the warp knitted fabric having the above-mentioned structure, and the warp knitted fabric is formed into a tubular or bag-like shape, and one or more than one of the plurality of warp knitted fabrics are formed therein. This is a configuration in which the hollow body is wrapped.

The inventions set forth in claims 7 and below are as follows.
As a specific embodiment of the hollow body in the contact filter medium, a spherical frame body such as a rubber ball, a plastic ball, or a hollow plastic spherical frame body is used, and the hollow frame body is contained therein.

[0012]

The above-mentioned contact filter medium of the present invention has a floating property due to the inclusion of a hollow body, and is attached to a fixed weight in water to be placed in a floating state, or attached to a floating substance to prevent the floating substance from rotating. , Rotate freely to allow purification of water while floating in water.

When the warp-knitted fabric is used as a filter medium in contact with sewage of rivers, ponds, etc. in the above-mentioned state, microbial groups adhere to and propagate at the joints and the knitted fabric of the sewage. Purifies water by decomposing organic substances. The binding yarn portion and the ground knitted fabric portion increase the contact area, enhance the adhesion of microorganisms, and improve the purification performance.

When the bulky synthetic fiber yarn is used as the binding yarn, the fiber voids are increased and the contact area is increased, and when the synthetic fiber monofilament yarn is used together, the morphological stability is enhanced.

Further, the number of the hollow bodies is not limited to one, but by incorporating two or more hollow bodies as continuous balls, the contact area is further increased and the purification performance is enhanced.

A hollow body that uses a goblet or the like is suitable for mounting on a fixed weight, while a body that uses a spherical frame body is mounted on a floating object so that the contact surface can be freely rotated. It is suitable for constantly changing and purifying.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show each embodiment of the contact filter medium of the present invention. In FIG. 1, the contact filter medium of the present invention in which a hollow body 11 is included in a warp knitted fabric A is fixed to a fixed weight 12 via a cord body 13. It is connected and can be used fixedly in water.

On the other hand, in FIG. 2, the contact filter material of the present invention, in which the hollow spherical frame 14 is included as a hollow body in the warp knitted fabric A, the two spherical frame bodies 14 are continuously arranged in the warp knitted fabric A to form an enormous volume. Part 1
5 and the narrowed portion 16 are formed and are integrally attached to the lower portion of the floating material 17.

This is because it is possible to freely rotate the contact filter medium in accordance with the floating of floating material 17 in a river or the like and the movement of free rotation so that the contact surface is constantly changed.

In the above construction, however, the warp knitted fabric A enclosing the hollow body 11 holds the sheet knitted fabric 6 in a napped state or a pleated napped state as shown in FIGS. 3 to 5. (See FIGS. 3 and 4) Or a warp knitted fabric A ″ that is bent in a pleated shape as a whole without having a sheet knitted fabric.
(See FIG. 5).

6 to 8 show examples of specific knitting structures of the warp knitted fabrics. Hereinafter, these knitting structures will be described step by step.

FIG. 6 is a structural diagram of the warp knitted fabric A which holds the napped state shown in FIG. 3, and in the figure, 2 and 4 are chain stitch rows which are knitted in the front and rear two rows and extended in the wale direction.
3 is a binding yarn that alternately engages with the opposing loops of the front and rear facing chain stitch rows and is horizontally swung in a zigzag pattern, and binds the chain stitch rows, 1 is the side chain stitch row on the front side that is arranged in parallel Two
With the insertion yarn inserted into the chain stitch structure, the structure of the front chain stitch row 2 is shaken laterally in a zigzag pattern from about 2 courses to about 10 courses to be integrated with the chain stitch organization as shown in FIG. The sheet-like ground knitting portion 6 is formed.

After 5 holds the napped state with respect to the ground knitting part 6 by bundling the binding yarn 3 in the chain stitch row 4 on the rear side, preferably about 2 to 4 courses, by shaking in the lateral direction. Side warp knitted fabric is a side insertion yarn, and with the aid of this napped yarn 5 to hold the napped state, the warp knitted fabric as a whole is formed into a warp knitted fabric A as shown in FIG.

The warp knitted fabric A having the above structure is knitted by the double russel machine, and the front needle row F or the rear needle row B is chain-knitted to knit the front and rear chain stitch rows 2 and 4, respectively. At the same time, the front and rear chain stitch rows 2 and 4 are connected by a binding thread 3 to knit a knitted fabric in a napped state with respect to the ground texture, and the insertion yarn 1 is inserted into the chain stitch row 2 in the front needle row. By knitting in the zigzag shape in the lateral direction for about 2 to 10 courses, the structure of one sheet of fabric knitted fabric 6 is knitted, while on the other hand, in the rear needle row, the insertion yarn 5 is used for about 2 to 4 courses. By tying the binding yarns 3 by shaking in the direction, the napped state of the base knitted fabric 6 is maintained, and the warp knitted fabric A in the present invention is obtained.

The yarn used in the knitting of the warp knitted fabric may be a synthetic fiber yarn such as nylon, polyester or polypropylene, a polyurethane elastic fiber yarn, a natural fiber yarn such as cotton, etc. Any thread that can be set in the machine,
Although arbitrarily selected, a synthetic knitted fabric structure or a chain knitting yarn that binds a binding yarn is a synthetic fiber multi-filament yarn, a binding yarn is a thermoplastic synthetic fiber multi-filament yarn, especially a bulky processed bulk It is preferable to use yarn or synthetic fiber monofilament yarn aligned therewith.

Especially when a monofilament is used for the binding yarn 3, it is suitable for maintaining the shape.

Also, by using colored yarns as the yarns to be used, it is possible to consider landscapes such as ponds, river beds, and the sea.

The warp knitted fabric A in FIG. 6 is as shown in FIG.
Although the ground structure of the ground knitted fabric 6 shown in Fig. 1 is a ground structure having a relatively small shrinkage, the ground structure can be appropriately changed and changed into each structure such as a half structure and a mesh structure. The tissue has excellent elasticity, while the mesh tissue can provide good ventilation, water flow, and shape change.

FIG. 7 shows that the warp knitted fabric A holds the knitted fabric composed of both chain stitch rows 2 and 4 and the binding yarn 3'to the ground knitted fabric 6 in a napped state, while in FIG. This is the case where a pleated napped state is imparted as shown.

In this case, the binding yarns 3'are alternately arranged in the loops facing each other in the chain stitch rows of the front needle row and the rear needle row which do not face each other, and the engaging positions are shifted in the opposite direction in the stitch row direction. The knitted fabrics A ′ shown in FIG. 4 having a zigzag shape are laterally swayed and connected to form a pleated shape, that is, a corrugated plate shape or a bellows shape. In this case also, it is possible to replace with a modified structure such as a half structure or a mesh structure.

Reference numeral 5'in the figure denotes an insert thread which is inserted into the chain stitch row 4 on the rear side similarly to the above and has a role of reinforcement,
6 that are the same as those in FIG. 6 indicate the same parts.

FIG. 8 shows that each of the above-mentioned structures has the ground knitted fabric 6, but the warp knitted fabric A ″ shown in FIG. In this case, the warp knitted fabric A ″ is generally knitted by a double Russell machine, and knitting is performed by the front needle row F or the rear needle row B to knit the front and rear chain stitch rows 2 and 4, respectively. The knitted fabric is knitted by connecting the chain stitch rows 2 and 4 in zigzag positions which are not directly opposed to each other in the front and rear chain stitch rows 2 and 4 by the binding yarn 3 ′, and in the front needle row F and the rear needle row B. By inserting the insertion yarns 1'and 5'and reinforcing the binding yarn 3 ', the pleated warp knitted fabric A "shown in FIG.

Next, each warp knitted fabric A, A ',
The hollow body enclosed by A ″ is most practically a hollow sphere 11 such as a rubber sphere or a plastic sphere, and is usually used, but not limited to a spherical shape, a hollow body having an arbitrary shape can be used.

The frame 14 having a large number of voids on the outer surface
The spherical frame formed by plastic molding is suitable for practical use.

Of course, in this case as well, various frame bodies are used without being limited to the spherical shape.

In any of the above hollow bodies, the warp knitted fabric is formed into a tubular shape or a bag shape, and in the case of a tubular shape, the warp knitted fabric is wrapped inside, and the upper and lower openings are squeezed and tied. In the case of a bag, a hollow body is housed inside, and the opening is closed to form the contact filter medium of the present invention in which the hollow body is wrapped inside.

The tubular or bag-shaped warp knitted fabric may be capable of accommodating one hollow body, or may be of a size capable of accommodating two or more hollow bodies. Particularly in the latter case, as shown in FIG. 2, in order to stably hold one of the hollow bodies 14, the hollow body is squeezed at an intermediate point between the hollow bodies and tied together to form an enlarged portion 15 covering the hollow body 14, The narrowed portions 16 tightly connected are alternately formed.

The contact filter medium composed of the warp knitted fabric of the hollow body encapsulation obtained as described above is tied to the fixed weight 12 with the cord body 13 and fixedly arranged at an appropriate position to be in a floating state, as shown in FIG. Alternatively, as shown in FIG. 2, it can be attached to a suspended material 17 of an appropriate form as a series of two or more, and can be held in a freely rotatable state while being suspended, and can be used for purification.

The mode of use is appropriately carried out according to the place of use and the situation of use.

Thus, a large amount of microbial colonies are fixed with the three-dimensional shape formed by the knitted fabric and the hollow body including the binding yarns 3 and 9, and a water purifying action is achieved in an environment suitable for the coexistence conditions of microorganisms.

[0042]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, a hollow body is wrapped in a warp knitted fabric that is held in a napped state with respect to a sheet-shaped knitted fabric or has no sheet-shaped knitted fabric and is bent in a pleated shape. It has a shaped filter medium structure, and the contact filter medium can be used in a floating state by the inclusion of a hollow body, fixedly arranged, or used in a freely rotatable state in rivers, ponds, etc. to purify water. it can. In particular, when it is rotatable, the contact surface constantly changes, and the cleaning action is further improved. Moreover, by holding the hollow body in the warp knitted fabric, the surface area of the filter medium can be effectively used and increased, and at the same time, it is suitable for adhering and propagating microbial groups and enhancing the decomposition action of organic substances. It has the effect of improving the water purification effect.

Since the outer cover of the present invention is a warp knitted fabric and the installation shape can be freely selected, the outer cover can be installed in any place, and at the same time, it can be swung in water or the like to prevent sewage. There is also an advantage to increase the contact rate of.

By using a bulky synthetic fiber yarn as the binding yarn, the surface area of the filter medium can be increased and the contact rate can be further increased, and the shape can be stabilized by using the monofilament yarns in parallel. Further, by appropriately selecting the ground structure of the ground knitted fabric, it is possible to easily cope with the case where elasticity, water permeability, air permeability, etc. are required.

Further, by using a sphere or a spherical frame as the hollow body, the hollow body can be used depending on the place of use and the purpose of use.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of a filter medium of the present invention.

FIG. 2 is a schematic perspective view showing another embodiment of the filter medium of the present invention.

FIG. 3 is a schematic perspective view showing an example of a warp knitted fabric used for the filter material of the present invention.

FIG. 4 is a schematic perspective view showing another embodiment of the warp knitted fabric used for the filter material of the present invention.

FIG. 5 is a schematic perspective view showing still another embodiment of the warp knitted fabric used for the filter material of the present invention.

6 is an organization chart showing an example of the warp knitted fabric according to FIG. 3. FIG.

FIG. 7 is an organization chart showing an example of the warp knitted fabric according to FIG. 4.

8 is an organization chart showing an example of the warp knitted fabric according to FIG.

[Explanation of symbols]

 1,1 'front side insertion yarn 2 front side chain stitch row 3,3' binding yarn 4 rear side chain stitch row 5, 5'rear side insertion yarn 6 sheet knitted fabric 11 hollow body 14 hollow frame body

Claims (10)

[Claims] 1. A hollow body is formed by enclosing a hollow body with a warp knitted fabric in which front and rear chain stitches bound by a binding yarn are held in a napped state with respect to a sheet-like knitted fabric. Characteristic contact filter media. 2. A contact characterized in that a hollow body is formed by enclosing a hollow body with a warp knitted fabric in which the front and rear chain stitch rows bound together by a binding yarn are bent and formed in a pleated shape as a whole. Filter media. 3. The binding yarn is a bulky synthetic fiber yarn.
Alternatively, the contact filter medium according to item 2. 4. The contact filter medium according to claim 1, wherein the binding yarn is a combination of bulky synthetic fiber yarn and synthetic fiber monofilament yarn. 5. The contact filter medium according to claim 1, wherein the warp knitted fabric is formed into a tubular shape or a bag shape, and one or more hollow bodies are wrapped in the tubular warp knitted fabric. 6. A tubular or bag-shaped warp knitted fabric, in which two or more hollow bodies are wrapped, and a plurality of hollow portions covered with hollow bodies and narrowed portions narrowed therebetween are alternately formed. Item 5
The contact filter medium described. 7. The contact filter medium according to claim 1, wherein the hollow body is a rubber ball. 8. The contact filter medium according to claim 1, wherein the hollow body is a sphere made of plastic. 9. The hollow body is a hollow spherical frame body.
The contact filter medium according to any one of items 1 to 6. 10. The contact filter medium according to claim 9, wherein the spherical frame is made of plastic.