JP2923610B2 - Contact filter media - Google Patents

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 a contact filter medium containing a hollow body and capable of floating in water or the like.

[0002]

2. Description of the Related Art Conventionally, for purifying rivers, purifying domestic wastewater, or purifying with an air purifier, a filter material, for example, a nonwoven fabric or a crushed stone aggregate, or a fiber made of wire or the like as a core material has been used. The so-called scourer-shaped ones with tissues arranged radially are known,
While widely used, plastic contact materials, nonwoven fabric contact materials, synthetic fiber cloth-like contact materials, string-like contact materials, and the like are used as contact filter media for decomposing organic substances by microorganisms to purify water.

[0003]

However, since the filter material is generally used in a form of a flat shape and suspended from an upper part in a filtration tank, it is generally necessary to increase the water content by a typhoon or the like. There is inconvenience in maintenance, such as an increase in resetting costs due to entanglement or damage with the filter material of the filter material, and in order to increase the filtration area by arranging the fibers radially, the usage form is to be an elongated rod shape. There were restrictions on the form of use.

[0004] More specifically, by arranging the fibers radially, from the tip to the middle, microorganisms, particularly eutrophic substances such as aerobic bacteria, are purified by degradation treatment, and anaerobic bacteria in the center. In order to form a cycle to decompose dead bodies such as surface microbial communities, activated sludge accumulates from the central part due to continuous use, and eventually a significant decrease in purification capacity due to covering the entire fiber structure Occurred and eventually resulted in maintenance problems, such as manual cleaning.

[0005] On the other hand, those using ordinary filter media are limited in their installation locations, and do not consider the action of decomposing organic substances due to propagation of microorganisms, etc., and simply purify water as a filler or the like. It's just

[0006] The present invention addresses the above situation,
Paying particular attention to the use of warp knitted fabric and the inclusion of hollow bodies, it is suitable for decomposing the above organic matter inside the knitted fabric, and by arranging yarn that contributes to form stability, reduction of maintenance after laying and increase of filtration area It is an object of the present invention to provide a contact filter medium which can be arbitrarily selected, a use form can be arbitrarily selected by setting a tissue, and can be floated in water or the like by three-dimensionalization, and can be fixed or rotatable freely. .

[0007]

That is, one of the features of the contact filter medium of the present invention that meets the above-mentioned object is that one of the first and second chain stitch rows before and after being connected by a binding thread is a sheet-like knitted fabric. A contact filter medium formed by wrapping and forming a hollow body with a warp knitted fabric held in a napped state as a jacket.

The present invention is also characterized in that the hollow body is formed by wrapping a warp knitted fabric in which the front and rear chain stitch rows joined together by a binding thread are bent and formed in a pleated shape as a whole.

According to the third and fourth aspects of the present invention, the type of the binding yarn in each of the above structures is specified. The former uses a bulky synthetic fiber yarn as the binding yarn, and the latter uses the bulky synthetic yarn. Synthetic fiber monofilament yarn is further used in combination with the fiber yarn.

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

[0011] Each invention described in claim 7 or later is
As a specific embodiment of the hollow body in the contact filter medium, a spherical frame such as a rubber ball, a plastic ball or a hollow plastic spherical frame is used, and the hollow frame is included therein.

[0012]

The contact filter medium of the present invention has a floating property by enclosing 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, and rotated with the rotation of the floating substance. Rotate freely to purify water under water.

When the warp-knitted fabric is brought into contact with sewage such as a river or a pond as a filter medium in the above-described state, the microorganisms adhere and propagate at the joints and the knitted fabric portion, and the microorganisms are contaminated in the sewage. Decompose organic matter and purify water. The binding yarn portion and the ground knitted fabric portion increase the contact area, enhance adhesion of microorganisms, and improve purification performance.

When a bulky synthetic fiber yarn is used as the binding yarn, the fiber void increases, the contact area is increased, and when a synthetic fiber monofilament yarn is used in combination, the form stability is enhanced.

Further, the number of the hollow bodies is not limited to one, and two or more hollow bodies are included as open spheres, so that the contact area is further increased and the purification performance is enhanced.

[0016] Incidentally, the one using a hollow ball as a hollow body is suitable for mounting on a fixed weight, while the one using a spherical frame is mounted on a floating object so that it can rotate freely and form a contact surface. It is suitable for purifying by constantly changing.

[0017]

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

FIGS. 1 and 2 show embodiments 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 attached to a fixed weight 12 via a cord 13. It is connected and can be fixedly used underwater.

On the other hand, in FIG. 2, the contact filter medium of the present invention, in which a hollow spherical frame 14 is included as a hollow body in the warp knitted fabric A, is connected with two spherical frames 14 in the warp knitted fabric A. Part 1
5 and a constriction 16 are formed, and are integrally attached to the lower part of the floating substance 17.

This allows the contact filter medium to freely rotate with the floating of the floating matter 17 in a river or the like and the free rotation, thereby making it possible to constantly change the contact surface.

In the above construction, the warp knitted fabric A enclosing the hollow body 11 is warp knitted fabric A 'which maintains the nap state or the pleated nap state with respect to the sheet knitted fabric 6 as shown in FIGS. (See FIGS. 3 and 4) or warp knitted fabric A ″ which is bent in a pleated shape as a whole without having a sheet knitted fabric.
(See FIG. 5).

FIGS. 6 to 8 show one example of a specific knitting structure of each warp knitted fabric. Hereinafter, these knitting structures will be described step by step.

FIG. 6 is a structural diagram of the warp knitted fabric A holding the napped state shown in FIG. 3. In the figure, reference numerals 2 and 4 denote chain stitch rows which are formed in front and rear two rows in the wale direction and extend.
Reference numeral 3 denotes a binding thread that alternately engages with the opposing loops of the front and rear opposing chain stitch rows and swings in a zigzag manner, and connects the chain stitch rows. 2
With the insertion yarn inserted into the chain stitch structure as shown in FIG. The sheet-like ground knitted portions 6 are formed.

Reference numeral 5 denotes a state in which the binding yarns 3 are bundled by shaking the rear chain stitch row 4 in the transverse direction, preferably about 2 to 4 courses, to maintain the napped state with respect to the ground knitting portion 6. The warp knitted fabric as a whole is formed into a warp knitted fabric A as shown in FIG. 3 in which one side is in a sheet shape and the other side is in a napped state, with the aid of the insertion yarn 5 for assisting the maintenance of the napped state.

The warp-knitted fabric A having the above structure is knitted by a double Russell machine, and the front needle row F or the rear needle row B is chain-knitted to form front and rear chain stitch rows 2 and 4. At the same time, the front and rear chain stitch rows 2 and 4 are connected to each other with a binding yarn 3 to knit a knitted fabric in a raised state with respect to the ground structure, and the insertion yarn 1 is inserted into the chain stitch row 2 in the front needle row. The structure of one sheet-like ground knitted fabric 6 is knitted in a zigzag manner by laterally oscillating from about 2 to 10 courses, while the rear needle row is laterally skewed from about 2 to 4 courses using the insertion yarn 5. The warp knitted fabric A of the present invention is obtained by bundling the binding yarn 3 by shaking in the direction to maintain the napped state with respect to the ground knitted fabric 6.

The yarn used in the knitting of the warp knitted fabric may be selected from synthetic fiber yarns such as nylon, polyester, and polypropylene, polyurethane-based elastic fiber yarns, and natural fiber yarns such as cotton. Any thread can be used as long as it can be set on the machine,
Although it is arbitrarily selected, a synthetic knitting fabric or a synthetic fiber multifilament yarn is used for a chain knitting yarn for binding a binding yarn, and a thermoplastic synthetic fiber multifilament yarn is used for a binding yarn. It is preferable to use the yarn or a synthetic fiber monofilament yarn aligned with it.

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

By using colored yarns for the yarns to be used, it is possible to consider landscapes such as ponds, riverbeds, and the sea.

The warp knitted fabric A in FIG.
Although the ground structure of the ground knitted fabric 6 shown in FIG. 5 is relatively small in shrinkage, the ground structure can be appropriately changed and changed to each structure such as a half structure and a mesh structure. The tissue is excellent in elasticity, while the mesh tissue can improve 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 ′ in a raised state with respect to the ground knitted fabric 6. This is a case where a pleated napped state is given as shown.

In this case, the engagement position is shifted in the stitch row direction alternately and in the opposite direction in the chain stitch row of the front needle row and the rear needle row where the binding yarn 3 'is not directly opposed. They are joined in a zigzag shape by shaking them sideways, thereby forming a knitted fabric A 'as shown in FIG. 4 having a pleated shape, that is, a corrugated plate shape or a bellows shape. In this case, it is also possible to substitute a changed structure such as a half structure and a mesh structure.

The reference numeral 5 'in the figure denotes an insertion thread which is inserted into the rear chain stitch row 4 as described above and has a role of reinforcement.
6 denote the same parts.

FIG. 8 shows the warp knitted fabric A ″ shown in FIG. 5 which is formed in a pleated shape without having such a ground knitted fabric 6 while each of the above-described structures has a ground knitted fabric 6. In this case, the warp knitted fabric A ″ is generally knitted by a double Russell machine, and is knitted with 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 at zigzag positions not facing each other with the front and rear chain stitch rows 2 and 4 with 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 ′, a warp knitted fabric A ″ having a pleated shape shown in FIG. 3 is obtained using the chain stitch row as a fold as a whole.

Next, the warp knitted fabrics A, A ',
As the hollow body wrapped by A ″, a hollow sphere 11 such as a rubber sphere or a plastic sphere is most practical and usually used. However, the hollow body is not limited to a spherical shape, and a hollow body of any shape can be used.

The frame 14 having a large number of voids on its outer surface
It is also possible to use a spherical frame formed by plastic molding.

Of course, also in this case, not only the spherical shape but also various frames are used.

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

The tubular or bag-like warp knitted fabric may be capable of accommodating one hollow body, or may have a size capable of accommodating two or more hollow bodies. In particular, in the latter case, as shown in FIG. 2, in order to stably hold one of the hollow bodies 14, it is squeezed and connected in the middle between the hollow bodies to form an enlarged part 15 covering the hollow body 14. The constricted portions 16 which are connected by drawing are alternately formed.

As shown in FIG. 1, the contact filter medium made of a warp-knitted fabric with a hollow body obtained as described above is tied to a fixed weight 12 with a string 13 and fixed and disposed at an appropriate position to be in a floating state. Also, as shown in FIG. 2, two or more continuous pieces can be attached to a floating object 17 of an appropriate form and floated, and can be held in a freely rotatable state to provide a purifying action.

It should be noted that the mode of use is appropriately performed according to the place of use and the state of use.

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

[0042]

According to the present invention, as described above, the hollow body is wrapped in a warp knitted fabric which is held in a raised state with respect to the sheet-like knitted fabric, or has no sheet-like knitted fabric and is bent and formed in a pleated shape. It is a filter media structure with a shape.The contact filter media can be used in a floating state by enclosing a hollow body, fixedly arranged, or used as a free-rotating state for rivers and ponds to purify water. it can. In particular, the contact surface constantly changes when it is freely rotatable, thereby further purifying the purifying action. In addition, by holding the hollow body with the warp knitted fabric, the surface area as a filter medium can be used effectively, and the increase can be achieved. In addition, it is suitable for attaching and propagating microorganisms, and enhances the decomposing action of organic substances. And has the effect of improving the water purification action.

Since the jacket of the present invention is a warp knitted fabric and its installation shape can be freely selected, it can be installed in any place, and can oscillate at any time in water or the like to reduce waste water. There is also the advantage of increasing the contact rate of

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

Further, the use of a spherical body or a spherical frame as a hollow body has a use corresponding to the place of use and the purpose of use.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one 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 medium of the present invention.

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

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

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

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

FIG. 8 is an organization chart showing one example of the warp knitted fabric according to FIG. 5;

[Explanation of symbols]

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

Claims (10)

(57) [Claims] 1. A method according to claim 1, wherein the front and rear chain stitch rows joined by the binding yarn are formed by wrapping a hollow body with a warp knitted fabric held in a napped state with respect to the sheet-shaped knitted fabric as a jacket. Characteristic contact filter media. 2. A contact structure comprising: a warp knitted fabric formed by folding a knitted string before and after a knitted thread as a whole in a pleated shape; and wrapping and forming a hollow body. Filter media. 3. The binding yarn according to claim 1, wherein the binding yarn is a bulky synthetic fiber yarn.
Or the contact filter medium of 2. 4. The contact filter medium according to claim 1, wherein the binding yarn comprises both 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 in 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 comprising two or more hollow bodies wrapped therein, and a plurality of bulging portions covered by the hollow body and narrowed portions narrowed down therebetween are alternately formed. Item 5
The contact filter medium as 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.
Item 7. The contact filter medium according to any one of Items 6 to 6. 10. The contact filter according to claim 9, wherein the spherical frame is made of plastic.