Screen material mounting structure

Abstract

To provide screen material and an attachment structure of the screen material allowing attachment on an object to be easily performed, which is hard to be displaced and to be deteriorated.SOLUTION: Screen material 1 comprises base material 2a formed by weaving resin fiber material in a mesh, and is provided with a body part 2 formed in a cylindrical shape to be covered on an object. One end part in a longitudinal direction of the body part 2 formed in the cylindrical shape is opened, and the other end part in the longitudinal direction is opened or sealed. The resin fiber material is made of Nylon.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention is the screen This relates to the mounting structure of the material. [Background technology]

[0002] A known ground improvement method involves lowering the groundwater level, known as the super well point method (see, for example, Patent Document 1). In this method, the strainer has a double-pipe structure consisting of an inner cylindrical pipe and a wire strainer. Groundwater flowing in through the wire strainer is separated into air and water between the double pipes, and then flows into the well through a water passage hole at the bottom. Continuous vacuum drainage is then achieved by applying negative pressure to the inside of the double pipe with a vacuum pump.

[0003] However, harmful substances such as hydrogen sulfide and VOCs (volatile organic compounds) exist underground, which can cause rust to form on metal wire-wound strainers, accelerating their deterioration. To prevent this, recent attempts have been made to protect the strainer by wrapping it in a screen material such as wire mesh or insect netting. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3280935 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the above problems, the invention described in claim 1 is as follows: A screen material mounting structure in which a screen material is configured by a base material formed by weaving a resin fiber material into a mesh shape, and has a main body portion formed in a cylindrical shape and mounted on an object, and the screen material is mounted on the object, The object is a pipe buried underground and used in the super well point construction method, The pipe body is formed by joining a plurality of pipes in the length direction, and at least the pipe located at the lowest end and the pipe located immediately above it have an inner cylindrical pipe and a wire strainer attached via a spacer to the outer circumferential surface of the inner cylindrical pipe, and the inner cylindrical pipe located at the lowest end has a plurality of water passage holes formed at the lower end, and these plurality of water passage holes are covered with the wire strainer to form a double pipe structure, and the part having the double pipe structure forms a water intake part that takes in underground moisture inside, and groundwater that has been taken in by the water intake part and flowed into the pipe body through the water passage holes is passed through the double pipe. structure By applying negative pressure to the inside of the The screen material is provided inside the main body portion. The whole of is placed over the pipe body so that the And, The screen material is flexible. It is characterized by:

[0006] The object of the present invention is to provide a device that can be easily attached to an object and is resistant to slippage. Screen material mounting structure that is resistant to deterioration The purpose is to provide the following. [Means for solving the problem]

[0007] In order to solve the above problems, the invention described in claim 1 is a screen material, The device is characterized by being composed of a base material formed by weaving a resin fiber material into a mesh shape, and having a main body portion formed in a cylindrical shape to be placed over the object.

[0008] The invention described in claim 2 is the invention described in claim 1 invention In The main body is formed in a cylindrical shape and has one end in the longitudinal direction that is open, and the other end in the longitudinal direction that is open or closed.

[0009] The invention described in claim 3 is the same as the invention described in claim 1 or 2. invention In The resin fiber material is made of nylon. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a screen material and a screen material mounting structure that can be easily mounted on an object, is resistant to slippage, and is resistant to deterioration. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2(a) is a perspective view showing the main body of the screen material, and FIG. 2(b) is a perspective view showing the base material of the screen material. [Figure 2] FIG. 10 is a diagram showing how a screen material is attached to a tube body of an SWP. [Figure 3] 10A and 10B are diagrams showing another example of a manner in which a screen material is attached to a tube body of an SWP. [Figure 4] FIG. 10 is a diagram showing how a screen material is attached to an underdrain drainage pipe. [Figure 5] FIG. 10 shows an embodiment of a container screen material used in the production of liquids that require a filtration process. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the embodiments described below are subject to various technically preferable limitations for carrying out the present invention, the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

[0014] In Fig. 1(a), reference numeral 1 denotes a screen material. This screen material 1 is attached by covering an object. Such a screen material 1 has a main body 2 formed in a cylindrical shape, and the object is placed inside this main body 2.

[0015] As shown in FIG. 1(b), the main body 2 is made up of a single substrate 2a. The base material 2a is formed by weaving a resin fiber material into a mesh shape. Therefore, the base material 2a has stretchability in both the longitudinal and lateral directions. Accordingly, the main body 2 formed by the base material 2a also has stretchability in the longitudinal and circumferential directions.

[0016] In this embodiment, the resin fiber material is made of nylon (nylon fiber), but may also be made of polyester (polyester fiber), for example. Because the resin fiber material is made of nylon, the base material 2a formed from such a resin fiber material is resistant to abrasion and friction and has excellent durability. It is also lightweight, flexible, and resistant to repeated bending. It also dries quickly and is said to be free from mold and insect damage. Furthermore, it is resistant to harmful substances such as hydrogen sulfide and VOCs (volatile organic compounds).

[0017] The base material 2a is woven in a mesh shape, and therefore has water permeability, while allowing solid particles that cannot pass through the mesh to adhere and be removed. In this embodiment, the mesh size (opening) of the mesh is set to 1 mm or less.

[0018] The cylindrical main body 2 has at least one end in the longitudinal direction that is open, and the other end in the longitudinal direction may be open as shown in Fig. 2 or closed as shown in Fig. 3. When closing the other end in the length direction, the end of the base material 2a may be narrowed and sewn together, or a circular closing base material 2b (see FIG. 3) may be provided integrally. In the following, for ease of explanation, the screen material 1 in a state where the other longitudinal end of the main body portion 2 is open will be referred to as the first screen material 1A, and the screen material 1 in a state where the other longitudinal end of the main body portion 2 is closed will be referred to as the second screen material 1B.

[0019] The screen materials 1A and 1B configured as described above are attached to an object by covering it. Therefore, the object has a size or shape that can fit inside the cylindrically formed main body 2, or a size or shape that can be covered by the main body 2. The object shown in Figs. 2 and 3 is a pipe 10 called a SWP (super well point) used in the super well point construction method.

[0020] The pipe body 10 is formed by joining a plurality of pipes 10a, 10b in the longitudinal direction by welding or the like, and the lower end is buried in the ground and the upper end is exposed above ground. Of the multiple pipes 10a, 10b that make up the pipe body 10, at least the pipe 10a located at the lowest end and the pipe 10b located immediately above it each have an inner tube 11 and a wire-wound strainer 12 provided on the outer surface of the inner tube 11 via spacer steel bars.

[0021] The inner tube 11 of the tube 10a located at the lowest end has a plurality of water holes (not shown) formed at the lower end, and these plurality of water holes are covered by a wire strainer 12. The inner tubes 11 of the multiple tubes 10a, 10b are welded together. To ensure a welding space between the inner tubes 11, the wire strainer 12 is not extended to the end of the inner tube 11 on the welding side. In other words, when the inner tubes 11 of the multiple tubes 10a, 10b are joined together vertically, gaps are formed between the wire strainers 12 of the multiple tubes 10a, 10b. For this reason, connecting hardware 13 is provided between the multiple tubes 10a, 10b, straddling the wire strainers 12 and closing the gaps.

[0022] The connecting hardware 13 is a split material that can be attached to cover the outside after joining the inner tube pipes 11. The pair of split materials that make up the connecting hardware 13 have integrally formed flat plate portions that protrude like ears, and these flat plate portions are joined together with bolts and nuts to form the cylindrical connecting hardware 13.

[0023] The pipe body 10 configured as described above has a double-pipe structure in the area including the inner tube 11 of the multiple pipes 10a, 10b, the water passage hole in the lower end pipe 10a, the wire-wound strainer 12 of the multiple pipes 10a, 10b, and the connecting hardware 13, and this area forms the strainer section 10S (i.e., the water intake section) of the pipe body 10. In this strainer section 10S, groundwater flows in through the gaps in the wire strainer 12. The inflowing groundwater is separated into air and water between the double pipes and flows into the pipe body 10 through the water passage hole at the bottom. Continuous vacuum drainage is then possible by applying negative pressure to the inside of the double pipes with a vacuum pump.

[0024] The screen material 1 (1A, 1B) in this embodiment is attached by covering the strainer portion 10S of the pipe body 10.

[0025] In the example shown in FIG. 2, a first screen material 1A with both longitudinal ends open is placed over each of the plurality of pipes 10a, 10b. Each first screen material 1A may be overlapped on top of the connecting hardware 13 as shown in Figure 2(b), or the connecting hardware 13 may be attached on top of each overlapping first screen material 1A as shown in Figure 2(c).

[0026] In the example shown in Figure 3, the second screen material 1B, with its other longitudinal end closed, is placed over the pipe 10a at the lower end, and the first screen material 1A, with both longitudinal ends open, is placed over the pipe 10b located directly above it. The screen materials 1A and 1B may be overlapped on top of the connecting hardware 13 as shown in Figure 3(b), or the connecting hardware 13 may be attached on top of the overlapping screen materials 1A and 1B as shown in Figure 3(c).

[0027] After the first screen material 1A and the second screen material 1B are placed over the pipes 10a and 10b, they are fastened by bands 3 and 4 to be fixed in position. To reliably prevent displacement of the pipe body 10 when it is buried underground, stainless steel bands 3, which can be tightly fastened, are used on both longitudinal end sides of each screen material 1A, 1B. Easy-to-handle PP bands 4, for example, are used on the longitudinal center side of each screen material 1A, 1B.

[0028] Each screen material 1A, 1B is placed over the strainer portion 10S of the tubular body 10 as if putting on socks, stockings, tights, etc. That is, the screen material 1A, 1B is placed over the tubular body 10a, 10b so that the ends of the tubular body 10a, 10b fit into the open portion of the screen material 1A, 1B, and then the ends of the screen material 1A, 1B are gradually pulled to extend the coverage. Although a step is formed between the inner tube 11 and the wire-wound strainer 12, increasing the diameter, each screen material 1A, 1B is stretchable, making it possible to easily and reliably cover the wire-wound strainer 12 as well. Furthermore, because each screen material 1A, 1B is stretchable, it fits snugly over the strainer portion 10S of the tubular body 10. In this manner, the screen materials 1A and 1B can be attached to the strainer portion 10S of the pipe body 10 by covering them.

[0029] Although the pipe body 10 in this embodiment is a pipe body 10 called SWP used in the super well point construction method, the target object may be a pipe body used in other ground improvement construction methods, for example.

[0030] FIG. 4 shows an example in which the object is an underdrain drainage pipe 20. The culvert drain pipe 20 is buried underground and takes in water (rainwater or groundwater) to improve drainage of the ground. Such a culvert drainage pipe 20 is configured so that a cylindrical pipe wall 21 is formed in a mesh shape so that water can permeate inside. That is, the pipe wall 21 functions as a water intake portion. In addition, a reinforcing strip 22 for reinforcing the pipe wall 21 is spirally wound around the pipe wall 21 and integrated therewith.

[0031] Since the culvert drainage pipes 20 are often laid over a wide area of ​​land, most of the laid culvert drainage pipes 20 are covered and attached with a first screen material 1A with both ends in the longitudinal direction open. On the other hand, if the end of the culvert drainage pipe 20 is exposed to the ground (for example, a river bank), the end may be covered and attached with a second screen material 1B with the other end in the length direction closed.

[0032] 5 shows an example in which the target object is a container 30 for storing a liquid 30a that generates sediment. More specifically, this refers to, for example, a barrel for sake brewing or a barrel for producing seasonings such as soy sauce. In other words, the target object is a container 30 used to produce a liquid 30a that ultimately requires a filtration process. The container 30 has at least an open top end that can be closed with a lid (not shown). A drain port (hole) for draining the liquid to the outside may be formed in the side wall or bottom of the container.

[0033] Since the screen material 1 is used to filter the liquid 30a, a second screen material 1B is used, with the other longitudinal end (lower end) closed. The second screen material 1B has one longitudinal end (upper end) open, and is attached to the container 30 by covering it from the inside to the outside. The open portion of one longitudinal end is hung over the edge 31 at the upper end of the container 30. The liquid 30a is produced in the container 30 in this state. Then, when the filtration process is reached, the one longitudinal end of the second screen material 1B is raised, allowing the sediment to be easily filtered out.

[0034] According to this embodiment, the following excellent effects are achieved. That is, the screen material 1 (1A, 1B) is composed of a base material 2a formed by weaving a resin fiber material into a mesh pattern, and is equipped with a main body portion 2 formed in a cylindrical shape to be placed over the object 10, 20, 30. Therefore, the main body portion 2 is stretchable, can be easily attached to the object 10, 20, 30, and is less likely to slip off. In other words, unlike conventional methods, the process of manually wrapping a sheet of screen material around a strainer portion and tightening it with a band is not required, and the stretchable, cylindrical main body portion 2 can be easily attached to the object 10, 20, 30 just like putting on socks, stockings, tights, etc. Therefore, even if the screen material 1 (1A, 1B) is manually placed over the object 10, 20, 30, it can be attached accurately.

[0035] Furthermore, one longitudinal end of the cylindrically formed main body 2 is open, and the other longitudinal end is open or closed, so that the screen material 1 (1A, 1B) can be easily attached to the object 10, 20, 30 just as if putting on socks, stockings, tights, etc. Furthermore, when both ends of the main body 2 in the length direction are in an open state, it can be attached to the center of the object 10, 20 in the length direction. When one longitudinal end of the main body 2 is open and the other longitudinal end is closed, it can be attached to the end of the object 10, 20. In addition, when the object 10, 20 is to be buried underground, it is unlikely to slip even when buried downward. Furthermore, when the object is a container 30, it can be suitably used for producing a liquid that requires a filtration process.

[0036] Furthermore, the resin fiber material forming the base material 2a is made of nylon, and therefore is resistant to harmful substances such as hydrogen sulfide and VOCs in the ground, and is resistant to deterioration even when buried underground.

[0037] Furthermore, the target object 10,20 is a pipe body 10,20 buried in the ground, and the pipe body 10,20 is equipped with a water intake section (strainer section 10S, pipe wall 21) that takes in moisture from the ground inside, and the screen material 1 (1A, 1B) is attached to cover the pipe body 10,20 so that the water intake section 10S,21 is positioned inside the main body section 2, so that the screen material 1 (1A, 1B) can prevent fine sand from the ground from being taken into the inside of the pipe body 10,20 from the water intake section 10S,21. [Explanation of symbols]

[0038] 1 Screen material 1A First screen material 1B Second screen material 2 Main body 2a Base material 2b Occlusion base material 3 Stainless steel band 4 PP bands 10. Body 10a pipe 10b tube 10S strainer part 11 Inner tube 12-wound strainer 13 Connecting hardware 20 Underground drainage pipe 21 Pipe wall 22 Reinforcing strip 30 containers 31 Edge

Claims

1. A screen material mounting structure in which a screen material is configured by a base material formed by weaving a resin fiber material into a mesh shape, and has a main body portion formed in a cylindrical shape and mounted on an object, and the screen material is mounted on the object, The object is a pipe buried underground and used in the super well point construction method, The pipe body is formed by joining a plurality of pipes in the longitudinal direction, and at least the pipe located at the lowest end and the pipe located immediately above have an inner cylindrical pipe and a wire strainer attached via a spacer to the outer surface of the inner cylindrical pipe, and the inner cylindrical pipe located at the lowest end has a plurality of water passage holes formed at its lower end, and these plurality of water passage holes are covered by the wire strainer to form a double pipe structure, and the part having the double pipe structure forms a water intake section that takes in moisture from underground, and groundwater taken in by the water intake section and flowing into the pipe body through the water passage holes can be continuously vacuum-drained by applying negative pressure inside the double pipe structure, The screen material is attached to cover the pipe body so that the entire water intake section is disposed inside the main body section, A screen material mounting structure characterized in that the screen material is flexible.

2. 2. The screen material mounting structure according to claim 1, wherein one end in the length direction of the cylindrically formed main body is open, and the other end in the length direction is either open or closed.

3. 3. The screen material mounting structure according to claim 1, wherein the resin fiber material is made of nylon.

Images