Installation method of a dust removal device

Abstract

To provide a method for installing a dust removal device that does not involve complicated preparation procedures. [Solution] The present invention provides a method for installing a dust removal device, comprising: installing a frame 10 on the bottom surface BL of a waterway, and then installing a housing 20 to be joined to the frame 10; and a step A of attaching a positioning jig 50 capable of supporting the frame 10 to the frame 10; a step B of supporting the positioning jig 50 attached to the frame 10 at a reference position on the housing 20; and a step C of making the frame 10 supported at the reference position stand upright on the bottom surface BL of the waterway.

Description

Technical Field

[0001] The present invention relates to a method for installing a dust removal device.

Background Art

[0002] Dust and dirt float in water such as rivers or seas from which factories and the like draw water. If dust and dirt enter the facilities of factories and the like, it may cause serious equipment troubles, so the removal of dust and dirt from the water to be drawn is required. For example, in a power plant where clean water is required, the requirement standards for the removal of dust and dirt from the water to be drawn are extremely high.

[0003] Therefore, various devices have been conventionally proposed as means for removing dust and dirt floating in water. The types of dust and dirt are various, for example, wood chips, paper scraps, waste plastics, domestic garbage, or aquatic organisms such as grass, algae, or jellyfish. Generally, after removing large dust and dirt with a coarse bar screen, a dust removal device using a fine screen is used to remove small dust and dirt.

[0004] A dust removal device known as a means for removing dust and dirt floating in water is a type of dust removal device equipped with a rotary screen. A dust removal device of the type equipped with a rotary screen has a structure in which a chain with a screen attached is stretched between a pair of wheels arranged vertically and is circulated. Then, as the chain stretched between the vertically arranged wheels circulates up and down in the water channel, the screen also circulates to collect the dust and dirt in the flowing water. The dust and dirt collected by the screen are usually lifted up to the upper part of the dust removal device in accordance with the circulation of the screen, discharged outside the device there, and separately disposed of.

[0005] Patent Document 1 shows an example of a dust removal device equipped with a rotary screen. The dust removal device disclosed in Patent Document 1 is a type of dust removal device that rotates the screen by a sprocket arranged at the upper part.

[0006] To install the dust removal device, a frame is suspended from a crane and placed on the bottom surface of the waterway, and then a housing equipped with a drive mechanism for circulating the screen is installed. The housing is placed on a housing base at floor level and then joined to the frame with bolts and nuts. Generally, the precision of large-scale concrete work is in the centimeter range, while the installation precision required for the machinery and equipment of the dust removal device is said to be in the millimeter range. Since the precision of the bottom surface of the waterway is in the centimeter range, it is difficult to join the housing by simply suspending the frame and placing it on the bottom surface of the waterway. Therefore, the frame to be joined to the housing must be properly leveled to meet the installation precision requirements so that it can be joined to the housing with bolts and nuts.

[0007] Therefore, when installing the frame, leveling is performed by adjusting the jack bolts provided on the frame. However, it is difficult to adjust the jack bolts while the long frame is in the waterway, so the frame is lifted again with a crane after it has been placed in place, and then the jack bolts are adjusted. Once the jack bolt adjustment is complete, the frame is placed in the waterway to check whether the leveling has been properly performed. The leveling work also includes adjusting the tilt of the frame in the vertical direction. This series of operations is repeated until the frame installation accuracy is met. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Utility Model Publication No. Showa 51-136635 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The installation of the frame is complicated because it involves repeatedly lifting and lowering the frame for leveling, and the inclination of the long frame relative to the vertical must be taken into consideration.

[0010] Therefore, the present invention aims to provide a method for installing a dust removal device that allows the dust removal device to be installed without involving complicated work. [Means for solving the problem]

[0011] The installation method of the dust removal device of the present invention is as follows: A method for installing a dust removal device for collecting debris in a waterway, comprising installing a frame on the bottom surface of the waterway and then installing a housing that is joined to the frame, Step A involves attaching a positioning jig capable of supporting the frame to the frame, Step B involves supporting the positioning jig attached to the frame at a reference position on the housing, The system includes a step C that allows a frame supported at a reference position to stand independently on the bottom surface of the waterway.

[0012] The installation method of the dust removal device of the present invention is as follows: Step D involves removing the positioning jig from the frame, The system includes step E, which involves installing the housing and joining it to the frame.

[0013] In step C, a height adjustment member provided on the frame, which allows the frame's height to be adjusted, contacts the bottom surface of the waterway, making the frame self-supporting.

[0014] The positioning jig is supported in a reference position by a housing base.

[0015] The positioning jig is supported in a reference position by the housing base. The housing is placed on the housing base. [Effects of the Invention]

[0016] According to the installation method of the dust removal device of the present invention, the dust removal device can be installed without complicated operations.

Brief Description of Drawings

[0017] [Figure 1] It is a front view showing the installation state of the dust removal device according to an embodiment of the present invention. (a) is a front view of the dust removal device, and (b) is an enlarged front view of the joint portion between the frame and the housing. [Figure 2] It is a right side view showing the installation state of the dust removal device according to an embodiment of the present invention. [Figure 3] It is a view showing the hanging state of the frame according to an embodiment of the present invention. (a) is a front view of the frame being hung into the water channel, and (b) is a right side view of the frame being hung into the water channel. [Figure 4] It is a view showing the state where the frame is placed on the housing base together with the positioning jig according to an embodiment of the present invention. (a) is a front view of the frame and the positioning jig, (b) is a right side view of the frame and the positioning jig, (c) is an enlarged front view of the joint portion between the positioning jig and the frame, and (d) is an enlarged right side view of the positioning jig placed on the housing base. [Figure 5] It is an enlarged front view of the joint portion of the frame according to the present embodiment of the present invention. (a) is the joint portion with the positioning jig that can support the frame, and (b) is the joint portion with the housing after removing the positioning jig. [Figure 6] It is a flowchart diagram of the installation procedure of the dust removal device of the present invention.

Modes for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the dust removal device 1 according to this embodiment, the frame 10 is first installed on the bottom surface BL of the water channel, the housing 20 is installed after the installation of the frame 10 is completed, and the housing 20 is joined to the frame 10. When installing the frame 10, with the positioning jig 50 that can support the frame 10 at a position corresponding to the height when the housing 20 and the frame 10 are joined, attached to the frame 10, the installation work of the frame 10 is carried out, so that the dust removal device 1 can be installed without complicated adjustment work. When installing the dust removal device 1, water is drained from the water channel. The direction in which water flows in the water channel is defined as the water flow direction F. Also, the water flow direction F is orthogonal to the vertical direction V. The water flow direction F and the vertical direction V are appropriately used in the description of each figure.

[0019] [Dust removal device 1: refer to Fig. 1 and Fig. 2] The dust removal device 1 is a device that removes dust floating in the water taken in. As shown in Fig. 1, the dust removal device 1 includes a frame 10 installed in the water channel and immersed in the water, a housing 20 in which a driving device for circularly moving a screen (not shown) is installed, and a housing base 30 that supports and joins the housing 20.

[0020] In the posture of the frame 10 standing upright in the water channel, at the four corners on the lower side of the frame 10 in the vertical direction V, jack bolts 40 as height adjustment members for adjusting the height of the frame 10 are attached. Note that the length of the lower part of the frame 10 in the vertical direction V in the water flow direction F is longer than the body part of the frame 10 because a lower sprocket wheel around which a chain for supporting the screen is wound is provided. The jack bolts 40 provided at the four corners can be individually adjusted to adjust not only the height of the frame 10 but also the inclination with respect to the vertical direction V. Also, it can cope with the difference in the height of the bottom surface BL of the water channel with an accuracy of centimeters.

[0021] The housing 20 is provided with holes 21A and 21B, which are joined to the frame 10 by bolts 61 and nuts 62. The housing 20 is also provided with a number of joining holes (not shown) which are joined to the housing base 30 by bolts and nuts, for example. The lower surface 22 of the housing 20 is the part that contacts the housing base 30 when the housing 20 is placed on the housing base 30. The distance between the lower surface 22 of the housing and hole 21A is distance Lh.

[0022] As shown in Figure 2, the housing base 30 is made of, for example, channel steel and is installed in a submerged section one level lower than the floor level FL. The housing base 30, which has a rectangular frame shape in plan view and extends horizontally perpendicular to the vertical direction V, surrounds the frame 10 installed on the bottom surface BL of the waterway, and the housing 20 is placed on the portion that extends along the water flow direction F. The housing base 30 is provided with a number of joining holes (not shown) which are joined to the housing 20 by, for example, bolts and nuts. The upper surface 32 of the housing base 30 is the part that contacts the lower surface 22 of the housing and serves as the reference position for placing the housing 20. The upper surface 32 of the housing base is also the part that contacts the lower surface 52 of the positioning jig 50, which will be described later. The position of the upper surface 32 of the housing base is higher than the floor level FL in the vertical direction V. In the right side views of Figures 2-4, only the sinking section extending in directions perpendicular to the water flow direction F and the vertical direction V is shown, while the sinking section extending in the water flow direction F is omitted from the illustration. Similarly, in the front views of Figures 1, 3, and 4, only the sinking section extending in the water flow direction F is shown, while the sinking section extending in directions perpendicular to the water flow direction F and the vertical direction V is omitted from the illustration.

[0023] [Positioning jig 50: See Figures 4 and 5] The positioning jig 50 is attached to the frame 10, eliminating the need for the complicated adjustment work required during the installation of the frame 10. In the upright position where the frame 10 is installed, the positioning jig 50 is attached to the joint between the frame 10 and the housing 20 on both sides of the frame 10, at the upper end of the vertical direction V, in directions perpendicular to the water flow direction F and the vertical direction V. In other words, two positioning jigs 50 are used during the installation of the frame 10. As shown in Figure 4, the positioning jig 50 is L-shaped in a front view except for the rib 54, and holes 51A and 51B are provided on the side 55 that contacts the frame 10, to which it is joined to the frame 10 by bolts 61 and nuts 62. In a right side view, the positioning jig 50 is longer than the length of the body portion of the frame 10. Even when the positioning jig 50 attached to the frame 10 is placed on the housing base 30, the frame 10 is supported by the positioning jig 50 so that the jack bolts 40 of the frame 10 do not come into contact with the bottom surface BL of the waterway. In other words, the positioning jig 50 can support the frame 10 in a suspended state.

[0024] As shown in Figure 5, the distance Lj from the lower surface 52 of the positioning jig 50 to the hole 51A is the same distance Lh as the distance between the hole 21A of the housing 20, which is joined to the frame 10, and the lower surface of the housing. In other words, the distance Lh from the lower surface 22 of the housing 20, which is the reference position for mounting the housing 20, to the hole 21A, which is the joint portion for joining the frame 10, and the distance Lj from the lower surface 52 of the positioning jig 50, which is the reference position for mounting the jig, to the hole 51A, which is the joint portion for joining the frame 10, are corresponding distances.

[0025] [Installation procedure for dust removal device 1: See Figures 3, 4, and 6] The installation procedure for the dust removal device 1 will be explained below. As shown in Figure 3, the frame 10 is lifted by a crane and moved to its installation position. Before the frame 10 is lifted by the crane, a positioning jig 50 capable of supporting the frame 10 is attached to the frame 10 (Step S101, Figure 6). Furthermore, when the frame 10 is lowered into the waterway, the jack bolts 40 are shortened so that the positioning jig 50 contacts and is placed on the housing base 30 before the jack bolts 40 contact the bottom surface BL of the waterway (Step S103, Figure 6).

[0026] As shown in Figure 4, the frame 10 is lowered and the positioning jig 50 is brought into contact with the housing base 30 (step S105, Figure 6). With the positioning jig 50 in contact with the housing base 30, the jack bolts 40 are adjusted until they contact the bottom surface BL of the waterway, making the frame 10 self-supporting (step S107, Figure 6). Making the frame 10 self-supporting means that even if the positioning jig 50 is removed, the frame 10 supported by the jack bolts 40 will not tip over and will maintain an upright position. The state in which the jack bolts 40 are in contact with the bottom surface BL of the waterway is shown in Figure 1(a). The adjustment of the jack bolts 40 may be considered complete when they make contact with the bottom surface BL of the waterway, or it may be considered complete when the tightening torque of the jack bolts 40 reaches a predetermined torque control value after making contact with the bottom surface BL of the waterway.

[0027] Once the jack bolts 40 have been adjusted, the positioning jig 50 is removed from the frame 10 (step S109, Figure 6). Then, the housing 20 is lowered and placed on the housing base 30 (step S111, Figure 6). Once the housing 20 is in place, the frame 10 and the housing 20 are joined together with bolts 61 and nuts 62 (step S113, Figure 6). These steps allow the dust removal device 1 to be installed without complicated work.

[0028] In other words, the installation method for the dust removal device 1 that collects debris in a waterway, which involves first installing a frame 10 on the bottom surface BL of the waterway, and then installing a housing 20 that is joined to the frame 10, comprises the following steps. The method for installing the dust removal device 1 includes step A, attaching a positioning jig 50 capable of supporting the frame 10 to the frame 10; step B, supporting the positioning jig 50 attached to the frame 10 on the housing base 30 which serves as the reference position for the housing 20; step C, making the frame 10 supported at the reference position self-supporting on the bottom surface BL of the waterway; step D, removing the positioning jig 50 from the frame 10; and step E, installing the housing 20 and joining it to the frame 10.

[0029] With the positioning jig 50 attached to the frame 10, placing the positioning jig 50 in contact with the housing base 30 completes the level adjustment of the holes 11A and 11B, which are the joints with the housing 20, and satisfies the installation accuracy of the frame 10. Furthermore, by simply adjusting the four jack bolts 40 and bringing each of them into contact with the bottom surface BL of the waterway, the installation of the frame 10, which has already been leveled, can be completed. In other words, to install the frame 10, which requires installation accuracy in millimeters, onto the bottom surface BL of the waterway, which requires accuracy in centimeters, the adjustment of the jack bolts 40 can be completed in one step without having to lift the frame 10 again, thus eliminating complicated work.

[0030] Furthermore, if the frame 10 needs to be lifted again, the position in which the frame 10 is lowered and placed after adjusting the jack bolts 40 may be slightly different from its position before lifting. If the position in which the frame 10 is placed is off, even if the jack bolts 40 themselves have been sufficiently adjusted, the level adjustment of the frame 10 may not be completed due to the influence of the bottom surface BL of the waterway, which has an accuracy of several centimeters. However, by attaching the positioning jig 50 to the frame 10 before installing the frame 10, the lifting and lowering of the frame 10 can be omitted, and the installation of the frame 10 can be completed without being affected by the accuracy of the bottom surface BL of the waterway.

[0031] [effect] The installation method of the dust removal device 1 described above has the following effects. [First Effect] With the positioning jig 50 attached to the frame 10, the positioning jig 50 can be brought into contact with the housing base 30 and placed on top, thereby completing the level adjustment of the holes 11A and 11B, which are the joints between the frame 10 and the housing 20. Furthermore, the adjustment of the jack bolts 40, which was conventionally required for level adjustment, can now be completed in a single step of contacting the bottom surface BL of the waterway, thus meeting the installation accuracy requirements for the frame 10 for installing the dust removal device 1. In other words, the dust removal device 1 can be installed without the need to repeatedly lift and lower the frame 10 and adjust the jack bolts 40, thus avoiding complicated work.

[0032] [Second Effect] Since the lifting and lowering operations of frame 10 by crane can be omitted, frame 10 can be installed without being affected by the accuracy of the bottom surface BL of the waterway.

[0033] In addition to the above, it is possible to select or replace the configurations listed in the above embodiments, or to change them to other configurations as appropriate, as long as they do not deviate from the spirit of the present invention. [Explanation of Symbols]

[0034] 1 Dust removal device 10 frames 11A,11B holes 20 Housing 21A,21B holes 22 Underside of Housing 30 Housing Base 32 Top surface of housing base 40 Jack bolts 50 Positioning jig 51A,51B holes 52 Lower surface of the jig 54 Ribs 55 Side view 61 volts 62 nuts Steps A, B, C, D, E BL Bottom F Water flow direction FL Floor Level Lh,Lj interval S101 Step S103 Step S105 Step S107 Step S109 Step S111 Step S113 Step V Vertical direction

Claims

1. A method for installing a dust removal device for collecting debris in a waterway, comprising installing a frame on the bottom surface of the waterway and then installing a housing to be joined to the frame, Step A involves attaching a positioning jig capable of supporting the frame to the frame, Step B involves supporting the positioning jig attached to the frame at the reference position of the housing, The system includes a step C that causes the frame, which is supported at the reference position, to stand independently on the bottom surface of the waterway, Installation method for a dust removal device.

2. Step D involves removing the positioning jig from the frame, The system includes step E, which involves installing the housing and joining it to the frame. A method for installing the dust removal device according to claim 1.

3. In step C, a height adjustment member provided on the frame, which can adjust the height of the frame, contacts the bottom surface of the waterway to make the frame self-supporting. A method for installing a dust removal device according to claim 1 or 2.

4. The positioning jig is supported at the reference position by the housing base. A method for installing a dust removal device according to claim 1 or 2.

5. The positioning jig is supported at the reference position by the housing base, The housing is placed on the housing base, A method for installing the dust removal device according to claim 2.

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