Upflow Inclined Plate Sedimentation Apparatus Having Sliding Assembly Structure Using Lug Pin and Method for Assembling Inclined Plates

Abstract

This invention relates to an upward-flow inclined plate sedimentation device with a sliding assembly structure using lug pins and a method for assembling inclined plates. The upward-flow inclined plate sedimentation device of the sliding assembly structure using the lug pin of the present invention for this purpose comprises: a plurality of lug pins in which a pin body is assembled into an assembly hole formed in the inclined plate such that a locking head is integrally formed at both ends of the pin body and the locking head protrudes upward and downward from the inclined plate, respectively; and a plurality of stiffeners that are arranged in the width direction between mutually adjacent inclined plates and have a pin groove formed along the length direction in which a locking head is inserted and locked into the opposing surface facing the inclined plate, so that a pair is installed to face each other with the inclined plate in between by a single lug pin, wherein the end of the pin groove in the length direction of the stiffener is inserted into the locking head of the lug pin and the stiffener is slid to be assembled so as to be locked into the plurality of lug pins. Thus, since the stiffener can be engaged with multiple lug pins by a single assembly operation in which it slides along the longitudinal direction, there is no need to repeatedly insert and rotate individual fasteners to fasten them as in the conventional method. As a result, the assembly process of the inclined plate, stiffener, and lug pin is significantly simplified, which shortens working time and significantly reduces labor costs, thereby improving productivity.

Description

Technology Field

[0001] This invention relates to an upward-flow inclined plate sedimentation device and an inclined plate assembly method using a sliding assembly structure utilizing a lug pin, and more specifically, to an upward-flow inclined plate sedimentation device and an inclined plate assembly method using a sliding assembly structure utilizing a lug pin in which a plurality of inclined plates are assembled at a certain distance from each other via a stiffener and a lug pin, and the stiffener is assembled by a locking connection with a plurality of lug pins by a single sliding operation. Background Technology

[0002] In general, physical, chemical, and biological treatment methods are used in wastewater treatment and water purification processes to remove suspended solids and flocs contained in raw water.

[0003] Meanwhile, the sedimentation process is a representative physical treatment method that separates solids by gravity, and inclined plate sedimentation devices equipped with multiple inclined plates inside the sedimentation tank are widely used to improve sedimentation efficiency.

[0004] The aforementioned inclined plate sedimentation devices are broadly classified into horizontal flow and upward flow types depending on the direction of water flow. The horizontal flow type is structured so that raw water flows horizontally and sludge settles to the bottom, while the upward flow type is structured so that raw water rises from the bottom to the top, causing flocs to attach to and settle on the surface of the inclined plates. In particular, upward flow inclined plate sedimentation devices are widely used when treating high-turbidity raw water, as the amount of floc generated is large; this is done to prevent accumulation and improve sedimentation efficiency.

[0005] The above-described upward-flow inclined plate sedimentation device features a modular structure, primarily manufactured in modular units at a factory and then transported to the site for assembly. In the sedimentation space at the bottom of the module, multiple inclined plates are spaced apart from each other at a predetermined incline, and a trough is provided at the top for collecting treated water, configured to allow the treated water passing through the inclined plates to overflow and be discharged. An upward-flow inclined plate sedimentation device with this structure has the advantage of reducing retention time and increasing treatment capacity relative to the same area.

[0006] Meanwhile, although STS (stainless steel) with excellent rigidity can be used as the material for the above inclined plate, non-metallic materials such as ABS, PVC, and FRP are generally widely used because sludge adhesion and accumulation problems are likely to occur.

[0007] Inclined plates made of non-metallic material are typically manufactured with a thickness of 1 to 3 mm to consider weight and cost-effectiveness, and stiffeners are placed between adjacent inclined plates to prevent sagging, and the stiffeners are fixed to the inclined plates by lug pins.

[0008] Meanwhile, regarding a pre-existing art document related to an inclined plate sedimentation device in which multiple inclined plates are fixed at regular intervals by stiffeners and lug pins, Registered Patent No. 2396772 (registered on May 6, 2022, hereinafter referred to as 'Prior Art Document 1') has been proposed. In the inclined plate sedimentation device according to Prior Art Document 1, a plate-shaped spacer (1) is placed between the inclined plates, and the spacer (1) is fixed to the inclined plates by a fixing clip (2).

[0009] As shown in FIG. 1a, a coupling member (3) having a female coupling member (4) formed at both ends of the spacer (1) for coupling a fixing clip (2) is integrally provided, and a male coupling member (5) that is inserted into the female coupling member (4) and coupled male and female is integrally provided on the fixing clip (2).

[0010] Meanwhile, the fixed clip (2) is inserted into a clip mounting slot formed on the inclined plate and then rotated to be fixed, and a pair of strip parts (6) forming the male coupling part (5) are contracted to be gathered and inserted into the female coupling part (4). As approximately 5 fixed clips (2) are typically used to fix one side of the spacer (1) to the inclined plate, there is an inefficiency in that, during the process of manufacturing the inclined plate sedimentation device, the worker must repeat the process of inserting the fixed clip (2) into the clip mounting slot, rotating to fix it, and then joining the spacer (1) and the fixed clip (2) male and female hundreds of times. Additionally, the male coupling part (5), which is elastically deformed and inserted into the female coupling part (4), has a problem in that the fastening force decreases due to reduced elasticity or deformation during repeated assembly or long-term use, and thus the spacer (1) cannot be stably fixed.

[0011] Another prior art document is Registered Patent No. 0888713 (registered on March 6, 2009, hereinafter referred to as 'Prior Art Document 2'). In the inclined plate sedimentation device according to Prior Art Document 2, a plate-shaped stiffener (7) is disposed between the inclined plates, and the stiffener (7) is fixed to the inclined plates by a joint (8).

[0012] As shown in FIG. 1b, a C-shaped coupling groove is formed at both ends of the stiffener (7), with the opening being narrower than the inside. On one side of the joint (8), a rotating part (8a) is integrally provided, which passes through the coupling hole of the inclined plate and is inserted into the coupling groove of the one side stiffener (7) and then rotated to be fixed. On the other side, a fixing part (8b) is integrally provided, which is inserted into the coupling groove of the other side stiffener (7) and fixed.

[0013] According to prior art document 2, there is an inefficiency in that the above-mentioned operation must be repeated hundreds of times for a number of joints used in the manufacture of an inclined plate sedimentation device, because the joint (8) must be positioned so that the coupling groove of one side stiffener (7) matches the coupling hole formed in the inclined plate, and then the rotating part (8a) of the joint (8) must be inserted into the coupling groove through the coupling hole and the joint (8) must be rotated and fixed.

[0014] As such, conventionally, a method of assembling the inclined plate and stiffener individually using a fixing clip or joint is used, which results in a very complex process and excessive working time.

[0015] Meanwhile, the upper part of the upward-flow inclined plate sedimentation device is equipped with a trough having multiple orifices formed on the bottom surface, or a porous pipe is installed to allow the treated water passing through the inclined plate sedimentation device to be discharged overflow.

[0016] However, the precision of uniformity in the trough in which the orifice is formed may vary depending on the shape of the orifice, the distance and spacing of the orifice, and the difference in orifice loss values ​​due to changes in flow rate is large, so when multiple sedimentation devices are connected in a long line, there is a problem that it is difficult to maintain uniform efficiency due to the difference in flow velocity before and after.

[0017] In addition, the discharge structure for treated water using the porous pipe mentioned above requires an additional on-site assembly process during installation and increases costs due to the complex structure; furthermore, since the top of the inclined plate is open and sunlight enters, problems such as algae growth and sludge resuspension may occur.

[0018] Meanwhile, in the case of conventional upward-flow inclined plate sedimentation devices, raw water flowing in from the bottom and sides collides with the central part of the inclined plate sedimentation device, causing a flow velocity imbalance where the flow velocity in the central part becomes faster than on both sides, and as a result, there is a problem in that the overall sedimentation efficiency of the floc is reduced due to the decrease in uniform efficiency. Prior art literature

[0019] Registered Patent No. 2396772 (Registered May 6, 2022) Registered Patent No. 0888713 (Registered March 6, 2009) The problem to be solved

[0020] This invention was devised to solve the above-mentioned problems, and the purpose of this invention is to provide an upward-flow inclined plate sedimentation device and an inclined plate assembly method using a sliding assembly structure in which a stiffener is assembled to be connected to a plurality of lug pins in a single assembly operation by a sliding assembly method.

[0021] Another objective of this invention is to provide an upward-flow inclined plate sedimentation device and an inclined plate assembly method of a sliding assembly structure that can reduce friction occurring between the lug pin and the stiffener during the sliding assembly operation of the stiffener, allow the stiffener to be displaced in response to instantaneous changes in the flow rate or water pressure of the fluid passing around it, and prevent localized stress concentration at the joint between the stiffener and the lug pin, thereby preventing damage to the stiffener and the lug pin.

[0022] Another objective of this invention is to provide an upward-flow inclined plate sedimentation device and an inclined plate assembly method having a sliding assembly structure that can effectively prevent damage to the locking part of a locking head that is inserted into the pin groove of a stiffener and locked in place.

[0023] Another objective of this invention is to provide an upward-flow inclined plate sedimentation device with a sliding assembly structure and an inclined plate assembly method capable of forming a uniformly distributed fluid velocity distribution throughout the upward-flow inclined plate sedimentation device. means of solving the problem

[0024] The upward-flow inclined plate sedimentation device of the sliding assembly structure using a lug pin according to the present invention, which performs the task of achieving the above-mentioned purpose and eliminating conventional problems, comprises a plurality of inclined plates (20) spaced apart from each other while maintaining a predetermined inclination inside a support frame (10) having a bottom surface open to allow raw water to flow in, a pin body (31) of a lug pin (30) assembled in each assembly hole (21) formed along the longitudinal direction (D1) of the inclined plate (20), and a pair of stiffeners (40) installed so as to face each other with the inclined plate (20) in between by a single lug pin (30), wherein the lug pin (30) has a catch head (32) integrally provided at both ends of the pin body (31) and protrudes up and down from the inclined plate (20), respectively, and the stiffener (40) between the mutually adjacent inclined plates (20) the length of the inclined plate (20). A plurality of pin grooves (412) are provided on the opposing surface (411) facing the inclined plate (20) so as to extend along the length direction (D1) and are engaged by the relative sliding movement of the stiffener (40) while inserted into the engaging head (32). The engaging head (32) is formed with a pair of engaging parts (321) integrally protruding, and the inner surface (322) of the engaging head (32) is formed to be inclined in a direction forming an acute angle (θ1) with respect to the central axis (S) of the pin body (31) so that only the outer end contacts the engaging surface (414) of the pin groove (412) to engage.

[0025] delete

[0026] Additionally, a recess (33) continuous on the inner surface (322) may be formed between the pin body (31) and the locking head (32) to extend the effective length (l) of the locking part (321) and increase the elasticity of the locking part (321).

[0027] Additionally, the outer surface (323) of the locking head (32) may be formed to protrude as an arc-shaped curved surface having a predetermined curvature, and the inner guide surface (415) of the pin groove (412) facing the outer surface (323) of the locking head (32) may be formed to be recessed as an arc-shaped curved surface having a predetermined curvature so as to disperse the contact stress of the outer surface (323).

[0028] Additionally, the apparatus further includes a trough (50) located on the upper part of an inclined plate assembly formed by assembling a plurality of inclined plates (20) into a multi-layer structure by a plurality of stiffeners (40) and lug pins (30), through which treated water processed through the inclined plates (20) flows in and is discharged; wherein the trough (50) comprises a V-shaped bottom (51) having a pair of inclined surfaces (53) that are inclined downward from both sides in the width direction (D2) toward the center; It includes a pair of side walls (52) that extend vertically upward from both ends in the width direction (D2) of the bottom (51), are spaced apart from the support frame (10) to form a rising flow path (UF) through which the treated water rises, and have a plurality of overflow holes (521) formed along the length direction (D3) to form a weir structure; and among the plurality of stiffeners (40) arranged along the width direction (D2), at least one lower flow hole (43) may be formed at the bottom of the remaining stiffeners (40), excluding the central stiffener (40) and the outermost stiffener (40), and at least one upper flow hole (44) may be formed at the top.

[0029] Additionally, the centers of the lower flow hole (43) and the upper flow hole (44) may be formed at a relatively higher position so as to be spaced further from the upper surface of the inclined plate (20) than the centers of the inflow holes (11) provided at the lower ends of both sides of the support frame (10).

[0030] Additionally, it may further include a plurality of support bars (60) that are bent into a V-shape to be in close contact with the V-shaped bottom (51) of the trough (50) and are installed spaced apart from each other along the longitudinal direction (D3) to be fixed to the bottom (51) and to support the trough (50); and a plurality of level adjustment devices (70) provided on the support frame (10) and supporting the support bars (60) so that the level of the trough (50) can be adjusted by the vertical movement of the support bars (60).

[0031] Additionally, it may further include an upper anti-slip member (110) installed to contact the central part of the inclined plate (20) on the front inner side of the support frame (10) to prevent the inclined plate (20) from sliding; and a lower anti-slip member (120) installed to contact the lower part of the inclined plate (20) on the front inner side of the support frame (10) to prevent the inclined plate (20) from sliding.

[0032] Meanwhile, the inclined plate assembly method of the present invention comprises a unit assembly step (S10) in which an inclined plate (20) is assembled to a plurality of positioned lug pins (30) and a stiffener (40) is assembled to a lug pin (30) protruding through the inclined plate (20), so that a plurality of inclined plates (20) are assembled such that they are spaced apart from each other at a certain distance via the stiffener (40) and the lug pin (30). The unit assembly step (S10) comprises an inclined plate placement step (S11) in which an inclined plate (20) is placed such that a plurality of positioned lug pins (30) each penetrate a plurality of assembly holes (21) formed along the longitudinal direction (D1) of the inclined plate (20); The method is characterized by comprising: a stiffener placement step (S12) of arranging the stiffener (40) such that the locking head (32) of the lug pin (30) protruding through the inclined plate (20) is inserted into the longitudinal end (D1) of the pin groove (412) provided on one side of the stiffener (40); a stiffener assembly step (S13) of assembling the stiffener (40) by sliding it along the longitudinal direction (D1) so as to be locked and coupled with a plurality of lug pins (30); and a lug pin installation step (S14) of installing a plurality of lug pins (30) by inserting them into the pin groove (412) provided on the other side of the stiffener (40), wherein each lug pin (30) is installed so as to be positioned at a location corresponding to a plurality of assembly holes (21) formed along the longitudinal direction (D1) of the inclined plate (20). Effects of the invention

[0033] According to the upward-flow inclined plate sedimentation device and inclined plate assembly method of the sliding assembly structure using the lug pin of this invention, since the stiffener can be engaged with multiple lug pins by a single assembly operation in which it slides along the longitudinal direction, there is no need to repeatedly insert and rotate individual fastening parts to fasten them as in the conventional method. As a result, the assembly process of the inclined plate, stiffener, and lug pin is significantly simplified, which shortens working time and significantly reduces labor costs, thereby improving productivity.

[0034] In particular, the inner surface of the locking head of the lug pin is formed to be inclined at an acute angle to the inner locking surface of the pin groove, thereby reducing friction during sliding assembly of the stiffener, allowing even long stiffeners to be smoothly slid assembled. Furthermore, the stiffener is not rigidly fixed but can be displaced within the range allowed by the gap formed between the inner surface and the locking surface, thus preventing the stiffener and lug pin from being damaged by impact loads caused by sudden fluctuations in the flow rate or water pressure of the surrounding fluid.

[0035] Furthermore, the outer surface of the locking head and the guide surface of the pin groove are formed as curved surfaces having a predetermined curvature, thereby dispersing contact stress and preventing localized stress concentration. Additionally, the effective length of the locking part is extended and elasticity is increased by the recess formed between the locking head and the pin body with the lug pin, thereby effectively preventing the locking part that is locked and coupled inside the pin groove from breaking.

[0036] In addition, the upper flow holes and lower flow holes formed in some stiffeners, and the V-shaped bottom and weir structures formed in the troughs, can form a uniform flow velocity distribution of the fluid passing through the upward-flow inclined plate sedimentation device, thereby improving sedimentation efficiency.

[0037] In addition, since the trough is in close contact with the V-shaped bottom and supported by multiple support bars spaced apart along the length, it can be stably fixed by resisting buoyancy and load while spaced apart from the upper part of the inclined plate, and since the height can be adjusted by a level adjustment device, the overflow water level conditions can be precisely set to suit the installation environment. Brief explanation of the drawing

[0038] FIGS. 1a and 1b are structural diagrams illustrating a member used to maintain the spacing and support of inclined plates in an inclined plate sedimentation device according to the prior art. FIG. 2 is a perspective view of an upward-flow inclined plate sedimentation device according to one embodiment of the present invention, FIG. 3 is a side view of an upward-flow inclined plate sedimentation device according to one embodiment of the present invention, FIG. 4 is a cross-sectional view illustrating a state in which a stiffener according to one embodiment of the present invention is fixed to an inclined plate by a lug pin, FIG. 5 is a perspective view of an inclined plate according to one embodiment of the present invention, FIG. 6 is a perspective view of a lug pin according to one embodiment of the present invention, FIG. 7 is a cross-sectional view of a lug pin according to one embodiment of the present invention, FIG. 8 is a perspective view illustrating a state in which a stiffener according to one embodiment of the present invention is installed on an inclined plate. FIG. 9a is a cross-sectional view of a stiffener according to one embodiment of the present invention, FIG. 9b is a cross-sectional view illustrating a state in which a stiffener according to one embodiment of the present invention is coupled to an inclined plate. FIG. 10 is a side view of a stiffener showing a comparison of the positions of a lower flow hole and an upper flow hole according to one embodiment of the present invention, FIG. 11 is a front view illustrating a state in which a trough is installed on a support frame according to one embodiment of the present invention. FIG. 12 is a perspective view of a trough according to one embodiment of the present invention, FIG. 13 is a front view of a level adjustment device according to one embodiment of the present invention, FIG. 14 is a block diagram illustrating unit assembly steps in chronological order according to one embodiment of the present invention, FIG. 15 is an example diagram illustrating a state in which an inclined plate is positioned so that a positioned lug pin penetrates the assembly hole of the inclined plate. FIG. 16 is an example diagram illustrating a state in which a stiffener is positioned such that the locking head of a lug pin is inserted into the end of the stiffener in the pin groove length direction. FIG. 17 is an example diagram illustrating a state in which a stiffener is moved along the longitudinal direction and installed on an inclined plate. FIG. 18 is an example diagram illustrating a state in which a lug pin is installed to be positioned on a stiffener fixed to an inclined plate. FIG. 19 is an image of the computational fluid dynamics (CFD) analysis result of a sedimentation device according to one embodiment of the present invention. Specific details for implementing the invention

[0039] In the following, preferred embodiments of the invention are described in detail based on the details illustrated in the drawings; however, specific descriptions of related known functions or configurations are omitted if it is determined that such descriptions may unnecessarily obscure the essence of the invention.

[0040] An upward-flow inclined plate sedimentation device with a sliding assembly structure using a lug pin according to one embodiment of the present invention comprises a support frame (10), an inclined plate (20), a lug pin (30), and a stiffener (40) as shown in FIGS. 2 to 4. A plurality of inclined plates (20) are assembled by the stiffener (40) and the lug pin (30) so as to be spaced apart from each other while maintaining a predetermined inclination inside the support frame (10), and are manufactured in a factory in a modular form. Depending on the site scale, two or more inclined plate sedimentation devices may be installed connectedly. Meanwhile, the inclined plate (20), the lug pin (30), and the stiffener (40) may be formed of a metal or non-metal material.

[0041] The support frame (10) supports a plurality of inclined plates (20) at a predetermined incline, and includes an inclined front and rear surface corresponding to the incline of the inclined plates (20), and has an open top and bottom surface so that fluid flows in from the bottom and is discharged from the top.

[0042] Additionally, the left and right sides of the support frame (10) are closed to form a sedimentation space together with the front and rear, and the two sides may be closed by a separate plate or by the outermost stiffener (40) among the stiffeners (40) installed to support the inclined plate (20). In addition, a plurality of inlet holes (11) may be formed at the lower ends of the left and right sides to equalize the flow velocity distribution along with increasing the raw water processing capacity. The following description is based on an embodiment in which the left and right sides of the support frame (10) are formed by the outermost stiffener (40) and a plurality of inlet holes (11) are formed at the lower end of the outermost stiffener (40).

[0043] Meanwhile, as shown in FIG. 3, an upper anti-slip member (110) and a lower anti-slip member (120) are provided on the front inner side of the support frame (10), which is formed by sequentially assembling a plurality of inclined plates (20) using a lug pin (30) and a stiffener (40) to prevent slippage of the end inclined plate (20).

[0044] The upper anti-slip device (110) may include a pair of position adjustment blocks (111) that are movable to move closer to or further away from the end inclined plate (20) and are fixed by bolts, spaced apart horizontally on both the left and right sides of the support frame (10), and an anti-slip bar (112) that is connected to the pair of position adjustment blocks (111) and contacts the end inclined plate (20) to prevent slipping.

[0045] The lower anti-slip member (120) may include an anti-slip plate (121) that contacts the lower end of the end inclined plate (20), including a bent portion (121a) bent at the same angle as the angle of the inclined plate (20), and a plurality of position adjustment members (123) that are connected to the anti-slip plate (121) through a screw shaft (122) and adjust the position of the screw shaft (122) so that the anti-slip plate (121) moves closer to or further away from the end inclined plate (20).

[0046] As shown in FIG. 5, the above-mentioned inclined plate (20) is a square plate, and a plurality of assembly holes (21) through which the lug pin (30) is installed are formed in a distributed manner, and each assembly hole (21) is formed as a rectangular hole extending for a predetermined length along the longitudinal direction (D1) of the inclined plate (20).

[0047] At this time, the assembly holes (21) are formed in rows by the inclined plates (20) being spaced apart at regular intervals along the length direction (D1), and the rows are formed in multiple numbers along the width direction (D2) of the inclined plates (20), so that the assembly holes (21) are distributed in a grid shape throughout the inclined plates (20).

[0048] As shown in FIG. 3, a plurality of these inclined plates (20) are installed spaced apart from each other in a state where they are tilted at a predetermined angle from the front to the rear direction (D3) of the support frame (10). Thus, between the adjacent inclined plates (20), a narrow flow path is formed in which turbulence is suppressed and laminar flow is induced during the process of the raw water flowing upward, thereby allowing the floc particles contained in the raw water to settle stably.

[0049] Meanwhile, in the following description, a flow path formed between the inclined plates (20) and partitioned by a stiffener (40) is defined as an inclined plate flow path, wherein the outermost stiffener (40) o ) and the adjacent stiffener (40 m The channel formed between ) is defined as an edge sloped plate channel, and the stiffener (40 m ) and central stiffener (40 c The channel formed between ) is defined as the central inclined plate channel.

[0050] As shown in FIGS. 4, 6 and 7, the above lug pin (30) secures the stiffener (40) to the inclined plate (20) and includes a pin body (31) that is assembled by passing through the assembly hole (21) of the inclined plate (20), and a locking head (32) that is integrally formed to protrude from both ends of the pin body (31).

[0051] Meanwhile, the pin body (31) has a rectangular structure that extends a predetermined length along the longitudinal direction (D1) corresponding to the assembly hole (21) so that it is assembled in a state where rotation is suppressed by penetrating the assembly hole (21), and the locking head (32), which is integrally formed at each end of the pin body (31), also has a rectangular structure that extends a predetermined length along the longitudinal direction (D1), so that the lug pin (30) is formed as a rectangular structure overall.

[0052] The above-mentioned locking head (32) is inserted into the pin groove (412) formed in the stiffener (40) and locked in place. It passes through the assembly hole (21) and has a width (W) wider than the pin body (31), and at both ends, a locking part (321) is integrally formed to be locked in place inside the pin groove (412) of the stiffener (40).

[0053] Additionally, the above-mentioned catch head (32) is formed as a rectangular structure in which a semicircular cross-section convex outwardly extends for a predetermined length along the length direction (D1), thereby having a flat inner surface (322) and a convex outer surface (323).

[0054] Meanwhile, the flat inner surface (322) is inclined outwardly to form an acute angle (θ1) with respect to the central axis (S) of the pin body (31), thereby reducing friction between the locking head (32) and the stiffener (40) during the process of sliding the stiffener (40) along the longitudinal direction (D1) so that the locking head (32) is inserted into the pin groove (412) of the stiffener (40). This allows the stiffener (40) to be slid smoothly without applying much force, and the assembled stiffener (40) can be displaced in response to fluctuations in the flow rate or water pressure of the raw water flowing around it. Accordingly, when the flow rate or water pressure fluctuates, the stiffener (40) is temporarily displaced, thereby mitigating the concentration of excessive load on the connection point between the stiffener (40) and the lug pin (30), which can prevent damage to the stiffener (40) or the lug pin (30).

[0055] Additionally, a recess (33) may be formed between the pin body (31) and the locking head (32) to extend the effective length (l) of the locking part (321) and prevent damage to the locking part (321).

[0056] The above-mentioned recess (33) is located between the pin body (31) and the locking head (32) so as to be continuous with the inner surface (322) of the locking head (32), and is formed concavely to a predetermined depth from the surface of the pin body (31), thereby extending the effective length (l) of the locking part (321).

[0057] Meanwhile, the locking part (321) with an extended effective length (l) can be elastically deformed more easily in response to the displacement of the stiffener (40), so that excessive stress is concentrated on the locking part (321) according to the displacement of the stiffener (40), thereby preventing the locking part (321) from being damaged.

[0058] The above stiffener (40) is installed between mutually adjacent inclined plates (20) to support the inclined plates (20) so that they maintain a constant spacing without sagging. As shown in FIGS. 8 and 9a, it is formed of a plate material that extends long along the length direction (D1) of the inclined plates (20) and has a height corresponding to the spacing between mutually adjacent inclined plates (20), and a plurality of them are arranged along the width direction (D2) to support the inclined plates (20) as a whole.

[0059] Additionally, at both ends of the stiffener (40) adjacent to the inclined plate (20), a connecting part (41) is integrally provided so as to extend along the longitudinal direction (D1), having a facing surface (411) facing the inclined plate (20) and a pin groove (412) into which the locking head (32) is inserted and locked. A pair of connecting parts (41) integrally provided at both ends of the stiffener (40) in this manner may be formed symmetrically to each other.

[0060] More specifically, the joint (41) has a triangular cross-sectional structure having a pair of inclined surfaces (41a) so that the settled floc does not accumulate on the upper side but flows down naturally, and the stiffener body (42) formed between the pair of joints (41) is formed eccentrically such that its centerline (L1) is offset in one direction from the centerline (L2) of the joint (41).

[0061] In this way, when a stiffener (40) is installed at the outermost edge such that the connecting part (41) is eccentrically formed on one side of the stiffener body (42), as shown in FIGS. 9a and 9b, the centerline (L1) of the stiffener body (42) is positioned further outward than the centerline (L2) of the connecting part (41), thereby reducing the projected area occupied by the stiffener (40) on the inclined plate (20) and minimizing the reduction in the effective sedimentation area of ​​the inclined plate caused by the stiffener (40).

[0062] Meanwhile, the pin groove (412) is formed on the opposing surface (411) to communicate with the assembly hole (21) of the inclined plate (20), and includes an inlet (413) with a relatively narrow width, a locking surface (414) facing the inner surface (322) of the locking head (32) in an extended form from the inlet (413), and a guide surface (415) facing the outer surface (323) of the locking head (32). The guide surface (415) is formed as a curved surface in the shape of an arc with a predetermined curvature so as to disperse the contact stress of the outer surface (323) of the locking head (32). Due to the structural characteristics without corners, stress concentration does not occur, thereby preventing the stiffener (40) or the lug pin (30) from easily breaking even when the stiffener (40) and the lug pin (30) are formed of a non-metallic material, and the natural of the stiffener (40) during fluctuations in flow rate or water pressure Displacement is allowed, enabling structural flexibility.

[0063] The pin groove (412) is formed to extend along the longitudinal direction (D1) and open to both sides of the coupling portion (41), so that the locking head (32) can be inserted through the open longitudinal end (D1) of the pin groove (412) and slide.

[0064] Meanwhile, if the joint part (41) of the stiffener (40) made of a non-metallic material has sharp edges, it is susceptible to damage and prone to concentrated loads. Therefore, it is desirable to prevent damage by rounding all edges of the joint part (41) to disperse the concentrated loads that may occur when the inclined plate (20) shakes.

[0065] The stiffener (40) configured as described above may have one or more holes formed for fluid flow depending on the installation location.

[0066] That is, a stiffener (40) installed to be located in the center of the width direction (D2) as shown in FIG. 8 m ) has the form of a plate without holes, and the outermost stiffener (40o At least one inlet hole (11) is formed at the bottom of the ), and the central stiffener (40 c ) and outermost stiffener (40 o The stiffener (40) between the remaining parts excluding ) m At the bottom and top of the ) one or more bottom flow holes (43) and top flow holes (44) are formed, respectively.

[0067] In this way, the central stiffener (40 c ) and outermost stiffener (40 o The remaining stiffeners (40) excluding ) m By forming flow holes (43)(44) dispersed at the top and bottom of the ) so that fluid flow between the inclined plate channels partitioned by the stiffener (40) is possible, and together with the inclined bottom (51) of the trough (50) described later, the effect of increasing the flow velocity of the central channel is achieved.

[0068] Meanwhile, if the above-mentioned inlet hole (11), lower flow hole (43), or upper flow hole (44) is formed in multiple numbers, each may be formed spaced apart along the length direction (D1).

[0069] Additionally, the lower flow hole (43) and the upper flow hole (44) have a rectangular structure extending along the longitudinal direction (D1) as shown in FIG. 10, and are formed at a relatively high position such that their center is further away from the upper surface of the inclined plate (20) than the center of the inlet hole (11), so that the floc settled on the inclined plate (20) is not refloated by the flow of fluid flowing through the lower flow hole (43) or the upper flow hole (44) during the process of flowing down the inclined plate (20).

[0070] In the upward-flow inclined plate sedimentation device of the present invention configured as described above, as shown in FIGS. 2 and 3, a plurality of inclined plates (20) are assembled into a multi-layer structure by a plurality of stiffeners (40) and lug pins (30), and a trough (50) may be included to discharge the treated water from which floc has been removed by the inclined plates (20) to the outside.

[0071] The above trough (50) includes a bottom (51) and a pair of side walls (52) as shown in FIGS. 11 and 12, and is configured to form a discharge channel for discharged treated water by forming the side walls (52) in a vertical position at each end of the width direction (D2) of the bottom (51).

[0072] At this time, the pair of side walls (52) are each spaced apart from the support frame (10), thereby forming an upward flow path (UF) through which the treated water rises between the trough (50) and the support frame (10). Additionally, a plurality of overflow holes (521) forming a weir structure are formed along the longitudinal direction (D3) in each side wall (52), so that the treated water rising through the upward flow path (UF) flows into the trough (50) through the overflow holes (521).

[0073] In this way, an upward flow path (UF) through which the treated water, from which floc has been removed by the inclined plate (20), rises is formed on each side of the trough (50), and a weir structure is formed on both sides of the trough (50), so that a plurality of inclined plate sedimentation devices are formed to extend long in correspondence with the capacity of the sedimentation tank, or so that a constant flow rate is overflowed into the trough (50) and discharged regardless of location, even if there is a large change in flow rate according to season and time.

[0074] The bottom (51) of the above trough (50) has a V-shaped cross-section to have a pair of inclined surfaces (53) that are inclined downward from both ends toward the center, thereby enabling uniform efficiency by equalizing the flow velocity of the rising fluid regardless of the position of the flow path formed between the stiffeners (40).

[0075] That is, when the bottom (51) of the above trough (50) is flat, the fluid flow rate rising through the inclined plate channel located in the center among the inclined plate channels formed between each stiffener (40) is relatively slow, so there is a problem that the processing efficiency varies depending on the channel position.

[0076] On the other hand, if the bottom (51) is formed in a V-shape as in the trough (50) of this invention, the flow velocity of the treated water discharged from the central inclined plate channel increases as it flows along the inclined surface (53) of the bottom (51), thereby increasing the flow velocity of the treated water rising through the central inclined plate channel. This offsets the difference in flow velocity between the central inclined plate channel and the edge inclined plate channel, thereby enabling a uniform flow velocity throughout regardless of the position of the channel.

[0077] In addition, the treated water flowing into the trough (50) through the overflow hole (521) flows rapidly toward the center of the trough (50) along the slope of the bottom (51), so that foreign substances or sludge can be reduced from adhering to the inner surface of the trough (50) even during long-term use.

[0078] The angle of inclination (θ2) of the inclined bottom (51) can be formed to be 5 to 20 degrees. If the angle of inclination (θ2) is less than 5 degrees, the increase in flow velocity in the central part is minimal, and if it exceeds 20 degrees, the total volume becomes excessively large due to the increase in the depth of the trough (50), making it difficult to secure installation space. Therefore, it is preferable that the angle of inclination (θ2) of the trough bottom (51) be formed to be 5 to 20 degrees.

[0079] Meanwhile, as illustrated in FIGS. 11 to 13, a support bar (60) that supports the trough (50) so that it is spaced apart and fixed to the upper part of the inclined plate (20), and a level adjustment device (70) that adjusts the level of the trough (50) by the up and down movement of the support bar (60) may be further included.

[0080] The support bar (60) is bent into a V-shape to extend along the V-shaped bottom (51) of the trough (50), welded to the bottom (51) of the trough (50) to move together with the trough (50), and is provided with a fixing plate (61) at both ends that is secured to a level adjustment device (70) by fastening a bolt and nut while in close contact with the side wall (52) of the support frame (10).

[0081] A plurality of these support bars (60) are installed at regular intervals along the length direction (D3) of the trough (50), thereby enabling the trough (50) to be stably fixed in response to both buoyancy and load.

[0082] The level adjustment device (70) is installed on a support frame (10) to support the support bar (60) by being connected to a fixed plate (61) formed integrally at the end of the support bar (60) with a bolt and nut. It may include a height adjustment bracket (71) formed integrally with a bent piece (711) protruding outwardly from the top of the fixed plate (61) and positioned to face the fixed plate (61) on the outside of the support frame (10), and a height adjustment bolt (72) that supports the bent piece (711) at a predetermined height by passing through the bent piece (711) from a reference piece (101) formed integrally on the support frame (10) and being fastened with a plurality of nuts, thereby supporting the bent piece (711) at a predetermined height.

[0083] Meanwhile, the height adjustment bracket (71) and the fixing plate (61) are mutually connected by a bolt and nut and fixed to the support frame (10), and the fixing plate (61) is provided with a through hole (611) in the shape of an elongated hole that extends vertically to allow vertical movement, through which a bolt passes.

[0084] Accordingly, when multiple upward-flow inclined plate sedimentation devices equipped with troughs (50) are manufactured in a factory in modular units and brought to the site for installation, the height of the troughs (50) of each sedimentation device can be individually adjusted to match each other to suit the site structure. Accordingly, even when multiple sedimentation devices are connected at the same height along the length of the sedimentation tank and the length of the troughs (50) becomes long, the height of the overflow holes (521) of the troughs (50) equipped in each sedimentation device can be set uniformly, thereby enabling uniform water collection.

[0085] A plurality of such level adjustment devices (70) may be installed on a support frame (10) such that they are spaced apart along the length direction (D3) of the trough (50), corresponding to a plurality of support bars (60) spaced apart along the length direction (D3) of the trough (50).

[0086] Meanwhile, a cover (80) that blocks the inflow of sunlight through the rising channel (UF) formed between the trough (50) and the support frame (10) may be provided at the top of the rising channel (UF). One side of the cover (80) is fixed by being bolted to the support frame (10), and the other side is mounted on the trough (50). By being formed to extend along the longitudinal direction (D3) of the trough (50) in this structure, sunlight can be blocked from entering the top of the rising channel (UF).

[0087] Meanwhile, a method for assembling inclined plates according to one embodiment of the present invention is to assemble inclined plates (20) to a plurality of positioned lug pins (30) and to assemble a stiffener (40) to a lug pin (30) protruding through the inclined plate (20), by sequentially repeating a unit assembly step (S10) so that a plurality of inclined plates (20) are assembled such that they are spaced apart from each other at a certain distance through the stiffener (40) and the lug pin (30).

[0088] The above-determined plurality of lug pins (30) may be formed by installing the plurality of lug pins (30) in the pin groove (412) of the pre-assembled stiffener (40). As shown in FIG. 4, the pre-assembled stiffener (40) may be formed by installing the plurality of end pins (90), each having a catch head (92) integrally formed at one end, on the rear surface of the support frame (10), and by engaging the one-sided coupling part (41) of the stiffener (20) with the catch head (92) of the end pin (90). At this time, since the catch head (92) of the end pin (90) may be formed with the same structure as the catch head (92) of the lug pin (30), a detailed description thereof is omitted.

[0089] The unit assembly step (S10) according to one embodiment proceeds sequentially, including an inclined plate placement step (S11), a stiffener placement step (S12), a stiffener assembly step (S13), and a lug pin installation step (S14), as shown in FIG. 14.

[0090] The above inclined plate placement step (S11) is a step of placing the inclined plate (20) such that a plurality of positioned lug pins (30) as shown in FIG. 15 each penetrate the assembly holes (21) formed in the inclined plate (20), and the lug pins (30) that protrude through the assembly holes (21) due to the placement of the inclined plate (20) are constrained at each position by the assembly holes (21).

[0091] Meanwhile, FIG. 14 illustrates the placement of the inclined plate (20) with the stiffener (40) standing upright in a position close to vertical, but in actual operation, the inclined plate placement step (S11) can be performed while the stiffener (40) is kept horizontal so that the positioned lug pin (30) does not slide due to gravity.

[0092] The above stiffener placement step (S12) is a step of placing a stiffener (40) to be assembled to a lug pin (30) protruding through the assembly hole (21). As shown in FIG. 16, the stiffener (40) is placed such that the catch head (32) of a lug pin (30) located at one end of a plurality of lug pins (30) located along the longitudinal direction (D1) of the inclined plate (20) is inserted into the longitudinal direction (D1) end of a pin groove (412) provided on one side.

[0093] The above stiffener assembly step (S13) is a step of fixing the stiffener (40) to the lug pin (30). As shown in FIG. 17, the stiffener (40) is fixed to the inclined plate (20) by sliding along the longitudinal direction (D1) of the inclined plate (20) and sequentially connecting with a plurality of lug pins (30) located along the longitudinal direction (D1).

[0094] The inner surface (322) of the above-mentioned locking head (32) is formed at an angle so as to minimize friction with the inner locking surface (414) of the pin groove (412), thereby allowing the stiffener (40) to slide smoothly without applying much force.

[0095] Meanwhile, the above stiffener placement step (S12) and stiffener assembly step (S13) can be repeated continuously in correspondence with the number of stiffeners (40) to be installed.

[0096] The above lug pin installation step (S14) is a step of installing a plurality of lug pins (30) in a pin groove (412) provided on the other side of a stiffener (40) that has one end fixed to an inclined plate (20) as shown in FIG. 18. The plurality of lug pins (30) are installed in the pin groove (412) by sliding from the end in the longitudinal direction (D1) of the pin groove (412) so that a locking head (32) is inserted, and each lug pin (30) is positioned by being installed in the pin groove (412) so that it is located at a place corresponding to an assembly hole (21) formed in the inclined plate (20).

[0097] As described above, the stiffener (40) of this invention can be fixed by being combined with a plurality of lug pins (30) located along the longitudinal direction (D1) through a single sliding operation, thereby eliminating the hassle of having to assemble the lug pins (30) individually with the stiffener (40), allowing the stiffener assembly work to be carried out simply and quickly.

[0098] Meanwhile, the upward-flow inclined plate sedimentation device of the present invention configured as described above is installed inside the sedimentation tank, and raw water is introduced through the inlet hole (11) formed at the bottom of the support frame (10) and the bottom of the outermost stiffener (40) as shown in FIG. 11.

[0099] The flow of raw water entering through the inlet hole (11) obstructs the flow of raw water rising through the edge inclined plate channel connected to the inlet hole (11), thereby mitigating the rising flow velocity of the edge channel, so that the difference in rising flow velocity between the edge inclined plate channel and the central inclined plate channel is reduced.

[0100] In particular, some of the raw water rising along the edge inclined plate channel flows into the central inclined plate channel through the lower flow hole (43), and some of the raw water rising through the central inclined plate channel flows into the edge inclined plate channel through the upper flow hole (44) at the end of the channel, so the difference in flow velocity between the edge inclined plate channel and the central inclined plate channel can be effectively reduced.

[0101] Meanwhile, the floc contained in the raw water settles on the upper surface of the inclined plate (20) as the raw water rises through the inclined plate channel, and the settled floc moves downward along the inclined plate (20) and accumulates on the bottom (51) of the sedimentation tank.

[0102] Through this process, the treated water discharged from the upper part of the inclined plate channel flows directly into the rising channel (UF) depending on the position of the channel, or flows at a high speed along the inclined bottom (51) of the trough (50) and flows into the rising channel (UF).

[0103] That is, since the edge inclined plate channel is located directly below the rising channel (UF), the treated water discharged from the edge inclined plate channel flows directly into the rising channel (UF). On the other hand, since the central inclined plate channel is located below the trough (50), the treated water discharged from the central inclined plate channel flows along the inclined surface (53) of the trough (50) and flows into the rising channel (UF) at a relatively fast speed, so the flow velocity of the central inclined plate channel and the edge inclined plate channel can be equalized.

[0104] Meanwhile, when the water level of the treated water flowing into the above-mentioned rising channel (UF) reaches the overflow hole (521) formed in the trough (50), the treated water flows into the interior of the trough (50) through the overflow hole (521) and is discharged.

[0105] Figures 19a to 19f show the results of a Computational Fluid Dynamics (CFD) analysis of the internal flow of an upward-flow inclined sedimentation device. The flow field was simulated based on a structure with a total of 12 inclined plates, and the overflow hole spacing was set to 80 mm. The velocity distribution and flow characteristics in multiple channels formed by the inclined plates and stiffeners are illustrated. According to the velocity contour results for each cross-section (P1, P2, P3, P4), it is confirmed that the flow velocity is formed with similar magnitude and distribution shape throughout the channels. In particular, it can be confirmed that the flow velocity is maintained uniformly with almost no velocity deviation in each channel between the inclined plates.

[0106] In addition, it can be confirmed that a uniform flow field is formed overall because the difference between the maximum and minimum flow velocities between adjacent channels is minimal, and the velocity difference is approximately 0.0005 m / s, confirming that the velocity deviation between channels is practically negligible. The vector distribution results show that the fluid moves upward while maintaining a stable, aligned flow along each channel, confirming that the phenomenon of velocity concentration or decrease in a specific channel is suppressed.

[0107] These results indicate that the inflow flow is evenly distributed into and discharged into each flow path through the organic combination of the lower flow hole and upper flow hole formed in the stiffener, the V-shaped bottom of the trough, and a plurality of overflow holes formed on the side walls of the trough to form a weir structure, thereby ensuring uniform flow characteristics in which no difference in flow velocity between flow paths occurs, and thus providing a stable sedimentation environment throughout the device.

[0108] It will be understood by those skilled in the art that the upward-flow inclined plate sedimentation device and inclined plate assembly method using a sliding assembly structure according to the present invention, which are described above, can be implemented in other specific forms without altering the technical concept or essential features of the present invention.

[0109] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting, and the scope of the invention is defined by the claims set forth below rather than by the foregoing detailed description, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included within the scope of the invention. Explanation of the symbols

[0110] 10: Support frame 11: Inlet hole 20: Inclined plate 21: Assembly hole 30: Lug pin 31: Pin body 32: Locking head 321: Locking part 322: Medial side 33: Depression 40: Stiffener 411: Opposing face 412: Pin groove 414: Locking surface 415: Guide surface 42: Stiffener body 43: Bottom movable hole 44: Top movable hole 50: Truff 51: Bottom 52: Side wall 521: Overflow hole 53: Inclined surface 60: Support bar 70: Level adjuster 80: Cover 110: Upper jungle prevention zone 120: Lower jungle prevention zone

Claims

Claim 1 In an upward-flow inclined plate sedimentation device, a plurality of inclined plates (20) are provided spaced apart from each other while maintaining a predetermined inclination inside a support frame (10) having an open bottom surface for raw water to flow in, a pin body (31) of a lug pin (30) is assembled in each assembly hole (21) formed along the longitudinal direction (D1) of the inclined plate (20), and a pair of stiffeners (40) are installed facing each other with the inclined plate (20) in between by means of a single lug pin (30), wherein the lug pin (30) has a catch head (32) integrally provided at both ends of the pin body (31) and protrudes upward and downward from the inclined plate (20), and the stiffeners (40) extend along the longitudinal direction (D1) of the inclined plate (20) between mutually adjacent inclined plates (20), and a plurality of them are arranged in the width direction (D2) and face the inclined plate (20). An upward-flow inclined plate sedimentation device with a sliding assembly structure using a lug pin, characterized in that a pin groove (412) is provided on the opposing surface (411) so as to extend along the longitudinal direction (D1) and is engaged by the relative sliding movement of the stiffener (40) while inserted into the engaging head (32), and the engaging head (32) has a pair of engaging parts (321) integrally formed protruding, and the inner surface (322) of the engaging head (32) is formed to be inclined in a direction forming an acute angle (θ1) with respect to the central axis (S) of the pin body (31) so that only the outer end contacts the engaging surface (414) of the pin groove (412) and is engaged. Claim 2 delete Claim 3 An upward-flow inclined plate sedimentation device with a sliding assembly structure using a lug pin, characterized in that, in the first paragraph, a recess (33) continuous on the inner surface (322) is formed between the pin body (31) and the locking head (32) to extend the effective length (l) of the locking part (321) and increase the elasticity of the locking part (321). Claim 4 An upward-flow inclined plate sedimentation device with a sliding assembly structure using a lug pin, characterized in that, in claim 1, the outer surface (323) of the locking head (32) is formed to protrude as a curved surface in the shape of an arc having a predetermined curvature, and the inner guide surface (415) of the pin groove (412) facing the outer surface (323) of the locking head (32) is formed to be recessed as a curved surface in the shape of an arc having a predetermined curvature so as to disperse the contact stress of the outer surface (323). Claim 5 In claim 1, the invention further comprises a trough (50) located on the upper part of an inclined plate assembly formed by assembling a plurality of inclined plates (20) into a multi-layer structure by means of a plurality of stiffeners (40) and lug pins (30), through which treated water processed through the inclined plates (20) flows in and is discharged; wherein the trough (50) comprises a V-shaped bottom (51) having a pair of inclined surfaces (53) that are inclined downward from both sides in the width direction (D2) toward the center; The upward-flow inclined plate sedimentation device of a sliding assembly structure using a lug pin comprises: a pair of side walls (52) that extend vertically upward from both ends in the width direction (D2) of the bottom (51), are spaced apart from the support frame (10) to form an upward flow path (UF) through which treated water rises, and have a plurality of overflow holes (521) formed along the length direction (D3) to form a weir structure; and among a plurality of stiffeners (40) arranged along the width direction (D2), at least one lower flow hole (43) is formed at the bottom of the remaining stiffeners (40), excluding the central stiffener (40) and the outermost stiffener (40), and at least one upper flow hole (44) is formed at the top. Claim 6 An upward-flow inclined plate sedimentation device with a sliding assembly structure using a lug pin, characterized in that, in claim 5, the center of the lower flow hole (43) and the upper flow hole (44) is formed at a relatively higher position so as to be spaced further from the upper surface of the inclined plate (20) than the center of the inflow hole (11) provided at the lower part of both sides of the support frame (10). Claim 7 In claim 5, the upward-flow inclined plate sedimentation device of a sliding assembly structure using a lug pin is further characterized by including: a plurality of support bars (60) that are bent into a V-shape to be in close contact with the V-shaped bottom (51) of the trough (50) and are installed spaced apart from each other along the longitudinal direction (D3) to be fixed to the bottom (51) and to support the trough (50); and a plurality of level adjustment devices (70) provided on the support frame (10) and supporting the support bars (60) so that the level of the trough (50) can be adjusted by the up and down movement of the support bars (60). Claim 8 An upward-flow inclined plate sedimentation device with a sliding assembly structure using a lug pin, further comprising: an upper anti-slip member (110) installed to contact the central part of the inclined plate (20) on the front inner side of the support frame (10) to prevent the inclined plate (20) from sliding; and a lower anti-slip member (120) installed to contact the lower part of the inclined plate (20) on the front inner side of the support frame (10) to prevent the inclined plate (20) from sliding. Claim 9 delete

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