A foundation pit drainage filtration device for building construction

Abstract

The present invention relates to the field of sewage filtration, and particularly to a foundation pit drainage filtration device for building construction, which includes a diversion pipe, a plurality of filter plates, and a plurality of collection barrels. Impurities in the sewage gradually block the filter holes on the filter plates. The impact force of the water flow acting on the filter plates is greater than that of the collection barrels. The filter plates slide downward along the diversion pipe, opening the first water inlet and the second water inlet on the side wall of the collection barrels. The sewage carrying impurities directly enters the collection barrels through the first water inlet and the second water inlet, and the through holes in the collection barrels are blocked by impurities from the inside to the outside. During the downward sliding of the filter plates, the collection barrels extend, reducing the internal pressure of the collection barrels. The water flow enters the interior of the collection barrels through the through holes on the side walls of the collection barrels, cleaning the through holes blocked by impurities. The impurities are gradually collected inside the collection barrels, reducing the frequency of disassembly and cleaning due to the blockage of the filter plates, thereby increasing the cleaning cycle of the filtration device and improving the drainage work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of sewage filtration, and particularly to a foundation pit drainage and filtration device for building construction. Background Art

[0002] During the building construction process, it is often necessary to dig a soil pit, which is a foundation pit dug according to the base elevation and the foundation plan dimensions at the foundation design position. The foundation pit is a temporary project and needs to be backfilled after completing a certain work process. Due to various reasons such as weather, the foundation pit is likely to have accumulated water. During the backfilling process of the foundation pit, it is necessary to first drain the sewage in the foundation pit. Currently, a water pump or other drainage devices are usually used to drain the sewage from the foundation pit. To avoid environmental pollution caused by the direct discharge of impurities in the sewage in the foundation pit through the drainage device, a filtration device is conventionally used to filter and collect the impurities in the sewage, facilitating the centralized treatment of the impurities in the sewage. However, after the existing filtration device filters the sewage for a period of time, the impurities in the sewage are likely to block the filtration device, and then the filtration device needs to be disassembled and cleaned in a short period, reducing the drainage efficiency of the drainage device. Summary of the Invention

[0003] The present invention provides a foundation pit drainage and filtration device for building construction to solve the problem that the cleaning period of the existing filtration device blocked by impurities is relatively short.

[0004] The following technical solutions are adopted for a foundation pit drainage and filtration device for building construction of the present invention:

[0005] A foundation pit drainage and filtration device for building construction includes a diversion pipe, a plurality of filter plates, a plurality of collection barrels, and a transmission device; the plurality of filter plates are sequentially distributed around the axis of the diversion pipe, and each filter plate is provided with a plurality of filter holes. Each filter plate is vertically arranged in the vertically arranged diversion pipe, and each filter plate slides along the axis of the diversion pipe; the plurality of collection barrels and the plurality of filter plates are alternately arranged in sequence, and both end faces of each collection barrel are in a sealed state, and the side wall is provided with a plurality of through holes; the area of the upper end face of each collection barrel is smaller than the area of each filter plate; each collection barrel is telescopically arranged, and a first water inlet and a second water inlet are arranged on the side wall of each collection barrel; the transmission device is arranged between the plurality of collection barrels and the plurality of filter plates to make the filter plate slide downward along the axis of the diversion pipe when the number of filter holes on the filter plate is blocked to a first preset value, the collection barrel extends, and at the same time, the first water inlet and the second water inlet are opened.

[0006] Furthermore, a limiting device is further included, and the limiting device is used to prevent the plurality of filter plates from sliding downward along the axis of the diversion pipe, so that when the number of filter holes is blocked to the first preset value, the limiting assembly releases the limitation on the filter plate.

[0007] Further, it further includes multiple groups of flow-around devices. Each group of spoiler devices corresponds to a filter plate one by one. The flow-around device includes a spoiler plate. Leakage holes are provided on the spoiler plate. The spoiler plate is arranged below the filter plate and abuts against the collection bucket. The spoiler plate is connected to the diversion pipe in a one-way sliding manner, and is drivingly connected to the filter plate, so that when the filter plate moves up and down along the axis of the diversion pipe, the spoiler plate and the filter plate approach each other.

[0008] Further, the transmission device includes a first transmission component and a second transmission component. The first transmission component is arranged between multiple filter plates and the diversion pipe, and the second transmission component is arranged between multiple collection buckets and the diversion pipe. The second transmission component is drivingly connected to the first transmission component, so that when the filter plate slides up and down along the axis of the diversion pipe, the collection bucket is shortened or elongated.

[0009] Further, a fixed shaft is coaxially and fixedly arranged inside the diversion pipe; a first spiral groove is provided on the fixed shaft; the first transmission component includes a first fixed rod and a first fixed ring; the first fixed ring is slidably arranged along the first spiral groove; there are multiple first fixed rods, and one end of each first fixed rod is fixedly connected to a filter plate respectively, and the other end of each first fixed rod is slidably connected to the first fixed ring.

[0010] Further, a second spiral groove is provided on the fixed shaft. The spiral direction of the second spiral groove is opposite to that of the first spiral groove, and the second spiral groove is arranged above the first spiral groove; the second transmission component includes a second fixed rod and a second fixed ring; the second fixed ring is slidably arranged along the second spiral groove, and a linkage rod is fixedly arranged between the second fixed ring and the first fixed ring, and the linkage rod is telescopically arranged; there are multiple second fixed rods, and one end of each second fixed rod is fixedly connected to a collection bucket respectively, and the other end of each second fixed rod is slidably connected to a second fixed ring.

[0011] Further, multiple limiting grooves opening outwards are provided on the fixed shaft; the limiting device includes multiple limiting blocks. One end of each limiting block is slidably arranged in the limiting groove, the other end of each limiting block abuts against the filter plate, and a second elastic member is arranged between each limiting block and the end of the limiting groove. The second elastic member has the tendency to drive the limiting block to slide outwards along the limiting groove or has such a movement trend.

[0012] Further, a telescopic ratchet rod is fixedly arranged between the spoiler plate and the filter plate. The telescopic ratchet rod is used to pull the spoiler plate to slide synchronously when the filter plate moves upwards along the axis of the diversion pipe.

[0013] Further, the spoiler plate is connected to the fixed shaft through ratchet teeth, so that the spoiler plate slides in one direction along the fixed shaft.

[0014] Further, the through hole is arranged in the middle and lower part of the side wall of the collection bucket.

[0015] The beneficial effects of the present invention are as follows: A foundation pit drainage and filtration device for building construction according to the present invention includes a diversion pipe, a plurality of filter plates, and a plurality of collection barrels. The lower end of the diversion pipe is communicated with the water inlet end of the drainage device, and the sewage in the foundation pit enters from the upper end of the diversion pipe. When the sewage enters the diversion pipe, it has a certain flow rate. Since the upper ends of the plurality of collection barrels are all blocked, the water flow always has a certain impact force on the collection barrels. The plurality of filter plates and the plurality of collection barrels are alternately arranged in sequence, and the areas of the plurality of filter plates are larger than the areas of the upper ends of the plurality of collection barrels. However, a plurality of filter holes are provided on the filter plates. In the initial state, the filter plates block both the first water inlet and the second water inlet of the collection barrels. As the sewage enters the inside of the diversion pipe, the impurities in the sewage gradually block the filter holes on the filter plates. At this time, the impact force of the water flow acting on the filter plates is greater than the impact force of the collection barrels, causing the filter plates to slide downward along the diversion pipe, gradually opening the first water inlet and the second water inlet on the side wall of the collection barrels, and gradually washing away the impurities blocked on the filter plates by the impact force of the water flow. The sewage carrying impurities directly enters the collection barrels through the first water inlet and the second water inlet, and gradually blocks the through holes in the collection barrels from the inside to the outside with impurities. During the process of the filter plates sliding downward, the collection barrels extend, reducing the internal pressure of the collection barrels. The water flow enters the inside of the collection barrels through the through holes on the side walls of the collection barrels, cleaning the through holes blocked by impurities, and gradually collecting the impurities inside the collection barrels, reducing the frequency of disassembly and cleaning due to the blockage of the filter plates, thereby increasing the cleaning cycle of the filtration device and improving the drainage work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a foundation pit drainage and filtration device for building construction according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of a foundation pit drainage and filtration device for building construction according to an embodiment of the present invention with the diversion pipe hidden;

[0019] Figure 3 is Figure 2 a front view in the indicated direction;

[0020] Figure 4 is Figure 3 a partial enlarged view of part A in

[0021] Figure 5Exploded view of parts of the foundation pit drainage and filtration device for building construction in the embodiment of the present invention, with the diversion pipe, fixed shaft, and transmission device hidden;

[0022] Figure 6 Exploded view of the transmission device in the foundation pit drainage and filtration device for building construction in the embodiment of the present invention;

[0023] Figure 7 Structural schematic diagram of the fixed shaft in the foundation pit drainage and filtration device for building construction in the embodiment of the present invention;

[0024] Figure 8 Front view of the spoiler and part of the telescopic ratchet rod parts in the foundation pit drainage and filtration device for building construction in the embodiment of the present invention;

[0025] Figure 9 is Figure 8 Cross-sectional view in the A-A direction in

[0026] In the figure: 110, diversion pipe; 120, filter plate; 121, first part; 122, second part; 123, filter holes; 130, collection cylinder; 131, barrel plate; 132, blocking plate; 133, through hole; 134, first water inlet; 135, second water inlet; 140, fixed shaft; 141, first spiral groove; 142, second spiral groove; 143, connecting ring; 210, first fixing rod; 220, first rotating ring; 230, first fixing ring; 310, second fixing rod; 320, second rotating ring; 330, second fixing ring; 340, linkage rod; 410, limiting groove; 510, spoiler; 511, water leakage holes; 520, telescopic ratchet rod; 521, ratchet sleeve; 522, sliding rod; 523, ratchet tooth groove; 530, one-way ratchet rack. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] The serial numbers assigned to components in this document itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connected" and "coupled" as used in this application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] An embodiment of a foundation pit drainage filtration device for building construction according to the present invention, as Figures 1 to 9 shown, includes a diversion pipe 110, a plurality of filter plates 120, a plurality of collection barrels, a transmission device, and a limiting device.

[0031] The diversion pipe 110 is of a cylindrical structure, the diversion pipe 110 is vertically arranged and hollow inside, both the upper and lower ends of the diversion pipe 110 are provided with openings, the lower opening of the diversion pipe 110 is communicated with the water inlet end of the drainage device, and the sewage in the foundation pit enters from the upper opening of the diversion pipe 110. Under the suction of the drainage device, the sewage has a certain flow rate when entering the interior of the diversion pipe 110. A fixed shaft 140 is arranged inside the diversion pipe 110, and the fixed shaft 140 is connected to the diversion pipe 110 through a connecting ring 143, so that the fixed shaft 140 and the diversion pipe 110 are coaxially arranged.

[0032] A plurality of filter plates 120 are sequentially distributed around the axis of the diversion pipe 110. A plurality of filter holes 123 are provided on each filter plate 120. Each filter plate 120 is vertically arranged inside the vertically arranged diversion pipe 110, and each filter plate 120 slides along the axis of the diversion pipe 110. Specifically, at least two filter plates 120 are provided. The filter plate 120 includes a first part 121 with a fan-shaped structure and two second parts 122 with rectangular structures. A plurality of filter holes 123 are provided on both the first part 121 and the second parts 122 of the filter plate 120. The upper ends of the two second parts 122 of the filter plate 120 are respectively fixedly connected to the lower ends of the two radius sides of the first part 121. The arc-shaped side of the first part 121 of the filter plate 120 abuts against the inner side wall of the diversion pipe 110. The vertex of the first part 121 of the filter plate 120 abuts against the fixed column and can slide up and down along the fixed column.

[0033] A plurality of collection barrels are alternately arranged with a plurality of filter plates 120 in sequence, and both end faces of each collection barrel are in a sealed state, and the side wall is provided with a plurality of through holes 133. Specifically, at least two collection barrels are provided. The collection barrel 130 includes two barrel plates 131 and two sealing plates 132. The two barrel plates 131 are arranged at an angle. The two barrel plates 131 and the inner side wall of the diversion pipe 110 enclose a cylindrical structure. The two sealing plates 132 are respectively fixedly arranged at the upper and lower ends of the cylindrical structure enclosed by the two barrel plates 131 and the inner side wall of the diversion pipe 110. A first water inlet 134 and a second water inlet 135 are respectively provided on the two barrel plates 131. The first water inlet 134 and the second water inlet 135 are at the same height. A plurality of through holes 133 are provided on both barrel plates 131, and the through holes 133 are arranged below the first water inlet 134 and the second water inlet 135. The plurality of through holes 133 are used to filter the sewage carrying impurities entering the collection barrel. The lower parts of the two barrel plates 131 are telescopically arranged. When the two are extended, the number of through holes 133 on the two barrel plates 131 increases, and the internal space of the collection barrel 130 increases. The lower ends of the two barrel plates 131 and the lower sealing plate 132 are fixedly connected to the fixed shaft 140. Further, two collection barrels 130 and two filter plates 120 are alternately arranged in sequence, and the area of each sealing plate 132 is smaller than the area of the first part 121 of each filter plate 120. And the horizontal height of the upper end of the collection barrel 130 is higher than the horizontal height of the filter plate 120. The second part 122 of the filter plate 120 blocks the first water inlet 134 and the second water inlet 135 in the initial state.

[0034] The transmission device is arranged between two collection barrels and two filter plates 120, so that when the number of filter holes 123 on the filter plate 120 is blocked to a first preset value, the filter plate 120 slides downward along the axis of the diversion pipe 110, the collection barrel extends, and at the same time, the first water inlet 134 and the second water inlet 135 are opened. Specifically, the transmission device includes a first transmission component and a second transmission component. The first transmission component is arranged between two filter plates 120 and the fixed shaft 140, and the second transmission component is arranged between two collection barrels and the fixed shaft 140. The second transmission component is in transmission connection with the first transmission component, so that when the filter plate 120 slides up and down along the axis of the diversion pipe 110, the collection barrel shortens or extends.

[0035] In this embodiment, a first spiral groove 141 and a second spiral groove 142 are provided on the fixed shaft 140. The spiral directions of the first spiral groove and the second spiral groove 142 are opposite, and the first spiral groove 141 is arranged below the second spiral groove 142. The first transmission component includes a first fixed rod 210, a first rotating ring 220 and a first fixed ring 230. The first fixed ring 230 is slidably arranged along the first spiral groove 141, and the first fixed ring 230 is at the upper end of the first spiral groove 141 in the initial state. The first rotating ring 220 is slidably sleeved on the fixed shaft 140, and the first rotating ring 220 is rotatably connected to the lower end of the first fixed ring 230. At least two first fixed rods 210 are provided. One end of each first fixed rod 210 is fixedly connected to the first part 121 of a filter plate 120, and the other end of each first fixed rod 210 is fixedly connected to the first rotating ring 220. When the filter holes 123 on the first part 121 of the filter plate 120 are blocked to the first preset value, the filter plate 120 slides downward along the fixed shaft 140, driving the first rotating ring 220 to slide downward along the fixed shaft 140, and further causing the first fixed ring 230 to slide downward along the first spiral groove 141. The first fixed ring 230 is in transmission connection with the collection cylinder 130 through the second transmission component. When the first fixed ring 230 slides downward along the first spiral groove 141, the collection cylinder 130 extends.

[0036] In this embodiment, the second transmission assembly includes a second fixed rod 310, a second rotating ring 320, and a second fixed ring 330. The second fixed ring 330 is slidably arranged along the second spiral groove 142, and the second fixed ring 330 is at the lower end of the second spiral groove 142 in the initial state. A linkage rod 340 is fixedly arranged between the second fixed ring 330 and the first fixed ring 230, and the linkage rod 340 is telescopically arranged. The second rotating ring 320 is slidably sleeved on the fixed shaft 140 up and down, and the second rotating ring 320 is rotatably connected to the upper end of the second fixed ring 330. At least two second fixed rods 310 are provided. One end of each second fixed rod 310 is fixedly connected to a collection bucket, and the other end of each second fixed rod 310 is fixedly connected to the second rotating ring 320. When impacted by water flow, since the area of each blocking plate 132 is smaller than the area of the first part 121 of each filter plate 120, it causes the blocking plate 132 to have a tendency to slide downward, making the second fixed ring 330 at the lower end of the second spiral groove 142 in the initial state, and at the same time making the first fixed ring 230 at the upper end of the first spiral groove 141 in the initial state. When the first fixed ring 230 slides downward along the first spiral groove 141, the first fixed ring 230 rotates relative to the fixed shaft 140. Through the transmission of the linkage rod 340, the second fixed ring 330 undergoes an angular deflection, then the second fixed ring 330 slides upward along the second spiral groove 142, and at the same time makes the second rotating ring 320 slide upward along the fixed shaft 140, driving the collection bucket to extend.

[0037] The limiting device is used to prevent the two filter plates 120 from sliding downward along the axis of the diversion pipe 110, so that when the number of filter holes 123 is blocked to a first preset value, the limiting component releases the limitation on the filter plates 120. Specifically, at least two limiting grooves 410 with openings facing outward are provided on the fixed shaft 140. The limiting grooves 410 are rectangular structures, and the two limiting grooves 410 are at the same height on the fixed shaft 140. The limiting device at least includes two limiting blocks. The limiting blocks are right trapezoidal structures. The right-angle end of each limiting block is slidably arranged in the limiting groove 410, the hypotenuse end of each limiting block abuts against the lower end of the first part 121 of the filter plate 120, and a second elastic member is arranged between the right-angle end portion of each limiting block and the inner end portion of the limiting groove 410. The second elastic member has a tendency to drive the limiting block to slide outward along the limiting groove 410 or has such a movement tendency. Further, the second elastic member is a second spring, and the second spring is in a compressed state. When the filter holes 123 on the first part 121 of the filter plate 120 are blocked to the first preset value, the limiting block slides into the limiting groove 410, and the limiting block releases the limitation on the filter plate 120.

[0038] In this embodiment, there are at least two sets of flow deflection devices, and each set of flow disturbance devices corresponds to a filter plate 120 one by one. The flow deflection device includes a spoiler 510, and the shape of the spoiler 510 is the same as that of the first part 121 of the filter plate 120. Leakage holes 511 are provided on the spoiler 510 so that the liquid filtered by the filter plate 120 and the collection bucket is discharged through the leakage ports on the spoiler 510 into the diversion pipe 110. The spoiler 510 is arranged below the first part 121 of the filter plate 120 through a telescopic ratchet rod 520. The telescopic ratchet rod 520 can be shortened but not elongated. Specifically, the telescopic ratchet rod 520 includes a ratchet sleeve 521 and a sliding rod 522. An upward-opening chute is provided at the upper end of the ratchet sleeve 521, and a plurality of inward-opening ratchet grooves 523 are provided on the inner side wall of the chute in the vertical direction. A slidable ratchet block is provided in the ratchet groove 523. The lower end of the ratchet sleeve 521 is fixedly connected to the spoiler 510. A stop block is fixedly provided at the lower end of the sliding rod 522. The lower end of the sliding rod 522 is arranged in the chute, and the upper end of the sliding rod 522 is fixedly connected to the first part 121 of the filter plate 120. When the filter plate 120 slides downward, the stop block pushes the ratchet block to slide inward into the ratchet groove 523. When the filter plate 120 moves upward, the stop block is blocked by the ratchet block, causing the deflector plate to approach the filter plate 120.

[0039] The spoiler 510 is connected to the diversion pipe 110 in a one-way sliding manner. Specifically, a one-way ratchet rack 530 is vertically provided on the fixed shaft 140, and the ratchet teeth on the one-way ratchet rack 530 can be telescoped. The vertex of the spoiler 510 abuts against the ratchet rack, so that the spoiler 510 can only slide upward along the fixed shaft 140, reducing the agitation of the water flow on the sludge deposited at the lower end of the collection bucket.

[0040] In this embodiment, when the amount of the filter holes 123 on the first part 121 of the filter plate 120 is blocked to a first preset value, the impact force of the water flow on the first part 121 of the filter plate 120 is greater than the sum of the impact force of the water flow on the upper end plugging plate 132 of the collection cylinder 130 and the force of the limit block hindering the sliding of the filter plate 120.

[0041] Combined with the above embodiments, the working principle and process of the present invention are as follows:

[0042] During operation, the lower end of the diversion pipe 110 is connected to the drainage device, and the upper end of the diversion pipe 110 is connected to the sewage in the foundation pit. After starting the drainage device, the sewage enters the inside of the diversion pipe 110 with a certain flow rate. The sewage is filtered by at least two filter plates 120, and according to the degree of blockage of the filter plates 120, the impurities on the filter plates 120 are collected into the collection bucket, reducing the frequency of disassembly and cleaning due to the blockage of the filter plates 120.

[0043] The area of the first portion 121 of each filter plate 120 is larger than the area of each collection bucket sealing plate 132. Each filter plate 120 is provided with a plurality of filter holes 123. In the initial state, the impact force of sewage with a certain flow rate on the sealing plate 132 is greater than the impact force of the first portion 121 of the filter plate 120. A vertical second fixing rod 310 is fixed to the upper end of the upper sealing plate 132 of the collection bucket. The upper end of the second fixing rod 310 is fixedly connected to a second rotating ring 320. The second rotating ring 320 is slidably mounted on the fixed shaft 140. The lower end of the second rotating ring 320 is rotatably connected to a second fixing ring 330. The second fixing ring 330 can slide along a second spiral groove 142 provided on the fixed shaft 140. In the initial state, the second fixing ring 330 is at the lowest end of the second spiral groove 142. When sewage impacts the sealing plate 132 at the upper end of the collection bucket, the collection bucket remains stable.

[0044] As impurities in the sewage gradually accumulate on the first portion 121 of the filter plate 120, the permeable area of the first portion 121 of the filter plate 120 decreases, resulting in reduced air permeability. Each first portion 121 of the filter plate 120 is fixedly connected to a vertically disposed first fixing rod 210. The upper end of the first fixing rod 210 is fixedly connected to a first rotating ring 220, which is slidably mounted on the fixed shaft 140. The upper end of the first rotating ring 220 is rotatably connected to a first fixing ring 230, which is slidable along the first spiral groove 141 of the fixed shaft 140. A retractable linkage rod 340 is fixedly connected between the first fixing ring 230 and the second fixing ring 330. Under the impact of the sewage flow, the air permeability of the first portion 121 of the filter plate 120 decreases, and the impact force of the sewage on the first portion 121 of the filter plate 120 gradually increases. The fixed shaft 140 is provided with two outward-facing limit slots 410, each of which is provided with a limit block. A second spring is fixedly mounted between the limit block and the limit slot 410. The second spring has a predetermined elastic force, which tends to move the limit block outward. The outer beveled end surface of each limit block abuts the lower end surface of the first portion 121 of the filter plate 120, thereby preventing the first portion 121 of the filter plate 120 from sliding downward along the fixed shaft 140.

[0045] As the first part 121 of the filter plate 120 filters the sewage, when the impact force of the sewage acting on the first part 121 of the filter plate 120 is greater than the sum of the impact force of the sewage acting on the upper end plugging plate 132 of the collection barrel and the force of the limiting block hindering the downward sliding of the first part 121 of the filter plate 120, the first part 121 of the filter plate 120 slides rapidly downward along the fixed shaft 140, causing the first fixing ring 230 to slide downward along the first spiral groove 141 and deflect at an angle. Driven by the linkage rod 340 between the first fixing ring 230 and the second fixing ring 330, the second fixing ring 330 slides upward along the second spiral groove 142, and then the collection barrel is rapidly pulled upward and elongated by the second fixing rod 310.

[0046] When the filter plate 120 slides rapidly downward, the first water inlet 134 and the second water inlet 135 provided on the two barrel plates 131 of the collection barrel are rapidly opened by the two second parts 122 of the filter plate 120. Under the action of the water flow, the impurities blocked on the first part 121 of the filter plate 120 gradually enter the collection barrel along with the water flow. The sewage entering the collection barrel is filtered again through the through holes 133 on the two barrel plates 131 of the collection barrel, and the through holes 133 on the two barrel plates 131 are gradually blocked by impurities from the inside out.

[0047] After the filter holes 123 on the first part 121 of the filter plate 120 are cleaned, the air permeability of the first part 121 of the filter plate 120 increases. At this time, the impact force of the sewage on the upper end plugging plate 132 of the collection barrel is greater than the impact force on the first part 121 of the filter plate 120. The collection barrel is pushed by the water flow and shortened. The second fixing ring 330 slides downward along the second spiral groove 142. At the same time, the second fixing ring 330 deflects at an angle. Driven by the linkage rod 340, the first fixing ring 230 slides upward along the first spiral groove 141, driving the filter plate 120 to slide upward. The two second parts 122 of the filter plate 120 simultaneously block the first water inlet 134 and the second water inlet 135 on the collection barrel. Under the action of the water flow impact force, the height of the collection barrel and the filter plate 120 is restored to the initial height.

[0048] During the rapid elongation of the collection barrel, the internal space of the collection barrel suddenly increases. At this time, the first water inlet 134 and the second water inlet 135 on the collection barrel have not been opened by the second part 122 of the filter plate 120. The filtered water flows from the outside to the inside, cleaning the impurities blocked on the two barrel plates 131 and causing the impurities to gradually accumulate on the lower plugging plate 132 of the collection barrel.

[0049] The lower end of the first part 121 of each filter plate 120 is fixedly connected with a spoiler 510 through a telescopic ratchet rod 520. The spoiler 510 is provided with a water leakage port. The sewage filtered by the first part 121 of the filter plate 120 and the sewage flowing out of the through hole 133 of the barrel plate 131 are discharged through the water leakage port into the diversion pipe 110. The diversion plate is connected with the fixed shaft 140 through a one-way ratchet rack 530, so that the diversion plate can only slide upward. During the process of the filter plate 120 sliding downward along the fixed shaft 140, the telescopic ratchet rod 520 shortens, and at this time, the spoiler 510 remains stationary. When the filter plate 120 slides upward along the fixed shaft 140, the diversion plate is driven to move upward synchronously, and a gap gradually appears between the spoiler 510 and the lower end of the collection barrel, and the spoiler 510 is always at the same height as the impurities accumulated in the collection barrel. When the collection barrel extends, it reduces the entry of sewage into the collection barrel from the lower part of the barrel plate 131 and at the same time reduces the disturbance of the sewage to the impurities in the collection barrel.

[0050] In other embodiments, the first part of the filter plate is a structure in which two inclined plates are fixedly connected, so that the structure of the first part of the filter plate is higher in the middle than at both ends, which is convenient for cleaning the first part of the filter plate by sewage.

[0051] In other embodiments, the spoiler is a fan-shaped structure, and the two radius sides of the spoiler are arranged at intervals with the barrel plate. The sewage filtered by the filter plate and the water flowing out of the collection barrel both flow out from the gap between the spoiler and the barrel plate.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A foundation pit drainage filtering device for building construction, characterized in that: include: diversion tube; Multiple filter plates are sequentially distributed around the axis of the guide tube, each filter plate is provided with multiple filter holes, each filter plate is vertically arranged in the vertically arranged guide tube, and each filter plate slides along the axis of the guide tube; Multiple collecting buckets, multiple collecting buckets and multiple filter plates are arranged alternately in sequence, and both end surfaces of each collecting bucket are in a blocked state, and the side walls are set with multiple through holes; the area of the upper end surface of each collecting bucket is smaller than the area of each filter plate; each collecting bucket can be telescopically arranged, and the side wall of each collecting bucket is set with a first water inlet and a second water inlet; a transmission device, the transmission device is arranged between the multiple collecting buckets and the multiple filter plates, so that when the number of filter holes on the filter plate is blocked to a first preset value, the filter plate slides downward along the axis of the guide pipe, the collecting bucket extends, and the first water inlet and the second water inlet are opened at the same time.

2. The foundation pit drainage filtration device for building construction according to claim 1, characterized in that: It also includes a limiting device for preventing the plurality of filter plates from sliding downward along the axis of the guide tube, so that when the number of filter holes is blocked to a first preset value, the limiting assembly releases the limit on the filter plates.

3. The foundation pit drainage filtering device for building construction according to claim 2, wherein: It also includes multiple groups of flow bypass devices, each group of flow spoiler devices corresponds to a filter plate one-to-one, the flow bypass device includes a spoiler, the spoiler is provided with a water leakage hole, the spoiler is arranged below the filter plate, the spoiler abuts against the collection barrel, the spoiler is unidirectionally slidably connected to the guide pipe, the spoiler and the filter plate are transmission-connected so that when the filter plate moves up and down along the axis of the guide pipe, the spoiler and the filter plate approach each other.

4. The foundation pit drainage filtering device for building construction according to claim 3, characterized in that: The transmission device includes a first transmission assembly and a second transmission assembly. The first transmission assembly is arranged between multiple filter plates and the guide pipe, and the second transmission assembly is arranged between multiple collection buckets and the guide pipe. The second transmission assembly is connected to the first transmission assembly so that when the filter plate slides up and down along the axis of the guide pipe, the collection bucket is shortened or extended.

5. The foundation pit drainage filtering device for building construction according to claim 4, wherein: A fixed shaft is coaxially fixed inside the guide tube; a first spiral groove is provided on the fixed shaft; the first transmission assembly includes a first fixed rod and a first fixed ring; the first fixed ring is slidably arranged along the first spiral groove; a plurality of first fixed rods are provided, one end of each first fixed rod is fixedly connected to a filter plate, and the other end of each first fixed rod is slidably connected to the first fixed ring.

6. The foundation pit drainage and filtration device for building construction according to claim 5, characterized in that: A second spiral groove is provided on the fixed shaft, the spiral direction of the second spiral groove is opposite to the spiral direction of the first spiral groove, and the second spiral groove is provided above the first spiral groove; the second transmission assembly includes a second fixed rod and a second fixed ring; the second fixed ring is slidably arranged along the second spiral groove, and a linkage rod is fixedly arranged between the second fixed ring and the first fixed ring, and the linkage rod is telescopically arranged; there are multiple second fixed rods, one end of each second fixed rod is fixedly connected to a collection bucket, and the other end of each second fixed rod is slidably connected to a second fixed ring.

7. The foundation pit drainage filtration device for building construction according to claim 6, wherein: A plurality of outward-opening limit grooves are provided on the fixed shaft; the limit device includes a plurality of limit blocks, one end of each limit block can be slidably provided in the limit groove, the other end of each limit block abuts against the filter plate, and a second elastic member is provided between each limit block and the end of the limit groove, and the second elastic member has the function of driving the limit block to slide outward along the limit groove or having the tendency to move.

8. The pit drainage filtering device for building construction according to claim 7, characterized in that: A telescopic ratchet rod is fixedly arranged between the spoiler and the filter plate, and the telescopic ratchet rod is used to traction the spoiler to slide synchronously when the filter plate moves upward along the axis of the diversion pipe.

9. A foundation pit drainage and filtration device for building construction according to claim 8, characterized in that: The spoiler is connected to the fixed shaft through ratchet teeth, so that the spoiler slides unidirectionally along the fixed shaft.

10. A foundation pit drainage and filtration device for building construction according to claim 9, characterized in that: The through hole is arranged in the middle and lower part of the side wall of the collection bucket.

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