Deep foundation pit drainage structure

Abstract

The utility model discloses a deep foundation pit drainage structure which comprises a drainage ditch. A plurality of water collecting wells; one water filtering device is arranged in one water collecting well, any water filtering device comprises a box body, a water inlet is formed in the top of the box body, and a water outlet and a slag outlet are formed in the lower portion of the box body; the drainage pipe is communicated with the water outlet; the multiple filter plates are arranged in the box body at intervals in the vertical direction, the filter plates are in seamless connection with the inner side wall of the box body, and each filter plate is provided with an opening in the radial direction of the filter plate; in any two adjacent filter plates, the sizes of the filter holes in the upper filter plate are larger; the first rotating rod penetrates through the middle parts of the filter plates and is rotationally connected with the filter plates; each push plate is arranged above the corresponding filter plate, one end of each push plate is fixedly connected with the first rotating rod, and the other end of each push plate extends to the inner side wall close to the box body. According to the utility model, the filter plate is not easy to block, and impurities are easy to collect.

Description

Technical Field

[0001] The utility model relates to the field of deep foundation pit construction, and more specifically, to a deep foundation pit drainage structure. Background Art

[0002] A deep foundation pit refers to a project with an excavation depth of more than 5 meters (including 5 meters), or a project with a depth of less than 5 meters but with particularly complex geological conditions, surrounding environment and underground pipelines.

[0003] The most common foundation pit drainage system currently consists of a drainage ditch at the bottom of the pit, running along the inner wall of the pit. Drain holes are located at the bottom of the ditch. Wastewater and rainwater in the pit flow into the ditch and then into the drainage holes, allowing them to be pumped out for unified treatment. However, wastewater and rainwater often contain large amounts of sediment. To prevent this from being pumped out, a filter is currently installed on the inlet pipe of the self-priming pump.

[0004] Existing deep foundation pit drainage structures use filtering devices, such as the ultra-large deep foundation pit drainage system disclosed in Application No. 202411099594.6. The water filtering device includes a water filter housing, which is equipped with a first filter screen and a second filter screen. The first filter screen is located at the water inlet of the water filter housing and can filter out larger impurities in the water flow. The second filter screen is located at the water outlet of the water filter housing and can filter out smaller impurities such as sand in the water flow to prevent clogging. A debris removal push plate is slidingly provided on the second filter screen. The debris removal push plate slides on the second filter screen, removing sand and other impurities attached to the second filter screen and pushing the impurities into the impurity guide box, thereby preventing the second filter screen from being clogged by impurities and improving filtration efficiency. However, there is no component for cleaning the first filter screen. If the first filter screen becomes clogged, the water flow entering the water filter housing will decrease, affecting the drainage efficiency of the deep foundation pit. Utility Model Content

[0005] The purpose of the utility model is to provide a deep foundation pit drainage structure. By arranging filter plates from top to bottom in sequence and making the filter holes on each filter plate gradually smaller in size from top to bottom, impurities in the water flow can be filtered step by step. By arranging a push plate above each filter plate and providing an opening on each filter plate, the push plate can be rotated to push impurities on the filter plate toward the opening and be discharged through the opening and the slag outlet, making the filter plate less likely to be clogged and impurities easier to collect.

[0006] In order to achieve these purposes and other advantages of the present invention, a deep foundation pit drainage structure is provided, comprising:

[0007] A drainage ditch is provided at the bottom of the foundation pit and surrounds the foundation pit;

[0008] a plurality of water collection wells arranged at intervals in the drainage ditch;

[0009] Multiple water filtering devices, one water filtering device is provided in a water collection well, and any water filtering device includes:

[0010] The box body is a hollow cylindrical body with a water inlet at the top and a water outlet and a slag outlet at the bottom;

[0011] a drain pipe, which is communicated with the water outlet and connected to a water pump;

[0012] A plurality of filter plates are vertically spaced apart and arranged in the box body, the filter plates being circular and fixed to the inner sidewalls of the box body and seamlessly connected, each filter plate being provided with an opening along its radial direction, and each opening not being opposite to the water inlet; of any two adjacent filter plates, the filter holes on the upper filter plate are larger in size, and the projection of the upper opening projected vertically downward on a horizontal plane is within the projection of the lower opening projected vertically downward on a horizontal plane; the heights of the water outlet and the slag outlet are both lower than the height of the lowest filter plate, and the opening on the lowest filter plate is connected to the slag outlet;

[0013] A first rotating rod is vertically arranged and passes through the middle of each filter plate and is rotatably connected to each filter plate. The first rotating rod rotates under the driving force;

[0014] There are multiple push plates, the number of which is equal to that of the filter plates and corresponds one to one. Each push plate is respectively arranged above the corresponding filter plate and close to the corresponding filter plate. One end of each push plate is fixedly connected to the first rotating rod, and the other end extends to the inner side wall near the box body.

[0015] Preferably, in the deep foundation pit drainage structure, the projections of the push plates projected vertically downward onto the horizontal plane do not overlap.

[0016] Preferably, the deep foundation pit drainage structure further comprises:

[0017] The partition is arranged in the box body, the interior of the partition is hollow, the top is open, the bottom is closed and opposite to the opening on the lowest filter plate, the partition is fixedly connected to the lowest filter plate, and the interior of the partition is connected to the opening on the lowest filter plate and the slag outlet.

[0018] Preferably, in the deep foundation pit drainage structure, the slag outlet is arranged on the side wall of the box body, and the bottom of the baffle is gradually inclined downward toward the side wall of the box body.

[0019] Preferably, in the deep foundation pit drainage structure, the first rotating rod is driven by power to move up and down between a first position and a second position, and the height of the second position is higher than that of the first position; when the first rotating rod is in the first position, each push plate is close to its corresponding filter plate;

[0020] The deep foundation pit drainage structure also includes:

[0021] 18. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod having a check valve in said linking rod and said adjusting base is pivotally connected to said linking rod. said linking rod having a check valve in said linking rod and said adjusting base is pivotally connected to said linking rod.

[0022] Preferably, in the deep foundation pit drainage structure, the bottom of the slag outlet is flush with the lowest point of the bottom of the baffle, a temporary storage box is provided on one side of the box body, and a detachable cover is provided on the top of the temporary storage box, and the slag outlet is connected to the interior of the temporary storage box; the projections of the cross sections at various locations on the upper part of the baffle projected vertically downward on the horizontal plane coincide with the projections of the through hole projected vertically downward on the horizontal plane; when the first rotating rod moves up and down between the first position and the second position, the upper part of the baffle is always located in the through hole.

[0023] Preferably, in the deep foundation pit drainage structure, a plurality of first guide grooves are arranged at intervals on the side walls of the box body, each first guide groove is arranged vertically, and a plurality of first guide blocks are arranged at intervals along the circumferential direction at the outer edge of each movable plate, and the number of first guide blocks on each movable plate is equal to the number of first guide grooves and corresponds one to one, and each first guide block is slidably arranged in the corresponding first guide groove.

[0024] Preferably, in the deep foundation pit drainage structure, when the first rotating rod is in the second position, the top of the first rotating rod is in contact with or separated from the top of the box body by a certain distance; the interior of the upper portion of the first rotating rod is hollow, and a plurality of second guide grooves are provided on the inner side wall of the upper portion of the first rotating rod at intervals, and each second guide groove is provided vertically;

[0025] The deep foundation pit drainage structure also includes:

[0026] a partition plate horizontally disposed in the lower portion of the box body and dividing the interior of the box body into an upper cavity and a lower cavity, the water outlet and the slag outlet both being located above the partition plate, and the baffle being located in the upper cavity; when the first rotating rod moves up and down between the first position and the second position, the first rotating rod always passes through the partition plate and is rotationally connected to the partition plate;

[0027] a second rotating rod, which is vertically arranged, with the lower portion of the second rotating rod inserted into the upper portion of the first rotating rod, the upper portion of which is rotatably connected to the top of the box body and rotated under the driving force, and the lower portion of the second rotating rod is provided with a plurality of second guide blocks at intervals along its circumferential direction, the number of the second guide blocks being equal to the number of the second guide grooves and corresponding one to one, and each second guide block being slidably arranged in its corresponding second guide groove;

[0028] Two screws are arranged in the lower cavity and are both vertically arranged and can rotate under the drive of power. The top and bottom of the two screws are respectively rotatably connected to the partition and the bottom of the box body. The two screws are respectively provided with nuts matching them;

[0029] A support plate is arranged in the lower cavity, two nuts are symmetrically arranged on the support plate, and the bottom of the first rotating rod is rotatably connected to the support plate.

[0030] Preferably, in the deep foundation pit drainage structure, a fixed block is fixed on the first rotating rod, and when the first rotating rod is in the first position, the fixed block is placed on the partition, and when the first rotating rod is in the second position, the top of the first rotating rod is in contact with the top of the box, and the fixed block is separated from the partition and the lowest filter plate by a certain distance.

[0031] Preferably, in the deep foundation pit drainage structure, a driven gear is fixed to each of the two screws;

[0032] The driving device has a fixed end fixed to the bottom of the box body, and a driving gear is provided at the driving end, and two driven gears are meshed with the driving gear.

[0033] The utility model has at least the following beneficial effects:

[0034] The utility model can filter impurities in the water flow step by step by arranging the filter plates from top to bottom in sequence and making the filter holes on each filter plate smaller in size from top to bottom. By arranging a push plate above each filter plate and providing an opening on each filter plate, the push plate can push the impurities on the filter plate toward the opening when it rotates, and the impurities are discharged through the channel formed by the opening, the baffle and the slag outlet, so that the filter plates are not easily clogged and the impurities are easily collected.

[0035] The utility model provides a movable plate under each filter plate, and a plurality of push rods are provided on the movable plate. When the first rotating rod moves upward under the driving force of the power, each push rod can pass through the filter hole corresponding thereto, so that impurities blocked in the filter hole can be cleaned, thereby improving the service life of the filter plate.

[0036] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a deep foundation pit drainage structure according to an embodiment of the present utility model;

[0038] Figure 2 It is a structural schematic diagram of a filter plate and a push plate according to an embodiment of the utility model. DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0040] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] like Figure 1 and Figure 2 As shown, the utility model provides a deep foundation pit drainage structure, comprising:

[0042] A drainage ditch is provided at the bottom of the foundation pit and surrounds the foundation pit;

[0043] a plurality of water collection wells arranged at intervals in the drainage ditch;

[0044] Multiple water filtering devices, one water filtering device is provided in a water collection well, and any water filtering device includes:

[0045] The box body 1 is a hollow cylindrical body with a water inlet 101 at the top and a water outlet 102 and a slag outlet 103 at the bottom.

[0046] a drain pipe, which is in communication with the water outlet 102 and connected to a water pump;

[0047] Multiple filter plates 2 are arranged in the box body 1 at intervals along the vertical direction. The filter plates 2 are circular and arranged horizontally. They are fixed to the inner wall of the box body 1 and seamlessly connected. Each filter plate 2 is provided with an opening 201 along its radial direction. Each opening 201 is not opposite to the water inlet 101. The length of the opening 201 should be as close to the radius of the filter plate 2 as possible. The outer end of the opening 201 should be extended to the edge of the filter plate 2 as much as possible so that the opening 201 is long enough. Among any two adjacent filter plates 2, the filter hole on the filter plate 2 located above The size is large, and the projection of the opening 201 on the upper filter plate 2 projected vertically downward on the horizontal plane is within the projection of the opening 201 on the lower filter plate 2 projected vertically downward on the horizontal plane, so that each filter plate 2 can filter impurities step by step, and the impurities on the filter plates 2 can fall downward through each opening 201 under the push of the push plate 4; the heights of the water outlet 102 and the slag outlet 103 are both lower than the height of the lowest filter plate 2, and the opening 201 on the lowest filter plate 2 is connected to the slag outlet 103;

[0048] The first rotating rod 3 is vertically arranged and passes through the middle of each filter plate 2 and is rotatably connected to each filter plate 2. The first rotating rod 3 rotates under the driving force;

[0049] There are multiple push plates 4, the number of which is equal to that of the filter plates 2 and they correspond one to one. Each push plate 4 is respectively arranged above the corresponding filter plate 2 and close to the corresponding filter plate 2. One end of each push plate 4 is fixedly connected to the first rotating rod 3, and the other end extends to the inner wall near the box body 1, so that the push plate 4 can rotate with the first rotating rod 3 and push the impurities on the filter plate 2 to move toward the opening 201.

[0050] The deep foundation pit drainage structure provided by this solution, when in use, the accumulated water in the foundation pit flows into the drainage ditch, then into the water collection well, and into the housing 1 through the water inlet 101. After being filtered step by step by each filter plate 2, the water is discharged through the water outlet 102 and then pumped out by a water pump. When it is necessary to clean the impurities trapped by the filter plates 2, the power is used to drive the first rotating rod 3 to rotate, and the first rotating rod 3 drives the push plate 4 to rotate. The push plate 4 pushes the impurities on the filter plates 2 toward the opening 201, and the impurities are discharged through the opening 201 and the slag outlet 103, making it less likely for the filter plates 2 to be blocked and the impurities easy to discharge.

[0051] In another embodiment, in the deep foundation pit drainage structure, the projections of each push plate 4 projected vertically downward onto the horizontal plane do not overlap, so that when the push plate 4 located above pushes impurities to the corresponding opening 201, they will not fall onto the push plate 4 below.

[0052] In another embodiment, the deep foundation pit drainage structure further comprises:

[0053] The baffle 5 is disposed within the housing 1. The baffle 5 is hollow, with an open top and a closed bottom. The baffle 5 faces the opening 201 on the bottom filter plate 2. The baffle 5 is fixedly connected to the bottom filter plate 2, and the interior of the baffle 5 is in communication with the opening 201 on the bottom filter plate 2 and the slag outlet 103. When the push plate 4 rotates, the impurities on the filter plate 2 are pushed toward the opening 201 and discharged through the channel formed by the opening 201, the baffle 5, and the slag outlet 103.

[0054] In another embodiment, in the deep foundation pit drainage structure, the slag outlet 103 is arranged on the side wall of the box body 1, and the bottom of the baffle 5 gradually slopes downward toward the side wall of the box body 1, so that impurities can be easily discharged through the baffle 5.

[0055] In another embodiment, in the deep foundation pit drainage structure, the first rotating rod 3 is driven by power to move up and down between a first position and a second position, and the height of the second position is higher than that of the first position; when the first rotating rod 3 is in the first position, each push plate 4 is close to its corresponding filter plate 2;

[0056] The deep foundation pit drainage structure also includes:

[0057] A plurality of movable plates 6 are provided, the number of which is equal to that of the filter plates 2 and corresponds one to one. Each movable plate 6 is respectively arranged below the corresponding filter plate 2. The first rotating rod 3 passes through each movable plate 6 and is rotatably connected to each movable plate 6. When the first rotating rod 3 moves up and down between the first position and the second position, the first rotating rod 3 drives each movable plate 6 to move up and down, that is, the movable plate 6 can move up and down with the first rotating rod 3, but cannot rotate with the first rotating rod 3. A plurality of pushing rods 601 and a plurality of water holes are arranged at intervals on each movable plate 6. The pushing rods 601 on each movable plate 6 are respectively equal to the number of filter holes on the filter plate 2 above it and correspond one to one. The size of each water hole is larger than that on the filter plate 2 above it. The size of the filter holes allows the water passing through the filter holes to flow downward through the water holes; when the first rotating rod 3 is in the first position, each push rod 601 is located below the corresponding filter plate 2 and is separated from the corresponding filter plate 2 by a certain distance so that the water passing through the filter holes can flow downward; when the first rotating rod 3 is in the second position, each push rod 601 passes through the corresponding filter hole to push the impurities blocked in the filter hole onto the filter plate 2. Since the push plate 4 also moves upward when the movable plate 6 moves upward, the push plate 4 will not affect the push rod 601 from pushing the impurities in the filter hole upward; a through hole is provided on the movable plate 6 located at the bottom, and the barrier 5 passes through the through hole without interfering with the up and down movement of the movable plate 6 located at the bottom.

[0058] When impurities on the filter plate 2 need to be cleaned, the first rotating rod 3 is placed in the first position. At this time, each push plate 4 is close to its corresponding filter plate 2. Then, power, such as manpower, drives the first rotating rod 3 to rotate, and the first rotating rod 3 drives the push plates 4 to rotate. The push plates 4 push the impurities on the filter plate 2 toward the opening 201 and are finally discharged through the slag outlet 103. When the first rotating rod 3 is driven upward to the second position by power, such as manpower, each push rod 601 can pass through its corresponding filter hole, so that impurities blocking the filter hole can be cleaned, thereby increasing the service life of the filter plate 2.

[0059] In another embodiment, in the deep foundation pit drainage structure, the bottom of the slag outlet 103 is flush with the lowest point of the bottom of the baffle 5, so that impurities can be easily discharged through the baffle 5 and the slag outlet 103. A temporary storage box 11 is provided on one side of the box body 1, and a detachable cover is provided on the top of the temporary storage box 11. By opening the cover, the impurities temporarily stored in the temporary storage box 11 can be cleaned. The slag outlet 103 is connected to the interior of the temporary storage box 11, so that the impurities discharged through the slag outlet 103 can fall into the temporary storage box 11; the projections of the cross sections at various locations on the upper part of the baffle 5 projected vertically downward on the horizontal plane all coincide with the projections of the through hole projected vertically downward on the horizontal plane, so that the upper part of the baffle 5 does not affect the up and down movement of the lowest movable plate 6; when the first rotating rod 3 moves up and down between the first position and the second position, the upper part of the baffle 5 is always located in the through hole, that is, the movable plate 6 located at the bottom moves up and down along the upper part of the baffle 5.

[0060] In another scheme, in the deep foundation pit drainage structure, a plurality of first guide grooves are arranged at intervals on the side walls of the box body 1, and each first guide groove is arranged vertically. A plurality of first guide blocks 602 are arranged at intervals along the circumferential direction at the outer edge of each movable plate 6. The number of first guide blocks 602 on each movable plate 6 is equal to the number of first guide grooves, and corresponds one to one. Each first guide block 602 is slidably arranged in the corresponding first guide groove, and the first guide groove and the first guide block 602 cooperate to enable the movable plate 6 to move only up and down.

[0061] In another embodiment, in the deep foundation pit drainage structure, when the first rotating rod 3 is in the second position, the top of the first rotating rod 3 contacts or is separated from the top of the box body 1 by a certain distance, so that the top of the box body 1 does not restrict the up and down movement of the first rotating rod 3; the interior of the upper portion of the first rotating rod 3 is hollow, and a plurality of second guide grooves are provided at intervals on the inner side wall of the upper portion of the first rotating rod 3, and each second guide groove is provided vertically;

[0062] The deep foundation pit drainage structure also includes:

[0063] a partition 7 horizontally disposed in the lower portion of the housing 1 and dividing the interior of the housing 1 into an upper cavity and a lower cavity; the water outlet 102 and the slag outlet 103 are both located above the partition 7, and the baffle 5 is located in the upper cavity; when the first rotating rod 3 moves up and down between the first position and the second position, the first rotating rod 3 always passes through the partition 7 and is rotationally connected to the partition 7, and the partition 7 does not rotate with the first rotating rod 3;

[0064] The second rotating rod 8 is vertically arranged, and the lower portion of the second rotating rod 8 is inserted into the upper portion of the first rotating rod 3. The upper portion is rotatably connected to the top of the box body 1 and rotates under the driving force. The lower portion of the second rotating rod 8 is provided with a plurality of second guide blocks 801 at intervals along its circumferential direction. The number of the second guide blocks 801 is equal to the number of the second guide grooves and corresponds one to one. Each second guide block 801 is slidably arranged in its corresponding second guide groove. The second guide groove and the second guide block 801 cooperate to enable the first rotating rod 3 to rotate with the second rotating rod 8 and to move up and down relative to the second rotating rod 8;

[0065] Two screw rods 9 are arranged in the lower cavity and are both vertically arranged and can rotate under the drive of power. The top and bottom of the two screw rods 9 are respectively rotatably connected to the partition 7 and the bottom of the box body 1. The two screw rods 9 are respectively provided with nuts matching them;

[0066] The support plate 10 is arranged in the lower cavity, and the two nuts are symmetrically arranged on the support plate 10. The bottom of the first rotating rod 3 is rotatably connected to the support plate 10, and the support plate 10 does not rotate with the first rotating rod 3.

[0067] The power drives the two screw rods 9 to rotate forward and reverse, which can move the two nuts and the support plate 10 up and down, and further move the first rotating rod 3 up and down between the first position and the second position.

[0068] In another embodiment, in the deep foundation pit drainage structure, a fixed block 301 is fixed to the first rotating rod 3. When the first rotating rod 3 is in the first position, the fixed block 301 rests on the partition plate 7. When the first rotating rod 3 is in the second position, the top of the first rotating rod 3 contacts the top of the housing 1, and the fixed block 301 is separated from the baffle 5 and the lowest filter plate 2 by a certain distance. When the first rotating rod 3 is in the first position, the first rotating rod 3 is supported by the fixed block 301 and the support plate 10, and the baffle 5 and the lowest filter plate 2 do not restrict the upward movement of the fixed block 301.

[0069] In another embodiment, in the deep foundation pit drainage structure, a driven gear is fixed to each of the two screw rods 9;

[0070] The drive device, with its fixed end fixed to the bottom of the housing 1, is equipped with a driving gear at the driving end, and two driven gears are meshed with the driving gear. The drive device drives the driving gear to rotate, which in turn causes the two driven gears and two screws 9 to rotate synchronously, allowing the support plate 10 to drive the first rotating rod 3 thereon to move up and down.

Claims

1. Deep foundation pit drainage structure, characterized by: include: A drainage ditch is provided at the bottom of the foundation pit and surrounds the foundation pit; a plurality of water collection wells arranged at intervals in the drainage ditch; Multiple water filtering devices, one water filtering device is provided in a water collection well, and any water filtering device includes: The box body is a hollow cylindrical body with a water inlet at the top and a water outlet and a slag outlet at the bottom; a drain pipe, which is communicated with the water outlet and connected to a water pump; A plurality of filter plates are arranged in the box at intervals along the vertical direction, the filter plates are circular and fixed to the inner side walls of the box and seamlessly connected, each filter plate is provided with an opening along its radial direction, and each opening is not opposite to the water inlet; among any two adjacent filter plates, the filter holes on the filter plate located above are larger in size, and the projection of the opening on the filter plate located above is projected vertically downward on the horizontal plane within the projection of the opening on the filter plate located below; the heights of the water outlet and the slag outlet are both lower than the height of the filter plate located below, and the opening on the filter plate located below is connected to the slag outlet; A first rotating rod is vertically arranged and passes through the middle of each filter plate and is rotatably connected to each filter plate. The first rotating rod rotates under the driving force; There are multiple push plates, the number of which is equal to that of the filter plates and corresponds one to one. Each push plate is respectively arranged above the corresponding filter plate and close to the corresponding filter plate. One end of each push plate is fixedly connected to the first rotating rod, and the other end extends to the inner side wall near the box body.

2. The deep foundation pit drainage structure according to claim 1, characterized in that: The projections of each push plate projected vertically downward onto the horizontal plane do not overlap.

3. The deep foundation pit drainage structure according to claim 1, characterized in that: Also includes: The partition is arranged in the box body, the interior of the partition is hollow, the top is open, the bottom is closed and opposite to the opening on the lowest filter plate, the partition is fixedly connected to the lowest filter plate, and the interior of the partition is connected to the opening on the lowest filter plate and the slag outlet.

4. The deep foundation pit drainage structure according to claim 3, characterized in that: The slag outlet is arranged on the side wall of the box body, and the bottom of the baffle is gradually inclined downward toward the side wall of the box body.

5. The deep foundation pit drainage structure according to claim 4, characterized in that: The first rotating rod moves up and down between a first position and a second position under the driving force, and the height of the second position is higher than the height of the first position; When the first rotating rod is in the first position, each push plate is close to the corresponding filter plate; The deep foundation pit drainage structure also includes:

18. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod having a check valve in said linking rod and said adjusting base is pivotally connected to said linking rod. said linking rod having a check valve in said linking rod and said adjusting base is pivotally connected to said linking rod.

6. The deep foundation pit drainage structure according to claim 5, characterized in that: The bottom of the slag outlet is flush with the lowest point of the bottom of the partition, a temporary storage box is provided on one side of the box body, and a detachable cover is provided on the top of the temporary storage box. The slag outlet is connected to the interior of the temporary storage box; the projections of the cross sections at various locations on the upper part of the partition projected vertically downward on the horizontal plane coincide with the projections of the through hole projected vertically downward on the horizontal plane; when the first rotating rod moves up and down between the first position and the second position, the upper part of the partition is always located in the through hole.

7. The deep foundation pit drainage structure according to claim 5, characterized in that: A plurality of first guide grooves are arranged at intervals on the side walls of the box body, and each first guide groove is arranged vertically. A plurality of first guide blocks are arranged at intervals along the circumferential direction at the outer edge of each movable plate. The number of first guide blocks on each movable plate is equal to the number of first guide grooves and corresponds one to one. Each first guide block is slidably arranged in the corresponding first guide groove.

8. The deep foundation pit drainage structure according to claim 5, characterized in that: When the first rotating rod is in the second position, the top of the first rotating rod is in contact with or separated from the top of the box body by a certain distance; the interior of the upper portion of the first rotating rod is hollow, and a plurality of second guide grooves are provided on the inner side wall of the upper portion of the first rotating rod at intervals, and each second guide groove is provided vertically; The deep foundation pit drainage structure also includes: a partition plate horizontally disposed in the lower portion of the box body and dividing the interior of the box body into an upper cavity and a lower cavity, the water outlet and the slag outlet both being located above the partition plate, and the baffle being located in the upper cavity; when the first rotating rod moves up and down between the first position and the second position, the first rotating rod always passes through the partition plate and is rotationally connected to the partition plate; a second rotating rod, which is vertically arranged, with the lower portion of the second rotating rod inserted into the upper portion of the first rotating rod, the upper portion of which is rotatably connected to the top of the box body and rotated under the driving force, and the lower portion of the second rotating rod is provided with a plurality of second guide blocks at intervals along its circumferential direction, the number of the second guide blocks being equal to the number of the second guide grooves and corresponding one to one, and each second guide block being slidably arranged in its corresponding second guide groove; Two screws are arranged in the lower cavity and are both vertically arranged and can rotate under the drive of power. The top and bottom of the two screws are respectively rotatably connected to the partition and the bottom of the box body. The two screws are respectively provided with nuts matching them; A support plate is arranged in the lower cavity, two nuts are symmetrically arranged on the support plate, and the bottom of the first rotating rod is rotatably connected to the support plate.

9. The deep foundation pit drainage structure according to claim 8, characterized in that: A fixed block is fixed on the first rotating rod. When the first rotating rod is in the first position, the fixed block is placed on the partition. When the first rotating rod is in the second position, the top of the first rotating rod contacts the top of the box body, and the fixed block is separated from the partition and the lowest filter plate by a certain distance.

10. The deep foundation pit drainage structure according to claim 8, characterized in that: A driven gear is fixed on each of the two screws; The driving device has a fixed end fixed to the bottom of the box body, and a driving gear is provided at the driving end, and two driven gears are meshed with the driving gear.

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