Sealing structure of grit chamber through seam

Abstract

The present invention discloses a sealing structure for a grit chamber through-slit, wherein a sealing assembly is arranged on the through-slit of the grit chamber, and the sealing assembly includes two groups of sealing plates, each group including a plurality of sealing plates arranged side by side, and a magnetic nail is provided on the sealing plate; a group of magnetic suction assemblies is respectively provided on the bridge frame corresponding to each group of sealing plates, and each group includes a plurality of magnetic suction assemblies, and the magnetic suction block group of the magnetic suction assembly corresponds to the magnetic nail on the sealing plate; when the magnetic suction assembly moves with the bridge frame to above the corresponding sealing plate, the sealing plate is lifted and opened around the hinge assembly under the magnetic coupling action of the magnetic suction block group and the magnetic nail, making way for the passing component to pass through. The sealing plate of the present invention has higher mechanical strength and stability, high sealing reliability, and the passing component does not contact the sealing plate when passing through, thereby ensuring the long-term stable movement of the sealing plate, extending the service life of the sealing plate, reducing the maintenance and replacement frequency of the sealing plate, and reducing maintenance costs.

Description

Technical Field

[0001] The invention relates to the technical field of grit chamber sealing, in particular to a sealing structure for a grit chamber through-slit. Background Art

[0002] Grit chambers are a common pretreatment process in wastewater treatment plants. They operate based on gravity separation. Controlling the influent flow rate allows heavier inorganic particles to sink, while organic suspended particles are carried away by the current. Commonly used grit chambers include horizontal flow, aeration, cyclone, and Dole.

[0003] Grit chambers require regular removal of pollutants deposited at the bottom of the chamber. Horizontal grit chambers typically use bridge-type sand suction machines to remove pollutants from the chamber. During operation, the sand suction pipe, scraping device, sand discharge pipe, and other working components of the equipment need to circulate back and forth in a direction perpendicular to the chamber. Therefore, in addition to the open civil engineering structure, the grit chamber also requires a through-slit for the working components to pass through. The gap of the through-slit is usually 300-500mm. To prevent the odor of sewage from escaping through the through-slit, a sealing structure needs to be installed on the through-slit to block it. This will keep the odor within the chamber and allow it to be deodorized by a deodorizing fan before being discharged, ensuring that the on-site environment meets environmental protection requirements.

[0004] Chinese utility model patent CN205639622U discloses a sealing device for an aerated grit chamber. A first flexible membrane and a second flexible membrane are respectively disposed on either side of a reciprocating track of a sand suction pipe. A first magnet is connected to the first flexible membrane, and a second magnet is connected to the second flexible membrane. The first and second magnets, under the action of magnetic attraction, approach each other and drive the first and second flexible membranes to move. The first and second flexible membranes engage with each other under the drive of the first and second magnets. A third magnet is disposed on the sand suction pipe at a location in contact with the first and second magnets. The third magnet includes a first magnetic pole portion and a second magnetic pole portion, wherein the first magnetic pole portion is adjacent to the first magnet and has the same polarity as the first magnet, and the second magnetic pole portion is adjacent to the second magnet and has the same polarity as the second magnet. The third magnet on the sand suction pipe repels and separates the first and second flexible membranes on either side, reducing the suction force between the sand suction pipe and the first and second flexible membranes, thereby facilitating the back-and-forth movement of the sand suction pipe between the first and second flexible membranes. The sealing device of this sand settling tank adopts flexible membrane joint to achieve the sealing of the through seam. This sealing structure has the following disadvantages: (1) The flexible membrane is a flexible part and is easy to age and deform, which affects the sealing performance. In addition, the stability of the flexible membrane is insufficient and there is a risk of collapse, which affects the sealing performance. In order to ensure the stable physical properties of the flexible membrane, there are specific requirements for the material, surface coating material and UV curing treatment of the flexible membrane. The manufacturing process has high requirements. The manufacturing process is complicated and difficult, and the manufacturing cost is high. (2) The two flexible membranes are opened by squeezing the sand suction pipe. That is, when the two flexible membranes are opened, friction will be generated between the sand suction pipe. Even if a lubricating layer is provided on the surface of the sand suction pipe, the friction between the sand suction pipe and the flexible membrane cannot be avoided. The pushing action of the sand suction pipe may cause damage to the flexible membrane, and the repeated friction between the sand suction pipe and the flexible membrane will also accelerate the damage of the flexible membrane. The flexible membrane has a short service life and needs to be maintained and replaced frequently, which has a high maintenance cost. (3) The two flexible membranes are combined by attracting each other through magnets set on their butt joint edges. In order to ensure the reliability of the seal, the butt joint edges of the two flexible membranes need to be covered with magnets, and the magnets are arranged side by side. Many magnet parts are required, and the assembly of magnet parts is also cumbersome. The cost of magnet parts and assembly costs are high. Summary of the Invention

[0005] In response to the shortcomings of the sealing devices of the above-mentioned existing grit chambers, the applicant provides a sealing structure for a grit chamber through-slit with a rational structure, which adopts a rigid sealing plate for sealing, and is simple to manufacture, has low difficulty and low manufacturing cost; the sealing plate is opened by magnetic coupling to prevent the passing components from contacting the sealing plate, thereby extending the service life of the sealing plate and reducing maintenance costs; each sealing plate only needs to be equipped with a magnetic nail and a magnetic suction assembly to realize the magnetic coupling effect to open the sealing plate, thereby reducing the use of magnetic components and reducing the cost of magnetic components and assembly costs.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] A sealing structure for a grit chamber through-slit, wherein a sealing assembly is disposed on the through-slit of the grit chamber, the sealing assembly comprising two sets of sealing plates, each set comprising a plurality of sealing plates arranged side by side; one end of the sealing plate extends outwards to cover the through-slit, and the other end is connected to the grit chamber via a hinge assembly, and a magnetic pin is disposed on the sealing plate; when the sealing plate is in a sealing position, the opposing inner sides of the two sets of sealing plates engage; when the sealing plate is in an open position, the sealing plate is lifted upward around the hinge assembly;

[0008] A group of magnetic components is respectively arranged on the bridge frame corresponding to each group of sealing plates, and each group includes several magnetic components, and the magnetic block group of the magnetic component corresponds to the magnetic nails on the sealing plate; when the magnetic component moves with the bridge frame to above the corresponding sealing plate, the sealing plate is lifted up and opened around the hinge assembly under the magnetic coupling action of the magnetic block group and the magnetic nail, making way for the passing component; the horizontal projection area of the open area of the sealing plate covers the horizontal projection area of the passing component.

[0009] As a further improvement of the above technical solution:

[0010] Each group of magnetic components is provided with at least one magnetic block group on the front and rear sides of the passing component along the running direction; the length of the magnetic coupling area between each group of magnetic components and the magnetic nail covers the passing length of the passing component in the running direction.

[0011] The sealing plates are made of stainless steel. When in the open position, the horizontal width W1 of the corresponding parts of the sealing plates on both sides is greater than the horizontal width W0 of the passing component.

[0012] The magnetic block group of the magnetic attraction assembly is obliquely arranged at the bottom of the connecting assembly, on the side where the magnetic nail is away from the through-slit, and the connecting assembly extends vertically downward and is arranged on the bridge frame; the magnetic block group includes several stacked magnetic blocks; the magnetic block group uses an electromagnet or a permanent magnet; there is a distance between the bottom end of the magnetic attraction assembly and the sealing assembly.

[0013] A limit block is provided on the magnetic assembly, which is located obliquely above the magnetic block group and on the side close to the through-slit; the limit block is a conical block with a larger upper portion and a smaller lower portion; an adjusting component is also provided on the magnetic assembly.

[0014] The magnetic nail is arranged on one end of the sealing plate close to the hinge assembly and on the side of the hinge assembly close to the through-slit; a plurality of reinforcing ribs are arranged on the sealing plate; and the sealing plate is lifted upward at an angle of 45-90 degrees.

[0015] A shuttle push assembly is provided on the bridge frame, and a part of the shuttle push wheel of the shuttle push assembly extends into the through slot and a part extends upward from the through slot, and the upward extension height of the shuttle push wheel is higher than the height of the sealing position of the sealing plate; the left and right horizontal widths of the shuttle push assembly are smaller than the horizontal width of the through slot and larger than the left and right horizontal widths of the through component, and the left and right horizontal widths of the shuttle push assembly are smaller than the horizontal width W1 of the corresponding parts of the sealing plates on both sides when in the open position.

[0016] The shuttle push assembly is provided with a shuttle push wheel on the front and rear sides of the passing component along the running direction; the length of the magnetic coupling area between each set of magnetic suction components and the magnetic nails completely covers the passing length of the shuttle push wheels on the front and rear sides; the two sides of the shuttle push wheel facing the sealing plate are provided with conical surfaces with a small outer side and a large inner side; when the shuttle push wheel opens the sealing plate, the shuttle push position is between the sealing position and the opening position, and the opening of the shuttle push position is less than or equal to the opening of the opening position; when in the shuttle push position, the horizontal width W2 of the corresponding parts of the sealing plates on both sides is greater than the horizontal width W0 of the passing component.

[0017] The hinge assembly of the sealing assembly is connected to the adjusting bracket, the adjusting bracket is fixed to the sand settling tank through the fixing assembly, and the adjusting bracket is covered with a cover plate; the hinge assembly includes a fixing seat, a hinge stator and a hinge movable piece, the fixing seat is fixedly connected to the adjusting bracket, the hinge stator is fixedly connected to the fixing seat, the hinge movable piece is hinged to the hinge stator through a pin shaft, and the sealing plate is fixed on the hinge movable piece.

[0018] A first damping block and a second damping block are provided on the hinge stator of the hinge assembly. The first damping block positions the hinge movable piece when it is in the sealed position, and the second damping block positions the hinge movable piece when it is in the open position. The fixing seat is made of stainless steel, the hinge stator and the hinge movable piece are made of plastic, and the first damping block and the second damping block are made of rubber.

[0019] The beneficial effects of the present invention are as follows:

[0020] The sealing plate of the present invention is made of stainless steel plate, which has high mechanical strength and corrosion resistance. It can be installed and used after being processed into the specified size as required, and does not require additional coating or curing process. It is simple to manufacture, has low difficulty and low manufacturing cost. Moreover, the stainless steel plate is a rigid structural plate. Compared with the flexible parts of the prior art, it has higher mechanical strength and stability, is not easy to deform, and does not have the risk of collapse, and has high sealing reliability. The passing component does not contact the sealing plate when passing through, which avoids mechanical wear of the sealing plate due to contact friction, ensures the long-term stable movement of the sealing plate, extends the service life of the sealing plate, reduces the maintenance and replacement frequency of the sealing plate, and reduces maintenance costs.

[0021] The sealing plate of the present invention is opened under the magnetic coupling of the magnetic attraction component and the magnetic pin. Only one magnetic pin needs to be provided on each sealing plate as a magnetic element to generate magnetic coupling with the magnetic attraction component to open the sealing plate, thereby reducing the use of magnetic elements and reducing the cost of magnetic elements and assembly costs.

[0022] The magnetic attraction assembly of the present invention is provided with a limit block, which can limit the sealing plate and prevent the sealing plate from being lifted too far, thereby facilitating the sealing plate to be reset under the action of gravity.

[0023] The magnetic pin is positioned near one end of the hinge assembly, on the inner side of the hinge assembly, facilitating the sealing plate's rotation and lifting around the hinge assembly under the influence of strong magnetic attraction. The upward lifting angle of the sealing plate is 45-90°, ensuring sufficient opening while facilitating its downward return to the slot under its own weight after the magnetism is dissipated.

[0024] The present invention provides a shuttle push assembly as a safety structure. When the magnetic attraction of the magnetic attraction assembly fails, the shuttle push assembly can push the sealing plate away to make room for the passing component to pass normally, thereby preventing the passing component from squeezing the sealing plate and causing damage to the sealing plate or the passing component.

[0025] The hinge stator and hinge movable piece of the hinge assembly of the present invention are made of plastic material, which has a damping effect, is more conducive to positioning, and is also easier to reset after the hinge movable piece rotates. A damping block made of rubber material is provided on the hinge stator to position the hinge movable piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0027] Figure 2 for Figure 1 Cross-sectional view of section AA.

[0028] Figure 3 Schematic diagram of the structure of the hinge assembly.

[0029] Figure 4 This is the front view of the hinge stator.

[0030] Figure 5 This is a top view of the hinge stator.

[0031] Figure 6 This is the main view of the hinge movable piece.

[0032] Figure 7 This is the left view of the hinge movable piece.

[0033] In the figure: 1, grit chamber; 11, through slot; 2, sealing assembly; 21, sealing plate; 210, sealing position; 211, opening position; 212, shuttle push position; 213, reinforcing rib; 22, magnetic nail; 23, hinge assembly; 231, fixing seat; 232, hinge stator; 2321, stator connecting portion; 2322, stator hinge portion; 2323, first damping block; 2324, second damping block; 233, Hinge movable piece; 2331, movable piece connecting part; 2332, movable piece hinge part; 2333, groove; 234, pin shaft; 235, elastic pin; 24, adjustment bracket; 25, fixing assembly; 26, cover plate; 3, bridge; 4, magnetic assembly; 41, connecting assembly; 42, magnetic block group; 43, limit block; 5, shuttle push assembly; 51, shuttle push wheel; 511, cone surface; 52, fixing frame; 6, passing part. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0035] like Figure 1 、 Figure 2 As shown, the present invention includes a sealing assembly 2 arranged on a through-slit 11 of a sand settling tank 1, a magnetic suction assembly 4 and a shuttle push assembly 5 arranged on a bridge frame 3 of a bridge-type sand suction machine; when removing pollutants from the tank body, the through-component 6 of the bridge-type sand suction machine extends from the center of the through-slit 11 and moves back and forth along the through-slit 11 to suck sand.

[0036] The sealing assembly 2 comprises two symmetrically arranged sets of sealing plates 21, which are positioned to cover the passage slit 11. Each set of sealing plates 21 comprises several sealing plates 21 arranged side by side, each equipped with a magnetic pin 22. One end of each sealing plate 21 extends over the passage slit 11, while the other end is connected to an adjustable bracket 24 via a hinge assembly 23. The adjustable bracket 24 is secured to the grit chamber 1 via a fixing assembly 25. For passage slits 11 of varying widths, the position of the adjustable bracket 24 can be adjusted to adjust the sealing area of the sealing plates 21, ensuring that the two sets of sealing plates 21 meet to form an effective seal. A cover plate 26 is placed on the adjustable bracket 24, enhancing the overall appearance of the equipment. When the sealing plates 21 are in the sealing position 210, they are horizontal, with the opposing inner edges of the two sets of sealing plates 21 joined. When the sealing plates 21 are in the open position 211, they are lifted upward around the hinge assembly 23, clearing space for the passage component 6. When in the open position 211, the horizontal width W1 of the corresponding parts of the sealing plates 21 on both sides is greater than the horizontal width W0 of the passing part 6, which prevents the passing part 6 from contacting the sealing plate 21 when passing through. The sealing plate 21 is made of stainless steel plate, which has high mechanical strength and corrosion resistance. It can be installed and used after being processed into the specified size as required. No additional coating or curing process is required. It is simple to make, with low difficulty and low production cost. Moreover, the stainless steel plate is a rigid structural plate. Compared with the flexible parts of the prior art, it has higher mechanical strength and stability, is not easy to deform, and does not have the risk of collapse, and has high sealing reliability. After the sealing plates 21 on both sides are opened, the width of the channel left is greater than the width of the passing part 6, which prevents the passing part 6 from contacting the sealing plate 21 when passing through, avoids mechanical wear of the sealing plate 21 due to contact friction, ensures the long-term stable movement of the sealing plate 21, extends the service life of the sealing plate 21, reduces the maintenance and replacement frequency of the sealing plate 21, and reduces maintenance costs. The sealing plate 21 can be lifted horizontally upward about the hinge assembly 23 to an angle of 45-90 degrees, ensuring that the sealing plate 21 is sufficiently open while also facilitating its downward return to restoring over the passage slit 11 under its own weight after the magnetism is lost. Several reinforcing ribs 213 are provided on the sealing plate 21 to increase its strength, stability, and reliability.

[0037] The magnetic pin 22 on each sealing plate 21 is positioned near one end of the hinge assembly 23, on the side of the hinge assembly 23 closest to the passage slit 11. This facilitates magnetic coupling between the magnetic pin 22 and the magnetic attraction assembly 4, allowing the sealing plate 21 to rotate and lift around the hinge assembly 23 under the action of strong magnetic attraction. Only one magnetic pin 22 is required on each sealing plate 21 to function as a magnetic element and magnetically couple with the magnetic attraction assembly 4 to open the sealing plate 21, reducing the use of magnetic components, and lowering both the cost of magnetic components and assembly costs.

[0038] As Figure 3 shown, the hinge assembly 23 includes a fixed seat 231, a fixed hinge plate 232 and a movable hinge plate 233. The fixed seat 231 is fixedly connected to the adjusting bracket 24. The fixed hinge plate 232 is fixedly connected to the fixed seat 231. The movable hinge plate 233 is hinged to the fixed hinge plate 232 through a pin shaft 234. After the pin shaft 234 passes through the fixed hinge plate 232 and the movable hinge plate 233, it is positioned by an R-shaped elastic pin 235. The sealing plate 21 is fixed on the movable hinge plate 233 and can rotate with the movable hinge plate 233. The fixed seat 231 is made of stainless steel to ensure sufficient strength and corrosion resistance. The fixed hinge plate 232 and the movable hinge plate 233 are made of plastic, with a damping feeling, which is more conducive to positioning, and it is also more convenient for the movable hinge plate 233 to reset after rotation.

[0039] As Figure 4 、 Figure 5 shown, the fixed hinge plate 232 is a T-shaped block, including a fixed plate connecting portion 2321 and a fixed plate hinged portion 2322. The fixed plate hinged portion 2322 vertically extends from the middle of the fixed plate connecting portion 2321. The fixed plate connecting portion 2321 is connected to the fixed seat 231 through a fastener. On the side of the fixed plate connecting portion 2321 facing the movable hinge plate 233, first damping blocks 2323 are respectively arranged on both sides of the fixed plate hinged portion 2322. When the sealing plate 21 is in the sealing position 210, the first damping blocks 2323 abut against the movable hinge plate 233 for positioning. On the side of the fixed plate hinged portion 2322 facing the movable hinge plate 233, a second damping block 2324 is arranged. When the sealing plate 21 is in the open position 211, the second damping blocks 2324 abut against the movable hinge plate 233 for positioning. The first damping blocks 2323 and the second damping blocks 2324 are made of rubber, which is more convenient for positioning and resetting.

[0040] As Figure 6 、 Figure 7 shown, the movable hinge plate 233 is an approximately "π"-shaped block, including a movable plate connecting portion 2331 and two movable plate hinged portions 2332. The two movable plate hinged portions 2332 vertically extend from the middle of the movable plate connecting portion 2331. A groove 2333 for inserting the fixed plate hinged portion 2322 is formed between the two movable plate hinged portions 2332. The sealing plate 21 is connected to the movable plate connecting portion 2331 through a fastener. After the fixed plate hinged portion 2322 is inserted into the groove 2333, it is hinged to the movable plate hinged portion 2332 through the pin shaft 234.

[0041] As Figure 1As shown, a group of magnetic components 4 is respectively provided on the left and right sides of the bridge 3, corresponding to the magnetic pins 22 on the two groups of sealing plates 21, and the two groups of magnetic components 4 are symmetrically arranged. The two groups of magnetic components 4 are arranged above the sealing component 2 and can move back and forth with the bridge 3. There is a certain distance between the bottom end of the magnetic component 4 and the sealing component 2 to prevent the magnetic component 4 from scratching the sealing component 2 when moving with the bridge 3. Each magnetic component 4 includes a connecting component 41, a magnetic block group 42 and a limit block 43. The connecting component 41 extends vertically downward and is arranged on the bridge 3. The magnetic block group 42 is arranged at the bottom of the connecting component 41, and the limit block 43 is arranged in the middle of the connecting component 41. The magnetic block group 42 is arranged obliquely at the bottom of the connecting component 41, on the side of the magnetic pin 22 away from the through-slit 11, which is conducive to the magnetic coupling between the magnetic block group 42 and the magnetic pin 22 to pull the sealing plate 21 outward. The magnetic block groups 42 comprise several stacked magnetic blocks. Depending on the actual distance between the magnetic assembly 4 and the magnetic pin 22, an appropriate number of magnetic blocks can be stacked to achieve an appropriate distance between the magnetic block groups 42 and the magnetic pin 22. This ensures magnetic coupling strength while preventing interference with the lifting of the sealing plate 21, ensuring smooth lifting of the sealing plate 21. Each group includes several magnetic assemblies 4, with the length of the magnetic coupling area of each group covering the length of the passage member 6 in the travel direction. At least one magnetic block group 42 is positioned on each of the front and rear sides of the passage member 6 in the travel direction. This ensures that, under magnetic coupling, the horizontal projection of the open area of the sealing plate 21 completely covers the horizontal projection of the passage member 6, ensuring that the sealing plate 21 remains open when the passage member 6 passes through, without contacting the sealing plate 21. The magnetic assembly 4 is also equipped with an adjustment component (not shown) that adjusts the positional relationship between the magnetic assembly 4 and the sealing assembly 2, ensuring an optimal magnetic coupling distance between the magnetic block groups 42 and the magnetic pin 22. The magnetic block assembly 42 can be an electromagnet or a permanent magnet. Using a permanent magnet eliminates the risk of demagnetization or loss of magnetism due to power outage, thus providing greater safety. A stopper 43 is positioned obliquely above the magnetic block assembly 42, near the through-slit 11. The stopper 43 is a tapered block with a larger top and smaller bottom. The stopper 43 can limit the sealing plate 21, preventing it from lifting too far and facilitating its return to its original position under the action of gravity.

[0042] like Figure 1As shown, the shuttle push assembly 5 serves as a safety feature, positioned in the center of the bridge 3. If the magnetic assembly 4 fails, it can push open the sealing plate 21, ensuring the normal passage of the passage member 6, thus providing a safety feature. The lower portion of the shuttle push assembly 5 extends into the passage slot 11. The left-right horizontal width of the shuttle push assembly 5 is smaller than the horizontal width of the passage slot 11, but larger than the left-right horizontal width of the passage member 6. The left-right horizontal width of the shuttle push assembly 5 is also smaller than the horizontal width W1 of the corresponding portions of the sealing plates 21 on either side when in the open position 211, preventing the shuttle push assembly 5 from contacting the sealing plates 21 during passage. The shuttle push assembly 5 includes a shuttle push wheel 51 and a mounting bracket 52. The mounting bracket 52 extends vertically downward and is mounted on the bridge 3. The shuttle push wheel 51 is connected to the bottom of the mounting bracket 52 via an axis and is rotatable about its axis. A portion of the shuttle push wheel 51 extends into the passage slot 11, while a portion extends upward from the passage slot 11. The height of the upward extension of the shuttle push wheel 51 is higher than the height of the sealing position 210 of the sealing plate 21. When the magnetic attraction of the magnetic attraction assembly 4 fails and the sealing plate 21 is not attracted, the shuttle push wheel 51 of the shuttle push assembly 5 can push the sealing plate 21 away, making space for the passage, allowing the passage component 6 to pass normally, and preventing the passage component 6 from squeezing the sealing plate 21 and causing damage to the sealing plate 21 or the passage component 6. The shuttle push wheel 51 has tapered surfaces 511 with a smaller outer edge and a larger inner edge on both sides facing the sealing plate 21. When the sealing plate 21 is pushed away, the outer edge of the sealing plate 21 slides upward along the tapered surfaces 511 of the shuttle push wheel 51, thereby lifting the sealing plate 21 upward around the hinge assembly 23. When the sealing plate 21 is restored, its outer edge can also slide upward along the tapered surfaces 511, reducing friction. When the sealing plate 21 is opened by the shuttle push wheel 51, the shuttle push position 212 is between the sealing position 210 and the open position 211. The opening of the shuttle push position 212 is less than or equal to the opening of the open position 211. When the sealing plate 21 is in the shuttle push position 212, the horizontal width W2 of the corresponding part of the sealing plate 21 on both sides is also greater than the horizontal width W0 of the through component 6 to ensure that the through component 6 can pass smoothly. Figure 2 As shown, the shuttle push assembly 5 is provided with a shuttle push wheel 51 on both sides of the front and rear sides of the through component 6 along the running direction. The shuttle push wheels 51 on both sides can push open the sealing plates 21 on the front and rear sides of the through component 6, preventing the through component 6 from squeezing the sealing plate 21 on the front side of its running direction, and also preventing the through component 6 from scratching the sealing plate 21 on the rear side of its running direction. The shuttle push wheels 51 are made of stainless steel to ensure sufficient strength and corrosion resistance. Furthermore, the length of the magnetic coupling area of each group of magnetic components 4 and the magnetic nails 22 is completely covered to the passing length of the shuttle push wheels 51 on the front and rear sides, and there is a certain margin. Then, when the magnetic component 4 is effective and working normally, the horizontal projection area of the open area of the sealing plate 21 can completely cover the horizontal projection area of the shuttle push assembly 5. The shuttle push assembly 5 does not touch the sealing plate 21 when running with the bridge frame 3, ensuring the long-term stable operation of the sealing plate 21.

[0043] In actual use, when the bridge-type sand suction machine is not in operation, the sealing plate 21 is closed, sealing the passage slit 11 and preventing the escape of sewage odor. When the bridge-type sand suction machine is in operation, the bridge frame 3 drives the passage component 6, the magnetic assembly 4, and the shuttle push assembly 5 forward. The magnetic assemblies 4 on both sides attract the magnetic pins 22 on the corresponding sealing plates 21. Under the strong magnetic attraction, the corresponding sealing plates 21 on both sides are pulled upward and rotated around the hinge assembly 22 to open, making way for the passage component 6 and the shuttle push assembly 5. After the passage component 6 and the shuttle push assembly 5 pass through, the magnetic assembly 4 also moves forward with the bridge frame 3, and the attraction of the magnetic assembly 4 on the magnetic pin 23 is weakened. The sealing plates 21 then return downward under the action of their own weight, reclosing the passage slit 11. This cycle repeats until the sand suction operation is completed. When the bridge-type sand suction machine is in operation, only the sealing plates 21 around the passage area of the passage component 6 are opened; the sealing plates 21 in other areas are closed.

[0044] The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without violating the spirit of the present invention.

Claims

1. A sealing structure for a grit chamber through-slit, wherein a sealing assembly (2) is arranged on a through-slit (11) of a grit chamber (1), and is characterized in that: The sealing assembly (2) includes two groups of sealing plates (21), each group including a plurality of sealing plates (21) arranged side by side; one end of the sealing plate (21) extends out of the cover and is arranged on the through-slit (11), and the other end is connected to the grit chamber (1) through the hinge assembly (23); a magnetic nail (22) is provided on the sealing plate (21); when the sealing plate (21) is in the sealing position (210), the opposite inner sides of the two groups of sealing plates (21) are engaged; when the sealing plate (21) is in the open position (211), the sealing plate (21) is lifted upward around the hinge assembly (23); the sealing assembly (2) The hinge assembly (23) is connected to the adjustment bracket (24), the adjustment bracket (24) is fixed to the grit chamber (1) through the fixing assembly (25), the hinge assembly (23) includes a fixing seat (231), a hinge fixed plate (232) and a hinge movable plate (233), the fixing seat (231) is fixedly connected to the adjustment bracket (24), the hinge fixed plate (232) is fixedly connected to the fixing seat (231), the hinge movable plate (233) is hinged to the hinge fixed plate (232) through a pin (234), and the sealing plate (21) is fixed to the hinge movable plate (233); A group of magnetic components (4) is respectively arranged on the bridge (3) and corresponding to each group of sealing plates (21), each group includes a plurality of magnetic components (4), the magnetic block group (42) of the magnetic component (4) corresponds to the magnetic nail (22) on the sealing plate (21), and each group of magnetic components (4) is respectively provided with at least one magnetic block group (42) on the front and rear sides of the passing component (6) along the running direction; when the magnetic component (4) moves with the bridge (3) to the top of the corresponding sealing plate (21), the sealing plate (21) is lifted up and opened around the hinge component (23) under the magnetic coupling action of the magnetic block group (42) and the magnetic nail (22), so as to make a passing space for the passing component (6); the horizontal projection area of the open area of the sealing plate (21) covers the horizontal projection area of the passing component (6).

2. The sealing structure for the grit chamber through-slit according to claim 1, characterized in that: The length of the magnetic coupling region between each set of magnetic attraction components (4) and the magnetic nails (22) covers the passing length of the passing component (6) in the running direction.

3. The sealing structure for the grit chamber passage according to claim 1, characterized in that: The sealing plate (21) is a stainless steel plate; when in the open position (211), the horizontal width W1 of the corresponding parts of the sealing plates (21) on both sides is greater than the horizontal width W0 of the passing component (6).

4. The sealing structure for the grit chamber passage according to claim 1, characterized in that: The magnetic block group (42) of the magnetic assembly (4) is obliquely arranged at the bottom of the connecting assembly (41) and located on the side of the magnetic nail (22) away from the through-slit (11), and the connecting assembly (41) extends vertically downward and is arranged on the bridge (3); the magnetic block group (42) includes a plurality of stacked magnetic blocks; the magnetic block group (42) adopts an electromagnet or a permanent magnet; and there is a gap between the bottom end of the magnetic assembly (4) and the sealing assembly (2).

5. The sealing structure for the grit chamber through-slit according to claim 1, characterized in that: A limit block (43) is provided on the magnetic attraction assembly (4), and the limit block (43) is provided obliquely above the magnetic attraction block group (42) and on a side close to the through-slit (11); the limit block (43) is a conical block with a larger upper portion and a smaller lower portion; an adjustment component is also provided on the magnetic attraction assembly (4).

6. The sealing structure for the grit chamber through-slit according to claim 1, characterized in that: The magnetic nail (22) is arranged on one end of the sealing plate (21) close to the hinge assembly (23) and on one side of the hinge assembly (23) close to the through-slit (11); a plurality of reinforcing ribs (213) are arranged on the sealing plate (21); and the sealing plate (21) is lifted upward at an angle of 45-90 degrees.

7. The sealing structure for the grit chamber through-slit according to claim 1, characterized in that: A shuttle push assembly (5) is provided on the bridge frame (3); a shuttle push wheel (51) of the shuttle push assembly (5) partially extends into the through slot (11) and partially extends upward from the through slot (11); the height of the shuttle push wheel (51) extending upward is higher than the height of the sealing position (210) of the sealing plate (21); the left and right horizontal widths of the shuttle push assembly (5) are smaller than the horizontal width of the through slot (11) and larger than the left and right horizontal widths of the through component (6); and the left and right horizontal widths of the shuttle push assembly (5) are smaller than the horizontal width W1 of the corresponding parts of the sealing plates (21) on both sides when in the open position (211).

8. The sealing structure for the grit chamber passage according to claim 7, characterized in that: The shuttle push assembly (5) is provided with a shuttle push wheel (51) on both sides of the front and rear sides of the passing component (6) along the running direction; the length of the magnetic coupling area between each group of magnetic suction components (4) and the magnetic nail (22) completely covers the passing length of the shuttle push wheels (51) on both sides; the two sides of the shuttle push wheel (51) facing the sealing plate (21) are provided with conical surfaces (511) with a small outer surface and a large inner surface; when the shuttle push wheel (51) opens the sealing plate (21), the shuttle push position (212) is between the sealing position (210) and the opening position (211), and the opening of the shuttle push position (212) is less than or equal to the opening of the opening position (211); when in the shuttle push position (212), the horizontal width W2 of the corresponding parts of the sealing plates (21) on both sides is greater than the horizontal width W0 of the passing component (6).

9. The sealing structure for the grit chamber through-slit according to claim 1, characterized in that: The upper cover of the adjustment bracket (24) is provided with a cover plate (26).

10. The sealing structure for the grit chamber passage according to claim 1, characterized in that: A first damping block (2323) and a second damping block (2324) are provided on the hinge stator (232) of the hinge assembly (23); the first damping block (2323) positions the hinge movable plate (233) when in the sealing position (210); and the second damping block (2324) positions the hinge movable plate (233) when in the open position (211); the fixing seat (231) is made of stainless steel, the hinge stator (232) and the hinge movable plate (233) are made of plastic, and the first damping block (2323) and the second damping block (2324) are made of rubber.

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