High-load two-stage separation treatment structure and secondary sedimentation tank

Abstract

This invention discloses a high-load two-stage separation treatment structure and a secondary sedimentation tank, relating to the field of wastewater treatment technology. The separation treatment structure includes a scraper, with a fixed rod installed at the end of the scraper. A support rod is fixedly connected to the fixed rod, and a mounting frame is hinged to the support rod. A scraper plate is fixedly connected to the mounting frame. A rotating shaft is fixedly connected to the scraper, and the fixed rod is rotatably connected to the rotating shaft. A self-locking unit is provided on the side of the scraper, which is used to cyclically switch between relative fixation and relative rotation between the scraper and the support rod. A flipping unit is also provided on the side of the scraper, which is used to drive the scraper to rotate 180° relative to the support rod. This invention can prevent scum from accumulating on the back surface of the scraper and can also make the scum cleaning more thorough, preventing scum from affecting the quality of the effluent.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a high-load two-stage separation treatment structure and a secondary sedimentation tank. Background Technology

[0002] Secondary sedimentation tanks, also known as secondary settling tanks, are mainly used for sludge-water separation. During the operation of secondary sedimentation tanks, light suspended solids, activated sludge flocs, grease and other impurities in the mixed liquor will rise to the surface of the tank with the water flow and accumulate to form scum. The scum needs to be removed in a timely and effective manner.

[0003] Current methods for cleaning scum mainly involve using a scraper that slowly rotates along the center of the secondary sedimentation tank to push the scum on the surface towards the edge, ultimately scraping it into a scum hopper located at the edge of the tank, and then discharging it out of the tank through a pipe; as per the instruction manual. Figure 1 As shown, the diameter of the radial flow secondary sedimentation tank can reach tens of meters. The sludge scraper a usually rotates synchronously with the sludge scraper bridge and sludge scraper. The drive device has a high load. In order to ensure the smooth operation of the sludge scraper and sludge scraper, the sludge scraper a is always pushed in one direction during operation. The working surface of the sludge scraper is always the water-facing surface b. Due to the obstruction and movement of the sludge scraper, a relatively low-pressure vortex zone or hydraulic dead zone will be formed on the back water surface c of the sludge scraper. The fine scum and light particles that are constantly floating in the pool water are easily drawn in and collected in the accumulation zone d. After the scum accumulates to a certain thickness in the accumulation zone d, the scum is easily diffused with the water flow to the outlet weir area, affecting the quality of the effluent. Summary of the Invention

[0004] The purpose of this invention is to provide a high-load two-stage separation and treatment structure and a secondary sedimentation tank to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-load two-stage separation processing structure, comprising a scraper, a fixed rod installed at the end of the scraper, a support rod fixedly connected to the fixed rod, a mounting frame hinged to the support rod, and a scraper plate fixedly connected to the mounting frame; a rotating shaft fixedly connected to the scraper, and the fixed rod rotatably connected to the rotating shaft; a self-locking unit is provided on the side of the scraper, the self-locking unit being used to cyclically switch between relative fixation and relative rotation of the scraper and the support rod; a flipping unit is also provided on the side of the scraper, the flipping unit being used to drive the scraper to flip 180° relative to the support rod.

[0006] As a further embodiment of the present invention, the self-locking unit includes a limiting block, which is slidably connected to the scraper rod. An elastic element for resetting the limiting block is installed inside the scraper rod. A slot is provided on the fixing rod that can be inserted into the limiting block. When the limiting block is located in the slot, the scraper rod and the fixing rod are relatively fixed. A top rod is fixedly connected to the limiting block. The end of the top rod away from the limiting block passes through the scraper rod and extends to the outside of the scraper rod. A driving block is provided on the outside of the top rod. When the top rod moves along the surface of the driving block, the driving block can drive the top rod to move towards the end of the scraper rod.

[0007] As a further embodiment of the present invention, the elastic element includes a return spring, the two ends of which are fixed to the scraper and the limiting block, respectively.

[0008] As a further embodiment of the present invention, the limiting block is fixedly connected to a stop block.

[0009] As a further embodiment of the present invention, a plurality of scraper blades two arranged at equal intervals are fitted on the scraper rod, and the plurality of scraper blades two are fixedly connected by a connecting plate; the scraper blades two adjacent to the stop block are fixedly connected to the stop block.

[0010] As a further embodiment of the present invention, the flipping unit includes a gear and a rack, the gear being fixedly connected to the scraper and arranged coaxially with the rotating shaft; the rack is disposed on the side of the gear.

[0011] As a further embodiment of the present invention, a roller is rotatably mounted at the bottom end of the support rod.

[0012] A secondary sedimentation tank includes a separation and treatment structure and a tank body. An inlet pipe is installed inside the tank body, and a diversion plate and a baffle plate are coaxially arranged on the outside of the inlet pipe. The diversion plate and the baffle plate are fixedly connected. A sludge scraper is fixedly installed on the baffle plate via a bracket, and the sludge scraper is located at the bottom of the tank body. A motor for driving the diversion plate and the baffle plate to rotate is installed above the tank body. An outlet trough is provided inside the tank body, and a slag baffle plate is provided inside the outlet trough. A slag discharge port is provided on the slag baffle plate, and a drive block and a rack are fixedly installed on the outer wall of the slag discharge port.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This invention utilizes a scraper rod, a fixed rod, a support rod, a self-locking unit, and a flipping unit. During normal operation, the self-locking unit keeps the scraper rod, fixed rod, and support rod relatively fixed, ensuring stable operation of both the scraper rod and the scraper blade. After each rotation of the scraper rod completes one scraping operation, the self-locking unit briefly releases the fixation of the scraper rod and fixed rod, allowing the scraper rod to rotate relative to the fixed rod. Then, the flipping unit drives the scraper rod to rotate 180°. This rotation pushes the scum on the back side of the scraper rod to the front side, preventing scum from accumulating on the back side and ensuring more thorough cleaning, thus preventing scum from affecting the quality of the effluent. After rotating 180°, the self-locking unit again fixes the scraper rod and fixed rod relatively, ensuring that the rotation of the scraper rod drives the support rod to rotate stably. Attached Figure Description

[0015] Figure 1 This is a diagram illustrating the background technology of the present invention;

[0016] Figure 2 This is a schematic diagram of the overall structure of the separation and processing structure of the present invention;

[0017] Figure 3 This is a cross-sectional schematic diagram of the overall structure of the separation and processing structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the driving block structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the working state of the separation and processing structure of the present invention;

[0020] Figure 6 This is a schematic diagram illustrating the working principle of the scraper rod of the present invention;

[0021] Figure 7 This is a schematic diagram of the overall structure of the secondary sedimentation tank of the present invention;

[0022] Figure 8 This is a schematic cross-sectional view of the overall structure of the secondary sedimentation tank of the present invention;

[0023] Figure 9 This is a schematic diagram of the working state of the present invention.

[0024] The attached figures are labeled as follows:

[0025] 1-Scraper bar, 2-Fixing rod, 3-Support rod, 4-Mounting bracket, 5-Scraper blade one, 6-Rotating shaft, 7-Limiting block, 8-Reset spring, 9-Top rod, 10-Drive block, 11-Stop block, 12-Gear, 13-Rack, 14-Scraper blade two, 15-Connecting plate, 16-Roller, 17-Bearing, 18-Slag discharge port, 19-Pool body, 20-Inlet pipe, 21-Diverter plate, 22-Water baffle plate, 23-Motor, 24-Outlet trough, 25-Slag baffle plate, 26-Sludge scraper. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-9 This invention provides a technical solution: a high-load two-stage separation processing structure, including a scraper 1, a fixing rod 2 installed at the end of the scraper 1, a support rod 3 fixedly connected to the fixing rod 2, a mounting frame 4 hinged to the support rod 3, and a scraper 5 fixedly connected to the mounting frame 4; a rotating shaft 6 fixedly connected to the scraper 1, and the fixing rod 2 rotatably connected to the rotating shaft 6; a self-locking unit is provided on the side of the scraper 1, which is used to cyclically switch the scraper 1 and the support rod 3 between relative fixation and relative rotation; a flipping unit is also provided on the side of the scraper 1, which is used to drive the scraper 1 to flip 180° relative to the support rod 3.

[0028] refer to Figure 6 When scraper 1 moves in a circular motion around the center of the secondary sedimentation tank in the v1 direction, scraper 1, in conjunction with scraper 5, pushes the scum on the surface of the secondary sedimentation tank towards the edge of the tank; each rotation of scraper 1 pushes some of the scum into the discharge port 18; during the rotation of scraper 1, when scraper 1 contacts the self-locking unit, the self-locking unit can release the locking of the fixing rod 2 and scraper 1, changing the scraper 1 and fixing rod 2 from a relatively fixed state to a relatively rotating state; then the flipping unit drives scraper 1 to rotate 180° in the v2 direction; as Figure 6 As shown, in the working state, the upper half of scraper 1 is positioned above the liquid surface in the secondary sedimentation tank for pushing scum, while the lower half is positioned below the liquid surface. When scraper 1 rotates 180°, the lower half switches to the upper half, and scraper 1 moves towards... Figure 6When the scraper bar 1 is flipped in the v2 direction, the lower half of the scraper bar 1, located below the liquid surface, can push the scum accumulated at the back water surface c to the front water surface b. Under the action of buoyancy, the scum attached to the back water surface of the scraper bar 1 floats up and stays on the surface of the secondary sedimentation tank. When the scraper bar 1 rotates for the next revolution, it can push the scum towards the discharge port 18. Through the setting of the scraper bar 1, the fixed rod 2, the support rod 3, the self-locking unit and the flipping unit, the scraper bar 1 is kept relatively fixed by the self-locking unit during normal operation, ensuring that the scraper bar 1 and the scraper blade 5 can work stably. After each rotation of rod 1, completing one scraping operation, the self-locking unit briefly releases the fixation between scraper rod 1 and fixed rod 2, allowing scraper rod 1 to rotate relative to fixed rod 2. Then, the flipping unit drives scraper rod 1 to rotate 180°. This rotation pushes the scum on the back side of scraper rod 1 to the front side, preventing scum from accumulating on the back side of scraper rod 1 and ensuring more thorough cleaning, thus preventing scum from affecting the quality of the effluent. After scraper rod 1 rotates 180°, the self-locking unit then fixes scraper rod 1 and fixed rod 2 back to each other, ensuring that the rotation of scraper rod 1 can drive the support rod 3 to rotate stably.

[0029] Specifically, such as Figures 2-5 As shown, the self-locking unit includes a limiting block 7, which is slidably connected to the scraper rod 1. An elastic element for resetting the limiting block 7 is installed inside the scraper rod 1. A slot is provided on the fixing rod 2 that can be inserted into the limiting block 7. When the limiting block 7 is in the slot, the scraper rod 1 and the fixing rod 2 are relatively fixed. A top rod 9 is fixedly connected to the limiting block 7. The end of the top rod 9 away from the limiting block 7 passes through the scraper rod 1 and extends to the outside of the scraper rod 1. A driving block 10 is provided on the outside of the top rod 9. When the top rod 9 moves along the surface of the driving block 10, the driving block 10 can drive the top rod 9 to move towards the end of the scraper rod 1.

[0030] When the limiting block 7 is inserted into the slot on the fixing rod 2, the scraper rod 1 and the fixing rod 2 are relatively fixed, and the scraper rod 1 can stably drive the fixing rod 2, the support rod 3, the mounting bracket 4 and the scraper 5 to rotate; under the drive of the scraper rod 1, such as Figure 4 and Figure 5 As shown, when the push rod 9 enters the slot of the drive block 10 from the right end, the push rod 9 slides along the inner wall of the drive block 10. The drive block 10 drives the push rod 9 to move closer to the scraper rod 1. The push rod 9 drives the limiting block 7 to move synchronously until the limiting block 7 disengages from the slot. At this time, the locking of the scraper rod 1 and the fixing rod 2 is released. Then, the flipping unit can drive the scraper rod 1 to rotate 180°. Then, the push rod 9 continues to move until it disengages from the drive block 10. The elastic element installed inside the scraper rod 1 can drive the limiting block 7 and the push rod 9 to move outward. The limiting block 7 is inserted into the slot again, so that the scraper rod 1 and the fixing rod 2 remain relatively fixed.

[0031] Specifically, such as Figure 3As shown, the elastic element includes a return spring 8, with its two ends fixed to the scraper 1 and the limiting block 7, respectively.

[0032] Specifically, such as Figure 2 As shown, the limiting block 7 is fixedly connected to the stop block 11; the stop block 11 is used to block the sliding groove of the limiting block 7 to prevent scum from affecting the sliding of the limiting block 7.

[0033] Specifically, such as Figure 2 and Figure 5 As shown, a number of scraper blades 14 arranged at equal intervals are mounted on the scraper rod 1. The scraper blades 14 are fixedly connected by the connecting plate 15. The scraper blades 14 adjacent to the stop block 11 are fixedly connected to the stop block 11. The top rod 9 drives the limiting block 7 to move. When the scraper rod 1 is not fixed to the fixing rod 2, the limiting block 7 drives the scraper blades 14 to move synchronously through the stop block 11 and the connecting plate 15. The scraper blades 14 can scrape off a small amount of scum adhering to the surface of the scraper rod 1, which can better prevent scum from accumulating on the surface of the scraper rod 1.

[0034] Specifically, such as Figure 2 , Figure 3 and Figure 5 As shown, the flipping unit includes a gear 12 and a rack 13. The gear 12 is fixedly connected to the scraper 1 and is arranged coaxially with the rotating shaft 6. The rack 13 is located on the side of the gear 12. After the scraper 1 drives the gear 12 to rotate until the gear 12 meshes with the rack 13, the rack 13 can drive the gear 12 and the scraper 1 to rotate synchronously by 180° when the scraper 1 continues to rotate. It should be noted that the rack 13 is located below the middle section of the drive block 10. That is, the gear 12 only meshes with the rack 13 after the drive block 10 drives the limiting block 7 to disengage from the slot. And when the scraper 1 completes the 180° flip and the gear 12 disengages from the rack 13, the push rod 9 disengages from the drive block 10. Then the limiting block 7 can be reinserted into the slot under the elastic force of the return spring 8.

[0035] Specifically, such as Figure 2 As shown, a roller 16 is rotatably mounted at the bottom of the support rod 3; the roller 16 allows the support rod 3 to rotate more smoothly.

[0036] refer to Figures 7-9A secondary sedimentation tank includes a separation treatment structure and a tank body 19. An inlet pipe 20 is installed inside the tank body 19, and a diversion plate 21 and a baffle plate 22 are arranged coaxially with the inlet pipe 20 on the outside of the inlet pipe 20. The diversion plate 21 and the baffle plate 22 are fixedly connected. A sludge scraper 26 is fixedly installed on the baffle plate 22 by a bracket and is located at the bottom of the tank body 19. A motor 23 for driving the diversion plate 21 and the baffle plate 22 to rotate is installed above the tank body 19. An outlet trough 24 is provided inside the tank body 19, and a slag baffle plate 25 is provided inside the outlet trough 24. A slag discharge port 18 is provided on the slag baffle plate 25, and a drive block 10 and a rack 13 are fixedly installed on the outer wall of the slag discharge port 18.

[0037] The scraper 1 is rotatably mounted on the circumferential side wall of the baffle plate 22 via the bearing 17. Sewage enters the tank 19 from the inlet pipe 20 after being decelerated by the diversion plate 21 and the baffle plate 22. After the fixed particles in the sewage settle, the clean water overflows from the outlet trough 24. When the motor 23 is working, it can drive the baffle plate 22, the diversion plate 21, the sludge scraper 26 and the scraper 1 to rotate synchronously. The sludge scraper 26 is used to push the sludge at the bottom of the tank 19 to the sludge discharge port, and the scraper 1 is used to push the scum on the surface of the tank 19 to the scum discharge port.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-load two-stage separation processing structure, comprising a scraper (1), a fixing rod (2) installed at the end of the scraper (1), a support rod (3) fixedly connected to the fixing rod (2), a mounting frame (4) hinged to the support rod (3), and a scraper plate (5) fixedly connected to the mounting frame (4); characterized in that: The scraper (1) is fixedly connected to a rotating shaft (6), and the fixed rod (2) is rotatably connected to the rotating shaft (6); a self-locking unit is provided on the side of the scraper (1), which is used to cyclically switch the scraper (1) and the support rod (3) between relative fixation and relative rotation; a flipping unit is also provided on the side of the scraper (1), which is used to drive the scraper (1) to flip 180° relative to the support rod (3); The self-locking unit includes a limiting block (7), which is slidably connected to the scraper rod (1). An elastic element for resetting the limiting block (7) is installed inside the scraper rod (1). A slot is provided on the fixing rod (2) that can be inserted into the limiting block (7). When the limiting block (7) is in the slot, the scraper rod (1) and the fixing rod (2) are relatively fixed. A top rod (9) is fixedly connected to the limiting block (7). The end of the top rod (9) away from the limiting block (7) passes through the scraper rod (1) and extends to the outside of the scraper rod (1). A driving block (10) is provided on the outside of the top rod (9). When the top rod (9) moves along the surface of the driving block (10), the driving block (10) can drive the top rod (9) to move towards the end of the scraper rod (1).

2. The high-load two-stage separation processing structure according to claim 1, characterized in that: The elastic element includes a return spring (8), the two ends of which are fixed to the scraper (1) and the limiting block (7) respectively.

3. The high-load two-stage separation processing structure according to claim 1, characterized in that: The limiting block (7) is fixedly connected to the stop block (11).

4. The high-load two-stage separation processing structure according to claim 3, characterized in that: The scraper (1) is fitted with a plurality of scraper blades (14) arranged at equal intervals, and the plurality of scraper blades (14) are fixedly connected by a connecting plate (15); the scraper blades (14) adjacent to the stop block (11) are fixedly connected to the stop block (11).

5. The high-load two-stage separation processing structure according to claim 1, characterized in that: The flipping unit includes a gear (12) and a rack (13). The gear (12) is fixedly connected to the scraper (1) and is arranged coaxially with the rotating shaft (6). The rack (13) is located on the side of the gear (12).

6. The high-load two-stage separation processing structure according to claim 5, characterized in that: The bottom end of the support rod (3) is rotatably mounted with a roller (16).

7. A secondary sedimentation tank, comprising the separation and treatment structure of claim 6, characterized in that: It also includes a pool body (19); an inlet pipe (20) is installed inside the pool body (19), and a diversion plate (21) and a baffle plate (22) are arranged coaxially with the inlet pipe (20) on the outside of the inlet pipe (20). The diversion plate (21) and the baffle plate (22) are fixedly connected; a sludge scraper (26) is fixedly installed on the baffle plate (22) by a bracket. The sludge scraper (26) is located at the bottom of the pool body (19); a motor (23) for driving the diversion plate (21) and the baffle plate (22) to rotate is installed above the pool body (19); an outlet trough (24) is provided inside the pool body (19), and a slag baffle plate (25) is provided inside the outlet trough (24); a slag discharge port (18) is provided on the slag baffle plate (25), and the drive block (10) and the rack (13) are fixedly installed on the outer wall of the slag discharge port (18).

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