A reaction tank for sewage treatment

Abstract

The present application relates to the field of sewage treatment, specifically to a reaction tank for sewage treatment, which comprises a sedimentation tank, a transmission chain, a fixed frame and a scraper assembly, the transmission chain is arranged in the sedimentation tank, the transmission chain is driven clockwise along a preset track, the fixed frame is arranged on the transmission chain in a spaced manner, and the scraper assembly is arranged on the fixed frame, the present application is provided with a transmission chain, a fixed frame, a movable scraper, a flexible movable plate and a sensing rod, during the movement of the movable scraper from the left side of the sedimentation tank to the upper part of the sedimentation tank, the flexible movable plate can slide relative to the mud scraping side of the movable scraper, so as to scrape off the mud on the side of the movable scraper, avoid excessive mud adhering to the side of the movable scraper, reduce the mud scraping efficiency of the movable scraper, and also avoid the increase of the transmission operation load of the transmission chain.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a reaction tank for wastewater treatment. Background Technology

[0002] A wastewater treatment reaction tank is a water purification facility used to remove sediment and floating matter from wastewater. When setting up a wastewater treatment reaction tank, a pit of suitable size is typically excavated first. Then, reinforced concrete is poured around the perimeter and bottom of the pit to form a rigid support structure. Finally, appropriate sludge scraping and floating matter cleaning components are installed to remove sludge and floating matter from the wastewater surface.

[0003] The existing Chinese invention patent with authorization announcement number CN116173567B discloses a sludge scraping device suitable for automatic adjustment in sewage treatment. This device uses a sludge scraper to scrape off the sludge at the bottom of the sedimentation tank. Although it can achieve the function of cleaning sludge, it still has the following defects: During the sludge scraping process, a layer of sludge inevitably sticks to the scraper. Once a lot of sludge accumulates on the scraper, it will affect the cleaning efficiency of the scraper and may also cause excessive load on the power components that drive the scraper. Summary of the Invention

[0004] Therefore, it is necessary to address the problems existing in current wastewater treatment reaction tanks by providing a wastewater treatment reaction tank. By setting up a movable scraper and a flexible movable plate, after the movable scraper scrapes off the sludge at the bottom of the sedimentation tank, the flexible movable plate can slide relative to the side of the movable scraper, thereby scraping off the sludge attached to the movable scraper. Furthermore, the flexible movable plate can generate a shaking motion through its own elastic deformation and reset action, shaking off the sludge on the surface of the flexible movable plate.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A wastewater treatment reaction tank includes:

[0007] Sedimentation tank;

[0008] A transmission chain that drives the vehicle circumferentially along a preset trajectory;

[0009] Fixed frames are spaced apart along the circumference of the transmission chain. Scraper assemblies are mounted on the fixed frames. The scraper assembly includes a movable scraper and a flexible movable plate. The movable scraper is elastically connected to the end of the fixed frame away from the transmission chain and can move along a first direction. A sensing rod is elastically connected in the fixed frame and can also move along the first direction. The flexible movable plate abuts against the side of the movable scraper and is set at an angle. The end of the flexible movable plate near the movable scraper is rotatably connected to the sensing rod, and the end of the flexible movable plate away from the movable scraper is rotatably connected to a guide rod that extends along the first direction. A guide frame is mounted on the movable scraper and is slidably connected to the guide rod.

[0010] In one embodiment, a first limiting ring is provided at the end of the guide rod away from the flexible movable plate. When the guide frame abuts against the first limiting ring, there is a preset elastic force between the sensing rod and the fixed frame.

[0011] In one embodiment, a second limiting ring is provided at one end of the guide rod near the flexible movable plate. When the elastic force between the movable scraper and the fixed frame is at its maximum, the guide frame abuts against the second limiting ring.

[0012] In one embodiment, there are multiple scraper assemblies, which are sequentially connected to a fixed frame along a second direction.

[0013] In one embodiment, a slag collection pipe is provided at the top of the sedimentation tank, and a slag collection port is provided on the slag collection pipe for collecting floating slag pushed to the slag collection port by the scraper assembly.

[0014] In one embodiment, the sedimentation tank is further provided with a transmission component, which is used to drive the transmission chain to move circumferentially along a preset trajectory.

[0015] In one embodiment, the transmission assembly includes a drive shaft, a drive sprocket, a driven shaft, and a driven sprocket. The drive shaft is fixedly connected to the drive sprocket and is rotatable about its axis. The drive sprocket is connected to a transmission chain. There are at least three driven shafts. One driven shaft is rotatably located in the lower left part of the sedimentation tank, another driven shaft is rotatably located in the lower right part of the sedimentation tank, the two driven shafts located at the lower part of the sedimentation tank are at the same horizontal height, and the remaining driven shaft is rotatably located in the upper part of the sedimentation tank and on the side away from the drive shaft. This driven shaft is at the same horizontal height as the drive shaft and is fixedly connected to the driven sprocket. The driven sprocket is connected to the transmission chain.

[0016] In one embodiment, an inlet is provided on the upper left side of the sedimentation tank, and an outlet is provided on the upper right side of the sedimentation tank.

[0017] In one embodiment, a drain outlet is provided on the lower left side of the sedimentation tank.

[0018] In one embodiment, a gradual slope is provided at the bottom left side of the sedimentation tank.

[0019] The beneficial effects of this invention are:

[0020] This invention comprises a transmission chain, a fixed frame, a movable scraper, a flexible movable plate, and a sensing rod. The circumferential transmission of the transmission chain causes the movable scraper to move synchronously with it. When the movable scraper moves to the lower part of the sedimentation tank, it contacts the bottom of the tank, pushing the sludge to the left side. As the movable scraper moves from the left side to the upper part of the tank, the flexible movable plate slides relative to the scraping side of the movable scraper, scraping away the sludge on the side of the scraper. This prevents excessive sludge adhering to the side of the movable scraper, which would reduce its scraping efficiency, and also avoids increasing the load on the transmission chain. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of a wastewater treatment reaction tank according to the present invention;

[0022] Figure 2 This is a top view of a wastewater treatment reaction tank according to the present invention;

[0023] Figure 3 for Figure 2 Sectional view of AA;

[0024] Figure 4 This is a schematic diagram of a transmission chain in a reaction tank for wastewater treatment according to the present invention;

[0025] Figure 5 This is a schematic diagram of the first state of a scraper assembly in a reaction tank for wastewater treatment according to the present invention;

[0026] Figure 6 This is a schematic diagram of the second state of a scraper assembly in a reaction tank for wastewater treatment according to the present invention;

[0027] Figure 7 This is an exploded view of a scraper assembly in a reaction tank for wastewater treatment according to the present invention.

[0028] Figure 8 This is a front view of a first state of a scraper assembly in a reaction tank for wastewater treatment according to the present invention;

[0029] Figure 9 This is a front view of the second state of a scraper assembly in a reaction tank for wastewater treatment according to the present invention;

[0030] Figure 10 This is a front view of the scraper assembly in a reaction tank for wastewater treatment according to the present invention, in its third state.

[0031] in:

[0032] 100. Sedimentation tank; 110. Progressive ramp; 200. Drive chain; 300. Fixed frame; 310. First connecting frame; 320. Second connecting frame; 400. Scraper assembly; 410. Movable scraper; 420. Flexible movable plate; 430. Sensing rod; 440. Guide rod; 441. First limiting ring; 442. Second limiting ring; 450. Guide frame; 500. Slag collection pipe; 510. Slag collection port; 600. Transmission assembly; 610. Drive shaft; 620. Drive sprocket; 630. Driven shaft; 640. Driven sprocket; 710. Water inlet; 720. Drain outlet; 730. Sewage outlet; 810. Motor; 820. Output wheel; 830. Driven wheel. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0034] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] like Figures 1-10As shown, a wastewater treatment reaction tank includes a sedimentation tank 100, a drive chain 200, a fixed frame 300, and a scraper assembly 400. The drive chain 200 is disposed within the sedimentation tank 100 and rotates clockwise circumferentially along a preset trajectory. Fixed frames 300 are spaced apart circumferentially along the drive chain 200. Scraper assemblies 400 are mounted on the fixed frames 300. The scraper assembly 400 includes a movable scraper 410 and a flexible movable plate 420. The movable scraper 410 is elastically connected to the end of the fixed frame 300 away from the drive chain 200. Specifically, in the fixed frame 300... A mounting slot is provided on the 00, and a first compression spring is provided at the bottom of the mounting slot. The end of the first compression spring away from the bottom of the mounting slot is fixedly connected to the movable scraper 410. The movable scraper 410 can move along a first direction, which is the direction in which the height of the movable scraper 410 is located. A sensing rod 430 is elastically connected in the fixed frame 300. The sensing rod 430 can also move along the first direction. Specifically, the sensing rod 430 is connected by a first tension spring. One end of the first tension spring is fixedly connected to the sensing rod 430, and the other end of the first tension spring is fixedly connected to the fixed frame 300. Before the first tension spring is stretched, such as Figure 5 As shown, the sensing rod 430 is in its maximum extended state. The flexible movable plate 420 abuts against the side of the movable scraper 410 and is set at an angle. The end of the flexible movable plate 420 near the movable scraper 410 is rotatably connected to the sensing rod 430. The end of the flexible movable plate 420 away from the movable scraper 410 is rotatably connected to the guide rod 440. The guide rod 440 extends along the first direction. The movable scraper 410 is provided with a guide frame 450, and the guide frame 450 is slidably connected to the guide rod 440.

[0037] To connect the fixed frame 300 to the drive chain 200, such as Figure 7 As shown, a first connecting frame 310 is fixedly connected to the side of the transmission chain 200, and a second connecting frame 320 is fixedly connected to the fixed frame 300. The second connecting frame 320 and the first connecting frame 310 are connected by a pin.

[0038] At work, such as Figure 3As shown, the transmission chain 200 rotates clockwise along a preset trajectory. The fixed frame 300 and scraper assembly 400 mounted on the transmission chain 200 rotate clockwise synchronously. When the scraper assembly 400 moves to the lower part of the sedimentation tank 100, the movable scraper 410 moves towards the fixed frame 300 under the squeezing action of the bottom of the sedimentation tank 100. At this time, the first compression spring is compressed, and the movable scraper 410 is in close contact with the bottom of the sedimentation tank 100. As the transmission chain 200 continues to rotate, the movable scraper 410... As the scraper assembly 400 moves from right to left, it scrapes the sludge at the bottom of the sedimentation tank 100 from right to left, causing the sludge to accumulate on the left side of the bottom of the sedimentation tank 100. When the scraper assembly 400 moves to the right side of the bottom of the sedimentation tank 100 following the transmission chain 200, the sensing rod 430 is also squeezed by the bottom of the sedimentation tank 100 and moves towards the fixed frame 300. At this time, the flexible movable plate 420 is forced to move along with the sensing rod 430 to a position close to the fixed frame 300. The position of the flexible movable plate 420 is as follows: Figure 9 As shown, when the scraper assembly 400 moves from right to left at the bottom of the sedimentation tank 100, the flexible movable plate 420 remains in contact with the side of the movable scraper 410 at an angle, thus preventing sludge from crossing the flexible movable plate 420. When the scraper assembly 400 moves to the bottom left position of the sedimentation tank 100, the movable scraper 410 and the sensing rod 430 gradually disengage from the pressing engagement with the bottom of the sedimentation tank 100. At this time, under the action of the first compression spring, the movable scraper 410 moves away from the flexible movable plate 420, and simultaneously under the action of the first tension spring... The sensing rod 430 drives the flexible movable plate 420 to move away from the fixed frame 300. Because the moving distance of the sensing rod 430 is greater than the moving distance of the flexible movable plate 420, the flexible movable plate 420 can move a greater distance away from the fixed frame 300 relative to the movable scraper 410, thereby scraping off the sludge adhering to the side of the movable scraper 410. This avoids excessive sludge adhering to the side of the movable scraper 410, which would reduce the scraping efficiency of the movable scraper 410. At the same time, it also avoids increasing the transmission load on the transmission chain 200.

[0039] In a further embodiment, such as Figure 8 and Figure 10 As shown, in order to allow the sludge adhering to the flexible movable plate 420 to detach from the flexible movable plate 420, a first limiting ring 441 is provided at the end of the guide rod 440 away from the flexible movable plate 420. When the guide frame 450 abuts against the first limiting ring 441, there is a preset elastic force between the sensing rod 430 and the fixed frame 300.

[0040] When the guide rod 440 from Figure 10 The state shown moves to Figure 8In the indicated state, the guide rod 440 moves with the flexible movable plate 420 until it abuts against the first limiting ring 441. Under the limiting action of the first limiting ring 441 and the guide frame 450, the guide rod 440 cannot continue to move away from the fixed frame 300 along with the sensing rod 430 through the flexible movable plate 420. At this time, there is still a preset elastic force between the sensing rod 430 and the fixed frame 300, so the sensing rod 430 will continue to move away from the fixed frame 300, so that the flexible movable plate 420 itself will deform to a certain extent, thereby making the flexible movable plate 420 flip over, and changing the side of the flexible movable plate 420 and the movable scraper 410 at an angle. During the process from the flexible movable plate 420 deforming to the completion of flipping, it will generate instantaneous vibration, thereby dropping the sludge attached to the flexible movable plate 420, avoiding the reduction of the cleaning efficiency of the flexible movable plate 420 on the movable scraper 410 due to the large amount of sludge adhering to the flexible movable plate 420.

[0041] In a further embodiment, such as Figure 2 As shown, a second limiting ring 442 is provided at one end of the guide rod 440 near the flexible movable plate 420. When the elastic force between the movable scraper 410 and the fixed frame 300 is at its maximum, the guide frame 450 abuts against the second limiting ring 442.

[0042] After the movable scraper 410 and sensing rod 430 move towards the fixed frame 300 until the second limiting ring 442 abuts against the guide frame 450, if there is a lot of sludge on the side where the movable scraper 410 and flexible movable plate 420 are located, since the movable scraper 410 and flexible movable plate 420 are set at an angle, the sludge will accumulate at the angle position between the movable scraper 410 and flexible movable plate 420. As a result, the sludge will exert an upward thrust on the flexible movable plate 420. Thus, the flexible movable plate 420 drives the movable scraper 410 to move towards the fixed frame 300 through the second limiting ring 442 and guide frame 450, lifting the movable scraper 410 a certain distance so that the movable scraper 410 is separated from the bottom of the sedimentation tank 100. This avoids excessive resistance when the sludge is thick, which could cause the transmission chain 200 to overload the scraper assembly 400.

[0043] In a further embodiment, such as Figure 7 As shown, there are multiple scraper assemblies 400, and the multiple scraper assemblies 400 are sequentially connected to the fixed frame 300 along the second direction, which is the front-to-back direction.

[0044] By setting multiple scraper assemblies 400, when there is a lot of sludge in the area where a certain scraper assembly 400 is located, only that movable scraper 410 will be raised, while the other movable scrapers 410 will not be raised. This not only avoids the movable scraper 410 from tilting due to the different resistance at the front and rear ends, but also avoids the movable scraper 410 moving upward as a whole, which would cause an excessive reduction in sludge cleaning efficiency.

[0045] In a further embodiment, such as Figure 1 As shown, a slag collection pipe 500 is provided at the upper part of the sedimentation tank 100, and a slag collection port 510 is provided on the slag collection pipe 500. The slag collection port 510 is used to collect the floating slag pushed to the slag collection port 510 by the scraper assembly 400.

[0046] When the drive chain 200 runs from left to right in the upper part of the sedimentation tank 100, the scraper assembly 400 can push the scum in the upper part of the sedimentation tank 100 from left to right, so that the scum is collected into the scum collection pipe 500 through the scum collection port 510, thereby cleaning the scum in the sewage in the sedimentation tank 100.

[0047] In a further embodiment, a transmission assembly 600 is also provided in the sedimentation tank 100. The transmission assembly 600 is used to drive the transmission chain 200 circumferentially along a preset trajectory. The transmission assembly 600 includes a drive shaft 610, a drive sprocket 620, a driven shaft 630, and a driven sprocket 640. The drive shaft 610 is fixedly connected to the drive sprocket 620 and can rotate around its axis. The drive sprocket 620 is connected to the transmission chain 200. There are at least three driven shafts 630, one of which is a driven shaft 640. One driven shaft 630 is rotatably positioned at the lower left of the sedimentation tank 100, while another driven shaft 630 is rotatably positioned at the lower right of the sedimentation tank 100. The two driven shafts 630 located at the lower part of the sedimentation tank 100 are at the same horizontal height. The remaining driven shaft 630 is rotatably positioned at the upper part of the sedimentation tank 100 and on the side away from the drive shaft 610. This driven shaft 630 is at the same horizontal height as the drive shaft 610. The driven shaft 630 is fixedly connected to the driven sprocket 640, and the driven sprocket 640 is connected to the transmission chain 200.

[0048] When the transmission chain 200 needs to be driven clockwise along a preset track, the drive shaft 610 rotates clockwise around its axis. The drive shaft 610 drives the drive sprocket 620 to rotate, and the rotation of the drive sprocket 620 drives the transmission chain 200 to be driven clockwise around the preset track. At the same time, with the transmission support of multiple driven sprockets 640, the transmission chain 200 rotates clockwise along the preset track.

[0049] Furthermore, to drive the drive shaft 610 to rotate, a driven wheel 830 is fixedly connected to one end of the drive shaft 610. A motor 810 is installed at the top of the sedimentation tank 100. An output wheel 820 is fixedly connected to the output shaft of the motor 810, and the output wheel 820 is belt-driven to the driven wheel 830. Thus, the motor 810 drives the output wheel 820 to rotate, the output wheel 820 drives the driven wheel 830 to rotate, and the driven wheel 830 drives the drive shaft 610 to rotate. Consequently, the drive shaft 610 drives the transmission chain 200 clockwise along a preset trajectory via the drive sprocket 620.

[0050] In a further embodiment, such as Figure 3 As shown, an inlet 710 is provided on the upper left side of the sedimentation tank 100, and an outlet 720 is provided on the upper right side of the sedimentation tank 100.

[0051] This configuration is designed to ensure that the inlet 710 and outlet 720 are aligned with the transmission direction of the transmission chain 200. The scum in the sewage entering the sedimentation tank 100 through the inlet 710 can be collected by the scum collection pipe 500 before the sewage is discharged through the outlet 720.

[0052] In a further embodiment, such as Figure 3 As shown, a sludge outlet 730 is provided on the lower left side of the sedimentation tank 100. The sludge outlet 730 is provided to discharge the sludge that accumulates on the lower left side of the sedimentation tank 100.

[0053] In a further embodiment, such as Figure 3 As shown, a gradual slope 110 is provided at the bottom left side of the sedimentation tank 100. This is designed so that the bottom left side of the sedimentation tank 100 can accommodate more sludge, and the sludge collected at the bottom left side of the sedimentation tank 100 will not interfere with the operation of the scraper assembly 400.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A reaction tank for sewage treatment, characterized by comprising: Comprise: A sedimentation tank; A transmission chain, the transmission chain is driven along a preset track in a circumferential direction; A fixed frame is arranged at intervals in the circumferential direction of the transmission chain, a scraper assembly is arranged on the fixed frame, the scraper assembly comprises a movable scraper and a flexible movable plate, the movable scraper is elastically connected to one end of the fixed frame away from the transmission chain, the movable scraper can move in a first direction, a sensing rod is elastically connected in the fixed frame, the sensing rod can also move in the first direction, the flexible movable plate is in contact with the side of the movable scraper at an angle, one end of the flexible movable plate close to the movable scraper is rotationally connected with the sensing rod, the other end of the flexible movable plate away from the movable scraper is rotationally connected with a guide rod, the guide rod extends in the first direction, a guide frame is arranged on the movable scraper, the guide frame is slidingly connected with the guide rod; A first limiting ring is arranged at the end of the guide rod away from the flexible movable plate, when the guide frame abuts against the first limiting ring, the sensing rod and the fixed frame have a preset elastic force between them; A second limiting ring is arranged at the end of the guide rod close to the flexible movable plate, when the elastic force between the movable scraper and the fixed frame is maximum, the guide frame abuts against the second limiting ring; There are a plurality of scraper assemblies, the plurality of scraper assemblies are connected in sequence on the fixed frame in a second direction; A slag collecting pipe is arranged at the upper part of the sedimentation tank, a slag collecting port is formed in the slag collecting pipe, the slag collecting port is used to collect the dross pushed to the slag collecting port by the scraper assembly; A transmission assembly is further arranged in the sedimentation tank, the transmission assembly is used to drive the transmission chain to drive in a circumferential direction along a preset track; The transmission assembly comprises a drive shaft, a drive sprocket, a driven shaft and a driven sprocket, the drive shaft is fixedly connected with the drive sprocket, the drive shaft can rotate about its axis, the drive sprocket is drivingly connected with the transmission chain, the number of driven shafts is at least three, one of the driven shafts is rotationally arranged at the lower left part of the sedimentation tank, another driven shaft is rotationally arranged at the lower right part of the sedimentation tank, the two driven shafts at the lower part of the sedimentation tank are at the same horizontal height, the remaining one driven shaft is rotationally arranged at the upper part of the sedimentation tank away from the side of the drive shaft, the driven shaft is at the same horizontal height as the drive shaft, the driven shaft is fixedly connected with the driven sprocket, and the driven sprocket is drivingly connected with the transmission chain.

2. The reactor tank for sewage treatment according to claim 1, wherein A water inlet is arranged at the upper left side of the sedimentation tank, and a drain port is arranged at the upper right side of the sedimentation tank.

3. The reactor tank for sewage treatment according to claim 2, wherein A sewage outlet is arranged at the lower left side of the sedimentation tank.

4. The reactor tank for sewage treatment according to claim 3, wherein A gradual slope is arranged at the bottom of the left side of the sedimentation tank.

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