Tunnel wastewater treatment processing device

Abstract

The application belongs to the technical field of water treatment equipment, and particularly relates to a tunnel wastewater treatment processing equipment, which comprises a water treatment box body composed of an anaerobic section, an aerobic section, a secondary sedimentation tank and a clear water tank, wherein the anaerobic section, the aerobic section, the secondary sedimentation tank and the clear water tank are sequentially communicated; a cleaning unit is driven by a gas cylinder to slide on the side wall of a conical sedimentation tank, the inner wall of the conical sedimentation tank is cleaned, the sludge layer adhered to the inner wall of the conical sedimentation tank is separated from the conical sedimentation tank, and reenters the sludge backflow circulation, so that the efficiency of the water treatment box body on tunnel construction wastewater is improved; specifically, when the gas cylinder drives the cleaning unit, the driving arm can be rotated by extrusion, so that the cleaning plate is flatly attached to the inner wall of the conical sedimentation tank and keeps moving downward, so that the sludge adhered to the conical sedimentation tank can be scraped off and dispersed, reenters the sludge backflow circulation, and the water treatment efficiency is prevented from being reduced due to frequent cleaning cycles.

Description

Technical Field

[0001] This invention belongs to the field of water treatment equipment technology, specifically a tunnel wastewater treatment and processing equipment. Background Technology

[0002] Tunnel wastewater treatment equipment is a specialized device designed for treating wastewater from tunnel construction and operation. This equipment typically employs physical, chemical, or biological treatment methods to remove suspended solids, oil, heavy metals, and other harmful substances from the wastewater, ensuring it meets discharge standards. The basic structure is usually composed of corrosion-resistant materials such as stainless steel and carbon steel, possessing excellent corrosion resistance and aging resistance, with a service life exceeding 30 years.

[0003] Integrated wastewater treatment equipment combines primary sedimentation tanks, anaerobic tanks, aerobic tanks, secondary sedimentation tanks, and purification tanks into a single unit, further improving wastewater treatment levels. The biological treatment system is the core component of this integrated system, utilizing microorganisms to decompose organic matter in wastewater and convert it into inorganic matter. Biological treatment systems typically employ two methods: aerobic and anaerobic treatment. Aerobic treatment utilizes aerobic microorganisms to decompose organic matter under aerobic conditions, while anaerobic treatment utilizes anaerobic microorganisms to decompose organic matter under anaerobic conditions. After biological treatment, the wastewater is piped into the secondary sedimentation tank. The supernatant at the top of the secondary sedimentation tank overflows into the purification tank, while flocculent matter and other impurities collect under gravity in the conical sedimentation tank within the secondary sedimentation tank and are then sent to the aerobic tank via a sludge return pipe for further reaction with the wastewater.

[0004] The existing integrated wastewater treatment equipment requires regular cleaning of the tanks, especially the secondary sedimentation tank adjacent to the water purification tank. If an increase in particulate matter concentration is detected at the inlet of the water purification tank, it indicates that a lot of sludge and sediment has adhered to the conical sedimentation tank and needs to be cleaned. To address this issue, the existing technology can only clean the equipment by stopping the machine, and cannot clean the secondary sedimentation tank regularly without stopping the machine, thus reducing the accumulation of sludge in the secondary sedimentation tank and resulting in low wastewater treatment efficiency in the tunnel.

[0005] Therefore, the present invention provides a tunnel wastewater treatment and processing equipment. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is: a tunnel wastewater treatment and processing equipment according to this invention, comprising:

[0008] A water treatment tank consisting of an anaerobic section, an aerobic section, a secondary sedimentation tank, and a purification tank, wherein the anaerobic section, the aerobic section, the secondary sedimentation tank, and the purification tank are connected in sequence.

[0009] Also includes:

[0010] The inlet is located at one end of the anaerobic section;

[0011] The water outlet is located at one end of the water purification tank;

[0012] An overflow weir and a conical sedimentation tank are installed in the secondary sedimentation tank, with the overflow weir positioned above the conical sedimentation tank;

[0013] A cleaning unit is fixed to the center of the conical sedimentation tank for cleaning the conical sedimentation tank and delaying the cleaning cycle of the secondary sedimentation tank.

[0014] The cleaning unit includes:

[0015] Cleaning board;

[0016] A vertical shaft fixed to the center of the conical sedimentation tank;

[0017] A sliding shaft that is slidably connected to a vertical shaft;

[0018] The drive arm assembly, which is hinged to the cleaning plate and the sliding shaft, is used to drive the cleaning plate to move within the conical sedimentation tank.

[0019] Preferably, the cleaning plate includes a main board and two sub-boards; the two sub-boards are slidably engaged with both ends of the main board; the main board has grooves at both ends, and the two sub-boards are slidably connected to the grooves on the main board via shafts.

[0020] Preferably, a first limiting plate is fixedly connected to the upper end of the sliding shaft, and a base is fixedly connected to the lower end of the sliding shaft; one end of the drive arm assembly is hinged to the sliding shaft at a position adjacent to the first limiting plate; a second limiting plate is also slidably connected to the sliding shaft, and a third spring is sleeved between the second limiting plate and the bottom of the vertical shaft for buffering the second limiting plate; a support arm is hinged to the second limiting plate, and both ends of the support arm are respectively hinged to the drive arm assembly and the second limiting plate.

[0021] Preferably, the drive arm assembly includes a hinged arm; one end of the hinged arm is hinged to a sliding shaft, and the other end of the hinged arm is slidably connected to an extension arm; one end of the extension arm is hinged to a cleaning plate; the bottom of the other end of the hinged arm is also hinged to a support arm, and the two ends of the support arm are respectively hinged to the hinged arm and the second limiting plate.

[0022] Preferably, the other end of the extension arm is fixedly connected to a connecting support, and a first spring is sleeved on the extension arm; the two ends of the first spring are fixedly connected between the connecting support and the end of the hinge arm.

[0023] Preferably, the end of the connecting support opposite to the extension arm is also hinged to a first connecting rod; the second limiting plate is also hinged to a second connecting rod, and the ends of the first connecting rod and the second connecting rod are hinged together.

[0024] Preferably, a second spring is fixed between the second limiting plate and the base, and the second spring is sleeved on the sliding shaft.

[0025] Preferably, the bottom of the vertical shaft is fixedly connected to a fixing frame, and the vertical shaft is fixedly connected to the center of the conical sedimentation tank via the fixing frame; the top of the vertical shaft is provided with a threaded section for engaging a nut.

[0026] Preferably, the top of the water treatment tank is provided with a top cover, and multiple inspection ports are sequentially opened on the top cover corresponding to the anaerobic section, aerobic section, secondary sedimentation tank and water purification tank; a sludge return pipe is connected between the secondary sedimentation tank and the aerobic section.

[0027] Preferably, the aerobic section is connected to the secondary sedimentation tank by a connecting pipe, and the outlet of the connecting pipe is located between the overflow weir and the conical sedimentation tank, and the outlet is close to the center of the conical sedimentation tank; the connection between the secondary sedimentation tank and the water purification tank is located at the bottom edge of the overflow weir.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The tunnel wastewater treatment and processing equipment of the present invention utilizes a cylinder-driven cleaning unit that slides on the side wall of a conical sedimentation tank to clean the inner wall of the conical sedimentation tank. This separates the sludge layer adhering to the inner wall of the conical sedimentation tank from the tank and allows it to re-enter the sludge return circulation, thereby improving the efficiency of the water treatment tank for tunnel construction wastewater. Specifically, when the cylinder drives the cleaning unit, the cleaning plate can be flat against the inner wall of the conical sedimentation tank by squeezing the drive arm to rotate, while maintaining a downward displacement. This allows the sludge adhering to the conical sedimentation tank to be scraped off and broken up, and then re-enter the sludge return circulation, preventing a decrease in water treatment efficiency due to frequent cleaning cycles.

[0030] 2. The tunnel wastewater treatment and processing equipment of the present invention, wherein the first and second connecting rods hinged to the connecting support will gradually move from a folded state to a parallel state, and the ends of the first and second connecting rods are hinged. Therefore, under the compression of the second connecting rod, the second limiting plate will move towards the bottom support. At this time, the support arm hinged to the second limiting plate will deflect in the opposite direction, pulling the drive arm assembly to deflect away from the inner wall of the conical sedimentation tank. At this time, the angle between the support arm and the drive arm assembly increases, preventing the cylinder from continuously pressing down and continuously expanding the support arm through the reaction force of the third spring, causing the drive arm to get stuck with the inner wall of the conical sedimentation tank; Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1 This is a perspective view of the present invention;

[0033] Figure 2 This is a top view of the present invention;

[0034] Figure 3 yes Figure 2 Sectional view at point AA;

[0035] Figure 4 This is a perspective view of the conical sedimentation tank and cleaning unit in this invention;

[0036] Figure 5 This is a perspective view of the cleaning unit in this invention;

[0037] Figure 6 yes Figure 5 Enlarged view of point I in the image;

[0038] Figure 7 This is a front view of the cleaning unit in this invention;

[0039] Figure 8 This is a diagram showing the assembly of the vertical shaft, sliding shaft, and second limiting plate in this invention.

[0040] In the diagram: 1. Top cover; 11. Inspection port; 2. Water treatment tank; 21. Anaerobic section; 22. Aerobic section; 23. Secondary sedimentation tank; 24. Clean water tank; 25. Inlet; 26. Outlet; 27. Sludge return pipe; 28. Connecting pipe; 29. ​​Overflow weir; 4. Conical sedimentation tank; 5. Cleaning plate; 51. Main plate; 52. Dividing plate; 53. Slide chute; 6. Cleaning unit; 61. Sliding shaft; 62. First limiting plate; 621. Hinge arm; 622. Extension arm; 623. First spring; 624. Connecting support; 625. First connecting rod; 626. Second connecting rod; 627. Support arm; 63. Base; 64. Second limiting plate; 65. Second spring; 66. Third spring; 7. Fixing frame; 71. Vertical shaft; 72. Threaded section. Detailed Implementation

[0041] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0042] like Figures 1 to 4 As shown in the figure, a tunnel wastewater treatment and processing equipment according to an embodiment of the present invention includes:

[0043] The water treatment tank 2 consists of an anaerobic section 21, an aerobic section 22, a secondary sedimentation tank 23, and a water purification tank 24, wherein the anaerobic section 21, the aerobic section 22, the secondary sedimentation tank 23, and the water purification tank 24 are connected in sequence.

[0044] Also includes:

[0045] Inlet 25 is located at one end of the anaerobic section 21;

[0046] The water outlet 26 is located at one end of the water purification tank 24;

[0047] An overflow weir 29 and a conical sedimentation tank 4 are installed in the secondary sedimentation tank 23, with the overflow weir 29 positioned above the conical sedimentation tank 4;

[0048] A cleaning unit 6 is fixedly connected to the center of the conical sedimentation tank 4, which is used to clean the conical sedimentation tank 4 and delay the cleaning cycle of the secondary sedimentation tank 23.

[0049] The cleaning unit 6 includes:

[0050] Cleaning plate 5;

[0051] Vertical shaft 71 is fixed to the center of the conical sedimentation tank 4;

[0052] A sliding shaft 61 is slidably connected to the vertical shaft 71;

[0053] The drive arm assembly, which is hinged to the cleaning plate 5 and the sliding shaft 61, is used to drive the cleaning plate 5 to move within the conical sedimentation tank 4.

[0054] When the processing equipment provided by the present invention is used, the wastewater generated during tunnel construction is pretreated and then introduced into the water treatment tank 2 through the inlet 25. After passing through the anaerobic section 21 and the aerobic section 22 in sequence, the wastewater is introduced into the secondary sedimentation tank 23. In the secondary sedimentation tank 23, by controlling the water inflow rate of the secondary sedimentation tank 23, the supernatant in the secondary sedimentation tank 23 can cross the overflow weir 29 and flow out into the clean water tank 24, thereby realizing the treatment of wastewater.

[0055] When the particulate matter concentration increases at the connection between the secondary sedimentation tank 23 and the purification tank 24, the concentration detection sensor controls the external cylinder to drive the cleaning unit 6 to slide on the side wall of the conical sedimentation tank 4, thereby cleaning the inner wall of the conical sedimentation tank 4. This separates the sludge layer attached to the inner wall of the conical sedimentation tank 4 from the conical sedimentation tank 4 and allows it to re-enter the sludge return cycle, improving the efficiency of the water treatment tank 2 for tunnel construction wastewater. Specifically, when the cylinder drives the cleaning unit 6, the squeezing drive arm rotates, causing the cleaning plate 5 to lie flat against the inner wall of the conical sedimentation tank 4 and maintain a downward displacement, so that the sludge attached to the conical sedimentation tank 4 can be scraped off and broken up before re-entering the sludge return cycle.

[0056] like Figure 4 As shown, the cleaning plate 5 includes a main board 51 and two sub-boards 52; the two sub-boards 52 are slidably engaged with both ends of the main board 51; the main board 51 has grooves 53 at both ends, and the two sub-boards 52 are slidably connected to the grooves 53 on the main board 51 via shafts.

[0057] When the cleaning plate 5 provided by the present invention is in use, the cleaning plate 5 is initially located at the top of the conical sedimentation tank 4. When the driving arm assembly moves the cleaning plate 5 downward, the two side plates 52 at both ends of the main plate 51 will move towards each other, thereby reducing the overall length of the cleaning plate 5 to adapt to the shape of the conical sedimentation tank 4. The two side plates 52 are slidably connected to the main plate 51 via shafts, and springs are also provided between the two side plates 52 and the main plate 51. The springs allow the side plates 52 and the main plate 51 to automatically unfold without external force. It is worth noting that the external force here refers to the reaction force applied by the conical sedimentation tank 4 to the side plates 52.

[0058] like Figure 8 As shown, the upper end of the sliding shaft 61 is fixedly connected to a first limiting plate 62, and the lower end of the sliding shaft 61 is fixedly connected to a base support 63; one end of the drive arm assembly is hinged to the sliding shaft 61 at a position adjacent to the first limiting plate 62; a second limiting plate 64 is also slidably connected to the sliding shaft 61, and a third spring 66 is sleeved between the second limiting plate 64 and the bottom of the vertical shaft 71 for buffering the second limiting plate 64; a support arm 627 is hinged to the second limiting plate 64, and the two ends of the support arm 627 are respectively hinged to the drive arm assembly and the second limiting plate 64.

[0059] When in use, the sliding shaft 61 provided by the present invention is hinged to one end of the drive arm assembly at a position adjacent to the first limiting plate 62. At the same time, the drive arm assembly is supported by the support arm 627. In addition, when the cylinder squeezes the first limiting plate 62 downward, the sliding shaft 61 slides downward on the vertical shaft 71 as a whole, and the third spring 66 is compressed to achieve a buffering effect on the cleaning unit 6. The reaction force exerted by the third spring 66 on the second limiting plate 64 can make the second limiting plate 64 slide in the opposite direction on the sliding shaft 61. The drive arm assembly is squeezed open by the support arm 627, so that the cleaning plate 5 hinged at one end of the drive arm assembly can always be attached to the side wall of the conical sedimentation tank 4, so as to clean the sludge layer attached to the inner wall of the conical sedimentation tank 4 and allow the cleaned sludge to re-enter the sludge circulation.

[0060] When the support arm 627 is in the state of expanding the drive arm assembly, the angle between the support arm 627 and the drive arm assembly is an acute angle. As the cleaning unit 6 gradually moves downward, the angle between the support arm 627 and the drive arm assembly gradually decreases.

[0061] like Figures 6 to 8As shown, the drive arm assembly includes a hinged arm 621; one end of the hinged arm 621 is hinged to the sliding shaft 61, and the other end of the hinged arm 621 is slidably connected to an extension arm 622; one end of the extension arm 622 is hinged to the cleaning plate 5; the bottom of the other end of the hinged arm 621 is also hinged to a support arm 627, and the two ends of the support arm 627 are respectively hinged to the hinged arm 621 and the second limiting plate 64.

[0062] When the drive arm assembly provided by the present invention is in use, when the cylinder presses the first limiting plate 62 to move downward, the third spring 66 is compressed. The reaction force of the third spring 66 causes the support arm 627 to deflect and the hinge arm 621 to unfold. When the hinge arm 621 unfolds, the cleaning plate 5 can always be attached to the inner wall of the conical sedimentation tank 4 to achieve cleaning of the inner wall of the conical sedimentation tank 4.

[0063] Since the bottom opening of the conical sedimentation tank 4 is smaller than the top opening, the cleaning plate 5 needs to retract as the cleaning unit 6 gradually moves downward. The hinge arm 621 and the extension arm 622 also need to retract. Specifically, as the cleaning unit 6 moves downward, the extension arm 622 will retract inward along the hinge arm 621.

[0064] like Figures 5 to 7 As shown, the other end of the extension arm 622 is fixedly connected to the connecting support 624, and a first spring 623 is sleeved on the extension arm 622; the two ends of the first spring 623 are fixedly connected between the connecting support 624 and the end of the hinge arm 621.

[0065] When the extension arm 622 provided by the present invention is in use, as the cleaning unit 6 moves downward, the extension arm 622 will retract into the hinge arm 621, and drive the connecting support 624 to gradually approach the sliding shaft 61. At the same time, the first spring 623 is stretched, and the first spring 623 plays a certain buffering role. When the cleaning unit 6 moves in the opposite direction, the first spring 623 can drive the extension arm 622 to slide in the opposite direction at the end of the hinge arm 621, ensuring that the cleaning plate is always in contact with the inner wall of the conical sedimentation tank 4.

[0066] like Figure 7 As shown, the end of the connecting support 624 opposite to the extension arm 622 is also hinged to a first connecting rod 625; the second limiting plate 64 is also hinged to a second connecting rod 626, and the ends of the first connecting rod 625 and the second connecting rod 626 are hinged together.

[0067] In another embodiment of the present invention, when the connecting support 624 moves with the extension arm 622, specifically, when the cleaning unit 6 moves downward and gradually approaches the bottom opening of the conical sedimentation tank 4, the connecting support 624 continues to move towards the sliding shaft 61. At this time, the first connecting rod 625 and the second connecting rod 626, which are hinged to the connecting support 624, will gradually move from a folded state to a parallel state. Since the ends of the first connecting rod 625 and the second connecting rod 626 are hinged, under the pressure of the second connecting rod 626, the second limiting plate 64 will move towards the bottom support 63. At this time, the support arm 6, which is hinged to the second limiting plate 64, will... 27. Reverse deflection pulls the drive arm assembly toward the direction away from the inner wall of the conical sedimentation tank 4. At this time, the angle between the support arm 627 and the drive arm assembly increases, preventing the cylinder from continuously pressing down and continuously expanding the support arm 627 through the reaction force of the third spring 66, causing the drive arm to get stuck with the inner wall of the conical sedimentation tank 4. Then, the control cylinder rises back and no longer applies pressure to the first limit plate 62. At this time, under the elastic potential energy of the third spring 66, the cleaning unit 6 rises rapidly as a whole. With the help of the second spring 65, the angle between the support arm 627 and the drive arm assembly decreases, and the drive arm assembly returns to the state of oblique contact with the inner wall of the conical sedimentation tank 4.

[0068] like Figures 7 to 8 As shown, a second spring 65 is fixed between the second limiting plate 64 and the base 63, and the second spring 65 is sleeved on the sliding shaft 61.

[0069] The elastic coefficient of the second spring 65 provided by this invention is smaller than that of the third spring 66. When the first limiting plate 62 is subjected to axial pressure from the cylinder, the sliding shaft 61 is displaced downward as a whole. Under the reaction force of the third spring 66, the second limiting plate 64 is displaced toward the first limiting plate 62. At this time, the angle between the support arm 627 and the drive arm assembly decreases, causing the second spring 65 to be stretched and generating elastic potential energy. As the sliding shaft 61 gradually moves downward to near the bottom opening of the conical sedimentation tank 4, the angle between the drive arm assembly and the support arm 627 continues to decrease. At this time, the second limiting plate 64 and the first limiting plate 62 gradually approach each other, and the drive arm assembly and the conical sedimentation tank... 4. The inner wall tends to be vertical, which may cause jamming. By retracting the extension arm 622, the connecting support 624 is displaced. Then, the first connecting rod 625 and the second connecting rod 626 squeeze the second limiting plate 64. The pressure applied to the second limiting plate 64 by the second connecting rod 626, combined with the elastic potential energy generated by the stretching of the second spring 65, allows the second limiting plate 64 to overcome the reaction force of the third spring 66. This allows the drive arm assembly to deflect towards the sliding shaft 61, increasing the angle between the drive arm assembly and the support arm 627, and preventing the drive arm assembly from jamming with the inner wall of the conical sedimentation tank 4. The second spring 65 and the third spring 66 are coaxial.

[0070] like Figures 5 to 7As shown, the bottom of the vertical shaft 71 is fixedly connected to a fixing frame 7, and the vertical shaft 71 is fixedly connected to the center of the conical sedimentation tank 4 via the fixing frame 7; the top of the vertical shaft 71 is provided with a threaded section 72 for engaging a nut.

[0071] The fixing bracket 7 provided by the present invention is used to fix the vertical shaft 71, and the threaded section 72 at the top of the vertical shaft 71 can cooperate with the nut to limit the reset sliding shaft 61 and the first limiting plate 62.

[0072] like Figures 1 to 3 As shown, the top of the water treatment tank 2 is provided with a top cover 1, and multiple inspection ports 11 are sequentially opened on the top cover 1 corresponding to the anaerobic section 21, the aerobic section 22, the secondary sedimentation tank 23 and the water purification tank 24; a sludge return pipe 27 is connected between the secondary sedimentation tank 23 and the aerobic section 22.

[0073] When the water treatment tank 2 provided by the present invention is in use, the operating status can be monitored through the multiple inspection ports 11 provided on the top cover 1. The sludge and impurities settled in the secondary sedimentation tank 23 can be sent to the aerobic section 22 through the sludge circulation pump and sludge return pipe 27 to fully contact and react with the wastewater, thereby achieving further treatment of the wastewater.

[0074] like Figures 1 to 3 As shown, the aerobic section 22 is connected to the secondary sedimentation tank 23 by a connecting pipe 28, and the outlet of the connecting pipe 28 is located between the overflow weir 29 and the conical sedimentation tank 4, and the outlet is close to the center of the conical sedimentation tank 4; the connection between the secondary sedimentation tank 23 and the water purification tank 24 is located at the bottom edge of the overflow weir 29.

[0075] The connecting pipe 28 provided by the present invention is used to guide the wastewater in the aerobic section 22 to the secondary sedimentation tank 23.

[0076] Working principle: When the processing equipment provided by the present invention is in use, the wastewater generated during tunnel construction is pretreated and then introduced into the water treatment tank 2 through the inlet 25. After passing through the anaerobic section 21 and the aerobic section 22 in sequence, the wastewater is introduced into the secondary sedimentation tank 23. In the secondary sedimentation tank 23, by controlling the water inflow rate of the secondary sedimentation tank 23, the supernatant in the secondary sedimentation tank 23 can cross the overflow weir 29 and flow out into the clean water tank 24, thereby achieving the treatment of wastewater.

[0077] When the particulate matter concentration increases at the connection between the secondary sedimentation tank 23 and the purification tank 24, the concentration detection sensor controls the external cylinder to drive the cleaning unit 6 to slide on the side wall of the conical sedimentation tank 4, thereby cleaning the inner wall of the conical sedimentation tank 4. This separates the sludge layer attached to the inner wall of the conical sedimentation tank 4 from the conical sedimentation tank 4 and allows it to re-enter the sludge return cycle, improving the efficiency of the water treatment tank 2 for tunnel construction wastewater. Specifically, when the cylinder drives the cleaning unit 6, the rotating drive arm can be squeezed to make the cleaning plate 5 flat against the inner wall of the conical sedimentation tank 4 and maintain a downward displacement, so that the sludge attached to the conical sedimentation tank 4 can be scraped off and broken up before re-entering the sludge return cycle.

[0078] When in use, the cleaning plate 5 is initially positioned at the top of the conical sedimentation tank 4. When the drive arm assembly moves the cleaning plate 5 downwards, the two side plates 52 at both ends of the main plate 51 move towards each other, reducing the overall length of the cleaning plate 5 to fit the shape of the conical sedimentation tank 4. The two side plates 52 are slidably connected to the main plate 51 via shafts, and springs are also provided between the two side plates 52 and the main plate 51. The springs allow the side plates 52 and the main plate 51 to automatically unfold without external force. It is worth noting that the external force here refers to the reaction force exerted by the conical sedimentation tank 4 on the side plates 52.

[0079] When in use, the sliding shaft 61 provided by the present invention is hinged to one end of the drive arm assembly at a position adjacent to the first limiting plate 62. At the same time, the drive arm assembly is supported by the support arm 627. In addition, when the cylinder squeezes the first limiting plate 62 downward, the sliding shaft 61 slides downward on the vertical shaft 71 as a whole, and the third spring 66 is compressed to achieve a buffering effect on the cleaning unit 6. The reaction force exerted by the third spring 66 on the second limiting plate 64 can make the second limiting plate 64 slide in the opposite direction on the sliding shaft 61. The drive arm assembly is squeezed open by the support arm 627, so that the cleaning plate 5 hinged at one end of the drive arm assembly can always be attached to the side wall of the conical sedimentation tank 4, so as to clean the sludge layer attached to the inner wall of the conical sedimentation tank 4 and allow the cleaned sludge to re-enter the sludge circulation.

[0080] When the support arm 627 is in the state of expanding the drive arm group, the angle between the support arm 627 and the drive arm group is an acute angle. As the cleaning unit 6 gradually moves downward, the angle between the support arm 627 and the drive arm group gradually decreases.

[0081] Furthermore, when the connecting support 624 moves along with the extension arm 622, specifically, as the cleaning unit 6 moves downward and gradually approaches the bottom opening of the conical sedimentation tank 4, the connecting support 624 continuously moves towards the sliding shaft 61. At this time, the first connecting rod 625 and the second connecting rod 626, which are hinged to the connecting support 624, gradually move from a folded state to a parallel state. Since the ends of the first connecting rod 625 and the second connecting rod 626 are hinged, under the compression of the second connecting rod 626, the second limiting plate 64 moves towards the bottom support 63. At this time, the support arm 627, which is hinged to the second limiting plate 64, deflects in the opposite direction, pulling the drive arm. The assembly deflects away from the inner wall of the conical sedimentation tank 4. At this time, the angle between the support arm 627 and the drive arm assembly increases, preventing the cylinder from continuously pressing down and continuously expanding the support arm 627 through the reaction force of the third spring 66, causing the drive arm to jam against the inner wall of the conical sedimentation tank 4. Subsequently, the cylinder is controlled to rise, no longer applying pressure to the first limiting plate 62. At this time, under the elastic potential energy of the third spring 66, the cleaning unit 6 rises rapidly as a whole. With the cooperation of the second spring 65, the angle between the support arm 627 and the drive arm assembly decreases, and the drive arm assembly returns to a state of oblique contact with the inner wall of the conical sedimentation tank 4. The second spring 66 provided in this invention... The elastic coefficient of spring 65 is less than that of the third spring 66. When the first limiting plate 62 is subjected to axial pressure from the cylinder, the sliding shaft 61 moves downward as a whole. Under the reaction force of the third spring 66, the second limiting plate 64 moves towards the first limiting plate 62. At this time, the angle between the support arm 627 and the drive arm assembly decreases, causing the second spring 65 to be stretched and generating elastic potential energy. As the sliding shaft 61 gradually moves downward to near the bottom opening of the conical sedimentation tank 4, the angle between the drive arm assembly and the support arm 627 continues to decrease. At this time, the second limiting plate 64 and the first limiting plate 62 gradually approach each other, and the drive arm assembly and the inner wall of the conical sedimentation tank 4 tend to... Vertical alignment may cause jamming. By retracting the extension arm 622, the connecting support 624 is displaced. Then, the first connecting rod 625 and the second connecting rod 626 press the second limiting plate 64. The pressure applied to the second limiting plate 64 by the second connecting rod 626, combined with the elastic potential energy generated by the stretching of the second spring 65, allows the second limiting plate 64 to overcome the reaction force of the third spring 66. This allows the drive arm assembly to deflect towards the sliding shaft 61, increasing the angle between the drive arm assembly and the support arm 627, and preventing the drive arm assembly from jamming with the inner wall of the conical sedimentation tank 4. The second spring 65 and the third spring 66 are coaxial.

[0082] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel wastewater treatment and processing equipment, comprising: A water treatment tank (2) is composed of an anaerobic section (21), an aerobic section (22), a secondary sedimentation tank (23), and a water purification tank (24), wherein the anaerobic section (21), the aerobic section (22), the secondary sedimentation tank (23), and the water purification tank (24) are connected in sequence; Also includes: An inlet (25) is located at one end of the anaerobic section (21). The outlet (26) is located at one end of the water purification pool (24). An overflow weir (29) and a conical sedimentation tank (4) are installed in the secondary sedimentation tank (23), with the overflow weir (29) located above the conical sedimentation tank (4); Its features are: The conical sedimentation tank (4) is fixedly connected to a cleaning unit (6) for cleaning the conical sedimentation tank (4) and delaying the cleaning cycle of the secondary sedimentation tank (23); The cleaning unit (6) includes: Cleaning plate (5); A vertical shaft (71) is fixed to the center of the conical sedimentation tank (4). A sliding shaft (61) is slidably connected to a vertical shaft (71). A drive arm assembly hinged to the cleaning plate (5) and the sliding shaft (61) is used to drive the cleaning plate (5) to move within the conical sedimentation tank (4); The upper end of the sliding shaft (61) is fixedly connected to a first limiting plate (62), and the lower end of the sliding shaft (61) is fixedly connected to a base support (63); one end of the drive arm assembly is hinged to the sliding shaft (61) at a position adjacent to the first limiting plate (62); a second limiting plate (64) is also slidably connected to the sliding shaft (61), and a third spring (66) is sleeved between the second limiting plate (64) and the bottom of the vertical shaft (71) for buffering the second limiting plate (64); a support arm (627) is hinged to the second limiting plate (64), and both ends of the support arm (627) are respectively hinged to the drive arm assembly and the second limiting plate (64); The drive arm assembly includes a hinged arm (621); one end of the hinged arm (621) is hinged to the slide shaft (61), and the other end of the hinged arm (621) is slidably connected to an extension arm (622); one end of the extension arm (622) is hinged to the cleaning plate (5); the bottom of the other end of the hinged arm (621) is also hinged to a support arm (627), and the two ends of the support arm (627) are respectively hinged to the hinged arm (621) and the second limiting plate (64); The other end of the extension arm (622) is fixedly connected to a connecting support (624), and a first spring (623) is sleeved on the extension arm (622); the two ends of the first spring (623) are fixedly connected between the connecting support (624) and the end of the hinge arm (621); The connecting support (624) is also hinged to a first connecting rod (625) at one end away from the extension arm (622); a second connecting rod (626) is also hinged to the second limiting plate (64), and the ends of the first connecting rod (625) and the second connecting rod (626) are hinged together; A second spring (65) is fixed between the second limiting plate (64) and the base (63), and the second spring (65) is sleeved on the sliding shaft (61).

2. The tunnel wastewater treatment and processing equipment according to claim 1, characterized in that: The cleaning plate (5) includes a main board (51) and two sub-boards (52); the two sub-boards (52) are slidably engaged with both ends of the main board (51); the main board (51) has grooves (53) at both ends, and the two sub-boards (52) are slidably connected to the grooves (53) on the main board (51) via shafts.

3. The tunnel wastewater treatment and processing equipment according to claim 2, characterized in that: The bottom of the vertical shaft (71) is fixedly connected to a fixing frame (7), and the vertical shaft (71) is fixedly connected to the center of the conical sedimentation tank (4) via the fixing frame (7); the top of the vertical shaft (71) is provided with a threaded section (72) for fitting a nut.

4. The tunnel wastewater treatment and processing equipment according to claim 3, characterized in that: The top of the water treatment tank (2) is provided with a top cover (1), and multiple inspection ports (11) are opened on the top cover (1) in sequence corresponding to the anaerobic section (21), aerobic section (22), secondary sedimentation tank (23) and water purification tank (24); the secondary sedimentation tank (23) and the aerobic section (22) are connected by a sludge return pipe (27).

5. The tunnel wastewater treatment and processing equipment according to claim 4, characterized in that: The aerobic section (22) is connected to the secondary sedimentation tank (23) by a connecting pipe (28), and the outlet of the connecting pipe (28) is located between the overflow weir (29) and the conical sedimentation tank (4), and the outlet is close to the center of the conical sedimentation tank (4); the connection between the secondary sedimentation tank (23) and the water purification tank (24) is located at the bottom edge of the overflow weir (29).

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