Pulse stirring type sewage adjusting tank

Abstract

The invention relates to a pulse stirring type sewage adjusting tank which comprises a first-stage filtering unit, a second-stage filtering unit and a plurality of pulse stirring devices from the upstream side to the downstream side, the first-stage filtering unit comprises a liftable grating barrel, the top of the grating barrel is open and used for receiving sewage entering the adjusting tank, and through holes are evenly and densely distributed in the side wall of the grating barrel; the filter is used for filtering sewage; the secondary filtering unit comprises a grating plate which is vertical to the horizontal central shaft of the regulating tank; the pulse stirring device comprises a first guide rod, a first lifting chain and a stirrer body, the stirrer body is slidably connected with the first guide rod, and the stirrer body is lifted through the first lifting chain; the stirrer body comprises a diversion cavity and an air chamber which are arranged side by side, the bottom of the diversion cavity is separated from the air chamber, the bottom of the stirrer body is open, sewage enters the air chamber through the diversion cavity, the top of the air chamber is connected with an air inlet pipe for supplying air to the air chamber, and the air can return to the adjusting tank through the diversion cavity to form air release and stir water.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage regulation and treatment, and in particular relates to a pulse stirring type sewage regulating tank. Background Art

[0002] The sewage regulating tank is used at the front end of the sewage treatment system. The sewage collected by the pipe network first enters the sewage regulating tank, and the regulated sewage can enter the subsequent biochemical treatment system. The sewage regulating tank has two main functions: one is to buffer the water inflow, reduce the peak and fill the valley, and prevent large fluctuations in the water volume of the system; the other is to homogenize and stabilize the water quality of the sewage. The sewage regulating tank needs to be equipped with a stirring device to stir the sewage and prevent sludge deposition.

[0003] The current stirring device generally adopts an impeller agitator or a perforated tube aeration stirring method. The impeller agitator stirs the sewage by the rotation of the impeller. The impeller is easily entangled by fibrous debris, which can easily cause the motor to burn out. The driving motor of the impeller agitator adopts a submersible motor, which has a high failure rate and a short service life. Generally, it needs to be overhauled or replaced every 1 to 2 years, and the cost is high.

[0004] Perforated tube aeration and stirring is to install perforated aeration tubes with small holes at the bottom of the equalization tank, and set up a fan to supply air. However, the small holes are easy to be blocked. During maintenance, the water needs to be pumped out and repaired to the bottom of the tank. Moreover, since the sewage equalization tank is deep, toxic and harmful gases are easy to accumulate at the bottom, which brings danger to maintenance personnel.

[0005] In addition, traditional sewage regulating tanks are generally equipped with screens or filters on the upstream side to intercept solid debris, but the filtering effect is limited, causing solid pollutants to easily deposit inside or at the bottom of the sewage regulating tank, affecting the stable operation of subsequent work sections. Summary of the invention

[0006] In view of the above problems, the present invention provides a pulse stirring type sewage regulating tank, which includes a primary filtering unit, a secondary filtering unit and a plurality of pulse stirring devices from the upstream side to the downstream side, wherein the primary filtering unit includes a liftable grille cylinder, the top of which is open for receiving sewage entering the regulating tank, and the side wall of the grille cylinder is evenly and densely covered with through holes for filtering sewage; the secondary filtering unit includes a grille plate, which is perpendicular to the horizontal central axis of the regulating tank and is used for filtering sewage again;

[0007] The pulse stirring device includes a guide rod, a lifting chain and a stirrer body. The stirrer body is slidably connected to the guide rod, and the stirrer body is lifted by the lifting chain. The stirrer body includes a guide cavity and an air chamber cavity arranged side by side. The bottom of the guide cavity is separated from the air chamber cavity. The bottom of the stirrer body is open. The sewage enters the air chamber cavity through the guide cavity. The top of the air chamber cavity is connected to an air inlet pipe for supplying air to the air chamber cavity. The gas can return to the regulating tank through the guide cavity, forming gas release to stir the water body.

[0008] Optionally, the regulating tank is a horizontal cylinder, with an inlet pipe provided on the top of the upstream end of the regulating tank, the outlet end of the inlet pipe being above the grille tube, and the portion of the inlet pipe in the regulating tank being inclined downward, which is beneficial to increase the initial velocity of the inlet water.

[0009] Optionally, the primary filtration unit comprises a grille cylinder, a support platform 1 and at least one guide rod 2, the grille cylinder is a vertical cylindrical shape with a closed bottom; the side of the support platform 1 is fixedly connected to the side of the upstream end of the regulating tank, and the upper surface of the support platform 1 can support the bottom of the grille cylinder, thereby defining the lower limit position of the grille cylinder;

[0010] The guide rod 2 is arranged vertically, with the bottom end fixed on the upper surface of the support platform 1 and the top end passing through the regulating pool; a guide ring is provided on the top of the outer side of the grille tube, and the guide ring corresponds to the guide rod 2 one by one. The guide ring is sleeved on the outer side of the guide rod 2 to play a positioning role, so that the grille tube moves up and down along the guide rod 2.

[0011] Further optionally, the top of the grille cylinder is connected to at least one lifting chain 2, the top of the lifting chain 2 passes through the regulating tank, and is then connected to an external fixed pulley and winch. The grille cylinder is raised and lowered by winding and unwinding the lifting chain 2. When the grille cylinder moves, the guide ring is sleeved on the guide rod 2 to ensure that the grille cylinder moves along the guide rod 2.

[0012] Optionally, the primary filter unit further comprises a cleaning device, the cleaning device comprising a cleaning head and a lifting rod, the cleaning head is in a shape similar to a triangular prism, and the cleaning head has an arc in the transverse direction, so that the cleaning head and the grid tube are arranged concentrically; the longitudinal section of the cleaning head is similar to a right triangle, one right angle side is horizontal, the other right angle side is vertical, and the side is a circular arc line protruding toward the inside of the cleaning head;

[0013] The bottom of the lifting rod is connected to the center of the top surface of the cleaning head, and the top of the lifting rod extends out of the regulating pool. The lifting rod can drive the cleaning head to move up and down and left and right.

[0014] Optionally, the secondary filtering unit includes a grille plate, a driving unit and a cleaning unit, the grille plate is circular and evenly and densely covered with through holes, and the grille plate is concentrically arranged with the regulating tank; the driving unit includes a supporting component, a hydraulic cylinder and a pulling rod; the pulling rod is vertically arranged and the top is connected to the telescopic end of the hydraulic cylinder, and the bottom is connected to the downstream side of the grille plate, the hydraulic cylinder is arranged on the supporting component and can move along the supporting component, and the supporting component and the hydraulic cylinder drive the grille plate to rotate through the pulling rod;

[0015] One end of the cleaning part is connected to the supporting component, and the other end contacts the upstream side of the grid plate. The supporting component drives the cleaning part to move, which can clean the dirt attached to the upstream side of the grid plate and improve the filtering efficiency.

[0016] Further optionally, the support component is located above the regulating tank, and includes a middle track, an upstream track and a downstream track that are horizontally arranged and parallel to each other, the middle track is located directly above the grid plate and is perpendicular to the central axis of the regulating tank, the downstream track is located directly above the pull rod, the hydraulic cylinder is slidably connected to the downstream track, the upstream track is located directly above the cleaning part, and the cleaning part is slidably connected to the upstream track;

[0017] A control block is slidably connected on the middle track, the control block is connected to the hydraulic cylinder through a connecting rod 1, and the control block is connected to the cleaning part through a connecting rod 2, so that the control block drives the hydraulic cylinder and the cleaning part to move synchronously.

[0018] Further optionally, a groove is provided on the top of the regulating tank at positions corresponding to the upstream track and the downstream track, and the inside of the regulating tank is connected with the outside at the groove, so that the telescopic end of the hydraulic cylinder and the traction rod can move back and forth along the corresponding groove, and the cleaning part can move back and forth along the corresponding groove.

[0019] Further optionally, the pull rod is always kept in a vertical state, and the bottom end of the pull rod is detachably connected to at least one through hole of the grid plate, and the position where the bottom end of the pull rod is connected to the grid plate is on the radius of the grid plate.

[0020] Optionally, the outer shell of the agitator body is in a cubic shape, the bottom of the outer shell is open, the upper middle part of the upstream side surface of the outer shell is the upstream side surface of the guide cavity, the downstream side surface of the guide cavity is the upstream side surface of the air chamber cavity, and the downstream side surface of the air chamber cavity is the downstream side surface of the outer shell;

[0021] The top surface of the shell covers the rear half of the top of the guide cavity (i.e., the downstream side portion) and the top of the air chamber cavity. A partition is provided between the upstream side and the downstream side of the guide cavity. One end of the top surface of the shell is connected to the top of the partition, and the other end is connected to the downstream side of the shell, so that the front half of the top of the guide cavity (i.e., the upstream side portion) is open, and the rear half of the top of the guide cavity is connected to the top of the air chamber cavity.

[0022] An air inlet is arranged on the top surface of the shell corresponding to the air chamber cavity, and is used for connecting an air inlet pipe.

[0023] Further optionally, there is a distance between the bottom of the partition and the bottom surface of the guide cavity, so that the internal space of the guide cavity is divided into two areas by the partition, forming a deflection channel.

[0024] Further optionally, at least one limit plate is provided on the outside of the downstream side of the shell, and a through hole is provided on the limit plate, the through hole is connected to a guide rod, a lifting chain is connected to the top surface of the shell, and when the lifting chain lifts the agitator body, the agitator body is lifted and lowered along the guide rod through the limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the pulse stirring type sewage regulating tank;

[0026] Figure 2 is a schematic diagram of the agitator body;

[0027] Figure 3 is a schematic diagram of a grille tube;

[0028] Figure 4 is a schematic diagram of a cleaning device;

[0029] Figure 5 It is a schematic diagram of the cooperation between the supporting component and the grid plate;

[0030] Figure 6 This is a top view schematic diagram of the slots on the top of the regulating tank corresponding to the upstream track and the downstream track.

[0031] In the accompanying drawings, 1-grid cylinder, 2-support platform 1, 3-guide rod 1, 4-guide rod 2, 5-lifting chain 1, 6-lifting chain 2, 7-water inlet pipe, 8-grid plate, 9-aggregator body, 10-guide cavity, 11-air chamber cavity, 12-guide ring, 13-cleaning head, 14-lifting rod, 15-support component, 16-hydraulic cylinder, 17-pull rod, 18-cleaning part, 19-middle rail, 20-upstream rail, 21-downstream rail, 22-control block, 23-connecting rod 1, 24-connecting rod 2, 25-slot, 26-connecting rod 3, 27-cleaning rake, 28-static pressure level gauge, 29-housing, 30-partition, 31-air inlet, 32-purge port, 33-air inlet pipe, 34-limiting plate, 35-support platform 2, 36-purge pipe. DETAILED DESCRIPTION

[0032] This embodiment provides a pulse stirring sewage regulating tank, such as Figure 1-Figure 6As shown, from the upstream side to the downstream side, it includes a primary filtering unit, a secondary filtering unit and a plurality of pulse stirring devices. The primary filtering unit includes a liftable grille cylinder 1, the top of which is open and used to receive sewage entering the regulating tank. The side wall of the grille cylinder 1 is evenly and densely covered with through holes and used to filter sewage. The secondary filtering unit includes a grille plate 8, which is perpendicular to the horizontal central axis of the regulating tank and is used to filter sewage again.

[0033] The pulse stirring device includes a guide rod 3, a lifting chain 5 and a stirrer body 9. The stirrer body 9 is slidably connected to the guide rod 3, and the stirrer body 9 is lifted by the lifting chain 5. The stirrer body 9 includes a guide cavity 10 and an air chamber cavity 11 arranged side by side. The bottom of the guide cavity 10 is separated from the air chamber cavity 11. The bottom of the stirrer body 9 is open. The sewage enters the air chamber cavity 11 through the guide cavity 10. The top of the air chamber cavity 11 is connected to the air inlet pipe 33 for supplying air to the air chamber cavity 11. The gas can return to the regulating tank through the guide cavity 10 to form gas release and stir the water body.

[0034] Optionally, the regulating tank is a horizontal cylinder with a horizontal central axis. A water inlet pipe 7 is provided at the top of the upstream end of the regulating tank. The outlet end of the water inlet pipe 7 is above the screen tube 1. The part of the water inlet pipe 7 in the regulating tank is inclined downward, which is beneficial to increase the initial velocity of the water inlet and ensure that the sewage can flow smoothly into the screen tube 1 even when the water volume is small. For example, the inclination angle is 5-10 degrees.

[0035] Optionally, the primary filtration unit comprises a grille tube 1, a support platform 2 and at least one guide rod 4, the grille tube 1 is a vertical cylindrical shape with a closed bottom; the side of the support platform 2 is fixedly connected to the side of the upstream end of the regulating tank, and the upper surface of the support platform 2 can support the bottom of the grille tube 1, thereby limiting the lower limit position of the grille tube 1;

[0036] The guide rod 24 is vertically arranged, with the bottom end fixed on the upper surface of the support platform 2 and the top end passing through the regulating pool; a guide ring 12 is provided on the top of the outer side of the grille tube 1, and the guide ring 12 corresponds to the guide rod 24 one by one. The guide ring 12 is sleeved on the outer side of the guide rod 24 to play a positioning role, so that the grille tube 1 moves up and down along the guide rod 24.

[0037] Further optionally, the central axis of the grille tube 1 is vertical and is in the same vertical plane as the central axis of the regulating tank; the water outlet end of the water inlet pipe 7 is retractable, and when the grille tube 1 is raised or lowered, the water outlet end can shrink to avoid preventing the grille tube 1 from rising or falling.

[0038] Further optionally, the top of the grille tube 1 is connected to at least one lifting chain 26, the top of the lifting chain 26 passes through the regulating tank, and is then connected to an external fixed pulley and winch. The grille tube 1 is raised and lowered by winding and unwinding the lifting chain 26. When the grille tube 1 moves, the guide ring 12 is sleeved on the guide rod 24 to ensure that the grille tube 1 moves along the guide rod 24.

[0039] Preferably, the grille tube 1 is provided with two lifting chains 2, each lifting chain 2 is configured with a fixed pulley and a winch, and the two lifting chains 2 are raised and lowered synchronously to smoothly pull the grille tube 1 up and down.

[0040] An opening is provided at the top of the regulating tank corresponding to the position of the grille tube 1 and the second guide rod 4, allowing the grille tube 1, the lifting chain 2 6 and the second guide rod 4 to pass through the regulating tank, and a closable cover can also be provided at the opening.

[0041] The side wall of the liftable screen cylinder 1 of the present invention is uniformly and densely covered with oblong holes or circular holes, which are used as a coarse filter to intercept larger solid debris in sewage. When the intercepted debris fills the screen cylinder 1, the screen cylinder 1 can be lifted for cleaning. It is preferred to set two mutually parallel guide rods 2 and two guide rings, which are located on both sides of the screen cylinder and are opposite to each other, which is conducive to the smooth lifting and lowering of the screen cylinder.

[0042] When the screen cylinder 1 is filtering sewage, if solid debris covers the side of the cylinder, it will block the through holes on the side, making the filtering speed slower. If the water flow rate is not reduced, the sewage may overflow the screen cylinder 1. If the screen cylinder 1 is often lifted, not only the workload is increased, but also the working time is reduced. In order to solve the above problems, the present invention provides the following solutions.

[0043] Optionally, the primary filtering unit further includes a cleaning device, which includes a cleaning head 13 and a lifting rod 14. The cleaning head 13 is shaped like a triangular prism, and the cleaning head 13 has an arc in the transverse direction (i.e., in the horizontal direction), so that the cleaning head 13 is concentrically arranged with the grid tube 1; the longitudinal section of the cleaning head 13 is similar to a right triangle, one right-angled side is horizontal, the other right-angled side is vertical, and the side is a circular arc line protruding into the interior of the cleaning head 13;

[0044] The bottom of the lifting rod 14 is connected to the center of the horizontal top surface of the cleaning head 13, and the top of the lifting rod 14 extends out of the regulating tank. The lifting rod 14 can drive the cleaning head 13 to move up and down and left and right.

[0045] Since the cleaning head 13 is arranged concentrically with the grid tube 1, the vertical side of the cleaning head 13 can fit the inner wall of the grid tube 1. By controlling the lifting rod 14 outside the regulating tank, the cleaning head 13 can be controlled to move up and down and rotate along the inner wall of the grid tube 1. A liquid level gauge is arranged inside the grid tube 1. During normal filtration, the water intake of the grid tube 1 is equal to the filtered water output, and the liquid level in the grid tube 1 remains basically unchanged. When a certain part of the inner wall of the grid tube 1 is covered with solids (generally thin flakes or fibrous dirt in a mass), the liquid level in the grid tube 1 rises rapidly, and the cleaning head 13 can be controlled to clean the inner wall of the grid tube 1. The cleaning head 13 descends close to the inner wall of the grid tube 1, and the bottom edge of the cleaning head 13 can remove the dirt attached to the inner wall of the grid tube 1. Some of the dirt will be pressed by the cleaning head 13 to move its position and change its own attachment state; some of the dirt will move along the arc-shaped inclined side of the cleaning head 13, that is, from the inner wall of the grid tube 1, to the inside of the tube, and re-enter the sewage. The shape of the cleaning head 13 is not only convenient for cleaning dirt attached to the inner wall of the cylinder, but also not easy to be attached by dirt. By lifting the cleaning head 13 through the lifting rod 14, the cleaning head 13 is flushed downward by the hydraulic force, and the cleaning head 13 with a large top and a small bottom can be easily flushed clean. Even if a small amount of dirt is carried, it can be simply cleaned after the cleaning head 13 is lifted to the outside of the regulating tank.

[0046] Optionally, the secondary filtration unit includes a grille plate 8, a driving unit and a cleaning unit 18, the grille plate 8 is circular and evenly and densely covered with through holes, and the grille plate 8 is concentrically arranged with the regulating tank; the driving unit includes a supporting component 15, a hydraulic cylinder 16 and a pulling rod 17, the pulling rod 17 is vertically arranged and the top is connected to the telescopic end of the hydraulic cylinder 16, and the bottom is connected to the downstream side of the grille plate 8, the hydraulic cylinder 16 is arranged on the supporting component 15, and can move along the supporting component 15, and the supporting component 15 and the hydraulic cylinder 16 drive the grille plate 8 to rotate through the pulling rod 17;

[0047] One end of the cleaning portion 18 is connected to the supporting component 15, and the other end contacts the upstream side of the grid plate 8. The supporting component 15 drives the cleaning portion 18 to move, which can clean the dirt attached to the upstream side of the grid plate 8 and improve the filtering efficiency.

[0048] Further optionally, a circle of grooves is provided on the inner wall of the regulating tank at the position corresponding to the grid plate 8, and the edge of the grid plate 8 is clamped in the groove, thereby fixing the grid plate 8, so that the grid plate 8 can rotate around the central axis of the regulating tank;

[0049] On the upstream side of the grille plate 8, a circle of rubber gasket is provided on the edge of the grille plate 8. The rubber gasket is in a circular shape, with the outer side fixedly connected to the inner wall of the regulating tank and the inner side pointing to the central axis of the regulating tank; the upstream side of the rubber gasket welcomes the incoming water, and the downstream side is attached to the upstream side of the edge of the grille plate 8. The sheet-shaped rubber gasket blocks the incoming water from entering the groove in large quantities, thereby ensuring the smooth rotation of the grille plate 8.

[0050] The grid plate 8 covers the longitudinal section of the regulating tank. The sewage filtered by the grid tube 1 flows horizontally and is finely filtered through the grid plate 8 to intercept smaller solid debris. The grid plate 8 can rotate to prevent excessive dirt from sticking to the upstream side of the grid plate 8, thereby extending the cleaning cycle.

[0051] Further optionally, the support component 15 is located above the regulating tank, and includes a middle track 19, an upstream track 20 and a downstream track 21 which are horizontally arranged and parallel to each other, the middle track 19 is located directly above the grid plate 8 and is perpendicular to the central axis of the regulating tank, the downstream track 21 is located directly above the pulling rod 17, the hydraulic cylinder 16 is slidably connected to the downstream track 21, the upstream track 20 is located directly above the cleaning part 18, and the cleaning part 18 is slidably connected to the upstream track 20;

[0052] The control block 22 is slidably connected to the middle track 19, and the control block 22 is connected to the hydraulic cylinder 16 through a connecting rod 1 23, and the control block 22 is connected to the cleaning part 18 through a connecting rod 24, so that the control block 22 drives the hydraulic cylinder 16 and the cleaning part 18 to move synchronously.

[0053] The movement of the control block 22 on the middle track 19 can be electromagnetically controlled, and the movement of the hydraulic cylinder 16 on the downstream track 21 and the movement of the cleaning part 18 on the upstream track 20 can be directly driven by the control block 22 through the connecting rod 1 23 and the connecting rod 2 24 without an additional driving device, thereby saving energy consumption. Both ends of the middle track 19, the upstream track 20 and the downstream track 21 are supported by support columns, and the bottom of the support column can be supported on the side wall of the regulating tank or on the ground outside the regulating tank.

[0054] Further optionally, a groove 25 is provided at the top of the regulating tank corresponding to the positions of the upstream track 20 and the downstream track 21, and the inside of the regulating tank at the groove 25 is connected with the outside, so that the telescopic end of the hydraulic cylinder 16 and the traction rod can move back and forth along the corresponding groove 25, and the cleaning part 18 can move back and forth along the corresponding groove 25.

[0055] Further optionally, the pull rod 17 always remains in a vertical state, and the bottom end of the pull rod 17 is detachably connected to at least one through hole of the grille plate 8. The position where the bottom end of the pull rod 17 is connected to the grille plate 8 is on the radius of the grille plate 8. The straight-line distance from the center of the grille plate 8 to the bottom end of the pull rod 17 is reasonably designed according to the actual size of the grille plate 8 and the force required for the rotation of the grille plate 8.

[0056] The rotation of the grid plate 8 in the present invention abandons the traditional motor drive form, the motor is immersed in sewage, it is inconvenient to use and maintain, and the life is short. The present invention uses a mechanical drive form, that is, the control block 22 adjusts the horizontal position of the traction rod through the connecting rod 23 and the hydraulic cylinder 16, and the hydraulic cylinder 16 adjusts the vertical position of the traction rod. The two directions cooperate with each other, so that the bottom end of the traction rod moves in a circle with the center of the grid plate 8 as the center, thereby driving the grid plate 8 to rotate.

[0057] Further optionally, the cleaning part 18 includes a connecting rod 3 26 and a plurality of cleaning rakes 27, the connecting rod 3 26 is vertically arranged, the top end of the connecting rod 3 26 is slidably connected to the upstream track 20, and the bottom end is connected in parallel with a plurality of cleaning rakes 27; the cleaning rakes 27 can move back and forth along the length direction of the upstream track 20 to clean the dirt attached to the upstream side of the grille plate 8;

[0058] The cleaning rake 27 comprises a main rod and a plurality of rake teeth evenly distributed on the main rod. The rake teeth are horizontal or inclined and face the upstream side of the cleaning grid plate 8. The middle part of the main rod is connected to the bottom end of the connecting rod 3 26.

[0059] As a specific implementation method, the main rod is inclined, and several main rods are reasonably and evenly arranged on the upstream side of the grating plate 8. Since the moving range of the cleaning part 18 along the upstream track 20 is limited (need to cooperate with the movement of the traction rod), one cleaning rake 27 cannot clean the entire grating plate 8, so multiple cleaning rakes 27 are set. The main rod of the cleaning rake 27 has a certain inclination angle (but all are parallel to the upstream side), which is convenient for the reasonable arrangement of the positions of multiple cleaning rakes 27, so that the cleaning of the entire upstream side can be completed with a smaller moving range of the cleaning part 18, thereby extending the shutdown cleaning cycle of the grating plate 8.

[0060] Optionally, a static pressure level gauge 28 is provided on the upstream and downstream sides of the grid plate 8, respectively, for measuring the liquid level heights on both sides of the grid plate 8. When the grid plate 8 is blocked, the liquid level difference on both sides of the upstream and downstream will change. When the liquid level difference reaches a set value, an alarm connected to the static pressure level gauge 28 will sound an alarm, indicating that the grid plate 8 needs to be stopped for cleaning.

[0061] Optionally, the outer shell 29 of the agitator body 9 is in a cubic shape, the bottom of the outer shell 29 is open, the upper and middle part of the upstream side of the outer shell 29 is the upstream side of the guide cavity 10, the downstream side of the guide cavity 10 is the upstream side of the air chamber cavity 11, and the downstream side of the air chamber cavity 11 is the downstream side of the outer shell 29;

[0062] The top surface of the shell 29 covers the rear half of the top of the guide cavity 10 (i.e., the downstream side portion) and the top of the air chamber cavity 11. A partition plate 30 is provided between the upstream side and the downstream side of the guide cavity 10. One end of the top surface of the shell 29 is connected to the top of the partition plate 30, and the other end is connected to the downstream side of the shell 29, so that the front half of the top of the guide cavity 10 (i.e., the upstream side portion) is open, and the rear half of the top of the guide cavity 10 is connected to the top of the air chamber cavity 11.

[0063] An air inlet 31 is provided on the top surface of the housing 29 corresponding to the air chamber cavity 11 , for connecting to an air inlet pipe 33 .

[0064] The upstream side surface of the shell 29 faces the water inlet pipe 7, and the downstream side surface of the shell 29 faces the downstream end of the regulating tank.

[0065] The air inlet pipe 33 passes through the regulating tank and is then connected to an external air supply device. The air inlet pipe 33 is provided with a flow regulating valve for regulating the amount of air entering the air chamber cavity 11 and controlling the pulse operation time.

[0066] Further optionally, there is a gap between the bottom of the partition 30 and the bottom surface of the guide cavity 10, so that the internal space of the guide cavity 10 is divided into two areas by the partition 30 to form a baffle channel.

[0067] Further optionally, at least one limit plate 34 is provided on the outer side of the downstream side of the housing 29, and a through hole is provided on the limit plate 34, and the through hole is sleeved with the guide rod 3, and the lifting chain 5 is connected to the top surface of the housing 29, and when the lifting chain 5 lifts the agitator body 9, the agitator body 9 is lifted and lowered along the guide rod 3 through the limit plate 34;

[0068] The bottom of the guide rod 3 is connected to the bottom of the regulating tank, and the top of the guide rod 3 passes through the top of the regulating tank; an opening is provided at the top of the regulating tank corresponding to the position of the pulse stirring device, allowing the guide rod 3, the lifting chain 5 and the agitator body 9 to pass through the regulating tank, and a cover that can be opened and closed can also be provided at the opening.

[0069] Further optionally, a support platform 2 35 is provided at the bottom of the guide rod 1 3 for supporting the bottom of the downstream side of the outer shell 29 of the agitator body 9 .

[0070] Further optionally, the top end of the lifting chain 5 passes through the regulating tank and is then connected to an external fixed pulley and winch, and the lifting chain 5 is wound and unwound to achieve the rising and lowering of the agitator body 9.

[0071] The agitator body 9 of the present invention descends to the bottom of the regulating tank. In the initial state, the interior of the outer shell 29 is completely submerged in sewage, and the interiors of the guide cavity 10 and the air chamber cavity 11 are filled with sewage. When starting to work, the air inlet 31 begins to slowly take in air, and the upper part of the air chamber cavity 11 where the air inlet 31 is located is occupied by gas, and the upper part of the downstream area of ​​the guide cavity 10 is also occupied by gas. The liquid level of the air chamber cavity 11 and the liquid level of the downstream area of ​​the guide cavity 10 gradually decrease; when the liquid level drops to the lower edge of the partition 30, the gas will enter the upstream area of ​​the guide cavity 10 from the lower edge of the partition 30. At this time, the density of the gas-water mixture in the upstream area of ​​the guide cavity 10 becomes smaller, breaking the original pressure balance, and the downstream area of ​​the guide cavity 10 The high-pressure gas in the area quickly passes under the baffle 30 and moves toward the upstream area of ​​the guide chamber 10. At this time, the two sides of the baffle 30 are connected to form a siphon channel. Under the action of water pressure, the gas in the downstream area of ​​the guide chamber 10 is continuously and quickly released through the siphon channel. In a short period of time, a large amount of gas is released from the top opening of the guide chamber 10, gathered into large bubbles and quickly floated up, causing strong agitation to the water body, so that the sewage at the bottom of the regulating tank is lifted and the sewage at the top of the regulating tank is lowered, forming a water circulation, achieving the effect of stirring and homogenization.

[0072] The flow regulating valve of the air inlet pipe 33 controls the amount of gas entering the agitator body 9 and the pulse operation time to achieve an ideal pulse stirring effect, which has the effect of saving gas and strong stirring. Several pulse stirring devices are evenly arranged along the length direction of the central axis of the regulating tank.

[0073] Further optionally, a purge port 32 is provided at the bottom of the guide cavity 10, a purge pipe 36 is connected to the purge port 32 at the bottom end, and connected to an external air supply device at the top end, and a purge valve is provided on the purge pipe;

[0074] When the siphon channel is blocked, the purge valve is opened to guide the gas to the bottom of the guide cavity 10 (ie, below the partition 30 ) to dredge the area below the partition 30 .

[0075] Optionally, at least one sewage lifting pump is provided on the downstream side of the regulating tank to lift the sewage in the sewage regulating tank to the next process.

Claims

1. A pulse stirring sewage regulating tank, characterized in that: From the upstream side to the downstream side, it includes a primary filter unit, a secondary filter unit and several pulse stirring devices. The primary filter unit includes a liftable grille cylinder, the top of which is open to receive the sewage entering the regulating tank, and the side wall of the grille cylinder is evenly and densely covered with through holes to filter the sewage; the secondary filter unit includes a grille plate, which is perpendicular to the horizontal central axis of the regulating tank and is used to filter the sewage again; The pulse stirring device includes a guide rod, a lifting chain and a stirrer body. The stirrer body is slidably connected to the guide rod, and the stirrer body is lifted by the lifting chain. The stirrer body includes a guide cavity and an air chamber cavity arranged side by side. The bottom of the guide cavity is separated from the air chamber cavity. The bottom of the stirrer body is open. The sewage enters the air chamber cavity through the guide cavity. The top of the air chamber cavity is connected to an air inlet pipe for supplying air to the air chamber cavity. The gas can return to the regulating tank through the guide cavity, forming gas release to stir the water body.

2. The pulse stirring sewage regulating tank according to claim 1 is characterized in that: The regulating tank is a horizontal cylinder, with an inlet pipe on the top of the upstream end of the regulating tank. The outlet end of the inlet pipe is above the grid tube, and the part of the inlet pipe in the regulating tank is inclined downward, which is beneficial to increase the initial velocity of the water inlet.

3. The pulse stirring sewage regulating tank according to claim 1 is characterized in that: The primary filtering unit comprises a grille cylinder, a support platform 1 and at least one guide rod 2, the grille cylinder is a vertical cylindrical shape with a closed bottom; the side of the support platform 1 is fixedly connected to the side of the upstream end of the regulating tank, and the upper surface of the support platform 1 can support the bottom of the grille cylinder, thereby defining the lower limit position of the grille cylinder; The guide rod 2 is arranged vertically, with the bottom end fixed on the upper surface of the support platform 1 and the top end passing through the regulating pool; a guide ring is provided on the top of the outer side of the grille tube, and the guide ring corresponds to the guide rod 2 one by one. The guide ring is sleeved on the outer side of the guide rod 2 to play a positioning role, so that the grille tube moves up and down along the guide rod 2.

4. The pulse stirring sewage regulating tank according to claim 3 is characterized in that: The top of the grille cylinder is connected to at least one lifting chain 2, the top of the lifting chain 2 passes through the regulating tank and is then connected to an external fixed pulley and a winch. The grille cylinder is raised and lowered by winding and unwinding the lifting chain 2.

5. The pulse stirring sewage regulating tank according to claim 3 is characterized in that: The primary filter unit also includes a cleaning device, which includes a cleaning head and a lifting rod. The cleaning head is shaped like a triangular prism and has an arc in the horizontal direction, so that the cleaning head and the grid tube are arranged concentrically; the longitudinal section of the cleaning head is similar to a right triangle, one right angle side is horizontal, the other right angle side is vertical, and the side is a circular arc line protruding into the inside of the cleaning head; The bottom of the lifting rod is connected to the center of the top surface of the cleaning head, and the top of the lifting rod extends out of the regulating pool. The lifting rod can drive the cleaning head to move up and down and left and right.

6. The pulse stirring sewage regulating tank according to claim 1 is characterized in that: The secondary filtering unit comprises a grid plate, a driving part and a cleaning part. The grid plate is circular and evenly covered with through holes. The grid plate is concentrically arranged with the regulating tank. The driving part comprises a supporting component, a hydraulic cylinder and a pulling rod. The pulling rod is vertically arranged and the top is connected to the telescopic end of the hydraulic cylinder, and the bottom is connected to the downstream side of the grid plate. The hydraulic cylinder is arranged on the supporting component and can move along the supporting component. The supporting component and the hydraulic cylinder drive the grid plate to rotate through the pulling rod. One end of the cleaning part is connected to the supporting component, and the other end contacts the upstream side of the grid plate. The supporting component drives the cleaning part to move, which can clean the dirt attached to the upstream side of the grid plate and improve the filtering efficiency.

7. The pulse stirring sewage regulating tank according to claim 6 is characterized in that: The support component is located above the regulating tank, and includes a middle track, an upstream track and a downstream track that are horizontally arranged and parallel to each other. The middle track is located directly above the grid plate and is perpendicular to the central axis of the regulating tank. The downstream track is located directly above the pulling rod, and the hydraulic cylinder is slidably connected to the downstream track. The upstream track is located directly above the cleaning part, and the cleaning part is slidably connected to the upstream track. A control block is slidably connected on the middle track, the control block is connected to the hydraulic cylinder through a connecting rod 1, and the control block is connected to the cleaning part through a connecting rod 2, so that the control block drives the hydraulic cylinder and the cleaning part to move synchronously.

8. The pulse stirring sewage regulating tank according to claim 7 is characterized in that: A slot is provided at the top of the regulating tank at positions corresponding to the upstream track and the downstream track, and the inside of the regulating tank at the slot is connected to the outside, so that the telescopic end of the hydraulic cylinder and the traction rod can move back and forth along the corresponding slot, and the cleaning part can move back and forth along the corresponding slot; The pulling rod always keeps a vertical state, and the bottom end of the pulling rod is detachably connected to at least one through hole of the grid plate, and the position where the bottom end of the pulling rod is connected to the grid plate is on the radius of the grid plate.

9. The pulse stirring sewage regulating tank according to claim 1, characterized in that: The outer shell of the agitator body is in a cubic shape, the bottom of the outer shell is open, the upper middle part of the upstream side of the outer shell is the upstream side of the guide cavity, the downstream side of the guide cavity is the upstream side of the air chamber cavity, and the downstream side of the air chamber cavity is the downstream side of the outer shell; The top surface of the shell covers the rear half of the top of the guide cavity and the top of the air chamber cavity. A partition is provided between the upstream side surface and the downstream side surface of the guide cavity. One end of the top surface of the shell is connected to the top of the partition, and the other end is connected to the downstream side surface of the shell, so that the front half of the top of the guide cavity is open, and the rear half of the top of the guide cavity is connected to the top of the air chamber cavity. An air inlet is arranged on the top surface of the shell corresponding to the air chamber cavity, and is used for connecting an air inlet pipe.

10. The pulse stirring sewage regulating tank according to claim 9, characterized in that: There is a gap between the bottom of the partition and the bottom surface of the guide cavity, so that the internal space of the guide cavity is divided into two areas by the partition to form a baffle channel; At least one limit plate is provided on the outside of the downstream side of the shell, and a through hole is provided on the limit plate, and the through hole is connected to a guide rod 1, and a lifting chain 1 is connected to the top surface of the shell. When the lifting chain 1 lifts the agitator body, the agitator body is lifted and lowered along the guide rod 1 through the limit plate.

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