Staged sewage treatment tank capable of scraping sludge

Abstract

The invention discloses a staged sewage treatment box capable of scraping sludge, and relates to the technical field of sewage treatment.The staged sewage treatment box comprises a mixing box, a flow guide box is fixedly installed at the top of the mixing box, a filtering box is fixedly installed at the top end of the flow guide box, and a positioning frame is movably installed in the filtering box; a fixing cover is fixedly installed on the rear side of the top of the positioning frame, and a filtering plate is installed at the bottom of the positioning frame. Large-particle impurities before sewage treatment can be filtered out through the positioning frame and the filter plate, the situation that the large-particle impurities enter the sewage treatment box to affect the sewage treatment effect is avoided, the mixing stirring mechanism is matched with the intermittent chemical injection mechanism, the mixing uniformity between sewage and chemicals can be improved, the sewage treatment effect is improved, and the sewage treatment efficiency is improved. Wherein the arrangement of the transmission discharging mechanism is convenient to cooperate with the mixing and stirring mechanism for sealing during treatment and starting for discharging after treatment, and the structural linkage among sewage mixing, medicament adding and discharging procedures is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a graded sewage treatment box capable of scraping sludge. Background Art

[0002] A large amount of sewage is generated in the daily operation process of various fields such as construction, agriculture, chemical industry, environmental protection, medical treatment, and catering. These sewage can be roughly divided into two categories: domestic sewage and industrial sewage. Sewage is a mixture of various organic and inorganic substances. Direct discharge will pollute the environment and reduce the environmental protection effect. Therefore, it is necessary to treat the sewage in a sewage treatment tank and then go through multiple treatment processes before discharge, which can effectively reduce environmental pollution and improve the safety of sewage discharge.

[0003] However, the existing sewage treatment tank still has certain defects when in use; As proposed in the application number CN202311342013.2, a graded sewage treatment tank capable of scraping off sludge comprises: a sewage tank body, an upper end of which is provided with a mounting frame; an extrusion plate, which is arranged on the inner side of the sewage tank body, a lifting mechanism is arranged on the inner side of the mounting plate, and a limiting rod is installed on the rear and right sides of the lifting mechanism, the lifting mechanism comprises a first adjusting rod, a fixing rod and a second adjusting rod, an extension positioning mechanism is installed on the lower end of the limiting rod, and the extension positioning mechanism comprises a positioning rod, a third adjusting rod, an adjusting ring, a connecting rod, a positioning frame and a positioning block; a scraper plate, which is installed on the outer side of the extrusion plate, the graded sewage treatment tank capable of scraping off sludge can perform graded treatment on sewage to avoid possible reactions between different pollutants and affect the sewage treatment effect, and can scrape off the sludge that may adhere to the treatment tank to avoid residual and affect the next sewage treatment. In actual use, the following problems still exist: The hierarchical sewage treatment tank injects liquid medicine into the sewage inside the sewage tank body through the injection pipe, and such injection method easily leads to uneven mixing of the medicine and the sewage, thereby reducing the uniformity and effect of sewage treatment; When sewage is treated by the graded sewage treatment tank, large particle impurities in the sewage will enter the interior of the sewage tank along with the sewage, and the large particle impurities will affect the effect of subsequent separation of sludge in the sewage.

[0004] In view of this, we conducted in-depth research on the above issues, which led to the present case.

[0005] In view of the above problems, an innovative design was carried out based on the original graded sewage treatment tank that can scrape off the sludge. Summary of the invention

[0006] The object of the present invention is to provide a graded sewage treatment tank capable of scraping off sludge, so as to solve the problems in the above background technology that it is inconvenient to separate large particle impurities in sewage and the injection uniformity is reduced.

[0007] To achieve the above object, the present invention provides the following technical solution: a hierarchical sewage treatment tank capable of scraping sludge, comprising a mixing tank, A guide box is fixedly installed on the top of the mixing box, a filter box is fixedly installed on the top of the guide box, a positioning frame is movably installed inside the filter box, a fixed cover is fixedly installed on the top rear side of the positioning frame, and a filter plate is installed on the bottom of the positioning frame; The top of the fixed cover is connected with a mixing and stirring mechanism; An intermittent drug injection mechanism is also installed on the top of the fixed cover, and the intermittent drug injection mechanism is linked with the mixing and stirring mechanism; A positioning connection mechanism is connected between the fixed cover and the filter box; A discharge box is fixedly installed at the bottom end of the mixing box, a discharge pipe is installed at the bottom of the discharge box, and support legs are fixedly installed at equal angles on the outer circle of the discharge box; A transmission discharging mechanism is installed inside the discharge pipe.

[0008] Preferably, the mixing and stirring mechanism includes a transmission rod that slides through the middle of the filter plate, a central seat is symmetrically installed on the bottom of the transmission rod, and stirring blades are installed at equal angles on the outer ring of the central seat, and two groups of support rods are symmetrically installed on the outer ring of the transmission rod in the middle of the central seat, and the outer end of the support rod is fixedly connected with a scraper plate, and the scraper plate is arranged obliquely, and the outer side of the scraper plate is slidably connected to the inner wall of the mixing box, and a positioning shaft seat is fixedly connected to the inner side of the top of the mixing box, and the middle part of the positioning shaft seat is rotatably connected to the transmission rod.

[0009] Preferably, the mixing and stirring mechanism also includes a key block installed at an equal angle on the top of the transmission rod, the outer ring of the key block is movably keyed and connected to a transmission gear, the bottom of the transmission gear is connected to a connecting shaft, the connecting shaft is engaged and connected to a fixed cover, the rear side of the transmission gear is parallelly meshed and connected to a driving gear, the middle part of the driving gear is connected to a servo motor, and the servo motor is fixedly connected to the fixed cover through a mounting plate.

[0010] By adopting the above technical scheme, it is convenient to use the mixing and stirring mechanism to mix and stir the sewage inside the mixing box, so that the sewage can be evenly mixed with the added agent during the stirring process, so that the agent can effectively treat the sewage evenly, thereby improving the sewage treatment uniformity and effect of the graded sewage treatment box. The setting of the scraper can effectively scrape off the sludge adhered to the inner wall of the mixing box during rotation, avoiding the problem of sludge adhesion causing a decrease in sewage treatment effect.

[0011] Preferably, the intermittent drug injection mechanism includes a piston sleeve symmetrically arranged on the top of the fixed cover, the piston sleeve is fixedly connected to the fixed cover through a mounting plate, a sealed bearing is embedded in the top of the piston sleeve, a reciprocating screw is fixedly connected to the inner ring of the sealed bearing, a piston plate is provided on the outer ring of the reciprocating screw, and a driven gear is fixedly installed on the bottom end of the reciprocating screw.

[0012] Preferably, the reciprocating screw drives the piston plate to reciprocate and rise and fall inside the piston sleeve, and the driven gear is parallelly meshed with the transmission gear.

[0013] Preferably, the intermittent drug injection mechanism also includes a liquid inlet valve embedded in the rear side of the top of the piston sleeve, the rear end of the liquid inlet valve is fixedly connected to the liquid inlet pipe, and a liquid outlet valve is embedded in the inner top of the piston sleeve, the liquid outlet end of the liquid outlet valve is fixedly connected to the liquid outlet pipe, and the inner ends of the liquid outlet pipes on both sides are fixedly connected to the collecting pipes.

[0014] Preferably, the intermittent drug injection mechanism also includes a fixed shaft fixedly sleeved on the bottom end of the collecting pipe, the bottom of the outer ring of the fixed shaft is fixedly connected to a threaded sleeve, the threaded sleeve is rotatably connected to the bottom end of the collecting pipe through the fixed shaft, a connecting pipe is inlaid and installed inside the transmission rod, the top of the connecting pipe is fixedly connected to a threaded connecting seat, the threaded connecting seat is threadedly connected to the threaded sleeve, a diverter pipe is inlaid and installed inside the stirring blade, the outer ring of the diverter pipe is symmetrically and evenly connected to a nozzle seat, the nozzle seat is engaged with the stirring blade, and the inner end of the diverter pipe is communicated with the connecting pipe.

[0015] By adopting the above technical scheme, it is convenient to utilize the driving rotation of the mixing and stirring mechanism to drive the intermittent injection mechanism to perform piston movement, so that the intermittent injection mechanism can intermittently extract the external sewage treatment agent during the piston movement, and can intermittently discharge the extracted agent. When discharging, the stirring blades can be set at equal angles to add liquid medicine from the inside of the sewage, and then the sewage can be stirred by the stirring blades, which can effectively avoid the phenomenon of uneven mixing of the agent and the sewage, and further improve the sewage treatment effect of the graded sewage treatment tank.

[0016] Preferably, the positioning connection mechanism includes an adjusting screw rotatably installed inside the fixed cover, the threads at both ends of the adjusting screw are opened in opposite directions, knobs are fixedly installed at both ends of the adjusting screw, and the threads at both ends of the adjusting screw are sleeved with locking plates, and the inside of the locking plate slides symmetrically through a limit rod, the inner end of the limit rod is fixedly connected to the fixed cover, and locking grooves are opened on both sides of the filter box, and the locking grooves are movably locked with the locking plates.

[0017] By adopting the above technical scheme, it is convenient to achieve the engagement and separation of the positioning connection mechanism by adjusting the positioning connection mechanism, which is beneficial to firmly install the fixing cover, the positioning frame and the filter plate when engaging, so that the filter plate can effectively filter out large particles of impurities in the sewage, and can be easily disassembled when separating, so that the large particles of impurities inside the positioning frame can be easily cleaned, thereby improving the sewage pretreatment effect of the graded sewage treatment tank.

[0018] Preferably, the transmission discharging mechanism includes a connecting rod that passes through and is rotatably installed at the bottom of the discharge pipe, the top end of the connecting rod is fixedly sleeved with an inner rotating seat, a limiting seat is fixedly installed inside one side of the inner rotating seat, a ratchet is rotatably installed inside the limiting seat, a spring is fixedly connected between the ratchet and the side wall of the inner rotating seat, the ratchet forms an elastic reset structure with the inner rotating seat through the spring and the limiting seat, the upper and lower outer rings of the inner rotating seat are rotatably connected with an outer sleeve seat, the inner part of the outer sleeve seat is provided with a tooth groove, and the tooth groove is movably engaged with the ratchet.

[0019] Preferably, the transmission discharging mechanism also includes a driving screw fixedly mounted on the bottom end of the connecting rod, the outer circle threaded sleeve of the driving screw is provided with a lifting seat, the front end of the lifting seat is fixedly mounted with a lifting rod, the lifting rod is slidably connected to the bottom of the discharge pipe, the top end of the lifting rod is fixedly connected with a sealing plug, and the middle part of the sealing plug is slidably connected to the connecting rod.

[0020] By adopting the above technical scheme, the mixing and stirring mechanism can evenly stir and mix the sewage and chemicals inside the mixing box when rotating counterclockwise, and cannot drive the transmission discharge mechanism to ensure the closed state of the discharge pipe. However, the mixing and stirring mechanism can drive the transmission discharge mechanism to move and realize the opening of the top of the discharge pipe when rotating clockwise, which facilitates the discharge of treated sewage and improves the structural linkage between the discharge process and the mixing and stirring process.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the hierarchical sewage treatment box capable of scraping off sludge can filter out large particle impurities before sewage treatment through the positioning frame and the filter plate, thereby preventing large particle impurities from entering the sewage treatment box and affecting the sewage treatment effect, and the mixing and stirring mechanism cooperates with the intermittent drug injection mechanism to improve the mixing uniformity between sewage and the agent, thereby improving the sewage treatment effect, wherein the transmission discharging mechanism is arranged to facilitate the sealing during treatment with the mixing and stirring mechanism and the opening and discharging after treatment, thereby improving the structural linkage between sewage mixing, agent addition and discharging processes, and the specific structure is as follows: The setting of the mixing and stirring mechanism can effectively stir and mix the sewage inside the mixing box, and then can stir and evenly mix the added agent and the sewage, which is conducive to full contact between the agent and the sewage, and improves the treatment uniformity and effect of the agent on the sewage. At the same time, the mixing and stirring mechanism can also effectively scrape off the sludge adhering to the inner wall of the mixing box when rotating; The mixing and stirring mechanism can also be linked to drive the intermittent injection mechanism to perform piston movement when rotating, so that the intermittent injection mechanism can intermittently extract the external sewage treatment agent during the piston movement, and can intermittently discharge the extracted agent. In conjunction with the mixing and stirring mechanism, the agent can be added from the inside of the sewage during the mixing process, further improving the mixing uniformity and treatment effect of the agent and sewage; The setting of the positioning connection mechanism facilitates the snap-fit ​​connection and separation between the fixed cover and the filter box, which is conducive to the stable installation of the positioning frame and the filter plate during the snap-fit ​​connection to filter out large particles in the sewage, and is also conducive to taking out the positioning frame and the filter plate during separation to clean up the large particles of impurities inside, thereby improving the convenience of the cleaning operation; The mixing and stirring mechanism can achieve mixing and stirring when it rotates counterclockwise, and will not drive the transmission discharging mechanism to rotate to ensure the closed seal of the top of the discharge pipe. When the mixing and stirring mechanism rotates clockwise, it will drive the transmission discharging mechanism to operate and realize the opening of the top of the discharge pipe, thereby discharging the treated sewage, thereby improving the structural linkage between the drainage process and the mixing and stirring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the side cross-section structure of the mixing box, the guide box and the filter box of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the positioning frame and the filter box of the present invention; Figure 4 It is a schematic diagram of the transmission structure of the mixing and stirring mechanism and the intermittent injection mechanism of the present invention; Figure 5 It is a schematic diagram of the connection structure of the mixing and stirring mechanism and the intermittent injection mechanism of the present invention; Figure 6 It is a schematic diagram of the exploded structure of the threaded sleeve and the threaded connection seat of the present invention; Figure 7 It is a schematic diagram of the side section structure of the intermittent injection mechanism of the present invention; Figure 8 It is a schematic diagram of the connection structure between the positioning connection mechanism and the fixed cover of the present invention; Fig. 9 It is a schematic diagram of the side cross-section structure of the discharge box and the discharge pipe of the present invention; Fig.10 It is a schematic diagram of the side section structure of the transmission discharging mechanism of the present invention.

[0023] In the figure: 1, mixing box; 2, guide box; 3, filter box; 4, positioning frame; 5, fixed cover; 6, filter plate; 7, transmission rod; 8, central seat; 9, stirring blade; 10, support rod; 11, scraper; 12, positioning shaft seat; 13, key block; 14, transmission gear; 15, connecting shaft; 16, driving gear; 17, servo motor; 18, piston sleeve; 19, sealed bearing; 20, reciprocating screw; 21, piston plate; 22, driven gear; 23, liquid inlet valve; 24, liquid inlet pipe; 25, liquid outlet valve; 26, liquid outlet pipe ; 27. Collecting pipe; 28. Fixed shaft; 29. ​​Threaded sleeve; 30. Connecting pipe; 31. Threaded connecting seat; 32. Diverter pipe; 33. Nozzle seat; 34. Adjusting screw; 35. Knob; 36. Clamping plate; 37. Limit rod; 38. Clamping groove; 39. Discharge box; 40. Discharge pipe; 41. Support leg; 42. Connecting rod; 43. Inner swivel seat; 44. Limit seat; 45. Ratchet; 46. Spring; 47. Outer sleeve seat; 48. Tooth groove; 49. Driving screw; 50. Lifting seat; 51. Lifting rod; 52. Sealing plug. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-10The present invention provides a technical solution: a hierarchical sewage treatment box capable of scraping sludge, comprising a mixing box 1, a guide box 2 is fixedly mounted on the top of the mixing box 1, a filter box 3 is fixedly mounted on the top of the guide box 2, a positioning frame 4 is movably mounted inside the filter box 3, a fixed cover 5 is fixedly mounted on the top rear side of the positioning frame 4, a filter plate 6 is mounted on the bottom of the positioning frame 4, a positioning connection mechanism is connected between the fixed cover 5 and the filter box 3, the positioning connection mechanism comprises an adjusting screw 34 rotatably mounted inside the fixing cover 5, threads at both ends of the adjusting screw 34 are opened in opposite directions, knobs 35 are fixedly mounted on both ends of the adjusting screw 34, and clamping plates 36 are threadedly sleeved on both ends of the adjusting screw 34, and the internal symmetrical sliding of the clamping plate 36 penetrates a limiting rod 37, the inner end of the limiting rod 37 is fixedly connected to the fixing cover 5, and clamping grooves 38 are opened on both sides of the filter box 3, and the clamping grooves 38 are movably clamped and connected with the clamping plates 36; The design of the above structure enables the filter plate 6 at the bottom of the positioning frame 4 to filter out large particles of impurities in the sewage when the sewage is transported to the positioning frame 4 inside the filter box 3, and the filtered sewage will enter the interior of the mixing box 1 through the diversion of the diversion box 2. When it is necessary to clean the large particles of impurities inside the positioning frame 4, first, the threaded sleeve 29 is rotated to separate it from the threaded connection seat 31, and then the adjusting screw 34 is driven to rotate by the reverse rotation of the knob 35, so that the adjusting screw 34 uses the reverse opening of the threads at both ends to drive the clamping plates 36 at both ends to move in the opposite direction, so that the clamping plates 36 can slide on the limiting rod 37 to release the clamping. The plate 36 is engaged with the engaging groove 38. At this time, by lifting the fixed cover 5, the fixed cover 5 cooperates with the connecting shaft 15 to drive the transmission gear 14 to separate from the key block 13, thereby completing the disassembly of the positioning frame 4 and the fixed cover 5, so as to facilitate the cleaning of large particles of impurities inside the positioning frame 4. During installation, the positioning frame 4 is inserted into the interior of the filter box 3, which will drive the transmission gear 14 to be keyed and connected with the key block 13, and then the threaded sleeve 29 is connected with the threaded connection seat 31, and then the adjusting screw 34 is driven to rotate forward by rotating the knob 35, and the engaging plates 36 at both ends are driven to move toward each other and engage with the engaging grooves 38, thereby realizing the relative positioning between the fixed cover 5 and the filter box 3.

[0026] The top of the fixed cover 5 is connected with a mixing and stirring mechanism, which includes a transmission rod 7 that slides through the middle of the filter plate 6, a central seat 8 is symmetrically installed at the bottom of the transmission rod 7, and a stirring blade 9 is installed at an equal angle on the outer ring of the central seat 8. The outer ring of the transmission rod 7 in the middle of the two groups of central seats 8 is symmetrically installed with a support rod 10, and the outer end of the support rod 10 is fixedly connected with a scraper plate 11, which is arranged obliquely, and the outer side of the scraper plate 11 is slidably connected to the inner wall of the mixing box 1, and the top inner side of the mixing box 1 is fixedly connected with a fixed The middle part of the positioning shaft seat 12 is connected to the transmission rod 7 for positioning and rotation. The mixing and stirring mechanism also includes a key block 13 installed at an equal angle on the top of the transmission rod 7. The outer ring of the key block 13 is movably keyed to a transmission gear 14. The bottom of the transmission gear 14 is connected to a connecting shaft 15. The connecting shaft 15 is engaged with the fixed cover 5. The rear side of the transmission gear 14 is connected to a driving gear 16 in parallel and meshing. The middle part of the driving gear 16 is connected to a servo motor 17. The servo motor 17 is fixedly connected to the fixed cover 5 through a mounting plate. The design of the above structure enables the driving gear 16 to rotate by controlling the servo motor 17, and then the driving gear 16 can drive the transmission gear 14 to rotate in cooperation with the connecting shaft 15 by meshing connection with the transmission gear 14, and then the transmission gear 14 drives the transmission rod 7 to rotate in the middle of the positioning shaft seat 12 by keying connection with the keying block 13, and then the transmission rod 7 can drive the bottom central seat 8 and the stirring blade 9 to rotate when rotating, so that the stirring blade 9 can stir the sewage inside the mixing box 1 when rotating, and at the same time, the rotation of the transmission rod 7 will also cooperate with the support rod 10 to drive the scraper plate 11 to rotate, and then the scraper plate 11 can scrape the sludge adhered to the inner wall of the mixing box 1 by fitting with the mixing box 1 when rotating, and the oblique setting of the scraper plate 11 can transmit the scraped sludge downward. It should be noted here that the transmission rod 7, the stirring blade 9 and the scraper plate 11 can rotate clockwise and counterclockwise, and counterclockwise rotation is used for stirring and mixing and sludge scraping.

[0027] An intermittent drug injection mechanism is also installed on the top of the fixed cover 5, and the intermittent drug injection mechanism is linked with the mixing and stirring mechanism. The intermittent drug injection mechanism includes a piston sleeve 18 symmetrically arranged on the top of the fixed cover 5, and the piston sleeve 18 is fixedly connected to the fixed cover 5 through a mounting plate. A sealed bearing 19 is inlaid on the top of the piston sleeve 18, and a reciprocating screw 20 is fixedly connected to the inner ring of the sealed bearing 19. A piston plate 21 is sleeved on the outer ring of the reciprocating screw 20. The reciprocating screw 20 drives the piston plate 21 to reciprocate and rise and fall inside the piston sleeve 18. A driven gear 22 is fixedly installed at the bottom end of the reciprocating screw 20, and the driven gear 22 is parallelly meshed and connected with the transmission gear 14. The intermittent drug injection mechanism also includes a liquid inlet valve 23 inlaid on the rear side of the top of the piston sleeve 18, and the rear end of the liquid inlet valve 23 is fixedly connected to a liquid inlet pipe 24. The piston sleeve 1 8 is inlaid with a liquid outlet valve 25 at the top of the inner side, and the liquid outlet end of the liquid outlet valve 25 is fixedly connected with a liquid outlet pipe 26, and the inner ends of the liquid outlet pipes 26 on both sides are fixedly connected with a collecting pipe 27. The intermittent drug injection mechanism also includes a fixed shaft 28 fixedly sleeved on the bottom end of the collecting pipe 27, and the outer ring bottom of the fixed shaft 28 is fixedly connected with a threaded sleeve seat 29, and the threaded sleeve seat 29 is rotatably connected to the bottom end of the collecting pipe 27 through the fixed shaft 28. A connecting pipe 30 is inlaid with the inside of the transmission rod 7, and a threaded connection seat 31 is fixedly connected to the top of the connecting pipe 30, and the threaded connection seat 31 is threadedly connected to the threaded sleeve seat 29. A shunt pipe 32 is inlaid with the inside of the stirring blade 9, and a nozzle seat 33 is symmetrically and evenly spaced on the outer ring of the shunt pipe 32. The nozzle seat 33 is connected in an inlaid manner with the stirring blade 9, and the inner end of the shunt pipe 32 is connected to the connecting pipe 30; The design of the above structure enables the transmission gear 14 to drive the parallel meshing driven gear 22 to rotate when it is driven to rotate, and then the driven gear 22 will drive the reciprocating screw 20 to cooperate with the sealed bearing 19 to rotate inside the piston sleeve 18, and drive the piston plate 21 to reciprocate when rotating. When the piston plate 21 descends, the external sewage treatment agent will be extracted through the liquid inlet valve 23 and the liquid inlet pipe 24 and stored in the piston sleeve 18. When the piston plate 21 rises, the stored sewage treatment agent will be discharged to the inside of the collecting pipe 27 through the liquid outlet valve 25 and the liquid outlet pipe 26. Then the agent inside the collecting pipe 27 will be transported to the inside of the connecting pipe 30, and will be diverted through the diverter pipe 32 and sprayed out through the nozzle seat 33, so that the agent can be released from the inside of the sewage. In combination with the stirring of the sewage by the rotating stirring blade 9, it is beneficial to evenly mix the sewage in the stirring and the released agent, thereby improving the sewage treatment effect.

[0028] A discharge box 39 is fixedly installed at the bottom end of the mixing box 1, a discharge pipe 40 is installed at the bottom of the discharge box 39, and a support leg 41 is fixedly installed at an equal angle on the outer circle of the discharge box 39. A transmission discharge mechanism is installed inside the discharge pipe 40, and the transmission discharge mechanism includes a connecting rod 42 that is rotatably installed at the bottom of the discharge pipe 40, and an inner rotating seat 43 is fixedly sleeved on the top of the connecting rod 42. A limit seat 44 is fixedly installed inside one side of the inner rotating seat 43, and a ratchet 45 is rotatably installed inside the limit seat 44. A spring 46 is fixedly connected between the ratchet 45 and the side wall of the inner rotating seat 43, and the ratchet 45 is connected to the inner rotating seat 43 through the spring 46 and the limit seat. The seat 44 and the inner rotating seat 43 form an elastic reset structure. The outer rings of the upper and lower ends of the inner rotating seat 43 are rotatably connected with the outer sleeve seat 47. The inner portion of the outer sleeve seat 47 is provided with tooth grooves 48, and the tooth grooves 48 are movably engaged with the ratchet 45. The transmission discharging mechanism also includes a driving screw 49 fixedly mounted on the bottom end of the connecting rod 42. The outer ring thread sleeve of the driving screw 49 is provided with a lifting seat 50. The front end of the lifting seat 50 is fixedly mounted with a lifting rod 51. The lifting rod 51 is slidably connected to the bottom of the discharge pipe 40. The top of the lifting rod 51 is fixedly connected with a sealing plug 52. The middle part of the sealing plug 52 is slidably connected to the connecting rod 42. The design of the above structure makes it possible for the transmission rod 7 to rotate counterclockwise, which will drive the outer sleeve seat 47 and the tooth groove 48 at the bottom to rotate counterclockwise. Then, when the tooth groove 48 rotates counterclockwise, the ratchet 45 will cooperate with the limit seat 44 and the spring 46 to shrink, so that the rotation of the outer sleeve seat 47 cannot drive the inner rotating seat 43 to rotate. At this time, the sealing plug 52 fits with the top of the discharge pipe 40 to ensure sealing. When the sewage treatment is completed, the transmission rod 7 is controlled to rotate clockwise. At this time, the inner rotating seat 43 can drive the inner rotating seat 43 to rotate by engaging with the ratchet 45, and then the inner rotating seat 43 drives the connecting rod 42 to rotate, and then the connecting rod 42 drives the driving screw 49 at the bottom to rotate, so that the driving screw 49 drives the lifting seat 50 to rise during rotation, and then the lifting seat 50 drives the lifting rod 51 and the sealing plug 52 to rise. At this time, the sealing plug 52 is separated from the top of the discharge pipe 40 to facilitate the discharge of the treated sewage through the discharge pipe 40. When the sewage needs to be treated again, the driving screw 49 can be rotated to drive the lifting seat 50, the lifting rod 51 and the sealing plug 52 to descend and reset, thereby achieving the closure of the top of the discharge pipe 40.

[0029] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hierarchical sewage treatment tank capable of scraping sludge, comprising a mixing tank (1), characterized in that: A flow guide box (2) is fixedly mounted on the top of the mixing box (1), a filter box (3) is fixedly mounted on the top of the flow guide box (2), a positioning frame (4) is movably mounted inside the filter box (3), a fixed cover (5) is fixedly mounted on the top rear side of the positioning frame (4), and a filter plate (6) is mounted on the bottom of the positioning frame (4); The top of the fixed cover (5) is connected with a mixing and stirring mechanism; An intermittent drug injection mechanism is also installed on the top of the fixed cover (5), and the intermittent drug injection mechanism is linked with the mixing and stirring mechanism; A positioning connection mechanism is connected between the fixed cover (5) and the filter box (3); A discharge box (39) is fixedly mounted at the bottom end of the mixing box (1), a discharge pipe (40) is mounted at the bottom of the discharge box (39), and support legs (41) are fixedly mounted at equal angles on the outer ring of the discharge box (39); A transmission discharging mechanism is installed inside the discharge pipe (40).

2. A hierarchical sewage treatment tank capable of scraping off sludge according to claim 1, characterized in that: The mixing and stirring mechanism comprises a transmission rod (7) which slides through the middle of the filter plate (6); a central seat (8) is symmetrically mounted on the bottom of the transmission rod (7); stirring blades (9) are mounted at equal angles on the outer ring of the central seat (8); support rods (10) are symmetrically mounted on the outer ring of the transmission rod (7) in the middle of two groups of central seats (8); a scraper plate (11) is fixedly connected to the outer end of the support rod (10); the scraper plate (11) is arranged obliquely; the outer side of the scraper plate (11) is slidably connected to the inner wall of the mixing box (1); a positioning shaft seat (12) is fixedly connected to the inner side of the top of the mixing box (1); and the middle part of the positioning shaft seat (12) is connected to the transmission rod (7) in a positioning and rotatable manner.

3. A hierarchical sewage treatment tank capable of scraping off sludge according to claim 2, characterized in that: The mixing and stirring mechanism further comprises a key block (13) mounted at an equal angle on the top end of the transmission rod (7); the outer ring of the key block (13) is movably keyed to a transmission gear (14); the bottom of the transmission gear (14) is connected to a connecting shaft (15); the connecting shaft (15) is engaged with the fixed cover (5); the rear side of the transmission gear (14) is parallelly meshed with a driving gear (16); the middle of the driving gear (16) is connected to a servo motor (17); the servo motor (17) is fixedly connected to the fixed cover (5) via a mounting plate.

4. A hierarchical sewage treatment tank capable of scraping off sludge according to claim 3, characterized in that: The intermittent drug injection mechanism comprises a piston sleeve (18) symmetrically arranged on the top of a fixed cover (5), the piston sleeve (18) being fixedly connected to the fixed cover (5) via a mounting plate, a sealed bearing (19) being embedded and mounted on the top of the piston sleeve (18), a reciprocating screw (20) being fixedly connected to the inner ring of the sealed bearing (19), a piston plate (21) being sleeved on the outer ring of the reciprocating screw (20), and a driven gear (22) being fixedly mounted on the bottom end of the reciprocating screw (20).

5. A hierarchical sewage treatment tank capable of scraping off sludge according to claim 4, characterized in that: The reciprocating screw (20) drives the piston plate (21) to rise and fall reciprocatingly inside the piston sleeve (18), and the driven gear (22) is meshedly connected with the transmission gear (14) in parallel.

6. A hierarchical sewage treatment tank capable of scraping off sludge according to claim 4, characterized in that: The intermittent drug injection mechanism further comprises a liquid inlet valve (23) mounted on the rear side of the top of the piston sleeve (18), the rear end of the liquid inlet valve (23) being fixedly connected to a liquid inlet pipe (24), a liquid outlet valve (25) mounted on the inner top of the piston sleeve (18), the liquid outlet end of the liquid outlet valve (25) being fixedly connected to a liquid outlet pipe (26), and the inner ends of the liquid outlet pipes (26) on both sides being fixedly connected to collecting pipes (27).

7. A graded sewage treatment tank capable of scraping off sludge according to claim 6, characterized in that: The intermittent drug injection mechanism further comprises a fixed shaft (28) fixedly sleeved on the bottom end of the collecting pipe (27); a threaded sleeve (29) is fixedly connected to the bottom of the outer ring of the fixed shaft (28); the threaded sleeve (29) is rotatably connected to the bottom end of the collecting pipe (27) through the fixed shaft (28); a connecting pipe (30) is embedded and installed inside the transmission rod (7); a threaded connecting seat (31) is fixedly connected to the top end of the connecting pipe (30); the threaded connecting seat (31) is threadedly connected to the threaded sleeve (29); a shunt pipe (32) is embedded and installed inside the stirring blade (9); a nozzle seat (33) is symmetrically and evenly spaced on the outer ring of the shunt pipe (32); the nozzle seat (33) is engaged and connected to the stirring blade (9); and the inner end of the shunt pipe (32) is connected to the connecting pipe (30).

8. The hierarchical sewage treatment tank capable of scraping off sludge according to claim 1 is characterized in that: The positioning connection mechanism comprises an adjusting screw (34) rotatably mounted inside the fixed cover (5), the threads at both ends of the adjusting screw (34) being opened in opposite directions, knobs (35) being fixedly mounted on both ends of the adjusting screw (34), engaging plates (36) being threaded sleeves at both ends of the adjusting screw (34), a limiting rod (37) symmetrically slidingly penetrated inside the engaging plate (36), the inner end of the limiting rod (37) being fixedly connected to the fixed cover (5), engaging grooves (38) being opened on both sides of the filter box (3), and the engaging grooves (38) being movably engaged with the engaging plates (36).

9. The hierarchical sewage treatment tank capable of scraping off sludge according to claim 2, characterized in that: The transmission discharging mechanism comprises a connecting rod (42) which passes through and is rotatably mounted on the bottom of the discharge pipe (40); the top end of the connecting rod (42) is fixedly sleeved with an inner rotating seat (43); a limiting seat (44) is fixedly mounted inside one side of the inner rotating seat (43); a ratchet (45) is rotatably mounted inside the limiting seat (44); a spring (46) is fixedly connected between the ratchet (45) and the side wall of the inner rotating seat (43); the ratchet (45) and the inner rotating seat (43) form an elastic reset structure through the spring (46) and the limiting seat (44); the outer rings of the upper and lower ends of the inner rotating seat (43) are rotatably connected with an outer sleeve seat (47); a tooth groove (48) is provided inside the outer sleeve seat (47); the tooth groove (48) is movably engaged with the ratchet (45).

10. A graded sewage treatment tank capable of scraping off sludge according to claim 9, characterized in that: The transmission discharging mechanism also includes a driving screw (49) fixedly mounted on the bottom end of the connecting rod (42); the outer ring threaded sleeve of the driving screw (49) is provided with a lifting seat (50); a lifting rod (51) is fixedly mounted on the front end of the lifting seat (50); the lifting rod (51) is slidably connected to the bottom of the discharge pipe (40); a sealing plug (52) is fixedly connected to the top end of the lifting rod (51); and the middle part of the sealing plug (52) is slidably connected to the connecting rod (42).

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