A low-carbon and environmentally friendly sewage purification device

Abstract

The present invention proposes a low-carbon and environmentally friendly sewage purification device, which relates to the technical field of sewage purification devices, including a separation cylinder, a working groove with an opening facing upwards is provided on the separation cylinder, a driving rod is rotatably installed in the working groove, the axis of the driving rod coincides with the axis of the working groove, a filter screen and a filter plate are installed in the working groove, and the filter screen is located above the filter plate; the working groove above the filter screen is a coarse filtration chamber, the working groove between the filter screen and the filter plate is a flocculation filtration chamber, and the working groove below the filter plate is a clean water chamber; when the driving rod rotates forward. The present invention proposes a low-carbon and environmentally friendly sewage purification device, which can combine the coarse filtration and flocculation filtration of sewage on the same machine through the separation cylinder, driving rod, filter screen, filter plate, blocking door plate and multi-purpose rod, and can also clean up the large pieces of solid waste obtained by the coarse filtration and the flocculants produced by flocculation at the same time, thereby reducing the steps of waste discharge and unnecessary troubles.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage purification devices, and in particular to a low-carbon and environmentally friendly sewage purification device. Background Art

[0002] Various sewage treatment equipment is continuously applied to the field of wastewater treatment. Sewage treatment is to make sewage meet the water quality requirements for drainage or reuse. It is widely used in various fields such as construction, industry, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc.

[0003] Existing sewage purification devices usually need to first filter out large pieces of solid dirt in the sewage through coarse filtration, and then add flocculants to make the suspended particles in the water lose stability through chemical reactions to form flocs, and then precipitate and filter the flocculated sewage. In the above process, the solid waste after solid-liquid separation needs to be cleaned out during both coarse filtration and subsequent filtration, which will cause inconvenience during cleaning. For example, during coarse filtration, it is necessary to salvage and other cleaning operations for the large pieces of solid waste filtered out, and the subsequent flocculation filtration also needs to clean the sediment, which requires cleaning in two steps, which is more inconvenient. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a low-carbon and environmentally friendly sewage purification device.

[0005] The present invention provides a low-carbon and environmentally friendly sewage purification device, comprising a separation cylinder, a working groove with an upward opening formed on the separation cylinder, a driving rod rotatably installed in the working groove, the axis of the driving rod coincides with the axis of the working groove, a filter screen and a filter plate are installed in the working groove, and the filter screen is located above the filter plate;

[0006] The working groove above the filter screen is a coarse filtration chamber, the working groove between the filter screen and the filter plate is a flocculation filtration chamber, and the working groove below the filter plate is a clean water chamber;

[0007] When the driving rod rotates in the forward direction, the driving rod can drive the filter screen to rotate synchronously in the working tank;

[0008] When the driving rod rotates in the opposite direction, the driving rod can drive the filter screen to move upward in the working tank;

[0009] The driving rod is fixedly connected to a multi-purpose rod at a section between the filter screen and the filter plate, a slag discharge port communicating with the flocculation filter chamber is provided on the outer periphery of the separation cylinder, and a blocking door plate capable of blocking the slag discharge port is installed on the separation cylinder;

[0010] When the driving rod rotates forward, the blocking door plate blocks the slag discharge port;

[0011] When the driving rod rotates in the reverse direction, the multi-purpose rod can drive the blocking door plate to open the slag discharge port.

[0012] Preferably, the filter screen is in a cone shape, and the tip of the filter screen is arranged upward.

[0013] Preferably, a thread is provided on the outer circumference of a top section of the driving rod, a threaded barrel is fixedly mounted on the filter screen, the threaded barrel is threadedly mounted on the threaded section of the driving rod, a support ring is fixedly mounted on the inner wall of the working groove, and the support ring can prevent the driving rod from descending in the working groove.

[0014] Preferably, a fixing ring is sleeved on the outer periphery of the driving rod, the outer diameter of the fixing ring is the same as the diameter of the working groove, and a limited rotation structure is installed on the fixing ring, which can prevent the driving rod from rotating in the working groove in the reverse direction.

[0015] Preferably, the rotation limiting structure includes a control pin and an ejection spring; a receiving groove capable of receiving the control pin is provided on the outer periphery of the fixing ring, the control pin is slidably installed in the receiving groove, the ejection spring is located in the receiving groove, the two ends of the ejection spring are respectively connected to the ejection spring and the inner wall of the end of the receiving groove, a vertical triangular groove is provided on the inner wall of the working groove, and the end of the control pin can be inserted into the vertical triangular groove.

[0016] When the driving rod rotates in the positive direction, the end inclined surface of the control pin slides with the inclined surface side wall of the vertical triangular groove;

[0017] When the driving rod rotates in the opposite direction, the end of the control pin abuts against the side wall of the vertical triangular groove and is stuck.

[0018] Preferably, the blocking door plate is rotatably mounted on the separation cylinder via a rotating shaft, and a No. 2 torsion spring is mounted on the rotating shaft of the blocking door plate, and the No. 2 torsion spring can drive the blocking door plate to rotate and block the slag discharge port.

[0019] Preferably, the multi-purpose rod comprises a scraping rod and a folding rod, one end of the scraping rod is fixedly connected to the driving rod, and one end of the scraping rod away from the driving rod is rotatably connected to the folding rod via a rotating shaft, and a No. 1 torsion spring is mounted on the rotating shaft of the scraping rod;

[0020] A triangular block is fixedly connected to one side wall of the blocking door plate close to the working groove;

[0021] When the driving rod rotates in the forward direction, the folding rod abuts against one side of the triangular block, and the folding rod rotates at the end of the wiping rod and avoids the triangular block;

[0022] When the driving rod rotates in the opposite direction, the end of the folding rod abuts against the inclined surface of the triangular block to slide and push open the blocking door panel.

[0023] Preferably, the top surface of the filter plate is a conical surface, and the tip of the filter plate is arranged upward, and the scraping rod is arranged obliquely;

[0024] When the scraping rod performs a circular motion, the scraping rod can scrape the conical surface of the filter plate.

[0025] Preferably, a motor is fixedly mounted at the bottom of the separation cylinder, and the output shaft of the motor is fixedly connected to the bottom end of the driving rod;

[0026] A drainage pipe connected to the clean water chamber is fixedly installed on the separation cylinder;

[0027] A stirring blade is fixedly connected to a section of the outer periphery of the driving rod located in the flocculation and filtration chamber.

[0028] Preferably, a protective outer cylinder is sleeved on the outer circumference of the separation cylinder, the inner diameter of the protective outer cylinder is larger than the outer diameter of the separation cylinder, a support rod is fixedly connected between the protective outer cylinder and the separation cylinder, and a supporting foot is fixedly connected to the bottom of the protective outer cylinder;

[0029] The top end of the protective outer cylinder is fixedly connected with a cross bracket, and the top end of the driving rod is rotatably connected with the cross bracket.

[0030] A low-carbon and environmentally friendly sewage purification device proposed by the present invention has the following beneficial effects: through the arranged separation cylinder, driving rod, filter screen, filter plate, blocking door plate and multi-purpose rod, the coarse filtration and flocculation filtration of sewage can be combined on the same machine, and the large pieces of solid waste obtained by the coarse filtration and the flocculants produced by flocculation can be cleaned at the same time, thereby reducing the steps of waste discharge and unnecessary trouble. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of a low-carbon and environmentally friendly sewage purification device proposed by the present invention;

[0032] Figure 2 A cross-sectional view of a low-carbon and environmentally friendly sewage purification device proposed by the present invention;

[0033] Figure 3 A top view of a filter screen in a separation cylinder in a low-carbon and environmentally friendly sewage purification device proposed by the present invention;

[0034] Figure 4 A low-carbon and environmentally friendly sewage purification device proposed by the present invention Figure 3 Enlarged view of point A in the middle;

[0035] Figure 5 A side cross-sectional view of the cooperation between the filter screen and the driving rod in a low-carbon and environmentally friendly sewage purification device proposed by the present invention;

[0036] Figure 6A low-carbon and environmentally friendly sewage purification device proposed by the present invention Figure 5 Enlarged view of point B in the middle;

[0037] Figure 7 A top view of a sectional view of a blocking door plate on a separation cylinder in a low-carbon and environmentally friendly sewage purification device proposed by the present invention;

[0038] Figure 8 This is a schematic structural diagram of a scraping rod and a folding rod in a low-carbon and environmentally friendly sewage purification device proposed by the present invention.

[0039] In the figure: 1. separation cylinder; 2. driving rod; 3. filter screen; 4. filter plate; 5. sealing door plate; 6. threaded cylinder; 7. supporting ring; 8. fixing ring; 9. control pin; 10. ejection spring; 11. vertical triangular groove; 12. scraper rod; 13. folding rod; 14. triangular block; 15. motor; 16. drain pipe; 17. protective outer cylinder; 18. cross bracket. DETAILED DESCRIPTION

[0040] Reference Figure 1-Figure 8 The present invention proposes a low-carbon and environmentally friendly sewage purification device, including a separation cylinder 1, a working groove with an opening facing upward is opened on the separation cylinder 1, the cross-section of the working groove is circular, a driving rod 2 is rotatably installed in the working groove, the axis of the driving rod 2 coincides with the axis of the working groove, a filter screen 3 and a filter plate 4 are installed in the working groove, and the filter screen 3 is located above the filter plate 4; the working groove above the filter screen 3 is a coarse filter chamber, the working groove between the filter screen 3 and the filter plate 4 is a flocculation filter chamber, and the working groove below the filter plate 4 is a clean water chamber, the driving rod 2 penetrates the filter plate 4 and the filter screen 3 at one time, and the material of the filter plate 4 can be existing materials such as activated carbon and filter cotton; in specific operation, the sewage is directly discharged through the pipeline After entering the working tank of the separation cylinder 1, the sewage first enters the coarse filter chamber. The large solid waste (twigs, plastic bottles, leaves, etc.) in the sewage is filtered out through the large-pore filter 3. The sewage is filtered into the flocculation filter chamber, and the flocculant and sewage are poured into the coarse filter chamber together. When the flocculant and sewage pass through the filter holes on the filter 3, the sewage and the flocculant will be dispersed, which is convenient for the sewage and the flocculant to mix. The flocculant and sewage are filtered to the flocculation filter chamber. The flocculant turns the suspended particles in the sewage into floccules. At the same time, the sewage is filtered through the filter plate 4, and the floccules and suspended particles are trapped in the flocculation filter chamber. The clean water filtered by the filter plate 4 reaches the clean water chamber, completing the purification of the sewage.

[0041] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in , a motor 15 is fixedly installed at the bottom of the separation cylinder 1, and the output shaft of the motor 15 is fixedly connected to the bottom end of the driving rod 2. When the driving rod 2 rotates forward, the driving rod 2 can drive the filter screen 3 to rotate synchronously in the working tank; when the motor 15 drives the driving rod 2 to rotate forward ( Figure 3 The driving rod 2 rotates counterclockwise), and the filter screen 3 is driven by the driving rod 2 to rotate synchronously. The filter screen 3 plays a filtering role to filter out large pieces of solid waste in the sewage.

[0042] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in , when the driving rod 2 rotates in the opposite direction, the driving rod 2 can drive the filter screen 3 to move upward in the working groove; when the motor 15 drives the driving rod 2 to rotate in the opposite direction, the filter screen 3 rises in the working groove, and when the filter screen 3 rises, it can drive the large pieces of solid waste intercepted by the filter to rise synchronously until the filter screen 3 is lifted to the opening of the separation cylinder 1 (the filter screen 3 just leaves the opening of the separation cylinder 1), at this time, the filter screen 3 can rotate synchronously with the driving rod 2, and the filter screen 3 generates centrifugal force when rotating to throw out the solid waste on the filter screen 3, thereby completing the cleaning of large pieces of solid waste.

[0043] like Figure 2 , Figure 7 and Figure 8 As shown in the figure, the driving rod 2 is located at a section between the filter screen 3 and the filter plate 4 and is fixedly connected to a multi-purpose rod. The outer periphery of the separation cylinder 1 is provided with a slag discharge port connected to the flocculation filter chamber, and a blocking door plate 5 capable of blocking the slag discharge port is installed on the separation cylinder 1; when the driving rod 2 rotates forward, the blocking door plate 5 blocks the slag discharge port; the sewage reaches the flocculation filter chamber after coarse filtration through the filter screen 3, the blocking door plate 5 closes the slag discharge port, and the motor 15 drives the driving rod 2 to rotate forward, and the driving rod 2 drives the multi-purpose rod to make a forward circular motion. At the same time, the driving rod 2 can play a role in stirring the sewage, so that the flocculant and the sewage are fully mixed, thereby improving the flocculation effect on the suspended matter in the sewage, and the flocculated sewage is filtered through the filter plate 4 to form clear water.

[0044] like Figure 2 , Figure 7 and Figure 8As shown in the figure, when the driving rod 2 rotates in the opposite direction, the multi-purpose rod can drive the blocking door plate 5 to open the slag discharge port. After filtering for a period of time, when the flocculants in the flocculation filter chamber reach a certain amount, the injection of sewage into the separation cylinder 1 is stopped, and the driving rod 2 is driven by the motor 15 to rotate in the opposite direction. When the driving rod 2 drives the multi-purpose rod to rotate in the opposite direction, the multi-purpose rod drives the blocking door plate 5 to open, and the flocculants filtered out of the flocculation filter chamber are thrown out from the slag discharge port by the rotation of the multi-purpose rod. While discharging the slag, the driving rod 2 will also drive the filter screen 3 to rise and drive large pieces of solid waste to be thrown out, thereby completing the discharge of large pieces of solid waste and flocculation filter material, so that the two operations can be carried out simultaneously, reducing unnecessary troubles, and at the same time, only one motor 15 is needed to drive it, reducing capital investment and energy consumption.

[0045] like Figure 2 As shown in the figure, in actual situations, the flat filter screen 3 is prone to large pieces of solid waste being spread on the filter screen 3, so the filter screen 3 is designed to be conical, and the tip of the filter screen 3 is driven to be arranged upward, and when large pieces of solid waste fall on the top surface of the filter screen 3, as the filter screen 3 rotates, the large pieces of solid waste are thrown away and reach the inner wall of the separation cylinder 1 through the action of centrifugal force, and a small amount of large pieces of solid waste are at the tip of the separation cylinder 1, thereby ensuring the filtering effect of the sewage.

[0046] like Figure 2 and Figure 5 As shown in the figure, a thread is provided on the outer circumference of the top section of the driving rod 2, a threaded barrel 6 is fixedly mounted on the filter screen 3, the threaded barrel 6 is threadedly sleeved on the threaded section of the driving rod 2, and a supporting ring 7 is fixedly mounted on the inner wall of the working groove, the supporting ring 7 can prevent the driving rod 2 from descending in the working groove. In actual conditions, the driving rod 2 and the threaded barrel 6 are threadedly matched, and the supporting ring 7 supports the filter screen 3, so that the filter screen 3 cannot continue to descend, so that the threaded barrel 6 and the driving rod 2 are in a relatively static state, and the driving rod 2 drives the threaded barrel 6 to rotate synchronously.

[0047] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the figure, a fixing ring 8 is sleeved on the outer periphery of the driving rod 2, and the outer diameter of the fixing ring 8 is the same as the diameter of the working groove. A limited rotation structure is installed on the fixing ring 8, and the limited rotation structure can prevent the driving rod 2 from rotating in the working groove in the reverse direction. When the driving rod 2 rotates in the reverse direction, in order to prevent the filter screen 3 from rising synchronously with the driving rod 2, the driving rod 2 and the threaded barrel 6 are threadedly matched, and the threaded barrel 6 and the filter screen 3 are driven to rise. The rotation of the fixing ring 8 and the filter screen 3 is limited by the limited rotation structure, thereby ensuring the rising action of the threaded barrel 6 and the filter screen 3, and can lift up the large pieces of solid waste that have been filtered and intercepted.

[0048] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the figure, the rotation limiting structure includes a control pin 9 and an ejection spring 10; the end of the control pin 9 is triangular, and a receiving groove capable of receiving the control pin 9 is provided on the outer periphery of the fixing ring 8, the control pin 9 is slidably installed in the receiving groove, and the ejection spring 10 is located in the receiving groove, and the two ends of the ejection spring 10 are respectively connected to the ejection spring 10 and the inner wall of the end of the receiving groove, and a vertical triangular groove 11 is provided on the inner wall of the working groove, and the end of the control pin 9 can be inserted into the vertical triangular groove 11. When the driving rod 2 rotates forward, the end inclined surface of the control pin 9 slides with the inclined side wall of the vertical triangular groove 11 In normal state, the rebound effect of the ejection spring 10 pushes the control pin 9 to be ejected out of the receiving groove. When the control pin 9 reaches the position of the vertical triangular groove 11, the end of the control pin 9 is inserted into the vertical triangular groove 11. Since the inclined surface at the end of the control pin 9 can slide with the inclined surface side wall of the vertical triangular groove 11 and retract into the receiving groove, the positive rotation of the filter screen 3 and the fixing ring 8 is ensured. At the same time, when the filter screen 3 rotates synchronously with the driving rod 2, the threaded barrel 6 and the driving rod 2 are also in a relatively static state, and there will be no threaded fit, thereby ensuring the height of the filter screen 3.

[0049] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the figure, when the driving rod 2 rotates in the opposite direction, the end of the control pin 9 abuts against the side wall of the vertical triangular groove 11 and is stuck, thereby limiting the rotation of the fixing ring 8, the filter screen 3 and the threaded cylinder 6, so that the threaded cylinder 6 and the driving rod 2 are threadedly matched. When the driving rod 2 rotates, the threaded cylinder 6, the filter screen 3 and the fixing ring 8 are driven to rise, and the large pieces of solid waste filtered out are brought up by the filter screen 3 and thrown out.

[0050] like Figure 2 and Figure 7 As shown in the figure, the blocking door panel 5 is rotatably installed on the separation cylinder 1 through a rotating shaft, and a No. 2 torsion spring is mounted on the rotating shaft of the blocking door panel 5, and the No. 2 torsion spring can drive the blocking door panel 5 to rotate and block the slag discharge port. The No. 2 torsion spring drives the blocking door panel 5 to rotate, and the blocking door panel 5 blocks the slag discharge port to reduce the direct discharge of sewage; in actual situations, other elastic tools will be installed on the separation cylinder 1 to drive the sealing door panel 5 to seal tightly, and no redundant introduction will be made here.

[0051] like Figure 2 , Figure 7 and Figure 8As shown in, the multi-purpose rod includes a scraper rod 12 and a folding rod 13, one end of the scraper rod 12 is fixedly connected to the driving rod 2, and the end of the scraper rod 12 away from the driving rod 2 is rotatably connected to the folding rod 13 through a rotating shaft. In the normal state, the scraper rod 12 and the folding rod 13 form a straight rod, and the maximum angle between the scraper rod 12 and the folding rod 13 is 180° in the normal state. The scraper rod 12 and the folding rod 13 can only rotate unidirectionally to one side of the scraper rod 12. A No. 1 torsion spring is mounted on the rotating shaft of the scraper rod 12, and a triangular block 14 is fixedly connected to one side wall of the blocking door panel 5 close to the working groove. When the driving rod 2 rotates forward, the folding rod 13 abuts against one side of the triangular block 14, and the folding rod 13 rotates at the end of the scraper rod 12 and avoids the triangular block 14; when the driving rod 2 rotates forward, the folding rod 13 abuts against the triangular block 14 , since the torsional force of the No. 1 torsion spring is not enough to keep the folding rod 13 and the scraping rod 12 in a straight rod state, the folding rod 13 rotates and bends at the end of the scraping rod 12, so that the folding rod 13 avoids the triangular block 14, ensuring the positive rotation of the scraping rod 12 and will not open the blocking door panel 5; when the driving rod 2 rotates in the opposite direction, the end of the folding rod 13 abuts on the inclined surface of the triangular block 14 to slide and push open the blocking door panel 5, and when the driving rod 2 rotates in the opposite direction, the end of the folding rod 13 abuts on the inclined surface of the triangular block 14. Since the folding rod 13 cannot rotate in the opposite direction at the end of the scraping rod 12 at this time, since the driving rod 2 drives the scraping rod 12 and the folding rod 13 to rotate synchronously, the end of the folding rod 13 slides on the inclined surface of the triangular block 14, causing the blocking door panel 5 to rotate and open the slag discharge port, and discharge the flocculated solids produced by flocculation.

[0052] like Figure 2 As shown in , during filtration, sewage with flocculants added thereto will produce a large amount of flocs, and the precipitation of flocs may block the filter plate 4. Therefore, the top surface of the filter plate 4 is designed to be a conical surface. When the flocs are precipitated, they will slide around along the conical surface. There are only a small amount of flocs in the middle position of the filter plate 4, which ensures the filtration effect. Similarly, when discharging slag, it is also convenient for the flocs to slide along the conical surface to be discharged around. The tip of the filter plate 4 is arranged upward, and the scraper rod 12 is arranged obliquely; when the scraper rod 12 makes a circular motion, the scraper rod 12 can scrape the conical surface of the filter plate 4. When the drive rod 2 drives the scraper rod 12 to rotate, the scraper rod 12 can also scrape the top conical surface of the filter plate 4. For example, when rotating in the forward direction, the flocs are scraped to ensure the filtration effect of the sewage and reduce the accumulation of flocs on the conical surface of the filter plate 4 to affect the filtration. When rotating in the reverse direction, the flocs on the conical surface of the filter plate 4 can be scraped off and discharged.

[0053] like Figure 1 and Figure 2 As shown in FIG. 1 , a drain pipe 16 communicating with the clean water chamber is fixedly mounted on the separation cylinder 1 ; the clean water after the purification treatment is discharged through the drain pipe 16 .

[0054] like Figure 2As shown in the figure, a section of the outer periphery of the driving rod 2 located in the flocculation filtration chamber is fixedly connected with a stirring blade, and the stirring blade and the multi-purpose rod are used together to stir the sewage and the flocculant to ensure that the flocculant and the sewage are fully mixed.

[0055] like Figure 1 and Figure 2 As shown in the figure, a protective outer cylinder 17 is mounted on the outer periphery of the separation cylinder 1, the inner diameter of the protective outer cylinder 17 is larger than the outer diameter of the separation cylinder 1, a support rod is fixedly connected between the protective outer cylinder 17 and the separation cylinder 1, and a supporting foot is fixedly connected to the bottom of the protective outer cylinder 17; the top of the separation cylinder 1 is located in the protective outer cylinder 17, and the top of the separation cylinder 1 is lower than the top of the protective outer cylinder 17, so that when large pieces of solid waste are thrown out, they will hit the inner wall of the protective outer cylinder 17, thereby reducing the range of large pieces of solid waste being thrown out too large and inconvenient to clean; similarly, flocculants are also blocked by the protective outer cylinder 17 when being discharged, thereby ensuring the collection and treatment of flocculants and large pieces of solid waste.

[0056] like Figure 1 and Figure 2 As shown in , the top of the protective outer cylinder 17 is fixedly connected with a cross bracket 18, and the top of the driving rod 2 is rotatably connected to the cross bracket 18, which can increase the rotation stability of the driving rod 2 and limit the lifting height of the filter screen 3.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-carbon and environmentally friendly sewage purification device, characterized in that: The separation cylinder (1) comprises a working groove with an upward opening, a driving rod (2) rotatably mounted in the working groove, the axis of the driving rod (2) coincides with the axis of the working groove, a filter screen (3) and a filter plate (4) are mounted in the working groove, and the filter screen (3) is located above the filter plate (4); The working groove above the filter screen (3) is a coarse filtration chamber, the working groove between the filter screen (3) and the filter plate (4) is a flocculation filtration chamber, and the working groove below the filter plate (4) is a clean water chamber; When the driving rod (2) rotates in the forward direction, the driving rod (2) can drive the filter screen (3) to rotate synchronously in the working groove; When the driving rod (2) rotates in the reverse direction, the driving rod (2) can drive the filter screen (3) to move upward in the working groove; The driving rod (2) is located between the filter screen (3) and the filter plate (4) and has a multi-purpose rod fixedly connected to one end thereof; a slag discharge port communicating with the flocculation filter chamber is provided on the outer periphery of the separation cylinder (1); and a blocking door plate (5) capable of blocking the slag discharge port is installed on the separation cylinder (1); When the driving rod (2) rotates in the forward direction, the blocking door plate (5) blocks the slag discharge port; When the driving rod (2) rotates in the reverse direction, the multi-purpose rod can drive the blocking door plate (5) to open the slag discharge port; A fixing ring (8) is sleeved on the outer circumference of the driving rod (2); the outer diameter of the fixing ring (8) is the same as the diameter of the working groove; a rotation limiting structure is installed on the fixing ring (8); the rotation limiting structure can prevent the driving rod (2) from rotating in the working groove in the reverse direction; The rotation limiting structure comprises a control pin (9) and an ejection spring (10); a receiving groove capable of receiving the control pin (9) is provided on the outer periphery of the fixing ring (8); the control pin (9) is slidably mounted in the receiving groove; the ejection spring (10) is located in the receiving groove; two ends of the ejection spring (10) are respectively connected to the ejection spring (10) and the inner wall of the end of the receiving groove; a vertical triangular groove (11) is provided on the inner wall of the working groove; the end of the control pin (9) can be inserted into the vertical triangular groove (11); When the driving rod (2) rotates in the forward direction, the end inclined surface of the control pin (9) slides with the inclined side wall of the vertical triangular groove (11); When the driving rod (2) rotates in the opposite direction, the end of the control pin (9) abuts against the side wall of the vertical triangular groove (11) and is stuck; The blocking door plate (5) is rotatably mounted on the separation cylinder (1) via a rotating shaft, and a No. 2 torsion spring is mounted on the rotating shaft of the blocking door plate (5), and the No. 2 torsion spring can drive the blocking door plate (5) to rotate and block the slag discharge port; The multi-purpose rod comprises a scraping rod (12) and a folding rod (13); one end of the scraping rod (12) is fixedly connected to the driving rod (2); one end of the scraping rod (12) away from the driving rod (2) is rotatably connected to the folding rod (13) via a rotating shaft; and a first torsion spring is mounted on the rotating shaft of the scraping rod (12); A triangular block (14) is fixedly connected to a side wall of the blocking door plate (5) close to the working groove; When the driving rod (2) rotates in the forward direction, the folding rod (13) abuts against one side of the triangular block (14), and the folding rod (13) rotates at the end of the scraping rod (12) and avoids the triangular block (14); When the driving rod (2) rotates in the reverse direction, the end of the folding rod (13) abuts against the inclined surface of the triangular block (14) to slide and push open the blocking door panel (5).

2. A low-carbon and environmentally friendly sewage purification device according to claim 1, characterized in that: The filter screen (3) is in the shape of a cone, and the tip of the filter screen (3) is arranged upward.

3. A low-carbon and environmentally friendly sewage purification device according to claim 2, characterized in that: The top section of the driving rod (2) is provided with a thread on its outer periphery, a threaded barrel (6) is fixedly mounted on the filter screen (3), the threaded barrel (6) is threadedly sleeved on the threaded section of the driving rod (2), and a support ring (7) is fixedly mounted on the inner wall of the working groove, the support ring (7) being capable of preventing the driving rod (2) from descending in the working groove.

4. A low-carbon and environmentally friendly sewage purification device according to claim 1, characterized in that: The top surface of the filter plate (4) is a conical surface, the tip of the filter plate (4) is arranged upward, and the scraping rod (12) is arranged obliquely; When the scraping rod (12) performs a circular motion, the scraping rod (12) can scrape the conical surface of the filter plate (4).

5. A low-carbon and environmentally friendly sewage purification device according to claim 1, characterized in that: A motor (15) is fixedly mounted on the bottom of the separation cylinder (1), and an output shaft of the motor (15) is fixedly connected to the bottom end of the driving rod (2); A drainage pipe (16) connected to the clean water chamber is fixedly mounted on the separation cylinder (1); A stirring blade is fixedly connected to a section of the outer periphery of the driving rod (2) located in the flocculation filtration chamber.

6. A low-carbon and environmentally friendly sewage purification device according to claim 1, characterized in that: A protective outer cylinder (17) is sleeved on the outer circumference of the separation cylinder (1); the inner diameter of the protective outer cylinder (17) is larger than the outer diameter of the separation cylinder (1); a support rod is fixedly connected between the protective outer cylinder (17) and the separation cylinder (1); and a supporting foot is fixedly connected to the bottom of the protective outer cylinder (17); The top end of the protective outer cylinder (17) is fixedly connected to a cross bracket (18), and the top end of the driving rod (2) is rotatably connected to the cross bracket (18).

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