Integrated two-stage sewage treatment tank capable of backwashing

Abstract

The present invention relates to the technical field of sewage filtration, and discloses a backwashing integrated two-stage sewage treatment tank, which comprises a filtration tank body, the top outer wall of the filtration tank body is provided with a water inlet pipe in a penetrating manner, the bottom outer wall of the filtration tank body is provided with a water outlet pipe in a penetrating manner, and the lower part of the inner wall of the filtration tank body is fixedly provided with a water permeable plate; a supporting ring body is fixedly mounted at the upper part of the inner wall of the filtering tank body, a filtering plate is fixedly mounted on the inner wall of the supporting ring body, and a supporting sleeve is fixedly mounted on the top surface of the water permeable plate. In the process that the operating rod drives the connecting rod to rotate, and in the process that the shifting block on the side face of the connecting rod makes contact with and is separated from the connecting ball on the inner wall of the fixed sleeve, reciprocating driving of the guide ring can be achieved, so that an ultrafiltration membrane can be bent and tensioned, the oscillation effect is achieved, it can be ensured that impurities attached to the ultrafiltration membrane are completely removed, and the service life of the ultrafiltration membrane is prolonged. The subsequent filtration of the ultrafiltration membrane is more efficient, and the service life of the ultrafiltration membrane is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of sewage filtration, in particular to an integrated two-stage sewage treatment tank capable of backwashing. Background Art

[0002] Wastewater treatment filtration is a key step in removing suspended matter, colloidal impurities and some soluble pollutants in water, and achieves efficient separation of pollutants through physical interception, adsorption and biological synergy.

[0003] In existing sewage treatment filtration technologies, backwashing technology is widely used to clean filter materials to restore filtration performance. However, when faced with sewage containing high-hardness particles, these particles with higher hardness (such as inorganic gravel, metal oxide crystals or silicate / calcium magnesium compound fragments in industrial wastewater) are easily embedded in the pore structure of the filter material or mechanically stuck in the gaps between the filter layers. Their deformation resistance forms a physical mosaic effect with the surface roughness / pore curvature of the filter material, making it difficult for traditional backwashing processes to remove them through simple fluid kinetic energy, which in turn causes problems such as attenuation of the effective filtration area of ​​the filter material, shortening of the backwash cycle, abnormal increase in transmembrane pressure difference and fluctuation in effluent water quality, ultimately resulting in a decline in the overall efficiency of the filtration system and an increase in operation and maintenance costs.

[0004] Therefore, it is necessary to design an integrated two-stage sewage treatment tank that can perform backwashing to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an integrated two-stage sewage treatment tank capable of backwashing.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An integrated two-stage sewage treatment tank capable of backwashing comprises a filter tank body, wherein a water inlet pipe is provided through the top outer wall of the filter tank body, a water outlet pipe is provided through the bottom outer wall of the filter tank body, and a water permeable plate is fixedly installed on the lower part of the inner wall of the filter tank body; A support ring is fixedly installed on the upper part of the inner wall of the filter tank body, a filter plate is fixedly installed on the inner wall of the support ring body, a support sleeve is fixedly installed on the top surface of the permeable plate, and an ultrafiltration membrane is arranged between the top surface of the support sleeve and the support ring body; A connecting component is provided between the ultrafiltration membrane and the supporting ring body, a cleaning component is provided on the inner side of the ultrafiltration membrane, and an operating component is provided on the filter plate.

[0007] As a preferred technical solution of the present invention, the connecting assembly includes a fixed sleeve fixedly installed on the bottom surface of the support ring body, the bottom surface of the fixed sleeve is provided with an annular groove, the inner wall of the annular groove is slidably installed with a guide ring, and the top surface of the ultrafiltration membrane is fixedly connected to the bottom surface of the guide ring, and a plurality of reset springs distributed in an annular array are fixedly installed between the top surface of the guide ring and the inner top surface of the annular groove, and the top surface of the guide ring is provided with a plurality of groups of transmission mechanisms distributed in an annular array.

[0008] As a preferred technical solution of the present invention, the transmission mechanism includes an inclined arc plate fixedly installed on the top surface of the guide ring, and a transmission rod corresponding to the inclined arc plate is provided through the inner wall of the fixed sleeve, and connecting balls are fixedly installed at both ends of the transmission rod.

[0009] As a preferred technical solution of the present invention, the transmission rod is L-shaped, and the bottom surface of the ultrafiltration membrane is fixedly connected to the top surface of the supporting sleeve.

[0010] As a preferred technical solution of the present invention, the cleaning assembly includes a rotating sleeve rotatably installed on the bottom surface of the filter plate, the outer wall of the rotating sleeve is hinged with a plurality of support rods distributed in a circular array, the bottom end of the support rod is hinged with a connecting rod, the bottom end of the connecting rod is hinged with a support rod, the bottom ends of several of the support rods are hinged with pull rods, and the bottom ends of the pull rods are located on the inner side of the supporting sleeve.

[0011] As a preferred technical solution of the present invention, a cleaning plate is fixedly installed on the side of several of the support rods, and hard bristles are provided on the side of the cleaning plate, and a shift block corresponding to the connecting ball is fixedly installed on the side of one of the several connecting rods.

[0012] As a preferred technical solution of the present invention, the outer wall of the pull rod is provided with two sections of reciprocating threads, and axial flow blades are threaded into the two sections of the reciprocating threads. Two fixed magnetic rings corresponding to the axial flow blades are fixedly installed on the inner wall of the support sleeve, and the outer wall of the axial flow blade is provided with flexible bristles.

[0013] As a preferred technical solution of the present invention, the operating component includes an operating rod that passes through the outer wall of the top of the filter tank body, and the bottom end of the operating rod passes through the filter plate, the rotating sleeve and the top surface of the pull rod in sequence, and the outer wall of the operating rod is symmetrically provided with two slots, and the inner wall of the slot is rotatably installed with a shaft rod, a limiting rod is fixedly mounted on the shaft rod, and a torsion spring is mounted on the end of the shaft rod, and the two ends of the torsion spring are respectively fixedly connected to the shaft rod and the slot.

[0014] As a preferred technical solution of the present invention, a plurality of spring telescopic rods distributed in a circular array are fixedly installed on the top outer wall of the filter tank body, and a limiting ring is fixedly installed on the telescopic ends of the plurality of spring telescopic rods.

[0015] As a preferred technical solution of the present invention, a rotating wheel is fixedly mounted on the top end of the operating rod, and a liquid guide ring is fixedly mounted on the top surface of the supporting ring body.

[0016] The present invention has the following beneficial effects: 1. By setting up filter plates and ultrafiltration membranes, sewage first passes through the liquid guide ring into the filter plates on the inner wall of the support ring for preliminary filtration to separate large particles of impurities, and then passes through the ultrafiltration membrane for secondary filtration to ensure that solid impurities in the sewage can be effectively separated. The sewage that has been filtered twice passes through the permeable plate into the outlet pipe for discharge, achieving two-stage high-efficiency filtration treatment of sewage and ensuring the water quality of the effluent. At the same time, the filter plates and ultrafiltration membranes can be effectively cleaned by backwashing to ensure the filtering effect of the device; 2. By setting the axial flow blades and support sleeves, when the filter plate and ultrafiltration membrane are blocked and need to be cleaned, pull the wheel to make the operating lever drive the pull rod to move upward, and the axial flow blades move out of the support sleeve and contact the inner wall of the ultrafiltration membrane. Under the action of water pressure, the axial flow blades are driven. Because they are screwed with the reciprocating threads on the outer wall of the pull rod and the operating lever and pull rod are fixed, the axial flow blades can slide back and forth along the pull rod when rotating, and clean the impurities on the inner wall of the ultrafiltration membrane through the flexible bristles on the outer wall, which greatly improves the effect of backwash cleaning of the ultrafiltration membrane and ensures the subsequent filtration performance of the ultrafiltration membrane; 3. By setting an operating rod and a cleaning plate, pull the operating rod, the support rod and the rod rotate to a horizontal state, and the cleaning plate on the side of the rod fits into the bottom surface of the filter plate. The driving wheel rotates the operating rod and the pull rod, and then drives the rod, the connecting rod, the support rod and the rotating sleeve to rotate. The hard brush on the side of the cleaning plate is used to clean the filter holes on the filter plate, which can effectively remove impurities blocked in the filter holes, improve the cleaning effect of the filter plate, and ensure the filtration efficiency of the filter plate; 4. By setting the shift block and the transmission rod, the operating rod drives the connecting rod to rotate. The shift block on the side of the connecting rod contacts and separates from the connecting ball on the inner wall of the fixed sleeve, which can realize the reciprocating drive of the guide ring, thereby bending and tightening the ultrafiltration membrane, playing an oscillating role, and ensuring that the impurities attached to the ultrafiltration membrane are completely cleaned up, making the subsequent filtration of the ultrafiltration membrane more efficient and extending the service life of the ultrafiltration membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 2 This is a schematic diagram of the overall partial cross-section structure of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 3 for Figure 2 A in the middle is an enlarged structural diagram; Figure 4 This is a schematic diagram of the pull rod and operating lever structure of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 5 for Figure 4 The enlarged structural diagram at B in the middle; Figure 6 This is a schematic diagram of the internal structure of the filter tank body of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 7 for Figure 6 The enlarged structural diagram at C in the middle; Figure 8 This is a schematic diagram of the structure of the permeable plate and support sleeve of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 9 This is a schematic diagram of the partial structure of the top of the operating rod of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 10 This is a partial cross-sectional structural diagram of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention; Figure 11 for Figure 10 The enlarged structural diagram at D in the middle; Figure 12 This is a schematic diagram of the exploded structure of the fixed sleeve and guide ring of the integrated two-stage sewage treatment tank capable of backwashing proposed by the present invention.

[0018] In the figure: 11, filter tank body; 12, water inlet pipe; 13, water outlet pipe; 14, permeable plate; 21, support ring; 22, filter plate; 23, support sleeve; 24, ultrafiltration membrane; 25, liquid guide ring; 31, fixed sleeve; 32, annular groove; 33, guide ring; 34, inclined arc plate; 35, transmission rod; 36, connecting ball; 37, return spring; 41, rotating sleeve; 42, support rod; 43, connecting rod; 44, support rod; 45, pull rod; 46, cleaning plate; 47, shift block; 51, reciprocating thread; 52, axial flow blade; 53, fixed magnetic ring; 61, operating lever; 62, rotor; 63, slot; 64, shaft; 65, limit rod; 66, torsion spring; 67, spring telescopic rod; 68, limit ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1 、 Figure 2 , an integrated two-stage sewage treatment tank capable of backwashing, comprising a filter tank body 11, a water inlet pipe 12 is provided through the top outer wall of the filter tank body 11, a water outlet pipe 13 is provided through the bottom outer wall of the filter tank body 11, and a water permeable plate 14 is fixedly installed on the lower part of the inner wall of the filter tank body 11; A support ring 21 is fixedly mounted on the upper portion of the inner wall of the filter tank 11, a filter plate 22 is fixedly mounted on the inner wall of the support ring 21, a support sleeve 23 is fixedly mounted on the top surface of the permeable plate 14, an ultrafiltration membrane 24 is provided between the top surface of the support sleeve 23 and the support ring 21, the bottom surface of the ultrafiltration membrane 24 is fixedly connected to the top surface of the support sleeve 23, and a liquid guide ring 25 is fixedly mounted on the top surface of the support ring 21; The staff can connect the sewage pipe to the water inlet pipe 12 on the filter tank body 11 to add sewage into the filter tank body 11. When the sewage enters the filter tank body 11, the sewage can enter the filter plate 22 on the inner wall of the support ring body 21 under the action of the liquid guide ring 25 for preliminary filtration, so that the large particles of impurities in the sewage are separated from the sewage. After the preliminary filtration, the sewage flows through the filter plate 22 and enters the inner side of the ultrafiltration membrane 24. When the sewage passes through the ultrafiltration membrane 24, the ultrafiltration membrane 24 can perform secondary filtration on the sewage, ensuring that the solid impurities in the sewage can be effectively separated. The sewage after two filtrations can pass through the permeable plate 14 into the outlet pipe 13 for discharge, thereby realizing two-stage filtration treatment of the sewage.

[0021] Reference Figure 2 、 Figure 3 and Figure 12 A connecting assembly is provided between the ultrafiltration membrane 24 and the support ring body 21, and the connecting assembly includes a fixed sleeve 31 fixedly mounted on the bottom surface of the support ring body 21, and an annular groove 32 is provided on the bottom surface of the fixed sleeve 31. A guide ring 33 is slidably mounted on the inner wall of the annular groove 32, and the top surface of the ultrafiltration membrane 24 is fixedly connected to the bottom surface of the guide ring 33. A plurality of return springs 37 distributed in an annular array are fixedly mounted between the top surface of the guide ring 33 and the inner top surface of the annular groove 32. The top surface of the guide ring 33 is provided with a plurality of transmission mechanisms distributed in an annular array. The transmission mechanism includes an inclined arc plate 34 fixedly mounted on the top surface of the guide ring 33. A transmission rod 35 corresponding to the inclined arc plate 34 is provided through the inner wall of the fixed sleeve 31. The transmission rod 35 is L-shaped, and connecting balls 36 are fixedly mounted at both ends of the transmission rod 35. During the cleaning process, the transmission rod 35 can slide in the radial direction of the fixed sleeve 31, and during the sliding of the transmission rod 35, the connecting ball 36 at its bottom end can drive the inclined arc plate 34, so that the guide ring 33 slides downward along the annular groove 32, and under the action of the reset spring 37, the guide ring 33 can slide back and forth to reset, thereby realizing the reciprocating drive of the guide ring 33, and the guide ring 33 can bend and tighten the ultrafiltration membrane 24 during the reciprocating sliding process, thereby playing an oscillating role on the ultrafiltration membrane 24, ensuring that the impurities attached to the ultrafiltration membrane 24 can be completely cleaned up, making the ultrafiltration membrane 24 more efficient during subsequent filtration.

[0022] Reference Figure 4 、 Figure 5 、 Figure 8 、 Figure 10 and Figure 11 , a cleaning assembly is provided on the inner side of the ultrafiltration membrane 24, and the cleaning assembly includes a rotating sleeve 41 rotatably mounted on the bottom surface of the filter plate 22, and the outer wall of the rotating sleeve 41 is hinged with a plurality of support rods 42 distributed in a ring array, the bottom end of the support rod 42 is hinged with a connecting rod 43, the bottom end of the connecting rod 43 is hinged with a support rod 44, and the bottom end of the plurality of support rods 44 is hinged with a pull rod 45, and the bottom end of the pull rod 45 is located on the inner side of the support sleeve 23, and the side surfaces of the plurality of support rods 42 are fixedly mounted with cleaning plates 46, and the side surfaces of the cleaning plates 46 are provided with hard bristles, and the side surface of one of the plurality of connecting rods 43 is fixedly mounted with a dial block 47 corresponding to the connecting sphere 36; The outer wall of the pull rod 45 is provided with two reciprocating threads 51, and the two reciprocating threads 51 are both threaded with axial flow blades 52. The inner wall of the support sleeve 23 is fixedly mounted with two fixed magnetic rings 53 corresponding to the axial flow blades 52, and the outer wall of the axial flow blades 52 is provided with flexible bristles. After the filter tank 11 has filtered the sewage for a period of time, the filter plate 22 and the ultrafiltration membrane 24 may be clogged. At this time, the staff can clean the filter plate 22 and the ultrafiltration membrane 24. During cleaning, the flushing water pipe can be connected to the outlet pipe 13, and the staff can drive the pull rod 45 to move the pull rod 45 upward. When the pull rod 45 moves upward, the two axial flow blades 52 on the outer wall can move out of the support sleeve 23, and the flexible bristles on the outer wall of the axial flow blade 52 can contact the inner wall of the ultrafiltration membrane 24. As the flushing pipe is opened, the backwash water can pass through the permeable plate 14 along the outer side of the ultrafiltration membrane 24. The water enters the inner side and then passes through the filter plate 22 and is discharged along the water inlet pipe 12. When the flushing water flows through the ultrafiltration membrane 24, the two axial flow blades 52 can be driven by the water pressure. The two axial flow blades 52 are screwed with the two reciprocating threads 51 on the outer wall of the pull rod 45. At this time, the pull rod 45 is in a fixed state. Therefore, when the axial flow blades 52 rotate, they can slide back and forth along the pull rod 45 through the reciprocating threads 51. The axial flow blades 52 can clean the inner wall of the ultrafiltration membrane 24 through the flexible bristles on the outer wall, ensuring that impurities attached to the inner wall of the ultrafiltration membrane 24 can be cleaned off, thereby improving the backwashing effect. In the initial state, the support rod 42, the connecting rod 43 and the support rod 44 are in a vertical state, and as the pull rod 45 moves, the support rod 44 can be driven to rotate. After the pull rod 45 is in place, the support rod 44 and the support rod 42 can be rotated to a horizontal state. At the same time, the cleaning plate 46 on the side of the support rod 42 can fit with the bottom surface of the filter plate 22. After the axial flow blade 52 cleans the ultrafiltration membrane 24 for a period of time, the staff can drive the pull rod 45 to rotate, and the pull rod 45 rotates. When the connecting rod 43 is rotated, the supporting rod 42, the connecting rod 43, the supporting rod 44 and the rotating sleeve 41 can be driven to rotate. During the rotation, the filter holes on the filter plate 22 can be cleaned by the hard bristles on the side of the cleaning plate 46, and the impurities blocked in the filter holes can be cleaned out, thereby improving the cleaning effect. At the same time, during the rotation of the connecting rod 43, the shifting block 47 on the side of the connecting rod 43 can contact the connecting ball 36 on the inner wall of the fixed sleeve 31 in turn, and the movement of the shifting block 47 can drive the connecting ball 36 and the transmission rod 35.

[0023] Reference Figure 6 、 Figure 7 、 Figure 9, an operating assembly is provided on the filter plate 22, and the operating assembly includes an operating rod 61 that is arranged on the top outer wall of the filter tank body 11, and the bottom end of the operating rod 61 passes through the filter plate 22, the rotating sleeve 41 and the top surface of the pull rod 45 in sequence, and a rotating wheel 62 is fixedly installed on the top of the operating rod 61. The outer wall of the operating rod 61 is symmetrically provided with two slots 63, and the inner wall of the slot 63 is rotatably installed with a shaft rod 64. A limit rod 65 is fixedly sleeved on the shaft rod 64, and a torsion spring 66 is sleeved on the end of the shaft rod 64, and the two ends of the torsion spring 66 are respectively fixedly connected to the shaft rod 64 and the slot 63. A plurality of spring telescopic rods 67 distributed in a ring array are fixedly installed on the top outer wall of the filter tank body 11, and a plurality of spring telescopic rods 67 are fixedly installed with a limit ring 68 at the telescopic end. When the operating rod 61 is pulled, in the initial state, the limit rod 65 is in a horizontal state under the action of the torsion spring 66, and when the pull rod 45 is pulled through the filter tank body 11, under the blocking action of the filter tank body 11, the limit rod 65 can be rotated into the slot 63 through the shaft 64 to ensure that the limit rod 65 can pass through the filter tank body 11. Similarly, the limit rod 65 can pass through the limit ring 68, and after the limit rod 65 passes through the limit ring 68, the limit rod 65 can be expanded again in a horizontal state under the action of the torsion spring 66, and the position of the operating rod 61 can be fixed with the support of the limit ring 68, and when the operating rod 61 is rotated by the rotating wheel 62, the limit rod 65 can move on the top surface of the limit ring 68. When resetting the operating rod 61 after cleaning the filter tank body 11, the staff can first pull the operating rod 61 upwards for a certain distance, and then press the limit rod 65 into the slot 63, and then press the operating rod 61 downwards to make the limit rod 65 pass through the limit ring 68. Similarly, the limit rod 65 can pass through the filter tank body 11, and the operating rod 61 can be continued to be pressed to reset it. After the operating rod 61 is reset, the two axial flow blades 52 can re-enter the support sleeve 23, and the two axial flow blades 52 can be fixed under the action of the fixed magnetic ring 53, so that the filter tank body 11 can continue to be used for filtering.

[0024] The specific working principle of the present invention is as follows: During use, the staff can first connect the sewage pipe to the water inlet pipe 12 on the filter tank body 11, and then add sewage into the filter tank body 11. When the sewage enters the filter tank body 11, the sewage can enter the filter plate 22 on the inner wall of the support ring body 21 under the action of the liquid guide ring 25 for preliminary filtration, so that large particles of impurities in the sewage are separated from the sewage. After the preliminary filtration, the sewage flows through the filter plate 22 and enters the inner side of the ultrafiltration membrane 24. When the sewage passes through the ultrafiltration membrane 24, the ultrafiltration membrane 24 can perform a secondary filtration on the sewage, ensuring that the solid impurities in the sewage can be effectively separated. The sewage after two filtrations can pass through the permeable plate 14 and enter the outlet pipe 13 for discharge, thereby realizing a two-stage filtration treatment of the sewage. After the filter tank 11 has filtered the sewage for a period of time, the filter plate 22 and the ultrafiltration membrane 24 may be clogged. At this time, the staff can clean the filter plate 22 and the ultrafiltration membrane 24. During cleaning, the flushing water pipe can be connected to the outlet pipe 13, and the staff can pull the runner 62 to move the operating rod 61 upward and drive the pull rod 45 to move upward. When the pull rod 45 moves upward, the two axial flow blades 52 on the outer wall can move out of the support sleeve 23, and the flexible bristles on the outer wall of the axial flow blade 52 can contact the inner wall of the ultrafiltration membrane 24. As the flushing pipe is opened, the backwash water can pass through the permeable plate 14 along the ultrafiltration membrane 2 4 enters the inner side, and then passes through the filter plate 22 and is discharged along the water inlet pipe 12. When the flushing water flows through the ultrafiltration membrane 24, the two axial flow blades 52 can be driven by the water pressure. The two axial flow blades 52 are screwed with the two reciprocating threads 51 on the outer wall of the pull rod 45. At this time, the operating rod 61 and the pull rod 45 are in a fixed state. Therefore, when the axial flow blades 52 rotate, they can slide back and forth along the pull rod 45 through the reciprocating threads 51, so that the axial flow blades 52 can clean the inner wall of the ultrafiltration membrane 24 through the flexible bristles on the outer wall, ensuring that impurities attached to the inner wall of the ultrafiltration membrane 24 can be cleaned off, thereby improving the backwashing effect. When the operating rod 61 pulls the pull rod 45 to move upward, the support rod 42, the connecting rod 43 and the support rod 44 are in a vertical state in the initial state, and as the pull rod 45 moves, the support rod 44 can be driven to rotate the support rod 44, and after the pull rod 45 is in place, the support rod 44 and the support rod 42 can be rotated to a horizontal state. At the same time, the cleaning plate 46 on the side of the support rod 42 can fit the bottom surface of the filter plate 22. After the axial flow blades 52 clean the ultrafiltration membrane 24 for a period of time, the staff can drive the runner 62 to drive the operating rod 61 and the pull rod 45 to rotate. When the pull rod 45 rotates, it can drive the support rod 42, the connecting rod 43, the support rod 44 and the rotating sleeve 41 to rotate. During the rotation, the hard bristles on the side of the cleaning plate 46 can be used to clean the filter holes on the filter plate 22, and the impurities blocked in the filter holes are cleaned out, thereby improving the cleaning effect. When the operating rod 61 drives the connecting rod 43 to rotate, the shift block 47 on the side of the connecting rod 43 can contact the connecting ball 36 on the inner wall of the fixed sleeve 31 in turn, and cooperate with the movement of the shift block 47 to drive the connecting ball 36 and the transmission rod 35, so that the transmission rod 35 slides in the radial direction of the fixed sleeve 31. During the sliding of the transmission rod 35, the connecting ball 36 at its bottom end can drive the inclined arc plate 34, so that the guide ring 33 slides downward along the annular groove 32. When the shift block 47 is separated from the connecting ball 36, the guide ring 33 can slide back and forth under the action of the return spring 37, thereby realizing the reciprocating drive of the guide ring 33. During the reciprocating sliding process, the guide ring 33 can bend and tighten the ultrafiltration membrane 24, thereby playing an oscillation effect on the ultrafiltration membrane 24, ensuring that the impurities attached to the ultrafiltration membrane 24 can be completely cleaned out, making the ultrafiltration membrane 24 more efficient in subsequent filtration. When the operating rod 61 is pulled, in the initial state, the limit rod 65 is in a horizontal state under the action of the torsion spring 66, and when the pull rod 45 is pulled through the filter tank body 11, under the blocking action of the filter tank body 11, the limit rod 65 can be rotated into the slot 63 through the shaft 64 to ensure that the limit rod 65 can pass through the filter tank body 11. Similarly, the limit rod 65 can pass through the limit ring 68, and after the limit rod 65 passes through the limit ring 68, the limit rod 65 can be expanded again in a horizontal state under the action of the torsion spring 66, and the position of the operating rod 61 can be fixed with the support of the limit ring 68, and when the operating rod 61 is rotated by the rotating wheel 62, the limit rod 65 can move on the top surface of the limit ring 68. When resetting the operating rod 61 after cleaning the filter tank body 11, the staff can first pull the operating rod 61 upwards for a certain distance, and then press the limit rod 65 into the slot 63, and then press the operating rod 61 downwards to make the limit rod 65 pass through the limit ring 68. Similarly, the limit rod 65 can pass through the filter tank body 11, and the operating rod 61 can be continued to be pressed to reset it. After the operating rod 61 is reset, the two axial flow blades 52 can re-enter the support sleeve 23, and the two axial flow blades 52 can be fixed under the action of the fixed magnetic ring 53, so that the filter tank body 11 can continue to be used for filtering.

[0025] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An integrated two-stage sewage treatment tank capable of backwashing, characterized in that: It comprises a filter tank body (11), a water inlet pipe (12) is provided through the top outer wall of the filter tank body (11), a water outlet pipe (13) is provided through the bottom outer wall of the filter tank body (11), and a water permeable plate (14) is fixedly installed on the lower part of the inner wall of the filter tank body (11); A support ring (21) is fixedly mounted on the upper portion of the inner wall of the filter tank (11), a filter plate (22) is fixedly mounted on the inner wall of the support ring (21), a support sleeve (23) is fixedly mounted on the top surface of the water-permeable plate (14), and an ultrafiltration membrane (24) is provided between the top surface of the support sleeve (23) and the support ring (21); A connecting component is provided between the ultrafiltration membrane (24) and the supporting ring body (21), a cleaning component is provided on the inner side of the ultrafiltration membrane (24), and an operating component is provided on the filter plate (22).

2. The integrated two-stage sewage treatment tank capable of backwashing according to claim 1 is characterized in that: The connecting assembly includes a fixed sleeve (31) fixedly mounted on the bottom surface of the supporting ring body (21), an annular groove (32) is provided on the bottom surface of the fixed sleeve (31), a guide ring (33) is slidably mounted on the inner wall of the annular groove (32), and the top surface of the ultrafiltration membrane (24) is fixedly connected to the bottom surface of the guide ring (33), a plurality of return springs (37) distributed in an annular array are fixedly mounted between the top surface of the guide ring (33) and the inner top surface of the annular groove (32), and a plurality of transmission mechanisms distributed in an annular array are provided on the top surface of the guide ring (33).

3. The integrated two-stage sewage treatment tank capable of backwashing according to claim 2, characterized in that: The transmission mechanism comprises an inclined arc plate (34) fixedly mounted on the top surface of the guide ring (33); a transmission rod (35) corresponding to the inclined arc plate (34) is provided through the inner wall of the fixed sleeve (31); and connecting balls (36) are fixedly mounted on both ends of the transmission rod (35).

4. The integrated two-stage sewage treatment tank capable of backwashing according to claim 3 is characterized in that: The transmission rod (35) is L-shaped, and the bottom surface of the ultrafiltration membrane (24) is fixedly connected to the top surface of the support sleeve (23).

5. The integrated two-stage sewage treatment tank capable of backwashing according to claim 3 is characterized in that: The cleaning assembly includes a rotating sleeve (41) rotatably mounted on the bottom surface of the filter plate (22), the outer wall of the rotating sleeve (41) is hinged with a plurality of support rods (42) distributed in a ring array, the bottom end of the support rod (42) is hinged with a connecting rod (43), the bottom end of the connecting rod (43) is hinged with a support rod (44), the bottom ends of the plurality of support rods (44) are hinged with a pull rod (45), and the bottom end of the pull rod (45) is located on the inner side of the support sleeve (23).

6. The integrated two-stage sewage treatment tank capable of backwashing according to claim 5, characterized in that: A cleaning plate (46) is fixedly mounted on the side surfaces of the plurality of support rods (42), and hard bristles are provided on the side surfaces of the cleaning plate (46). A shifting block (47) corresponding to the connecting sphere (36) is fixedly mounted on the side surface of one of the plurality of connecting rods (43).

7. The integrated two-stage sewage treatment tank capable of backwashing according to claim 5, characterized in that: The outer wall of the pull rod (45) is provided with two sections of reciprocating threads (51), and axial flow blades (52) are screwed into the two sections of the reciprocating threads (51). Two fixed magnetic rings (53) corresponding to the axial flow blades (52) are fixedly installed on the inner wall of the support sleeve (23), and the outer wall of the axial flow blades (52) is provided with flexible bristles.

8. The integrated two-stage sewage treatment tank capable of backwashing according to claim 5, characterized in that: The operating assembly includes an operating rod (61) that passes through the center of the outer wall of the top of the filter tank body (11), and the bottom end of the operating rod (61) passes through the filter plate (22), the rotating sleeve (41) and the top surface of the pull rod (45) in sequence, and is fixedly connected. The outer wall of the operating rod (61) is symmetrically provided with two slots (63), and the inner wall of the slot (63) is rotatably mounted with a shaft (64), and a limiting rod (65) is fixedly mounted on the shaft (64). The end of the shaft (64) is provided with a torsion spring (66), and the two ends of the torsion spring (66) are fixedly connected to the shaft (64) and the slot (63) respectively.

9. The integrated two-stage sewage treatment tank capable of backwashing according to claim 8, characterized in that: A plurality of spring telescopic rods (67) distributed in a ring array are fixedly mounted on the top outer wall of the filter tank body (11), and a limiting ring (68) is fixedly mounted on the telescopic ends of the plurality of spring telescopic rods (67).

10. The integrated two-stage sewage treatment tank capable of backwashing according to claim 9, characterized in that: A rotating wheel (62) is fixedly mounted on the top end of the operating rod (61), and a liquid guide ring (25) is fixedly mounted on the top surface of the supporting ring body (21).

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