A grease trap for decentralized sewage treatment tanks in rural areas

Abstract

The present invention relates to the technical field of sewage treatment, and specifically to an oil separator for a decentralized sewage treatment tank suitable for rural areas, comprising a separation tank, wherein the interior of the separation tank is divided into a filter chamber and a separation chamber, the separation tank is also provided with a liquid inlet pipe, the liquid inlet pipe is connected to the filter chamber, the separation tank is also provided with an oil outlet pipe, the oil outlet pipe is connected to the separation chamber; a rotatable chassis is provided at the bottom of the separation tank, and filter screens corresponding to the filter chamber and the separation chamber are provided on the chassis, respectively. The present invention controls the chassis to rotate, so that one of the filter screens in the filter chamber is transferred to the separation chamber, and one of the filter screens in a blocked state is transferred to the separation chamber at this time, and water is injected into the separation chamber through a water supply pipe so that the water flow flushes out the blockage from the surface of the filter screen in the process of passing through the filter screen, and the washed-down grease blockage mixed with water will be discharged through the oil outlet pipe, thereby solving the problem that the filter screen will gradually accumulate grease and cause blockage during the long-term filtration process.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an oil separator for a decentralized sewage treatment tank suitable for rural areas. Background Art

[0002] Decentralized sewage treatment tanks in rural areas are small, independent treatment systems used to treat sewage in decentralized areas. These systems usually include simple sedimentation tanks, biological treatment units and filtration devices, aiming to provide economical and practical sewage treatment solutions and reduce dependence on centralized treatment facilities.

[0003] Chinese Patent: CN201920770608.0 discloses an oil separator device for a decentralized sewage treatment tank suitable for rural areas, including an oil separator tank, which is divided into a sedimentation tank, a floating oil tank and an oil removal tank. A water inlet is provided at the top of the sedimentation tank, a filter screen is provided in the sedimentation tank, a first opening is provided at the bottom of the sedimentation tank, the first opening is connected to the floating oil tank, a bubble generating device is provided at the bottom of the floating oil tank, a second opening is provided at the top of the floating oil tank, the second opening is connected to the oil removal tank, reciprocating mechanisms are symmetrically provided on the side walls of the floating oil tank, an oil scraper is provided on the reciprocating mechanism, each reciprocating mechanism drives an oil scraper to cut back and forth, an activated carbon oil absorption plate is provided in the oil removal tank, an oil absorption felt is provided under the activated carbon oil absorption plate, and a water outlet is provided at the bottom of the oil removal tank. By arranging double degreasing, the degreasing efficiency is higher, the degreasing efficiency is greatly improved, the oil pollution that is difficult to separate in the oil pollution can be removed, and the channel blockage caused by the condensation of the oil pollution can be prevented.

[0004] According to the above patent, a reciprocating mechanism drives an oil scraper to cut back and forth to prevent the grease from solidifying, but in the end, the oil and water are still separated by filtering elements such as activated carbon oil absorption plates and oil absorption felt. Therefore, whether it is the activated carbon oil absorption plate, oil absorption felt or fiber filter, grease will gradually accumulate in the long-term filtration process, causing blockage, thereby reducing the filtration efficiency. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose an oil separator for decentralized sewage treatment tanks suitable for rural areas, so as to solve the technical problem that the filter net will gradually accumulate grease and cause blockage during the long-term filtration process, thereby reducing the filtration efficiency.

[0006] Based on the above purpose, the present invention provides an oil separator for a decentralized sewage treatment tank suitable for rural areas, comprising a separation tank, the interior of the separation tank is divided into a filtering chamber and a separation chamber, the separation tank is also provided with a liquid inlet pipe, the liquid inlet pipe is connected to the filtering chamber, and the separation tank is also provided with an oil outlet pipe, the oil outlet pipe is connected to the separation chamber;

[0007] A rotatable chassis is arranged at the bottom of the separation tank, and filter screens corresponding to the filter bin and the separation bin are arranged on the chassis, and both the filter bin and the separation bin can be connected to the outside through the filter screens.

[0008] Preferably, the upper portion of the separation tank is a liquid storage bin, the filtering bin and the separation bin are located at the lower portion of the separation tank, the liquid inlet pipe is connected to the liquid storage bin, and the liquid storage bin is connected to the filtering bin.

[0009] By extending a liquid storage tank in the separation tank, the separation tank can have a certain sewage carrying capacity, thereby improving the sewage treatment capacity.

[0010] Preferably, a gear ring is provided on the outer edge of the chassis, and the gear ring is fixedly connected to the chassis, a first servo motor is provided outside the separation tank, an output shaft of the first servo motor is provided with a gear and fixedly connected thereto, and the gear is meshed with the gear ring.

[0011] Preferably, the inner wall of the filter bin is in the shape of a circular ring, a first impeller is arranged inside the filter bin, and the blade edge of the first impeller is in contact with the inner wall of the filter bin, a connecting rod is arranged on the first impeller, the bottom end of the connecting rod is fixedly connected to the first impeller, the top end of the connecting rod passes through the separation tank, a second servo motor is arranged outside the separation tank, and the output shaft of the second servo motor is transmission-connected to the top end of the connecting rod through a synchronous pulley.

[0012] Preferably, a sealing plate is sleeved on the bottom end of the connecting rod and the sealing plate is movably and sealingly connected to the connecting rod, a sleeve is provided on the top of the sealing plate and the connecting rod is sleeved, the top end of the sleeve passes through the outside of the separation tank, a first cylinder is provided on the outside of the separation tank, and the piston rod of the first cylinder is transmission-connected to the sleeve through a connecting plate.

[0013] Preferably, the inner wall of the separation chamber is in a circular ring shape, a second impeller is arranged inside the filter chamber, and the blade edge of the second impeller is in contact with the inner wall of the filter chamber.

[0014] Preferably, the oil separator device also includes a telescopic connecting pipe, the telescopic connecting pipes correspond to the filter bin and the separation bin respectively, and a first solenoid valve is provided at the bottom end of the telescopic connecting pipe.

[0015] Preferably, the telescopic connecting pipe includes a connecting pipe and a telescopic pipe, the telescopic pipe is slidably arranged inside the connecting pipe, and the telescopic pipe is connected to the connecting pipe in a sliding and sealing manner, the first solenoid valve is arranged at the bottom end of the connecting pipe, and a second cylinder is arranged outside the connecting pipe, and the piston rod of the second cylinder is connected to the outer wall of the telescopic pipe.

[0016] Preferably, there are two telescopic connecting pipes, namely, the first telescopic connecting pipe and the second telescopic connecting pipe, and a second solenoid valve and a water pump are arranged between the first telescopic connecting pipe and the second telescopic connecting pipe;

[0017] The second solenoid valve is arranged outside the connecting pipe of one telescopic connecting pipe, and the second solenoid valve is connected to the inside of the connecting pipe. One end of the water pump is connected to the inside of the connecting pipe of the second telescopic connecting pipe through a pipeline, and the other end of the water pump is connected to the second solenoid valve through a pipeline.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention controls the chassis to rotate, so that the first filter in the filter bin is transferred to the separation bin, and the second filter moves with the rotation of the chassis to the corresponding filter bin. The second filter is a filter in a clean state, so it can effectively and timely replace the first filter in a blocked state. The first filter in a blocked state is now transferred to the separation bin, and then connected to the chassis through an external water supply pipe and connected to the separation bin. Water is injected into the separation bin through the water supply pipe so that the water flow will flush out the blockage from the surface of the filter in the process of passing through the filter. The grease blockage mixed with water will be discharged through the oil outlet pipe, which solves the problem that the filter will gradually accumulate grease and cause blockage during the long-term filtration process, thereby reducing the filtration efficiency.

[0020] 2. Two methods are formed: one is that the separation chamber can be cleaned by external water supply, and the other is that the filter screen is cleaned directly by filtered water;

[0021] One method is that the filtered water passing through the filter bin is directly discharged through a telescopic connecting pipe, and the first solenoid valve at the bottom of the telescopic connecting pipe is opened to connect with the external water supply system, so that the external water supply is directly injected into the separation bin and passes through the corresponding filter screen.

[0022] The second method is: the first solenoid valve at the bottom end of the first telescopic connecting tube is closed, the first solenoid valve at the bottom end of the second telescopic connecting tube is closed, and the second solenoid valve is opened. The filtered water passing through the filter bin is directly introduced into the second solenoid valve through the first telescopic connecting tube, and then injected into the interior of the second telescopic connecting tube through the pressurization and guidance of the water pump. The second telescopic connecting tube directly injects the filtered water into the separation bin and passes through the corresponding filter net. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 is a side view of the present invention;

[0027] Figure 4 for Figure 3 AA direction cross-sectional view;

[0028] Figure 5 The three-dimensional structure of the present invention is shown in FIG. Figure 3 ;

[0029] Figure 6 It is a front view of the present invention;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the telescopic connecting pipe of the present invention.

[0031] The numbers in the figure are:

[0032] 1-separation tank; 11-liquid inlet pipe; 12-oil outlet pipe; 13-liquid storage tank; 2-filter tank; 21-first impeller; 22-connecting rod; 221-sealing plate; 222-sleeve; 223-connecting plate; 224-first cylinder; 23-second servo motor; 24-synchronous pulley; 3-separation tank; 31-second impeller; 4-chassis; 41-filter screen; 42-gear ring; 43-first servo motor; 44-gear; 5-telescopic connecting pipe; 51-first solenoid valve; 52-connecting pipe; 53-telescopic pipe; 54-second cylinder; 55-second solenoid valve; 56-water pump. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0034] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] In a first aspect of the present invention, a grease trap device suitable for decentralized sewage treatment tanks in rural areas is provided. Figures 1 to 4 As shown, a separation tank 1 is included, the interior of the separation tank 1 is divided into a filtering chamber 2 and a separation chamber 3, the separation tank 1 is further provided with a liquid inlet pipe 11, the liquid inlet pipe 11 is connected to the filtering chamber 2, and the separation tank 1 is further provided with an oil outlet pipe 12, the oil outlet pipe 12 is connected to the separation chamber 3;

[0036] A rotatable chassis 4 is provided at the bottom of the separation tank 1 , and filter screens 41 corresponding to the filter chamber 2 and the separation chamber 3 are provided on the chassis 4 , and both the filter chamber 2 and the separation chamber 3 can be connected to the outside through the filter screens 41 .

[0037] The upper part of the separation tank 1 is a liquid storage bin 13 , the filtering bin 2 and the separation bin 3 are located at the lower part of the separation tank 1 , the liquid inlet pipe 11 is connected to the liquid storage bin 13 , and the liquid storage bin 13 is connected to the filtering bin 2 .

[0038] By extending the liquid storage tank 13 in the separation tank 1, the separation tank 1 can have a certain sewage carrying capacity, thereby improving the sewage treatment capacity.

[0039] In this embodiment, when sewage is injected into the separation tank 1 through the liquid inlet pipe 11, the sewage will first enter the liquid storage tank 13, and then the sewage will enter the filter tank 2 from the liquid storage tank 13. When the sewage is in the filter tank 2, it will pass through the corresponding filter screen 41. The filter screen 41 used in this solution is preferably a fiber filter screen. The fiber filter screen can capture and isolate grease in the water by utilizing its high surface area and fine structure. The fibers of the filter screen separate the oil droplets from the sewage.

[0040] Since the fiber filter will gradually accumulate grease and cause blockage during the long-term filtration process, which will reduce the filtration efficiency, in order to avoid this problem, it is necessary to solve it in the following ways;

[0041] By controlling the chassis 4 to rotate, the first filter screen 41 in the filter bin 2 is transferred to the separation bin 3, and the second filter screen 41 moves with the rotation of the chassis 4 to the corresponding position of the filter bin 2. The second filter screen 41 is a filter screen 41 in a clean state, so it can effectively and timely replace the first filter screen 41 in a blocked state. The first filter screen 41 in a blocked state is now transferred to the separation bin 3, and then connected to the chassis 4 and connected to the separation bin 3 through an external water supply pipe. Water is injected into the separation bin 3 through the water supply pipe so that the water flow will flush out the blockage from the surface of the filter screen 41 in the process of passing through the filter screen 41, and the grease blockage mixed with water will be discharged through the oil outlet pipe 12.

[0042] As an implementation method, Figure 2 As shown, further:

[0043] The outer edge of the chassis 4 is provided with a gear ring 42, and the gear ring 42 is fixedly connected to the chassis 4. A first servo motor 43 is provided outside the separation tank 1. The output shaft of the first servo motor 43 is provided with a gear 44 and fixedly connected thereto, and the gear 44 is meshed with the gear ring 42.

[0044] In this embodiment, since the fiber filter will gradually accumulate grease and cause blockage during the long-term filtration process, which will reduce the filtration efficiency, in order to avoid this problem, it is necessary to start the first servo motor 43, and drive the gear 44 to rotate through the output shaft of the first servo motor 43. Since the gear 44 is meshed with the ring gear 42, the gear 44 will drive the ring gear 42 to rotate with it, and the ring gear 42 drives the chassis 4 to rotate with it, so that the first filter screen 41 in the filter bin 2 is transferred to the separation bin 3, and the second filter screen 41 rotates with the chassis 4 to the corresponding filter bin 2. The second filter screen 41 is a filter screen 41 in a clean state, so it can effectively and timely replace the first filter screen 41 in a blocked state. The first filter screen 41 in a blocked state is now transferred to the separation bin 3.

[0045] In order to prevent the grease in the sewage from being contaminated by the inner wall of the filter chamber 2 and being attached to the inner wall of the filter chamber 2 in a long period of time, as an implementation method, Figure 3 and Figure 4 As shown, further:

[0046] The inner wall of the filter chamber 2 is in a circular ring shape, and a first impeller 21 is arranged inside the filter chamber 2, and the blade edge of the first impeller 21 contacts the inner wall of the filter chamber 2, and a connecting rod 22 is arranged on the first impeller 21, and the bottom end of the connecting rod 22 is fixedly connected to the first impeller 21, and the top end of the connecting rod 22 passes through the separation tank 1, and a second servo motor 23 is arranged outside the separation tank 1, and the output shaft of the second servo motor 23 is connected to the top end of the connecting rod 22 through a synchronous pulley 24.

[0047] In order to avoid the problem that sewage still enters the filter chamber 2 during the replacement of the first filter screen 41 and the second filter screen 41, resulting in a small amount of filtered water still passing through the filter screen 41 that is blocked during the rotation of the bottom plate 4, as an implementation method, Figure 3 and Figure 4 As shown, further:

[0048] The bottom end of the connecting rod 22 is sleeved with a sealing plate 221 and the sealing plate 221 is movably and sealedly connected to the connecting rod 22. The top of the sealing plate 221 is provided with a sleeve 222 and the connecting rod 22 is sleeved thereon. The top end of the sleeve 222 penetrates to the outside of the separation tank 1. The outside of the separation tank 1 is provided with a first cylinder 224, and the piston rod of the first cylinder 224 is transmission-connected to the sleeve 222 through a connecting plate 223.

[0049] In this embodiment, when sewage is injected into the separation tank 1 through the liquid inlet pipe 11, the sewage will first enter the liquid storage tank 13, and then the sewage will enter the filter tank 2 from the liquid storage tank 13. When the sewage is in the filter tank 2, it will pass through the corresponding filter screen 41;

[0050] At the same time, the second servo motor 23 drives the connecting rod 22 to rotate, and the connecting rod 22 drives the impeller to rotate with it. The scraping of grease on the inner wall of the filter chamber 2 by the edge of the impeller blades can help clean the inner wall, and the centrifugal force generated by the rotation can throw sediment and dirt away from the inner wall, which helps to keep the system clean and efficient.

[0051] Before replacing the first filter 41 and the second filter 41, the piston rod of the first cylinder 224 drives the sleeve 222 to descend through the connecting plate 223, and the sleeve 222 drives the sealing plate 221 to descend therewith, so that the sealing plate 221 closes the connecting port between the liquid storage tank 13 and the filter tank 2.

[0052] In order to prevent the grease in the grease-mixed water from being contaminated on the inner wall of the separation bin 3 during the process of passing through the separation bin 3, as an implementation method, Figure 4 As shown, further:

[0053] The inner wall of the separation chamber 3 is in a circular ring shape. A second impeller 31 is disposed inside the filter chamber 2 , and the blade edge of the second impeller 31 is in contact with the inner wall of the filter chamber 2 .

[0054] In this embodiment, the separation chamber 3 is connected to the chassis 4 through an external water supply pipe, and water is injected into the separation chamber 3 through the water supply pipe so that the water flows through the filter 41 to flush the blockage from the surface of the filter 41. Since the blades of the second impeller 31 have a certain curved surface, the grease blockage mixed with water is driven to rotate during the passage. The second impeller 31 scrapes off the grease on the inner wall of the separation chamber 3 during rotation to help clean the inner wall.

[0055] As an implementation method, Figures 5 to 7 As shown, further:

[0056] The oil separator device further includes a telescopic connecting pipe 5 , which corresponds to the filter bin 2 and the separation bin 3 respectively. A first solenoid valve 51 is provided at the bottom end of the telescopic connecting pipe 5 .

[0057] The telescopic connecting pipe 5 includes a connecting pipe 52 and a telescopic pipe 53, wherein the telescopic pipe 53 is slidably arranged inside the connecting pipe 52, and the telescopic pipe 53 is connected to the connecting pipe 52 in a sliding and sealing manner, a first solenoid valve 51 is arranged at the bottom end of the connecting pipe 52, and a second cylinder 54 is arranged outside the connecting pipe 52, and a piston rod of the second cylinder 54 is connected to the outer wall of the telescopic pipe 53.

[0058] There are two telescopic connecting pipes 5, namely the first telescopic connecting pipe 5 and the second telescopic connecting pipe 5, and a second solenoid valve 55 and a water pump 56 are arranged between the first telescopic connecting pipe 5 and the second telescopic connecting pipe 5;

[0059] The second solenoid valve 55 is arranged outside the connecting pipe 52 of one telescopic connecting pipe 5, and the second solenoid valve 55 is connected to the inside of the connecting pipe 52. One end of the water pump 56 is connected to the inside of the connecting pipe 52 of the second telescopic connecting pipe 5 through a pipeline, and the other end of the water pump 56 is connected to the second solenoid valve 55 through a pipeline.

[0060] In this embodiment, in order to achieve the communication between the water outlet of the filter chamber 2 and the water inlet of the separation chamber 3, two methods are formed: one method is to clean the filter screen 41 of the separation chamber 3 by external water supply, and the other method is to clean the filter screen 41 directly by filtering water;

[0061] One method is: the filtered water passing through the filter chamber 2 is directly discharged through a telescopic connecting pipe 5, and the first solenoid valve 51 at the bottom of the telescopic connecting pipe 5 is opened to connect with the external water supply system, so that the external water supply is directly injected into the separation chamber 3 and passes through the corresponding filter screen 41.

[0062] The second method is: the first solenoid valve 51 at the bottom end of the first telescopic connecting tube 5 is closed, the first solenoid valve 51 at the bottom end of the second telescopic connecting tube 5 is closed, and the second solenoid valve 55 is opened. The filtered water passing through the filter bin 2 is directly introduced into the second solenoid valve 55 through the first telescopic connecting tube 5, and then injected into the interior of the second telescopic connecting tube 5 through the pressurization and guidance of the water pump 56. The second telescopic connecting tube 5 directly injects the filtered water into the separation bin 3 and passes through the corresponding filter net 41.

[0063] In order to complete the above process, the following structure is required:

[0064] The telescopic connecting pipe 5 needs to be connected or separated with the water outlet of one filter screen 41 or the second filter screen 41 on the chassis 4. The second cylinder 54 controls the up and down movement of the telescopic pipe 53 to complete the connection with the corresponding water outlet on the chassis 4, so as to realize the utilization of the filtered water in the second way mentioned above.

[0065] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0066] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil separator for a decentralized sewage treatment tank suitable for rural areas, characterized in that: The separation tank (1) comprises a separation tank (1), wherein the interior of the separation tank (1) is divided into a filtering chamber (2) and a separation chamber (3); the separation tank (1) is further provided with a liquid inlet pipe (11), wherein the liquid inlet pipe (11) is connected to the filtering chamber (2); the separation tank (1) is further provided with an oil outlet pipe (12), wherein the oil outlet pipe (12) is connected to the separation chamber (3); A rotatable bottom plate (4) is provided at the bottom of the separation tank (1), and filter screens (41) corresponding to the filter chamber (2) and the separation chamber (3) are provided on the bottom plate (4), and both the filter chamber (2) and the separation chamber (3) can be connected to the outside through the filter screens (41); The inner wall of the filter chamber (2) is annular, a first impeller (21) is arranged inside the filter chamber (2), and the blade edge of the first impeller (21) is in contact with the inner wall of the filter chamber (2), a linkage rod (22) is arranged on the first impeller (21), the bottom end of the linkage rod (22) is fixedly connected to the first impeller (21), the top end of the linkage rod (22) passes through the separation tank (1), a second servo motor (23) is arranged outside the separation tank (1), and the output shaft of the second servo motor (23) is transmission-connected to the top end of the linkage rod (22) via a synchronous pulley (24); The bottom end of the linkage rod (22) is sleeved with a sealing plate (221), and the sealing plate (221) is movably sealedly connected to the linkage rod (22); the top of the sealing plate (221) is provided with a sleeve (222) and sleeved with the linkage rod (22); the top end of the sleeve (222) penetrates to the outside of the separation tank (1); a first cylinder (224) is provided outside the separation tank (1); and a piston rod of the first cylinder (224) is drivingly connected to the sleeve (222) via a connecting plate (223); The oil separator device further comprises a telescopic connecting pipe (5), the telescopic connecting pipe (5) respectively corresponding to the filter bin (2) and the separation bin (3), and a first electromagnetic valve (51) is provided at the bottom end of the telescopic connecting pipe (5); The telescopic connecting pipe (5) comprises a connecting pipe (52) and a telescopic pipe (53), wherein the telescopic pipe (53) is slidably arranged inside the connecting pipe (52), and the telescopic pipe (53) is connected to the connecting pipe (52) in a sliding and sealing manner, a first solenoid valve (51) is arranged at the bottom end of the connecting pipe (52), a second cylinder (54) is arranged outside the connecting pipe (52), and a piston rod of the second cylinder (54) is connected to the outer wall of the telescopic pipe (53); There are two telescopic connecting pipes (5), namely a first telescopic connecting pipe (5) and a second telescopic connecting pipe (5), and a second solenoid valve (55) and a water pump (56) are provided between the first telescopic connecting pipe (5) and the second telescopic connecting pipe (5); The second solenoid valve (55) is arranged outside the connecting pipe (52) of the first telescopic connecting pipe (5), and the second solenoid valve (55) is connected to the inside of the connecting pipe (52). One end of the water pump (56) is connected to the inside of the connecting pipe (52) of the second telescopic connecting pipe (5) through a pipeline, and the other end of the water pump (56) is connected to the second solenoid valve (55) through a pipeline.

2. The oil separator for a decentralized sewage treatment tank suitable for rural areas according to claim 1, characterized in that: The upper part of the separation tank (1) is a liquid storage bin (13), the filtering bin (2) and the separation bin (3) are located at the lower part of the separation tank (1), the liquid inlet pipe (11) is connected to the liquid storage bin (13), and the liquid storage bin (13) is connected to the filtering bin (2); By extending the liquid storage tank (13) in the separation tank (1), the separation tank (1) can have a certain sewage carrying capacity, thereby improving the sewage treatment capacity.

3. The oil separator for a decentralized sewage treatment tank suitable for rural areas according to claim 1, characterized in that: The outer edge of the chassis (4) is provided with a gear ring (42), and the gear ring (42) is fixedly connected to the chassis (4). A first servo motor (43) is provided outside the separation tank (1), and an output shaft of the first servo motor (43) is provided with a gear (44) and fixedly connected thereto, and the gear (44) is meshed with the gear ring (42).

4. The oil separator for a decentralized sewage treatment tank suitable for rural areas according to claim 1, characterized in that: The inner wall of the separation chamber (3) is in the shape of a circular ring, and a second impeller (31) is arranged inside the filtering chamber (2), and the blade edges of the second impeller (31) are in contact with the inner wall of the filtering chamber (2).

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