Automatic cleaning equipment based on multi-stage filtering of filtering type wellhead device and using method

Abstract

The invention relates to the technical field of wellhead devices, in particular to automatic cleaning equipment based on multi-stage filtering of a filtering type wellhead device and a using method. The automatic cleaning equipment comprises a water outlet pipe and a filtering assembly, the bottom end of the water outlet pipe is fixedly connected with the filtering assembly, and the bottom end of the filtering assembly is fixedly connected with a mechanism; the bottom end of the filter assembly is fixedly connected with a mounting support, the mechanism section is fixedly connected with a supporting column rod, the bottom end of the supporting column rod is fixedly connected with a connecting disc, the bottom end of the connecting disc is fixedly connected with a suction fan, the inner side of the connecting disc is fixedly connected with a communicating pipeline, and the filter assembly comprises a transfer shell. According to the device, impurity particles on the first filter plate of the wellhead device can be continuously scraped, the filtering performance of the first filter plate is ensured, the situation that the first filter plate is blocked by impurities and normal work of the wellhead device is affected is prevented, small particles in the first filter plate are discharged, and the filtering performance and the service life of the first filter plate are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of wellhead devices, and in particular to automatic cleaning equipment based on multi-stage filtration of a filtering wellhead device and a use method thereof. Background Art

[0002] The multi-stage filtering automatic cleaning equipment of the filtering wellhead device generally refers to a device that integrates a multi-stage filtering system and an automatic cleaning function. It is used for water quality treatment at the wellhead. This device can automatically filter out solid particles, suspended matter and other impurities in the water. At the same time, it has an automatic cleaning function to maintain the filtering effect and extend the service life of the equipment. The oil wellhead usually refers to the opening part of the oil well, that is, the end of the channel connecting the underground oil layer and the ground. In the process of oil well mining, production and maintenance, the wellhead facilities play a vital role; The existing wellhead filtering structure cleans the impurities inside the wellhead by scraping. Although the impurities blocked in the filtering structure can be removed in time, the particulate impurities penetrate into the filtering structure and cannot be scraped off, which will still affect the filtering performance of the filtering structure for a long time. Therefore, in view of the above problems, an automatic cleaning device and a method of use based on multi-stage filtration of a filtering wellhead device are proposed. Summary of the invention

[0003] The object of the present invention is to provide an automatic cleaning device and a method of use based on multi-stage filtration of a filtering wellhead device, so as to solve the problem that the existing wellhead filtering structure cleans the impurities inside the wellhead by scraping. Although the impurities blocked in the filtering structure can be removed in time, the particulate impurities penetrate into the filtering structure and cannot be scraped off, which will still affect the filtering performance of the filtering structure for a long time.

[0004] To achieve the above object, the present invention provides the following technical solutions: An automatic cleaning device based on multi-stage filtration of a filtering wellhead device and a use method thereof, comprising a water outlet pipe and a filter assembly, wherein the bottom end of the water outlet pipe is fixedly connected to the filter assembly, the bottom end of the filter assembly is fixedly connected to a mechanism, one side of the mechanism is fixedly connected to a water inlet pipe, the bottom end of the filter assembly is fixedly connected to a mounting bracket, the mechanism section is fixedly connected to a support rod, the bottom end of the support rod is fixedly connected to a connecting plate, the bottom end of the connecting plate is fixedly connected to a suction fan, the inner side of the connecting plate is fixedly connected to a connecting pipe, the filter assembly comprises a transfer shell, the inner side of the transfer shell is provided with a replacement groove, the upper end of the transfer shell is installed with a rubber threaded block, the inner side of the transfer shell is provided with a double port, the rear end of the transfer shell is fixedly connected to an electric telescopic rod, and one side of the electric telescopic rod is fixedly connected A filtering installation device is fixedly connected, the mechanism includes a water waiting shell, the bottom end of the water waiting shell is fixedly connected to a motor, the end of the motor main shaft is fixedly connected to a first gear, the outer side of the first gear is meshed with the outer side of the second gear, the inner side of the second gear is fixedly connected to an idle roller, the inner side of the water waiting shell is fixedly connected to a limited rotation support plate, the top of the idle roller is fixedly connected to a debris suction device, the debris suction device includes a circular rotating plate, the inner side of the circular rotating plate is fixedly connected to a built-in shell plate, the inner side of the built-in shell plate is provided with a centralized through groove, the upper end of the built-in shell plate is provided with an impurity inlet, the top of the built-in shell plate is fixedly connected to an annular silicone strip, the top of the built-in shell plate is fixedly connected to a scraper, the bottom end of the water outlet pipe is fixedly connected to the top end of the transfer shell, and the bottom end of the transfer shell is fixedly connected to the top of the mechanism.

[0005] As a further optimization of the present invention, the inner side of the water outlet pipe is connected to the inner side of the exchange groove through a double port, the exchange groove is connected to the inner side of the water waiting shell through a double port, and the transfer shell is shaped as a hollow rectangular body.

[0006] As a further optimization of the present invention, a through hole is opened at the rear end of the transfer shell, a sealing ring is installed in the through hole at the rear end of the transfer shell, the exchange groove is connected to the double ports, and one end of the electric telescopic rod slides inside the through hole at the rear end of the transfer shell.

[0007] As a further optimization of the present invention, two threaded holes are opened on the upper end of the middle transfer shell, the upper end of the rubber threaded block is shaped as a cylindrical rubber block, the lower end of the rubber threaded block is shaped as a threaded column, and the lower end of the rubber threaded block is spirally fitted with the threaded hole on the upper end of the middle transfer shell.

[0008] As a further optimization of the present invention, the filtering installation device includes a square slide plate, the inner side of the square slide plate is fixedly connected to a fixed cylinder plate by bolts, the inner side of the fixed cylinder plate is provided with a channel opening, the bottom end of the fixed cylinder plate is fixedly connected to a second filter plate, and the bottom end of the second filter plate is fixedly connected to the first filter plate.

[0009] As further optimized content of the present invention, ear seats with threaded holes are installed at both ends of the fixed cylinder plate, two through holes are opened on the inner side of the square slide plate, the square slide plate is in the shape of a rectangular body, the outer side of the square slide plate slides on the inner side of the exchange groove, the exchange groove is in the shape of a rectangular body, and a sealing ring is fixed on the inner side of the transfer shell near the double ports, and there are two sealing rings on the inner side of the transfer shell.

[0010] As a further optimized content of the present invention, the water inlet pipe is connected to the inside of the water waiting shell, the air outlet of the suction fan is fixedly connected to the bottom end of the connecting pipe, the outer side of the connecting pipe rotates on the inner side of the idle roller, a sealing ring is installed on the outer side of the upper end of the connecting pipe, and the inner side of the connecting pipe is connected to the inner side of the idle roller.

[0011] As a further optimized content of the present invention, the idle roller is shaped as a hollow cylinder, the outer side of the idle roller is fitted with the inner side of the lower end of the water shell through a sealing ring, the inner side of the idle roller is connected to the inside of the centralized through groove, and the centralized through groove is connected to the impurity inlet.

[0012] As further optimized content of the present invention, there are two scrapers, the annular silicone strip is an annular structure, the top of the annular silicone strip and the scraper are both in contact with the bottom of the first filter plate, and the shape of the circular rotating plate is a hollow cylinder.

[0013] Method for using automatic cleaning equipment based on multi-stage filtration of filtering wellhead device, S1: When cleaning the impurities on the first filter plate, the water onion water inlet pipe enters the interior of the mechanism, passes through the first filter plate, the second filter plate and the inside of the channel port, and the second filter plate filters the water again. The fixed cylinder plate is fixed to the square slide plate by bolts, which is convenient for disassembling the fixed cylinder plate. During the use of the device, the external power supply is energized, and the motor drives the first gear to rotate, and the first gear drives the second gear meshing on the outside to rotate, and the second gear drives the idle roller fixedly connected on the inside to rotate, and the outside of the idle roller is rotatably connected to the rotation limiting support plate, and the outside of the idle roller is fitted with the inner side of the lower end of the water shell, and at the same time, the outside of the idle roller is fitted with the sealing ring at the lower end of the water shell, and the rotation of the idle roller drives the built-in shell plate fixedly connected at the top to rotate, and the built-in shell plate drives the circular rotating plate to rotate, and the outer side of the circular rotating plate is fitted with the inner side of the double-through-port at the bottom of the exchange groove, and the rotation of the built-in shell plate drives the annular silicone strip and the scraper fixedly connected at the top to rotate, and the top of the annular silicone strip and the scraper are fitted with the bottom end of the first filter plate, and the water outside the part of the scraper annular silicone strip released from the first filter plate is difficult to enter the annular interior of the annular silicone strip; S2: When the particles inside the first filter plate are discharged, the suction fan sucks air from the inside of the connecting pipe, and the upper end of the connecting pipe is rotatably connected to the inner side of the idle roller. At the same time, the upper end of the connecting pipe is fitted with the inner side of the lower end of the idle roller through a sealing ring. Under the suction of the suction fan, water entering the inner part of the water outlet pipe enters from the inside of the channel opening, passes through the second filter plate and the first filter plate, and under the reverse osmosis of water, the impurity particles inside the first filter plate are discharged. The discharged impurities enter the inside of the impurity inlet from the inside of the annular silicone strip, enter the inside of the concentrated through groove from the impurity inlet, flow into the connecting pipe through the inside of the idle roller, and are discharged from the air outlet of the suction fan. S3: When replacing the first filter plate, the electric telescopic rod pushes the filter installation device to move. When replacing the filter assembly at the left end, the filter installation device is pushed forward. When replacing the filter assembly at the rear end, the filter installation device is pulled backward. Under the action of the sealing ring on one side of the double-port, the square slide plate remains sealed with the inner side of the transfer shell. When the through hole opened on the inner side of the square slide plate is aligned with the corresponding rubber threaded block, the rubber threaded block is rotated, and the fixed cylinder plate is disassembled with a screwdriver. The fixed cylinder plate and the bottom structure are replaced at the same time. At this time, the filter structure can be replaced without affecting the normal operation of the water outlet pipe. The rubber threaded block serves to seal the through hole at the upper end of the transfer shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by means of the motor, the first gear, the second gear, the idle roller and the impurity suction device, the device can continuously scrape the impurity particles on the first filter plate of the wellhead device, thereby ensuring the filtering performance of the first filter plate and preventing the impurities from clogging the first filter plate and affecting the normal operation of the wellhead device; 2. In the present invention, by means of the suction fan, the connecting pipe, the idle roller and the built-in shell plate, the device can continuously generate suction force inside the centralized through slot, so that the seal where the first filter plate and the annular silicone strip fit together absorbs water, thereby discharging the tiny particles inside the first filter plate, thereby ensuring the filtering performance and service life of the first filter plate; 3. In the present invention, by providing the electric telescopic rod, the filter installation device, the transfer shell and the rubber threaded block, when the filter assembly inside the square slide plate needs to be replaced, the device facilitates the replacement of the filter assembly inside the square slide plate, and the wellhead device can work normally when replaced without affecting the normal operation of the wellhead device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the suction fan of the present invention; Figure 3 This is a schematic diagram of the water inlet pipe structure of the present invention; Figure 4 This is a schematic diagram of the water-waiting shell structure of the present invention; Figure 5 It is a schematic diagram of the structure of the impurity gettering device of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure at A; Figure 7 This is a schematic diagram of the transfer shell structure of the present invention; Figure 8 It is a schematic diagram of the structure of the filtering installation device of the present invention.

[0016] In the figure: 1. water outlet pipe; 2. Filter assembly; 21. Transfer shell; 22. Exchange groove; 23. Rubber thread block; 24. Double port; 25. Electric telescopic rod; 26. Filter installation device; 261. Square slide plate; 262. Fixed cylinder plate; 263. Passageway; 264. Second filter plate; 265. First filter plate; 3. Mechanism; 31. Water-waiting shell; 32. Motor; 33. First gear; 34. Second gear; 35. Idle roller; 36. Rotation-limiting support plate; 37. Impurity suction device; 371. Circular rotating plate; 372. Built-in shell plate; 373. Centralized through slot; 374. Impurity inlet; 375. Annular silicone strip; 376. Scraper; 4. Water inlet pipe; 5. Mounting bracket; 6. Support rod; 7. Connecting plate; 8. Suction fan; 9. Connecting pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] See also Figure 1-8 , the present invention provides a technical solution: The invention discloses an automatic cleaning device for multi-stage filtration of a filtering wellhead device and a method for using the same, comprising a water outlet pipe 1 and a filter assembly 2, wherein the bottom end of the water outlet pipe 1 is fixedly connected to the filter assembly 2, the bottom end of the filter assembly 2 is fixedly connected to a mechanism 3, one side of the mechanism 3 is fixedly connected to a water inlet pipe 4, the bottom end of the filter assembly 2 is fixedly connected to a mounting bracket 5, the section of the mechanism 3 is fixedly connected to a support rod 6, the bottom end of the support rod 6 is fixedly connected to a connecting plate 7, the bottom end of the connecting plate 7 is fixedly connected to a suction fan 8, the inner side of the connecting plate 7 is fixedly connected to a connecting pipe 9, the filter assembly 2 comprises a transfer shell 21, the inner side of the transfer shell 21 is provided with a replacement groove 22, the upper end of the transfer shell 21 is provided with a rubber threaded block 23, the inner side of the transfer shell 21 is provided with a double port 24, the rear end of the transfer shell 21 is fixedly connected to an electric telescopic rod 25, one side of the electric telescopic rod 25 is fixedly connected to a filter mounting device 26, the machine The structure 3 includes a water-waiting shell 31, a motor 32 is fixedly connected to the bottom end of the water-waiting shell 31, a first gear 33 is fixedly connected to the end of the main shaft of the motor 32, the outer side of the first gear 33 is meshed with the outer side of the second gear 34, an idle roller 35 is fixedly connected to the inner side of the second gear 34, a limited rotation support plate 36 is fixedly connected to the inner side of the water-waiting shell 31, a debris suction device 37 is fixedly connected to the top of the idle roller 35, and the debris suction device 37 includes a circular rotating plate 371, a built-in shell plate 372 is fixedly connected to the inner side of the circular rotating plate 371, a concentrated through groove 373 is provided on the inner side of the built-in shell plate 372, a debris inlet 374 is provided on the upper end of the built-in shell plate 372, an annular silicone strip 375 is fixedly connected to the top of the built-in shell plate 372, a scraper 376 is fixedly connected to the top of the built-in shell plate 372, the bottom end of the water outlet pipe 1 is fixedly connected to the top of the intermediate transfer shell 21, and the bottom end of the intermediate transfer shell 21 is fixedly connected to the top of the mechanism 3.

[0020] As a further implementation of the present invention, the inner side of the water outlet pipe 1 is connected to the inner side of the exchange groove 22 through the double opening 24, the exchange groove 22 is connected to the inner side of the water waiting shell 31 through the double opening 24, the transfer shell 21 is in the shape of a hollow rectangular body, a through hole is provided at the rear end of the transfer shell 21, a sealing ring is installed at the rear end through hole of the transfer shell 21, the exchange groove 22 is connected to the double opening 24, one end of the electric telescopic rod 25 slides inside the rear end through hole of the transfer shell 21, two threaded holes are provided at the upper end of the transfer shell 21, and the rubber thread block 2 The upper end of the rubber block 3 is a cylindrical shape, and the lower end of the rubber threaded block 23 is a threaded column. The lower end of the rubber threaded block 23 is spirally fitted with the threaded hole at the upper end of the intermediate shell 21, so that the water input by the water inlet pipe 4 passes through the filter installation device 26 inside the mechanism 3, filters the water, and then flows out from the water outlet pipe 1. Under the action of the sealing ring, the filter installation device 26 and the intermediate shell 21 are kept sealed to prevent the water from overflowing from the replacement groove 22 when the filter structure inside the filter installation device 26 is replaced; As a further implementation of the present scheme, the filtering installation device 26 includes a square slide plate 261, the inner side of the square slide plate 261 is fixedly connected with a fixed cylinder plate 262 by bolts, a passage opening 263 is provided on the inner side of the fixed cylinder plate 262, a second filter plate 264 is fixedly connected to the bottom end of the fixed cylinder plate 262, a first filter plate 265 is fixedly connected to the bottom end of the second filter plate 264, ear seats with threaded holes are installed at both ends of the fixed cylinder plate 262, two through holes are provided on the inner side of the square slide plate 261, the shape of the square slide plate 261 is a rectangular body, the outer side of the square slide plate 261 slides on the inner side of the exchange groove 22, the shape of the exchange groove 22 is a rectangular body, a sealing ring is fixed on the inner side of the transfer shell 21 near the double port 24, the number of sealing rings on the inner side of the transfer shell 21 is two, a multi-stage filtering structure is provided, the filtering effect on water is improved, and the fixed cylinder plate 262 can be disassembled at the same time, and the fixed cylinder plate 262 and the components at the lower end can be replaced; As a further implementation of this solution, the water inlet pipe 4 is connected to the inside of the water waiting shell 31, the air outlet of the suction fan 8 is fixedly connected to the bottom end of the connecting pipe 9, the outer side of the connecting pipe 9 rotates on the inner side of the idle roller 35, and a sealing ring is installed on the outer side of the upper end of the connecting pipe 9. The inner side of the connecting pipe 9 is connected to the inner side of the idle roller 35, which facilitates the air inlet of the suction fan 8 to be connected to the inside of the idle roller 35 through the connecting pipe 9, while not affecting the rotation of the idle roller 35; As a further implementation of the present scheme, the idle roller 35 is in the shape of a hollow cylinder, the outer side of the idle roller 35 is fitted with the inner side of the lower end of the water-receiving shell 31 through a sealing ring, the inner side of the idle roller 35 is connected with the interior of the centralized through groove 373, and the centralized through groove 373 is connected with the impurity inlet 374, so that there is flow space for the impurities discharged from the first filter plate 265 to be discharged; As a further implementation scheme of the present scheme, the number of scrapers 376 is two, the annular silicone strip 375 is an annular structure, the top ends of the annular silicone strip 375 and the scraper 376 are both in contact with the bottom end of the first filter plate 265, and the shape of the rotating plate 371 is a hollow cylinder, which can reduce the water from entering the annular silicone strip 375; maintain the suction force on the first filter plate 265 to ensure that the water inside the outlet pipe 1 passes through the second filter plate 264 and the first filter plate 265 to discharge impurities.

[0021] Working process: when cleaning the impurities on the first filter plate 265, the water onion inlet pipe 4 enters the interior of the mechanism 3, passes through the first filter plate 265, the second filter plate 264 and the interior of the channel opening 263, and the second filter plate 264 filters the water again. The fixed cylinder plate 262 is fixed to the square slide plate 261 by bolts, which is convenient for disassembling the fixed cylinder plate 262. During the use of the device, the external power supply is energized, the motor 32 drives the first gear 33 to rotate, the first gear 33 drives the second gear 34 meshed on the outside to rotate, and the second gear 34 drives the idle roller 35 fixedly connected on the inside to rotate, the outer side of the idle roller 35 is rotatably connected to the rotation limiting support plate 36, and the outer side of the idle roller 35 The inner side of the lower end of the water-waiting shell 31 is fitted, and the outer side of the idle roller 35 is fitted with the sealing ring at the lower end of the water-waiting shell 31. The idle roller 35 rotates to drive the built-in shell plate 372 fixedly connected to the top to rotate, and the built-in shell plate 372 drives the circular rotating plate 371 to rotate. The outer side of the circular rotating plate 371 is fitted with the inner side of the double-through-port 24 at the lower part of the exchange groove 22. The rotation of the built-in shell plate 372 drives the annular silicone strip 375 and the scraper 376 fixedly connected to the top to rotate. The top ends of the annular silicone strip 375 and the scraper 376 are fitted with the bottom end of the first filter plate 265. The water outside the part of the scraper 376 that releases the annular silicone strip 375 from the first filter plate 265 is difficult to enter the annular interior of the annular silicone strip 375. When the particles inside the first filter plate 265 are discharged, the suction fan 8 sucks air from the inside of the connecting pipe 9, and the upper end of the connecting pipe 9 is rotatably connected to the inner side of the idle roller 35. At the same time, the upper end of the connecting pipe 9 is fitted with the inner side of the lower end of the idle roller 35 through a sealing ring. Under the suction of the suction fan 8, the water entering the inner part of the water outlet pipe 1 enters from the inside of the channel opening 263, passes through the second filter plate 264 and the first filter plate 265, and under the reverse osmosis of water, the impurity particles inside the first filter plate 265 are discharged. The discharged impurities enter the inside of the impurity inlet 374 from the inside of the annular silicone strip 375, enter the inside of the concentrated through groove 373 from the impurity inlet 374, flow into the connecting pipe 9 through the inside of the idle roller 35, and are discharged from the air outlet of the suction fan 8. When replacing the first filter plate 265, the electric telescopic rod 25 pushes the filter installation device 26 to move. When replacing the filter component 2 at the left end, the filter installation device 26 is pushed forward. When replacing the filter component 2 at the rear end, the filter installation device 26 is pulled backward. Under the action of the sealing ring on one side of the double-port 24, the square slide plate 261 remains sealed with the inner side of the transfer shell 21. When the through hole opened on the inner side of the square slide plate 261 is aligned with the corresponding rubber threaded block 23, the rubber threaded block 23 is rotated, and the fixed cylinder plate 262 is disassembled by a screwdriver. The fixed cylinder plate 262 and the bottom end structure are replaced at the same time. At this time, the filter structure can be replaced without affecting the normal operation of the water outlet pipe 1. The rubber threaded block 23 plays a role in sealing the through hole at the upper end of the transfer shell 21.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic cleaning device based on multi-stage filtration of a filtering wellhead device, comprising a water outlet pipe (1) and a filtering assembly (2), characterized in that: The bottom end of the water outlet pipe (1) is fixedly connected to a filter assembly (2), the bottom end of the filter assembly (2) is fixedly connected to a mechanism (3), one side of the mechanism (3) is fixedly connected to a water inlet pipe (4), the bottom end of the filter assembly (2) is fixedly connected to a mounting bracket (5), the bottom end of the mechanism (3) is fixedly connected to a support rod (6), the bottom end of the support rod (6) is fixedly connected to a connecting plate (7), the bottom end of the connecting plate (7) is fixedly connected to a suction fan (8), and the inner side of the connecting plate (7) is fixedly connected to a connecting rod (6). The filter assembly (2) comprises a transfer shell (21), the inner side of the transfer shell (21) is provided with a replacement groove (22), the upper end of the transfer shell (21) is provided with a rubber threaded block (23), the inner side of the transfer shell (21) is provided with a double opening (24), the rear end of the transfer shell (21) is fixedly connected to an electric telescopic rod (25), one side of the electric telescopic rod (25) is fixedly connected to a filter installation device (26), the mechanism (3) comprises a water waiting shell (31), the water waiting shell (31) 1) A motor (32) is fixedly connected to the bottom end, a first gear (33) is fixedly connected to the end of the main shaft of the motor (32), the outer side of the first gear (33) is meshed with the outer side of the second gear (34), an idle roller (35) is fixedly connected to the inner side of the second gear (34), the inner side of the water waiting shell (31) is fixedly connected to a limited rotation support plate (36), the top end of the idle roller (35) is fixedly connected to a debris suction device (37), the debris suction device (37) comprises a circular rotating plate (371), the circular rotating plate (371 ) is fixedly connected to the inner side of a built-in shell plate (372), a centralized through groove (373) is provided on the inner side of the built-in shell plate (372), a debris inlet (374) is provided on the upper end of the built-in shell plate (372), an annular silicone strip (375) is fixedly connected to the top end of the built-in shell plate (372), a scraper (376) is fixedly connected to the top end of the built-in shell plate (372), the bottom end of the water outlet pipe (1) is fixedly connected to the top end of the transfer shell (21), and the bottom end of the transfer shell (21) is fixedly connected to the top end of the mechanism (3).

2. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: The inner side of the water outlet pipe (1) is connected to the inner side of the exchange groove (22) through a double opening (24); the exchange groove (22) is connected to the inner side of the water waiting shell (31) through a double opening (24); and the transfer shell (21) is in the shape of a hollow rectangular body.

3. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: A through hole is provided at the rear end of the transfer shell (21), a sealing ring is installed in the through hole at the rear end of the transfer shell (21), the exchange groove (22) is connected to the double opening (24), and one end of the electric telescopic rod (25) slides inside the through hole at the rear end of the transfer shell (21).

4. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: The upper end of the intermediate transfer shell (21) is provided with two threaded holes, the upper end of the rubber threaded block (23) is in the shape of a cylindrical rubber block, the lower end of the rubber threaded block (23) is in the shape of a threaded column, and the lower end of the rubber threaded block (23) is spirally fitted with the threaded holes at the upper end of the intermediate transfer shell (21).

5. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: The filter installation device (26) comprises a square slide plate (261), the inner side of the square slide plate (261) being fixedly connected to a fixed cylinder plate (262) via bolts, the inner side of the fixed cylinder plate (262) being provided with a passage opening (263), the bottom end of the fixed cylinder plate (262) being fixedly connected to a second filter plate (264), and the bottom end of the second filter plate (264) being fixedly connected to a first filter plate (265).

6. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 5 is characterized in that: Ear seats with threaded holes are installed at both ends of the fixed cylinder plate (262), two through holes are provided on the inner side of the square slide plate (261), the square slide plate (261) is in the shape of a rectangular body, the outer side of the square slide plate (261) slides on the inner side of the exchange groove (22), the exchange groove (22) is in the shape of a rectangular body, and a sealing ring is fixed on the inner side of the transfer shell (21) near the double opening (24), and the number of sealing rings on the inner side of the transfer shell (21) is two.

7. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: The water inlet pipe (4) is connected to the interior of the water waiting shell (31); the air outlet of the suction fan (8) is fixedly connected to the bottom end of the connecting pipe (9); the outer side of the connecting pipe (9) rotates on the inner side of the idle roller (35); a sealing ring is installed on the outer side of the upper end of the connecting pipe (9); and the inner side of the connecting pipe (9) is connected to the inner side of the idle roller (35).

8. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: The idle roller (35) is in the shape of a hollow cylinder; the outer side of the idle roller (35) is fitted to the inner side of the lower end of the water waiting shell (31) via a sealing ring; the inner side of the idle roller (35) is connected to the interior of the centralized through groove (373); and the centralized through groove (373) is connected to the impurity inlet (374).

9. The automatic cleaning device based on multi-stage filtration of the filtering wellhead device according to claim 1 is characterized in that: The number of the scrapers (376) is two, the annular silicone strip (375) is an annular structure, the top ends of the annular silicone strip (375) and the scrapers (376) are both in contact with the bottom end of the first filter plate (265), and the shape of the circular rotating plate (371) is a hollow cylinder.

10. A method for using the automatic cleaning device based on multi-stage filtration of a filtering wellhead device according to any one of claims 1 to 9, characterized in that: S1: When cleaning impurities on the first filter plate (265), the water onion inlet pipe (4) enters the interior of the mechanism (3), passes through the first filter plate (265), the second filter plate (264) and the interior of the passage opening (263), and the second filter plate (264) filters water again. The fixed cylinder plate (262) is fixed to the square slide plate (261) by bolts, so that the fixed cylinder plate (262) can be easily disassembled. During use of the device, the external power supply is energized, the motor (32) drives the first gear (33) to rotate, the first gear (33) drives the second gear (34) meshed on the outside to rotate, the second gear (34) drives the idle roller (35) fixedly connected on the inside to rotate, the outside of the idle roller (35) is rotationally connected to the rotation limiting support plate (36), and the outside of the idle roller (35) is connected to the waiting The inner side of the lower end of the water shell (31) is fitted, and at the same time, the outer side of the idle roller (35) is fitted with the sealing ring at the lower end of the water shell (31). The idle roller (35) rotates to drive the built-in shell plate (372) fixedly connected to the top to rotate. The built-in shell plate (372) drives the circular rotating plate (371) to rotate. The outer side of the circular rotating plate (371) is fitted with the inner side of the double openings (24) at the lower part of the exchange groove (22). The rotation of the built-in shell plate (372) drives the annular silicone strip (375) and the scraper (376) fixedly connected to the top to rotate. The top ends of the annular silicone strip (375) and the scraper (376) are fitted with the bottom end of the first filter plate (265). It is difficult for the external water of the part where the scraper (376) and the annular silicone strip (375) are released from the first filter plate (265) to enter the annular interior of the annular silicone strip (375). S2: When the particles inside the first filter plate (265) are discharged, the suction fan (8) sucks air from the inside of the connecting pipe (9), and the upper end of the connecting pipe (9) is rotatably connected to the inner side of the idle roller (35). At the same time, the upper end of the connecting pipe (9) is fitted to the inner side of the lower end of the idle roller (35) through a sealing ring. Under the suction of the suction fan (8), water entering the inner part of the water outlet pipe (1) enters from the inside of the channel opening (263), passes through the second filter plate (264) and the first filter plate (265), and under the reverse osmosis of the water, the impurity particles inside the first filter plate (265) are discharged. The discharged impurities enter the inside of the impurity inlet (374) from the inside of the annular silica gel strip (375), enter the inside of the concentrated through groove (373) from the impurity inlet (374), flow into the connecting pipe (9) through the inside of the idle roller (35), and are discharged from the air outlet of the suction fan (8); S3: When the first filter plate (265) is replaced, the electric telescopic rod (25) pushes the filter installation device (26) to move. When the filter assembly at the left end is replaced, the filter installation device (26) is pushed forward. When the filter assembly at the rear end is replaced, the filter installation device (26) is pulled backward. Under the action of the sealing ring on one side of the double opening (24), the square slide plate (261) maintains a seal with the inner side of the transfer shell (21). When the through hole opened on the inner side of the square slide plate (261) is aligned with the corresponding rubber thread block (23), the rubber thread block (23) is rotated and the fixed cylinder plate (262) is disassembled by a screwdriver. The fixed cylinder plate (262) and the bottom structure are replaced at the same time. At this time, the filter structure can be replaced without affecting the normal operation of the water outlet pipe (1). The rubber thread block (23) plays a role in blocking the through hole at the upper end of the transfer shell (21).

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