Water quality filtering and purifying water injection wellhead

Abstract

The invention relates to the technical field of water injection wells, and discloses a water quality filtering and purifying water injection wellhead which comprises a water injection wellhead body. A processing box; the purifying and filtering assembly is used for filtering water injected from the water injection wellhead and separating impurities; the purifying and filtering assembly comprises a filtering device, a pressure conversion device, a treatment device and a discharging device; the filtering device is used for filtering water; the pressure conversion device automatically controls the filtering device to rotate according to the blocking state of the filtering device, and the blocking position is changed. According to the water quality filtering and purifying water injection wellhead, through the arranged purifying and filtering assembly, double-filter-screen type filtering of a water source at the wellhead water injection stage can be achieved, in the whole filtering process, rotation of the circular filter screen can be automatically controlled according to the blockage condition of the filter screen, and the clean filter screen is automatically rotated to the position below an inlet of the water source; water pressure is used as a power source, automatic continuous small-amplitude rotation of the filter screen is controlled, and the stability of wellhead water injection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water injection wells, in particular to a water quality filtering and purification water injection wellhead. Background Art

[0002] The filtering device is truly capable of intercepting impurities and harmful particles contained in the liquid, thereby separating the liquid from the impurities and particles. As a result, the filtering device at the oil field water injection wellhead can be used to inject pure water under the same principle to prevent the deficit caused by underground crude oil extraction, so that the oil well can maintain its original pressure. In addition, the injection of pure water can prevent the accumulation of water impurities inside the well head and cause blockage.

[0003] At present, water injection wells basically need to filter and purify the water quality during the water injection process. However, the injected water source will inevitably produce certain impurities, and the injection wells have relatively high requirements for the injected water quality, so filtering and purification equipment are generally used to filter the water quality. However, the existing water quality filtering method is extremely simple, using a single filtering and purification method of a filter net. However, this method has a great defect, that is, the filter net needs to be cleaned or replaced from time to time. If the filter net is directly blocked, the internal water pressure will gradually increase, which will affect the overall use of the valve and the water injection wellhead, and the water injection wellhead needs to be shut down for maintenance in the later stage, resulting in certain limitations. Therefore, a water quality filtration and purification water injection wellhead is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a water quality filtration and purification water injection wellhead, which solves the problem that the water injection wellhead in the existing technology cannot achieve circulating automatic purification and filtration of the injected water quality, resulting in the need for manual intervention for irregular maintenance, affecting the efficiency of water injection.

[0005] (2) Technical solution To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a water quality filtration and purification injection wellhead, comprising an injection wellhead; a treatment box; a purification and filtration assembly, for filtering the water quality injected into the injection wellhead and separating impurities; the purification and filtration assembly comprises a filtering device, a pressure conversion device, a treatment device and a discharge device; the filtering device filters the water quality; the pressure conversion device automatically controls the rotation of the filtering device according to the blockage state of the filtering device, and replaces the blocked position; the treatment device is used to process impurities on the filtering device; and the discharge device is used to automatically transfer the treated impurities.

[0006] The filtering device includes a circular filter screen, four partitions are fixedly connected to the surface of the circular filter screen, and the partitions are rotatably connected to the inside of the treatment box. The treatment box has inlets and outlets at the upper and lower positions. Water is injected from the upper right of the water injection wellhead to the bottom and passes through the circular filter screen to achieve double-layer filtration of the water source.

[0007] Preferably, the pressure conversion device includes an automatic control device and a position conversion device. The automatic control device includes a connecting sleeve, which is connected to the processing box and is located above the circular filter. The interior of the connecting sleeve is slidably connected to a piston plate, and one side of the piston plate is fixedly connected to a piston rod. The surface of the piston rod is sleeved with a compression spring, and the compression spring is located inside the connecting sleeve. One end of the piston rod is connected to a bracket through the connecting sleeve, and the bracket is connected to the position conversion device.

[0008] Preferably, the shifting device includes a worm, a ratchet is fixedly connected to the worm, a ratchet plate is provided on the surface of the ratchet, the ratchet plate is provided on the bracket through a connecting piece, the surface of the worm is engaged with a worm wheel, the inside of the worm wheel is fixedly connected to a connecting shaft, the connecting shaft is fixedly connected to the circular filter, and the connecting shaft is rotatably connected to the processing box.

[0009] Preferably, the connecting member includes a compression rod, which is slidably connected to the bracket, a telescopic spring is sleeved on the surface of the compression rod, the bottom of the compression rod is connected to the ratchet plate, and the telescopic spring is located between the bracket and the ratchet plate.

[0010] Preferably, a box body is provided on the side of the processing box, the pressure conversion device is located inside the box body, and both ends of the worm are rotatably connected to the inside of the box body.

[0011] Preferably, the processing device includes a sliding sleeve, which is slidably connected to the surface of the connecting shaft, and a spiral groove is provided on the surface of the connecting shaft. A sliding pin is provided inside the sliding sleeve, and the sliding pin is slidably connected to the spiral groove. The surface of the sliding sleeve is connected to a ring through a connecting rod, and the ring is slidably connected to the inner wall of the circular filter.

[0012] Preferably, the sleeve is connected to an inner ring via a connecting rod, the surface of the inner ring is rotatably connected to an outer ring, the outer ring is connected to an outer push piece via a connecting rod, and the outer push piece is slidably connected to the surface of the circular filter.

[0013] Preferably, one side of the processing box is rotatably connected to a rotating cover, the inside of the rotating cover is rotatably connected to an inner cover, the inner cover is fixedly connected to the processing box through a fixing member, the rotating cover is connected to a movable box, and the inner ring and the outer ring are both arranged inside the movable box.

[0014] Preferably, the discharge device includes a collecting pipe, a sealing cover is threadedly connected to the collecting pipe, a connecting pipe is connected to the collecting pipe, a groove is provided inside the rotating cover, the connecting pipe is connected to the groove, and an open groove is provided on the processing box, and the open groove is connected to the collecting pipe through an empty box.

[0015] (3) Beneficial effects Compared with the prior art, the present invention provides a water filtration and purification water injection wellhead, which has the following beneficial effects: 1. The water quality filtration and purification injection wellhead can realize double-mesh filtration of the water source during the wellhead water injection stage through the purification and filtration components. In the whole filtration process, the rotation of the circular filter can be automatically controlled according to the blockage of the filter, and the clean filter can be automatically rotated to the bottom of the water source inlet. The internal water pressure of the whole filtration is gradually increased according to the blockage of the filter. The water pressure is used as the power source to control the automatic small rotation of the filter, thereby ensuring that the filter will not be in the same working surface for a long time, resulting in impurity blockage, thereby improving the stability of wellhead water injection.

[0016] 2. The water quality filtration and purification injection wellhead can automatically slide and scrape the surface and inner wall of the circular filter through the provided processing components and discharge device, effectively remove impurities attached to the inner and outer surfaces of the filter, reduce the blockage of the filter, and the scraped impurities can automatically enter the discharge device for separate collection, reducing manual intervention, and the entire process does not require equipment shutdown, thereby realizing uninterrupted connection operation of the injection well and improving the efficiency of water injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a water filtration and purification injection wellhead proposed by the present invention; Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of a water filtration and purification injection wellhead proposed by the present invention; Figure 3 This is a schematic structural diagram of a filtering device for filtering and purifying water at a water injection wellhead proposed by the present invention; Figure 4 This is a schematic structural diagram of a pressure conversion device for water filtration and purification at a water injection wellhead proposed by the present invention; Figure 5 This is a schematic diagram of the position structure of a circular filter screen for water filtration and purification at a water injection wellhead proposed by the present invention; Figure 6 This is a schematic diagram of the structure of a water filtration and purification device for water injection wellheads proposed by the present invention; Figure 7 This is a schematic diagram of the connection structure of the inner ring and outer ring of a water filtration and purification water injection wellhead proposed by the present invention; Figure 8 This is a schematic structural diagram of a discharge device for water filtration and purification at a water injection wellhead proposed by the present invention; Figure 9 This is a schematic diagram of the water flow structure of a water filtration and purification water injection wellhead proposed by the present invention, in which the partition is rotated to a vertical state; Figure 10 This is a schematic diagram of the water source flow structure in which the partition of a water filtration and purification injection wellhead proposed by the present invention is rotated to an inclined state.

[0018] In the figure: 1. water injection wellhead; 2. treatment box; 21. inlet; 22. outlet; 3. purification filter assembly; 301. circular filter screen; 302. partition; 303. connecting shaft; 304. worm gear; 305. worm; 306. ratchet; 307. connecting sleeve; 308. piston rod; 309. piston plate; 310. compression spring; 311. bracket; 312. ratchet plate; 313. telescopic spring; 314. compression rod; 315. groove; 316. movable box; 317. push plate; 318. outer ring; 319. inner ring; 320. spiral groove; 321. sliding sleeve; 322. sliding pin; 323. open groove; 324. connecting pipe; 325. collecting pipe; 326. sealing cover; 327. rotating cover; 328. inner cover; 329. collar. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1-10 A water quality filtration and purification injection wellhead comprises an injection wellhead 1; a treatment box 2; a purification filter assembly 3 for filtering the water injected from the injection wellhead 1 and separating impurities; the purification filter assembly 3 comprises a filtering device, a pressure conversion device, a processing device and a discharge device; the filtering device filters the water; the pressure conversion device automatically controls the rotation of the filtering device according to the blockage state of the filtering device to replace the blocked position; the processing device is used to process impurities on the filtering device; and the discharge device is used to automatically transfer the processed impurities.

[0021] In this embodiment, the filtering device includes a circular filter 301, and four partitions 302 are fixedly connected to the surface of the circular filter 301. The partitions 302 are rotatably connected to the interior of the treatment box 2. The upper and lower positions of the treatment box 2 are provided with an inlet 21 and an outlet 22. The water source is injected downward from the upper right of the water injection wellhead 1 and passes through the circular filter 301 to achieve double-layer filtration of the water source. The water source will enter from the upper position of the treatment box 2, enter from the inlet 21, and then enter the interior of the treatment box 2. The water source will then pass through the top position of the circular filter 301, enter the interior of the circular filter 301, and then pass from directly below the circular filter 301, enter the interior of the water injection wellhead 1 from the position of the outlet 22, and then be injected into the ground. Therefore, the water source will pass through a two-layer filter screen to achieve double filtration and purification. The entire circular filter 301 is set up by four partitions 302 to form four spaces. Even if the partition 302 is rotated to a vertical state and the inlet 21 enters the circular filter 301, it will be divided into two streams of water, flowing into the filters on the left and right sides, and then converging into the interior of the circular filter 301.

[0022] Furthermore, the pressure conversion device includes an automatic control device and a transposition device. The automatic control device includes a connecting sleeve 307, which is connected to the processing box 2 and is located above the circular filter 301. The interior of the connecting sleeve 307 is slidably connected to a piston plate 309, and one side of the piston plate 309 is fixedly connected to a piston rod 308. The surface of the piston rod 308 is sleeved with a compression spring 310, and the compression spring 310 is located inside the connecting sleeve 307. One end of the piston rod 308 passes through the connecting sleeve 307 and is connected to a bracket 311, and the bracket 311 is connected to the transposition device. When the uppermost layer of the circular filter 301 is gradually covered by impurities, that is, when the filter at the uppermost position is clogged, a separate space will be formed in the fan-shaped interval at the uppermost portion of the circular filter 301. As the circular filter 301 becomes clogged, the internal pressure of this separate space will gradually increase. As the pressure increases, the water pressure will enter the interior of the connecting sleeve 307, thereby squeezing the piston plate 309 on the piston rod 308, pushing the piston plate 309 to move laterally, and then squeezing the compression spring 310. After that, the movement of the piston rod 308 will drive the bracket 311 to move laterally synchronously.

[0023] Furthermore, the transposition device includes a worm 305, fixedly connected to a ratchet 306. A ratchet plate 312 is provided on the surface of the ratchet 306, which is mounted on a bracket 311 via a connector. A worm wheel 304 is meshed with the surface of the worm 305. A connecting shaft 303 is fixedly connected to the interior of the worm wheel 304. The connecting shaft 303 is fixedly connected to the circular filter 301 and rotatably connected to the treatment box 2. The unidirectional rotation of the ratchet teeth controls the meshing transmission between the worm wheel 304 and the worm 305, driving a slight rotation of the circular filter 301. The topmost clogged area is gradually rotated and transposed, with the other curved surface entering below the inlet 21, while the other curved surface remains clear. The filter's filtering function is restored, and the clogged portion of the circular filter 301 is transposed to the right. Furthermore, when impurities are located in the right area, when the water flows from top to bottom, it will also generate an oblique downward thrust to back-blow the circular filter 301, thereby achieving the effect of efficiently removing impurities.

[0024] In addition, the connecting member includes a compression rod 314, which is slidably connected to the bracket 311. A telescopic spring 313 is sleeved on the surface of the compression rod 314. The bottom of the compression rod 314 is connected to the ratchet plate 312, and the telescopic spring 313 is located between the bracket 311 and the ratchet plate 312. A box body is provided on the side of the processing box 2, and the pressure conversion device is located inside the box body. The two ends of the worm 305 are rotatably connected to the inside of the box body. Because of the ratchet structure, when the ratchet plate 312 is reset and slides, it is elastically squeezed out of position by the telescopic spring 313, thereby not causing the ratchet wheel 306 to rotate, and can only achieve a one-way driving effect. Therefore, the circular filter screen 301 will not reset itself and rotate with the reset action.

[0025] In addition, the processing device includes a sleeve 321, which is slidably connected to the surface of the connecting shaft 303. The surface of the connecting shaft 303 is provided with a spiral groove 320. A sliding pin 322 is disposed within the sleeve 321, which controls the reciprocating lateral movement of the sleeve 321 using a principle similar to a reciprocating screw. The sliding pin 322 is slidably connected to the spiral groove 320. The surface of the sleeve 321 is connected to a collar 329 via a connecting rod. The collar 329 is slidably connected to the inner wall of the circular filter 301. When the sleeve 321 slides laterally, the collar 329 is driven by the connecting rod to slide laterally along the inner wall of the circular filter 301, thereby cleaning impurities attached to the inner wall of the circular filter 301. Because the entire circular filter 301 is undergoing a double filtration process, impurities may be attached to both the inner and outer surfaces. Therefore, the collar 329 slides laterally within the circular filter 301 to effectively clean the attached impurities.

[0026] It is worth noting that the sleeve 329 is connected to the inner ring 319 via a connecting rod. The surface of the inner ring 319 is rotatably connected to the outer ring 318. The outer ring 318 is connected to the outer push piece 317 via a connecting rod. The outer push piece 317 is slidably connected to the surface of the circular filter 301. During the lateral movement of the sliding sleeve 321, the inner ring 319 is also driven to move lateral via the connecting rod. The inner ring 319 then synchronously drives the outer push piece 317 connected to the outer ring 318 to scrape the outer surface of the circular filter 301, thereby ensuring the filtering effect of the circular filter 301.

[0027] It is worth noting that a rotating cover 327 is rotatably connected to one side of the processing box 2, and an inner cover 328 is rotatably connected to the inner portion of the rotating cover 327. The inner cover 328 is fixedly connected to the processing box 2 via a fixing member. The rotating cover 327 is connected to the movable box 316, and the inner ring 319 and the outer ring 318 are both arranged inside the movable box 316. In order to avoid interference in the entire movement, the outer ring 318 and the inner ring 319 are provided. Considering that the entire circular filter 301 is in a rotating state, when the circular filter 301 rotates, it will indirectly drive the rotation of the outer push piece 317 through the partition 302. The outer push piece 317 is connected to the outer ring 318 through a connecting rod. Therefore, even if the outer push piece 317 rotates, it will drive the outer ring 318 to rotate on the inner ring 319. Therefore, there will be no interference in the overall movement, which can effectively maintain the stable operation of the circular filter 301.

[0028] It is worth mentioning that the discharge device includes a collecting pipe 325, a sealing cover 326 is threadedly connected to the collecting pipe 325, a connecting pipe 324 is connected to the collecting pipe 325, a groove 315 is provided inside the rotating cover 327, the connecting pipe 324 is connected to the groove 315, and an open groove 323 is provided on the processing box 2, and the open groove 323 is connected to the collecting pipe 325 through an empty box. The impurities scraped back and forth will enter the grooves 315 on both sides. Along the grooves 315, the impurities will flow obliquely through the connecting pipe 324 and enter the collection pipe 325 to achieve separation and storage. The impurities on the outer surface of the circular filter 301 will enter the right side of the processing box 2 as the circular filter 301 gradually rotates. When the partition 302 rotates to the bottom of the open groove 323, the impurities will flow from the position of the open groove 323 into the collection pipe 325 to achieve sinking, drainage and separation of impurities. The operator can remove the stored impurities simply by opening the sealing cover 326. Because there is a certain water source inside, when the sealing cover 326 is opened, the water source will be discharged outward along the flow channel at this time, and the equipment does not need to be shut down.

[0029] Working principle: first, when the water injection wellhead 1 is implementing the water injection operation, the water source is injected into the ground from top to bottom. The water source will enter from the upper position of the treatment box 2, enter from the inlet 21, and then enter the interior of the treatment box 2. After that, the water source will pass through the top position of the circular filter 301, enter the interior of the circular filter 301, and then pass through from directly below the circular filter 301, and enter the interior of the water injection wellhead 1 from the position of the outlet 22, and then be injected into the ground. Therefore, the water source will pass through a two-layer filter to achieve double filtration and purification. When the uppermost layer of the circular filter 301 is gradually covered by impurities, that is, when the filter at the uppermost position is clogged, the water source entering the circular filter 301 will be reduced, and a separate space will be formed in the uppermost fan-shaped interval of the circular filter 301. As the circular filter 301 is clogged, the internal pressure of this separate space will gradually increase. As the pressure increases, the water pressure will enter the interior of the connecting sleeve 307, thereby squeezing the piston piece 309 on the piston rod 308, pushing the piston piece 309 to move horizontally, and then squeezing the compression spring 310. The movement of the piston rod 308 will then drive the bracket 311 The bracket 311 is moved laterally synchronously through the two compression rods 314 and the ratchet plate 312. The one-way pushing process of the ratchet drives the ratchet 306 to rotate, and then drives the worm 305 to rotate. At this time, the worm 305 and the worm wheel 304 are in a meshing state, which will synchronously drive the connecting shaft 303 to rotate, and then drive the circular filter 301 to rotate. At this time, the top blocked area will gradually be rotated and displaced, and the other arc-shaped surface will enter the bottom of the inlet 21, and the other arc-shaped surface will be in a clean state, so the filtering function of the filter will be realized again, and the blocked part of the circular filter 301 will be displaced to the right. When the top position of the circular filter 301 is switched, the water source will flow in smoothly again and flow from top to bottom, and the internal water pressure will be relieved. At this time, the elastic force of the compression spring 310 will push the piston plate 309 and the piston rod 308 to slide and reset again, waiting for the next blocking movement. When the piston rod 308 is reset, it will synchronously drive the bracket 311 to reset and slide, and then drive the ratchet plate 312 to slide horizontally. Because of the ratchet structure, the ratchet plate 312 is elastically squeezed out of place by the telescopic spring 313 when it resets and slides, so that it will not cause the ratchet 306 to rotate, and can only perform a one-way driving effect. Therefore, the circular filter 301 will not reset and rotate itself with the reset action. In addition, a processing component is also set up in the whole process to scrape off impurities attached to the circular filter 301. When the connecting shaft 303 rotates, the spiral groove 320 set on the surface will drive the sleeve 321 to slide horizontally, and the principle similar to the "reciprocating screw" is used to control the sleeve 321 to move back and forth horizontally.The lateral sliding of the sleeve 321 drives the collar 329 to slide laterally along the inner wall of the circular filter 301 via the connecting rod, thereby cleaning impurities attached to the inner wall of the circular filter 301. Furthermore, during the lateral movement of the sleeve 321, the connecting rod also drives the inner ring 319 to move laterally. The inner ring 319 then simultaneously drives the outer push tabs 317 connected to the outer ring 318 to scrape the outer surface of the circular filter 301, thereby ensuring the filtering effect of the circular filter 301. Although the circular filter 301 is in a rotating state during the entire process, the rotation of the circular filter 301 also drives the rotation of the rotating cover 327, thereby controlling the synchronous rotation of the connecting rod on the rotating cover 327. Therefore, the entire process does not produce motion interference. The entire process uses lateral thrust to achieve the effect of reciprocating scraping of the inner and outer surfaces of the circular filter 301. Impurities scraped back and forth will enter the grooves 315 on both sides. Following the grooves 315, the impurities will flow obliquely through the connecting pipe 324 and into the collection pipe 325 for separation and storage. Impurities on the outer surface of the circular filter 301 will gradually rotate as the circular filter 301 moves into the right side of the processing box 2. When the partition 302 rotates to below the open groove 323, the impurities will flow from the open groove 323 into the collection pipe 325. This entire process is an automatic reciprocating motion, requiring no manual intervention from the operator or equipment downtime, thereby improving the injection efficiency and filtration and purification stability of the water injection wellhead 1.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A water filtration and purification water injection wellhead, characterized in that: include: Water injection wellhead (1); Processing box (2); A purification and filtering component (3) is used to filter and separate impurities from the water injected from the water injection wellhead (1); The purification and filtering assembly (3) includes a filtering device, a pressure conversion device, a processing device and a discharge device; The filtering device filters the water; The pressure conversion device automatically controls the rotation of the filter device according to the blockage state of the filter device to change the blockage position; The processing device is used to process impurities on the filtering device; The discharge device is used to automatically transfer the processed impurities; The filtering device comprises a circular filter (301), four partitions (302) are fixedly connected to the surface of the circular filter (301), and the partitions (302) are rotatably connected to the interior of the treatment box (2). The treatment box (2) is provided with an inlet (21) and an outlet (22) at upper and lower positions. Water is injected downward from the upper right of the water injection wellhead (1) and passes through the circular filter (301) to achieve double-layer filtration of the water.

2. A water filtration and purification water injection wellhead according to claim 1, characterized in that: The pressure conversion device includes an automatic control device and a transposition device. The automatic control device includes a connecting sleeve (307). The connecting sleeve (307) is communicated with the processing box (2) and is located above the circular filter (301). The interior of the connecting sleeve (307) is slidably connected to a piston plate (309). One side of the piston plate (309) is fixedly connected to a piston rod (308). The surface of the piston rod (308) is sleeved with a compression spring (310). The compression spring (310) is located inside the connecting sleeve (307). One end of the piston rod (308) passes through the connecting sleeve (307) and is connected to a bracket (311). The bracket (311) is connected to the transposition device.

3. A water filtration and purification water injection wellhead according to claim 2, characterized in that: The transposition device comprises a worm (305), a ratchet (306) fixedly connected to the worm (305), a ratchet plate (312) provided on the surface of the ratchet (306), the ratchet plate (312) being provided on a bracket (311) via a connecting piece, a worm wheel (304) meshing with the surface of the worm (305), a connecting shaft (303) fixedly connected inside the worm wheel (304), the connecting shaft (303) being fixedly connected to the circular filter (301), and the connecting shaft (303) being rotatably connected to the processing box (2).

4. A water filtration and purification water injection wellhead according to claim 3, characterized in that: The connecting member includes a compression rod (314), the compression rod (314) is slidably connected to the bracket (311), a telescopic spring (313) is sleeved on the surface of the compression rod (314), the bottom of the compression rod (314) is connected to the ratchet plate (312), and the telescopic spring (313) is located between the bracket (311) and the ratchet plate (312).

5. A water filtration and purification water injection wellhead according to claim 4, characterized in that: A box body is provided on the side of the processing box (2), the pressure conversion device is located inside the box body, and both ends of the worm (305) are rotatably connected inside the box body.

6. The water filtration and purification water injection wellhead according to claim 4, characterized in that: The processing device includes a sliding sleeve (321), the sliding sleeve (321) is slidably connected to the surface of the connecting shaft (303), the surface of the connecting shaft (303) is provided with a spiral groove (320), the interior of the sliding sleeve (321) is provided with a sliding pin (322), the sliding pin (322) is slidably connected to the spiral groove (320), the surface of the sliding sleeve (321) is connected to a collar (329) through a connecting rod, and the collar (329) is slidably connected to the inner wall of the circular filter (301).

7. A water filtration and purification water injection wellhead according to claim 6, characterized in that: The sleeve ring (329) is connected to an inner ring (319) via a connecting rod. The surface of the inner ring (319) is rotatably connected to an outer ring (318). The outer ring (318) is connected to an outer push piece (317) via a connecting rod. The outer push piece (317) is slidably connected to the surface of the circular filter (301).

8. The water filtration and purification water injection wellhead according to claim 7, characterized in that: A rotating cover (327) is rotatably connected to one side of the processing box (2), an inner cover (328) is rotatably connected to the interior of the rotating cover (327), the inner cover (328) is fixedly connected to the processing box (2) via a fixing member, the rotating cover (327) is connected to a movable box (316), and the inner ring (319) and the outer ring (318) are both arranged inside the movable box (316).

9. The water filtration and purification water injection wellhead according to claim 8, characterized in that: The discharge device includes a collecting pipe (325), a sealing cover (326) is threadedly connected to the collecting pipe (325), a connecting pipe (324) is connected to the collecting pipe (325), a groove (315) is provided inside the rotating cover (327), the connecting pipe (324) is connected to the groove (315), and an open groove (323) is provided on the processing box (2), and the open groove (323) is connected to the collecting pipe (325) through an empty box.

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