A geothermal wellhead sand removal device

Abstract

The application belongs to the technical field of geothermal wellhead sand removal and discloses a geothermal wellhead sand removal device, which comprises a sand removal cone barrel, the middle part of the bottom of the sand removal cone barrel is provided with a scraping assembly, the scraping assembly comprises a flow guide pipe, the inner side of the flow guide pipe is uniformly provided with a plurality of groups of flow guide spiral leaves, the inner side of the upper end of the flow guide pipe is rotationally provided with a fixing ring, the inner side of the fixing ring is uniformly provided with a plurality of groups of rotating blades, and the middle part of the rotating blade is fixedly provided with a rotating shaft, the cooperation of the scraping assembly and the conical filter screen and other structures is beneficial to driving the rotating structure to rotate through the rising geothermal steam, the rotating force drives the magnet scraper to rotate along the inner wall of the conical filter screen, the sand and gravel adhered to the surface of the conical filter screen can be scraped off in the rotating process, the sand and gravel can be conveniently collected, the sand and gravel adhered to the surface of the conical filter screen can be effectively avoided in the scraping mode, the sand removal effect is not affected, and the geothermal steam can be ensured to be supplied for power generation.

Description

Technical Field

[0001] This invention belongs to the field of geothermal wellhead sand removal technology, specifically a geothermal wellhead sand removal device. Background Technology

[0002] Geothermal wellheads are typically used to guide and discharge geothermal steam. This steam is then directed into a steam generator for electricity generation. Geothermal steam is abundant, widely distributed, and recyclable, making it a valuable clean energy source. However, sandstone-type geothermal reservoirs are usually composed of gravel layers. If the formation is loosely cemented or there is pressure imbalance during injection and production, gravel particles may be carried into the steam flow. This gravel and impurities carried by the geothermal steam into the steam generator can damage it, resulting in significant economic losses. To avoid this, the geothermal steam is usually directed into a desander to filter out the gravel and ensure the steam is sufficiently clean.

[0003] For example, the utility model with publication number CN220539608U discloses a corrosion-resistant sand removal device for geothermal energy development. Its features include: a device body with an upper plate and a lower plate at its upper and lower ends, a sand removal section in the middle of the device body, and a steam outlet and a steam inlet at the upper and lower ends of the sand removal section, respectively, located on both sides of the device body. The surface in contact with the high-temperature steam from the geothermal well is treated with anti-corrosion welding. It is suitable for corrosive wells containing CO2 and H2S. The sand removal section is divided into three sections with different hole spacing and diameters in each section, effectively removing sand and gravel.

[0004] In the existing technology, the sand removal device can be effectively prevented from being corroded by geothermal steam by using a sand removal device made of corrosion-resistant materials. The sand removal structure can remove sand and gravel. However, the sand and gravel have a certain degree of moisture on their surface and are easy to adhere to the surface of the filter screen, which can cause the filter screen to become blocked, reduce the sand removal efficiency of the filter screen, and affect normal power generation. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a geothermal wellhead sand removal device. To achieve the above objectives, the present invention provides the following technical solution: a geothermal wellhead sand removal device, comprising a sand removal cone, wherein a scraping component is provided in the middle of the bottom of the sand removal cone; The scraping assembly includes a guide tube, and several sets of guide spiral blades are evenly fixed on the inner side of the guide tube. A fixing ring is rotatably provided on the inner side of the upper end of the guide tube, and several sets of rotating blades are evenly fixed on the inner side of the fixing ring. A rotating shaft is fixedly installed in the middle of the rotating blades, and four sets of upper fixing brackets are welded and installed on the outer side of the upper end of the rotating shaft. A magnetic scraper is fixedly installed on the end of the upper fixing bracket away from the rotating shaft. The scraping assembly includes a conical filter screen, and the side of the magnetic scraper away from the rotating shaft is in close contact with the inner wall of the conical filter screen.

[0006] Preferably, a sealed bearing is fixedly installed on the outer side of the upper and lower ends of the fixed ring, and the sealed bearing is fixedly installed on the inner side of the upper end of the guide pipe. Four sets of lower fixed brackets are welded and installed on the outer side of the rotating shaft near the sealed bearing. The lower fixed brackets are fixedly connected to the lower end of the magnetic scraper. The bottom of two sets of lower fixed brackets is fixedly installed with a sludge scraper. A stabilizing ring is provided through the upper end of the magnetic scraper. The upper end of the rotating shaft and the middle part of the magnetic scraper are fixedly connected by a diagonal brace.

[0007] Preferably, a fixed cover is fixedly installed on the top of the conical filter screen, and several sets of connecting rods are installed on the top of the fixed cover. Several sets of aluminum rings are fixedly installed on the outer side of the conical filter screen, and the rotating shaft is connected to the fixed cover through a limiting bearing.

[0008] Preferably, the inner wall of the sand removal cone is uniformly provided with several sets of vibration components; The vibration assembly includes a positioning plate, and four sets of limiting guide rods are installed on the side of the positioning plate near the conical filter screen. A movable block is slidably arranged on the outer side of the limiting guide rod away from the positioning plate. The positioning plate and the movable block are elastically connected by a support spring.

[0009] Preferably, a magnetic block is installed on the side of the movable block away from the supporting spring, and four sets of fixing plates are fixed at both ends of the movable block. A rotating block is rotatably arranged on the inner side of the two sets of fixing plates, and a telescopic rod is fixedly installed on the outer side of the rotating block. A limit sleeve is slidably arranged on the outer side of the telescopic rod away from the rotating block.

[0010] Preferably, a rotating ring is installed at the end of the limiting sleeve away from the telescopic rod, and a striking hammer is connected to the side of the rotating ring away from the limiting sleeve via a round rod. Limiting plates are fixedly installed at both ends of the positioning plate near the striking hammer, and the rotating ring is rotatably positioned on the outside of the end of the limiting plate away from the positioning plate.

[0011] Preferably, an arc-shaped frame is fixedly installed at the bottom of the sand removal cone, and a guide ring is welded to the outer side of the upper end of the guide pipe. The sludge scraper is slidably disposed on the inner side of the arc-shaped frame. A sand discharge pipe is installed at the bottom of one side of the arc-shaped frame, and a collection box is installed at the end of the sand discharge pipe away from the arc-shaped frame. A guide ring is fixedly installed at the upper end of the guide pipe, and a connecting pipe is fixedly installed at the bottom of the guide pipe.

[0012] Preferably, a guide cone is fixedly installed on the top of the sand removal cone, several sets of connecting rods are fixedly connected to the bottom of the guide cone, and a transmission pipe is installed on the top of the guide cone.

[0013] Preferably, four sets of support columns are fixedly installed at the bottom of the collection box, and a servo motor is fixedly installed on the front of the collection box by bolts. A rotating shaft is fixedly installed at the output end of the servo motor, and a flip scraper is fixedly installed on one side of the rotating shaft. The flip scraper is flipped and arranged inside the collection box.

[0014] Preferably, four sets of positioning sleeves are fixedly installed on one side of the upper end of the collection box, and a sealing baffle is rotatably provided at the lower end of the positioning sleeve. Support plates are installed on the top of both ends of the sealing baffle, and an arc-shaped spring frame is elastically provided between the support plate and the collection box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a combination of scraping components and conical filter screens to facilitate the rotation of a rotating structure driven by rising geothermal steam. The rotational force then propels magnetic scrapers along the inner wall of the conical filter screen. During this rotation, sand and gravel adhering to the surface of the screen are scraped away, making collection easier. Fixed guide spiral blades direct the rising steam, altering its ascent. The rising geothermal steam then drives the rotating blades at high speed, which in turn drives the central rotating shaft to rotate stably. This rotation causes four sets of magnetic scrapers to remove sand and gravel from the surface of the conical filter screen. This scraping method effectively prevents sand and gravel from adhering to the screen surface and affecting the sand removal effect, ensuring a reliable supply of geothermal steam for power generation.

[0016] This invention utilizes a combination of vibration and scraping components to facilitate the outward movement of a magnetic block via a rotating magnetic scraper. This outward movement causes a striking hammer to rotate along a limiting plate and rapidly strike an aluminum ring. The vibration also dislodges smaller, previously unscraped sand particles, further improving sand removal efficiency. The limiting plate provides the rotating ring with the ability to rotate and adjust. When the magnetic scraper moves near the magnetic block, because the scraper and block share the same magnetic poles, the scraper pushes the block outward along the limiting guide rod. During this outward movement, the extension rod and limiting sleeve work together to cause the striking hammer to rotate along the limiting plate. After rotation, it rapidly strikes the aluminum ring. The vibration of the aluminum ring causes the conical filter screen to vibrate at the same frequency, directly dislodging and collecting smaller sand particles from the holes, effectively improving sand removal efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the sand removal cone of the present invention; Figure 3 This is a schematic diagram of the scraping component structure of the present invention; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the vibration component structure of the present invention; Figure 7 This is a schematic cross-sectional view of the collection box structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C.

[0018] In the diagram: 100, sand removal cone; 101, guide ring; 102, arc-shaped frame; 103, sand discharge pipe; 104, guide pipe; 105, connecting pipe; 106, guide cone; 107, transmission pipe; 001. Scraping assembly; 200. Conical filter screen; 201. Connecting rod; 202. Fixing cover; 203. Aluminum ring; 300. Magnetic scraper; 301. Sealed bearing; 302. Fixing ring; 303. Rotating blade; 304. Rotating shaft; 305. Limiting bearing; 306. Lower fixed bracket; 307. Diagonal brace; 308. Upper fixed bracket; 309. Stabilizing ring; 310. Guide spiral blade; 311. Dredging scraper; 002. Vibration assembly; 400. Magnetic block; 401. Limiting guide rod; 402. Support spring; 403. Movable block; 404. Fixed plate; 405. Rotating block; 406. Telescopic rod; 407. Limiting sleeve; 408. Rotating ring; 409. Striking hammer; 410. Limiting plate; 411. Positioning plate; 500, Sealing baffle; 501, Collection box; 502, Servo motor; 503, Rotating shaft; 504, Tilting scraper; 505, Positioning sleeve; 506, Support plate; 507, Arc-shaped spring frame; 508, Support column. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 8 As shown, the present invention provides a geothermal wellhead sand removal device, including a sand removal cone 100, and a scraping component 001 is provided in the middle of the bottom of the sand removal cone 100; The scraping assembly 001 includes a guide tube 104, and several sets of guide spiral blades 310 are uniformly fixed on the inner side of the guide tube 104. A fixing ring 302 is rotatably arranged on the inner side of the upper end of the guide tube 104, and several sets of rotating blades 303 are uniformly fixed on the inner side of the fixing ring 302. A rotating shaft 304 is fixedly installed in the middle of the rotating blades 303, and four sets of upper fixing brackets 308 are welded and installed on the outer side of the upper end of the rotating shaft 304. A magnetic scraper 300 is fixedly installed on the end of the upper fixing bracket 308 away from the rotating shaft 304. The scraping assembly 001 includes a conical filter screen 200, and the side of the magnetic scraper 300 away from the rotating shaft 304 is in close contact with the inner wall of the conical filter screen 200.

[0021] The above scheme is adopted: the guide pipe 104 is used to guide the internal rising geothermal steam. During the rising process, the guide spiral blade 310 can achieve the effect of rotation and rising. The rising geothermal steam will drive the rotating blade 303 to rotate rapidly. The rotating shaft 304 can achieve the effect of kinetic energy transfer. With the upper fixed bracket 308, the lower fixed bracket 306 and the diagonal brace 307, the magnetic scraper 300 and the rotating shaft 304 can be stably connected. The rotation of the magnetic scraper 300 can scrape off the sand and gravel on the surface of the conical filter screen 200 for collection. The conical filter screen 200 can filter the geothermal steam and remove the sand and gravel contained therein. The guide spiral blade 310 and the rotating blade 303 have impact resistance, which can prevent the sand and gravel in the rising airflow from damaging the structure.

[0022] like Figures 2-5 As shown, a sealed bearing 301 is fixedly installed on the outer side of the upper and lower ends of the fixed ring 302, and the sealed bearing 301 is fixedly installed on the inner side of the upper end of the guide pipe 104. Four sets of lower fixed brackets 306 are welded and installed on the outer side of the rotating shaft 304 near the sealed bearing 301, and the lower fixed brackets 306 are fixedly connected to the lower end of the magnetic scraper 300. The bottom of two sets of lower fixed brackets 306 is fixedly installed with a sludge scraper 311. A stabilizing ring 309 is provided through the upper end of the magnetic scraper 300. The upper end of the rotating shaft 304 and the middle part of the magnetic scraper 300 are fixedly connected by a diagonal brace 307.

[0023] A fixed cover 202 is fixedly installed on the top of the conical filter screen 200, and several sets of connecting rods 201 are installed on the top of the fixed cover 202. Several sets of aluminum rings 203 are fixedly installed on the outer side of the conical filter screen 200. The rotating shaft 304 is connected to the fixed cover 202 through the limit bearing 305.

[0024] Using the above scheme: the sealed bearing 301 can stably install the fixing ring 302 on the inner side of the upper end of the guide pipe 104, ensuring that the fixing ring 302 and the inner structure can rotate stably. The stabilizing ring 309 can effectively restrict the four sets of magnetic scrapers 300. The fixing cover 202 can seal the conical filter 200 to prevent sand from entering the discharge transmission pipe 107. The bottom of the conical filter 200 and the sand removal cone 100 are in a closed state. The fixing cover 202 and the guide cone 106 can be connected by the connecting rod 201 to ensure the connection of the conical filter 200, thereby ensuring the stability of the structure.

[0025] like Figure 6 As shown, several sets of vibration components 002 are evenly arranged on the inner wall of the sand removal cone 100; The vibration assembly 002 includes a positioning plate 411, and four sets of limiting guide rods 401 are installed on the side of the positioning plate 411 near the conical filter screen 200. A movable block 403 is slidably arranged on the outer side of the end of the limiting guide rod 401 away from the positioning plate 411. The positioning plate 411 and the movable block 403 are elastically connected by a support spring 402.

[0026] A magnetic block 400 is installed on the side of the movable block 403 away from the supporting spring 402, and four sets of fixing plates 404 are fixed at both ends of the movable block 403. A rotating block 405 is rotatably arranged on the inner side of the two sets of fixing plates 404. A telescopic rod 406 is fixedly installed on the outer side of the rotating block 405, and a limit sleeve 407 is slidably arranged on the outer side of the telescopic rod 406 away from the rotating block 405.

[0027] A rotating ring 408 is installed at the end of the limiting sleeve 407 away from the telescopic rod 406. A hammer 409 is connected to the side of the rotating ring 408 away from the limiting sleeve 407 via a round rod. A limiting plate 410 is fixedly installed on both ends of the positioning plate 411 near the hammer 409. The rotating ring 408 is rotatably positioned on the outer side of the end of the limiting plate 410 away from the positioning plate 411.

[0028] Using the above scheme: the positioning plate 411 can provide an installation position for the vibration component 002; the limiting guide rod 401 can restrict the movable block 403 to ensure that the movable block 403 can slide and adjust stably; the side fixing plate 404 can restrict the rotating block 405 and assist in flipping adjustment; the telescopic rod 406 can extend and retract along the inner side of the limiting sleeve 407 to adapt to adjustment; the rotating ring 408 can flip along the outer side of the limiting plate 410 to assist the hammer 409 in adjusting and striking the aluminum ring 203 to vibrate; and the support spring 402 can push the magnetic block 400 to reset after the magnetic scraper 300 is separated, ensuring that the vibration component 002 can continuously strike and shake off gravel.

[0029] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, an arc-shaped frame 102 is fixedly installed at the bottom of the sand removal cone 100, and a guide ring 101 is welded to the outer side of the upper end of the arc-shaped frame 102 and the guide pipe 104. The sludge scraper 311 is slidably disposed on the inner side of the arc-shaped frame 102. A sand discharge pipe 103 is installed at the bottom of one side of the arc-shaped frame 102, and a collection box 501 is installed at the end of the sand discharge pipe 103 away from the arc-shaped frame 102. A guide ring 101 is fixedly installed at the upper end of the guide pipe 104, and a connecting pipe 105 is fixedly installed at the bottom of the guide pipe 104.

[0030] A guide cone 106 is fixedly installed on the top of the sand removal cone 100, and several sets of connecting rods 201 are fixedly connected to the bottom of the guide cone 106. A transmission pipe 107 is installed on the top of the guide cone 106.

[0031] Four sets of support columns 508 are fixedly installed at the bottom of the collection box 501, and a servo motor 502 is fixedly installed on the front of the collection box 501 by bolts. A rotating shaft 503 is fixedly installed at the output end of the servo motor 502. A flip scraper 504 is fixedly installed on one side of the rotating shaft 503. The flip scraper 504 is flipped and set inside the collection box 501.

[0032] Four sets of positioning sleeves 505 are fixedly installed on one side of the upper end of the collection box 501, and a sealing baffle 500 is rotatably provided at the lower end of the positioning sleeve 505. Support plates 506 are installed on the top of both ends of the sealing baffle 500, and an arc-shaped spring frame 507 is elastically provided between the support plate 506 and the collection box 501.

[0033] The above scheme is as follows: the arc-shaped frame 102 can collect falling sand and gravel, which can be discharged by the sludge scraper 311 by the flip scraper 504. The guide ring 101 can concentrate the rising airflow and provide auxiliary guidance. The connecting pipe 105 can connect the whole device to the geothermal wellhead to ensure that the geothermal steam can rise normally for sand removal. The guide cone 106 can export and transmit the steam through the transmission pipe 107. The collection box 501 can collect sand and gravel. The servo motor 502 can drive the rotating shaft 503 and the flip scraper 504 to rotate, thereby pushing and guiding the sand and gravel out. The positioning sleeve 505 on the side can provide the ability to flip and adjust the sealing baffle 500. The support plate 506 and the arc-shaped spring frame 507 can cooperate to push the sealing baffle 500 to fit tightly against the side of the collection box 501, thereby achieving a sealing effect.

[0034] The working principle and usage process of this invention are as follows: First, high-temperature geothermal steam will enter the interior of the guide pipe 104 through the connecting pipe 105. After entering, it will generate rotational force under the guidance of the guide spiral blade 310. The rotational force will quickly push the rotating blade 303 to rotate along the sealed bearing 301. During the rotation, the rotating shaft 304 will drive the magnetic scraper 300 to rotate through the upper fixed bracket 308 and the lower fixed bracket 306 to scrape away the sand and gravel on the inner wall of the conical filter screen 200. During the rotation, the magnetic scraper 300 will push the magnetic block 400 and the movable block 403 to extend along the limiting guide rod 401 and compress the support spring 402 through magnetic force. When the movable block 403 extends, it will drive the rotating block 405 to move through the fixed plate 404. With the help of the limiting plate 410, the telescopic rod 406 and the limiting sleeve 407 can be rotated. During the rotation, the hammer 409 will strike the aluminum ring 203 and shake off the sand and gravel on the surface of the conical filter screen 200. When gravel falls onto the inner side of the arc-shaped frame 102, the flipping scraper 504, under the action of the lower fixed bracket 306, will rotate along the inner side of the arc-shaped frame 102 and push the gravel on the inner side to the inner side of the sand discharge pipe 103 and into the collection box 501. After a certain period of accumulation, the servo motor 502 will drive the rotating shaft 503 and the flipping scraper 504 to push the gravel to the sealing baffle 500. Under the weight of the gravel, the sealing baffle 500 will compress the arc-shaped spring frame 507 and flip along the positioning sleeve 505. After opening, the gravel will be discharged directly.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A desanding device for geothermal wellheads, comprising a desanding cone (100), characterized in that: A scraping assembly (001) is provided at the middle of the bottom of the sand removal cone (100). The scraping assembly (001) includes a guide tube (104), and several sets of guide spiral blades (310) are uniformly fixed on the inner side of the guide tube (104). A fixing ring (302) is rotatably provided on the inner side of the upper end of the guide tube (104), and several sets of rotating blades (303) are uniformly fixed on the inner side of the fixing ring (302). A rotating shaft (304) is fixedly installed in the middle of the rotating blades (303), and four sets of upper fixing brackets (308) are welded and installed on the outer side of the upper end of the rotating shaft (304). A magnetic scraper (300) is fixedly installed at the end of the upper fixing bracket (308) away from the rotating shaft (304). The scraping assembly (001) includes a conical filter screen (200), and the side of the magnetic scraper (300) away from the rotating shaft (304) is closely attached to the inner wall of the conical filter screen (200).

2. The geothermal wellhead sand removal device according to claim 1, characterized in that: Sealed bearings (301) are fixedly installed on the outer sides of the upper and lower ends of the fixed ring (302), and the sealed bearings (301) are fixedly installed on the inner side of the upper end of the guide pipe (104). Four sets of lower fixed brackets (306) are welded and installed on the outer side of the rotating shaft (304) near the sealed bearings (301), and the lower fixed brackets (306) are fixedly connected to the lower end of the magnetic scraper (300). The bottom of two sets of lower fixed brackets (306) are fixedly installed with sludge scrapers (311). A stabilizing ring (309) is provided through the upper end of the magnetic scraper (300). The upper end of the rotating shaft (304) and the middle part of the magnetic scraper (300) are fixedly connected by a diagonal brace (307).

3. The geothermal wellhead sand removal device according to claim 1, characterized in that: The top of the conical filter (200) is fixedly installed with a fixing cover (202), and the top of the fixing cover (202) is equipped with several sets of connecting rods (201). Several sets of aluminum rings (203) are fixedly arranged on the outside of the conical filter (200). The rotating shaft (304) is connected to the fixing cover (202) through a limiting bearing (305).

4. A geothermal wellhead sand removal device according to claim 1, characterized in that: The inner wall of the sand removal cone (100) is uniformly provided with several sets of vibration components (002). The vibration assembly (002) includes a positioning plate (411), and four sets of limiting guide rods (401) are installed on the side of the positioning plate (411) near the conical filter (200). A movable block (403) is slidably arranged on the outer side of the end of the limiting guide rod (401) away from the positioning plate (411). The positioning plate (411) and the movable block (403) are elastically connected by a support spring (402).

5. A geothermal wellhead sand removal device according to claim 4, characterized in that: A magnetic block (400) is installed on the side of the movable block (403) away from the supporting spring (402), and four sets of fixing plates (404) are fixed at both ends of the movable block (403). A rotating block (405) is rotatably arranged on the inner side of the two sets of fixing plates (404), and a telescopic rod (406) is fixedly installed on the outer side of the rotating block (405). A limit sleeve (407) is slidably arranged on the outer side of the telescopic rod (406) away from the rotating block (405).

6. A geothermal wellhead sand removal device according to claim 5, characterized in that: A rotating ring (408) is installed at the end of the limiting sleeve (407) away from the telescopic rod (406). A hammer (409) is connected to the side of the rotating ring (408) away from the limiting sleeve (407) via a round rod. A limiting plate (410) is fixedly installed on the side of the positioning plate (411) near the hammer (409) at both ends. The rotating ring (408) is rotatably positioned on the outside of the end of the limiting plate (410) away from the positioning plate (411).

7. A geothermal wellhead sand removal device according to claim 2, characterized in that: An arc-shaped frame (102) is fixedly installed at the bottom of the sand removal cone (100), and a guide ring (101) is welded to the outer side of the upper end of the arc-shaped frame (102) and the guide pipe (104). The sludge scraper (311) is slidably disposed on the inner side of the arc-shaped frame (102). A sand discharge pipe (103) is installed at the bottom of one side of the arc-shaped frame (102), and a collection box (501) is installed at the end of the sand discharge pipe (103) away from the arc-shaped frame (102). A guide ring (101) is fixedly installed at the upper end of the guide pipe (104), and a connecting pipe (105) is fixedly installed at the bottom of the guide pipe (104).

8. A geothermal wellhead sand removal device according to claim 3, characterized in that: A guide cone (106) is fixedly installed on the top of the sand removal cone (100), and several sets of connecting rods (201) are fixedly connected to the bottom of the guide cone (106). A transmission pipe (107) is installed on the top of the guide cone (106).

9. A geothermal wellhead sand removal device according to claim 7, characterized in that: Four sets of support columns (508) are fixedly installed at the bottom of the collection box (501), and a servo motor (502) is fixedly installed on the front of the collection box (501) by bolts. A rotating shaft (503) is fixedly installed at the output end of the servo motor (502). A flip scraper (504) is fixedly installed on one side of the rotating shaft (503), and the flip scraper (504) is flipped and arranged inside the collection box (501).

10. A geothermal wellhead sand removal device according to claim 9, characterized in that: Four sets of positioning sleeves (505) are fixedly installed on one side of the upper end of the collection box (501), and a sealing baffle (500) is rotatably provided at the lower end of the positioning sleeve (505). Support plates (506) are installed on the top of both ends of the sealing baffle (500), and an arc-shaped spring frame (507) is elastically provided between the support plate (506) and the collection box (501).

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