A self-cleaning geothermal well screen pipe for geothermal development

Abstract

The present invention discloses a self-cleaning geothermal well screen pipe for geothermal exploitation, belonging to the technical field of geothermal well exploitation equipment, comprising a screen pipe main body, the top outer wall of the screen pipe main body is fixedly connected with a fixing plate by bolts, the fixing plate is connected with a turntable by a bearing, the lifting screw rod is threadedly sleeved with a swivel, the lower part of the lifting screw rod is sleeved with a hammer assembly, the turntable can drive the lifting screw rod to rotate along the inner wall of the screen pipe main body, the turntable and the inner ring cylinder can drive the lifting screw rod to move up and down through the swivel, and the swivel can drive the rotating cylinder to rotate through a telescopic member. The present invention has the technical effect of not only rotating and scraping away dirt at different heights, but also driving the hammer assembly to rotate and move up and down with the scraping plate, so that firm dirt is easy to loosen, and easily entangled blocking dirt is rotary cut and crushed, thereby improving the scraping effect and enhancing the cleaning efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of geothermal well mining equipment, and in particular relates to a self-cleaning geothermal well screen pipe used in geothermal mining. Background Art

[0002] Geothermal mining refers to the development of renewable thermal energy stored in the earth's interior for the purpose of utilization. Geothermal wells refer to devices that use geothermal energy at a depth of about 3,500 meters or hot spring water with a water temperature greater than 30°C to generate electricity. During the operation of geothermal wells, in order to ensure that the geothermal wells do not form lumps in their delivery pipelines during transportation, affecting the delivery efficiency, it is necessary to install screen pipes when arranging the geothermal wells to ensure the delivery efficiency. When the screen pipes are used for a long time, dirt will accumulate on the inner wall of the screen pipes, and the inner wall of the screen pipes needs to be cleaned regularly.

[0003] To this end, a Chinese patent with patent number CN217380502U discloses a special descaling device for geothermal well screen pipes, wherein a scraping mechanism is arranged on the surface of the screen pipe body, and the scraping mechanism comprises a support frame, a first motor is fixedly connected to the surface of the support frame, a connecting rod is fixedly connected to the output end of the first motor, a first gear is fixedly connected to the surface of the connecting rod, a second gear is meshedly connected to the surface of the first gear, a connecting cylinder is fixedly connected to the surface of the second gear, a connecting rod is slidably connected to the surface of the connecting cylinder, a first baffle is fixedly connected to the surface of the connecting rod, a rotating rod is rotatably connected to the surface of the first baffle via a rotating shaft, and a scraper is fixedly connected to the surface of the rotating rod. By setting up the scraping mechanism, the entire device can scrape and descale the inside of the pipe wall at different depths.

[0004] However, the above device cannot fully scrape off the relatively firm dirt attached to the screen tube wall with only a single scraper, and cannot loosen and break the firm dirt to a certain extent, resulting in a poor cleaning effect, which in turn affects the cleaning work efficiency. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a self-cleaning geothermal well screen pipe for geothermal development. The self-cleaning geothermal well screen pipe has the function of rotating and scraping away dirt at different heights, and can also drive the hammer assembly to rotate and move up and down along with the scraping plate, so that firm dirt can be easily loosened and easily entangled blocking dirt can be rotary cut and broken, thereby improving the scraping effect and enhancing the cleaning efficiency. The problem in the prior art that the relatively firm dirt attached to the screen pipe wall cannot be fully scraped away by a single scraper, and the firm dirt cannot be loosened and broken to a certain extent, resulting in poor cleaning effect, is solved.

[0006] The present invention is achieved in this way: a self-cleaning geothermal well screen pipe for geothermal development includes a screen pipe body, the top outer wall of the screen pipe body is fixedly connected to a fixing plate by bolts, the fixing plate is connected to a rotating disk by a bearing, the rotating disk is equipped with a scraping assembly, the scraping assembly includes a lifting screw rod and a scraping plate, the fixing plate is fixedly connected to a top cover, the inner top of the top cover is fixedly connected to an inner ring cylinder, the lifting screw rod is located between the screen pipe body and the inner ring cylinder, a swivel is threadedly sleeved on the lifting screw rod, the lower part of the lifting screw rod is sleeved with a hammer assembly, the hammer assembly includes a rotating cylinder and a hammer block, the rotating disk can drive the lifting screw rod to rotate along the inner wall of the screen pipe body, the rotating disk and the inner ring cylinder can drive the lifting screw rod to move up and down through the swivel, and the swivel can drive the rotating cylinder to rotate through the telescopic member.

[0007] With this arrangement, through the cooperation of the turntable, the inner ring cylinder, the swivel and the scraping assembly, the lifting screw can not only drive the scraping plate to perform a rotational scraping motion along the inner wall of the screen tube body, but also drive the scraping plate to move up and down, so as to realize the cleaning and scraping of dirt at different heights. At the same time, through the cooperation of the swivel, the telescopic part and the hammering assembly, the rotary drum drives the hammering block and the rotary cutting blade to rotate, and can move up and down with the scraping assembly, which is not only convenient for rotary hammering of firm dirt, so that the hammering loosens it and improves the scraping effect, but also convenient for rotary cutting and crushing of easily entangled blocking dirt, which is beneficial to enhance the cleaning force, thereby effectively improving the working efficiency of dirt cleaning.

[0008] Specifically, the turntable is sleeved on the periphery of the screen tube body, and evenly distributed support plates are fixedly connected to the top inner wall of the turntable. The support plates are provided with four and the lifting screw rods are slidably inserted on the corresponding support plates. Evenly distributed teeth are fixedly connected to the bottom outer wall of the turntable, and a gear is connected to the fixed plate through a bearing. A fixed seat is fixedly connected to the side wall of the fixed plate, and a motor is fixedly installed on the fixed seat. The output end of the motor is fixedly connected to the middle part of the gear, and the gear is meshingly connected to the teeth.

[0009] With this arrangement, a stable connection between the lifting screw and the turntable is facilitated through the support plate, and the turntable is conveniently driven to rotate through the meshing transmission principle of teeth and gears, thereby facilitating the lifting screw and the scraping assembly to perform rotational scraping along the inner wall of the screen tube body.

[0010] Specifically, a guide hole is provided on the support plate, the lifting screw rod is inserted into the guide hole, a guide rail is fixedly connected to the hole wall of the guide hole, guide grooves are provided on both sides of the lifting screw rod, the guide grooves slide along the guide rails, the top of the swivel is connected to the bottom of the support plate through a bearing, and the lifting screw rod thread passes through the middle of the swivel.

[0011] Through this arrangement, when the swivel rotates, due to the threaded connection between the lifting screw and the swivel, and the guiding effect of the guide hole, guide rail and guide groove on the lifting screw, it is convenient to drive the lifting screw to move up and down along the inner wall of the screen tube body, that is, drive the scraping assembly to move up and down to perform a scraping operation, so as to facilitate the cleaning operation of the screen tube body at different depths.

[0012] Specifically, a toothed disc is fixedly connected to the bottom of the inner ring cylinder, a toothed ring is sleeved and fixed on the outer wall of the bottom of the rotating ring, and the toothed ring is meshingly connected with the toothed disc.

[0013] With this arrangement, through the meshing transmission principle of the toothed disc and the toothed ring, when the turntable drives the lifting screw and the swivel to rotate synchronously along the inner wall of the screen tube, the toothed ring of the swivel can be driven to rotate along the toothed disc of the inner ring cylinder, thereby realizing the self-rotational movement of the swivel, and then facilitating the swivel to drive the rotating cylinder to rotate through the telescopic part, that is, realizing the rotational movement of the hammering assembly, thereby realizing the hammering and crushing and cutting operations of firm dirt, and effectively enhancing the self-cleaning strength and working efficiency of the screen tube.

[0014] Specifically, the telescopic member includes an ear plate, a first telescopic plate and a second telescopic plate. The bottom of the swivel and the top of the rotating drum are fixedly connected with the ear plates, the ends of the ear plates are hinged with the first telescopic plate, the ends of the first telescopic plate are hinged with the second telescopic plate, and the second telescopic plates are provided in plurality and are hingedly connected at the head and tail.

[0015] Through this arrangement, the stability of the connection structure between the swivel and the drum is effectively improved through the telescopic part, so that the rotating swivel can drive the drum to rotate synchronously. At the same time, the drum can drive the hammering assembly to move up and down along with the lifting screw rod. It is flexible to use and is conducive to improving the use efficiency of the hammering assembly, thereby enhancing the cleaning efficiency of dirt removal.

[0016] Specifically, a receiving groove is opened in the middle of the ear plate, a support rod is fixedly connected to the receiving groove, the first telescopic plate is slidably sleeved on the support rod, a shaft rod is slidably inserted between the ends of the first telescopic plate and the second telescopic plate and between the ends of the second telescopic plate, and threaded covers are threadedly sleeved on both ends of the shaft rod.

[0017] Through this arrangement, the telescopic part can be easily retracted and moved up and down. Through the folding, contraction and extension between the first telescopic plate and the second telescopic plate, the rotating drum can be easily moved up and down following the lifting screw rod, which is easy to use. As a result, the hammering assembly can not only perform rotating hammering and crushing work, but also move up and down, effectively enhancing the dirt cleaning effect.

[0018] Specifically, the rotary drum is slidably sleeved on the lifting screw rod, and the scraping plate is fixedly connected to the bottom of the lifting screw rod by bolts.

[0019] This arrangement facilitates the rotation of the drum and the installation and removal of the scraper plate. The scraper plate is convenient for limiting the position of the drum and is easy to use and has high stability.

[0020] Specifically, the hammer block is fixedly connected to the middle part of the outer wall of the rotating drum by bolts, the outer walls of the upper and lower ends of the rotating drum are both threadedly sleeved with threaded rings, and the outer walls of the threaded rings are fixedly connected with evenly distributed rotary cutting blades.

[0021] This arrangement effectively improves the stability of the connection structure between the hammer block, the rotary cutting blade and the rotating drum, while facilitating the installation and disassembly of the hammer block and the rotary cutting blade, thereby facilitating their replacement, making them flexible to use and having a wide range of applications.

[0022] Specifically, a clearance groove is provided on the bottom side wall of the top cover, and the edge of the gear extends into the clearance groove.

[0023] This arrangement facilitates meshing transmission between the gear and the turntable, thereby facilitating the turntable to rotate.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation of the rotating disk, the inner ring cylinder, the rotating ring and the scraping assembly, the lifting screw rod can not only drive the scraping plate to perform a rotating scraping motion along the inner wall of the screen tube body, but also drive the scraping plate to move up and down, so as to realize cleaning and scraping of dirt at different heights;

[0025] At the same time, through the cooperation of the swivel, telescopic parts and hammering assembly, the rotating drum drives the hammering block and the rotary cutting blade to rotate, and can move up and down with the scraping and sweeping assembly. It is not only convenient to rotate and hammer the firm dirt to loosen it and improve the scraping effect, but also convenient to rotary cut and crush the easily entangled and blocked dirt, which is beneficial to enhance the cleaning force, thereby effectively improving the work efficiency of dirt cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure provided by an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of a cross-sectional structure provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the top cover structure provided by an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of a turntable provided in an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of the support plate structure provided by an embodiment of the present invention;

[0032] Figure 7 The embodiment of the present invention provides Figure 3 The enlarged structural diagram at A in the middle;

[0033] Figure 8 It is a schematic diagram of the structure of the lifting screw rod provided by an embodiment of the present invention;

[0034] Fig. 9 It is a schematic diagram of the structure of a rotating drum provided in an embodiment of the present invention.

[0035] In the figure: 1. screen tube body; 101. fixed plate; 102. fixed seat; 2. turntable; 201. gear; 202. motor; 203. support plate; 204. guide hole; 205. guide slide rail; 206. tooth; 3. top cover; 301. inner ring cylinder; 302. toothed disc; 303. give way groove; 4. lifting screw rod; 401. guide slide groove; 402. scraper plate; 5. swivel; 501. gear ring; 502. ear plate; 503. support rod; 504. first telescopic plate; 505. shaft rod; 506. second telescopic plate; 507. accommodating groove; 508. threaded cover; 6. rotating cylinder; 601. hammer block; 602. rotary cutting blade; 603. threaded ring. DETAILED DESCRIPTION

[0036] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0037] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0038] refer to Figures 1 to 9 As shown, a self-cleaning geothermal well screen for geothermal development provided by an embodiment of the present invention comprises a screen body 1, a fixing plate 101 is fixedly connected to the top outer wall of the screen body 1 by bolts, a turntable 2 is connected to the fixing plate 101 by a bearing, a scraping assembly is installed on the turntable 2, the scraping assembly comprises a lifting screw rod 4 and a scraping plate 402, a top cover 3 is fixedly connected to the fixing plate 101, an inner ring cylinder 301 is fixedly connected to the inner top of the top cover 3, the lifting screw rod 4 is located between the screen body 1 and the inner ring cylinder 301, a swivel 5 is threadedly sleeved on the lifting screw rod 4, a hammering assembly is sleeved on the lower part of the lifting screw rod 4, and the hammering assembly comprises a rotating cylinder 6 and a hammering block 601, the turntable 2 can drive the lifting screw rod 4 to rotate along the inner wall of the screen body 1, the turntable 2 and the inner ring cylinder 301 can drive the lifting screw rod 4 to move up and down through the swivel 5, and the swivel 5 can drive the rotating cylinder 6 to rotate through the telescopic member.

[0039] By adopting the above scheme, through the cooperation of the turntable 2, the inner ring cylinder 301, the rotating ring 5 and the scraping assembly, the lifting screw 4 can not only drive the scraping plate 402 to rotate and scrape along the inner wall of the screen tube body 1, but also drive the scraping plate 402 to move up and down, so as to realize the cleaning and scraping of dirt at different heights. At the same time, through the cooperation of the rotating ring 5, the telescopic part and the hammering assembly, the rotating cylinder 6 drives the hammering block 601 and the rotary cutting blade 602 to rotate, and can move up and down with the scraping assembly, which is not only convenient for rotary hammering of firm dirt, so that the hammering loosens it and improves the scraping effect, but also convenient for rotary cutting and crushing of easily entangled blocking dirt, which is conducive to enhancing the cleaning force, thereby effectively improving the working efficiency of dirt cleaning.

[0040] Specifically, the turntable 2 is sleeved on the periphery of the screen tube body 1, and the top inner wall of the turntable 2 is fixedly connected with evenly distributed support plates 203, and the support plates 203 are provided with four and the lifting screw rods 4 are slidably inserted into the corresponding support plates 203, and the bottom outer wall of the turntable 2 is fixedly connected with evenly distributed teeth 206, and the fixed plate 101 is connected with a gear 201 through a bearing, and the side wall of the fixed plate 101 is fixedly connected with a fixed seat 102, and the fixed seat 102 is fixedly installed with a motor 202, and the output end of the motor 202 is fixedly connected to the middle part of the gear 201, and the gear 201 is meshingly connected with the teeth 206.

[0041] By adopting the above scheme, the support plate 203 facilitates the stable connection between the lifting screw rod 4 and the turntable 2, and the meshing transmission principle of the teeth 206 and the gear 201 facilitates the turntable 2 to rotate, thereby facilitating the lifting screw rod 4 and the scraping assembly to perform rotational scraping along the inner wall of the screen tube body 1.

[0042] Specifically, a guide hole 204 is provided on the support plate 203, the lifting screw rod 4 is inserted into the guide hole 204, a guide rail 205 is fixedly connected to the hole wall of the guide hole 204, guide grooves 401 are provided on both sides of the lifting screw rod 4, the guide grooves 401 slide along the guide rails 205, the top of the swivel 5 is connected to the bottom of the support plate 203 through a bearing, and the lifting screw rod 4 threadedly passes through the middle of the swivel 5.

[0043] By adopting the above scheme, when the swivel 5 rotates, due to the threaded connection between the lifting screw rod 4 and the swivel 5, and the guiding effect of the guide hole 204, the guide slide rail 205 and the guide slide groove 401 on the lifting screw rod 4, it is convenient to drive the lifting screw rod 4 to move up and down along the inner wall of the screen tube body 1, that is, drive the scraping and sweeping assembly to move up and down to perform a scraping operation, so as to facilitate the cleaning operation of the screen tube body 1 at different depths.

[0044] Specifically, a toothed disc 302 is fixedly connected to the bottom of the inner ring cylinder 301 , a toothed ring 501 is sleeved and fixed on the outer wall of the bottom of the rotating ring 5 , and the toothed ring 501 is meshedly connected with the toothed disc 302 .

[0045] By adopting the above scheme, through the meshing transmission principle of the toothed disc 302 and the toothed ring 501, when the turntable 2 drives the lifting screw rod 4 and the swivel ring 5 to rotate synchronously along the inner wall of the screen tube, the toothed ring 501 of the swivel ring 5 can be driven to rotate along the toothed disc 302 of the inner ring cylinder 301, thereby realizing the self-rotation movement of the swivel ring 5, and then facilitating the swivel ring 5 to drive the rotating cylinder 6 to rotate through the telescopic part, that is, realizing the rotation movement of the hammering assembly, thereby realizing the hammering and crushing and cutting operations of the firm dirt, and effectively enhancing the self-cleaning strength and working efficiency of the screen tube.

[0046] Specifically, the telescopic member includes an ear plate 502, a first telescopic plate 504 and a second telescopic plate 506. The bottom of the swivel 5 and the top of the rotating drum 6 are fixedly connected with the ear plate 502. The ends of the ear plate 502 are hinged with the first telescopic plate 504. The ends of the first telescopic plate 504 are hinged with the second telescopic plate 506. A plurality of second telescopic plates 506 are provided and are hingedly connected at the head and tail.

[0047] By adopting the above scheme, the stability of the connection structure between the swivel 5 and the drum 6 is effectively improved through the telescopic part, so that the rotating swivel 5 can drive the drum 6 to rotate synchronously. At the same time, the drum 6 can drive the hammering assembly to move up and down along with the lifting screw 4. It is flexible to use and is conducive to improving the use efficiency of the hammering assembly, thereby enhancing the cleaning efficiency of dirt removal.

[0048] Specifically, a receiving groove 507 is opened in the middle of the ear plate 502, and a support rod 503 is fixedly connected to the receiving groove 507. The first telescopic plate 504 is slidably sleeved on the support rod 503. A shaft rod 505 is slidably inserted between the ends of the first telescopic plate 504 and the second telescopic plate 506 and between the ends of the second telescopic plate 506. Both ends of the shaft rod 505 are threadedly sleeved with threaded covers 508.

[0049] The above scheme is adopted to facilitate the upward and downward contraction and movement of the telescopic part. Through the folding, contraction and extension between the first telescopic plate 504 and the second telescopic plate 506, the rotating drum 6 can be conveniently moved up and down following the lifting screw rod 4, which is easy to use. Then, the hammering assembly can not only perform rotary hammering and crushing work, but also move up and down, effectively enhancing the dirt cleaning effect.

[0050] Specifically, the rotating drum 6 is slidably sleeved on the lifting screw rod 4, and the scraping plate 402 is fixedly connected to the bottom of the lifting screw rod 4 by bolts.

[0051] The above solution facilitates the rotation of the drum 6 and the installation and removal of the scraper plate 402. The scraper plate 402 is convenient for limiting the position of the drum 6, and is easy to use and highly stable.

[0052] Specifically, the hammer block 601 is fixedly connected to the middle of the outer wall of the rotating drum 6 by bolts, and the upper and lower outer walls of the rotating drum 6 are both threadedly sleeved with threaded rings 603, and the outer wall of the threaded ring 603 is fixedly connected with evenly distributed rotary cutting blades 602.

[0053] The above scheme effectively improves the stability of the connection structure between the hammer block 601, the rotary cutting blade 602 and the rotating drum 6, and facilitates the installation and disassembly of the hammer block 601 and the rotary cutting blade 602, thereby facilitating their replacement, and is flexible to use and has a wide range of applications.

[0054] Specifically, a clearance groove 303 is formed on the bottom side wall of the top cover 3 , and the edge of the gear 201 extends into the clearance groove 303 .

[0055] The above solution facilitates the meshing transmission between the gear 201 and the teeth 206 of the turntable 2, thereby facilitating the turntable 2 to rotate.

[0056] Working principle of the present invention:

[0057] During use, when the screen tube body 1 needs to be automatically cleaned, the motor 202 is started to drive the turntable 2 to rotate, and the lifting screw rod 4 is driven to rotate along the inner wall of the screen tube body 1. At the same time, the turntable 2 and the inner ring cylinder 301 drive the lifting screw rod 4 to move up and down through the rotating ring 5. In this way, the scraping plate 402 on the lifting screw rod 4 can not only perform a rotating and sweeping motion along the inner wall of the screen tube body 1, but also move up and down, so as to clean and scrape the dirt at different heights. At the same time, the rotating ring 5 can drive the rotating drum 6 to rotate through the telescopic member, and the rotating drum 6 is provided with a scraping plate 402 on the scraping plate 402. A hammering block 601 and a rotary cutting blade 602 are equipped. When the rotating drum 6 rotates, the hammering block 601 and the rotary cutting blade 602 are driven to rotate together. Since the hammering assembly is located at the lower part of the lifting screw rod 4 and can move up and down with the scraping assembly, when encountering firm dirt, the rotating hammering block 601 rotates and hammers it to loosen it, thereby improving the scraping effect of the scraping plate 402 on the dirt. For easily entangled and blocked dirt, the rotating rotary cutting blade 602 rotary cuts and breaks it, which is beneficial to enhance the cleaning force, thereby effectively improving the working efficiency of dirt cleaning.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] 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. A self-cleaning geothermal well screen for geothermal development, comprising a screen body (1), characterized in that: The top outer wall of the screen tube body (1) is fixedly connected to a fixing plate (101) by means of bolts, a rotating disk (2) is connected to the fixing plate (101) by means of a bearing, a scraping assembly is mounted on the rotating disk (2), the scraping assembly comprises a lifting screw rod (4) and a scraping plate (402), a top cover (3) is fixedly connected to the fixing plate (101), an inner ring cylinder (301) is fixedly connected to the inner top of the top cover (3), the lifting screw rod (4) is located between the screen tube body (1) and the inner ring cylinder (301), a rotating ring (5) is threadedly sleeved on the lifting screw rod (4), and the lifting screw rod (4) is provided with a plurality of screw threads. The lower part is sleeved with a hammering assembly, the hammering assembly comprising a rotating drum (6) and a hammering block (601), the rotating disk (2) can drive the lifting screw (4) to rotate along the inner wall of the screen tube body (1), the rotating disk (2) and the inner ring cylinder (301) can drive the lifting screw (4) to move up and down through the rotating ring (5), the rotating ring (5) can drive the rotating drum (6) to rotate through the telescopic member, the rotating disk (2) is sleeved on the periphery of the screen tube body (1), and the top inner wall of the rotating disk (2) is fixedly connected with evenly distributed support plates (203), the support plate (203) is provided with four and the lifting screw ( 4) is slidably plugged into the corresponding support plate (203), the outer wall of the bottom of the rotating disk (2) is fixedly connected with uniformly distributed teeth (206), the fixed plate (101) is connected with a gear (201) via a bearing, the side wall of the fixed plate (101) is fixedly connected with a fixed seat (102), the fixed seat (102) is fixedly mounted with a motor (202), the output end of the motor (202) is fixedly connected to the middle of the gear (201), the gear (201) and the teeth (206) are meshedly connected, and the bottom of the inner ring cylinder (301) is fixedly connected with a toothed disk (302) ), a toothed ring (501) is sleeved and fixed on the outer wall of the bottom of the rotating ring (5), the toothed ring (501) is meshingly connected with the toothed disc (302), the telescopic member comprises an ear plate (502), a first telescopic plate (504) and a second telescopic plate (506), the bottom of the rotating ring (5) and the top of the rotating drum (6) are both fixedly connected with the ear plate (502), the ends of the ear plates (502) are both hingedly connected to the first telescopic plate (504), the ends of the first telescopic plate (504) are hingedly connected to the second telescopic plate (506), and a plurality of second telescopic plates (506) are provided and are hingedly connected at their ends.

2. A self-cleaning geothermal well screen for geothermal development according to claim 1, characterized in that: The support plate (203) is provided with a guide hole (204), the lifting screw rod (4) is inserted into the guide hole (204), a guide rail (205) is fixedly connected to the hole wall of the guide hole (204), both sides of the lifting screw rod (4) are provided with guide grooves (401), the guide grooves (401) slide along the guide rails (205), the top of the rotating ring (5) is connected to the bottom of the support plate (203) through a bearing, and the lifting screw rod (4) is threaded through the middle of the rotating ring (5).

3. A self-cleaning geothermal well screen for geothermal development according to claim 1, characterized in that: A receiving groove (507) is provided in the middle of the ear plate (502), a support rod (503) is fixedly connected to the receiving groove (507), the first telescopic plate (504) is slidably sleeved on the support rod (503), a shaft rod (505) is slidably inserted between the ends of the first telescopic plate (504) and the second telescopic plate (506) and between the ends of the second telescopic plate (506), and threaded covers (508) are threadedly sleeved on both ends of the shaft rod (505).

4. A self-cleaning geothermal well screen for geothermal development according to claim 1, characterized in that: The rotating cylinder (6) is slidably sleeved on the lifting screw rod (4), and the scraping plate (402) is fixedly connected to the bottom of the lifting screw rod (4) by means of bolts.

5. A self-cleaning geothermal well screen for geothermal development according to claim 1, characterized in that: The hammer block (601) is fixedly connected to the middle part of the outer wall of the rotating drum (6) by means of bolts. The outer walls of the upper and lower ends of the rotating drum (6) are both threadedly sleeved with threaded rings (603). The outer wall of the threaded ring (603) is fixedly connected with evenly distributed rotary cutting blades (602).

6. A self-cleaning geothermal well screen for geothermal development according to claim 1, characterized in that: A clearance groove (303) is provided on the bottom side wall of the top cover (3), and the edge of the gear (201) extends into the clearance groove (303).

Images