Shale gas exploitation desanding device

Abstract

The invention discloses a shale gas exploitation desanding device, and belongs to the technical field of shale gas desanding, the shale gas exploitation desanding device comprises: a bottom plate, a driving mechanism and two outer cylinders are arranged on the bottom plate, and a desanding cylinder is rotatably connected between the two outer cylinders; a filter plate and a vibration mechanism are arranged in the desanding cavity; a blanking port, wherein a sealing plate in sliding connection with the outer wall of the desanding cylinder is arranged at the blanking port; the linkage mechanism and the transmission mechanism are arranged on the outer wall of the desanding cylinder; according to the scheme, the linkage mechanism can be matched with the vibration mechanism to vibrate the filter plate in the desanding cavity, and the situation that the filter plate is blocked can be effectively prevented; when the transmission mechanism is located at the bottom, the transmission mechanism enables the sealing plate located at the bottom at the moment to be opened in a rotating mode, sand in the sand removing cavity falls out of the discharging opening, it is not needed to stop exploiting and conveying of shale gas for cleaning, time and labor are saved, normal exploiting, conveying and filtering of the shale gas are not affected, and high practicability is achieved; the device can be widely popularized and used.

Description

Technical Field

[0001] The invention relates to the technical field of shale gas desanding, and more specifically to a shale gas exploitation desanding device. Background Art

[0002] Shale gas refers to natural gas stored in shale layers and is an unconventional natural gas resource. The extraction of shale gas mainly relies on advanced drilling technology and hydraulic fracturing technology. There are a large number of solid particles such as rock cuttings and sand in shale gas. These solid particles are carried out of the wellhead by the high-speed flow of natural gas. These sand bodies will cause wear or blockage on wellhead equipment, pipelines, compressors, etc., and will also affect the quality of natural gas. Therefore, the sand bodies need to be filtered during shale gas extraction. Sand removal is crucial to protecting ground equipment, improving gas quality, and ensuring the efficiency of the entire production system.

[0003] At present, the produced shale gas is mainly passed into the sand removal box, and the sand is filtered through the filter plate inside it. However, after a period of use, a lot of sand will remain in the filter plate and the sand removal box, which will affect the transportation efficiency of the shale gas and easily cause the filter plate to be blocked. This requires stopping the production and transportation of shale gas, and then the staff will clean the sand removal box and the filter plate. This not only consumes more labor and time, has low sand removal efficiency, but also leads to slow progress in shale gas production and poor production results.

[0004] Therefore, it is necessary to provide a shale gas mining and sand removal device to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a shale gas mining and sand removal device to solve the above technical problems.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] Shale gas production and sand removal device, including:

[0008] A bottom plate is provided with a driving mechanism and two outer cylinders, a sand removal cylinder is rotatably connected between the two outer cylinders, the driving mechanism is used to drive the sand removal cylinder to rotate, and an air inlet pipe and an air outlet pipe are respectively provided on the two outer cylinders;

[0009] A plurality of sand removal chambers are provided, which are opened in the sand removal cylinder from front to back and are provided with a filter plate and a vibration mechanism;

[0010] A material drop opening is provided on the outer wall of the sand removal cylinder and communicates with the sand removal chamber, and a sealing plate is provided at the material drop opening and is slidably connected to the outer wall of the sand removal cylinder;

[0011] The linkage mechanism and the transmission mechanism are arranged on the outer wall of the sand removal cylinder. The linkage mechanism vibrates the filter plate by cooperating with the vibration mechanism, and the transmission mechanism drives the sealing plate at the bottom to rotate.

[0012] Furthermore, a circular ring coaxial with the sand removal cylinder is arranged on the bottom plate, a plurality of first tooth blocks are arranged on the inner side wall of the circular ring, an extension plate is arranged on one side of the circular ring, and a plurality of second tooth blocks are arranged on the extension plate.

[0013] Furthermore, the linkage mechanism comprises:

[0014] A first rotating shaft, rotatably disposed on the outer wall of the sand removing cylinder, one end of the first rotating shaft is located outside the sand removing cylinder and is provided with a first bevel gear, and the other end of the first rotating shaft is located in the sand removing chamber and is provided with a cam;

[0015] The trigger mechanism is arranged on the outer wall of the sand removing cylinder and is used for driving the first rotating shaft to rotate.

[0016] Furthermore, the trigger mechanism includes:

[0017] A fixed plate is arranged on the outer wall of the sand removing cylinder, a second rotating shaft is rotatably arranged on the fixed plate, a first spur gear and a second bevel gear are respectively arranged at both ends of the second rotating shaft, the first spur gear is intermittently meshed with the first gear block, and the second bevel gear is meshed with the first bevel gear.

[0018] Furthermore, the vibration mechanism comprises:

[0019] A sliding plate is elastically and telescopically arranged on the inner wall of the sand removal chamber, a vibration rod is arranged on one side of the sliding plate facing the filter plate, and a vibration plate is arranged at the end of the vibration rod.

[0020] Furthermore, a slide groove is provided on the inner wall of the sand removal chamber, a slider connected to the sliding plate is slidably provided on the inner wall of the slide groove, and a first elastic member is provided between the slider and the inner wall of the slide groove.

[0021] Furthermore, a limiting groove is provided on the inner wall of the slide groove, and a limiting block connected to the sliding block is slidably provided on the inner wall of the limiting groove.

[0022] Furthermore, an arc groove is provided on the outer wall of the sand removal cylinder, a connecting plate connected to the sealing plate is slidably arranged inside the arc groove, a second elastic member is arranged between the connecting plate and the inner wall of the arc groove, and a plurality of third tooth blocks are arranged on the outer wall of the sealing plate.

[0023] Furthermore, the transmission mechanism comprises:

[0024] A support plate is arranged on the outer wall of the sand removing cylinder, and two rotating rods are rotatably arranged on the support plate. A second spur gear and a third spur gear are respectively arranged on the two rotating rods. The second spur gear and the third spur gear are meshed with each other, and the second spur gear is also intermittently meshed with the second gear block, and the third spur gear is meshed with the third gear block.

[0025] Furthermore, the driving mechanism comprises:

[0026] A driving member is arranged on the bottom plate, and a driving gear is arranged at an output end of the driving member;

[0027] The outer gear ring is arranged on the outer wall of the sand removing cylinder and meshes with the driving gear.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In this scheme, the driving mechanism will drive the sand removal cylinder to rotate. When the linkage mechanism rotates to the side trigger position, it will vibrate the filter plate in the sand removal chamber by cooperating with the vibration mechanism. Under the action of the knocking vibration, the sand on the filter plate in the side sand removal chamber can fall off, thereby greatly avoiding the situation where there are a lot of sand bodies remaining on the filter plate. The filter plate can be vibrated and cleaned in time and continuously, which can effectively prevent the filter plate from being blocked, thereby improving the process effect and efficiency of shale gas, and is highly practical.

[0030] 2. In the present scheme, when the sand removal cylinder continues to rotate and the transmission mechanism is at the bottom position, the transmission mechanism will cause the sealing plate at the bottom to rotate to expose the discharge port. At this time, the sand body in the sand removal chamber will fall out from the discharge port. The rotation of the sand removal cylinder can cyclically clean the sand bodies in the sand removal chambers at different positions, thus avoiding the current situation where the shale gas mining and transportation needs to be stopped for cleaning. Not only does it not require frequent cleaning by the staff, thus saving a lot of labor and time, and having high sand removal efficiency, it also does not affect the normal mining, transportation and filtration of shale gas, thus accelerating the mining process of shale gas. It has high practicality and can be widely promoted and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the sand removal device of the present invention;

[0032] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0033] Figure 3 This is a structural schematic diagram of the sand removal device of the present invention from another side perspective;

[0034] Figure 4 for Figure 3The enlarged structural diagram at B in the middle;

[0035] Figure 5 This is a schematic diagram of the structure of the sand removal cylinder from the bottom perspective of the present invention;

[0036] Figure 6 for Figure 5 The enlarged structural diagram at C in the middle;

[0037] Figure 7 This is a schematic diagram of the front view structure of the sand removal cylinder of the present invention after the outer cylinder is removed;

[0038] Figure 8 This is a schematic diagram of the internal structure of one of the sand removal chambers of the sand removal cylinder of the present invention;

[0039] Fig. 9 for Figure 8 The enlarged structural diagram at D in the middle;

[0040] Fig.10 It is a cross-sectional structural schematic diagram of the sand removal cylinder of the present invention;

[0041] Fig.11 for Fig.10 Enlarged structural diagram at E in the middle.

[0042] Description of the numbers in the figure:

[0043] 1. Bottom plate; 2. Outer cylinder; 3. Sand removal cylinder; 4. Driving mechanism; 41. Driving member; 42. Driving gear; 43. Outer gear ring; 415. Air inlet pipe; 6. Air outlet pipe; 7. Sand removal chamber; 8. Filter plate; 9. Vibrating mechanism; 91. Sliding plate; 92. Vibrating rod; 93. Vibrating plate; 10. Dropping port; 11. Closing plate; 12. Linkage mechanism; 121. First rotating shaft; 122. First bevel gear; 123. Cam; 124. Trigger mechanism; 1241. Fixed plate; 1 242, second rotating shaft; 1243, first spur gear; 1244, second bevel gear; 13, transmission mechanism; 131, support plate; 132, rotating rod; 133, second spur gear; 134, third spur gear; 14, circular ring; 15, first tooth block; 16, extension plate; 17, second tooth block; 18, slide groove; 19, slider; 20, first elastic member; 21, arc groove; 22, second elastic member; 23, third tooth block; 24, limit groove; 25, limit block; 26,;. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-11 , shale gas mining and sand removal device, including:

[0046] A bottom plate 1 is provided with a driving mechanism 4 and two outer cylinders 2, a sand removal cylinder 3 is rotatably connected between the two outer cylinders 2, the driving mechanism 4 is used to drive the sand removal cylinder 3 to rotate, and an air inlet pipe 5 and an air outlet pipe 6 are respectively provided on the two outer cylinders 2;

[0047] A plurality of sand removal chambers 7 are provided, which are arranged in the sand removal cylinder 3 from front to back, and a filter plate 8 and a vibration mechanism 9 are provided in the sand removal chamber 7;

[0048] A material drop opening 10 is provided on the outer wall of the sand removal cylinder 3 and communicates with the sand removal chamber 7. A sealing plate 11 is provided at the material drop opening 10 and is slidably connected to the outer wall of the sand removal cylinder 3.

[0049] The linkage mechanism 12 and the transmission mechanism 13 are arranged on the outer wall of the sand removal cylinder 3. The linkage mechanism 12 vibrates the filter plate 8 by cooperating with the vibration mechanism 9, and the transmission mechanism 13 drives the sealing plate 11 at the bottom to rotate.

[0050] When in use, the driving mechanism 4 of the device will drive the desanding cylinder 3 to rotate, and the desanding cylinder 3 will rotate slowly during operation. The mined shale gas will be connected to the air inlet pipe 5 through the pipeline, and each desanding chamber 7 in the desanding cylinder 3 will be circulated and connected to the air inlet pipe 5 and the air outlet pipe 6 respectively. The shale gas in the air inlet pipe 5 will enter the desanding chamber 7 connected thereto, and then the sand body will be filtered by the filter plate 8 in the desanding chamber 7, and then the shale gas will be discharged from the air outlet pipe 6 to the next process. The shale gas introduced from the air inlet pipe 5 is always connected to one or more desanding chambers 7 located at the upper position, and the desanding chamber 7 located at the lower or lower side is not connected to the air inlet pipe 5.

[0051] The sand filtered by the filter plate 8 will remain in the sand removal chamber 7 or partially remain on the filter plate 8. During the rotation of the sand removal cylinder 3, when the linkage mechanism 12 rotates to the side trigger position, the filter plate 8 in the sand removal chamber 7 will be vibrated in cooperation with the vibration mechanism 9. Under the action of the knocking vibration, the sand on the filter plate 8 in the side sand removal chamber 7 can fall off, thereby greatly avoiding the situation where a lot of sand remains on the filter plate 8, and the filter plate 8 can be vibrated and cleaned in a timely and continuous manner, which can effectively prevent the filter plate 8 from being blocked, thereby improving the process effect and efficiency of shale gas, and having strong practicality.

[0052] During the continuous rotation of the sand removal cylinder 3, when the transmission mechanism 13 is at the bottom position, the transmission mechanism 13 will cause the sealing plate 11 at the bottom to rotate, and the sealing plate 11 will gradually rotate to expose the discharge port 10, and the sand bodies in the sand removal chamber 7 will fall out from the discharge port 10, so that the sand bodies in the sand removal chamber 7 can be automatically cleaned, and the sand bodies in the sand removal chamber 7 at different positions can be cleaned cyclically by the rotation of the sand removal cylinder 3. By cleaning the sand bodies in the sand removal chamber 7 and the sand bodies on the filter plate 8 during the normal exploitation and filtration of shale gas, the current situation of stopping the exploitation and transportation of shale gas for cleaning is avoided. Not only does it not require frequent cleaning by the staff, it saves a lot of labor and time, and the sand removal efficiency is high, but it also does not affect the normal exploitation, transportation and filtration of shale gas, greatly speeding up the exploitation process of shale gas, and has high practicality, and can be widely promoted and used.

[0053] When the sand removal cylinder 3 continues to rotate so that the transmission mechanism 13 and the sealing plate 11 at the bottom are moved away, the sealing plate 11 will return to the initial position, so that the sealing plate 11 will seal the material outlet 10 again, and continue to rotate to repeat the shale gas filtration and the vibration of the filter plate 8 and the sand cleaning process.

[0054] In this embodiment, preferably, please refer to Figure 1-5 and Figure 7-10 The bottom plate 1 is provided with a circular ring 14 coaxial with the sand removal cylinder 3, and a plurality of first tooth blocks 15 are provided on the inner side wall of the circular ring 14. An extension plate 16 is also provided on one side of the circular ring 14, and a plurality of second tooth blocks 17 are provided on the extension plate 16. When the linkage mechanism 12 rotates to the side, it will cooperate with the first tooth block 15, so that the filter plate 8 in the sand removal chamber 7 will be vibrated through the vibration mechanism 9; when the transmission mechanism 13 is at the bottom position, the transmission mechanism 13 rotates the bottom sealing plate 11 through the cooperation with the second tooth block 17.

[0055] In this embodiment, preferably, please refer to Figure 1 , Figure 3-5 and Figure 8-11 , the linkage mechanism 12 comprises:

[0056] The first rotating shaft 121 is rotatably arranged on the outer wall of the sand removal cylinder 3. One end of the first rotating shaft 121 is located outside the sand removal cylinder 3 and is provided with a first bevel gear 122. The other end of the first rotating shaft 121 is located in the sand removal chamber 7 and is provided with a cam 123. The trigger mechanism 124 is arranged on the outer wall of the sand removal cylinder 3 and is used to drive the first rotating shaft 121 to rotate. When the trigger mechanism 124 of the linkage mechanism 12 rotates to the side, it will cooperate with the first gear block 15, and the first rotating shaft 121 will be driven to rotate through the trigger mechanism 124, and the first rotating shaft 121 will drive the cam 123 to rotate. The rotation of the cam 123 will cause the vibration mechanism 9 to vibrate the filter plate 8 in the sand removal chamber 7.

[0057] In this embodiment, preferably, please refer to Figure 3-4 , Figure 8-11 , the trigger mechanism 124 includes:

[0058] The fixed plate 1241 is arranged on the outer wall of the sand removing cylinder 3, and the second rotating shaft 1242 is rotatably arranged on the fixed plate 1241, and the first spur gear 1243 and the second bevel gear 1244 are respectively arranged at both ends of the second rotating shaft 1242, and the first spur gear 1243 is intermittently meshed with the first tooth block 15, and the second bevel gear 1244 is meshed with the first bevel gear 122. When the sand removing cylinder 3 rotates so that the first spur gear 1243 is meshed with the first tooth block 15 on the ring 14, the first spur gear 1243 will rotate, and the first spur gear 1243 will drive the second rotating shaft 1242 and the second bevel gear 1244 to rotate, and the second bevel gear 1244 will drive the first bevel gear 122 and the first rotating shaft 121 to rotate.

[0059] In this embodiment, preferably, please refer to Figure 8-11 , the vibration mechanism 9 comprises:

[0060] The sliding plate 91 is elastically and telescopically arranged on the inner wall of the sand removal chamber 7. A vibration rod 92 is arranged on the side of the sliding plate 91 facing the filter plate 8, and a vibration plate 93 is arranged at the end of the vibration rod 92. A chute 18 is provided on the inner wall of the sand removal chamber 7. A slider 19 connected to the sliding plate 91 is slidably arranged on the inner wall of the chute 18. A first elastic member 20 is arranged between the slider 19 and the inner wall of the chute 18. The first elastic member 20 in the present application can be a spring or other elastic structure.

[0061] When the first rotating shaft 121 drives the cam 123 to rotate, when the long side of the cam 123 rotates to one side of the sliding plate 91, it will gradually push the sliding plate 91, so that the sliding plate 91 slides along the sliding groove 18 through the slider 19. At this time, the sliding plate 91 is in a compressed state, and the first elastic member 20 is compressed. When the cam 123 rotates to its long side and disengages from the sliding plate 91, it no longer pushes the sliding plate 91. The first elastic member 20 drives the slider 19 and the sliding plate 91 to move back and forth through the rebound force, and shakes back and forth, so that the sliding plate 91 will drive the vibration rod 92 and the vibration plate 93 to move, and the filter plate 8 in the sand removal chamber 7 will be knocked and vibrated through the vibration plate 93. Through the continuous rotation of the cam 123, the vibration plate 93 can cyclically vibrate the filter plate 8, thereby causing the sand on the filter plate 8 to fall, and the filter plate 8 is effectively cleaned, which greatly avoids the situation that the filter plate 8 will be blocked, and the use effect is good.

[0062] In this embodiment, preferably, please refer to Figure 8-11The inner wall of the slide groove 18 is provided with a limit groove 24, and the inner wall of the limit groove 24 is provided with a limit block 25 connected to the slider 19. When the slider 19 moves along the slide groove 18, the slider 19 drives the limit block 25 to slide along the limit groove 24, and the limit block 25 can provide a limit support for the slider 19, and can also improve the stability of the movement of the slider 19 and the sliding plate 91.

[0063] In this embodiment, preferably, please refer to Figure 1-3 , Figure 2-6 and Figure 8-10 , the outer wall of the sand removal tube 3 is provided with an arc groove 21, and a connecting plate connected to the sealing plate 11 is slidably arranged inside the arc groove 21, and a second elastic member 22 is arranged between the connecting plate and the inner wall of the arc groove 21, and a plurality of third tooth blocks 23 are arranged on the outer wall of the sealing plate 11. The second elastic member 22 in the present application can be a spring or other elastic structure. When the transmission mechanism 13 drives the sealing plate 11 at the bottom to rotate, the connecting plate on the sealing plate 11 will slide along the arc groove 21 and compress the second elastic member 22, and the sealing plate 11 will gradually open, exposing the blanking port 10 for the blanking process of the sand body; when the sealing plate 11 at the bottom loses the effect of the transmission mechanism 13, the rebound force of the second elastic member 22 will drive the sealing plate 11 to slide back, that is, the sealing plate 11 will eventually return to the initial state, and the sealing plate 11 will continue to seal the blanking port 10, without affecting the subsequent shale gas filtration operation.

[0064] In this embodiment, preferably, please refer to FIG. Figure 1-3 , Figure 5-6 and Figure 8 , the transmission mechanism 13 comprises:

[0065] The support plate 131 is arranged on the outer wall of the sand removal cylinder 3. Two rotating rods 132 are rotatably arranged on the support plate 131. The two rotating rods 132 are respectively provided with a second spur gear 133 and a third spur gear 134. The second spur gear 133 and the third spur gear 134 are meshed with each other. The second spur gear 133 is also intermittently meshed with the second tooth block 17. The third spur gear 134 is meshed with the third tooth block 23. When the sand removal cylinder 3 continues to rotate, the transmission mechanism 13 is at the bottom position. After the second spur gear 133 is meshed with the second tooth block 17, the second spur gear 133 will rotate. At this time, the second spur gear 133 rotates counterclockwise. The second spur gear 133 will drive the third spur gear 134 to rotate clockwise. The third spur gear 134 will drive the sealing plate 11 to rotate through the third tooth block 23. At this time, the sealing plate 11 will rotate counterclockwise to open, thereby gradually exposing the blanking port 10 for blanking operation. After the subsequent rotation of the sand removal cylinder 3 drives the second spur gear 133 to rotate and no longer mesh with the second gear block 17, the second elastic member 22 will drive the sealing plate 11 to rotate toward the initial state, and finally the sealing plate 11 will seal the blanking port 10 again, and the operation will be repeated in sequence.

[0066] In this embodiment, preferably, please refer to FIG. Figure 1 , Figure 3 , Figure 5 and Figure 8 , the driving mechanism 4 comprises:

[0067] The driving member 41 is disposed on the bottom plate 1, and a driving gear 42 is disposed at the output end of the driving member 41; the outer gear ring 43 is disposed on the outer wall of the sand removal cylinder 3 and meshes with the driving gear 42. When the driving member 41 is started, the driving gear 42 is driven to rotate, and the driving gear 42 drives the outer gear ring 43 and the sand removal cylinder 3 to rotate.

[0068] It should be understood that the examples and implementation modes described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on the examples and implementation modes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0069] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0070] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. Shale gas mining and sand removal device, characterized in that: include: A bottom plate (1) is provided with a driving mechanism (4) and two outer cylinders (2), a sand removal cylinder (3) is rotatably connected between the two outer cylinders (2), the driving mechanism (4) is used to drive the sand removal cylinder (3) to rotate, and an air inlet pipe (5) and an air outlet pipe (6) are respectively provided on the two outer cylinders (2); A plurality of sand removal chambers (7) are provided in the sand removal cylinder (3) and are arranged to penetrate the sand removal cylinder (3) from front to back. A filter plate (8) and a vibration mechanism (9) are provided in the sand removal chamber (7); A material drop opening (10) is provided on the outer wall of the sand removal cylinder (3) and communicates with the sand removal chamber (7); a sealing plate (11) is provided at the material drop opening (10) and is slidably connected to the outer wall of the sand removal cylinder (3); The linkage mechanism (12) and the transmission mechanism (13) are arranged on the outer wall of the sand removal cylinder (3); the linkage mechanism (12) vibrates the filter plate (8) by cooperating with the vibration mechanism (9); and the transmission mechanism (13) drives the sealing plate (11) at the bottom to rotate.

2. The shale gas mining and sand removal device according to claim 1, characterized in that: The bottom plate (1) is provided with a circular ring (14) coaxial with the sand removal cylinder (3), the inner side wall of the circular ring (14) is provided with a plurality of first tooth blocks (15), and an extension plate (16) is further provided on one side of the circular ring (14), and a plurality of second tooth blocks (17) are provided on the extension plate (16).

3. The shale gas mining and sand removal device according to claim 2 is characterized in that: The linkage mechanism (12) comprises: A first rotating shaft (121) is rotatably arranged on the outer wall of the sand removal cylinder (3), one end of the first rotating shaft (121) is located outside the sand removal cylinder (3) and is provided with a first bevel gear (122), and the other end of the first rotating shaft (121) is located in the sand removal chamber (7) and is provided with a cam (123); The trigger mechanism (124) is arranged on the outer wall of the sand removal cylinder (3) and is used to drive the first rotating shaft (121) to rotate.

4. The shale gas mining and sand removal device according to claim 3 is characterized in that: The trigger mechanism (124) comprises: A fixed plate (1241) is arranged on the outer wall of the sand removing cylinder (3); a second rotating shaft (1242) is rotatably arranged on the fixed plate (1241); a first spur gear (1243) and a second bevel gear (1244) are respectively arranged at two ends of the second rotating shaft (1242); the first spur gear (1243) is intermittently meshed with the first gear block (15); and the second bevel gear (1244) is meshed with the first bevel gear (122).

5. The shale gas mining and sand removal device according to claim 4, characterized in that: The vibration mechanism (9) comprises: A sliding plate (91) is elastically and telescopically arranged on the inner wall of the sand removal chamber (7); a vibration rod (92) is arranged on the side of the sliding plate (91) facing the filter plate (8); and a vibration plate (93) is arranged at the end of the vibration rod (92).

6. The shale gas mining and sand removal device according to claim 5, characterized in that: The inner wall of the sand removal chamber (7) is provided with a slide groove (18), the inner wall of the slide groove (18) is slidably provided with a slider (19) connected to the sliding plate (91), and a first elastic member (20) is provided between the slider (19) and the inner wall of the slide groove (18).

7. The shale gas mining and sand removal device according to claim 2, characterized in that: The inner wall of the slide groove (18) is provided with a limit groove (24), and the inner wall of the limit groove (24) is slidably provided with a limit block (25) connected to the slide block (19).

8. The shale gas mining and sand removal device according to claim 2, characterized in that: The outer wall of the sand removal cylinder (3) is provided with an arc-shaped groove (21), a connecting plate connected to the sealing plate (11) is slidably arranged inside the arc-shaped groove (21), a second elastic member (22) is arranged between the connecting plate and the inner wall of the arc-shaped groove (21), and a plurality of third tooth blocks (23) are arranged on the outer wall of the sealing plate (11).

9. The shale gas mining and sand removal device according to claim 8, characterized in that: The transmission mechanism (13) comprises: A support plate (131) is arranged on the outer wall of the sand removing cylinder (3), and two rotating rods (132) are rotatably arranged on the support plate (131). The two rotating rods (132) are respectively provided with a second spur gear (133) and a third spur gear (134). The second spur gear (133) and the third spur gear (134) are meshed with each other, and the second spur gear (133) is also intermittently meshed with the second tooth block (17), and the third spur gear (134) is meshed with the third tooth block (23).

10. The shale gas mining and sand removal device according to claim 1, characterized in that: The driving mechanism (4) comprises: A driving member (41) is arranged on the bottom plate (1), and a driving gear (42) is arranged at the output end of the driving member (41); An outer gear ring (43) is arranged on the outer wall of the sand removing cylinder (3) and meshes with the driving gear (42).

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