A shale gas rapid desorption test device and method

Abstract

The present invention belongs to the field of shale gas technology, and in particular to a shale gas rapid desorption test device and method. Aiming at the problem that shale gas molecules have strong adsorption force and are difficult to desorb, and the shale itself has low permeability, resulting in a long experimental time for shale gas desorption test, the following scheme is proposed, including a main box, wherein a crushing and screening module is arranged inside the main box, and the crushing and screening module includes a base and a fixed cylinder, the base and the fixed cylinder are fixedly connected to the bottom inner wall of the main box, the inner wall of the fixed cylinder is slidably connected to a mounting cylinder, an acceleration module is arranged on the mounting cylinder, and a tray is fixedly connected to the bottom inner wall of the mounting cylinder. A shale gas rapid desorption test device and method disclosed by the present invention can make shale sample particles vibrate in the vertical direction during desorption, and at the same time, stirring with a stirring paddle can make the gas inside the shale sample more fully contact the desorption environment, thereby accelerating the desorption process.

Description

Technical Field

[0001] The present invention relates to the technical field of shale gas, and in particular to a shale gas rapid desorption testing device and method. Background Art

[0002] Shale gas desorption is a method to determine the gas content of shale. It refers to obtaining the actual gas content by measuring the desorption behavior of on-site drilling cores or representative cuttings. The gas content of shale is an important parameter for calculating the potential of shale gas resources and predicting reserves, and is of great significance to shale gas exploration and development. Shale gas desorption instruments are used to detect the gas content of shale.

[0003] In the prior art, due to the special occurrence state of shale gas, its adsorption force is strong, making it difficult to desorb gas molecules, and the permeability of shale itself is low, resulting in a long experimental time for shale gas desorption test, affecting work efficiency. Summary of the invention

[0004] The invention discloses a shale gas rapid desorption test device and method, aiming to solve the technical problems in the background technology that shale gas molecules have strong adsorption force and are difficult to desorb, and the permeability of shale itself is low, resulting in a long experimental time for shale gas desorption test.

[0005] A shale gas rapid desorption test device proposed in the present invention comprises a main box body, a crushing and screening module is arranged inside the main box body, and the crushing and screening module comprises a base and a fixed cylinder, the base and the fixed cylinder are fixedly connected to the bottom inner wall of the main box body, the inner wall of the fixed cylinder is slidably connected with a mounting cylinder, an acceleration module is arranged on the mounting cylinder, the bottom inner wall of the mounting cylinder is fixedly connected with a tray, the acceleration module comprises a rotating rod, the rotating rod is movably connected to the bottom of the mounting cylinder, the top of the rotating rod is fixedly connected with a stirring paddle, the bottom end of the rotating rod is fixedly connected with a bevel gear 1, a sealing module is arranged on the top of the main box body, the sealing module comprises two sliding plates, two sliding grooves are opened on the top of the main box body, the two sliding plates both slide in the corresponding sliding grooves, and the top of the two sliding plates is provided with the same sealing door.

[0006] In a preferred embodiment, the inner wall of the mounting cylinder is fixedly connected to a ring frame, a plurality of movable kits are slidably connected to the sliding frame, the bottom inner walls of the plurality of movable kits are fixedly connected to a spring 1, and the inner walls of the plurality of movable kits are slidably connected to an impact head, the plurality of impact heads are fixedly connected to the corresponding spring 1, and a connecting rod is fixedly connected between two movable kits on the same side.

[0007] In a preferred solution, a servo motor is fixedly connected to the inner wall of one side of the mounting cylinder, a curved rod is fixedly connected to the output end of the servo motor, two movable rods are movably connected to the outer wall of the curved rod, one end of the two movable rods away from the curved rod are movably connected to the corresponding connecting rod, and a bevel gear 2 is fixedly connected to the outer wall of the curved rod, and the bevel gear 2 is meshed with the bevel gear 1.

[0008] By providing an acceleration module, the servo motor rotates the curved rod, which meshes and drives the rotating rod and the stirring paddle to rotate, so as to stir the sample. At the same time, the movable rod moves up and down with the rotation of the curved rod, driving the movable kit to slide back and forth up and down, so that the impact head continuously impacts the bottom of the installation tube to generate vibration, which can make the shale sample particles vibrate in the vertical direction, avoid shale particle agglomeration, and increase the contact opportunity between the particle surface and the surrounding environment. At the same time, the stirring paddle is used for stirring, which cooperates with the up and down vibration of appropriate frequency, so that the gas inside the shale sample can be more fully contacted with the desorption environment, thereby accelerating the desorption process.

[0009] In a preferred embodiment, an arc groove is provided on the base, and a movable ring is movably connected in the arc groove, a plurality of arc grooves are equidistantly provided on the circumference of the movable ring, sliding members are slidably connected in the plurality of arc grooves, the tops of the plurality of sliding members are fixedly connected to a sliding frame, the tops of the plurality of sliding frames are movably connected to support rods, and the ends of the plurality of support rods away from the sliding frame are movably connected to one side of the mounting tube.

[0010] In a preferred embodiment, the inner wall of the movable ring is fixedly connected with a gear ring, and the top of the base is fixedly connected with a driving motor, the output end of the driving motor is fixedly connected with a rotating gear 1, the rotating gear 1 is meshed with the gear ring, the inner wall of the mounting cylinder is fixedly connected with a mortar, and a plurality of fine-mesh holes are equidistantly provided on the circumference of the mortar.

[0011] In a preferred solution, a mounting frame is fixedly connected to the inner wall of the main box body, a mounting hole and a fixing hole are provided on the mounting frame, a rotating shaft is movably connected in the mounting hole, a grinding head is fixedly connected to the bottom of the rotating shaft, and a universal motor is fixedly connected in the fixing hole, a transmission wheel is fixedly connected to the top of the rotating shaft and the outer wall of the output end of the universal motor, and the outer walls of the two transmission wheels are slidably connected to the same transmission belt.

[0012] By setting up a crushing and screening module, the driving motor engages and rotates the movable ring, forcing the sliding frame to move away from the center, so that the mounting cylinder slides upward on the inner wall of the fixed cylinder until the mortar contacts the grinding head. The universal motor drives the grinding head to rotate through the transmission belt, and the shale sample in the mortar is ground. Powder with a suitable particle size falls into the tray from the fine mesh holes, integrating the crushing and screening processes, reducing the escape of shale gas in the sample, and improving the accuracy of the desorption data.

[0013] In a preferred solution, a plurality of fixing kits 1 are fixedly connected to the top of the main box body, a plurality of bottom inner walls of the fixing kits 1 are fixedly connected to springs 2, and the bottoms of the two sliding plates are fixedly connected to two fixing kits 2, one end of the plurality of springs 2 away from the fixing kits 1 is fixedly connected to the corresponding fixing kits 2, a rotating frame is fixedly connected to one side of the main box body, two sliding grooves are provided at the bottom of the sealing door, movable frames are slidably connected in the two sliding grooves, the two movable frames are centrally symmetrical, and sealing members are fixedly connected to the outer walls of the two movable frames on opposite sides.

[0014] In a preferred embodiment, a rotating hole is provided on the sealing door, a rotating shaft is movably connected in the rotating hole, a turning handle is connected to the top end of the rotating shaft, a turning handle rotating gear 2 is connected to the lower end of the rotating shaft, and racks are fixedly connected to the opposite sides of the two movable frames, and the two racks are meshed with the rotating gear 2.

[0015] In a preferred solution, a suction pump is fixedly connected to one side of the main box body, a delivery pipe is fixedly connected to the output end of the suction pump, and a brine tank and a collecting tank are fixedly connected to the outer wall of one side of the main box body, one end of the delivery pipe away from the suction pump is fixedly connected to the bottom of the brine tank, and a connecting pipe is fixedly connected to the top of the brine tank, and the connecting pipe is provided with a valve one on the top of the brine tank; a vacuum pump is provided on one side of the main box body, an exhaust pipe is fixedly connected to the output end of the vacuum pump, and one end of the exhaust pipe away from the vacuum pump is fixedly connected to the top of the main box body, and a valve two is provided on the exhaust pipe.

[0016] By providing a sealing module, the sealing door is pressed downward while being closed, forcing the compressed spring 2 to slide downward, and then the handle is turned to engage and drive the two movable frames to move toward each other. When the pressure stops, the elasticity of spring 2 allows the seal to fit tightly against the gap, further ensuring the sealing of the desorption environment and improving the accuracy of the desorption data.

[0017] A shale gas rapid desorption test method, using a shale gas rapid desorption test device as described above, comprises the following steps: Step 1: After placing the shale sample in the mortar, close the sealing door and press downward to force the sliding plate to compress the second spring and slide downward. Then, turn the handle to engage and drive the two movable frames to move toward each other. After stopping the pressing, the elasticity of the second spring makes the seal close to the gap to ensure the sealing inside the main box. Step 2: After the sealing is completed, start the vacuum pump to suck the air in the main box, close the second valve, start the drive motor to engage and rotate the movable ring, force the sliding frame to move away from the center, and make the mounting cylinder slide upward on the inner wall of the fixed cylinder until the mortar contacts the grinding head, start the universal motor to drive the grinding head to rotate, grind the shale sample, and the powder with a suitable particle size falls into the tray from the fine mesh hole; Step 3. After grinding is completed, the installation cylinder is reset, and the servo motor is started to rotate the crankshaft, driving the rotating rod and the stirring paddle to rotate to stir the sample. At the same time, the movable kit slides back and forth up and down, so that the impact head continuously impacts the bottom of the installation cylinder to generate vibration. At the same time, the suction pump is started to suck the main box body, and the valve is opened to allow the gas to pass through the brine tank and finally enter the collection tank.

[0018] From the above, it can be seen that the shale gas rapid desorption test device provided by the present invention can make the shale sample particles vibrate in the vertical direction through the acceleration module during the desorption process, thereby avoiding the agglomeration of shale particles and increasing the contact opportunity between the particle surface and the surrounding environment. At the same time, the stirring paddle is used for stirring, which cooperates with the up and down vibration of the appropriate frequency, so that the gas inside the shale sample can be more fully contacted with the desorption environment, thereby accelerating the desorption process; and the crushing and screening processes are integrated to reduce the escape of shale gas in the sample and improve the accuracy of the desorption data. At the same time, the sealing module is used to further ensure the sealing of the desorption environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a shale gas rapid desorption test device proposed by the present invention; Figure 2 A schematic diagram of the internal structure of a shale gas rapid desorption test device proposed by the present invention; Figure 3 A schematic diagram of the internal structure of a fixed cylinder of a shale gas rapid desorption test device proposed by the present invention; Figure 4 This is a schematic diagram of the structure of the movable ring of the crushing and screening module of a shale gas rapid desorption test device proposed by the present invention; Figure 5 A schematic diagram of the bottom structure of the installation tube of a shale gas rapid desorption test device proposed by the present invention; Figure 6 This is a schematic diagram of the structure of an acceleration module of a shale gas rapid desorption test device proposed by the present invention; Figure 7 This is a schematic diagram of the sealing module structure of a shale gas rapid desorption test device proposed in the present invention.

[0020] In the figure: 1, main box; 2, crushing and screening module; 201, base; 202, movable ring; 203, arc groove; 204, sliding member; 205, driving motor; 206, rotating gear 1; 207, gear ring; 208, sliding frame; 209, support rod; 210, rotating shaft; 211, transmission belt; 212, universal motor; 213, fixed cylinder; 214, mounting cylinder; 215, grinding head; 216, grinding mortar; 217, fine mesh hole; 218, transmission wheel; 219, mounting frame; 3, acceleration module; 301, ring frame; 302, rotating rod; 303, stirring paddle; 304, bevel gear 1; 305, servo motor; 306, curved Rod; 307, bevel gear two; 308, movable kit; 309, spring one; 310, impact head; 311, movable rod; 312, connecting rod; 4, sealing module; 401, sealing door; 402, rotating shaft; 403, turning handle; 404, rotating frame; 405, rotating gear two; 406, movable frame; 407, rack; 408, fixed kit one; 409, spring two; 410, fixed kit two; 411, seal; 412, sliding plate; 5, suction pump; 6, delivery pipe; 7, brine tank; 8, connecting pipe; 9, valve one; 10, collecting tank; 11, vacuum pump; 12, exhaust pipe; 13, valve two; 14, tray. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The shale gas rapid desorption test device disclosed in the present invention is mainly used in scenarios where shale gas molecules have strong adsorption force and are difficult to desorb, and the permeability of the shale itself is low, resulting in a long experimental time for the shale gas desorption test.

[0023] Reference Figure 1-7A shale gas rapid desorption test device comprises a main box body 1, a crushing and screening module 2 is arranged inside the main box body 1, and the crushing and screening module 2 comprises a base 201 and a fixed cylinder 213, the base 201 and the fixed cylinder 213 are fixedly connected to the bottom inner wall of the main box body 1, the inner wall of the fixed cylinder 213 is slidably connected with a mounting cylinder 214, an acceleration module 3 is arranged on the mounting cylinder 214, the bottom inner wall of the mounting cylinder 214 is fixedly connected with a tray 14, the acceleration module 3 comprises a rotating rod 302, the rotating rod 302 is movably connected to the bottom of the mounting cylinder 214, and the top of the rotating rod 302 is fixedly connected with a stirring paddle 303, and the bottom end of the rotating rod 302 is fixedly connected with a bevel gear 1 304, a sealing module 4 is arranged on the top of the main box body 1, and the sealing module 4 comprises two sliding plates 412, two sliding grooves are opened on the top of the main box body 1, the two sliding plates 412 both slide in the corresponding sliding grooves, and the tops of the two sliding plates 412 are provided with the same sealing door 401.

[0024] Reference Figure 1 , Figure 5 and Figure 6 The inner wall of the mounting cylinder 214 is fixedly connected with a ring frame 301, and a plurality of movable kits 308 are slidably connected to the sliding frame 208. The bottom inner walls of the plurality of movable kits 308 are fixedly connected with a spring 309, and the inner walls of the plurality of movable kits 308 are slidably connected with impact heads 310, and the plurality of impact heads 310 are fixedly connected with the corresponding spring 309, and a connecting rod 312 is fixedly connected between two movable kits 308 on the same side.

[0025] Reference Figure 1 , Figure 5 and Figure 6 A servo motor 305 is fixedly connected to the inner wall of one side of the mounting cylinder 214, a bent rod 306 is fixedly connected to the output end of the servo motor 305, two movable rods 311 are movably connected to the outer wall of the bent rod 306, one end of the two movable rods 311 away from the bent rod 306 is movably connected to the corresponding connecting rod 312, and a bevel gear 2 307 is fixedly connected to the outer wall of the bent rod 306, and the bevel gear 2 307 is meshed with the bevel gear 1 304.

[0026] In a specific application scenario, the servo motor 305 is started to rotate the curved rod 306, driving the rotating rod 302 and the stirring paddle 303 to rotate and stir the sample. At the same time, the movable kit 308 slides back and forth up and down, causing the impact head 310 to continuously impact the bottom of the mounting tube 214 to generate vibration, causing the sample powder to vibrate in the vertical direction.

[0027] Reference Figure 1 , Figure 3 and Figure 4An arc groove 203 is provided on the base 201, and a movable ring 202 is movably connected in the arc groove 203. A plurality of arc grooves 203 are equidistantly provided on the circumference of the movable ring 202. Sliders 204 are slidably connected in the plurality of arc grooves 203. The tops of the plurality of sliders 204 are fixedly connected to a sliding frame 208. The tops of the plurality of sliding frames 208 are movably connected to support rods 209. The ends of the plurality of support rods 209 away from the sliding frame 208 are movably connected to one side of the mounting tube 214.

[0028] Reference Figure 1 , Figure 3 and Figure 4 The inner wall of the movable ring 202 is fixedly connected with a gear ring 207, and the top of the base 201 is fixedly connected with a driving motor 205, the output end of the driving motor 205 is fixedly connected with a rotating gear 206, the rotating gear 206 and the gear ring 207 are meshed with each other, and the inner wall of the mounting cylinder 214 is fixedly connected with a mortar 216, and a plurality of fine-mesh holes 217 are equidistantly provided on the circumference of the mortar 216.

[0029] Reference Figure 1 , Figure 3 and Figure 4 A mounting frame 219 is fixedly connected to the inner wall of the main box body 1, and a mounting hole and a fixing hole are opened on the mounting frame 219. A rotating shaft 210 is movably connected in the mounting hole, a grinding head 215 is fixedly connected to the bottom of the rotating shaft 210, and a universal motor 212 is fixedly connected in the fixing hole. The top of the rotating shaft 210 and the outer wall of the output end of the universal motor 212 are fixedly connected with a transmission wheel 218, and the outer walls of the two transmission wheels 218 are slidably connected with the same transmission belt 211.

[0030] In a specific application scenario, the drive motor 205 is started to engage and rotate the movable ring 202, forcing the sliding frame 208 to move away from the center, causing the mounting cylinder 214 to slide upward on the inner wall of the fixed cylinder 213 until the mortar 216 contacts the grinding head 215, and the universal motor 212 is started to drive the grinding head 215 to rotate to grind the shale sample.

[0031] Reference Figure 1 , Figure 3 and Figure 7A plurality of fixing kits 408 are fixedly connected to the top of the main box body 1, and springs 409 are fixedly connected to the bottom inner walls of the plurality of fixing kits 408, and two fixing kits 410 are fixedly connected to the bottoms of the two sliding plates 412, and one end of the plurality of springs 409 away from the fixing kits 408 is fixedly connected to the corresponding fixing kits 410, a rotating frame 404 is fixedly connected to one side of the main box body 1, and two sliding grooves are provided at the bottom of the sealing door 401, and movable frames 406 are slidably connected in the two sliding grooves, and the two movable frames 406 are centrally symmetrical, and sealing members 411 are fixedly connected to the outer walls of the opposite sides of the two movable frames 406.

[0032] Reference Figure 1 , Figure 2 and Figure 7 A rotating hole is provided on the sealing door 401, and a rotating shaft 402 is movably connected in the rotating hole. The top of the rotating shaft 402 is connected to a turning handle 403, and the lower end of the rotating shaft 402 is connected to a turning handle rotating gear 2 405, and racks 407 are fixedly connected to the opposite sides of the two movable frames 406, and the two racks 407 are meshed with the rotating gear 2 405.

[0033] Reference Figure 1 and Figure 2 A suction pump 5 is fixedly connected to one side of the main box body 1, and a delivery pipe 6 is fixedly connected to the output end of the suction pump 5, and a brine tank 7 and a collecting tank 10 are fixedly connected to the outer wall of one side of the main box body 1, one end of the delivery pipe 6 away from the suction pump 5 is fixedly connected to the bottom of the brine tank 7, and a connecting pipe 8 is fixedly connected to the top of the brine tank 7, and the end of the connecting pipe 8 away from the brine tank 7 is fixedly connected to the top of the collecting tank 10, and a valve 1 9 is arranged on the connecting pipe 8, and a vacuum pump 11 is arranged on one side of the main box body 1, and an exhaust pipe 12 is fixedly connected to the output end of the vacuum pump 11, and one end of the exhaust pipe 12 away from the vacuum pump 11 is fixedly connected to the top of the main box body 1, and a valve 2 13 is arranged on the exhaust pipe 12.

[0034] In a specific application scenario, the sealing door 401 is closed and pressed downward to cause the compression spring 2 409 to slide downward, and then the turning handle 403 is turned to engage and drive the two movable frames 406 to move toward each other. After the pressing stops, the elasticity of the spring 2 409 allows the seal 411 to fit tightly against the gap to ensure the sealing inside the main box 1.

[0035] A shale gas rapid desorption test method, using a shale gas rapid desorption test device as described above, comprises the following steps: Step 1: After placing the shale sample into the mortar 216, close the sealing door 401 and press it downward to make the compression spring 2 409 slide downward, then turn the handle 403 to engage and drive the two movable frames 406 to move toward each other. After stopping the pressing, the elasticity of the spring 2 409 makes the sealing member 411 close to the gap to ensure the sealing inside the main box 1; Step 2: After the sealing is completed, the vacuum pump 11 is started to suck the air in the main box 1, and the valve 2 13 is closed after completion, and the driving motor 205 is started to engage and rotate the movable ring 202, forcing the sliding frame 208 to move away from the center, driving the mounting cylinder 214 to slide upward on the inner wall of the fixed cylinder 213 until the mortar 216 contacts the grinding head 215, and the universal motor 212 is started to drive the grinding head 215 to rotate, so as to grind the shale sample, and the powder with a suitable particle size falls into the tray 14 from the fine mesh hole 217; Step three, after grinding is completed, the mounting cylinder 214 is reset, and the servo motor 305 is started to rotate the crankshaft 306, driving the rotating rod 302 and the stirring paddle 303 to rotate to stir the sample. At the same time, the movable kit 308 slides back and forth up and down, so that the impact head 310 continuously impacts the bottom of the mounting cylinder 214 to generate vibration. At the same time, the suction pump 5 is started to suck the inside of the main box 1, and the valve 9 is opened to allow the gas to pass through the brine tank 7 and finally enter the collection tank 10.

[0036] Working principle: The sealing door 401 is pushed to be inserted into the rotating frame 404 by the elastic action of the second spring 409, and the sealing door 401 is rotated to open. After the shale sample is placed in the grinding mortar 216, the sealing door 401 is closed and the sealing door 401 is pressed downward at the same time, forcing the sliding plate 412 to compress the second spring 409 and slide downward. Then, the turning handle 403 is turned to rotate the second rotating gear 405, and the meshing drives the two movable frames 406 to move in opposite directions, so that the sealing member 411 moves to the gap between the sealing door 401 and the main box 1. After the pressure on the sealing door 401 stops, the elasticity of the second spring 409 makes the sealing member 411 close to the gap to ensure the sealing inside the main box body 1; after the sealing is completed, the vacuum pump 11 is started to suck the air in the main box body 1, and the valve 2 13 is closed after completion, and the driving motor 205 is started to rotate the rotating gear 1 206, and the rotating movable ring 202 is engaged through the gear ring 207, forcing the sliding member 204 to slide in the corresponding arc groove 203, driving the sliding frame 208 to move away from the center, and pulling the support rod 209. The mounting cylinder 214 is made to slide upward on the inner wall of the fixed cylinder 213 until the mortar 216 contacts the grinding head 215, and the universal motor 212 is started to drive the rotating shaft 210 and the grinding head 215 to rotate through the transmission belt 211, so as to grind the shale sample in the mortar 216, and the powder with a suitable particle size falls into the tray 14 from the fine mesh hole 217; after the grinding is completed, the mounting cylinder 214 is reset, and the servo motor 305 is started to rotate the crankshaft 306, and the bevel gear 1 304 and the bevel gear 2 307 are mutually engaged. They mesh with each other, driving the rotating rod 302 and the stirring paddle 303 to rotate and stir the sample. At the same time, the movable rod 311 moves up and down with the rotation of the curved rod 306, and drives the movable kit 308 to slide back and forth up and down through the connecting rod 312, so that the impact head 310 continuously impacts the bottom of the mounting tube 214 to generate vibration, so that the sample powder vibrates in the vertical direction to avoid particle agglomeration and affect the desorption efficiency. At the same time, the suction pump 5 is started to suck the main box body 1, and the valve 9 is opened to allow the gas to pass through the brine tank 7 and finally enter the collection tank 10.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A shale gas rapid desorption test device, comprising a main box (1), characterized in that: A crushing and screening module (2) is arranged inside the main housing (1), and the crushing and screening module (2) comprises a base (201) and a fixed cylinder (213), the base (201) and the fixed cylinder (213) are fixedly connected to the bottom inner wall of the main housing (1), the inner wall of the fixed cylinder (213) is slidably connected to a mounting cylinder (214), an acceleration module (3) is arranged on the mounting cylinder (214), the bottom inner wall of the mounting cylinder (214) is fixedly connected to a tray (14), the acceleration module (3) comprises a rotating rod (302), the rotating rod (302) ) is rotatably connected to the bottom of the mounting cylinder (214) through a bearing, and the top of the rotating rod (302) is fixedly connected to a stirring paddle (303), and the bottom of the rotating rod (302) is fixedly connected to a bevel gear 1 (304). A sealing module (4) is arranged on the top of the main housing (1), and the sealing module (4) includes two sliding plates (412). Two sliding grooves are provided on the top of the main housing (1), and the two sliding plates (412) both slide in the corresponding sliding grooves, and the tops of the two sliding plates (412) are provided with the same sealing door (401).

2. A shale gas rapid desorption test device according to claim 1, characterized in that: The inner wall of the mounting tube (214) is fixedly connected to a ring frame (301), a plurality of movable sets (308) are slidably connected to the sliding frame (208), the bottom inner walls of the plurality of movable sets (308) are fixedly connected to a spring 1 (309), and the inner walls of the plurality of movable sets (308) are slidably connected to an impact head (310), the plurality of impact heads (310) are fixedly connected to the corresponding spring 1 (309), and a connecting rod (312) is fixedly connected between two movable sets (308) located on the same side.

3. A shale gas rapid desorption test device according to claim 2, characterized in that: A servo motor (305) is fixedly connected to the inner wall of one side of the mounting cylinder (214); the output end of the servo motor (305) is connected to a crankshaft (306) via a coupling; the outer wall of the crankshaft (306) is rotatably connected to two movable rods (311) via a bearing; one end of the two movable rods (311) away from the crankshaft (306) is movably connected to a corresponding connecting rod (312); and the outer wall of the crankshaft (306) is fixedly connected to a second bevel gear (307); the second bevel gear (307) and the first bevel gear (304) are meshed with each other.

4. A shale gas rapid desorption test device according to claim 3, characterized in that: The base (201) is provided with an arc groove (203), and a movable ring (202) is movably connected in the arc groove (203), a plurality of arc grooves (203) are equidistantly provided on the circumference of the movable ring (202), a sliding member (204) is slidably connected in the plurality of arc grooves (203), a sliding frame (208) is fixedly connected at the top of the plurality of sliding members (204), a support rod (209) is movably connected at the top of the plurality of sliding frames (208), and one end of the plurality of support rods (209) away from the sliding frame (208) is movably connected to one side of the mounting tube (214).

5. A shale gas rapid desorption test device according to claim 4, characterized in that: The inner wall of the movable ring (202) is fixedly connected to a gear ring (207), and the top of the base (201) is fixedly connected to a driving motor (205), the output end of the driving motor (205) is fixedly connected to a rotating gear one (206), the rotating gear one (206) and the gear ring (207) are meshed with each other, and the inner wall of the mounting cylinder (214) is fixedly connected to a grinding mortar (216), and a plurality of fine-mesh holes (217) are equidistantly provided on the circumference of the grinding mortar (216).

6. A shale gas rapid desorption test device according to claim 5, characterized in that: The inner wall of the main box (1) is fixedly connected to a mounting frame (219), the mounting frame (219) is provided with a mounting hole and a fixing hole, a rotating shaft (210) is rotatably connected in the mounting hole via a bearing, a grinding head (215) is fixedly connected to the bottom of the rotating shaft (210), and a universal motor (212) is fixedly connected in the fixing hole, a top end of the rotating shaft (210) and an outer wall of an output end of the universal motor (212) are both fixedly connected to transmission wheels (218), and the outer walls of the two transmission wheels (218) are slidably connected to the same transmission belt (211).

7. A shale gas rapid desorption test device according to claim 6, characterized in that: The top of the main box body (1) is fixedly connected to a plurality of fixed kits (408), the bottom inner walls of the plurality of fixed kits (408) are fixedly connected to springs (409), and the bottoms of the two sliding plates (412) are fixedly connected to two fixed kits (410), and the ends of the plurality of springs (409) away from the fixed kits (408) are fixedly connected to the corresponding fixed kits (410), one side of the main box body (1) is fixedly connected to a rotating frame (404), the bottom of the sealing door (401) is provided with two sliding grooves, and movable frames (406) are slidably connected in the two sliding grooves, the two movable frames (406) are centrally symmetrical, and the outer walls of the two movable frames (406) on the opposite sides are fixedly connected to sealing members (411).

8. A shale gas rapid desorption test device according to claim 7, characterized in that: The sealing door (401) is provided with a rotating hole, in which a rotating shaft (402) is rotatably connected via a bearing, the top end of the rotating shaft (402) is connected to a turning handle (403), the bottom end of the rotating shaft (402) is connected to a turning handle rotating gear 2 (405), and racks (407) are fixedly connected to opposite sides of the two movable frames (406), and the two racks (407) are meshed with the rotating gear 2 (405).

9. A shale gas rapid desorption test device according to claim 8, characterized in that: A suction pump (5) is fixedly connected to one side of the main box (1), and a delivery pipe (6) is fixedly connected to the output end of the suction pump (5); a salt water tank (7) and a collection tank (10) are fixedly connected to the outer wall of one side of the main box (1); an end of the delivery pipe (6) away from the suction pump (5) is fixedly connected to the bottom of the salt water tank (7); a connecting pipe (8) is fixedly connected to the top of the salt water tank (7); an end of the connecting pipe (8) away from the salt water tank (7) is fixedly connected to the top of the collection tank (10); a valve 1 (9) is provided on the connecting pipe (8); a vacuum pump (11) is provided on one side of the main box (1); an exhaust pipe (12) is fixedly connected to the output end of the vacuum pump (11); an end of the exhaust pipe (12) away from the vacuum pump (11) is fixedly connected to the top of the main box (1); and a valve 2 (13) is provided on the exhaust pipe (12).

10. A shale gas rapid desorption test method, using a shale gas rapid desorption test device as claimed in claim 9, characterized in that: The steps include: Step 1: After placing the shale sample into the mortar (216), close the sealing door (401) and press downward to compress the second spring (409) to slide downward, then turn the handle (403) to move the two movable frames (406) toward each other. When the pressure stops, the elasticity of the second spring (409) causes the sealing member (411) to fit tightly against the gap, thereby ensuring the sealing inside the main box (1); Step 2: After the sealing is completed, the vacuum pump (11) is started to suck the air in the main box (1). After completion, the valve 2 (13) is closed, and the driving motor (205) is started to engage and rotate the movable ring (202), forcing the sliding frame (208) to move away from the center, so that the mounting cylinder (214) slides upward on the inner wall of the fixed cylinder (213) until the grinding mortar (216) contacts the grinding head (215), and the universal motor (212) is started to drive the grinding head (215) to grind the shale sample, and the powder of suitable particle size falls into the tray (14) from the fine mesh hole (217); Step 3: After the grinding is completed, the mounting tube (214) is reset, and the servo motor (305) is started to rotate the crankshaft (306), driving the rotating rod (302) and the stirring paddle (303) to rotate, thereby stirring the sample. At the same time, the movable kit (308) slides up and down, causing the impact head (310) to continuously impact the bottom of the mounting tube (214) to generate vibration. At the same time, the suction pump (5) is started to suck the inside of the main box (1), and the valve one (9) is opened to allow the gas to pass through the brine tank (7) and finally enter the collection tank (10).

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