A production device and method based on polymer dry powder mixing fracturing fluid

Abstract

The present invention discloses a production device and method for fracturing fluid based on polymer dry powder mixing, which relates to the technical field of fracturing fluid preparation. The device comprises a bracket, wherein the bracket is fixedly connected to a filler shell and a connecting water pipe, one end of the connecting water pipe is located in the filler shell, and the two form an annular gap, the external rotation of the connecting water pipe is connected to a rotating sleeve, the rotating sleeve is fixedly connected to circumferentially distributed support scrapers, the circumferentially distributed support scrapers are located in the annular gap, and the bracket is provided with a driving assembly. The present invention uses the annular gap to pre-mix the dry powder with the high-pressure water flow ejected from the connecting water pipe in a circumferential direction, and on this basis, a number of support scrapers are rotated in the annular gap to push the dry powder in the annular gap to move, thereby reducing the probability of local accumulation of the dry powder in the annular gap and improving the uniformity of the circumferential mixing of the dry powder by the water flow.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing fluid preparation, and in particular to a production device and method for fracturing fluid based on polymer dry powder mixing. Background Art

[0002] Fracturing fluid is a key working fluid used in oil and gas production for fracturing and reforming. Its primary function is to effectively transmit the pressure generated by surface high-pressure equipment to the underground rock formation, causing the rock to fracture and expand the cracks. Furthermore, it is responsible for carrying support material into the cracks, ensuring that the cracks remain open after the pressure is released, thereby reducing fluid flow resistance and improving oil and gas production and injection efficiency. Existing fracturing fluid formulation methods use the Venturi negative pressure generated by the rapid flow of water to mix with dry powder. To increase the mixing area between the two, a material shell is wrapped around the water pipe to form an annular gap, thereby achieving circumferential mixing of dry powder and water. However, when the dry powder passes through the annular powder channel, due to the strong attraction between the dry powder particles and the friction resistance between the dry powder particles and the inner wall of the channel, some dry powder easily adheres to the inner wall of the channel, forming a wall hanging phenomenon. This phenomenon prevents the adhered dry powder from moving smoothly downward and, therefore, from fully contacting and mixing with the water flow below. As a result, not only the actual contact area between the dry powder and water is reduced, but also the mixing uniformity is significantly reduced, ultimately affecting the overall quality of the fracturing fluid and process efficiency. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a production device and method based on mixing polymer dry powder with fracturing fluid.

[0004] The technical implementation scheme of the present invention is: a production device based on polymer dry powder mixing fracturing fluid, including a bracket, the bracket is fixedly connected to a filler shell and a connecting water pipe, one end of the connecting water pipe is located in the filler shell, and the two form an annular gap, the bracket is fixedly connected to a shear emulsification pump and a delivery pump, the other end of the connecting water pipe is connected to the delivery pump, the bottom of the filler shell is connected to the shear emulsification pump, the external rotation of the connecting water pipe is connected to a rotating sleeve, the rotating sleeve is fixedly connected to circumferentially distributed support scrapers, the circumferentially distributed support scrapers are located in the annular gap, the bracket is provided with a drive component for driving the rotating sleeve to rotate, and the bracket is provided with a control component for controlling the discharge of the filler shell.

[0005] It is further explained that the central axis of the rotating sleeve is not located in the vertical plane where the vertical side surface of the supporting scraper is located, and is used to guide the blocky dry powder in the annular gap to the inner wall of the filler shell.

[0006] It is further explained that the supporting scraper is rotatably connected to a rolling roller, and the rolling roller is in contact with the filler shell and is used to roll the block dry powder in the annular gap.

[0007] Further description, the control component includes an electric push rod, which is fixedly connected to the bracket, and the telescopic end of the electric push rod is fixedly connected to a sealing ring, which is slidably and rotatably connected to the rotating sleeve, and the sealing ring is used to seal the filler shell.

[0008] Further description, it also includes a detection component for detecting high-pressure water backflow, the detection component is arranged on the filler shell, the detection component includes a detection tube, the detection tube is fixedly connected and connected to the filler shell, the connection between the detection tube and the filler shell is located below the connecting water pipe, a pressure sensor is arranged in the detection tube, and a sealing component for protecting the pressure sensor is arranged in the detection tube.

[0009] It is further explained that the connection point between the detection tube and the filler shell is located at the bottom of the detection tube.

[0010] It is further explained that the sealing assembly includes a docking ring, which is fixedly connected to the detection tube. The detection tube is slidably connected to a sealing piston, and the sealing piston is used to fit with the docking ring to seal the detection tube.

[0011] It is further explained that the blocking piston is fixedly connected to a float, and the float is used to push the blocking piston to fit the docking ring.

[0012] It is further explained that the blocking piston and the float are both located on a side of the docking ring close to the filler shell.

[0013] A method for producing a fracturing fluid based on a polymer dry powder mixture, using the above-mentioned production device for a fracturing fluid based on a polymer dry powder mixture, comprises the following steps:

[0014] Step 1: During mixing, start the shear emulsification pump and the delivery pump to form a negative pressure at the outlet of the connecting water pipe, and control the telescopic end of the electric push rod to drive the sealing ring to release the blockage of the filler shell, so that the dry powder in the filler shell enters the annular gap;

[0015] Step 2: After opening the sealing ring to release the seal on the filler shell, start the drive assembly to rotate the rotating sleeve, and drive the supporting scraper to rotate, so that the dry powder in the annular gap moves in a circumferential direction when falling;

[0016] Step 3: The rotating support scraper pushes the bulk dry powder in the annular gap to the outside and is squeezed and crushed by the rolling roller. The dry powder in the annular gap is then mixed with water in a circumferential direction and finally enters the shear emulsification pump for emulsification to form the finished product.

[0017] Step 4: During the pre-mixing of dry powder and water, the pressure sensor detects whether there is backflow at the outlet of the connected water pipe. If backflow occurs, the telescopic end of the electric push rod is controlled to drive the sealing ring to seal the filler shell, and the float drives the sealing piston to fit the docking ring to seal the detection tube;

[0018] Step 5: After the backflow phenomenon disappears, the telescopic end of the electric push rod drives the sealing ring to release the blockage of the stuffing shell, and the float drives the sealing piston to separate from the docking ring. The detection tube is opened. If the backflow phenomenon does not disappear, the machine is shut down for maintenance.

[0019] The beneficial effects of the present invention are as follows: 1. The present invention causes the dry powder to be pre-mixed circumferentially with the high-pressure water flow ejected from the communicating water pipe through the annular gap. On this basis, a plurality of supporting scrapers rotate in the annular gap to push the dry powder in the annular gap to move, thereby reducing the probability of local accumulation of the dry powder in the annular gap and improving the uniformity of the circumferential mixing of the dry powder by the water flow;

[0020] 2. The support scraper pushes the bulk dry powder along its outer surface toward the inner wall of the filler shell, and the rolling roller on the support scraper moves in contact with the inner wall of the filler shell to crush the bulk dry powder accumulated on the inner wall of the filler shell, thereby reducing the probability of dry powder accumulation in the annular gap;

[0021] 3. By installing a pressure sensor at the mixing point of high-pressure water and dry powder to detect the backflow situation, and timely operating the sealing ring to seal the filler shell, the backflow water is blocked in the annular gap to ensure the dryness of the dry powder and the normal preparation of the fracturing fluid;

[0022] 4. After the backflow water enters the detection tube, the float uses the liquid level rise of the backflow water to drive the sealing piston to fit with the docking ring, thereby sealing the detection tube and isolating the backflow water and the dry powder in the backflow water, so that the backflow water and the dry powder in it do not come into contact with the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 Schematic diagram of the three-dimensional cross-sectional structure of the filler shell of the present invention;

[0025] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of the rotating sleeve of the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating sleeve and the supporting scraper of the present invention;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the supporting scraper and the rolling roller of the present invention;

[0028] Figure 6 It is a schematic cross-sectional view of the three-dimensional structure of the detection tube of the present invention.

[0029] In the above figures: 1: bracket, 2: filler shell, 3: connecting water pipe, 4: annular gap, 5: shear emulsification pump, 6: delivery pump, 7: rotating sleeve, 8: support scraper, 9: rolling roller, 201: electric push rod, 202: sealing ring, 301: detection tube, 302: pressure sensor, 303: docking ring, 304: sealing piston, 305: float. DETAILED DESCRIPTION

[0030] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and will fully convey the scope of the invention to those skilled in the art.

[0031] The existing method of preparing fracturing fluid mainly relies on the negative pressure formed by the Venturi effect generated by the high-speed flow of water to suck in and mix the dry powder with it. In order to further increase the mixing area, a structure is usually adopted in which the material shell is wrapped around the water pipe to form an annular gap, so that the dry powder is in contact and mixed with the water flow in the circumferential space. However, when the dry powder passes through the annular channel, due to the strong cohesive force between the particles and the friction between the particles and the pipe wall, some of the dry powder tends to adhere to the inner wall of the channel, forming a "hanging on the wall" phenomenon. This phenomenon prevents the dry powder from falling smoothly and is difficult to fully contact and mix with the water flow below. It not only reduces the effective contact area between the dry powder and water, but also significantly reduces the mixing uniformity, ultimately affecting the quality of the fracturing fluid and construction efficiency. Example 1

[0032] This embodiment discloses a production device based on mixing polymer dry powder with fracturing fluid, which is used to prepare fracturing fluid.

[0033] like Figure 1-Figure 5As shown, it includes a bracket 1, and the left and right sides of the bracket 1 are respectively fixedly connected with a filler shell 2 and a connecting water pipe 3, the filler shell 2 consists of a conical filler part and a cylindrical mixing part, the left end of the connecting water pipe 3 is located in the filler shell 2, and the cylindrical mixing part of the filler shell 2 has a diameter change at the outlet of the connecting water pipe 3. A vibration component (not shown in the figure) for auxiliary feeding can also be provided in the filler shell 2, such as a vibrating rod, and the two form an annular gap 4, the central axis of the filler shell 2 coincides with the central axis of the outlet of the connecting water pipe 3, the left and right sides of the bracket 1 are respectively fixedly connected with a shear emulsification pump 5 and a delivery pump 6, the right end of the connecting water pipe 3 is connected to the delivery pump 6, the bottom of the filler shell 2 is connected to the shear emulsification pump 5, and the outlet of the connecting water pipe 3 is externally rotatably connected with a rotating sleeve 7, and the central axis of the rotating sleeve 7 is aligned with the central axis of the filler shell 2. The central axis coincides, and a number of supporting scrapers 8 distributed at equal intervals in the circumferential direction are fixedly connected to the rotating sleeve 7. The supporting scrapers 8 are provided with evenly distributed through grooves to allow fine dry powder to pass through and block block dry powder. The supporting scrapers 8 distributed at equal intervals in the circumferential direction are located in the annular gap 4. The bracket 1 is provided with a driving assembly for driving the rotating sleeve 7 to rotate. The driving assembly includes a servo motor and two gears. The servo motor is fixedly connected to the bracket 1, and the output shaft of the servo motor is fixedly connected to one of the gears, and the other gear is fixedly connected to the top of the rotating sleeve 7. The two gears are engaged, and are used to make the rotating sleeve 7 drive the number of supporting scrapers 8 to rotate clockwise in the annular gap 4, so that the dry powder in the annular gap 4 is in motion, reducing the occurrence of dry powder hanging on the wall. The bracket 1 is provided with a control assembly for controlling the discharge of the filler shell 2.

[0034] like Figure 2 、 Figure 4 and Figure 5 As shown, the central axis of the rotating sleeve 7 is not in the vertical plane where the vertical side surface of the supporting scraper 8 is located, that is, the supporting scraper 8 is tilted on the rotating sleeve 7, and the tilt direction of the supporting scraper 8 is opposite to the rotation direction of the rotating sleeve 7, which is used to guide the block dry powder in the annular gap 4 to the inner wall of the filler shell 2. The supporting scraper 8 is rotated away from the side of the rotating sleeve 7 and is connected to the rolling roller 9. The rolling roller 9 is in contact with the filler shell 2, and the rolling roller 9 follows the support scraper 8 to move, and is used to roll the block dry powder on the inner wall of the filler shell 2, reduce the content of the block dry powder in the annular gap 4, and improve To ensure the quality of fracturing fluid preparation, the control component includes an electric push rod 201, which is fixedly connected to the bracket 1. The telescopic end of the electric push rod 201 is fixedly connected to a sealing ring 202. The sealing ring 202 is slidably and rotatably connected to the rotating sleeve 7. In the initial state, the sealing ring 202 is located between the conical filling part of the filling shell 2 and the cylindrical mixing part, sealing the conical filling part of the filling shell 2. When fracturing fluid needs to be prepared, the telescopic end of the electric push rod 201 is used to control the sealing ring 202 to move upward, so that the dry powder in the conical filling part of the filling shell 2 can enter the annular gap 4.

[0035] Working principle: When fracturing fluid needs to be mixed, the staff pours dry powder into the conical packing part of the packing shell 2. At this time, the sealing ring 202 is in a blocking state on the packing shell 2. Then the delivery pump 6 and the shear emulsification pump 5 are turned on to deliver high-pressure water into the connecting water pipe 3. The high-pressure water flows along the connecting water pipe 3 and finally enters the packing shell 2. It flows along the packing shell 2 into the shear emulsification pump 5 and is finally discharged along the shear emulsification pump 5. In this process, the high-pressure water flows rapidly into the packing shell 2, forming a negative pressure (Venturi principle, which will not be elaborated on here). At the same time, the electric push rod 201 is turned on, so that the telescopic end of the electric push rod 201 drives the sealing ring 202 to move upward along the rotating sleeve 7, thereby releasing the blockage of the filler shell 2. At this time, the dry powder in the filler shell 2 begins to enter the annular gap 4 under the action of negative pressure and gravity, and continues to move downward along the annular gap 4 to the bottom of the connecting water pipe 3, so that the dry powder is circumferentially pre-mixed with the high-pressure water flow ejected from the connecting water pipe 3, thereby increasing the contact area between the dry powder and the water flow. The dry powder then follows the high-pressure water flow into the shear emulsification pump 5 for mixing and emulsification to prepare the fracturing fluid, which is finally discharged to the outside.

[0036] During the mixing process of the above-mentioned fracturing fluid, the driving assembly is turned on, and the rotating sleeve 7 drives the circumferentially distributed supporting scrapers 8 to start rotating clockwise, so that the supporting scrapers 8 stir the dry powder in the annular gap 4, reducing the probability of local accumulation of dry powder in the annular gap 4, ensuring that the negative pressure formed by the high-pressure water can evenly mix the dry powder in the circumferential direction, and improving the preparation quality of the fracturing fluid. On this basis, the dry powder may form lumps of dry powder due to moisture. When the lumps of dry powder enter the annular gap 4, the probability of the dry powder in the annular gap 4 being stuck will increase, and the supporting scrapers 8 will stir the dry powder in the annular gap 4. During the rotation, the scraper 8 will intercept the block dry powder in the annular gap 4, and as the supporting scraper 8 rotates, the block dry powder will be pushed along its outer side to the outer side of the annular gap 4, so that the block dry powder will accumulate on the inner wall of the filler shell 2. During the rotation of the supporting scraper 8, the rolling roller 9 on it will be driven to rotate synchronously. The rolling roller 9 moves in accordance with the inner wall of the filler shell 2, and the block dry powder accumulated on the inner wall of the filler shell 2 is crushed, further reducing the probability of the dry powder in the annular gap 4 being stuck, and further stabilizing the state of the high-pressure water uniformly mixing the dry powder circumferentially.

[0037] When the fracturing fluid is prepared, the shear emulsification pump 5 and the delivery pump 6 are turned off, and the electric push rod 201 is turned on. The telescopic end of the electric push rod 201 drives the sealing ring 202 to move downward and reset to the initial state. The sealing ring 202 forms a seal on the filler shell 2. When the fracturing fluid needs to be prepared again, repeat the above steps. Example 2

[0038] This embodiment discloses a production device based on polymer dry powder mixed with fracturing fluid, which is further improved on the basis of Example 1.

[0039] like Figure 2 、 Figure 3 and Figure 6 As shown, a detection component for detecting high-pressure water backflow is also included. The detection component is arranged on the filler shell 2. The detection component includes a detection tube 301. The detection tube 301 is fixedly connected and communicated with the filler shell 2. The connection between the detection tube 301 and the filler shell 2 is located below the connecting water pipe 3. A pressure sensor 302 is provided on the top of the detection tube 301. By connecting the detection tube 301 with the filler shell 2, the negative pressure state at the outlet of the connecting water pipe 3 is detected, and then whether the water in the connecting water pipe has a backflow phenomenon is detected. A blocking component for protecting the pressure sensor 302 is provided in the detection tube 301. The connection between the detection tube 301 and the filler shell 2 is located at the bottom of the detection tube 301, so that the backflow water in the filler shell 2 will not directly contact the pressure sensor 302 after entering the detection tube 301, but will gradually rise in the detection tube 301.

[0040] like Figure 6 As shown, the blocking assembly includes a docking ring 303, which is fixedly connected to the detection tube 301. The detection tube 301 is slidably connected to a blocking piston 304. The inner diameter of the docking ring 303 is smaller than the maximum diameter of the blocking piston 304, so that the blocking piston 304 is used to fit the docking ring 303 to block the detection tube 301. The bottom of the blocking piston 304 is fixedly connected to a float 305. The material of the float 305 is high-density polyethylene, which has high strength and good wear resistance. It has a long service life. The float 305 is used to push the sealing piston 304 to fit the docking ring 303. The sealing piston 304 and the float 305 are both located on the side of the docking ring 303 close to the filler shell 2. After the backflow water enters the detection tube 301, the float 305 uses the backflow water to drive the sealing piston 304 to fit the docking ring 303, thereby sealing the detection tube 301, isolating the backflow water and the dry powder in the backflow water, and preventing the backflow water and the dry powder therein from contacting the pressure sensor 302.

[0041] Working principle: During the fracturing fluid preparation process, the delivery speed of the delivery pump 6 may be greater than the delivery speed of the shear emulsification pump 5. High-pressure water accumulates in the filler shell 2 and flows back upward along the annular gap 4, causing the dry powder in the filler shell 2 to be soaked in advance and unable to be emulsified. The above problem is mainly caused by two situations. One is that the circuit voltage of the delivery pump 6 and the shear emulsification pump 5 fluctuates, and the above situation will occur briefly and recover immediately. The other is that the impeller of the shear emulsification pump 5 breaks due to cavitation after long-term use, and the above situation continues to occur and cannot recover by itself.

[0042] When the above problem occurs, first, high-pressure water accumulates in the filler shell 2, and the connecting water pipe 3 cannot form negative pressure. At this time, the pressure sensor 302 will feel the pressure change and send an electrical signal to the electric push rod 201. After the electric push rod 201 receives the electrical signal, the telescopic end of the electric push rod 201 quickly drives the sealing ring 202 to move downward, sealing the filler shell 2 and sealing the backflow water in the annular gap 4, ensuring the drying of the dry powder and the normal preparation of the fracturing fluid. At the same time, the water in the connecting water pipe 3 will enter the detection tube 301, and the water will gradually The float 305 is pushed by the water flow and drives the blocking piston 304 to move along the detection tube 301 until the blocking piston 304 fits with the docking ring 303, thereby making the blocking piston 304 block the detection tube 301, preventing the water in the filler shell 2 from carrying dry powder into the detection tube 301 and adhering to the outside of the pressure sensor 302, thereby affecting the detection accuracy of the pressure sensor 302.

[0043] When the first situation mentioned above occurs, the water in the detection tube 301 will flow back into the filler shell 2 in a short time, and the high-pressure water will continue to form a negative pressure at the bottom of the connecting water pipe 3. At this time, the float 305 is not affected by the buoyancy of the water, and pulls the sealing piston 304 to separate from the docking ring 303, releasing the blockage of the detection tube 301, allowing the pressure sensor 302 to continue to detect the backflow situation, and controls the telescopic end of the electric push rod 201 to drive the sealing ring 202 to move upward, releasing the blockage of the sealing ring 202 on the filler shell 2, and repeating the above steps when the above problem occurs again; when the second situation mentioned above occurs, the pressure detected by the pressure sensor 302 within a specific time cannot return to the normal value (that is, the value detected when the high-pressure water forms a negative pressure), and the pressure sensor 302 sends a signal to the shear emulsification pump 5 and the delivery pump 6. After receiving the signal, the shear emulsification pump 5 and the delivery pump 6 automatically shut down, stop preparing the fracturing fluid, and wait for the staff to perform maintenance. Example 3

[0044] This embodiment discloses a method for producing a fracturing fluid based on a polymer dry powder mixture, and uses the above-mentioned production device for a fracturing fluid based on a polymer dry powder mixture, such as Figures 1-6 As shown, the following steps are included:

[0045] Step 1: During mixing, the shear emulsification pump 5 and the delivery pump 6 are turned on to form a negative pressure at the outlet of the connecting water pipe 3, and the telescopic end of the electric push rod 201 is controlled to drive the sealing ring 202 to release the blockage of the filler shell 2, so that the dry powder in the filler shell 2 enters the annular gap 4;

[0046] Step 2: After opening the sealing ring 202 to release the seal on the filler shell 2, the driving assembly is turned on to rotate the rotating sleeve 7, which in turn drives the supporting scraper 8 to rotate, causing the dry powder in the annular gap 4 to move circumferentially as it falls;

[0047] Step 3: The rotating support scraper 8 pushes the bulk dry powder in the annular gap 4 to the outside and is squeezed and crushed by the rolling roller 9. The dry powder in the annular gap 4 is then circumferentially mixed with water and finally enters the shear emulsification pump 5 for emulsification to form a finished product.

[0048] Step 4: During the pre-mixing of the dry powder and water, the pressure sensor 302 detects whether there is backflow at the outlet of the connecting water pipe 3. If backflow occurs, the sealing ring 202 is driven to seal the filling shell 2 by controlling the telescopic end of the electric push rod 201. The float 305 drives the sealing piston 304 to fit the docking ring 303, thereby sealing the detection tube 301.

[0049] Step 5: After the backflow phenomenon disappears, the telescopic end of the electric push rod 201 drives the sealing ring 202 to release the blockage of the filler shell 2, and the float 305 drives the sealing piston 304 to separate from the docking ring 303, and the detection tube 301 is opened. If the backflow phenomenon does not disappear, the machine is shut down for maintenance.

[0050] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A production device based on polymer dry powder mixed fracturing fluid, comprising a bracket (1), wherein the bracket (1) is fixedly connected to a filler shell (2) and a connecting water pipe (3), one end of the connecting water pipe (3) is located in the filler shell (2), and the two form an annular gap (4), the bracket (1) is fixedly connected to a shear emulsification pump (5) and a delivery pump (6), the other end of the connecting water pipe (3) is connected to the delivery pump (6), and the bottom of the filler shell (2) is connected to the shear emulsification pump (5), characterized in that: The external portion of the communicating water pipe (3) is rotatably connected to a rotating sleeve (7), and the rotating sleeve (7) is fixedly connected to circumferentially distributed supporting scrapers (8), and the circumferentially distributed supporting scrapers (8) are located in the annular gap (4). The bracket (1) is provided with a driving component for driving the rotating sleeve (7) to rotate, and the bracket (1) is provided with a control component for controlling the discharge of the filler shell (2); The control assembly comprises an electric push rod (201), the electric push rod (201) is fixedly connected to the bracket (1), the telescopic end of the electric push rod (201) is fixedly connected to a blocking ring (202), the blocking ring (202) is slidably and rotationally connected to the rotating sleeve (7), and the blocking ring (202) is used to block the filler shell (2); The device further comprises a detection assembly for detecting high-pressure water backflow, the detection assembly being arranged on the filler shell (2), the detection assembly comprising a detection tube (301), the detection tube (301) being fixedly connected to and communicating with the filler shell (2), the connection point between the detection tube (301) and the filler shell (2) being located below the communicating water pipe (3), the detection tube (301) being provided with a pressure sensor (302), and the detection tube (301) being provided with a blocking assembly for protecting the pressure sensor (302); The blocking assembly comprises a docking ring (303), the docking ring (303) is fixedly connected to the detection tube (301), the detection tube (301) is slidably connected to a blocking piston (304), and the blocking piston (304) is used to fit with the docking ring (303) to block the detection tube (301); The blocking piston (304) is fixedly connected to a float (305), and the float (305) is used to push the blocking piston (304) to fit the docking ring (303).

2. The production device based on polymer dry powder mixed fracturing fluid according to claim 1, characterized in that: The central axis of the rotating sleeve (7) is not located in the vertical plane where the vertical side surface of the supporting scraper (8) is located, and is used to guide the blocky dry powder in the annular gap (4) to the inner wall of the filler shell (2).

3. The production device based on polymer dry powder mixed fracturing fluid according to claim 2, characterized in that: The supporting scraper (8) is rotatably connected to a rolling roller (9), and the rolling roller (9) is in contact with the filler shell (2) and is used to roll the block dry powder in the annular gap (4).

4. The production device based on polymer dry powder mixed fracturing fluid according to claim 3, characterized in that: The connection point between the detection tube (301) and the filler shell (2) is located at the bottom of the detection tube (301).

5. The production device based on polymer dry powder mixed fracturing fluid according to claim 4, characterized in that: The blocking piston (304) and the float (305) are both located on a side of the docking ring (303) close to the filler shell (2).

6. A method for producing a fracturing fluid based on a polymer dry powder mixture, using the production device for a fracturing fluid based on a polymer dry powder mixture according to claim 5, characterized in that: The following steps are involved: Step 1: During mixing, the shear emulsification pump (5) and the delivery pump (6) are turned on to form a negative pressure at the outlet of the connecting water pipe (3), and the telescopic end of the electric push rod (201) is controlled to drive the sealing ring (202) to release the blockage of the filler shell (2), so that the dry powder in the filler shell (2) enters the annular gap (4); Step 2: After opening the sealing ring (202) to release the seal on the filler shell (2), the driving assembly is turned on to rotate the rotating sleeve (7), and the supporting scraper (8) is driven to rotate, so that the dry powder in the annular gap (4) moves in a circumferential direction when falling; Step 3: The rotating support scraper (8) pushes the bulk dry powder in the annular gap (4) to the outside, and the bulk dry powder is squeezed and crushed by the rolling roller (9). Then, the dry powder in the annular gap (4) is circumferentially mixed with water, and finally enters the shear emulsification pump (5) for emulsification to form a finished product; Step 4: During the pre-mixing of the dry powder and water, the pressure sensor (302) detects whether there is a backflow phenomenon at the outlet of the connecting water pipe (3). When the backflow phenomenon exists, the sealing ring (202) is driven to seal the filling shell (2) by controlling the telescopic end of the electric push rod (201), and the float (305) drives the sealing piston (304) to fit the docking ring (303), thereby sealing the detection tube (301); Step 5: After the backflow phenomenon disappears, the telescopic end of the electric push rod (201) drives the blocking ring (202) to release the blockage of the filler shell (2), and the float (305) drives the blocking piston (304) to separate from the docking ring (303), and the detection tube (301) is opened. If the backflow phenomenon does not disappear, the machine is shut down for maintenance.

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