On-line preparation skid-mounted equipment for fracturing dry powder and use method

Abstract

The invention belongs to the technical field of fracturing dry powder preparation equipment, and particularly relates to fracturing dry powder online preparation skid-mounted equipment which comprises a container, a preparation mechanism is arranged on the container, and a feeding mechanism and a water supply mechanism corresponding to the feeding mechanism are connected to the preparation mechanism; the preparation mechanism comprises a buffer tank, and the buffer tank is connected with a solid-liquid jet device connected with the feeding mechanism and the water supply mechanism; the solid-liquid jet device comprises a reducing section, a throat pipe and a flaring section which are connected in sequence, the flaring section is communicated with the buffer tank, the reducing section is detachably connected with a dry powder pipe corresponding to the flaring section, the dry powder pipe is connected with the feeding mechanism, and the reducing section is provided with a water pipe connected with the water supply mechanism; the dry powder pipe is connected with a material distribution pipe, one end of the material distribution pipe is connected with a main pipe corresponding to the throat pipe, the material distribution pipe is further connected with a plurality of branch pipes which are uniformly distributed along the circumference and correspond to the dry powder pipe, and the axes of the branch pipes and the axis of the main pipe are linearly arranged in different planes; the invention effectively solves the problem that the traditional equipment is difficult to meet the requirements of large displacement and continuous liquid supply.

Description

Technical Field

[0001] The present invention belongs to the technical field of fracturing dry powder preparation equipment, and particularly relates to an on-line fracturing dry powder preparation skid-mounted equipment and a using method thereof. Background Art

[0002] Fracturing dry powder preparation plays a crucial role in the exploitation of unconventional oil and gas reservoirs such as shale gas and shale oil, as well as some low-permeability conventional oil and gas reservoirs. Its core function is: by dissolving polymer dry powder in water, a basic fracturing fluid (base fluid) with the required viscosity is prepared. This base fluid is the basis for subsequent addition of crosslinking agents, gel-breaking agents, etc. to form the final fracturing fluid system. It endows the fracturing fluid with key functions such as sand carrying, filtration loss reduction, and pressure transmission, and is an indispensable first step to achieve effective hydraulic fracturing and create a fracture channel with high conductivity.

[0003] However, when the existing fracturing dry powder preparation equipment prepares dry powder, there are the following technical problems: 1. Traditional equipment usually adopts batch mixing. It is necessary to manually weigh and add dry powder in batches, and then transfer it to a storage tank or downstream equipment after mixing and stirring. This process is time-consuming and difficult to meet the harsh requirements of large-scale fracturing operations for large displacement and continuous liquid supply. 2. In addition, traditional solid-liquid ejectors mix dry powder and water flow through the Venturi tube principle, but conventional simple primary injection mixing cannot achieve a uniform and sufficient mixing effect, which affects the mixing effect of dry powder. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides an on-line fracturing dry powder preparation skid-mounted equipment and a using method thereof, effectively solving the problem that traditional equipment is difficult to meet the requirements of large displacement and continuous liquid supply.

[0005] To achieve the above object, the present invention adopts the following technical solutions: An on-line fracturing dry powder preparation skid-mounted equipment, including a container, on which a preparation mechanism is provided, and a feeding mechanism and a water supply mechanism corresponding to the feeding mechanism are connected to the preparation mechanism; the preparation mechanism includes a buffer tank, and a solid-liquid ejector connected to the feeding mechanism and the water supply mechanism is connected to the buffer tank; the solid-liquid ejector includes a gradually reducing section, a throat section, and a flaring section connected in sequence, the flaring section is communicated with the buffer tank, a dry powder pipe corresponding to the flaring section is detachably connected to the gradually reducing section, the dry powder pipe is connected to the feeding mechanism, and a water pipe connected to the water supply mechanism is provided on the gradually reducing section; the dry powder pipe is connected with a distributing pipe, one end of the distributing pipe is connected with a main pipe corresponding to the throat section, and a plurality of branch pipes corresponding to the dry powder pipe and evenly distributed along the circumference are also connected to the distributing pipe, and the axis of the branch pipe is arranged as a skew line with the axis of the main pipe.

[0006] Further, the feeding mechanism includes a dry powder bin and a hopper connected to the dry powder bin, the discharging end of the hopper is connected with a gas-solid ejector, and the discharging end of the gas-solid ejector is communicated with the dry powder pipe.

[0007] Further, the water supply mechanism includes a filter communicated with the water tank, a delivery pipe connected to the filter and communicated with the water pipe, and a water pump connected to the delivery pipe.

[0008] Further, the discharge end of the buffer tank is connected with a screw pump, and the screw pump is connected with a discharge pipe connected to the fracturing blender truck.

[0009] Further, one end of the branch pipe close to the throat pipe is connected with a conical cylinder corresponding to the tapered section, and a plurality of spiral rods capable of guiding dry powder and water flow are evenly distributed along the circumference of the conical cylinder; one end of the spiral rod far away from the conical cylinder is fixedly connected with an annular connecting cylinder, and a plurality of the spiral rods are fixedly connected with the connecting cylinder.

[0010] Further, an outer connecting disc is detachably connected to the tapered section, and an inner connecting disc fixedly connected to the dry powder pipe is detachably connected to the outer connecting disc; a cleaning structure is arranged on the outer connecting disc, and the cleaning structure can drive the inner connecting disc to rotate while moving axially along the dry powder pipe, so that the inner connecting disc drives the spiral rod to move through the dry powder pipe to clean the inner wall of the throat pipe.

[0011] Further, a connecting column is fixedly connected to the outer connecting disc, and a transmission chamber is connected to the connecting column; a motor is connected to the transmission chamber, the output end of the motor is connected with a driving bevel gear, a first output bevel gear is meshed with the driving bevel gear, and a rotating component capable of driving the inner connecting disc to rotate is connected to the first output bevel gear; a second output bevel gear is meshed with the first output bevel gear, and a reciprocating component capable of driving the inner connecting disc to move axially along the dry powder pipe is connected to the second output bevel gear.

[0012] Further, the rotating component includes a spline cylinder coaxially and fixedly connected to the first output bevel gear, a spline shaft sleeved on the outer wall of the dry powder pipe is slidably connected to the spline cylinder, and the spline shaft is fixedly connected to the inner connecting disc.

[0013] Further, the reciprocating component includes a crank fixedly connected to the second output bevel gear, and a connecting rod is rotatably connected to the crank; a rotating cylinder is rotatably connected to the inner connecting disc, and the connecting rod is rotatably connected to the rotating cylinder; a guide rod is fixedly connected to the rotating cylinder, and the guide rod is slidably connected to the transmission chamber.

[0014] A using method of a fracturing dry powder on-line preparation skid-mounted device includes the following steps: S1. Move the present application to a corresponding position through a container, add the dry powder in the ton bag into the feeding mechanism, and connect the water supply mechanism to the water tank; the water supply mechanism continuously supplies the water source in the water pipe to the water pipe of the tapered section, and the feeding mechanism supplies the dry powder to the dry powder pipe; S2. The dry powder in the dry powder pipe enters the main pipe and the branch pipes through the material distribution pipe. The dry powder in the main pipe directly enters the throat pipe. Since the axis of the branch pipe is arranged as a skew line with the axis of the main pipe, the dry powder in the branch pipe enters the throat pipe in an inclined spiral manner. The water in the water pipe enters the throat pipe through the tapered section and is mixed with the dry powder. The mixed dry powder and water enter the buffer tank through the flared section.

[0015] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows: 1. When the present invention is in use, through the settings of the material distribution pipe, the main pipe, the branch pipes, the water pipe, the tapered section, the throat pipe, etc., when the dry powder and the water flow are mixed in this application, it not only includes the primary mixing of the dry powder and the water flow in the main pipe, but also includes the secondary mixing of the dry powder and the water flow when the branch pipes move in an inclined spiral in the throat pipe, so as to improve the uniformity of the mixing of the dry powder and the water flow.

[0016] 2. When the present invention is in use, through the settings of the outer connection disk, the inner connection disk, the cleaning structure, the screw rod, etc., after the inner connection disk and the outer connection disk are disassembled, the cleaning structure can drive the dry powder pipe and the screw rod to rotate while moving axially through the inner connection disk, so as to clean the inner wall of the throat pipe. It is convenient for the staff to clean the throat pipe of the solid-liquid injector after the solid-liquid injector has been used for a period of time, so as to ensure the stable and continuous operation of the solid-liquid injector; the screw rod can not only guide and mix the dry powder and the water flow, but also clean the throat pipe, making the functionality of this application stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of the solid-liquid injector in the present invention; Figure 3 It is a cross-sectional view of the solid-liquid injector in the present invention; Figure 4 It is a schematic internal structure diagram of the solid-liquid injector in the present invention; Figure 5 It is a bottom view of the internal structure of the solid-liquid injector in the present invention; Figure 6 It is a schematic diagram of the cooperation state of the structures such as the dry powder pipe, the material distribution pipe, the branch pipes, the main pipe, the screw rod, etc. in the present invention; In the figure: 1, dry powder bin; 2, solid-liquid injector; 3, hopper; 4, buffer tank; 5, screw pump; 6, water tank; 7, filter; 8, water pump; 9, motor; 10, transmission chamber; 11, connecting column; 12, spline shaft; 13, inner connecting disc; 14, outer connecting disc; 15, tapered section; 16, throat tube; 17, flared section; 18, water pipe; 19, rotary drum; 20, connecting rod; 21, crank; 22, dry powder pipe; 23, driving bevel gear; 24, distributing pipe; 25, branch pipe; 26, screw rod; 27, first output bevel gear; 28, spline cylinder; 29, second output bevel gear; 30, guide vane; 31, connecting cylinder; 32, conical cylinder. Detailed implementation mode

[0018] A fracturing dry powder on-line preparation skid-mounted device, as Figure 1-6 shown, includes a container, on which a preparation mechanism is provided, and a feeding mechanism and a water supply mechanism corresponding to the feeding mechanism are connected to the preparation mechanism; the preparation mechanism includes a buffer tank 4, and a solid-liquid injector 2 connected to the feeding mechanism and the water supply mechanism is connected to the buffer tank 4; the solid-liquid injector 2 includes a tapered section 15, a throat tube 16, and a flared section 17 connected in sequence, the flared section 17 is communicated with the buffer tank 4, a dry powder pipe 22 corresponding to the flared section 17 is detachably connected to the tapered section 15, the dry powder pipe 22 is connected to the feeding mechanism, and a water pipe 18 connected to the water supply mechanism is provided on the tapered section 15; the dry powder pipe 22 is connected with a distributing pipe 24, one end of the distributing pipe 24 is connected with a main pipe corresponding to the throat tube 16, and a plurality of branch pipes 25 corresponding to the dry powder pipe 22 and evenly distributed along the circumference are also connected to the distributing pipe 24, and the axis of the branch pipe 25 and the axis of the main pipe are arranged as skew lines; guide vanes 30 connected to the main pipe are fixedly connected to a plurality of the branch pipes 25.

[0019] When the present invention is in use, water is supplied to the solid-liquid injector 2 through the water supply mechanism, and dry powder is supplied to the solid-liquid injector 2 through the feeding mechanism; the dry powder enters the distributing pipe 24 along with nitrogen through the dry powder pipe 22, the dry powder enters the main pipe and the branch pipes 25 through the distributing pipe 24, the dry powder in the main pipe directly enters the throat tube 16, and since the axis of the branch pipe 25 and the axis of the main pipe are arranged as skew lines, the dry powder in the branch pipe 25 enters the throat tube 16 obliquely, and under the action of the throat tube 16, the dry powder moves spirally in the throat tube 16; water flows through the water pipe 18 and enters the throat tube 16 between the tapered section 15 and the main pipe to be mixed with the dry powder, and the mixed dry powder and water flow into the buffer tank 4 through the flared section 17.

[0020] In summary, through the settings of the material distribution pipe 24, the main pipe, the branch pipe 25, the water pipe 18, the tapered section 15, the throat pipe 16, etc., when the dry powder and water flow are mixed in this application, it not only includes the primary mixing of the dry powder and water flow in the main pipe, but also includes the movement of the inclined spiral of the branch pipe 25 in the throat pipe 16 to enable the secondary mixing of the dry powder and water flow, so as to improve the uniformity of the mixing of the dry powder and water flow.

[0021] Further, the feeding mechanism includes a dry powder bin 1 and a hopper 3 connected to the dry powder bin 1. The discharging end of the hopper 3 is connected with a gas-solid injector, and the discharging end of the gas-solid injector is communicated with the dry powder pipe 22; the dry powder bin 1, the hopper 3, and the gas-solid injector are all prior arts and will not be elaborated here; when the feeding mechanism is in use, the dry powder in the ton bag is added into the dry powder bin 1, and the dry powder in the dry powder bin 1 is continuously conveyed into the hopper 3 through the screw feeder on the hopper 3. Under the action of the gas-solid injector, the dry powder in the hopper 3 is conveyed into the dry powder pipe 22 in cooperation with nitrogen.

[0022] Further, the water supply mechanism includes a filter 7 communicated with a water tank 6. A conveying pipe communicated with the water pipe 18 is connected to the filter 7, and a water pump 8 is connected to the conveying pipe; a pressure transmitter, a flowmeter, and an electric valve are sequentially arranged on the conveying pipe from the water pump 8 to the water pipe 18. Butterfly valves are arranged on the pipelines between the filter 7 and the water tank 6 and between the filter 7 and the water pump 8. A quick connector cooperating with the water tank 6 is arranged on the pipeline where the filter 7 is communicated with the water tank 6; the pipeline on the filter 7 is connected to the water tank 6 through the quick connector. Under the action of the water pump 8, the water in the water pipe 18 sequentially passes through the filter 7, the pressure transmitter, the flowmeter, etc. and enters the water pipe 18.

[0023] Further, the discharging end of the buffer tank 4 is connected with a screw pump 5. An discharging pipe connected to a fracturing sand mixer is connected to the screw pump 5. A pressure transmitter, a check valve, and a butterfly valve are sequentially arranged on the discharging pipe from the screw pump 5 to the fracturing sand mixer. A quick connector cooperating with the fracturing sand mixer is arranged on the discharging pipe; the fracturing fluid prepared in the buffer tank 4 is conveyed into the fracturing sand mixer through the screw pump 5.

[0024] Further, as Figure 6 shown, one end of the branch pipe 25 close to the throat pipe 16 is connected with a conical cylinder 32 corresponding to the tapered section 15, so that the water flow enters the throat pipe 16 more smoothly; a plurality of spiral rods 26 capable of guiding the dry powder and water flow are evenly distributed along the circumference of the conical cylinder 32; one end of the spiral rod 26 far from the conical cylinder 32 is fixedly connected with an annular connecting cylinder 31, and a plurality of the spiral rods 26 are all fixedly connected with the connecting cylinder 31; the connecting cylinder 31 is used to connect one end of the spiral rod 26 far from the conical cylinder 32 to improve the stability of the spiral rod 26.

[0025] Further, as Figure 2 andFigure 3 As shown, an outer connection disk 14 is detachably connected to the tapered section 15, and an inner connection disk 13 fixedly connected to the dry powder pipe 22 is detachably connected to the outer connection disk 14; a plurality of outer connection bolts screwed to the tapered section 15 are inserted through the outer connection disk 14, and a plurality of inner connection bolts screwed to the outer connection disk 14 are inserted through the inner connection disk 13; a cleaning structure is provided on the outer connection disk 14, and the cleaning structure can drive the inner connection disk 13 to rotate while moving axially along the dry powder pipe 22, so that the inner connection disk 13 drives the screw rod 26 to move through the dry powder pipe 22 to clean the inner wall of the throat pipe 16. Supported by the outer connection disk 14 for the cleaning structure, after the inner connection disk 13 and the outer connection disk 14 are disassembled, the cleaning structure can drive the dry powder pipe 22 and the screw rod 26 to rotate while moving axially through the inner connection disk 13, thereby cleaning the inner wall of the throat pipe 16, facilitating the staff to clean the throat pipe 16 of the solid-liquid injector 2 after the solid-liquid injector 2 has been used for a period of time, so as to ensure the stable and continuous operation of the solid-liquid injector 2; enabling the screw rod 26 to not only guide and mix the dry powder and water flow, but also clean the throat pipe 16, making the functionality of the present application relatively strong.

[0026] Further, as Figure 4 shown, a connection column 11 is fixedly connected to the outer connection disk 14, and a transmission chamber 10 is connected to the connection column 11; a motor 9 is connected to the transmission chamber 10, an output end of the motor 9 is connected to a driving bevel gear 23, a first output bevel gear 27 is engaged with the driving bevel gear 23, and a rotating assembly capable of driving the inner connection disk 13 to rotate is connected to the first output bevel gear 27; a second output bevel gear 29 is engaged with the first output bevel gear 27, and a reciprocating assembly capable of driving the inner connection disk 13 to move axially along the dry powder pipe 22 is connected to the second output bevel gear 29.

[0027] Further, as Figure 4 shown, the rotating assembly includes a spline cylinder 28 fixedly connected coaxially with the first output bevel gear 27, a spline shaft 12 sleeved on the outer wall of the dry powder pipe 22 is slidably connected to the spline cylinder 28, and the spline shaft 12 is fixedly connected to the inner connection disk 13.

[0028] When the rotating assembly is in use, the driving bevel gear 23 is driven to rotate by the motor 9, and the driving bevel gear 23 rotates through the first output bevel gear 27; the first output bevel gear 27 drives the spline shaft 12 to rotate through the spline cylinder 28, the spline shaft 12 drives the inner connection disk 13 to rotate, and the inner connection disk 13 drives the screw rod 26 to rotate through the dry powder pipe 22, the branch pipe 25, and the conical cylinder 32, so that the screw rod 26 cleans the inner wall of the throat pipe 16; in addition, when the inner connection disk 13 moves axially, the inner connection disk 13 drives the spline shaft 12 to slide along the spline cylinder 28.

[0029] Further, as Figure 4As shown, the reciprocating assembly includes a crank 21 fixedly connected to the second output bevel gear 29. A connecting rod 20 is rotatably connected to the crank 21. A rotating cylinder 19 is rotatably connected to the inner connection disk 13. The connecting rod 20 is rotatably connected to the rotating cylinder 19. A guide rod is fixedly connected to the rotating cylinder 19, and the guide rod is slidably connected to the transmission chamber 10. When the first output bevel gear 27 rotates, the first output bevel gear 27 drives the crank 21 to rotate through the second output bevel gear 29. Since the crank 21, the connecting rod 20, and the rotating cylinder 19 form a crank-slider mechanism, when the crank 21 rotates, the crank 21 can drive the rotating cylinder 19 to move axially through the connecting rod 20. Through the cooperation of the guide rod and the transmission chamber 10, the axial movement of the rotating cylinder 19 is guided. The rotating cylinder 19 drives the inner connection disk 13 to move axially, so that the inner connection disk 13 moves axially while rotating.

[0030] A method for using a fracturing dry powder on-line preparation skid-mounted device includes the following steps: S1. Move the present application to the corresponding position through a container, add the dry powder in the ton bag into the dry powder bin 1. The dry powder in the dry powder bin 1 is continuously conveyed into the hopper 3 through the screw feeder on the hopper 3. Under the action of the pneumatic-solid injector, the dry powder is conveyed into the dry powder pipe 22 in cooperation with nitrogen. The pipeline on the filter 7 is connected to the water tank 6 through a quick connector. Under the action of the water pump 8, the water in the water pipe 18 sequentially passes through the filter 7, the pressure transmitter, the flowmeter, etc. and enters the water pipe 18.

[0031] S2. The dry powder in the main pipe directly enters the throat pipe 16. Since the axis of the branch pipe 25 and the axis of the main pipe are arranged as skew lines, the dry powder in the branch pipe 25 enters the throat pipe 16 obliquely. Under the action of the throat pipe 16, the dry powder moves spirally in the throat pipe 16. The water flows through the water pipe 18 and enters the throat pipe 16 through the tapered section 15 between the main pipe and mixes with the dry powder. The mixed dry powder and water flow through the flared section 17 and enter the buffer tank 4. The fracturing fluid prepared in the buffer tank 4 is conveyed to the fracturing sand mixing truck through the screw pump 5.

Claims

1. An on-line preparation skid-mounted device for fracturing dry powder, comprising a container, a preparation mechanism is provided on the container, a feeding mechanism and a water supply mechanism corresponding to the feeding mechanism are connected to the preparation mechanism; characterized in that: The compounding mechanism includes a buffer tank (4), and a solid-liquid injector (2) connected to the feeding mechanism and the water supply mechanism is connected to the buffer tank (4); the solid-liquid injector (2) includes a gradually reducing section (15), a throat (16), and a flaring section (17) connected in sequence. The flaring section (17) is communicated with the buffer tank (4). A dry powder pipe (22) corresponding to the flaring section (17) is detachably connected to the gradually reducing section (15). The dry powder pipe (22) is connected to the feeding mechanism, and a water pipe (18) connected to the water supply mechanism is arranged on the gradually reducing section (15); the dry powder pipe (22) is connected with a material distribution pipe (24). One end of the material distribution pipe (24) is connected with a main pipe corresponding to the throat (16), and a plurality of branch pipes (25) corresponding to the dry powder pipe (22) and evenly distributed along the circumference are also connected to the material distribution pipe (24). The axis of the branch pipe (25) is arranged as a skew line with the axis of the main pipe.

2. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 1, characterized in that: The feeding mechanism includes a dry powder bin (1) and a hopper (3) connected to the dry powder bin (1). The discharging end of the hopper (3) is connected with a gas-solid injector, and the discharging end of the gas-solid injector is communicated with the dry powder pipe (22).

3. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 1, characterized in that: The water supply mechanism includes a filter (7) communicated with a water tank (6). A conveying pipe communicated with the water pipe (18) is connected to the filter (7), and a water pump (8) is connected to the conveying pipe.

4. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 1, characterized in that: The discharging end of the buffer tank (4) is connected with a screw pump (5), and a discharging pipe connected to a fracturing blender truck is connected to the screw pump (5).

5. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 1, characterized in that: One end of the branch pipe (25) close to the throat (16) is connected with a conical cylinder (32) corresponding to the gradually reducing section (15). A plurality of spiral rods (26) capable of guiding dry powder and water flow are evenly distributed along the circumference on the conical cylinder (32); one end of the spiral rod (26) far from the conical cylinder (32) is fixedly connected with an annular connecting cylinder (31), and a plurality of the spiral rods (26) are fixedly connected with the connecting cylinder (31).

6. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 5, characterized in that: An outer connecting disk (14) is detachably connected to the gradually reducing section (15), and an inner connecting disk (13) fixedly connected with the dry powder pipe (22) is detachably connected to the outer connecting disk (14); a cleaning structure is arranged on the outer connecting disk (14). The cleaning structure can drive the inner connecting disk (13) to rotate while moving axially along the dry powder pipe (22), so that the inner connecting disk (13) drives the spiral rod (26) to move through the dry powder pipe (22) to clean the inner wall of the throat (16).

7. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 6, characterized in that: A connecting column (11) is fixedly connected to the outer connecting disk (14), and a transmission chamber (10) is connected to the connecting column (11); a motor (9) is connected to the transmission chamber (10). The output end of the motor (9) is connected with a driving bevel gear (23). A first output bevel gear (27) is meshed with the driving bevel gear (23), and a rotating component capable of driving the inner connecting disk (13) to rotate is connected to the first output bevel gear (27); a second output bevel gear (29) is meshed with the first output bevel gear (27), and a reciprocating component capable of driving the inner connecting disk (13) to move axially along the dry powder pipe (22) is connected to the second output bevel gear (29).

8. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 7, characterized in that: The rotating assembly includes a spline cylinder (28) coaxially and fixedly connected to the first output bevel gear (27). A spline shaft (12) sleeved on the outer wall of the dry powder pipe (22) is slidably connected to the spline cylinder (28), and the spline shaft (12) is fixedly connected to the inner connection disk (13).

9. The on-line preparation skid-mounted equipment for fracturing dry powder according to claim 7, characterized in that: The reciprocating assembly includes a crank (21) fixedly connected to the second output bevel gear (29). A connecting rod (20) is rotatably connected to the crank (21); a rotating cylinder (19) is rotatably connected to the inner connection disk (13), and the connecting rod (20) is rotatably connected to the rotating cylinder (19); a guide rod is fixedly connected to the rotating cylinder (19), and the guide rod is slidably connected to the transmission chamber (10).

10. The usage method of the on-line preparation skid-mounted equipment for fracturing dry powder according to any one of claims 1-9, characterized in that: It includes the following steps: S1. Move the present application to the corresponding position through a container, add the dry powder in the ton bag into the feeding mechanism, and connect the water supply mechanism to the water tank (6); the water supply mechanism continuously supplies the water source in the water pipe (18) to the water pipe (18) of the tapered section (15), and the feeding mechanism supplies the dry powder to the dry powder pipe (22). S2. The dry powder in the dry powder pipe (22) enters the main pipe and the branch pipe (25) through the distribution pipe (24). The dry powder in the main pipe directly enters the throat pipe (16); since the axis of the branch pipe (25) and the axis of the main pipe are arranged as skew lines, the dry powder in the branch pipe (25) spirally enters the throat pipe (16) obliquely; the water in the water pipe (18) enters the throat pipe (16) through the tapered section (15) and is mixed with the dry powder. The mixed dry powder and water enter the buffer tank (4) through the flared section (17).

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