An automatic proportioning and mixing machine for fracturing thickener dry powder

Abstract

This application discloses an automatic mixing machine for thickener dry powder used in fracturing, including a material proportioning tank, a mixing drum, and other components. The material proportioning tank is divided into first and second proportioning chambers with separate dry and wet zones by a partition plate. Precise quantitative mixing of the thickener dry powder and liquid is achieved using rotating first and second mixing balls and their quantitative cavities. A duct system, in conjunction with a fan, generates pulsed airflow to prevent dry powder adsorption, and a permeable membrane in the transition pipe ensures gas discharge. The stirring structure inside the mixing drum ensures thorough mixing of the materials. This equipment achieves automatic and precise proportioning and mixing of thickener dry powder, effectively improving proportioning accuracy and mixing efficiency, reducing manual intervention, lowering labor intensity, and providing a stable mixture for fracturing operations.

Description

Technical Field

[0001] This utility model relates to the field of fracturing equipment technology, specifically to an automatic proportioning and mixing machine for fracturing thickener dry powder. Background Technology

[0002] In fracturing operations for energy extraction such as oil and natural gas, the mixing quality of the thickener dry powder plays a crucial role in the fracturing effect.

[0003] Currently, most traditional thickener dry powder mixing equipment suffers from low automation. At the same time, existing equipment is prone to material residue and uneven mixing during the mixing of dry and wet materials, resulting in unstable quality of the mixture and failing to meet the demands of modern fracturing operations for high efficiency, precision, and stability. Utility Model Content

[0004] To address the aforementioned technical problems, this application solves the issues of low automation and uneven mixing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: an automatic mixing machine for dry powder of thickener for fracturing, including a material proportioning box, wherein the material proportioning box is a vertically penetrating cylinder, and a base is integrally formed in the middle and lower section of the cylinder, wherein the area of ​​the cylinder above the base is the upper cavity, and the area of ​​the cylinder below the base is the lower cavity;

[0006] The upper cavity is sealed and divided into a first proportioning cavity and a second proportioning cavity by a partition plate. The substrate located below the first proportioning cavity has a first mounting cavity, and the substrate located below the second proportioning cavity has a second mounting cavity. The upper and lower sides of the first mounting cavity are respectively connected to the first proportioning cavity and the lower cavity in the vertical direction. A second dispensing ball is rotatably arranged in the first mounting cavity. The upper and lower sides of the second mounting cavity are respectively connected to the second proportioning cavity and the lower cavity in the vertical direction. A first dispensing ball is rotatably arranged in the second mounting cavity. An air duct extending from the material proportioning box is opened on the inner peripheral wall of the second mounting cavity. A first quantitative cavity is opened in the first dispensing ball, and a first dispensing ball inlet communicating with the first quantitative cavity is opened at the top. An air hole communicating with the first quantitative cavity is opened on the side wall of the first dispensing ball. A second quantitative cavity is opened in the second dispensing ball, and a second dispensing ball inlet communicating with the second quantitative cavity is opened at the top.

[0007] The output port of the lower cavity is connected to the mixing tank via a transition pipe; wherein...

[0008] The first quantitative cavity can be switched and connected between the second proportioning cavity and the lower cavity respectively; the air hole can be connected to the air duct; the second quantitative cavity can be switched and connected between the first proportioning cavity and the lower cavity respectively.

[0009] To better realize this utility model, further, a first long shaft hole communicating with the second mounting cavity is opened on the left side wall of the lower section of the material proportioning box, and a first rotating hole is opened on the right side wall inside the second mounting cavity;

[0010] A second rotating hole is provided on the left side wall inside the first mounting cavity, and a second long shaft hole communicating with the first mounting cavity is provided on the right side wall at the lower section of the material proportioning box.

[0011] The material proportioning box has a first motor base and a second motor base respectively provided on the left and right side walls at the bottom. The first motor base is located below the first long shaft hole, and the second motor base is located below the second long shaft hole.

[0012] A fan base is provided on the front and rear side walls of the bottom of the material proportioning box, and a fan bracket is provided on the upper surface of the fan base. Air ducts communicating with the second mounting cavity are respectively provided on the front and rear side walls of the lower section of the material proportioning box. The fan base and the fan bracket are both located below the air ducts.

[0013] The first mixing ball has a first long axis and a first short axis respectively provided on the outer peripheral walls of its left and right sides. The first short axis is rotatably connected to the first rotating hole through a bearing, and the first long axis is rotatably connected to the first long axis hole through a bearing. The second mixing ball has a second short axis and a second long axis respectively provided on the outer peripheral walls of its left and right sides. The second short axis is rotatably connected to the second rotating hole through a bearing, and the second long axis is rotatably connected to the second long axis hole through a bearing.

[0014] A third motor is provided on the first motor base, and the output shaft of the third motor is connected to the portion of the first long shaft that extends out of the material proportioning box. A fourth motor is provided on the second motor base, and the output shaft of the fourth motor is connected to the portion of the second long shaft that extends out of the material proportioning box.

[0015] The fan support is provided with a fan housing, and the output port of the fan housing is connected to the input port of the air duct.

[0016] To better realize this utility model, there are two first mixing chambers and two second mixing chambers. The two first mixing chambers are separated by a partition structure, and the two second mixing chambers are separated by a partition plate. The inner peripheral wall of the second mixing chamber is a sloping surface.

[0017] To better realize this utility model, the partition structure further includes a movable partition, the bottom surface of which is provided with a sealing strip, the top surface of which is provided with a support frame, and a hydraulic telescopic rod is provided between the support frame and the movable partition.

[0018] To better realize this utility model, a ventilation window is further provided on the outer peripheral wall of the transition tube, and a ventilation membrane is provided on the ventilation window, the pore size of the ventilation membrane being 0.01-0.1μm.

[0019] To better realize this utility model, the mixing tank further includes a mixing chamber with a top opening, a mixing output port communicating with the mixing chamber on the bottom outer peripheral wall of the mixing tank, a first valve on the mixing output port, support legs around the bottom of the mixing tank, a third motor base on the bottom of the mixing tank, a first motor on the third motor base, the output end of the first motor being connected to the first rotating shaft, a vertical through hole at the center of the bottom of the mixing tank, the first rotating shaft passing through the through hole from bottom to top and placed inside the mixing chamber, and the first rotating shaft and the through hole being rotatably sealed, with mixing and stirring blades on the outer side of the upper section of the first rotating shaft.

[0020] To better realize this utility model, the fan housing has an installation cavity, a suction hole communicating with the installation cavity is opened on one side wall of the fan housing, a fan motor mounting seat is provided on the other side wall of the fan housing, and a second motor is provided on the fan motor mounting seat;

[0021] The mounting cavity is rotatably provided with a second rotating shaft. One end of the second rotating shaft is rotatably provided through a groove opened on the inner end face of the mounting cavity corresponding to a bearing. The other end of the second rotating shaft is rotatably provided through a rotating hole opened on the inner end face of the mounting cavity corresponding to another bearing. The portion of the other end of the second rotating shaft extending out of the rotating hole is connected to the output end of the second motor.

[0022] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0023] 1. In this utility model, the design of the first and second mixing balls and their quantitative cavity enables precise quantitative mixing of thickener dry powder and liquid. Compared with traditional manual or simple equipment mixing, it greatly improves the mixing accuracy, ensures stable fracturing fluid performance, and meets the needs of different fracturing operations.

[0024] 2. In this utility model, the stirring structure inside the mixing tank and the reasonable conveying path of the material in the equipment ensure that the thickener powder and liquid can be fully mixed, solving the problem of uneven mixing in existing equipment and improving mixing efficiency and mixing quality.

[0025] 3. In this utility model, each component of the equipment is driven by a motor, realizing automated operation from material proportioning to mixing, reducing manual intervention, reducing labor intensity, improving production efficiency, and reducing labor costs.

[0026] 4. In this utility model, the air duct and the fan work together to generate pulsed air, which can effectively flush the first quantitative cavity, prevent the thickener powder from being adsorbed inside, ensure the accuracy of the ratio and the normal operation of the equipment, and reduce the frequency and cost of equipment maintenance.

[0027] 5. In this utility model, the partition structure of the first and second mixing chambers can be adjusted in number according to actual needs, so that the same material can be mixed through multiple mixing balls, thereby improving mixing efficiency and enhancing the adaptability of the equipment to different production tasks.

[0028] 6. In this utility model, the permeable membrane ensures the discharge of gas inside the equipment, maintains stable internal pressure, prevents material leakage, and ensures the safety and stability of equipment operation. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a structural diagram of the material proportioning box;

[0032] Figure 3 for Figure 2 Side view;

[0033] Figure 4 for Figure 3 Sectional view at point AA;

[0034] Figure 5 This is a schematic diagram of the structure of the first mixing ball;

[0035] Figure 6 for Figure 5 Top view;

[0036] Figure 7 for Figure 6 Sectional view at BB;

[0037] Figure 8 This is a schematic diagram of the structure of the second distribution ball;

[0038] Figure 9 This is a schematic diagram showing the coordination of the material mixing box, the fan housing, the second motor, and the third motor.

[0039] Figure 10 for Figure 9 Top view;

[0040] Figure 11 This is a schematic diagram showing the interaction between the movable partition and the material proportioning box;

[0041] Figure 12 This is a schematic diagram showing the combination of the material proportioning box and the first mixing ball;

[0042] Figure 13 This is a schematic diagram of the transition tube structure;

[0043] Figure 14 Schematic diagram of the mixing tank Figure 1 ;

[0044] Figure 15 Schematic diagram of the mixing tank Figure 2 ;

[0045] Figure 16 This is a schematic diagram showing the assembly of the fan housing, air intake, and air outlet.

[0046] Figure 17 for Figure 16 The front view;

[0047] Figure 18 for Figure 17 Sectional view at point DD.

[0048] Explanation of reference numerals in the attached drawings: 101-Material proportioning box; 102-Divider plate; 103-Base; 104-First proportioning chamber; 105-Second proportioning chamber; 1061-First mounting chamber; 1062-Second mounting chamber; 107-First motor base; 108-Second motor base; 109-Fan base; 110-First long shaft hole; 111-Second long shaft hole; 112-Fan bracket; 113-Air duct; 201-First mixing ball; 202-First short shaft; 203-First long shaft; 204-Air hole; 205-First mixing ball inlet; 206-First quantitative cavity; 207-Second mixing ball; 208-Second short shaft; 209-First... Two long shafts; 210-Second mixing ball inlet; 211-Second quantitative cavity; 301-Transition pipe; 302-Ventilating membrane; 401-Mixing tank; 402-Mixing output port; 403-First valve; 404-Support leg; 405-Third motor base; 406-First motor; 407-First rotating shaft; 408-Mixing stirring blade; 501-Fan housing; 502-Inlet; 503-Outlet; 504-Second motor; 505-Second rotating shaft; 506-Fan blade; 601-Third motor; 701-Fourth motor; 801-Modible partition; 802-Sealing strip; 803-Support frame; 804-Hydraulic telescopic rod. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0054] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] Example 1

[0056] like Figures 1 to 18 As shown, an automatic mixing machine for dry powder of thickener for fracturing includes a material proportioning box 101. The material proportioning box 101 is a vertically penetrating cylinder. A base 103 is integrally formed in the middle and lower section of the cylinder. The area of ​​the cylinder above the base 103 is the upper cavity, and the area of ​​the cylinder below the base 103 is the lower cavity.

[0057] The upper cavity is sealed and divided into a first mixing cavity 104 and a second mixing cavity 105 by a partition plate 102. A first mounting cavity 1061 is formed inside the base 103 below the first mixing cavity 104, and a second mounting cavity 1062 is formed inside the base 103 below the second mixing cavity 105. The upper and lower sides of the first mounting cavity 1061 are vertically connected to the first mixing cavity 104 and the lower cavity, respectively. A second mixing ball 207 is rotatably disposed within the first mounting cavity 1061. The upper and lower sides of the second mounting cavity 1062 are vertically connected to the second mixing cavity 105 and the lower cavity, respectively. The second mounting cavity 1062 is rotatably provided with a first mixing ball 201. The inner peripheral wall of the second mounting cavity 1062 is provided with an air duct 113 extending out of the material proportioning box 101. The first mixing ball 201 is provided with a first quantitative cavity 206. The top of the first mixing ball 201 is provided with a first mixing ball inlet 205 communicating with the first quantitative cavity 206. The side wall of the first mixing ball 201 is provided with an air hole 204 communicating with the first quantitative cavity 206. The second mixing ball 207 is provided with a second quantitative cavity 211. The top of the second mixing ball 207 is provided with a second mixing ball inlet 210 communicating with the second quantitative cavity 211.

[0058] The output port of the lower cavity is connected to the mixing tank 401 via a transition pipe 301; wherein...

[0059] The first quantitative cavity 206 can be switched and connected between the second proportioning cavity 105 and the lower cavity respectively; the air hole 204 can be connected to the air duct 113; the second quantitative cavity 211 can be switched and connected between the first proportioning cavity 104 and the lower cavity respectively.

[0060] like Figures 1 to 18 As shown, in this embodiment, a first long shaft hole 110 communicating with the second mounting cavity 1062 is provided on the left side wall of the lower section of the material proportioning box 101, and a first rotating hole is provided on the right side wall inside the second mounting cavity 1062.

[0061] A second rotating hole is provided on the left side wall inside the first mounting cavity 1061, and a second long shaft hole 111 communicating with the first mounting cavity 1061 is provided on the right side wall at the lower section of the material proportioning box 101.

[0062] The material proportioning box 101 has a first motor base 107 and a second motor base 108 respectively provided on the left and right side walls at the bottom. The first motor base 107 is located below the first long shaft hole 110, and the second motor base 108 is located below the second long shaft hole 111.

[0063] The material proportioning box 101 has a fan base 109 on the front and rear side walls at the bottom, and a fan bracket 112 on the upper surface of the fan base 109. The material proportioning box 101 has air ducts 113 corresponding to the second mounting cavity 1062 on the front and rear side walls at the lower part of the material proportioning box 101. The fan base 109 and the fan bracket 112 are both located below the air ducts 113.

[0064] The first mixing ball 201 has a first long shaft 203 and a first short shaft 202 respectively provided on the outer peripheral walls of its left and right sides. The first short shaft 202 is rotatably connected to the first rotating hole through a bearing, and the first long shaft 203 is rotatably connected to the first long shaft hole 110 through a bearing. The second mixing ball 207 has a second short shaft 208 and a second long shaft 209 respectively provided on the outer peripheral walls of its left and right sides. The second short shaft 208 is rotatably connected to the second rotating hole through a bearing, and the second long shaft 209 is rotatably connected to the second long shaft hole 111 through a bearing.

[0065] A third motor 601 is provided on the first motor base 107, and the output shaft of the third motor 601 is connected to the part of the first long shaft 203 extending out of the material proportioning box 101. A fourth motor 701 is provided on the second motor base 108, and the output shaft of the fourth motor 701 is connected to the part of the second long shaft 209 extending out of the material proportioning box 101.

[0066] The fan support 112 is provided with a fan housing 501, and the output port of the fan housing 501 is connected to the input port of the air duct 113.

[0067] like Figures 1 to 18 As shown, in this embodiment, there are two first mixing chambers 104 and two second mixing chambers 105. The two first mixing chambers 104 are separated by a partition structure, and the two second mixing chambers 105 are separated by a partition plate. The inner peripheral wall of the second mixing chamber 105 is a sloping surface.

[0068] like Figures 1 to 18 As shown, in this embodiment, the partition structure includes a movable partition 801, a sealing strip 802 is provided on the bottom surface of the movable partition 801, a support frame 803 is provided on the top surface of the material proportioning box 101, and a hydraulic telescopic rod 804 is provided between the support frame 803 and the movable partition 801.

[0069] like Figures 1 to 18 As shown, in this embodiment, a ventilated window is provided on the outer peripheral wall of the transition tube 301, and a ventilated membrane 302 is provided on the ventilated window. The pore size of the ventilated membrane is 0.01-0.1μm.

[0070] like Figures 1 to 18 As shown, in this embodiment, the mixing tank 401 has a mixing chamber with a top opening. A mixing output port 402 communicating with the mixing chamber is provided on the bottom outer peripheral wall of the mixing tank 401. A first valve 403 is provided on the mixing output port 402. Support legs 404 are provided around the bottom surface of the mixing tank 401. A third motor base 405 is provided on the bottom surface of the mixing tank 401. A first motor 406 is provided on the third motor base 405. The output end of the first motor 406 is connected to the first rotating shaft 407. A vertical through hole is opened at the center of the bottom surface of the mixing tank 401. The first rotating shaft 407 passes through the through hole from bottom to top and is placed in the mixing chamber. The first rotating shaft 407 and the through hole are rotatably sealed by a sealed deep groove ball bearing (the first rotating shaft 407 and the through hole can also be connected by other existing mature rotary sealing parts). A mixing and stirring blade 408 is provided on the outer side of the upper section of the first rotating shaft 407.

[0071] like Figures 1 to 18 As shown, in this embodiment, the fan housing 501 has an installation cavity, and a suction hole 502 communicating with the installation cavity is opened on one side wall of the fan housing 501. A fan motor mounting seat is provided on the other side wall of the fan housing 501, and a second motor 504 is provided on the fan motor mounting seat.

[0072] The mounting cavity is rotatably provided with a second rotating shaft 505. One end of the second rotating shaft 505 is rotatably provided through a groove opened on the inner end face of the mounting cavity corresponding to a bearing. The other end of the second rotating shaft 505 is rotatably provided through a rotating hole opened on the inner end face of the mounting cavity corresponding to another bearing. The portion of the other end of the second rotating shaft 505 extending out of the rotating hole is connected to the output end of the second motor 504.

[0073] Additionally, a guide groove matching the side of the movable partition 801 can be formed on one side wall of the partition plate 102, and a sealing strip is provided between the side of the movable partition 801 and the guide groove. The air intake vent 502 can be connected to external nitrogen gas, and the introduction of nitrogen gas prevents reaction with thickener powder, water, additives (such as crosslinking agents, degumming agents, pH adjusters), etc.

[0074] Working principle:

[0075] Activating the hydraulic telescopic rod 804 causes the movable partition 801 and sealing strip 802 to rise, merging the two first proportioning chambers 104 into one first proportioning chamber 104, allowing the same material to be proportioned through multiple second proportioning balls 207, thereby improving proportioning efficiency.

[0076] An automatic mixing machine for fracturing thickener dry powder has been designed with dry and wet zones to avoid interference between them. The dry zone is the second mixing chamber 105, and the wet zone is the first mixing chamber 104. The inner peripheral wall of the second mixing chamber 105 is a sloping surface to facilitate the sliding of the thickener dry powder.

[0077] The third motor 601 is driven to rotate the second mixing ball 207, the second short shaft 208, and the second long shaft 209 by 180°. This changes the connection between the second mixing ball inlet 210 and the first proportioning chamber 104, so that the second mixing ball inlet 210 is connected to the lower chamber. This allows a specific amount of liquid (which may be water, additives (such as crosslinking agents, depolymerizers, pH adjusters, etc.)) loaded into the second quantitative cavity 211 to be transported from the first proportioning chamber 104 to the lower chamber. Then, under the action of gravity, it falls through the transition tube 301 until it enters the mixing chamber inside the mixing tank 401. For the next transport, the third motor 601 is driven again to rotate the second mixing ball 207, the second short shaft 208, and the second long shaft 209 by 180° in the opposite direction, thereby resetting the second mixing ball 207. The above process is then repeated.

[0078] The fourth motor 701 is driven, causing the first mixing ball 201, the first short shaft 202, and the first long shaft 203 to rotate 180°. This changes the connection between the first mixing ball inlet 205 and the second proportioning chamber 105, switching the connection between the first mixing ball inlet 205 and the lower chamber. This allows the measured amount of thickener powder loaded into the first metering cavity 206 to be transported from the second proportioning chamber 105 to the lower chamber. At this time, the air vent 204 rotates 90° and aligns with and connects to the air duct 113. The second motor 5... 04 Intermittent start-up causes the fan housing 501 to generate pulsed airflow. The airflow enters the air duct 113 and then the air hole 204, pulsatingly purging the first metering cavity 206. This prevents the thickener powder from adsorbing into the first metering cavity 206 (during the process of driving the fourth motor 701 to rotate the first mixing ball 201, the first short shaft 202, and the first long shaft 203 by 180°, the air hole 204 is only opened once, aligned and connected with the air duct 113). The purging gas can be discharged through the breathable membrane 302. Then, under the influence of gravity, it falls through the transition tube 301 until it enters the mixing chamber inside the mixing tank 401. When it is transported for the next time, the second motor 504 is stopped, and the fourth motor 701 is driven again, so that the first mixing ball 201, the first short shaft 202 and the first long shaft 203 first rotate 180° in the opposite direction (during the process of driving the fourth motor 701 again so that the first mixing ball 201, the first short shaft 202 and the first long shaft 203 first rotate 180° in the opposite direction, the air hole 204 is always not open), so as to realize the reset of the first mixing ball 201, and then repeat the above process.

[0079] When the thickener powder, water, and additives (such as crosslinking agents, debriding agents, and pH adjusters) are all mixed to the required consistency, the first motor 406 is started, causing the output end of the first motor 406 to drive the first rotating shaft 407 and the mixing blades 408 to rotate, thereby achieving mixing. The mixed liquid is discharged through the mixing output port 402 (during this process, the first valve 403 is opened).

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic proportioning and mixing machine for fracturing thickener dry powder, characterized in that: Includes a material proportioning box (101) and a first rotating shaft (407). The material proportioning box (101) is a vertically penetrating cylinder. A base (103) is integrally formed in the lower middle section of the cylinder. The area of ​​the cylinder above the base (103) is the upper cavity, and the area of ​​the cylinder below the base (103) is the lower cavity. The upper cavity is sealed and divided into a first mixing cavity (104) and a second mixing cavity (105) by a partition plate (102). The base (103) located below the first mixing cavity (104) has a first mounting cavity (1061) inside, and the base (103) located below the second mixing cavity (105) has a second mounting cavity (1062) inside. The upper and lower sides of the first mounting cavity (1061) are respectively connected to the first mixing cavity (104) and the lower cavity in the vertical direction. A second mixing ball (207) is rotatably disposed in the first mounting cavity (1061). The upper and lower sides of the second mounting cavity (1062) are respectively connected to the second mixing cavity (105) and the lower cavity in the vertical direction. The second mounting cavity (1062) is rotatably provided with a first mixing ball (201). The inner peripheral wall of the second mounting cavity (1062) is provided with an air duct (113) extending out of the material proportioning box (101). The first mixing ball (201) is provided with a first quantitative cavity (206). The top of the first mixing ball (201) is provided with a first mixing ball inlet (205) communicating with the first quantitative cavity (206). The side wall of the first mixing ball (201) is provided with an air hole (204) communicating with the first quantitative cavity (206). The second mixing ball (207) is provided with a second quantitative cavity (211). The top of the second mixing ball (217) is provided with a second mixing ball inlet (210) communicating with the second quantitative cavity (211). The output port of the lower cavity is connected to the mixing tank (401) via a transition pipe (301); wherein, The first quantitative cavity (206) can be switched and connected between the second proportioning cavity (105) and the lower cavity respectively; the air hole (204) can be connected to the air duct (113); the second quantitative cavity (211) can be switched and connected between the first proportioning cavity (104) and the lower cavity respectively.

2. The automatic proportioning and mixing machine for fracturing thickener dry powder according to claim 1, characterized in that: The material proportioning box (101) has a first long shaft hole (110) on the left side wall of the lower section that communicates with the second mounting cavity (1062), and a first rotating hole is provided on the right side wall inside the second mounting cavity (1062). A second rotating hole is provided on the left side wall inside the first mounting cavity (1061), and a second long shaft hole (111) communicating with the first mounting cavity (1061) is provided on the right side wall at the lower section of the material proportioning box (101). The material proportioning box (101) has a first motor base (107) and a second motor base (108) respectively on the left and right side walls at the bottom. The first motor base (107) is located below the first long shaft hole (110), and the second motor base (108) is located below the second long shaft hole (111). A fan base (109) is provided on the front and rear side walls of the bottom of the material proportioning box (101). A fan bracket (112) is provided on the upper surface of the fan base (109). Air ducts (113) communicating with the second mounting cavity (1062) are respectively provided on the front and rear side walls of the lower section of the material proportioning box (101). The fan base (109) and the fan bracket (112) are both located below the air ducts (113). The first mixing ball (201) has a first long shaft (203) and a first short shaft (202) respectively provided on the outer peripheral walls of its left and right sides. The first short shaft (202) is rotatably connected to the first rotating hole through a bearing, and the first long shaft (203) is rotatably connected to the first long shaft hole (110) through a bearing. The second mixing ball (207) has a second short shaft (208) and a second long shaft (209) respectively provided on the outer peripheral walls of its left and right sides. The second short shaft (208) is rotatably connected to the second rotating hole through a bearing, and the second long shaft (209) is rotatably connected to the second long shaft hole (111) through a bearing. A third motor (601) is provided on the first motor base (107), and the output shaft of the third motor (601) is connected to the part of the first long shaft (203) extending out of the material proportioning box (101). A fourth motor (701) is provided on the second motor base (108), and the output shaft of the fourth motor (701) is connected to the part of the second long shaft (209) extending out of the material proportioning box (101). The fan bracket (112) is provided with a fan housing (501), and the output port of the fan housing (501) is connected to the input port of the air duct (113).

3. The automatic proportioning and mixing machine for fracturing thickener dry powder according to claim 2, characterized in that: There are two first mixing chambers (104) and two second mixing chambers (105). The two first mixing chambers (104) are separated by a partition structure, and the two second mixing chambers (105) are separated by a partition plate. The inner peripheral wall of the second mixing chamber (105) is a sloping surface.

4. The automatic proportioning and mixing machine for fracturing thickener dry powder according to claim 3, characterized in that: The partition structure includes a movable partition (801), a sealing strip (802) is provided on the bottom surface of the movable partition (801), a support frame (803) is provided on the top surface of the material proportioning box (101), and a hydraulic telescopic rod (804) is provided between the support frame (803) and the movable partition (801).

5. The automatic proportioning and mixing machine for fracturing thickener dry powder according to claim 4, characterized in that: The outer peripheral wall of the transition tube (301) is provided with a ventilation window, and a ventilation membrane (302) is provided on the ventilation window. The pore size of the ventilation membrane is 0.01-0.1μm.

6. An automatic proportioning and mixing machine for fracturing thickener dry powder according to claim 5, characterized in that: The mixing tank (401) has a mixing chamber with a top opening. A mixing output port (402) communicating with the mixing chamber is provided on the bottom outer peripheral wall of the mixing tank (401). A first valve (403) is provided on the mixing output port (402). Support legs (404) are provided around the bottom surface of the mixing tank (401). A third motor base (405) is provided on the bottom surface of the mixing tank (401). A first motor (406) is provided on the third motor base (405). The output end of the first motor (406) is connected to the first rotating shaft (407). A vertical through hole is provided at the center of the bottom surface of the mixing tank (401). The first rotating shaft (407) passes through the through hole from bottom to top and is placed in the mixing chamber. The first rotating shaft (407) and the through hole are rotatably sealed. A mixing and stirring blade (408) is provided on the outer side of the upper section of the first rotating shaft (407).

7. An automatic proportioning and mixing machine for fracturing thickener dry powder according to claim 6, characterized in that: The fan housing (501) has an installation cavity. A suction hole (502) communicating with the installation cavity is opened on one side wall of the fan housing (501). A fan motor mounting seat is provided on the other side wall of the fan housing (501). A second motor (504) is provided on the fan motor mounting seat. The mounting cavity is rotatably provided with a second rotating shaft (505). One end of the second rotating shaft (505) is rotatably provided through a groove opened on the inner end face of the mounting cavity corresponding to a bearing. The other end of the second rotating shaft (505) is rotatably provided through a rotating hole opened on the inner end face of the mounting cavity corresponding to another bearing. The portion of the other end of the second rotating shaft (505) extending out of the rotating hole is connected to the output end of the second motor (504).

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