Vertical powder-liquid mixing and stirring device for oilfield chemical additive

Abstract

The invention relates to the technical field of stirring, and provides a vertical powder-liquid mixing and stirring device for oilfield chemical assistants, which comprises a frame body, a barrel body and a stirring shaft, and also comprises a driving bin, a mechanical pneumatic composite stirring blade, an air supply seat and an eccentric driving rod, the driving bin is arranged on the frame body in a lifting manner, and the stirring shaft is rotatably arranged on the driving bin; the mechanical pneumatic composite stirring blade is fixedly installed on the stirring shaft, the stirring shaft and the mechanical pneumatic composite stirring blade are both of a hollow structure, the air supply base is communicated with the mechanical pneumatic composite stirring blade through the stirring shaft, and an air outlet hole is formed in the mechanical pneumatic composite stirring blade. And the eccentric driving rod is fixedly connected outside the stirring shaft. According to the vertical powder-liquid mixing and stirring device for the oilfield chemical additive, provided by the invention, the chemical additive raw materials are fully mixed by utilizing mechanical stirring and pneumatic stirring of reciprocating lifting of the mechanical-pneumatic composite stirring blades and driving the barrel body to eccentrically rotate by the eccentric driving rod.

Description

Technical Field

[0001] This invention relates to the field of mixing technology, and more specifically to a vertical powder-liquid mixing device for oilfield chemical additives. Background Technology

[0002] In the process of oilfield exploration and production, the formulation and use of chemical additives (such as drilling fluid additives, oil displacement agents, corrosion inhibitors, demulsifiers, etc.) is one of the key links. These additives are usually used in the form of solid powder mixed with liquid base material. The uniformity of mixing, dispersion efficiency and stability directly affect their performance in oilfield operations. Therefore, efficient powder-liquid mixing equipment plays an important role in the preparation of oilfield chemical additives.

[0003] Currently, most commonly used vertical powder-liquid mixing and stirring devices adopt a fixed stirring structure. Their stirring blades are usually conventional straight blades or inclined blades, and they mainly rely on mechanical rotation to achieve mixing. However, when stirring oilfield chemical additives with high viscosity, easy agglomeration, or large solid-liquid density differences, this type of structure often has problems such as insufficient stirring force, uneven mixing, poor powder suspension, and many dead zones, resulting in low mixing efficiency and unstable product quality. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a vertical powder-liquid mixing and stirring device for oilfield chemical additives, which solves the technical problems of insufficient stirring force and poor uniformity of fixed stirring structures in related technologies.

[0005] At least one embodiment of the present invention provides a vertical powder-liquid mixing and stirring device for oilfield chemical additives, including a frame, a barrel, and a stirring shaft, and further comprising: The drive chamber is liftably mounted on the frame, and the stirring shaft is rotatably mounted on the drive chamber. A mechanical-pneumatic composite stirring blade is fixedly installed on the stirring shaft, and an air outlet is provided on the mechanical-pneumatic composite stirring blade for supplying air into the raw material. The air supply seat, the stirring shaft and the mechanical-pneumatic composite stirring blade are both hollow structures, and the air supply seat is connected to the stirring shaft and the mechanical-pneumatic composite stirring blade; An eccentric drive rod is provided, wherein the barrel is eccentrically rotated on the frame, and the eccentric drive rod is fixedly connected to the outside of the stirring shaft, and the eccentric drive rod is in contact with the inner wall of the barrel.

[0006] To ensure the stability of the container, a rotating shaft is rotatably mounted on the frame. The rotating shaft and the stirring shaft are vertically aligned. The rotating shaft is eccentrically fixed to a placement groove for placing the container. The placement groove is provided with a limiting component for restricting the container's movement. The limiting component includes: A limiting plate, which is rotatably mounted on the placement groove; A fixed base is fixedly installed on the placement groove, and a limit spring is provided between the fixed base and the limiting plate; A limiting block is fixedly installed on the outside of the barrel body, and a limiting opening is provided on the limiting plate for the limiting block to pass through.

[0007] To reduce friction between the eccentric drive rod and the barrel, a roller is rotatably connected to the end of the eccentric drive rod, and the roller contacts the inner wall of the barrel.

[0008] To achieve the lifting and lowering of the drive compartment, a fixed cylinder is fixedly installed on the frame, and a lifting rod is fixedly connected to the drive compartment. The lifting rod and the fixed cylinder are slidably connected. A lifting component for driving the drive compartment to lift and lower is provided on the drive compartment, and the lifting component includes: A drive screw, which is rotatably mounted on the drive housing; A fixing nut is fixedly installed on the fixing cylinder, and the driving screw is threadedly connected to the fixing nut.

[0009] To further improve the mixing effect of chemical additives, a temperature controller is installed inside the gas supply seat to regulate the temperature of the gas fed into the raw materials.

[0010] To improve the stability of the placement slot, a ball bearing is rotatably installed at the bottom of the placement slot, and the ball bearing contacts the frame.

[0011] To reduce the spillage of raw materials from the barrel, the frame is equipped with an anti-overflow component to cover the top opening of the barrel. The anti-overflow component includes: A cover plate with a through hole for the stirring shaft to pass through, the cover plate being in contact with the top of the barrel, and a pressure relief valve being installed on the cover plate; A locking plate is rotatably mounted on the frame. The locking plate is connected to a pressure plate via a compression spring, and the pressure plate is in contact with the top end of the cover plate.

[0012] This invention provides a vertical powder-liquid mixing and stirring device for oilfield chemical additives. Compared with the prior art, it uses a liftable mechanical-pneumatic composite stirring blade to agitate raw materials at different heights. At the same time, air is supplied into the interior of the mechanical-pneumatic composite stirring blade to form bubbles inside the raw materials for pneumatic stirring. Through an eccentric drive rod and an eccentrically set rotating shaft, the stirring shaft can drive the barrel to rotate eccentrically when it rotates. Through the reciprocating lifting mechanical stirring, pneumatic stirring, and eccentric rotation of the barrel, oilfield chemical additives with large differences in solid and liquid density can be fully mixed, ensuring the uniformity of the mixture. Attached Figure Description

[0013] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a first-view structural schematic diagram of a vertical powder-liquid mixing and stirring device for oilfield chemical additives provided in an embodiment of the present invention. Figure 2 This is a second-view structural schematic diagram of the entire embodiment of the present invention; Figure 3 This is a partial cross-sectional structural schematic diagram of an embodiment of the present invention; Figure 4 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure of the central frame, stirring shaft, drive chamber, and mechanical-pneumatic composite stirring blades; Figure 5 This is an embodiment of the present invention. Figure 1 Structural diagram of the middle barrel, rotating shaft, placement groove, and limiting component; Figure 6 This is an embodiment of the present invention. Figure 1 Schematic diagram of the central locking plate, pressure plate, and slide bar; Figure 7 This is an embodiment of the present invention. Figure 3 A magnified view of a portion of point A in the middle.

[0015] In the picture: 1. Frame; 2. Tank; 3. Stirring shaft; 4. Drive chamber; 5. Motor 1; 6. Fixed cylinder; 7. Lifting rod; 8. Mechanical-pneumatic composite stirring blade; 9. Air supply seat; 10. Temperature controller; 11. Eccentric drive rod; 12. Roller; 13. Rotating shaft; 14. Placement slot; 15. Ball bearings; 101. Drive screw; 102. Fixing nut; 103. Motor II; 201. Limiting plate; 202. Fixing base; 203. Limiting block; 204. Limiting spring; 301. Cover plate; 302. Locking plate; 303. Pressure relief valve; 304. Pressure plate; 305. Slide rod. Detailed Implementation To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0016] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0017] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and 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.

[0018] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0019] To make the drawings concise and easy to understand, some drawings only show one of the components with the same structure or function, or only one of them is marked. In this article, "one" not only means "only one", but can also mean "more than one", and "several" includes "two" and "more than two".

[0020] Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0021] like Figures 1 to 7 As shown, it illustrates a vertical powder-liquid mixing and stirring device for oilfield chemical additives according to an embodiment of the present invention, including a frame 1, a barrel 2 and a stirring shaft 3, and also including a drive chamber 4, a mechanical-pneumatic composite stirring blade 8, an air supply seat 9 and an eccentric drive rod 11.

[0022] like Figures 1 to 4 As shown, the drive chamber 4 is vertically and flexibly mounted on the frame 1, and the stirring shaft 3 is rotatably mounted on the drive chamber 4. A motor 5 is installed on the drive chamber 4, and the stirring shaft 3 is rotatably mounted on the drive chamber 4. The output ends of the stirring shaft 3 and the motor 5 are connected by a transmission structure such as a sprocket, chain, or belt. To achieve the lifting of the drive chamber 4, a fixed cylinder 6 is fixedly mounted on the frame 1, and a lifting rod 7 is fixedly connected to the drive chamber 4. The lifting rod 7 and the fixed cylinder 6 are slidably connected. The drive chamber 4 is equipped with a lifting component for driving the drive chamber 4 to rise and fall. The lifting component includes a drive screw 101 and a fixing nut 102. The drive screw 101 is rotatably mounted on the drive chamber 4. Motor 103 is installed on the chamber 4. Drive screw 101 is fixedly installed on the output end of motor 103. Fixing nut 102 is fixedly installed on the fixed cylinder 6. Drive screw 101 and fixing nut 102 are threadedly connected. Motor 103 can drive drive screw 101 to rotate. Under the threaded cooperation of drive screw 101 and fixing nut 102, drive chamber 4 to rise and fall relative to fixed cylinder 6. The sliding cooperation between lifting rod 7 and fixed cylinder 6 ensures the stable rise and fall of drive chamber 4, thereby driving stirring shaft 3 to rise and fall, so that mechanical pneumatic composite stirring blade 8 can stir different height positions inside the raw materials, improving the mixing uniformity of chemical additives.

[0023] A mechanical-pneumatic composite stirring blade 8 is fixedly mounted on a stirring shaft 3. A motor 5 drives the stirring shaft 3 and the mechanical-pneumatic composite stirring blade 8 to rotate, mechanically stirring the raw materials inside the tank 2. The mechanical-pneumatic composite stirring blade 8 has an outlet for supplying air into the raw materials. Both the stirring shaft 3 and the mechanical-pneumatic composite stirring blade 8 are hollow structures. An air supply seat 9 is fixedly mounted on the drive chamber 4. The air supply seat 9 is connected to the mechanical-pneumatic composite stirring blade 8 via the stirring shaft 3, and the air supply seat 9 and the stirring shaft 3 are rotatably connected. To further improve the mixing effect of the chemical additives, a temperature controller 10 is installed inside the air supply seat 9 to regulate the temperature of the gas supplied into the raw materials. The air supply seat 9 is connected to external air supply equipment, such as a gas storage tank or a fan. The external air supply equipment supplies air into the mechanical-pneumatic composite stirring blade 8 through the air supply seat 9 and the stirring shaft 3, and the temperature controller 10 regulates the temperature of the supplied gas. The system controls the gas temperature to a suitable level according to the stirring requirements of different oilfield chemical additives. A one-way valve can be installed at the vent to prevent raw materials from flowing back into the mechanical-pneumatic composite stirring blade 8 and stirring shaft 3. The constant-temperature gas discharged from the vent enters the raw materials to form bubbles, which pneumatically stir the raw materials. Vents are provided at the top and bottom of the mechanical-pneumatic composite stirring blade 8. When the mechanical-pneumatic composite stirring blade 8 is in a lower position inside the barrel 2, it can impact and agitate the raw materials on the bottom wall of the barrel 2, preventing denser raw materials from accumulating at the bottom of the barrel 2. The mechanical-pneumatic composite stirring blade 8 moves up and down with the drive chamber 4 and stirring shaft 3 to mechanically and pneumatically stir different heights of the raw materials, ensuring thorough mixing. At the same time, the temperature of the raw materials is regulated to keep them at a suitable mixing temperature, further improving the mixing effect and efficiency.

[0024] like Figures 3 to 5As shown, the barrel 2 is eccentrically rotated on the frame 1. An eccentric drive rod 11 is fixedly connected to the outside of the stirring shaft 3, and the eccentric drive rod 11 contacts the inner wall of the barrel 2. A roller 12 is rotatably connected to the end of the eccentric drive rod 11, and the roller 12 contacts the inner wall of the barrel 2 to reduce friction between the eccentric drive rod 11 and the inner wall of the barrel 2 during rotation. To ensure the stability of the barrel 2, a rotating shaft 13 is rotatably mounted on the frame 1. The rotating shaft 13 and the stirring shaft 3 are vertically aligned. An eccentrically fixed placement groove 14 for placing the barrel 2 is connected to the rotating shaft 13. The 4th column is equipped with a limiting component for limiting the position of the barrel 2. The limiting component includes a limiting plate 201, a fixing seat 202, and a limiting block 203. The limiting plate 201 is rotatably mounted on the placement groove 14, and the fixing seat 202 is fixedly mounted on the placement groove 14. A limiting spring 204 is provided between the fixing seat 202 and the limiting plate 201. The limiting block 203 is fixedly mounted on the outside of the barrel 2. The limiting plate 201 has a limiting opening for the limiting block 203 to pass through. The placement groove 14 can rotate eccentrically around the rotating shaft 13. The upper and lower positions of the rotating shaft 13 and the stirring shaft 3 correspond, and the eccentric drive... Rod 11 is located at its maximum radius position between the eccentric rotating shaft 13 and the barrel 2. Another eccentric drive rod 11 can be added on its opposite side, at its minimum radius position, to assist in driving. The rotation of the eccentric drive rod 11 pushes the barrel 2 to rotate around the rotating shaft 13, further expanding the movement of the raw materials within the barrel 2 and ensuring a better mixing effect. Simultaneously, the eccentric drive rod 11 rotates with the stirring shaft 3, which in turn agitates the raw materials, further reducing dead zones and ensuring uniform mixing. A ball bearing 15 is rotatably mounted at the bottom of the placement tank 14. The ball bearing 15 contacts the frame 1, and through the ball bearing 1... 5. Support and limit the placement groove 14 to ensure the stability of the placement groove 14 and the barrel 2. At the same time, the rotation of the ball bearing 15 reduces the resistance to the rotation of the barrel 2 and the placement groove 14. Place the barrel 2 inside the placement groove 14. Rotate the limiting block 203 to the position corresponding to the limiting plate 201. Under the action of the limiting spring 204, the limiting plate 201 is brought close to the barrel 2. The limiting block 203 is inserted into the limiting port. The limiting plate 201 limits the barrel 2, so that the placement groove 14 and the barrel 2 rotate synchronously, preventing the barrel 2 from being thrown out of the placement groove 14.

[0025] To reduce the overflow of raw materials from the barrel 2, the frame 1 is equipped with an anti-overflow component to cover the top opening of the barrel 2. The anti-overflow component includes a cover plate 301 and a locking plate 302. The cover plate 301 has a through hole for the stirring shaft 3 to pass through. The cover plate 301 contacts the top of the barrel 2. A pressure relief valve 303 is installed on the cover plate 301. The locking plate 302 is rotatably mounted on the frame 1. The locking plate 302 is connected to a pressure plate 304 via a compression spring. The pressure plate 304 contacts the top of the cover plate 301. A sliding rod 305 is fixedly connected to the pressure plate 304. Both the locking plate 302 and the cover plate 301 have sliding holes for the sliding rod 305 to pass through. The cover plate 301 is located outside the stirring shaft 3. The cover plate 301 and the stirring shaft 3 are coaxially arranged, allowing the stirring shaft 3 to rotate smoothly. With the cover plate 301 in a stable position, place the barrel 2 between the placement slot 14 and the cover plate 301. Rotate the locking plate 302 to the position corresponding to the sliding hole. Under the action of the compression spring, the pressure plate 304 presses the cover plate 301 onto the top of the barrel 2 to block the opening of the barrel 2 and prevent the raw materials from splashing out during the mixing process. The sliding rod 305 is inserted into the interior of the sliding hole to further ensure the stability of the cover plate 301. As air is sent into the interior of the barrel 2 through the air outlet, the pressure inside the barrel 2 increases. The excess gas is discharged through the pressure relief valve 303 to prevent excessive pressure inside the barrel 2 from causing damage or affecting the mixing of the raw materials. A feed hopper can be installed on the cover plate 301. During the mixing process, materials can be added in real time to control the raw material ratio and timing of chemical additives.

[0026] This embodiment provides a vertical powder-liquid mixing and stirring device for oilfield chemical additives. The drive screw 101 is rotated by the motor 103, which can drive the mechanical and pneumatic composite stirring blade 8 and the cover plate 301 to a higher position, placing the barrel 2 inside the placement groove 14. The barrel 2 is rotated so that the positions of the limiting block 203 and the limiting plate 201 are aligned. The limiting plate 201 is rotated outward. When the positions of the limiting block 203 and the limiting port are aligned, the limiting plate 201 is released. Under the action of the limiting spring 204, the limiting plate 201 is pressed against the barrel 2, and the limiting block 203 is inserted into the limiting port, thereby restricting the barrel 2 inside the placement groove 14, and the chemical additive raw materials are put into the barrel 2. Motor 2 103 drives the drive screw 101 to rotate, causing the drive chamber 4 to drive the stirring shaft 3 and the cover plate 301 to descend, so that the cover plate 301 and the top of the barrel 2 are pressed together. Rotating the locking plate 302 causes the pressure plate 304 to rotate above the cover plate 301. Rotating the cover plate 301 makes the position of the slide rod 305 correspond to the position of the slide hole. Under the action of the compression spring, the pressure plate 304 presses the cover plate 301 tightly above the barrel 2. The slide rod 305 is inserted into the interior of the slide hole to ensure the stability of the cover plate 301. The cover plate 301 presses the barrel 2 tightly in the placement groove 14 and closes the top opening of the barrel 2. Motor 5 drives the stirring shaft 3 to rotate, and the stirring shaft 3 drives the mechanical-pneumatic composite stirring blade 8 to rotate to mechanically stir the raw materials in the barrel 2. The external air supply device supplies air into the air supply seat 9. The temperature controller 10 regulates the temperature of the gas in the air supply seat 9. The regulated gas enters the mechanical-pneumatic composite stirring blade 8 through the stirring shaft 3 and is sent into the raw materials through the air outlet to pneumatically stir the raw materials. The combination of mechanical stirring and pneumatic stirring fully mixes the materials in the barrel 2. During the mixing process, the motor 103 drives the drive screw 101 to periodically rotate forward and backward, causing the mechanical and pneumatic composite stirring blade 8 to reciprocate up and down inside the barrel 2, stirring the raw materials at different heights. At the same time, the stirring shaft 3 drives the eccentric drive rod 11 to rotate, pushing the barrel 2 and the placement tank 14 to rotate eccentrically around the rotating shaft 13, further amplifying the shaking of the raw materials inside the barrel 2 and improving the mixing uniformity of the chemical additives. After mixing is complete, turn off motor 5, pull the slide bar 305 upward to remove it from the inside of the slide hole, and rotate the locking plate 302 to move the pressure plate 304 away from the cover plate 301. Motor 2 103 drives the drive screw 101 to rotate, causing the drive chamber 4, the mechanical-pneumatic composite stirring blade 8 and the cover plate 301 to rise, so that the mechanical-pneumatic composite stirring blade 8 is higher than the barrel 2. Rotate the limiting plate 201 outward to release the limiting block 203 and the barrel 2. Remove the barrel 2 from the placement slot 14 and use the chemical additive.

[0027] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A vertical powder-liquid mixing and stirring device for oilfield chemical additives, comprising a frame (1), a barrel (2), and a stirring shaft (3), characterized in that, Also includes: The drive chamber (4) is vertically and vertically mounted on the frame (1), and the stirring shaft (3) is rotatably mounted on the drive chamber (4). Mechanical-pneumatic composite stirring blade (8), which is fixedly installed on the stirring shaft (3); The air supply seat (9), the stirring shaft (3) and the mechanical-pneumatic composite stirring blade (8) are both hollow structures. The air supply seat (9) is connected to the mechanical-pneumatic composite stirring blade (8) through the stirring shaft (3). The mechanical-pneumatic composite stirring blade (8) is provided with an air outlet for supplying air into the raw material. An eccentric drive rod (11) is eccentrically mounted on the frame (1) of the barrel (2). The eccentric drive rod (11) is fixedly connected to the outside of the stirring shaft (3). The eccentric drive rod (11) is in contact with the inner wall of the barrel (2).

2. The vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 1, characterized in that, A rotating shaft (13) is rotatably mounted on the frame (1). The rotating shaft (13) and the stirring shaft (3) are vertically aligned. The rotating shaft (13) is eccentrically fixedly connected to a placement groove (14) for placing the barrel (2). A limiting member for limiting the barrel (2) is provided on the placement groove (14).

3. The vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 2, characterized in that, The limiting component includes: A limiting plate (201) is rotatably mounted on the placement groove (14); A fixed seat (202) is fixedly installed on the placement groove (14), and a limit spring (204) is provided between the fixed seat (202) and the limiting plate (201). Limiting block (203), the limiting block (203) is fixedly installed on the outside of the barrel body (2), and the limiting plate (201) has a limiting opening for the limiting block (203) to pass through.

4. The vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 1, characterized in that, The end of the eccentric drive rod (11) is rotatably connected to a roller (12), and the roller (12) is in contact with the inner wall of the barrel (2).

5. A vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 1, characterized in that, A fixed cylinder (6) is fixedly installed on the frame (1), and a lifting rod (7) is fixedly connected to the drive chamber (4). The lifting rod (7) and the fixed cylinder (6) are slidably connected. A lifting component for driving the drive chamber (4) to lift is provided on the drive chamber (4).

6. A vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 5, characterized in that, The lifting component includes: A drive screw (101) is rotatably mounted on the drive housing (4); A fixing nut (102) is fixedly installed on the fixing cylinder (6), and the drive screw (101) and the fixing nut (102) are threadedly connected.

7. A vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 1, characterized in that, The gas supply seat (9) is equipped with a temperature controller (10) for regulating the temperature of the gas fed into the raw material.

8. A vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 1, characterized in that, The frame (1) is provided with an anti-overflow component for covering the top opening of the barrel (2).

9. A vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 8, characterized in that, The overflow prevention component includes: The cover plate (301) has a through hole for the stirring shaft (3) to pass through. The cover plate (301) is in contact with the top of the barrel (2). A pressure relief valve (303) is installed on the cover plate (301). Locking plate (302), which is rotatably mounted on the frame (1), is connected to pressure plate (304) by compression spring, and the pressure plate (304) is in contact with the top of the cover plate (301).

10. A vertical powder-liquid mixing and stirring device for oilfield chemical additives according to claim 2, characterized in that, A ball bearing (15) is rotatably mounted on the bottom of the placement slot (14), and the ball bearing (15) contacts the frame (1).

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