Telescopic stirring paddle structure and reaction kettle

Abstract

The utility model relates to the technical field of chemical reaction kettle equipment, and discloses a telescopic stirring paddle structure and a reaction kettle. The telescopic stirring paddle structure comprises a stirring shaft, paddles and a telescopic connecting structure, the paddles comprise telescopic paddles and fixed paddles, the telescopic paddles are connected with the stirring shaft through the telescopic connecting structure, the fixed paddles are fixedly connected with the stirring shaft, and the telescopic paddles can slide relative to the fixed paddles in the radial direction of the stirring shaft; a limiting sliding groove is formed in the first face, abutting against the telescopic paddle, of the fixed paddle and extends in the radial direction of the stirring shaft, a limiting protrusion is arranged on the second face, abutting against the fixed paddle, of the telescopic paddle, and the limiting protrusion is inserted into the limiting sliding groove in a sliding mode. The telescopic paddle can stretch out and draw back in the radial direction of the stirring shaft to be close to the inner wall of the kettle as much as possible, so that high-viscosity materials in the reaction kettle can be uniformly stirred in the stirring process, the product yield is improved, the fixed paddle is fixed relative to the stirring shaft and is in sliding connection with the telescopic paddle, and the connection stability of the telescopic paddle and the stirring shaft is enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical reaction vessel equipment, and in particular to a telescopic stirring paddle structure and a reaction vessel. Background Technology

[0002] The reactor is equipped with an agitator. After the material enters the reactor, the agitator can be activated to disperse it. Currently, most reactors use frame-type agitators. When the product material has a high viscosity, such as lithium battery binder, the agitator should be as close to the reactor wall as possible to increase the mixing area for thorough dispersion. However, because the width of the reactor opening is smaller than the width of the reactor body, and the agitator width is set smaller than the diameter of the opening to facilitate loading, the agitator, which should be as close to the reactor wall as possible, cannot be directly inserted, resulting in insufficient mixing and affecting the product's performance.

[0003] Therefore, there is an urgent need for a telescopic stirring paddle structure and a reaction vessel to solve the above problems. Utility Model Content

[0004] One objective of this invention is to provide a telescopic stirring paddle structure that allows the paddle blades to be as close as possible to the reactor wall, thereby ensuring that high-viscosity materials in the reactor can be stirred evenly during the stirring process and improving product yield.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A telescopic stirring paddle structure is provided, including a stirring shaft, paddle blades, and a telescopic connection structure. The paddle blades include telescopic paddle blades and fixed paddle blades. The telescopic paddle blades are connected to the stirring shaft through the telescopic connection structure, and the fixed paddle blades are fixedly connected to the stirring shaft. The telescopic connection structure can extend and retract radially along the stirring shaft, and allows the telescopic paddle blades to slide relative to the fixed paddle blades radially along the stirring shaft.

[0007] The fixed blade abuts against the telescopic blade on the first surface with a limiting groove, the limiting groove extending radially along the stirring shaft, and the telescopic blade abuts against the fixed blade on the second surface with a limiting protrusion, the limiting protrusion slidingly inserted into the limiting groove.

[0008] Optionally, the telescopic connection structure includes a telescopic member that can extend and retract radially along the stirring shaft. One end of the telescopic member is connected to the stirring shaft, and the other end of the telescopic member is connected to the telescopic blade.

[0009] Optionally, the telescopic connection structure further includes a rotating member, a connecting member, and an elastic member. The stirring shaft has a first cavity that extends axially along the stirring shaft. The rotating member is inserted into the first cavity. One end of the connecting member passes through the telescopic member and is wound around the rotating member. The other end of the connecting member is connected to the telescopic blade. Rotation of the rotating member can change the number of turns the connecting member is wound around the rotating member, so that the telescopic blade moves closer to or further away from the stirring shaft.

[0010] The telescopic component includes a first rod and a second rod, one of which is slidably inserted into the other. The end of the first rod that is not slidably connected to the second rod is connected to the stirring shaft, and the end of the second rod that is not slidably connected to the first rod is connected to the telescopic blade.

[0011] The telescopic member has a through second cavity that extends radially along the stirring shaft. The elastic member is located within the second cavity, with one end of the elastic member abutting the telescopic blade and the other end of the elastic member abutting the stirring shaft or the end of the first rod away from the stirring shaft. The elastic member is used to give the telescopic blade a tendency to move away from the stirring shaft.

[0012] Optionally, the end of the limiting groove away from the stirring shaft has a first baffle. The first baffle is used to press against the first pressing surface of the limiting protrusion when the telescopic blade is in the extended state. The first pressing surface is located on the side of the limiting protrusion away from the stirring shaft.

[0013] Optionally, the limiting groove has a second baffle at the other end near the stirring shaft. The second baffle is used to press against the second pressing surface of the limiting protrusion when the telescopic blade is in the retracted state. The second pressing surface is located on the other side of the limiting protrusion near the stirring shaft.

[0014] Optionally, the limiting protrusion is disposed at the end of the telescopic blade near the stirring shaft.

[0015] Optionally, the fixed blade is an arc-shaped structure, the telescopic blade is a strip-shaped structure, the fixed blade is located below the telescopic blade, and the two telescopic blades and the fixed blade are combined to form a U-shaped blade structure.

[0016] Optionally, multiple sets of the telescopic connection structure are provided, and the multiple sets of the telescopic connection structure are spaced apart along the axial direction of the stirring shaft. Each set of the telescopic connection structure includes two telescopic connection structures that are radially opposite to each other along the stirring shaft.

[0017] Optionally, the outer surfaces of the stirring shaft, the telescopic blade, the fixed blade, and the telescopic component are all provided with a corrosion-resistant coating.

[0018] Another objective of this invention is to provide a reaction vessel in which the impeller can be as close as possible to the vessel wall, thereby ensuring that high-viscosity materials in the reaction vessel can be stirred evenly during the stirring process and improving product yield.

[0019] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0020] A reaction vessel is provided, comprising a reaction vessel body and the aforementioned telescopic stirring blade structure, wherein the blade can extend into the reaction vessel body through the vessel opening.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model proposes a telescopic stirring paddle structure, including a stirring shaft, paddle blades, and a telescopic connecting structure. The paddle blades include telescopic blades and fixed blades. The telescopic blades are connected to the stirring shaft via the telescopic connecting structure, and the fixed blades are fixedly connected to the stirring shaft. The telescopic connecting structure can extend and retract radially along the stirring shaft, allowing the telescopic blades to slide relative to the fixed blades radially along the stirring shaft. In specific implementations, if the stirring paddle is a frame-type stirring paddle, to ensure that the blades are as close as possible to the inner wall of the reactor while also allowing the blades to extend from the reactor opening, the blades can be divided into two parts: telescopic blades and fixed blades. The telescopic blades can extend and retract radially along the stirring shaft to be as close as possible to the inner wall of the reactor, thereby ensuring that high-viscosity materials in the reactor are stirred evenly during the stirring process, improving product yield. The fixed blades are fixed relative to the stirring shaft and simultaneously slidably connected to the telescopic blades, thereby enhancing the connection stability between the telescopic blades and the stirring shaft and ensuring the performance of the telescopic blades when stirring high-viscosity materials. Specifically, a limiting groove is provided on the first surface of the fixed blade that abuts against the telescopic blade, and the limiting groove extends radially along the stirring shaft. A limiting protrusion is provided on the second surface of the telescopic blade that abuts against the fixed blade, and the limiting protrusion slides into the limiting groove. When the telescopic blade slides radially along the stirring shaft, the limiting protrusion will slide accordingly within the limiting groove. The setting of the limiting protrusion ensures that when the blade is rotated by the stirring shaft, the telescopic blade will not have relative displacement with the fixed blade in the circumferential direction of the stirring shaft. That is, when stirring materials with high viscosity, it ensures that the telescopic blade and the fixed blade will not separate.

[0023] The reaction vessel proposed in this utility model includes a reaction vessel body and the aforementioned telescopic stirring paddle structure. The telescopic stirring paddle structure of the reaction vessel allows the paddle blades to extend from the vessel opening and ensures that the paddle blades are as close as possible to the inner wall of the vessel, thereby ensuring that the high-viscosity materials in the reaction vessel can be stirred evenly and improving the product yield. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the telescopic stirring paddle structure provided in this embodiment of the utility model;

[0025] Figure 2 This is a partial cross-sectional view of the telescopic blade and the fixed blade provided in this embodiment of the utility model;

[0026] Figure 3 This is a partial structural schematic diagram of the telescopic blade provided in an embodiment of the present utility model;

[0027] Figure 4 This is a partial structural schematic diagram of the fixed blade provided in an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the first telescopic connection structure provided in this embodiment of the utility model (retracted state);

[0029] Figure 6 This is a schematic diagram (extended state) of the first telescopic connection structure provided in this embodiment of the present utility model;

[0030] Figure 7 This is a schematic diagram of the second telescopic connection structure provided in this embodiment of the utility model (retracted state);

[0031] Figure 8 This is a schematic diagram of the second telescopic connection structure provided in this embodiment of the utility model (extended state).

[0032] In the picture:

[0033] 1. Stirring shaft; 10. First cavity;

[0034] 2. Telescopic blades; 21. Limiting protrusion; 211. Second pressing surface;

[0035] 3. Fixed blade; 31. Limiting groove; 311. First baffle; 312. Second baffle;

[0036] 4. Rotating parts;

[0037] 5. Telescopic component; 50. Second cavity; 51. First rod; 52. Second rod;

[0038] 6. Elastic components;

[0039] 7. Connectors. Detailed Implementation

[0040] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 4As shown, this embodiment provides a telescopic stirring paddle structure, including a stirring shaft 1, paddle blades, and a telescopic connection structure. The paddle blades include telescopic paddle blades 2 and fixed paddle blades 3. The telescopic paddle blades 2 are connected to the stirring shaft 1 through the telescopic connection structure, and the fixed paddle blades 3 are fixedly connected to the stirring shaft 1. The telescopic connection structure can extend and retract radially along the stirring shaft 1, allowing the telescopic paddle blades 2 to slide relative to the fixed paddle blades 3 radially along the stirring shaft 1. In specific implementation, if the stirring paddle is a frame-type stirring paddle, in order to ensure that the paddle blades can be as close as possible to the inner wall of the reactor, while also ensuring that the paddle blades can extend from the reactor opening, the paddle blades can be divided into two parts: the telescopic paddle blades 2 and the fixed paddle blades 3. The telescopic paddle blades 2 can extend and retract radially along the stirring shaft 1 to be as close as possible to the inner wall of the reactor, thereby ensuring that the high-viscosity materials in the reactor can be stirred evenly during the stirring process, improving the product yield. The fixed paddle blades 3 can be fixed relative to the stirring shaft 1 and simultaneously slidably connected to the telescopic paddle blades 2, thereby enhancing the connection stability between the telescopic paddle blades 2 and the stirring shaft 1, and ensuring the performance of the telescopic paddle blades 2 when stirring high-viscosity materials. Specifically, a limiting groove 31 is provided on the first surface of the fixed blade 3 that abuts against the telescopic blade 2. The limiting groove 31 extends radially along the stirring shaft 1. A limiting protrusion 21 is provided on the second surface of the telescopic blade 2 that abuts against the fixed blade 3. The limiting protrusion 21 slides into the limiting groove 31. When the telescopic blade 2 slides radially along the stirring shaft 1, the limiting protrusion 21 will slide accordingly within the limiting groove 31. The setting of the limiting protrusion 21 ensures that when the blade is rotated by the stirring shaft 1, the telescopic blade 2 will not have relative displacement with the fixed blade 3 in the circumferential direction of the stirring shaft 1. That is, when stirring materials with high viscosity, it ensures that the telescopic blade 2 and the fixed blade 3 will not separate.

[0046] In this embodiment, the fixed blade 3 has an arc-shaped structure, and the telescopic blade 2 has a strip-shaped structure. The fixed blade 3 is located below the telescopic blade 2, that is, the first surface is the top surface of the fixed blade 3, and the second surface is the bottom surface of the telescopic blade 2. The two telescopic blades 2 and one fixed blade 3 are combined to form a U-shaped blade structure.

[0047] Optionally, multiple sets of telescopic connection structures are provided, with these sets spaced apart along the axial direction of the stirring shaft 1. Each set includes two telescopic connection structures, which are arranged radially opposite each other along the stirring shaft 1. In specific implementation, the number of sets of telescopic connection structures is determined according to the axial length of the telescopic blade 2 on the stirring shaft 1, thereby ensuring that all parts of the telescopic blade 2 can be simultaneously extended and retracted.

[0048] In this embodiment, the outer surfaces of the stirring shaft 1, the telescopic blade 2, the fixed blade 3, and the telescopic component 5 are all coated with a corrosion-resistant coating to ensure the service life of the telescopic stirring blade structure.

[0049] Optionally, the telescopic connection structure includes a telescopic component 5, which can extend and retract radially along the stirring shaft 1. One end of the telescopic component 5 is connected to the stirring shaft 1, and the other end is connected to the telescopic blade 2. In a specific implementation, the telescopic component 5 can be a cylinder structure, and the cylinder shaft of the cylinder structure extends radially along the stirring shaft 1. By extending the cylinder shaft, the telescopic blade 2 can be driven away from the stirring shaft 1, that is, the telescopic blade 2 extends out. By retracting the cylinder shaft, the telescopic blade 2 can be driven closer to the stirring shaft 1, that is, the telescopic blade 2 retracts.

[0050] Optionally, the telescopic connection structure further includes a rotating member 4, a connecting member 7, and an elastic member 6. The stirring shaft 1 has a first cavity 10, which extends along the axial direction of the stirring shaft 1. The rotating member 4 is inserted into the first cavity 10, and one end of the connecting member 7 passes through the telescopic member 5 and is wrapped around the rotating member 4. The other end of the connecting member 7 is connected to the telescopic blade 2. When the rotating member 4 rotates, the number of turns of the connecting member 7 wrapped around the rotating member 4 can be changed, thereby changing the length of the connecting member 7 connected between the telescopic blade 2 and the rotating member 4, so that the telescopic blade 2 moves closer to or further away from the stirring shaft 1.

[0051] Optionally, the telescopic member 5 has a through second cavity 50 extending radially along the stirring shaft 1. The elastic member 6 is located within the second cavity 50, with one end of the elastic member 6 abutting against the telescopic blade 2 and the other end of the elastic member 6 abutting against the end of the stirring shaft 1 or the first rod 51 away from the stirring shaft 1. The elastic member 6 is used to give the telescopic blade 2 a tendency to move away from the stirring shaft 1. In this embodiment, the elastic member 6 is a spring.

[0052] In this embodiment, the telescopic component 5 is configured as a telescopic rod structure. The telescopic component 5 includes a first rod 51 and a second rod 52, with one of the first rod 51 and the second rod 52 slidably inserted into the other. The end of the first rod 51 not slidably connected to the second rod 52 is connected to the stirring shaft 1, and the end of the second rod 52 not slidably connected to the first rod 51 is connected to the telescopic blade 2. Specifically, if the end of the first rod 51 is slidably inserted into the cavity of the second rod 52, a guide groove can be provided on the cavity wall of the second rod 52, and a guide protrusion can be provided on the end of the first rod 51. The guide protrusion is slidably inserted into the guide groove to prevent relative rotation between the first rod 51 and the second rod 52, thereby affecting the repositioning of the telescopic blade 2. Furthermore, the guide protrusion also prevents the first rod 51 from detaching from the cavity of the second rod 52.

[0053] In this embodiment, the connector 7 is a flexible connecting rope. One end of the connector 7 passes through the second cavity 50 and is wound around the rotating member 4, while the other end of the connector 7 passes through the second cavity 50 and is connected to the telescopic blade 2. Rotation of the rotating member 4 changes the number of turns of the connector 7 around it. In specific implementation, the first cavity 10 and the second cavity 50 are connected, ensuring that the connector 7 can be connected to both the telescopic blade 2 and the rotating member 4. Rotating the rotating member 4 in the forward direction allows the connector 7 to wrap around it more times, thus shortening the length of the connector 7 between the stirring shaft 1 and the telescopic blade 2, causing the telescopic blade 2 to move closer to the stirring shaft 1. Rotating the rotating member 4 in the reverse direction allows the connector 7 to wrap around it less times, thus lengthening the length of the connector 7 between the stirring shaft 1 and the telescopic blade 2, allowing the telescopic blade 2 more space away from the stirring shaft 1. In this embodiment, the forward direction is clockwise, and the reverse direction is counterclockwise. In other embodiments, the structure can be adjusted to make the forward direction counterclockwise and the reverse direction clockwise.

[0054] This embodiment provides two telescopic connection structures. For example... Figure 5 and Figure 6 As shown, in the first telescopic connection structure, the elastic element 6 is located within the second cavity 50. One end of the elastic element 6 abuts against the telescopic blade 2, and the other end abuts against the stirring shaft 1. In specific implementation, when the connecting piece 7 between the telescopic blade 2 and the stirring shaft 1 lengthens, the external force on the elastic element 6 decreases, allowing the elastic element 6 to recover its deformation and lengthen the telescopic element 5, thereby driving the telescopic blade 2 to move away from the rotating member 4. When the connecting piece 7 between the telescopic blade 2 and the rotating member 4 shortens, i.e., the connecting piece 7 drives the telescopic blade 2 to move towards the rotating member 4, the elastic element 6 shortens due to the compression between the telescopic blade 2 and the stirring shaft 1.

[0055] like Figure 7 and Figure 8 As shown, the elastic element 6 of the second telescopic connection structure is also located in the second cavity 50, with one end of the elastic element 6 abutting against the telescopic blade 2 and the other end of the elastic element 6 abutting against the end of the first rod 51 away from the stirring shaft 1. In specific implementation, when the connecting piece 7 between the telescopic blade 2 and the stirring shaft 1 becomes longer, the external force on the elastic element 6 decreases, and the elastic element 6 can recover its deformation to push the first rod 51 to move away from the second rod 52, thereby making the telescopic element 5 longer, so as to drive the telescopic blade 2 to move away from the rotating member 4. When the connecting piece 7 between the telescopic blade 2 and the rotating member 4 shortens, that is, when the connecting piece 7 drives the telescopic blade 2 to move towards the rotating member 4, the elastic element 6 is shortened by the compression of the telescopic blade 2 and the first rod 51.

[0056] Furthermore, such as Figure 4As shown, the end of the limiting groove 31 away from the stirring shaft 1 has a first baffle 311. The first baffle 311 is used to press against the first pressing surface of the limiting protrusion 21 when the telescopic blade 2 is in the extended state. The first pressing surface is located on the side of the limiting protrusion 21 away from the stirring shaft 1. The first baffle 311 is provided to limit the distance that the limiting protrusion 21 slides towards the end away from the stirring shaft 1, that is, the extension length of the telescopic blade 2.

[0057] Optionally, such as Figure 4 As shown, the limiting groove 31 has a second baffle 312 at the other end near the stirring shaft 1. The second baffle 312 is used to press against the second pressing surface 211 of the limiting protrusion 21 when the telescopic blade 2 is in the retracted state. The second pressing surface 211 is located on the other side of the limiting protrusion 21 near the stirring shaft 1. The second baffle 312 is provided to limit the distance that the limiting protrusion 21 slides towards the end near the stirring shaft 1, so as to ensure that the telescopic blade 2 is in the same position each time it retracts.

[0058] In practical implementation, since the limiting protrusion 21 needs to slide within the limiting groove 31, the length of the limiting protrusion 21 in the radial direction of the stirring shaft 1 is much smaller than that of the limiting groove 31. That is, the length of the limiting protrusion 21 can be reasonably set according to the required extension length of the telescopic blade 2. The length of the limiting groove 31 minus the length of the limiting protrusion 21 is the length by which the telescopic blade 2 can extend away from the stirring shaft 1. In this embodiment, when the telescopic blade 2 is in the retracted state, the limiting protrusion 21 is inserted into the limiting groove 31 and abuts against the second baffle 312, so that the telescopic blade 2 and the fixed blade 3 are flush in the radial direction of the stirring shaft 1. When the telescopic blade 2 is in the extended state, the limiting protrusion 21 is inserted into the limiting groove 31 and abuts against the first baffle 311, so that the telescopic blade 2 and the fixed blade 3 overlap in the radial direction of the stirring shaft 1.

[0059] This embodiment also provides a reaction vessel, including a reaction vessel body and the above-mentioned telescopic stirring paddle structure. The telescopic stirring paddle structure of the reaction vessel allows the paddle blades to extend from the vessel opening into the reaction vessel body and ensures that the paddle blades are as close as possible to the inner wall of the vessel, thereby ensuring that the high-viscosity material in the reaction vessel can be stirred evenly during the stirring process and improving the product yield.

[0060] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A telescopic stirring paddle structure, characterized in that, The device includes a stirring shaft (1), blades, and a telescopic connection structure. The blades include a telescopic blade (2) and a fixed blade (3). The telescopic blade (2) is connected to the stirring shaft (1) through the telescopic connection structure. The fixed blade (3) is fixedly connected to the stirring shaft (1). The telescopic connection structure can extend and retract radially along the stirring shaft (1), and allows the telescopic blade (2) to slide relative to the fixed blade (3) radially along the stirring shaft (1). The fixed blade (3) has a limiting groove (31) on the first surface that abuts against the telescopic blade (2). The limiting groove (31) extends radially along the stirring shaft (1). The telescopic blade (2) has a limiting protrusion (21) on the second surface that abuts against the fixed blade (3). The limiting protrusion (21) slides into the limiting groove (31).

2. The telescopic stirring paddle structure according to claim 1, characterized in that, The telescopic connection structure includes a telescopic component (5), which is capable of extending and retracting radially along the stirring shaft (1). One end of the telescopic component (5) is connected to the stirring shaft (1), and the other end of the telescopic component (5) is connected to the telescopic blade (2).

3. The telescopic stirring paddle structure according to claim 2, characterized in that, The telescopic connection structure further includes a rotating member (4), a connecting member (7), and an elastic member (6). The stirring shaft (1) has a first cavity (10) that extends along the axial direction of the stirring shaft (1). The rotating member (4) is inserted into the first cavity (10). One end of the connecting member (7) passes through the telescopic member (5) and is wrapped around the rotating member (4). The other end of the connecting member (7) is connected to the telescopic blade (2). The rotation of the rotating member (4) can change the number of turns of the connecting member (7) wrapped around the rotating member (4) so ​​that the telescopic blade (2) moves closer to or further away from the stirring shaft (1). The telescopic component (5) includes a first rod (51) and a second rod (52), one of the first rod (51) and the second rod (52) being slidably inserted into the other. The end of the first rod (51) that is not slidably connected to the second rod (52) is connected to the stirring shaft (1), and the end of the second rod (52) that is not slidably connected to the first rod (51) is connected to the telescopic blade (2). The telescopic member (5) has a through second cavity (50) that extends radially along the stirring shaft (1). The elastic member (6) is located in the second cavity (50), and one end of the elastic member (6) abuts against the telescopic blade (2), while the other end of the elastic member (6) abuts against the stirring shaft (1) or the end of the first rod (51) away from the stirring shaft (1). The elastic member (6) is used to make the telescopic blade (2) have a tendency to move away from the stirring shaft (1).

4. The telescopic stirring paddle structure according to claim 1, characterized in that, The limiting groove (31) has a first baffle (311) at one end away from the stirring shaft (1). The first baffle (311) is used to press against the first pressing surface of the limiting protrusion (21) when the telescopic blade (2) is in the extended state. The first pressing surface is located on the side of the limiting protrusion (21) away from the stirring shaft (1).

5. The telescopic stirring paddle structure according to claim 4, characterized in that, The limiting groove (31) has a second baffle (312) at the other end near the stirring shaft (1). The second baffle (312) is used to press against the second pressing surface (211) of the limiting protrusion (21) when the telescopic blade (2) is in the retracted state. The second pressing surface (211) is located on the other side of the limiting protrusion (21) near the stirring shaft (1).

6. The telescopic stirring paddle structure according to claim 5, characterized in that, The limiting protrusion (21) is located at the end of the telescopic blade (2) near the stirring shaft (1).

7. The telescopic stirring paddle structure according to claim 1, characterized in that, The fixed blade (3) has an arc-shaped structure, the telescopic blade (2) has a strip-shaped structure, the fixed blade (3) is located below the telescopic blade (2), and the two telescopic blades (2) and the fixed blade (3) are combined to form the blade with a U-shaped structure.

8. The telescopic stirring paddle structure according to claim 7, characterized in that, The telescopic connection structure is provided in multiple sets, and the multiple sets of telescopic connection structures are arranged at intervals along the axial direction of the stirring shaft (1). Each set of telescopic connection structures includes two telescopic connection structures arranged radially opposite to each other along the stirring shaft (1).

9. The telescopic stirring paddle structure according to claim 2, characterized in that, The surfaces of the stirring shaft (1), the telescopic blade (2), the fixed blade (3), and the telescopic component (5) are all coated with a corrosion-resistant coating.

10. A reaction vessel, characterized in that, It includes a reactor body and a telescopic stirring paddle structure as described in any one of claims 1 to 9, wherein the paddle blades can extend into the reactor body through the vessel opening.

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