Intermediate ladle working layer based on phase change energy storage material temperature control structure

Abstract

The utility model discloses a tundish working layer based on temperature control structure of phase change energy storage material middle, including installation mainboard, the top surface fixed setting of installation mainboard has steering motor, the bottom surface horizontal fixed setting of installation mainboard has fixed bottom disc, the bottom surface horizontal butt joint of fixed bottom disc has rotary bottom disc, from the temperature control aspect to look, the working layer filling phase change energy storage material that is arranged in main middle layer, and this material can automatically carry out phase change according to the change of tundish temperature. When tundish temperature rises, phase change energy storage material absorbs heat and changes from solid to liquid, effectively prevents tundish temperature too high, when temperature reduces, phase change energy storage material releases heat and changes from liquid to solid, avoids tundish temperature too low. This accurate temperature control ability provides stable temperature environment for the metal liquid in tundish, helps to improve the quality of metal liquid, reduces the defect caused by temperature fluctuation, and promotes the qualified rate of product.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, specifically to a working layer of an intermediate tundish based on a temperature control structure of phase change energy storage materials. Background Technology

[0002] Metallurgy is a science and technology that studies the extraction, processing, preparation, and properties of metallic materials. It includes not only traditional iron and steel metallurgy but also many other branches such as non-ferrous metallurgy. With the development of science and technology, metallurgical technology is also constantly advancing, evolving from traditional pyrometallurgy to modern technologies such as hydrometallurgy and electrometallurgy.

[0003] In modern metallurgical processes, steel materials need to be transferred and stored. Traditional tundish structures are supported by fixed brackets, which makes it difficult to adjust the direction and position, affecting subsequent multi-point adjustments and hindering the improvement of metallurgical efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a working layer for a tundish based on a temperature control structure using phase change energy storage materials. This addresses the issue raised in the background art where, during current metallurgical processes, steel materials need to be transferred and stored. Traditional tundish structures are fixed supports, which makes it difficult to adjust the direction and position, affecting subsequent multi-point adjustments and hindering the improvement of metallurgical efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a working layer of an intermediate liner based on a phase change energy storage material temperature control structure, including a mounting main board. A steering motor is fixedly mounted on the top surface of the mounting main board. A fixed chassis is horizontally fixedly mounted on the bottom surface of the mounting main board. A rotating chassis is horizontally connected to the bottom surface of the fixed chassis. Extension rods are horizontally symmetrically arranged on the bottom surface of the rotating chassis. An end motor is fixedly mounted at one end of each extension rod. A telescopic upright is vertically connected to the bottom surface of the extension rod. A bottom connecting rod is vertically fixedly mounted at the bottom end of the telescopic upright. A horizontal connecting rod is horizontally fixedly mounted on one side of the bottom connecting rod. A flipping and transferring block is horizontally connected to one side of the horizontal connecting rod. A horizontal connection is horizontally arranged between the flipping and transferring blocks. The main intermediate layer has horizontally symmetrical mounting slots on the bottom surface of the rotating chassis, a bottom locking hole at the center of the bottom surface of the fixed chassis, a top locking block fixedly installed at the center of the top surface of the rotating chassis, and fixed through holes evenly distributed on the top surface of the rotating chassis. A mounting strip is horizontally welded to the top surface of the extension rod, a bottom horizontal groove is horizontally formed on the bottom surface of the extension rod, a transmission screw is horizontally inserted into the inner side of the bottom horizontal groove, a top locking block is fixedly installed at the top of the telescopic upright, a side horizontal groove is horizontally formed on one side of the horizontal connecting rod, a drive locking block is horizontally fixedly installed at one end of the flipping transfer block, a protective coating is provided on the inner side of the main intermediate layer, and a working layer is fixedly installed on the inner wall of the main intermediate layer.

[0006] Preferably, the steering motor is fixedly mounted at the center of the top surface of the mounting motherboard, and the top surface of the mounting motherboard is uniformly provided with through holes near the edge. The fixed chassis is fixedly connected to the center of the bottom surface of the mounting motherboard, and the top surface of the rotating chassis is connected to the bottom opening end of the bottom card hole.

[0007] Preferably, there are two extension rods, and the top surfaces of the two extension rods are horizontally joined together at the bottom opening of the mounting slot. The output end of the end motor is horizontally extended and fixedly connected to one end of the transmission screw. The telescopic uprights are arranged in pairs, parallel to each other, at the bottom surface of the extension rods.

[0008] Preferably, the bottom connecting rod is U-shaped, the side of the horizontal connecting rod is connected to the bottom end of the side of the bottom connecting rod, the inner side of the flipping transfer block is provided with a flipping motor structure, and one end of the flipping transfer block is horizontally connected to the side opening end of the side horizontal groove. The two sides of the main intermediate layer are connected to the side of the flipping transfer block by shafts, and the top surface of the main intermediate layer is open. The mounting slots are horizontally symmetrically opened at both ends of the bottom diameter line of the rotating chassis, and one end of the mounting slot is open.

[0009] Preferably, the top of the top card block is snapped into the inner side of the bottom card hole, the bottom of the fixing through hole extends to the inner side of the mounting slot to maintain connection, and the mounting strip is horizontally fixed at the top surface of the extension rod at the end away from the end motor, and the mounting strip is horizontally snapped into the inner side of the mounting slot.

[0010] Preferably, the top of the top locking block is locked onto the inner side of the bottom horizontal groove, and the side screw hole is threadedly connected to the outer side of the transmission screw. The bottom of the drive locking block is provided with a drive wheel structure, and the drive locking block is horizontally locked onto the inner side of the side horizontal groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This intermediate tundish working layer, based on a phase change energy storage material (PCS) temperature control structure, offers structural flexibility during daily use. A steering motor allows the entire structure to rotate, facilitating adjustments to the main intermediate layer's position to adapt to different working scenarios and needs. An end motor drives a transmission screw, enabling horizontal movement of the telescopic uprights and adjusting the PCS's horizontal position. The flip-over design of the transfer block allows for flexible opening and closing of the main intermediate layer's opening, facilitating PCS material replacement and replenishment, significantly improving ease of use and efficiency. From a structural stability and durability perspective, the rational design and robust connections of components such as the mounting main board, fixed chassis, and rotating chassis provide a solid foundation for the entire structure, ensuring it can withstand various external forces and maintain structural stability during operation. The protective coating on the inner side of the main intermediate layer effectively protects it from corrosion by the PCS material, extending its service life and reducing maintenance costs and replacement frequency. Regarding temperature control, the working layer within the main intermediate layer is filled with PCS material, which automatically undergoes phase change according to changes in the tundish temperature. When the tundish temperature rises, the phase change energy storage material absorbs heat and changes from a solid to a liquid state, effectively preventing the tundish temperature from becoming too high. When the temperature drops, the phase change energy storage material releases heat and changes from a liquid to a solid state, preventing the tundish temperature from becoming too low. This precise temperature control capability provides a stable temperature environment for the molten metal in the tundish, which helps improve the quality of the molten metal, reduce defects caused by temperature fluctuations, and increase the product yield. Attached Figure Description

[0013] Figure 1 This is a three-dimensional front view of the present invention;

[0014] Figure 2 This is a three-dimensional bottom view of the present invention;

[0015] Figure 3 This is a three-dimensional bottom view of the fixed chassis of this utility model;

[0016] Figure 4 This is a top view of the rotating chassis structure of this utility model;

[0017] Figure 5 This is a three-dimensional structural diagram of the extension rod of this utility model;

[0018] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the main intermediate layer of this utility model.

[0019] In the diagram: 1. Mainboard mounting; 2. Steering motor; 3. Fixed chassis; 4. Rotating chassis; 5. Extension rod; 6. End motor; 7. Telescopic upright; 8. Bottom connecting rod; 9. Horizontal connecting rod; 10. Flipping transfer block; 11. Main intermediate layer; 12. Mounting slot; 13. Bottom locking hole; 14. Top locking block; 15. Fixed through hole; 16. Mounting strip; 17. Bottom horizontal groove; 18. Transmission screw; 19. Top locking block; 20. Side horizontal groove; 21. Drive block; 22. Protective coating; 23. Working layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] like Figure 1-6As shown, this utility model provides a technical solution: a working layer of intermediate package based on a phase change energy storage material temperature control structure, including a mounting main board 1, a steering motor 2 fixedly mounted on the top surface of the mounting main board 1, a fixed base 3 horizontally fixedly mounted on the bottom surface of the mounting main board 1, a rotating base 4 horizontally connected to the bottom surface of the fixed base 3, the steering motor 2 fixedly mounted at the center of the top surface of the mounting main board 1, and through holes evenly provided near the edge of the top surface of the mounting main board 1, the fixed base 3 fixedly connected to the center of the bottom surface of the mounting main board 1, the top surface of the rotating base 4 connected to the bottom opening end of the bottom slot 13, extension rods 5 horizontally and symmetrically arranged on the bottom surface of the rotating base 4, an end motor 6 fixedly mounted at one end of the extension rods 5, a telescopic upright 7 vertically connected to the bottom surface of the extension rods 5, two extension rods 5, and the top surfaces of the two extension rods 5 horizontally connected to the bottom opening end of the mounting slot 12, the output end of the end motor 6 horizontally extending... A fixed connection is set at one end of the transmission screw 18. The telescopic uprights 7 are arranged in pairs and parallel to each other at the bottom of the extension rod 5. A bottom connecting rod 8 is fixed vertically at the bottom end of the telescopic upright 7. A horizontal connecting rod 9 is fixed horizontally on one side of the bottom connecting rod 8. A flipping transfer block 10 is horizontally connected to one side of the horizontal connecting rod 9. A main intermediate layer 11 is horizontally set between the flipping transfer blocks 10. The bottom connecting rod 8 is U-shaped. The side of the horizontal connecting rod 9 is connected to the bottom end of the side of the bottom connecting rod 8. A flipping motor structure is set inside the flipping transfer block 10. One end of the flipping transfer block 10 is horizontally connected to the side opening end of the side horizontal groove 20. The two sides of the main intermediate layer 11 are connected to the side of the flipping transfer block 10 through shafts. The top surface of the main intermediate layer 11 is open. The mounting slots 12 are horizontally symmetrically opened at both ends of the bottom diameter line of the rotating base 4. One end of the mounting slots 12 is open.

[0023] The rational design and solid connection of components such as the main board 1, fixed chassis 3, and rotating chassis 4 provide a solid foundation for the entire structure, ensuring that it can withstand various external forces during operation and maintain structural stability.

[0024] Example 2:

[0025] like Figure 1-6As shown, this utility model provides a technical solution: a working layer of intermediate package based on a phase change energy storage material temperature control structure, including a mounting main board 1, a steering motor 2 fixedly mounted on the top surface of the mounting main board 1, a fixed base 3 horizontally fixedly mounted on the bottom surface of the mounting main board 1, and a rotating base 4 horizontally connected to the bottom surface of the fixed base 3. The steering motor 2 is fixedly mounted at the center of the top surface of the mounting main board 1, and the top surface of the mounting main board 1 has through holes evenly distributed near the edge. The fixed base 3 is fixedly connected to the center of the bottom surface of the mounting main board 1. The top surface of the rotating base 4 is connected to the bottom opening end of the bottom card hole 13, and the bottom surface of the rotating base 4 has horizontally symmetrically arranged extension... The extension rod body 5 has an end motor 6 fixedly installed at one end. A telescopic upright 7 is vertically connected to the bottom surface of the extension rod body 5. There are two extension rod bodies 5, and their top surfaces are horizontally connected at the bottom opening of the mounting slot 12. The output end of the end motor 6 is horizontally extended and fixedly connected to one end of the transmission screw 18. The telescopic upright 7 are arranged in pairs, parallel to each other, on the bottom surface of the extension rod body 5. A bottom connecting rod 8 is vertically fixedly installed at the bottom end of the telescopic upright 7. A horizontal connecting rod 9 is horizontally fixedly installed on one side of the bottom connecting rod 8. A flipping transfer block 10 is horizontally connected to one side of the horizontal connecting rod 9. A main intermediate layer 11 is horizontally arranged between the two ends of the rotating chassis 4. The bottom surface of the rotating chassis 4 has horizontally symmetrically arranged mounting slots 12. The bottom connecting rod 8 is U-shaped. The side of the horizontal connecting rod 9 is connected to the bottom end of the side of the bottom connecting rod 8. A flipping motor structure is arranged inside the flipping transfer block 10, and one end of the flipping transfer block 10 is horizontally connected to the side opening end of the side horizontal groove 20. The two sides of the main intermediate layer 11 are connected to the side of the flipping transfer block 10 via shafts, and the top surface of the main intermediate layer 11 is open. The mounting slots 12 are horizontally symmetrically arranged at both ends of the bottom diameter line of the rotating chassis 4, and one end of the mounting slots 12 is open. A bottom locking hole 13 is provided at the center of the bottom surface of the fixed chassis 3. A top locking block 14 is fixedly provided at the center of the top surface of the rotating chassis 4. Fixed through holes 15 are evenly provided on the top surface of the rotating chassis 4. An installation clip 16 is horizontally welded to the top surface of the extension rod 5. The top of the top locking block 14 is locked to the inner side of the bottom locking hole 13. The bottom ends of the fixed through holes 15 all extend to the inner side of the installation slot 12 to maintain communication. The installation clip 16 is horizontally fixed at the end of the top surface of the extension rod 5 away from the end motor 6, and the installation clip 16 is horizontally locked to the inner side of the installation slot 12. A bottom horizontal groove 17 is horizontally provided on the bottom surface of the extension rod 5.

[0026] The steering motor 2 can drive the entire structure to rotate, facilitating the adjustment of the position of the main intermediate layer 11 to adapt to different working scenarios and needs. The end motor 6 drives the transmission screw 18 to rotate, enabling the telescopic upright 7 to move horizontally, thereby adjusting the horizontal position of the main intermediate layer 11. The flipping design of the flipping transfer block 10 allows the opening of the main intermediate layer 11 to be opened and closed flexibly, facilitating the replacement or replenishment of phase change energy storage materials.

[0027] Example 3:

[0028] like Figure 1-6As shown, this utility model provides a technical solution: a working layer of intermediate package based on a phase change energy storage material temperature control structure, including a mounting main board 1, a steering motor 2 fixedly mounted on the top surface of the mounting main board 1, a fixed base 3 horizontally fixedly mounted on the bottom surface of the mounting main board 1, a rotating base 4 horizontally connected to the bottom surface of the fixed base 3, the steering motor 2 fixedly mounted at the center of the top surface of the mounting main board 1, and through holes evenly opened near the edge of the top surface of the mounting main board 1, the fixed base 3 fixedly connected to the center of the bottom surface of the mounting main board 1, the top surface of the rotating base 4 connected to the bottom opening end of the bottom card hole 13, and an extension rod 5 horizontally and symmetrically arranged on the bottom surface of the rotating base 4, one end of the extension rod 5 fixedly mounted with an end motor 6, and the bottom surface of the extension rod 5 vertically... The system includes two telescopic uprights 7 and two extension rods 5, with their top surfaces horizontally joined at the bottom opening of the mounting slot 12. The output end of the end motor 6 is horizontally extended and fixedly connected to one end of the transmission screw 18. The telescopic uprights 7 are arranged in pairs parallel to each other at the bottom surface of the extension rods 5. A bottom connecting rod 8 is vertically fixed at the bottom end of the telescopic upright 7. A horizontal connecting rod 9 is horizontally fixed on one side of the bottom connecting rod 8. A flipping transfer block 10 is horizontally joined on one side of the horizontal connecting rod 9. A main intermediate layer 11 is horizontally set between the flipping transfer blocks 10. The bottom surface of the rotating base 4 has horizontally symmetrical mounting slots 12. The bottom connecting rod 8 is U-shaped, and the side of the horizontal connecting rod 9 is connected to the bottom connecting rod 12. At the bottom side of the connecting rod 8, a flipping motor structure is provided on the inner side of the flipping transfer block 10, and one end of the flipping transfer block 10 is horizontally connected to the side opening end of the side horizontal groove 20. The two sides of the main intermediate layer 11 are connected by shafts and are located on the side of the flipping transfer block 10, and the top surface of the main intermediate layer 11 is open. The mounting slots 12 are horizontally symmetrically opened at both ends of the bottom diameter line of the rotating base 4, and one end of the mounting slots 12 is open. A bottom locking hole 13 is opened at the center of the bottom surface of the fixed base 3. A top locking rotating block 14 is fixedly installed at the center of the top surface of the rotating base 4. Fixed through holes 15 are evenly opened on the top surface of the rotating base 4. A mounting strip 16 is horizontally fixedly welded to the top surface of the extension rod 5. The top of the top locking rotating block 14 is locked and installed. The bottom edge of the bottom card hole 13 and the bottom end of the fixing through hole 15 both extend to the inner edge of the mounting slot 12 to maintain communication. The mounting strip 16 is horizontally fixed at the end of the top surface of the extension rod 5 away from the end motor 6, and the mounting strip 16 is horizontally engaged with the inner edge of the mounting slot 12. The bottom surface of the extension rod 5 has a horizontally formed bottom horizontal groove 17, and the inner edge of the bottom horizontal groove 17 is horizontally inserted with a transmission screw 18. The top of the telescopic pole 7 is fixedly provided with a top locking block 19. The side edge of the horizontal connecting rod 9 has a horizontally formed side horizontal groove 20. One end of the flipping transfer block 10 is horizontally fixedly provided with a drive locking block 21. The top of the top locking block 19 is engaged with the inner edge of the bottom horizontal groove 17, and the side screw hole is threadedly connected to the outer edge of the transmission screw 18.The bottom of the drive block 21 is provided with a drive wheel structure, and the drive block 21 is horizontally engaged with the inner side of the side horizontal groove 20. The inner side of the main intermediate layer 11 is provided with a protective coating 22, and the inner wall of the main intermediate layer 11 is fixedly provided with a working layer 23.

[0029] The working layer 23 within the main intermediate layer 11 is filled with phase change energy storage material, which can automatically undergo phase change according to changes in the tundish temperature. When the tundish temperature rises, the phase change energy storage material absorbs heat and changes from solid to liquid, effectively preventing the tundish temperature from becoming too high; when the temperature drops, the phase change energy storage material releases heat and changes from liquid back to solid, preventing the tundish temperature from becoming too low.

[0030] Working Principle: The mainboard 1 serves as the supporting foundation for the overall structure, and the steering motor 2, fixedly positioned at the center of its top surface, is the key driving component. When the overall direction needs to be adjusted, the steering motor 2 is activated, which drives the connected fixed chassis 3 to rotate. Since the fixed chassis 3 and the rotating chassis 4 are connected by a top locking block 14 engaged in the bottom locking hole 13, the rotating chassis 4 also rotates accordingly. As the transmission screw 18 rotates, the top locking block 19 moves horizontally within the bottom horizontal groove 17, thereby driving the telescopic upright 7 to move horizontally. The bottom connecting rod 8, which is vertically fixed at the bottom end of the telescopic upright 7, is U-shaped. The horizontal connecting rod 9 is connected to the bottom end of the bottom connecting rod 8. Under the combined action of the flipping motor and the drive locking block 21, the flipping transfer block 10 achieves the flipping action. The two sides of the main intermediate layer 11 are connected to the sides of the flipping block 10 via shafts. As the flipping block 10 flips, the main intermediate layer 11 also flips, opening or closing the opening to facilitate the filling or removal of phase change energy storage materials. The protective coating 22 on the inner side of the main intermediate layer 11 serves to protect it from corrosion and other damage caused by the phase change energy storage materials. The working layer 23, fixedly installed on the inner wall of the main intermediate layer 11, is the key area where the phase change energy storage materials function. Within the working layer 23, the phase change energy storage materials absorb or release heat through a phase change process, thereby controlling the temperature of the tundish.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A working layer of intermediate package based on temperature control structure of phase change energy storage material, including mounting motherboard (1), characterized in that: A steering motor (2) is fixedly installed on the top surface of the mounting motherboard (1). A fixed chassis (3) is horizontally fixedly installed on the bottom surface of the mounting motherboard (1). A rotating chassis (4) is horizontally connected to the bottom surface of the fixed chassis (3). An extension rod (5) is horizontally symmetrically arranged on the bottom surface of the rotating chassis (4). An end motor (6) is fixedly installed at one end of the extension rod (5). A telescopic upright (7) is vertically connected to the bottom surface of the extension rod (5). A bottom connecting rod (8) is vertically fixedly installed at the bottom end of the telescopic upright (7). A horizontal connecting rod (9) is horizontally fixedly installed on one side of the bottom connecting rod (8). A flipping transfer block (10) is horizontally connected to one side of the horizontal connecting rod (9). A main intermediate layer (11) is horizontally arranged between the flipping transfer blocks (10). A mounting slot (12) is horizontally symmetrically opened on the bottom surface of the rotating chassis (4). A bottom locking hole (13) is provided at the center of the bottom surface of the chassis (3). A top locking block (14) is fixedly provided at the center of the top surface of the rotating chassis (4). Fixed through holes (15) are evenly provided on the top surface of the rotating chassis (4). An installation clip (16) is horizontally welded to the top surface of the extension rod (5). A bottom horizontal groove (17) is horizontally provided on the bottom surface of the extension rod (5). A transmission screw (18) is horizontally inserted into the inner side of the bottom horizontal groove (17). A top locking block (19) is fixedly provided at the top of the telescopic pole (7). A side horizontal groove (20) is horizontally provided on one side of the horizontal connecting rod (9). A drive locking block (21) is horizontally fixed at one end of the flipping transfer block (10). A protective coating (22) is provided on the inner side of the main intermediate layer (11). A working layer (23) is fixedly provided on the inner wall of the main intermediate layer (11).

2. The intermediate liner working layer based on the temperature control structure of phase change energy storage material according to claim 1, characterized in that: The steering motor (2) is fixedly installed at the center of the top surface of the mounting motherboard (1), and the top surface of the mounting motherboard (1) is evenly provided with through holes near the edge. The fixed chassis (3) is fixedly connected to the center of the bottom surface of the mounting motherboard (1), and the top surface of the rotating chassis (4) is connected to the bottom opening end of the bottom card hole (13).

3. The intermediate liner working layer based on the temperature control structure of phase change energy storage material according to claim 1, characterized in that: There are two extension rods (5), and the top surfaces of the two extension rods (5) are horizontally connected and set at the bottom opening end of the mounting slot (12). The output end of the end motor (6) is horizontally extended and fixedly connected to one end of the transmission screw (18). The telescopic uprights (7) are arranged in pairs and parallel to each other at the bottom surface of the extension rods (5).

4. The intermediate liner working layer based on the temperature control structure of phase change energy storage material according to claim 1, characterized in that: The bottom connecting rod (8) is U-shaped. The side of the horizontal connecting rod (9) is connected to the bottom side of the bottom connecting rod (8). The inner side of the flipping transfer block (10) is provided with a flipping motor structure. One end of the flipping transfer block (10) is horizontally connected to the side opening end of the side horizontal groove (20). The two sides of the main intermediate layer (11) are connected to the side of the flipping transfer block (10) through the shaft. The top surface of the main intermediate layer (11) is open. The mounting slot (12) is horizontally symmetrically opened at both ends of the bottom diameter line of the rotating chassis (4). One end of the mounting slot (12) is open.

5. The intermediate liner working layer based on the temperature control structure of phase change energy storage material according to claim 1, characterized in that: The top of the top card block (14) is snapped into the inner side of the bottom card hole (13), and the bottom of the fixed through hole (15) extends to the inner side of the mounting slot (12) to maintain communication. The mounting strip (16) is horizontally fixed at the end of the top surface of the extension rod (5) away from the end motor (6), and the mounting strip (16) is horizontally snapped into the inner side of the mounting slot (12).

6. The intermediate liner working layer based on the temperature control structure of phase change energy storage material according to claim 1, characterized in that: The top of the top locking block (19) is locked to the inner side of the bottom horizontal groove (17), and the side screw hole is threaded to the outer side of the transmission screw (18). The bottom of the drive locking block (21) is provided with a drive wheel structure, and the drive locking block (21) is horizontally locked to the inner side of the side horizontal groove (20).

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