A composite heat dissipation device of a stepping motor driving module for high temperature logging

Abstract

The utility model relates to the field of step -by -step drive module, concretely is a kind of composite heat sink of step motor drive module for high temperature well logging, including step driver, several heat dissipation fins are fixedly connected in step driver side, support plate is fixedly connected in both sides of step driver, rotating groove is set up in support plate side, hollow cylinder is also set in both sides of step driver, further include elastic clamping mechanism, initiative heat dissipation mechanism, dustproof mechanism and air supply mechanism. The patent is sent air to the converging box by two fan bodies, and makes two air currents form convection air in hollow pipe, at this time, cooperate two groups of air outlet holes, it is convenient to blow airflow to the root of heat dissipation fin, to heat dissipation fin root in this way is heat dissipated, and the heat conduction of composite heat dissipation fin to step driver, in this way, it is convenient to improve the heat dissipation efficiency of step driver, and by filter screen plate, it is convenient to filter the air inhaled by fan body, avoid dust to be inhaled in hollow cylinder interior.

Description

Technical Field

[0001] This utility model relates to the field of stepper drive modules, specifically a composite heat dissipation device for a stepper motor drive module used in high-temperature well logging. Background Technology

[0002] High-temperature logging stepper motors are mainly used in drilling operations in the oil and gas industries. They can operate stably in harsh environments such as high temperature and high pressure. In logging instruments, it is necessary to conduct all-round detection or measurement of the formation downhole. The stepper motor can drive the instrument's probe or sensor to automatically rotate and locate in real time within a 360-degree range around the horizontal well. When it rotates to the specified perforation azimuth angle, it can perform precise measurement and positioning. Usually, a stepper driver needs to be installed to ensure the normal use of the stepper motor.

[0003] However, in the existing heat dissipation devices for stepper motor drive modules used in high-temperature logging, the heat dissipation of the stepper driver usually relies on heat sink fins and natural wind for passive heat dissipation. Due to the lack of a mechanism that can cooperate with the heat sink fins to dissipate heat from the stepper driver, the roots of the heat sink fins and the stepper driver are located at four corners. Natural wind cannot fully assist the heat sink fins in heat dissipation, resulting in high temperatures at the roots of the heat sink fins, which affects the heat dissipation of the stepper driver. Utility Model Content

[0004] This utility model aims to provide a composite heat dissipation device for a stepper motor drive module used in high-temperature well logging. It is mainly used to solve the problem that the existing technology lacks a mechanism that can cooperate with the heat dissipation fins to dissipate heat from the stepper driver. This results in the heat dissipation fins being located at four corners at the base of the connection between the heat dissipation fins and the stepper driver, making it difficult for natural wind to fully assist the heat dissipation fins in heat dissipation. Consequently, the temperature at the base of the heat dissipation fins is high, which affects the heat dissipation technology of the stepper driver.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A composite heat dissipation device for a stepper motor drive module used in high-temperature well logging includes a stepper driver. Several heat dissipation fins are fixedly connected to one side of the stepper driver. Support plates are fixedly connected to both sides of the stepper driver. A rotating groove is formed on one side of each support plate. Hollow cylinders are provided on both sides of the stepper driver. The device also includes an elastic snap-fit ​​mechanism, an active heat dissipation mechanism, a dustproof mechanism, and an air supply mechanism. The elastic snap-fit ​​mechanism is located on one side of the support plate, and a first insert is provided on one side of the support plate. A first snap-fit ​​member is provided on the outer wall of the hollow cylinder, and the first insert and the first snap-fit ​​member are interlocked. The active heat dissipation mechanism is located inside the hollow cylinder, and the dustproof mechanism is located on one side of the hollow cylinder, with the active heat dissipation mechanism positioned within the dustproof mechanism. Inside the mechanism, a second snap-fit ​​component is provided on the outside of the dustproof mechanism, and a second insert is provided on the outer wall of the hollow cylinder. The second snap-fit ​​component and the second insert are plugged in. A limiting component is rotatably connected to one side of the outer wall of the hollow cylinder. The limiting component is rotatably plugged in with the first insert and the first snap-fit ​​component, and the limiting component is rotatably plugged in with the second snap-fit ​​component and the second insert. The outer wall of the limiting component is plugged in with the elastic snap-fit ​​mechanism. The outer wall of the limiting component passes through the rotating groove. The air supply mechanism is located inside the heat dissipation fins, and both ends of the air supply mechanism pass through the heat dissipation fins. Both ends of the air supply mechanism are connected to the two hollow cylinders respectively, and the air supply mechanism communicates with the inside of the hollow cylinders. The bottom of the air supply mechanism communicates with the inside of the heat dissipation fins.

[0006] The working principle and beneficial effects of this utility model: 1. Working Principle: Two active cooling mechanisms guide two streams of external air into the two ends of the air supply mechanism. Since the air supply mechanism is located within the heat dissipation fins, and its bottom is connected to the fins, this facilitates convection between the two airflows. The airflow is then directed towards the base of the heat dissipation fins for cooling, and the combined effect of the fins and the heat dissipation fins on the stepper driver improves its cooling efficiency. A dustproof mechanism filters the air drawn in by the active cooling mechanism, preventing dust from being drawn into the hollow cylinder. The stepper driver is further cooled by an elastic mechanism that pulls the air outwards. The snap-fit ​​mechanism separates the elastic snap-fit ​​mechanism from the limiting member, releasing the restriction on the limiting member. Then, the limiting member is rotated clockwise, causing one end of the limiting member to separate from the second snap-fit ​​member and the second insert, and simultaneously from the first insert and the first snap-fit ​​member. This releases the restriction on the dustproof mechanism and the hollow cylinder, allowing the dustproof mechanism to separate the second snap-fit ​​member from the second insert, thus disassembling the dustproof mechanism. Similarly, the hollow cylinder causes the first snap-fit ​​member to separate from the first insert, thus disassembling the hollow cylinder. Pulling the hollow cylinder allows the air supply mechanism to be disassembled, facilitating the cleaning of the heat conduction mechanism and the dustproof mechanism by the staff.

[0007] 2. Beneficial effects: (1) Two fan bodies send air into the collection box, and the two air streams form convection air inside the hollow tube. At this time, with two sets of air outlets, it is easy to blow the airflow to the root of the heat dissipation fins, thereby dissipating heat at the root of the heat dissipation fins. The heat dissipation fins then conduct heat to the stepper driver, thereby improving the heat dissipation efficiency of the stepper driver. The filter screen facilitates the filtration of the air drawn in by the fan body, preventing dust from being drawn into the hollow tube.

[0008] (2) The moving rod can be separated from the positioning hole by the tension spring, thereby releasing the restriction on the rotating ring. Then, the rotating ring is rotated clockwise, so that the rotating ring drives several locking blocks to separate from the third positioning groove and the second positioning groove and the first positioning groove and the fourth positioning groove respectively. This facilitates the simultaneous release of the restriction on the dustproof mesh plate and the hollow cylinder, and makes it easy to pull the hollow cylinder upward, so that the hollow cylinder drives the second connecting block to separate from the first placement groove. Thus, the two hollow cylinders drive several hollow tubes to separate from the heat dissipation fins, and pull the filter plate to the outside of the stepper driver, so that the filter plate drives the second placement groove at one end of the support block to separate from the first connecting block. This facilitates the disassembly of the filter plate, making it convenient for the staff to clean the hollow tubes and the filter plate later.

[0009] Preferably, the elastic locking mechanism includes a moving rod, a connecting plate, and a tension spring. A placement plate is fixedly connected to one side of the placement plate. The outer wall of the moving rod slides through both sides of the placement plate. A connecting plate is fixedly connected to one end of the moving rod. A tension spring is sleeved on the outer wall of the moving rod. One end of the tension spring is fixedly connected to one side of the connecting plate, and the other end is fixedly connected to one side of the placement plate. Pulling the connecting plate causes the connecting plate to move the moving rod closer to the outside of the stepper driver. At this time, the tension spring is stretched, thereby separating one end of the moving rod from the limiting member, thus releasing the restriction on the limiting member.

[0010] Preferably, the first insert includes a first placement groove and a first positioning groove. The first placement groove is formed at one end of the support plate, and the first positioning groove is formed on both sides of the support plate. The first positioning groove is connected to the first placement groove. When the limiting member rotates, one end of the limiting member can be separated from the first positioning groove and the first snap-fit ​​member, thereby releasing the restriction on the hollow cylinder.

[0011] Preferably, the active heat dissipation mechanism includes a fan body, which is installed inside the hollow cylinder; through the fan body, external air can be drawn into the hollow cylinder and introduced into the air supply mechanism.

[0012] Preferably, the dustproof mechanism includes a filter screen, which is disposed on one side of the hollow cylinder; due to the function of the filter screen, it is convenient to filter the air drawn in by the fan body and prevent dust from being drawn into the hollow cylinder.

[0013] Preferably, the first snap-fit ​​component includes a second connecting block and a fourth positioning groove. One side of the second connecting block is fixedly connected to the outer wall of the hollow cylinder, and the second connecting block corresponds to the interior of the first insert. The top and bottom ends of the second connecting block are provided with the same fourth positioning groove. In the initial state, the second connecting block is embedded in the first placement groove, and the first positioning groove is aligned with the fourth positioning groove.

[0014] Preferably, the second snap-fit ​​component includes a support block, a second placement groove, and a third positioning groove. Two support blocks are provided, and one side of each support block is fixedly connected to the outer wall of the filter screen. One end of each support block has a second placement groove, and both sides of each support block have the same third positioning groove. When the limiting component rotates, one end of the limiting component can be separated from the third positioning groove and the second insert, thereby releasing the restriction on the filter screen.

[0015] Preferably, the second insert includes a first connecting block and a second positioning groove. There are two first connecting blocks. One side of each first connecting block is fixedly connected to the outer wall of the hollow cylinder, and the two first connecting blocks are arranged symmetrically in a circular array. The same second positioning groove is opened on both sides of the first connecting block. In the initial state, the second placement groove at one end of the support block is sleeved on the outside of the first connecting block, and the third positioning groove is aligned with the second positioning groove.

[0016] Preferably, the limiting component includes a rotating ring, an extension block, a snap-fit ​​block, an extension plate, and a positioning hole. The rotating ring is rotatably connected to the outer wall of the hollow cylinder. One end of the rotating ring is fixedly connected to several extension blocks, which are arranged in a circular array at equal intervals. One side of each extension block is fixedly connected to a snap-fit ​​block, which is also arranged in a circular array at equal intervals. The extension blocks and snap-fit ​​blocks are spaced apart from the outer wall of the hollow cylinder. An extension plate is fixedly connected to the outer wall of the rotating ring, and the same positioning hole is provided on both sides of the extension plate. The outer wall of the positioning rod passes through the positioning hole. In the initial state, due to the force of the tension spring, the tension spring drives the connecting plate to move, and the connecting plate drives the moving rod to move towards the filter screen plate, so that the moving rod passes through the positioning hole, thereby limiting the position of the rotating ring.

[0017] Preferably, the air supply mechanism includes a converging box, a hollow tube, and air outlets. Two converging boxes are provided, with one end of each box fixedly connected to one side of two hollow cylinders. Several hollow tubes are fixedly connected between the two converging boxes, passing through adjacent heat dissipation fins. Two sets of air outlets are provided at the bottom of the inner wall of each hollow tube, arranged symmetrically, with each set penetrating the outer wall of the hollow tube. When the two fan bodies are activated, they respectively supply air to the two converging boxes through the two hollow cylinders, and deliver two streams of air from the two converging boxes to both ends of the hollow tubes, causing the two streams of air to form convection air inside the hollow tubes. The airflow is then discharged from the two sets of air outlets, facilitating the airflow to be blown towards the base of the heat dissipation fins, thereby dissipating heat at the base of the heat dissipation fins. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a composite heat dissipation device for a stepper motor drive module used in high-temperature well logging, which is part of this utility model patent. Figure 2 This utility model patent shows a heat dissipation fin structure diagram of a composite heat dissipation device for a stepper motor drive module used in high-temperature well logging. Figure 3 Exploded view of the hollow cylinder and dustproof mesh plate of a composite heat dissipation device for a stepper motor drive module for high-temperature well logging, which is the subject of this utility model patent. Figure 4 Exploded view of the hollow cylinder and support plate of a composite heat dissipation device for a stepper motor drive module for high-temperature logging, which is the subject of this utility model patent. Figure 5 Exploded view of the hollow cylinder and rotating ring of a composite heat dissipation device for a stepper motor drive module for high-temperature logging, which is the subject of this utility model patent. Figure 6 This utility model patent shows a structural diagram of a composite heat dissipation device for a stepper motor drive module used in high-temperature well logging, which is a junction box structure. Figure 7 This utility model patent shows a hollow tube structure diagram of a composite heat dissipation device for a stepper motor drive module used in high-temperature well logging.

[0019] The reference numerals in the accompanying drawings include: 1. Stepper driver; 2. Heat sink fins; 3. Support plate; 4. First placement slot; 5. First positioning slot; 6. Placement plate; 7. Moving rod; 8. Connecting plate; 9. Tension spring; 10. Rotating slot; 11. Hollow cylinder; 12. First connecting block; 13. Second positioning slot; 14. Filter plate; 15. Support block; 16. Second placement slot; 17. Third positioning slot; 18. Fan body; 19. Rotating ring; 20. Extension block; 21. Snap-fit ​​block; 22. Extension plate; 23. Positioning hole; 24. Converging box; 25. Hollow tube; 26. Air outlet; 27. Second connecting block; 28. Fourth positioning slot. 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] like Figures 1-7As shown, the device includes a stepper driver 1, with several heat dissipation fins 2 fixedly connected to one side of the stepper driver 1. Support plates 3 are fixedly connected to both sides of the stepper driver 1. A rotating groove 10 is provided on one side of each support plate 3. Hollow cylinders 11 are provided on both sides of the stepper driver 1. The device also includes an elastic locking mechanism, an active cooling mechanism, a dustproof mechanism, and an air supply mechanism. The elastic locking mechanism is located on one side of the support plate 3 and includes a moving rod 7, a connecting plate 8, and a tension spring 9. A placement plate 6 is fixedly connected to one side of the support plate 3. The outer wall of the moving rod 7 slides through both sides of the placement plate 6. One end of the moving rod 7 is fixedly connected to the connecting plate 8, and a tension spring 9 is sleeved on the outer wall of the moving rod 7. One end of the tension spring 9 is fixedly connected to one side of the connecting plate 8, and the other end is fixedly connected to one side of the placement plate 6. A first insert is provided on one side of the plate 3. The first insert includes a first placement groove 4 and a first positioning groove 5. The first placement groove 4 is opened at one end of the support plate 3. The first positioning grooves 5 are opened on both sides of the support plate 3, and the first positioning grooves 5 are connected to the first placement groove 4. A first snap-fit ​​is provided on the outer wall of the hollow cylinder 11. The first snap-fit ​​includes a second connecting block 27 and a fourth positioning groove 28. One side of the second connecting block 27 is fixedly connected to the outer wall of the hollow cylinder 11, and the second connecting block 27 corresponds to the inside of the first insert. The top and bottom ends of the second connecting block 27 are provided with the same fourth positioning groove 28. The first insert and the first snap-fit ​​are plugged into each other. An active heat dissipation mechanism is provided inside the hollow cylinder 11. The active heat dissipation mechanism includes a fan body 18, which is installed in the hollow cylinder 11. Inside the core cylinder 11, a dustproof mechanism is located on one side of the hollow cylinder 11. The dustproof mechanism includes a filter screen 14, which is located on one side of the hollow cylinder 11. The active heat dissipation mechanism is located inside the dustproof mechanism. A second snap-fit ​​component is provided on the outside of the dustproof mechanism. The second snap-fit ​​component includes a support block 15, a second placement groove 16, and a third positioning groove 17. Two support blocks 15 are provided, and one side of each support block 15 is fixedly connected to the outer wall of the filter screen 14. One end of each support block 15 has a second placement groove 16, and both sides of each support block 15 have the same third positioning groove 17. A second insert is provided on the outer wall of the hollow cylinder 11. The second insert includes a first connecting block 12 and a second positioning groove 13. Two first connecting blocks 12 are provided. One side is fixedly connected to the outer wall of the hollow cylinder 11, and two first connecting blocks 12 are symmetrically arranged in a ring array. The same second positioning groove 13 is opened on both sides of the first connecting block 12. The second snap-fit ​​member and the second insert member are inserted into each other. A limiting member is rotatably connected to one side of the outer wall of the hollow cylinder 11. The limiting member includes a rotating ring 19, an extension block 20, a snap-fit ​​block 21, an extension plate 22, and a positioning hole 23. The rotating ring 19 is rotatably connected to the outer wall of the hollow cylinder 11. Several extension blocks 20 are fixedly connected to one end of the rotating ring 19. The several extension blocks 20 are arranged in a ring array at equal intervals. Snap-fit ​​blocks 21 are fixedly connected to one side of the several extension blocks 20. The several snap-fit ​​blocks 21 are arranged in a ring array at equal intervals. There is a gap between the extension blocks 20 and the snap-fit ​​blocks 21 and the outer wall of the hollow cylinder 11.An extension plate 22 is fixedly connected to the outer wall of the rotating ring 19. The extension plate 22 has the same positioning hole 23 on both sides. The limiting member is rotatably connected to the first insert and the first snap-fit ​​member, and is also rotatably connected to the second snap-fit ​​member and the second insert. The outer wall of the limiting member is connected to the elastic snap-fit ​​mechanism. The outer wall of the limiting member passes through the rotating groove 10. Pulling the connecting plate 8 causes the connecting plate 8 to move the moving rod 7 towards the outside of the stepper driver 1. At this time, the tension spring 9 is stretched, thus separating one end of the moving rod 7 from the positioning hole 23, thereby releasing the restriction on the rotating ring 19. Subsequently, the rotating ring 19 is rotated clockwise, and the outer wall of the rotating ring 19 passes through the rotating groove 10. The rotating ring 19 also drives several extension blocks 20 and snap-fit ​​members. When block 21 rotates, several locking blocks 21 separate from the third positioning groove 17 and the second positioning groove 13, and from the first positioning groove 5 and the fourth positioning groove 28, respectively. This facilitates the simultaneous release of the restrictions on the dustproof mesh plate and the hollow cylinder 11, allowing the hollow cylinder 11 to be pulled upwards. This causes the hollow cylinder 11 to pull the second connecting block 27 away from the first placement groove 4, thereby causing the two hollow cylinders 11 to pull several hollow tubes 25 away from the heat dissipation fins 2, and pull the filter plate 14 outwards towards the stepper driver 1. This causes the filter plate 14 to pull the second placement groove 16 at one end of the support block 15 away from the first connecting block 12, thus facilitating the disassembly of the filter plate 14 and making it easier for staff to clean the hollow tubes 25 and the filter plate 14 subsequently. The air supply mechanism is housed within the heat dissipation fins 2, with both ends passing through the fins 2. Each end of the air supply mechanism is connected to two hollow cylinders 11. The air supply mechanism includes a converging box 24, hollow tubes 25, and air outlets 26. Two converging boxes 24 are provided, each fixedly connected at one end to one side of a hollow cylinder 11. Several hollow tubes 25 are fixedly connected between the two converging boxes 24, passing through adjacent heat dissipation fins 2. Two sets of air outlets 26 are symmetrically arranged at the bottom of the inner wall of each hollow tube 25, and each set of air outlets 26 penetrates the outer wall of the hollow tube 25. The air supply mechanism communicates with the interior of the hollow cylinder 11. The bottom of the air supply mechanism is connected to the heat dissipation fins 11. The heat sink fins 2 are internally connected; the two fan bodies 18 are started, so that the two fan bodies 18 respectively send air through the two hollow cylinders 11 to the two converging boxes 24, and send the two airflows from the two converging boxes 24 to both ends of the hollow tube 25, so that the two airflows form convection air inside the hollow tube 25. Then the airflow is discharged from the two sets of air outlets 26, which facilitates blowing the airflow to the root of the heat sink fins 2, thereby dissipating heat from the root of the heat sink fins 2. Combined with the heat conduction of the heat sink fins 2 to the stepper driver 1, this facilitates the improvement of the heat dissipation efficiency of the stepper driver 1. During this process, due to the function of the filter plate 14, the air drawn in by the fan body 18 is easily filtered to prevent dust from being drawn into the hollow cylinder 11.

[0022] As can be seen from the above, the specific implementation of this utility model is as follows: In the initial state, due to the force of the tension spring 9, the tension spring 9 drives the connecting plate 8 to move, and the connecting plate 8 drives the moving rod 7 to move towards the filter screen plate 14. Thus, the moving rod 7 passes through the positioning hole 23, so that the moving rod 7 restricts the position of the rotating ring 19. The second connecting block 27 is embedded in the first placement groove 4, and the first positioning groove 5 is aligned with the fourth positioning groove 28. The second placement groove 16 at one end of the support block 15 is sleeved on the outside of the first connecting block 12, and the third positioning groove 17 is aligned with the second positioning groove 13. Several snap-fit ​​blocks 21 on one side of the rotating ring 19 pass through the third positioning groove 17 and the second positioning groove 13 and the first positioning groove 5 and the fourth positioning groove 28 respectively, thereby restricting the position of the hollow cylinder 11 and the filter screen plate 14. At this time, several hollow tubes 25 are located between adjacent heat dissipation fins 2, and the hollow tubes 25 do not contact the heat dissipation fins 2. The two fan bodies 18 are started, so that the two fan bodies 18 respectively send air into the two converging boxes 24 through the two hollow cylinders 11, and deliver the two airflows from the two converging boxes 24 to both ends of the hollow tube 25, so that the two airflows form convection air inside the hollow tube 25. Then the airflow is discharged from the two sets of air outlets 26, which facilitates blowing the airflow towards the root of the heat dissipation fins 2, thereby dissipating heat from the root of the heat dissipation fins 2. Combined with the heat conduction of the heat dissipation fins 2 to the stepper driver 1, this facilitates the improvement of the heat dissipation efficiency of the stepper driver 1. During this process, due to the function of the filter plate 14, the air drawn in by the fan body 18 is filtered to prevent dust from being drawn into the hollow cylinder 11. Additionally, pulling the connecting plate 8 causes the moving rod 7 to move closer to the outside of the stepper driver 1. At this time, the tension spring 9 is stretched, causing one end of the moving rod 7 to separate from the positioning hole 23, thereby releasing the restriction on the rotating ring 19. Then, the rotating ring 19 is rotated clockwise, and the outer wall of the rotating ring 19 passes through the rotating groove 10. The rotating ring 19 also drives several extension blocks 20 and snap-fit ​​blocks 21 to rotate. At this time, the snap-fit ​​blocks 21 separate from the third positioning groove 17 and the second positioning groove 13, and from the first positioning groove 5 and the fourth positioning groove 28, respectively, thus facilitating simultaneous... By removing the restrictions on the dustproof mesh plate and hollow cylinder 11, it is easy to pull the hollow cylinder 11 upwards, causing the hollow cylinder 11 to separate the second connecting block 27 from the first placement slot 4. This allows the two hollow cylinders 11 to separate several hollow tubes 25 from the heat dissipation fins 2, and pull the filter plate 14 outwards towards the stepper driver 1. This causes the filter plate 14 to separate the second placement slot 16 at one end of the support block 15 from the first connecting block 12, thus facilitating the disassembly of the filter plate 14 and making it easier for staff to clean the hollow tubes 25 and the filter plate 14 subsequently.

[0023] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A composite heat sink for a stepper motor drive module for high temperature logging, characterized in that, The device includes a stepper driver (1), with several heat dissipation fins (2) fixedly connected to one side of the stepper driver (1), and support plates (3) fixedly connected to both sides of the stepper driver (1). A rotating groove (10) is provided on one side of the support plate (3), and hollow cylinders (11) are provided on both sides of the stepper driver (1). The device also includes an elastic snap-fit ​​mechanism, an active heat dissipation mechanism, a dustproof mechanism, and an air supply mechanism. The elastic snap-fit ​​mechanism is located on one side of the support plate (3), and a first insert is provided on one side of the support plate (3). A first snap-fit ​​is provided on the outer wall of the hollow cylinder (11), and the first insert and the first snap-fit ​​are plugged into each other. The active heat dissipation mechanism is located inside the hollow cylinder (11), and the dustproof mechanism is located on one side of the hollow cylinder (11), with the active heat dissipation mechanism located within the dustproof mechanism. On the inner side, a second snap-fit ​​is provided on the outer side of the dustproof mechanism. A second insert is provided on the outer wall of the hollow cylinder (11). The second snap-fit ​​and the second insert are plugged in. A limiting member is rotatably connected to one side of the outer wall of the hollow cylinder (11). The limiting member is rotatably plugged in with the first insert and the first snap-fit. The limiting member is rotatably plugged in with the second snap-fit ​​and the second insert. The outer wall of the limiting member is plugged in with the elastic snap-fit ​​mechanism. The outer wall of the limiting member passes through the rotating groove (10). The air supply mechanism is located inside the heat dissipation fins (2). Both ends of the air supply mechanism pass through the heat dissipation fins (2). Both ends of the air supply mechanism are connected to the two hollow cylinders (11) respectively. The air supply mechanism is connected to the inside of the hollow cylinder (11). The bottom of the air supply mechanism is connected to the inside of the heat dissipation fins (2).

2. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 1, characterized in that: The elastic snap-fit ​​mechanism includes a moving rod (7), a connecting plate (8), and a tension spring (9). A placement plate (6) is fixedly connected to one side of the support plate (3). The outer wall of the moving rod (7) slides through both sides of the placement plate (6). One end of the moving rod (7) is fixedly connected to the connecting plate (8). A tension spring (9) is sleeved on the outer wall of the moving rod (7). One end of the tension spring (9) is fixedly connected to one side of the connecting plate (8), and the other end is fixedly connected to one side of the placement plate (6).

3. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 2, characterized in that: The first insert includes a first placement groove (4) and a first positioning groove (5). The first placement groove (4) is opened at one end of the support plate (3). The first positioning groove (5) is opened on both sides of the support plate (3), and the first positioning groove (5) is connected to the first placement groove (4).

4. The composite heat sink of the stepper motor driving module for high temperature logging of claim 1, wherein: The active heat dissipation mechanism includes a fan body (18), which is installed inside the hollow cylinder (11).

5. The composite heat sink of the stepping motor driving module for high temperature logging of claim 1, wherein: The dustproof mechanism includes a filter screen (14), which is disposed on one side of the hollow cylinder (11).

6. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 1, wherein: The first snap-fit ​​component includes a second connecting block (27) and a fourth positioning groove (28). One side of the second connecting block (27) is fixedly connected to the outer wall of the hollow cylinder (11), and the second connecting block (27) corresponds to the interior of the first insert. The top and bottom ends of the second connecting block (27) are provided with the same fourth positioning groove (28).

7. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 5, characterized in that: The second snap-fit ​​component includes a support block (15), a second placement groove (16), and a third positioning groove (17). There are two support blocks (15), and one side of each support block (15) is fixedly connected to the outer wall of the filter screen (14). The second placement groove (16) is opened at one end of the support block (15), and the same third positioning groove (17) is opened on both sides of the support block (15).

8. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 1, wherein: The second insert includes a first connecting block (12) and a second positioning groove (13). There are two first connecting blocks (12). One side of each first connecting block (12) is fixedly connected to the outer wall of the hollow cylinder (11), and the two first connecting blocks (12) are arranged in a circular array symmetrically. The same second positioning groove (13) is opened on both sides of the first connecting block (12).

9. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 1, wherein: The limiting components include a rotating ring (19), an extension block (20), a snap-fit ​​block (21), an extension plate (22), and a positioning hole (23). The rotating ring (19) is rotatably connected to the outer wall of the hollow cylinder (11). One end of the rotating ring (19) is fixedly connected to several extension blocks (20), which are arranged in a circular array at equal intervals. One side of each extension block (20) is fixedly connected to a snap-fit ​​block (21), which are arranged in a circular array at equal intervals. The extension blocks (20) and snap-fit ​​blocks (21) are spaced apart from the outer wall of the hollow cylinder (11). The outer wall of the rotating ring (19) is fixedly connected to an extension plate (22), which has the same positioning hole (23) on both sides.

10. The composite heat sink of a stepper motor driving module for high temperature logging according to claim 1, wherein: The air supply mechanism includes a converging box (24), a hollow tube (25), and an air outlet (26). There are two converging boxes (24). One end of each of the two converging boxes (24) is fixedly connected to one side of two hollow cylinders (11). Several hollow tubes (25) are fixedly connected between the two converging boxes (24). Several hollow tubes (25) pass through the adjacent heat dissipation fins (2). Two sets of air outlets (26) are opened at the bottom of the inner wall of the hollow tube (25). The two sets of air outlets (26) are symmetrically arranged, and each set of air outlets (26) penetrates the outer wall of the hollow tube (25).

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