A large-scale wind turbine planetary carrier casting equipment

Abstract

This invention discloses a large-scale wind turbine planetary carrier casting molding equipment, belonging to the field of wind turbine planetary carrier casting technology. It includes a base plate, with a lower mold fixedly connected to the upper surface of the base plate. An upper mold is connected to the upper surface of the lower mold via an electric slide rail, and a water tank is fixedly connected to the upper surface of the base plate. In operation, the large-scale wind turbine planetary carrier casting molding equipment pours molten metal into the molding chamber of the lower mold through a feed pipe on the surface of the upper mold. At this time, a pump is started, causing coolant to flow between the heat dissipation circulation pipe and the water tank, rapidly cooling the molten metal inside the lower mold and improving work efficiency. During the operation of the lower mold, the movable frame and connecting plate reciprocate linearly in the horizontal direction. The movable frame and through-holes agitate the coolant, rapidly dissipating heat. Finally, the heat is discharged by the heat dissipation plate and fins, optimizing the cooling effect.

Description

Technical Field

[0001] This invention relates to the field of wind turbine planetary carrier casting technology, specifically to a large-scale wind turbine planetary carrier casting molding equipment. Background Technology

[0002] Large wind turbine planetary carriers serve to support and stabilize the planetary gear train during use, while also transmitting torque and balancing loads. The casting process for wind turbine planetary carriers requires casting equipment. This equipment pours molten metal into a pre-made mold cavity, cools, and then removes the workpiece. However, the slow cooling rate during mold operation can affect the microstructure of the casting and reduce its strength. To accelerate cooling, prior art 1 (Chinese patent application No. 202311282899.6, filed on 2023-10-07) describes a vertical-line planetary carrier sand casting process. This process offers advantages such as rapid cooling, reduced white cast iron formation, and improved overflow to mitigate white cast iron buildup. Prior art 2 (Chinese patent application No. 201410467551.9, filed on 2014-09-15) further addresses this issue.

[0003] A planetary carrier casting mold and method for a self-elevating offshore platform lifting gearbox is disclosed. During operation, external chillers are added at the rounded corners and bottom of each pin-to-lower flange connection area to intensify cooling in that area, making it the first area to solidify and improving cooling efficiency.

[0004] During the casting process, metal shavings or dust may be generated during mold filling or casting cleaning. These impurities may enter the coolant system and mix into it as the coolant circulates. The casting mold in the above application does not have a structure for cleaning coolant impurities during use. As a result, after long-term use, the pipes may become blocked, which is not conducive to subsequent cooling work. Summary of the Invention

[0005] The purpose of this invention is to provide a large-scale wind turbine planetary carrier casting equipment to solve the problem mentioned in the background art that, during use, the equipment lacks a structure for cleaning coolant impurities, which may lead to pipe blockage after prolonged use and hinder subsequent cooling operations.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a large-scale wind turbine planetary carrier casting molding equipment, comprising a base plate, a lower mold fixedly connected to the upper surface of the base plate, an upper mold connected to the upper surface of the lower mold via an electric slide rail, and a water tank fixedly connected to the upper surface of the base plate; a heat dissipation circulation pipe connected inside the lower mold; a connecting plate connected to the inside of the water tank via a reciprocating mechanism, and an activated carbon adsorption plate connected to the inside of the water tank via a reciprocating mechanism; a tank cover movably disposed on the upper surface of the water tank, heat dissipation fins slidably connected inside the tank cover, and a heat dissipation plate fixedly connected to the lower surface of the heat dissipation fins; and a protective plate connected to the surface of the lower mold via a locking mechanism.

[0007] Preferably, a feed pipe is fixedly connected to the upper surface of the upper mold, the left end of the heat dissipation circulation pipe is located inside the water tank, a pump is fixedly connected to the upper surface of the base plate, the input end of the pump is located inside the water tank, and the output end of the pump is fixedly connected to the right side of the heat dissipation circulation pipe, and a liquid inlet pipe is provided on the surface of the upper mold.

[0008] Preferably, the water tank has a connecting shaft rotatably mounted inside, and a water wheel is fixedly connected to the surface of the connecting shaft. The reciprocating mechanism includes a cam fixedly connected to the surface of the connecting shaft, and a movable frame is sleeved and connected to the surface of the cam. A connecting plate is fixedly connected to the lower surface of the movable frame.

[0009] Preferably, a limiting rod is fixedly connected to the inner wall of the water tank, and the surface of the limiting rod is fitted with the connecting plate, and the connecting plates are symmetrically distributed on both sides of the movable frame, and the surface of the connecting plate is provided with through holes at equal intervals.

[0010] Preferably, the reciprocating mechanism includes a push rod fixedly connected to the surface of the connecting plate, a fixing block bolted to the inner wall of the water tank, and a rotating shaft rotatably arranged inside the fixing block, and the activated carbon adsorption plate fixedly connected to the surface of the rotating shaft.

[0011] Preferably, a top rod is inserted into the bottom of the water tank, and the left side of the top rod is an inverted "L" structure. A torsion spring that plays an elastic reset role is fixedly connected to the surface of the rotating shaft, and the other side of the torsion spring is fixedly connected to the inner wall of the fixing block.

[0012] Preferably, the activated carbon adsorption plate is inclined, and the surface of the activated carbon adsorption plate is initially in contact with the surface of the top rod.

[0013] Preferably, the protective plates are symmetrically distributed on both sides of the lower mold.

[0014] Preferably, the locking mechanism includes a support plate fixedly connected to the outer wall of the lower mold, and a locking rod slidably disposed inside the support plate. A long rod is fixedly connected to the outer wall of the lower mold, and a column is fixedly connected to the inner wall of the locking rod. The long rod is sleeved and connected to the surface of the column. An auxiliary spring that plays an elastic restoring role is fixedly connected to the upper surface of the long rod, and the other side of the auxiliary spring is fixedly connected to the inner wall of the locking rod. The outer surface of the locking rod is inclined.

[0015] Preferably, an upward push block is fixedly connected to the upper surface of the movable frame, and an auxiliary block corresponding to the upward push block is fixedly connected to the lower surface of the heat sink. The auxiliary blocks are evenly distributed on the lower surface of the heat sink, and the left and right sides of the auxiliary blocks are inclined to the left and right sides of the upward push block.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: A novel structural design allows for rapid cooling of the lower mold via a heat dissipation circulation pipe. Inside the water tank, a movable frame and connecting plate are installed. When the connecting plate moves, it agitates the coolant, allowing it to absorb heat and dissipate it quickly. Simultaneously, a reciprocating activated carbon adsorption plate adsorbs impurities from the coolant, keeping it clean and preventing pipe blockage. During operation, a protective plate can be connected to isolate the lower mold from the surrounding space, preventing accidents due to excessive heat. The specific details are as follows:

[0017] This large-scale wind turbine planetary carrier casting equipment works by pouring molten metal into the forming chamber of the lower mold through the feed pipe on the surface of the upper mold. At this time, the pump is started, and when the pump is working, the coolant flows between the heat dissipation circulation pipe and the water tank, which quickly cools the molten metal inside the lower mold and improves the working efficiency. During the operation of the lower mold, the movable frame and the connecting plate reciprocate linearly in the horizontal direction. At this time, the movable frame and the through hole agitate the coolant, which quickly dissipates the heat of the coolant. Finally, the heat is discharged by the heat dissipation fins and heat dissipation plates, thus optimizing the cooling effect.

[0018] Furthermore, during the movement of the movable frame, the auxiliary block is intermittently pushed by the push block, so that the heat sink and heat dissipation fins are in a moving state under the push force and their own gravity, so that the heat sink and heat dissipation fins can come into contact with more air, thus optimizing the cooling effect.

[0019] In this large-scale wind turbine planetary carrier casting equipment, when the coolant flows inside the heat dissipation circulation pipe and water tank, the connecting shaft rotates inside the water tank under the action of the coolant and water wheel. At this time, the connecting shaft intermittently pushes the movable frame through the cam, and then the movable frame makes reciprocating linear motion in the horizontal direction under the action of the connecting plate and the limit rod. At this time, the connecting plate and the through hole play a role in disturbing the coolant, so that the heat of the coolant can be quickly discharged, thereby enabling the coolant to better cool the lower mold and improve the cooling efficiency.

[0020] Furthermore, when the connecting plate reciprocates in a linear motion in the horizontal direction, the connecting plate intermittently pushes the activated carbon adsorption plate through the push rod. At this time, the activated carbon adsorption plate and the rotating shaft are in a swinging state inside the water tank under the action of the thrust and torsion spring. At this time, the activated carbon adsorption plate plays the role of adsorbing impurities. After the activated carbon adsorption plate and the fixing block have been used for a long time, the fixing block can be unscrewed and the fixing block and the activated carbon adsorption plate can be replaced to facilitate the use of the activated carbon adsorption plate.

[0021] During operation, when the lower mold needs to be isolated, the protective plate can be attached to the side of the lower mold of this large wind turbine planetary carrier casting equipment. Specifically, the protective plate is first placed on the support plate, and then pushed towards the lower mold. At this time, the protective plate will push the inclined surface of the clamping rod, causing the clamping rod to move in the direction of the compression auxiliary spring. After the surface of the protective plate is in contact with the surface of the lower mold, the clamping rod loses the compression force. At this time, the clamping rod rises under the action of the auxiliary spring, and then the clamping rod holds the protective plate in place. At this time, the surfaces of adjacent protective plates are in contact, so that the protective plates work stably. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection structure between the base plate and the lower mold of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection structure between the base plate and the water tank of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the connecting shaft and the water turbine of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection structure between the connecting shaft and the cam in this invention;

[0026] Figure 5 This is a schematic diagram of the connection structure between the movable frame and the connecting plate of the present invention;

[0027] Figure 6 This is a schematic diagram of the overall structure of the activated carbon adsorption plate of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle;

[0029] Figure 8 This is a schematic diagram of the bonding structure of adjacent protective plates in this invention;

[0030] Figure 9 This is a schematic diagram of the overall structure of the protective plate of the present invention;

[0031] Figure 10 This is a schematic diagram of the connection structure between the box cover and the heat dissipation fins of the present invention;

[0032] Figure 11 This is a schematic diagram of the connection structure between the lower mold and the protective plate of the present invention;

[0033] Figure 12 For the present invention Figure 11 Enlarged structural diagram at point B;

[0034] Figure 13 This is a schematic diagram of the connection structure between the heat sink and the heat sink fins of the present invention;

[0035] Figure 14 For the present invention Figure 13 Enlarged structural diagram at point C.

[0036] In the diagram: 1. Base plate; 2. Lower mold; 3. Upper mold; 4. Pump; 5. Heat dissipation circulation pipe; 6. Water tank; 7. Connecting shaft; 8. Water wheel; 9. Tank cover; 10. Cam; 11. Movable frame; 12. Connecting plate; 13. Limiting rod; 14. Push rod; 15. Fixing block; 16. Rotating shaft; 17. Activated carbon adsorption plate; 18. Through hole; 19. Push rod; 20. Torsion spring; 21. Heat dissipation plate; 22. Protective plate; 23. Upward push block; 24. Heat dissipation fins; 25. Support plate; 26. Long rod; 27. Column; 28. Locking rod; 29. ​​Auxiliary spring; 30. Auxiliary block. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] This invention provides the following technical solution: a large-scale wind turbine planetary carrier casting equipment.

[0039] Example 1: The cooling circulation pipe 5 and pump 4 allow the coolant to quickly remove heat, facilitating cooling of the lower mold 2. Simultaneously, the connecting plate 12 allows heat to be expelled from the coolant. Figures 1-4As shown, the system includes a base plate 1, a lower mold 2 fixedly connected to the upper surface of the base plate 1, an upper mold 3 connected to the upper surface of the lower mold 2 via an electric slide rail, and a water tank 6 fixedly connected to the upper surface of the base plate 1. A heat dissipation circulation pipe 5 is connected inside the lower mold 2. A connecting plate 12 is connected inside the water tank 6 via a reciprocating mechanism. A feed pipe is fixedly connected to the upper surface of the upper mold 3. The left end of the heat dissipation circulation pipe 5 is located inside the water tank 6. A pump 4 is fixedly connected to the upper surface of the base plate 1. The input end of the pump 4 is located inside the water tank 6, and the output end of the pump 4 is fixedly connected to the right side of the heat dissipation circulation pipe 5. An inlet pipe is provided on the surface of the upper mold 3.

[0040] The water tank 6 has a rotating connecting shaft 7 inside, and a water wheel 8 is fixedly connected to the surface of the connecting shaft 7. The reciprocating mechanism includes a cam 10 fixedly connected to the surface of the connecting shaft 7, and a movable frame 11 is sleeved on the surface of the cam 10. A connecting plate 12 is fixedly connected to the lower surface of the movable frame 11. A limit rod 13 is fixedly connected to the inner wall of the water tank 6, and a connecting plate 12 is sleeved on the surface of the limit rod 13. The connecting plates 12 are symmetrically distributed on both sides of the movable frame 11, and through holes 18 are opened at equal intervals on the surface of the connecting plates 12.

[0041] During operation, the operator pours molten metal into the forming cavity of the lower mold 2 through an external feeding device and the feed pipe on the surface of the upper mold 3. Simultaneously, the pump 4 operates, causing the coolant to flow between the heat dissipation circulation pipe 5 and the water tank 6, rapidly cooling the molten metal inside the lower mold 2 and improving work efficiency. While the coolant flows within the heat dissipation circulation pipe 5 and the water tank 6, the connecting shaft 7 rotates inside the water tank 6 under the action of the coolant and the water wheel 8. At this time, the connecting shaft 7 intermittently pushes the movable frame 11 via the cam 10. The movable frame 11 then reciprocates linearly in the horizontal direction under the action of the connecting plate 12 and the limiting rod 13. The connecting plate 12 and the through hole 18 agitate the coolant, allowing the coolant heat to dissipate quickly, thus enabling the coolant to better cool the lower mold 2 and improving cooling efficiency. After the heat is dissipated, it is absorbed by the heat dissipation plate 21 and the heat dissipation fins 24, allowing the heat to be quickly released into the air, rapidly cooling the coolant and optimizing the cooling effect.

[0042] Example 2: Unlike Example 1, the activated carbon adsorption plate 17 can absorb impurities inside the coolant, keeping the coolant clean. Figures 4-7As shown, the reciprocating mechanism includes a push rod 14 fixedly connected to the surface of the connecting plate 12, a fixing block 15 bolted to the inner wall of the water tank 6, and a rotating shaft 16 rotatably mounted inside the fixing block 15. An activated carbon adsorption plate 17 is fixedly connected to the surface of the rotating shaft 16. A top rod 19 is inserted into the bottom of the water tank 6, and the left side of the top rod 19 is an inverted "L" structure. A torsion spring 20, which plays an elastic restoring role, is fixedly connected to the surface of the rotating shaft 16, and the other side of the torsion spring 20 is fixedly connected to the inner wall of the fixing block 15. The activated carbon adsorption plate 17 is connected to the inside of the water tank 6 through the reciprocating mechanism. The activated carbon adsorption plate 17 is inclined, and the surface of the activated carbon adsorption plate 17 is initially in contact with the surface of the top rod 19.

[0043] When the connecting plate 12 reciprocates linearly in the horizontal direction, it intermittently pushes the activated carbon adsorption plate 17 via the push rod 14. As the activated carbon adsorption plate 17 is pushed, it causes the rotating shaft 16 to rotate inside the fixed block 15. At this time, the torsion spring 20 is stretched. When the movable frame 11, the connecting plate 12, and the push rod 14 move back, the activated carbon adsorption plate 17 rotates back under the action of the torsion spring 20 (while the top rod 19 limits the angle of rotation of the activated carbon adsorption plate 17, ensuring stability). This process is repeated, and the activated carbon adsorption plate... Under the thrust of push rod 14 and torsion spring 20, 17 and shaft 16 are in a swinging state inside water tank 6, thus the activated carbon adsorption plate 17 works to stir the coolant. At the same time, the activated carbon adsorption plate 17 also adsorbs impurities, keeping the inside of the coolant clean. The input end of pump 4 is equipped with a filter screen, which also protects the cleanliness of the pipeline. After long-term use, the fixing block 15 and push rod 19 can be directly removed from water tank 6 to clean and replace the activated carbon adsorption plate 17, ensuring the effectiveness of the activated carbon adsorption plate 17.

[0044] Example 3: Unlike Example 2, when using the lower mold 2, it can be isolated from the surrounding space, thus preventing accidental burns. Figures 8-12 As shown, a protective plate 22 is connected to the surface of the lower mold 2 via a locking mechanism. The locking mechanism includes a support plate 25 fixedly connected to the outer wall of the lower mold 2, and a locking rod 28 is slidably arranged inside the support plate 25. A long rod 26 is fixedly connected to the outer wall of the lower mold 2. A column 27 is fixedly connected to the inner wall of the locking rod 28, and the long rod 26 is sleeved and connected to the surface of the column 27. An auxiliary spring 29 that plays an elastic reset role is fixedly connected to the upper surface of the long rod 26, and the other side of the auxiliary spring 29 is fixedly connected to the inner wall of the locking rod 28. The outer surface of the locking rod 28 is inclined.

[0045] During operation, when it is necessary to isolate the lower mold 2, the protective plate 22 can be attached to the side of the lower mold 2. Specifically, the protective plate 22 is first placed on the support plate 25, and then the protective plate 22 is pushed towards the lower mold 2. At this time, the protective plate 22 will push the inclined surface of the clamping rod 28, causing the clamping rod 28 to move in the direction of the compression auxiliary spring 29. After the surface of the protective plate 22 is in contact with the surface of the lower mold 2, the clamping rod 28 loses the compression force. At this time, the clamping rod 28 rises under the action of the auxiliary spring 29, and then the clamping rod 28 holds the protective plate 22 in place. At this time, the surfaces of the adjacent protective plates 22 are in contact, and the protective plate 22 works stably, isolating the lower mold 2 from the external space and improving the safety of the lower mold 2 during operation.

[0046] Example 4: Unlike Example 3, the upward push block 23 and auxiliary block 30 allow the heat sink 21 and heat sink fins 24 to be in a movable state, thereby increasing their contact with air and optimizing the heat dissipation effect. Figure 10 and Figure 13 as well as Figure 14 As shown, a tank cover 9 is movably provided on the upper surface of the water tank 6, and a heat dissipation fin 24 is slidably connected inside the tank cover 9. A heat dissipation plate 21 is fixedly connected to the lower surface of the heat dissipation fin 24. An upward push block 23 is fixedly connected to the upper surface of the movable frame 11. An auxiliary block 30 corresponding to the upward push block 23 is fixedly connected to the lower surface of the heat dissipation plate 21. The auxiliary blocks 30 are evenly distributed on the lower surface of the heat dissipation plate 21, and the left and right sides of the auxiliary blocks 30 and the left and right sides of the upward push block 23 are both inclined.

[0047] During the movement of the movable frame 11, the auxiliary block 30 is intermittently pushed by the push block 23. When the auxiliary block 30 is pushed, the heat sink 21 and heat sink fins 24 move upward inside the cover 9. When the auxiliary block 30 is not pushed, the heat sink 21 and heat sink fins 24 move downward inside the cover 9 under their own gravity. Repeating the above process, the heat sink 21 and heat sink fins 24 are in a moving state, so that the heat sink 21 and heat sink fins 24 can come into contact with more air, thus optimizing the cooling effect. When the heat sink 21 and heat sink fins 24 are working, the bottom of the heat sink 21 is located above the movable frame 11 and does not come into contact with the coolant, so the heat sink 21 and heat sink fins 24 can keep themselves clean, thus keeping the heat dissipation effect at its best.

[0048] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large wind turbine planetary carrier casting molding equipment, comprising a base plate (1), wherein a lower mold (2) is fixedly connected to the upper surface of the base plate (1), and an upper mold (3) is connected to the upper surface of the lower mold (2) via an electric slide rail, and a water tank (6) is fixedly connected to the upper surface of the base plate (1). Its features are: The lower mold (2) is internally connected to a heat dissipation circulation pipe (5); The interior of the water tank (6) is connected to a connecting plate (12) via a reciprocating mechanism, and the interior of the water tank (6) is connected to an activated carbon adsorption plate (17) via a reciprocating mechanism. The upper surface of the water tank (6) is movably provided with a tank cover (9), and the inside of the tank cover (9) is slidably connected with heat dissipation fins (24), and the lower surface of the heat dissipation fins (24) is fixedly connected with a heat dissipation plate (21). The surface of the lower mold (2) is connected to a protective plate (22) by a locking mechanism; The water tank (6) is rotatably provided with a connecting shaft (7), and a water wheel (8) is fixedly connected to the surface of the connecting shaft (7). The reciprocating mechanism includes a cam (10) fixedly connected to the surface of the connecting shaft (7), and a movable frame (11) is sleeved and connected to the surface of the cam (10), and a connecting plate (12) is fixedly connected to the lower surface of the movable frame (11). A limiting rod (13) is fixedly connected to the inner wall of the water tank (6), and the connecting plate (12) is sleeved on the surface of the limiting rod (13). The connecting plate (12) is symmetrically distributed on both sides of the movable frame (11), and the surface of the connecting plate (12) is provided with through holes (18) at equal intervals. The reciprocating mechanism includes a push rod (14) fixedly connected to the surface of the connecting plate (12), a fixing block (15) is bolted to the inner wall of the water tank (6), and a rotating shaft (16) is rotatably provided inside the fixing block (15), and the activated carbon adsorption plate (17) is fixedly connected to the surface of the rotating shaft (16). A top rod (19) is inserted into the bottom of the water tank (6), and the left side of the top rod (19) is an inverted "L" structure. A torsion spring (20) that plays an elastic reset role is fixedly connected to the surface of the rotating shaft (16), and the other side of the torsion spring (20) is fixedly connected to the inner wall of the fixing block (15).

2. The large-scale wind turbine planetary carrier casting equipment according to claim 1, characterized in that: The upper surface of the upper mold (3) is fixedly connected to a feed pipe. The left end of the heat dissipation circulation pipe (5) is located inside the water tank (6). The upper surface of the base plate (1) is fixedly connected to a pump (4), and the input end of the pump (4) is located inside the water tank (6). The output end of the pump (4) is fixedly connected to the right side of the heat dissipation circulation pipe (5). The surface of the upper mold (3) is provided with a liquid inlet pipe.

3. The large-scale wind turbine planetary carrier casting equipment according to claim 1, characterized in that: The activated carbon adsorption plate (17) is inclined, and the surface of the activated carbon adsorption plate (17) is initially in contact with the surface of the top rod (19).

4. The casting and forming equipment for large wind turbine planetary carriers according to claim 1, characterized in that: The protective plates (22) are symmetrically distributed on both sides of the lower mold (2).

5. The casting and forming equipment for large wind turbine planetary carriers according to claim 1, characterized in that: The locking mechanism includes a support plate (25) fixedly connected to the outer wall of the lower mold (2), and a locking rod (28) is slidably arranged inside the support plate (25). A long rod (26) is fixedly connected to the outer wall of the lower mold (2). A column (27) is fixedly connected to the inner wall of the locking rod (28), and the long rod (26) is sleeved on the surface of the column (27). An auxiliary spring (29) that plays an elastic reset role is fixedly connected to the upper surface of the long rod (26), and the other side of the auxiliary spring (29) is fixedly connected to the inner wall of the locking rod (28). The outer surface of the locking rod (28) is inclined.

6. The casting and forming equipment for large wind turbine planetary carriers according to claim 1, characterized in that: The upper surface of the movable frame (11) is fixedly connected to an upward push block (23), and the lower surface of the heat sink (21) is fixedly connected to an auxiliary block (30) corresponding to the upward push block (23). The auxiliary blocks (30) are evenly distributed on the lower surface of the heat sink (21), and the left and right sides of the auxiliary blocks (30) and the left and right sides of the upward push block (23) are both inclined.

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