A thermally conductive silicone grease negative pressure stirring device

Abstract

This utility model discloses a negative pressure stirring device for thermally conductive silicone grease, including a tank. A motor is installed at the top of the tank, and a first rotating shaft is installed on the output shaft of the motor. The first rotating shaft is rotatably connected to the tank, and a second rotating shaft is connected to the bottom of the first rotating shaft. In this utility model, the first and second rotating shafts are driven to rotate by the motor. Under the action of centrifugal force, the vertically arranged arc-shaped stirring blades gradually rotate and extend upward, realizing the stirring effect of thermally conductive silicone grease. Furthermore, the retraction of the hydraulic cylinder telescopic shaft drives the connecting plate and guide rod to descend, and the piston descends in the tank. The internal space of the tank below the piston achieves a negative pressure effect, thereby realizing the negative pressure stirring effect of thermally conductive silicone grease. The downward pressure of the piston makes the discharge of thermally conductive silicone grease after stirring smoother. At the same time, the piston can scrape off the thermally conductive silicone grease adhering to the arc-shaped stirring blades, realizing the cleaning effect of the stirring mechanism and avoiding waste.

Description

Technical Field

[0001] This utility model relates to the technical field of stirring devices, and in particular to a thermally conductive silicone grease negative pressure stirring device. Background Technology

[0002] Thermal grease, also known as heat dissipation paste, is a thermally conductive silicone grease compound made primarily from silicone with added heat-resistant and thermally conductive materials. It is used for heat conduction and dissipation in electronic components such as power amplifiers, transistors, electron tubes, and CPUs, thereby ensuring the stability of the electrical performance of electronic instruments and meters.

[0003] Utility model CN221951041U discloses a vacuum mixing tank for producing thermally conductive silicone grease, relating to the field of thermally conductive silicone grease production technology. This vacuum mixing tank for producing thermally conductive silicone grease includes a tank body. A vacuum pump is installed on one side of the upper end of the tank body, and a feed pipe is fixed to the other side of the upper end of the tank body. A stepper motor is fixed to the middle of the upper end of the tank body, and a fixed rod is fixed to the driving end of the stepper motor. A cleaning frame is fixed to the middle of the fixed rod, and rotating rods are rotatably connected to both sides of the cleaning frame. A mixing frame is fixed to the middle of each of the two rotating rods, and gears are fixed to the upper sides of each of the two rotating rods. A gear ring is fixed to the inner wall of the tank body. This vacuum mixing tank for producing thermally conductive silicone grease achieves thorough mixing by driving the fixed rods to rotate via the stepper motor, thus improving the effectiveness of the vacuum mixing device. The stepper motor-driven rotation of the fixed rods also enables quantitative feeding, thereby improving the working efficiency of the vacuum mixing tank.

[0004] After searching, it was found that the existing technology has certain defects. Since thermal grease always remains in a paste state at room temperature and has a certain viscosity, the existing technology uses a vacuum pump to extract air, which makes it inconvenient to completely discharge the thermal grease from the device after stirring. In addition, thermal grease is easy to stick to the stirring mechanism, which wastes materials and is inconvenient to clean. Therefore, a thermal grease negative pressure stirring device is needed to meet people's needs. Summary of the Invention

[0005] The purpose of this invention is to provide a thermally conductive silicone grease negative pressure stirring device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a thermally conductive silicone grease negative pressure stirring device, comprising a tank, a motor mounted on the top of the tank, a first rotating shaft mounted on the output shaft of the motor, the first rotating shaft being rotatably connected to the tank, a second rotating shaft connected to the bottom of the first rotating shaft, the outer diameter of the second rotating shaft being smaller than the outer diameter of the first rotating shaft, a plurality of arc-shaped stirring blades rotatably connected to the bottom of the first rotating shaft, the plurality of arc-shaped stirring blades being vertically wrapped around the outer wall of the second rotating shaft, a hydraulic rod mounted on the outer wall of the tank, a connecting plate mounted on the telescopic shaft of the hydraulic rod, a guide rod connected to the bottom of the connecting plate, the guide rod being slidably connected inside the top of the tank, a piston connected to the bottom of the guide rod, the piston being sealed to the inner wall of the tank and sealed to the outer wall of the first rotating shaft, a feed pipe connected to the piston, the feed pipe being slidably connected inside the top of the tank, a discharge pipe connected to the bottom of the tank, and a solenoid valve mounted on both the discharge pipe and the feed pipe.

[0007] Preferably, the outer wall of the first rotating shaft is connected to the outer walls of the several arc-shaped stirring blades by hinges.

[0008] Preferably, the inner arc of the arc-shaped stirring blade is the same as the outer arc of the second rotating shaft, and the outer arc is the same as the outer arc of the first rotating shaft.

[0009] Preferably, the outer wall of the piston is sealed to the inner wall of the tank by a first sealing ring.

[0010] Preferably, the center of the piston is sealed to the outer arc of the first rotating shaft and the outer wall of the several arc-shaped stirring blades by a second sealing ring.

[0011] Preferably, the bottom inner wall of the tank and the bottom of the piston are both funnel-shaped, with the diameter and outer diameter gradually decreasing from top to bottom.

[0012] The beneficial effects of this utility model are:

[0013] In this invention, a motor drives the first and second rotating shafts to rotate. Under centrifugal force, the vertically arranged arc-shaped stirring blades gradually rotate and extend upward, achieving a stirring effect on the thermal grease. Furthermore, the retraction of the hydraulic cylinder's telescopic shaft causes the connecting plate and guide rod to descend, and the piston descends inside the tank. The internal space of the tank below the piston achieves a negative pressure effect, thereby achieving a negative pressure stirring effect on the thermal grease. The downward pressure of the piston makes the discharge of the thermal grease after stirring smoother. At the same time, the piston can scrape off the thermal grease adhering to the arc-shaped stirring blades, achieving a cleaning effect on the stirring mechanism and avoiding waste. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a thermally conductive silicone grease negative pressure stirring device proposed in this utility model;

[0015] Figure 2 This is a front cross-sectional view of a thermally conductive silicone grease negative pressure stirring device proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the connection structure of the first rotating shaft, the second rotating shaft, and the arc-shaped stirring blade of a thermally conductive silicone grease negative pressure stirring device proposed in this utility model.

[0017] In the diagram: 1. Tank body; 2. Motor; 3. First rotating shaft; 4. Second rotating shaft; 5. Arc-shaped stirring blade; 6. Hydraulic rod; 7. Connecting plate; 8. Guide rod; 9. Piston; 10. Feed pipe; 11. Discharge pipe; 12. Solenoid valve; 13. Hinge; 14. First sealing ring; 15. Second sealing ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-3 A thermally conductive silicone grease negative pressure stirring device includes a tank 1. A motor 2 is mounted on the top of the tank 1. A first rotating shaft 3 is mounted on the output shaft of the motor 2 and rotatably connected inside the tank 1. A second rotating shaft 4 is connected to the bottom of the first rotating shaft 3. The outer diameter of the second rotating shaft 4 is smaller than that of the first rotating shaft 3. Several arc-shaped stirring blades 5 are rotatably connected to the bottom of the first rotating shaft 3. The arc-shaped stirring blades 5 are vertically wrapped around the outer wall of the second rotating shaft 4. A hydraulic rod is mounted on the outer wall of the tank 1. 6. A connecting plate 7 is provided on the telescopic shaft of the hydraulic rod 6. A guide rod 8 is connected to the bottom end of the connecting plate 7. The guide rod 8 is slidably connected to the top end of the tank body 1. A piston 9 is connected to the bottom end of the guide rod 8. The piston 9 is sealed to the inner wall of the tank body 1 and to the outer wall of the first rotating shaft 3. A feed pipe 10 is connected to the piston 9. The feed pipe 10 is slidably connected to the top end of the tank body 1. A discharge pipe 11 is connected to the bottom end of the tank body 1. Solenoid valves 12 are provided on both the discharge pipe 11 and the feed pipe 10.

[0020] Raw materials are fed into the tank 1 space below piston 9 via feed pipe 10. The solenoid valves 12 on feed pipe 10 and discharge pipe 11 are closed to ensure the sealing of the tank 1 space below piston 9. Motor 2 is started, and the first rotating shaft 3 drives the second rotating shaft 4 to rotate. Under centrifugal force, the vertically arranged arc-shaped stirring blades 5 gradually rotate and extend upwards, achieving a stirring effect on the raw materials. The hydraulic rod 6 is driven, and the telescopic shaft drives the connecting plate 7 and guide rod 8 to descend. Piston 9 descends inside tank 1, creating negative pressure in the internal space of tank 1 below piston 9. As a result, the raw materials gradually form thermally conductive silicone grease under negative pressure. The power of motor 2 is turned off, and the solenoid valve 12 on the discharge pipe 11 is opened. The telescopic shaft of the hydraulic rod 6 is driven to continue to descend. During the downward pressing of piston 9, the thermally conductive silicone grease is gradually discharged from the tank 1 through the discharge pipe 11. During the downward pressing of piston 9, the arc-shaped stirring blade 5 rotates downward. The thermally conductive silicone grease adhering to the inner arc is discharged under the squeezing effect between it and the second rotating shaft 4. The thermally conductive silicone grease adhering to the outer arc is scraped off during the downward pressing of piston 9, thus achieving the cleaning effect of the stirring mechanism.

[0021] Specifically, in this embodiment, the outer wall of the first rotating shaft 3 is connected to the outer walls of several arc-shaped stirring blades 5 by hinges 13, thereby achieving the effect of vertical rotation of the arc-shaped stirring blades 5.

[0022] Specifically, in this embodiment, the inner arc of the arc-shaped stirring blade 5 is the same as the outer arc of the second rotating shaft 4, and the outer arc is the same as the outer arc of the first rotating shaft 3, so as to achieve a perfect merging between the arc-shaped stirring blade 5 and the second rotating shaft 4, and to form a columnar structure with the same outer diameter as the first rotating shaft 3 after merging. This ensures that the thermally conductive grease adhering to the inner arc of the arc-shaped stirring blade 5 is discharged under the squeezing effect between it and the second rotating shaft 4, and the thermally conductive grease adhering to the outer arc is scraped off during the downward pressing of the piston 9.

[0023] Specifically, in this embodiment, the outer wall of the piston 9 and the inner wall of the tank 1 are sealed together by the first sealing ring 14 to ensure the sealing effect. At the same time, the first sealing ring 14 scrapes off the thermal grease adhering to the inner wall of the tank 1 when it is pressed down with the piston 9.

[0024] Specifically, in this embodiment, the center of the piston 9 is sealed to the outer arc of the first rotating shaft 3 and the outer arc of several arc-shaped stirring blades 5 by a second sealing ring 15 to ensure the sealing effect. At the same time, the second sealing ring 15 can scrape off the thermally conductive silicone grease adhering to the outer arc of the first rotating shaft 3 and the arc-shaped stirring blades 5.

[0025] Specifically, in this embodiment, the bottom inner wall of the can 1 and the bottom of the piston 9 are both funnel-shaped, with the diameter and outer diameter gradually decreasing from top to bottom, which helps the thermal grease to be completely discharged from the can 1.

[0026] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A heat-conducting silicone grease negative pressure stirring device comprising a tank body (1), characterized in that: A motor (2) is installed at the top of the tank (1). A first rotating shaft (3) is installed on the output shaft of the motor (2). The first rotating shaft (3) is rotatably connected inside the tank (1). A second rotating shaft (4) is connected to the bottom end of the first rotating shaft (3). The outer diameter of the second rotating shaft (4) is smaller than the outer diameter of the first rotating shaft (3). Several arc-shaped stirring blades (5) are rotatably connected to the bottom end of the first rotating shaft (3). The several arc-shaped stirring blades (5) are vertically wrapped around the outer wall of the second rotating shaft (4). A hydraulic rod (6) is installed on the outer wall of the tank (1). The extension shaft of the hydraulic rod (6) is... A connecting plate (7) is provided, and a guide rod (8) is connected to the bottom end of the connecting plate (7). The guide rod (8) is slidably connected to the top end of the tank (1). A piston (9) is connected to the bottom end of the guide rod (8). The piston (9) is sealed to the inner wall of the tank (1) and to the outer wall of the first rotating shaft (3). A feed pipe (10) is connected to the piston (9). The feed pipe (10) is slidably connected to the top end of the tank (1). A discharge pipe (11) is connected to the bottom end of the tank (1). Solenoid valves (12) are provided on both the discharge pipe (11) and the feed pipe (10).

2. The negative pressure stirring device for heat-conducting silicone grease according to claim 1, characterized in that: The outer wall of the first rotating shaft (3) is connected to the outer walls of several arc-shaped stirring blades (5) by hinges (13).

3. The negative pressure stirring device for thermal conductive silicone grease according to claim 1, characterized in that: The inner arc of the arc-shaped stirring blade (5) is the same as the outer arc of the second rotating shaft (4), and the outer arc is the same as the outer arc of the first rotating shaft (3).

4. The thermally conductive silicone grease negative pressure stirring device according to claim 1, characterized in that: The outer wall of the piston (9) is sealed to the inner wall of the tank (1) by a first sealing ring (14).

5. The thermally conductive silicone grease negative pressure stirring device according to claim 1, characterized in that: The center of the piston (9) is sealed to the outer arc wall of the first rotating shaft (3) and several arc-shaped stirring blades (5) by a second sealing ring (15).

6. The thermally conductive silicone grease negative pressure stirring device according to claim 1, characterized in that: The bottom inner wall of the tank (1) and the bottom of the piston (9) are both funnel-shaped, and the diameter and outer diameter gradually decrease from top to bottom.

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