Intelligent anti-whirl switch

Abstract

This invention provides an intelligent rotary paddle switch, relating to the field of soft soil foundation treatment technology. The intelligent rotary paddle switch includes: an aluminum alloy junction box; a protective sleeve connected to the bottom of the aluminum alloy junction box; a Hall motor module installed inside the aluminum alloy junction box; a rotating shaft, one end of which is driven by the Hall motor module, and the other end of which passes through the protective sleeve; and a folding blade connected to the end of the rotating shaft furthest from the Hall motor module. In this application, the folding blade is the direct executor of the detection action. Between its free and obstructed states, there is a clear and significant change in mechanical state and load torque. The resulting physical change is transmitted losslessly to the Hall motor module through the rigid rotating shaft, providing a clear and definite detection signal source and achieving accurate material level detection.

Description

Technical Field

[0001] This invention relates to an intelligent sensor, and more particularly to an intelligent rotary switch. Background Technology

[0002] In industrial production processes, especially in the storage and transportation of bulk solid materials, level detection is a crucial step in ensuring production continuity, safety, and automation. Rotary paddle level switches, as a classic contact-type point-type level detection instrument, have been widely used due to their relatively simple structure, low cost, and wide applicability. Their traditional working principle typically relies on a micro-motor driving an external paddle to rotate at a low speed within the material. When the paddle encounters resistance in the material, the motor load increases, triggering a microswitch or a current relay via an internal mechanical transmission mechanism, thereby outputting a switching signal.

[0003] However, with the increasing complexity and severity of industrial applications, especially in environments with high dust, high humidity, corrosive atmospheres, or extreme temperatures, the inherent defects of traditional rotary paddle level switches have become increasingly apparent. Their status detection mechanisms are crude and easily damaged, relying on mechanical microswitches or pure current detection. Their response thresholds are fixed, making them insensitive to gradual changes in working conditions such as slight blockage or blade adhesion. Furthermore, the mechanical contacts are prone to failure due to frequent operation or dust wear. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an intelligent rotary switch.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A smart rotary switch, comprising: Aluminum alloy junction box; A protective sleeve is connected to the bottom end of the aluminum alloy junction box; A Hall motor module, wherein the Hall motor module is installed inside the aluminum alloy junction box; A rotating shaft, one end of which is driven and connected to the Hall motor module, and the other end of which passes through the protective sleeve; Folding blades, the folding blades being connected to the end of the rotating shaft furthest from the Hall motor module. Preferably, the Hall motor module includes a coil stator assembly, a magnet rotor assembly, a motor, a control circuit board, and a Hall effect detector. The motor is installed inside the aluminum alloy junction box. The wires of the coil stator assembly are connected to the control circuit board and are stationary relative to the aluminum alloy junction box. The coil stator assembly is disposed inside the aluminum alloy junction box and surrounds the magnet rotor assembly. The Hall effect detector is disposed on the control circuit board and corresponds to the position of the magnet rotor assembly.

[0006] Preferably, the bottom end of the protective sleeve is provided with a sealing mechanism, which enables the rotating shaft to rotate while keeping the bottom end of the protective sleeve sealed.

[0007] Preferably, the sealing mechanism includes an oil seal, a sealing cap, and a bearing. The outer ring of the bearing is connected to the inner wall of the protective sleeve, the inner ring of the bearing is fixedly sleeved on the rotating shaft, the sealing cap is connected to the bottom end of the protective sleeve, the oil seal is disposed between the sealing cap and the bearing, and the oil seal is sleeved on the rotating shaft.

[0008] Preferably, the sealing mechanism further includes a sealing ring, which is circumferentially embedded in the annular cavity of the oil seal.

[0009] Preferably, the intelligent rotary switch further includes a heating mechanism located inside the protective sleeve. When the temperature is lower than a preset value, the heating mechanism is used to heat the oil seal and the sealing ring.

[0010] Preferably, the intelligent rotary switch further includes a cooling mechanism located inside the protective sleeve. When the temperature is higher than a preset value, the cooling mechanism is used to cool the oil seal and the sealing ring.

[0011] Preferably, the heating mechanism includes a first power supply, a first conductive wire, and a first semiconductor refrigeration chip. The first power supply is connected inside the protective sleeve. The first power supply is electrically connected to the first semiconductor refrigeration chip through the first conductive wire. The heating surface of the first semiconductor refrigeration chip faces the space where the oil seal is located, and a heat-sensitive mechanism is connected to the heating surface of the first semiconductor refrigeration chip.

[0012] Preferably, the cooling mechanism includes a second power source, a second conductive wire, and a second semiconductor cooling chip. The second power source is connected inside the protective sleeve. The second power source is electrically connected to the second semiconductor cooling chip through the second conductive wire. The cooling surface of the second semiconductor cooling chip faces the space where the oil seal is located, and a heat-sensitive mechanism is connected to the cooling surface of the second semiconductor cooling chip.

[0013] Preferably, the heat-sensitive mechanism includes a heat-conducting bracket, a cold / heat sensing unit, a first metal rod, a pressure sensor, a spring, a tension sensor, and a second metal rod. The heat-conducting bracket is connected to the cooling surface of the second thermoelectric cooler. One end of the first metal rod is connected to the cooling surface of the second thermoelectric cooler. The other end of the first metal rod is equipped with a pressure sensor. The sensing end of the pressure sensor is connected to one end of the spring. The other end of the spring is connected to the tension sensor. The tension sensor is installed at one end of the second metal rod. The other end of the second metal rod is connected to the sealing ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The Hall motor module is completely sealed inside an aluminum alloy junction box. The rotating shaft transmits power under the shielding of the protective sleeve, and the folding blade at the end is exposed to the material. The folding blade is the direct executor of the detection action. There is a clear and large mechanical state and load torque change between the free state and the obstructed state. The resulting physical change is transmitted to the Hall motor module without loss through the rigid rotating shaft, providing a clear and definite detection signal source and realizing accurate detection of material level. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the intelligent rotary switch proposed in this invention; Figure 2 This is a front view of the intelligent rotary switch proposed in this invention; Figure 3 This is a schematic diagram of the Hall motor module in the intelligent rotary switch proposed in this invention; Figure 4 This is a schematic diagram of the sealing mechanism in the intelligent rotary paddle switch proposed in this invention; Figure 5 This is a schematic diagram of the oil seal structure in the intelligent rotary paddle switch proposed in this invention; Figure 6 This is a schematic diagram of the installation of the sealing ring in the intelligent rotary switch proposed in this invention; Figure 7 This is a state diagram of the hot and cold sensing unit of the intelligent rotary switch proposed in this invention under high temperature conditions; Figure 8 This is a state diagram of the cold and heat sensing unit of the intelligent rotary switch proposed in this invention under low temperature conditions.

[0016] In the diagram: 1. Aluminum alloy junction box; 2. Protective sleeve; 3. Hall motor module; 4. Folding blade; 5. Rotating shaft; 6. Heating mechanism; 61. First power supply; 62. First conductive wire; 63. First semiconductor refrigeration chip; 7. Refrigeration mechanism; 71. Second power supply; 72. Second conductive wire; 73. Second semiconductor refrigeration chip; 8. Sealing mechanism; 81. Oil seal; 82. Sealing ring; 83. Sealing cover; 84. Bearing; 9. Heat-sensitive mechanism; 91. Heat-conducting bracket; 92. Cold and heat sensing unit; 921. First metal rod; 922. Pressure sensor; 923. Spring; 924. Tension sensor; 925. Second metal rod. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0022] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0023] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, an embodiment of the present invention provides an intelligent rotary switch, comprising: Aluminum alloy junction box 1; Protective sleeve 2 is connected to the bottom end of aluminum alloy junction box 1; Hall motor module 3, which is installed inside aluminum alloy junction box 1; Rotating shaft 5, one end of which is driven by Hall motor module 3, and the other end of rotating shaft 5 passes through protective sleeve 2; Folding blade 4 is connected to the end of rotating shaft 5 away from Hall motor module 3.

[0024] Specifically, the interior of the aluminum alloy junction box 1 forms a sealed electrical chamber, and a waterproof connector for introducing cables is provided on the side. The protective sleeve 2 is a hollow rigid tube, and its top end is firmly connected to the bottom outlet of the aluminum alloy junction box 1 by threads or flanges, forming a downward-extending, protected mechanical channel. The Hall motor module 3 is an integrated drive and sensing unit. Its outer housing is fixedly installed inside the aluminum alloy junction box 1 by screws or clips. Its power output shaft faces downward. The rotating shaft 5 is a slender metal shaft. Its upper end is connected to the output shaft of the Hall motor module 3 by a coupling or reduction gear. Its shaft body passes through the hollow inner cavity of the protective sleeve 2. The folding blade 4 is connected by a key or threaded fastener to the shaft head of the rotating shaft 5 that extends out of the bottom of the protective sleeve 2.

[0025] In this optional embodiment, the Hall motor module 3 is completely sealed inside the aluminum alloy junction box 1. The rotating shaft 5 transmits power under the shielding of the protective sleeve 2. The folding blade 4 at the end is exposed to the material. The folding blade 4 is the direct executor of the detection action. There is a clear and large mechanical state and load torque change between the free state and the obstructed state. The resulting physical change is transmitted to the Hall motor module 3 without loss through the rigid rotating shaft 5, providing a clear and definite detection signal source and realizing accurate detection of the material level.

[0026] Optionally, the Hall motor module 3 includes a coil stator assembly, a magnet rotor assembly, a motor, a control circuit board, and a Hall effect detector. The motor is installed in an aluminum alloy junction box 1. The wires of the coil stator assembly are connected to the control circuit board and are stationary relative to the aluminum alloy junction box 1. The coil stator assembly is located inside the aluminum alloy junction box 1 and surrounds the magnet rotor assembly. The Hall effect detector is located on the control circuit board and corresponds to the position of the magnet rotor assembly.

[0027] Specifically, the motor is a miniature DC motor or synchronous motor, providing the initial rotational power. The coil stator assembly and the magnet rotor assembly together form a precision torque transmission and detection coupler. The magnet rotor assembly is fixedly connected to the motor's output shaft and rotates with the motor shaft. The magnet rotor assembly is typically composed of a ring-shaped permanent magnet, with its circumference alternately magnetized with N and S poles. The coil stator assembly is fixedly installed inside the aluminum alloy junction box 1, either via a bracket or directly on the control circuit board, thus remaining stationary relative to the junction box 1. The coil stator assembly consists of one or more coils wound with enameled wire, the ends of which are connected to the control circuit board. The coil stator assembly spatially surrounds the magnet rotor assembly, either outside or inside, maintaining a small air gap to form a non-contact magnetic coupling. The control circuit board integrates a power management chip, a microprocessor (MCU), a drive circuit, and a signal output circuit, enabling the motor to rotate at a constant low speed. Hall effect detectors (usually one or more Hall sensor chips) are mounted on a control circuit board, and their sensing surfaces are precisely arranged to correspond to the rotation path of the magnet rotor assembly. For example, when the magnet rotor assembly rotates, its alternating magnetic field periodically passes over the fixed Hall effect detector.

[0028] In this optional embodiment, when the control circuit board drives the motor to rotate, the magnet rotor assembly rotates synchronously. Through the rotating magnetic field generated by the permanent magnets, it drives the load (i.e., the external rotating shaft 5 and the folding blades 4) mechanically connected to the coil stator assembly (e.g., via a shaft or coupling structure) to rotate in a non-contact magnetic coupling manner. This non-contact torque transmission method avoids the dynamic seals required by traditional gears or couplings, fundamentally eliminating potential leakage and wear points. A Hall effect detector continuously detects the periodic magnetic field changes generated by the rotating magnet rotor assembly and converts them into a series of electrical pulse signals. The MCU on the control circuit board monitors the frequency or period of these electrical pulse signals in real time. When the folding blades 4 rotate freely in the air, the load torque is very small, the magnetic coupling transmission between the magnet rotor assembly and the coil stator assembly is smooth, the motor current is stable, and the pulse frequency output by the Hall effect detector is stable. When the folding blade 4 encounters resistance in contact with the material, the load torque increases sharply. This increased torque is reflected in the magnetic coupling, creating a magnetic tension or angular displacement difference between the rotating magnet rotor assembly and the load attempting to prevent its rotation. This dynamic change leads to two detectable effects: a. Motor current change: The drive motor needs to output greater torque to overcome the resistance, and its operating current increases significantly. The control circuit board detects this current change through a sampling resistor.

[0029] b. Rotational Speed / Pulse Variation: More directly, the resistance of the load can cause a momentary drop in the actual rotational speed of the magnet rotor assembly or cause it to vibrate. The pulse frequency output by the Hall effect detector will subsequently decrease or exhibit irregular intervals. By comprehensively analyzing the abnormalities in the motor current and Hall pulse signals (e.g., current exceeding a threshold and pulse frequency below the threshold for a certain period), the MCU can accurately determine that the folding blade 4 is obstructed. Subsequently, the MCU control signal output circuit changes state (e.g., relay contact activation), issuing a material level alarm signal. Once the resistance disappears, all parameters return to normal, and the MCU control output signal resets.

[0030] Furthermore, the bottom end of the protective sleeve 2 is provided with a sealing mechanism 8, which enables the rotating shaft 5 to rotate while keeping the bottom end of the protective sleeve 2 sealed.

[0031] Specifically, the sealing mechanism 8 is installed at the opening at the bottom end of the protective sleeve 2. Its basic structure includes a sealing seat with a central shaft hole. The sealing seat is screwed in by threads or fixed to the end of the protective sleeve 2 by flange bolts. At least one set of rotating dynamic seals (such as lip seals or mechanical seals) is installed in the shaft hole of the sealing seat. The inner ring of the dynamic seal forms a tight sliding seal with the outer surface of the rotating shaft 5, allowing the shaft to rotate but preventing the medium from passing through. A static sealing gasket is provided between the sealing seat and the end face of the protective sleeve 2.

[0032] Optionally, the sealing mechanism 8 includes an oil seal 81, a sealing cover 83, and a bearing 84. The outer ring of the bearing 84 is connected to the inner wall of the protective sleeve 2, the inner ring of the bearing 84 is fixedly sleeved on the rotating shaft 5, the sealing cover 83 is connected to the bottom end of the protective sleeve 2, the oil seal 81 is located between the sealing cover 83 and the bearing 84, and the oil seal 81 is sleeved on the rotating shaft 5.

[0033] Specifically, bearing 84 is a deep groove ball bearing or a sliding bearing. Its outer ring is pressed into the bearing housing hole machined at the bottom end of the protective sleeve 2 with an interference fit. The inner ring of bearing 84 is fixedly mounted on the corresponding shoulder of the rotating shaft 5 by set screws or interference fit. Oil seal 81 is a standard lip seal ring. Its metal skeleton outer ring is pressed into an intermediate mounting sleeve or directly into the corresponding step of the inner diameter of the protective sleeve 2, located below bearing 84. The rubber lip of oil seal 81 forms a sealing contact with the smooth journal surface of the rotating shaft 5 under the clamping of the internal circumferential spring. Sealing cover 83 is an end flange cover, which is fastened to the bottom end face of the protective sleeve 2 with bolts, axially pressing oil seal 81 and bearing 84 and sealing them in the cavity. A small gap is left between the center hole of sealing cover 83 and the rotating shaft 5.

[0034] Furthermore, the sealing mechanism 8 also includes a sealing ring 82, which is circumferentially embedded in the annular cavity of the oil seal 81.

[0035] Specifically, the oil seal 81 has a specific annular cavity or groove designed in its rubber body, called the annular chamber. The sealing ring 82 is an elastic rubber ring with a circular or rectangular cross-section. Its material can be the same as or more elastic than that of the oil seal 81. During the manufacturing or assembly process of the oil seal 81, the sealing ring 82 is pre-embedded in the annular chamber. After assembly, the oil seal 81 with the sealing ring 82 embedded is pressed into the installation position of the sealing mechanism 8 as a whole.

[0036] In this optional embodiment, the sealing ring 82 embedded in the cavity is in a compressed state after installation. The restoring force generated by its elastomer applies a continuous internal radial expansion pressure to the rubber matrix of the oil seal 81. This expansion pressure is directly transmitted to the main sealing lip of the oil seal 81, which is equivalent to additionally and actively increasing the radial contact pressure of the sealing lip on the rotating shaft 5 in addition to the clamping force of the circumferential spring. This effectively compensates for the natural attenuation of the sealing force of the oil seal 81 due to stress relaxation after long-term service. The sealing ring 82 acts like a built-in elastic support ring, strengthening the overall structural rigidity of the lip area of ​​the oil seal 81 from the inside. This allows the sealing lip to maintain better shape integrity and more agile elastic deformation following ability when facing small dynamic eccentricities or jumps of the rotating shaft 5, ensuring that the sealing contact line is always continuous and tightly fitted, resulting in a better dynamic sealing effect. The presence of the sealing ring 82 gives the oil seal 81 a double guarantee of the expansion force of the sealing ring 82 and the clamping force of the circumferential spring. Even if the force of the circumferential spring decreases due to fatigue, the force of the internal sealing ring 82 can still maintain the basic sealing pressure, providing performance redundancy. Meanwhile, higher initial pressure and better followability reduce the wear rate of the main sealing lip, thereby extending the service life of the oil seal 81 and even the entire sealing mechanism 8.

[0037] Optionally, the intelligent rotary switch also includes a heating mechanism 6, which is located inside the protective sleeve 2. When the temperature is lower than the preset value, the heating mechanism 6 is used to heat the oil seal 81 and the sealing ring 82.

[0038] In this optional embodiment, the rubber lip of the oil seal 81 and the elastomer of the sealing ring 82 enter the glass transition region at low temperatures, causing the material to harden, become brittle, and lose elasticity, resulting in the sealing lip failing to fit the journal and causing leakage. The core function of the heating mechanism 6 is to actively heat and raise the operating temperature of the protected rubber parts and maintain it within a safe range above their glass transition temperature, restoring their high elasticity and flexibility. Through heating intervention, the oil seal 81 can re-establish effective sealing contact pressure, and the sealing ring 82 can also restore its internal support function, thereby ensuring that the entire sealing mechanism 8 still has reliable sealing performance in low-temperature environments. This directly solves the industry problem of traditional rotary paddle switches not being able to operate normally in cold regions or freezing conditions. Heating not only protects the rubber parts but also keeps the grease fluid, significantly reducing the starting torque and running resistance of the rotating shaft 5 at low temperatures. It avoids excessive starting current impact on the Hall motor module 3 and also prevents abnormal wear or structural damage caused by the brittleness and increased friction of the rubber parts.

[0039] Furthermore, the intelligent rotary switch also includes a cooling mechanism 7, which is located inside the protective sleeve 2. When the temperature is higher than the preset value, the cooling mechanism 7 is used to cool the oil seal 81 and the sealing ring 82.

[0040] In this optional embodiment, the rubber material undergoes irreversible chemical aging such as oxidation and cross-linking under continuous high temperatures, leading to hardening, cracking, and permanent deformation. The cooling mechanism 7 actively removes heat, controlling the operating temperature of the oil seal 81 and sealing ring 82 below the long-term temperature limit allowed by their materials, thereby significantly slowing down the thermal aging process and protecting the mechanical properties and elasticity of the rubber components. In high-temperature environments, the cooling mechanism 7 prevents the sealing force from loosening due to excessive softening of the rubber and avoids dry friction caused by grease evaporation or coking. Through active cooling, it ensures that the sealing mechanism 8 maintains its designed sealing pressure and stable operating state even under high-temperature conditions (such as hot material storage).

[0041] Optionally, the heating mechanism 6 includes a first power supply 61, a first conductive wire 62, and a first semiconductor cooling chip 63. The first power supply 61 is connected inside the protective sleeve 2. The first power supply 61 is electrically connected to the first semiconductor cooling chip 63 through the first conductive wire 62. The heating surface of the first semiconductor cooling chip 63 faces the space where the oil seal 81 is located, and a heat-sensitive mechanism 9 is connected to the heating surface of the first semiconductor cooling chip 63.

[0042] Specifically, the first power supply 61 is a DC regulated power supply module, which is installed inside the protective sleeve 2. When the temperature of the sensing point reaches the set upper limit, heating stops.

[0043] Furthermore, the cooling mechanism 7 includes a second power supply 71, a second conductive line 72, and a second semiconductor cooling chip 73. The second power supply 71 is connected inside the protective sleeve 2. The second power supply 71 is electrically connected to the second semiconductor cooling chip 73 through the second conductive line 72. The cooling surface of the second semiconductor cooling chip 73 faces the space where the oil seal 81 is located, and the cooling surface of the second semiconductor cooling chip 73 is connected to a heat-sensitive mechanism 9.

[0044] Specifically, by utilizing the Peltier heat absorption effect of the cooling surface of the second semiconductor cooling chip 73, heat can be actively and quickly extracted from the oil seal 81 area to achieve localized and powerful cooling, resisting high ambient temperature and frictional heat generation. The heat-sensitive mechanism 9 directly monitors the temperature of the cooling surface or the temperature of the cooling point it affects. When the temperature of this point is higher than the high temperature set value, cooling is started; when the temperature is cooled to the set lower limit, cooling is stopped.

[0045] Optionally, the heat-sensitive mechanism 9 includes a heat-conducting bracket 91, a cold and heat sensing unit 92, a first metal rod 921, a pressure sensor 922, a spring 923, a tension sensor 924, and a second metal rod 925. The heat-conducting bracket 91 is connected to the cooling surface of the second semiconductor refrigeration chip 73. One end of the first metal rod 921 is connected to the cooling surface of the second semiconductor refrigeration chip 73. The pressure sensor 922 is installed on the other end of the first metal rod 921. The sensing end of the pressure sensor 922 is connected to one end of the spring 923. The other end of the spring 923 is connected to the tension sensor 924. The tension sensor 924 is installed on one end of the second metal rod 925. The other end of the second metal rod 925 is connected to the sealing ring 82.

[0046] Specifically, the heat-conducting bracket 91 is fixedly connected to the cooling surface of the second semiconductor refrigeration chip 73 by thermally conductive silicone grease. The first metal rod 921 is a rigid rod, one end of which is fixedly connected to the heat-conducting bracket 91, so its spatial position is fixed. The second metal rod 925 is also a rigid rod, one end of which is connected to the top of the sealing ring 82. The pressure sensor 922 is fixedly installed at the bottom end of the first metal rod 921, with its pressure sensing probe facing the direction of the second metal rod 925. The tension sensor 924 is fixedly installed at the top end of the second metal rod 925, with its tension sensing hook facing the direction of the first metal rod 921. The spring 923 is connected between the sensing probe of the pressure sensor 922 and the sensing hook of the tension sensor 924. When the temperature of the sealing part rises, the material of the sealing ring 82 expands due to heat, increasing its volume and outer diameter. This pushes up the second metal rod 925 connected to it, causing its tip to move towards the first metal rod 921. Conversely, when the temperature decreases, the sealing ring 82 contracts, decreasing its volume and outer diameter. This pulls down the second metal rod 925, causing its tip to move away from the first metal rod 921. When the sealing ring 82 expands and pushes up the second metal rod 925, the spring 923 is compressed, and the pressure sensor 922 detects an increase in pressure. When the sealing ring 82 contracts and pulls down the second metal rod 925, the spring 923 is stretched, and the tension sensor 924 detects an increase in tension. Therefore, the temperature state of the sealing ring 82 (corresponding to its volume) is converted into a pressure or tension signal on the spring 923 without delay and on a one-to-one basis.

[0047] In this optional embodiment, the pressure sensor 922 is set to have a high-pressure trigger threshold (corresponding to an overheated state), and the tension sensor 924 is set to have a high-tension trigger threshold (corresponding to an undercooled state). When the pressure exceeds the threshold, it can be determined that the sealing ring 82 is in a thermal expansion state (overheated), triggering the cooling mechanism 7 to start. When the tension exceeds the threshold, it can be determined that the sealing ring 82 is in a cold contraction state (undercooled), triggering the heating mechanism 6 to start. The entire sensing and judgment process is based entirely on mechanical structure and mechanical principles, without the need for external power supply for signal conversion. This heat-sensitive sensing mechanism 9 has no electronic sensing elements, and its sensing is direct and reliable.

[0048] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A smart rotary switch, characterized in that, include: Aluminum alloy junction box (1); A protective sleeve (2) is connected to the bottom end of the aluminum alloy junction box (1); Hall motor module (3), which is installed inside the aluminum alloy junction box (1); A rotating shaft (5) is provided, one end of which is driven by the Hall motor module (3), and the other end of which passes through the protective sleeve (2). Folding blade (4) is connected to one end of the rotating shaft (5) away from the Hall motor module (3).

2. The intelligent rotary switch according to claim 1, characterized in that, The Hall motor module (3) includes a coil stator group, a magnet rotor group, a motor, a control circuit board, and a Hall effect detector. The motor is installed in the aluminum alloy junction box (1). The wires of the coil stator group are connected to the control circuit board and are stationary relative to the aluminum alloy junction box (1). The coil stator group is located in the aluminum alloy junction box (1) and surrounds the magnet rotor group. The Hall effect detector is located on the control circuit board and corresponds to the position of the magnet rotor group.

3. The intelligent rotary switch according to claim 2, characterized in that, The bottom end of the protective sleeve (2) is provided with a sealing mechanism (8), which enables the rotating shaft (5) to rotate and keep the bottom end of the protective sleeve (2) sealed.

4. The intelligent rotary switch according to claim 3, characterized in that, The sealing mechanism (8) includes an oil seal (81), a sealing cover (83), and a bearing (84). The outer ring of the bearing (84) is connected to the inner wall of the protective sleeve (2), and the inner ring of the bearing (84) is fixedly sleeved on the rotating shaft (5). The sealing cover (83) is connected to the bottom end of the protective sleeve (2). The oil seal (81) is located between the sealing cover (83) and the bearing (84), and the oil seal (81) is sleeved on the rotating shaft (5).

5. The intelligent rotary switch according to claim 4, characterized in that, The sealing mechanism (8) further includes a sealing ring (82), which is circumferentially embedded in the annular cavity of the oil seal (81).

6. The intelligent rotary switch according to claim 5, characterized in that, The intelligent rotary switch also includes a heating mechanism (6), which is located inside the protective sleeve (2). When the temperature is lower than the preset value, the heating mechanism (6) is used to heat the oil seal (81) and the sealing ring (82).

7. The intelligent rotary switch according to claim 6, characterized in that, The intelligent rotary switch also includes a cooling mechanism (7), which is located inside the protective sleeve (2). When the temperature is higher than the preset value, the cooling mechanism (7) is used to cool the oil seal (81) and the sealing ring (82).

8. The intelligent rotary switch according to claim 7, characterized in that, The heating mechanism (6) includes a first power source (61), a first conductive wire (62), and a first semiconductor cooling chip (63). The first power source (61) is connected inside the protective sleeve (2). The first power source (61) is electrically connected to the first semiconductor cooling chip (63) through the first conductive wire (62). The heating surface of the first semiconductor cooling chip (63) faces the space where the oil seal (81) is located, and a heat-sensitive mechanism (9) is connected to the heating surface of the first semiconductor cooling chip (63).

9. The intelligent rotary switch according to claim 8, characterized in that, The cooling mechanism (7) includes a second power source (71), a second conductive wire (72), and a second semiconductor cooling chip (73). The second power source (71) is connected inside the protective sleeve (2). The second power source (71) is electrically connected to the second semiconductor cooling chip (73) through the second conductive wire (72). The cooling surface of the second semiconductor cooling chip (73) faces the space where the oil seal (81) is located, and a heat-sensitive mechanism (9) is connected to the cooling surface of the second semiconductor cooling chip (73).

10. The intelligent rotary switch according to claim 9, characterized in that, The heat-sensitive mechanism (9) includes a heat-conducting bracket (91), a cold and heat sensing unit (92), a first metal rod (921), a pressure sensor (922), a spring (923), a tension sensor (924), and a second metal rod (925). The heat-conducting bracket (91) is connected to the cooling surface of the second semiconductor refrigeration chip (73). One end of the first metal rod (921) is connected to the cooling surface of the second semiconductor refrigeration chip (73). The other end of the first metal rod (921) is equipped with a pressure sensor (922). The sensing end of the pressure sensor (922) is connected to one end of the spring (923). The other end of the spring (923) is connected to the tension sensor (924). The tension sensor (924) is installed on one end of the second metal rod (925). The other end of the second metal rod (925) is connected to the sealing ring (82).

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