Plateau extremely cold mixing station material bin piezoelectric self-power generation heating device and method

Abstract

This invention belongs to the field of insulation and antifreeze technology for silos in high-altitude engineering mixing plants, specifically a piezoelectric self-generating heating device and method for silos in extremely cold high-altitude mixing plants. It includes: a multi-layer composite insulation silo body, which is a fully enclosed structure; a compartmentalized storage silo, located within the multi-layer composite insulation silo body and divided into independent coarse aggregate silos and fine aggregate silos; a partitioned piezoelectric energy harvesting module, with two independent units corresponding to the coarse and fine aggregate silos; a partitioned electrical energy storage and conversion module, with two independent units corresponding to the coarse and fine aggregate silos; a partitioned heating execution module, with two independent units corresponding to the coarse and fine aggregate silos; and an intelligent partitioned temperature control module, which employs a differentiated PID control algorithm and is electrically connected to the two partitioned heating execution modules respectively.

Description

Technical Field

[0001] This invention belongs to the field of heat preservation and antifreeze technology for silos in high-altitude engineering mixing plants, specifically a piezoelectric self-generating heating device and method for silos in extremely cold high-altitude mixing plants. Background Technology

[0002] Construction in high-altitude, extremely cold regions during winter faces multiple technical challenges: ambient temperatures often drop below -20°C, causing concrete aggregates to freeze and clump, reducing mixing uniformity; large diurnal temperature variations (up to 20°C or more) create temperature gradients between the aggregate surface and interior, leading to thermal stress cracks; and strong winds accelerate heat and moisture loss, further exacerbating the risk of frost damage. Traditional solutions often employ steam heating, fuel-fired heaters, or electric heating cables, which suffer from high energy consumption, reliance on external power / fuel supply, uneven heating, and poor insulation.

[0003] More importantly, the heating requirements for fine and coarse aggregates differ significantly: fine aggregates, with their small particle size and large specific surface area, easily absorb moisture and clump severely after freezing, requiring a higher heating temperature (8-12℃); coarse aggregates, with their large particle size and poor thermal conductivity, are prone to cracking due to excessively high temperatures causing the concrete to heat up too quickly after mixing, requiring only a lower temperature (5-8℃). Existing heating devices mostly adopt a uniform temperature control mode, which cannot meet the differentiated temperature requirements of aggregates with different particle sizes, easily leading to the dual problems of insufficient heating of fine aggregates and overheating of coarse aggregates.

[0004] Piezoelectric materials possess the characteristic of directly converting mechanical energy into electrical energy, and their inverse piezoelectric effect can achieve efficient energy conversion. However, in existing technologies, piezoelectric materials suffer from performance degradation at low temperatures, and single-degree-of-freedom energy-harvesting structures have low energy collection efficiency, making them unsuitable for the complex vibration environment of high-altitude areas. Furthermore, there is a lack of integrated designs for zoned temperature control of aggregate storage in mixing plants, failing to meet the heating precision and stability requirements for aggregates of different particle sizes. Therefore, developing a self-powered, zoned, and precisely temperature-controlled storage heating device adapted to the extreme environment of high-altitude areas is of significant practical importance. Summary of the Invention

[0005] In order to effectively solve the problems of aggregate freezing and arching in batching silos, this invention provides a piezoelectric self-generating heating device and method for silos in high-altitude and extremely cold mixing plants.

[0006] This invention adopts the following technical solution: a piezoelectric self-generating heating device for silos in high-altitude and extremely cold mixing plants suitable for multi-stacking material storage, comprising: The multi-layer composite insulated warehouse is a fully enclosed structure. The compartmentalized storage silo is housed within a multi-layer composite insulated silo. The compartmentalized storage silo is equipped with heat-insulating partitions and is divided into independent coarse aggregate silos and fine aggregate silos. The partitioned piezoelectric energy harvesting module is equipped with two independent units corresponding to the coarse and fine aggregate bins. It is used to collect the impact vibration energy of aggregate loading and unloading and the vibration energy of plateau wind energy and convert them into electrical energy. The partitioned energy storage and conversion module is provided with two independent units corresponding to the coarse and fine aggregate bins, which are electrically connected to the piezoelectric energy harvesting module of the corresponding bin. The partitioned heating execution module is provided with two independent units corresponding to the coarse and fine aggregate bins, which are electrically connected to the partitioned energy storage and conversion module of the corresponding bin. The intelligent zone temperature control module is electrically connected to the two group zone heating execution modules respectively, so as to realize independent temperature control of coarse and fine aggregates.

[0007] In some embodiments, the multi-layer composite insulated silo is made of double-layer galvanized color steel plate, and the outer layers on both sides of the double-layer galvanized color steel plate are provided with windproof and heat-insulating lining, silo interlayer serpentine flow channel and rock wool insulation layer in sequence from the outside to the inside. The insulation panels are made of polyurethane foam insulation material; the top of the silo is supported by welded horizontal and vertical supports and is equipped with a safety alarm device.

[0008] In some embodiments, the partitioned piezoelectric energy harvesting module includes: Piezoelectric vibrators are fixed to the walls and bottom of the coarse aggregate bin and the fine aggregate bin, respectively. Wind energy vibration data acquisition frame, the wind energy vibration data acquisition frame comprising: The arc-shaped flexible piezoelectric composite material sheet is welded to the base and reinforced with an oblique bracket. A windproof and sandproof protective cover is installed on its outer side.

[0009] In some embodiments, 20 sets of piezoelectric vibrators are evenly distributed at the bottom of the coarse aggregate bin, 3 sets of piezoelectric vibrators are distributed per square meter on the walls of the fine aggregate bin, and 15 sets are distributed at the bottom of the bin, in order to collect the energy generated by the vibration of loading and unloading.

[0010] In some embodiments, the partitioned energy storage and conversion module includes: A low-temperature lithium battery, wherein the low-temperature lithium battery is electrically connected to a piezoelectric vibrator and a wind energy vibration acquisition frame via wires; The converter converts the generated alternating current into direct current and stores it in the partitioned energy storage and conversion module.

[0011] In some embodiments, the partitioned heating execution module includes: A flexible electric heating film is laid at the bottom of a compartmentalized storage silo. A thermal cycling system, comprising: The serpentine flow channel in the interlayer of the silo is arranged in a multi-layer composite insulated silo, and the heat transfer medium is driven to flow through it by a piezoelectric micro-pump.

[0012] In some embodiments, the intelligent zone temperature control module includes: Three digital temperature sensors are pre-embedded in the surface, middle, and bottom layers of both the coarse and fine aggregate bins. Wind speed sensor, the wind speed sensor is installed on the top of the silo; The controller is connected to a digital temperature sensor, a wind speed sensor, and a zoned heating execution module; The controller has preset differentiated temperature thresholds: the heating temperature range for coarse aggregate bins is 5-12℃, and the heating temperature range for fine aggregate bins is 8-15℃.

[0013] In some embodiments, the piezoelectric vibrator is a three-degree-of-freedom structure with slots on all three surfaces. The pre-tightening encapsulation structure is fixed by inserting a connecting rod into the slots, and the pre-tightening encapsulation structure is provided with threaded through holes for external fixation.

[0014] In some embodiments, the serpentine flow channel in the interlayer of the silo is connected to a piezoelectric micropump via a quick-connect coupling, and a valve for controlling the on / off state is provided on the serpentine flow channel in the interlayer of the silo.

[0015] A piezoelectric self-generated heating control method for silos in high-altitude and extremely cold mixing plants with stacked material storage, comprising the following steps: The vibration energy of aggregate loading and unloading and the vibration energy of plateau wind energy are collected by the partitioned piezoelectric energy harvesting module and converted into electrical energy. The electrical energy is then rectified and boosted by the partitioned electrical energy storage and conversion module before being stored. Real-time temperature and ambient wind speed data of coarse aggregate bins and fine aggregate bins are collected using digital temperature and wind speed sensors. The intelligent zone temperature control module independently controls the start and stop of the zone heating execution module according to the different temperature thresholds of coarse and fine aggregates; When the temperature difference between the upper and lower layers of the chamber exceeds 8°C, the piezoelectric micro-pump thermal circulation system is activated to balance the temperature. When the wind speed exceeds 5 m / s, the heating power is automatically increased to compensate for heat dissipation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention addresses the need for frost protection of coarse and fine aggregates in mixing plants operating in extremely cold, high-altitude environments. It employs a design with independent temperature control in separate compartments and piezoelectric self-generating power, simultaneously recovering impact vibrations during loading and unloading, as well as ambient wind energy, converting them into electrical energy. This allows for long-term stable heating without an external power source. Through a combination of a three-degree-of-freedom piezoelectric vibrator and a high-low temperature adaptable battery, it can efficiently capture and supply power even at -40℃, solving the problems of low-temperature performance degradation and limited energy recovery in traditional devices. The invention utilizes a double-layer insulated silo body, independent zone heating, and a thermal circulation channel structure. Coarse and fine aggregate silos operate independently at different temperatures and power levels, preventing insufficient heating of fine aggregates and overheating damage to coarse aggregates, while also reducing heat crosstalk between silos. Combined with intelligent PID zone adjustment and wind speed compensation logic, it automatically balances temperature differences and compensates for heat loss due to strong winds, significantly improving heating uniformity and energy utilization. The overall structure is simple, wind-resistant, and low-temperature resistant, perfectly suited to the harsh construction conditions of high-altitude plateaus, large diurnal temperature variations, and strong winds with abundant dust, greatly improving aggregate frost protection efficiency and concrete mixing quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the device of the present invention; Figure 2 This is a schematic diagram of the internal materials of the multi-layer composite thermal insulation chamber of the present invention; Figure 3 This is a schematic diagram of the piezoelectric vibrator and the pre-tightening force packaging structure of the present invention; Figure 4 This is a schematic diagram of the serpentine flow channel of the present invention; Figure 5 This is a schematic diagram of the wind energy vibration data acquisition frame of the present invention; In the diagram: 1-Multi-layer composite insulated silo; 2-Coarse aggregate silo; 3-Fine aggregate silo; 4-Digital temperature sensor; 5-Piezoelectric vibrator; 6-Insulation partition; 7-Low-temperature lithium battery; 8-Converter; 9-Safety alarm device; 10-Longitudinal support; 11-Transverse support; 12-Wind energy vibration acquisition frame; 14-Piezoelectric micropump; 15-Wind speed sensor; 16-PTFE coating; 17-Flexible electric heating film; 20-Wire; 21-Controller; 23-Piezoelectric ceramic material; 25-Pre-tightened packaging structure. 26-Connecting rod, 27-Threaded through hole, 28-Double-layer galvanized color steel plate, 29-Windproof and heat-insulating lining, 30-Hardware interlayer serpentine flow channel, 31-Rock wool insulation layer, 32-Arc-shaped flexible piezoelectric composite material sheet, 33-Angled support, 34-Base, 35-Bolt, 36-Windproof and sandproof protective cover, 37-Quick connector, 39-Separated storage silo, 40-Separated piezoelectric energy harvesting module, 41-Separated electrical energy storage and conversion module, 42-Separated heating execution module, 43-Intelligent zoned temperature control module. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but 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.

[0019] like Figure 1 As shown, a piezoelectric self-generating heating device for silos in high-altitude, extremely cold mixing plants suitable for multi-stacking material storage includes: a multi-layer composite insulated silo body 1, which is a fully enclosed structure; a compartmentalized storage silo 39, which is located inside the multi-layer composite insulated silo body 1 and is equipped with heat-insulating partitions 6, dividing it into independent coarse aggregate silos 2 and fine aggregate silos 3; and a partitioned piezoelectric energy harvesting module 40, which has two independent units corresponding to the coarse and fine aggregate silos, used to collect the impact vibration energy of aggregate loading and unloading and the vibration energy of high-altitude wind energy and convert them into electricity. The system includes: a zoned energy storage and conversion module 41, which has two independent units corresponding to the coarse and fine aggregate bins, each electrically connected to the piezoelectric energy harvesting module of its respective bin; a zoned heating execution module 42, which has two independent units corresponding to the coarse and fine aggregate bins, each electrically connected to the zoned energy storage and conversion module 41 of its respective bin; and an intelligent zoned temperature control module 43, which uses a differentiated PID control algorithm and is electrically connected to the two zonesd heating execution modules 42 to achieve independent temperature control of the coarse and fine aggregates.

[0020] Please refer to the details. Figure 2 The multi-layer composite insulated silo 1 is made of double-layer galvanized color steel plate 28. The outer layers of the double-layer galvanized color steel plate 28 are provided with windproof and heat-insulating lining 29, silo interlayer serpentine flow channel 30 and rock wool insulation layer 31 from the outside to the inside. The heat insulation partition 6 is made of polyurethane foam heat insulation material. The silo top is supported by welding of horizontal support 11 and vertical support 10 and is equipped with a safety alarm device 9.

[0021] Please continue reading. Figure 1 The partitioned piezoelectric energy harvesting module 40 includes: a piezoelectric vibrator 5, which is fixed on the walls and bottom of the coarse aggregate bin 2 and the fine aggregate bin 3 respectively; and a wind energy vibration acquisition frame 12, which includes: an arc-shaped flexible piezoelectric composite material sheet 32, which is welded to the base 34 and reinforced by an inclined bracket 33, and has a wind and sand protection cover 36 on its outer side.

[0022] Piezoelectric vibrators 5 are fixed to the walls and bottoms of the coarse aggregate bin 2 and the fine aggregate bin 3 respectively via a pre-tightening encapsulation structure 25. Twenty sets of piezoelectric vibrators are evenly distributed on the bottom of the coarse aggregate bin, while three sets per square meter are distributed on the walls of the fine aggregate bin, and 15 sets are distributed on the bottom, for collecting energy generated by vibrations during loading and unloading. The main structure of the wind energy vibration acquisition frame 12 is an arc-shaped flexible piezoelectric composite material sheet 32, with a curvature adapted to the wind energy vibration acquisition frame, and a single sheet with an effective power generation area of ​​0.06 m². 2 It is fixed on the windward and leeward sides of the wind energy vibration collection frame. It uses the wind power of the plateau to drive the frame to vibrate, causing the piezoelectric element to bend and deform to generate electricity.

[0023] Please refer to the details. Figure 3 and Figure 4 The pre-tightening encapsulation structure 25 is a triangular structure, with threaded through holes 27 at the centers of its three sides, connecting to the connecting rod 26. The piezoelectric vibrator 5 converts mechanical vibration into electrical energy through the positive piezoelectric effect. When external mechanical vibration is transmitted to the three branches of the piezoelectric vibrator 5, regardless of the direction of the vibration, at least one or more branches will be mechanically excited and deform. The piezoelectric ceramic material 23 within the branches deforms due to pressure, tension, or shear force, causing the positive and negative charge centers within the material to generate equal amounts of induced charges of opposite signs on the electrode surface of the piezoelectric ceramic 23, achieving a direct conversion of mechanical energy into electrical energy. Compared to a single-degree-of-freedom piezoelectric vibrator, the coverage and efficiency of energy harvesting are significantly improved. The piezoelectric vibrator 5 has slots on its three sides, and the pre-tightening encapsulation structure 25 is fixed by inserting the connecting rod 26 into the slots. Each of the three sides of the pre-tightening encapsulation structure has threaded through holes 27 for connection to the outside.

[0024] The wind energy vibration data acquisition frame 12 is fixed to the horizontal support 11 on the top of the silo by bolts 35. The arc-shaped flexible piezoelectric composite material sheet 32 ​​is welded to the base 34 and reinforced by an inclined frame 33 to maintain stability. The wind energy vibration data acquisition frame 12 is equipped with a wind and sand protection cover 36 on the outside.

[0025] Please continue reading. Figure 1 The partitioned energy storage and conversion module 41 includes: a low-temperature lithium battery 7, which is electrically connected to the piezoelectric vibrator 5 and the wind energy vibration acquisition frame 12 via wires 20; and a converter 8, which converts the generated alternating current into direct current and stores it in the partitioned energy storage and conversion module 41.

[0026] The partitioned heating execution module 42 includes: a flexible electric heating film 17, which is laid at the bottom of the compartmented storage silo 39; and a heat circulation system, which includes: a serpentine flow channel 30 in the silo body interlayer, which is arranged in the multi-layer composite insulation silo body 1 and driven by a piezoelectric micro-pump 14 to circulate the heat transfer medium therein.

[0027] Specifically, the coarse aggregate bin is laid with a 150g / m² carbon fiber electric heating film 17, and the film surface is covered with a 0.5mm thick polytetrafluoroethylene coating 16; the fine aggregate bin has an electric heating film with a laying density of 200g / m²; the flow channel of the piezoelectric micropump 14 thermal circulation system is arranged inside the rock wool insulation layer 29 of the bin body, and the heat transfer medium is a 50% concentration ethylene glycol antifreeze solution; the flow channel of the coarse aggregate bin is designed as a large-diameter serpentine flow channel with a circulation rate of 0.8m / s; the flow channel of the fine aggregate bin is designed as a small-diameter dense flow channel with a circulation rate of 1.2m / s, which is suitable for the requirement of rapid heating of fine aggregate.

[0028] The intelligent zone temperature control module 43 includes: a digital temperature sensor 4, with three digital temperature sensors 4 pre-embedded in the surface, middle, and bottom layers of the coarse aggregate bin 2 and the fine aggregate bin 3 respectively; a wind speed sensor 15, which is installed on the top of the bin; and a controller 21, which connects the digital temperature sensor 4, the wind speed sensor 15, and the zone heating execution module 42; the controller 21 presets differentiated temperature thresholds: the heating temperature range for the coarse aggregate bin 2 is 5-12℃, and the heating temperature range for the fine aggregate bin 3 is 8-15℃.

[0029] Specifically, the controller 21 uses an STM32 microcontroller and is programmed to set temperature thresholds: the heating temperature range for the coarse aggregate bin is 5-12℃, heating is triggered when the temperature is below 5℃ and stops when it is above 12℃; the heating temperature range for the fine aggregate bin is 8-15℃, heating is triggered when the temperature is below 8℃ and stops when it is above 15℃; when the temperature difference between the surface and bottom layers of any bin exceeds 8℃, the piezoelectric micro-pump heat circulation system of the corresponding bin is automatically started to balance the temperature inside the bin; when the ambient wind speed exceeds 5m / s, the controller 21 automatically increases the heating power of the corresponding bin by 10-15% to compensate for heat loss due to strong winds.

[0030] A piezoelectric self-generated heating control method for silos in high-altitude and extremely cold mixing plants with stacked material storage, comprising the following steps: The vibration energy of aggregate loading and unloading and the vibration energy of plateau wind energy are collected by the partitioned piezoelectric energy harvesting module and converted into electrical energy. The electrical energy is then rectified and boosted by the partitioned electrical energy storage and conversion module before being stored. Real-time temperature and ambient wind speed data of coarse aggregate bins and fine aggregate bins are collected using digital temperature and wind speed sensors. The intelligent zone temperature control module independently controls the start and stop of the zone heating execution module according to the different temperature thresholds of coarse and fine aggregates; When the temperature difference between the upper and lower layers of the chamber exceeds 8°C, the piezoelectric micro-pump thermal circulation system is activated to balance the temperature. When the wind speed exceeds 5 m / s, the heating power is automatically increased to compensate for heat dissipation.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A piezoelectric self-generating heating device for silos in high-altitude, extremely cold mixing plants suitable for multi-stacking material storage, characterized in that, include: Multi-layer composite insulated warehouse (1), wherein the multi-layer composite insulated warehouse (1) is a fully enclosed structure; The compartmentalized storage silo (39) is located inside a multi-layer composite insulated silo body (1). The compartmentalized storage silo (39) is equipped with heat-insulating partitions (6) and is divided into independent coarse aggregate silos (2) and fine aggregate silos (3). The partitioned piezoelectric energy harvesting module (40) is provided with two independent units corresponding to the coarse and fine aggregate bins, which are used to collect the impact vibration energy of aggregate loading and unloading and the vibration energy of plateau wind energy and convert them into electrical energy. The partitioned energy storage and conversion module (41) is provided with two independent units corresponding to the coarse and fine aggregate bins, which are electrically connected to the piezoelectric energy harvesting module of the corresponding bin. The partitioned heating execution module (42) is provided with two independent units corresponding to the coarse and fine aggregate bins, which are electrically connected to the partitioned power storage and conversion module (41) of the corresponding bins respectively. The intelligent zone temperature control module (43) is electrically connected to the two group zone heating execution modules (42) respectively to realize independent temperature control of coarse and fine aggregates.

2. The piezoelectric self-generating heating device for silos in high-altitude, extremely cold mixing plants, as described in claim 1, is characterized in that... The multi-layer composite heat-insulating silo (1) is made of double-layer galvanized color steel plate (28). The outer layers of the double-layer galvanized color steel plate (28) are provided with windproof and heat-insulating lining (29), silo interlayer serpentine flow channel (30) and rock wool insulation layer (31) from the outside to the inside. The insulation partition (6) is made of polyurethane foam insulation material; the top of the silo is supported by welding of transverse brackets (11) and longitudinal brackets (10), and is equipped with a safety alarm device (9).

3. The piezoelectric self-generating heating device for silos in high-altitude, extremely cold mixing plants, as described in claim 1, is characterized in that... The partitioned piezoelectric energy harvesting module (40) includes: Piezoelectric vibrator (5) is fixed on the walls and bottom of the coarse aggregate bin (2) and fine aggregate bin (3), respectively. Wind energy vibration acquisition frame (12), the wind energy vibration acquisition frame (12) includes: The arc-shaped flexible piezoelectric composite material sheet (32) is welded to the base (34) and reinforced with an oblique bracket (33). A windproof and sandproof protective cover (36) is installed on its outer side.

4. The piezoelectric self-generating heating device for high-altitude and extremely cold mixing station silo suitable for separate storage according to claim 3, characterized in that, The bottom of the coarse aggregate bin (2) is evenly equipped with 20 sets of piezoelectric vibrators (5), the walls of the fine aggregate bin (3) are equipped with 3 sets of piezoelectric vibrators (5) per square meter, and the bottom of the bin is equipped with 15 sets, which are used to collect the energy generated by the vibration of loading and unloading.

5. The piezoelectric self-generating heating device for high-altitude and extremely cold mixing station silo suitable for separate storage according to claim 1, characterized in that, The partitioned energy storage and conversion module (41) includes: Low-temperature lithium battery (7), the low-temperature lithium battery (7) is electrically connected to the piezoelectric vibrator (5) and the wind energy vibration acquisition frame (12) respectively through wires (20); The converter (8) converts the generated AC power into DC power and stores it in the partitioned power storage and conversion module (41).

6. The piezoelectric self-generating heating device for high-altitude and extremely cold mixing station silo suitable for separate storage according to claim 2, characterized in that, The partitioned heating execution module (42) includes: A flexible electric heating film (17) is laid at the bottom of a compartmentalized storage silo (39); A thermal cycling system, comprising: The serpentine flow channel (30) is arranged in the multi-layer composite insulated chamber (1) and the heat transfer medium is driven to flow through it by the piezoelectric micro pump (14).

7. The piezoelectric self-generating heating device for silos in high-altitude, extremely cold mixing plants, as described in claim 1, is characterized in that... The intelligent zone temperature control module (43) includes: Digital temperature sensor (4): Three digital temperature sensors (4) are pre-embedded in the surface, middle layer and bottom layer of coarse aggregate bin (2) and fine aggregate bin (3). Wind speed sensor (15); Wind speed sensor (15) is installed on the top of the silo; The controller (21) is connected to the digital temperature sensor (4), the wind speed sensor (15), and the zoned heating execution module (42). The controller (21) presets a differentiated temperature threshold: the heating temperature range of the coarse aggregate bin (2) is 5-12℃, and the heating temperature range of the fine aggregate bin (3) is 8-15℃.

8. The piezoelectric self-generating heating device for silos in high-altitude, extremely cold mixing plants, as described in claim 3, is characterized in that... The piezoelectric vibrator (5) is a three-degree-of-freedom structure with slots (24) on all three sides. The pre-tightening encapsulation structure (25) is fixed by inserting a connecting rod (26) into the slot (24). The pre-tightening encapsulation structure (25) is provided with threaded through holes (27) for external fixation.

9. The piezoelectric self-generating heating device for high-altitude and extremely cold mixing station silo suitable for separate storage according to claim 6, characterized in that, The serpentine flow channel (30) of the compartment is connected to the piezoelectric micropump (14) through a quick connector (37), and a valve for controlling the on / off state is provided on the serpentine flow channel (30).

10. A method for controlling piezoelectric self-generated heating of silos in high-altitude, extremely cold mixing plants suitable for multi-stacking material storage, implemented based on the device described in any one of claims 1-9, characterized in that, Includes the following steps: The vibration energy of aggregate loading and unloading and the vibration energy of plateau wind energy are collected by the partitioned piezoelectric energy harvesting module and converted into electrical energy. The electrical energy is then rectified and boosted by the partitioned electrical energy storage and conversion module before being stored. Real-time temperature and ambient wind speed data of coarse aggregate bins and fine aggregate bins are collected using digital temperature and wind speed sensors. The intelligent zone temperature control module independently controls the start and stop of the zone heating execution module according to the different temperature thresholds of coarse and fine aggregates; When the temperature difference between the upper and lower layers of the chamber exceeds 8°C, the piezoelectric micro-pump thermal circulation system is activated to balance the temperature. When the wind speed exceeds 5 m / s, the heating power is automatically increased to compensate for heat dissipation.

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