Powder coating storage device

Abstract

The application provides a powder coating storage device, which comprises a container with a square cross section, a receiving space for storing powder coating formed in the container, an opening formed in the top of the container, and a height of the container greater than or equal to 300 mm; a connecting piece detachably connected with the container, the connecting piece extending upward into the receiving space from the bottom of the container; a storage cavity arranged in the connecting piece; a refrigerant filled in the storage cavity; the refrigerant is used for absorbing heat; a temperature detection piece arranged in the storage cavity and used for detecting the temperature of the refrigerant; and a display piece arranged on the outside of the container, the display piece being in signal communication with the temperature detection piece to receive and display the temperature. The refrigerant continuously absorbs the heat released by the powder coating in the receiving space, the storage environment temperature in the container is stabilized, and the powder caking and deterioration caused by high temperature are avoided.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, and in particular to a powder coating storage device. Background Technology

[0002] Powder coatings, as a core raw material in the solid coating field, are highly sensitive to the temperature and humidity of the storage environment. Industry standards clearly stipulate that the storage temperature must be stably maintained below 27°C throughout the entire process. During storage and transportation, the ambient temperature is easily affected by factors such as seasonal changes, diurnal temperature differences, and workshop operating conditions, resulting in significant fluctuations. Once the ambient temperature exceeds the limit or the temperature difference is drastic, the resin particles in the powder coating will soften and stick together, causing powder agglomeration. The powder flowability will then decrease significantly, easily leading to uneven powder output, coating thickness deviations, orange peel, pinholes, and other coating defects during spraying. If the temperature remains high, the powder will also undergo localized oxidation and cross-linking side reactions, altering the original formula performance and seriously affecting the quality of the finished coating. Agglomerated and hardened powder is more likely to clog spray guns and conveying pipelines, causing spraying equipment to jam and wear, increasing equipment maintenance costs and material losses.

[0003] Currently, most containers used for storing powder coatings are ordinary metal sealed drums or single-layer plastic storage tanks. These rely solely on the sealed lids to block moisture, and while combined with dry storage, they provide basic moisture protection but cannot withstand the effects of external temperature fluctuations, resulting in significant deficiencies in temperature control and protection. Existing improvements to powder coating packaging also focus solely on moisture protection, adding drying and adsorption structures inside the drums to absorb moisture. These solutions only provide basic moisture protection and cannot address the powder deterioration caused by high temperatures and temperature differences. Summary of the Invention

[0004] The purpose of this invention is to provide a powder coating storage device to solve the problems of the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a powder coating storage device, comprising:

[0006] A container with a square cross-section, the interior of which forms a receiving space for storing powder coating, and an opening at the top, the height of which is greater than or equal to 300 mm; A connector, detachably connected to the container, extends upward from the bottom of the container into the receiving space; the connector has a storage cavity inside. A refrigerant, which is filled in the storage cavity; the refrigerant is used to absorb heat. A temperature sensing element is disposed inside the storage cavity and is used to detect the temperature of the refrigerant; A display element is disposed on the outside of the container, and the display element is signal-connected to the temperature detection element to receive and display the temperature.

[0007] In one embodiment, with the bottom surface of the container as the height reference, the top of the connector is located at 1 / 3 to 1 / 2 of the height of the container; The connector includes a cylindrical connecting cylinder and a conductive element disposed at the top of the connecting cylinder. The conductive element is spherical and can conduct heat. The temperature detection element is disposed inside the conductive element.

[0008] In one embodiment, the connector is located at a position 1 / 3 to 1 / 2 of the length dimension of the container center along the length direction of the container, and at a position 1 / 3 to 1 / 2 of the width dimension of the container center along the width direction of the container.

[0009] In one embodiment, the lower outer wall of the connector is provided with an external thread, and the bottom wall of the container is provided with a matching threaded hole. The external thread and the threaded hole are threadedly engaged to realize the connection and the bottom wall of the container being threadedly locked and fixed. The connector is provided with a wiring interface at its bottom end, and the display is equipped with a cable, which is detachably electrically connected to the wiring interface.

[0010] In one embodiment, the display device has a preset temperature alarm threshold. When the temperature received by the display device reaches the temperature alarm threshold, the display device outputs an alarm signal, which includes an audible alarm signal and a light alarm signal.

[0011] In one embodiment, the sidewalls of the container taper inward from top to bottom, the overall diameter of the container gradually decreases from top to bottom, and multiple containers can be nested and stacked together.

[0012] In one embodiment, the powder coating storage device further includes multiple support legs disposed on the outside of the container; the support legs are detachably assembled with the container and are capable of supporting a container stacked on top of another container.

[0013] In one embodiment, the outer wall of the top of the container extends outward to form a flange, the flange and the outer wall of the container form an accommodating gap, the support leg is retracted and located inside the gap, and the support leg is detachably connected to the flange; The outer periphery of the bottom end of the support leg is provided with a stepped structure, which includes a lower limiting part and an upper supporting part. In the stacked state, the lower limiting part is received in the opening of the lower container, and the upper supporting part overlaps and supports the top of the lower container.

[0014] In one embodiment, the flange is provided with a connecting hole, and the support leg is provided with a connecting protrusion, the connecting protrusion being fitted into the connecting hole; The support leg includes a side plate that fits against the outside of the container and a bottom plate disposed at the bottom of the side plate. The inner wall of the side plate slopes inward from top to bottom, and the outer wall extends vertically. The bottom plate fits against the bottom surface of the container.

[0015] In one embodiment, the container further includes a plurality of inner bags for loading powder coating, each inner bag being disposed between the inner wall of the container and the connector; or, the container further includes an inner bag for loading powder coating, the inner bag having a receiving cavity for receiving the connector.

[0016] In one embodiment, the refrigerant is a phase change energy storage material, and the container is made of polypropylene or polyethylene plastic and is prepared by injection molding, vacuum forming or blow molding. The bottom of the container is integrally formed with several supporting feet, and all the supporting feet are arranged in a s-shaped, tan-shaped or tian-shaped array along the bottom surface of the container.

[0017] As can be seen from the above technical solution, the present invention has at least the following advantages and positive effects: The powder coating storage device of this invention continuously absorbs the heat released by the powder coating within the containment space using a refrigerant, stabilizing the internal storage temperature and preventing powder agglomeration and deterioration caused by high temperatures. Simultaneously, a temperature sensor located inside the storage cavity collects real-time refrigerant temperature data. Due to the thorough heat exchange between the refrigerant and the powder in the containment space, the refrigerant temperature directly reflects the internal storage temperature. The temperature sensor transmits the collected temperature signal to a display mounted on the outside of the container, visually displaying the real-time temperature value. Operators can quickly monitor the internal storage conditions without opening the container, achieving real-time and visualized temperature monitoring. The continuous heat exchange using the refrigerant maintains a stable internal temperature, ensuring the physical and chemical stability of the powder coating during storage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of the powder coating storage device of the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of a powder coating storage device from another perspective.

[0020] Figure 3 yes Figure 1 A cross-sectional schematic diagram of a powder coating storage device.

[0021] Figure 4 This is a schematic diagram of the powder coating storage device of the present invention without supporting legs.

[0022] Figure 5 This is a schematic diagram of the stacked structure of the two containers in this invention.

[0023] Figure 6 This is a schematic diagram of one embodiment of the support leg in this invention.

[0024] Figure 7 yes Figure 1 A schematic diagram of the stacked structure of two powder coating storage devices.

[0025] Figure 8 This is a schematic diagram of another embodiment of the powder coating storage device of the present invention.

[0026] The annotations in the attached figures are explained as follows: 1. Powder coating storage device; 11. Container; 12. Connector; 121. Connecting cylinder; 122. Conducting component; 13. Refrigerant; 14. Temperature detection component; 15. Display component; 16. Support foot; 17. Cable; 18. Support leg; 181. Step structure; 182. Connecting protrusion; 183. Side plate; 184. Base plate; 19. Flanged edge. Detailed Implementation

[0027] Although the invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the invention and is not intended to limit the invention to what is described herein.

[0028] Therefore, a feature pointed out in this specification is used to illustrate one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. While certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0029] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of the invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0030] It should be noted that when the container height for storing powder coatings is greater than or equal to 300mm, the powder coating layer is relatively high. The lower layer of powder coatings will bear a greater self-weight pressure from the upper layer, causing the powder particles to be squeezed together and increasing the contact area between particles. If the storage environment temperature is high, the surface of the powder coating particles is prone to softening. Under pressure, the particles are very likely to stick together and solidify, resulting in powder agglomeration. Agglomerated powder coatings have poor flowability, which will directly affect the subsequent spraying effect. In severe cases, it can cause discharge blockage, affecting the normal use of powder coatings.

[0031] Therefore, this application provides a powder coating storage device with a height of 300 mm or more, which integrates active cooling, temperature sensing and digital display functions, thereby improving the physical and chemical stability of powder coatings during storage.

[0032] Combination Figures 1-3 The powder coating storage device 1 includes a container 11, a connector 12, a refrigerant 13, a temperature sensor 14, and a display 15. The container 11 has a square cross-section, with an internal space for storing powder coating, and an opening at the top. The height of the container 11 is greater than or equal to 300 mm. The connector 12 is detachably connected to the container 11, extending upwards from the bottom of the container 11 into the storage space; the connector 12 has a storage cavity. The refrigerant 13 is filled into the storage cavity; the refrigerant 13 is used to absorb heat. The temperature sensor 14 is located inside the storage cavity and is used to detect the temperature of the refrigerant 13. The display 15 is located on the outside of the container 11 and is signal-connected to the temperature sensor 14 to receive and display the temperature.

[0033] The aforementioned powder coating storage device 1 continuously absorbs the heat released by the powder coating within the containment space through the refrigerant 13, stabilizing the internal storage temperature of the container 11 and preventing powder agglomeration and deterioration caused by high temperatures. Simultaneously, the temperature sensor 14 located inside the storage cavity can collect real-time temperature data of the refrigerant 13. Because the refrigerant 13 fully exchanges heat with the powder in the containment space, the temperature of the refrigerant 13 directly reflects the internal storage temperature of the container 11. The temperature sensor 14 transmits the collected temperature signal to the display 15 installed on the outside of the container 11, which visually displays the real-time temperature value. Operators can quickly grasp the internal storage conditions without opening the container 11, achieving real-time and visualized monitoring of the storage temperature. Relying on the continuous heat exchange of the refrigerant 13, the internal temperature of the container 11 is maintained stable, ensuring the physical and chemical stability of the powder coating during storage.

[0034] See Figure 4, the cross section of the container 11 is square. Specifically, the side wall of the container 11 converges inward from top to bottom, the overall caliber of the container 11 gradually decreases from top to bottom, and the upper and lower ends of the container 11 form an upper square opening and a lower square bottom surface respectively. That is, the container 11 has a quadrangular frustum structure. In this embodiment, the container 11 adopts a regular quadrangular frustum structure.

[0035] See Figure 5 , the adoption of the above structure enables that when the containers 11 are stacked for storage, the smaller bottom of the lower-layer container 11 can be fittingly clamped into the inner side of the wide upper opening of the upper-layer container 11, so as to realize nested stacking of the containers 11; in the idle state, multiple layers of the containers can be nested for storage, which greatly reduces the storage space occupation and improves the warehouse utilization rate; after the material transportation is completed, the empty containers 11 can be nested and stacked, which effectively improves the return loading rate of vehicles, reduces the waste of return transportation space, and lowers the logistics cost for the transshipment of empty containers 11.

[0036] The container 11 is made of polypropylene or polyethylene plastic, and is prepared by integral molding through injection molding, blister molding or blow molding.

[0037] A plurality of supporting feet 16 are integrally formed at the bottom of the container 11, and all the supporting feet 16 are arranged in a shape of "ri", "chuan" or "tian" array along the bottom surface of the container 11. The plurality of supporting feet 16 lift the bottom surface of the container 11 off the ground, forming a continuous ventilation and heat dissipation gap at the bottom, which facilitates the air circulation at the bottom of the container 11, reduces the accumulation of condensation on the barrel wall caused by the low temperature of the ground, and prevents moisture from infiltrating the powder coating inside the container 11 and causing moisture agglomeration. At the same time, the regular array arrangement such as the shape of "ri", "chuan" and "tian" can evenly disperse the bottom heat generated by heat exchange of the refrigerant 13, improve the overall heat dissipation uniformity of the container 11, stabilize the internal storage temperature, and further reduce the risk of powder deterioration caused by high temperature and condensation.

[0038] In this embodiment, the number of the supporting feet 16 is 9, which are arranged in a 3×3 array. Wherein, one supporting foot 16 is arranged at the exact center of the container 11.

[0039] Specifically, the supporting foot 16 is a square hollow cylinder penetrating up and down, which is in a short regular quadrangular prism structure as a whole, and both ends are open to realize up-down communication.

[0040] A storage cavity is arranged in the connecting member 12 for storing the refrigerant 13. Specifically, the connecting member 12 is in a cylindrical shape.

[0041] The connecting member 12 is detachably assembled in the container 11, which facilitates the overall replacement of the refrigerant 13 by disassembling and replacing the connecting member 12. When the refrigerant 13 is saturated by heat absorption and its energy storage and cooling performance fails, the connecting member 12 carrying the brand new refrigerant 13 can be directly replaced, without disassembling the overall structure of the container 11 or separately disassembling to fill the refrigerant 13. The operation is simple and efficient, which greatly reduces the maintenance man-hours for replacing the refrigerant 13.

[0042] The connector 12 extends vertically and is at least partially located within the containment space. With the bottom surface of the container 11 as the height reference, the top of the connector 12 is located at 1 / 3 to 1 / 2 of the height of the container 11. This height corresponds to the lower-middle core heat accumulation area of ​​the powder coating. The refrigerant 13 can specifically absorb the heat generated by the powder accumulation. Simultaneously, the heat exchange area being located in the middle of the container 11 allows for uniform heat conduction to the upper and lower powder layers, resulting in a balanced temperature field distribution within the containment space and preventing excessive local temperature differences. Compared to designs placed at the top or bottom of the container 11, this design can accommodate the temperature control needs of both the bottom and upper powder layers, fully utilizing the constant temperature buffering effect of the refrigerant 13 to stably maintain the internal storage temperature and reduce the adverse effects of temperature fluctuations on the physicochemical properties of the powder coating.

[0043] The connector 12 is positioned at a distance of 1 / 3 to 1 / 2 of the length of the container 11 from its center, and at a distance of 1 / 3 to 1 / 2 of the width of the container 11 from its center. Specifically, this means that the distance between the connector 12 and the center of the container 11 along its length is 1 / 3 to 1 / 2 of the total length of the container 11, and the distance between the connector 12 and the center of the container 11 along its width is 1 / 3 to 1 / 2 of the total width of the container 11.

[0044] The connection 12 is arranged in the central area of ​​the container 11, which is the central region of the container 11. The cold energy can be radiated evenly to the surrounding area, shortening the heat exchange distance between the refrigerant 13 stored in the connection 12 and the powder in various parts of the container 11, effectively balancing the overall temperature of the containment space and eliminating the phenomenon of local heat accumulation at the corners of the container 11. At the same time, the central area has sufficient installation space and will not occupy too much of the material filling area at the edge of the container 11, ensuring the filling volume of the powder coating.

[0045] Continue reading Figure 3 The connector 12 includes a cylindrical connector 121 and a conductive element 122 disposed at the top of the connector 121. The hollow connector 121 forms a storage cavity, which can stably hold the refrigerant 13 and prevent the refrigerant 13 from leaking. The conductive element 122 is spherical and can conduct heat. The spherical conductive element 122 has a smooth surface and no sharp edges, so it is not easy to puncture or scratch the flexible inner bag containing the powder coating during the placement and removal of the connector 12, effectively preventing powder leakage and powder deterioration due to moisture; at the same time, the spherical conductive element 122 has a larger heat exchange contact surface, which can fully contact the surrounding powder coating, efficiently conduct the heat generated by the powder accumulation, accelerate the heat transfer to the refrigerant 13 in the storage cavity, improve heat exchange efficiency, equalize the internal temperature of the containment space, alleviate the problem of local heat accumulation, and prevent the powder coating from clumping due to high temperature.

[0046] The lower outer wall of the connector 12 is provided with external threads, and a matching threaded hole is provided on the bottom wall of the container 11. The external threads and the threaded hole are threadedly engaged to achieve threaded locking and fixation between the connector 12 and the bottom wall of the container 11. The threaded connection structure is easy to assemble and disassemble, allowing for quick installation and removal of the connector 12, facilitating the overall replacement of the connector 12 carrying the refrigerant 13. The threaded locking method ensures that the connector 12 is firmly assembled vertically, preventing loosening or tilting under storage stacking and transportation bumps, maintaining the connector 12 in its preset installation position within the container 11, and ensuring stable heat exchange performance.

[0047] During assembly, the connector 12 extends upward from the bottom of the container 11 into the receiving space and is locked in place by screws.

[0048] Refrigerant 13 is filled into the storage chamber. Refrigerant 13 is used to absorb heat. Specifically, refrigerant 13 is a phase change energy storage material. The phase change energy storage material is selected from at least one of paraffin-based phase change materials, fatty acid compound phase change materials, or shaped composite phase change materials with a phase change temperature of 20℃~26℃. The above-mentioned phase change materials have good chemical stability and will not corrode the polypropylene (PP) or polyethylene (PE) container 11. When the ambient temperature is close to 27℃, a phase change occurs to absorb a large amount of heat, maintaining the internal temperature of the container 11 and inhibiting the powder coating from heating up and agglomerating. Refrigerant 13 is preferably a shaped phase change material, which can avoid liquid leakage after phase change melting and improve storage and transportation reliability.

[0049] Temperature sensing element 14 is installed inside the storage cavity to detect the temperature of refrigerant 13. The conductive element 122 at the top serves as a heat transfer medium, enabling rapid heat exchange between the powder coating and refrigerant 13. This allows the temperature of refrigerant 13 to simultaneously reflect the temperature of the powder environment inside container 11, ensuring that the temperature measurement data has reference value.

[0050] Specifically, the temperature sensing element 14 is disposed inside the conductive element 122. Therefore, it can isolate the powder coating, prevent powder adhesion and contamination of the sensing element, and extend its service life.

[0051] The display element 15 is located on the outside of the container 11. The display element 15 is connected to the temperature detection element 14 to receive and display the temperature. Therefore, the operator can quickly read the real-time temperature from the outside without opening the container 11 or disturbing the internal powder coating, which facilitates the monitoring of the temperature control operation status of the device; it also facilitates the timely identification of the working condition where the refrigerant 13 is saturated with heat and the temperature control capacity is reduced, allowing for advance arrangement of the replacement of the connector 12; at the same time, it avoids frequent opening of the lid, which would cause external moisture to enter the container 11, reducing the risk of powder coating becoming damp and clumping, and ensuring the storage stability of the powder coating.

[0052] The display component 15 and the connector 12 are connected via a cable 17. Specifically, a wiring interface is provided at the bottom of the connector 12, and the display component 15 is equipped with a cable 17, which is detachably electrically connected to the wiring interface. This detachable wiring method allows the display component 15 and the connector 12 to be separated from each other. When disassembling or replacing the connector 12, the display component 15 does not need to be disassembled together, making it easier to replace the connector 12 carrying the refrigerant 13 separately and reducing the difficulty of maintenance operations. The wiring interface is located at the bottom of the connector 12, away from the powder coating in the housing space, which can effectively avoid powder adhesion and poor interface contact, ensuring stable signal transmission. The split connection structure of the cable 17 also allows for flexible adjustment of the installation position of the display component 15 according to actual placement needs, making it convenient for staff to observe temperature data, and also facilitating the individual inspection and replacement of components, improving the overall reusability of the device.

[0053] Furthermore, the display unit 15 is preset with a temperature alarm threshold. When the temperature received by the display unit 15 reaches the temperature alarm threshold, the display unit 15 outputs an alarm signal. Therefore, the display unit 15 can compare the measured temperature data with the preset threshold in real time. When the temperature of the refrigerant 13 rises to the warning value and the temperature control capability of the device approaches its limit, an early warning is triggered, which facilitates the staff to take timely measures such as replacing the connector 12 and transferring materials.

[0054] Alarm signals include audible and visual alarm signals. Preferably, both audible and visual alarm signals are used simultaneously. This combined audible and visual alarm mode is suitable for complex operating conditions in warehouse workshops. Regardless of whether the environment is noisy or the lighting conditions are poor, it can effectively alert operators. The dual alarm system improves the reliability of early warning, facilitates rapid location of abnormal devices, and prevents powder coatings from agglomerating and deteriorating due to overheating.

[0055] The powder coating storage device 1 also includes multiple support legs 18 disposed on the outside of the container 11. The support legs 18 are detachably assembled with the container 11, and the support legs 18 are capable of supporting the top of another container 11 stacked on top of it. Figure 7 As shown, the support leg 18 provides stable support for the upper container 11, allowing the containers 11 filled with powder coating to be directly stacked. This prevents the bottom of the upper container 11 from squeezing the opening of the lower container 11, ensuring a stable stacking structure. The support leg 18 is detachable, enhancing the versatility and flexibility of the containers 11. When nested storage or empty container return transport is required, the support leg 18 can be removed to achieve nested stacking of the containers 11, fully utilizing the nesting advantages of the regular square truncated pyramid containers 11. When full-load material stacking for storage and transfer is required, assembling the support leg 18 enables heavy-duty stacking operations, adapting to various working conditions such as material storage, long-distance transportation, and idle storage, thus broadening the applicable scenarios of the device.

[0056] Specifically, the outer wall of the top of container 11 extends outward to form a flange 19. The flange 19 and the outer wall of container 11 form an accommodating gap, and the support leg 18 is housed within the gap. The support leg 18 and the flange 19 are detachably connected. The detachable connection between the support leg 18 and the flange 19 ensures a stable assembly. During stacking operations, the flange 19 bears the load of the upper layer, with the stress point located at the top of container 11, effectively dispersing the stacking pressure. At the same time, the flange 19 structure can reinforce the opening of container 11, improving the structural strength of the top of container 11. The gap can limit and protect the support leg 18, reducing damage from impacts during storage and transportation. It can accommodate both full-load stacking and empty container nesting transfer, improving the practicality of the device.

[0057] The flange 19 has a connecting hole, and the support leg 18 has a connecting protrusion 182, which is snapped into the connecting hole. The support leg 18 is engaged with the connecting hole of the flange 19 through the connecting protrusion 182, without the need for threaded fasteners, making disassembly and assembly quick and convenient; the snap-fit ​​structure ensures reliable positioning of the support leg 18, and the support leg 18 is not easy to slip outward during stacking and bearing.

[0058] Furthermore, the flange 19 has notches on both sides of the connecting protrusion 182. Under stacked load-bearing conditions, the notches provide elastic deformation buffer for the sidewall of the connecting hole, disperse the compressive stress transmitted by the support leg 18, prevent the connecting hole from bursting, and prevent the connecting protrusion 182 from locking up and jamming with the connecting hole, thus ensuring smooth long-term assembly and disassembly of the support leg 18.

[0059] Combination Figure 3 and Figure 6 The support leg 18 has a stepped structure 181 on its outer periphery at the bottom. The stepped structure 181 includes a lower limiting part and an upper bearing part. In the stacked state, the lower limiting part is housed within the opening of the lower container 11, and the upper bearing part overlaps and supports the top of the lower container 11. The lower limiting part extends into the opening of the lower container 11, achieving horizontal limiting between the stacked containers 11 and restricting horizontal displacement and sliding of the upper container 11. The upper bearing part abuts and supports the top of the lower container 11, stably bearing the vertical load of the upper container 11 and the internal powder coating. The upper and lower sections work together to achieve integrated limiting and load-bearing, effectively preventing the containers 11 from shifting and tipping over during stacking. The outer periphery refers to the outer peripheral area of ​​the support leg 18 away from the container 11.

[0060] Specifically, the support leg 18 includes a side plate 183 that fits against the outer side of the container 11 and a bottom plate 184 disposed at the bottom of the side plate 183. The inner sidewall of the side plate 183 is inclined inward from top to bottom, and the outer sidewall extends vertically. The bottom plate 184 fits against the bottom surface of the container 11. The inner sidewall of the side plate 183 is inclined inward from top to bottom, which is adapted to the inclined outer wall of the truncated square container 11. It can fit against the outer wall of the container 11 over a large area, thereby achieving circumferential positioning of the support leg 18 and preventing the support leg 18 from sliding along the surface of the container 11. The outer sidewall of the side plate 183 is arranged vertically, which can provide lateral enclosure and positioning for the upper container 11 when stacked, preventing the upper container 11 from shifting horizontally. The base plate 184 is in close contact with the bottom surface of the container 11 and can bear the vertical load of the upper container 11, evenly transferring the stacking pressure to the bottom of the container 11 and dispersing local stress. After the entire set of support legs 18 is assembled, it forms a stable load-bearing frame to ensure the safe stacking of the containers 11 filled with powder coating. After the support legs 18 are removed, the containers 11 can be nested and stored normally, taking into account both the needs of heavy-duty stacked storage and empty barrel nested transportation.

[0061] Specifically, in this embodiment, the stepped structure 181 is formed at the bottom of the side plate 183.

[0062] The number of support legs 18 is at least four, respectively located at the four corners of the container 11; in this embodiment, there are six support legs 18, one at each of the four corners, and the remaining two located at the middle of the two sets of opposite sidewalls of the container 11. This arrangement provides a stable basic load-bearing structure with the four corner support legs 18, while the additional support legs 18 at the middle of the sidewalls further distribute the stacking load, reducing local stress on the top flange 19 of the container 11 and preventing deformation under pressure. Multiple support points enhance the limiting effect of the upper container 11, reducing the risk of swaying, misalignment, and tipping of the container 11 during storage and transportation, and improving the safety of fully loaded stacking.

[0063] In other embodiments, the number of support legs 18 is four, such as... Figure 8 As shown, support legs 18 are provided only at the four corners of container 11.

[0064] The support leg 18 located at the corner is L-shaped and can fit against the adjacent side walls of the container 11. The L-shaped structure can fit against the two side walls adjacent to the corner of the container 11 at the same time, realizing bidirectional limiting and effectively preventing the support leg 18 from slipping or twisting; it adapts to the right-angle corner shape of the truncated square container 11, can cover and protect the corner of the container 11, and reduce bump damage; it increases the contact area between the support leg 18 and the container 11, improves the firmness of the support assembly, and ensures stable load transfer under stacking conditions.

[0065] In one embodiment, the powder coating storage device 1 further includes multiple inner bags for loading powder coating, each inner bag being disposed between the inner wall of the container 11 and the connector 12. The multiple inner bags are arranged in sections around the connector 12, forming gaps between them to avoid obstructing the connector 12 and ensuring sufficient heat exchange between the powder coating and the conductive component 122. Each inner bag can be operated individually during loading and unloading without moving the connector 12, reducing the risk of damage to the cable 17 and wiring interfaces.

[0066] In another embodiment, the powder coating storage device 1 further includes a single inner bag for loading the powder coating, the inner bag having a receiving cavity to accommodate the connector 12. The inner bag avoids the connector 12 through the receiving cavity, and the powder coating is distributed around the connector 12, resulting in good heat exchange conditions. The one-piece structure is easy to assemble, and the receiving cavity prevents the powder coating from accumulating at the bottom of the connector 12, effectively protecting the wiring interface and maintaining reliable temperature signal transmission.

[0067] The powder coating storage device 1 is used as follows: First, the powder coating is filled into a sealed inner bag and sealed. Then, the sealed inner bag is placed inside the powder coating storage container 11. The container 11 is then sealed and locked. The containers 11 containing the inner bags are stacked and fixed layer by layer before transportation.

[0068] During transportation, operators monitor the internal storage temperature of container 11 in real time through the display 15 on the container 11. When the temperature is observed to be consistently higher than the preset storage threshold and the temperature control capability cannot be restored to the standard range, it is determined that the refrigerant 13 circulation system is abnormal. The transport vehicle is stopped in time, the connector 12 is replaced, and then new refrigerant 13 is replaced to restore the heat exchange function of refrigerant 13 circulation, ensuring the stability of the ambient temperature of the powder coating inside container 11 and preventing the powder coating from pre-curing and clumping due to high temperature.

[0069] After being transported to the destination, the stacked containers 11 are unloaded layer by layer in a top-down order.

[0070] After the powder coating in container 11 has been unloaded or removed, container 11 is stacked empty: the assembly connection between container 11 and connector 12, and between connector 12 and display component 15, is disconnected and released. All disassembled connectors 12 are collected, stored, and placed inside one of the containers 11 for safekeeping. Then, multiple empty containers 11 are interlocked, ensuring the number of empty stacking layers does not exceed the rated limit. During stacking, collisions and compression of the outer walls and pre-reserved interfaces of container 11 are avoided. After stacking, the containers are loaded onto a vehicle for empty transport and reuse.

[0071] The powder coating storage device of the present invention has the following advantages: 1. A novel design features a vertically arranged refrigerant connector in the center of the container's containment space, absorbing heat from the powder to form a passive constant-temperature cooling system. The top of the connector is located between 1 / 3 and 1 / 2 of the container's height. This area is the center of the powder accumulation layer, where the powder's heat accumulation is most concentrated and the pressure from the upper powder's own weight is greatest. The powder is simultaneously subjected to high pressure and accumulated heat, making it highly susceptible to particle softening, adhesion, and clumping. The refrigerant, filled within the connector's internal storage cavity, continuously absorbs heat accumulated from the surrounding powder, suppressing temperature rise in the storage environment at its source. The temperature detection element is built into the spherical conductive element, isolating it from powder contamination. The refrigerant continuously exchanges heat with the surrounding powder, and its temperature changes synchronously with the ambient temperature of the powder coating. By monitoring the refrigerant temperature fluctuation, operators can accurately determine whether the internal powder is at risk of overheating, deterioration, or clumping failure. The temperature control monitoring logic is intuitive and reliable.

[0072] 2. An external display is provided on the outside of the container. The refrigerant temperature signal collected by the temperature detection device can be transmitted to the display in real time for visual display. The staff can intuitively read the internal heat exchange temperature without opening the lid and disturbing the powder or touching the powder. At the same time, the display has a built-in audible and visual alarm threshold. When the temperature exceeds the standard, it will automatically trigger a dual warning, which makes it easy for operators to quickly identify the over-temperature condition and take timely intervention measures, so as to realize the visualized temperature control of the entire powder storage process.

[0073] 3. The bottom of the connector and the bottom wall of the container adopt a threaded detachable assembly structure. When the refrigerant absorbs heat to saturation and its cooling and energy storage performance deteriorates, the connector can be unscrewed directly from the bottom of the container to replace the entire refrigerant assembly. There is no need to disassemble the container or pour out the internal powder. The refrigerant replacement operation is simple and quick, which greatly reduces equipment maintenance time, reduces disassembly and assembly losses, and extends the service life of the entire storage device.

[0074] 4. The container adopts a structure with the side walls narrowing inward from top to bottom and wider at the top and narrower at the bottom, which allows multiple containers to be nested and stacked when empty, greatly reducing the storage area of ​​empty containers and effectively improving the utilization rate of warehouse space; after the material transfer is completed, nesting and stacking empty barrels can increase the vehicle's return load capacity and reduce the logistics transfer cost of empty containers.

[0075] 5. Detachable support legs accommodate both fully loaded stacked storage and empty drum nesting transport: After filling with powder coating, the support legs are assembled, and the stepped structure of the support legs enables multi-layer containers to be limited and supported, making the stacking stable and preventing slippage and tipping; when not in use, the support legs can be removed without affecting the container nesting function, making it suitable for multiple scenarios such as raw material storage, long-distance transportation, and warehouse storage, significantly improving the device's versatility and flexibility of use.

[0076] 6. The supporting feet at the bottom of the container create ventilation gaps, reducing the risk of ground condensation and moisture. The entire device integrates multiple functions such as cooling, temperature measurement, stacking, and moisture protection. It has a robust and durable structure and is fully adapted to the requirements of large-scale, long-term safe storage of powder coatings in industrial settings.

[0077] 7. Addressing the practical pain point that the hard protrusions of the central connector can easily puncture flexible packaging bags, this invention provides two inner bag arrangement schemes: multiple independent inner bags can be used to surround the connector for partitioned powder filling, or an integrated inner bag with a dedicated accommodating cavity can be used to avoid the central connector; the multi-inner bag partition structure can disperse the powder load and avoid a single large bag squeezing and wrapping the connector, structurally eliminating the problem of powder leakage and moisture clumping caused by the sharp corners of the connector puncturing the inner bag, making the material filling and retrieval operations more in line with the actual needs of on-site production.

[0078] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A powder coating storage device, characterized in that, include: A container with a square cross-section, the interior of which forms a receiving space for storing powder coating, and an opening at the top, the height of which is greater than or equal to 300 mm; A connector that is detachably connected to the container, the connector extending upward from the bottom of the container into the receiving space; The connector has a storage cavity inside; Refrigerant, which is filled into the storage cavity; The refrigerant is used to absorb heat; A temperature sensing element is disposed inside the storage cavity and is used to detect the temperature of the refrigerant; A display element is disposed on the outside of the container, and the display element is signal-connected to the temperature detection element to receive and display the temperature.

2. The powder coating storage device according to claim 1, characterized in that, With the bottom surface of the container as the height reference, the top of the connector is located at 1 / 3 to 1 / 2 of the height of the container; The connector includes a cylindrical connecting cylinder and a conductive element disposed at the top of the connecting cylinder. The conductive element is spherical and can conduct heat. The temperature detection element is disposed inside the conductive element.

3. The powder coating storage device according to claim 1, characterized in that, The connector is located at a position 1 / 3 to 1 / 2 of the length dimension of the container center along the length direction of the container, and at a position 1 / 3 to 1 / 2 of the width dimension of the container center along the width direction of the container.

4. The powder coating storage device according to claim 1, characterized in that, The lower outer wall of the connector is provided with an external thread, and the bottom wall of the container is provided with a matching threaded hole. The external thread and the threaded hole are threadedly engaged to realize the connection and the bottom wall of the container being threadedly locked and fixed. The connector is provided with a wiring interface at its bottom end, and the display is equipped with a cable, which is detachably electrically connected to the wiring interface.

5. The powder coating storage device according to claim 1, characterized in that, The display device has a preset temperature alarm threshold. When the temperature received by the display device reaches the temperature alarm threshold, the display device outputs an alarm signal, which includes an audible alarm signal and a visual alarm signal.

6. The powder coating storage device according to claim 1, characterized in that, The sidewalls of the container taper inward from top to bottom, and the overall diameter of the container gradually decreases from top to bottom. Multiple containers can be nested and stacked together.

7. The powder coating storage device according to claim 6, characterized in that, The powder coating storage device also includes multiple support legs located on the outside of the container; the support legs are detachably assembled with the container and can support the top of another container stacked on top of it.

8. The powder coating storage device according to claim 7, characterized in that, The outer wall of the top of the container extends outward to form a flange, and the flange and the outer wall of the container form an accommodating gap. The support leg is retracted and located inside the gap, and the support leg is detachably connected to the flange. The outer periphery of the bottom end of the support leg is provided with a stepped structure, which includes a lower limiting part and an upper supporting part. In the stacked state, the lower limiting part is received in the opening of the lower container, and the upper supporting part overlaps and supports the top of the lower container.

9. The powder coating storage device according to claim 8, characterized in that, The flange is provided with a connecting hole, and the support leg is provided with a connecting protrusion, which is fitted into the connecting hole; The support leg includes a side plate that fits against the outside of the container and a bottom plate disposed at the bottom of the side plate. The inner wall of the side plate slopes inward from top to bottom, and the outer wall extends vertically. The bottom plate fits against the bottom surface of the container.

10. The powder coating storage device according to claim 1, characterized in that, It also includes multiple inner bags for loading powder coating, each inner bag being disposed between the inner wall of the container and the connector; or, it also includes an inner bag for loading powder coating, the inner bag having a receiving cavity to receive the connector.

11. The powder coating storage device according to claim 1, characterized in that, The refrigerant is a phase change energy storage material, and the container is made of polypropylene or polyethylene plastic. It is manufactured by injection molding, vacuum forming or blow molding. The bottom of the container is integrally formed with several supporting feet, and all the supporting feet are arranged in a grid pattern along the bottom surface of the container.

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