Foldable and recyclable power metering box

Abstract

The application provides a foldable and circulating electric power metering box, and relates to the technical field of electric power metering boxes.The electric power metering box comprises a metering box body, a mounting rack is fixedly installed in the inner wall of the metering box body, every air hole is equidistantly formed in the side walls of the metering box body, every air cavity is symmetrically formed in the inner wall of the metering box body, every air cavity is communicated with every air hole, a sliding groove is formed in the inside of every air cavity, a protection mechanism is arranged on the metering box body, the protection mechanism comprises an air pipe and a protection air bag, an installation groove is formed in the upper end of a folding box, an insertion slot is formed in the inside of the installation groove, a storage slot is formed in the side wall of the folding box, a limiting slot is formed in the inner wall of the storage slot, a first box door is slidably installed in the inside of the storage slot, and a limiting block is fixedly installed on the side wall of the first box door.The electric power metering box can greatly reduce the overall volume of the metering box, significantly reduce the occupation of the loading space of a transport vehicle and the storage area of a warehouse during the transfer of the electric power metering box, and reduce the space cost of transportation and storage.

Description

Technical Field

[0001] This invention belongs to the field of power metering box technology, and more specifically, relates to a foldable and reusable power metering box. Background Technology

[0002] The smart grid, with informatization, automation, and interactivity at its core, emphasizes precise control over power flow, information flow, and business flow. As the connection hub between the user end and the power grid, the power metering box, through the integration of technologies such as intelligent sensing and wireless communication, can not only realize the traditional power metering function, but also collect refined data such as voltage fluctuations, load changes, and power factor in real time, and remotely transmit the information to the power grid dispatch center, providing underlying data support for the "state awareness" of the smart grid.

[0003] However, existing smart grid power metering boxes still have the following shortcomings in use:

[0004] 1. Traditional power metering boxes are still mainly fixed structure boxes in scenarios such as multi-circuit power distribution and outdoor temporary power use. These boxes are difficult to compress further in terms of thickness and width to accommodate the installation and wiring of adaptable components. Moreover, due to their fixed shape, they cannot be folded and stored, resulting in low space utilization during bulk transportation and storage.

[0005] 2. When the existing metering box is in operation, the weak parts of the box body are directly exposed. When it is bumped or collided during transportation, the outer shell is easily deformed and the internal components (such as metering instruments and wiring terminals) are damaged due to rigid contact.

[0006] 3. Traditional metering boxes often have doors designed to open in the same direction (e.g., all opening to the same side) or a single-door cover design, which means that maintenance of the upper and lower layers requires alternating operations and cannot be carried out synchronously. When one person is performing maintenance, the door needs to be opened and closed frequently to avoid obstacles. When multiple people are performing maintenance together, operational interference is likely to occur, prolonging maintenance time. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a foldable and reusable electricity metering box.

[0008] A foldable and reusable power metering box includes a metering box body, an mounting frame fixedly installed in the inner wall of the metering box body, air holes equally spaced on both side walls of the metering box body, air chambers symmetrically arranged in the inner wall of the metering box body, each air chamber communicating with each air hole, a sliding groove provided inside each air chamber, and a protective mechanism provided on the metering box body;

[0009] The protective mechanism includes air tubes and protective airbags. Each air tube is installed in a one-to-one correspondence with each air hole. The two protective airbags are installed on the two sets of air tubes and are attached to the side walls of the metering box to protect the metering box.

[0010] Preferably, each of the air chambers has a slidably installed extrusion strip, each of the extrusion strips has an inner groove, each of the inner grooves has a slidably installed wedge-shaped inner rod, and each of the wedge-shaped inner rods has a nitrile rubber layer fixedly installed on its side wall.

[0011] Preferably, a second spring is fixedly installed on the end of each wedge-shaped inner rod away from the nitrile rubber layer, and the end of each second spring away from each wedge-shaped inner rod is fixedly connected to the inner wall of each inner groove. A slide bar is fixedly installed on the side wall of each extrusion strip, and each slide bar is slidably installed in each groove.

[0012] Preferably, a third spring is fixedly installed on the side wall of each slide bar, and the end of each third spring away from each slide bar is fixedly connected to the inner wall of each slide groove.

[0013] Preferably, a fixing strip is fixedly installed at the lower end of the inner wall of the metering box, and strip grooves are symmetrically opened at the upper end of the fixing strip. Limiting strips are slidably installed inside the two strip grooves, and sealing strips are fixedly installed on the opposite ends of the two limiting strips.

[0014] Preferably, a first spring is fixedly installed at equal intervals at the lower ends of the two limiting strips, and the ends of the two sets of first springs away from the two limiting strips are respectively fixedly connected to the inner walls of the two strip grooves.

[0015] Preferably, a folding box is rotatably installed inside the metering box. The upper end of the folding box has an installation groove, and the installation groove has a slot. The side wall of the folding box has a storage groove, and the inner wall of the storage groove has a limiting groove.

[0016] Preferably, a first door is slidably installed inside the storage slot, a limiting block is fixedly installed on the side wall of the first door, the limiting block is slidably installed in the limiting groove, a plug is fixedly installed at the upper end of the first door, an annular groove is opened on the plug, a rotating ring is rotatably installed on the annular groove, and the rotating ring is adapted to the slot.

[0017] Preferably, a second door is hinged to the side wall of the folding box, and rectangular frames are evenly and equidistantly fixed on the end of the folding box away from the second door. Each rectangular frame has rectangular grooves on both side walls, and a silicone rubber block is slidably installed inside each rectangular frame.

[0018] Preferably, a fourth spring is fixedly installed on each of the silicone rubber blocks, and the end of each fourth spring away from the silicone rubber block is fixedly connected to the folding box. A slider is fixedly installed on both side walls of each silicone rubber block, and each group of sliders is slidably installed in each group of rectangular grooves.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this invention, a metering box body, mounting groove, slot, storage groove, first box door, limiting block, insert post, annular groove, and rotating ring are provided. When the first box door moves, the limiting block will slide upward in the limiting groove. At this time, the first box door will also drive the insert post and rotating ring to move upward. When the rotating ring slides out of the slot, it can rotate inside the annular groove. When the rotating ring rotates inside the mounting groove until it is misaligned with the slot, it will be positioned. At this time, the first box door is completely retracted into the storage groove. Then, the folding box can be rotated clockwise. The folding box will rotate 180° clockwise and fold into the metering box body, completing the folding. This can significantly reduce the overall volume of the metering box, significantly reduce the space occupied by the power metering box in the transport vehicle and the warehouse storage area during transportation, and reduce the space cost of transportation and storage.

[0021] In this invention, a metering box body, an air vent, an air chamber, an air tube, a protective airbag, a compression strip, an inner groove, a wedge-shaped inner rod, a nitrile rubber layer, a second spring, a slider, a third spring, and a folding box are provided. The movement of the slider compresses the third spring. When the compression strip reaches its final position within the air chamber, the folding box compresses the nitrile rubber layer and the wedge-shaped inner rod. The nitrile rubber layer and the wedge-shaped inner rod then slide within the inner groove, compressing the second spring. The sliding of the compression strip forces air from inside the air chamber into the air tube inside the air vent. Then, the air is injected into the protective airbag through the trachea. At this time, the protective airbag inflates and adheres to the side wall of the metering box for protection. When the folding box is reset and flipped to the top of the metering box, the second and third springs will return to their original deformation. At this time, the compression strip and the slide strip will also reset, thereby drawing out the air from the protective airbag and deflating it to adhere to the side wall of the metering box. This design achieves folding protection through pneumatic linkage, which significantly reduces the risk of box deformation and component damage caused by direct impact during the transportation of the metering box.

[0022] In this invention, a strip groove, a limiting strip, a first spring, and a folding box are provided. When the limiting strip is subjected to compressive force, it will slide downward in the strip groove. The movement of the limiting strip will cause the first spring to be compressed. When the folding box is folded, the first spring will recover its deformation and drive the limiting strip to reset after the extrusion of the folding box is removed. At this time, the limiting strip can limit the folding box after it is folded, making the metering box more stable after it is flipped over. This prevents it from accidentally flipping over and unfolding due to bumps, vibrations, or external force during transportation, thus enhancing stability.

[0023] In this invention, a metering box body, a mounting frame, a folding box, and a silicone rubber block are provided. After the box is flipped over, the silicone rubber block will come into contact with the electronic components inside the mounting frame. At this time, the silicone rubber block will deform under force, thus wrapping the electronic components installed on the mounting frame. The electronic components inside the folding box are protected by the metering box body, and the electronic components on the mounting frame are protected by the silicone rubber block. This effectively avoids loosening of connections due to vibration or slight collisions during equipment transportation, ensuring the stability of signal or power transmission between electronic components, thereby ensuring the metering accuracy and overall operational reliability of the power metering box, and extending the service life of the electronic components.

[0024] In this invention, a metering box body, a mounting frame, a folding box, a storage slot, a first box door, and a second box door are provided. When the equipment needs maintenance, the second box door can be opened to inspect the electronic components inside the folding box. When inspecting the mounting frame, step one can be repeated to retract the first box door into the storage slot for inspection. By designing the second box door and the storage slot to be in opposite directions, the maintenance of the folding box and the metering box body can be carried out simultaneously, greatly shortening the maintenance time and ensuring the quality of maintenance. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the exploded structure of the folding box connection of the present invention;

[0027] Figure 3 This is a schematic diagram of the exploded structure of the first door connection of the present invention;

[0028] Figure 4 This is a schematic diagram of the silicone rubber block connection structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the exploded structure of the rotating ring connection of the present invention;

[0030] Figure 6 This is a schematic diagram of the exploded structure of the rectangular frame connection of the present invention;

[0031] Figure 7 This is a schematic diagram of the protective airbag connection explosion structure of the present invention;

[0032] Figure 8 This is an exploded view of the mounting bracket connection structure of the present invention;

[0033] Figure 9 This is a schematic diagram of the exploded structure of the slider connection of the present invention;

[0034] Figure 10 This is a schematic diagram of the exploded structure of the fixing strip connection of the present invention;

[0035] Figure 11 This is the present invention. Figure 8 Enlarged structural diagram at point A in the middle.

[0036] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 1. Metering box body; 2. Mounting bracket; 3. Air vent; 4. Air chamber; 5. Slide groove; 6. Air pipe; 7. Protective airbag; 8. Fixing strip; 9. Strip groove; 10. Limiting strip; 11. First spring; 12. Sealing strip; 13. Extrusion strip; 14. Inner groove; 15. Wedge-shaped inner rod; 16. Nitrile rubber layer; 17. Second spring; 18. Slide bar; 19. Third spring; 21. Folding box; 22. Mounting groove; 23. Slot; 24. Storage groove; 25. First box door; 26. Limiting block; 27. Insert post; 28. Annular groove; 29. ​​Rotating ring; 31. Rectangular frame; 32. Rectangular groove; 33. Silicone rubber block; 34. Fourth spring; 35. Slider; 36. Second box door. Detailed Implementation

[0037] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0038] Please see Figures 1-11 The present invention provides a foldable and reusable power metering box, including a metering box body 1, an mounting frame 2 fixedly installed in the inner wall of the metering box body 1, an air hole 3 equally spaced on both side walls of the metering box body 1, an air chamber 4 symmetrically opened in the inner wall of the metering box body 1, each air chamber 4 being connected to each air hole 3, a sliding groove 5 opened inside each air chamber 4, and a protective mechanism provided on the metering box body 1;

[0039] The protective mechanism includes air tubes 6 and protective airbags 7. Each air tube 6 is installed in a one-to-one correspondence with each air hole 3. Two protective airbags 7 are installed on the two sets of air tubes 6 respectively and are attached to the side walls of the metering box 1 to protect the metering box 1. Each air chamber 4 has a slidably installed extrusion strip 13. Each extrusion strip 13 has an inner groove 14. Each inner groove 14 has a slidably installed wedge-shaped inner rod 15. Each wedge-shaped inner rod 15 has a nitrile rubber layer 16 fixedly installed on its side wall. A second spring 17 is fixedly installed on the end of each wedge-shaped inner rod 15 away from the nitrile rubber layer 16. The end of each second spring 17 away from each wedge-shaped inner rod 15 is fixedly connected to the inner wall of each inner groove 14. A slide bar 18 is fixedly installed on the side wall of each extrusion strip 13. Each slide bar 18 is slidably installed in each slide groove 5. A third spring 19 is fixedly installed on the side wall of each slide bar 18. The end of each third spring 19 away from each slide bar 18 is fixedly connected to the inner wall of each slide groove 5. The metering box body 1... A fixing strip 8 is fixedly installed at the lower end of the inner wall. A strip groove 9 is symmetrically formed at the upper end of the fixing strip 8. Limiting strips 10 are slidably installed inside each of the two strip grooves 9. Sealing strips 12 are fixedly installed on the opposite ends of each of the two limiting strips 10. First springs 11 are fixedly installed at equal intervals at the lower ends of each of the two limiting strips 10. The ends of the two sets of first springs 11 away from the two limiting strips 10 are respectively fixedly connected to the inner walls of the two strip grooves 9. A folding box 21 is rotatably installed inside the metering box body 1. When the folding box 21 is folded, it will interact with the limiting strips 10. First, when the limiting strip 10 is subjected to the squeezing force, it will slide downward in the strip groove 9. The movement of the limiting strip 10 will cause the first spring 11 to be compressed. When the folding box 21 is folded, the first spring 11 will return to its original shape and drive the limiting strip 10 to reset after the squeezing force of the folding box 21 is lost. At this time, the limiting strip 10 can limit the folding box 21 after folding, so that the metering box is more stable after flipping, preventing it from accidentally flipping and unfolding due to bumps, vibrations or external force during transportation, thus enhancing stability.When the folding box 21 is folded over, it will come into contact with the nitrile rubber layer 16, creating friction between them. The nitrile rubber layer 16 then causes the extrusion strip 13 and the slide strip 18 to slide in the air cavity 4 and the slide groove 5, respectively. The movement of the slide strip 18 will compress the third spring 19. When the extrusion strip 13 reaches its final position inside the air cavity 4, the folding box 21 will compress the nitrile rubber layer 16 and the wedge-shaped inner rod 15. The nitrile rubber layer 16 and the wedge-shaped inner rod 15 will slide inside the inner groove 14 and compress the second spring 17. The sliding of the extrusion strip 13 will expel the air from inside the air cavity 4. The air is squeezed into the air tube 6 inside the air hole 3, and then injected into the protective airbag 7 through the air tube 6. At this time, the protective airbag 7 is inflated and attached to the side wall of the metering box 1 for protection. When the folding box 21 is reset and flipped to the top of the metering box 1, the second spring 17 and the third spring 19 will restore their deformation. At this time, the compression strip 13 and the slide strip 18 will also be reset, thereby drawing out the air inside the protective airbag 7 and deflating it to adhere to the side wall of the metering box 1. This design achieves folding protection through pneumatic linkage, which significantly reduces the risk of box deformation and component damage caused by direct impact during the transportation of the metering box.

[0040] The upper end of the folding box 21 has a mounting groove 22, and the inside of the mounting groove 22 has a slot 23. The side wall of the folding box 21 has a storage groove 24, and the inner wall of the storage groove 24 has a limit groove. The first box door 25 is slidably installed inside the storage groove 24. The side wall of the first box door 25 is fixedly installed with a limit block 26, which is slidably installed in the limit groove. The upper end of the first box door 25 has a fixed insertion post 27, and the insertion post 27 has an annular groove 28. A rotating ring 29 is rotatably installed on the annular groove 28, and the rotating ring 29 is adapted to the slot 23. When the power metering box needs to be folded, the first box door 25 can be slid upward inside the storage groove 24. The movement of the first box door 25 will drive the limit. Block 26 then slides upward in the limiting groove. At this time, the first box door 25 will also drive the insert post 27 and the rotating ring 29 to move upward. After the rotating ring 29 slides out of the slot 23, it can rotate inside the annular groove 28. When the rotating ring 29 rotates inside the mounting groove 22 until it is misaligned with the slot 23, it will be positioned. At this time, the first box door 25 is completely retracted into the storage groove 24. Then, the folding box 21 can be rotated clockwise. At this time, the folding box 21 will rotate the slider 180° clockwise and fold into the metering box body 1, completing the folding. This can greatly reduce the overall volume of the metering box, significantly reduce the space occupied by the power metering box in the transport vehicle and the warehouse storage area during transportation, and reduce the space cost of transportation and storage.

[0041] A second door 36 is hinged to the side wall of the folding box 21. When the equipment needs maintenance, the second door 36 can be opened to inspect the electronic components inside the folding box 21. When inspecting the mounting frame 2, step one can be repeated to retract the first door 25 into the storage slot 24 before inspection. By designing the second door 36 and the storage slot 24 to be in opposite directions, the maintenance of the folding box 21 and the metering box 1 can be carried out simultaneously, which greatly shortens the maintenance time and ensures the maintenance quality.

[0042] Rectangular frames 31 are evenly and equidistantly fixedly installed on the end of the folding box 21 away from the second door 36. Each rectangular frame 31 has rectangular slots 32 on both side walls. A silicone rubber block 33 is slidably installed inside each rectangular frame 31. A fourth spring 34 is fixedly installed on each silicone rubber block 33, and the end of each fourth spring 34 away from the silicone rubber block 33 is fixedly connected to the folding box 21. A slider 35 is fixedly installed on both side walls of each silicone rubber block 33. Each set of sliders 35 is slidably installed in each set of rectangular slots 32. When in use, the second door 36 can be opened to install electronic components on the inner wall of the folding box 21 and the inner wall of the mounting frame 2. When the rectangular frame 31 and the silicone rubber block 33 are flipped, they will also flip. After the flip is completed, the silicone rubber block 33 will come into contact with the electronic components inside the mounting frame 2. At this time, the silicone rubber block 33 will deform under the force, wrapping the electronic components installed on the mounting frame 2. At this time, the electronic components inside the folding box 21 are protected by the metering box body 1, and the electronic components on the mounting frame 2 are protected by the silicone rubber block 33. This effectively avoids loosening of the connection due to vibration, slight collision, etc. during equipment transportation, and ensures the stability of signal or power transmission between electronic components, thereby ensuring the metering accuracy and overall operational reliability of the power metering box and extending the service life of the electronic components.

[0043] Working principle:

[0044] The first step is to slide the first door 25 upward inside the storage slot 24 when the electricity metering box needs to be folded. The movement of the first door 25 will drive the limiting block 26 to slide upward in the limiting slot. At this time, the first door 25 will also drive the insert 27 and the rotating ring 29 to move upward. After the rotating ring 29 slides out of the slot 23, it can rotate inside the annular groove 28. When the rotating ring 29 rotates inside the mounting slot 22 until it is misaligned with the slot 23, it will be positioned. At this time, the first door 25 is completely retracted into the storage slot 24. Then, the folding box 21 can be rotated clockwise. The folding box 21 will rotate the slider 180° clockwise and fold into the metering box body 1, completing the folding. This can greatly reduce the overall volume of the metering box, significantly reduce the space occupied by the electricity metering box in the transport vehicle and the warehouse storage area during transportation, and reduce the space cost of transportation and storage.

[0045] In the second step, when the folding box 21 is folded over, it will come into contact with the nitrile rubber layer 16, creating friction between them. The nitrile rubber layer 16 then causes the extrusion strip 13 and the slide strip 18 to slide in the air cavity 4 and the slide groove 5, respectively. The movement of the slide strip 18 will compress the third spring 19. When the extrusion strip 13 reaches its final position inside the air cavity 4, the folding box 21 will compress the nitrile rubber layer 16 and the wedge-shaped inner rod 15. The nitrile rubber layer 16 and the wedge-shaped inner rod 15 will slide inside the inner groove 14 and compress the second spring 17. The sliding of the extrusion strip 13 will further compress the air inside the air cavity 4. Air is forced into the air pipe 6 inside the air hole 3, and then injected into the protective airbag 7 through the air pipe 6. At this time, the protective airbag 7 inflates and adheres to the side wall of the metering box 1 for protection. When the folding box 21 is reset and flipped to the top of the metering box 1, the second spring 17 and the third spring 19 will restore their deformation. At this time, the compression strip 13 and the slide strip 18 will also be reset, thereby drawing out the air inside the protective airbag 7 and deflating it to adhere to the side wall of the metering box 1. This design achieves folding protection through pneumatic linkage, which significantly reduces the risk of box deformation and component damage caused by direct impact during the transportation of the metering box.

[0046] Third, when the folding box 21 is folded, it will first come into contact with the limiting strip 10. When the limiting strip 10 is subjected to the squeezing force, it will slide downward in the strip groove 9. The movement of the limiting strip 10 will drive the first spring 11 to be compressed. When the folding box 21 is folded, the first spring 11 will recover its deformation and drive the limiting strip 10 to reset. At this time, the limiting strip 10 can limit the folding box 21 after folding, so that the metering box is more stable after flipping, preventing it from accidentally flipping and unfolding due to bumps, vibrations or external force during transportation, thus enhancing stability.

[0047] Fourth, when put into use, the second box door 36 can be opened to install electronic components on the inner wall of the folding box 21 and the inner wall of the mounting frame 2. When the folding box 21 is flipped, the rectangular frame 31 and the silicone rubber block 33 will also flip. After the flipping is completed, the silicone rubber block 33 will come into contact with the electronic components inside the mounting frame 2. At this time, the silicone rubber block 33 will deform under the force, wrapping the electronic components installed on the mounting frame 2. At this time, the electronic components inside the folding box 21 are protected by the metering box body 1, and the electronic components on the mounting frame 2 are protected by the silicone rubber block 33. This effectively avoids the loosening of the connection caused by vibration, slight collision, etc. during equipment transportation, and ensures the stability of signal or power transmission between electronic components, thereby ensuring the metering accuracy and overall operational reliability of the power metering box and extending the service life of electronic components.

[0048] Fifth, when the equipment needs maintenance, the second door 36 can be opened to inspect the electronic components inside the folding box 21. When inspecting the mounting frame 2, step one can be repeated to retract the first door 25 into the storage slot 24 before inspection. By designing the second door 36 and the storage slot 24 to be in opposite directions, the inspection of the folding box 21 and the metering box 1 can be carried out simultaneously, greatly shortening the maintenance time and ensuring the quality of maintenance.

[0049] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A foldable and reusable electricity metering box, comprising a metering box body (1), wherein a mounting frame (2) is fixedly installed in the inner wall of the metering box body (1), characterized in that: Multiple air holes (3) are equally spaced on both sides of the metering box body (1). Multiple air chambers (4) are symmetrically opened in the inner wall of the metering box body (1). Each air chamber (4) is connected to each air hole (3). Each air chamber (4) has a sliding groove (5) inside. A protective mechanism is provided on the metering box body (1). The protective mechanism includes air pipes (6) and protective airbags (7). Each air pipe (6) is installed in correspondence with each air hole (3). The two protective airbags (7) are installed on the two sets of air pipes (6) and are attached to the outside of the side walls of the metering box (1) to protect the metering box (1). Each of the air chambers (4) is slidably fitted with an extrusion strip (13), and each of the extrusion strips (13) is provided with an inner groove (14). Each of the inner grooves (14) is slidably installed with a wedge-shaped inner rod (15), and a nitrile rubber layer (16) is fixedly installed on the side wall of each wedge-shaped inner rod (15). A second spring (17) is fixedly installed on the end of each wedge-shaped inner rod (15) away from the nitrile rubber layer (16), and the end of each second spring (17) away from each wedge-shaped inner rod (15) is fixedly connected to the inner wall of each inner groove (14); Each of the extrusion strips (13) is fixedly installed with a slide bar (18) on its side wall, and each slide bar (18) is slidably installed in each slide groove (5); A third spring (19) is fixedly installed on the side wall of each of the sliders (18); In this case, one end of each third spring (19) away from each slide bar (18) is fixedly connected to the inner wall of each slide groove (5); The metering box body (1) is rotatably mounted with a folding box (21). The upper end of the folding box (21) is provided with an installation groove (22), and the installation groove (22) is provided with a slot (23). The folding box (21) has a storage slot (24) on its side wall, and a limiting groove is provided in the inner wall of the storage slot (24); When the folding box is flipped and folded, it will contact the nitrile rubber layer. The nitrile rubber layer will cause the extrusion strip and the slide strip to slide in the air cavity and the slide groove, respectively. The movement of the slide strip will cause the third spring to be compressed. When the extrusion strip moves to the end inside the air cavity, the folding box will squeeze the nitrile rubber layer and the wedge-shaped inner rod. The nitrile rubber layer and the wedge-shaped inner rod will slide inside the inner groove and squeeze the second spring to compress it. The sliding of the extrusion strip will squeeze the air inside the air cavity into the air tube inside the air hole, and then inject it into the protective airbag through the air tube. At this time, the protective airbag will inflate and adhere to the side wall of the metering box for protection. When the folding box is flipped back to the top of the metering box, the second spring and the third spring will return to their original deformation. At this time, the extrusion strip and the slide strip will also return to their original position, thereby drawing out the air inside the protective airbag and deflating it to adhere to the side wall of the metering box.

2. The foldable and reusable power metering box as described in claim 1, characterized in that, A fixing strip (8) is fixedly installed on the lower end of the inner wall of the metering box (1), and a strip groove (9) is symmetrically opened on the upper end of the fixing strip (8). Among them, limit strips (10) are slidably installed inside the two strip grooves (9), and sealing strips (12) are fixedly installed on the opposite ends of the two limit strips (10).

3. The foldable and reusable power metering box as described in claim 2, characterized in that, The lower ends of the two limiting bars (10) are each fixedly installed with a first spring (11) at equal intervals. Among them, the ends of the two sets of first springs (11) away from the two limiting strips (10) are respectively fixedly connected to the inner walls of the two strip grooves (9).

4. The foldable and reusable power metering box as described in claim 1, characterized in that, The storage slot (24) has a first box door (25) slidably installed inside, and a limit block (26) is fixedly installed on the side wall of the first box door (25). The limit block (26) is slidably installed in the limit slot. The first box door (25) is fixedly installed with a plug (27) at the upper end. An annular groove (28) is provided on the plug (27). A rotating ring (29) is rotatably installed on the annular groove (28). The rotating ring (29) is adapted to the slot (23).

5. The foldable and reusable power metering box as described in claim 1, characterized in that, A second door (36) is hinged to the side wall of the folding box (21), and a rectangular frame (31) is evenly and equidistantly fixed on the end of the folding box (21) away from the second door (36). Each of the rectangular frames (31) has rectangular grooves (32) on both side walls, and each of the rectangular frames (31) has a silicone rubber block (33) slidably installed inside.

6. The foldable and reusable power metering box as described in claim 5, characterized in that, Each of the silicone rubber blocks (33) is fixedly installed with a fourth spring (34), and the end of each fourth spring (34) away from the silicone rubber block (33) is fixedly connected to the folding box (21); Each of the silicone rubber blocks (33) has a slider (35) fixedly installed on both sides of its sidewalls, and each set of sliders (35) is slidably installed in each set of rectangular grooves (32).

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