Ton bag negative pressure vacuum structure suitable for sodium ion battery negative electrode raw material

Abstract

The utility model discloses a ton bag negative pressure vacuum structure suitable for a sodium ion battery negative electrode raw material. The ton bag negative pressure vacuum structure comprises a sealing box body, an explosion venting sheet unit, a pressure release valve, a vacuum pump, a pressure gauge and a control panel, a ton bag which is to be exhausted and is filled with materials is placed in the sealing box body, the explosion venting sheet unit is installed on the side wall of the sealing box body, the vacuum pump is communicated to the sealing box body through the sealing pipeline, the pressure release valve is installed on the sealing pipeline, and the pressure gauge and the control panel are both installed on the sealing box body. According to the utility model, the sealing box body is used for emptying the air of the materials in the finished product ton bag, so that the materials are free from excess air and are in a compact state, the stacking and the transportation are convenient, the bag explosion risk in the transfer process is reduced, the material loss is reduced, and the customer complaint risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium ion battery negative electrode raw materials, in particular to a ton bag negative pressure vacuum structure suitable for sodium ion battery negative electrode raw materials. Background Art

[0002] Currently, sodium-ion batteries use hard carbon as the negative electrode raw material. This material has a simple synthesis process, is environmentally friendly and renewable, has high economic benefits, and has great potential for future development.

[0003] In existing packaging technology, hard carbon materials tend to float during packaging due to their light weight and low bulk density. Furthermore, air is introduced into the material during packaging, leaving the entire package fluffy. This leads to drawbacks: ton bags take up a lot of space, and even worse, they can explode due to bumps during transportation. This not only wastes material, increases the risk of customer complaints, and increases transportation costs. Utility Model Content

[0004] The utility model provides a ton bag negative pressure vacuum structure that reduces the probability of ton bags exploding and is safer and more standardized for use with sodium ion battery negative electrode raw materials, which can at least solve one of the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries, comprising a sealed box, an explosion relief unit, a pressure relief valve, a vacuum pump, a pressure gauge and a control panel;

[0006] The sealed box is used to place ton bags filled with materials to be vented, the explosion venting disc unit is installed on the side wall of the sealed box, the vacuum pump is connected to the sealed box via a sealed pipe, the pressure relief valve is installed on the sealed pipe, and the pressure gauge and the control panel are both installed on the sealed box;

[0007] The explosion-venting disc unit includes a fixing seat assembly, a clamping flange assembly and an explosion-venting disc body. The fixing seat assembly is a trapezoidal platform structure with a large head end at one end and a small head end at the other end. The fixing seat assembly is inserted into the sealed box through the small head end and is fixed to the sealed box through the large head end. The clamping flange assembly is fittedly installed on the inner wall of the fixing seat assembly near the large head end. The explosion-venting disc body is horizontally clamped between the clamping flange assemblies and is parallel to the wall of the sealed box.

[0008] Furthermore, the sealed box body is assembled by welding steel plates and reinforcing ribs, the welds are polished and provided with a leak-proof coating, the front of the sealed box body is hinged with a door, the edge of the door is covered with sealing strips and can be matched with the sealed box body.

[0009] Furthermore, it also includes a slope, which is detachably mounted on the front of the sealed box and contacts the bottom of the box door. The ton bag filled with materials can be pushed up or down the sealed box via the slope.

[0010] Furthermore, the pressure relief valve, the vacuum pump and the pressure gauge are respectively connected to the control panel by wire or wirelessly. The control panel is used to display the working parameters of the pressure relief valve, the vacuum pump and the pressure gauge in real time, and can change the working status of the pressure relief valve and the vacuum pump. The control panel establishes wireless communication with the remote end.

[0011] Furthermore, the fixed seat assembly includes an assembly cover and a filter cover that are integrally fixedly connected. The assembly cover is located at the large end of the fixed seat assembly, and the filter cover is located at the small end of the fixed seat assembly. The assembly cover is installed and fixed to the assembly opening pre-opened on the wall of the sealed box body, and the filter cover extends into the sealed box body.

[0012] Furthermore, the assembly cover includes an assembly return plate and an annular enclosure. The assembly return plate is horizontally arranged, and a plurality of assembly holes for assembly and fixation with the box wall of the sealed box body are evenly spaced around it. The annular enclosure is tilted and fixed along the inner circle of the assembly return plate, and the two are fixed into an integrated structure.

[0013] Furthermore, the filter cover includes an annular net and a mesh plate, the annular net is fixed along the bottom of the annular enclosure and is parallel to the annular enclosure, and the mesh plate is horizontally fixed between the annular nets and is parallel to the assembly return plate.

[0014] Furthermore, the clamping flange assembly includes a fixed flange return plate and a magnetic flange return plate. The fixed flange return plate is horizontally fitted and fixed along the inner wall of the annular enclosure and is parallel to the assembly return plate. The explosion-venting piece body is horizontally fitted and placed on the fixed flange return plate. The magnetic flange return plate can be adsorbed and fixed to the fixed flange return plate through the explosion-venting piece body, and the magnetic flange return plate is adhered to the inner wall of the annular enclosure at its periphery when it is adsorbed with the fixed flange return plate.

[0015] Furthermore, a plurality of first mounting holes and a second mounting hole are evenly spaced apart around the periphery of the fixed flange return plate and the magnetic flange return plate, and a plurality of positioning holes are evenly spaced apart around the periphery of the explosion-venting plate body. When the explosion-venting plate body is adsorbed and clamped by the fixed flange return plate and the magnetic flange return plate, the second mounting holes, the positioning holes and the first mounting holes are assembled one by one from top to bottom.

[0016] Furthermore, a large reserved tear hole is centrally provided on the explosion venting plate body, and a plurality of small reserved tear holes are evenly spaced on the outer circle cocentric with the large reserved tear hole. The small reserved tear holes are connected to the large reserved tear hole along the center of the circle to form a strip groove.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. In this utility model, a sealed box is used to exhaust the air in the finished ton bag, so that there is no excess air in the material and it is in a compact state. This not only facilitates stacking and transportation, but also reduces the risk of bag explosion during transportation, reduces material loss, and reduces the risk of customer complaints.

[0019] 2. In the utility model, the negative pressure environment inside the sealed box is easy to form, and negative pressure vacuum operation of large packaging bags can be carried out, which is free from the restrictions of packaging specifications, improves operating efficiency, meets production needs, and has a simple structure and convenient operation, free from the restrictions of complex operating procedures.

[0020] 3. In the present invention, the explosion-venting piece body is assembled on the sealed box body by the explosion-venting piece unit. On the one hand, the fixing seat assembly establishes an assembly relationship between the explosion-venting piece body and the sealed box body. By adopting a trapezoidal platform structure with one end large and the other end small, it is not only convenient for the insertion and assembly of the explosion-venting piece unit on the sealed box body, but also enables the high-pressure gas to gradually diffuse outward along the fixing seat assembly with a gradually increasing diameter. Without affecting the normal blasting of the explosion-venting piece body, the impact force damage to equipment or personnel outside the sealed box is reduced, and the safety is higher; on the other hand, the clamping flange assembly completes the fixation of the explosion-venting piece body in the fixing seat assembly. When the explosion-venting piece body is torn by blasting, the clamping flange assembly may cause associated impact and tearing damage, but it will not cause much impact and tearing damage to the fixing seat assembly, thereby reducing the impact and tearing damage to the sealed box body. After replacing the clamping flange assembly and the explosion-venting piece body, the explosion-venting piece unit can continue to be used, which helps to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0022] Figure 1 It is a side view of the overall structure of an embodiment of the utility model.

[0023] Figure 2 It is a front view of the sealed box body of the embodiment of the present utility model.

[0024] Figure 3 It is an axonometric view of the overall structure of the explosion venting piece unit of an embodiment of the present utility model.

[0025] Figure 4 It is an exploded view of the overall structure of the explosion venting piece unit of an embodiment of the present utility model.

[0026] Figure 5 It is a cross-sectional view of the overall structure of the explosion venting piece unit of an embodiment of the present utility model.

[0027] The components in the accompanying drawings are marked as follows: 1. Sealing box; 2. Explosion-venting disc unit; 3. Pressure relief valve; 4. Vacuum pump; 5. Pressure gauge; 6. Control panel; 7. Ramp; 8. Fixed seat assembly; 9. Clamping flange assembly; 10. Explosion-venting disc body; 1001. Large reserved tear hole; 1002. Strip groove; 1003. Small reserved tear hole; 1004. Positioning hole; 11. Assembly cover; 1101. Assembly return plate; 1102. Annular enclosure; 1103. Assembly hole; 12. Filter cover; 1201. Annular enclosure; 1202. Mesh plate; 13. Fixed flange return plate; 1301. First mounting hole; 14. Magnetic flange return plate; 1401. Second mounting hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), then the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, if the embodiments of the present invention involve descriptions of "first", "second", etc., then the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "multiple" refers to more than two.

[0030] See also Figure 1 and Figure 3 The embodiment of the utility model provides a negative pressure vacuum structure for ton bags of negative electrode raw materials for sodium ion batteries, comprising a sealed box 1, an explosion venting unit 2, a pressure relief valve 3, a vacuum pump 4, a pressure gauge 5 and a control panel 6;

[0031] The sealed box 1 is used to place ton bags containing materials to be vented, the explosion venting disc unit 2 is installed on the side wall of the sealed box 1, the vacuum pump 4 is connected to the sealed box 1 via a sealed pipe, the pressure relief valve 3 is installed on the sealed pipe, and the pressure gauge 5 and the control panel 6 are both installed on the sealed box 1;

[0032] The explosion-venting piece unit 2 includes a fixing seat assembly 8, a clamping flange assembly 9 and an explosion-venting piece body 10. The fixing seat assembly 8 is a trapezoidal platform structure with a large head end at one end and a small head end at the other end. The fixing seat assembly 8 is inserted into the sealed box body 1 through the small head end and is fixed to the sealed box body 1 through the large head end. The clamping flange assembly 9 is fittedly installed on the inner wall of the fixing seat assembly 8 near the large head end. The explosion-venting piece body 10 is horizontally clamped between the clamping flange assemblies 9 and is parallel to the wall surface of the sealed box body 1.

[0033] In the utility model, a sealed box is used to exhaust the air in the finished ton bag, so that there is no excess air in the material and it is in a compact state, which is not only convenient for stacking and transportation, but also reduces the risk of bag explosion during transportation, reduces material loss, and reduces the risk of customer complaints; in addition, the negative pressure environment inside the sealed box is easy to form, and negative pressure vacuum operation of large packaging bags can be carried out, breaking away from the restrictions of packaging specifications, improving operating efficiency, meeting production needs, and having a simple structure and convenient operation, breaking away from the restrictions of complex operating procedures.

[0034] See also Figure 1 In this embodiment, the sealed box body 1 is made of steel plates and reinforcing ribs welded together, the welds are polished and provided with a leak-proof coating, and a door is hinged on the front of the sealed box body 1. The door is coated with sealing strips along the edges and can be matched with the sealed box body 1. With this design, the sealed box body 1 serves as a negative pressure vacuum working environment for exhausting ton bags filled with materials (mainly the negative electrode raw materials of sodium ion batteries, i.e., hard carbon in this application). It should ensure the overall robustness, surface smoothness, and airtight integrity of its own structure to avoid any damage or scratches to the ton bags during operation, and more importantly, avoid negative effects on the negative pressure vacuum operation.

[0035] See also Figure 1 and Figure 2In this embodiment, a ramp 7 is further included. The ramp 7 is detachably mounted on the front of the sealed box 1 and contacts the bottom of the door. The ton bag filled with materials can be pushed up or down the sealed box 1 via the ramp 7. With this design, the ton bag filled with materials and not exhausted can be transported to the front of the ramp 7 with the assistance of transportation equipment such as a ground bull, and then slide up along the ramp 7 into the sealed box 1. The staff will open the sealing mouth of the ton bag and then close the door to ensure that a sealed chamber environment with airtightness that meets the standard is formed inside the sealed box 1. Then, the negative pressure vacuum operation will be started to evacuate the air inside the sealed box 1 to form a negative pressure environment, forcing the air inside the ton bag to be discharged. The pressure is maintained for 3-5 minutes, and the pressure relief valve 3 and the door are opened. , and then the staff will close the sealing mouth of the ton bag and fold it in half, and then slide it out along the slope 7 to complete the unloading, and repeat the negative pressure vacuum operation of the next ton bag. In the above operation, the running time of the vacuum pump 4 is set according to the actual operation requirements, and the size of the negative pressure is determined according to the size of the ton bag and the actual production situation. After the above process, the air mixed in the material in the ton bag can be effectively discharged (estimated to be 60%-80%), and the material in the ton bag is in a compact state, which is not only convenient for stacking and transportation, but also effectively reduces the risk of explosion.

[0036] See also Figure 1 and Figure 2 In this embodiment, the pressure relief valve 3, the vacuum pump 4, and the pressure gauge 5 are each connected to the control panel 6 by wire or wireless. The control panel 6 is used to display the operating parameters of the pressure relief valve 3, the vacuum pump 4, and the pressure gauge 5 in real time, and can change the operating status of the pressure relief valve 3 and the vacuum pump 4. The control panel 6 establishes wireless communication with the remote terminal. With this design, the operating status, operating parameters, and other operating data of the operating equipment installed on the sealed box 1, such as the pressure relief valve 3, the vacuum pump 4, and the pressure gauge 5, can be controlled on-site by the staff via the control panel 6, or remotely by the staff via the remote terminal. The remote terminal can be a mobile phone or a PC, and the specific form is not particularly limited in this application.

[0037] See also Figure 3-Figure 5In this embodiment, the fixed seat assembly 8 includes an integrally fixed assembly cover 11 and a filter cover 12. The assembly cover 11 is located at the large end of the fixed seat assembly 8, and the filter cover 12 is located at the small end of the fixed seat assembly 8. The assembly cover 11 is installed and fixed to the assembly opening pre-opened on the wall of the sealed box body 1, and the filter cover 12 extends into the sealed box body 1. Designed in this way, the fixing seat assembly 8 is used to establish an assembly relationship between the explosion-venting piece body 10 and the sealed box body 1. By adopting a trapezoidal platform structure with one end large and the other end small, it is not only convenient for the insertion and assembly of the explosion-venting piece unit 2 on the sealed box body 1, but also a filter cover 12 with a grid structure is set at the small head end of the fixing seat assembly 8, so that the high-pressure gas in the sealed box body 1 can smoothly pass through the filter cover 12 and rush out from the assembly cover 11 with a larger diameter, which does not affect the explosion of the explosion-venting piece body 10, and also allows the high-pressure gas to gradually diffuse outward along the fixing seat assembly 8 with a gradually increasing diameter, thereby reducing the impact force on equipment or personnel outside the assembly port of the sealed box body 1.

[0038] See also Figure 3-Figure 5 In this embodiment, the assembly cover 11 includes an assembly return plate 1101 and an annular enclosure 1102. The assembly return plate 1101 is horizontally arranged, and a plurality of assembly holes 1103 for assembly and fixation with the wall of the sealed box body 1 are evenly spaced around it. The annular enclosure 1102 is tilted and fixed along the inner circle of the assembly return plate 1101, and the two are fixed into an integrated structure. With this design, the assembly return plate 1101 is in a circular shape with an opening in the middle. The annular enclosure 1102 is fixed along the opening in the middle of the assembly return plate 1101, and the cross-section of the annular enclosure 1102 is trapezoidal, with one end fixed to the opening of the assembly return plate 1101 being a large-diameter end, and the other end being a small-diameter end. In this way, when the explosion-proof plate unit 2 is installed, the assembly return plate 1101 is fitted to the outer wall of the sealed box body 1 and fixed to match the reserved assembly opening. Obviously, the maximum diameter of the annular enclosure 1102 is equal to the inner ring diameter of the assembly return plate 1101, that is, the maximum diameter of the annular enclosure 1102 is smaller than the diameter of the reserved assembly opening, so that the annular enclosure 1102 can be easily inserted into the sealed box body 1, making the installation and disassembly of the explosion-proof plate unit 2 more convenient.

[0039] See also Figure 3-Figure 5In this embodiment, the filter cover 12 includes an annular net 1201 and a mesh plate 1202. The annular net 1201 is fixed along the bottom of the annular enclosure 1102 and is parallel to the annular enclosure 1102. The mesh plate 1202 is horizontally fixed between the annular nets 1201 and is parallel to the assembly return plate 1101. In this design, the annular fence 1201 is connected and fixed to the annular enclosure plate 1102, and the calibers of the two are gradually reduced from the annular enclosure plate 1102 to the annular fence 1201. The mesh plate 1202 is fixed to the inner circle of the annular fence 1201 and is fixed to the annular fence 1201 to form an integrated structure. In this way, the fixing seat assembly 8 extends into the bottom surface of the sealed box body 1 and the bottom end connected to the bottom surface, both of which are hollow mesh structures, which can increase the impact path or impact area of ​​the high-pressure gas and ensure that the explosion-proof plate body 10 can be smoothly torn by the impact, and can also block the fragments generated by the explosion-proof plate body 10 after the explosion, and avoid the fragments from falling into the sealed box body 1 as much as possible.

[0040] See also Figure 3-Figure 5 In this embodiment, the clamping flange assembly 9 includes a fixed flange return plate 13 and a magnetic flange return plate 14. The fixed flange return plate 13 is horizontally fitted and fixed along the inner wall of the annular enclosure 1102 and is parallel to the assembly return plate 1101. The explosion-proof plate body 10 is horizontally fitted and placed on the fixed flange return plate 13. The magnetic flange return plate 14 can be adsorbed and fixed to the fixed flange return plate 13 through the explosion-proof plate body 10, and the magnetic flange return plate 14 is adhered to the inner wall of the annular enclosure 1102 at its periphery when adsorbed with the fixed flange return plate 13. In this design, the fixed flange return plate 13 is fixed to the inner wall of the annular enclosure 1102 and close to the assembly return plate 1101, and the explosion-venting piece body 10 is horizontally fitted and placed on the fixed flange return plate 13. Subsequently, the magnetic flange return plate 14 is horizontally fitted and placed on the explosion-venting piece body 10. The magnetic flange return plate 14 and the fixed flange return plate 13 are adsorbed, fixed and clamped to the explosion-venting piece body 10. In this way, the clamping flange assembly 9 completes the fixation of the explosion-venting piece body 10, and then, when the When high-pressure gas leaks from the sealed box 1 and impacts the explosion-venting piece body 10 outward, the explosion-venting piece body 10 may cause associated impact and tearing damage to the clamping flange assembly 9 while blasting and tearing. However, it will not cause much impact and tearing damage to the fixing seat assembly 8, especially the assembly cover 11, thereby reducing the impact and tearing damage to the sealed box 1 and the reserved assembly port. After replacing the clamping flange assembly 9 and the explosion-venting piece body 10, the explosion-venting piece unit 2 can continue to be used, thereby reducing costs.

[0041] See also Figure 3-Figure 4 In this embodiment, a plurality of first mounting holes 1301 and a second mounting hole 1401 are evenly spaced apart around the periphery of the fixed flange return plate 13 and the magnetic flange return plate 14, and a plurality of positioning holes 1004 are evenly spaced apart around the periphery of the explosion-venting piece body 10. When the explosion-venting piece body 10 is adsorbed and clamped by the fixed flange return plate 13 and the magnetic flange return plate 14, the second mounting holes 1401, the positioning holes 1004 and the first mounting holes 1301 are assembled one by one from top to bottom. With such a design, when the explosion-venting piece body 10 is assembled with the clamping flange assembly 9, it slides along the annular enclosure 1102 to fit into the fixed flange return plate 13, and the positioning hole 1004 corresponds one-to-one with the first mounting hole 1301. Then, the magnetic flange return plate 14 is slid along the annular enclosure 1102 to fit into the explosion-venting piece body 10, and is adsorbed and fixed to the fixed flange return plate 13. At this time, the second mounting hole 1401 corresponds one-to-one with the positioning hole 1004 and the first mounting hole 1301, and is assembled and fastened using fixing parts such as screws or rivets, thereby improving the fixing and clamping effect of the clamping flange assembly 9 on the explosion-venting piece body 10.

[0042] See also Figure 3-Figure 4 In this embodiment, the explosion venting disc body 10 has a centrally located large pre-set tear hole 1001. Multiple small pre-set tear holes 1003 are evenly spaced around the outer circle, concentric with the large pre-set tear hole 1001. These small pre-set tear holes 1003 connect to the large pre-set tear hole 1001 along the center of the circle to form a strip groove 1002. This design ensures that when the explosion venting disc body 10 is impacted by high-pressure gas, it ruptures along the predetermined trajectory: large pre-set tear hole 1001 → strip groove 1002 → small pre-set tear holes 1003, reducing the risk of accidental explosions.

[0043] In summary, in the present invention, a sealed box is used to exhaust the air in the finished ton bag, so that there is no excess air in the material and it is in a compact state, which is not only convenient for stacking and transportation, but also reduces the risk of bag explosion during transportation, reduces material loss, and reduces the risk of customer complaints; in addition, in the present invention, a negative pressure environment is easily formed inside the sealed box, and negative pressure vacuum operations can be performed on large packaging bags, which is free from the restrictions of packaging specifications, improves operating efficiency, meets production needs, and has a simple structure, convenient operation, and is free from the restrictions of complex operating procedures.

[0044] At the same time, in the present invention, the explosion-venting piece body is assembled on the sealed box body by the explosion-venting piece unit. On the one hand, the fixing seat assembly establishes an assembly relationship between the explosion-venting piece body and the sealed box body. By adopting a trapezoidal platform structure with one end large and the other end small, it is not only convenient for the insertion and assembly of the explosion-venting piece unit on the sealed box body, but also enables the high-pressure gas to gradually diffuse outward along the fixing seat assembly with a gradually increasing diameter. Without affecting the normal blasting of the explosion-venting piece body, the impact force damage to equipment or personnel outside the sealed box is reduced, and the safety is higher; on the other hand, the clamping flange assembly completes the fixation of the explosion-venting piece body in the fixing seat assembly. When the explosion-venting piece body is torn, it may cause associated impact and tearing damage to the clamping flange assembly, but it will not cause much impact and tearing damage to the fixing seat assembly, thereby reducing the impact and tearing damage to the sealed box body. After replacing the clamping flange assembly and the explosion-venting piece body, the explosion-venting piece unit can continue to be used, which helps to reduce costs.

[0045] It should be understood that the examples and implementation methods described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries, characterized in that: It comprises a sealed box (1), an explosion relief disc unit (2), a pressure relief valve (3), a vacuum pump (4), a pressure gauge (5) and a control panel (6); The sealed box (1) is used to place ton bags containing materials to be vented, the explosion venting disc unit (2) is installed on the side wall of the sealed box (1), the vacuum pump (4) is connected to the sealed box (1) via a sealed pipe, the pressure relief valve (3) is installed on the sealed pipe, and the pressure gauge (5) and the control panel (6) are both installed on the sealed box (1); The explosion venting disc unit (2) comprises a fixing seat assembly (8), a clamping flange assembly (9) and an explosion venting disc body (10); the fixing seat assembly (8) is a trapezoidal platform structure with a large end at one end and a small end at the other end; the fixing seat assembly (8) is inserted into the sealed box (1) through the small end and fixed to the sealed box (1) through the large end; the clamping flange assembly (9) is fitted on the inner wall of the fixing seat assembly (8) near the large end; the explosion venting disc body (10) is horizontally clamped between the clamping flange assemblies (9) and is parallel to the wall surface of the sealed box (1).

2. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 1, characterized in that: The sealed box body (1) is made of steel plates and reinforcing ribs welded together, the welds are polished and provided with a leak-proof coating, the front of the sealed box body (1) is hinged with a box door, the edges of the door are covered with sealing strips and can be matched with the sealed box body (1).

3. The negative pressure vacuum structure for ton bags of negative electrode raw materials for sodium ion batteries according to claim 2, characterized in that: The invention also includes a ramp (7) which is detachably mounted on the front of the sealed box (1) and contacts the bottom of the box door. Ton bags filled with materials can be pushed up or down the sealed box (1) via the ramp (7).

4. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 1, characterized in that: The pressure relief valve (3), the vacuum pump (4) and the pressure gauge (5) are respectively connected to the control panel (6) by wire or wirelessly. The control panel (6) is used to display the working parameters of the pressure relief valve (3), the vacuum pump (4) and the pressure gauge (5) in real time, and can change the working status of the pressure relief valve (3) and the vacuum pump (4). The control panel (6) establishes wireless communication with the remote end.

5. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 1, characterized in that: The fixing seat assembly (8) comprises an assembly cover (11) and a filter cover (12) which are fixedly connected in an integral manner. The assembly cover (11) is located at the large end of the fixing seat assembly (8), and the filter cover (12) is located at the small end of the fixing seat assembly (8). The assembly cover (11) is fixed to an assembly opening pre-opened on the wall of the sealed box (1), and the filter cover (12) extends into the sealed box (1).

6. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 5, characterized in that: The assembly cover (11) comprises an assembly return plate (1101) and an annular enclosure (1102); the assembly return plate (1101) is arranged horizontally and has a plurality of assembly holes (1103) evenly spaced around the periphery for assembly and fixation with the box wall of the sealed box body (1); the annular enclosure (1102) is fixed along the inner circle of the assembly return plate (1101) at an angle, and the two are fixed into an integrated structure.

7. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 6, characterized in that: The filter cover (12) includes an annular net (1201) and a mesh plate (1202), wherein the annular net (1201) is fixed along the bottom of the annular plate (1102) and is parallel to the annular plate (1102), and the mesh plate (1202) is horizontally fixed between the annular nets (1201) and is parallel to the assembly return plate (1101).

8. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 6, characterized in that: The clamping flange assembly (9) includes a fixed flange return plate (13) and a magnetic flange return plate (14), the fixed flange return plate (13) is horizontally fitted and fixed along the inner wall of the annular enclosure (1102) and is parallel to the assembly return plate (1101), the explosion venting plate body (10) is horizontally fitted and placed on the fixed flange return plate (13), the magnetic flange return plate (14) can be adsorbed and fixed to the fixed flange return plate (13) through the explosion venting plate body (10), and the magnetic flange return plate (14) is in a state of being adsorbed to the fixed flange return plate (13), and its periphery is fitted to the inner wall of the annular enclosure (1102).

9. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 8, characterized in that: The fixed flange return plate (13) and the magnetic flange return plate (14) are respectively provided with a plurality of first mounting holes (1301) and a second mounting hole (1401) at even intervals around the periphery, and the explosion venting plate body (10) is provided with a plurality of positioning holes (1004) at even intervals around the periphery. When the explosion venting plate body (10) is adsorbed and clamped by the fixed flange return plate (13) and the magnetic flange return plate (14), the second mounting holes (1401), the positioning holes (1004) and the first mounting holes (1301) are assembled one by one from top to bottom.

10. The negative pressure vacuum structure for tons of bags of negative electrode raw materials for sodium ion batteries according to claim 1, characterized in that: The explosion venting plate body (10) is provided with a large reserved tear hole (1001) in the center, and a plurality of small reserved tear holes (1003) are evenly spaced and distributed on the outer circle cocentric with the large reserved tear hole (1001), and the small reserved tear holes (1003) are connected to the large reserved tear hole (1001) along the center of the circle to form a strip groove (1002).

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