Labyrinth type scrap steel packing block structure and manufacturing mold

Abstract

The utility model discloses a labyrinth type scrap steel packing block structure and a manufacturing die, and relates to the technical field of scrap steel packing blocks and scrap steel smelting. The labyrinth type waste steel packing block structure comprises a waste steel packing block with holes, through holes are formed in the waste steel packing block with the holes, a closed cavity used for being filled with fuel is formed in the waste steel packing block with the holes, and the through holes are communicated with the closed cavity through a labyrinth structure. And the labyrinth structure is used for introducing molten steel in the through hole into the closed cavity in the steelmaking process of the steel scrap packaging block with the hole. According to the labyrinth type waste steel packing block structure and the manufacturing method, on the basis of a waste steel packing block with holes and a closed cavity, the time for molten steel to enter the closed cavity can be accelerated and controlled in the mode that the labyrinth structure is additionally arranged between the holes and the closed cavity, and then the smelting efficiency of the waste steel packing block with the holes in waste steel smelting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scrap steel packaging blocks and scrap steel smelting, in particular to a labyrinth type scrap steel packaging block structure and a manufacturing mould. Background Art

[0002] In order to improve the scrap ratio in the steel production process, Professor Chen Linquan conducted theoretical calculations and analyses on the melting of scrap steel in molten iron and molten steel, and conducted field verification. The melting process of scrap steel in molten iron is usually at a temperature of 1250℃ to 1500℃, while the melting point of scrap steel is above 1500℃. Because the melting point of scrap steel is higher than the temperature of molten iron, according to the thermodynamic model and experiment of scrap steel melting, the melting process of scrap steel in molten iron is considered to be as follows: In the early stage of melting, the temperature difference between scrap steel and molten iron is large, and molten iron solidifies on the surface of scrap steel to form a solidified layer; as time goes by, the temperature of scrap steel rises, and the solidified layer on the surface begins to melt; carbon in molten iron transfers to the surface of scrap steel to form a carburized layer; the temperature of scrap steel continues to rise, the carbon content on the surface of scrap steel increases, and the melting point decreases; when the melting point of the carburized layer on the surface of scrap steel is lower than the temperature of the molten pool, the scrap steel melts to form a liquid. Then the scrap steel surface repeats solidification → carburization → melting until all the scrap steel is melted. Therefore, the limiting link in the melting of scrap steel in molten iron is the mass transfer of carbon on the surface of the scrap steel.

[0003] Scrap steel can be made into blocks for easy storage, transportation, and recovery from the furnace for reuse, and the loss is extremely low. It is an effective way to process scrap steel. However, the scrap steel blocks are large in size and dense inside, which is not conducive to heat transfer, mass transfer, conduction, convection, and radiation, and it is also not conducive to personnel observing the internal composition of the scrap steel.

[0004] Currently, there is a method of adding fuel to the converter, but when the scrap steel is smelted, the fuel will float directly to the surface of the molten steel and cannot fully contact the scrap steel and generate heat, thereby reducing the smelting efficiency of the scrap steel.

[0005] Although the prior art, such as the invention with application number CN202210398966.X, discloses a metal packaging block and a pressing mold, pressing equipment, and method, in which a metal packaging block structure with a through hole and a closed cavity is used to improve the heat transfer effect in the scrap steel smelting process, and adding the fuel required for smelting in the closed cavity can also make the fuel fully contact and generate heat, further improving the smelting efficiency of the scrap steel, but in actual use, the molten steel needs to melt the wall of the closed cavity before it can contact and react with the fuel in the closed cavity, thereby delaying the time for the fuel to participate in smelting. When the wall thickness is uncertain, the uncertainty of the time for the fuel to participate in smelting is increased, thereby reducing the smelting efficiency of the scrap steel. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the shortcomings of the prior art, the utility model provides a labyrinth-type scrap steel packaging block structure and a manufacturing mold, which solves the following technical problems:

[0008] 1. In the prior art, the scrap steel package with a closed cavity needs to wait for the molten steel to melt the closed cavity wall before the fuel in the closed cavity can participate in the smelting process, which is not conducive to improving the smelting efficiency;

[0009] 2. The toothed maze is not easy to press on the harder scrap steel packing blocks;

[0010] 3. It is difficult to control the time when molten steel enters the closed cavity in the long pipe maze.

[0011] (II) Technical solution

[0012] To achieve the above objectives, the utility model is implemented through the following technical solutions: a maze-type scrap steel packaging block structure, including a scrap steel packaging block with holes, the scrap steel packaging block with holes is provided with a through hole, the scrap steel packaging block with holes is provided with a closed cavity for filling fuel, the through hole and the closed cavity are connected through a maze structure, and the maze structure is used to pass the molten steel in the through hole into the closed cavity during the steelmaking process of the scrap steel packaging block with holes.

[0013] Preferably, the maze structure is a toothed maze.

[0014] Preferably, the maze structure is a multi-curve maze.

[0015] Preferably, a limited flow section is provided on the multi-bend maze.

[0016] Preferably, the flow limiting node is a conical flow limiting node or a truncated cone flow limiting node.

[0017] Preferably, the multi-curve maze comprises a plurality of interconnected pipes, the sum of the lengths of the plurality of pipes in the vertical direction is greater than the length of the closed cavity, and the sum of the lengths of the plurality of pipes in the horizontal direction is greater than the diameter of the closed cavity.

[0018] (III) Beneficial effects

[0019] The utility model provides a labyrinth-type scrap steel packing block structure and a manufacturing mold, which has the following beneficial effects:

[0020] (1) The labyrinth-type scrap steel packing block structure and manufacturing mold are based on the scrap steel packing block with holes and closed cavities. The method of adding a labyrinth structure between the holes and the closed cavity can speed up and control the time for molten steel to enter the closed cavity, thereby improving the smelting efficiency of the scrap steel packing block with holes in scrap steel smelting.

[0021] (2) The structure and manufacturing mold of the maze-type scrap steel packaging block adopt a curved maze, which is convenient for pressing on metal packaging blocks of harder materials.

[0022] (3) The maze-type scrap steel packaging block structure and manufacturing mold add a flow limiting section on the basis of the curved maze, which can further improve the control of the time for molten steel to enter the closed cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the main view of the existing perforated scrap steel packaging block;

[0024] Figure 2 This is a cross-sectional view of an existing perforated scrap steel packing block;

[0025] Figure 3 This is the lower half front view of the existing perforated scrap steel packing block;

[0026] Figure 4 It is a top view of the lower half of the existing perforated scrap steel packing block;

[0027] Figure 5 This is the main view of the existing perforated scrap steel packaging block mold;

[0028] Figure 6 It is a top view of the existing scrap steel packaging block mold with holes;

[0029] Figure 7 This is a top view of the lower half of the maze-type scrap steel packaging block of the utility model (curved maze);

[0030] Figure 8 This is a top view of the lower half of the maze-type scrap steel packaging block of the utility model (tooth-shaped maze);

[0031] Fig. 9 This is a top view of the lower half of the maze-type scrap steel packaging block of the utility model (a curved maze with a limited flow section);

[0032] Fig.10 This is a schematic diagram of the curved maze structure;

[0033] Fig.11 This is the front view of the maze-type scrap steel packaging block mold of the utility model (curved maze);

[0034] Fig.12 This is a bottom view of the maze-type scrap steel packaging block mold of the utility model (curved maze);

[0035] Fig.13 This is the front view of the maze-type scrap steel packaging block mold of the utility model (a curved maze with a limited flow section);

[0036] Fig.14This is a bottom view of the maze-type scrap steel packaging block mold of the utility model (a curved maze with a limited flow section);

[0037] Fig.15 This is the front view of the maze-type scrap steel packaging block mold of the utility model (a symmetrically arranged toothed maze);

[0038] Fig.16 This is a bottom view of the maze-type scrap steel packaging block mold of the utility model (a symmetrically arranged toothed maze);

[0039] Fig.17 This is a cross-sectional view of a maze-type scrap steel packaging block of the utility model (a symmetrically arranged toothed maze);

[0040] Fig.18 This is the front view of the maze-type scrap steel packaging block mold of the utility model (a tooth-shaped maze arranged on one side);

[0041] Fig.19 This is a bottom view of the maze-type scrap steel packaging block mold of the utility model (a tooth-shaped maze arranged on one side);

[0042] Fig. 20 This is a cross-sectional view of a labyrinth-type scrap steel packaging block of the utility model (a toothed labyrinth arranged on one side);

[0043] Fig.21 It is a schematic diagram of the pressing process of the maze-type scrap steel packaging block of the utility model.

[0044] In the figure: 1, scrap steel packing block with holes; 11, upper half of scrap steel packing block with holes; 111, mounting groove A; 112, mounting block A; 12, lower half of scrap steel packing block with holes; 121, mounting block B; 122, mounting groove B; 13, through hole; 131, semicircular groove; 14, closed cavity A; 141, closed cavity groove A; 15, closed cavity B; 151, closed cavity groove B;

[0045] 2. Mold; 21. Mounting block pressing groove; 22. Mounting groove pressing block; 23. Through hole pressing block; 24. Closed cavity pressing block A; 25. Closed cavity pressing block B; 26. Labyrinth structure pressing module; 27. Current limiting section pressing block; 28. Toothed labyrinth pressing block;

[0046] 3. Labyrinth structure; 31a, first horizontal channel; 31b, first vertical channel; 32a, second horizontal channel; 32b, second vertical channel; 33a, third horizontal channel; 33b, third vertical channel; 34a, fourth horizontal channel; 34b, fourth vertical channel;

[0047] 4. Current limiting section. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] The cross-sectional dimensions of the metal packaged blocks pressed in the following embodiments and comparative examples are all 0.8m*1.2m, and the lengths are all 1.2m. The diameters of the through holes 131 and the closed cavities are 10cm. The number of through holes 13 is one, the number of closed cavities is two, the length of the closed cavities is not less than 0.6m, the initial carbon content is 0.1%, the through hole 131 is arranged at the center of the cross section of the metal packaged block, and the closed cavity is 20cm away from the axis of the through hole 13. The mounting block adopts a triangular prism, and the mounting groove adopts a triangular prism groove. The height of the triangular prism is 5cm, and the bottom of the triangular prism is 4cm. The triangular prism and the triangular prism groove have an interference fit or a transition fit. The content of the heat-generating element C in coke is 85%, the initial temperature of the metal packaged block is 25°C, and coke is added during the converter smelting process in a mass ratio of 0.59:1000 to the metal packaged block.

[0050] like Figure 1 to Figure 6 The perforated scrap steel packing block 1 in the following embodiments and comparative examples comprises a perforated scrap steel packing block upper half 11 and a perforated scrap steel packing block lower half 12; the bottom of the perforated scrap steel packing block upper half 11 and the top of the perforated scrap steel packing block lower half 12 are both provided with a semicircular groove 131, and the positions of the semicircular groove 131 at the bottom of the perforated scrap steel packing block upper half 11 and the semicircular groove 131 at the top of the perforated scrap steel packing block lower half 12 correspond to each other and can be combined into a through hole 13; the bottom of the perforated scrap steel packing block upper half 11 and the top of the perforated scrap steel packing block lower half 12 are both provided with Closed cavity groove, the closed cavity groove at the bottom of the upper half 11 of the scrap steel packaging block with holes corresponds to the position of the closed cavity groove at the top of the lower half 12 of the scrap steel packaging block with holes and can be combined into a closed cavity; the left and right sides of the bottom of the upper half 11 of the scrap steel packaging block with holes are respectively provided with a mounting groove A111 and a mounting block A112, and the left and right sides of the top of the lower half 12 of the scrap steel packaging block with holes are respectively provided with a mounting block B121 and a mounting groove B122, and the mounting groove A111 and the mounting block A112 can be respectively matched and connected with the mounting block B121 and the mounting groove B122.

[0051] Comparative Example 1: Metal packing block with application number CN202210398966.X

[0052] Example 1: Metal packing block using toothed maze

[0053] A labyrinth-type scrap steel packaging block structure comprises a scrap steel packaging block 1 with a hole, the scrap steel packaging block 1 with a hole is provided with a through hole 13, a closed cavity for filling fuel is provided in the scrap steel packaging block 1 with a hole, the through hole 13 is connected with the closed cavity through a labyrinth structure 3, and the labyrinth structure 3 is used to pass the molten steel in the through hole 13 into the closed cavity during the steelmaking process of the scrap steel packaging block 1 with a hole.

[0054] in:

[0055] like Figure 8 The labyrinth structure 3 is a toothed labyrinth, which includes a flow channel and a plurality of flow-blocking strips arranged in the flow channel. During the converter smelting process, the molten steel first quickly enters the through hole 13 and then slowly passes through the toothed labyrinth into the closed cavity to react with the fuel in the closed cavity.

[0056] The processing of the toothed maze can be performed by pressing, and the bottom of the pressing mold 2 is provided with a mounting block pressing groove 21, a through hole pressing block 23, a closed cavity pressing block, a mounting groove pressing block 22 and a maze structure pressing module 26; the mounting block pressing groove 21 is used to press the mounting groove A111 and the mounting groove B122; the through hole pressing block 23 is used to press the semicircular groove 131; the closed cavity pressing block is used to press the closed cavity groove; the maze structure pressing module 26 is used to press the maze structure 3.

[0057] The pressing mold and pressing method in this embodiment are best suitable for softer metal packaging blocks, because the structure of the toothed maze is relatively small compared to the entire metal packaging block. It may not be possible to press out a better toothed maze on a too hard metal packaging block, and the influence of the gaps in the metal packaging block itself must also be considered. If the toothed maze occupies a small proportion of the volume of the entire metal packaging block, then the gaps in the metal packaging block itself will have a greater impact on the toothed maze.

[0058] like Fig.21 , the compression process is as follows:

[0059] The characteristic surfaces of the upper half 11 of the scrap steel packing block with holes and the lower half 12 of the scrap steel packing block with holes are the bottom surface and the top surface respectively, and the steps are as follows:

[0060] Step 1: Use mold 2 to press two pieces of scrap steel packaging blocks with characteristic surfaces;

[0061] Step 2: Place one of the scrap steel packages on top of another scrap steel package;

[0062] Step 3: flip the scrap steel packing block located on the upper side in the vertical direction, where the scrap steel packing block located on the upper side is the upper half 11 of the scrap steel packing block with holes, and the scrap steel packing block located on the lower side is the lower half 12 of the scrap steel packing block with holes;

[0063] Step 4: Connect the upper half 11 of the scrap steel packing block with holes and the lower half 12 of the scrap steel packing block with holes through the mounting groove A111, the mounting block A112, the mounting block B121 and the mounting groove B122.

[0064] In this embodiment, the labyrinth structure pressing module 26 can be arranged on one side or both sides of the through hole pressing block 23 .

[0065] When set on both sides, such as Figure 15 to Figure 17 , the maze structure 3 was pressed out into two pairs and spliced ​​together.

[0066] When set on one side, such as Figures 18 to 20 , a pair of maze structures 3 were pressed out but not spliced ​​together, but instead were fitted together with the flat part of the other half of the packaging block.

[0067] The upper half 11 of the scrap steel packing block with holes and the lower half 12 of the scrap steel packing block with holes are both pressed by the mold 2, and the maze structure does not need to be completely assembled and spliced, so it is possible to set the maze structure pressing module 26 on one side of the through-hole pressing block 23. The technical purpose of setting it on one side is to simplify the complexity of the mold and reduce the maintenance cost of the mold.

[0068] Example 2: Metal packing block using a multi-curve maze

[0069] This embodiment is proposed to solve the technical problem that the toothed labyrinth in Embodiment 1 is not easy to be pressed on a harder metal packaging block.

[0070] The difference between this embodiment and embodiment 1 is that the labyrinth structure 3 is a multi-bend labyrinth, which is equivalent to that the flow channel can be of a larger diameter (easier to press and can also reduce the influence of the gaps in the metal packing block itself), and then the speed of molten steel entering the closed cavity is slowed down by extending the length of the channel.

[0071] Among them: a better requirement for the multi-turn maze is that the multi-turn maze includes multiple interconnected pipes, the sum of the lengths of the multiple pipes in the vertical direction is greater than the length of the closed cavity, and the lengths of the multiple pipes in the horizontal direction are greater than the diameter of the closed cavity.

[0072] like Fig.10 , the sum of the lengths of all horizontal channels (including the first horizontal channel 31a, the second horizontal channel 32a, the third horizontal channel 33a and the fourth horizontal channel 34a) is greater than the diameter of the closed cavity, and the sum of the lengths of all vertical channels (including the first vertical channel 31b, the second vertical channel 32b, the third vertical channel 33b and the fourth vertical channel 34b) is greater than the length of the closed cavity.

[0073] Fig.10It is just a setting method of a multi-turn maze. In order to facilitate the calculation of the horizontal and vertical lengths of each pipe, only horizontal channels (no length in the vertical direction) and vertical channels (no length in the horizontal direction) are intentionally set. You can also choose an inclined channel (with length in both horizontal and vertical directions). In this embodiment, it is just a way of arrangement and placement. Other channel arrangements that can achieve the technical purpose of this embodiment should also be within the protection scope of this utility model.

[0074] The difference between this embodiment and the embodiment 1 in the manufacturing mold is that the labyrinth structure pressing module 26 is used to press a multi-curve labyrinth. The pressing process is similar to that of the embodiment 1.

[0075] Embodiment 3: Adding a metal packing block with a current limiting node 4

[0076] The curved maze in Example 2 delays the entry of molten steel into the closed cavity by extending the flow path of molten steel, but the length of the pipeline maze cannot be extended indefinitely to control the time for molten steel to enter the closed cavity, so this example is proposed.

[0077] On the basis of Example 2, this embodiment adds a flow limiting joint 4 on the flow channel of the bend maze. The flow limiting joint 4 can be a conical flow limiting joint or a truncated cone flow limiting joint. The flow limiting joint will melt after encountering the high temperature of the molten steel. As the melting range of the flow limiting joint expands, the flow limiting effect of the flow limiting joint gradually weakens, and thus the control of the time for the molten steel to flow into the closed cavity can be further improved through this structure. In actual use, those skilled in the art can select the number and type of flow limiting joints as needed. The conical flow limiting joint can be regarded as a flow limiting joint with a closed inlet, and the truncated cone flow limiting joint can be regarded as a flow limiting joint with a small inlet and a large outlet. The conical flow limiting joint requires the molten steel to melt out of the through hole at the closed inlet before the molten steel can enter. The truncated cone flow limiting joint allows the molten steel to enter directly, and then as the melting degree of the flow limiting joint structure increases, the flow rate of the molten steel entering is increased.

[0078] The difference between this embodiment and the embodiment 2 in the manufacturing mold is that a limited flow section pressing block 27 is provided on the labyrinth structure pressing module 26. The pressing process is similar to the embodiment 1.

[0079] The following table shows the smelting conditions of the metal packages of Comparative Examples 1 to 3 and Examples 1 to 2 (the values ​​in the following table are the average values ​​of the melting time of 4 identical packages)

[0080] Example Metal pack melting time Comparative Example 1 240s Example 1 220s Example 2 220s Example 3 230s

[0081] In Examples 1 to 3, since the molten steel can enter the closed cavity earlier than in Comparative Example 1 and react with the fuel in the closed cavity, Examples 1 to 3 all have higher melting rates.

[0082] Although the length of the labyrinth structure used in Example 2 is longer than that of Example 1, the flow area of ​​the labyrinth structure of Example 2 is larger, so overall, the melting speeds of Example 1 and Example 2 are basically the same. However, since the labyrinth structure of Example 2 is easier to manufacture (press), Example 2 is a better embodiment.

[0083] The difference between Example 3 and Example 2 is that a current limiting section is added. Although the current limiting section delays the time for the molten steel to enter the closed cavity, the setting of the current limiting section makes it possible to more accurately control the time for the molten steel to enter the closed cavity.

[0084] It should be noted that, in the description of the utility model, the terms "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the description of the structure of the utility model shown in the accompanying drawings, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0085] The "first" and "second" in this technical solution are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have a ranking, comparison of size, or other meanings.

[0086] In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two structures. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood based on the overall idea of ​​the utility model and the specific context of the scheme.

Claims

1. A labyrinth-type scrap steel packing block structure, comprising a scrap steel packing block with holes (1), wherein the scrap steel packing block with holes (1) is provided with a through hole (13), and wherein a closed cavity for filling fuel is provided inside the scrap steel packing block with holes (1), characterized in that: The through hole (13) is connected to the closed cavity via a labyrinth structure (3), and the labyrinth structure (3) is used to pass molten steel in the through hole (13) into the closed cavity during the steelmaking process of the perforated scrap steel package (1).

2. The labyrinth type scrap steel packaging block structure according to claim 1, characterized in that: The maze structure (3) is a tooth-shaped maze.

3. The labyrinth type scrap steel packaging block structure according to claim 1, characterized in that: The maze structure (3) is a multi-curve maze.

4. The labyrinth type scrap steel packaging block structure according to claim 3, characterized in that: A limited flow node (4) is provided on the multi-bend maze.

5. The labyrinth type scrap steel packaging block structure according to claim 4, characterized in that: The flow limiting joint (4) is one of a conical flow limiting joint and a truncated cone flow limiting joint.

6. The labyrinth type scrap steel packaging block structure according to claim 3, characterized in that: The multi-curve maze includes a plurality of interconnected pipes, the sum of the lengths of the plurality of pipes in the vertical direction is greater than the length of the closed cavity, and the lengths of the plurality of pipes in the horizontal direction is greater than the diameter of the closed cavity.

7. A labyrinth type scrap steel packaging block structure according to any one of claims 1 to 6, characterized in that: The perforated scrap steel bale block (1) comprises an upper half (11) of the perforated scrap steel bale block and a lower half (12) of the perforated scrap steel bale block; The bottom of the upper half (11) of the scrap steel packing block with holes and the top of the lower half (12) of the scrap steel packing block with holes are both provided with semicircular grooves (131), and the positions of the semicircular grooves (131) at the bottom of the upper half (11) of the scrap steel packing block with holes and the semicircular grooves (131) at the top of the lower half (12) of the scrap steel packing block with holes correspond to each other and can be combined into a through hole (13); The bottom of the upper half (11) of the perforated scrap steel packing block and the top of the lower half (12) of the perforated scrap steel packing block are both provided with closed cavity grooves, and the closed cavity grooves at the bottom of the upper half (11) of the perforated scrap steel packing block and the closed cavity grooves at the top of the lower half (12) of the perforated scrap steel packing block correspond to each other in position and can be combined into a closed cavity; The left and right sides of the bottom of the upper half (11) of the scrap steel packing block with holes are respectively provided with a mounting groove A (111) and a mounting block A (112); the left and right sides of the top of the lower half (12) of the scrap steel packing block with holes are respectively provided with a mounting block B (121) and a mounting groove B (122); the mounting groove A (111) and the mounting block A (112) can be respectively matched and connected with the mounting block B (121) and the mounting groove B (122).

8. A manufacturing mold for a labyrinth-type scrap steel packaging block structure according to claim 7, characterized in that: The bottom of the mold (2) is provided with a mounting block pressing groove (21), a through hole pressing block (23), a closed cavity pressing block, a mounting groove pressing block (22) and a labyrinth structure pressing module (26); The mounting block pressing groove (21) is used to press the mounting groove A (111) and the mounting groove B (122); The through-hole pressing block (23) is used to press the semicircular groove (131); The closed cavity pressing block is used to press the closed cavity groove; The labyrinth structure pressing module (26) is used to press the labyrinth structure (3).

9. The manufacturing mold of a labyrinth type scrap steel packaging block structure according to claim 8, characterized in that: The labyrinth structure pressing module (26) is provided with a flow limiting section pressing block (27) for pressing the flow limiting section (4).

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