Polycrystalline silicon material water quenching crusher

Abstract

The invention discloses a polycrystalline silicon material water quenching crusher, and particularly relates to the technical field of crushing, the polycrystalline silicon material water quenching crusher comprises a control table, the right side of the control table is fixedly connected with a connecting assembly, the bottom of the connecting assembly is fixedly connected with a first separation assembly, and the right part of the upper side of the connecting assembly is fixedly connected with a conveying assembly; a crushing assembly is fixedly connected to the upper end of the connecting assembly, and an extrusion assembly is fixedly connected to the upper end of the crushing assembly. According to the water quenching crusher for the polycrystalline silicon material, the crushing assembly and the extrusion assembly are arranged to be matched, secondary rolling is conducted on polycrystalline silicon, the particle size distribution of polycrystalline silicon particles can be further made to be more uniform, and therefore the subsequent melting and crystallization processes are facilitated; furthermore, a conveying assembly is arranged to be matched with water in a first separation assembly, so that heat generated in the rolling or extruding process can be effectively taken away, the situation that the temperature of a rolling wheel is too high due to overheating is avoided, and material deformation, adhesion or burning loss caused by high temperature is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of crushing, and in particular to a polysilicon material water quenching crusher. Background Art

[0002] Polysilicon material is one of the key raw materials in the solar photovoltaic industry. Every step in its production process directly affects the quality and production efficiency of the final product. The traditional polysilicon crushing process usually relies on a single compression or rolling. However, with the improvement of silicon material quality requirements, a single rolling is often difficult to meet the requirements of precise particle size and uniformity. Secondary rolling, as an optimization method, can further refine and homogenize silicon material particles, improve their performance in subsequent melting and crystallization processes, and thus improve the performance of silicon wafers and the efficiency of solar cells.

[0003] Chinese patent announcement number CN216172988U discloses a polysilicon water quenching crusher, including a feeding system, a heating system, a water cooling system, a transmission system and a crushing system connected in sequence; the feeding system and the heating system are both installed on a platform, and the feeding system includes a feeding manipulator for transporting materials to the heating system; the heating system includes a heating furnace for heating the materials transported by the feeding system; the water cooling system includes a water tank for water cooling the heated materials; the transmission system includes a horizontal conveyor line and an inclined conveyor line connected in sequence, the feeding end of the horizontal conveyor line is connected to the discharge end of the water cooling system, and the top discharge end of the inclined conveyor line is connected to the crushing system. The above patent document performs water quenching on silicon rods, and the silicon rods are subjected to a high temperature of more than 500 degrees. The silicon rods are cracked by the principle of rapid high temperature and low temperature, thereby reducing the dust and particles generated by physical blows or hammering of the silicon rods, thereby reducing losses and reducing the crushing loss rate of the silicon rods. However, the above patent still has the following defects during implementation:

[0004] In the implementation process of the above patent document, the crushing is carried out by water quenching, which mainly relies on the effect of the sharp temperature difference between high temperature and water cooling. Although the silicon rod can be cracked by thermal expansion and cooling, this crushing method may cause cracks and the crushing effect is not uniform, especially when the heat treatment process of the material is not well controlled, irregular crushing is prone to occur. Summary of the invention

[0005] The main purpose of the present invention is to provide a polysilicon water quenching crusher, which can effectively solve the problem of being unable to more accurately control the uniformity and particle size distribution of polysilicon materials and ensure higher crushing quality.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A polysilicon water quenching crusher comprises a control console, a connecting component is fixedly connected to the right side of the control console, a separation component is fixedly connected to the bottom of the connecting component, a conveying component is fixedly connected to the upper right part of the connecting component, a crushing component is fixedly connected to the upper end of the connecting component, and an extrusion component is fixedly connected to the upper end of the crushing component.

[0008] Preferably, the connecting assembly includes four supporting columns, the upper ends of the four supporting columns are fixedly connected to the bottom end of the crushing assembly, the middle parts of the two supporting columns on the right side that are close to each other are fixedly connected with connecting rods, the sides of the two connecting rods that are close to each other are commonly fixedly connected with a connecting box, and the inner cavity of the connecting box is fixedly connected with an inclined filter plate.

[0009] Preferably, the extrusion assembly includes a shell two, an extrusion block one is fixedly connected to the right part of the inner cavity of the shell two, a baffle is fixedly connected to the upper left part of the inner cavity of the shell two, an extrusion block two is rotatably connected to the left side of the inner cavity of the shell two, a matching rod is rotatably connected to the lower left part of the inner cavity of the shell two, an eccentric wheel is fixedly connected to the outer surface of the matching rod, and a transmission wheel is fixedly connected to the rear part of the matching rod.

[0010] Preferably, the conveying component includes an input pipe, the bottom end of the input pipe is fixedly connected to the left side of the upper end of the separation component, the other end of the input pipe is fixedly connected to a water pump, the output end of the water pump is fixedly connected to an output pipe, the other end of the output pipe is fixedly connected to a convergence box, the upper end of the convergence box is fixedly connected to three drain pipes, and the three drain pipes are all connected to the right side of the second inner cavity of the outer shell.

[0011] Preferably, the crushing assembly includes a bottom shell, a fixing ring is fixedly connected to the upper end of the bottom shell, a motor is fixedly connected to the upper left part of the fixing ring, an outer shell 1 is fixedly connected to the upper end of the fixing ring, a transmission is rotatably connected to the left side of the inner cavity of the outer shell 1, a belt is wound around the outer surface of the motor and the outer surface of the transmission, a matching assembly is rotatably connected to the right side of the outer shell 1, and a tilting table is fixedly connected to the inner cavity of the outer shell 1.

[0012] Preferably, the mating component includes a support platform, the inner cavity of the support platform is rotatably connected to the transmission, gear one is fixedly connected to the upper front part of the fixed ring, gear two is meshed on the right side of gear one, a transmission rod is fixedly connected to the inner cavity of gear two, a transmission belt is wound around the front surface of the transmission and the front part of gear one, and a rolling wheel is fixedly connected to the middle part of the outer surface of the transmission and the middle part of the outer surface of the transmission rod.

[0013] Preferably, the separation component 1 includes a separation box, a fixed plate is fixedly connected to the right side of the upper end of the separation box, a hinge is fixedly connected to the left side of the upper end of the fixed plate, a rotating door is fixedly connected to the left side of the hinge, a matching hole is fixedly connected to the right side of the inner cavity of the separation box, two sliding grooves are provided on the left parts of the front and rear sides of the inner cavity of the separation box, two movable hooks are fixedly connected to the bottom of the front and rear sides of the rotating door, and separation component 2 is movably connected to the bottom of the two movable hooks.

[0014] Preferably, the second separation component comprises a sliding box, a plurality of filter holes are arranged at the bottom of the inner cavity of the sliding box, handles are fixedly connected to the upper parts of the front and rear sides of the inner cavity of the sliding box, and two sliding bars are fixedly connected to the front and rear sides of the sliding box.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up a crushing component and an extrusion component to cooperate, and by performing secondary rolling on the polysilicon, the particle size distribution of the polysilicon particles can be further made more uniform, which is helpful for the subsequent melting and crystallization process. Further, by setting up a conveying component to cooperate with the water inside the separation component, the heat generated during the rolling or extrusion process can be effectively taken away, avoiding overheating that causes the rolling wheel temperature to be too high, and reducing material deformation, adhesion or burning caused by high temperature.

[0017] 2. By arranging a filter plate in the inner cavity of the connection box, when the extrusion block 1 intermittently extracts the inside of the connection box through the outer shell 2, a certain power can be given to the rolled polysilicon material to avoid stagnation or retention of the material in the box, so that the polysilicon material can eventually fall into the separation component 1. When the extrusion block 1 extracts water from the inner cavity of the connection box, the extrusion block 1 can also be cooled through the drain pipe to avoid high temperature accumulation in the extrusion block 1 and shorten the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is another perspective overall structural schematic diagram of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall structure of the connection assembly of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall structure of the conveying assembly of the present invention;

[0022] Figure 5 It is a partial structural schematic diagram of the crushing component of the present invention;

[0023] Figure 6 For the present invention Figure 2 A schematic diagram of the structure enlargement at point A;

[0024] Figure 7 It is a partial structural schematic diagram of the crushing component of the present invention;

[0025] Figure 8 It is a schematic diagram of the overall structure of a separation component of the present invention;

[0026] Fig. 9 It is a sectional view of the overall structure of the separation component of the present invention;

[0027] Fig.10 It is a schematic diagram of the overall structure of the separation component 2 of the present invention.

[0028] In the figure: 1, control console; 2, connecting assembly; 21, support column; 22, connecting rod; 23, connecting box; 24, filter plate; 3, separation assembly 1; 31, separation box; 32, fixing plate; 33, matching hole; 34, hinge; 35, rotating door; 36, sliding slot; 37, movable hook; 38, separation assembly 2; 381, sliding box; 382, ​​handle; 383, filter hole; 384, sliding bar; 4, crushing assembly; 41, bottom shell; 42, fixing ring; 43, motor; 44, belt; 4 5. Transmission device; 46. Shell 1; 47. Rolling wheel; 48. Matching assembly; 481. Support platform; 482. Transmission belt; 483. Gear 1; 484. Gear 2; 485. Transmission rod; 49. Tilt table; 5. Extrusion assembly; 51. Shell 2; 52. Extrusion block 1; 53. Extrusion block 2; 54. Baffle; 55. Matching rod; 56. Transmission wheel; 57. Eccentric wheel; 6. Conveying assembly; 61. Input pipe; 62. Water pump; 63. Output pipe; 64. Converging box; 65. Drain pipe. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] For example, see Figure 1 and Figure 2 As shown, a polysilicon water quenching crusher includes a control console 1, a connecting component 2 is fixedly connected to the right side of the control console 1, a separation component 3 is fixedly connected to the bottom of the connecting component 2, a conveying component 6 is fixedly connected to the upper right part of the connecting component 2, a crushing component 4 is fixedly connected to the upper end of the connecting component 2, and an extrusion component 5 is fixedly connected to the upper end of the crushing component 4.

[0031] During the implementation of this embodiment, the operator first needs to open the control console 1, and then adjust the internal parameters of the control console 1 to control the specific parameters of the power source inside the crushing component 4 and the conveying source inside the conveying component 6. Then the operator can merge the external feeding device with the present device, so that the feeding device can continuously feed the polysilicon material to be crushed into the extrusion component 5. Because the internal power source of the crushing component 4 will drive the extrusion component 5 to start when it is started, the components inside the extrusion component 5 can perform the first crushing of the polysilicon material to be crushed, so that larger pieces of polysilicon material are broken into small pieces, and then crushed for the second time by the crushing component 4. The crushed polysilicon material will be recovered and filtered along the connecting component 2 fixedly connected to the bottom end of the crushing component 4, and then enter the separation component 3 for collection. The water filtered by the connecting component 2 will be extracted by the conveying component 6, and then discharged into the extrusion component 5, so that the heat generated during the extrusion process can be absorbed and cooled.

[0032] It should be further explained that in the initial state, there is cooling water inside the device, and the height of the cooling water cannot exceed the middle of the crushing component 4, and cannot be lower than the upper right side of the connecting box 23. When the power source inside the conveying component 6 extracts it, it enters the inner cavity of the extrusion component 5 in an intermittent manner;

[0033] Furthermore, the control console 1 mentioned above is a very mature technical means in the prior art. In this solution, only its control function is utilized, and the specific working principle and internal components are not elaborated in detail.

[0034] Further, by setting up a crushing component 4 and an extrusion component 5 for cooperation, the raw materials can be further crushed and screened, and the particle size distribution of the polysilicon particles can be improved to make it more uniform, which is helpful for the subsequent melting and crystallization process. Further, by setting up a conveying component 6 for cooperation with the water inside the separation component 3, the heat generated during the rolling or extrusion process can be effectively taken away, avoiding overheating that causes the rolling wheel temperature to be too high, and reducing material deformation, adhesion or burning caused by high temperature.

[0035] For further information, please refer to Figure 3 , Figure 4 and Figure 5As shown, the connecting assembly 2 includes four supporting columns 21, the upper ends of the four supporting columns 21 are fixedly connected to the bottom end of the crushing assembly 4, the middle parts of the two supporting columns 21 on the right side close to each other are fixedly connected with connecting rods 22, the two connecting rods 22 are fixedly connected to the connecting box 23 on the side close to each other, and the inner cavity of the connecting box 23 is fixedly connected with an inclined filter plate 24, and the extrusion assembly 5 includes a second shell 51, the right part of the inner cavity of the second shell 51 is fixedly connected with an extrusion block 1 52, the upper left part of the inner cavity of the second shell 51 is fixedly connected with a baffle 54, and the left side of the inner cavity of the second shell 51 is rotatably connected with an extrusion block 1 Block 2 53, a matching rod 55 is rotatably connected to the lower left side of the inner cavity of the second shell 51, an eccentric wheel 57 is fixedly connected to the outer surface of the matching rod 55, and a transmission wheel 56 is fixedly connected to the rear of the matching rod 55. The conveying component 6 includes an input pipe 61, the bottom end of the input pipe 61 is fixedly connected to the left side of the upper end of the separation component 3, the other end of the input pipe 61 is fixedly connected to a water pump 62, the output end of the water pump 62 is fixedly connected to an output pipe 63, the other end of the output pipe 63 is fixedly connected to a convergence box 64, and the upper end of the convergence box 64 is fixedly connected to three drain pipes 65, and the three drain pipes 65 are all connected to the right side of the inner cavity of the second shell 51.

[0036] Further, in the present implementation process, when the power source inside the crushing assembly 4 is started, the transmission wheel 56 is driven to rotate by the internal power source and the internal components, and the transmission wheel 56 will drive the matching rod 55 to rotate. When the matching rod 55 rotates, it can drive the eccentric wheel 57 fixed to the outer surface to rotate. Therefore, when the eccentric wheel 57 is eccentrically set during the rotation process, it can drive the extrusion block 2 53 to pressurize the polysilicon material, so that the larger blocks are crushed, and the crushed polysilicon material will be crushed again by the crushing assembly 4. The polysilicon material after secondary crushing will flow along the inner cavity of the crushing component 4, and then follow the cooling water into the inner cavity of the connecting box 23 and then be blocked by the filter plate 24. Because the water pump 62 cools the extrusion block 52 in an intermittent manner, the outer shell 2 51 can intermittently extract the right side of the inner cavity of the extrusion block 52. When the extrusion block 52 stops extracting water from the inner cavity of the connecting box 23, the polysilicon material attached to the surface of the filter plate 24 will fall into the separation component 3 due to gravity, and then wait for the operator to collect it.

[0037] It should be further explained that the extrusion block 52 mentioned above is a very mature technical means in the prior art. In this solution, only its extraction function is utilized, and its working principle and internal components will not be elaborated in detail.

[0038] Furthermore, by providing a filter plate 24 in the inner cavity of the connection box 23, when the extrusion block 52 intermittently extracts the inside of the connection box 23 through the outer shell 2 51, a certain power can be given to the rolled polysilicon material to avoid stagnation or retention of the material in the box, so that the polysilicon material can eventually fall into the separation component 3. When the extrusion block 52 extracts water from the inner cavity of the connection box 23, the extrusion block 52 can also be cooled through the drain pipe 65 to avoid the extrusion block 52 from accumulating due to high temperature and shortening the service life of the equipment.

[0039] For further information, see Figure 5 , Figure 6 and Figure 7 As shown, the crushing assembly 4 includes a bottom shell 41, a fixing ring 42 is fixedly connected to the upper end of the bottom shell 41, a motor 43 is fixedly connected to the upper left part of the fixing ring 42, a shell 1 46 is fixedly connected to the upper end of the fixing ring 42, a transmission device 45 is rotatably connected to the left side of the inner cavity of the shell 1 46, a belt 44 is wound around the outer surface of the motor 43 and the outer surface of the transmission device 45, a matching assembly 48 is rotatably connected to the right side of the shell 1 46, a tilting table 49 is fixedly connected to the inner cavity of the shell 1 46, the matching assembly 48 includes a supporting platform 481, the inner cavity of the supporting platform 481 is rotatably connected to the transmission device 45, a gear 1 483 is fixedly connected to the upper front side of the fixing ring 42, a gear 2 484 is meshed on the right side of the gear 1 483, a transmission rod 485 is fixedly connected to the inner cavity of the gear 2 484, a transmission belt 482 is wound around the front of the outer surface of the transmission device 45 and the front of the gear 1 483, and a rolling wheel 47 is fixedly connected to the middle of the outer surface of the transmission device 45 and the middle of the outer surface of the transmission rod 485.

[0040] By setting the motor 43 so that when it is started, the belt 44 wound around the output end can drive the transmission 45 to rotate, and when the transmission 45 is rotating, the rear part thereof will drive the gear 1 483 to rotate through the transmission belt 482, so that when the gear 1 483 is rotating, it will drive the gear 2 484 to rotate through the meshing between the gears, and when the gear 2 484 is rotating, it will drive the grinding wheel 47 fixedly connected to the outer surface and the grinding wheel 47 fixedly connected to the outer surface of the transmission 45 to grind the polysilicon material for the second time, so that it can be broken into smaller particles.

[0041] For further information, please refer to Figure 8 , Fig. 9 and Fig.10As shown, separation component 1 3 includes a separation box 31, a fixed plate 32 is fixedly connected to the right side of the upper end of the separation box 31, a hinge 34 is fixedly connected to the left side of the upper end of the fixed plate 32, a rotating door 35 is fixedly connected to the left side of the hinge 34, a matching hole 33 is fixedly connected to the right side of the inner cavity of the separation box 31, two sliding grooves 36 are provided on the left parts of the front and rear sides of the inner cavity of the separation box 31, two movable hooks 37 are fixedly connected to the bottom of the front and rear sides of the rotating door 35, and a separation component 2 38 is movably connected to the bottom of the two movable hooks 37, and the separation component 2 38 includes a sliding box 381, a plurality of filter holes 383 are arranged at the bottom of the inner cavity of the sliding box 381, a handle 382 is fixedly connected to the upper parts of the front and rear sides of the inner cavity of the sliding box 381, and two sliding bars 384 are fixedly connected to the front and rear sides of the sliding box 381.

[0042] Furthermore, in the specific implementation process of this embodiment, after the polysilicon material passing through the connection box 23 is blocked by the filter plate 24, it will fall into the inner cavity of the separation box 31. Because the surface of the matching hole 33 is inclined, the polysilicon material will follow the slope of the surface of the fixed plate 32, and then all fall into the inner cavity of the separation component 2 38. Then, when the polysilicon material stored inside is sufficient, the detection device inside it will send a signal to the console 1 to remind the operator to take it. At this time, the operator only needs to open the handle fixedly connected to the left part of the outer surface of the rotating door 35 to open the rotating door 35. When the rotating door 35 is opened, the two movable hooks 37 fixedly connected to the bottom will cooperate with the handle 382, ​​so that the sliding box 381 rises, thereby further cooperating with the plurality of filter holes 383 opened at the bottom, and the moisture in the crushed polysilicon material can be filtered out;

[0043] It should be further explained that the movable connection between the movable hook 37 and the handle 382 means that when the operator wants to collect the polysilicon material, the movable hook 37 can be removed at any time to release the connection between the movable hook 37 and the handle 382;

[0044] Furthermore, the detection device mentioned above is a mature technical means in the prior art, and in this solution it needs to be waterproof. In this solution, only its detection function is utilized, and the specific principle will not be elaborated in detail.

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A polysilicon water quenching crusher, comprising a control console (1), characterized in that: The right side of the console (1) is fixedly connected to a connecting component (2), the bottom of the connecting component (2) is fixedly connected to a separating component (3), the upper right part of the connecting component (2) is fixedly connected to a conveying component (6), the upper end of the connecting component (2) is fixedly connected to a crushing component (4), and the upper end of the crushing component (4) is fixedly connected to an extrusion component (5).

2. The polysilicon water quenching crusher according to claim 1, characterized in that: The connecting assembly (2) comprises four supporting columns (21), the upper ends of the four supporting columns (21) are fixedly connected to the bottom end of the crushing assembly (4), the middle parts of the two supporting columns (21) on the right side close to each other are fixedly connected to connecting rods (22), the two connecting rods (22) on the sides close to each other are fixedly connected to a connecting box (23), and the inner cavity of the connecting box (23) is fixedly connected to a filter plate (24) arranged in an inclined manner.

3. The polysilicon water quenching crusher according to claim 1, characterized in that: The extrusion assembly (5) comprises a second shell (51), wherein the right part of the inner cavity of the second shell (51) is fixedly connected to an extrusion block (52), the upper left part of the inner cavity of the second shell (51) is fixedly connected to a baffle (54), the left part of the inner cavity of the second shell (51) is rotatably connected to an extrusion block (53), the lower left part of the inner cavity of the second shell (51) is rotatably connected to a matching rod (55), the outer surface of the matching rod (55) is fixedly connected to an eccentric wheel (57), and the rear part of the matching rod (55) is fixedly connected to a transmission wheel (56).

4. The polysilicon water quenching crusher according to claim 1, characterized in that: The conveying component (6) comprises an input pipe (61), the bottom end of the input pipe (61) is fixedly connected to the left side of the upper end of the separation component (3), the other end of the input pipe (61) is fixedly connected to a water pump (62), the output end of the water pump (62) is fixedly connected to an output pipe (63), the other end of the output pipe (63) is fixedly connected to a convergence box (64), the upper end of the convergence box (64) is fixedly connected to three drainage pipes (65), and the three drainage pipes (65) are all in communication with the right side of the inner cavity of the second shell (51).

5. The polysilicon water quenching crusher according to claim 2, characterized in that: The crushing assembly (4) comprises a bottom shell (41), the upper end of the bottom shell (41) is fixedly connected to a fixing ring (42), the upper left part of the fixing ring (42) is fixedly connected to a motor (43), the upper end of the fixing ring (42) is fixedly connected to a shell 1 (46), the left side of the inner cavity of the shell 1 (46) is rotatably connected to a transmission device (45), the outer surface of the motor (43) and the outer surface of the transmission device (45) are commonly wound and connected with a belt (44), the right side of the shell 1 (46) is rotatably connected to a matching assembly (48), and the inner cavity of the shell 1 (46) is fixedly connected to a tilting platform (49).

6. The polysilicon water quenching crusher according to claim 5, characterized in that: The mating component (48) includes a support platform (481), the inner cavity of the support platform (481) is rotatably connected to the transmission device (45), the upper front portion of the fixed ring (42) is fixedly connected to a gear 1 (483), the right side of the gear 1 (483) is meshed with a gear 2 (484), the inner cavity of the gear 2 (484) is fixedly connected to a transmission rod (485), the front surface of the outer surface of the transmission device (45) and the front portion of the gear 1 (483) are commonly wound with a transmission belt (482), and the middle portion of the outer surface of the transmission device (45) and the middle portion of the outer surface of the transmission rod (485) are fixedly connected to a rolling wheel (47).

7. The polysilicon water quenching crusher according to claim 4, characterized in that: The separation component one (3) comprises a separation box (31), a fixed plate (32) is fixedly connected to the right side of the upper end of the separation box (31), a hinge (34) is fixedly connected to the left side of the upper end of the fixed plate (32), a rotating door (35) is fixedly connected to the left side of the hinge (34), a matching hole (33) is fixedly connected to the right side of the inner cavity of the separation box (31), two sliding grooves (36) are provided on the left side of the front and rear sides of the inner cavity of the separation box (31), two movable hooks (37) are fixedly connected to the bottom of the front and rear sides of the rotating door (35), and the bottoms of the two movable hooks (37) are movably connected to the separation component two (38).

8. The polysilicon water quenching crusher according to claim 7, characterized in that: The second separation component (38) comprises a sliding box (381), a plurality of filter holes (383) are arranged at the bottom of the inner cavity of the sliding box (381), handles (382) are fixedly connected to the upper parts of the front and rear sides of the inner cavity of the sliding box (381), and two sliding bars (384) are fixedly connected to the front and rear sides of the sliding box (381).

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