Gas-liquid separation assembly of hydrogen sulfide treatment equipment

Abstract

The invention relates to the technical field of gas-liquid separation, in particular to a gas-liquid separation assembly of hydrogen sulfide treatment equipment, two mounting column boxes are fixedly connected to the top of a fixed bottom plate, extrusion half bins are fixedly connected to the adjacent sides of the two mounting column boxes, and fixed inner columns are rotatably connected to the inner sides of the two extrusion half bins; two extrusion rotating rings are rotatably connected to the outer side of the fixed inner column, the two ends of the fixed inner column are fixedly connected to the interior of the mounting column box, a fixed base is fixedly connected to the outer side of the fixed inner column, and rotating bases are fixedly connected to the outer sides of the extrusion rotating rings; inserting bottom blocks are fixedly connected to the tops of the fixed base and the rotating base, rotating outer rings are fixedly connected to the outer sides of the extrusion half bins, and rotating inner rings are rotatably connected to the inner sides of the two rotating outer rings, so that the filtering membrane body can be quickly replaced, the maintenance cost is reduced, and meanwhile, the filtering efficiency is improved. According to the gas-liquid separation assembly, pollution to the environment can be effectively reduced in the separation process, and the safety of operators is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of gas-liquid separation, in particular to a gas-liquid separation component of hydrogen sulfide processing equipment. Background Art

[0002] Hydrogen sulfide gas-liquid separation is a common process in chemical production, mainly used to separate hydrogen sulfide gas from gas mixtures. Hydrogen sulfide is a toxic gas with a rotten egg smell, which is widely present in industrial processes such as natural gas, petroleum refining, and coal chemical industry.

[0003] In the prior art, many hydrogen sulfide gas-liquid separation processes use membrane filtration technology. However, since hydrogen sulfide is corrosive, the membrane components are easily damaged and therefore require frequent replacement and maintenance, thereby increasing maintenance costs. To this end, the present invention provides a gas-liquid separation component for hydrogen sulfide processing equipment. Summary of the invention

[0004] The object of the present invention is to provide a gas-liquid separation component for hydrogen sulfide processing equipment to solve the problems raised in the above background technology.

[0005] The technical solution of the present invention is: a gas-liquid separation component of hydrogen sulfide processing equipment, comprising a fixed bottom plate, the top of the fixed bottom plate is fixedly connected to two mounting column boxes, the adjacent sides of the two mounting column boxes are fixedly connected to extrusion half bins, the inner sides of the two extrusion half bins are rotatably connected to fixed inner columns, the outer sides of the fixed inner columns are rotatably connected to two extrusion rotating rings, the two ends of the fixed inner columns are fixedly connected to the inside of the mounting column boxes, the outer sides of the fixed inner columns are fixedly connected to a fixed base, the outer sides of the extrusion rotating rings are fixedly connected to a rotating base, the fixed base and the rotating ring are fixedly connected to each other. The top of the base is fixedly connected with a plug-in bottom block, the outer side of the extrusion half bin is fixedly connected with a rotating outer ring, the inner sides of the two rotating outer rings are rotatably connected with a rotating inner ring, the outer side of the fixed base is movably connected with a fixed filter frame, the outer side of the rotating base is movably connected with an extrusion filter frame, the inner sides of the fixed filter frame and the extrusion filter frame are fixedly connected with a filter membrane body, the inner walls of one end of the two rotating outer rings are fixedly connected with a fixed total block, the inner walls of the other end of the two rotating outer rings are fixedly connected with a fixed sub-block, and the two fixed sub-blocks are fixedly connected to the fixed total block. A guide ring, wherein the guide ring is located on the inner side of the rotating outer ring, a guide rotating plate is movably sleeved on the outer side of the guide ring, a push head is fixedly connected to one end of the guide rotating plate, and the push head is movably clamped on the inner sides of the two fixed blocks, an extrusion block is movably sleeved on the outer side of the guide ring, and the top and bottom of the extrusion block are fixedly connected to two extrusion springs, and the extrusion springs are movably sleeved on the outer side of the guide ring, and a worm gear row is fixedly connected to the outer side of the guide rotating plate, and an extrusion motor is connected to the top height of the fixed bottom plate, and the output end of the extrusion motor is fixedly connected to A rotating worm is connected, and the rotating worm is meshed with the worm gear row. The outer sides of the two rotating outer rings are fixedly connected with protective outer rings, and the outer sides of the protective outer rings are fixedly connected with protective outer cylinders, and the protective outer cylinders are sleeved on the outer sides of the rotating worms. One side of one of the extrusion half-bins is fixedly connected with a liquid inlet and a liquid discharge port, and one side of the other extrusion half-bin is fixedly connected with an exhaust port. The inner side of the rotating inner ring is fixedly connected with two inner connecting plates, and both ends of the inner connecting plates are fixedly connected with protective inner plates, and the protective inner plates are rotatably connected to the inside of the extrusion half-bin.When in use: the exhaust port is located on one side of the protective inner plate, and the liquid inlet is located on the side where the protective inner plate is not provided. The separated liquid enters the interior through the liquid inlet, and then the extrusion motor starts, driving the rotating worm to rotate, driving the worm gear row to rotate downward, driving the guide rotating plate and the push head to rotate along the guide ring, and limiting the position through the extrusion spring, driving the rotating inner ring to rotate, and driving the extrusion filter frame to rotate through the blocking ring block, while driving the inner connecting plate and the protective inner plate to rotate. When the extrusion filter frame rotates through the exhaust port, the protective inner plate opens the exhaust port, so that a gap is formed between the extrusion filter frame and the fixed filter frame, so that the gap is connected to the exhaust port, and at the same time, the extrusion filter frame squeezes the liquid to one side, so that the filter membrane body filters and separates the gas, and the gas flows out through the filter membrane body, and then the gas is discharged through the exhaust port. After the extrusion is completed, it is reset to discharge the filtered liquid through the liquid discharge port. ;

[0006] Preferably, the top of the fixed filter frame is fixedly connected with a plug-in box, the inner side of the plug-in box is movably connected with a blocking ring block, the blocking ring block is slidably connected to the inner side of the rotating inner ring, the blocking ring block is fixedly connected to the top of the extrusion filter frame, the top of the protective outer ring is rotatably connected with a fixed pressure shaft, the top of the fixed pressure shaft is fixedly connected with a fixed pressure block, the bottom of the plug-in box is slidably connected with two retractable plug-in blocks, a sliding groove is provided on one side of the plug-in box, a retractable slider is fixedly connected to one side of the retractable plug-in block, the retractable slider is slidably connected to the inner side of the sliding groove, the inner side of the plug-in box is fixedly connected with a retractable shaft, the retractable shaft is slidably connected to the inside of the retractable plug-in block, the outer side of the retractable shaft is movably sleeved with a retractable spring, the top of the protective outer ring is fixed Two retractable bases are connected, and the retractable bases are located at the bottom of the retractable slider; when in use: the filter membrane body is installed on the inner side of the fixed filter frame and the extrusion filter frame, so that the plug-in box is connected to the top of the fixed filter frame. When installing, the fixed filter frame and the extrusion filter frame are clamped on the top of the plug-in bottom block. At the same time, when the plug-in box slides down, the retractable base pushes the retractable slider upward to make the retractable plug-in block detach from the top of the extrusion filter frame, so that the extrusion filter frame is loosened, and the fixed pressing shaft is rotated at the same time to make the fixed pressing block cover the top of the plug-in box for fixing. When it is to be replaced, the above steps are performed in reverse, and the plug-in box is pulled out. At the same time, the retractable spring will push the retractable plug-in block to be clamped on the top of the extrusion filter frame, and then the extrusion filter frame is hooked by the sealing ring block to bring out the fixed filter frame, so that it can be quickly repaired and replaced.

[0007] The present invention provides a gas-liquid separation component of a hydrogen sulfide treatment device through improvement, which has the following improvements and advantages compared with the prior art:

[0008] First, in the gas-liquid separation component of hydrogen sulfide treatment equipment described in the present invention, the exhaust port is located on one side of the protective inner plate, and the liquid inlet is located on the side where the protective inner plate is not provided. The separated liquid enters the interior through the liquid inlet, and then the extrusion motor is started, driving the rotating worm to rotate, driving the worm gear row to rotate downward, driving the guide rotating plate and the push head to rotate along the guide ring, and limiting the position through the extrusion spring, driving the rotating inner ring to rotate, and driving the extrusion filter frame to rotate through the blocking ring block, while driving the inner connecting plate and the protective inner plate to rotate. When the extrusion filter frame rotates past the exhaust port, the protective inner plate opens the exhaust port, so that a gap is formed between the extrusion filter frame and the fixed filter frame, so that the gap is connected to the exhaust port, and at the same time, the extrusion filter frame squeezes the liquid to one side, so that the filter membrane body filters and separates the gas, so that the gas flows out through the filter membrane body, and then the gas is discharged through the exhaust port. After the extrusion is completed, it is reset to discharge the filtered liquid through the liquid discharge port.

[0009] Second: The gas-liquid separation component of the hydrogen sulfide treatment equipment described in the present invention is achieved by installing the filter membrane body on the inner side of the fixed filter frame and the extrusion filter frame, so that the plug-in box is connected to the top of the fixed filter frame. During installation, the fixed filter frame and the extrusion filter frame are clamped on the top of the plug-in bottom block. At the same time, when the plug-in box slides down, the retractable base pushes the retractable slider upward to make the retractable plug-in block detach from the top of the extrusion filter frame and release the extrusion filter frame. At the same time, the fixed pressing shaft is rotated to make the fixed pressing block cover the top of the plug-in box for fixing. When it is to be replaced, the above steps are performed in reverse, and the plug-in box is pulled out. At the same time, the retractable spring will push the retractable plug-in block to clamp on the top of the extrusion filter frame. Then, the fixed filter frame is hooked by the sealing ring block to bring the extrusion filter frame out, so that it can be quickly repaired and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0012] Figure 2 It is a schematic diagram of the fixed bottom plate structure of the present invention;

[0013] Figure 3 It is a schematic diagram of the extrusion half-bin structure of the present invention;

[0014] Figure 4 It is a schematic diagram of the fixed inner column structure of the present invention;

[0015] Figure 5 It is a schematic diagram of the structure of the protective inner plate of the present invention;

[0016] Figure 6 It is a schematic diagram of the protective outer ring structure of the present invention;

[0017] Figure 7It is a schematic diagram of the structure of the rotating outer ring of the present invention;

[0018] Figure 8 It is a schematic diagram of the rotating inner ring structure of the present invention;

[0019] Fig. 9 It is a schematic diagram of the worm gear structure of the present invention;

[0020] Fig.10 It is a schematic diagram of the structure of the extrusion filter frame of the present invention;

[0021] Fig.11 It is a schematic diagram of the structure of the plug-in box of the present invention;

[0022] Fig.12 It is a cross-sectional schematic diagram of the separation component of the present invention.

[0023] Description of reference numerals:

[0024] 1. Fix the bottom plate; 2. Install the column box; 3. Fix the inner column; 4. Extrusion half chamber; 5. Liquid inlet; 6. Liquid outlet; 7. Extrusion motor; 8. Protective outer ring; 9. Extrusion swivel; 10. Rotating base; 11. Fixing base; 12. Plug bottom block; 13. Exhaust port; 14. Inner connecting plate; 15. Protective inner plate; 16. Rotating outer ring; 17. Rotating inner ring; 18. Rotating worm; 19. Guide ring; 20. Extrusion block; 21 , extrusion spring; 22, fixed total block; 23, fixed sub-block; 24, guide rotating plate; 25, pushing head; 26, worm gear row; 27, protective outer cylinder; 28, retractable base; 29, plug-in box; 30, fixed pressure shaft; 31, fixed pressure block; 32, fixed filter frame; 33, extrusion filter frame; 34, filter membrane body; 35, sealing ring block; 36, retractable plug-in block; 37, retractable slider; 38, retractable shaft; 39, retractable spring. DETAILED DESCRIPTION

[0025] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a gas-liquid separation component of a hydrogen sulfide treatment device through improvement. The technical solution of the present invention is:

[0027] like Figure 1-Figure 12As shown, a gas-liquid separation component of hydrogen sulfide processing equipment includes a fixed bottom plate 1, two mounting column boxes 2 are fixedly connected to the top of the fixed bottom plate 1, and the adjacent sides of the two mounting column boxes 2 are fixedly connected to an extrusion half-bin 4, the inner sides of the two extrusion half-bins 4 are rotatably connected to a fixed inner column 3, and the outer sides of the fixed inner column 3 are rotatably connected to two extrusion swivels 9, both ends of the fixed inner column 3 are fixedly connected to the inside of the mounting column box 2, the outer side of the fixed inner column 3 is fixedly connected to a fixed base 11, the outer side of the extrusion swivel 9 is fixedly connected to a rotating base 10, and the tops of the fixed base 11 and the rotating base 10 are fixedly connected to plug-in connectors. The bottom block 12 and the outer side of the extrusion half bin 4 are fixedly connected with a rotating outer ring 16, the inner side of the two rotating outer rings 16 is rotatably connected with a rotating inner ring 17, the outer side of the fixed base 11 is movably connected with a fixed filter frame 32, the outer side of the rotating base 10 is movably connected with an extrusion filter frame 33, the inner sides of the fixed filter frame 32 and the extrusion filter frame 33 are fixedly connected with a filter membrane body 34, the inner wall of one end of the two rotating outer rings 16 is fixedly connected with a fixed total block 22, the inner wall of the other end of the two rotating outer rings 16 is fixedly connected with a fixed sub-block 23, and a guide ring is fixedly connected between the two fixed sub-blocks 23 and the fixed total block 22 19, the guide ring 19 is located on the inner side of the rotating outer ring 16, the outer side of the guide ring 19 is movably sleeved with a guide rotating plate 24, one end of the guide rotating plate 24 is fixedly connected with a push head 25, the push head 25 is movably connected to the inner side of the two fixed blocks 23, the outer side of the guide ring 19 is movably sleeved with an extrusion block 20, the top and bottom of the extrusion block 20 are fixedly connected with two extrusion springs 21, the extrusion spring 21 is movably sleeved on the outer side of the guide ring 19, the outer side of the guide rotating plate 24 is fixedly connected with a worm gear row 26, the top height of the fixed bottom plate 1 is connected with an extrusion motor 7, and the output end of the extrusion motor 7 is fixedly connected There is a rotating worm 18, which is meshed with a worm gear row 26. The outer sides of the two rotating outer rings 16 are fixedly connected with protective outer rings 8, and the outer sides of the protective outer rings 8 are fixedly connected with protective outer cylinders 27. The protective outer cylinders 27 are sleeved on the outer sides of the rotating worm 18. One side of an extrusion half-chamber 4 is fixedly connected with a liquid inlet 5 and a liquid discharge port 6, and one side of the other extrusion half-chamber 4 is fixedly connected with an exhaust port 13. The inner side of the rotating inner ring 17 is fixedly connected with two inner connecting plates 14, and both ends of the inner connecting plates 14 are fixedly connected with protective inner plates 15, which are rotatably connected to the inside of the extrusion half-chamber 4.During use: the exhaust port 13 is located on one side of the protective inner plate 15, and the liquid inlet 5 is located on the side where the protective inner plate 15 is not provided. The separated liquid enters the interior through the liquid inlet 5, and then the extrusion motor 7 is started, driving the rotating worm 18 to rotate, driving the worm gear row 26 to rotate downward, driving the guide rotating plate 24 and the pushing head 25 to rotate along the guide ring 19, and limiting the position through the extrusion spring 21, driving the rotating inner ring 17 to rotate, and pushing the extrusion filter frame 33 to rotate through the blocking ring block 35, while driving the inner connecting plate 14 and the protective inner plate 15 to rotate. When the extrusion filter frame 33 rotates past the exhaust port 13, the protective inner plate 15 opens the exhaust port 13, so that a gap is formed between the extrusion filter frame 33 and the fixed filter frame 32, so that the gap is connected to the exhaust port 13, and at the same time, the extrusion filter frame 33 squeezes the liquid to one side, so that the filter membrane body 34 filters and separates the gas, so that the gas flows out through the filter membrane body 34, and then the gas is discharged through the exhaust port 13. After the extrusion is completed, it is reset to discharge the filtered liquid through the liquid discharge port 6. ;

[0028] The top of the filter frame 32 is fixedly connected with a plug-in box 29, and a sealing ring block 35 is movably connected to the inner side of the plug-in box 29. The sealing ring block 35 is slidably connected to the inner side of the rotating inner ring 17, and the sealing ring block 35 is fixedly connected to the top of the extruded filter frame 33. The top of the protective outer ring 8 is rotatably connected with a fixed pressure shaft 30, and the top of the fixed pressure shaft 30 is fixedly connected with a fixed pressure block 31. The bottom of the plug-in box 29 is slidably connected with two retractable plug-in blocks 36. A sliding groove is provided on one side of the plug-in box 29, and a retractable slider 37 is fixedly connected to one side of the retractable plug-in block 36. The retractable slider 37 is slidably connected to the inner side of the sliding groove. A retractable shaft 38 is fixedly connected to the inner side of the plug-in box 29, and the retractable shaft 38 is slidably connected to the inside of the retractable plug-in block 36. A retractable spring 39 is movably sleeved on the outer side of the retractable shaft 38. The top of the protective outer ring 8 is fixedly connected with two retractable bases 28. The seat 28 is located at the bottom of the retractable slider 37; when in use: the filter membrane body 34 is installed on the inner side of the fixed filter frame 32 and the extrusion filter frame 33, so that the plug-in box 29 is connected to the top of the fixed filter frame 32. During installation, the fixed filter frame 32 and the extrusion filter frame 33 are snapped onto the top of the plug-in bottom block 12. At the same time, when the plug-in box 29 slides down, the retractable base 28 pushes the retractable slider 37 upward, so that the retractable plug block 36 is separated from the top of the extrusion filter frame 33, so that the extrusion filter frame 33 is loosened, and the fixed pressing shaft 30 is rotated at the same time, so that the fixed pressing block 31 covers the top of the plug-in box 29 for fixing. When it is to be replaced, the above steps are performed in reverse, the plug-in box 29 is pulled out, and the retractable spring 39 will push the retractable plug block 36 to be snapped onto the top of the extrusion filter frame 33, and then the extrusion filter frame 33 is taken out by hooking the fixed filter frame 32 through the blocking ring block 35, so that it can be quickly repaired and replaced.

[0029] Working principle: When in use: the exhaust port 13 is located on one side of the protective inner plate 15, and the liquid inlet 5 is located on the side where the protective inner plate 15 is not provided. The separated liquid enters the interior through the liquid inlet 5, and then the extrusion motor 7 is started, driving the rotating worm 18 to rotate, driving the worm gear row 26 to rotate downward, driving the guide rotating plate 24 and the pushing head 25 to rotate along the guide ring 19, and limiting the position through the extrusion spring 21, driving the rotating inner ring 17 to rotate, and pushing the extrusion filter frame 33 to rotate through the blocking ring block 35, and at the same time driving the inner connecting plate 14 and the protective inner plate 15 to rotate. When the extrusion filter frame 33 rotates past the exhaust port 13, the protective inner plate 15 opens the exhaust port 13, so that a gap is formed between the extrusion filter frame 33 and the fixed filter frame 32, so that the gap is connected to the exhaust port 13, and at the same time, the extrusion filter frame 33 squeezes the liquid to one side, so that the filter membrane body 34 filters and separates the gas, so that the gas flows out through the filter membrane body 34, and then the gas passes The filter element 32 is then pushed out of the filter housing 32 and the filter element 33 is then released, and the filter element 32 is then released from the filter housing 32 and the filter element 33 is then released.

[0030] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-liquid separation assembly for hydrogen sulfide processing equipment, comprising a fixed bottom plate (1), characterized in that: The top of the fixed bottom plate (1) is fixedly connected to two mounting column boxes (2), and adjacent sides of the two mounting column boxes (2) are fixedly connected to extrusion half bins (4). The inner sides of the two extrusion half bins (4) are rotatably connected to fixed inner columns (3), and the outer sides of the fixed inner columns (3) are rotatably connected to two extrusion rotating rings (9). Both ends of the fixed inner columns (3) are fixedly connected to the inside of the mounting column boxes (2), and the outer sides of the fixed inner columns (3) are fixedly connected to a fixed base (11), and the outer sides of the extrusion rotating rings (9) are fixedly connected to a rotating base (10). The tops of the fixed base (11) and the rotating base (10) are both fixedly connected with a plug-in bottom block (12); the outer sides of the extrusion half bins (4) are both fixedly connected with a rotating outer ring (16); the inner sides of the two rotating outer rings (16) are rotatably connected with a rotating inner ring (17); the outer side of the fixed base (11) is movably connected with a fixed filter frame (32); the outer side of the rotating base (10) is movably connected with an extrusion filter frame (33); the inner sides of the fixed filter frame (32) and the extrusion filter frame (33) are both fixedly connected with a filter membrane body (34); A fixed main block (22) is fixedly connected to the inner wall of one end of the two rotating outer rings (16), a fixed sub-block (23) is fixedly connected to the inner wall of the other end of the two rotating outer rings (16), a guide ring (19) is fixedly connected between the two fixed sub-blocks (23) and the fixed main block (22), the guide ring (19) is located on the inner side of the rotating outer ring (16), a guide rotating plate (24) is movably sleeved on the outer side of the guide ring (19), a push head (25) is fixedly connected to one end of the guide rotating plate (24), and the push head (25) is movably clamped on the inner side of the two fixed sub-blocks (23); The outer side of the guide ring (19) is movably sleeved with an extrusion block (20), the top and bottom of the extrusion block (20) are fixedly connected with two extrusion springs (21), the extrusion springs (21) are movably sleeved on the outer side of the guide ring (19), and the outer side of the guide rotating plate (24) is fixedly connected with a worm gear row (26); The top of the fixed bottom plate (1) is connected to an extrusion motor (7), the output end of the extrusion motor (7) is fixedly connected to a rotating worm (18), the rotating worm (18) is meshed with a worm gear row (26), the outer sides of the two rotating outer rings (16) are fixedly connected to protective outer rings (8), the outer sides of the protective outer rings (8) are fixedly connected to protective outer cylinders (27), and the protective outer cylinders (27) are sleeved on the outer sides of the rotating worm (18); One side of one of the extrusion half bins (4) is fixedly connected to a liquid inlet (5) and a liquid outlet (6), and one side of the other extrusion half bin (4) is fixedly connected to an exhaust port (13). The inner side of the rotating inner ring (17) is fixedly connected to two inner connecting plates (14), and both ends of the inner connecting plates (14) are fixedly connected to protective inner plates (15), and the protective inner plates (15) are rotatably connected to the interior of the extrusion half bin (4).

2. A gas-liquid separation component for hydrogen sulfide treatment equipment according to claim 1, characterized in that: The top of the fixed filter frame (32) is fixedly connected to a plug-in box (29), the inner side of the plug-in box (29) is movably engaged with a blocking ring block (35), the blocking ring block (35) is slidably engaged with the inner side of the rotating inner ring (17), the blocking ring block (35) is fixedly connected to the top of the extrusion filter frame (33), the top of the protective outer ring (8) is rotatably connected to a fixed pressure shaft (30), and the top of the fixed pressure shaft (30) is fixedly connected to a fixed pressure block (31).

3. A gas-liquid separation component for hydrogen sulfide treatment equipment according to claim 2, characterized in that: The bottom of the plug-in box (29) is slidably connected to two retractable plug-in blocks (36), a sliding groove is provided on one side of the plug-in box (29), a retractable slider (37) is fixedly connected to one side of the retractable plug-in block (36), the retractable slider (37) is slidably connected to the inner side of the sliding groove, the inner side of the plug-in box (29) is fixedly connected to a retractable shaft (38), the retractable shaft (38) is slidably connected to the inside of the retractable plug-in block (36), the outer side of the retractable shaft (38) is movably sleeved with a retractable spring (39), the top of the protective outer ring (8) is fixedly connected to two retractable bases (28), and the retractable bases (28) are located at the bottom of the retractable slider (37).

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