Special device for impurity removal and separation of low-chlorine ferrous lactate

Abstract

The utility model belongs to the field of low-chlorine ferrous lactate preparation, and particularly relates to a special impurity removal and separation device for low-chlorine ferrous lactate, which comprises a collection box, a discharge pipe, an inlet pipe, a separation box, a separation opening and a filter plate. The separation box is provided with a drainage slide way and an L-shaped supporting frame, the L-shaped supporting frame is provided with an air cylinder, the air cylinder is provided with a piston rod, the piston rod is provided with a push plate, the separation box is provided with an inverted-L-shaped support, the inverted-L-shaped support is provided with an operation block, the operation block is provided with a rotating cavity and a traction cavity, the rotating cavity is provided with a threaded sleeve rod, and the threaded sleeve rod is provided with a pressing plate. According to the special device for impurity removal and separation of low-chlorine ferrous lactate, through cooperation of the pressing plate and the push plate, the problems that the impurity separation effect of existing water-soluble low-chlorine ferrous lactate is poor, a large amount of water spots still exist on the surfaces of separated impurities, and resources are wasted are solved.

Description

Technical Field

[0001] The utility model relates to the field of preparation of low-chloride ferrous lactate, in particular to a special device for removing impurities and separating low-chloride ferrous lactate. Background Art

[0002] Low-chloride ferrous lactate is an organic substance. It is a greenish-white crystalline powder or crystal with a slightly peculiar smell and a slightly sweet metallic taste. When this substance is exposed to moisture or its aqueous solution is oxidized, it will turn into a yellowish-brown color containing orthoferric salts. Light can promote its oxidation process. Ferrous lactate ions are easily colored when reacting with other food additives. It is almost insoluble in ethanol, but soluble in water to form a greenish transparent liquid that is acidic. Ferrous lactate is a common iron supplement, mainly used to supplement iron for the human body, especially to treat iron deficiency anemia. It can help relieve symptoms such as dizziness, pale complexion, and general weakness caused by anemia. In addition, if the patient has a lot of blood loss or suffers from hookworm disease, ferrous lactate can also be taken for treatment.

[0003] During the preparation process of existing low-chloride ferrous lactate, improper operation or poor environmental control may result in impurities in the product. In particular, if the reaction conditions are not strictly controlled, chloride ions or other metal ions may be introduced, thereby affecting the purity of the product. Therefore, it is necessary to remove impurities and separate the low-chloride ferrous lactate. However, the existing low-chloride ferrous lactate impurity removal and separation dedicated equipment still has the following problems during use:

[0004] The existing low-chloride ferrous lactate is prepared and dissolved in water, and then the water-soluble low-chloride ferrous lactate is subjected to impurity separation. However, the impurity separation effect of the water-soluble low-chloride ferrous lactate is poor, and a large amount of water stains still exist on the surface of the separated impurities, resulting in incomplete impurity removal and separation from the water-soluble low-chloride ferrous lactate, causing a waste of resources. Therefore, it is very necessary to use a special device for impurity removal and separation of low-chloride ferrous lactate in the existing low-chloride ferrous lactate preparation field. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology, the existing water-soluble low-chloride ferrous lactate has poor impurity separation effect, and there are still a lot of water stains on the surface of the separated impurities, resulting in incomplete impurity removal and separation of impurities and water-soluble low-chloride ferrous lactate, causing waste of resources. The utility model proposes a special device for impurity removal and separation of low-chloride ferrous lactate.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a special device for removing impurities and separating low-chlorine ferrous lactate, including a collecting box, a discharge pipe fixedly mounted on the collecting box, an inlet pipe fixedly mounted on the collecting box, a separation box fixedly mounted at one end of the inlet pipe, the separation box being a conical funnel, separation ports being provided on both symmetrical sides of the separation box, the separation ports being connected to the interior of the separation box, a filter plate fixedly mounted on the inner wall of the separation box, a drainage slide fixedly mounted on the side of the separation box, the drainage slide being located below the separation port, and an L fixedly mounted on the other side of the separation box. The L-shaped support frame is fixedly equipped with a cylinder, and the output end of the cylinder is fixedly equipped with a piston rod, which movably passes through the L-shaped support frame, and one end of the piston rod is fixedly equipped with a push plate, which is movably assembled with the separation port. An inverted L-shaped bracket is fixedly equipped on the separation box, and an operating block is fixedly equipped on the bottom of the inverted L-shaped bracket. A rotating chamber is provided inside the operating block, and a traction chamber is symmetrically provided on the rotating chamber. A threaded sleeve is movably equipped on the rotating chamber, and the threaded sleeve movably passes through the operating block, and a pressure plate is fixedly equipped on the bottom of the threaded sleeve, and the pressure plate is located above the filter plate.

[0007] Preferably, the surface of the filter plate is flush with the bottom surface of the separation port.

[0008] Preferably, a sliding block is symmetrically fixedly assembled on the upper surface of the threaded sleeve, and the sliding block is movably assembled with the traction cavity. A transmission screw is movably assembled on the rotating cavity, and the transmission screw is threadedly assembled with the threaded sleeve. One end of the transmission screw movably passes through the operating block and the inverted L-shaped bracket, and a traction gear is fixedly assembled on the top of the transmission screw.

[0009] Preferably, a fixing rod is fixedly assembled on the piston rod, a vertical rod is fixedly assembled on one end of the fixing rod, a traction rack is fixedly assembled on the top of the vertical rod, and the traction rack and the traction gear are toothed.

[0010] Preferably, the separation box is fixedly equipped with a drainage tube, one end of the drainage tube is fixedly equipped with an output tube, the top of the drainage tube is fixedly equipped with a conveying cylinder, the interior of the conveying cylinder is connected with the interior of the separation box through the output tube and the interior of the drainage tube, and the drainage tube is located above the filter plate at the internal connection point of the separation box, the conveying cylinder is fixedly equipped with a connecting pipe, the top of the connecting pipe is fixedly equipped with a mixing cylinder, the connecting pipe is fixedly equipped with a solenoid valve, the conveying cylinder is movably equipped with a conveying rod, one end of the conveying rod is fixedly equipped with a second sprocket, the conveying rod is fixedly equipped with a threaded conveying blade, the threaded conveying blade is located inside the conveying cylinder, and a connecting hole is provided at the bottom of the conveying cylinder, the connecting hole is connected with the interior of the conveying cylinder, and the connecting hole on the conveying cylinder is located above the collecting box.

[0011] Preferably, the mixing drum is provided with a feed port, the mixing drum is movably equipped with a rotating rod, the rotating rod is fixedly equipped with a stirring blade, the rotating rod is fixedly equipped with a first miter bevel gear, the mixing drum is fixedly equipped with a mounting frame, the mounting frame is also fixedly equipped with an operating motor, the operating motor movably passes through the mounting frame, and the output end of the operating motor is fixedly assembled with the rotating rod, the mixing drum is fixedly equipped with an assembly block, the assembly block is movably equipped with a movable rod, one end of the movable rod is fixedly equipped with a second miter bevel gear, the second miter bevel gear and the first miter bevel gear are toothed, the other end of the movable rod is fixedly equipped with a first sprocket, and a chain is wound around the first sprocket and the second sprocket.

[0012] The utility model is beneficial in that:

[0013] The low-chloride ferrous lactate dissolved in water of the utility model falls into the second sprocket with impurities, so that the impurities are filtered out, and the cylinder is started, so that the piston rod drives the push plate to move, and the push plate is away from the separation box, and the piston rod drives the vertical rod on the fixed rod to move, and the vertical rod drives the traction rack to move, and the traction rack drives the traction gear to rotate, so that the transmission screw rotates in the threaded sleeve rod, and the sliding block moves on the traction cavity. At this time, the threaded sleeve rod drives the pressure plate to move in the direction of the filter plate, and the pressure plate presses the impurities, so that the water stains contained in the impurities are squeezed out, and the low-chloride ferrous lactate dissolved in water after squeezing and filtering flows into the collection box through the inlet pipe for collection. When the push plate moves in the direction of the impurities, the pressure plate is away from the impurities, and the push plate pushes the impurities into the drainage slide, which is convenient for processing the impurities and enhances the impurity removal and separation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic structural diagram of a dedicated device for removing impurities and separating low-chloride ferrous lactate according to the present invention;

[0016] Figure 2 This is a schematic cross-sectional view of the special device for removing impurities and separating low-chloride ferrous lactate of the present invention;

[0017] Figure 3 This is a schematic structural diagram of a dedicated device for removing impurities and separating low-chloride ferrous lactate according to the present invention;

[0018] Figure 4 This is a schematic structural diagram of the extrusion discharging mechanism of the present utility model.

[0019] In the picture:

[0020] 10. Collection box; 11. Discharge pipe; 12. Inlet pipe; 13. Delivery cylinder;

[0021] 20. Connecting pipe; 21. Mixing cylinder; 22. Solenoid valve; 23. Feed port;

[0022] 30. First miter gear; 31. Mounting frame; 32. Operating motor; 33. Assembly block;

[0023] 40. Movable rod; 41. First sprocket; 42. Second miter gear; 43. Conveyor rod;

[0024] 50. Second sprocket; 51. Chain; 52. Output pipe; 53. Drainage pipe;

[0025] 60. Separation box; 61. Separation port; 62. Drainage slide; 63. Inverted L-shaped bracket;

[0026] 70. Operation block; 71. Rotating rod; 72. Mixing blade; 73. Threaded conveying blade;

[0027] 80. Connecting hole; 81. Filter plate; 82. Rotating chamber; 83. Traction chamber; 84. Vertical rod; 85. Traction rack;

[0028] 90. Threaded sleeve; 91. Sliding block; 92. Transmission screw; 93. Traction gear; 94. Pressure plate; 95. L-shaped support frame; 96. Cylinder; 97. Piston rod; 98. Push plate; 99. Fixed rod. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The following is combined with Figure 1 —4 Further details of this application:

[0031] The embodiment of this application discloses a special device for removing impurities and separating low-chloride ferrous lactate. Figure 1 and Figure 2 as well as Figure 4, a special device for removing impurities and separating low-chloride ferrous lactate, including a collecting box 10, a discharge pipe 11 is fixedly installed on the collecting box 10, an inlet pipe 12 is fixedly installed on the collecting box 10, a separation box 60 is fixedly installed at one end of the inlet pipe 12, the separation box 60 is a conical funnel, and the symmetrical sides of the separation box 60 are penetrated by a separation port 61 that is connected to the interior of the separation box 60, the inner wall of the separation box 60 is fixedly installed with a filter plate 81, the surface of the filter plate 81 is on the same surface as the bottom surface of the separation port 61, the side of the separation box 60 is fixedly installed with a drainage slide 62 located below the separation port 61, the other side of the separation box 60 is fixedly installed with an L-shaped support frame 95, and the L-shaped support frame 95 is fixedly equipped with a cylinder 9 6. The output end of the cylinder 96 is fixedly equipped with a piston rod 97, which movably passes through the L-shaped support frame 95, and one end of the piston rod 97 is fixedly equipped with a push plate 98 that moves in the separation port 61. The separation box 60 is fixedly equipped with an inverted L-shaped bracket 63, and the bottom of the inverted L-shaped bracket 63 is fixedly equipped with an operating block 70. The interior of the operating block 70 is provided with a rotating chamber 82, and the rotating chamber 82 is symmetrically provided with a traction chamber 83. The rotating chamber 82 is movably equipped with a threaded sleeve 90, which movably passes through the operating block 70, and the bottom of the threaded sleeve 90 is fixedly equipped with a pressure plate 94, which is located above the filter plate 81, and the upper surface of the threaded sleeve 90 is symmetrically fixed with a traction chamber 83. The sliding block 91 moves, and a transmission screw 92 that is threadedly assembled with the threaded sleeve 90 is movably assembled on the rotating chamber 82. One end of the transmission screw 92 movably penetrates the operating block 70 and the inverted L-shaped bracket 63, and the top of the transmission screw 92 is fixedly assembled with a traction gear 93. A fixed rod 99 is fixedly assembled on the piston rod 97, and one end of the fixed rod 99 is fixedly assembled with a vertical rod 84. The top of the vertical rod 84 is fixedly assembled with a traction rack 85 that is toothed with the traction gear 93. The low-chloride ferrous lactate dissolved in water falls into the second sprocket 50 with impurities, so that the impurities are filtered out. The cylinder 96 is started, so that the piston rod 97 drives the push plate 98 to move, and the push plate 98 moves away from the separation box 60. The piston rod 97 The vertical rod 84 on the fixed rod 99 is driven to move, and the vertical rod 84 drives the traction rack 85 to move, and the traction rack 85 drives the traction gear 93 to rotate, so that the transmission screw 92 rotates in the threaded sleeve 90, and the sliding block 91 moves on the traction chamber 83. At this time, the threaded sleeve 90 drives the pressure plate 94 to move toward the filter plate 81, and the pressure plate 94 presses the impurities so that the water stains contained in the impurities are squeezed out. The low-chloride ferrous lactate dissolved in water after squeezing and filtration flows into the collection box 10 through the inlet pipe 12 for collection. When the push plate 98 moves toward the impurities, the pressure plate 94 moves away from the impurities, and the push plate 98 pushes the impurities into the drainage slide 62, which is convenient for processing the impurities.

[0032] Reference Figure 1 and Figure 2, the separation box 60 is fixedly equipped with a drainage tube 53, one end of the drainage tube 53 is fixedly equipped with an output tube 52, the top of the drainage tube 53 is fixedly equipped with a delivery cylinder 13, the interior of the delivery cylinder 13 is connected with the interior of the separation box 60 through the output tube 52 and the interior of the drainage tube 53, and the drainage tube 53 is located above the filter plate 81 at the internal connection of the separation box 60, the delivery cylinder 13 is fixedly equipped with a connecting pipe 20, the top of the connecting pipe 20 is fixedly equipped with a mixing cylinder 21, the connecting pipe 20 is fixedly equipped with a solenoid valve 22, the delivery cylinder 13 is movably equipped with a delivery rod 43, one end of the delivery rod 43 is fixedly equipped with a second sprocket 50, and the delivery rod 43 is fixedly equipped with a screw located inside the delivery cylinder 13 The conveying blade 73 is provided at the bottom of the conveying cylinder 13 with a connecting hole 80 connected to the inside of the conveying cylinder 13, and the connecting hole 80 on the conveying cylinder 13 is located above the collecting box 10. The mixing cylinder 21 is provided with a feed port 23, and the mixing cylinder 21 is movably equipped with a rotating rod 71, and the rotating rod 71 is fixedly equipped with a stirring blade 72. The rotating rod 71 is fixedly equipped with a first miter gear 30, and the mixing cylinder 21 is fixedly equipped with a mounting frame 31, and the mounting frame 31 is also fixedly equipped with an operating motor 32. The operating motor 32 movably passes through the mounting frame 31, and the output end of the operating motor 32 is fixedly assembled with the rotating rod 71. The mixing cylinder 21 is fixedly equipped with an assembly block 33, and the assembly block 33 is movable. A movable rod 40 is equipped, one end of which is fixedly equipped with a second miter gear 42, and the second miter gear 42 is toothed with the first miter gear 30. The other end of the movable rod 40 is fixedly equipped with a first sprocket 41, and a chain 51 is wound around the first sprocket 41 and the second sprocket 50. Water and the prepared low-chloride ferrous lactate are poured into the mixing drum 21. Due to improper operation or poor environmental control, the prepared low-chloride ferrous lactate product may contain impurities. The operating motor 32 is started to make the rotating rod 71 drive the stirring blade 72 to stir, so that the low-chloride ferrous lactate is dissolved in the water. The solenoid valve 22 is started to allow the low-chloride ferrous lactate dissolved in the water to enter the conveying drum through the connecting pipe 20. In the cylinder 13, the rotating rod 71 drives the first miter bevel gear 30 to rotate, the first miter bevel gear 30 drives the second miter bevel gear 42 to rotate, the second miter bevel gear 42 drives the first sprocket 41 to rotate through the movable rod 40, and the first sprocket 41 drives the second sprocket 50 to rotate through the chain 51, so that the conveying rod 43 drives the threaded conveying blade 73 to convey the low-chloride ferrous lactate dissolved in the water. Under the action of the connecting hole 80, a part of the low-chloride ferrous lactate dissolved in the water falls into the collecting box 10 for collection, and the other part of the low-chloride ferrous lactate dissolved in the water carries impurities into the separation box 60 through the output pipe 52 and the drainage pipe 53, so that the low-chloride ferrous lactate dissolved in the water is filtered by the filter plate 81.

[0033] Working principle: Pour water and the prepared low-chloride ferrous lactate into the mixing barrel 21. Due to improper operation or poor environmental control, the prepared low-chloride ferrous lactate product may contain impurities. Start the operating motor 32, so that the rotating rod 71 drives the stirring blade 72 to stir, so that the low-chloride ferrous lactate is dissolved in the water. Start the solenoid valve 22, so that the low-chloride ferrous lactate dissolved in the water enters the conveying barrel 13 through the connecting pipe 20. The rotating rod 71 drives the first miter gear 30 to rotate. The first miter gear 30 drives the second miter bevel gear 42 to rotate, the second miter bevel gear 42 drives the first sprocket 41 to rotate through the movable rod 40, the first sprocket 41 drives the second sprocket 50 to rotate through the chain 51, so that the conveying rod 43 drives the threaded conveying blade 73 to convey the low-chloride ferrous lactate dissolved in the water. Under the action of the connecting hole 80, a part of the low-chloride ferrous lactate dissolved in the water falls into the collection box 10 for collection, and the other part of the low-chloride ferrous lactate dissolved in the water carries impurities through the output pipe 52 and the drainage pipe 53. The ferrous lactate enters the separation box 60, so that the low-chloride ferrous lactate dissolved in the water is filtered by the filter plate 81, and the cylinder 96 is started, so that the piston rod 97 drives the push plate 98 to move, and the push plate 98 moves away from the separation box 60. The piston rod 97 drives the vertical rod 84 on the fixed rod 99 to move, and the vertical rod 84 drives the traction rack 85 to move, and the traction rack 85 drives the traction gear 93 to rotate, so that the transmission screw 92 rotates in the threaded sleeve 90, and the sliding block 91 moves on the traction cavity 83. At this time, the threaded sleeve 90 is rotated. The sleeve rod 90 drives the pressure plate 94 to move toward the filter plate 81. The pressure plate 94 presses the impurities so that the water stains contained in the impurities are squeezed out. The low-chloride ferrous lactate dissolved in water after squeezing and filtration flows into the collection box 10 through the inlet pipe 12 for collection. When the push plate 98 moves toward the impurities, the pressure plate 94 moves away from the impurities, and the push plate 98 pushes the impurities into the drainage slide 62, which is convenient for processing the impurities, improves the processing of water stains on the impurities, reduces the waste of resources, and enhances the impurity removal and separation effects.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A special device for removing impurities and separating low-chloride ferrous lactate, characterized by: The invention comprises a collecting box (10), wherein the collecting box (10) is fixedly equipped with a discharge pipe (11), the collecting box (10) is fixedly equipped with an inlet pipe (12), one end of the inlet pipe (12) is fixedly equipped with a separation box (60), the separation box (60) is a conical funnel, and the symmetrical sides of the separation box (60) are penetrated by separation ports (61), the separation ports (61) are connected with the interior of the separation box (60), the inner wall of the separation box (60) is fixedly equipped with a filter plate (81), the side of the separation box (60) is fixedly equipped with a drainage slide (62), the drainage slide (62) is located below the separation port (61), the other side of the separation box (60) is fixedly equipped with an L-shaped support frame (95), the L-shaped support frame (95) is fixedly equipped with a cylinder (96), the cylinder (96) is fixedly equipped with a filter plate (81), and the side of the separation box (60) is fixedly equipped with a drainage slide (62), and the drainage slide (62) is located below the separation port (61). The output end of the filter housing 6) is fixedly equipped with a piston rod (97), the piston rod (97) movably passes through the L-shaped support frame (95), and one end of the piston rod (97) is fixedly equipped with a push plate (98), the push plate (98) is movably assembled with the separation port (61), the separation box (60) is fixedly equipped with an inverted L-shaped bracket (63), the bottom of the inverted L-shaped bracket (63) is fixedly equipped with an operating block (70), a rotating chamber (82) is provided inside the operating block (70), a traction chamber (83) is symmetrically provided on the rotating chamber (82), a threaded sleeve rod (90) is movably equipped on the rotating chamber (82), the threaded sleeve rod (90) movably passes through the operating block (70), and a pressing plate (94) is fixedly equipped at the bottom of the threaded sleeve rod (90), and the pressing plate (94) is located above the filter plate (81).

2. The low-chloride ferrous lactate impurity removal and separation device according to claim 1, wherein: The surface of the filter plate (81) is flush with the bottom surface of the separation port (61).

3. The low-chloride ferrous lactate impurity removal and separation device according to claim 1, wherein: A sliding block (91) is symmetrically fixedly assembled on the upper surface of the threaded sleeve (90), and the sliding block (91) is movably assembled with the traction chamber (83). A transmission screw (92) is movably assembled on the rotating chamber (82), and the transmission screw (92) is threadedly assembled with the threaded sleeve (90). One end of the transmission screw (92) movably passes through the operating block (70) and the inverted L-shaped bracket (63), and a traction gear (93) is fixedly assembled on the top of the transmission screw (92).

4. The low-chloride ferrous lactate impurity removal and separation device according to claim 3, wherein: A fixed rod (99) is fixedly assembled on the piston rod (97), a vertical rod (84) is fixedly assembled on one end of the fixed rod (99), a traction rack (85) is fixedly assembled on the top of the vertical rod (84), and the traction rack (85) and the traction gear (93) are toothed.

5. The low-chloride ferrous lactate impurity removal and separation device according to claim 1, characterized in that: The separation box (60) is fixedly equipped with a drainage tube (53), one end of the drainage tube (53) is fixedly equipped with an output tube (52), the top of the drainage tube (53) is fixedly equipped with a delivery cylinder (13), the interior of the delivery cylinder (13) is connected to the interior of the separation box (60) through the output tube (52) and the interior of the drainage tube (53), and the drainage tube (53) is located above the filter plate (81) at the internal connection point of the separation box (60), the delivery cylinder (13) is fixedly equipped with a connecting tube (20), the top of the connecting tube (20) is fixedly equipped with a mixing cylinder ( 21), a solenoid valve (22) is fixedly mounted on the connecting pipe (20), a conveying rod (43) is movably mounted on the conveying cylinder (13), one end of the conveying rod (43) is fixedly mounted with a second sprocket (50), a threaded conveying blade (73) is fixedly mounted on the conveying rod (43), the threaded conveying blade (73) is located inside the conveying cylinder (13), a communicating hole (80) is provided at the bottom of the conveying cylinder (13), the communicating hole (80) is connected to the inside of the conveying cylinder (13), and the communicating hole (80) on the conveying cylinder (13) is located above the collecting box (10).

6. The low-chloride ferrous lactate impurity removal and separation device according to claim 5, characterized in that: The mixing drum (21) is provided with a feed port (23), a rotating rod (71) is movably mounted on the mixing drum (21), a stirring blade (72) is fixedly mounted on the rotating rod (71), a first equal diameter bevel gear (30) is fixedly mounted on the rotating rod (71), a mounting frame (31) is fixedly mounted on the mixing drum (21), an operating motor (32) is also fixedly mounted on the mounting frame (31), the operating motor (32) movably passes through the mounting frame (31), and an output end of the operating motor (32) is fixedly mounted on the mounting frame (31). The mixing cylinder (21) is fixedly assembled with an assembly block (33), and the assembly block (33) is movably assembled with a movable rod (40). One end of the movable rod (40) is fixedly assembled with a second equal-diameter bevel gear (42), and the second equal-diameter bevel gear (42) is tooth-grooved with the first equal-diameter bevel gear (30). The other end of the movable rod (40) is fixedly assembled with a first sprocket (41), and a chain (51) is wound around the first sprocket (41) and the second sprocket (50).

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