Preparation method of high-temperature-resistant steel

Abstract

The invention discloses a preparation method of high-temperature-resistant steel, and belongs to the technical field of steel preparation, and the preparation method is technically characterized in that a mounting base is included, and the preparation method further comprises the steps that firstly, smelted molten steel is cast into a steel ingot through machining equipment, and the steel ingot falls onto a first receiving piece through a discharging mechanism; secondly, a first conveying belt drives a first material receiving piece to move, and the steel ingots on the first material receiving piece are clamped through a material clamping mechanism; thirdly, the rotating direction changing mechanism drives the clamping mechanism to move, and the steel ingots are placed on the second receiving piece from the first receiving piece; and fourthly, a second conveying belt drives a second material receiving piece to move, the second conveying belt drives the steel ingots to conduct heat treatment, and the beneficial effect that high-temperature-resistant treatment can be conducted on steel can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of steel preparation, and in particular to a method for preparing high-temperature resistant steel. Background Art

[0002] High-quality steel is usually used in construction projects, machinery manufacturing and other scenarios. The corresponding preparation machines can be used to quench and temper the raw materials at high temperatures to obtain the corresponding high-quality steel, thereby improving the steel's ablation resistance and extending the service life of the barrel.

[0003] Today's society is developing rapidly, and buildings are also rising. Among them, steel is one of the indispensable materials in the construction process. As the height of buildings has increased significantly and the design structure is extremely complex. This requires consideration of the high temperature resistant design of buildings. However, among the current steel materials, there are very few high temperature resistant steels. Therefore, the invention of a high temperature resistant steel is an urgent problem to be solved. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the embodiments of the present invention is to provide a method for preparing high temperature resistant steel to solve the problems in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for preparing a high temperature resistant steel material comprises a mounting base and further comprises: Step 1: The smelted molten steel is cast into a steel ingot through a processing device, and the steel ingot falls onto the first receiving piece through a feeding mechanism; Step 2: The first conveyor belt drives the first receiving piece to move, and the steel ingot on the first receiving piece is clamped by the clamping mechanism; Step 3: The rotating direction-changing mechanism drives the clamping mechanism to move, and the steel ingot is placed from the first receiving piece to the second receiving piece; Step 4: The second conveyor belt drives the second receiving piece to move, and the second conveyor belt drives the steel ingot to perform heat treatment.

[0006] As a further solution of the present invention, the feeding mechanism in step 1 includes: A mounting assembly, the mounting assembly being mounted on a mounting base via a third column, the mounting assembly being movably connected to the processing equipment; A material removal component is movably connected to the mounting component, and the material removal component is arranged above the first material receiving member.

[0007] As a further solution of the present invention, the installation assembly includes: A first mounting seat, wherein the first mounting seat is mounted on a mounting base through a third column, and the processing equipment is arranged on the first mounting seat; A guide groove, wherein the guide groove is arranged on the inner side of the first mounting seat, and the guide groove is movably connected to the blanking assembly.

[0008] As a further solution of the present invention, the material assembly includes: A slide plate, the slide plate is movably connected to the guide groove, a round hole for material removal is provided on one side of the slide plate, and the round hole for material removal is provided above the first material receiving member; A redirecting plate, one end of which is fixedly connected to the first mounting seat, the redirecting plate is movably connected to a material discharge baffle, and the material discharge baffle is movably connected to the material discharge circular hole.

[0009] As a further solution of the present invention, the clamping mechanism comprises: A control component, one end of which is fixedly connected to a first mounting plate, and the first mounting plate is fixedly connected to the rotation direction-changing mechanism; A material clamping assembly, one end of which is fixedly connected to the first mounting plate, and the material clamping assembly is movably connected to the control assembly.

[0010] As a further solution of the present invention, the control component includes: A telescopic rod, one end of which is fixedly connected to the first mounting plate, and the telescopic rod and the first material receiving member are located in the same horizontal plane; A second mounting seat, wherein the second mounting seat is fixedly connected to the telescopic rod, and the second mounting seat is movably connected to the material clamping assembly.

[0011] As a further solution of the present invention, the clamping assembly comprises: a first rotating rod, one end of which is movably connected to the first mounting plate, and the other end of which is movably connected to a second rotating rod; A clamping rod, one end of which is movably connected to the second rotating rod, and the clamping rod and the second rotating rod are movably connected to the second mounting seat.

[0012] As a further solution of the present invention, the rotation direction changing mechanism comprises: A third mounting seat, the third mounting seat is fixedly connected to the mounting base, and a rotating assembly is installed on one side of the third mounting seat; A direction-changing component, wherein the output end of the rotating component is movably connected to the direction-changing component, and the direction-changing component is arranged on one side of the third mounting seat; A third mounting plate is fixedly connected to the direction-changing assembly, and the first mounting plate is arranged on the third mounting plate.

[0013] As a further solution of the present invention, the rotating assembly includes: A second mounting plate, the second mounting plate is fixedly connected to the third mounting seat, a rotating member is provided on one side of the second mounting plate, and an output end of the rotating member is connected to a rotating rod; A mounting block, wherein the mounting block is movably connected to the rotating rod, the mounting block is movably connected to a limit frame, the limit frame is movably connected to the third mounting seat, and the limit frame is connected to the direction-changing component.

[0014] As a further solution of the present invention, the direction-changing component comprises: A fixed rack, the fixed rack is fixedly connected to the third mounting seat, the fixed rack is movably connected to a redirecting gear, and the redirecting gear is movably connected to the mounting block; A first limiting rod, wherein the first limiting rod is arranged on the third mounting seat, the third mounting seat is provided with a second limiting rod, and the first limiting rod and the second limiting rod are symmetrically arranged with respect to the third mounting seat; A connecting groove is arranged on the redirecting gear, and the connecting groove is movably connected to the first limiting rod and the second limiting rod.

[0015] In summary, compared with the prior art, the embodiments of the present invention have the following beneficial effects: The slide plate is a power part, which makes the slide plate slide in the guide groove. The slide plate is movably connected to the bottom of the processing equipment. After the processing equipment makes the molten steel into ingots, it plays the role of switch control at the bottom of the processing equipment. The ingot will fall into the feeding circular hole. The slide plate is started and moves to the left. At this time, the contact area between the redirecting plate and the feeding baffle is gradually reduced, so that the feeding baffle rotates until it is fully opened. After the feeding baffle is opened, the ingot located in the feeding circular hole will fall into the first receiving piece located directly below, completing one feeding. During the discharge process, the slide moves to the bottom of the processing equipment, so that the steel ingot is in the processing equipment, until the slide moves to the right, until the discharge hole moves to the bottom of the processing equipment, and the next steel ingot is received and discharged.

[0016] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the invention.

[0018] Figure 2 In the embodiment of the invention Figure 1 Schematic diagram of the structure of the middle and lower feeding mechanism.

[0019] Figure 3 In the embodiment of the invention Figure 2 Side view of.

[0020] Figure 4 In the embodiment of the invention Figure 1 Schematic diagram of the clamping mechanism structure.

[0021] Figure 5 In the embodiment of the invention Figure 1 Schematic diagram of the rotational direction-changing mechanism structure.

[0022] Figure 6 In the embodiment of the invention Figure 6 Schematic diagram of the rotating component structure.

[0023] Figure 7 In the embodiment of the invention Figure 6 Schematic diagram of the change-of-direction component structure.

[0024] Figure numerals: 1-mounting base, 2-first column, 3-first conveyor belt, 4-processing equipment, 5-feeding mechanism, 51-mounting assembly, 511-first mounting seat, 512-guide groove, 52-feeding assembly, 521-slide plate, 522-feeding circular hole, 523-redirecting plate, 524-feeding baffle, 6-first material receiving member, 7-clamping mechanism, 71-control assembly, 711-telescopic rod, 712-second mounting seat, 72-clamping assembly, 721-first rotating rod, 722-second rotating rod, 72 3-clamping rod, 8-first mounting plate, 9-rotational changing mechanism, 91-third mounting seat, 92-rotational assembly, 921-second mounting plate, 922-rotational member, 923-rotational rod, 924-mounting block, 925-limiting frame, 93-changing assembly, 931-fixed rack, 932-first limiting rod, 933-redirecting gear, 934-second limiting rod, 935-connecting groove, 91-third mounting plate, 10-second material receiving member, 11-second conveyor belt, 12-second column, 13-third column. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0027] In one embodiment, a method for preparing a high temperature resistant steel material is described in detail. Figure 1 to Figure 7 , including a mounting base 1, and further comprising: Step 1: The molten steel after smelting is cast into a steel ingot through the processing equipment 4, and the steel ingot falls onto the first receiving member 6 through the unloading mechanism 5; Step 2: The first conveyor belt 3 drives the first receiving piece 6 to move, and the steel ingot on the first receiving piece 6 is clamped by the clamping mechanism 7; Step 3: The rotating direction-changing mechanism 9 drives the clamping mechanism 7 to move, and places the steel ingot from the first receiving piece 6 to the second receiving piece 10; Step 4: The second material receiving member 10 is driven to move by the second conveyor belt 11, and the second conveyor belt 11 drives the steel ingot to undergo heat treatment.

[0028] In this embodiment, the smelted molten steel is cast into a steel ingot through the processing equipment 4, and the molten steel is cast into a continuous steel billet through the continuous casting machine, which is suitable for large-scale production. The steel ingot falls onto the first material receiving piece 6 through the unloading mechanism 5. The first material receiving piece 6 adopts a semi-arc structure, which can effectively prevent the steel ingot on the first material receiving piece 6 from shaking and falling onto the first conveyor belt 3 when it falls. The first conveyor belt 3 drives the first material receiving piece 6 to move. After the first material receiving piece 6 moves to one end of the first conveyor belt 3, the steel ingot on the first material receiving piece 6 is clamped by the clamping mechanism 7, and the clamping mechanism 7 is used to clamp the steel ingot. Afterwards, the rotating direction-changing mechanism 9 drives the clamping mechanism 7 to move, and the rotating direction-changing mechanism 9 moves the clamping mechanism 7 from the first conveyor belt 3 to the second conveyor belt 11, and then opens the clamping mechanism 7, places the steel ingot from the first receiving piece 6 to the second receiving piece 10, and drives the second receiving piece 10 to move through the second conveyor belt 11, and the second conveyor belt 11 drives the steel ingot to perform heat treatment. In order to improve the mechanical properties and microstructure of high-temperature resistant steel, heat treatment processes are necessary, such as annealing, normalizing, quenching and tempering. The heat treatment process can improve the oxidation resistance, strength and plasticity of the steel. The first conveyor belt 3 is installed on the mounting base 1 through the first column 2, the second conveyor belt 11 is installed on the mounting base 1 through the second column 12, and the unloading mechanism 5 is installed on the mounting base 1 through the third column 13. The height of the first column 2 is greater than that of the second column 12, so that the movement of the steel ingot can be smoother, and the interval of the steel ingot transportation process can be increased to ensure that the steel ingot will not be processed for insufficient time during the processing process.

[0029] In one embodiment, see Figure 1 to Figure 7 In the step 1, the feeding mechanism 5 comprises: An installation component 51, wherein the installation component 51 is installed on the installation base 1 through the third column 13, and the installation component 51 is movably connected to the processing equipment 4; A material removal component 52 , wherein the material removal component 52 is movably connected to the mounting component 51 , and the material removal component 52 is arranged above the first material receiving member 6 .

[0030] For further information, see Figure 1 to Figure 7 , the installation component 51 includes: A first mounting seat 511, wherein the first mounting seat 511 is mounted on the mounting base 1 through a third column 13, and the processing equipment 4 is disposed on the first mounting seat 511; A guide groove 512 , wherein the guide groove 512 is disposed on the inner side of the first mounting seat 511 , and the guide groove 512 is movably connected to the blanking assembly 52 .

[0031] For further information, see Figure 1 to Figure 7 , the material component 52 comprises: A slide plate 521, wherein the slide plate 521 is movably connected to the guide groove 512, and a material discharge circular hole 522 is provided on one side of the slide plate 521, and the material discharge circular hole 522 is provided above the first material receiving member 6; The redirecting plate 523 has one end fixedly connected to the first mounting seat 511 , and the redirecting plate 523 is movably connected to the material discharge baffle 524 , and the material discharge baffle 524 is movably connected to the material discharge circular hole 522 .

[0032] In this embodiment, the slide plate 521 is a power part, so that the slide plate 521 slides in the guide groove 512. The slide plate 521 is movably connected to the bottom of the processing equipment 4. After the processing equipment 4 makes the molten steel into a steel ingot, it plays a switch control role at the bottom of the processing equipment 4, and the steel ingot falls into the discharge circular hole 522. The slide plate 521 is started and moves to the left. At this time, the contact area between the redirecting plate 523 and the discharge baffle 524 gradually decreases, so that the discharge baffle 524 rotates until it is fully opened. After the discharge baffle 524 is opened, the steel ingot located in the discharge circular hole 522 will fall into the first material receiving member 6 located directly below, completing one discharge. During the discharge process, the slide plate 521 moves to the bottom of the processing equipment 4, so that the steel ingot is in the processing equipment 4, until the slide plate 521 moves to the right, until the discharge hole 522 moves to the bottom of the processing equipment 4, and the next steel ingot is received and discharged.

[0033] In one embodiment, see Figure 1 to Figure 7 , the clamping mechanism 7 comprises: A control component 71, one end of which is fixedly connected to a first mounting plate 8, and the first mounting plate 8 is fixedly connected to the rotation direction-changing mechanism 9; The material clamping component 72 has one end fixedly connected to the first mounting plate 8 , and the material clamping component 72 is movably connected to the control component 71 .

[0034] For further information, see Figure 1 to Figure 7 , the control component 71 includes: A telescopic rod 711, one end of which is fixedly connected to the first mounting plate 8, and the telescopic rod 711 and the first material receiving member 6 are located in the same horizontal plane; The second mounting seat 712 is fixedly connected to the telescopic rod 711 , and the second mounting seat 712 is movably connected to the clamping assembly 72 .

[0035] For further information, see Figure 1 to Figure 7 , the clamping assembly 72 includes: A first rotating rod 721, one end of which is movably connected to the first mounting plate 8, and the other end of which is movably connected to the second rotating rod 722; A clamping rod 723 , one end of which is movably connected to the second rotating rod 722 , and the clamping rod 723 and the second rotating rod 722 are movably connected to the second mounting seat 712 .

[0036] In this embodiment, a groove is provided at the center position of the second mounting seat 712, and the telescopic rod 711 is a power member. At this time, the telescopic rod 711 is started, and the telescopic rod 711 drives the second mounting seat 712 to approach the first material receiving member 6. Since the second mounting seat 712 is movably connected to the first rotating rod 721 and the second rotating rod 722 through the rotating pin, the second mounting seat 712 drives the first rotating rod 721 and the second rotating rod 722 to rotate. The first rotating rod 721 and the second rotating rod 722 are symmetrically arranged with respect to the second mounting seat 712, and the symmetrically arranged first rotating rod 721 and the second rotating rod 722 approach each other, and the second rotating rod 722 drives the clamping rod 723 to approach each other. The clamping rods 723 that are close to each other clamp the steel ingot on the first material receiving piece 6 to ensure that the clamping rods 723 can clamp the steel ingot. At this time, the telescopic rod 711 stops moving to ensure that the steel ingot will not fall after being clamped. When the steel ingot needs to be placed on the second material receiving piece 10, the telescopic rod 711 is shortened. At this time, the clamping rods 723 move away from each other to ensure that the steel ingot falls on the second material receiving piece 10.

[0037] In one embodiment, see Figure 1 to Figure 7 , the rotational direction-changing mechanism 9 comprises: A third mounting seat 91, wherein the third mounting seat 91 is fixedly connected to the mounting base 1, and a rotating assembly 92 is installed on one side of the third mounting seat 91; A direction-changing component 93, wherein the output end of the rotating component 92 is movably connected to the direction-changing component 93, and the direction-changing component 93 is arranged on one side of the third mounting seat 91; A third mounting plate 94 is fixedly connected to the direction-changing assembly 93 , and a first mounting plate 8 is arranged on the third mounting plate 94 .

[0038] For further information, see Figure 1 to Figure 7 , the rotating assembly 92 comprises: A second mounting plate 921, wherein the second mounting plate 921 is fixedly connected to the third mounting seat 91, a rotating member 922 is disposed on one side of the second mounting plate 921, and an output end of the rotating member 922 is connected to a rotating rod 923; The mounting block 924 is movably connected to the rotating rod 923 , the mounting block 924 is movably connected to the limiting frame 925 , the limiting frame 925 is movably connected to the third mounting seat 91 , and the limiting frame 925 is connected to the direction-changing component 93 .

[0039] For further information, see Figure 1 to Figure 7 , the direction changing component 93 comprises: A fixed rack 931, wherein the fixed rack 931 is fixedly connected to the third mounting seat 91, wherein the fixed rack 931 is movably connected to a redirecting gear 933, and wherein the redirecting gear 933 is movably connected to the mounting block 924; A first limiting rod 932, wherein the first limiting rod 932 is disposed on the third mounting seat 91, and the third mounting seat 91 is provided with a second limiting rod 934, and the first limiting rod 932 and the second limiting rod 934 are symmetrically disposed with respect to the third mounting seat 91; A connecting groove 935 is provided on the redirecting gear 933 , and the connecting groove 935 is movably connected to both the first limiting rod 932 and the second limiting rod 934 .

[0040] In this embodiment, the rotating member 922 is a power member. When the rotating member 922 is started, the rotating member 922 drives the rotating rod 923 to rotate, and the rotating rod 923 drives the mounting block 924 to move. Since the mounting block 924 is arranged in the limiting frame 925, the limiting frame 925 is a square structure. At the same time, a square through hole is arranged at the center position of the third mounting seat 91. The limiting frame 925 is movably connected to the square through hole to ensure that the movement trajectory of the limiting frame 925 is up and down movement. The mounting block 924 reciprocates left and right in the limiting frame 925, and at the same time, the mounting block 924 drives the limiting frame 925 to move up and down along the third mounting seat 91. When the third mounting seat 91 moves up and down, the third mounting seat 91 drives the redirecting gear 933 to move up and down. When the redirecting gear 933 contacts the fixed rack 931, the fixed rack 931 changes the direction of the redirecting gear 933, and the redirecting gear 933 drives the third mounting plate 94 to change direction, so as to place the steel ingot from the first receiving piece 6 to the second receiving piece 10. When the redirecting gear 933 moves up and down, the connecting groove 935 fixes the redirecting gear 933. When the connecting groove 935 contacts the first limit rod 932 and the second limit rod 934, the redirecting gear 933 can stop moving, ensuring that the movement trajectory of the third mounting plate 94 can move from above the first material receiving piece 6 to above the second material receiving piece 10. At the same time, when the third mounting plate 94 rotates, it can move up and down, ensuring that the steel ingot moves to above the second material receiving piece 10 for subsequent heat treatment process.

[0041] The working principle of the present invention is: The slide plate 521 is a power part, so that the slide plate 521 slides in the guide groove 512. The slide plate 521 is movably connected to the bottom of the processing equipment 4. After the processing equipment 4 makes the molten steel into a steel ingot, the slide plate 521 plays a switch control role at the bottom of the processing equipment 4. The steel ingot will fall into the discharge circular hole 522. The slide plate 521 is started and moves to the left. At this time, the contact area between the redirecting plate 523 and the discharge baffle 524 is gradually reduced, so that the discharge baffle 524 rotates until it is fully opened. After the discharge baffle 524 is opened, the steel ingot located in the discharge circular hole 522 will fall into the first material receiving member 6 located directly below, completing one discharge. During the discharge process, the slide plate 521 moves to the bottom of the processing equipment 4, so that the steel ingot is in the processing equipment 4, until the slide plate 521 moves to the right, until the discharge hole 522 moves to the bottom of the processing equipment 4, and the next steel ingot is received and discharged.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing high temperature resistant steel, comprising a mounting base, characterized in that: Also includes: Step 1: The smelted molten steel is cast into a steel ingot through a processing device, and the steel ingot falls onto the first receiving piece through a feeding mechanism; Step 2: The first conveyor belt drives the first receiving piece to move, and the steel ingot on the first receiving piece is clamped by the clamping mechanism; Step 3: The rotating direction-changing mechanism drives the clamping mechanism to move, and the steel ingot is placed from the first receiving piece to the second receiving piece; Step 4: The second conveyor belt drives the second receiving piece to move, and the second conveyor belt drives the steel ingot to perform heat treatment.

2. The method for preparing high temperature resistant steel according to claim 1, characterized in that: The unloading mechanism in step 1 comprises: A mounting assembly, the mounting assembly being mounted on a mounting base via a third column, the mounting assembly being movably connected to the processing equipment; A material removal component is movably connected to the mounting component, and the material removal component is arranged above the first material receiving member.

3. The method for preparing high temperature resistant steel according to claim 2, characterized in that: The installation assembly includes: A first mounting seat, wherein the first mounting seat is mounted on a mounting base through a third column, and the processing equipment is arranged on the first mounting seat; A guide groove, wherein the guide groove is arranged on the inner side of the first mounting seat, and the guide groove is movably connected to the blanking assembly.

4. The method for preparing high temperature resistant steel according to claim 3, characterized in that: The material assembly comprises: A slide plate, the slide plate is movably connected to the guide groove, a round hole for material removal is provided on one side of the slide plate, and the round hole for material removal is provided above the first material receiving member; A redirecting plate, one end of which is fixedly connected to the first mounting seat, the redirecting plate is movably connected to a material discharge baffle, and the material discharge baffle is movably connected to the material discharge circular hole.

5. The method for preparing high temperature resistant steel according to claim 1, characterized in that: The clamping mechanism comprises: A control component, one end of which is fixedly connected to a first mounting plate, and the first mounting plate is fixedly connected to the rotation direction-changing mechanism; A material clamping assembly, one end of which is fixedly connected to the first mounting plate, and the material clamping assembly is movably connected to the control assembly.

6. The method for preparing high temperature resistant steel according to claim 5, characterized in that: The control component comprises: A telescopic rod, one end of which is fixedly connected to the first mounting plate, and the telescopic rod and the first material receiving member are located in the same horizontal plane; A second mounting seat, wherein the second mounting seat is fixedly connected to the telescopic rod, and the second mounting seat is movably connected to the material clamping assembly.

7. The method for preparing high temperature resistant steel according to claim 6, characterized in that: The clamping assembly comprises: a first rotating rod, one end of which is movably connected to the first mounting plate, and the other end of which is movably connected to a second rotating rod; A clamping rod, one end of which is movably connected to the second rotating rod, and the clamping rod and the second rotating rod are movably connected to the second mounting seat.

8. The method for preparing high temperature resistant steel according to claim 1, characterized in that: The rotation direction changing mechanism comprises: A third mounting seat, the third mounting seat is fixedly connected to the mounting base, and a rotating assembly is installed on one side of the third mounting seat; A direction-changing component, wherein the output end of the rotating component is movably connected to the direction-changing component, and the direction-changing component is arranged on one side of the third mounting seat; A third mounting plate is fixedly connected to the direction-changing assembly, and the first mounting plate is arranged on the third mounting plate.

9. The method for preparing high temperature resistant steel according to claim 8, characterized in that: The rotating assembly comprises: A second mounting plate, the second mounting plate is fixedly connected to the third mounting seat, a rotating member is provided on one side of the second mounting plate, and an output end of the rotating member is connected to a rotating rod; A mounting block, wherein the mounting block is movably connected to the rotating rod, the mounting block is movably connected to a limit frame, the limit frame is movably connected to the third mounting seat, and the limit frame is connected to the direction-changing component.

10. The method for preparing high temperature resistant steel according to claim 9, characterized in that: The direction-changing component comprises: A fixed rack, the fixed rack is fixedly connected to the third mounting seat, the fixed rack is movably connected to a redirecting gear, and the redirecting gear is movably connected to the mounting block; A first limiting rod, wherein the first limiting rod is arranged on the third mounting seat, the third mounting seat is provided with a second limiting rod, and the first limiting rod and the second limiting rod are symmetrically arranged with respect to the third mounting seat; A connecting groove is arranged on the redirecting gear, and the connecting groove is movably connected to the first limiting rod and the second limiting rod.

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