Steel pushing device used before hot rolling

Abstract

The invention provides a steel pushing device used before hot rolling, which comprises a conveying line used for conveying steel billets; the heating furnace is fixedly arranged on one side of the conveying line, a feeding port is formed in the side, close to the conveying line, of the heating furnace, and a furnace door is vertically and slidably arranged on the outer side of the feeding port; the pushing assembly is fixedly arranged on the other side of the conveying line and used for pushing the steel billets on the conveying line into the heating furnace, and a pushing plate is fixedly arranged at the output end of the pushing assembly; the cooling assembly is fixedly arranged on the other side of the conveying line and used for cooling the pushing assembly; one end of the linkage assembly is fixedly connected with the furnace door, the other end of the linkage assembly is fixedly connected with the cooling assembly, and a driving part used for driving the linkage assembly to open or close the furnace door is arranged on the pushing assembly. The cooling assembly is arranged to cool the push plate and the telescopic rod, so that the working temperature of the hydraulic cylinder is stabilized in a suitable range, efficiency reduction caused by oil oxidation and viscosity reduction is avoided, and the water pumping barrel, the piston and the piston rod are arranged to drive cooling liquid in the box body to cool the push plate.

Description

Technical Field

[0001] The present invention relates to the technical field of pusher machines, and in particular to a pusher device for use before hot rolling. Background Art

[0002] Hot rolling refers to the rolling of steel billets above the crystallization temperature, which can improve the processing performance of metals and alloys. In order to heat the steel billets to the crystallization temperature, the steel billets are generally pushed into the heating furnace by a hydraulic cylinder for heating. Since a large amount of heat is generated when the heating furnace is working, part of this heat is used to heat the target object, and the other part is dissipated into the surrounding environment, resulting in an increase in the surrounding environmental temperature. The hydraulic cylinder is directly opposite to the heating furnace inlet and is easily affected by the temperature, which easily causes the sealing ring in the cylinder to age and deform at high temperatures, resulting in frequent damage to the pusher hydraulic cylinder, thereby reducing the working performance of the hydraulic cylinder and the efficiency of the hydraulic system. Summary of the Invention

[0003] The main purpose of the present invention is to provide a pusher device for use before hot rolling to solve the problem in the prior art that the hydraulic cylinder is affected by the temperature of the heating furnace, causing the temperature of the hydraulic oil in the cylinder body to rise, thereby reducing the working performance of the hydraulic cylinder and the efficiency of the hydraulic system.

[0004] To solve the above problems, the present invention adopts the following technical solutions: A pusher device for use before hot rolling, comprising: A conveyor line for conveying steel billets; A heating furnace fixedly arranged on one side of the conveyor line for heating the steel billets. An inlet is provided on the side of the heating furnace close to the conveyor line, and a furnace door is vertically slidably arranged outside the inlet; A pushing assembly fixedly arranged on the other side of the conveyor line for pushing the steel billets on the conveyor line into the heating furnace. A push plate is fixedly arranged at the output end of the pushing assembly; A cooling assembly fixedly arranged on the other side of the conveyor line for cooling the pushing assembly; A linkage assembly, one end of which is fixedly connected to the furnace door, and the other end is fixedly connected to the cooling assembly. A driving part for driving the linkage assembly to open or close the furnace door is provided on the pushing assembly.

[0005] Further, a receiving space is provided in the pushing plate. A liquid inlet and a liquid outlet are respectively provided on one side of the receiving space. The cooling component includes a box body for storing coolant. The pushing component is fixedly arranged on the top surface of the box body. At least one coolant pumping and conveying component is fixedly arranged on the top surface of the box body. The input end of the coolant pumping and conveying component extends into the box body through a water suction pipe for pumping the coolant in the box body. The output end of the coolant pumping and conveying component is communicated with the liquid inlet through a first telescopic hose. The liquid outlet is communicated with the inside of the box body through a second telescopic hose. A check valve is arranged on the water suction pipe for preventing the coolant from flowing from the coolant pumping and conveying component into the inside of the box body.

[0006] Further, the coolant pumping and conveying component includes a hollow water pumping cylinder, a piston slidably arranged in the water pumping cylinder, and a piston rod fixedly arranged on one side of the piston. One end of the piston rod passes through one end of the water pumping cylinder and is fixedly connected with the pushing plate. Water inlets and water outlets are arranged at both ends of the water pumping cylinder. The two water inlets serve as the input ends of the cooling component and are respectively communicated with the inside of the box body through water suction pipes. The two water outlets are respectively communicated with the receiving space in the pushing plate through first telescopic hoses. A check valve is respectively arranged on each first telescopic hose for preventing the coolant in the first telescopic hose from flowing back into the water pumping cylinder.

[0007] Further, there are multiple coolant pumping and conveying components. A temporary storage box is fixedly arranged above the coolant pumping and conveying components. The output end of each coolant pumping and conveying component is communicated with the temporary storage box through a water delivery pipe. The temporary storage box is communicated with the liquid inlet through a first telescopic hose. A check valve is arranged at one end of the water delivery pipe for preventing the coolant in the temporary storage box from flowing back into the coolant pumping and conveying component.

[0008] Further, a plurality of partition plates are arranged in the receiving space of the pushing plate. The plurality of partition plates divide the receiving space into a plurality of cooling spaces. The temporary storage box is respectively communicated with the plurality of cooling spaces through a plurality of first telescopic hoses. Each cooling space is respectively communicated with the inside of the box body through a second telescopic hose.

[0009] Further, the pushing component includes a plurality of hydraulic cylinders fixedly arranged at intervals on the other side of the conveying line. The output ends of the plurality of hydraulic cylinders face the feeding port of the heating furnace. The hydraulic cylinder includes a cylinder body and a telescopic rod. A cooling ring is fixedly arranged on the top surface of the box body corresponding to each telescopic rod. The cooling ring is slidably sleeved outside the corresponding telescopic rod. A coolant flow channel is arranged inside the cooling ring. One end of each second telescopic hose away from the partition plate is communicated with the coolant flow channel. One side of the coolant flow channel is communicated with the inside of the box body through a return pipe.

[0010] Further, the linkage assembly includes pulling parts symmetrically arranged on both sides of the furnace door in the length direction. Each pulling part includes a pulling rope and a first runner rotatably arranged at the upper part of the heating furnace. One end of the pulling rope is fixedly connected to the top end of the furnace door, and the other end of the pulling rope bypasses the top end of the first runner and is fixedly connected to the cooling assembly. The driving part includes a second runner rotatably arranged at the top end of the push plate, and the bottom end of the second runner abuts against the pulling rope.

[0011] Further, a synchronization assembly for synchronously extending and retracting a plurality of hydraulic cylinders is fixedly arranged on the conveyor line.

[0012] Further, the synchronization assembly includes a shaft rod rotatably arranged at the bottom end of the push plate, two first gears fixedly sleeved at both ends of the shaft rod, and two first racks fixedly arranged on the conveyor line. The axial direction of the shaft rod is parallel to the length direction of the furnace door. When the push plate moves towards the heating furnace, the two first gears are respectively meshed with the two first racks.

[0013] Further, the conveyor line includes a plurality of rollers arranged at intervals for conveying the billet to the front of the feed inlet. One end of the conveyor line is fixedly provided with a positioning block, and a buffer assembly is arranged on one side of the positioning block. The buffer assembly includes a baffle, and a damper is arranged between the baffle and the positioning block.

[0014] The beneficial effects of the present invention are as follows: 1. By arranging the cooling assembly to cool the push plate and the telescopic rod, the working temperature of the hydraulic cylinder is stabilized within a suitable range, avoiding problems such as reduced efficiency and component wear caused by oxidation of the oil product and decrease in viscosity. By arranging the water pumping cylinder, the piston and the plug rod, during the process of the pushing assembly driving the plug rod to move, the coolant in the box body can be driven to cool the push plate. Thus, it is not necessary to add external equipment (such as a circulation pump) to cool the push plate. 2. By using the driving part arranged on the pushing assembly to cooperate with the linkage assembly to control the opening and closing of the furnace door, no new driving source is required, and through the pure mechanical transmission of the pulling rope - runner, the risk of failure of the telescopic cylinder in the prior art due to high temperature is avoided. 3. By the shaft rod rotatably arranged at the bottom end of the push plate, the two first gears cooperating with the two first racks, the synchronization of the moving states at both ends of the push plate is improved, thereby avoiding the problem of jamming caused by asynchronous telescoping. Description of the Drawings

[0015] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0016] Figure 1 It is a perspective view of one side of the pusher device for hot rolling before the present invention. Figure 2 Top view of the pusher device before hot rolling of the present invention; Figure 3 is Figure 2 View taken along line A-A of Figure 4 is Figure 2 View taken along line B-B of Figure 5 is Figure 2 View taken along line C-C of Figure 6 Stereogram of the other side of the pusher device before hot rolling of the present invention.

[0017] Explanation of reference numerals 1. Conveyor line; 11. Roller; 12. Positioning block; 13. Baffle; 2. Heating furnace; 21. Feed inlet; 22. Furnace door; 3. Pushing assembly; 31. Hydraulic cylinder; 311. Cylinder block; 312. Telescopic rod; 4. Cooling assembly; 41. Box body; 42. Coolant pumping assembly; 421. Water suction pipe; 422. Water pumping barrel; 4221. Water inlet; 4222. Water outlet; 4223. First water pumping space; 4224. Second water pumping space; 423. Piston; 424. Piston rod; 43. Temporary storage box; 44. Cooling ring; 5. Linkage assembly; 51. Pulling part; 511. Pulling rope; 512. First runner; 513. Second runner; 6. Pushing plate; 61. Accommodating space; 62. Liquid inlet; 63. Liquid outlet; 64. Partition board; 65. Cooling space; 7. Synchronization assembly; 71. Shaft rod; 72. First gear; 73. First rack; 8. First telescopic hose; 9. Second telescopic hose; 10. Check valve. Detailed implementation manners

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] Please refer to Figures 1 to 2As shown in the figure, a pusher device for use before hot rolling includes a conveyor line 1, a heating furnace 2, a pushing component 3, a temperature reduction component 4, and a linkage component 5. The conveyor line 1 is a roller conveyor line in the prior art, including a plurality of rollers 11 arranged at intervals and a motor for driving the rotation of the rollers 11, which is used to convey the billet to a preset position and will not be elaborated here. In this embodiment, a positioning block 12 is fixedly provided at one end of the conveyor line 1, and a buffer component is provided on one side of the positioning block 12. The buffer component includes a baffle 13, and a damper is provided between the baffle 13 and the positioning block 12. The damper can be a hydraulic damper or a spring damper in the prior art, and no limitation is set here. By setting the damper, the kinetic energy of the billet is absorbed, and the inertial impact during the movement of the billet on the conveyor line 1 is converted into a controllable deceleration process, meeting the strict requirements of the automated production line for the position of the billet, and at the same time reducing the impact of the billet on the positioning block 12 and causing damage to the positioning block 12.

[0020] The heating furnace 2 is in the prior art and is fixedly arranged on one side of the conveyor line 1. The heating furnace 2 can heat the billet by means of gas heating, resistance heating, induction heating, etc., and will not be elaborated here. The pushing component 3 is fixedly arranged on the other side of the conveyor line 1. A push plate 6 is fixedly provided at the output end of the pushing component 3 to push the billet on the conveyor line 1 into the heating furnace 2. The pushing component 3 includes a plurality of hydraulic cylinders 31 fixedly arranged at intervals on the other side of the conveyor line 1. The output ends of the plurality of hydraulic cylinders 31 face the feed inlet 21 of the heating furnace 2. One side of the push plate 6 is fixedly connected to the output ends of the plurality of hydraulic cylinders 31 to drive the push plate 6 to push the billet through the expansion and contraction of the plurality of hydraulic cylinders 31.

[0021] Please refer to Figure 1 and Figure 5 As shown in the figure, preferably, a synchronization component 7 for synchronously expanding and contracting the plurality of hydraulic cylinders 31 is fixedly provided on the conveyor line 1. Through the synchronization component 7, it is possible to avoid jamming caused by the asynchronous expansion and contraction of the plurality of hydraulic cylinders 31. Specifically, the synchronization component 7 includes a shaft rod 71 rotatably arranged at the bottom end of the push plate 6, two first gears 72 fixedly sleeved at both ends of the shaft rod 71, and two first racks 73 fixedly arranged on the conveyor line 1. The two first gears 72 are respectively located on both sides of the push plate 6 in the length direction. When the push plate 6 moves towards the heating furnace 2, the two first gears 72 are respectively engaged with the two first racks 73. Thus, through the engagement of the two first gears 72 and the two first racks 73, and in cooperation with the shaft rod 71, the synchronism of the movement states of both ends of the push plate 6 is improved, and further the problem of jamming caused by asynchronous expansion and contraction is avoided.

[0022] The cooling component 4 is fixedly arranged on the other side of the conveyor line 1, that is, the cooling component 4 and the pushing component 3 are on the same side, and is used to cool the pushing component 3. In this embodiment, a receiving space 61 is provided in the push plate 6, and a liquid inlet 62 and a liquid outlet 63 are respectively provided on one side of the receiving space 61. The cooling component 4 includes a box body 41 and at least one coolant pumping component 42. The box body 41 has a hollow structure inside, which is used to store the coolant. A plurality of hydraulic cylinders 31 of the pushing component 3 are fixedly arranged on the top surface of the box body 41. The coolant pumping component 42 is also fixedly arranged on the top surface of the box body 41 and is located on one side of the hydraulic cylinder 31. The input end of the coolant pumping component 42 extends into the box body 41 through a water suction pipe 421 to extract the coolant in the box body 41. The output end of the coolant pumping component 42 is connected to the liquid inlet 62 of the push plate 6 through a first flexible hose 8, and the liquid outlet 63 of the push plate 6 is connected to the inside of the box body 41 through a second flexible hose 9.

[0023] During implementation, the coolant is transported into the push plate 6 through the cooperation of the coolant pumping component 42 and the first flexible hose 8 to exchange heat with the push plate 6. Then, the heat-exchanged coolant flows back into the box body 41 through the second flexible hose 9, thereby completing the heat exchange of the push plate 6, effectively reducing the temperature of the push plate 6, ensuring the strength and service life of the push plate 6, and at the same time avoiding the transfer of high temperature to the hydraulic cylinder 31, which has an adverse impact on the hydraulic cylinder 31, and further improving the reliability and stability of the equipment. It should be noted that a check valve 10 is provided on the water suction pipe 421 to prevent the coolant from flowing from the coolant pumping component 42 into the inside of the box body 41. A check valve 10 is also provided on the first flexible hose 8 to prevent the coolant in the first flexible hose 8 from flowing back into the water pumping cylinder 422. Thus, the coolant can circulate in one direction. In addition, the coolant can be water cooling or cooling oil in the prior art, and no limitation is set here. When the temperature of the coolant in the box body 41 is too high, the box body 41 can also be connected to an external heat dissipation device to dissipate heat from the coolant.

[0024] Please refer to Figure 1 Combined with Figure 4As shown in the figure, in this embodiment, the coolant pumping assembly 42 includes a pumping cylinder 422, a piston 423 and a piston rod 424. The pumping cylinder 422 has a circular cylindrical structure with a hollow interior. The piston 423 is slidably disposed within the pumping cylinder 422. The piston rod 424 is fixedly provided on one side of the piston 423. The end of the piston rod 424 away from the piston 423 passes through the side wall of one end of the pumping cylinder 422 and is fixedly connected to the push plate 6. Both ends of the pumping cylinder 422 are provided with a water inlet 4221 and a water outlet 4222. The two water inlets 4221 serve as the input ends of the cooling component 4 and are respectively connected to the interior of the box body 41 through water suction pipes 421. The two water outlets 4222 are respectively connected to the accommodation space 61 within the push plate 6 through first telescopic hoses 8. A check valve 10 is respectively provided on each first telescopic hose 8 to prevent the coolant within the first telescopic hose 8 from flowing back into the pumping cylinder 422. During implementation, as the pushing assembly 3 drives the push plate 6 to move in a direction away from the heating furnace 2, since one end of the piston rod 424 is fixedly connected to the push plate 6, the piston rod 424 can drive the piston 423 to reciprocate axially along the pumping cylinder 422 as the push plate 6 moves, thereby pumping the coolant in the box body 41 into the pumping cylinder 422.

[0025] For example, please refer to Figure 4 As shown in the figure, the spaces on both axial sides of the piston 423 within the pumping cylinder 422 are defined as a first pumping space 4223 and a second pumping space 4224. When the piston 423 moves in a direction away from the heating furnace 2, the coolant within the box body 41 enters the first pumping space 4223 from the water inlet end of the pumping cylinder 422 near the heating furnace 2. At the same time, as the piston 423 moves, the coolant within the second pumping space 4224 flows through the corresponding first telescopic hose 8 into the push plate 6 to exchange heat with the push plate 6. At this time, the coolant within the push plate 6 can flow back into the box body 41 through the second telescopic hose 9.

[0026] Conversely, when the piston 423 moves in a direction towards the heating furnace 2, the coolant within the box body 41 enters the second pumping space 4224 from the water inlet end of the pumping cylinder 422 away from the heating furnace 2. At the same time, as the piston 423 moves, the coolant within the first pumping space 4223 flows through the corresponding first telescopic hose 8 into the push plate 6 to exchange heat with the push plate 6. Therefore, through the reciprocating movement of the pushing assembly 3, the coolant within the box body 41 can be driven to cool the push plate 6. Thus, it is not necessary to add external equipment (such as a circulation pump) to cool the push plate 6. It should be noted that when the push plate 6 does not need to push the billet, it is located on one side of the conveying line 1 away from the combustion furnace. Therefore, the heat radiated by the combustion furnace has a relatively small impact on the push plate 6 and the pushing assembly 3. Therefore, it is not necessary to continuously circulate the coolant.

[0027] In this embodiment, there are multiple coolant pumping assemblies 42 to enhance the heat exchange efficiency of the coolant with the push plate 6. Preferably, a temporary storage tank 43 is fixedly provided above the coolant pumping assemblies 42. The output end of each coolant pumping assembly 42 is communicated with the temporary storage tank 43 through a water delivery pipe. The temporary storage tank 43 is connected to the liquid inlet 62 of the push plate 6 through a first telescopic hose 8. That is, multiple coolant pumping assemblies 42 uniformly transport the coolant into the temporary storage tank 43, and then the temporary storage tank 43 transports the coolant into the push plate 6. It should be noted that a check valve 10 is provided at one end of the water delivery pipe to prevent the coolant in the temporary storage tank 43 from flowing back into the coolant pumping assembly 42, so that the coolant can only circulate sequentially along the directions of the box body 41, the coolant pumping assembly 42, the push plate 6, and the box body 41. By providing the temporary storage tank 43, the pressure of the coolant in each coolant pumping assembly 42 can be balanced, and at the same time, the coolant in each coolant pumping assembly 42 can be mixed to avoid uneven distribution of the coolant flow rate, resulting in local undercooling or local overcooling of the push plate 6.

[0028] Please refer to Figure 5 As shown, preferably, a plurality of partition plates 64 are provided in the accommodation space 61 of the push plate 6. The plurality of partition plates 64 divide the accommodation space 61 into a plurality of cooling spaces 65. The temporary storage tank 43 is connected to the plurality of cooling spaces 65 through a plurality of first telescopic hoses 8 respectively. Each cooling space 65 is respectively connected to the inside of the box body 41 through a second telescopic hose 9. Thereby, the push plate 6 is further cooled evenly, avoiding local undercooling or local overcooling of the push plate 6.

[0029] Please refer to Figure 6 As shown, in this embodiment, the hydraulic cylinder 31 includes a cylinder block 311 and a telescopic rod 312. A cooling ring 44 is fixedly provided on the top surface of the box body 41 corresponding to each telescopic rod 312. The cooling ring 44 is slidably sleeved on the outside of the corresponding telescopic rod 312. A coolant flow channel (not shown in the figure) is provided inside the cooling ring 44. One end of each second telescopic hose 9 away from the partition plate 64 is connected to the coolant flow channel. One side of the coolant flow channel is connected to the inside of the box body 41 through a return pipe, thereby forming a cooling circuit. By providing direct contact cooling between the cooling ring 44 and the telescopic rod 312, the temperature of the telescopic rod 312 can be reduced, which can reduce the heat transferred to the inside of the hydraulic cylinder 31, and keep the working temperature of the hydraulic oil stable within the range of 40 - 60 °C (the traditional solution is prone to overheating to above 80 °C), avoiding efficiency reduction and component wear caused by oil oxidation and viscosity decrease.

[0030] Please refer to Figure 3As shown in the figure, in this embodiment, a furnace door 22 is vertically slidably arranged outside the feed inlet 21 of the heating furnace 2. The furnace door 22 is a passage for the billet to enter the heating furnace 2, so as to ensure the stable temperature inside the furnace, reduce heat loss, and at the same time avoid the influence of heat on external equipment. One end of the linkage assembly 5 is fixedly connected to the furnace door 22, and the other end is fixedly connected to the cooling assembly 4. A driving part for driving the linkage assembly 5 to open or close the furnace door 22 is arranged on the pushing assembly 3. Thus, the opening and closing of the furnace door 22 are controlled by the driving part fixedly arranged on the pushing assembly 3 in cooperation with the linkage assembly 5.

[0031] Specifically, the linkage assembly 5 includes pulling parts 51 symmetrically arranged on both sides in the length direction of the furnace door 22. Each pulling part 51 includes a pulling rope 511 and a first runner 512 rotatably arranged at the upper part of the heating furnace 2. One end of the pulling rope 511 is fixedly connected to the top end of the furnace door 22, and the other end of the pulling rope 511 bypasses the top end of the first runner 512 and is fixedly connected to the box body 41. The driving part includes a second runner 513 rotatably arranged at the top end of the push plate 6, and the bottom end of the second runner 513 abuts against the pulling rope 511. During implementation, when the furnace door 22 is completely closed outside the feed inlet 21 of the heating furnace 2, at this time, the pulling rope 511 is in an inverted V-shaped tension state. When it is necessary to push the billet into the heating furnace 2, the pushing assembly 3 drives the push plate 6 to move towards the heating furnace 2, and then drives the driving part to move towards the heating furnace 2. During this process, as the driving part moves, the second runner 513 will continuously pull the pulling rope 511 and move downward. Thus, the furnace door 22 is dragged upward by the pulling rope 511 to open the furnace door 22, so that the billet can smoothly enter the heating furnace 2. After the billet is pushed, the pushing assembly 3 drives the push plate 6 and the driving part to reset, and at this time, the furnace door 22 covers the feed inlet 21 of the heating furnace 2 again.

[0032] It should be noted that most of the traditional furnace doors 22 are driven by telescopic cylinders in the prior art, which require additional equipment such as motors and hydraulic stations, and an independent control system is needed, increasing the electrical complexity. However, the present invention uses the driving part arranged on the pushing assembly 3 in cooperation with the linkage assembly 5 to control the opening and closing of the furnace door 22, without the need to add a new driving source, and through the pure mechanical transmission of the pulling rope 511 - runner, avoiding the risk of the telescopic cylinder in the prior art failing due to high temperature.

[0033] In the specific implementation of the present invention, first, a billet is conveyed to a preset position through a plurality of rollers 11 of a conveyor line 1. During this process, by setting positioning blocks 12, the billet can be accurately positioned. At the same time, by setting a buffer assembly, the kinetic energy of the billet can also be absorbed to reduce the impact of the billet on the positioning blocks 12. Then, a plurality of hydraulic cylinders 31 of a pushing assembly 3 are started. The synchronous expansion and contraction of the plurality of hydraulic cylinders 31 drive a push plate 6 to push the billet in the direction of a heating furnace 2. At this time, by rotating a shaft rod 71 arranged at the bottom end of the push plate 6 and two first gears 72 cooperating with two first racks 73, the synchronism of the moving states of both ends of the push plate 6 is improved, thereby avoiding the problem of jamming caused by asynchronous expansion and contraction.

[0034] During this process, through the cooperation of a linkage assembly 5 and a driving part, the opening of a furnace door 22 is realized to smoothly convey the billet into the heating furnace 2. At the same time, during the movement of the push plate 6 in the direction close to the heating furnace 2, a plug rod 424 of a coolant pumping assembly 42 can drive a piston 423 to move axially along a pumping cylinder 422 as the push plate 6 moves. Thereby, the coolant in a box body 41 is pumped into the pumping cylinder 422, and the coolant in the pumping cylinder 422 is conveyed into the push plate 6 to exchange heat with the push plate 6. The heat-exchanged coolant flows through a coolant flow channel arranged inside a cooling ring 44, and then flows back into the box body 41 through the coolant flow channel, thereby avoiding the problems of reduced efficiency and component wear caused by the increase in the temperature of the hydraulic oil in a cylinder block 311. After the billet pushing is completed, the pushing assembly 3 drives the push plate 6 to reset. At this time, through the cooperation of the linkage assembly 5 and the driving part, the closing of the furnace door 22 is realized. At the same time, as the piston 423 resets, the coolant in the box body 41 can be pumped into the push plate 6 and the cooling ring 44 again, thereby performing secondary cooling on the push plate 6 and a telescopic rod 312 of the hydraulic cylinder 31.

[0035] By setting a cooling assembly 4, the present invention cools the push plate 6 and the telescopic rod 312, so that the working temperature of the hydraulic cylinder 31 is stably within the range of 40 - 60 °C, avoiding the problems of reduced efficiency and component wear caused by oil oxidation and viscosity decrease. At the same time, by setting a pumping cylinder 422, a piston 423, and a plug rod 424, during the movement of the plug rod 424 driven by the pushing assembly 3, the coolant in the box body 41 can be driven to cool the push plate 6. Thus, without adding external equipment (such as a circulation pump), the push plate 6 can be cooled; by using the driving part arranged on the pushing assembly 3 to cooperate with the linkage assembly 5 to control the opening and closing of the furnace door 22, no new driving source is required, and through the pure mechanical transmission of a pull rope 511 - a runner, the risk of failure of a telescopic cylinder in the prior art due to high temperature is avoided; by rotating a shaft rod 71 arranged at the bottom end of the push plate 6 and two first gears 72 cooperating with two first racks 73, the synchronism of the moving states of both ends of the push plate 6 is improved, thereby avoiding the problem of jamming caused by asynchronous expansion and contraction.

[0036] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A pusher device for use before hot rolling, characterized in that, Including: A conveyor line (1) for conveying billets; A heating furnace (2) fixedly arranged on one side of the conveyor line (1) for heating the billets. A feed inlet (21) is provided on the side of the heating furnace (2) close to the conveyor line (1), and a furnace door (22) is vertically slidably arranged outside the feed inlet (21); A pushing component (3) fixedly arranged on the other side of the conveyor line (1) for pushing the billets on the conveyor line (1) into the heating furnace (2). A push plate (6) is fixedly arranged at the output end of the pushing component (3); A cooling component (4) fixedly arranged on the other side of the conveyor line (1) for cooling the pushing component (3); A linkage component (5) with one end fixedly connected to the furnace door (22) and the other end fixedly connected to the cooling component (4). A driving part for driving the linkage component (5) to open or close the furnace door (22) is arranged on the pushing component (3).

2. The pusher device for use before hot rolling according to claim 1, wherein A receiving space (61) is arranged inside the push plate (6). A liquid inlet (62) and a liquid outlet (63) are respectively arranged on one side of the receiving space (61). The cooling component (4) includes a box body (41) for storing coolant. The pushing component (3) is fixedly arranged on the top surface of the box body (41). At least one coolant pumping and conveying component (42) is fixedly arranged on the top surface of the box body (41). The input end of the coolant pumping and conveying component (42) extends into the box body (41) through a water suction pipe (421) for pumping the coolant in the box body (41). The output end of the coolant pumping and conveying component (42) is connected to the liquid inlet (62) through a first telescopic hose (8). The liquid outlet (63) is connected to the inside of the box body (41) through a second telescopic hose (9). A check valve (10) is arranged on the water suction pipe (421) for preventing the coolant from flowing from the coolant pumping and conveying component (42) into the inside of the box body (41).

3. The pusher device for use before hot rolling according to claim 2, wherein, The coolant pumping and conveying component (42) includes a hollow water pumping cylinder (422), a piston (423) slidably arranged inside the water pumping cylinder (422), and a piston rod (424) fixedly arranged on one side of the piston (423). One end of the piston rod (424) passes through one end of the water pumping cylinder (422) and is fixedly connected to the push plate (6). Water inlets (4221) and water outlets (4222) are arranged at both ends of the water pumping cylinder (422). The two water inlets (4221) serve as the input ends of the cooling component (4) and are respectively connected to the inside of the box body (41) through water suction pipes (421). The two water outlets (4222) are respectively connected to the receiving space (61) inside the push plate (6) through first telescopic hoses (8). A check valve (10) is respectively arranged on each first telescopic hose (8) for preventing the coolant in the first telescopic hose (8) from flowing back into the water pumping cylinder (422).

4. The pusher device for use before hot rolling according to claim 2, wherein, There are multiple coolant pumping assemblies (42). A temporary storage tank (43) is fixedly provided above the coolant pumping assemblies (42). The output end of each coolant pumping assembly (42) is communicated with the temporary storage tank (43) through a water delivery pipe. The temporary storage tank (43) is communicated with the liquid inlet (62) through a first telescopic hose (8). A check valve (10) is provided at one end of the water delivery pipe to prevent the coolant in the temporary storage tank (43) from flowing back into the coolant pumping assembly (42).

5. The pusher device for use before hot rolling according to claim 4, wherein A plurality of partition plates (64) are provided in the accommodation space (61) of the push plate (6). The plurality of partition plates (64) divide the accommodation space (61) into a plurality of cooling spaces (65). The temporary storage tank (43) is communicated with the plurality of cooling spaces (65) respectively through a plurality of first telescopic hoses (8). Each cooling space (65) is communicated with the inside of the box body (41) through a second telescopic hose (9).

6. The pusher device for use before hot rolling according to claim 5, characterized in that, The pushing assembly (3) includes a plurality of hydraulic cylinders (31) fixedly provided at intervals on the other side of the conveyor line (1). The output ends of the plurality of hydraulic cylinders (31) face the feeding port (21) of the heating furnace (2). The hydraulic cylinder (31) includes a cylinder body (311) and a telescopic rod (312). A cooling ring (44) is fixedly provided on the top surface of the box body (41) corresponding to each telescopic rod (312). The cooling ring (44) is slidably sleeved on the outer side of the corresponding telescopic rod (312). A coolant flow channel is provided inside the cooling ring (44). One end of each second telescopic hose (9) away from the partition plate (64) is communicated with the coolant flow channel. One side of the coolant flow channel is communicated with the inside of the box body (41) through a return pipe.

7. The pusher device for use before hot rolling according to claim 1, characterized in that, The linkage assembly (5) includes pulling parts (51) symmetrically arranged on both sides in the length direction of the furnace door (22). Each pulling part (51) includes a pulling rope (511) and a first runner (512) rotatably arranged on the upper part of the heating furnace (2). One end of the pulling rope (511) is fixedly connected to the top end of the furnace door (22). The other end of the pulling rope (511) bypasses the top end of the first runner (512) and is fixedly connected to the cooling assembly (4). The driving part includes a second runner (513) rotatably arranged on the top end of the push plate (6). The bottom end of the second runner (513) abuts against the pulling rope (511).

8. The pusher device for use before hot rolling according to claim 1, characterized in that, A synchronization assembly (7) for synchronously expanding and contracting the plurality of hydraulic cylinders (31) is fixedly provided on the conveyor line (1).

9. The pusher device for use before hot rolling according to claim 8, characterized in that, The synchronization assembly (7) includes a shaft rod (71) rotatably arranged at the bottom end of the push plate (6), two first gears (72) fixedly sleeved at both ends of the shaft rod (71), and two first racks (73) fixedly provided on the conveyor line (1). The axial direction of the shaft rod (71) is parallel to the length direction of the furnace door (22). When the push plate (6) moves towards the heating furnace (2), the two first gears (72) are respectively engaged with the two first racks (73).

10. The pusher device for use before hot rolling according to claim 1, wherein The conveyor line (1) includes a plurality of rollers (11) arranged at intervals for conveying the billet to the front of the feed inlet (21). One end of the conveyor line (1) is fixedly provided with a positioning block (12), and a buffer assembly is arranged on one side of the positioning block (12). The buffer assembly includes a baffle (13), and a damper is arranged between the baffle (13) and the positioning block (12).

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