Emergency device for inner sleeve of coke oven charging car

Abstract

The present application relates to a kind of coke oven coal charging car inner sleeve emergency device;Including counterweight box;The counterweight box is internally provided with storage groove, the top of the counterweight box is fixedly connected with rotating plate, the end of the rotating plate away from counterweight box is fixedly connected with inner sleeve main body, the top of the rotating plate is fixedly connected with fixed block, the inside of the fixed block is rotatably connected with support rod;The present application is driven by the weight of counterweight box, one end of rotating plate is pressed down, so that the fixed block on the top of rotating plate is operated along the outside rotating structure of support rod, compared with the fixed structure of the past telescopic rod and inner sleeve main body, it needs two operators to operate in linkage, it is easy to cause operation error, cannot effectively and quickly separate coal charging inner sleeve and furnace mouth in first time, affect safety, the effect of lever principle is realized to reset extrusion oil by this structure, reduce the problem of error operation, improve operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of coke oven technology, and in particular to an emergency device for the inner sleeve of a coke oven coal charging car. Background Technology

[0002] A coke oven is a furnace typically constructed of refractory bricks and blocks, used to convert coal into coke. It is the main thermal equipment for coking, and a type of kiln that produces coke from coal. A modern coke oven is a horizontal coke oven primarily used for producing metallurgical coke and capable of recovering coking chemical products. It consists of a furnace body and auxiliary equipment. The furnace body comprises a roof, combustion chamber, carbonization chamber, inclined flue, and regenerator, connected by flues and a chimney. The entire coke oven is built on a concrete foundation. While the basic structure of modern coke ovens is largely the same, they can be further categorized into many types due to differences in coal charging methods, heating methods, and the fuels used.

[0003] The existing coke oven coal charging car is equipped with an emergency device. In the event of a power outage, an accumulator is installed. After a power outage, the accumulator can be activated by an operator, and another operator can open the hydraulic valve to allow the liquid inside the cylinder to be discharged through the hydraulic oil transmission pipeline.

[0004] In the existing technology, the existing emergency device for the inner sleeve of the coke oven charging car is equipped with an accumulator, which can provide emergency response after a power outage. However, it requires two people to operate and is prone to operational errors in emergency situations. It cannot effectively and quickly detach the inner sleeve of the charging car from the oven opening in the first instance, which affects safety. Therefore, in order to address the above problems, an emergency device for the inner sleeve of the coke oven charging car is proposed. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention provides an emergency device for the inner sleeve of a coke oven charging car. In one embodiment of the present invention, it includes a counterweight box; the counterweight box has a storage slot inside; a rotating plate is fixedly connected to the top of the counterweight box; an inner sleeve body is fixedly connected to the end of the rotating plate away from the counterweight box; a fixing block is fixedly connected to the top of the rotating plate; a support rod is rotatably connected inside the fixing block; a support plate is fixedly connected to one end of the support rod; and a limit stop is fixedly connected to the end of the support rod away from the support plate. A rotating shaft is fixedly connected to the top of the rotating plate, and a telescopic rod is provided between the rotating support blocks. A rotating shaft is rotatably connected between the rotating support blocks and the telescopic rod. A hydraulic cylinder body is provided at the top of the telescopic rod, and a No. 1 flow pipe is fixedly connected to one side of the hydraulic cylinder body. A hydraulic valve is provided outside the No. 1 flow pipe, and a return oil pipe is fixedly connected to one side of the hydraulic valve. A hydraulic oil tank is fixedly connected to the top of the return oil pipe. Compared with the previous method of fixing the telescopic rod to the inner sleeve body, which required two operators to operate in conjunction, this structure can easily lead to operational errors and prevent the coal charging inner sleeve from being effectively and quickly separated from the furnace opening in a timely manner, affecting safety. This structure achieves the effect of lever principle to push the reset and squeeze the return oil, reducing the problem of operational errors and improving operating efficiency.

[0007] In one embodiment of the present invention, a tenon and mortise groove is provided on one side of the counterweight box. Multiple sets of tenon and mortise grooves are arranged in a linear array on one side of the counterweight box. A tenon and mortise block is slidably connected inside the tenon and mortise groove. A door panel is fixedly connected to the side of the tenon and mortise block away from the counterweight box. A handle is fixedly connected to the side of the door panel away from the counterweight box. With this structure, the counterweight box can be opened and closed more effectively to store the counterweight blocks inside the counterweight box. This solves the problem of the counterweight blocks falling off due to the downward displacement of the counterweight box and improves the stability during operation.

[0008] In one embodiment of the present invention, a discharge port is fixedly connected to the bottom of the inner sleeve body. The discharge port has a conical design structure, which improves the storage and transmission effect and avoids the problem of coal blocks getting stuck inside the inner sleeve body, thus improving the transmission effect.

[0009] In one embodiment of the present invention, a fixing block is fixedly connected to one side of the cylinder body, and the side of the fixing block away from the cylinder body is fixedly connected to one side of the support plate. This structure provides a better fixing effect, solves the problem of fixing the cylinder body, and improves the stability during operation.

[0010] In one embodiment of the present invention, a second flow pipe is fixedly connected below the first flow pipe. The first and second flow pipes are hollow inside. This structure provides better backup return flow and improves the return flow effect during power failure.

[0011] In one embodiment of the present invention, a manual valve assembly is provided inside the second flow pipe. The valve assembly is used for emergency switching. The manual valve assembly inside the second flow pipe can effectively control the backflow of hydraulic oil, thereby improving the stability of control.

[0012] In one embodiment of the present invention, the valve assembly includes a spherical block disposed inside a second flow pipe. A flow hole is formed inside the spherical block. A rotating rod is fixedly connected to one side of the spherical block and rotates through the second flow pipe on one side. An operating handle is fixedly connected to the side of the rotating rod away from the spherical block. This structure provides a better sealing and switching effect, solves the problem that unidirectional hydraulic oil cannot control the flow and sealing effect, and improves the flow speed of hydraulic oil during flow.

[0013] In one embodiment of the present invention, the second flow pipe is designed in an "L" shape, and the end of the second flow pipe away from the first flow pipe is fixedly connected to the side of the return oil pipe, and the flow of hydraulic oil is controlled through the return oil pipe.

[0014] In one embodiment of the present invention, the return oil pipe is hollow inside, and the second flow pipe is connected to the return oil pipe. This structure provides better control of the backflow and prevents long-term damage to the hydraulic oil tank caused by large impact forces.

[0015] In one embodiment of the present invention, a second fixing block is fixedly connected to one side of the hydraulic oil tank, and the side of the second fixing block away from the hydraulic oil tank is fixedly connected to one side of the support plate. This structure provides better support and fixation.

[0016] The technical solution of the present invention has the following advantages compared with the prior art: 1. This invention uses the weight of the counterweight box to press one end of the rotating plate downwards, causing the fixed block at the top of the rotating plate to rotate along the external structure of the support rod. Compared to the previous method of fixing the telescopic rod to the inner sleeve body, which required two operators to work together and was prone to operational errors, making it difficult to effectively and quickly detach the coal charging inner sleeve from the furnace opening and affecting safety, this structure achieves the effect of lever principle to push it to reset and squeeze back the oil, reducing the problem of operational errors and improving operational efficiency.

[0017] 2. This invention utilizes a handle fixed to the side of the door panel away from the tenon block for better door panel sliding operation. This structure allows for better storage of the counterweight blocks inside the counterweight box, solving the problem of counterweight blocks falling off due to downward displacement of the counterweight box and improving stability during operation.

[0018] 3. The present invention can effectively transfer coal blocks inside the inner sleeve body 16 into the furnace mouth for collection through the conical discharge port 19 at the bottom of the inner sleeve body 16. This structure provides better collection and transfer, and avoids the problem of coal blocks getting stuck inside the inner sleeve body 16, thus improving the transfer efficiency.

[0019] 4. The present invention can effectively support the cylinder body 15 on one side of the support plate 11 through the first fixing block 17. This structure provides a better fixing effect, solves the problem of fixing the cylinder body 15, and improves the stability during operation.

[0020] 5. The present invention can transmit hydraulic oil back when the hydraulic valve 20 is blocked and cannot be opened by the second flow pipe 21 below the first flow pipe 18. This structure provides better backup backflow effect and improves the backflow effect when power is off.

[0021] 6. In order to prevent hydraulic oil from flowing out of the second flow pipe 21 when the hydraulic valve 20 is sealed, thereby making it impossible to control its return efficiency, the present invention can effectively control the return effect of the hydraulic oil by means of a manual valve assembly set inside the second flow pipe 21, thus improving the stability of the control.

[0022] 7. The present invention can better organize the flow of hydraulic oil through the spherical structure of the ball valve. During operation, the rotation of the handle 25 can drive the rotating rod 24 to rotate, so that the spherical block 22 can seal and flow through the flow hole 23. This structure has a better sealing and switching effect, solves the problem that the flow sealing effect of unidirectional hydraulic oil cannot be controlled, and improves the flow speed of hydraulic oil.

[0023] 8. The present invention can effectively connect and fix the hydraulic oil tank 27 to the support plate 11 by means of the second fixing block 28 on one side of the hydraulic oil tank 27. The support and fixation effect is better by means of this structure. Attached Figure Description

[0024] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the main body of the present invention; Figure 3 This is a structural diagram of the counterweight box of the present invention; Figure 4 This is a cross-sectional structural diagram of the No. 2 flow tube of the present invention; Figure 5 This is a partially enlarged cross-sectional view of the No. 2 flow tube of the present invention; Figure 6 This is a cross-sectional structural diagram of the support plate of the present invention. Figure 7 This is the invention Figure 6 Enlarged structural diagram at point A in the middle.

[0026] Instruction manual drawing reference numerals: 1. Counterweight box; 2. Tenon and mortise block; 4. Door panel; 5. Handle; 6. Storage slot; 7. Rotating plate; 8. Fixing block; 9. Support rod; 10. Limiting block; 11. Support plate; 12. Rotating support block; 13. Rotating shaft; 14. Telescopic rod; 15. Cylinder body; 16. Inner sleeve body; 17. Fixing block No. 1; 18. Flow pipe No. 1; 19. Discharge port; 20. Hydraulic valve; 21. Flow pipe No. 2; 22. Spherical block; 23. Flow hole; 24. Rotating rod; 25. Operating handle; 26. Return oil pipe; 27. Hydraulic oil tank; 28. Fixing block No. 2. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0028] Please see Figures 1-7 As shown, an emergency device for the inner sleeve of a coke oven charging car includes a counterweight box 1; the counterweight box 1 has a storage slot 6 inside; a rotating plate 7 is fixedly connected to the top of the counterweight box 1; an inner sleeve body 16 is fixedly connected to the end of the rotating plate 7 away from the counterweight box 1; a fixing block 8 is fixedly connected to the top of the rotating plate 7; a support rod 9 is rotatably connected inside the fixing block 8; a support plate 11 is fixedly connected to one end of the support rod 9; and a limit stop 10 is fixedly connected to the end of the support rod 9 away from the support plate 11. A rotating shaft 13 is fixedly connected to the top of the rotating plate 7. A telescopic rod 14 is provided between the rotating support blocks 12. The rotating support blocks 12 and the telescopic rod 14 are rotatably connected by the rotating shaft 13. A cylinder body 15 is provided at the top of the telescopic rod 14. A first flow pipe 18 is fixedly connected to one side of the cylinder body 15. A hydraulic valve 20 is provided outside the first flow pipe 18. A return oil pipe 26 is fixedly connected to one side of the hydraulic valve 20. A hydraulic oil tank 27 is fixedly connected to the top of the return oil pipe 26.

[0029] In the event of a circuit trip during operation, a counterweight can be added to the storage slot 6 inside the counterweight box 1. The weight of the counterweight box 1 will cause one end of the rotating plate 7 to press downwards, causing the fixing block 8 at the top of the rotating plate 7 to rotate along the outside of the support rod 9. To prevent the fixing block 8 from falling off the support rod 9, a limit stop 10 is provided. When the rotating plate 7 presses upwards away from the counterweight box 1, it will cause the rotating support block 12 to rotate by the rotating shaft, pushing the telescopic rod 14 into the cylinder body 15. The hydraulic oil inside the cylinder body 15 is then forced into the first flow pipe 18. The oil flows through the No. 1 flow pipe 18 into the return oil pipe 26 and then back into the hydraulic oil tank 27, allowing the inner sleeve body 16 to detach from the furnace opening. This prevents the inner sleeve body 16 from being damaged by heat. The hydraulic valve 20 can control the backflow. Compared with the previous telescopic rod 14 fixed to the inner sleeve body 16, which required two operators to work together and was prone to operational errors, this structure achieves the effect of lever principle to push it back and squeeze the oil back, reducing the problem of operational errors and improving operating efficiency.

[0030] Furthermore, such as Figure 2 and Figure 3 As shown, a tenon and mortise groove is provided on one side of the counterweight box 1. Multiple sets of tenon and mortise grooves are arranged in a linear array on one side of the counterweight box 1. A tenon and mortise block 2 is slidably connected inside the tenon and mortise groove. A door panel 4 is fixedly connected to the side of the tenon and mortise block 2 away from the counterweight box 1. A handle 5 is fixedly connected to the side of the door panel 4 away from the counterweight box 1.

[0031] During operation, the tenon and mortise groove of the counterweight box 1 can better fit with the tenon and mortise block 2. When fixed, the door panel 4 can act as a barrier to prevent the counterweight block from falling out of the storage slot 6 inside the counterweight box 1. The handle 5 fixed on the side of the door panel 4 away from the tenon and mortise block 2 allows for better operation and sliding of the door panel 4. Through this structure, the counterweight box 1 can be opened and closed more effectively, which can better store the counterweight block inside the counterweight box 1. This solves the problem of the counterweight block falling off due to the downward displacement of the counterweight box 1 and improves the stability when pressing down during operation.

[0032] Furthermore, such as Figure 1 and Figure 2 As shown, the bottom of the inner sleeve body 16 is fixedly connected to a discharge port 19, which has a conical design structure.

[0033] During operation, the conical discharge port 19 at the bottom of the inner sleeve body 16 can effectively transfer the coal inside the inner sleeve body 16 into the furnace mouth for collection. This structure provides better collection and transfer, preventing the coal from getting stuck inside the inner sleeve body 16 and thus improving the transfer efficiency.

[0034] Furthermore, such as Figure 1 and Figure 2 As shown, a fixing block 17 is fixedly connected to one side of the cylinder body 15, and the side of the fixing block 17 away from the cylinder body 15 is fixedly connected to one side of the support plate 11.

[0035] During operation, the first fixing block 17 can effectively support the cylinder body 15 on one side of the support plate 11. This structure provides better fixation, solves the problem of fixing the cylinder body 15, and improves the stability during operation.

[0036] Furthermore, such as Figure 1 and Figure 2 As shown, a second flow tube 21 is fixedly connected below the first flow tube 18, and the interiors of the first flow tube 18 and the second flow tube 21 are hollow.

[0037] During operation, the No. 2 flow pipe 21 below the No. 1 flow pipe 18 can transmit hydraulic oil back when the hydraulic valve 20 is blocked and cannot be opened. This structure provides better backup backflow and improves the backflow effect during power failure.

[0038] Furthermore, such as Figure 4 and Figure 5 As shown, a manual valve assembly is installed inside the second flow pipe 21, which is used for emergency switching.

[0039] During operation, when the hydraulic valve 20 is sealed, in order to prevent hydraulic oil from flowing out of the second flow pipe 21 and thus making it impossible to control its return efficiency, the manual valve assembly set inside the second flow pipe 21 can effectively control the return effect of the hydraulic oil, thereby improving the stability of the control.

[0040] Furthermore, such as Figure 4 and Figure 5 As shown, the valve assembly includes a spherical block 22, which is disposed inside the second flow pipe 21. A flow hole 23 is provided inside the spherical block 22. A rotating rod 24 is fixedly connected to one side of the spherical block 22. The rotating rod 24 passes through the second flow pipe 21 and rotates on one side. An operating handle 25 is fixedly connected to the side of the rotating rod 24 away from the spherical block 22.

[0041] During operation, the spherical structure of the ball valve can better organize the flow of hydraulic oil. When operating, the rotation of the handle 25 can drive the rotating rod 24 to rotate, allowing the spherical block 22 to seal and the flow through the flow hole 23 to flow. This structure provides a better sealing and switching effect, solving the problem that the flow sealing effect of unidirectional hydraulic oil cannot be controlled, and improving the flow speed of hydraulic oil.

[0042] Furthermore, such as Figure 1 and Figure 2 As shown, the second flow pipe 21 has an "L" shape design, and the end of the second flow pipe 21 away from the first flow pipe 18 is fixedly connected to the side of the return oil pipe 26.

[0043] During operation, the connection design of the No. 2 flow pipe 21 allows the liquid to be first transferred into the return oil pipe 26 during the return flow, and then the flow of hydraulic oil is controlled through the return oil pipe 26.

[0044] Furthermore, such as Figure 4 and Figure 5 As shown, the return oil pipe 26 has a hollow interior, and the second flow pipe 21 is connected to the return oil pipe 26.

[0045] During operation, the hollow structure inside the return oil pipe 26 allows the second flow pipe 21 to be connected to the return oil pipe 26, which prevents the problem of excessively high return efficiency leading to poor control of the oil output of the hydraulic oil tank 27. This structure provides better control of the return flow and avoids long-term damage to the hydraulic oil tank 27 caused by large impact forces.

[0046] Furthermore, such as Figure 1 and Figure 2 As shown, a second fixing block 28 is fixedly connected to one side of the hydraulic oil tank 27, and the side of the second fixing block 28 away from the hydraulic oil tank 27 is fixedly connected to one side of the support plate 11.

[0047] During operation, the No. 2 fixing block 28 on one side of the hydraulic oil tank 27 can be well connected and fixed to support the hydraulic oil tank 27 on one side of the support plate 11. This structure provides better support and fixation.

[0048] Working principle: If a circuit trip occurs during use, a counterweight can be added to the storage slot 6 inside the counterweight box 1. The weight of the counterweight box 1 will cause one end of the rotating plate 7 to press down, causing the fixing block 8 at the top of the rotating plate 7 to rotate along the outside of the support rod 9. To prevent the fixing block 8 from falling off the support rod 9, a limit stop 10 is set to block it. When the rotating plate 7 presses upward away from the side of the counterweight box 1, it will cause the rotating support block 12 to rotate by the rotating shaft, pushing the telescopic rod 14 to compress into the cylinder body 15. The hydraulic oil inside the cylinder body 15 is squeezed into the first flow pipe 18, and then flows back into the return oil pipe 26 through the first flow pipe 18 and then back into the hydraulic oil tank 27, causing the inner sleeve body 16 to detach from the furnace. To prevent the inner sleeve body 16 from being damaged by heat, the hydraulic valve 20 can control the backflow. Compared with the previous telescopic rod 14 fixed to the inner sleeve body 16, which required two operators to operate in conjunction, making it easy to make mistakes and not be able to effectively and quickly detach the coal charging inner sleeve from the furnace opening, affecting safety, this structure realizes the effect of lever principle to push it to reset and squeeze back oil, reducing the problem of operational errors and improving operating efficiency. The tenon and mortise groove of the counterweight box 1 can better fit with the tenon and mortise block 2. When fixed, the door panel 4 can block to prevent the counterweight block from falling out of the storage slot 6 inside the counterweight box 1. The handle 5 fixed on the side of the door panel 4 away from the tenon and mortise block 2 is for better operation. The sliding door panel 4 allows for better storage of the counterweight blocks inside the counterweight box 1 during opening and closing. This solves the problem of counterweight blocks falling off due to downward displacement of the counterweight box 1, improving stability during operation. The conical discharge port 19 at the bottom of the inner sleeve body 16 effectively transfers coal blocks inside the inner sleeve body 16 into the furnace opening for collection. This structure provides better storage and transfer, preventing coal blocks from getting stuck inside the inner sleeve body 16 and improving the transfer efficiency. The first fixing block 17 effectively supports the cylinder body 15 on one side of the support plate 11. This structure provides better fixation, solving the problem of fixing the cylinder body 15 and improving operational stability. Qualitatively, the second flow pipe 21 below the first flow pipe 18 can transmit hydraulic oil back when the hydraulic valve 20 is blocked and cannot be opened. This structure provides better backup backflow and improves the backflow effect during power failure. When the hydraulic valve 20 is sealed, to prevent hydraulic oil from flowing out of the second flow pipe 21 and thus affecting its backflow efficiency, a manual valve assembly inside the second flow pipe 21 can effectively control the hydraulic oil backflow, improving the stability of control. The spherical structure of the ball valve can better organize the flow of hydraulic oil. During operation, rotating the handle 25 will drive the rotating rod 24 to rotate, allowing the spherical block 22 to seal and allowing flow through the flow hole 23.This structure provides a better sealing and sealing effect, solving the problem of uncontrollable flow sealing in unidirectional hydraulic oil. It also improves the flow rate of the hydraulic oil. The interconnected design of the second flow pipe 21 allows the liquid to first enter the return pipe 26 during backflow, and then the hydraulic oil flow is controlled through the return pipe 26. The hollow structure inside the return pipe 26 allows the second flow pipe 21 to connect with the return pipe 26, preventing excessively high backflow efficiency that could lead to poor control of the hydraulic oil tank 27. This structure provides better backflow control and prevents long-term damage to the hydraulic oil tank 27 from significant impact. The second fixing block 28 on one side of the hydraulic oil tank 27 effectively connects and supports the hydraulic oil tank 27 to the support plate 11, providing better support and fixation.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An emergency device for the inner sleeve of a coke oven coal charging car, characterized in that: Includes a counterweight box (1); the counterweight box (1) has a storage slot (6) inside, a rotating plate (7) is fixedly connected to the top of the counterweight box (1), an inner sleeve body (16) is fixedly connected to the end of the rotating plate (7) away from the counterweight box (1), a fixing block (8) is fixedly connected to the top of the rotating plate (7), a support rod (9) is rotatably connected inside the fixing block (8), a support plate (11) is fixedly connected to one end of the support rod (9), and a limit stop (10) is fixedly connected to the end of the support rod (9) away from the support plate (11). A rotating support block (12) is fixedly connected to the top of the rotating plate (7). A telescopic rod (14) is provided between the rotating support blocks (12). A rotating shaft (13) is rotatably connected between the rotating support block (12) and the telescopic rod (14). A cylinder body (15) is provided at the top of the telescopic rod (14). A first flow pipe (18) is fixedly connected to one side of the cylinder body (15). A hydraulic valve (20) is provided outside the first flow pipe (18). A return oil pipe (26) is fixedly connected to one side of the hydraulic valve (20). A hydraulic oil tank (27) is fixedly connected to the top of the return oil pipe (26). The counterweight box (1) has a tenon and mortise groove on one side. There are multiple sets of tenon and mortise grooves arranged in a linear array on one side of the counterweight box (1). Tenon and mortise blocks (2) are slidably connected inside the tenon and mortise grooves. A door panel (4) is fixedly connected to the side of the tenon and mortise block (2) away from the counterweight box (1). A handle (5) is fixedly connected to the side of the door panel (4) away from the counterweight box (1). A second flow tube (21) is fixedly connected below the first flow tube (18), and the interiors of the first flow tube (18) and the second flow tube (21) are hollow. The second flow pipe (21) is equipped with a manual valve assembly, which is used for emergency switching; The valve assembly includes a spherical block (22) disposed inside the second flow pipe (21). A flow hole (23) is provided inside the spherical block (22). A rotating rod (24) is fixedly connected to one side of the spherical block (22). The rotating rod (24) passes through the second flow pipe (21) and rotates on one side. An operating handle (25) is fixedly connected to the side of the rotating rod (24) away from the spherical block (22). The second flow pipe (21) is designed in an "L" shape, and the end of the second flow pipe (21) away from the first flow pipe (18) is fixedly connected to the side of the return oil pipe (26); The return oil pipe (26) has a hollow interior, and the second flow pipe (21) is connected to the return oil pipe (26). The bottom of the inner sleeve body (16) is fixedly connected to a discharge port (19), which is a conical design structure; A fixing block (17) is fixedly connected to one side of the cylinder body (15), and the fixing block (17) is fixedly connected to one side of the support plate (11) on the side away from the cylinder body (15). A second fixing block (28) is fixedly connected to one side of the hydraulic oil tank (27), and the side of the second fixing block (28) away from the hydraulic oil tank (27) is fixedly connected to one side of the support plate (11). When a power outage occurs, the operator places the counterweight into the storage slot (6) of the counterweight box (1). The counterweight box (1) moves downward due to its own weight, causing the rotating plate (7) to press down at one end connected to the counterweight box. The end of the rotating plate (7) away from the counterweight box tilts upward, and the fixed block (8) rotates along the outside of the support rod (9). At the same time, the rotating support block (12) rotates by the rotating shaft (13), pushing the telescopic rod (14) to compress into the cylinder body (15), squeezing out the hydraulic oil inside the cylinder, thereby realizing the upward disengagement of the inner sleeve body (16).

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