Device for dismounting and mounting the connecting screw of the coke oven door cross iron and the coke oven door body

Abstract

The utility model discloses a kind of dismounting devices of coke oven door cross iron and furnace door body steel structure connecting screw.The bottom of coke oven door cross iron is connected with backing plate, backing plate is equipped with mounting hole, and cylindrical cavity is fixedly arranged on furnace door body, and the top periphery of cylindrical cavity is equipped with matched thread hole;Coke oven door cross iron is detachably connected with furnace door body by spring and screw;Dismounting device includes the threaded rod of being set at the both sides of coke oven door cross iron, and threaded rod is inserted into thread hole after passing through mounting hole;The upper end of threaded rod is equipped with locating block, and locating block insertion hole is opened at both ends of locating block;The upper side of locating block insertion hole, threaded rod is equipped with adjusting nut;Locating block is equipped with jack between coke oven door cross iron.The utility model is through "rigid frame bearing spring stress+jack accurate position adjustment", realized "single-person operation, stress-free dismounting", solve the problem of time-consuming and laborious of traditional dismounting mode of coke oven door cross iron and furnace door body steel structure connecting screw.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts disassembly and installation technology, and in particular to an auxiliary device for disassembling and installing the connecting screws between the cross iron of the coke oven door and the steel structure of the door body. Background Technology

[0002] The coke oven door is a key sealing device on both sides of the coke oven carbonization chamber. Its core function is to open during coke pushing and close tightly during coking, creating the necessary air-isolated and high-temperature sealed environment for the high-temperature dry distillation of coal into coke. As an important component of the steel structure of the coke oven door, the crossbar needs to be disassembled and maintained regularly during major overhauls of the door to ensure its sealing performance and service life.

[0003] In existing technologies, the connection between the horizontal iron and the furnace door steel structure is usually equipped with a spring. This spring provides the necessary elastic pressure for sealing the furnace door, but it also brings significant challenges to the installation and disassembly of the horizontal iron. Due to the large stress on the spring, multiple operators need to work together and use external auxiliary tools to balance the spring force when disassembling and assembling the screws connecting the horizontal iron and the main steel structure, in order to prevent parts from flying off and causing injury.

[0004] This traditional disassembly and assembly method has many drawbacks: First, it is cumbersome to operate, requires multiple people to work together and relies on additional tools, resulting in high labor intensity and long time consumption; second, it poses high safety risks, as the spring stress is difficult to control precisely, which can easily lead to parts slipping or flying off, causing injury to operators; third, it has low operating efficiency and cannot meet the needs of rapid maintenance of coke oven equipment and ensuring continuous production. Summary of the Invention

[0005] This utility model provides a disassembly and assembly device for the connecting screws between the horizontal iron of the coke oven door and the steel structure of the door body. The device achieves "single-person operation and stress-free disassembly and assembly" by "rigid frame bearing spring stress + jack for precise position adjustment", which solves the problem of time-consuming and labor-intensive disassembly and assembly of the connecting screws between the horizontal iron of the coke oven door and the steel structure of the door body.

[0006] To solve the above problems, the technical solution adopted by this utility model is: The bottom of the coke oven door crossbar is connected to a pad, and the pad has mounting holes around its perimeter. A cylindrical cavity is fixedly installed on the door body, and a threaded hole that matches the mounting hole is opened on the top periphery of the cylindrical cavity. The coke oven door crossbar is detachably connected to the door body by a spring and a screw that passes through the mounting hole and is inserted into the threaded hole. The disassembly and assembly device includes threaded rods on both sides of the horizontal iron of the coke oven door. The threaded rods pass through the mounting holes and are inserted into the threaded holes. The upper end of the threaded rod is provided with a positioning block, and the two ends of the positioning block are provided with positioning block insertion holes for the threaded rod to pass through. Above the positioning block insertion holes, the threaded rod is fitted with an adjusting nut. A jack is provided between the positioning block and the horizontal iron of the coke oven door.

[0007] A more specific technical solution in the above technical solution may be: the cylindrical cavity is provided with an inner groove, a support column is installed in the inner groove, the spring is sleeved on the outside of the support column, and a pressure plate is provided between the support column and the pad; the top of the support column is fixedly connected to the bottom of the pressure plate.

[0008] Furthermore, a force-bearing block is provided at the top of the threaded rod.

[0009] Furthermore, the force-bearing block is provided with a lever insertion hole for inserting a lever.

[0010] Furthermore, the threaded rods are distributed diagonally on both sides of the horizontal iron of the coke oven door.

[0011] Furthermore, there is a gap between the outer wall of the threaded rod and the inner wall of the mounting hole.

[0012] Furthermore, the two threaded rods have the same thread direction.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. This utility model solves the problem of time-consuming and labor-intensive traditional disassembly and assembly of the connecting screws between the cross iron of the coke oven door and the steel structure of the oven door body by using a "rigid frame bearing spring stress + jack for precise position adjustment". Specifically, the rigid support frame is composed of "positioning block + threaded rod + adjusting nut + cylindrical cavity" and the position is precisely adjusted by jack. No multiple people are required to balance the stress. A single person can complete the disassembly and assembly work independently, which greatly reduces the labor intensity of the operator and eliminates the reliance on a variety of additional auxiliary tools, and the operation process is significantly simplified.

[0014] 2. This utility model, through a rigid structure optimization design, completely constrains the spring within the cylindrical cavity, with the support column housing the spring and the pressure plate pressing on top of the spring. This transforms the elastic stress of the spring into the rigid support force of the frame, thus offsetting the stress interference of the spring on the screw and completely avoiding the risk of the spring-driven components flying off or slipping during disassembly and assembly. It fundamentally solves the safety hazard of easy injury to operators in traditional operations, building a solid safety line for maintenance operations.

[0015] 3. The combination of the threaded rod and the adjusting nut of this utility model can achieve fine-tuning of positioning, and the jack can accurately push the horizontal iron to the appropriate position. The cooperation of the two eliminates the need to repeatedly adjust the stress balance during the disassembly and assembly process, greatly shortening the operation time of a single disassembly and assembly. The efficient disassembly and assembly operation can significantly improve the efficiency of furnace door maintenance, effectively ensure the continuity of coke oven production, and fundamentally reduce production losses and the risk of furnace door smoke. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 A magnified view of part of A.

[0018] Figure 3 This is a top view of the present invention.

[0019] Figure 4 for Figure 3 A magnified view of a portion of point B.

[0020] Figure 5 for Figure 3 A magnified view of a portion of point C.

[0021] Figure 6 This is a schematic diagram of the positioning block of this utility model.

[0022] Figures 1-6 In the diagram, the following components are labeled: 1 – horizontal iron for coke oven door, 2 – pad, 3 – mounting hole, 4 – oven door body, 5 – threaded hole, 6 – spring, 7 – cylindrical cavity, 8 – threaded rod, 9 – positioning block, 10 – positioning block insertion hole, 11 – adjusting nut, 12 – jack, 13 – inner groove, 14 – support column, 15 – pressure plate, 16 – force-bearing block, and 17 – wrench insertion hole. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings: Example

[0024] like Figure 1-6 As shown, a device for disassembling and assembling screws connecting the crossbar of a coke oven door to the steel structure of the door body is disclosed. A pad 2 is connected to the bottom of the crossbar 1 of the coke oven door, and mounting holes 3 are provided around the periphery of the pad 2. A cylindrical cavity 7 is fixedly installed on the door body 4, and a threaded hole 5 that matches the mounting hole 3 is opened on the top periphery of the cylindrical cavity 7. The crossbar 1 of the coke oven door is detachably connected to the door body 4 by a spring 6 and screws that pass through the mounting hole 3 and are inserted into the threaded hole 5.

[0025] The disassembly and assembly device includes threaded rods 8 on both sides of the horizontal iron plate 1 of the coke oven door. The threaded rods 8 replace the original screws, pass through the mounting holes 3 of the pad plate 2, and are threaded into the threaded holes 5. The upper end of the threaded rod 8 is provided with a positioning block 9. The two ends of the positioning block 9 have positioning block insertion holes 10 for the threaded rod 8 to pass through, so that the threaded rod 8 can move axially along the positioning block insertion holes 10. Through the structure of the threaded rod 8 passing through the positioning block 9, the pad plate 2, the cylindrical cavity 7 and screwing into the threaded hole 5, and with the adjusting nut 11 fitted above the positioning block insertion hole 10, the height position of the positioning block 9 can be precisely adjusted to achieve the overall fixation of the rigid frame of the device.

[0026] Above the positioning block insertion hole 10, the threaded rod 8 is fitted with an adjusting nut 11. The threaded engagement between the adjusting nut 11 and the threaded rod 8 provides a fine-tuning function, which can be flexibly adapted to the actual installation gap between the coke oven door crossbar 1 and the spring 6, effectively improving the versatility of the device for different working conditions.

[0027] A jack 12 is installed between the positioning block 9 and the coke oven door crossbar 1. This jack 12, as the core power component, can precisely push the coke oven door crossbar 1 to adjust its position, replacing traditional manual brute force adjustment and improving positioning accuracy. Specifically, during disassembly, the jack 12 applies a pushing force to the positioning block 9 and the coke oven door crossbar 1, creating a controllable gap between them. Simultaneously, because the stress of the spring 6 is offset by the rigid structure of the device, the coke oven door crossbar 1 will not rebound with the spring 6. During installation, the jack 12 pushes the coke oven door crossbar 1 downwards, driving the pad 2 and pressure plate 15 to move downwards against the spring force until the pad 2 is in contact with the top of the cylindrical cavity 7. At this point, the mounting hole 3 and the threaded hole 5 are precisely aligned, and the spring 6 is uniformly compressed to a pre-tightened state.

[0028] As a preferred embodiment, the cylindrical cavity 7 is provided with an inner groove 13, and a support column 14 is installed in the inner groove 13. The spring 6 is sleeved on the support column 14, and a pressure plate 15 is provided between the support column 14 and the pad 2. One end of the spring 6 is placed at the bottom of the inner groove 13 but is not fixedly connected, and the other end of the spring 6 is in contact with the pressure plate 15. One end of the support column 14 is fixedly connected to the bottom of the pressure plate 15, and the other end of the support column 14 is normally not in contact with the bottom of the inner groove 13. When in contact, the spring 6 reaches its maximum compression stroke. At this point, the support column 14 is fitted into the spring 6, and the pressure plate 15 presses down on the spring 6, completely confining the spring 6 within the cylindrical cavity 7, thus preventing the disordered release of stress in the spring 6. Simultaneously, the rigid structure bears the preload of the spring 6, transforming the elastic stress into the rigid support force of the device frame. This fundamentally counteracts the stress interference of the spring 6 on the screw, solving the problem of uneven screw force during assembly and disassembly. Structurally, it eliminates the risk of components flying off or slipping due to the elastic force of the spring 6, directly eliminating the safety hazards of traditional operations and ensuring the safety of operators.

[0029] As a preferred option, a force-bearing block 16 is provided at the top of the threaded rod 8, which provides the operator with a stable and reliable force-bearing point, avoids slippage when applying force with the hand, and improves the safety and accuracy of operation.

[0030] As a preferred option, a wrench insertion hole 17 is provided at the force-bearing block 16 for inserting a wrench. During operation, auxiliary tools such as wrenches can be inserted to reduce the difficulty of turning the threaded rod 8 through the lever principle, making it easier and more efficient for a single person to apply force.

[0031] As a preferred option, the threaded rods 8 are designed to be distributed diagonally on both sides of the horizontal iron 1 of the coke oven door.

[0032] As a preferred option, a reasonable gap is reserved between the outer wall of the threaded rod 8 and the inner wall of the mounting hole 3, which can reduce assembly interference between components, make the installation and adjustment process of the threaded rod 8 smoother, and reduce the difficulty of operation.

[0033] As a preferred option, the threads of the two threaded rods 8 are designed to have the same direction of rotation. When operating the wrench in the wrench socket 17, the consistency of the rotation can be ensured, thus improving work efficiency.

[0034] The specific operation process for disassembling and assembling the steel connecting screws between the horizontal iron block 1 of the coke oven door and the steel structure of the door body 4 using this utility model is as follows: (a) Installation Operation Step 1 Deployment of basic components and pre-installation of internal stress constraint components: The pressure plate 15, support column 14 and spring 6 are respectively installed into the inner groove 13 of the cylindrical cavity 7. The support column 14 is inserted into the spring 6. One end of the spring 6 is located at the bottom of the inner groove 13 of the cylindrical cavity 7, and the other end is in contact with the bottom of the pressure plate 15, so that the pressure plate 15 protrudes from the top of the cylindrical cavity 7.

[0035] Deploying the threaded rods 8 and positioning structure: Place the coke oven door crossbar 1 with the pad 2 at the bottom on top of the cylindrical cavity 7. At this time, due to the protrusion of the spring 6, there is a significant gap between the bottom of the pad 2 and the top of the cylindrical cavity 7. Take two threaded rods 8 with pre-installed positioning blocks 9, pass them through the positioning block insertion holes 10 on both sides of the positioning block 9, and then pass them through the diagonal mounting holes 3 of the pad 2 and screw them into the two diagonal threaded holes 5 of the cylindrical cavity 7. Tighten them by simultaneously driving the force-bearing block 16 at the top of the threaded rods 8 with a wrench. Adjust the adjusting nut 11 above the positioning block 9 so that the positioning block 9 is stably positioned above the coke oven door crossbar 1. Place the jack 12 between the positioning block 9 and the coke oven door crossbar 1 and initially tighten it.

[0036] Step 2 Start jack 12 and slowly apply pressure to push the coke oven door crossbar 1 and pad 2 downwards simultaneously. Pressure plate 15 then depresses spring 6, gradually compressing it. During this process, continuously observe the gap between the bottom of pad 2 and the top of the cylindrical cavity 7 until they are completely fitted together (see...). Figure 4 At this point, the two threaded rods 8 occupy only two diagonal threaded holes 5, while the other two threaded holes 5 are unused. The spring 6 is compressed to the pre-tightened state, which creates conditions for the smooth installation of the subsequent connecting screws.

[0037] Step 3 First, fix the empty threaded hole 5: pass the screw through the corresponding mounting hole 3 of the pad 2, and then screw it into the empty threaded hole 5 of the cylindrical cavity 7 and tighten it so that the pad 2 is fixed by the screw, ensuring that the position of the horizontal iron 1 of the coke oven door is stable; slowly depressurize the jack 12 and remove it, and gradually rotate the threaded rod 8 in the opposite direction and remove it.

[0038] Complete all screw fixing: After removing the threaded rod 8, immediately insert the remaining two connecting screws into its empty threaded hole 5, and tighten them alternately diagonally (tighten the corresponding diagonal screw after tightening each screw) until all four screws are in place. After confirming that everything is correct, the installation is complete.

[0039] (II) Disassembly Operation Step 1 Disassemble and replace the components according to the principle of 'constructing a rigid force transmission frame': First, remove the two diagonally distributed screws among the four screws connecting the coke oven door cross iron 1 pad 2 to the oven door body 4; then, insert the two threaded rods 8 of the pre-installed positioning blocks 9 through the diagonal mounting holes 3 of the pad 2 into the two empty threaded holes 5 of the cylindrical cavity 7 and screw them in tightly.

[0040] Complete positioning and deployment of jack 12: Adjust the adjusting nut 11 above the positioning block 9 to make the positioning block 9 stably positioned above the horizontal iron block 1 of the coke oven door; place the jack 12 between the positioning block 9 and the horizontal iron block 1 of the coke oven door, ensuring that the bottom of the jack 12 is in contact with the horizontal iron block 1 of the coke oven door and the top is pressed against the positioning block 9, forming a rigid force transmission system of "threaded rod-positioning block-jack-horizontal iron block", which initially constrains the preload of the spring 6.

[0041] Step 2 Precisely adjust the stress bearing state: Rotate the adjusting nut 11 above the positioning block 9 to fine-tune the height of the positioning block 9, ensuring that the jack 12 is in a "slightly tightened" state (no obvious force); start the jack 12 and slowly apply the jacking force. Through the rigid constraint between the positioning block 9 and the threaded rod 8, the horizontal iron 1 of the coke oven door moves slightly downward, and the pressure of the pressure plate 15 on the spring 6 gradually increases.

[0042] Confirm that the stress is completely offset: Continuously fine-tune the thrust of jack 12 until spring 6 is fully compressed (with no tendency to rebound). At this time, the connecting screws between the cross iron 1 of the coke oven door and the steel structure of the door body 4 are completely freed from the stress-bearing state.

[0043] Step 3 Step-by-step removal of remaining screws: The operator removes the remaining two connecting screws one by one.

[0044] Depressurization and device reset: After all screws are removed, slowly depressurize jack 12 to prevent spring 6 from popping out quickly due to sudden pressure reduction; after jack 12 is completely depressurized, rotate threaded rod 8 in the opposite direction and remove it, and finally remove coke oven door crossbar 1 smoothly to complete disassembly.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for disassembling and assembling the connecting screws between the crossbar of a coke oven door and the steel structure of the door body, characterized in that: The bottom of the coke oven door crossbar is connected to a pad, and the pad has mounting holes around its perimeter. A cylindrical cavity is fixedly installed on the door body, and a threaded hole that matches the mounting hole is opened on the top periphery of the cylindrical cavity. The coke oven door crossbar is detachably connected to the door body by a spring and a screw that passes through the mounting hole and is inserted into the threaded hole. The disassembly and assembly device includes threaded rods on both sides of the horizontal iron of the coke oven door. The threaded rods pass through the mounting holes and are inserted into the threaded holes. The upper end of the threaded rod is provided with a positioning block, and the two ends of the positioning block are provided with positioning block insertion holes for the threaded rod to pass through. Above the positioning block insertion holes, the threaded rod is fitted with an adjusting nut. A jack is provided between the positioning block and the horizontal iron of the coke oven door.

2. The disassembly and assembly device for the connecting screws between the cross iron of the coke oven door and the steel structure of the door body according to claim 1, characterized in that: The cylindrical cavity has an inner groove, and a support column is installed in the inner groove. The spring is sleeved on the outside of the support column, and a pressure plate is provided between the support column and the pad. The top of the support column is fixedly connected to the bottom of the pressure plate.

3. The device for disassembling and assembling the connecting screws between the crossbar of the coke oven door and the steel structure of the door body according to claim 1 or 2, characterized in that: The top of the threaded rod is provided with a force-bearing block.

4. The disassembly and assembly device for the connecting screws between the cross iron of the coke oven door and the steel structure of the door body as described in claim 3, characterized in that: The force-bearing block is provided with a wrench insertion hole for inserting a wrench.

5. The disassembly and assembly device for the connecting screws between the cross iron of the coke oven door and the steel structure of the door body according to claim 4, characterized in that: The threaded rods are distributed diagonally on both sides of the horizontal iron of the coke oven door.

6. The disassembly and assembly device for the connecting screws between the cross iron of the coke oven door and the steel structure of the door body according to claim 5, characterized in that: There is a gap between the outer wall of the threaded rod and the inner wall of the mounting hole.

7. The disassembly and assembly device for the connecting screws between the cross iron of the coke oven door and the steel structure of the door body as described in claim 6, characterized in that: The two threaded rods have the same thread direction.

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