Door bolt mechanism of large sintering cavity

Abstract

The invention discloses a door bolt mechanism of a large sintering cavity, and aims to overcome the defect that a pressing block mechanism on the sintering cavity realizes opening and pressing of a door by rotating a plurality of hand wheels, which is relatively tedious. The device comprises a bolt connecting rod, a plurality of door pressing cushion blocks fixed to a cavity door and a plurality of bolt bodies rotatably installed on a sintering cavity, the bolt bodies are all rotatably connected with the bolt connecting rod, and after any bolt body rotates, all the bolt bodies are driven by the bolt connecting rod to rotate together, and the bolt bodies are pressed on the corresponding door pressing cushion blocks. According to the door bolt mechanism, opening and pressing operation of the large sintering cavity door is facilitated, synchronous rotation of all the door bolt bodies can be achieved by operating a single door bolt body, the working efficiency is improved, and the pressing effect of the cavity door is good.

Description

Technical Field

[0001] This invention relates to the field of semiconductor processing technology, and more specifically, to a latch mechanism for a large sintering cavity. Background Technology

[0002] Existing door latch mechanisms for large sintering chambers (approximately three to four meters in height) that require opening and closing include several separate pressing mechanisms at the top and bottom. These pressing mechanisms consist of handwheels, screws, and pressing blocks. Opening and closing the door is achieved by rotating several handwheels, which is quite cumbersome. For example, Chinese patent application number 2020100553039 discloses an anti-slip device for a sintering furnace door, where the door is locked using a single locking structure. However, this locking structure is not suitable for large sintering chambers. Large sintering chambers require multiple locking points to lock the door, and opening and closing the door is achieved by operating handwheels at each of these points individually, which is also cumbersome. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a door bolt mechanism for a large sintering cavity, which greatly facilitates the opening and clamping operation of the large sintering cavity door, improves work efficiency, and provides a good clamping effect for the large sintering cavity door.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a door bolt mechanism for a large sintering cavity, comprising a door bolt connecting rod, a plurality of door pressing pads fixed on the cavity door, and a plurality of door bolt bodies rotatably installed on the sintering cavity. All door bolt bodies are rotatably connected to the door bolt connecting rod. After any one door bolt body rotates, it drives all door bolt bodies to rotate together through the door bolt connecting rod and presses the door bolt body onto the corresponding door pressing pad.

[0005] All the bolt bodies are connected together by a bolt connecting rod, allowing them to rotate synchronously. The bolt bodies are rotatably connected to the sintering chamber, while the pressure pads are fixed to the chamber door. After the chamber door is closed, rotating the bolt body or pushing the bolt connecting rod causes all the bolt bodies to rotate together and press against their corresponding pressure pads, thus locking the chamber door. When the door needs to be opened, rotating the bolt body in the opposite direction or pushing the bolt connecting rod in the opposite direction causes all the bolt bodies above and below to rotate, separating the bolt bodies from the pressure pads and allowing the chamber door to open.

[0006] The bolt mechanism of this application connects multiple bolt bodies into an integral structure through a bolt connecting rod. Operating a single bolt body can realize the synchronous rotation of all bolt bodies, which is convenient to operate, has high work efficiency, is suitable for opening and clamping positioning of the upper cavity door of large sintering chambers, and has a good clamping effect.

[0007] Preferably, the bolt body is provided with an inclined pressing surface, which presses against the door pressing pad.

[0008] The inclined clamping surface ensures that the bolt body can press firmly against the door clamping pad.

[0009] Preferably, a sliding abutment block is connected to the bolt body, a pre-tension spring is installed between the abutment block and the bolt body, and the pressing surface is set on the surface of the abutment block.

[0010] Because multiple bolt bodies and door pressure pads are provided, positional deviations may occur after prolonged use, causing some bolt bodies' pressing surfaces to fail to fully engage with the door pressure pads. To ensure a tighter seal, the bolt bodies are continuously rotated to ensure that all pressing surfaces on the bolt bodies are fully engaged with the door pressure pads, guaranteeing effective sealing and positioning of the door cavity. Since the pressing surfaces are located on the abutment block, which is slidably connected to the bolt body, only the bolt body rotates while the abutment block remains stationary during continued bolt body rotation after the pressing surfaces on the bolt bodies are engaged with the door pressure pads, preventing jamming.

[0011] As a preferred option, any one of the bolt bodies is fastened to the handle.

[0012] The handle design facilitates the rotation of the bolt body.

[0013] Preferably, the bolt body is provided with a shaft hole, a bushing is fitted inside the shaft hole, the bushing is fastened to the sintering cavity by a bolt screw, and a limiting ring is fitted on the bolt screw to limit the bolt body.

[0014] The bolt screw secures the bushing to the sintering chamber. During the rotation of the bolt body, the shaft hole rotates around the bushing smoothly and reliably. The limiting ring provides axial restraint for the bolt body.

[0015] Preferably, a rotating boss is provided on the bolt body, and a T-shaped hole is provided on the bolt connecting rod. The rotating boss is rotatably connected to the T-shaped hole, and the rotating boss is fastened to the connecting rod screw. The nut end of the connecting rod screw is limited at the large diameter of the T-shaped hole.

[0016] The movable boss on the bolt body is rotatably connected to the T-shaped hole on the bolt connecting rod. The nut end of the connecting rod screw is limited at the large diameter of the T-shaped hole, which realizes the axial limitation of the bolt connecting rod, thereby ensuring reliable rotation between the bolt connecting rod and the bolt body.

[0017] Preferably, the bolt body is provided with a positioning pin hole, and the sintering cavity is provided with an opening pin hole and a locking pin hole. After the bolt body is pressed on the door pressing pad, the positioning pin shaft is inserted into the positioning pin hole and the locking pin hole; after the bolt body is separated from the door pressing pad, the positioning pin shaft is inserted into the positioning pin hole and the opening pin hole.

[0018] After the door is fully opened, insert the positioning pin into the positioning pin hole and the door opening pin hole to lock and position the door bolt. After the door is fully pressed in place, insert the positioning pin into the positioning pin hole and the door locking pin hole to lock and position the door bolt.

[0019] In another embodiment, a locking mechanism and a handle are installed on the bolt body, and bolt screws are fastened to the sintering cavity. A positioning toothed plate is set on the bolt screw. The locking mechanism includes a locking pin and a push-pull plate. The end of the locking pin is stuck on the edge of the positioning toothed plate. A guide post is set on the locking pin. An inclined push groove is set on the push-pull plate. The guide post and the push groove are movably inserted and connected. A return spring is connected to the push-pull plate. A winding shaft is installed inside the handle. The winding shaft is connected to the pressure arm. A pull rope is connected between the winding shaft and the push-pull plate.

[0020] Before rotating the bolt, hold the handle and press the pressure arm to rotate the winding shaft. The winding shaft pulls the pull rope, which in turn moves the push-pull plate. The push groove on the push-pull plate engages with the guide post, causing the locking pin to move away from the positioning gear plate. The end of the locking pin disengages from the edge of the positioning gear plate, unlocking the bolt. Afterward, you can hold the handle and rotate the bolt. Once rotated to the desired position, release the handle. Under the action of the return spring, the locking pin returns to its original position, its end locking against the edge of the positioning gear plate, thus locking the bolt. This locks the bolt in the locked state after the door is fully opened or the cavity is fully closed and pressed in place, preventing accidental operation.

[0021] Preferably, the bolt body is provided with a sliding groove and a push-pull groove, the locking pin is slidably installed in the sliding groove, and the push-pull plate and return spring are installed in the push-pull groove.

[0022] The locking pin is slidably installed in the sliding groove, and the push-pull plate and return spring are installed in the push-pull groove, ensuring the smooth movement of the locking pin and the push-pull plate.

[0023] Preferably, an insertion groove is provided on the surface of the door pressure pad, and the insertion groove is slidably connected to the height adjustment pad.

[0024] When the height of the door pressure pad needs to be adjusted, simply select an adjustment pad of appropriate thickness and insert it into the slot, which is very convenient.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) The bolt mechanism of this application facilitates the opening and pressing operation of the cavity door of a large sintering cavity. The synchronous rotation of all bolts can be achieved by operating a single bolt, which improves work efficiency and the pressing effect of the cavity door is good; (2) An inclined pressing surface is provided on the bolt to ensure that the bolt can press the pressing pad; (3) The bolt can be rotated by the handle, which is convenient and labor-saving; (4) The pressing surface is set on a movable abutment block to ensure that the pressing surface on all bolts can press the pressing pad, avoiding the bolt jamming phenomenon; (5) After the bolt rotates to the position, it can be positioned and locked to maintain the posture. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the present invention.

[0027] Figure 2 This is a partial view of the connection between the bolt body and the handle of the present invention.

[0028] Figure 3 This is a cross-sectional view of the bolt body of the present invention.

[0029] Figure 4 This is a structural diagram of the positioning locking mechanism of the present invention.

[0030] Figure 5 This is a diagram of the connection of the abutment block of the present invention.

[0031] Figure 6 This is a connection diagram of the height adjustment pad of the present invention.

[0032] In the diagram: 1. Door bolt connecting rod, 2. Door pressure pad, 3. Door bolt body, 4. Pressing surface, 5. Handle, 6. Shaft hole, 7. Bushing, 8. Door bolt screw, 9. Limiting ring, 10. Rotating boss, 11. T-hole, 12. Connecting rod screw, 13. Locating pin hole, 14. Locating pin shaft, 15. Abutment block, 16. Preload spring, 17. Limiting groove, 18. Plug, 19. Locating gear plate 20. Locking pin; 21. Push-pull plate; 22. Guide post; 23. Push groove; 24. Extension groove; 25. Return spring; 26. Winding shaft; 27. Pressure arm; 28. Pull rope; 29. ​​Sliding groove; 30. Push-pull groove; 31. Limiting flange; 32. End cap; 33. Wire guide hole; 34. Wire guide wheel; 35. Transition wheel; 36. Insertion groove; 37. Height adjustment pad; 38. Connector. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A bolt mechanism for a large sintering cavity (see...) Figure 1 , Figure 2 , Figure 3 The sintering chamber comprises a bolt connecting rod 1, several door-pressing pads 2 fixed to the chamber door, and several bolt bodies 3 rotatably mounted on the sintering chamber. Therefore, the rotation centers of the bolt bodies 3 and the sintering chamber are on the same straight line. The bolt connecting rod 1 is a long strip structure, vertically arranged, and the bolt bodies 3 are vertically spaced. Each bolt body 3 is rotatably connected to the bolt connecting rod 1, so the rotation centers of the bolt bodies 3 and the bolt connecting rod 1 are on the same straight line. When any one bolt body 3 rotates, it drives all bolt bodies 3 to rotate together via the bolt connecting rod 1, causing the bolt bodies 3 to press against the corresponding door-pressing pads 2.

[0034] An inclined pressing surface 4 is provided on the bolt body 3, and the pressing surface 4 presses against the door pressing pad 2. During the process of the pressing surface 4 pressing against the door pressing pad 2, the raised end of the pressing surface 4 reaches the door pressing pad 2 first, and as the bolt body 3 rotates, the pressing surface 4 presses the door pressing pad 2 tightly. The inclined pressing surface 4 is provided to ensure that the bolt body 3 can press the door pressing pad 2 tightly.

[0035] Any one of the bolt bodies 3 is securely connected to a handle 5. The handle 5 facilitates the rotation of the bolt body 3; when a single bolt body 3 is rotated by holding the handle 5, the other bolt bodies 3 rotate synchronously. A shaft hole 6 is provided on the bolt body 3, and a bushing 7 is fitted inside the shaft hole 6. The bushing 7 and the shaft hole 6 are rotatably connected. The bushing 7 is securely connected to the sintering chamber by a bolt screw 8. A limiting ring 9 is fitted on the bolt screw 8, which limits the position of the bolt body 3. A spring washer is installed between the nut end of the bolt screw 8 and the limiting ring 9, thus limiting the bolt body 3 between the limiting ring 9 and the sintering chamber.

[0036] A rotating boss 10 is provided on the bolt body 3, and a T-shaped hole 11 is provided on the bolt connecting rod 1. The rotating boss 10 is rotatably connected to the small diameter part of the T-shaped hole 11. The rotating boss 10 is fastened to the connecting rod screw 12. The nut end of the connecting rod screw 12 is limited at the large diameter of the T-shaped hole 11, thereby achieving axial limitation of the bolt connecting rod 1 and ensuring reliable rotation between the bolt connecting rod 1 and the bolt body 3.

[0037] The bolt body 3 is provided with a positioning pin hole 13, and the sintering cavity is provided with an opening pin hole and a locking pin hole. After the bolt body 3 is pressed onto the door pressing pad 2, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the locking pin hole. After the bolt body 3 is separated from the door pressing pad 2, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the opening pin hole. After the cavity door is opened to the correct position, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the opening pin hole, thereby achieving the locking and positioning of the bolt body 3. After the cavity door is pressed to the correct position, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the locking pin hole, thereby achieving the locking and positioning of the bolt body 3.

[0038] All the bolt bodies 3 are connected together by the bolt connecting rod 1, allowing them to rotate synchronously. The bolt bodies 3 are rotatably connected to the sintering chamber, while the pressure pads 2 are fixed to the chamber door. After the chamber door is closed, rotating the bolt body 3 or pushing the bolt connecting rod 1 causes all the bolt bodies 3 to rotate together and press against the corresponding pressure pads 2, thus achieving door locking. When the door needs to be opened, rotating the bolt body 3 in the opposite direction or pushing the bolt connecting rod 1 in the opposite direction causes all the bolt bodies 3, both above and below, to rotate, separating them from the pressure pads 2 and allowing the chamber door to open.

[0039] Example 2: A bolt mechanism for a large sintering cavity (see...) Figure 4The sintering chamber comprises a bolt connecting rod 1, several door-pressing pads 2 fixed to the chamber door, and several bolt bodies 3 rotatably mounted on the sintering chamber. Therefore, the rotation centers of the bolt bodies 3 and the sintering chamber are on the same straight line. The bolt connecting rod 1 is a long strip structure, vertically arranged, and the bolt bodies 3 are vertically spaced. Each bolt body 3 is rotatably connected to the bolt connecting rod 1, so the rotation centers of the bolt bodies 3 and the bolt connecting rod 1 are on the same straight line. When any one bolt body 3 rotates, it drives all bolt bodies 3 to rotate together via the bolt connecting rod 1, causing the bolt bodies 3 to press against the corresponding door-pressing pads 2.

[0040] An inclined pressing surface 4 is provided on the bolt body 3, and the pressing surface 4 presses against the door pressing pad 2. During the process of the pressing surface 4 pressing against the door pressing pad 2, the raised end of the pressing surface 4 reaches the door pressing pad 2 first, and as the bolt body 3 rotates, the pressing surface 4 presses the door pressing pad 2 tightly. The inclined pressing surface 4 is provided to ensure that the bolt body 3 can press the door pressing pad 2 tightly.

[0041] Any one of the bolt bodies 3 is securely connected to a handle 5. The handle 5 facilitates the rotation of the bolt body 3; when a single bolt body 3 is rotated by holding the handle 5, the other bolt bodies 3 rotate synchronously. A shaft hole 6 is provided on the bolt body 3, and a bushing 7 is fitted inside the shaft hole 6. The bushing 7 and the shaft hole 6 are rotatably connected. The bushing 7 is securely connected to the sintering chamber by a bolt screw 8. A limiting ring 9 is fitted on the bolt screw 8, which limits the position of the bolt body 3. A spring washer is installed between the nut end of the bolt screw 8 and the limiting ring 9, thus limiting the bolt body 3 between the limiting ring 9 and the sintering chamber.

[0042] A rotating boss 10 is provided on the bolt body 3, and a T-shaped hole 11 is provided on the bolt connecting rod 1. The rotating boss 10 is rotatably connected to the small diameter part of the T-shaped hole 11. The rotating boss 10 is fastened to the connecting rod screw 12. The nut end of the connecting rod screw 12 is limited at the large diameter of the T-shaped hole 11, thereby achieving axial limitation of the bolt connecting rod 1 and ensuring reliable rotation between the bolt connecting rod 1 and the bolt body 3.

[0043] A locking mechanism and a handle 5 are installed on the bolt body 3. A bolt screw 8 is fastened to the sintering cavity. A positioning toothed disc 19 is provided on the bolt screw 8, with a ring of meshing teeth along its edge. The locking mechanism includes a locking pin 20 and a push-pull plate 21. Both the locking pin 20 and the push-pull plate 21 are slidably disposed, with their sliding directions perpendicular. The end of the locking pin 20 is engaged with the edge of the positioning toothed disc 19. A guide post 22 is provided on the locking pin 20, and an inclined pushing groove 23 is provided on the push-pull plate 21. The guide post 22 is movably inserted into the pushing groove 23. Extension grooves 24 are provided at both ends of the pushing groove 23, with the length direction of the extension grooves 24 perpendicular to the sliding direction of the locking pin 20. In the initial state, the guide post 22 is positioned in the extension groove 24 to limit the locking pin 20. A push-pull plate 21 is connected to a return spring 25. A winding shaft 26 is installed inside the handle 5. The winding shaft 26 is connected to a pressure arm 27 and is rotatably mounted. A pull rope 28 is connected between the winding shaft 26 and the push-pull plate 21. A sliding groove 29 and a push-pull groove 30 are provided on the bolt body 3. The locking pin 20 is slidably mounted in the sliding groove 29, and the push-pull plate 21 and the return spring 25 are mounted in the push-pull groove 30. A limiting flange 31 is provided at the end of the sliding groove 29. The locking pin 20 has a T-shaped structure, and the transition surface of the locking pin 20 is supported on the limiting flange 31. One end of the push-pull groove 30 is closed, and the other end of the push-pull groove 30 is connected to the end cover 32. The end cover 32 is provided with a wire passage hole 33. The return spring 25 abuts between the end cover 32 and the push-pull plate 21. A wire guide wheel 34 is installed at the wire passage hole 33 on the end cover 32. A transition wheel 35 is installed on the handle 5 near the end cover 32. The pull rope 28 passes around the transition wheel 35 and the wire guide wheel 34 and passes through the wire passage hole 33. The handle 5 has a hollow structure and a clearance groove is provided on the handle 5. The pressure arm 27 passes through the clearance groove.

[0044] Before rotating the bolt body 3, hold the handle 5 and press the pressure arm 27 to rotate the winding shaft 26. The winding shaft 26 pulls the pull rope 28, which in turn pulls the push-pull plate 21. The push groove 23 on the push-pull plate 21 engages with the guide post 22, causing the locking pin 20 to move away from the positioning toothed plate 19. The end of the locking pin 20 disengages from the edge of the positioning toothed plate 19, and the bolt body 3 is unlocked. Afterward, hold the handle 5 to rotate the bolt body 3. Once rotated to the desired position, release the handle 5. Under the action of the return spring 25, the locking pin 20 returns to its original position, and the end of the locking pin 20 is engaged with the edge of the positioning toothed plate 19, thus locking and positioning the bolt body 3. After the cavity door is fully opened or the cavity is fully closed and pressed in place, the bolt body 3 remains in the locked state to prevent accidental operation.

[0045] All the bolt bodies 3 are connected together by the bolt connecting rod 1, allowing them to rotate synchronously. The bolt bodies 3 are rotatably connected to the sintering chamber, while the pressure pads 2 are fixed to the chamber door. After the chamber door is closed, rotating the bolt body 3 or pushing the bolt connecting rod 1 causes all the bolt bodies 3 to rotate together and press against the corresponding pressure pads 2, thus achieving door locking. When the door needs to be opened, rotating the bolt body 3 in the opposite direction or pushing the bolt connecting rod 1 in the opposite direction causes all the bolt bodies 3, both above and below, to rotate, separating them from the pressure pads 2 and allowing the chamber door to open.

[0046] Example 3: A bolt mechanism for a large sintering cavity (see Figure 5 The sintering chamber comprises a bolt connecting rod 1, several door-pressing pads 2 fixed to the chamber door, and several bolt bodies 3 rotatably mounted on the sintering chamber. Therefore, the rotation centers of the bolt bodies 3 and the sintering chamber are on the same straight line. The bolt connecting rod 1 is a long strip structure, vertically arranged, and the bolt bodies 3 are vertically spaced. Each bolt body 3 is rotatably connected to the bolt connecting rod 1, so the rotation centers of the bolt bodies 3 and the bolt connecting rod 1 are on the same straight line. When any one bolt body 3 rotates, it drives all bolt bodies 3 to rotate together via the bolt connecting rod 1, causing the bolt bodies 3 to press against the corresponding door-pressing pads 2.

[0047] An inclined pressing surface 4 is provided on the bolt body 3, and the pressing surface 4 presses against the door pressing pad 2. During the process of the pressing surface 4 pressing against the door pressing pad 2, the raised end of the pressing surface 4 reaches the door pressing pad 2 first, and as the bolt body 3 rotates, the pressing surface 4 presses the door pressing pad 2 tightly. The inclined pressing surface 4 is provided to ensure that the bolt body 3 can press the door pressing pad 2 tightly.

[0048] A sliding abutment block 15 is connected to the bolt body 3. A preload spring 16 is installed between the abutment block 15 and the bolt body 3. A pressing surface 4 is provided on the surface of the abutment block 15. An arc-shaped limiting groove 17 is provided on the bolt body 3. The limiting groove 17 has a T-shaped cross-section. A T-shaped limiting head is provided on the abutment block 15. The limiting head is slidably adapted to the limiting groove 17. The preload spring 16 is installed in the limiting groove 17 and abuts against the limiting head. The limiting head abuts against the closed end of the limiting groove 17. A plug 18 is connected to the open end of the limiting groove 17. The preload spring 16 abuts against the plug 18.

[0049] Since multiple door bolt bodies 3 and door pressure pads 2 are provided, positional deviations occur after prolonged use, causing the pressing surfaces 4 on some door bolt bodies 3 to fail to fully press against the door pressure pads 2. To ensure the pressing effect, the door bolt bodies 3 are rotated further to ensure that the pressing surfaces 4 on all door bolt bodies 3 are fully pressed against the door pressure pads 2, thus guaranteeing the pressing and positioning effect on the cavity door. Because the pressing surfaces 4 are located on the abutment block 15, which is slidably connected to the door bolt body 3, during the subsequent rotation of the door bolt body 3 after the pressing surfaces 4 on the door bolt body 3 have pressed against the door pressure pads 2, only the door bolt body 3 rotates, while the abutment block 15 remains stationary, preventing jamming.

[0050] Any one of the bolt bodies 3 is securely connected to a handle 5. The handle 5 facilitates the rotation of the bolt body 3; when a single bolt body 3 is rotated by holding the handle 5, the other bolt bodies 3 rotate synchronously. A shaft hole 6 is provided on the bolt body 3, and a bushing 7 is fitted inside the shaft hole 6. The bushing 7 and the shaft hole 6 are rotatably connected. The bushing 7 is securely connected to the sintering chamber by a bolt screw 8. A limiting ring 9 is fitted on the bolt screw 8, which limits the position of the bolt body 3. A spring washer is installed between the nut end of the bolt screw 8 and the limiting ring 9, thus limiting the bolt body 3 between the limiting ring 9 and the sintering chamber.

[0051] A rotating boss 10 is provided on the bolt body 3, and a T-shaped hole 11 is provided on the bolt connecting rod 1. The rotating boss 10 is rotatably connected to the small diameter part of the T-shaped hole 11. The rotating boss 10 is fastened to the connecting rod screw 12. The nut end of the connecting rod screw 12 is limited at the large diameter of the T-shaped hole 11, thereby achieving axial limitation of the bolt connecting rod 1 and ensuring reliable rotation between the bolt connecting rod 1 and the bolt body 3.

[0052] The bolt body 3 is provided with a positioning pin hole 13, and the sintering cavity is provided with an opening pin hole and a locking pin hole. After the bolt body 3 is pressed onto the door pressing pad 2, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the locking pin hole. After the bolt body 3 is separated from the door pressing pad 2, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the opening pin hole. After the cavity door is opened to the correct position, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the opening pin hole, thereby achieving the locking and positioning of the bolt body 3. After the cavity door is pressed to the correct position, the positioning pin shaft 14 is inserted into the positioning pin hole 13 and the locking pin hole, thereby achieving the locking and positioning of the bolt body 3.

[0053] All the bolt bodies 3 are connected together by the bolt connecting rod 1, allowing them to rotate synchronously. The bolt bodies 3 are rotatably connected to the sintering chamber, while the pressure pads 2 are fixed to the chamber door. After the chamber door is closed, rotating the bolt body 3 or pushing the bolt connecting rod 1 causes all the bolt bodies 3 to rotate together and press against the corresponding pressure pads 2, thus achieving door locking. When the door needs to be opened, rotating the bolt body 3 in the opposite direction or pushing the bolt connecting rod 1 in the opposite direction causes all the bolt bodies 3, both above and below, to rotate, separating them from the pressure pads 2 and allowing the chamber door to open.

[0054] Example 4: A bolt mechanism for a large sintering cavity (see Figure 4 , Figure 5 The sintering chamber comprises a bolt connecting rod 1, several door-pressing pads 2 fixed to the chamber door, and several bolt bodies 3 rotatably mounted on the sintering chamber. Therefore, the rotation centers of the bolt bodies 3 and the sintering chamber are on the same straight line. The bolt connecting rod 1 is a long strip structure, vertically arranged, and the bolt bodies 3 are vertically spaced. Each bolt body 3 is rotatably connected to the bolt connecting rod 1, so the rotation centers of the bolt bodies 3 and the bolt connecting rod 1 are on the same straight line. When any one bolt body 3 rotates, it drives all bolt bodies 3 to rotate together via the bolt connecting rod 1, causing the bolt bodies 3 to press against the corresponding door-pressing pads 2.

[0055] An inclined pressing surface 4 is provided on the bolt body 3, and the pressing surface 4 presses against the door pressing pad 2. During the process of the pressing surface 4 pressing against the door pressing pad 2, the raised end of the pressing surface 4 reaches the door pressing pad 2 first, and as the bolt body 3 rotates, the pressing surface 4 presses the door pressing pad 2 tightly. The inclined pressing surface 4 is provided to ensure that the bolt body 3 can press the door pressing pad 2 tightly.

[0056] A sliding abutment block 15 is connected to the bolt body 3. A preload spring 16 is installed between the abutment block 15 and the bolt body 3. A pressing surface 4 is provided on the surface of the abutment block 15. An arc-shaped limiting groove 17 is provided on the bolt body 3. The limiting groove 17 has a T-shaped cross-section. A T-shaped limiting head is provided on the abutment block 15. The limiting head is slidably adapted to the limiting groove 17. The preload spring 16 is installed in the limiting groove 17 and abuts against the limiting head. The limiting head abuts against the closed end of the limiting groove 17. A plug 18 is connected to the open end of the limiting groove 17. The preload spring 16 abuts against the plug 18.

[0057] Since multiple door bolt bodies 3 and door pressure pads 2 are provided, positional deviations occur after prolonged use, causing the pressing surfaces 4 on some door bolt bodies 3 to fail to fully press against the door pressure pads 2. To ensure the pressing effect, the door bolt bodies 3 are rotated further to ensure that the pressing surfaces 4 on all door bolt bodies 3 are fully pressed against the door pressure pads 2, thus guaranteeing the pressing and positioning effect on the cavity door. Because the pressing surfaces 4 are located on the abutment block 15, which is slidably connected to the door bolt body 3, during the subsequent rotation of the door bolt body 3 after the pressing surfaces 4 on the door bolt body 3 have pressed against the door pressure pads 2, only the door bolt body 3 rotates, while the abutment block 15 remains stationary, preventing jamming.

[0058] Any one of the bolt bodies 3 is securely connected to a handle 5. The handle 5 facilitates the rotation of the bolt body 3; when a single bolt body 3 is rotated by holding the handle 5, the other bolt bodies 3 rotate synchronously. A shaft hole 6 is provided on the bolt body 3, and a bushing 7 is fitted inside the shaft hole 6. The bushing 7 and the shaft hole 6 are rotatably connected. The bushing 7 is securely connected to the sintering chamber by a bolt screw 8. A limiting ring 9 is fitted on the bolt screw 8, which limits the position of the bolt body 3. A spring washer is installed between the nut end of the bolt screw 8 and the limiting ring 9, thus limiting the bolt body 3 between the limiting ring 9 and the sintering chamber.

[0059] A rotating boss 10 is provided on the bolt body 3, and a T-shaped hole 11 is provided on the bolt connecting rod 1. The rotating boss 10 is rotatably connected to the small diameter part of the T-shaped hole 11. The rotating boss 10 is fastened to the connecting rod screw 12. The nut end of the connecting rod screw 12 is limited at the large diameter of the T-shaped hole 11, thereby achieving axial limitation of the bolt connecting rod 1 and ensuring reliable rotation between the bolt connecting rod 1 and the bolt body 3.

[0060] A locking mechanism and a handle 5 are installed on the bolt body 3. A bolt screw 8 is fastened to the sintering cavity. A positioning toothed disc 19 is provided on the bolt screw 8, with a ring of meshing teeth along its edge. The locking mechanism includes a locking pin 20 and a push-pull plate 21. Both the locking pin 20 and the push-pull plate 21 are slidably disposed, with their sliding directions perpendicular. The end of the locking pin 20 is engaged with the edge of the positioning toothed disc 19. A guide post 22 is provided on the locking pin 20, and an inclined pushing groove 23 is provided on the push-pull plate 21. The guide post 22 is movably inserted into the pushing groove 23. Extension grooves 24 are provided at both ends of the pushing groove 23, with the length direction of the extension grooves 24 perpendicular to the sliding direction of the locking pin 20. In the initial state, the guide post 22 is positioned in the extension groove 24 to limit the locking pin 20. A push-pull plate 21 is connected to a return spring 25. A winding shaft 26 is installed inside the handle 5. The winding shaft 26 is connected to a pressure arm 27 and is rotatably mounted. A pull rope 28 is connected between the winding shaft 26 and the push-pull plate 21. A sliding groove 29 and a push-pull groove 30 are provided on the bolt body 3. The locking pin 20 is slidably mounted in the sliding groove 29, and the push-pull plate 21 and the return spring 25 are mounted in the push-pull groove 30. A limiting flange 31 is provided at the end of the sliding groove 29. The locking pin 20 has a T-shaped structure, and the transition surface of the locking pin 20 is supported on the limiting flange 31. One end of the push-pull groove 30 is closed, and the other end of the push-pull groove 30 is connected to the end cover 32. The end cover 32 is provided with a wire passage hole 33. The return spring 25 abuts between the end cover 32 and the push-pull plate 21. A wire guide wheel 34 is installed at the wire passage hole 33 on the end cover 32. A transition wheel 35 is installed on the handle 5 near the end cover 32. The pull rope 28 passes around the transition wheel 35 and the wire guide wheel 34 and passes through the wire passage hole 33. The handle 5 has a hollow structure and a clearance groove is provided on the handle 5. The pressure arm 27 passes through the clearance groove.

[0061] Before rotating the bolt body 3, hold the handle 5 and press the pressure arm 27 to rotate the winding shaft 26. The winding shaft 26 pulls the pull rope 28, which in turn pulls the push-pull plate 21. The push groove 23 on the push-pull plate 21 engages with the guide post 22, causing the locking pin 20 to move away from the positioning toothed plate 19. The end of the locking pin 20 disengages from the edge of the positioning toothed plate 19, and the bolt body 3 is unlocked. Afterward, hold the handle 5 to rotate the bolt body 3. Once rotated to the desired position, release the handle 5. Under the action of the return spring 25, the locking pin 20 returns to its original position, and the end of the locking pin 20 is engaged with the edge of the positioning toothed plate 19, thus locking and positioning the bolt body 3. After the cavity door is fully opened or the cavity is fully closed and pressed in place, the bolt body 3 remains in the locked state to prevent accidental operation.

[0062] All the bolt bodies 3 are connected together by the bolt connecting rod 1, allowing them to rotate synchronously. The bolt bodies 3 are rotatably connected to the sintering chamber, while the pressure pads 2 are fixed to the chamber door. After the chamber door is closed, rotating the bolt body 3 or pushing the bolt connecting rod 1 causes all the bolt bodies 3 to rotate together and press against the corresponding pressure pads 2, thus achieving door locking. When the door needs to be opened, rotating the bolt body 3 in the opposite direction or pushing the bolt connecting rod 1 in the opposite direction causes all the bolt bodies 3, both above and below, to rotate, separating them from the pressure pads 2 and allowing the chamber door to open.

[0063] Example 5: A bolt mechanism for a large sintering cavity (see...) Figure 6 Its structure is similar to any one of embodiments 1 to 4, the main difference being that in this embodiment, an insertion groove 36 is provided on the surface of the door pressing pad 2, and the insertion groove 36 is slidably connected to the height adjustment pad 37. The insertion groove 36 is a dovetail groove, and a plug connector 38 adapted to the insertion groove 36 is provided on the height adjustment pad 37, and the plug connector 38 is movably inserted into the insertion groove. When it is necessary to adjust the height of the door pressing pad 2, it is only necessary to select a height adjustment pad 37 of appropriate thickness and insert it into the insertion groove 36, which is very convenient. Other structures are the same as any one of embodiments 1 to 4.

[0064] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A bolt mechanism for a large sintering cavity, characterized in that, It includes a door bolt connecting rod, several door pressure pads fixed on the cavity door, and several door bolt bodies rotatably installed on the sintering cavity. All door bolt bodies are rotatably connected to the door bolt connecting rod. After any door bolt body rotates, it drives all door bolt bodies to rotate together through the door bolt connecting rod and presses the door bolt body onto the corresponding door pressure pad.

2. The bolt mechanism for a large sintering cavity according to claim 1, characterized in that, An inclined pressing surface is provided on the bolt body, and the pressing surface presses against the door pressing pad.

3. The bolt mechanism for a large sintering cavity according to claim 2, characterized in that, A sliding abutment block is connected to the bolt body, and a preload spring is installed between the abutment block and the bolt body. The pressing surface is set on the surface of the abutment block.

4. The bolt mechanism for a large sintering cavity according to claim 1, characterized in that, Any bolt body can be used to securely connect the handle.

5. The bolt mechanism for a large sintering cavity according to claim 1, characterized in that, A shaft hole is provided on the bolt body, and a bushing is installed inside the shaft hole. The bushing is fastened to the sintering cavity by a bolt screw. A limiting ring is installed on the bolt screw, and the limiting ring limits the bolt body.

6. The bolt mechanism for a large sintering cavity according to claim 1, characterized in that, A rotating boss is provided on the bolt body, and a T-shaped hole is provided on the bolt connecting rod. The rotating boss is rotatably connected to the T-shaped hole. The rotating boss is fastened to the connecting rod screw, and the nut end of the connecting rod screw is limited at the major diameter of the T-shaped hole.

7. The bolt mechanism for a large sintering cavity according to claim 1, characterized in that, The bolt body is provided with a positioning pin hole, and the sintering cavity is provided with an opening pin hole and a locking pin hole. After the bolt body is pressed on the door pressing pad, the positioning pin shaft is inserted into the positioning pin hole and the locking pin hole; after the bolt body is separated from the door pressing pad, the positioning pin shaft is inserted into the positioning pin hole and the opening pin hole.

8. The bolt mechanism for a large sintering cavity according to claim 1, characterized in that, A locking mechanism and a handle are installed on the bolt body. A bolt screw is fastened to the sintering cavity. A positioning toothed plate is set on the bolt screw. The locking mechanism includes a locking pin and a push-pull plate. The end of the locking pin is stuck on the edge of the positioning toothed plate. A guide post is set on the locking pin. An inclined push groove is set on the push-pull plate. The guide post and the push groove are movably inserted and connected. A return spring is connected to the push-pull plate. A winding shaft is installed inside the handle. The winding shaft is connected to the pressure arm. A pull rope is connected between the winding shaft and the push-pull plate.

9. The bolt mechanism for a large sintering cavity according to claim 8, characterized in that, The bolt body is provided with a sliding groove and a push-pull groove. The locking pin is slidably installed in the sliding groove, and the push-pull plate and return spring are installed in the push-pull groove.

10. A bolt mechanism for a large sintering cavity according to any one of claims 1 to 9, characterized in that, An insertion groove is provided on the surface of the door pressure pad, and the insertion groove is slidably connected to the height adjustment pad.

Images