Quadrilateral opening and closing structure of furnace door

Abstract

The invention provides a furnace door quadrilateral opening and closing structure, and relates to the technical field of heating furnaces. The device comprises a stand column, an upper connecting rod, a furnace door, a lower connecting rod and a driving assembly, and the stand column is arranged on a hearth opening of the hearth; one end of the upper connecting rod is hinged to the stand column, the other end of the upper connecting rod stretches out in the direction away from the hearth and is connected with an upper rod shaft, and the upper rod shaft is rotationally connected to the top end of the furnace door through a bearing seat; one end of the lower connecting rod is hinged to the stand column and located below the upper connecting rod, the other end of the lower connecting rod stretches out in the direction away from the hearth and is hinged to a lower rod shaft, and the lower rod shaft is connected with the side, away from the hearth, of the furnace door; the driving assembly is connected with the bearing seat of the upper rod shaft and can drive the furnace door to ascend and descend. The furnace door only needs to occupy a small space when opened and closed, and has the advantages of being high in space utilization rate and convenient to replace the sealing gasket.

Description

Technical Field

[0001] The present application relates to the technical field of heating furnaces, and in particular to a quadrilateral opening and closing structure of a furnace door. Background Art

[0002] A heating furnace is a device commonly used for melting metal or keeping molten metal warm.

[0003] Existing heating furnace doors generally use a hinged structure. This hinged structure requires a vertical axis to be set at the edge of the furnace mouth, and then the furnace door is hinged to the vertical axis. This allows the user to open the furnace door by rotating it left (or right) around the vertical axis to perform operations such as sampling and slag removal in the furnace.

[0004] However, since the furnace door needs to occupy a large amount of space in front of the heating furnace when rotating around the axis, other equipment such as the heating furnace cannot be placed in this space, resulting in a large distance between the heating furnace and other equipment and low space utilization.

[0005] In view of this, it is necessary to provide a quadrilateral opening and closing structure of a furnace door. Summary of the Invention

[0006] In order to solve the problem that the existing heating furnace door needs to occupy a large amount of space in front of the heating furnace when opening and closing, resulting in low space utilization of the heating furnace, the present application provides a quadrilateral opening and closing structure of the furnace door.

[0007] The present application provides a quadrilateral opening and closing structure of a furnace door, which adopts the following technical solution: comprising a column, an upper connecting rod, a furnace door, a lower connecting rod and a driving assembly, wherein the column is provided on the mouth of the furnace; One end of the upper connecting rod is hinged to the column, and the other end of the upper connecting rod extends away from the furnace and is connected to an upper rod shaft, and the upper rod shaft is rotatably connected to the top end of the furnace door through a bearing seat; One end of the lower connecting rod is hinged on the column and is located below the upper connecting rod, and the other end of the lower connecting rod extends away from the furnace and is hinged to a lower rod shaft, and the lower rod shaft is connected to the side of the furnace door away from the furnace; The driving assembly is connected to the bearing seat of the upper rod shaft and can drive the furnace door to rise and fall.

[0008] By adopting the above technical solution, the upper connecting rod, the lower connecting rod and the furnace door can form a quadrilateral connecting rod mechanism with the column. When the furnace door needs to be opened, the user applies an upward force to the top of the furnace door through the driving component, so that the upper connecting rod and the lower connecting rod both rotate upward around the hinge between themselves and the column, thereby causing the quadrilateral connecting rod mechanism to deform upward, and causing the furnace door to move upward and no longer block the furnace mouth while only moving a short distance in the horizontal direction away from the furnace; when the furnace door needs to be closed, the user can turn off the driving component, and the furnace door will fall under the action of gravity and cause the quadrilateral connecting rod mechanism to deform downward, eventually restoring the furnace door to the state of blocking the furnace mouth, so that the furnace door does not need to occupy a large amount of space in front of the heating furnace when opening and closing, and the user can use this saved space to place other equipment, so that the heating furnace using the quadrilateral opening and closing structure of the furnace door has good space utilization.

[0009] Specifically, the lower connecting rod includes an upper bearing seat, a lower bearing seat and a connecting rod. The column is provided with a lower hinge shaft. The upper bearing seat is rotatably sleeved on the lower hinge shaft. The lower bearing seat is rotatably sleeved on the lower rod shaft. Threaded holes are provided at both ends of the connecting rod. The upper bearing seat is provided with an external thread that matches the threaded hole and is screwed to one end of the connecting rod via the external thread. The lower bearing seat is provided with an external thread that matches the threaded hole and is screwed to the other end of the connecting rod via the external thread.

[0010] By adopting the above technical solution, the arrangement of the connecting rod allows the user to replace the connecting rod when the lower connecting rod is damaged.

[0011] Specifically, the driving assembly includes a motor, a winding wheel and a connecting wire. The motor is arranged on the heating furnace, and the output shaft of the motor is transmission-connected to the winding wheel. One end of the connecting wire is tied to the winding wheel, and the other end of the connecting wire is connected to the bearing seat of the upper rod shaft.

[0012] By adopting the above technical solution, the user can control the winding wheel to retract and release the connecting wire by starting the motor to rotate forward or reverse, and then drive the furnace door up or down in conjunction with its own weight.

[0013] Furthermore, it also includes a counterweight assembly, which includes a counterweight rod and a counterweight block. The top end of the counterweight rod is hinged to the middle part of the upper connecting rod, and the bottom end of the counterweight rod is hinged to the counterweight block.

[0014] By adopting the above technical solution, the configuration component can apply a downward force to the upper connecting rod, so that the furnace door can be pressed tightly against the mouth of the furnace.

[0015] Furthermore, the counterweight assembly also includes a distance-adjusting pin, a counterweight waist-shaped hole is provided on the shaft of the counterweight rod in the vertical direction, a load-bearing rod is provided on the counterweight block, the load-bearing rod passes through the counterweight waist-shaped hole and can slide along the counterweight waist-shaped hole, a row of distance-adjusting holes is provided on the inner wall of the counterweight waist-shaped hole in the vertical direction, one end of the distance-adjusting pin can pass through any of the distance-adjusting holes and abut against the bottom of the shaft of the load-bearing rod, and limit the counterweight block from driving the load-bearing rod to slide along the counterweight waist-shaped hole.

[0016] By adopting the above technical solution, the user can change the distance between the load-bearing rod and the ground by inserting the distance-adjusting pin into different distance-adjusting holes and abutting against the bottom of the rod body of the load-bearing rod, thereby ensuring that when the upper connecting rod drives the load-bearing rod up and down through the counterweight rod, the counterweight block on the load-bearing rod is suspended above the ground.

[0017] Furthermore, it also includes a limiting member, which is arranged on the column and has a limiting waist-shaped hole on the limiting member. The limiting waist-shaped hole is inclined downward in the direction from close to away from the furnace, and the load-bearing rod is inserted into the limiting waist-shaped hole and can slide along the limiting waist-shaped hole.

[0018] By adopting the above technical solution, the limiting waist-shaped hole can limit the movement of the counterweight block in the vertical direction, and then limit the upward rotation range of the upper connecting rod around the hinge axis between itself and the column by limiting the movement of the counterweight block, thereby limiting the upward opening range of the furnace door; and the inclined limiting waist-shaped hole will not block the horizontal movement of the furnace door when opening and closing.

[0019] Furthermore, a sealing member is provided on a side of the furnace door away from the lower rod shaft, and the sealing member can abut against the edge of the furnace opening.

[0020] By adopting the above technical solution, the provision of the sealing member can increase the sealing between the furnace door and the furnace.

[0021] Furthermore, it also includes two locking shaft assemblies, wherein the upper connecting rod is provided with an upper rod waist-shaped hole along its length direction, and the column is provided with an upper hinge shaft, and the column is hinged to the upper connecting rod via the upper hinge shaft passing through the upper rod waist-shaped hole, and the upper hinge shaft can slide along the upper rod waist-shaped hole; The lower connecting rod is provided with a lower rod waist-shaped hole along its length direction, the upright post is hinged to the lower connecting rod via the lower hinge shaft passing through the lower rod waist-shaped hole, and the lower hinge shaft can slide along the lower rod waist-shaped hole; One of the two locking shaft assemblies is arranged in the waist-shaped hole of the upper rod and can abut against the upper hinge shaft when in a locked state to limit the upper hinge shaft from sliding along the waist-shaped hole of the upper rod. One of the two locking shaft assemblies is arranged in the waist-shaped hole of the lower rod and can abut against the lower hinge shaft when in a locked state to limit the lower hinge shaft from sliding along the waist-shaped hole of the lower rod. When both locking shaft assemblies are in the unlocked state, the upper hinge shaft can slide along the waist-shaped hole of the upper rod, the lower hinge shaft can slide along the waist-shaped hole of the lower rod, and the top end of the counterweight rod can rotate downward around the hinge between itself and the counterweight block. When the upper hinge shaft abuts against the hole wall of the upper rod waist-shaped hole away from the upper rod shaft, and the lower hinge shaft abuts against the hole wall of the lower rod waist-shaped hole away from the lower rod shaft, the seal on the furnace door flips to a direction away from the furnace chamber.

[0022] When the lock member is in the locked position, the user can lock the upper and lower hinge parts of the upper and lower parts of the hinge to prevent the upper and lower hinge parts from sliding along the waist-shaped hole of the upper and lower parts of the hinge, so that the lock member can be locked.

[0023] Furthermore, the locking shaft assembly includes a rotating rod, a mounting seat, a pair of clamping plates and a locking bolt. One end of the rotating rod can be rotatably connected to the hinge shaft corresponding to the locking shaft assembly, and the other end of the rotating rod is connected to the mounting seat. A clearance hole is provided on the mounting seat along the width direction of the rotating rod, and a connecting hole is provided on each of the clamping plates. The screw end of the locking bolt can sequentially pass through one of the two connecting holes, the clearance hole and the other of the two connecting holes and be screwed to the nut, so that the two clamping plates clamp the connecting rod corresponding to the locking shaft assembly.

[0024] By adopting the above technical solution, the user can tighten the nut on the locking bolt to make the two splints clamp the upper connecting rod or lower connecting rod corresponding to the lock shaft assembly, thereby limiting the upper hinge shaft corresponding to the lock shaft assembly from sliding along the waist-shaped hole of the upper rod or the corresponding lower hinge shaft from sliding along the waist-shaped hole of the lower rod.

[0025] Furthermore, the locking shaft assembly further includes an elastic member, which is disposed in the clearance through hole, and the elastic member can apply a force to the two clamps to drive the two clamps away from each other.

[0026] By adopting the above technical solution, after the nut on the locking bolt is loosened, the elastic member can apply force to the two splints to drive the two splints away from each other, thereby allowing the upper hinge shaft corresponding to the locking shaft assembly to slide along the waist-shaped hole of the upper rod or the corresponding lower hinge shaft to slide along the waist-shaped hole of the lower rod.

[0027] In summary, this application includes at least one of the following beneficial technical effects: The cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door, and the cam is hinged on the top of the furnace door. The upper connecting rod and the lower connecting rod both rotate upward around the hinges between themselves and the columns, thereby causing the quadrilateral connecting rod mechanism to deform upward, and causing the furnace door to move upward and no longer block the furnace chamber opening, while only moving a short distance in the horizontal direction away from the furnace chamber; when the furnace door needs to be closed, the user can turn off the drive assembly, and the furnace door will fall under the action of gravity, causing the quadrilateral connecting rod mechanism to deform downward, and finally restoring the furnace door to the state of blocking the furnace chamber opening, so that the furnace door does not need to occupy a large amount of space in front of the heating furnace when opening and closing. The user can use this saved space to place other equipment, so that the heating furnace using the quadrilateral opening and closing structure of the furnace door has a good space utilization rate; 2. It also includes two locking shaft assemblies, an upper rod waist-shaped hole is opened on the rod body of the upper connecting rod along its own length direction, an upper hinge shaft is provided on the column, the column passes through the upper rod waist-shaped hole via the upper hinge shaft and is hinged to the upper connecting rod, and the upper hinge shaft can slide along the upper rod waist-shaped hole, a lower rod waist-shaped hole is opened on the rod body of the lower connecting rod along its own length direction, the column passes through the lower rod waist-shaped hole via the lower hinge shaft and is hinged to the lower connecting rod, and the lower hinge shaft can slide along the lower rod waist-shaped hole, one of the two locking shaft assemblies is arranged in the upper rod waist-shaped hole, and can be locked with the upper hinge shaft when in a locked state. When the upper hinge shaft is in a locked position, the lower hinge shaft can slide along the waist-shaped hole of the upper rod, and the lower hinge shaft can slide along the waist-shaped hole of the lower rod, and the top end of the counterweight rod can rotate downward around the hinge joint between itself and the counterweight block. When the upper hinge shaft abuts against the hole wall of the upper rod waist-shaped hole away from the upper rod shaft, and the lower hinge shaft abuts against the hole wall of the upper rod waist-shaped hole away from the upper rod shaft, and the lower hinge shaft abuts against the hole wall of the lower rod waist-shaped hole When one end of the lower rod shaft abuts against the hole wall of the lower rod shaft, the seal on the furnace door is flipped to the direction away from the furnace chamber, so that when the furnace door is used normally, the user can adjust the two lock shaft assemblies to the locked state, at this time the lock shaft assembly in the waist-shaped hole of the upper rod can abut against the upper hinge shaft and restrict the upper hinge shaft from sliding along the waist-shaped hole of the upper rod, and the lock shaft assembly in the waist-shaped hole of the lower rod can abut against the lower hinge shaft and restrict the lower hinge shaft from sliding along the waist-shaped hole of the lower rod, so that the upper connecting rod and the lower connecting rod can rotate normally around the hinge shaft between themselves and the column; when the furnace door needs to be replaced When sealing, the user can first adjust the furnace door to a state that blocks the furnace chamber, then adjust both lock shaft assemblies to an unlocked state, and control the drive assembly to drive the furnace door to slowly descend. At this time, the upper hinge shaft can slide along the waist-shaped hole of the upper rod, the lower hinge shaft can slide along the waist-shaped hole of the lower rod, and the load-bearing rod of the counterweight block is in contact with the bottom end of the counterweight waist-shaped hole, so the counterweight rod will carry the furnace door and rotate downward around the load-bearing rod, thereby causing the side of the furnace door with the seal to flip to a direction away from the furnace chamber, thereby making it convenient for the user to replace the seal on the furnace door. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of the first embodiment of the present application; Figure 2 It is a front view of the first embodiment of the present application; Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction; Figure 4 is a perspective view of a second embodiment of the present application; Figure 5 is a right side view of the second embodiment of the present application, wherein the counterweight rod is deleted to facilitate the illustration of the lock shaft assembly on the limit member; Figure 6 It is along Figure 5 A schematic cross-sectional view taken along the BB direction shows only half of the quadrilateral opening and closing structure of the furnace door; Figure 7 It is along Figure 5 A schematic cross-sectional view taken along the CC direction, showing only part of the counterweight block, part of the limiting member and part of the counterweight rod.

[0029] 1. Column; 11. Upper hinge shaft; 12. Lower hinge shaft; 13. Channel steel; 2. Upper connecting rod; 21. Upper rod shaft; 3. Furnace door; 31. Seal; 32. Connecting ear; 33. Bearing seat; 4. Lower connecting rod; 41. Upper bearing seat; 42. Lower bearing seat; 43. Connecting rod; 44. Lower rod shaft; 5. Drive assembly; 51. Motor; 52. Winding wheel; 53. Connecting line; 6. Counterweight assembly; 61. Counterweight rod; 62. Counterweight block; 621. Load-bearing rod; 63. Adjusting pin; 7. Limiting member; 8. Locking shaft assembly; 81. Rotating rod; 82. Mounting seat; 83. Clamp; 831. Limiting protrusion; 84. Locking bolt; 85. Elastic member; 9. Abutting protrusion. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-7 For further explanation: See also Figure 1 and Figure 2In the first embodiment, a quadrilateral opening and closing structure of a furnace door is installed on the furnace mouth of the heating furnace. The quadrilateral opening and closing structure of the furnace door specifically includes two columns 1, two upper connecting rods 2, an upper rod shaft 21, a furnace door 3, two lower connecting rods 4, two lower rod shafts 44, a driving assembly 5, a counterweight assembly 6 and two limiters 7. The two columns 1 are arranged on the furnace mouth in parallel and relative to each other in the vertical direction. A channel steel 13 and a limiter 7 are provided in sequence from top to bottom on each column 1. An upper hinge shaft 11 and a lower hinge shaft 12 are provided in sequence from top to bottom on each channel steel 13. The two upper connecting rods 2 correspond to the two upper hinge shafts 11 one by one. One end of each upper connecting rod 2 is hinged to a corresponding upper hinge shaft 11, and the other end of each upper connecting rod 2 is hinged to the upper rod shaft 21. The middle part of the upper rod shaft 21 can be The rotatable connection is at the top of the furnace door 3; the two lower hinge shafts 12 and the two lower rod shafts 44 correspond one-to-one to the two lower connecting rods 4, one end of each lower connecting rod 4 is hinged on the corresponding lower hinge shaft 12, and the other end of each lower connecting rod 4 is hinged on the corresponding lower rod shaft 44. Two connecting ears 32 are provided on the side of the furnace door 3 away from the furnace chamber, and the two connecting ears 32 correspond one-to-one to the two lower rod shafts 44, and the shaft body of each lower rod shaft 44 is inserted into a corresponding connecting ear 32; a seal 31 is detachably connected to the side of the furnace door 3 away from the lower rod shaft 44, and the seal 31 can be abutted against the edge of the furnace chamber. The seal 31 can be made of high-temperature resistant silicone rubber, fluororubber or other materials, or it can be a more high-temperature resistant ceramic sealing ring, so that the setting of the seal 31 can increase the sealing between the furnace door 3 and the furnace chamber.

[0031] See also Figure 2 and Figure 3 The lower connecting rod 4 includes an upper bearing seat 41, a lower bearing seat 42 and a connecting rod 43. The column 1 is provided with a lower hinge shaft 12, the upper bearing seat 41 can be rotatably sleeved on the lower hinge shaft 12, and the lower bearing seat 42 can be rotatably sleeved on the lower rod shaft 44. Both ends of the connecting rod 43 are provided with threaded holes, and the upper bearing seat 41 is provided with an external thread adapted to the threaded hole and is screwed to one end of the connecting rod 43 through the external thread, and the lower bearing seat 42 is provided with an external thread adapted to the threaded hole and is screwed to the other end of the connecting rod 43 through the external thread, so that the user can replace the connecting rod 43 when the lower connecting rod 4 is damaged; specifically, the bearings in the above-mentioned upper bearing seat 41 and the lower bearing seat 42 can be high-temperature resistant, self-lubricating spherical bearings, so as to effectively prevent the phenomenon that the grease in ordinary bearings quickly fails under high temperature conditions and the machine needs to be frequently shut down to replace bearings, thereby effectively ensuring the long-term normal operation of the furnace door 3, improving efficiency and being highly practical.

[0032] See also Figure 2 and Figure 3The driving assembly 5 includes a motor 51, a winding wheel 52 and a connecting line 53. The upper connecting rod 2 includes a hanging rod, one end of the hanging rod is connected to the upper rod shaft 21, and the other end of the hanging rod is connected to the furnace door 3. The motor 51 is arranged on the heating furnace, and the output shaft of the motor 51 is transmission-connected to the winding wheel 52, one end of the connecting line 53 is tied to the winding wheel 52, and the other end of the connecting line 53 is connected to the hanging rod, so that the user can control the winding wheel 52 to retract and release the connecting line 53 by starting the motor 51 for forward or reverse rotation, and then drive the furnace door 3 to move up or down in conjunction with the weight of the furnace door 3; the driving assembly 5 of the present application can also use a hydraulic or electric system (not shown in the figure) to be transmission-connected to the upper connecting rod 2 or the lower connecting rod 4 and drive it to rotate to drive the furnace door 3 to move up and down, or use a cylinder (not shown in the figure) installed on the side of the heating furnace to drive the furnace door 3 to lift, so that the furnace door 3 can be opened upward. They are not listed here one by one.

[0033] See also Figure 2 and Figure 3 The counterweight assembly 6 includes two counterweight rods 61, a counterweight block 62 and two distance-adjusting pins 63. The two counterweight rods 61 correspond to the two upper connecting rods 2 one by one. The top of each counterweight rod 61 is hinged to the middle part of the corresponding upper connecting rod 2; the counterweight block 62 can be a roller-shaped weight. Both sides of the weight are provided with a bearing rod 621. The two counterweight rods 61 correspond to the two bearing rods 621 one by one. A counterweight waist-shaped hole is opened on the rod body of each counterweight rod 61 in the vertical direction. Each bearing rod 621 passes through a corresponding counterweight waist-shaped hole and can slide along the counterweight waist-shaped hole. The inner wall of each counterweight waist-shaped hole is opened in the vertical direction. There is a row of distance-adjusting holes, and two distance-adjusting pins 63 correspond one to one with two load-bearing rods 621. One end of each distance-adjusting pin 63 can pass through any distance-adjusting hole and abut against the bottom of the rod body of a corresponding load-bearing rod 621, and limit the counterweight block 62 from driving the load-bearing rod 621 to slide along the counterweight waist-shaped hole, so that the user can change the distance between the load-bearing rod 621 and the ground by inserting the distance-adjusting pin 63 into different distance-adjusting holes and abutting against the bottom of the rod body of the load-bearing rod 621, thereby ensuring that when the upper connecting rod 2 drives the load-bearing rod 621 to move up and down via the counterweight rod 61, the counterweight block 62 on the load-bearing rod 621 is suspended above the ground.

[0034] See also Figure 2 and Figure 3The two limit members 7 correspond to the two load-bearing rods 621 one by one, and each limit member 7 is provided with a limited waist-shaped hole, which is inclined downward in the direction from close to away from the furnace. Each load-bearing rod 621 is inserted into a corresponding limit waist-shaped hole and can slide along the limit waist-shaped hole, so that the limit waist-shaped hole can limit the movement of the counterweight block 62 in the vertical direction, and then limit the upward rotation of the upper connecting rod 2 around the hinge axis of itself and the column 1 by limiting the movement of the counterweight block 62, thereby limiting the upward opening range of the furnace door 3; and the inclined limit waist-shaped hole will not block the horizontal movement of the furnace door 3 when opening and closing; each load-bearing rod 621 is screwed with a plurality of bolts, which can abut against the counterweight rod 61 and the two sides of the limit member 7 and limit the counterweight block 62 from sliding along the length direction of the load-bearing rod 621.

[0035] The implementation principle of the first embodiment described in this application is: The upper connecting rod 2, the lower connecting rod 4, and the furnace door 3 can form a quadrilateral connecting rod mechanism with the column 1. When the furnace door 3 needs to be opened, the user starts the motor 51 to drive the winding wheel 52 to reel in the connecting wire 53, so that the connecting wire 53 applies an upward force to the top of the furnace door 3, so that the upper connecting rod 2 and the lower connecting rod 4 rotate upward around the hinge between themselves and the column 1, thereby causing the quadrilateral connecting rod mechanism to deform upward, and causing the furnace door 3 to move upward and no longer block the furnace mouth, while only moving a short distance in the horizontal direction away from the furnace. distance; when it is necessary to close the furnace door 3, the user can start the motor 51 to drive the twist pulley 52 to release the connecting wire 53, so that the furnace door 3 falls under the action of its own gravity and the counterweight block 62 and the quadrilateral connecting rod mechanism is deformed downward, and finally the furnace door 3 is restored to the state of blocking the furnace mouth, so that the furnace door 3 does not need to occupy a large amount of space in front of the heating furnace when opening and closing. The user can use this saved space to place other equipment, so that the heating furnace using the quadrilateral opening and closing structure of the furnace door has good space utilization.

[0036] See also Figure 4 、 Figure 5 、 Figure 6 and Figure 7In the second embodiment, a quadrilateral opening and closing structure of a furnace door also includes six lock shaft assemblies 8. An upper rod waist-shaped hole is opened on the rod body of each upper connecting rod 2 along its own length direction, and a lower rod waist-shaped hole is opened on each upper bearing seat 41 along the length direction of the connecting rod 42. The six lock shaft assemblies 8 are respectively arranged in two upper rod waist-shaped holes, two lower rod waist-shaped holes and two limit waist-shaped holes; each lock shaft assembly 8 includes a rotating rod 81, a mounting seat 82, a locking bolt 84, an elastic member 85 and a pair of clamping plates 83. A rotating hole is opened at one end of the rotating rod 81, and this end of the rotating rod 81 is rotatably sleeved on the hinge shaft corresponding to the lock shaft assembly 8 through a bearing, and the other end of the rotating rod 81 is connected to the mounting seat 82. A clearance hole is provided on the mounting seat 82 along the width direction of the rotating rod 81, and a connecting hole is provided on each clamping plate 83. The screw end of the locking bolt 84 can pass through one of the two connecting holes, the clearance hole and the other of the two connecting holes in sequence and be screwed to the nut, so that the two clamping plates 83 clamp the corresponding connecting rod of the lock shaft assembly 8, and the elastic member 85 is provided in the clearance hole. The elastic member 85 can be a compression spring so that the elastic member 85 can apply a force to the two clamping plates 83 to drive the two clamping plates 83 away from each other; a limiting protrusion 831 inserted into the clearance hole is also formed on the side plate surface of each clamping plate 83 close to the mounting seat 82, and the limiting protrusion 831 can abut against the inner wall of the clearance hole and slide along the clearance hole.

[0037] See also Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In the second embodiment, the bottom ends of the counterweight rods 61 are not provided with counterweight waist-shaped holes, and the bottom ends of each counterweight rod 61 are hinged on a corresponding load-bearing rod 621; four abutment protrusions 9 are formed on the upper connecting rod 2 rod body near the bottom ends of the two upper rod waist-shaped holes, on the lower connecting rod 4 rod body near the bottom ends of the two lower rod waist-shaped holes, and on the limiting piece 7 near the bottom ends of the two limiting waist-shaped holes. Every four abutment protrusions 9 are arranged in pairs with the corresponding waist-shaped hole as the center, and a support is formed between the two abutment protrusions 9 on the same side of the waist-shaped hole. The clamping plate 83 is provided with an abutment groove adapted to the clamping plate 83. The user can put the locking assembly into a locked state by tightening the nut on the locking bolt 84. At this time, the two ends of the clamping plate 83 can respectively enter into a corresponding abutment groove and abut against the groove wall of the abutment groove; the user can also put the locking assembly into an unlocked state by loosening the nut on the locking bolt 84. At this time, the elastic member 85 can apply a force to the two clamping plates 83 to drive the two clamping plates 83 away from each other, so that each clamping plate 83 leaves the corresponding abutment groove and can slide along the corresponding waist-shaped hole.

[0038] The implementation principle of the second embodiment described in this application is: When the furnace door 3 is in normal use, the user can adjust the lock shaft assemblies 8 on the upper connecting rod 2 and the lower connecting rod 4 to the locked state, and adjust the lock shaft assembly 8 on the limit piece 7 to the unlocked state. At this time, the lock shaft assembly 8 in the waist-shaped hole of the upper rod can abut against the upper hinge shaft 11 and limit the upper hinge shaft 11 to slide along the waist-shaped hole of the upper rod, and the lock shaft assembly 8 in the waist-shaped hole of the lower rod can abut against the lower hinge shaft 12 and limit the lower hinge shaft 12 to slide along the waist-shaped hole of the lower rod, so that the upper connecting rod 2 and the lower connecting rod 4 can rotate normally around the hinge shaft between themselves and the column 1, and the load-bearing rod 621 can slide normally along the limit waist-shaped hole; When the seal 31 on the furnace door 3 needs to be replaced, the user can first adjust the furnace door 3 to a state that blocks the furnace chamber, and then adjust the locking shaft assemblies 8 on the upper connecting rod 2 and the lower connecting rod 4 to the unlocked state, and adjust the locking shaft assembly 8 on the limit member 7 to the locked state, and then control the motor 51 to drive the winding wheel 52 to continue to release the connecting line 53. At this time, the upper hinge shaft 11 can slide along the waist-shaped hole of the upper rod, the lower hinge shaft 12 can slide along the waist-shaped hole of the lower rod, and the load-bearing rod 621 of the counterweight block 62 is clamped between the bottom end of the limit waist-shaped hole and the locking shaft assembly 8 on the limit waist-shaped hole, so the counterweight rod 61 will carry the furnace door 3 to rotate downward around the load-bearing rod 621, and then the side of the furnace door 3 with the seal 31 is flipped to a direction away from the furnace chamber, thereby making it convenient for the user to replace the seal 31 on the furnace door 3.

[0039] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A quadrilateral opening and closing structure for a furnace door, installed on the furnace opening of a heating furnace, characterized in that: It comprises a column (1), an upper connecting rod (2), a furnace door (3), a lower connecting rod (4) and a driving assembly (5), wherein the column (1) is arranged on the mouth of the furnace; One end of the upper connecting rod (2) is hinged to the column (1), and the other end of the upper connecting rod (2) extends in a direction away from the furnace and is connected to an upper rod shaft (21), and the upper rod shaft (21) is rotatably connected to the top end of the furnace door (3) through a bearing seat (33); One end of the lower connecting rod (4) is hinged on the column (1) and is located below the upper connecting rod (2); the other end of the lower connecting rod (4) extends in a direction away from the furnace and is hinged to a lower rod shaft (44); the lower rod shaft (44) is connected to a side of the furnace door (3) away from the furnace; The driving assembly (5) is connected to the bearing seat (33) of the upper rod shaft (21) and is capable of driving the furnace door (3) to rise and fall.

2. The quadrilateral opening and closing structure of a furnace door according to claim 1, characterized in that: The lower connecting rod (4) includes an upper bearing seat (41), a lower bearing seat (42) and a connecting rod (43); a lower hinge shaft (12) is provided on the column (1); the upper bearing seat (41) is rotatably sleeved on the lower hinge shaft (12); the lower bearing seat (42) is rotatably sleeved on the lower rod shaft (44); threaded holes are provided at both ends of the connecting rod (43); the upper bearing seat (41) is provided with an external thread adapted to the threaded hole and is screwed to one end of the connecting rod (43) via the external thread; the lower bearing seat (42) is provided with an external thread adapted to the threaded hole and is screwed to the other end of the connecting rod (43) via the external thread.

3. The quadrilateral opening and closing structure of a furnace door according to claim 1, characterized in that: The driving assembly (5) includes a motor (51), a winding wheel (52) and a connecting line (53); the motor (51) is arranged on the heating furnace, and the output shaft of the motor (51) is connected to the winding wheel (52) in a transmission manner; one end of the connecting line (53) is tied to the winding wheel (52), and the other end of the connecting line (53) is connected to the bearing seat (33) of the upper rod shaft (21).

4. The quadrilateral opening and closing structure of a furnace door according to claim 2, characterized in that: The invention also includes a counterweight assembly (6), wherein the counterweight assembly (6) includes a counterweight rod (61) and a counterweight block (62), wherein the top end of the counterweight rod (61) is hinged to the middle part of the upper connecting rod (2), and the bottom end of the counterweight rod (61) is hinged to the counterweight block (62).

5. The quadrilateral opening and closing structure of a furnace door according to claim 4, characterized in that: The counterweight assembly (6) further includes a distance-adjusting pin (63), a counterweight waist-shaped hole is provided on the shaft of the counterweight rod (61) in the vertical direction, a bearing rod (621) is provided on the counterweight block (62), the bearing rod (621) passes through the counterweight waist-shaped hole and can slide along the counterweight waist-shaped hole, a row of distance-adjusting holes is provided on the inner wall of the counterweight waist-shaped hole in the vertical direction, one end of the distance-adjusting pin (63) can pass through any of the distance-adjusting holes and abut against the bottom of the shaft of the bearing rod (621), thereby limiting the counterweight block (62) from driving the bearing rod (621) to slide along the counterweight waist-shaped hole.

6. The quadrilateral opening and closing structure of a furnace door according to claim 5, characterized in that: It also includes a limiting member (7), the limiting member (7) is arranged on the column (1), and a limiting waist-shaped hole is opened on the limiting member (7), the limiting waist-shaped hole is inclined downward in the direction from close to away from the furnace, and the load-bearing rod (621) is inserted into the limiting waist-shaped hole and can slide along the limiting waist-shaped hole.

7. The quadrilateral opening and closing structure of a furnace door according to claim 5, characterized in that: A sealing member (31) is provided on the side of the furnace door (3) away from the lower rod shaft (44), and the sealing member (31) can abut against the edge of the furnace.

8. The quadrilateral opening and closing structure of a furnace door according to claim 7, characterized in that: It also includes two locking shaft assemblies (8), the upper connecting rod (2) is provided with an upper rod waist-shaped hole along its own length direction, the column (1) is provided with an upper hinge shaft (11), the column (1) passes through the upper rod waist-shaped hole via the upper hinge shaft (11) and is hinged to the upper connecting rod (2), and the upper hinge shaft (11) can slide along the upper rod waist-shaped hole; The lower connecting rod (4) is provided with a lower rod waist-shaped hole along its length direction, and the upright column (1) is hinged to the lower connecting rod (4) via the lower hinge shaft (12) passing through the lower rod waist-shaped hole, and the lower hinge shaft (12) can slide along the lower rod waist-shaped hole; One of the two locking shaft assemblies (8) is arranged in the waist-shaped hole of the upper rod and can abut against the upper hinge shaft (11) when in a locked state to limit the upper hinge shaft (11) from sliding along the waist-shaped hole of the upper rod; one of the two locking shaft assemblies (8) is arranged in the waist-shaped hole of the lower rod and can abut against the lower hinge shaft (12) when in a locked state to limit the lower hinge shaft (12) from sliding along the waist-shaped hole of the lower rod; When both locking shaft assemblies (8) are in the unlocked state, the upper hinge shaft (11) can slide along the waist-shaped hole of the upper rod, the lower hinge shaft (12) can slide along the waist-shaped hole of the lower rod, and the top end of the counterweight rod (61) can rotate downward around the hinge between itself and the counterweight block (62). When the upper hinge shaft (11) abuts against the hole wall of one end of the waist-shaped hole of the upper rod away from the upper rod shaft (21), and the lower hinge shaft (12) abuts against the hole wall of one end of the waist-shaped hole of the lower rod away from the lower rod shaft (44), the sealing member (31) on the furnace door (3) flips to a direction away from the furnace chamber.

9. The quadrilateral opening and closing structure of a furnace door according to claim 8, characterized in that: The locking shaft assembly (8) includes a rotating rod (81), a mounting seat (82), a pair of clamping plates (83) and a locking bolt (84). One end of the rotating rod (81) is rotatably connected to the hinge shaft corresponding to the locking shaft assembly (8), and the other end of the rotating rod (81) is connected to the mounting seat (82). A clearance hole is provided on the mounting seat (82) along the width direction of the rotating rod (81). Each of the clamping plates (83) is provided with a connecting hole. The screw end of the locking bolt (84) can pass through one of the two connecting holes, the clearance hole and the other of the two connecting holes in sequence and be screwed to the nut, so that the two clamping plates (83) clamp the connecting rod corresponding to the locking shaft assembly (8).

10. The quadrilateral opening and closing structure of a furnace door according to claim 9, characterized in that: The locking shaft assembly (8) further comprises an elastic member (85), wherein the elastic member (85) is arranged in the clearance through hole, and the elastic member (85) is capable of applying a force to the two clamping plates (83) to drive the two clamping plates (83) away from each other.

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