A heat treatment furnace door operating device

Abstract

The present application relates to the technical field of heat treatment equipment, and relates to a heat treatment furnace door operation device. The driving assembly is used for driving the furnace door to reciprocate along a moving track to realize the opening and closing of the inlet and outlet, the material pressing mechanism presses the furnace door on the inlet and outlet, the driving part drives the furnace door and the counterweight at both ends of the driving chain to alternately ascend and descend, the counterweight synchronously descends when the furnace door ascends, and the counterweight synchronously ascends when the furnace door descends, the gravity of the two is mutually balanced to offset a part, and the technical effects of energy saving and consumption reduction, reliable operation and reduced maintenance cost are comprehensively realized; the support mechanism supports the furnace door opening the inlet and outlet, forms support limiting for the lifted furnace door, shares the load of the furnace door, reduces the stress of the guide mechanism, and prevents the furnace door from accidentally falling.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment technology, and specifically to a furnace door operating device for a heat treatment furnace. Background Technology

[0002] Heat treatment furnaces are widely used in the quenching, tempering, and annealing of metal workpieces. The furnace door is a heavy-duty, high-temperature resistant component with a significant weight. Currently, most heat treatment furnace doors use a single-sided or double-sided direct-pull lifting structure with a motor and chain. The furnace door opens and closes frequently, requiring the motor to output a full driving torque to overcome the weight of the door each time it is raised or lowered. Due to the high ambient temperature in heat treatment workshops, the motor and reducer operate under high torque and high load conditions for extended periods, resulting in significant heat loss and high energy consumption. The transmission chain, bearings, and reducer are subjected to heavy alternating loads, leading to accelerated wear, higher failure rates, and shorter equipment maintenance cycles. Furthermore, the direct-pull lifting mechanism causes significant impact during start-up and shutdown, resulting in poor stability of the furnace door's operation, prone to shaking and jamming, and in severe cases, misalignment of the furnace door seal, heat leakage, and impact on the stability of the heat treatment process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a furnace door operating device for heat treatment furnaces that can significantly reduce motor torque output and power loss and can use a drive motor with a smaller power specification.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A furnace door operating device for a heat treatment furnace, comprising: The furnace body is equipped with inlet and outlet ports. A door mechanism is provided on the furnace body. The door mechanism includes a furnace door and a drive assembly. The drive assembly is located above the furnace body. Moving tracks are provided on both sides of the inlet and outlet. The furnace door slides on the moving tracks. The drive assembly is driven to the furnace door. The drive assembly is used to drive the furnace door to reciprocate along the moving tracks to open and close the inlet and outlet. A pressing mechanism is provided on both sides of the furnace body. The pressing mechanism is positioned opposite to the furnace door and is used to press the furnace door tightly against the inlet and outlet. A support mechanism is provided on the furnace body, and the support mechanism is used to support the furnace door for opening the inlet and outlet ports; The drive assembly includes a drive component connected to a drive chain. One end of the drive chain is connected to the furnace door, and the other end is connected to a counterweight. The drive component drives the furnace door and the counterweight at both ends of the drive chain to rise and fall alternately.

[0005] In one embodiment of the present invention, the support mechanism includes a support base disposed on the furnace body, and a telescopic driver disposed on the support base. The telescopic driver is driven to be connected to a support rod, and the telescopic driver drives the support rod to pass through the moving track to support the rising furnace door.

[0006] In one embodiment of the present invention, a movable guide groove is provided on the movable track, a movable rod is provided on the side of the furnace door, a movable roller is provided on the movable rod, the movable roller slides on the movable guide groove, the movable guide groove is connected to an arc-shaped guide groove, the arc-shaped guide groove is provided at the lower part of the inlet and outlet, so that the furnace door moves along the arc-shaped guide groove toward the inlet and outlet.

[0007] In one embodiment of the present invention, the inlet and outlet are provided with mounting grooves around their perimeters, and a heat insulation pad is provided in the mounting grooves. When the furnace door is pressed against the inlet and outlet, the heat insulation pad is in contact with the furnace door.

[0008] In one embodiment of the present invention, the pressing mechanism includes a pressing frame and a pressing cylinder. The pressing frame is disposed on the side wall of the furnace body, and the pressing cylinder is driven to connect with the pressing rod. The pressing cylinder drives the pressing rod to press the furnace door tightly against the inlet and outlet.

[0009] In one embodiment of the present invention, a rotating seat is provided on the furnace body, the pressing cylinder is hinged to the pressing frame through a cylinder seat, the piston rod end of the pressing cylinder is hinged to the pressing rod, the middle part of the pressing rod is hinged to the rotating seat, and the pressing cylinder pushes the hinged end of the pressing rod away from the furnace body so that the free end of the pressing rod presses the furnace door tightly against the inlet and outlet.

[0010] In one embodiment of the present invention, the pressing rod is provided with a pressing opening, and the furnace door is provided with a fixed stop bar that matches the pressing opening. The width of the pressing opening is greater than the diameter of the fixed stop bar, so that a pressing gap is provided between the fixed stop bar and the pressing opening.

[0011] In one embodiment of the present invention, the driving component includes a driving frame disposed on the top of the furnace body, a reduction motor disposed in the middle of the driving frame, the two sides of the reduction motor being drivenly connected to the driving shaft respectively, a driving sprocket disposed on the driving shaft, a counterweight sprocket and a furnace door sprocket disposed on the driving frame, and a chain being sequentially connected to the furnace door, the furnace door sprocket, the driving sprocket, the counterweight sprocket and the counterweight block, the counterweight sprocket and the furnace door sprocket being staggered so that there is a movement gap between the counterweight block and the furnace door.

[0012] In one embodiment of the present invention, a driven sprocket is provided at the bottom of the furnace body, and an auxiliary chain is provided on the driven sprocket. One end of the auxiliary chain is connected to a counterweight, and the other end is connected to the bottom of the furnace door.

[0013] In one embodiment of the present invention, there are multiple counterweights, the weight of each counterweight is 1 / 4 to 1 / 3 of the weight of the furnace door, and each counterweight is connected to the drive chain or auxiliary chain by a spring rod.

[0014] The beneficial effects of this invention are: The drive assembly of this invention is used to drive the furnace door to reciprocate along the moving track to open and close the inlet and outlet. The pressing mechanism presses the furnace door tightly against the inlet and outlet. The drive component drives the furnace door and counterweight at both ends of the drive chain to alternately rise and fall. Since the counterweight moves synchronously when the furnace door rises and rises synchronously when the furnace door falls, the gravity of the two counterweights balances and offsets each other, significantly reducing the motor torque output and power loss. A smaller power drive motor can be selected. At the same time, the long-term load on the reducer and chain transmission mechanism is significantly reduced, the wear of transmission components is reduced in high-temperature environments, the equipment failure rate is reduced, and the service life is extended. Meanwhile, the counterweights on both sides make the furnace door lifting and stopping impact small, the operation is smooth, and the shaking and jamming are reduced. This helps to ensure the sealing accuracy of the furnace door, reduce the risk of heat leakage from the furnace, stabilize the heat treatment production conditions, and comprehensively achieve the technical effects of energy saving, reliable operation, and reduced maintenance costs. The support mechanism supports the furnace door when the inlet and outlet are opened, forms a support limit for the raised furnace door, shares the load of the furnace door, reduces the force on the guide mechanism, and prevents the furnace door from falling accidentally. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a furnace door operating device for a heat treatment furnace according to the present invention.

[0016] Figure 2 This is a schematic diagram of the driving component of the present invention.

[0017] Figure 3 This is a schematic diagram of the counterweight block of the present invention.

[0018] The following are the labels in the diagram: 1. Furnace body; 12. Support mechanism; 13. Support base; 14. Telescopic actuator; 15. Support rod; 17. Mounting groove; 18. Heat insulation pad; 2. Drive assembly; 21. Drive shaft; 22. Drive sprocket; 23. Gear motor; 24. Drive frame; 25. Furnace door sprocket; 26. Counterweight sprocket; 27. Drive chain; 28. Counterweight block; 3. Counterweight component; 4. Furnace door; 5. Moving track; 51. Moving roller; 52. Moving guide groove; 6. Pressing mechanism; 61. Pressing frame; 62. Pressing cylinder; 63. Pressing rod; 64. Pressing opening; 65. Fixed stop bar; 66. Rotating seat; 7. Driven sprocket. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Reference Figure 1-3 As shown, a furnace door operating device for a heat treatment furnace includes: Furnace body 1, which is provided with inlet and outlet ports; A door mechanism is provided on the furnace body 1. The door mechanism includes a furnace door 4 and a drive assembly 2. The drive assembly 2 is located above the furnace body 1. Moving tracks 5 are provided on both sides of the inlet and outlet. The furnace door 4 is slidably mounted on the moving tracks 5. The drive assembly 2 is drivenly connected to the furnace door 4. The drive assembly 2 is used to drive the furnace door 4 to reciprocate along the moving tracks 5 to open and close the inlet and outlet. A pressing mechanism 6 is provided on both sides of the furnace body 1. The pressing mechanism 6 is positioned opposite to the furnace door 4. The pressing mechanism 6 is used to press the furnace door 4 tightly against the inlet and outlet. A support mechanism 12 is provided on the furnace body 1, and the support mechanism 12 is used to support the furnace door 4 that opens the inlet and outlet ports; The drive assembly 2 includes a drive component connected to a drive chain 27. One end of the drive chain 27 is connected to the furnace door 4, and the other end is connected to a counterweight component 3, which is a counterweight block 28. The drive component drives the furnace door 4 and the counterweight block 28 at both ends of the drive chain 27 to rise and fall alternately.

[0021] The drive component 2 of this invention is used to drive the furnace door 4 to reciprocate along the moving track 5 to open and close the inlet and outlet. The pressing mechanism 6 presses the furnace door 4 tightly onto the inlet and outlet. The drive component drives the furnace door 4 and the counterweight 28 at both ends of the drive chain 27 to rise and fall alternately. A smaller power drive motor can be selected. At the same time, the long-term load on the reducer and chain transmission mechanism is significantly reduced, the wear of transmission components is reduced in high-temperature environments, the equipment failure rate is reduced, and the service life is extended. Meanwhile, the counterweights on both sides make the furnace door 4 less impacted when it rises and falls, run smoothly, reduce shaking and jamming, which helps to ensure the sealing accuracy of the furnace door 4, reduce the risk of heat leakage from the furnace, stabilize the heat treatment production conditions, and comprehensively achieve the technical effects of energy saving, reliable operation, and reduced maintenance costs. The support mechanism 12 supports the furnace door 4 when the inlet and outlet are opened, forms a support limit for the raised furnace door 4, shares the load of the furnace door 4, reduces the force on the guide mechanism, and prevents the furnace door 4 from falling accidentally.

[0022] As the counterweight 28 descends synchronously when the furnace door 4 rises and rises synchronously when the furnace door 4 descends, the gravity of the two counterweights balances and cancels each other out. Under actual working conditions, the steady-state load torque of the motor is only 5% to 15% of the original gravity torque, which greatly reduces the motor torque output and power loss. At the same time, the torque saved can be adjusted in a timely manner according to the different quantities and weights of the counterweights, so that the motor that originally had a capacity of 5000-6000 N / m can be replaced with a conventional 2500-400 N / m specification, which greatly reduces the requirements for the geared motor 23 and reduces the load.

[0023] In one embodiment of the present invention, the support mechanism 12 includes a support base 13, which is disposed on the furnace body 1. A telescopic driver 14 is disposed on the support base 13. The telescopic driver 14 is driven to connect with the support rod 15. The telescopic driver 14 drives the support rod 15 to pass through the moving track 5 to support the rising furnace door 4.

[0024] Specifically, when the telescopic actuator 14 is activated, it drives the support rod 15 to move relative to the support base 13. The support rod 15 is positioned corresponding to the moving track 5 and can pass through the area where the moving track 5 is located. When the furnace door 4 rises along the moving track 5 to the support position, the telescopic actuator 14 drives the support rod 15 to extend towards the moving track 5, so that the support rod 15 passes through the moving track 5 and is located at the support position of the furnace door 4. After the support rod 15 enters this position, it provides support for the furnace door 4, which has risen and opened the inlet and outlet ports, borne the load of the furnace door 4, reduced the stress on the guide mechanism, and prevented the furnace door 4 from falling accidentally. The support base 13, telescopic actuator 14, and support rod 15 constitute a drive-to-support action chain. The support base 13 provides an installation position relative to the furnace body 1. The telescopic actuator 14 transmits the action to the support rod 15, which passes through the moving track 5 and enters the area corresponding to the opening position of the furnace door 4. The extension of the support rod 15 corresponds to the rising state of the furnace door 4, ensuring that the support action is implemented after the furnace door 4 has left the inlet / outlet and opened. The arrangement of the support rod 15 passing through the moving track 5 allows the support effect to be formed within the area of ​​the moving track 5 without altering the basic operating relationship of the furnace door 4's raising and lowering via the moving track 5. The specific extension length, drive control method, quantity, and material of the support rod 15 can be determined according to the actual installation conditions of the furnace body 1 and the furnace door 4, as long as the telescopic actuator 14 can drive the support rod 15 through the moving track 5 and provide support for the raised furnace door 4.

[0025] In one embodiment of the present invention, a moving guide groove 52 is provided on the moving track 5, a moving rod is provided on the side of the furnace door 4, a moving roller 51 is provided on the moving rod, the moving roller 51 slides on the moving guide groove 52, the moving guide groove 52 is connected to the arc-shaped guide groove, the arc-shaped guide groove is provided at the lower part of the inlet and outlet, so that the furnace door 4 moves along the arc-shaped guide groove toward the inlet and outlet.

[0026] Specifically, the movable rod is used to connect the movable roller 51 to the side of the furnace door 4, and the movable roller 51 slides in the movable guide groove 52. When the furnace door 4 moves along the movable track 5 under the drive of the drive assembly 2, the movable rod moves synchronously with the furnace door 4, and the movable roller 51 slides in the movable guide groove 52. The movement of the furnace door 4 is guided by the cooperation between the movable roller 51 and the movable guide groove 52. The movable guide 52 is connected to the arc-shaped guide 52. After the movable roller 51 moves within the movable guide 52 to the position where the two are connected, it can enter the arc-shaped guide 52. The arc-shaped guide 52 is located at the lower part of the inlet and outlet. After the movable roller 51 of the furnace door 4 enters the arc-shaped guide 52, the furnace door 4 moves along the arc-shaped guide 52 towards the inlet and outlet. The arc-shaped guide 52 serves as the structural and functional boundary for connecting with the movable guide 52 and guiding the furnace door 4 towards the inlet and outlet. This allows the furnace door 4 to move along the arc-shaped guide 52 in an arc-shaped trajectory towards the inlet and outlet, ensuring smooth guidance and precise alignment and pressing of the inlet and outlet.

[0027] In one embodiment of the present invention, an installation groove 17 is provided around the perimeter of the inlet and outlet, and a heat insulation pad 18 is provided in the installation groove 17. When the furnace door 4 is pressed against the inlet and outlet, the heat insulation pad 18 is in contact with the furnace door 4.

[0028] Specifically, when the furnace door 4 returns to the inlet / outlet along the moving track 5 in the closed state and is pressed against the inlet / outlet by the pressing mechanism 6, the heat insulation pad 18 is attached to the furnace door 4 to form a heat insulation bonding interface between the furnace door 4 and the inlet / outlet. This can prevent the heat in the furnace from being conducted outward, reduce the heat loss of the furnace door 4, lower the surface temperature of the furnace door 4, and further seal the gaps to improve the overall sealing and heat insulation effect.

[0029] In one embodiment of the present invention, the pressing mechanism 6 includes a pressing frame 61 and a pressing cylinder 62. The pressing frame 61 is disposed on the side wall of the furnace body 1. The pressing cylinder 62 is driven to be connected to the pressing rod 63. The pressing cylinder 62 drives the pressing rod 63 to press the furnace door 4 against the inlet and outlet.

[0030] Specifically, the pressing cylinder 62 is driven to connect with the pressing rod 63. The pressing cylinder 62 drives the pressing rod 63 to press the furnace door 4 against the inlet and outlet. The pressing frame 61 provides a mounting base for the pressing cylinder 62 relative to the side wall of the furnace body 1. When the pressing cylinder 62 is activated, it transmits the driving force to the pressing rod 63, which then applies a pressing action towards the furnace door 4, making the furnace door 4 fit tightly against the inlet and outlet, resulting in good furnace sealing. The pressing force is adjustable and evenly distributed, preventing damage to the furnace door 4 and the seals. It can automatically complete the pressing and releasing actions, resulting in high production efficiency. The cylinder can maintain pressure continuously, making it resistant to vibration and not easy to loosen.

[0031] In one embodiment of the present invention, a rotating seat 66 is provided on the furnace body 1, the pressing cylinder 62 is hinged to the pressing frame 61 through the cylinder seat, the piston rod end of the pressing cylinder 62 is hinged to the pressing rod 63, the middle part of the pressing rod 63 is hinged to the rotating seat 66, and the pressing cylinder 62 pushes the hinged end of the pressing rod 63 away from the furnace body 1 so that the free end of the pressing rod 63 presses the furnace door 4 against the inlet and outlet.

[0032] Specifically, the hinged connection between the piston rod end and the pressure rod 63 allows the pushing action of the pressure cylinder 62 to be transmitted to the pressure rod 63; the hinged connection between the middle of the pressure rod 63 and the rotating seat 66 gives the pressure rod 63 a clear fulcrum of rotation, making the pressure rod 63 a lever structure. These hinged connections together form a force transmission chain with the rotating seat 66 as the fulcrum. When the hinged end of the pressure rod 63 is pushed away from the furnace body 1, the free end of the pressure rod 63 can rotate towards the furnace door 4 and apply pressure. At the same time, the action of the pressing mechanism 6 is coordinated with the opening and closing action of the furnace door 4. The pressing action of the pressing rod 63 on the furnace door 4 corresponds to the state after the furnace door 4 is closed, without hindering the opening and closing of the furnace door 4 along the moving track 5.

[0033] In one embodiment of the present invention, the pressing rod 63 is provided with a pressing opening 64, and the furnace door 4 is provided with a fixed stop bar 65 that matches the pressing opening 64. The width of the pressing opening 64 is greater than the diameter of the fixed stop bar 65, so that a pressing gap is provided between the fixed stop bar 65 and the pressing opening 64.

[0034] Specifically, the pressing gap is formed by the dimensional relationship between the width of the pressing opening 64 and the diameter of the matching fixed stop bar 65 on the side of the furnace door 4. That is, the pressing opening 64 does not form a completely equal width fit with the matching fixed stop bar 65 on the side of the furnace door 4. When the pressing rod 63 moves towards the furnace door 4 under the drive of the pressing cylinder 62, the pressing opening 64 and the matching fixed stop bar 65 on the side of the furnace door 4 maintain a matching relative relationship, and have a pressing gap caused by the opening width being greater than the rod diameter. The pressing frame 61 provides a mounting base for the pressing cylinder 62. The pressing cylinder 62 drives the pressing rod 63 to actuate, enabling the pressing action to be transmitted to the furnace door 4. The cylinder seat, piston rod end, middle of the pressing rod 63, and rotating seat 66 together form a hinged force transmission relationship, converting the linear pushing action of the pressing cylinder 62 into a pressing action at the free end. The width of the pressing opening 64 is greater than the diameter of the matching fixed stop rod 65 on the side of the furnace door 4, thus forming a pressing gap between the two to ensure the accuracy of pressing the furnace door 4. The pressing mechanism 6 thus achieves a pressing action towards the inlet and outlet when the furnace door 4 is closed, and cooperates with the aforementioned heat insulation pad 18 at the interface.

[0035] In one embodiment of the present invention, the driving component includes a driving frame 24 disposed on the top of the furnace body 1. A reduction motor 23 is disposed in the middle of the driving frame 24. The two sides of the reduction motor 23 are respectively driven and connected to the driving shaft 21. A driving sprocket 22 is disposed on the driving shaft 21. A counterweight sprocket 26 and a furnace door sprocket 25 are disposed on the driving frame 24. The chain is sequentially connected to the furnace door 4, the furnace door sprocket 25, the driving sprocket 22, the counterweight sprocket 26, and the counterweight block 28. The counterweight sprocket 26 and the furnace door sprocket 25 are staggered so that there is a movement gap between the counterweight block 28 and the furnace door 4.

[0036] Specifically, the drive frame 24 is used to support the geared motor 23, the furnace door sprocket 25 and the counterweight sprocket 26. After the geared motor 23 outputs power, it is transmitted to the corresponding drive sprocket 22 through the drive shafts 21 on both sides, thus forming a power transmission relationship from the geared motor 23 to the drive sprocket 22. The function of the geared motor 23 is to provide the power input for the rotation of the drive sprocket 22, and the drive shaft 21 is used to transmit the output of the geared motor 23 to the drive sprocket 22. The drive chain 27 is sequentially connected to the furnace door 4, the furnace door sprocket 25, the drive sprocket 22, the counterweight sprocket 26, and the counterweight block 28, forming a chain drive path from the furnace door 4 to the counterweight block 28. Specifically, one end of the drive chain 27 is connected to the furnace door 4, the drive chain 27 is connected along the drive path to the furnace door sprocket 25, then to the drive sprocket 22 on the drive shaft 21, and subsequently to the counterweight sprocket 26. The other end of the drive chain 27 is connected to the counterweight block 28. The furnace door sprocket 25, the drive sprocket 22, and the counterweight sprocket 26 work together to form a corresponding engagement with the drive path of the drive chain 27, enabling the power output by the geared motor 23 to be transmitted to the drive chain 27 via the drive shaft 21 and the drive sprocket 22. When the furnace door 4 rises, the corresponding moving track 5 moves towards the open position, and the counterweight 28 descends in the opposite direction along with the drive chain 27. When the furnace door 4 descends, the counterweight 28 rises in the opposite direction. The staggered positions of the furnace door sprocket 25 and the counterweight sprocket 26 are matched with the connection sequence of the drive chain 27, so that the connecting end of the furnace door 4 and the connecting end of the counterweight 28 correspond to different sprocket areas. Thus, during the alternating rise and fall of the furnace door 4 and the counterweight 28, a movement gap is maintained between them due to the staggered arrangement.

[0037] In one embodiment of the present invention, a driven sprocket 7 is provided at the bottom of the furnace body 1, and an auxiliary chain is provided on the driven sprocket 7. One end of the auxiliary chain is connected to the counterweight 28, and the other end is connected to the bottom of the furnace door 4.

[0038] Specifically, when the auxiliary chain and drive chain 27 coexist, the drive chain 27 serves as the main transmission chain that drives the furnace door 4 and the counterweight 28 to rise and fall alternately. The auxiliary chain forms an auxiliary connection between the counterweight 28 and the bottom of the furnace door 4 via the driven sprocket 7 at the bottom of the furnace body 1. The relationship between one end of the auxiliary chain and the bottom of the furnace door 4 ensures that the counterweight 28 and the bottom of the furnace door 4 remain connected through the auxiliary chain on the driven sprocket 7, resulting in minimal impact during the raising and lowering of the furnace door 4, smooth operation, and reduced shaking and jamming.

[0039] In one embodiment of the present invention, there are multiple counterweights 28, and the weight of each counterweight 28 is 1 / 4 to 1 / 3 of the weight of the furnace door 4. Each counterweight 28 is connected to the drive chain 27 or the auxiliary chain by a spring rod.

[0040] Specifically, multiple counterweights 28 can be connected to the drive chain 27 or the auxiliary chain respectively. Each counterweight 28 is connected to the drive chain 27 or the auxiliary chain via a spring rod, which is located between the counterweight 28 and the corresponding chain, thus forming an elastic connection between the counterweight 28 and the drive chain 27 or the auxiliary chain. The weight of each counterweight 28 is determined to be 1 / 4 to 1 / 3 of the weight of the furnace door 4. This weight range is used to define the relationship between the weight of a single counterweight 28 and the weight of the furnace door 4.

[0041] The spring pull rod can also provide some tension to the auxiliary chain, which reduces the impact of lifting and stopping the furnace door 4, ensures smooth operation, and reduces shaking and jamming.

[0042] The geared motor 23 outputs power, which is transmitted to the drive sprocket 22 via the drive shaft 21. The drive sprocket 22 drives the drive chain 27, which connects the furnace door 4 and the counterweight block 28 via the furnace door sprocket 25 and the counterweight sprocket 26, causing the furnace door 4 and the counterweight block 28 to rise and fall alternately. The furnace door sprocket 25 and the counterweight sprocket 26 are staggered, creating a movement gap between the furnace door 4 and the counterweight block 28. The driven sprocket 7 at the bottom of the furnace body 1 carries an auxiliary chain, which establishes an auxiliary connection path between the counterweight block 28 and the bottom of the furnace door 4. Multiple counterweight blocks 28 are configured according to 1 / 4 to 1 / 3 of the weight of the furnace door 4 and are connected to the drive chain 27 or the auxiliary chain via spring rods. The above-mentioned main chain drive, auxiliary chain connection, and spring rod connection relationship together constitute the chain drive and counterweight connection structure in the furnace door 4 operating device.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A furnace door operating device for a heat treatment furnace, characterized in that, include: The furnace body is equipped with inlet and outlet ports. A door mechanism is provided on the furnace body. The door mechanism includes a furnace door and a drive assembly. The drive assembly is located above the furnace body. Moving tracks are provided on both sides of the inlet and outlet. The furnace door slides on the moving tracks. The drive assembly is driven to the furnace door. The drive assembly is used to drive the furnace door to reciprocate along the moving tracks to open and close the inlet and outlet. A pressing mechanism is provided on both sides of the furnace body. The pressing mechanism is positioned opposite to the furnace door and is used to press the furnace door tightly against the inlet and outlet. A support mechanism is provided on the furnace body, and the support mechanism is used to support the furnace door for opening the inlet and outlet ports; The drive assembly includes a drive component connected to a drive chain. One end of the drive chain is connected to the furnace door, and the other end is connected to a counterweight. The drive component drives the furnace door and the counterweight at both ends of the drive chain to rise and fall alternately.

2. The furnace door operating device of the heat treatment furnace as described in claim 1, characterized in that, The support mechanism includes a support base, which is mounted on the furnace body. A telescopic actuator is mounted on the support base and is connected to a support rod. The telescopic actuator drives the support rod to pass through a moving track to support the rising furnace door.

3. The furnace door operating device of the heat treatment furnace as described in claim 1, characterized in that, The moving track is provided with a moving guide groove, the side of the furnace door is provided with a moving rod, the moving rod is provided with a moving roller, the moving roller slides on the moving guide groove, the moving guide groove is connected to the arc-shaped guide groove, the arc-shaped guide groove is provided at the lower part of the inlet and outlet, so that the furnace door moves along the arc-shaped guide groove toward the inlet and outlet.

4. The furnace door operating device of the heat treatment furnace as described in claim 1, characterized in that, The inlet and outlet are provided with mounting grooves around their perimeters, and heat insulation pads are placed inside the mounting grooves. When the furnace door is pressed against the inlet and outlet, the heat insulation pads are in contact with the furnace door.

5. The furnace door operating device of the heat treatment furnace as described in claim 1, characterized in that, The pressing mechanism includes a pressing frame and a pressing cylinder. The pressing frame is installed on the side wall of the furnace body, and the pressing cylinder is driven to connect with the pressing rod. The pressing cylinder drives the pressing rod to press the furnace door tightly against the inlet and outlet.

6. The furnace door operating device of the heat treatment furnace as described in claim 5, characterized in that, The furnace body is provided with a rotating seat. The pressing cylinder is hinged to the pressing frame through the cylinder seat. The piston rod end of the pressing cylinder is hinged to the pressing rod. The middle part of the pressing rod is hinged to the rotating seat. The pressing cylinder pushes the hinged end of the pressing rod away from the furnace body so that the free end of the pressing rod presses the furnace door tightly against the inlet and outlet.

7. The furnace door operating device of the heat treatment furnace as described in claim 5, characterized in that, The pressing rod is provided with a pressing opening, and the furnace door is provided with a fixed stop bar that matches the pressing opening. The width of the pressing opening is greater than the diameter of the fixed stop bar, so that a pressing gap is provided between the fixed stop bar and the pressing opening.

8. The furnace door operating device of the heat treatment furnace as described in claim 1, characterized in that, The driving component includes a driving frame mounted on the top of the furnace body. A geared motor is mounted in the middle of the driving frame. The geared motor is connected to a driving shaft on both sides. A driving sprocket is mounted on the driving shaft. A counterweight sprocket and a furnace door sprocket are mounted on the driving frame. The chain is connected in sequence to the furnace door, the furnace door sprocket, the driving sprocket, the counterweight sprocket, and the counterweight block. The counterweight sprocket and the furnace door sprocket are staggered to create a movement gap between the counterweight block and the furnace door.

9. The furnace door operating device of the heat treatment furnace as described in claim 8, characterized in that, A driven sprocket is provided at the bottom of the furnace body, and an auxiliary chain is provided on the driven sprocket. One end of the auxiliary chain is connected to a counterweight, and the other end is connected to the bottom of the furnace door.

10. The furnace door operating device of the heat treatment furnace as described in claim 9, characterized in that, The number of counterweights is multiple, and the weight of each counterweight is 1 / 4 to 1 / 3 of the weight of the furnace door. Each counterweight is connected to the drive chain or auxiliary chain by a spring rod.

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