Safety adjustment method for a door device with adjustable closing height

Abstract

The present invention relates to a safe adjustment method for a door device with adjustable closing height, which belongs to the field of thermal processing technology and solves the problem that the locking structure of the thermal insulation door is complicated and the closing height of the thermal insulation door is not adjustable in the prior art. The present invention includes the following steps: pulling up the door assembly; locking the door assembly; detecting the state of the door assembly; hanging and repairing the door assembly; adjusting the closing height of the door assembly; unlocking the door assembly; dropping and locking the door assembly; pulling up the door assembly, and the adjustment is completed. The present invention can increase the adaptability of the door assembly to the thermoforming machine, and can set the closing height of the door assembly and realize self-locking, which can prevent the door assembly from falling off, reduce the scale of the accident, and avoid causing personal injury and property loss.

Description

Technical Field

[0001] The present invention belongs to the technical field of hot forming processing, and particularly relates to a safety adjustment method for a door device with adjustable closing height. Background Art

[0002] All kinds of heating furnaces, drying furnaces, etc. required for existing industrial production are equipped with heat-insulating doors. To ensure that the heat in the furnace does not escape, it is required that the heat-insulating door be tightly sealed after closing. Most of the locking mechanisms of traditional heat-insulating doors adopt the method of pressing by pneumatic or screw mechanisms, and a vertical pressure is applied to the heat-insulating door by a cylinder push rod or a screw rod. However, this method requires manufacturing a set of independent pneumatic mechanisms or independent mechanical screw mechanisms and necessary air sources. First, the manufacturing cost of the pneumatic mechanism is relatively high, and the installation of such mechanisms is also restricted by space. Especially in workplaces without air sources, the pneumatic mechanism cannot be used. Second, the screw mechanism requires separate manual operation, and the degree of automation is low.

[0003] Equipment such as hot forming machines will also be equipped with heat-insulating door systems according to requirements. According to different molds required by the hot forming process, the heat-insulating door system requires that the closing height of the heat-insulating door be adapted to the mold. The traditional heat-insulating door system can only achieve a closed state at a single height.

[0004] The heat-insulating door is thick and heavy, with a large mass. Once it falls due to a fault, the heat-insulating door will form a free fall, damaging production equipment and even causing casualties.

[0005] Therefore, there is an urgent need for a safety adjustment method for a door device that can self-tighten and has an adjustable closing height. Summary of the Invention

[0006] In view of the above analysis, the embodiment of the present invention aims to provide an adjustment method for a door device with adjustable closing height, so as to solve the problems that the locking structure of the existing heat-insulating door is complex and the closing height of the heat-insulating door is not adjustable.

[0007] The object of the present invention is mainly achieved by the following technical solutions:

[0008] A safety adjustment method for a door device with adjustable closing height, using a door device with adjustable closing height. The safety adjustment method for the door device with adjustable closing height includes the following steps:

[0009] Lift up the door assembly;

[0010] Lock the door assembly;

[0011] Detect the state of the door assembly;

[0012] Suspend and repair the door assembly;

[0013] Adjust the closing height of the door assembly;

[0014] Unlock the door assembly;

[0015] Drop and lock the door assembly;

[0016] Pull up the door assembly to finish the adjustment.

[0017] Furthermore, pulling up the door assembly includes:

[0018] The door assembly is pulled up by a lifting mechanism to complete the lifting action of the door assembly; at this time, the pulley is in the slideway.

[0019] Furthermore, detecting the state of the door assembly includes: if the state of the door assembly is abnormal or it is separated from the lifting mechanism, perform step 4; if the state of the door assembly is normal, perform step 5.

[0020] Furthermore, adjusting the closing height of the door assembly includes sub-steps: loosening the slideway assembly;

[0021] Furthermore, loosening the slideway assembly includes: screwing out the locking screw from the sliding sleeve to release the connection between the sliding sleeve and the guide post, thereby releasing the fixation of the slideway assembly, and the slideway assembly can slide on the guide post.

[0022] Furthermore, unlocking the door assembly includes:

[0023] The power cylinder pulls the bolt, making the bolt retract into the guide sleeve until the bolt completely exits from the hollow part of the hanging ring, and the safety bolt completes the unlocking of the door assembly.

[0024] Furthermore, dropping and locking the door assembly includes:

[0025] The lifting mechanism extends, pushing the door assembly to tilt downward along the direction of the slideway and then toward the hot forming machine, and finally completes the door closing action and realizes self-locking due to its own gravity and the downward thrust of the lifting mechanism.

[0026] Furthermore, the door device with adjustable closing height includes a door assembly, a lifting mechanism, a bracket, a slideway assembly and a safety bolt. The lifting mechanism and the bracket are both arranged on the hot forming machine. The door assembly is respectively connected to the lifting mechanism and the slideway assembly, and the slideway assembly and the safety bolt are arranged on the bracket.

[0027] Furthermore, the slideway assembly includes a sliding sleeve and a locking screw.

[0028] Furthermore, the bracket includes a guide post and a support rod.

[0029] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0030] (1) In the step of adjusting the closing height of the door assembly of the present invention, the up and down position of the slideway assembly on the bracket can be adjusted by adjusting the length of the support rod, the height of the slideway assembly can be set, and finally the closing height of the door assembly can be set and adjusted, enhancing the applicability of the door assembly;

[0031] (2) The step of dropping and locking the door assembly in the present invention enables the door assembly to tilt and drop along the groove towards the hot forming machine, and finally complete the door closing action and achieve self-locking due to its own gravity and the downward thrust of the lifting mechanism.

[0032] (3) The step of locking the door assembly in the present invention uses a safety bolt to hook the door assembly, which can prevent the door assembly from falling off and reduce the degree of accident damage, avoiding personal injury and property loss.

[0033] (4) The descent mechanism in the step of slow descent and maintenance of the door assembly in the present invention includes damping fluid. By utilizing the property that the liquid is incompressible, the flow rate of the damping fluid discharged from the descent mechanism can be restricted, slowing down the falling speed of the door assembly when it accidentally falls off, preventing the door assembly from free falling, ensuring that the door assembly will not have a safety accident due to falling, and guaranteeing the safety of personnel and equipment.

[0034] In the present invention, the above technical solutions can be combined with each other to achieve more preferred combined solutions. Other features and advantages of the present invention will be described in the following content. Moreover, some advantages can be made obvious from the description, or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the content specifically pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings are only for the purpose of showing specific embodiments and are not considered as limitations of the present invention. Throughout the drawings, the same reference signs represent the same components.

[0036] Figure 1 It is a flowchart of the safety adjustment method for a door device with adjustable closing height;

[0037] Figure 2 It is a general structural schematic diagram of a door device with adjustable closing height;

[0038] Figure 3 It is a structural schematic diagram of the door assembly;

[0039] Figure 4 It is a structural schematic diagram of the lifting mechanism;

[0040] Figure 5 It is a structural schematic diagram of the mounting block;

[0041] Figure 6 It is a structural schematic diagram of the bracket;

[0042] Figure 7 It is a structural schematic diagram of the slideway assembly;

[0043] Figure 8 It is a structural schematic diagram of the descent mechanism;

[0044] Reference Signs: 1 - Door assembly; 11 - Door body; 12 - Mounting base; 13 - Pulley; 14 - Hanging ring; 2 - Lifting mechanism; 21 - Lifting cylinder; 22 - Mounting block; 221 - Vertical plate; 222 - Horizontal plate; 223 - Reinforcing rib; 3 - Bracket; 31 - Guide post; 32 - Support rod; 321 - Connecting rod; 322 - First screw; 323 - Second screw; 4 - Slideway assembly; 41 - Main board; 42 - Sliding seat; 43 - Bush; 44 - Locking screw; 45 - Slideway; 46 - Buffer limiter; 5 - Safety bolt; 51 - Power cylinder; 52 - Guide bush; 53 - Plug; 6 - Slow - descent mechanism; 61 - Sleeve; 62 - Piston; 63 - Damping liquid pipe; 64 - Liquid reservoir; 65 - First regulating valve; 66 - Second regulating valve; 67 - First connecting rod; 68 - Second connecting rod; 69 - Universal joint; 7 - Hot - forming machine. Detailed Embodiment

[0045] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings. Among them, the accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, rather than to limit the scope of the present invention.

[0046] Embodiment 1

[0047] A specific embodiment of the present invention, as Figure 1 shown, discloses a safety adjustment method for a door device with adjustable closing height (hereinafter referred to as the adjustment method).

[0048] The above - mentioned adjustment method uses a door device with adjustable closing height (hereinafter referred to as the door device), including a door assembly 1, a lifting mechanism 2, a bracket 3, a slideway assembly 4, a safety bolt 5, and a slow - descent mechanism 6. The lifting mechanism 2, the bracket 3, and the slow - descent mechanism 6 are all arranged on the hot - forming machine 7. The door assembly 1 is respectively connected to the lifting mechanism 2, the slideway assembly 4, and the slow - descent mechanism 6. The door assembly 1 can slide up and down on the slideway assembly 4. The slideway assembly 4 and the safety bolt 5 are arranged on the bracket 3.

[0049] The above - mentioned adjustment method includes the following steps:

[0050] Step 1: Lift the door assembly 1:

[0051] The door assembly 1 is lifted by the lifting mechanism 2. When the lifting mechanism 2 contracts to the limit position, the lifting action of the door assembly 1 is completed. At this time, the pulley 13 is in the slideway 45. At the same time, the piston 62 is pulled up by the door assembly 1 and slides out of the sleeve 61. The damping liquid stored in the liquid reservoir 64 is pumped through the damping liquid pipe 63 to the space between the sleeve 61 and the piston 62.

[0052] Step 2: Lock the door assembly 1;

[0053] The power cylinder 51 pushes the bolt 53, causing the bolt 53 to extend from within the guide sleeve 52 until the bolt 53 is inserted into the hollow portion of the hanging loop 14; at this time, the safety bolt 5 completes the hooking of the door assembly 1, preventing the door assembly from falling off and reducing the scale of the accident, avoiding personal injury and property damage.

[0054] Step 3: Detect the status of the door assembly 1;

[0055] If the status of the door assembly 1 is abnormal or it is detached from the lifting mechanism 2, execute Step 4; if the status of the door assembly 1 is normal, execute Step 5;

[0056] Step 4: Hang and repair the door assembly 1;

[0057] Hang the door assembly 1 through the safety bolt 5 and repair the door assembly 1; after the repair is completed, execute Step 5;

[0058] Step 5: Adjust the closing height of the door assembly 1, including the following sub-steps:

[0059] Step 51: Loosen the slideway assembly 4;

[0060] The slideway assembly 4 further includes a sliding sleeve 43 and a locking screw 44; the bracket 3 includes a guide post 31 and a support rod 32;

[0061] Specifically, unscrew the locking screw 44 from the sliding sleeve 43 to release the connection between the sliding sleeve 43 and the guide post 31, thereby releasing the fixation of the slideway assembly 4, and now the slideway assembly 4 can slide on the guide post 31;

[0062] Step 52: Adjust the length of the support rod 32 and reset the height of the slideway assembly 4;

[0063] The support rod 32 includes a connecting rod 321, a first screw rod 322, and a second screw rod 323;

[0064] Specifically, after connecting the connecting rod 321, the first screw rod 322, and the second screw rod 323, keeping the first screw rod 322 and the second screw rod 323 stationary, rotating the connecting rod 321 can simultaneously retract or extend the first screw rod 322 and the second screw rod 323, thereby adjusting the length of the support rod 32; by adjusting the length of the support rod 32, the vertical position of the slideway assembly 4 on the bracket 3 can be adjusted, thereby setting the height of the slideway assembly 4, and finally the closing height of the door assembly 1 can be determined;

[0065] Step 53: Lock and fix the slideway assembly 4;

[0066] Specifically, screw the locking screw 44 into the sliding sleeve 43 to fixedly connect the sliding sleeve 43 and the guide post 31, thereby fixing the position of the slideway assembly 4, and now the slideway assembly 4 cannot slide on the guide post 31;

[0067] Step 54: Complete the height setting of the slideway assembly 4;

[0068] Step 6: Unlock the door assembly 1;

[0069] The power cylinder 51 pulls the bolt 53 to retract the bolt 53 into the guide sleeve 52 until the bolt 53 completely exits from the hollow part of the hanging ring 14; at this time, the safety bolt 5 completes the unlocking of the door assembly 1.

[0070] Step 7: Lower and lock the door assembly 1;

[0071] The lifting mechanism 2 extends, pushing the door assembly 1 to tilt downward along the direction of the slideway 45 and then toward the hot forming machine 7, and finally completes the door closing action and realizes self-locking due to its own gravity and the downward thrust of the lifting mechanism 2; the piston 62 is pressed down by the door assembly 1 and slides into the sleeve 61, and the damping fluid in the sleeve 61 is discharged to the liquid reservoir 64 through the damping fluid pipe 63;

[0072] Step 8: Lower slowly and repair the door assembly 1;

[0073] If during the process of Step 8, the door assembly 1 detaches from the lifting mechanism 2 and falls due to a malfunction, the piston 62 is pressed by the gravity of the door assembly 1 and slides into the sleeve 61. Since the first regulating valve 65 sets the maximum flow rate when the damping fluid is discharged, the speed at which the piston 62 slides into the sleeve 61 is also restricted, preventing the door assembly 1 from free falling;

[0074] After the repair, return to Step 1;

[0075] Step 9: Lift the door assembly 1, and the adjustment is completed;

[0076] The lifting mechanism 2 shortens, pulling the door assembly 1 to move obliquely upward along the slideway 45 in a direction away from the hot forming machine 7, completing the unlocking and opening of the door. When the lifting mechanism 2 contracts to the limit position, the lifting action of the door assembly 1 is completed. At this time, the pulley 13 is still within the slideway 45; the adjustment of the door device is completed.

[0077] Embodiment 2

[0078] Another specific embodiment of the present invention, as Figure 2 shown, discloses a door device with adjustable closing height (hereinafter referred to as the door device) used in the adjustment method of Embodiment 1, including a door assembly 1, a lifting mechanism 2, a bracket 3, a slideway assembly 4, a safety bolt 5, and a slow descent mechanism 6. The lifting mechanism 2, the bracket 3, and the slow descent mechanism 6 are all arranged on the hot forming machine 7. The door assembly 1 is respectively connected to the lifting mechanism 2, the slideway assembly 4, and the slow descent mechanism 6. The door assembly 1 can slide up and down on the slideway assembly 4. The slideway assembly 4 and the safety bolt 5 are arranged on the bracket 3.

[0079] The door device of the present invention is applicable to the plugging work of working mechanisms under hot processing, hot forming or normal temperature.

[0080] Preferably, as Figure 3 shown, the door assembly 1 includes a door body 11, a mounting seat 12 and a pulley 13.

[0081] The top end of the door body 11 is connected to the mounting seat 12, and the mounting seat 12 is connected to the lifting mechanism 2 to realize the lifting of the door body 11. Pulley 13 is provided at both ends of the door body 11, and the pulley 13 can roll on the slideway assembly 4, so that the door assembly 1 slides along the route specified by the slideway assembly 4, while reducing the frictional resistance of the door assembly 1 sliding up and down.

[0082] Preferably, as Figure 4 shown, the lifting mechanism 2 includes a lifting cylinder 21 and a mounting block 22. One end of the lifting cylinder 21 is connected to the door body 11 through the mounting seat 12, and the other end of the lifting cylinder 21 is connected to the hot forming machine 7 through the mounting block 22.

[0083] Preferably, the lifting cylinder 21 is a hydraulic cylinder, an electric cylinder or a pneumatic cylinder. The lifting cylinder 21 provides the lifting power for the door assembly 1.

[0084] Preferably, as Figure 5 shown, the mounting block 22 includes a longitudinal plate 221, a transverse plate 222 and a reinforcing rib 223. The longitudinal plate 221 and the transverse plate 222 are fixedly connected at 90°. There are a plurality of threaded holes on the longitudinal plate 221, and the lifting cylinder 21 is screwed to the longitudinal plate 221 according to the installation height requirement to realize the adjustment of the installation height dimension of the lifting cylinder 21 in the vertical direction. A plurality of oblong holes are opened on the transverse plate 222, and the transverse plate 222 is screwed to the hot forming machine 7 through the oblong holes. By selecting different oblong holes and screwing the transverse plate 222 to the hot forming machine 7 at different positions in the oblong holes, the position adjustment of the longitudinal plate 221 in the four directions of front, back, left and right can be realized, and further the position adjustment of the lifting cylinder 21 in the four directions of front, back, left and right can be realized.

[0085] Compared with the prior art, the mounting block 22 of the present invention can realize the position adjustment of the lifting cylinder 21 in six directions of up, down, front, back, left and right, so as to realize the position adjustment of the door assembly 1 in six directions of up, down, front, back, left and right, and strengthen the matching degree between the door assembly 1 and the hot forming machine 7.

[0086] Preferably, the reinforcing rib 223 is arranged between the longitudinal plate 221 and the transverse plate 222, and the reinforcing rib 223 makes the connection between the longitudinal plate 221 and the transverse plate 222 more firm.

[0087] Preferably, as Figure 6 shown, the bracket 3 includes a guide post 31 and a support rod 32. The guide post 31 is fixedly connected to the hot forming machine 7, and a support rod 32 is provided at the lower end of the guide post 31.

[0088] Preferably, the guide post 31 is a prism. Further, the guide post 31 is a quadrangular prism. The slideway assembly 4 can slide up and down on the guide post 31, but cannot rotate on the guide post 31.

[0089] Preferably, the support rod 32 includes a connecting rod 321, a first screw 322, and a second screw 323.

[0090] Preferably, the support rod 32 is a support rod with adjustable length. Counterbores are provided at both ends of the connecting rod 321. The counterbores are provided with internal threads. The internal thread at one end is left-handed, and the internal thread at the other end is right-handed.

[0091] Preferably, one end of the first screw 322 is movably connected to the slideway assembly 4. External threads are provided at the other end of the first screw 322. The first screw 322 can be screwed into or out of the counterbore of the connecting rod 321; one end of the second screw 323 is movably connected to the guide post 31. External threads are provided at the other end of the second screw 323. The second screw 323 can be screwed into or out of the counterbore of the connecting rod 321. The rotation direction of the external thread of the second screw 323 is opposite to the rotation direction of the external thread of the first screw 322.

[0092] After connecting the connecting rod 321, the first screw 322, and the second screw 323, keeping the first screw 322 and the second screw 323 stationary and rotating the connecting rod 321 can simultaneously retract or extend the first screw 322 and the second screw 323, thereby adjusting the length of the support rod 32.

[0093] Compared with the prior art, by adjusting the length of the support rod 32, the up and down position of the slideway assembly 4 on the bracket 3 can be adjusted, thereby setting the height of the slideway assembly 4, and finally the closing height of the door assembly 1 can be set.

[0094] Preferably, referring to Figure 6 and Figure 7 , the slideway assembly 4 includes a main board 41, a sliding seat 42, a sliding sleeve 43, a locking screw 44, and a slideway 45. The sliding seat 42, the sliding sleeve 43, and the slideway 45 are all arranged on the main board 41. The locking screw 44 is arranged on the sliding sleeve 43.

[0095] Preferably, the sliding seat 42 is arranged on the guide post 31. The sliding seat 42 can slide on the guide post 31; the sliding seat 42 is arranged at one end of the main board 41 and is connected to the first screw 322. Adjusting the length of the support rod 32 can adjust the up and down position of the sliding seat 42 on the bracket 3, thereby setting the height of the slideway assembly 4.

[0096] Preferably, the sliding sleeve 43 is arranged on the guide post 31. The sliding sleeve 43 can slide on the guide post 31. Through a plurality of sliding sleeves 43, the slideway assembly 4 can slide up and down on the guide post 31; the locking screw 44 can be screwed into and out of the sliding sleeve 43. When the locking screw 44 is screwed into the sliding sleeve 43, the friction between the sliding sleeve 43 and the guide post 31 can be increased, and finally the slideway assembly 4 is fixed on the guide post 31.

[0097] Preferably, as Figure 7 shown, the slideway 45 includes a groove, and a single pulley 13 is accommodated in the groove. The pulley 13 can roll along the groove in the groove, thereby driving the door assembly 1 to move along the direction of the groove.

[0098] Preferably, the shape of the groove is L-shaped, and one end of the groove is inclined downward toward the direction of the hot forming machine 7.

[0099] Compared with the prior art, the door assembly 1 of the present invention can tilt and fall along the groove toward the direction of the hot forming machine 7, and finally complete the door closing action and realize self-locking due to its own gravity and the downward thrust of the lifting mechanism 2.

[0100] Preferably, the slideway assembly 4 includes more than two slideways 45. The multiple slideways 45 are not connected, and the positions of the slideways 45 on the slideway assembly 4 can be adjusted individually to better adapt to the falling position of the door assembly 1.

[0101] Preferably, the slideway assembly 4 further includes a buffer limiter 46. The buffer limiter 46 is arranged at one end of the groove and is at the end point of the downward movement of the door assembly 1. The buffer limiter 46 provides buffering and limiting for the door assembly 1 to prevent the door assembly 1 from hitting the hot forming machine 7 or preventing the door assembly 1 from hitting the slideway 45.

[0102] Preferably, the door device of the present invention includes a safety protection mechanism. The safety protection mechanism includes a safety bolt 5 and a slow descent mechanism 6.

[0103] Preferably, as Figure 6 shown, the safety bolt 5 includes a power cylinder 51, a guide sleeve 52 and a bolt 53. The safety bolt 5 is arranged at one end of the guide post 31.

[0104] Preferably, the power cylinder 51 is connected to the bolt 53. The bolt 53 is arranged in the guide sleeve 52, and the power cylinder 51 and the guide sleeve 52 are respectively connected to the guide post 31.

[0105] Preferably, the power cylinder 51 can be telescopic, can push and pull the bolt 53, so that the bolt 53 moves in the guide sleeve 52. The bolt 53 can extend from one end of the guide sleeve 52 and can also be retracted into the guide sleeve 52.

[0106] Preferably, the power cylinder 51 is a hydraulic cylinder, an electric cylinder or a pneumatic cylinder, which can be selected according to the actual situation.

[0107] Preferably, as Figure 3 shown, the door assembly 1 further includes a hanging ring 14, and the hanging ring 14 is arranged at one end of the door body 11. The hanging ring 14 includes a hollow portion.

[0108] Preferably, as Figure 2 shown, when the door assembly 1 is stretched to the fully open state by the lifting mechanism 2, the power cylinder 51 pushes the bolt 53, so that the bolt 53 extends out of the guide sleeve 52 until the bolt 53 is inserted into the hollow portion of the hanging ring 14.

[0109] Compared with the prior art, the safety bolt 5 of the present invention can complete the hanging of the door assembly 1, thereby preventing the door assembly from falling off and reducing the scale of the accident, so as to avoid personal injury and property loss.

[0110] Preferably, as Figure 8 shown, the slow descent mechanism 6 includes a sleeve 61, a piston 62, a damping liquid pipe 63, a liquid reservoir 64 and damping liquid (not shown in the figure).

[0111] Preferably, the piston 62 is arranged in the sleeve 61, the piston 62 can slide in the sleeve 61, the damping liquid pipe 63 is arranged at one end of the sleeve 61, the damping liquid pipe 63 is connected to the liquid reservoir 64, and damping liquid is provided between the sleeve 61 and the piston 62, in the damping liquid pipe 63 and in the liquid reservoir 64. When the piston 62 slides out of the sleeve 61, the damping liquid stored in the liquid reservoir 64 can be pumped into the space between the sleeve 61 and the piston 62 through the damping liquid pipe 63. When the piston 62 slides into the sleeve 61, the damping liquid in the sleeve 61 can be discharged into the liquid reservoir 64 through the damping liquid pipe 63.

[0112] Preferably, a sealing sleeve (not shown in the figure) is provided between the sleeve 61 and the piston 62. The sealing sleeve can ensure close contact between the sleeve 61 and the piston 62, prevent air from entering the sleeve 61 through the gap between the sleeve 61 and the piston 62, and ensure that the damping liquid pipe 63 is the only path for liquid transfer between the sleeve 61 and the outside world.

[0113] Preferably, the slow descent mechanism 6 further includes a first regulating valve 65 and a second regulating valve 66. The first regulating valve 65 is respectively connected to the damping liquid pipe 63 and the sleeve 61. The first regulating valve 65 can open and close the damping liquid pipe 63. When the first regulating valve 65 closes the damping liquid pipe 63, the piston 62 cannot slide in the sleeve 61. The second regulating valve 66 is arranged at one end of the liquid reservoir 64. The second regulating valve 66 can open and close the passage for gas exchange between the liquid reservoir 64 and the outside world, and at the same time regulate the flow rate of air in and out to balance the air pressure inside and outside the liquid reservoir 64, ensuring smooth flow of the damping liquid.

[0114] Preferably, the first regulating valve 65 is a valve, and the first regulating valve 65 can adjust the maximum flow rate of the damping liquid passing through the damping liquid pipe 63 to control the maximum flow rate of the liquid input and discharged from the sleeve 61 per unit time, thereby controlling the speed at which the piston 62 slides into and out of the sleeve 61.

[0115] Preferably, the sleeve 61 is provided with a first connecting rod 67, and the first connecting rod 67 is connected to the hot forming machine 7.

[0116] Preferably, the piston 62 is provided with a second connecting rod 68, and the second connecting rod 68 is connected to the door body 11.

[0117] Preferably, universal joints 69 are provided between the sleeve 61 and the first connecting rod 67 and between the piston 62 and the second connecting rod 68. The universal joints 69 allow for errors when the slow descent mechanism 6 is connected to the hot forming machine 7 and the door body 11, making the connection between the slow descent mechanism 6 and the hot forming machine 7 and the door body 11 more flexible.

[0118] When the door assembly 1 is stretched to the fully open state by the lifting mechanism 2, the piston 62 is pulled out of the sleeve 61. When the door assembly 1 moves downward to perform the closing action, the piston 62 slides into the sleeve 61. If the door assembly 1 is detached from the lifting mechanism 2 accidentally and drops downward when the door assembly 1 is in the fully open state or when the door assembly 1 is moving downward, the piston 62 is pressed by the gravity of the door assembly 1 and slides into the sleeve 61. Since the first regulating valve 65 sets the maximum flow rate when the damping liquid is discharged, the speed at which the piston 62 slides into the sleeve 61 is also limited, preventing the door assembly 1 from falling freely.

[0119] Preferably, the first regulating valve 65 is arranged on the sleeve 61, and the first regulating valve 65 can adjust the damping of the slow descent mechanism 6. The speed adjustment range when the door assembly 1 accidentally falls is 1 cm - 10 cm / s.

[0120] Compared with the prior art, the slow descent device of this embodiment can limit the speed at which the piston 62 slides into the sleeve 61. Therefore, it can slow down the falling speed of the door assembly 1 when it accidentally falls, prevent the door assembly 1 from falling freely, ensure that the door assembly 1 will not cause a safety accident due to falling rapidly downward, and guarantee the safety of personnel and equipment.

[0121] Compared with the prior art, the mounting block 22 provided in this embodiment can achieve the position adjustment of the lifting cylinder 21 in six directions: up and down, front and back, and left and right, so as to achieve the position adjustment of the door assembly 1 in six directions: up and down, front and back, and left and right, increasing the compatibility between the door assembly 1 and the hot forming machine 7; by adjusting the length of the support rod 32, the up and down position of the slideway assembly 4 on the bracket 3 can be adjusted, so as to set the height of the slideway assembly 4, and finally the closing height of the door assembly 1 can be set; the door assembly 1 can tilt and fall towards the hot forming machine 7 along the groove, and finally complete the closing action and achieve self-locking due to its own gravity and the downward thrust of the lifting mechanism 2; the safety bolt 5 can hook the door assembly 1 to prevent the door assembly from falling off and dropping, reducing the scale of accidents and avoiding personal injuries and property losses; the slow-down mechanism 6 can slow down the falling speed of the door assembly 1 when it accidentally falls, prevent the door assembly 1 from free-falling, ensure that the door assembly 1 will not cause safety accidents due to rapid downward dropping, and ensure the safety of personnel and equipment.

[0122] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A safety adjustment method for a door device with adjustable closing height, characterized in that, Use a door device with adjustable closing height. The door device with adjustable closing height includes a door assembly (1), a lifting mechanism (2) and a slow-down mechanism (6). The lifting mechanism (2) is arranged on a hot forming machine (7), and the door assembly (1) is connected to the lifting mechanism (2). The slow-down mechanism (6) includes a sleeve (61), a piston (62), a damping liquid pipe (63), a liquid reservoir (64) and damping liquid. The piston (62) is arranged inside the sleeve (61), and the piston (62) can slide inside the sleeve (61). The damping liquid pipe (63) is arranged at one end of the sleeve (61), and the damping liquid pipe (63) is connected to the liquid reservoir (64). Damping liquid is provided between the sleeve (61) and the piston (62), inside the damping liquid pipe (63) and the liquid reservoir (64). The safety adjustment method of the door device with adjustable closing height includes the following steps: Pull up the door assembly (1). Lock the door assembly (1). Detect the state of the door assembly (1). Suspend and repair the door assembly (1). Adjust the closing height of the door assembly (1). Unlock the door assembly (1). Lower and lock the door assembly (1). Slow down and repair the door assembly (1). When the door assembly (1) accidentally detaches from the lifting mechanism (2) and falls, the piston (62) is pressed by the gravity of the door assembly (1) and slides into the sleeve (61). Because the maximum flow rate of the damping liquid during discharge is set, the speed of the piston (62) sliding into the sleeve (61) is limited, preventing the door assembly (1) from free falling. Pull up the door assembly (1), and the adjustment is completed.

2. The safety adjustment method of the door device with adjustable closing height according to claim 1, characterized in that, The pulling up of the door assembly (1) includes: The door assembly (1) is pulled up through the lifting mechanism (2) to complete the lifting action of the door assembly (1). At this time, the pulley (13) is inside the slideway (45).

3. The safety adjustment method of the door device with adjustable closing height according to claim 1, characterized in that, The detection of the state of the door assembly (1) includes: If the state of the door assembly (1) is abnormal or it detaches from the lifting mechanism (2), execute step 4; if the state of the door assembly (1) is normal, execute step 5.

4. The safety adjustment method of the door device with adjustable closing height according to claim 1, characterized in that, The adjustment of the closing height of the door assembly (1) includes sub-steps: Loosen the slideway assembly (4).

5. The safety adjustment method of the door device with adjustable closing height according to claim 4, characterized in that, The loosening of the slideway assembly (4) includes: Unscrew the locking screw (44) from the sliding sleeve (43) to release the connection between the sliding sleeve (43) and the guide post (31), thereby releasing the fixation of the slideway assembly (4), and the slideway assembly (4) can slide on the guide post (31).

6. The safety adjustment method of the door device with adjustable closing height according to claim 1, characterized in that, The unlocking of the door assembly (1) includes: The power cylinder (51) pulls the bolt (53) to make the bolt (53) retract into the guide sleeve (52) until the bolt (53) completely exits from the hollow part of the hanging ring (14), and the safety bolt (5) completes the unlocking of the door assembly (1).

7. The safety adjustment method of the door device with adjustable closing height according to claim 1, characterized in that, The lowering and locking of the door assembly (1) includes: The lifting mechanism (2) extends, pushing the door assembly (1) to tilt and fall downward along the direction of the slideway (45) and then toward the direction of the hot forming machine (7), and finally completes the closing action and realizes self-locking due to its own gravity and the downward thrust of the lifting mechanism (2).

8. The safety adjustment method of the door device with adjustable closing height according to any one of claims 1-7, characterized in that, The described door device with adjustable closing height further includes a bracket (3), a slideway assembly (4), and a safety bolt (5). The bracket (3) is arranged on the hot forming machine (7). The door assembly (1) is connected to the slideway assembly (4), and the slideway assembly (4) and the safety bolt (5) are arranged on the bracket (3).

9. The safety adjustment method of the door device with adjustable closing height according to claim 8, characterized in that, The described slideway assembly (4) includes a sliding sleeve (43) and a locking screw (44).

10. The safety adjustment method of the door device with adjustable closing height according to claim 9, characterized in that, The bracket (3) includes a guide post (31) and a support rod (32).

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