CN217001474U - Multifunctional lifting door - Google Patents

Abstract

The application relates to the technical field of factory building lifting doors, and provides a multifunctional lifting door which comprises a door frame, a door body, a lifting assembly, an anti-falling protection assembly and a buffer device, wherein the door body is arranged in the door frame; the lifting assembly comprises a power mechanism arranged on the door frame and a traction rope, one end of the traction rope is connected with the power mechanism, and the other end of the traction rope is connected with the door body; the anti-falling protection assembly comprises an anti-falling device which is arranged on the door body and connected with the door frame, the traction rope is connected with the anti-falling device, and the anti-falling device is used for lifting the door body to ascend or loosening the door body to descend by utilizing the power mechanism, so that the use and control convenience of the door body are effectively improved; meanwhile, the anti-falling device is arranged on the door body, the traction rope is connected with the anti-falling device, and the anti-falling device is locked on the door frame at the moment when the traction rope is disconnected, so that the door body is locked to prevent the door body from falling, and the safety of the multifunctional lifting door is effectively improved.

Description

Multifunctional lifting door

Technical Field

The utility model relates to the technical field of plant lifting doors, and particularly provides a multifunctional lifting door.

Background

The inlet and outlet of the closed plant equipment are generally arranged in the mid-air of the plant, so that the installation and the overhaul work of high-rise equipment are facilitated. At present, the lifting door with a counterweight block opening and closing mode is generally adopted, and the lifting of the lifting door is realized by controlling the weight of the counterweight block.

However, such liftgates are inconvenient to use, lack fall arrest and cushioning equipment when closed and in operation; in the use process, the risk is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multi-functional lifting door aims at solving current lifting door and adopts the balancing weight to open and close, and lacks the protection of preventing weighing down, leads to using inconvenient, the big problem of risk.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

the embodiment of the application provides a multifunctional lifting door which comprises a door frame, a door body, a lifting assembly, an anti-falling protection assembly and a buffer device, wherein the door body is arranged in the door frame; the lifting assembly comprises a power mechanism arranged on the door frame and a traction rope, one end of the traction rope is connected with the power mechanism, and the other end of the traction rope is connected with the door body; the anti-falling protection assembly comprises an anti-falling device which is arranged on the door body and connected with the door frame, and the traction rope is connected with the anti-falling device.

The beneficial effects of the embodiment of the application are as follows: according to the multifunctional lifting door provided by the embodiment of the application, the power mechanism arranged on the door frame is used for lifting or releasing the traction rope, so that the action of lifting the door body or releasing the door body to descend is realized, the door body is in an opening state or a closing state, and the use and control convenience of the door body is effectively improved; meanwhile, the anti-falling device is arranged on the door body, the traction rope is connected with the anti-falling device, and the anti-falling device is locked on the door frame at the moment when the traction rope is disconnected, so that the door body is locked to prevent the door body from falling, and the safety of the multifunctional lifting door is effectively improved.

In one embodiment, the buffer device is arranged at the bottom of the door body.

Through adopting foretell technical scheme, still set up buffer in the bottom of the door body, accessible buffer provides the buffering shock attenuation when the door body descends to the bottom, avoids the door body to take place the hard contact and lead to damaging.

In one embodiment, the power mechanism comprises a driving part, a worm and gear rotating part and a winding drum, wherein the driving part is arranged on the door frame; the input end of the worm gear and worm rotating member is connected with the output end of the driving member; the output shaft of the worm gear and worm rotating part is connected to the rotating shaft of the winding drum, and the traction rope is wound on the winding drum.

By adopting the technical scheme, the driving piece is used for controlling the input end of the worm gear rod piece to rotate, and the output end is used for controlling the winding drum to rotate after the rotation direction is changed through the worm gear rod piece, so that the winding drum winds the traction rope to lift the door body or loosen the traction rope to lower the door body.

In one embodiment, the driving member is disposed on a bottom side of the door frame, and the lifting assembly further includes a reversing pulley disposed on a top side of the door frame, and the traction rope is wound around the reversing pulley.

By adopting the technical scheme, the driving piece is arranged at the bottom of the door frame, so that maintenance operation of an operator is facilitated, and the operator can operate by standing at the bottom of the door frame; the top side of the door frame is provided with the reversing pulley, and the traction rope is wound around the reversing pulley from the driving part at the bottom side and then connected to the door body, so that the driving part can also perform traction operation on the door body at the bottom of the door frame.

In one embodiment, the number of the reversing pulleys is two, and the two sides of the door frame on the door body are provided with the reversing pulleys; the traction rope comprises a first steel wire rope and a second steel wire rope, and the first steel wire rope and the second steel wire rope are wound on the corresponding reversing pulleys and are connected to the falling protector.

By adopting the technical scheme, the two sides of the door body on the door frame are respectively provided with the reversing pulleys, the traction rope adopts the two steel wire ropes, the first steel wire rope and the second steel wire rope are wound on the corresponding reversing pulleys and connected to the door body, so that the two steel wire ropes simultaneously pull the door body, and the operation of the door body is more stable.

In one embodiment, the first and/or second wire rope has a turn-buckle construction.

By adopting the technical scheme, the first steel wire rope and/or the second steel wire rope are/is provided with the turn-buckle structure, and the length of the first steel wire rope and/or the second steel wire rope can be adjusted by utilizing the turn-buckle structure so as to adjust the balance of the door body.

In one embodiment, the worm gear and worm rotating member comprises a worm with one end connected with the driving member and a worm gear meshed with the worm, and the other end of the worm is provided with a connecting port for connecting the handle.

By adopting the technical scheme, the worm is connected with the driving piece and is driven to rotate so as to control the worm wheel to rotate, so that the worm wheel can drive the connected winding drum to rotate; meanwhile, a connecting port is further formed in the worm so that the worm can be conveniently connected with a handle to perform manual control under special conditions.

In one embodiment, the multifunctional lifting door further comprises an inspection structure, wherein the inspection structure comprises a ladder stand arranged on the door frame and a platform arranged on the top of the door frame and connected with the ladder stand.

Through adopting foretell technical scheme, through set up cat ladder and platform on the door frame, the accessible cat ladder climbs the platform during maintenance to overhigh overhauls, improved the maintenance convenience effectively, can directly utilize the maintenance structure on the door frame can assist the maintenance, and need not use other equipment to remove to the eminence.

In one embodiment, the anti-falling protection assembly further comprises two groups of electric protection structures, wherein one group of electric protection structures is used for limiting the opening state of the door body, and the other group of electric protection structures is used for limiting the closing state of the door body; the electric protection structure comprises a limit switch, a fire breaking switch and a hard contact limiting part which are arranged on the door frame, and the limit switch and the fire breaking switch are electrically connected with the driving part; one group of electric protection structures are sequentially provided with a limit switch, a fire breaking switch and a hard contact limiting part along the opening direction of the door body, and the other group of electric protection structures are sequentially provided with a limit switch, a fire breaking switch and a hard contact limiting part along the closing direction of the door body.

Through adopting foretell technical scheme, adopt two sets of electrical protection structure to carry on spacingly to the state of opening and the closed condition of the door body respectively, electrical protection structure guarantees spacing effect through triple guarantee including the limit switch, the switch of cutting off the fire and the locating part that contacts firmly that set gradually.

In one embodiment, a guide groove is formed in the door frame along the movement direction of the door body, a guide block which is in sliding fit with the guide groove is arranged on the door body, and the guide block is inserted into the guide groove.

Through adopting foretell technical scheme, utilize the cooperation of guide slot and guide block, the door body can be at the within range of door frame and lead to the removal, has promoted the operation stationarity of the door body effectively.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a multifunctional lift gate according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic structural diagram of a door body provided in an embodiment of the present application;

fig. 4 is a schematic cross-sectional view of a door body provided in an embodiment of the present application.

Wherein, in the figures, the various reference numbers:

100. a multifunctional lift gate; 10. a door frame; 20. a door body; 21. a frame; 22. a sandwich panel; 23. a guide block; 30. a lifting assembly; 31. a power mechanism; 311. a drive member; 312. a worm gear rotating member; 313. a reel; 32. a hauling rope; 33. a diverting pulley; 40. a fall arrest protection assembly; 41. a safety catch; 50. a buffer device; 60. overhauling the structure; 61. climbing a ladder; 62. a platform.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The inlet and outlet of the closed plant equipment generally adopt a lifting door with a counterweight block opening and closing mode, and the lifting of the lifting door is realized by controlling the weight of the counterweight block. However, such liftgates are inconvenient to use, lack fall arrest and cushioning equipment when closed and in operation; in the use process, the risk is large.

From this, this application provides a multi-functional lifting door, utilizes the lifting unit to control opening and closing of the door body, and increases and prevents weighing down protection component and buffer, can lock when the door body will take place to fall, has promoted the security effectively, and buffer can avoid the hard contact of the door body and bottom to the protection door body.

Referring to fig. 1 to 3, the present application provides a multifunctional lifting door 100, which includes a door frame 10, a door body 20, a lifting assembly 30, an anti-falling protection assembly 40, and a buffer device 50, wherein the door body 20 is disposed in the door frame 10; the lifting assembly 30 comprises a power mechanism 31 arranged on the door frame 10 and a pulling rope 32 with one end connected with the power mechanism 31 and the other end connected with the door body 20, wherein the power mechanism 31 is used for pulling or releasing the pulling rope 32 so as to enable the door body 20 to be in an opening state or a closing state; the anti-falling protection assembly 40 comprises an anti-falling device 41 which is arranged on the door body 20 and connected with the door frame 10, and the traction rope 32 is connected with the anti-falling device 41.

Specifically, the door frame 10 includes at least a left frame and a right frame disposed opposite to each other, and the door body 20 is disposed between the left frame and the right frame and moves up and down in the height direction. The power mechanism 31 is attached to the left or right frame, and lifts or lowers the door body 20 by pulling or releasing the pulling rope 32. The falling protector 41 can be a common eccentric wheel instant falling protector 41, the number of the falling protectors 41 is generally two, the falling protectors face the left frame body and the right frame body respectively and are installed on two sides of the door body 20, and the falling brake of the door body 20 is realized when the traction rope 32 is broken by utilizing a differential principle. The haulage rope 32 connects the safety hook 41 to the safety hook 41 receives the dead weight of the door body 20 and makes its two eccentric wheels correspond the door frame 10 of one side with the back of the body in order to open, when haulage rope 32 splits, the safety hook 41 loses the pulling force of haulage rope 32, thereby the dead weight of the door body 20 also disappears to its pulling force, under the effect of the inside spring of safety hook 41, two eccentric wheels are closed and press from both sides tightly gradually towards the door frame 10 that corresponds one side, so that the door body 20 locks on the door frame 10, realize the effect of preventing weighing down.

According to the multifunctional lifting door 100 provided by the embodiment of the application, the power mechanism 31 arranged on the door frame 10 is used for lifting or releasing the traction rope 32, so that the action of lifting the door body 20 or releasing the door body 20 to descend is realized, the door body 20 is in an opening state or a closing state, and the use and control convenience of the door body 20 is effectively improved; meanwhile, the falling protector 41 is arranged on the door body 20, the traction rope 32 is connected with the falling protector 41, and when the traction rope 32 is disconnected, the falling protector 41 is locked on the doorframe 10, so that the door body 20 is locked to prevent the falling, and the safety of the multifunctional lifting door 100 is effectively improved.

Referring to fig. 1 to 3, in an embodiment, the buffering device 50 is disposed at a bottom of the door body 20. The bottom of the door body 20 is further provided with the buffer device 50, and when the door body 20 falls to the bottom, the buffer device 50 can provide buffer shock absorption, so that the door body 20 is prevented from being damaged due to hard contact. The buffering device 50 is a soft material disposed at the bottom of the door body 20, such as a rubber layer, a silica gel layer, a plastic layer, etc., the buffering device 50 in this embodiment employs a rubber cushion pad, and utilizes a rubber long-chain molecular structure and a weak secondary force between molecules to make the rubber material exhibit unique viscoelastic performance, thereby having good shock absorption, sound insulation and buffering performances. The buffering device 50 may be disposed at a bottom of the door body 20 facing the door frame 10, and the door frame 10 is provided with a contact point matched with the buffering device 50, so that when the door body 20 falls to the bottom, the buffering device 50 may collide with the contact point to provide buffering.

Referring to fig. 1 to 3, in one embodiment, the power mechanism 31 includes a driving element 311, a worm and gear rotating element 312 and a winding drum 313, wherein the driving element 311 is disposed on the doorframe 10; the input end of the worm and gear rotating member 312 is connected with the output end of the driving member 311; the output shaft of the worm gear rotating member 312 is connected to the rotating shaft of the spool 313, and the traction rope 32 is wound on the spool 313. The driving part 311 is installed on the door frame 10, the driving part 311 controls the input end of the worm and gear rotating part 312 to rotate, so that the worm and gear rotating part 312 controls the winding drum 313 to rotate through the output end, the winding drum 313 can rotate to wind the traction rope 32, the effect of lifting the door body 20 to be lifted is achieved, or the winding drum 313 rotates to loosen the traction rope 32, and the effect of lowering the door body 20 is achieved. Wherein, use worm gear revolving part 312 to connect driving piece 311 and reel 313, worm gear revolving part 312 possesses the ability of auto-lock, and driving piece 311 can adopt gear motor to be provided with the fixed pulley so that the switching-over of haulage rope 32 on the top of door frame 10, thereby set up gear motor and can realize the operation to the promotion or the decline of door body 20 in the top and the bottom of door frame 10.

Referring to fig. 1 to 3, in one embodiment, the driving member 311 is disposed at a bottom side of the doorframe 10, the lifting assembly 30 further includes a diverting pulley 33 disposed at a top side of the doorframe 10, and the traction rope 32 is wound around the diverting pulley 33. The driving member 311 is disposed at the bottom of the door frame 10, so that the maintenance operation of the operator can be facilitated, and the operator can perform the operation while standing at the bottom of the door frame 10; the reversing pulley 33 is arranged on the top side of the doorframe 10, and the traction rope 32 is wound from the driving piece 311 on the bottom side through the reversing pulley 33 and then connected to the door body 20, so that the driving piece 311 can also perform traction operation on the door body 20 at the bottom of the doorframe 10.

Referring to fig. 1 to 3, in an embodiment, the number of the diverting pulleys 33 is two, and the diverting pulleys 33 are disposed on both sides of the door body 20 of the door frame 10; the hauling cable 32 comprises a first steel cable and a second steel cable, and the first steel cable and the second steel cable are wound on the corresponding reversing pulleys 33 and are connected with the falling protector 41 of the door body 20. One ends of the first steel wire rope and the second steel wire rope are wound on the winding drum 313, the first steel wire rope is wound on one reversing pulley 33 and connected to one falling protector 41 on the door body 20, and the second steel wire rope is wound on the other reversing pulley 33 and connected to the other falling protector 41 on the door body 20, so that the first steel wire rope and the second steel wire rope can synchronously lift or lower the door body 20 in the winding process of the winding drum 313, and the running stability of the door body 20 is effectively improved.

Referring to fig. 1 to 3, in one embodiment, the first steel wire rope and/or the second steel wire rope has a turn-buckle structure. The first steel wire rope and/or the second steel wire rope are/is provided with a basket bolt structure, and the basket bolt structure can be used for adjusting the length of the first steel wire rope and/or the second steel wire rope so as to adjust the balance of the door body 20. In this embodiment, the basket bolt structure is disposed on the first steel wire rope, and the basket bolt structure is utilized to adjust the length of the first steel wire rope, so that the heights of the door body 20 lifted by the first steel wire rope and the second steel wire rope are the same, and the door body 20 is kept balanced.

Referring to fig. 1 to 3, in one embodiment, the worm and gear rotating member 312 includes a worm having one end connected to the driving member 311, and a worm wheel engaged with the worm, and the other end of the worm is formed with a connection port for connecting a handle. The worm is connected with the driving piece 311, and is driven to rotate to control the worm wheel to rotate, so that the worm wheel can drive the connected winding drum 313 to rotate; meanwhile, the worm is also provided with a connecting port so as to be conveniently connected with the handle to perform manual control under other special conditions such as power failure or driving part 311 failure, and the like, so as to ensure the opening or closing action of the door body 20.

Referring to fig. 1, in one embodiment, the multifunctional lifting door 100 further includes an access structure 60, wherein the access structure 60 includes a ladder stand 61 disposed on the door frame 10, and a platform 62 disposed on the top of the door frame 10 and connected to the ladder stand 61. Through set up cat ladder 61 and platform 62 on door frame 10, platform 62 is stepped on to accessible cat ladder 61 during the maintenance to overhaul the eminence, improved the maintenance convenience effectively, can directly utilize maintenance structure 60 on the door frame 10 can assist the maintenance, and need not use other equipment to remove to the eminence.

In one embodiment, the anti-falling protection assembly 40 further comprises two groups of electrical protection structures, one group of electrical protection structures is used for limiting the opening state of the door body 20, and the other group of electrical protection structures is used for limiting the closing state of the door body 20; the electrical protection structure comprises a limit switch, a cutoff switch and a hard contact limiting part which are arranged on the door frame 10, and the limit switch and the cutoff switch are both electrically connected with the driving part 311. The group of electric protection structures are sequentially provided with a limit switch, a fire breaking switch and a hard contact limiting piece along the opening direction of the door body 20, when the door body 20 reaches the limit switch, the limit switch sends a signal to control the driving piece 311 to stop working so as to stop the movement of the door body 20, if the limit switch fails, the door body 20 continues to move to the fire breaking switch, the fire breaking switch controls the driving piece 311 to cut off the power so as to stop the movement of the door body 20, and if the fire breaking switch still fails, the door body 20 continues to move and collides with the hard contact limiting piece to stop so as to guarantee the stop of the door body 20. The other group of electric protection structures is sequentially provided with a limit switch, a fire breaking switch and a hard contact limiting part along the closing direction of the door body 20, and similarly, the door body 20 is sequentially limited by the limit switch, the fire breaking switch and the hard contact limiting part to ensure the stop of the door body when moving along the closing direction. It can be understood that, in order to protect the multifunctional lift gate 100 from being damaged, the buffering device 50 is provided on the hard contact switch so that the door body 20 has a buffering function when the hard contact switch collides. Wherein, the buffer device 50 can be a rubber pad. The limit switch is selected according to underwater operation standards, and can meet the working requirements in severe weather. Because the limit switch and the door body 20 are in linkage relation, if the door body 20 cannot move due to failure of the limit switch, the door body 20 can move by shielding the limit signal, and the limit switch is processed after work is finished.

In practical operation, since the multifunctional lifting door 100 is located at high altitude, a split door is generally further provided below the door body 20. In order to ensure the safety, the closing state of the side-by-side door at the lower part and the limit switch are linked, when the side-by-side door is closed, the long rod pin of the side-by-side door is inserted downwards to be inserted into the fixed position for locking, the side-by-side door cannot be opened, and the multifunctional lifting door 100 can normally operate. After the multifunctional lifting door 100 finishes the action, the long rod pin of the split door can be pulled upwards, the split door is unlocked and can be opened, the limit switch is triggered when the long rod pin is pulled out, and the driving piece 311 of the multifunctional lifting door 100 is in a power-off state and cannot run, so that the safety is effectively ensured. Meanwhile, in order to further ensure the safety of the field operation, the multifunctional lift gate 100 may be interlocked with the side-by-side door and the field crane, and the multifunctional lift gate 100 may be powered on only when the crane is parked at the parking position of the operating room. The control circuit of the multifunctional lifting door 100 can be installed in a control cabinet, the control cabinet is arranged on a 20-meter platform 62, the height of the control cabinet is about 1.2 meters above the ground, open-phase protection, overcurrent protection, overheat protection, voltage loss protection and the like are arranged, and a fault signal alarm is further arranged. The control cabinet protection grade requires IP55 (can prevent harmful dust from piling up, and the water is washed and is not had any injury, and waterproof dirt resistance is good, is applicable to the humid environment in sea), and when control and signal device were put on the panel of case, the panel adopted transparent material's door shield to protect, and the fire prevention grade of the used material of transparent door shield is M2 level. The wiring in the box adopts a flame-retardant wire; the cable is made of low-smoke halogen-free flame retardant materials, 1E-level K3 cables are laid through a pipe, and therefore the problem of the circuit caused by mechanical damage, sunlight, rain and snow weather and the like is solved.

Referring to fig. 1 to 4, in an embodiment, the door body 20 includes a frame 21, a sandwich panel 22 disposed on the frame 21, and a covering edge covering an outer edge of the sandwich panel 22. The frame 21 is made of steel, the sandwich board 22 is installed on the frame 21 by stainless steel self-tapping screws, and the edge of the sandwich board 22 is covered by stainless steel; the joints between the sandwich panel 22 and the frame 21 and between the sandwich panel and the tapping screws are treated with silicone adhesive for water proofing, so that the door body 20 has the advantages of light weight, heat preservation, corrosion resistance and strength meeting the requirements.

Referring to fig. 1 to 3, in an embodiment, a guide groove is formed on the door frame 10 along a moving direction of the door body 20, a guide block 23 slidably engaged with the guide groove is disposed on the door body 20, and the guide block 23 is inserted into the guide groove. By means of the matching of the guide groove and the guide block 23, the door body 20 can move in a guide mode within the range of the door frame 10, and the operation stability of the door body 20 is effectively improved.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (10)

1. A multi-functional lift gate, comprising:

a door frame;

the door body is arranged in the door frame;

the lifting assembly comprises a power mechanism arranged on the door frame and a traction rope, one end of the traction rope is connected with the power mechanism, the other end of the traction rope is connected with the door body, and the power mechanism is used for pulling or releasing the traction rope so as to enable the door body to be in an opening state or a closing state;

prevent weighing down the protection subassembly, prevent weighing down the protection subassembly including set up in on the door body and connect the safety hook of door frame, the haulage rope is connected the safety hook.

2. The multi-functional lift gate of claim 1, further comprising:

and the buffer device is arranged at the bottom of the door body.

3. The multi-functional lift gate of claim 1, wherein the power mechanism comprises:

the driving piece is arranged on the door frame;

the input end of the worm gear and worm rotation piece is connected with the output end of the driving piece;

the output shaft of the worm and gear rotating part is connected to the rotating shaft of the winding drum, and the traction rope is wound on the winding drum.

4. The multi-functional lift gate of claim 3, wherein: the driving piece is arranged on the bottom side of the door frame, the lifting assembly further comprises a reversing pulley arranged on the top side of the door frame, and the traction rope is wound on the reversing pulley.

5. The multi-functional lift gate of claim 4, wherein: the number of the reversing pulleys is two, and the reversing pulleys are arranged on the two sides of the door body of the door frame; the traction rope comprises a first steel wire rope and a second steel wire rope, and the first steel wire rope and the second steel wire rope are wound on the corresponding reversing pulleys and are connected to the falling protector.

6. The multi-functional lift gate of claim 5, wherein: the first and/or second wire rope has a turn-buckle structure.

7. The multi-functional lift gate of claim 3, wherein: the worm and gear rotating part comprises a worm with one end connected with the driving part and a worm gear meshed with the worm, and a connecting port used for connecting a handle is formed at the other end of the worm.

8. The multi-function lift gate of claim 3, wherein the fall arrest protection assembly further comprises:

the number of the electric protection structures is two, one group of the electric protection structures is used for limiting the opening state of the door body, and the other group of the electric protection structures is used for limiting the closing state of the door body; the electric protection structure comprises a limit switch, a fire breaking switch and a hard contact limiting part which are arranged on the door frame, and the limit switch and the fire breaking switch are both electrically connected with the driving part; a set of electric protection structure follows the direction of opening of the door body sets gradually limit switch the switch of making a fire absolutely with the locating part of hard contact, another group electric protection structure follows the direction of closing of the door body sets gradually limit switch the switch of making a fire absolutely with the locating part of hard contact.

9. The multi-functional lift gate of any one of claims 1 to 8, further comprising:

the overhaul structure, overhaul the structure including set up in cat ladder on the door frame, and set up in the door frame top and with the platform that the cat ladder is connected.

10. The multifunctional lifting door according to any one of claims 1 to 8, wherein a guide groove is formed in the door frame along the moving direction of the door body, a guide block which is in sliding fit with the guide groove is arranged on the door body, and the guide block is inserted into the guide groove.

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