Tower drum elevator

Abstract

The present application relates to the technical field of lifting equipment, and provides a tower drum elevator.The tower drum elevator comprises an elevator body and a motor, the motor is used for driving the elevator body to lift, a brake releasing device is arranged on the elevator body, a lower profile assembly is arranged below the elevator body and can move upward under the impact of an obstacle, and the lower profile assembly is arranged in linkage with the brake releasing device;in the case that the lower profile assembly is in a lower limit position, the brake releasing device is connected in linkage with a brake of the motor;in the case that the lower profile assembly is between the lower limit position and the elevator body, the brake releasing device is disconnected from the linkage with the brake.The tower drum elevator limits the manual brake releasing operation through the linkage control of the brake releasing device by the lower profile assembly, avoids the collision between the elevator body and the climbers below during the manual lowering process, and improves the safety of the tower drum elevator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting equipment, and in particular to a tower drum lifter. BACKGROUND

[0002] Currently, the guide forms of the wind power tower drum lifter generally have two forms of steel wire rope guide and ladder guide. For the ladder guide lifter, during the operation of the lifter, a staff may climb the ladder directly below the lifter, and the operator in the car of the lifter cannot identify the position of the climbing staff, and thus cannot brake the lifter in time, which may cause a safety accident.

[0003] In the related art, during the descending process of the lifter, the lower contour assembly at the bottom of the lifter can touch the climbing staff to trigger the limit switch on the lower contour assembly to cut off the descending operation control loop of the lifter, and thus control the lifter to stop descending. However, when the lifter is powered off, the operator in the car adopts the manual brake release mode to descend the lifter, and even if the lower contour assembly of the lifter touches the climbing staff, the lifter cannot be prevented from descending, and a safety accident is still likely to occur. SUMMARY

[0004] The present application provides a tower drum lifter to solve the problem that the tower drum lifter in the prior art cannot trigger the control of the lifter to stop descending through the touch of the lower contour assembly and the climbing staff in the manual brake release working condition, and cause a safety accident.

[0005] The present application provides a tower drum lifter, comprising:

[0006] A lifter body and a motor, wherein the motor is used to drive the lifter body to lift;

[0007] A brake release device arranged on the lifter body;

[0008] A lower contour assembly arranged below the lifter body and capable of moving upward under the impact of an obstacle, wherein the lower contour assembly is arranged in linkage with the brake release device;

[0009] In the case that the lower contour assembly is in a lower limit position, the brake release device is connected in linkage with a brake of the motor; and in the case that the lower contour assembly is between the lower limit position and the lifter body, the brake release device is disconnected from the linkage with the brake.

[0010] The tower drum elevator provided by the application has a brake releasing device connected with the lower profile assembly, and the brake releasing device is connected with the brake of the motor when the lower profile assembly is at the lower limit position, so that the operator in the elevator body can manually release the brake through the brake releasing device. When the lower profile assembly is impacted and moves upward, the brake releasing device is disconnected with the brake of the motor, so that the manual brake releasing operation of the operator is invalid. The embodiment of the application limits the manual brake releasing operation through the linkage control of the brake releasing device by the lower profile assembly, avoids the impact between the elevator body and the climbers below during the manual descending process, and improves the safety of the tower drum elevator. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0012] Figure 1 is one of the structural schematic diagrams of the tower drum elevator provided by the application;

[0013] Figure 2 is another structural schematic diagram of the tower drum elevator provided by the application;

[0014] Figure 3 is a connection relationship schematic diagram of the driving device and the brake releasing device in the tower drum elevator provided by the application;

[0015] Figure 4 is a connection relationship schematic diagram of the brake releasing device and the lower profile assembly in the tower drum elevator provided by the application;

[0016] Figure 5 is a schematic diagram of the swing arm assembly and the force applying assembly in the separated state in the tower drum elevator provided by the application;

[0017] Figure 6 is one of the structural schematic diagrams of the anti-collision device in the tower drum elevator provided by the application;

[0018] Figure 7 is a connection relationship schematic diagram of the anti-collision device and the support mechanism in the tower drum elevator provided by the application;

[0019] Figure 8 is Figure 1 is an enlarged view of A part shown in the figure;

[0020] Figure 9 is another structural schematic diagram of the anti-collision device in the tower drum elevator provided by the application;

[0021] Figure 10 Figure 5 is a schematic view of the connection relationship between the guardrail and the third trigger in the tower hoist provided by the present application;

[0022] Figure 11 Figure 6 is an enlarged view of the B part shown in Figure 5; Figure 1

[0023] Reference signs:

[0024] 10, ladder; 1, hoist body; 11, car; 111, sliding door; 12, support mechanism; 121, support arm; 1211, support part; 1212, fixed part; 122, guide wheel;

[0025] 2, driving device; 21, motor; 211, brake; 2111, manual release push rod; 22, frequency converter; 23, overload detection device;

[0026] 3, brake releasing device; 31, first mounting member; 311, partition; 312, first containing space; 313, second containing space; 32, swing arm assembly; 321, swing arm; 3211, rolling member; 322, second reset member; 323, pulling member; 324, guide member; 33, force applying assembly; 331, force applying member; 3311, limiting part; 332, first reset member; 34, brake releasing trigger assembly; 341, micro switch; 342, fourth trigger; 3421, first connecting part; 3422, first triggering part; 3423, transition part;

[0027] 4, lower profile assembly; 41, lower profile plate; 42, connecting cloth; 43, lower escape skylight; 44, lower limit switch; 45, lower escape skylight switch; 46, first connecting member;

[0028] 5, anti-collision device; 51, second mounting member; 511, mounting body; 512, first mounting part; 513, second mounting part; 52, first detection switch; 53, first elastic trigger assembly; 531, triggering component; 5311, swing member; 5312, first trigger; 53121, second triggering part; 53122, second connecting part; 5313, second trigger; 532, elastic component; 54, second elastic trigger assembly; 55, brake line;

[0029] 6, pull rope switch assembly; 61, pull rope; 62, pull rope switch;

[0030] 7, guardrail assembly; 71, guardrail; 72, guardrail lock; 73, enclosed space;

[0031] 8, platform trigger assembly; 81, third trigger; 811, first transition surface; 812, triggering surface; 813, second transition surface; 82, second detection switch;​

[0032] 9. brake assembly; 91. first safety lock; 92. second safety lock; 93. brake rope. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions, and advantages of the present application clearer, the following will be combined with the accompanying drawings for the technical solutions in the present application to be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based upon the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall into the scope of protection of the present application.

[0034] In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited, the terms "first", "second" are numbered for the purpose of clearly explaining the components of the product, and do not represent any substantial difference. The directions of "up", "down", "left", "right" are all based on the directions shown in the drawings. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances. In addition, the meaning of "multiple" is two or more than two. In the specification and claims, "and / or" means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0035] In the description of the present application, it should be noted that, unless explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0036] The following will be combined Figures 1-11 The tower drum elevator, the tower drum, and the wind turbine generator set of the present application are described. It should be understood that the following description is only a schematic embodiment of the present application, and does not constitute any limitation on the present application.

[0037] As Figure 1 , Figure 3 and Figure 4As shown, the tower hoist provided by the present application comprises a hoist body 1, a driving device 2, a brake releasing device 3 and a lower profile assembly 4. The driving device 2 comprises a motor 21 for driving the hoist body 1 to ascend or descend. The brake releasing device 3 is arranged on the hoist body 1. The lower profile assembly 4 is connected to the lower part of the hoist body 1 and can move upward under the impact of an obstacle. The brake releasing device 3 is arranged in linkage with the lower profile assembly 4. When the lower profile assembly 4 is in a lower limit position, the brake releasing device 3 is connected in linkage with a brake 211 of the motor 21. When the lower profile assembly 4 is between the lower limit position and the hoist body 1, the brake releasing device 3 is disconnected from the linkage with the brake 211.

[0038] The brake 211 of the motor 21 is a brake 211 of the type of energized electromagnetic attraction and de-energized friction braking, which is provided with a manual release push rod 2111. When the motor 21 is de-energized, the brake 211 is automatically applied. The manual release push rod 2111 of the brake 211 is driven by the brake releasing device 3 to achieve manual brake releasing, so that the hoist body 1 descends.

[0039] It can be understood that the lower profile assembly 4 is connected to the lower part of the hoist body 1 through a flexible member. Under the action of its own gravity, the lower profile assembly 4 is in a lower limit position relative to the hoist body 1. At this time, the brake releasing device 3 is connected in linkage with the brake 211 of the motor 21, so that the brake releasing device 3 can manually release the brake 211 of the motor 21. During the manual descending process of the hoist body 1, when the lower profile assembly 4 is impacted by an obstacle below it, the lower profile assembly 4 moves upward to a position between the lower limit position and the hoist body 1. At this time, the linkage between the brake releasing device 3 and the brake 211 of the motor 21 is disconnected, so that the brake releasing device 3 cannot manually release the brake 211 of the motor 21, and the hoist body 1 stops running.

[0040] The tower hoist provided by the embodiment of the present application is connected in linkage with the brake releasing device 3 through the lower profile assembly 4. When the lower profile assembly 4 is in a lower limit position, the brake releasing device 3 is connected in linkage with the brake 211 of the motor 21, so that the operator in the hoist body 1 can manually release the brake 211 of the motor 21 through the brake releasing device 3. When the lower profile assembly 4 is impacted and moves upward, the linkage between the brake releasing device 3 and the brake 211 of the motor 21 is disconnected, so that the manual brake releasing operation of the brake releasing device 3 by the operator is invalid. The linkage control of the brake releasing device 3 by the lower profile assembly 4 limits the manual brake releasing operation, avoids the hoist body 1 from colliding with a person climbing below during the manual descending process, and improves the safety of the tower hoist.

[0041] Referring to Figure 1 and Figure 4The lower profile assembly 4 comprises a lower profile plate 41, a connecting cloth 42, a lower escape window 43 and a lower limit switch 44. The periphery of the lower profile plate 41 is connected to the bottom of the elevator body 1 through the connecting cloth 42. The lower escape window 43 is hinged to the lower profile plate 41 to open or close the escape exit on the lower profile plate 41. The lower limit switch 44 is arranged on the lower profile plate 41 to detect the lower limit position of the downward stroke of the elevator body 1. The lower profile assembly 4 further comprises a lower escape window switch 45 arranged on the lower profile plate 41 to detect the opening and closing state of the lower escape window 43. When the lower escape window 43 is in the open state, the motor 21 cannot be operated.

[0042] Referring to Figure 4 and Figure 5 , in some embodiments of the present application, the brake releasing device 3 comprises a first mounting member 31, a swing arm assembly 32 and a force applying assembly 33. The first mounting member 31 is connected to the elevator body 1, and the swing arm assembly 32 and the force applying assembly 33 are arranged on the first mounting member 31 respectively. The swing arm assembly 32 is connected to the brake 211, and the force applying assembly 33 is movably arranged. When the lower profile assembly 4 is in the lower limit position, the swing arm assembly 32 abuts against the force applying assembly 33, so that the force applying assembly 33 can drive the brake 211 to release the brake through the swing arm assembly 32. When the lower profile assembly 4 is between the lower limit position and the elevator body 1, the swing arm assembly 32 is separated from the force applying assembly 33.

[0043] When the lower profile assembly 4 is in the lower limit position, as shown in Figure 4 , the swing arm assembly 32 can abut against the force applying assembly 33 to push the swing arm assembly 32 to move synchronously when the force applying assembly 33 moves upward, so that the brake 211 releases the brake.

[0044] When the lower profile assembly 4 is between the lower limit position and the elevator body 1, as shown in Figure 5 , the swing arm assembly 32 is separated from the force applying assembly 33, so that the force applying assembly 33 cannot apply upward pushing force to the swing arm assembly 32.

[0045] In some embodiments of the present application, the first mounting member 31 is provided with a partition plate 311. The force applying assembly 33 comprises a force applying member 331 and a first reset member 332. The force applying member 331 is movably arranged through the partition plate 311, one end of the force applying member 331 is limited on one side of the partition plate 311, and the first reset member 332 is sleeved on the force applying member 331 and located between the other side of the partition plate 311 and the abutting portion on the force applying member 331, for resetting the force applying member 331. In order to realize the abutment between the abutting portion of the force applying member 331 and the first reset member 332, the area of the abutting portion of the force applying member 331 in contact with the first reset member 332 is smaller than the area of the abutting portion, for example, the abutting portion of the force applying member 331 is a ring-shaped protrusion; or the first connecting portion 3421 in the following embodiments is used as the abutting portion of the force applying member 331.

[0046] The force applying member 331 can be a rod or a plate. The force applying member 331 passes through a through hole in the partition plate. A first end of the force applying member 331 is provided with a limiting portion 3311 which is limited on one side of the partition plate 311 to ensure that the force applying member 331 moves along the axial direction of the through hole and cannot be separated from the first mounting member 31, so that the structure is more stable and the operation is more reliable. The first end of the force applying member 331 abuts against the swing arm assembly 32 through the limiting portion 3311. The second end of the force applying member 331 passes out of the first mounting member 31 to provide an upward pushing force for the force applying member 331 by an operator.

[0047] The first reset member 332 is a spring or a spring piece. The spring type first reset member 332 can be sleeved on the force applying member 331. When the force applying member 331 is pushed upward, the force applying member 331 moves upward against the reset force of the first reset member 332 to push the swing arm assembly 32 to move upward, thereby driving the brake 211 to release the brake. When the pushing force on the force applying member 331 is removed, the force applying member 331 moves downward under the action of the first reset member 332 to reset and abut against the partition plate 311, and the brake 211 resumes braking.

[0048] As shown in Figure 4 and Figure 5 , the swing arm assembly 32 and the force applying assembly 33 form a control valve group of the brake 211. The first mounting member 31 serves as a mounting housing of the control valve group for mounting the control valve group of the brake 211 on the elevator body 1. The top of the first mounting member 31 extends outward on both sides to form mounting lugs which are mounted to external components.

[0049] The first mounting member 31 is provided with an accommodation space, and the partition plate 311 is arranged in the accommodation space to divide the interior of the first mounting member 31 into a first accommodation space 312 and a second accommodation space 313. Part of the swing arm assembly 32 is located in the first accommodation space 312, and part of the force applying assembly 33 is located in the second accommodation space 313. By arranging the swing arm assembly 32 and the force applying assembly 33 in different accommodation spaces, the installation and maintenance of the swing arm assembly 32 and the force applying assembly 33 are facilitated, and the structure is simplified, and the independent limiting structure required by the force applying assembly 33 is saved.

[0050] Optionally, the first mounting member 31 includes a mounting body and a movable cover plate which surround to form the accommodation space. The movable cover plate is slidingly arranged on the mounting body to facilitate the maintenance of the swing arm assembly 32 and the force applying assembly 33 located in the accommodation space.

[0051] Referring to Figure 4 and Figure 5In some embodiments of the present invention, the swing arm assembly 32 includes a swing arm 321, a second reset member 322, and a pull member 323. The first end of the swing arm 321 is connected to the manual release push rod 2111 of the brake 211. The second reset member 322 is disposed between the swing arm 321 and the first mounting member 31 for resetting the swing arm 321. The second reset member 322 abuts against the position between the first end and the second end of the swing arm 321. The first end of the pull member 323 is connected to the swing arm 321, and the second end of the pull member 323 is connected to the lower contour assembly 4.

[0052] The tension member 323 is a flexible cable capable of withstanding tension, such as a steel wire rope, hemp rope, or chain. A first connecting member 46 is provided on the lower contour plate 41, and the second end of the tension member 323 is connected to the first connecting member 46. The second reset member 322 is the same as the first reset member 332, both being springs or spring sheets.

[0053] The weight of the lower contour assembly 4 can be transferred to the swing arm 321 through the pulling member 323, so that the swing arm 321 can overcome the elastic effect of the second reset member 322 and be in a balanced state under the action of the pulling member 323 and the second reset member 322. That is, the second end of the swing arm 321 abuts against the force-applying member 331. At this time, it is in a state that can be manually released by the manual release push rod 2111 through the brake release device 3. It can be understood that the pulling member 323 and the second reset member 322 work together to keep the swing arm 321 in a balanced state. If either one changes, the balance state of the swing arm 321 will be broken.

[0054] like Figure 4 As shown, when there are no obstacles below the lower contour assembly 4, it is in its lower limit position. The weight of the lower contour assembly 4 is transmitted to the swing arm 321 through the traction member 323, applying a rightward self-weight pulling force to the swing arm 321. At the same time, the second reset member 322 applies a leftward horizontal force to the swing arm 321 to balance the rightward pulling force of the traction member 323, so that the swing arm 321 is in the first position, that is, the second end of the swing arm 321 abuts against the force-applying member 331, and the swing arm 321 and the force-applying member 331 can be approximately located on the same axis. At this time, pushing the force-applying member 331 upward can deform the first reset member 332. Continuing to push the force-applying member 331 upward can move the swing arm 321 upward, which will push open the manual release push rod 2111, drive the brake 211 to release the brake, and make the elevator body 1 descend under its own weight. Once the upward thrust of the force-applying component 331 is released, the force-applying component 331 will be reset under the action of the first reset component 332, the swing arm 321 will move downward due to its own weight, and the motor 21 will return to the brake-holding state.

[0055] like Figure 4As shown, when there is an obstacle below the lower profile assembly 4, the elevator body 1 continues to move downward and touches the obstacle, the lower profile assembly 4 is lifted by the obstacle, the pulling force applied by the pulling member 323 to the swing arm 321 is reduced or disappears, so that the swing arm 321 is pushed by the second reset member 322 to rotate around the connecting point of the manual release push rod 2111 to the second position, and the second end of the swing arm 321 is separated from the force applying member 331. At this time, even if the force applying member 33 is pushed upward, the force applying member 33 cannot continue to apply upward thrust to the swing arm 321. The manual release push rod 2111 is automatically locked, and the elevator body 1 is quickly stopped to avoid collision between the elevator body 1 and the obstacle, causing an accident, so as to improve the safety of the elevator operation.

[0056] Optionally, the first end of the swing arm 321 is in the shape of a "U", that is, the first end of the swing arm 321 is composed of two oppositely arranged plates, so that the middle of the swing arm 321 is hollow. The first end of the swing arm 321 is connected with a connecting shaft penetrating through the two plates, and the connecting shaft is connected with the manual release push rod 2111. When the swing arm 321 swings, the manual release push rod 2111 can rotate around its axis and remain connected with the swing arm 321.

[0057] In some embodiments of the present application, in order to make the pulling member 323 run more smoothly, a plurality of pulley assemblies can be arranged on the elevator body 1 along the arrangement path of the pulling member 323, and the pulling member 323 is arranged around the pulley assemblies (not shown in the figure).

[0058] The pulley assembly includes a plurality of pulley seats and a plurality of pulleys corresponding to the pulley seats one by one, the pulleys can be fixed on the car 11 of the elevator body 1, the pulleys are rotatably connected to the pulley seats, and the pulling member 323 is arranged around the pulleys. In addition, in order to avoid friction between the end surface of the pulley and the pulley seat, a spacer (not shown in the figure) can be arranged between the pulley and the pulley seat. Of course, a plurality of rollers can also be arranged on the elevator body 1 along the arrangement path of the pulling member 323, and the pulling member 323 can be wound around the rollers.

[0059] In some embodiments of the present application, in order to enable the second reset member 322 to move directionally, a guide member 324 is arranged on the first mounting member 31 and penetrates through the swing arm 321, and the second reset member 322 in the form of a spring is sleeved on the guide member 324. The guide member 324 is used for guiding the movement of the second reset member 322. The guide member 324 penetrates through the avoiding hole on the swing arm 321, so that the swing arm 321 does not interfere with the guide member 324 when swinging.

[0060] In some embodiments of the present application, in order to avoid the second reset member 322 being compressed too much, a limiting sleeve can be sleeved on the guide member 324, and the limiting sleeve is located between the inner wall of the first mounting member 31 and the second reset member 322. The limiting sleeve and the pulling member 323 can make the swing arm assembly 32 be accurately limited to the first position.

[0061] In some embodiments of the present application, in order to reduce the friction between the swing arm 321 and the limiting portion 3311 of the force applying member 331 during the swing of the swing arm 321, the second end of the swing arm 321 is rotatably provided with a rolling member 3211. The rolling member 3211 can convert the sliding friction between the swing arm 321 and the limiting portion 3311 into rolling friction between the rolling member 3211 and the limiting portion 3311. The rolling member 3211 can be a roller, a roller shaft or a bearing.

[0062] As shown in Figure 1 In some embodiments of the present application, the brake releasing device 3 further comprises a brake releasing trigger assembly 34. The brake releasing trigger assembly 34 comprises a micro switch 341 and a fourth trigger member 342 for triggering the micro switch 341. The micro switch 341 is arranged on the moving path of the force applying assembly 33, and the micro switch 341 is connected with the warning device and the timing device respectively, and forms a loop with the standby battery. The fourth trigger member 342 is arranged on the force applying assembly 33. Optionally, the fourth trigger member 342 abuts against the first reset member 332. When the fourth trigger member 342 moves with the force applying assembly 33, the fourth trigger member 342 keeps abutting against the micro switch 341 to keep the triggering action of the micro switch 341, so that the operation is safe and reliable, and the sensitivity is high.

[0063] When the force applying assembly 33 moves upward to drive the fourth trigger member 342 to move upward, the contact (action spring) of the micro switch 341 is triggered from being disconnected to being connected, so that the warning device issues a warning to warn the staff around the operation channel of the lift body 1, and at the same time, the timing device starts timing to obtain the time of the manual descent of the lift body 1. The warning device can be a warning light, a buzzer or a warning device with both a warning light and a buzzer.

[0064] As shown in Figures 7-9 In some embodiments of the present application, the fourth trigger member 342 is provided with a first connecting portion 3421 and a first triggering portion 3422. The first connecting portion 3421 can be installed on the force applying assembly 33 by fasteners such as bolts. The first end of the first triggering portion 3422 is connected to the first connecting portion 3421 and is arranged at an angle with the first connecting portion 3421. The second end of the first triggering portion 3422 extends along the moving path of the force applying assembly 33 and is used to abut against the micro switch 341. The first connecting portion 3421 can be used as the abutting portion of the force applying member 331 to abut against the first reset member 332, so that an additional abutting portion for abutting against the first reset member 332 is not needed.

[0065] The included angle between the first trigger part 3422 and the first connecting part 3421 can be 90°, but not 0° or 180°. That is, the first trigger part 3422 and the first connecting part 3421 are not parallel or coplanar. In other words, the moving paths of the first trigger part 3422 and the force-applying component 33 can be parallel, so that under the action of the force-applying component 33, the first trigger part 3422 can always maintain contact with the contacts of the micro switch 341, thereby ensuring the reliability of the motor brake release assembly.

[0066] In some embodiments of the present invention, to prevent rigid collision when the micro switch 341 abuts against the first trigger portion 3422, a transition portion 3423 is inclinedly provided between the first connecting portion 3421 and the first trigger portion 3422. When the force-applying component 33 moves upward, the contact of the micro switch 341 can gradually move from the transition portion 3423 to the first trigger portion 3422 and abut against the first trigger portion 3422. The transition portion 3423 is provided with an arc transition between the first connecting portion 3421 and the first trigger portion 3422.

[0067] like Figures 6-8 , Figure 6 As shown, in some embodiments of the present invention, the elevator body 1 includes a support mechanism 12, which is adapted to be connected to the ladder 10 via the support mechanism 12. Specifically, the support mechanism 12 includes a support arm 121 and guide wheels 122. The support arm 121 includes a support portion 1211 and a fixing portion 1212. The fixing portion 1212 is connected to the car 11 of the elevator body 1. The guide wheels 122 are mounted on the support portion 1211. The ladder 10 is located between two sets of guide wheels 122 arranged opposite to each other. The guide wheels 122 can rotate flexibly and move up and down relative to the ladder 10, providing guidance for the operation of the elevator body 1.

[0068] During normal ascent and descent of the elevator along the ladder, contact between the upper contour assembly at the top of the elevator and the lower contour assembly 4 at the bottom with the climber can trigger limit switches on the upper and lower contour assemblies 4, thereby cutting off the control circuit of the elevator body 1 and stopping its operation. During manual descent, the lower contour assembly 4 can be linked with the brake release device 3 to disable manual descent, allowing the elevator body 1 to descend. However, when a climber is positioned opposite the elevator body 1 while climbing the ladder, the support mechanism 12 may crush the climber's hands.

[0069] In this regard, some embodiments of the tower hoist provided by the present invention also include an anti-collision device 5. See also Figure 7The anti-collision device 5 comprises a first detection switch 52 and a first elastic trigger assembly 53 connected to the elevator body 1 respectively. The first detection switch 52 is connected to the control circuit of the elevator body 1. The first elastic trigger assembly 53 is located at the front side of the support mechanism 12 at the most front end of the elevator body 1 in the moving direction. The first elastic trigger assembly 53 is configured to act under the touch of the obstacle on the ladder 10 to trigger the first detection switch 52 to act.

[0070] It can be understood that generally, a plurality of support mechanisms 12 are arranged on the elevator body 1 along the moving direction. When the elevator body 1 is descending, the support mechanism 12 at the most front end of the elevator body 1 is the first support mechanism closest to the bottom end of the elevator body 1. When the elevator body 1 is ascending, the support mechanism 12 at the most front end of the elevator body 1 is the second support mechanism closest to the top end of the elevator body 1. The first elastic trigger assembly 53 is arranged between the first support mechanism and the bottom end of the elevator body 1, and / or the first elastic trigger assembly 53 is arranged between the second support mechanism and the top end of the elevator body 1.

[0071] The first elastic trigger assembly 53 and the first detection switch 52 can be arranged in the car 11 of the elevator body 1, or can be arranged in the corresponding support mechanism 12, or one can be arranged in the car 11 and the other can be arranged in the support mechanism 12.

[0072] When there is an obstacle on the ladder 10 in the front moving path of the support mechanism 12, the first elastic trigger assembly 53 first collides with the obstacle, so that the stroke position of the first elastic trigger assembly 53 changes, thereby triggering the first detection switch 52 to make on-off action to cut off the control circuit of the elevator body 1, so that the elevator body 1 stops running.

[0073] The tower drum elevator provided by the embodiment of the application sets the first detection switch 52 and the first elastic trigger assembly 53, and sets the trigger end of the first elastic trigger assembly 53 at the front side of the support mechanism 12 at the most front end of the elevator body 1 in the moving direction. If there is an obstacle in the moving path of the elevator body 1 during the descending or ascending process, the first elastic trigger assembly 53 first collides with the obstacle and triggers the first detection switch 52 to act, so that the elevator body 1 stops running, preventing the safety accidents of collision or crushing of the elevator body 1 to the person on the ladder 10, and improving the safety of the elevator running. The anti-collision device 5 realizes the closed-loop control of the driving system of the elevator body 1, so that the elevator runs more accurately and safely. And after the anti-collision device 5 cooperates with the locking, the elevator body 1 still has a running state, so as to damage the guide rail or the motor 21.

[0074] The first elastic trigger assembly 53 is in abutment with the first detection switch 52, which means that the first elastic trigger assembly 53 is in contact with the first detection switch 52 but does not produce extrusion, or the first elastic trigger assembly 53 has a small gap with the first detection switch 52. When the position of the first elastic trigger assembly 53 changes slightly, the first detection switch 52 can be triggered to have on-off action, so that the elevator body 1 immediately stops running.

[0075] The first detection switch 52 can be a contact type position sensor. The first detection switch 52 is triggered by the change of the stroke position of the first elastic trigger assembly 53 to have contact action, which is converted from a closed state to an open state, thereby cutting off the control loop of the elevator body 1 to control the elevator body 1 to stop running.

[0076] The first elastic trigger assembly 53 is also in abutment with the ladder 10. It can be understood that the first elastic trigger assembly 53 is in contact with the ladder 10 but does not produce extrusion, or the first elastic trigger assembly 53 has a small gap with the ladder 10. When the first elastic trigger assembly 53 is touched by an obstacle, the position stroke position changes, thereby triggering the first detection switch 52 to have on-off action, so that the elevator body 1 immediately stops running.

[0077] As shown in Figure 7 and Figure 6 In some embodiments of the present application, the anti-collision device 5 further comprises a second mounting member 51. The second mounting member 51 is mounted on the elevator body 1, and the first detection switch 52 is mounted on the second mounting member 51. The first elastic trigger assembly 53 comprises a trigger component 531 and an elastic component 532. The trigger component 531 is rotationally connected to the second mounting member 51 and abuts the contact of the first detection switch 52. The elastic component 532 is connected between the trigger component 531 and the second mounting member 51 for resetting the trigger component 531. The elastic component 532 can make the trigger component 531 immediately return to the original position after being hit, so as to facilitate the next anti-collision protection.

[0078] The second mounting member 51 comprises a mounting body 511 and a first mounting portion 512 connected to the mounting body 511. The second mounting member 51 is connected to the elevator body 1 through the first mounting portion 512. The first mounting portion 512 can be mounted on the elevator body 1 by bolts, pins or other fasteners. The first detection switch 52 is fixed to the mounting body 511 and abuts the first elastic trigger assembly 53.

[0079] It should be noted that the first mounting portion 512 can be connected to any component on the elevator body 1 that moves relative to the ladder 10, such as the car 11, or as shown in Figure 7 the first mounting portion 512 is connected to the support mechanism 12.

[0080] It can be understood that the second mounting member 51 is a mounting carrier of the first detection switch 52 and the first elastic trigger assembly 53, which can be a plate-shaped member or a housing. When the second mounting member 51 is a plate-shaped member, the first mounting portion 512 can be formed by bending an end face of the mounting body 511, which is equivalent to that the first mounting portion 512 is integrally formed with the mounting body 511. Of course, the first mounting portion 512 can also be provided independently of the mounting body 511, and the two are fastened and connected by bolts, pins or other fasteners.

[0081] It can be understood that the trigger component 531 provided in the embodiment can be an integral body, which has a trigger body, and a first trigger portion and a second trigger portion connected with the trigger body. The first trigger portion is used to trigger the contact of the first detection switch 52, and the second trigger portion is used to touch the obstacle. The trigger body of the trigger component 531 can be rotatably connected to the second mounting member 51, and after the second trigger portion of the trigger component 531 touches the obstacle, the trigger body rotates around the connecting point of the trigger body and the second mounting member 51, so that the first trigger portion touches the contact of the first detection switch 52 to act.

[0082] As shown in FIGS. 1, 2 and 3, the first detection switch 52 is arranged on the second mounting member 51, and the second mounting member 51 is arranged on the first mounting member 50. Figure 9 and Figure 1 As shown in FIGS. 1, 2 and 3, the first detection switch 52 is arranged on the second mounting member 51, and the second mounting member 51 is arranged on the first mounting member 50.

[0083] It can be understood that the swing member 5311 is equivalent to the trigger body in the above example, the first trigger member 5312 is equivalent to the first trigger portion in the above embodiment, and the second trigger member 5313 is equivalent to the second trigger portion in the above embodiment. After the second trigger member 5313 collides with the obstacle, the swing member 5311 rotates around the connecting point of the swing member 5311 and the second mounting member 51, so that the first trigger member 5312 touches the contact of the first detection switch 52 to act.

[0084] In some embodiments of the present application, the first trigger 5312 comprises a second trigger portion 53121 and a second connecting portion 53122. The second trigger portion 53121 is adapted to abut against the contact of the first detection switch 52, and the second connecting portion 53122 is connected with the second trigger 5313 and the swing member 5311 respectively. In addition, a spacer is arranged between the swing member 5311 and the second mounting member 51, so that there is a gap between the swing member 5311 and the second mounting member 51, facilitating the rotation of the swing member 5311 around the connecting position of the second mounting member 51.

[0085] For example, when the second trigger 5313 collides with an obstacle while the elevator body 1 is running downward along the ladder, the swing member 5311 swings upward, the first trigger 5312 moves upward accordingly, the first detection switch 52 is triggered to act, and the elevator body 1 stops running quickly. When the obstacle is removed, the swing member 5311 is first reset under the resetting action of the elastic member 532, and the swing member 5311, the second trigger 5313 and the first trigger 5312 are reset under the double action of the elastic member 532 and gravity.

[0086] In assembling the anti-collision device 5, the first detection switch 52 is first fixed on the second mounting member 51, then the swing member 5311 is bolted on the second mounting member 51, and the spacer is arranged between the swing member 5311 and the second mounting member 51, so that the swing member 5311 can swing around the connecting point. Then the first trigger 5312 is connected to the swing member 5311, and the second trigger 5313 is connected to the first trigger 5312 to form the anti-collision device 5, and finally the second mounting member 51 is bolted on the car 11 and / or the support arm 121.

[0087] It can be understood that the first trigger 5312 can be integrally formed. In order to facilitate the processing of each part of the first trigger 5312, the first trigger 5312 can be divided into multiple parts, such as the second trigger portion 53121 and the second connecting portion 53122. The structural forms of the second trigger portion 53121 and the second connecting portion 53122 can be adaptively adjusted according to the use requirements.

[0088] The second trigger 5313 comprises at least one of a roller, a roller shaft and a sliding block.

[0089] When the second trigger 5313 is a roller, the second trigger 5313 can comprise a roller and a roller shaft, and the roller is rotatably connected to the roller shaft, and the roller shaft is fixedly connected to the second connecting portion 53122.

[0090] When the second trigger 5313 is a sliding block, a connecting hole can be formed at the end of the sliding block, and the second connecting portion 53122 is connected in the connecting hole by a fastener such as a pin or a bolt.

[0091] In addition, in order to improve the climbing ability of the second trigger 5313, the second trigger 5313 can be arranged as a roller and a sliding block in cross, a sliding groove can be formed on the sliding block and matched with the structure of the ladder 10, and the handrails on both sides of the ladder 10 can be matched with the sliding groove.

[0092] The elastic component 532 can be any one of a compression spring and a torsion spring.

[0093] When the elastic component 532 is a compression spring, the first end of the compression spring is hung on the second mounting portion 513, and the second end of the compression spring is connected with the swing piece 5311. The swing piece 5311 rotates around the connecting point under the extrusion of the second trigger 5313, so that the compression spring is compressed to store deformation energy under the axial pressure. When the external load on the compression spring disappears, the compression spring resets to drive the swing piece 5311 to reset.

[0094] When the elastic component 532 is a torsion spring, the first torsion arm of the torsion spring is hung on the second mounting portion 513, and the second torsion arm of the torsion spring is connected with the swing piece 5311. When the swing piece 5311 rotates around the connecting point under the extrusion of the second trigger 5313, the torsion spring is extruded to store deformation energy under the radial load. When the external load on the torsion spring disappears, the torsion spring resets to drive the swing piece 5311 to reset.

[0095] Optionally, the second mounting member 51 further comprises a second mounting portion 513 connected with the mounting body 511. The second mounting portion 513 can be formed by bending the side surface of the mounting body 511. The elastic component 532 can be connected to the mounting body 511 through the second mounting portion 513, so that there is a gap between the elastic component 532 and the mounting body 511, facilitating the deformation and reset of the elastic component 532. In addition, in order to prevent the deformation and reset of the elastic component 532 from deviating, a guide can be arranged on at least one of the second mounting portion 513 and the swing piece 5311, so that the elastic component 532 is sleeved on the guide.

[0096] It should be noted that the swing piece 5311 is rotationally connected with the second mounting member 51 through a second connecting member. The second connecting member can include a bolt and a nut. A part of the screw rod of the bolt is formed with a thread, and the thread is suitable for the nut connection. Another part of the screw rod of the bolt is formed with a contact surface, and the contact surface is in contact with the swing piece 5311 to rotate the swing piece 5311 on the surface of the contact surface. The second connecting member can also include a sleeve, which is sleeved on the bolt, and the swing piece 5311 is gap-fitted with the sleeve.

[0097] In some embodiments of the present application, the first elastic trigger component 53 comprises any one of a bumper strip or a rubber spring, and the first detection switch 52 is arranged inside the first elastic trigger component 53. When the elevator body 1 is moving, if an obstacle exists on the moving path of the elevator body 1, the bumper strip or the rubber spring will first collide with the obstacle to deform, thereby causing the first detection switch 52 inside the first elastic trigger component 53 to act to cut off the control circuit of the elevator, thereby preventing the elevator body 1 from continuing to run, and improving the safety of the operation of the elevator.

[0098] In some embodiments of the present application, the positions between the first support mechanism and the top end of the elevator body 1, and between the second support mechanism and the bottom end of the elevator body 1 are each provided with a first detection switch 52 and a first elastic trigger component 53, so as to ensure that the elevator body 1 can avoid colliding with the obstacle on the ladder 10 during the rising and falling of the elevator body 1.

[0099] Since the first detection switch 52 has a high cost, in order to save costs, in some embodiments of the present application, as shown in Figure 10 the anti-collision device 5 further comprises a second elastic trigger component 54 connected to the elevator body 1 and located at the rear side of the support mechanism 12 at the last end of the elevator body 1 in the moving direction of the elevator body 1. The second elastic trigger component 54 is configured to act under the touch of the obstacle on the ladder 10 to link the first elastic trigger component 53 to act.

[0100] It can be understood that one of the first elastic trigger component 53 and the second elastic trigger component 54 is located between the first support mechanism and the bottom end of the elevator body 1, and the other is located between the second support mechanism and the top end of the elevator body 1.

[0101] In the second elastic trigger component 54, the second elastic trigger component 54 is connected to the elevator body 1 through another second mounting member 51. The second elastic trigger component 54 only needs to be provided with a second trigger part or a second trigger member 5313 for colliding with the obstacle. The first detection switch 52 and the first elastic trigger component 53 are correspondingly arranged, and the second elastic trigger component 54 is linked to the first elastic trigger component 53.

[0102] Specifically, the second trigger member 5313 of the second elastic trigger component 54 and the second trigger member 5313 of the first elastic trigger component 53 are connected through a gate line 55. The first end of the gate line 55 can be connected to the tail of the swing member 5311 of the second elastic trigger component 54, and the second end of the gate line 55 can be connected to the head of the swing member 5311 of the first elastic trigger component 53.

[0103] When the elevator body 1 is descending, the first elastic trigger assembly 53 is collided with the climbing personnel to trigger the first detection switch 52. When the elevator body 1 is ascending, when the climbing personnel collides with the second elastic trigger assembly 54, the swing piece 5311 of the second elastic trigger assembly 54 swings downward, the tail of the swing piece 5311 moves upward, at this time, the brake wire is tensioned, the swing piece 5311 of the first elastic trigger assembly 53 swings to trigger the first detection switch 52 to act, so that the elevator body 1 is quickly stopped.

[0104] As shown in Figure 1 some embodiments of the present application, the tower drum elevator further comprises a pull rope switch assembly 6. The pull rope switch assembly 6 comprises a pull rope 61 and a pull rope switch 62. The pull rope switch 62 is adapted to be arranged at the first end of the ladder 10 and connected to the control circuit of the elevator body 1. The first end of the pull rope 61 is connected to the pull rope switch 62, and the second end of the pull rope 61 is adapted to be connected to the second end of the ladder 10. The pull rope 61 is configured to trigger the pull rope switch 62 under the action of a pulling force.

[0105] It can be understood that the pull rope switch 62 is arranged at the low end or the top end of the ladder 10. The first end of the pull rope 61 is connected to the pull rope switch 62, and the second end of the pull rope 61 extends along the ladder 10 to the other end of the ladder 10 and is fixedly connected with the ladder 10.

[0106] When a pulling force is applied to the pull rope switch 62 through the pull rope 61, the pull rope switch 62 can be triggered to perform on-off action to cut off the control circuit of the elevator body 1, thereby controlling the elevator body 1 to stop running. When an emergency occurs, the climbing personnel on the ladder can control the elevator body 1 to stop running by pulling the pull rope 61, preventing the elevator from causing harm to the personnel.

[0107] As shown in 1 and Figure 11 some embodiments of the present application, the tower drum elevator further comprises a guardrail assembly 7. The guardrail assembly 7 comprises a guardrail 71 and a door body. The door body is connected with the guardrail 71 to form an enclosure space 73 for the elevator body 1 to pass through.

[0108] Among them, the door body is connected with the guardrail 71 to form a frame structure that passes through up and down. The guardrail assembly 7 is arranged corresponding to the platform in the tower drum. When the elevator body 1 needs to stop at the platform, it runs into the corresponding guardrail assembly 7. The sliding door 111 of the car 11 is opposite to the door body. By opening the door body and the sliding door 111, personnel can enter and exit the car 11.

[0109] Further, the guardrail assembly 7 further comprises a guardrail lock 72 for locking the door body and the guardrail 71 to close the enclosure space 73. The guardrail lock 72 is connected with the control circuit of the elevator body 1.

[0110] When the guardrail lock 72 is in the state of locking the door body and the guardrail 71, the elevator body 1 can run. When the guardrail lock 72 is in the state of unlocking the door body and the guardrail 71, the elevator body 1 cannot run. In this way, when the elevator body 1 runs, the guardrail 71 and the door body can be ensured to be in the locked state at all times, ensuring that the operating personnel enter the guardrail assembly 7 when the elevator body 1 runs, and ensuring the safety of the personnel.

[0111] In some embodiments of the present application, a door lock switch is arranged on the guardrail lock 72, and the door lock switch is connected to the control circuit of the elevator body 1. When the guardrail lock 72 is in the locked state, the door lock switch is in the closed state, so that the elevator body 1 can run. When the guardrail lock 72 is in the unlocked state, the door lock switch is in the open state, so that the elevator body 1 cannot run.

[0112] As shown in FIGS. Figure 2 and Figure 3 Some embodiments of the tower drum elevator provided by the present application further comprise a platform triggering assembly 8. The platform triggering assembly 8 comprises a third triggering piece 81 and a second detection switch 82. The third triggering piece 81 is connected to the guardrail 71, and the second detection switch 82 is connected to the control circuit of the door lock of the elevator body 1. The third triggering piece 81 is configured to trigger the second detection switch 82 to act when the elevator body 1 runs to the enclosure space 73, so that the door lock of the elevator body 1 is in the open state.

[0113] The second detection switch 82 is installed on the outer side of the car 11 at a position corresponding to the third triggering piece 81. The door lock is arranged on the car door of the elevator body 1, and the door lock can be an electromagnetic door lock.

[0114] When the elevator body 1 runs to the specified position of the enclosure space 73, the third triggering piece 81 can abut the contact of the second detection switch 82. Thus, the second detection switch 82 is triggered to act. At this time, the door lock of the elevator body 1 is in the openable state, and the car 11 can be opened, so that the operating personnel can enter and exit the car 11. This embodiment realizes the linkage control of the door lock of the car door and the guardrail assembly 7. Only when the elevator body 1 runs to the guardrail assembly 7, the personnel can enter and exit the car 11, thereby ensuring the safety of the personnel.

[0115] Specifically, the third triggering piece 81 is provided with a third connecting portion and a third triggering portion connected to each other. The third connecting portion can be installed on the guardrail 71 by means of fasteners such as bolts. The third triggering portion is provided with a first transition surface 811, a triggering surface 812 and a second transition surface 813 connected in sequence. The triggering surface 812 extends along the moving direction of the elevator body 1. The first transition surface 811 and the second transition surface 813 respectively extend in opposite directions from the upper and lower ends of the triggering surface 812, and are respectively arranged in circular arc transition with the triggering surface 812.

[0116] When the elevator body 1 moves upward to the guardrail assembly 7, the contact of the second detection switch 82 slides from the first transition surface 811 to the trigger surface 812 and abuts against the trigger surface 812, so that the second detection switch 82 is in the closed state, and the door lock of the elevator body 1 is in the openable state. When the elevator body 1 moves downward to the guardrail assembly 7, the contact of the second detection switch 82 slides from the second transition surface 813 to the trigger surface 812, so that the second detection switch 82 is in the closed state, and the door lock of the elevator body 1 is in the openable state.

[0117] The second detection switch 82 can be the same as the first detection switch 52, both of which can be contact position sensors. The movement of the third trigger 81 triggers the contact of the second detection switch 82 to move and close, completing the signal output that the elevator body 1 has reached the enclosure space 73, so that the door lock of the elevator body 1 is in an openable state.

[0118] like Figure 4 and Figure 4 As shown, some embodiments of the tower hoist provided by the present invention further include a braking assembly 9. The braking assembly 9 includes a first safety lock 91, a second safety lock 92, and a brake rope 93. The brake rope 93 is adapted to be fixed to the ladder 10 and extends along the ladder 10. The first safety lock 91 and the second safety lock 92 are fixed to the hoist body 1 and are arranged along the brake rope 93. The first safety lock 91 is configured to lock with the brake rope 93 when the movement speed of the hoist body 1 exceeds a first set speed. The second safety lock 92 is configured to lock with the brake rope 93 when the movement speed of the hoist body 1 exceeds a second set speed. The first set speed is less than the second set speed.

[0119] The first end of the brake rope 93 is fixed to the bottom of the ladder 10, and the second end of the brake rope 93 is fixed to the top of the ladder 10, passing through the first safety lock 91 and the second safety lock 92. The first safety lock 91 and the second safety lock 92 have the same structure, both being mechanical safety locks, including a speed measuring wheel, a centrifugal swing block, an unlocking mechanism, and a return spring. The centrifugal swing block is coaxially and fixedly connected to the speed measuring wheel, and the return spring is connected to the unlocking mechanism, which is used to lock or unlock the brake rope.

[0120] When the elevator body 1 is running at normal speed, the brake rope moves within the first safety lock 91 and the second safety lock 92, causing the speed measuring wheel to rotate. The centrifugal block rotates along with the speed measuring wheel. Under the action of the return spring, the unlocking mechanism is in the open state, unlocking the brake rope. When the running speed of the elevator body 1 exceeds a certain range, the speed measuring wheel reaches the corresponding speed, the centrifugal block opens outward, resists the elastic force of the return spring, and triggers the rope locking mechanism, locking the brake rope and thus preventing the elevator body 1 from continuing to run.

[0121] The pre-tightening force of the reset spring in the first safety lock 91 is less than the pre-tightening force of the reset spring in the second safety lock 92. When the running speed of the elevator body 1 exceeds the first set speed, the centrifugal weight of the first safety lock 91 can resist the elastic force of the reset spring therein, so as to lock the rope through the first safety lock 91. When the running speed of the elevator body 1 exceeds the second set speed, the centrifugal weight of the second safety lock 92 can resist the elastic force of the reset spring therein, so as to lock the rope through the second safety lock 92.

[0122] It can be understood that the triggering speed of the first safety lock 91 is less than the triggering speed of the second safety lock 92. When the running speed of the elevator body 1 exceeds the normal range, the first safety lock 91 is triggered first, and only when the first safety lock 91 fails, the second safety lock 92 is triggered, so as to realize double protection of the elevator and improve the safety performance of the elevator.

[0123] As shown in Figure 4 some embodiments of the present application, the driving device 2 further comprises a frequency converter 22. The frequency converter 22 is powered by an external power supply, and the control end thereof is connected to the running button of the elevator body 1. The output end of the frequency converter 22 can be directly connected to the three-phase input terminal of the motor 21, or the output end of the frequency converter is connected to the three-phase input terminal of the motor through a corresponding contactor.

[0124] When the frequency converter 22 receives a control instruction for starting the running of the elevator body 1 (i.e., the up or down running button is pressed), the rotating speed of the motor 21 is gradually increased to a set rotating speed. When the frequency converter 22 receives a control instruction for stopping the running of the elevator body 1, the rotating speed of the motor 21 is gradually reduced from the set rotating speed to zero, so as to realize the soft start and soft stop of the elevator body 1, thereby reducing vibration and impact and prolonging the service life of the steel wire rope. When an emergency occurs, the control device can control the frequency converter according to an external emergency instruction to realize the rapid stop of the elevator body 1, thereby preventing accidents.

[0125] Further, as shown in ​ some embodiments of the present application, the tower drum elevator further comprises an overload detection device 23. The overload detection device 23 is arranged in the elevator body 1 and is in communication connection with the control device. The overload detection device 23 is used for detecting the load of the elevator body 1, which can be a weighing sensor. The control device includes but is not limited to a microprocessor, a PLC controller and a single-chip microcomputer.

[0126] The overload detection device 23 can detect the static load of the elevator body 1, or the dynamic load when the elevator body 1 starts or stops, and send the detected load information to the control device and record. When the cable is stuck when the elevator body 1 is running, the load of the elevator body 1 will fluctuate. The overload detection device 23 can send the detected load to the control device in time, and the control device compares the load with the pre-set load threshold. If the load is overloaded, the frequency converter will control the motor 21 to stop quickly, so that the elevator body 1 stops running quickly, avoiding the cable being pulled off, and improving the safety factor of the elevator. At the same time, the control device can send an alarm signal.

[0127] As shown in ​ In some embodiments of the application, the power output end of the motor 21 is connected with a centrifugal speed limiter (not shown in the figure). The stator winding of the motor 21 is connected with a brake capacitor (not shown in the figure). The centrifugal speed limiter and the brake capacitor are used to limit the descending speed of the elevator body 1 during the descending process of the elevator body 1.

[0128] During the manual descending process of the elevator body 1, the limiting speed of the centrifugal speed limiter is greater than the rated speed, and the centrifugal speed limiter will generate a large wear. In this embodiment, the brake capacitor is added, the stator winding is cut by the rotor of the motor 21, a brake torque opposite to the rotating direction of the motor 21 is generated, the rotating speed of the motor 21 is reduced or stopped, and the speed limiting of the manual descending is realized. The brake capacitor can reduce the use frequency of the centrifugal speed limiter, and prolong the service life of the centrifugal speed limiter.

[0129] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tower hoist, characterized by The elevator body and the motor for driving the elevator body to lift; The brake releasing device is arranged on the elevator body and comprises a first mounting member, a swing arm assembly, a force applying assembly and a brake releasing trigger assembly. The first mounting member is connected to the elevator body and is provided with a partition. The swing arm assembly and the force applying assembly are arranged on the first mounting member respectively. The swing arm assembly is connected to the brake of the motor. The force applying assembly is movably arranged. The force applying assembly comprises a force applying member and a first reset member. The force applying member is movably arranged through the partition. One end of the force applying member is limited on one side of the partition. The first reset member is located on the other side of the partition for resetting the force applying member. The lower profile assembly is arranged below the elevator body and can move upward under the impact of an obstacle. The lower profile assembly is arranged in linkage with the brake releasing device. When the lower profile assembly is in the lower limit position, the brake releasing device is connected in linkage with the brake of the motor. The swing arm assembly abuts against the force applying assembly, so that the force applying assembly can drive the brake to release the brake through the swing arm assembly. When the lower profile assembly is between the lower limit position and the elevator body, the brake releasing device is disconnected from the linkage with the brake. The swing arm assembly is separated from the force applying assembly. The swing arm assembly comprises a swing arm, a second reset member and a pulling member.

2. The tower lift of claim 1, wherein, The first end of the swing arm is connected to the manual release push rod of the brake. The second reset member is arranged between the swing arm and the first mounting member for resetting the swing arm. The first end of the pulling member is connected to the swing arm. The second end of the pulling member is connected to the lower profile assembly. The brake releasing device further comprises a brake releasing trigger assembly. The brake releasing trigger assembly comprises a micro switch and a fourth trigger member. The micro switch is arranged on the moving path of the force applying assembly and is connected to an alarm device and a timing device respectively. The fourth trigger member is arranged on the force applying member and abuts against the first reset member.

3. The tower lift of claim 2, wherein, The fourth trigger member abuts against the micro switch when the force applying assembly moves. The elevator body comprises a support mechanism. The elevator body is adapted to be connected to a ladder through the support mechanism. The tower drum elevator further comprises:

4. The tower lift of claim 1, wherein, An anti-collision device comprising a first detection switch and a first elastic trigger assembly connected to the elevator body respectively. The first detection switch is connected to the control circuit of the elevator body. The first elastic trigger assembly is located on the front side of the support mechanism at the most front end of the elevator body in the moving direction. The first elastic trigger assembly is configured to act under the impact of an obstacle on the ladder to trigger the first detection switch to act. The anti-collision device further comprises:

5. The tower lift of claim 4, wherein, A second mounting member mounted on the elevator body. The first detection switch is mounted on the second mounting member. ​ The first elastic trigger assembly comprises a trigger component and an elastic component, the trigger component is rotationally connected to the second mounting member and abuts against the contact of the first detection switch, and the elastic component is connected between the trigger component and the second mounting member for resetting the trigger component.

6. The tower lift of claim 5, wherein, The trigger component comprises: a swing member rotationally connected to the second mounting member and connected to the elastic component; a first trigger member connected to the swing member and abutting against the contact of the first detection switch; a second trigger member connected to the first trigger member and configured to touch the obstacle on the ladder during movement of the elevator body.

7. The tower lift of claim 4, wherein, The anti-collision device further comprises: a second elastic trigger assembly connected to the elevator body and located at the rear side of the support mechanism at the last end of the elevator body in the movement direction, and configured to act under the touch of the obstacle on the ladder to drive the first elastic trigger assembly.

8. The tower lift of claim 1, wherein, Further comprising: a pull rope switch assembly comprising a pull rope and a pull rope switch; the pull rope switch is adapted to be arranged at the first end of the ladder and connected to the control circuit of the elevator body, the first end of the pull rope is connected to the pull rope switch, and the second end of the pull rope is adapted to be connected to the second end of the ladder, and the pull rope is configured to trigger the pull rope switch under the action of traction.

9. The tower lift of claim 1, wherein, Further comprising: a guardrail assembly comprising a guardrail and a door body connected to the guardrail to form an enclosed space for the elevator body to pass through; a platform trigger assembly comprising a third trigger member and a second detection switch; the third trigger member is connected to the guardrail, the second detection switch is connected to the elevator body, and the third trigger member is configured to trigger the second detection switch to act when the elevator body operates to the enclosed space, so that the door lock of the elevator body is in an open state.

10. The tower lift of claim 1, wherein, Further comprising: a brake assembly comprising a first safety lock, a second safety lock and a brake rope; the brake rope is adapted to be fixed to the ladder and arranged along the ladder, and the first safety lock and the second safety lock are fixed to the elevator body and arranged along the brake rope; the first safety lock is configured to lock with the brake rope when the movement speed of the elevator body exceeds a first set speed, and the second safety lock is configured to lock with the brake rope when the movement speed of the elevator body exceeds a second set speed, and the first set speed is less than the second set speed.

11. The tower lift of claim 1, wherein, Further comprising: a control device and an overload detection device, the overload detection device is arranged on the elevator body and is in communication connection with the control device; a frequency converter, the control end of the frequency converter is connected to the operation button of the elevator body, and the output end of the frequency converter is connected to the motor.

12. The tower lift of claim 1, wherein, The power output end of the motor is connected with a centrifugal speed limiter, and the stator winding of the motor is connected with a brake capacitor, which are used to limit the descending speed of the elevator body during descending.

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