Fan tower drum double door lock

Abstract

The utility model provides a fan tower drum double-door lock, a fan tower drum door comprises an outer door body and an inner door body, the double-door lock comprises an outer door lock arranged on the outer door body, the outer door lock has a first state and a second state, the inner door lock is arranged on the inner door body, the inner door lock has a third state and a fourth state, and when the inner door lock is in the third state, the inner door lock is in the fourth state. When the inner door lock is in the first state, the key assembly is connected with the inner door lock in a clamped mode, the outer door lock is in the first state, when the inner door lock is in the fourth state, the key assembly is separated from the inner door lock, and the key assembly switches the outer door lock to the second state. According to the linkage design that the key assembly can be pulled out only after the key assembly locks the inner door, and then the outer door can be locked, the problem that a ventilation system loses efficacy due to work negligence that only the outer door is locked and the inner door is not locked is solved, and the noise isolation performance of the two door bodies during working of the fan is improved due to the fact that the two doors are locked at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan tower accessories, in particular to a double door lock for a fan tower. BACKGROUND

[0002] At present, wind power is becoming more and more popular, and the application of fan towers is very wide. The fan tower is generally very high, and a wind turbine is installed at the top of the tower. The inside of the wind turbine is very dangerous when it is working, and the noise is very loud. Therefore, the tower door is usually designed with double doors, which have an outer door and an inner door. The two doors work together to improve the safety of the fan tower during use.

[0003] In the prior art, the inner door and the outer door are unlocked and locked by ordinary padlocks or independent keys. Since the two door locks are not associated, when the staff finishes work, they often forget to lock the inner door and leave the tower only by locking the outer door. Since the inner door is provided with equipment for air exchange in the tower, the air exchange will be ineffective if the inner door is not closed. Moreover, a single door cannot effectively isolate the noise of the working fan. SUMMARY

[0004] In view of the above defects or shortcomings in the prior art, the present application aims to provide a double door lock for a fan tower. The fan tower door comprises an outer door body and an inner door body, and the double door lock comprises:

[0005] An outer door lock is arranged on the outer door body, and the outer door lock has a first state and a second state;

[0006] An inner door lock is arranged on the inner door body, and the inner door lock has a third state and a fourth state;

[0007] A key assembly is used to drive the outer door lock to switch between the first state and the second state, and to drive the inner door lock to switch between the third state and the fourth state;

[0008] When the inner door lock is in the third state, the key assembly is in engagement with the inner door lock, and the outer door lock is in the first state. When the inner door lock is in the fourth state, the key assembly is disengaged from the inner door lock, and the key assembly switches the outer door lock to the second state.

[0009] According to the technical scheme provided by the embodiment of the present application, the key assembly is provided with a guide block, and the inner door lock comprises:

[0010] A first housing is arranged on the inner door body, and the first housing has a first cavity inside;

[0011] A first lock cylinder is arranged in the first cavity, and the extension direction of the first lock cylinder is a first direction;

[0012] A first lock body is sleeved on the end of the first lock cylinder close to the outer side of the tower tube, and a first gap is formed between the first lock body and the first lock cylinder;

[0013] A first guide slot is arranged on the first lock body close to the outer side of the tower tube and communicates with the outside, the guide block moves in the first guide slot in the first direction when the inner door lock is in the fourth state, and the key assembly can be separated from the first gap, and the guide block is clamped in the first gap when the inner door lock is in the third state.

[0014] According to the technical scheme provided in the embodiment of the application, the outer door lock comprises:

[0015] A second housing is arranged on the outer door body, and a second cavity is arranged in the second housing;

[0016] A second lock cylinder is arranged in the second cavity, and the extension direction of the second lock cylinder is the first direction;

[0017] A second lock body is sleeved on the end of the second lock cylinder close to the outer side of the tower tube, and a second gap is formed between the second lock body and the second lock cylinder;

[0018] A second guide slot and a third guide slot are arranged on the second lock body close to the outer side of the tower tube and communicate with the outside, the guide block can move in the third guide slot in the first direction when the outer door lock is in the first state, and the guide block can move in the second guide slot in the first direction when the outer door lock is in the second state.

[0019] According to the technical scheme provided in the embodiment of the application, the first lock cylinder has a first boss close to the outer side of the tower tube, the first lock body is sleeved on the first boss, the first lock body is a cylinder, a first limiting portion is formed by extending the edge of the first lock body close to the outer side of the tower tube inward, and the first guide slot is arranged on the first limiting portion, and the guide block is clamped on the first limiting portion when the inner door lock is in the third state.

[0020] According to the technical scheme provided in the embodiment of the application, the second lock cylinder has a second boss close to the outer side of the tower tube, the second lock body is sleeved on the second boss, the second lock body is a cylinder, a second limiting portion is formed by extending the edge of the second lock body close to the outer side of the tower tube inward, and the second guide slot and the third guide slot are arranged on the second limiting portion.

[0021] According to the technical scheme provided in the embodiment of the present application, the inner door body comprises an inner door frame and an inner door leaf, the first shell is arranged on the inner door frame, and the first shell is provided with a first through hole communicated with the first cavity on the side close to the inner door leaf; the first door bolt is arranged on the inner door leaf, the first door bolt is provided with a first arc groove, the first lock cylinder is provided with a second arc groove, when the inner door lock is in the fourth state, the first door bolt is inserted into the first cavity through the first through hole, the first lock cylinder is clamped in the first arc groove, and the first door bolt cannot move, when the key assembly drives the first lock cylinder to rotate to the second arc groove and the second arc groove faces the first door bolt, the inner door lock is switched to the third state, the first door bolt moves in the second arc groove in a second direction, and the second direction is perpendicular to the first direction.

[0022] According to the technical scheme provided in the embodiment of the present application, the outer door body comprises an outer door frame and an outer door leaf, the outer door frame is provided with a locking groove on the side close to the outer door leaf, and the outer door lock is arranged on the outer door leaf.

[0023] The second door bolt is arranged on the outer door leaf, the second door bolt is provided with a third arc groove, the second lock cylinder is provided with a fourth arc groove, and the second shell is provided with a second through hole communicated with the second cavity on the side close to the second door bolt.

[0024] The first handle is rotatably connected to the outer door leaf, the axis direction of rotation is the first direction, and the first handle is provided with a lock tongue on the side close to the outer door frame; when the outer door lock is in the second state, the second door bolt is inserted into the second cavity through the second through hole, the second lock cylinder is clamped in the third arc groove, the second door bolt cannot move, the rotation of the first handle is limited, and the lock tongue is inserted into the locking groove; when the key assembly drives the second lock cylinder to rotate to the fourth arc groove and the fourth arc groove faces the second door bolt, the outer door lock is switched to the first state, the second door bolt moves in the fourth arc groove in the second direction, the limitation is removed, and the rotation of the first handle makes the lock tongue rotate out of the locking groove.

[0025] According to the technical scheme provided in the embodiment of the present application, the outer door leaf is provided with a first lock frame, and the side wall of the first lock frame is provided with two third through holes opposite to each other; one end of the first handle is connected to the outer door leaf, when the outer door lock is in the second state, the second door bolt is inserted into the second cavity through the two third through holes, a first space is formed between the second door bolt and the inner wall of the first lock frame, and the other end of the first handle is arranged in the first space.

[0026] According to the technical scheme provided in the embodiment of the application, the inner door leaf is provided with a second lock frame, the second lock frame is provided with two fourth through holes opposite in the second direction, and the first door bolt is arranged in the fourth through hole.

[0027] According to the technical scheme provided in the embodiment of the application, the first door bolt is provided with a limiting rod, and the limiting rod is arranged between the two fourth through holes.

[0028] To sum up, the application provides a fan tower double door lock. The fan tower door includes an outer door body and an inner door body. The double door lock includes an outer door lock arranged on the outer door body, the outer door lock having a first state and a second state, an inner door lock arranged on the inner door body, the inner door lock having a third state and a fourth state, and a key assembly for driving the outer door lock to switch between the first state and the second state and driving the inner door lock to switch between the third state and the fourth state. When the inner door lock is in the third state, the key assembly is clamped with the inner door lock, and the outer door lock is in the first state. When the inner door lock is in the fourth state, the key assembly is disengaged from the inner door lock, the key assembly switches the outer door lock to the second state. This scheme can unlock or lock the outer door and the inner door by using the same key assembly. When the inner door is unlocked, the key assembly cannot be pulled out. The key assembly can be pulled out only after the inner door is locked by the key assembly, and the outer door can be locked again. The linkage design avoids the problem of invalidation of the ventilation system caused by the work negligence of only locking the outer door but not locking the inner door. The double doors are locked at the same time, which improves the noise isolation performance of the double door body when the fan works. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The cross-sectional view of the double door lock of the fan tower is provided in the embodiment of the application.

[0030] Figure 2 The structural view of the inner door lock is provided in the embodiment of the application.

[0031] Figure 3 The structural view of the outer door lock is provided in the embodiment of the application.

[0032] Figure 4 The exploded structural view of the inner door lock is provided in the embodiment of the application.

[0033] Figure 5 The exploded structural view of the outer door lock is provided in the embodiment of the application.

[0034] Figure 6 The structural view of the lock tongue and the locking groove is provided in the embodiment of the application.

[0035] The text annotations in the figure represent:

[0036] 1, outer door body; 11, outer door frame; 2, inner door body; 3, outer door lock; 4, inner door lock; 31, second housing; 32, second lock body; 311, second through hole; 321, second guide groove; 322, third guide groove; 34, first lock frame; 341, third through hole; 35, second lock cylinder; 36, second door bolt; 37, first handle; 371, lock tongue; 5, key assembly; 51, guide block; 351, fourth arc groove; 352, second matching column; 361, third arc groove; 41, first door bolt; 411, first arc groove; 42, limiting rod; 43, first housing; 431, first through hole; 44, first lock body; 441, first guide groove; 45, first lock cylinder; 451, second arc groove; 452, first boss; 453, first matching column. DETAILED DESCRIPTION

[0037] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that only the parts related to the application are shown in the drawings for the sake of convenience of description.

[0038] It should be noted that the examples in the application and the features in the examples can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in conjunction with the examples.

[0039] As mentioned in the background, in order to solve the problems in the prior art, the application provides a fan tower double door lock, the fan tower door includes an outer door body 2 and an inner door body 1, the double door lock includes:

[0040] An outer door lock 3 is arranged on the outer door body 1, the outer door lock 3 has a first state and a second state;

[0041] An inner door lock 4 is arranged on the inner door body 2, the inner door lock 4 has a third state and a fourth state;

[0042] A key assembly 5 is used to drive the outer door lock 3 to switch between the first state and the second state, and drive the inner door lock 4 to switch between the third state and the fourth state;

[0043] When the inner door lock 4 is in the third state, the key assembly 5 is clamped with the inner door lock 4, and the outer door lock 3 is in the first state, when the inner door lock 4 is in the fourth state, the key assembly 5 is separated from the inner door lock 4, and the key assembly 5 switches the outer door lock 3 to the second state.

[0044] Please refer to Figure 1As shown, the first state and the second state correspond to the unlocking and locking states of the outer door lock 3 respectively, the third state and the fourth state correspond to the unlocking and locking states of the inner door lock 4 respectively, the key assembly 5 matches the inner door lock 4 and the outer door lock 3, and can control the unlocking or locking of the outer door and the inner door, and the key assembly 5 cannot be pulled out of the inner door lock 4 when the inner door is unlocked, and the key assembly 5 must be pulled out after the inner door lock 4 is locked, and then the outer door lock 3 can be locked. The linkage design avoids the problem of invalidation of the ventilation system caused by the work negligence of locking only the outer door but not the inner door, and the simultaneous locking of the double doors also improves the noise insulation performance of the double door body when the fan is working.

[0045] In a preferred embodiment, the key assembly 5 is provided with a guide block 51, and the inner door lock 4 comprises:

[0046] A first shell 43 is arranged on the inner door body 2, and the first shell 43 has a first cavity inside;

[0047] A first lock cylinder 45 is arranged in the first cavity, and the extension direction of the first lock cylinder 45 is a first direction;

[0048] A first lock body 44 is sleeved on the end of the first lock cylinder 45 close to the outer side of the tower cylinder, and the first lock body 44 has a first gap with the first lock cylinder 45;

[0049] A first guide groove 441 is arranged on the first lock body 44 close to the outer side of the tower cylinder and communicates with the outside, when the inner door lock 4 is in the fourth state, the guide block 51 moves in the first direction in the first guide groove 441, and the key assembly 5 can be separated from the first gap, when the inner door lock 4 is in the third state, the guide block 51 is clamped in the first gap.

[0050] In a preferred embodiment, the first lock cylinder 45 has a first boss 452 close to the outer side of the tower cylinder, the first boss 452 is sleeved with the first lock body 44, the first lock body 44 is cylindrical, the first lock body 44 extends inwardly to form a first limiting portion close to the edge of the outer side of the tower cylinder, and the first guide groove 441 is arranged on the first limiting portion, when the inner door lock 4 is in the third state, the guide block 51 is clamped on the first limiting portion.

[0051] In a preferred embodiment, the inner door body 2 comprises an inner door frame and an inner door leaf, the first shell 43 is arranged on the inner door frame, the first shell 43 has a first through hole 431 in communication with the first cavity on the side close to the inner door leaf; the inner door leaf is provided with a first door bolt 41, the first door bolt 41 has a first arc groove 411, the first lock cylinder 45 has a second arc groove 451; when the inner door lock 4 is in the fourth state, the first door bolt 41 penetrates through the first through hole 431 and is inserted into the first cavity, the first lock cylinder 45 is clamped in the first arc groove 411, and the first door bolt 41 cannot move, when the key assembly 5 drives the first lock cylinder 45 to rotate to the second arc groove 451 towards the first door bolt 41, the inner door lock 4 switches to the third state, the first door bolt 41 moves in the second arc groove 451 in a second direction, and the second direction is perpendicular to the first direction.

[0052] Please refer to Figure 2 and Figure 4 , the first direction is perpendicular to the tangent plane of the inner door body 2, the number of the guide blocks 51 is two, which are semicylindrical convex structures, and are oppositely arranged on the side of the key assembly 5 close to the inner door lock 4 and / or the outer door lock 3, the number of the first guide grooves 441 is two, which are oppositely arranged on the first limiting part. The first shell 43 is a hollow rectangular structure, the first lock body 44 is a cylindrical structure, which is arranged on the outer side of the first shell 43 close to the tower, the cylindrical edge of the first lock body 44 extends inward to form a ring structure, which is the first limiting part, the first lock cylinder 45 is a T-shaped structure, the T-shaped head is the first boss 452, the first boss 452 is provided with a first matching column 453, the inner cavity of the key assembly 5 close to the first boss 452 side has a matching hole matched with the first matching column 453, the first arc groove 411 is matched with the first lock cylinder 45, the second arc groove 451 is matched with the first door bolt 41, and the first door bolt 41 is arranged vertically to the first lock cylinder 45.

[0053] When the inner door lock 4 is in the second state, the first lock cylinder 45 is in the first arc slot 411, and the second arc slot 451 is not directed to the first door bolt 41, the first lock cylinder 45 restricts the axial pulling of the first door bolt 41, the first door bolt 41 connects the inner door frame and the inner door leaf, and the locking is achieved; when the staff needs to unlock the inner door lock 4, the following operations are performed: the guide block 51 of the key assembly 5 is aligned with the first guide slot 441, the key assembly 5 is inserted into the first gap, the first matching column 453 is inserted into the matching hole, the key assembly 5 twists the first lock cylinder 45, the first lock cylinder 45 is rotated to the second arc slot 451 directed to the first door bolt 41, providing a space for the first door bolt 41 to escape from the first through hole 431, the inner door leaf and the inner door frame are separated, and the unlocking is completed. At this time, due to the twisting of the key assembly 5 to the unlocking state, the guide block 51 is misaligned with the first guide slot 441, the guide block 51 lacks axial space, so that the guide block 51 is clamped by the first limiting part, and the key assembly 5 is limited in the first gap and cannot be pulled out.

[0054] When the staff completes the work operation in the tower drum and wants to leave the tower drum, the inner door lock 4 is first locked, and the following operations are performed at this time: the first door bolt 41 is pulled and inserted into the first through hole 431, the key assembly 5 is twisted to rotate the first lock cylinder 45 to the second arc slot 451 not directed to the locking position of the first door bolt 41, the first door bolt 41 cannot be pulled, and the guide block 51 is aligned with the first guide slot 441 at this time. The key assembly 5 is pulled out of the first gap.

[0055] In a preferred embodiment, the outer door lock 3 comprises:

[0056] A second housing 31 is arranged on the outer door body 1, and the second housing 31 has a second cavity in the second housing 31;

[0057] A second lock cylinder 35 is arranged in the second cavity, and the extension direction of the second lock cylinder 35 is the first direction;

[0058] A second lock body 32 is sleeved on the end of the second lock cylinder 35 close to the outer side of the tower drum, and the second lock body 32 and the second lock cylinder 35 have a second gap therebetween;

[0059] The second guide slot 321 and the third guide slot 322 are arranged on the second lock body 32 close to the outer side of the tower drum and communicate with the outside. When the outer door lock 3 is in the first state, the guide block 51 can move in the first direction in the third guide slot 322. When the outer door lock 3 is in the second state, the guide block 51 can move in the first direction in the second guide slot 321.

[0060] In a preferred embodiment, the second lock cylinder 35 has a second boss close to the outer side of the tower drum. The second boss is sleeved with the second lock body 32. The second lock body 32 is cylindrical. The second lock body 32 extends inward close to the outer side edge of the tower drum to form a second limiting part. The second guide slot 321 and the third guide slot 322 are arranged on the second limiting part.

[0061] In a preferred embodiment, the outer door body 1 includes an outer door frame 11 and an outer door leaf. The outer door frame 11 has a locking slot close to the side of the outer door leaf. The outer door lock 3 is arranged on the outer door leaf. The outer door lock 3 further includes:

[0062] A second door pin 36 is arranged on the outer door leaf. The second door pin 36 has a third arc slot 361. The second lock cylinder 35 has a fourth arc slot 351. The second housing 31 has a second through hole 311 close to the side of the second door pin 36 and communicating with the second cavity.

[0063] A first handle 37 is rotatably connected to the outer door leaf. The axis direction of rotation is the first direction. The first handle 37 has a lock tongue 371 close to the side of the outer door frame 11. When the outer door lock 3 is in the second state, the second door pin 36 is inserted into the second cavity through the second through hole 311. The second lock cylinder 35 is clamped in the third arc slot 361. The second door pin 36 cannot move, which restricts the rotation of the first handle 37. The lock tongue 371 is inserted into the locking slot. When the key assembly 5 rotates the second lock cylinder 35 to the fourth arc slot 351 towards the second door pin 36, the outer door lock 3 switches to the first state. The second door pin 36 moves in the second direction in the fourth arc slot 351, which removes the restriction. The rotation of the first handle 37 causes the lock tongue 371 to rotate out of the locking slot.

[0064] In a preferred embodiment, the outer door leaf is provided with a first lock frame 34, the side wall of the first lock frame 34 has two opposite third through holes 341; one end of the first handle 37 is connected to the outer door leaf, when the outer door lock 3 is in the second state, the second bolt 36 is inserted into the second cavity through the two third through holes 341, the second bolt 36 and the inner wall of the first lock frame 34 together form a first space, the other end of the first handle 37 is arranged in the first space.

[0065] Please refer to Figure 3 and Figure 5 As shown in the drawings, the number of the second guide grooves 321 is two, the number of the third guide grooves 322 is two, the setting direction of the second guide grooves 321 is the same as that of the first guide grooves 441, the included angle between the third guide grooves 322 and the second guide grooves 321 is 90 degrees, the structures of the second shell 31, the second lock body 32 and the second lock cylinder 35 are similar to those of the first shell 43, the first lock body 44 and the first lock cylinder 45 respectively, the third arc groove 361 is matched with the second lock cylinder 35, the fourth arc groove 351 is matched with the second bolt 36, the working principle is the same as the avoidance principle of the first arc groove 411 and the second arc groove 451, which will not be repeated here, the first lock frame 34 is approximately in the shape of a pointed house, which is arranged perpendicularly to the outer door leaf.

[0066] One end of the first handle 37 connected to the outer door leaf serves as a rotating shaft, and the other end has the lock tongue 371 extending to the side of the outer door frame 11, the second shell 31 and the outer door leaf have an avoidance space for the rotation of the lock tongue 371, the first handle 37 can serve as a door handle and also as a part of the door lock, the second lock cylinder 35 locks the second bolt 36, thereby limiting the rotation of the first handle 37, so that the lock tongue 371 cannot be rotated out of the locking groove, achieving locking, the second boss has a second matching column 352, which is also matched with the matching hole.

[0067] When the worker enters the tower drum, the key assembly 5 is inserted into the second gap, the second lock cylinder 35 is turned, the second door bolt 36 is pulled out, the rotation of the first handle 37 is released, the first handle 37 is turned, the lock tongue 371 is turned out of the locking groove, the outer door leaf is separated from the outer door frame 11, the guide block 51 is aligned with the third guide groove 322, the key assembly 5 is pulled out, and then the key assembly 5 is inserted into the first gap to unlock the inner door lock 4. After unlocking, you can enter the tower drum. At this time, the key assembly 5 remains in the first gap. When the work is completed, turn the key assembly 5 to lock the inner door lock 4, pull out the key assembly 5, and then lock the outer door lock 3. The specific operation is as follows:

[0068] Turn the first handle 37 to one end in the first space, pull the second door bolt 36 through the third through hole 341 and insert it into the second through hole 311, insert the key assembly 5 into the second gap, and turn the key assembly 5 to the fourth arc groove 351 not facing the second door bolt 36. At this time, the guide block 51 is aligned with the second guide groove 321, and the key assembly 5 is pulled out.

[0069] In a preferred embodiment, a second lock frame is provided on the inner door leaf, and the second lock frame has two fourth through holes opposite in the second direction, and the first door bolt 41 is arranged in the fourth through hole.

[0070] Please refer to Figure 2 As shown, the second lock frame is a U-shaped iron stand, the bottom is welded on the inner door leaf, and the fourth through hole is arranged on the convex side wall. The second lock frame is used to support and guide the second door bolt 36.

[0071] In a preferred embodiment, the first door bolt 41 is provided with a limiting rod 42, and the limiting rod 42 is arranged between the two fourth through holes.

[0072] Please refer to Figure 2 As shown, the limiting rod 42 facilitates pulling the first door bolt 41, and the limiting rod 42 can make the first door bolt 41 be clamped on the second lock frame to avoid slipping.

[0073] The principles and implementation manners of the present application are described by using specific examples in the present article, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only the preferred implementation manners of the present application. It should be noted that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A double door lock for a fan tower, comprising an outer door body (1) and an inner door body (2), characterized in that, Also comprising: An outer door lock (3) provided on the outer door body (1), the outer door lock (3) having a first state and a second state; An inner door lock (4) provided on the inner door body (2), the inner door lock (4) having a third state and a fourth state; A key assembly (5) for driving the outer door lock (3) to switch between the first state and the second state, and driving the inner door lock (4) to switch between the third state and the fourth state; When the inner door lock (4) is in the third state, the key assembly (5) is clamped with the inner door lock (4), and the outer door lock (3) is in the first state; when the inner door lock (4) is in the fourth state, the key assembly (5) is separated from the inner door lock (4), and the key assembly (5) switches the outer door lock (3) to the second state.

2. The fan tower double door lock of claim 1, wherein: The key assembly (5) is provided with a guide block (51), and the inner door lock (4) comprises: A first shell (43) provided on the inner door body (2), the first shell (43) having a first cavity inside; A first lock cylinder (45) provided in the first cavity, the extension direction of the first lock cylinder (45) being a first direction; A first lock body (44) sleeved on the end of the first lock cylinder (45) close to the outer side of the tower cylinder, the first lock body (44) and the first lock cylinder (45) having a first gap therebetween; A first guide groove (441) in communication with the outside, provided on the first lock body (44) close to the outer side of the tower cylinder; when the inner door lock (4) is in the fourth state, the guide block (51) moves in the first direction in the first guide groove (441), and the key assembly (5) can be separated from the first gap; when the inner door lock (4) is in the third state, the guide block (51) is clamped in the first gap.

3. The dual damper of claim 2, wherein: The outer door lock (3) comprises: A second shell (31) provided on the outer door body (1), the second shell (31) having a second cavity inside; A second lock cylinder (35) provided in the second cavity, the extension direction of the second lock cylinder (35) being the first direction; A second lock body (32) sleeved on the end of the second lock cylinder (35) close to the outer side of the tower cylinder, the second lock body (32) and the second lock cylinder (35) having a second gap therebetween; Second guide groove (321) and third guide groove (322), the second guide groove (321) and the third guide groove (322) are communicated with the outside, be located in the second lock body (32) close to the tower tube outside;When the outer door lock (3) is in the first state, the guide block (51) can move in the third guide groove (322) along the first direction, when the outer door lock (3) is in the second state, the guide block (51) can move in the second guide groove (321) along the first direction.

4. The dual damper of claim 2, wherein: The first lock cylinder (45) has a first boss (452) close to the tower tube outside, the first boss (452) is provided with the first lock body (44), the first lock body (44) is cylindrical, the first lock body (44) extends inward to form a first limiting portion close to the tower tube outside edge, the first guide groove (441) is arranged on the first limiting portion, when the inner door lock (4) is in the third state, the guide block (51) is clamped on the first limiting portion.

5. The dual damper of claim 3, wherein: The second lock cylinder (35) has a second boss close to the tower tube outside, the second boss is provided with the second lock body (32), the second lock body (32) is cylindrical, the second lock body (32) extends inward to form a second limiting portion close to the tower tube outside edge, the second guide groove (321) and the third guide groove (322) are arranged on the second limiting portion.

6. The dual damper of claim 3, wherein: The inner door body (2) includes an inner door frame and an inner door leaf, the first shell (43) is arranged on the inner door frame, and the first shell (43) has a first through hole (431) communicated with the first cavity close to the inner door leaf side;The first door pin (41) is arranged on the inner door leaf, the first door pin (41) has a first arc groove (411), and the first lock cylinder (45) has a second arc groove (451);When the inner door lock (4) is in the fourth state, the first door pin (41) penetrates the first through hole (431) and is inserted into the first cavity, the first lock cylinder (45) is clamped in the first arc groove (411), and the first door pin (41) cannot move, when the key assembly (5) drives the first lock cylinder (45) to rotate to the second arc groove (451) towards the first door pin (41), the inner door lock (4) switches to the third state, the first door pin (41) moves in the second arc groove (451) along a second direction, and the second direction is perpendicular to the first direction.

7. The fan tower double lock of claim 6, wherein: The outer door body (1) includes an outer door frame (11) and an outer door leaf, the outer door frame (11) has a locking groove close to the outer door leaf side in the outer door frame (11), the outer door lock (3) is arranged on the outer door leaf, and the outer door lock (3) further comprises: A second door bolt (36) is arranged on the outer door leaf, and a third arc slot (361) is arranged on the second door bolt (36). A fourth arc slot (351) is arranged on the second lock cylinder (35). The second housing (31) is provided with a second through hole (311) which is in communication with the second cavity and is located close to the second door bolt (36). A first handle (37) is rotatably connected to the outer door leaf, and the axis direction of rotation is the first direction. The first handle (37) is provided with a lock tongue (371) which is located close to the outer door frame (11). When the outer door lock (3) is in the second state, the second door bolt (36) is inserted into the second cavity through the second through hole (311), the second lock cylinder (35) is clamped in the third arc slot (361), the second door bolt (36) cannot move, the rotation of the first handle (37) is limited, and the lock tongue (371) is inserted into the locking slot. When the key assembly (5) drives the second lock cylinder (35) to rotate to the fourth arc slot (351) which faces the second door bolt (36), the outer door lock (3) is switched to the first state, the second door bolt (36) moves in the fourth arc slot (351) along the second direction, the limitation is removed, and the rotation of the first handle (37) makes the lock tongue (371) rotate out of the locking slot.

8. The dual damper of claim 7, wherein: A first lock frame (34) is arranged on the outer door leaf, and two third through holes (341) are arranged on the side wall of the first lock frame (34). One end of the first handle (37) is connected to the outer door leaf. When the outer door lock (3) is in the second state, the second door bolt (36) is inserted into the second cavity through the two third through holes (341), and a first space is formed between the second door bolt (36) and the inner wall of the first lock frame (34). The other end of the first handle (37) is arranged in the first space.

9. The dual damper of claim 6, wherein: A second lock frame is arranged on the inner door leaf, and two fourth through holes which face each other along the second direction are arranged on the second lock frame. The first door bolt (41) is arranged in the fourth through hole.

10. The fan tower double door lock of claim 9, wherein: A limiting rod (42) is arranged on the first door bolt (41), and the limiting rod (42) is arranged between the two fourth through holes.

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