CN112943048A - Emergency evacuation passageway escape linkage device - Google Patents

Emergency evacuation passageway escape linkage device Download PDF

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Publication number
CN112943048A
CN112943048A CN202110264485.5A CN202110264485A CN112943048A CN 112943048 A CN112943048 A CN 112943048A CN 202110264485 A CN202110264485 A CN 202110264485A CN 112943048 A CN112943048 A CN 112943048A
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CN
China
Prior art keywords
door body
pedal
locking
releasing mechanism
escape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110264485.5A
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Chinese (zh)
Inventor
白利强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110264485.5A priority Critical patent/CN112943048A/en
Publication of CN112943048A publication Critical patent/CN112943048A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/42Sliding wings; Details of frames with respect to guiding
    • E06B3/46Horizontally-sliding wings
    • E06B3/4636Horizontally-sliding wings for doors
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00Accessories in connection with locks
    • E05B17/22Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B53/00Operation or control of locks by mechanical transmissions, e.g. from a distance
    • E05B53/001Foot-operation
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00Locks or fastenings for special use
    • E05B65/08Locks or fastenings for special use for sliding wings
    • E05B65/087Locks or fastenings for special use for sliding wings the bolts sliding parallel to the wings
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C1/00Fastening devices with bolts moving rectilinearly
    • E05C1/08Fastening devices with bolts moving rectilinearly with latching action
    • E05C1/12Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/16Devices holding the wing by magnetic or electromagnetic attraction
    • E05C19/166Devices holding the wing by magnetic or electromagnetic attraction electromagnetic
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00Suspension arrangements for wings
    • E05D15/06Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
    • E05D15/0621Details, e.g. suspension or supporting guides
    • E05D15/0626Details, e.g. suspension or supporting guides for wings suspended at the top
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/02Closers or openers for wings, not otherwise provided for in this subclass gravity-actuated, e.g. by use of counterweights

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Emergency Lowering Means (AREA)

Abstract

The invention discloses an escape linkage device of an emergency evacuation channel, which comprises a pedal plate, a locking and releasing mechanism and a door body, wherein the door body is connected to the lower part of a cross beam of a wall body in a sliding manner, the door body is provided with the locking and releasing mechanism, and the pedal plate is connected with the locking and releasing mechanism; when the pedal is stepped on, the locking and releasing mechanism is switched from a locking state to a releasing state, so that the door body is released and opened. The technical effects achieved are as follows: according to the escape linkage device of the emergency evacuation channel, manual operation of escape personnel is not needed, the structure is simple, the door body can be quickly opened only by treading the pedal plate, and the evacuation problem under emergency is effectively solved.

Description

Emergency evacuation passageway escape linkage device
Technical Field
The invention relates to the technical field of escape facilities, in particular to an escape linkage device of an emergency escape passage, which is used for evacuating and protecting places with special requirements on outdoor stairs.
Background
The general steel three proofings vertical hinged door of using of sparse stair exit door that has now, establish machinery and hit the lock, open the direction and be outside, the handle that opens the door is established to the inboard, open in the inboard, when outwards sparse by the interior people of stair, can move the spanner downwards and can open by the biparting, for guaranteeing safety, do not establish in the outside and open the handle and can not open, under emergency, the people who has not accepted the training of fleing, very difficult very first time makes the exact operation, cause easily to block up and step on secondary damage such as step on.
Disclosure of Invention
Therefore, the invention provides an escape linkage device of an emergency evacuation passageway, which solves the problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to a first aspect of the invention, the escape linkage device of the emergency evacuation channel comprises a pedal plate, a locking and releasing mechanism and a door body, wherein the door body is connected to the lower part of a cross beam of a wall body in a sliding manner, the locking and releasing mechanism is arranged on the door body, and the pedal plate is connected with the locking and releasing mechanism; when the pedal is stepped on, the locking and releasing mechanism is switched from a locking state to a releasing state, so that the door body is released and opened.
The door body is connected to the lower portion of the cross beam of the wall body in a sliding mode through the pulley block.
Furthermore, the locking and releasing mechanism comprises an electric control switch, an electromagnetic lock, a traction rope and a balance weight, the electric control switch is arranged below the pedal plate, the electric control switch and the electromagnetic lock form a closed circuit loop through a conducting wire, the electromagnetic lock is magnetically adsorbed at the vertical edge of one side of the door body, the vertical edge of the other side of the door body is connected with one end of the traction rope, and the other end of the traction rope is connected with the balance weight; when the pedal is stepped, the electromagnetic lock is powered off, the door body is separated from the adsorption of the electromagnetic lock, and the door body is opened under the action of the balance weight.
Furthermore, the wall body further comprises a fixed pulley, the fixed pulley is arranged below the cross beam of the wall body, and the traction rope bypasses the fixed pulley and is fixed on the balance weight.
Further, the gravity of the balance weight is larger than the friction force between the door body and the cross beam.
The pedal is arranged on the ground, and the pedal is in an initial state and forms a preset angle with the ground under the action of the reset torsion spring; when the pedal is in an initial state, the pedal is separated from the contact with the electronic control switch, and when the pedal is stepped down, the pedal is contacted with the electronic control switch.
Further, the electric control switch is a normally closed switch.
Further, still include the battery, the electromagnetic lock with the battery electricity is connected, the battery is lithium cell or lead acid battery.
Furthermore, the locking and releasing mechanism comprises a traction rope, a fixed pulley, a spring and a bolt, the fixed pulley is fixed at a cross beam at the top of the wall body, the pedal plate is connected with one end of the traction rope, the other end of the traction rope bypasses the fixed pulley and is connected with the bolt, and the bolt is inserted into the door body under the action of the elastic force of the spring to lock the door body; when the pedal is stepped on, the bolt is separated from the locking state between the bolt and the door body.
Further, the door body is of a stainless steel integrated structure.
The invention has the following advantages: according to the escape linkage device of the emergency evacuation channel, manual operation of escape personnel is not needed, the structure is simple, the door body can be quickly opened only by treading the pedal plate, and the evacuation problem under emergency is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a block diagram of an escape linkage of an emergency evacuation passageway according to some embodiments of the present invention.
Fig. 2 is a structural diagram of an escape linkage of an emergency evacuation passageway according to another embodiment of the present invention.
Fig. 3 is a partial structural view of an escape linkage device of an emergency evacuation passageway according to another embodiment of the present invention.
In the figure: 1. the device comprises a pedal, 2, an electric control switch, 3, an electromagnetic lock, 4, a door body, 5, a pulley block, 6, a cross beam, 7, a traction rope, 8, a fixed pulley, 9, a balance weight, 10, a spring, 11 and a bolt.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an emergency evacuation passageway escape linkage device in an embodiment of a first aspect of the present invention includes a pedal 1, a locking and releasing mechanism, and a door 4, wherein the door 4 is slidably connected to a lower portion of a cross beam 6 of a wall, the door 4 is provided with the locking and releasing mechanism, and the pedal 1 is connected to the locking and releasing mechanism; when the pedal 1 is stepped on, the locking and releasing mechanism is switched from a locking state to a releasing state, so that the door 4 is released and opened.
In the above embodiment, it should be noted that when the lock release mechanism is in the lock state, the door 4 is in the closed state, and when the lock release mechanism is in the release state, the door 4 is in the open state.
The technical effects achieved by the above embodiment are as follows: through the emergency evacuation passageway aggregate unit that flees of this embodiment, need not the personnel manual operation of fleing, simple structure only needs to trample the running-board and can realize that the door body opens fast, the effectual evacuation problem under the emergency of having solved.
Optionally, as shown in fig. 1, in some embodiments, the door further includes a pulley block 5, and the door body 4 is slidably connected to a lower portion of the beam 6 of the wall body through the pulley block 5.
In the above alternative embodiment, it should be noted that the pulley block 5 refers to a plurality of sets of pulleys arranged above the door body 4, a bracket of the pulleys is fixed on the door body 4, and the pulley block 5 is slidably connected to a pulley groove formed in the cross beam 6, or two sets of pulleys clamp a guide rail rolling on the cross beam 6.
The beneficial effects of the above alternative embodiment are: through setting up assembly pulley 6, when door body 4 opened, frictional resistance was less, and door body 4 opens rapidly.
Optionally, as shown in fig. 1, in some embodiments, the locking and releasing mechanism includes an electric control switch 2, an electromagnetic lock 3, a pulling rope 7 and a counterweight 9, the electric control switch 2 is disposed below the pedal 1, the electric control switch 2 and the electromagnetic lock 3 form a closed circuit loop through a wire, the electromagnetic lock 3 is magnetically adsorbed at a vertical edge of one side of the door body 4, a vertical edge of the other side of the door body 4 is connected with one end of the pulling rope 7, and the other end of the pulling rope 7 is connected with the counterweight 9; when the pedal 1 is stepped on, the electromagnetic lock 3 is powered off, the door body 4 is separated from the adsorption of the electromagnetic lock 3, and the door body 4 is opened under the action of the counterweight 9.
In the above optional embodiment, it should be noted that, during use, when the door body 4 is closed, the pedal plate 1 does not contact the electronic control switch 2, the electronic control switch 2 is in a closed state, at this time, the electromagnetic lock 3 is in an energized state, the electromagnetic lock 3 locks the door body 4 under the action of magnetic force, when the door body 4 needs to be opened, the pedal plate 1 is stepped on, so that the electronic control switch 2 is in an open state, the magnetic force of the electromagnetic lock 3 disappears, and the door body 4 is rapidly opened under the driving of the gravity action of the counterweight 9.
The beneficial effects of the above alternative embodiment are: through the specific structure of the locking and releasing mechanism of the embodiment, the door body 4 is quickly opened, the service life is long, the labor force is reduced, and the safety is improved.
Optionally, as shown in fig. 1, in some embodiments, the wall further includes a fixed pulley 8, the fixed pulley 8 is disposed below the beam 6 of the wall, and the traction rope 7 is fixed on the counterweight 9 by passing around the fixed pulley 8.
In the above alternative embodiment, it should be noted that, in order to enhance the rotation speed of the fixed pulley 8, the fixed pulley 8 is rotatably connected to the pulley bracket of the cross beam 6 through a bearing, and in addition, in order to enhance the engagement degree between the traction rope 7 and the outer peripheral side of the fixed pulley 8, a plurality of protrusions are provided on the traction rope 7, and a groove engaged with the protrusions is provided on the outer side wall of the fixed pulley 8.
The beneficial effects of the above alternative embodiment are: through setting up fixed pulley 8, realized the quick take-off and landing of counter weight 9.
Alternatively, as shown in fig. 1, in some embodiments, the weight force of the counterweight 9 is greater than the friction force between the door body 4 and the cross member 6.
In the above alternative embodiment, it should be noted that the counterweight 9 may be a structure formed by combining a plurality of sub-counterweights, so as to be suitable for different frictional resistances for opening the door body 4.
The beneficial effects of the above alternative embodiment are: through setting up counter weight 9, realized that counter weight 9's action of gravity drives door body 4 and opens.
Optionally, as shown in fig. 1, in some embodiments, the foot rest further includes a return torsion spring, the return torsion spring is disposed between the foot rest 1 and the ground, and under the action of the return torsion spring, the initial state of the foot rest 1 is a preset angle with the ground; when the pedal 1 is in the initial state, the pedal 1 is separated from the contact with the electric control switch 2, and when the pedal 1 is stepped down, the pedal 1 is in contact with the electric control switch 2.
In the above optional embodiment, it should be noted that an included angle between the pedal plate 1 and the ground is an acute angle, and in order to increase the stepping effect, a granular or stripe-shaped anti-slip protrusion is disposed on a surface of the pedal plate 1 facing away from the ground.
The beneficial effects of the above alternative embodiment are: the automatic reset of the pedal 1 in the non-working state is realized by arranging the reset torsion spring.
Optionally, as shown in fig. 1, in some embodiments, the electronically controlled switch 2 is a normally closed switch.
In the above alternative embodiment, it should be noted that the normally closed switch is opened when the foot pedal 1 is depressed.
The beneficial effects of the above alternative embodiment are: the electric control switch 2 is set to be a normally closed switch, so that the effective adsorption door body 4 of the electromagnetic lock 3 in the initial state is ensured.
Optionally, as shown in fig. 1, in some embodiments, a storage battery is further included, and the electromagnetic lock 3 is electrically connected to the storage battery, and the storage battery is a lithium battery or a lead-acid battery.
The beneficial effects of the above alternative embodiment are: through setting up the battery, improved the duration of a journey of whole device.
Optionally, as shown in fig. 1, in some embodiments, the door body 4 is a stainless steel integrally formed structure.
In the above alternative embodiment, it should be noted that the door body 4 may also be made of wood, and an iron plate is disposed at a position where the door body 4 contacts the electromagnetic lock 3.
The beneficial effects of the above alternative embodiment are: the door body 4 made of stainless steel avoids the corrosion of the door body in the using process.
As shown in fig. 2 and fig. 3, an emergency evacuation passageway escape linkage device in a second aspect embodiment of the present invention includes a pedal 1, a locking and releasing mechanism, and a door 4, wherein the door 4 is slidably connected to a lower portion of a cross beam 6 of a wall, the door 4 is provided with the locking and releasing mechanism, and the pedal 1 is connected to the locking and releasing mechanism; when the pedal 1 is stepped on, the locking and releasing mechanism is switched from a locking state to a releasing state, so that the door 4 is released and opened.
In the above optional embodiment, it should be noted that the locking and releasing mechanism includes a pulling rope 7, a fixed pulley 8, a spring 10 and a latch 11, the fixed pulley 8 is fixed at the top of the wall at the cross beam 6, the pedal 1 is connected with one end of the pulling rope 7, the other end of the pulling rope 7 bypasses the fixed pulley 8 and is connected with the latch 11, and the latch 11 is inserted into the door 4 under the elastic force of the spring 10 to lock the door 4; when the foot pedal 1 is depressed, the latch 11 is released from the locked state with the door 4.
The beneficial effects of the above alternative embodiment are: the locking and releasing mechanism of the embodiment can automatically work without electric energy, and the manufacturing cost is obviously reduced.
Optionally, as shown in fig. 2 and 3, in some embodiments, the door body 4 is made of hollow stainless steel, wood or foam-filled integrally formed structure.
The beneficial effects of the above alternative embodiment are: by setting the door body 4 to be made of the above material, the manufacturing cost is reduced.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims (10)

1. An escape linkage device of an emergency evacuation channel is characterized by comprising a pedal plate (1), a locking and releasing mechanism and a door body (4), wherein the door body (4) is connected to the lower part of a cross beam (6) of a wall body in a sliding manner, the locking and releasing mechanism is arranged on the door body (4), and the pedal plate (1) is connected with the locking and releasing mechanism; when the pedal (1) is stepped on, the locking and releasing mechanism is switched from a locking state to a releasing state, so that the door body (4) is released and opened.
2. The escape linkage system of claim 1, further comprising a pulley block (5), wherein the door body (4) is slidably connected to the lower portion of the beam (6) of the wall body through the pulley block (5).
3. The escape linkage device of the emergency evacuation channel according to claim 1, wherein the locking and releasing mechanism comprises an electric control switch (2), an electromagnetic lock (3), a traction rope (7) and a counterweight (9), the electric control switch (2) is arranged below the pedal (1), the electric control switch (2) and the electromagnetic lock (3) form a closed circuit loop through a conducting wire, the electromagnetic lock (3) is magnetically adsorbed at one vertical edge of the door body (4), the other vertical edge of the door body (4) is connected with one end of the traction rope (7), and the other end of the traction rope (7) is connected with the counterweight (9); when the pedal (1) is stepped on, the electromagnetic lock (3) is powered off, the door body (4) is separated from the adsorption of the electromagnetic lock (3), and the door body (4) is opened under the action of the balance weight (9).
4. An emergency evacuation path escape linkage system according to claim 3, further comprising a fixed pulley (8), wherein the fixed pulley (8) is arranged below the beam (6) of the wall body, and the traction rope (7) is fixed on the counterweight (9) by passing around the fixed pulley (8).
5. The escape linkage system of claim 4, wherein the weight (9) has a gravity greater than the friction between the door body (4) and the cross member (6).
6. The escape linkage device of the emergency evacuation passageway according to claim 5, further comprising a reset torsion spring, wherein the reset torsion spring is arranged between the pedal (1) and the ground, and under the action of the reset torsion spring, the pedal (1) is in an initial state at a preset angle with the ground; when the pedal (1) is in an initial state, the pedal (1) is separated from the contact with the electronic control switch (2), and when the pedal (1) is stepped down, the pedal (1) is in contact with the electronic control switch (2).
7. An emergency evacuation path escape linkage according to claim 6, wherein the electrically controlled switch (2) is a normally closed switch.
8. The escape linkage system of claim 7, further comprising a storage battery, wherein the electromagnetic lock (3) is electrically connected with the storage battery, and the storage battery is a lithium battery or a lead-acid battery.
9. The escape linkage device of an emergency evacuation path according to claim 1, wherein the locking and releasing mechanism comprises a pulling rope (7), a fixed pulley (8), a spring (10) and a latch (11), the fixed pulley (8) is fixed at a cross beam (6) at the top of the wall body, the pedal (1) is connected with one end of the pulling rope (7), the other end of the pulling rope (7) is connected with the latch (11) by bypassing the fixed pulley (8), and the latch (11) is inserted into the door body (4) under the elastic force of the spring (10) to lock the door body (4); when the pedal (1) is stepped on, the bolt (11) is separated from a locking state with the door body (4).
10. The escape linkage system of claim 8 or 9 wherein the door (4) is a stainless steel integrally formed structure.
CN202110264485.5A 2021-03-11 2021-03-11 Emergency evacuation passageway escape linkage device Pending CN112943048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110264485.5A CN112943048A (en) 2021-03-11 2021-03-11 Emergency evacuation passageway escape linkage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110264485.5A CN112943048A (en) 2021-03-11 2021-03-11 Emergency evacuation passageway escape linkage device

Publications (1)

Publication Number Publication Date
CN112943048A true CN112943048A (en) 2021-06-11

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ID=76228638

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110264485.5A Pending CN112943048A (en) 2021-03-11 2021-03-11 Emergency evacuation passageway escape linkage device

Country Status (1)

Country Link
CN (1) CN112943048A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113753138A (en) * 2021-09-28 2021-12-07 一汽解放汽车有限公司 Floor escape device and passenger car
CN114320110A (en) * 2021-12-03 2022-04-12 中铁第四勘察设计院集团有限公司 Full-section intelligent flood-proof door

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113753138A (en) * 2021-09-28 2021-12-07 一汽解放汽车有限公司 Floor escape device and passenger car
CN114320110A (en) * 2021-12-03 2022-04-12 中铁第四勘察设计院集团有限公司 Full-section intelligent flood-proof door
CN114320110B (en) * 2021-12-03 2024-02-20 中铁第四勘察设计院集团有限公司 Full-section intelligent flood-proof door

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