CN213654652U - Air interchanger of civil air defense door - Google Patents

Air interchanger of civil air defense door Download PDF

Info

Publication number
CN213654652U
CN213654652U CN202022427055.4U CN202022427055U CN213654652U CN 213654652 U CN213654652 U CN 213654652U CN 202022427055 U CN202022427055 U CN 202022427055U CN 213654652 U CN213654652 U CN 213654652U
Authority
CN
China
Prior art keywords
block
rotating
vent
rod
sealing plate
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.)
Expired - Fee Related
Application number
CN202022427055.4U
Other languages
Chinese (zh)
Inventor
夏禹
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.)
Chongqing Beixin Electromechanical Co ltd
Original Assignee
Chongqing Beixin Electromechanical Co ltd
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 Chongqing Beixin Electromechanical Co ltd filed Critical Chongqing Beixin Electromechanical Co ltd
Priority to CN202022427055.4U priority Critical patent/CN213654652U/en
Application granted granted Critical
Publication of CN213654652U publication Critical patent/CN213654652U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Abstract

The utility model provides a breather of people's air defense door, set up on the door plant and communicate the preceding back wall of door plant including the vent, vent closing plate one end articulates on the door plant and can with the sealed cooperation of vent, can make the power end and the vent closing plate transmission of the sealed subassembly that opens and shuts of vent closing plate, the power take off end and the vent closing plate position of locking the subassembly of dying cooperate. The utility model discloses a rotating the hand wheel, can realizing sealing the vent and carrying out the angle and reset and lock and die, switching easy operation, the practicality is stronger.

Description

Air interchanger of civil air defense door
Technical Field
The utility model relates to a people's air defense door ventilation field, especially a breather of people's air defense door.
Background
People's air defense is also called civil defense, which is an activity that governments and organizes the masses, takes measures of preventing air attack, resisting disaster and relieving disaster, implements rescue action, and prevents and lightens the harm of the disaster. People's air defense door belongs to civil air defense protective equipment, and as the name suggests, people's air defense door is the door of civil air defense protection engineering access & exit. Most civil air defense projects are under the ground, so ventilation is often needed to keep the air in the civil air defense projects clean. The special civil air defense ventilation equipment usually uses when having no emergency and will cause the loss of equipment, so when having no emergency, carry out the taking a breath in the civil air defense engineering through the breather of setting on the civil air defense door, be convenient for reduce professional civil air defense ventilation equipment's loss, increase of service life.
The existing civil air defense door ventilation device needs to manually close the angle of the air port sealing plate and then lock the air port sealing plate, and the closing step is complex; the existing civil air defense door air interchanger is characterized in that the opening of the air port sealing plate is opened upwards, the entering air flow is guided, and partial air flow penetrates out of the civil air defense door plate from the left side and the right side of the air port sealing plate, so that the efficiency of ventilating the civil air defense door engineering is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a breather of people's air defense door for take a breath to people's air defense door.
The utility model aims at realizing the technical proposal, which comprises a ventilation opening, a ventilation opening sealing plate, an opening and closing component and a locking component;
the ventilation opening is formed in the door plate and communicated with the front wall and the rear wall of the door plate, one end of the ventilation opening sealing plate is hinged to the door plate and can be in sealing fit with the ventilation opening, the power end of the opening and closing assembly sealed by the ventilation opening sealing plate can be in transmission with the ventilation opening sealing plate, and the power output end of the locking assembly is matched with the opening and closing position of the ventilation opening sealing plate.
Preferably, a plurality of parallel air guide plates are further arranged in the ventilation opening, and an acute angle is formed between each air guide plate and the horizontal plane.
Preferably, the lower end surface of the vent sealing plate is hinged to the door panel.
Preferably, the opening and closing assembly includes: the device comprises a first sliding chute, a first sliding block, a connecting rod, an angle reset rod, a first supporting column, a first through hole, a boss, a sliding rod, a first spring, a rotating column, a rotary table, a first jacking block and a hand wheel;
the first sliding groove is formed in the door plate located on one side of the vent sealing plate, the first sliding block is arranged in the first sliding groove in a sliding mode, one end of the connecting rod is rotatably connected to the first sliding block, and the other end of the connecting rod is rotatably connected to the vent sealing plate;
a rotating column is rotatably arranged on the door plate below the vent sealing plate, the axis direction of the rotating column is perpendicular to the front wall of the door plate, a hand wheel is fixed on the top end face of the rotating column, a rotating disc is fixed on the rotating column between the hand wheel and the door plate, and a first jacking block is fixed on the rotating disc;
a first support column is fixed on the door plate between the vent sealing plate and the first top block, a first through hole penetrating through the upper end surface and the lower end surface of the first support column is formed in the first support column, an angle reset rod is slidably arranged in the first through hole, one end surface of the angle reset rod can extend out of the first support column and is matched with the vent sealing plate for angle reset, and the other end surface of the angle reset rod can correspond to the first top block;
the angle release link between first support column and the first kicking block lateral wall is last to be fixed with the boss, it is provided with the slide bar that runs through the boss to slide in the boss, the first support column of slide bar one end rigid coupling, through first spring coupling between first support column and the boss, first spring housing is established on the slide bar.
Preferably, the locking assembly comprises a left locking module and a right locking module which are bilaterally symmetrical relative to the rotating column; the left locking module and the right locking module both comprise: the second support column, the second through hole, the locking rod, the rotating block, the second sliding chute, the third sliding chute, the first rotating shaft, the second rotating shaft, the third rotating shaft, the push rod, the sleeve, the second spring, the limiting column and the second jacking block;
the second supporting column is fixed on the door plate at one side of the vent sealing plate, a second through hole penetrating through the left and right side walls is formed in the second supporting column, a locking rod is arranged in the second through hole in a sliding manner, two ends of the locking rod extend out of the second supporting column, one end of the locking rod can lock the vent sealing plate, a first rotating shaft is arranged at the other end of the locking rod in a rotating manner, the other end of the first rotating shaft is arranged in a second sliding groove in a sliding manner, the second sliding groove is formed in the upper end surface of the rotating block, a third sliding groove is further formed in the rotating block, one end of the second rotating shaft is arranged in the third sliding groove in a sliding manner, the other end of the second rotating shaft is arranged on the push rod in a rotating manner, a third rotating shaft is arranged between the second sliding groove and the third sliding groove on the rotating block in a rotating manner, the sleeve is fixed on the door plate, the push rod is further provided with a limiting column, the push rod is further sleeved with a second spring, and the second spring is connected with the limiting column and the sleeve;
the rotary table is further fixedly provided with a second ejector block, the second ejector block can be matched with the push rod, the second ejector block can eject the push rod to drive the locking rod to lock the ventilation opening sealing plate, and the minimum rotating distance from the angle reset rod to the first ejector block is smaller than the minimum rotating distance from the push rod to the second ejector block.
Preferably, the ventilation device further comprises a first limiting block and a second limiting block, the first limiting block is fixed on the turntable between the second top block of the left locking module and the first top block, and the second limiting block is fixed on the second top block of the right locking module.
Preferably, the vent sealing plate is further provided with a handle.
Preferably, a switch mark is arranged on the hand wheel.
Due to the adoption of the technical scheme, the utility model discloses following advantage has: 1. according to the ventilation opening sealing plate locking device, the rotating hand wheel is rotated to drive the rotating disc to rotate, the angle reset rod is driven to push the ventilation opening sealing plate to reset the angle of the opened ventilation opening sealing plate, the push rod is driven to move by continuous rotation, so that the limiting column is driven to lock the ventilation opening sealing plate, the ventilation opening sealing plate is closed, the angle reset and the locking of the ventilation opening sealing plate are realized simultaneously only by rotating the hand wheel, and the operation is simple; 2. this application sets up to the acute angle through leading the aerofoil in with the vent and the horizontal plane, can upwards lead the air current that gets into the vent, has promoted the efficiency of taking a breath of civil air defense door engineering.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Drawings
The drawings of the present invention are described below.
Fig. 1 is a schematic structural view of the closed state of the ventilation device of the present invention;
FIG. 2 is a partial enlarged view of the point A of the present invention;
fig. 3 is a partial enlarged view of the utility model at the position B;
fig. 4 is a front view of the opened state of the ventilation device of the present invention;
fig. 5 is a cross-sectional view at C-C of the present invention;
fig. 6 is a schematic structural diagram of the turntable of the present invention.
In the figure: 1. a vent; 2. a gas guide plate; 3. a vent seal plate; 4. a first chute; 5. a first slider; 6. a connecting rod; 7. an angle-resetting lever; 8. a first support column; 9. a first through hole; 10. a boss; 11. a slide bar; 12. a first spring; 13. rotating the column; 14. a turntable; 15. a first top block; 16. a hand wheel; 17. a second support column; 18. a second through hole; 19. a lock lever; 20. rotating the rod; 21. a second chute; 22. a third chute; 23. a first rotating shaft; 24. a second rotating shaft; 25. a third rotating shaft; 26. a push rod; 27. a sleeve; 28. a second spring; 29. a limiting column; 30. a second top block; 31. a handle; 32. a switch identifier; 33. a door panel; 34. a first stopper; 35. and a second limiting block.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 to 6, the utility model provides a ventilation device of a civil air defense door, which comprises a ventilation opening 1, a ventilation opening sealing plate 3, an opening and closing component and a locking component; the ventilation opening 1 is arranged on the door plate 33 and communicated with the front wall and the rear wall of the door plate 33, one end of the ventilation opening sealing plate 3 is hinged on the door plate and can be in sealing fit with the ventilation opening 1, the power end of the opening and closing assembly sealed by the ventilation opening sealing plate 3 can be in transmission with the ventilation opening sealing plate 3, and the power output end of the locking assembly is matched with the opening and closing position of the ventilation opening sealing plate 3.
A plurality of parallel air guide plates 2 are further arranged in the ventilation opening 1, and the air guide plates 2 form acute angles with the horizontal plane; the air guide plate 2 forms an acute angle with the horizontal plane, so that the air entering the air vent 1 can be guided upwards conveniently.
The lower end surface of the ventilation opening sealing plate 3 is hinged on the door panel 33; the vent sealing plate 3 is convenient for the vent sealing plate 3 to be opened under the action of gravity in an unlocked state.
The opening and closing assembly comprises: the device comprises a first sliding chute 4, a first sliding block 5, a connecting rod 6, an angle reset rod 7, a first supporting column 8, a first through hole 9, a boss 10, a sliding rod 11, a first spring 12, a rotating column 13, a rotating disc 14, a first jacking block 15 and a hand wheel 16; the first sliding groove 4 is formed in the door plate 33 located on one side of the vent sealing plate 3, the first sliding block 5 is arranged in the first sliding groove 4 in a sliding mode, one end of the connecting rod 6 is rotatably connected to the first sliding block 5, and the other end of the connecting rod is rotatably connected to the vent sealing plate 3; a rotating column 13 is rotatably arranged on the door panel 33 below the vent sealing plate 3, the axial direction of the rotating column 13 is perpendicular to the front wall of the door panel 33, a hand wheel 16 is fixed on the top end face of the rotating column 13, a rotating disc 14 is fixed on the rotating column 13 between the hand wheel 16 and the door panel 33, and a first jacking block 15 is fixed on the rotating disc 14; a first support column 8 is fixed on a door plate 33 between the vent sealing plate 3 and the first top block 15, a first through hole 9 penetrating through the upper end surface and the lower end surface of the first support column 8 is formed in the first support column 8, an angle reset rod 7 is slidably arranged in the first through hole 9, one end surface of the angle reset rod 7 can extend out of the first support column 8 and is matched with the vent sealing plate 3 for angle reset, and the other end surface of the angle reset rod 7 can correspond to the first top block 15; a boss 10 is fixed on the side wall of the angle reset rod 7 between the first support column 8 and the first top block 15, a slide rod 11 penetrating through the boss 10 is arranged in the boss 10 in a sliding manner, one end of the slide rod 11 is fixedly connected with the first support column 8, the first support column 8 is connected with the boss 10 through a first spring 12, and the slide rod 11 is sleeved with the first spring 12; when the vent sealing plate 3 needs to be opened, the hand wheel 16 is rotated in the forward direction to drive the rotary table 14 to rotate, the angle reset rod 7 is driven to be disengaged from the first jacking block 15, the angle reset rod 7 is made to slide downwards along the first support column 8, the upper end of the angle reset rod 7 is made to slide out of the range of the vent sealing plate 3, the vent sealing plate 3 is unlocked, when the vent sealing plate 3 is unlocked, the vent sealing plate 3 rotates downwards under the action of gravity to drive the first sliding block 5 to slide downwards along the first sliding groove 4, and the opening angle of the vent sealing plate 3 is limited through the connecting rod 6 connecting the first sliding block 5 and the vent sealing plate 3; when the vent sealing plate 3 needs to be closed, the hand wheel 16 is rotated reversely, the angle release rod 7 is driven to be matched with the first jacking block 15, the angle release rod 7 slides upwards along the first supporting column 8, and the upper end of the angle release rod 7 is matched with the vent sealing plate 3 again.
The locking assembly comprises a left locking module and a right locking module which are bilaterally symmetrical relative to the rotating column 13; the left locking module and the right locking module both comprise: the device comprises a second supporting column 17, a second through hole 18, a locking rod 19, a rotating block 20, a second sliding chute 21, a third sliding chute 22, a first rotating shaft 23, a second rotating shaft 24, a third rotating shaft 25, a push rod 26, a sleeve 27, a second spring 28, a limiting column 29 and a second ejector block 30; the second supporting column 17 is fixed on a door panel 33 on one side of the vent sealing plate 3, the second supporting column 17 is provided with a second through hole 18 penetrating through the left and right side walls, a locking rod 19 is arranged in the second through hole 18 in a sliding manner, two ends of the locking rod 19 extend out of the second supporting column 17, one end of the locking rod can lock the vent sealing plate 3, the other end of the locking rod is rotatably provided with a first rotating shaft 23, the other end of the first rotating shaft 23 is slidably arranged in a second sliding groove 21, the second sliding groove 21 is arranged on the upper end surface of a rotating block 20, the rotating block 20 is further provided with a third sliding groove 22, one end of the third rotating shaft 24 is arranged in the third sliding groove 22 in a sliding manner, the other end of the second rotating shaft 24 is rotatably arranged on a push rod 26, a third rotating shaft 25 is rotatably arranged between the second sliding groove 21 and the third sliding groove 22 on the rotating block 20, and, the push rod 26 is slidably arranged in the sleeve 27, one end of the push rod extends out of the sleeve 27, the sleeve 27 is fixed on the door plate 33, the push rod 26 is further provided with a limiting column 29, the push rod 26 is further sleeved with a second spring 28, and the second spring 28 is connected with the limiting column 29 and the sleeve 27; a second ejector block 30 is further fixed on the rotary disc 14, the second ejector block 30 can be matched with the push rod 26, the second ejector block 30 can push the push rod 26 to drive the locking rod 19 to lock the ventilation opening sealing plate 3, and the minimum rotating distance from the angle reset rod 7 to the first ejector block 15 is smaller than the minimum rotating distance from the push rod 26 to the second ejector block 30;
when the vent sealing plate 3 needs to be locked, the hand wheel 16 is rotated in the reverse direction, the rotation of the rotary disc 14 simultaneously drives the first ejector block 15 and the second ejector block 30 to rotate, the first ejector block 15 is firstly matched with the angle reset rod 7, the opened vent sealing plate 3 can be reset in an angle mode, the hand wheel 16 continues to be rotated, the second ejector block 30 can push the push rod 26 to move, the second spring 28 can be compressed, the push rod 26 can be moved, the rotating block 20 can be driven to rotate, the locking rod 19 can be driven to move through the first rotating shaft 23, and therefore the vent sealing plate 3 is locked.
The ventilation device further comprises a first limiting block 34 and a second limiting block 35, the first limiting block 34 is fixed on the turntable 14 between the second top block 30 and the first top block 15 of the left locking module, and the second limiting block 35 is fixed on the second top block 30 of the right locking module; the first stopper 34 is used to limit the maximum clockwise rotation angle of the rotary disk 14 when the vent sealing plate 3 is opened, and the second stopper 35 is used to limit the maximum counterclockwise rotation angle of the rotary disk 14 when the vent sealing plate 3 is closed.
The ventilation opening sealing plate 3 is also provided with a handle 31; the handle 31 facilitates manual opening or closing of the vent sealing plate 3.
A switch mark 32 is arranged on the hand wheel 16; the switch identification 32 is used to indicate the direction of the switch.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims (8)

1. The air interchanger of the civil air defense door is characterized in that the air interchanger comprises a vent (1), a vent sealing plate (3), an opening and closing component and a locking component;
vent (1) are seted up on door plant (33) and are linked up the front and back wall of door plant (33), vent closing plate (3) one end articulates on the door plant and can be sealed cooperation with vent (1), can make the power end and the vent closing plate (3) transmission of the sealed subassembly that opens and shuts of vent closing plate (3), the power take off end and the vent closing plate (3) position of opening and shutting of the dead subassembly of lock cooperate.
2. The ventilation device of the civil air defense door according to the claim 1, characterized in that a plurality of air guide plates (2) which are parallel to each other are arranged in the ventilation opening (1), and the air guide plates (2) form an acute angle with the horizontal plane.
3. A ventilation device for a civil air defense door according to claim 1, characterized in that the lower end face of the vent sealing plate (3) is hinged on the door panel (33).
4. A ventilation device for a civil air defense door according to claim 3, characterized in that the opening and closing assembly comprises: the device comprises a first sliding groove (4), a first sliding block (5), a connecting rod (6), an angle reset rod (7), a first supporting column (8), a first through hole (9), a boss (10), a sliding rod (11), a first spring (12), a rotating column (13), a rotating disc (14), a first ejector block (15) and a hand wheel (16);
the first sliding groove (4) is formed in the door panel (33) located on one side of the vent sealing plate (3), the first sliding block (5) is arranged in the first sliding groove (4) in a sliding mode, one end of the connecting rod (6) is rotatably connected to the first sliding block (5), and the other end of the connecting rod is rotatably connected to the vent sealing plate (3);
a door panel (33) below the vent sealing plate (3) is rotatably provided with a rotating column (13), the axial direction of the rotating column (13) is perpendicular to the front wall of the door panel (33), a hand wheel (16) is fixed on the top end face of the rotating column (13), a rotating disc (14) is fixed on the rotating column (13) between the hand wheel (16) and the door panel (33), and a first jacking block (15) is fixed on the rotating disc (14);
a first supporting column (8) is fixed on a door plate (33) between the vent sealing plate (3) and the first ejector block (15), a first through hole (9) penetrating through the upper end surface and the lower end surface of the first supporting column (8) is formed in the first supporting column (8), an angle reset rod (7) is slidably arranged in the first through hole (9), one end surface of the angle reset rod (7) can extend out of the first supporting column (8) and is matched with the vent sealing plate (3) for angle reset, and the other end surface of the angle reset rod (7) can correspond to the first ejector block (15);
be fixed with boss (10) on angle release link (7) lateral wall between first support column (8) and first kicking block (15), it is provided with slide bar (11) that run through boss (10) to slide in boss (10), the first support column (8) of slide bar (11) one end rigid coupling, be connected through first spring (12) between first support column (8) and boss (10), first spring (12) cover is established on slide bar (11).
5. A ventilation device of a civil air defense door according to claim 4, characterized in that the locking assembly comprises a left locking module and a right locking module which are bilaterally symmetrical relative to the rotating column (13); the left locking module and the right locking module both comprise: the device comprises a second supporting column (17), a second through hole (18), a locking rod (19), a rotating block (20), a second sliding groove (21), a third sliding groove (22), a first rotating shaft (23), a second rotating shaft (24), a third rotating shaft (25), a push rod (26), a sleeve (27), a second spring (28), a limiting column (29) and a second ejector block (30);
the second supporting column (17) is fixed on a door plate (33) on one side of the vent sealing plate (3), a second through hole (18) penetrating through the left side wall and the right side wall is formed in the second supporting column (17), a locking rod (19) is arranged in the second through hole (18) in a sliding manner, two ends of the locking rod (19) extend out of the second supporting column (17), one end of the locking rod can lock the vent sealing plate (3), a first rotating shaft (23) is arranged at the other end of the locking rod in a rotating manner, the other end of the first rotating shaft (23) is arranged in a second sliding groove (21) in a sliding manner, the second sliding groove (21) is formed in the upper end face of a rotating block (20), a third sliding groove (22) is further formed in the rotating block (20), one end of a second rotating shaft (24) is arranged in the third sliding groove (22) in a sliding manner, and the other end of the second rotating shaft (, a third rotating shaft (25) is rotatably arranged between the second sliding chute (21) and the third sliding chute (22) on the rotating block (20), the third rotating shaft (25) is fixed on the door plate (33), the push rod (26) is slidably arranged in the sleeve (27), one end of the push rod extends out of the sleeve (27), the sleeve (27) is fixed on the door plate (33), a limiting column (29) is further arranged on the push rod (26), a second spring (28) is further sleeved on the push rod (26), and the second spring (28) is connected with the limiting column (29) and the sleeve (27);
the rotary table (14) is further fixedly provided with a second ejector block (30), the second ejector block (30) can be matched with the push rod (26), the second ejector block (30) can eject the push rod (26) to drive the locking rod (19) to lock the ventilation opening sealing plate (3), and the minimum rotating distance from the angle reset rod (7) to the first ejector block (15) is smaller than the minimum rotating distance from the push rod (26) to the second ejector block (30).
6. The ventilation device of the civil air defense door as claimed in claim 5, characterized in that the ventilation device further comprises a first limiting block (34) and a second limiting block (35), the first limiting block (34) is fixed on the turntable (14) between the second top block (30) and the first top block (15) of the left locking module, and the second limiting block (35) is fixed on the second top block (30) of the right locking module.
7. A ventilation device for a civil air defense door according to claim 3, characterized in that the ventilation opening sealing plate (3) is further provided with a handle (31).
8. A ventilation device of a civil air defense door according to claim 4, characterized in that the hand wheel (16) is provided with a switch mark (32).
CN202022427055.4U 2020-10-28 2020-10-28 Air interchanger of civil air defense door Expired - Fee Related CN213654652U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022427055.4U CN213654652U (en) 2020-10-28 2020-10-28 Air interchanger of civil air defense door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022427055.4U CN213654652U (en) 2020-10-28 2020-10-28 Air interchanger of civil air defense door

Publications (1)

Publication Number Publication Date
CN213654652U true CN213654652U (en) 2021-07-09

Family

ID=76704055

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022427055.4U Expired - Fee Related CN213654652U (en) 2020-10-28 2020-10-28 Air interchanger of civil air defense door

Country Status (1)

Country Link
CN (1) CN213654652U (en)

Similar Documents

Publication Publication Date Title
CN112351611B (en) Outdoor comprehensive cabinet capable of adjusting space according to size of battery pack
CN213654652U (en) Air interchanger of civil air defense door
CN211266132U (en) Electrical box for electrical engineering
CN209509738U (en) A kind of headstock gear of automatically controlled airtight blast door
CN216517637U (en) Civil air defense door with ventilation device
CN215185161U (en) Low-voltage capacitor box compensation device
CN213063391U (en) Composite function radiation shielding opening and closing device
CN210273086U (en) Push-pull type direct current power cabinet
CN209799704U (en) Automatic change people's air defense door
CN207228827U (en) A kind of locking system for fire window
CN208647099U (en) A kind of four handle type hatch boards
CN217106505U (en) Lock body structure of casement window
CN112736697A (en) Electronic power distribution cabinet convenient to overhaul
CN220108359U (en) Water conservancy pump station control box convenient to maintain
CN214330408U (en) Airtight door structure
CN221169043U (en) Clutch
CN211011545U (en) Stable lampblack absorber of anti-return
CN214949561U (en) Automatic ventilation device for elevator and elevator
CN212177983U (en) Non-deformable's valve box
CN218467454U (en) Aluminum alloy door and window convenient to disassemble and assemble
CN217056356U (en) Novel pneumatic fire prevention valve
CN214006973U (en) Quick-closing fireproof door
CN221257786U (en) Safety valve for oxygen pressure relief
CN220379841U (en) Vertical cabinet type air conditioner convenient to overhaul
CN214786966U (en) Waterproof passage door for underground parking lot

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210709