CN108678797B - Windproof door - Google Patents
Windproof door Download PDFInfo
- Publication number
- CN108678797B CN108678797B CN201810665709.1A CN201810665709A CN108678797B CN 108678797 B CN108678797 B CN 108678797B CN 201810665709 A CN201810665709 A CN 201810665709A CN 108678797 B CN108678797 B CN 108678797B
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- Prior art keywords
- air door
- door
- screw
- slide
- sliding
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- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 14
- 210000002105 tongue Anatomy 0.000 description 8
- 230000002452 interceptive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
- E05F15/668—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
- E05F15/668—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings
- E05F15/673—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings operated by screw-and-nut mechanisms
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2999/00—Subject-matter not otherwise provided for in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention provides a windproof door which comprises a first air door and a second air door which are parallel to the cross section of a coal mine passage, wherein the first air door and the second air door respectively slide up and down in a first sliding groove and a second sliding groove above the passage; the driving mechanism comprises a first screw vertically penetrating through the first sliding cavity and in threaded connection with the first sliding block, a second screw vertically penetrating through the second sliding cavity and in threaded connection with the second sliding block, and a motor in driving connection with the second screw, wherein the thread directions of the first screw and the second screw are opposite, driving wheels are arranged at the bottoms of the first screw and the second screw, and the driving wheels are in transmission connection through a driving belt. The device has the advantages of simple structure, convenient operation, no occupation of the inner space of the roadway, and higher reliability and stability.
Description
Technical Field
The invention relates to a windproof door.
Background
The windproof door is important equipment for isolating wind flow and passing vehicles and pedestrians under a coal mine, and mainly realizes the control of the underground wind flow. And the colliery is air door in the pit requires to arrange two doors at least, under the condition that one air door was closed, could realize the opening of another door, and two doors can not open simultaneously promptly, otherwise leads to leaking out or the short circuit of wind current, influences mine ventilation system. In the prior art, in order to realize the purpose that two air doors can not be opened simultaneously, the interactive mechanical interlocking setting is usually adopted, when one air door is in the open state, the other air door is in the closed state, and in the design of an interlocking device, the pulley and a locker are mostly adopted to realize interlocking, and the structure mainly has the following problems in the practical use: the pulley and the locker are adopted to carry out interactive interlocking on the two air doors, the structure is complex, the reliability is poor, and the device is frequently maintained and replaced; adopt pulley and locker to carry out interactive interlocking to two fan doors, its structure sets up above the air door mostly, occupies underworkings space, causes hindrance and interference to the tunnelling exploitation and transportation etc. in colliery.
Disclosure of Invention
The invention aims to provide a windproof door which comprises a first air door 1 and a second air door 2 parallel to the cross section of a coal mine passage, wherein the first air door 1 and the second air door 2 respectively slide up and down in a first sliding groove 13 and a second sliding groove 23 above the passage, a first sliding cavity 12 for a first sliding block 11 to slide up and down is arranged in the first air door 1, and a second sliding cavity 22 for a second sliding block 21 to slide up and down is arranged in the second air door 2; the device further comprises a driving mechanism 3, wherein the driving mechanism 3 comprises a first screw 31 vertically penetrating through the first sliding cavity 12 and in threaded connection with the first sliding block 11, a second screw 32 vertically penetrating through the second sliding cavity 22 and in threaded connection with the second sliding block 21, and a motor 33 in driving connection with the second screw 24, the thread directions of the first screw 31 and the second screw 32 are opposite, driving wheels 34 are arranged at the bottoms of the first screw 31 and the second screw 32, and the driving wheels 34 are in transmission connection through a driving belt 35. The top ends of the first screw 31 and the second screw 32 are inserted into the bearings above the channel, and the bottom ends are inserted into the bearings below the channel.
In an initial state, the first air door 1 and the second air door 2 are both in a closed state, the first slider 11 is positioned at the top of the first sliding cavity 12, and the second slider 21 is positioned at the top of the second sliding cavity 22; when the first air door 1 needs to be opened first for people and/or objects to enter and exit, the motor 33 drives the second screw rod 32 to rotate so as to enable the second slide block 21 to slide downwards, and simultaneously drives the first screw rod 31 to rotate under the action of the driving wheel 34 and the driving belt 35 so as to enable the first slide block 11 to slide upwards, the first slide block 11 pulls the first air door 1 upwards to slide to the limit position along with the force, then waits for people and/or objects to enter the passage position between the first air door 1 and the second air door 2 through the first air door 1, after the first air door is in place, the motor 33 drives the second screw rod 32 to rotate so as to enable the second slide block 21 to slide upwards, and simultaneously drives the first screw rod 31 to rotate under the action of the driving wheel 34 and the driving belt 35 so as to enable the first slide block 11 to slide downwards, the second sliding block 21 pulls the second air door 2 upwards to slide to the limit position, and then after people and/or objects pass through the second air door 2 and reach the right side of the passage, the motor 33 drives the second screw rod 32 to rotate, so that the second sliding block 21 slides downwards until the second air door 2 is closed, and simultaneously drives the first screw rod 31 to rotate under the action of the driving wheel 34 and the driving belt 35, so that the first sliding block 11 slides upwards to the top of the first sliding cavity 12, and returns to the initial state. When the second air door 2 needs to be opened first for people and/or things to enter and exit, the operation is reversed according to the steps.
In an embodiment of the present invention, a third sliding groove 45 perpendicular to the first air door 1 and the second air door 2 is disposed between the first sliding groove 13 and the second sliding groove 23, a lock body 4 is disposed in the third sliding groove 45, two ends of the lock body 4 are provided with locking tongues 41, a lower end surface of the lock body 4 is flush with an upper end surface of the first air door 1 or the second air door 2 in a closed state, and the locking tongues 41 extend to limit the first air door 1 or the second air door 2 to slide upwards.
In an initial state, the first air door 1 and the second air door 2 are both in a closed state, and the lock body 4 is located at a middle position; when the first air door 1 needs to be opened for people and/or objects to enter and exit, the lock body 4 slides rightwards along with the upward sliding of the first air door 1, and the right end lock tongue 41 locks the second air door 2; when the second air door 2 needs to be opened for people and/or things to enter and exit, the lock body 4 slides leftwards along with the upward sliding of the second air door 2, and the left end bolt 41 locks the first air door 1 along with the sliding.
In one embodiment of the present invention, the lock body 4 is an inverted isosceles trapezoid, and the side surface of the lock tongue 41 is the waist of the isosceles trapezoid.
The inverted isosceles trapezoid is inclined, so that the lock body 4 is conveniently pushed to slide rightwards or leftwards when the first air door 1 or the second air door 2 slides upwards.
In one embodiment of the present invention, a small roller is disposed on the right side of the top end of the first damper 1 and/or the left side of the top end of the second damper 2, and a small roller is also disposed on the end of the latch tongue 41, as shown in fig. 4, and the small roller can roll along the inclined surface of the latch tongue 41 to reduce friction.
In an embodiment of the present invention, the middle portion of the lock body 4 is fixedly connected to the third sliding block 42, the third sliding block 42 is sleeved on the first sliding rod 43, the first sliding rods 43 on the left and right sides of the third sliding block 42 are further sleeved with the return spring 44, and the first sliding rods 43 are fixed in the fourth sliding groove 46 above or below the third sliding groove 45.
The return spring 44 can timely return the lock body 4, so that the normal operation of the air door device is not affected on the premise of realizing the function of locking the first air door 1 or the second air door 2.
In one embodiment of the present invention, a ground groove 5 is provided on the ground right below the first damper 1 and the second damper 2, and is used for limiting and sealing when the first damper 1 and/or the second damper 2 is closed.
The geosyncline 5 can further play a role in sealing to prevent air circulation besides the limiting function.
In one embodiment of the present invention, two sets of driving mechanisms 3 are respectively disposed on the front and rear sides of the first damper 1 and the second damper 2, and the motors 33 in the two sets of driving mechanisms 3 are synchronously driven.
The two sets of driving mechanisms 3 enable the air door device to be safer and more stable.
By adopting the technical scheme of the invention, the following beneficial technical effects are achieved:
1. the driving structures 3 in the device are positioned above and below the channel, so that the device does not occupy the internal space of the tunnel, has a simple structure, is convenient to operate, is beneficial to optimizing and reasonably distributing narrow space in the channel, and improves the coal mining efficiency;
2. the driving mechanism 3 comprising the first screw 31 and the second screw 32 improves the reliability and stability of the device;
3. the design of the lock body 4 in the device can ensure that at least one of the first air door 1 and the second air door 2 is stably in a closed state, and the safety and reliability of the device are ensured.
Drawings
FIG. 1 is a schematic structural view illustrating a closed state of a windproof door according to the present invention;
FIG. 2 is a schematic structural diagram of the second damper 2 of the wind-proof door disclosed by the invention;
FIG. 3 is a schematic top view of a windproof door according to the present invention;
fig. 4 is a schematic structural diagram of a locking tongue 41 disclosed in the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
The embodiment provides a windproof door, which comprises a first air door 1 and a second air door 2 parallel to the cross section of a coal mine passage, wherein the first air door 1 and the second air door 2 respectively slide up and down in a first sliding groove 13 and a second sliding groove 23 above the passage, a first sliding cavity 12 for a first sliding block 11 to slide up and down is arranged in the first air door 1, and a second sliding cavity 22 for a second sliding block 21 to slide up and down is arranged in the second air door 2; the device further comprises a driving mechanism 3, wherein the driving mechanism 3 comprises a first screw 31 vertically penetrating through the first sliding cavity 12 and in threaded connection with the first sliding block 11, a second screw 32 vertically penetrating through the second sliding cavity 22 and in threaded connection with the second sliding block 21, and a motor 33 in driving connection with the second screw 24, the thread directions of the first screw 31 and the second screw 32 are opposite, driving wheels 34 are arranged at the bottoms of the first screw 31 and the second screw 32, and the driving wheels 34 are in transmission connection through a driving belt 35.
Example 2
As shown in fig. 1-2, the present embodiment provides a windproof door, which includes a first air door 1 and a second air door 2 parallel to a cross section of a coal mine passage, where the first air door 1 and the second air door 2 slide up and down in a first chute 13 and a second chute 23 above the passage, respectively, a first sliding cavity 12 for a first slider 11 to slide up and down is provided in the first air door 1, and a second sliding cavity 22 for a second slider 21 to slide up and down is provided in the second air door 2; the device further comprises a driving mechanism 3, wherein the driving mechanism 3 comprises a first screw 31 vertically penetrating through the first sliding cavity 12 and in threaded connection with the first sliding block 11, a second screw 32 vertically penetrating through the second sliding cavity 22 and in threaded connection with the second sliding block 21, and a motor 33 in driving connection with the second screw 24, the thread directions of the first screw 31 and the second screw 32 are opposite, driving wheels 34 are arranged at the bottoms of the first screw 31 and the second screw 32, and the driving wheels 34 are in transmission connection through a driving belt 35. Be equipped with the third spout 45 of the first air door 1 of perpendicular to and second air door 2 between first spout 13 and the second spout 23, be equipped with lock body 4 in the third spout 45, the both ends of lock body 4 are equipped with spring bolt 41, the up end parallel and level when the lower terminal surface of lock body 4 and first air door 1 or second air door 2 are in the closed condition, spring bolt 41 stretches out the first air door 1 of restriction or the 2 upwards slideings of second air door. The middle part of the lock body 4 is fixedly connected with a third sliding block 42, the third sliding block 42 is sleeved on a first sliding rod 43, a return spring 44 is further sleeved on the first sliding rods 43 on the left side and the right side of the third sliding block 42, and the first sliding rod 43 is fixed in a fourth sliding groove 46 above a third sliding groove 45.
Example 3
As shown in fig. 1-2 and 4, the present embodiment provides a windproof door, which includes a first air door 1 and a second air door 2 parallel to a cross section of a coal mine passage, where the first air door 1 and the second air door 2 respectively slide up and down in a first chute 13 and a second chute 23 above the passage, a first sliding cavity 12 for a first sliding block 11 to slide up and down is provided in the first air door 1, and a second sliding cavity 22 for a second sliding block 21 to slide up and down is provided in the second air door 2; the device further comprises a driving mechanism 3, wherein the driving mechanism 3 comprises a first screw 31 vertically penetrating through the first sliding cavity 12 and in threaded connection with the first sliding block 11, a second screw 32 vertically penetrating through the second sliding cavity 22 and in threaded connection with the second sliding block 21, and a motor 33 in driving connection with the second screw 24, the thread directions of the first screw 31 and the second screw 32 are opposite, driving wheels 34 are arranged at the bottoms of the first screw 31 and the second screw 32, and the driving wheels 34 are in transmission connection through a driving belt 35. Be equipped with the third spout 45 of the first air door 1 of perpendicular to and second air door 2 between first spout 13 and the second spout 23, be equipped with lock body 4 in the third spout 45, the both ends of lock body 4 are equipped with spring bolt 41, the up end parallel and level when the lower terminal surface of lock body 4 and first air door 1 or second air door 2 are in the closed condition, spring bolt 41 stretches out the first air door 1 of restriction or the 2 upwards slideings of second air door. The lock body 4 is an inverted isosceles trapezoid, and the side surface of the lock tongue 41 is the waist of the isosceles trapezoid.
Example 4
As shown in fig. 1-2, the present embodiment provides a windproof door, which includes a first air door 1 and a second air door 2 parallel to a cross section of a coal mine passage, where the first air door 1 and the second air door 2 slide up and down in a first chute 13 and a second chute 23 above the passage, respectively, a first sliding cavity 12 for a first slider 11 to slide up and down is provided in the first air door 1, and a second sliding cavity 22 for a second slider 21 to slide up and down is provided in the second air door 2; the device further comprises a driving mechanism 3, wherein the driving mechanism 3 comprises a first screw 31 vertically penetrating through the first sliding cavity 12 and in threaded connection with the first sliding block 11, a second screw 32 vertically penetrating through the second sliding cavity 22 and in threaded connection with the second sliding block 21, and a motor 33 in driving connection with the second screw 24, the thread directions of the first screw 31 and the second screw 32 are opposite, driving wheels 34 are arranged at the bottoms of the first screw 31 and the second screw 32, and the driving wheels 34 are in transmission connection through a driving belt 35. Ground under first air door 1 and the second air door 2 is equipped with geosyncline 5 for carry on spacingly and sealed when closing first air door 1 and/or the second air door 2.
Example 5
As shown in fig. 1-3, the embodiment provides a windproof door, which includes a first air door 1 and a second air door 2 parallel to a cross section of a coal mine passage, where the first air door 1 and the second air door 2 slide up and down in a first chute 13 and a second chute 23 above the passage, respectively, a first sliding cavity 12 for a first slider 11 to slide up and down is provided in the first air door 1, and a second sliding cavity 22 for a second slider 21 to slide up and down is provided in the second air door 2; the device further comprises a driving mechanism 3, wherein the driving mechanism 3 comprises a first screw 31 vertically penetrating through the first sliding cavity 12 and in threaded connection with the first sliding block 11, a second screw 32 vertically penetrating through the second sliding cavity 22 and in threaded connection with the second sliding block 21, and a motor 33 in driving connection with the second screw 24, the thread directions of the first screw 31 and the second screw 32 are opposite, driving wheels 34 are arranged at the bottoms of the first screw 31 and the second screw 32, and the driving wheels 34 are in transmission connection through a driving belt 35. Two sets of driving mechanisms 3 are respectively arranged on the front side and the rear side of the first air door 1 and the second air door 2, and motors 33 in the two sets of driving mechanisms 3 are synchronously driven.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a prevent wind door which characterized in that: the coal mine ventilation system comprises a first air door (1) and a second air door (2) which are parallel to the cross section of a coal mine passage, wherein the first air door (1) and the second air door (2) respectively slide up and down in a first sliding groove (13) and a second sliding groove (23) above the passage, a first sliding cavity (12) for a first sliding block (11) to slide up and down is arranged in the first air door (1), and a second sliding cavity (22) for a second sliding block (21) to slide up and down is arranged in the second air door (2); still include actuating mechanism (3), actuating mechanism (3) are including vertical first screw rod (31) that pass through first smooth chamber (12) and pass through threaded connection with first slider (11), vertical second screw rod (32) that pass through second smooth chamber (22) and pass through threaded connection with second slider (21), and motor (33) with second screw rod (32) drive connection, the screw direction of first screw rod (31) and second screw rod (32) is opposite, and first screw rod (31) and second screw rod (32) bottom all are equipped with drive wheel (34), connects through drive belt (35) transmission between drive wheel (34).
2. The weatherproof door of claim 1, wherein: be equipped with third spout (45) of the first air door of perpendicular to (1) and second air door (2) between first spout (13) and second spout (23), be equipped with lock body (4) in third spout (45), the both ends of lock body (4) are equipped with spring bolt (41), the up end parallel and level when the lower terminal surface of lock body (4) and first air door (1) or second air door (2) are in the closed condition, spring bolt (41) are stretched out and are restricted first air door (1) or second air door (2) and upwards slide.
3. The weatherproof door of claim 2, wherein: the lock body (4) is an inverted isosceles trapezoid, and the side surface of the lock tongue (41) is the waist of the isosceles trapezoid.
4. The weatherproof door of claim 2, wherein: the lock body (4) middle part and third slider (42) fixed connection, third slider (42) cover is established on first slide bar (43), and still overlaps on first slide bar (43) on the left and right sides of third slider (42) and is equipped with reset spring (44), and first slide bar (43) are fixed in fourth spout (46) above or below third spout (45).
5. The weatherproof door of claim 1, wherein: ground under first air door (1) and second air door (2) is equipped with geosyncline (5) for carry on spacingly and sealed when closing first air door (1) and/or second air door (2).
6. The weatherproof door of claim 1, wherein: two sets of driving mechanisms (3) are respectively arranged on the front side and the rear side of the first air door (1) and the second air door (2), and motors (33) in the two sets of driving mechanisms (3) are driven synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810665709.1A CN108678797B (en) | 2018-06-26 | 2018-06-26 | Windproof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810665709.1A CN108678797B (en) | 2018-06-26 | 2018-06-26 | Windproof door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678797A CN108678797A (en) | 2018-10-19 |
| CN108678797B true CN108678797B (en) | 2020-05-01 |
Family
ID=63812229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810665709.1A Active CN108678797B (en) | 2018-06-26 | 2018-06-26 | Windproof door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108678797B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520009B (en) * | 2020-04-27 | 2021-08-27 | 煤炭科学技术研究院有限公司 | Air door locking device capable of remotely unlocking in underground coal mine |
| CN112051607B (en) * | 2020-09-14 | 2023-09-26 | 四川省公路规划勘察设计研究院有限公司 | Geophone device for in-hole geophysical exploration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB520763A (en) * | 1937-11-02 | 1940-05-02 | Demag Ag | Air and like locks, particularly for use in mines |
| CN204877525U (en) * | 2015-08-23 | 2015-12-16 | 河南理工大学 | Auto -induction open -close type air door in pit |
| CN206376892U (en) * | 2017-01-20 | 2017-08-04 | 张雪峰 | A kind of coal mine ventilation door blocking device |
| CN206987873U (en) * | 2017-07-24 | 2018-02-09 | 赵亚俊 | A kind of mine air door locking device |
| CN107829782A (en) * | 2017-11-15 | 2018-03-23 | 黄河勘测规划设计有限公司 | The antifreeze method in cold district water conservancy highway engineering tunnel |
| CN107989644A (en) * | 2018-01-31 | 2018-05-04 | 张雪峰 | A kind of coal mine underground air door blocking device |
-
2018
- 2018-06-26 CN CN201810665709.1A patent/CN108678797B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB520763A (en) * | 1937-11-02 | 1940-05-02 | Demag Ag | Air and like locks, particularly for use in mines |
| CN204877525U (en) * | 2015-08-23 | 2015-12-16 | 河南理工大学 | Auto -induction open -close type air door in pit |
| CN206376892U (en) * | 2017-01-20 | 2017-08-04 | 张雪峰 | A kind of coal mine ventilation door blocking device |
| CN206987873U (en) * | 2017-07-24 | 2018-02-09 | 赵亚俊 | A kind of mine air door locking device |
| CN107829782A (en) * | 2017-11-15 | 2018-03-23 | 黄河勘测规划设计有限公司 | The antifreeze method in cold district water conservancy highway engineering tunnel |
| CN107989644A (en) * | 2018-01-31 | 2018-05-04 | 张雪峰 | A kind of coal mine underground air door blocking device |
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| Publication number | Publication date |
|---|---|
| CN108678797A (en) | 2018-10-19 |
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Effective date of registration: 20200116 Address after: Ganquan road Shushan District of Hefei City, Anhui Province, 230000 West hillock road to the South Wild Garden commercial office building room B-1512 Applicant after: Anhui Eagle Dragon Industrial Design Co., Ltd. Address before: 315040 Jiangnan Road No. 586, Ningbo High-tech Zone, Zhejiang Province Applicant before: Ningbo bochai Robot Technology Co., Ltd. |
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Effective date of registration: 20200403 Address after: 401420 Pingshan group, Pingshan Industrial Park, Wansheng Economic Development Zone, Qijiang District, Chongqing Applicant after: Chongqing high tech curtain wall doors and windows Co., Ltd Address before: Ganquan road Shushan District of Hefei City, Anhui Province, 230000 West hillock road to the South Wild Garden commercial office building room B-1512 Applicant before: ANHUI YINGLONG INDUSTRIAL DESIGN Co.,Ltd. |
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