CN206591977U - Mining well lid explosion protection system and mine anti-explosion well lid - Google Patents
Mining well lid explosion protection system and mine anti-explosion well lid Download PDFInfo
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- CN206591977U CN206591977U CN201720313574.3U CN201720313574U CN206591977U CN 206591977 U CN206591977 U CN 206591977U CN 201720313574 U CN201720313574 U CN 201720313574U CN 206591977 U CN206591977 U CN 206591977U
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- well lid
- mining well
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- protection system
- spring
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Abstract
The utility model provides a kind of mining well lid explosion protection system and mine anti-explosion well lid, is related to safety of coal mines safeguard technical field.Mining well lid explosion protection system includes weight support, pulley located at both sides at the top of weight support, it is connected and sequentially passes through the rope of two pulleys with mining well lid, and the balance weight being connected with rope away from the free end of mining well lid, the first spring being sheathed on the outside of rope is connected between the pulley of mining well lid and close mining well lid, solve present in prior art when explosion accident occurs for mine, Antiexplosive manhole cover is easily blown up, the technical problem that safety of life and property to people threatens, by setting the first spring to reduce the possibility that mining well lid is blown up between mining well lid and pulley, it ensure that the normal operation of mine ventilation system, the safety of life and property of people is ensured.
Description
Technical field
The utility model is related to safety of coal mines safeguard technical field, more particularly, to a kind of mining well lid explosion protection system
And mine anti-explosion well lid.
Background technology
In coal mining, complete ventilating system is the premise of safety of coal mines exploitation, the normal operation of chief ventilators
The supply of underground fresh air has been ensured, the life security of underground work personnel is directly related to, and Antiexplosive manhole cover is used as protection
The indispensable device of mine ventilation system, is increasingly protruded, Antiexplosive manhole cover is made in the effect for ensureing mine ventilation system operation
One of auxiliary equipment for ventilation blower, its main function is gas to occur in underground or during coal-dust explosion, Antiexplosive manhole cover can and
When open carry out pressure release, it is to avoid blast produce high-pressure gas wave shock wave destruction chief ventilators, the life to underground work personnel
Life safety threatens.
At present, the mining well lid generally used in the numerous colliery of China is this explosion-proof for traditional bell Antiexplosive manhole cover
Well lid is mainly made up of mining well lid, balance weight, pulley, sealed liquid cell and presser feet, when explosion time occurs for underground, due to impact
The unpredictability of wave energy, mining well lid is very likely blown up, and influences the normal operation of mine ventilation system, due to blast
When underground oxygen content drastically decline, the life security to underground work personnel threatens, and well lid is blown up and easily caused
Secondary injury, seriously threatens the safety of life and property of people.
Utility model content
The purpose of this utility model is to provide a kind of mining well lid explosion protection system and mine anti-explosion well lid, existing to solve
Present in technology when explosion accident occurs for mine, Antiexplosive manhole cover is easily blown up, and the safety of life and property to people is made
Into the technical problem of threat.
The mining well lid explosion protection system that the utility model is provided includes weight support, located at both sides at the top of the weight support
Pulley, the rope that is connected with mining well lid and sequentially passes through two pulleys and with the rope away from described mining
The connected balance weight in the free end of well lid；
It is connected with and is sheathed on the outside of the rope between the pulley of the mining well lid and the close mining well lid
The first spring.
Further, in addition to the bottom of the balance weight elastic parts being connected.
Further, the elastic parts include conical shell, located at the inside of the conical shell and with the balance
The connected plate-like shell fragment of weight and the first fixture for fixing the conical shell.
Further, the elastic parts includes the second spring being connected with the balance weight and for fixing
State the second fixture of end of the second spring away from the balance weight.
Further, the rope is elastic rope.
Further, the weight support is that reinforcement branch is additionally provided with the top and bottom of T-shaped support, the weight support
Bar.
Further, the weight support is provided with multiple, and multiple weight supports, which enclose, is located at the four of the mining well lid
Week.
Further, in addition to the sealed liquid cell for preventing the mining well lid from leaking out.
Further, in addition to for fixing the presser feet of the mining well lid.
The mine anti-explosion well lid that the utility model is provided, including the mining well lid as any one of above-mentioned technical scheme
Explosion protection system.
The mining well lid explosion protection system that the utility model is provided includes weight support, passes through the both sides at the top of weight support
It is respectively provided with pulley, pulley and wears rope, rope sequentially passes through two pulleys of both sides at the top of weight support, one end and mining well
Lid is connected, and the other end is connected with balance weight so that balance weight can be connected with mining well lid by rope, to keep mining
The balance of well lid, realizes normal function of the mining well lid in mine ventilation system, mining well lid and the cunning close to mining well lid
The first spring is connected between wheel, and the first spring housing is located at the outside of rope, by being set between mining well lid and pulley
First spring cause mine occur explosion accident, when mining well lid has been fried, the first spring-compressed mining well lid is produced to
Under elastic force, prevent mining well lid from flying up, if explosion wave is excessive when causing the mining well lid to continue to rise, the first spring is with ore deposit
Together risen to well lid the first spring start stretching, to mining well lid produce pulling force, with the first spring amount of tension gradually
Increase, also gradually increases the pulling force of mining well lid, so as to prevent mining well lid to be blown up, promotes mining well lid safe
Reset, reduce the possibility that mining well lid is blown up, it is ensured that the normal operation of mine ventilation system, it is to avoid because blast is produced
High-pressure gas wave shock wave destruction chief ventilators, the life security to underground work personnel threatens, while greatly dropping
Low mining well lid is blown up the probability for causing secondary injury, has ensured the safety of life and property of people.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
The mining well lid for the mining well lid explosion protection system that Fig. 1 provides for the utility model embodiment is under normally ventilation operating mode
Structural representation；
The first embodiment of the elastic parts for the mining well lid explosion protection system that Fig. 2 provides for the utility model embodiment
Structural representation；
First spring when the mining well lid for the mining well lid explosion protection system that Fig. 3 provides for the utility model embodiment has been fried
Structural representation in compressive state；
First spring when the mining well lid for the mining well lid explosion protection system that Fig. 4 provides for the utility model embodiment is blown up
Structural representation in extended state.
Icon：100- is mining well lid；200- weight supports；300- pulleys；400- ropes；500- balance weights；600-
One spring；700- elastic parts；710- conical shells；720- plate-like shell fragments；The fixtures of 730- first；800- strengthens pole.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only
Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Embodiment 1 and embodiment 2 are described in detail below in conjunction with the accompanying drawings：
The mining well lid for the mining well lid explosion protection system that Fig. 1 provides for the utility model embodiment is under normally ventilation operating mode
Structural representation；The first reality of the elastic parts for the mining well lid explosion protection system that Fig. 2 provides for the utility model embodiment
Apply the structural representation of mode；The mining well lid for the mining well lid explosion protection system that Fig. 3 provides for the utility model embodiment is fried
The first spring is in the structural representation of compressive state when rising；Fig. 4 is explosion-proof for the mining well lid that the utility model embodiment is provided
The first spring is in the structural representation of extended state when the mining well lid of system is blown up.
Embodiment 1
Please with reference to Fig. 1-Fig. 4, a kind of mining well lid explosion protection system is present embodiments provided, including weight support 200,
Pulley 300 located at the top both sides of weight support 200, it is connected with mining well lid 100 and sequentially passes through the rope of two pulleys 300
400 and with rope 400 away from mining well lid 100 the balance weight 500 that is connected of free end, specifically：
Normally operation of the mining well lid explosion protection system to mine ventilation system is significant, when mine is normally divulged information, ore deposit
It should ensure that and be held on ventilating shaft mouth with well lid 100, prevent ventilation short circuit, when chief ventilators failure or generation power failure etc.
When other reasonses cause the chief ventilators to shut down, mining well lid 100 is switched on, to make full use of gravity-flow ventilation, most
Fresh air is provided for underground to limits, it is ensured that the need for underground work personnel, the mining well lid that the present embodiment is provided is explosion-proof
System includes weight support 200, and rope is worn by being respectively provided with the both sides at the top of weight support 200 on pulley 300, pulley 300
Rope 400, rope 400 sequentially passes through two pulleys 300 of the top both sides of weight support 200, and one end is connected with mining well lid 100,
The other end is connected with balance weight 500 so that balance weight 500 can be connected with mining well lid 100 by rope 400, according to
The actual condition of mine, the balance weight 500 of approrpiate wts is selected by calculating, and ensure that mine in normal ventilation, ore deposit
With the closed cover of well lid 100 together on ventilating shaft mouthful, the normal ventilation of mine is realized, after chief ventilators shut down, by flat
Weight hammers 500 rational counterweights into shape, applies pulling force to mining well lid 100 by pulley 300, mining well lid 100 is automatically opened up, protect
The normal demand of underground work personnel is demonstrate,proved, after chief ventilators recover operating, makes ore deposit by the mining gravity of itself of well lid 100
Resetted with well lid 100 to realize normal ventilation, it is achieved thereby that normal function of the mining well lid 100 in mine ventilation system.
One of major function of mining well lid explosion protection system is mining well lid when occurring gas or coal-dust explosion in underground
100 can open carry out pressure release in time, it is to avoid the high-pressure gas wave shock wave destruction chief ventilators that blast is produced, to underground work
The life security of personnel threatens, the mining well lid explosion protection system that the present embodiment is provided mining well lid 100 with it is close mining
Be also associated with being sheathed on first spring 600 in the outside of rope 400 between the pulley 300 of well lid 100, mining well lid 100 with it is close
The first spring 600 is connected between the pulley 300 of mining well lid 100, and the first spring 600 is sheathed on the outside of rope 400, leads to
Cross the first spring 600 of setting and cause occur explosion accident in mine, when mining well lid 100 has been fried, the compression pair of the first spring 600
Mining well lid 100 produces downward elastic force, prevents mining well lid 100 from flying up, if explosion wave is excessive to cause mining well lid 100
When continuing to rise, the first spring 600 together rises to the first spring 600 with mining well lid 100 and starts stretching, to mining well lid
100 produce pulling force, and the amount of tension with the first spring 600 gradually increases, the pulling force of mining well lid 100 is also gradually increased, from
And prevent mining well lid 100 to be blown up, promote mining well lid 100 can safety reset, reduce mining well lid 100 and blown up
Possibility, it is ensured that the normal operation of mine ventilation system, realize the major function of mining well lid explosion protection system, it is to avoid because
The high-pressure gas wave shock wave destruction chief ventilators that blast is produced, the life security to underground work personnel threatens, simultaneously
Significantly reduce mining well lid 100 and blown up the probability for causing secondary injury, ensure the safety of life and property of people.
In a kind of specific embodiment, the mining well lid explosion protection system that the present embodiment is provided also includes and balance weight
The elastic parts 700 of 500 bottom connection.By setting elastic parts 700 to further increase in the bottom of balance weight 500
The security performance of mining well lid explosion protection system, occurs explosion accident, when mining well lid 100 has been fried, the first spring 600 in mine
Compression produces downward elastic force to mining well lid 100, prevents mining well lid 100 from flying up, meanwhile, the elasticity of compression of balance weight 500
Component 700 puts aside elastic potential energy, and when mining well lid 100 reaches maximum displacement, the first spring 600 and elastic parts 700 are common
Elastic potential energy is discharged, a downward elastic force is applied with to mining well lid 100, helps mining well lid 100 being capable of Rapid reset, guarantor
The normal operation of mine ventilation system is demonstrate,proved, if explosion wave is excessive when causing the mining well lid 100 to continue to rise, the first spring
600 together rise with mining well lid 100, and balance weight 500 is moved upwards, make elastic parts 700 start to recover deformation, mining well
Lid 100 continues the rising that flies up, until the first spring 600 and elastic parts 700 start stretching action, so as to mining well lid 100
Produce pulling force, the amount of tension with the first spring 600 and elastic parts 700 gradually increases, to the pulling force of mining well lid 100 also by
It is cumulative big, so as to prevent mining well lid 100 to be blown up, promote mining well lid 100 can safety reset, pass through elastic parts
700 and the collective effect of the first spring 600 to mining well lid 100 apply pulling force so that mining well lid 100 can be quick after having fried
Reset, reduce the possibility that mining well lid 100 is blown up, further increase the security performance of mining well lid explosion protection system,
The normal operation of mine ventilation system is ensure that, secondary injury is caused while significantly reducing mining well lid 100 and being blown up
Probability, has ensured the safety of life and property of people.
In the alternative of the present embodiment, as shown in Fig. 2 elastic parts 700 includes conical shell 710, located at conical shell
The inside of body 710 and the plate-like shell fragment 720 that is connected with balance weight 500 and first fixing for fixing conical shell 710
Part 730.Plate-like shell fragment 720 is connected with balance weight 500, and inside conical shell 710, because housing is set to taper,
And conical shell 710 is fixed by the first fixture 730 so that plate-like shell fragment 720 can realize disk in the displacement of vertical direction
The stretching, extension or contraction of shape shell fragment 720, so as to put aside or discharge elastic potential energy, occur explosion accident, the mining quilt of well lid 100 in mine
When having fried, the first spring 600, which compresses, produces downward elastic force to mining well lid 100, prevents mining well lid 100 from flying up, now, puts down
Weight hammer 500 is moved downward, and compression plate-like shell fragment 720 stretches downwards savings elastic potential energy, when mining well lid 100 reaches dominant bit
During shifting, the first spring 600 and plate-like shell fragment 720 discharge elastic potential energy jointly, and a downward bullet is applied with to mining well lid 100
Power, helps mining well lid 100 being capable of Rapid reset, it is ensured that the normal operation of mine ventilation system, is led if explosion wave is excessive
When causing the mining continuation of well lid 100 rising, the first spring 600 together rises with mining well lid 100, and balance weight 500 is moved upwards,
The first spring 600 and plate-like shell fragment 720 is set to start to recover deformation, mining well lid 100 continues the rising that flies up, until the first spring
600 start stretching, and plate-like shell fragment 720 starts upward contraction, pulling force produced to mining well lid 100, with the drawing of the first spring 600
The amount of stretching gradually increases, and the amount of contraction of plate-like shell fragment 720 gradually increases, and the pulling force of mining well lid 100 is also gradually increased, so as to hinder
Stopped mining well lid 100 to be blown up, promote mining well lid 100 can safety reset, pass through the spring of plate-like shell fragment 720 and first
600 collective effects to mining well lid 100 apply pulling force so that mining well lid 100 after having fried can Rapid reset, reduce ore deposit
The possibility blown up with well lid 100, further increases the security performance of mining well lid explosion protection system, it is ensured that mine ventilation
The normal operation of system.
In the alternative dispensing means of the present embodiment, elastic parts 700 includes the second bullet being connected with balance weight 500
Spring and the second fixture for fixing end of the second spring away from balance weight 500.The bottom of second spring passes through
Two fixtures are fixed so that second spring can realize the stretching, extension or contraction of second spring in the displacement of vertical direction, so that product
Store or release elastic potential energy, occur explosion accident in mine, when mining well lid 100 has been fried, the first spring 600 is compressed to mining
Well lid 100 produces downward elastic force, prevents mining well lid 100 from flying up, now, balance weight 500 is moved downward, and compresses the second bullet
Spring puts aside elastic potential energy, and when mining well lid 100 reaches maximum displacement, the first spring 600 and second spring discharge elasticity jointly
Potential energy, a downward elastic force is applied with to mining well lid 100, helps mining well lid 100 being capable of Rapid reset, it is ensured that mine leads to
The normal operation of wind system, if explosion wave is excessive when causing the mining well lid 100 to continue to rise, the first spring 600 is with mining
Well lid 100 together rises, and balance weight 500 is moved upwards, makes the first spring 600 and second spring start to recover deformation, mining
Well lid 100 continues the rising that flies up, until the first spring 600 starts stretching with second spring, pulling force is produced to mining well lid 100,
Amount of tension with the first spring 600 and second spring gradually increases, and the pulling force of mining well lid 100 is also gradually increased, so that
Prevent mining well lid 100 to be blown up, promote mining well lid 100 can safety reset, pass through second spring and the first spring 600
Collective effect to mining well lid 100 apply pulling force so that mining well lid 100 after having fried can Rapid reset, reduce mining
The possibility that well lid 100 is blown up, further increases the security performance of mining well lid explosion protection system, it is ensured that mine ventilation system
The normal operation of system.
In a kind of specific embodiment, rope 400 is elastic rope 400.Cause mining well when explosion wave is excessive
When lid 100 flies up, the first spring 600 together rises with mining well lid 100, makes the first spring 600 start to recover deformation, mining well
Lid 100 continues the rising that flies up, until the spring 600 of elastic rope 400 and first starts stretching, pulling force is produced to mining well lid 100,
Amount of tension with the spring 600 of elastic rope 400 and first gradually increases, and the pulling force of mining well lid 100 is also gradually increased, from
And prevent mining well lid 100 to be blown up, promote mining well lid 100 can safety reset, pass through the bullet of elastic rope 400 and first
The collective effect of the collective effect or elastic rope 400 of spring 600, the first spring 600 and elastic parts 700 is to mining well lid
100 apply pulling force so that mining well lid 100 after having fried can Rapid reset, reduce the possibility that mining well lid 100 is blown up
Property, while make it that mining well lid 100 is difficult to be pulled off when flying up, and further improves mining well using elastic rope 400
The security performance of lid explosion protection system, it is ensured that the normal operation of mine ventilation system.
In a kind of specific embodiment, weight support 200 is T-shaped support, and pulley 300 is located at the two of T-shaped cradle top
End, it is easy to accomplish the function of weight support 200, the top and bottom of weight support 200 are additionally provided with reinforcement pole 800, strengthen branch
Bar 800 and the triangle setting of weight support 200, improve the strength and stability of weight support 200, it is ensured that mine leads to
The normal operation of wind system.To make mining well lid 100 fast and safely to be resetted after flying up, weight support 200 is provided with multiple,
Multiple weight supports 200 enclose the surrounding for being located at mining well lid 100, it is preferable that weight support 200 is provided with four, four weight branch
Frame 200 is 90 ° relative to the angle of the mining center of well lid 100, utilizes itself weight of the pulling force of rope 400 and mining well lid 100
Power etc. realizes the safety reset of mining well lid 100 jointly.It is mining to make mining well lid 100 ensure air-tightness in normal ventilation
Well lid 100 is also associated with sealed liquid cell, and to prevent mining well lid 100 from being leaked out in normal ventilation, mining well lid 100 also passes through
Presser feet is fixed, it is to avoid in back lass, and mining well lid 100 is opened by wind, it is ensured that the normal operation of mine ventilation system.
Embodiment 2
Present embodiments provide a kind of mine anti-explosion well lid, including the mining well lid explosion protection system in embodiment 1, by
The first spring 600 is set to cause occur explosion accident in mine between mining well lid 100 and pulley 300, mining well lid 100 is fried
When rising, the first spring 600, which compresses, produces downward elastic force to mining well lid 100, prevents mining well lid 100 from flying up, if blast punching
When hitting that ripple is excessive to cause the mining well lid 100 to continue to rise, the first spring 600 together rises to the first spring with mining well lid 100
600 start stretching, produce pulling force to mining well lid 100, the amount of tension with the first spring 600 gradually increases, to mining well lid
100 pulling force also gradually increases, so as to prevent mining well lid 100 to be blown up, promote mining well lid 100 can safety reset,
Reduce the possibility that mining well lid 100 is blown up, it is ensured that the normal operation of mine ventilation system, it is to avoid produce because of blast
High-pressure gas wave shock wave destroys chief ventilators, and the life security to underground work personnel threatens, greatly reduced simultaneously
Mining well lid 100 is blown up the probability for causing secondary injury, has ensured the safety of life and property of people.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of mining well lid explosion protection system, it is characterised in that including weight support (200), located at the weight support (200)
The pulley (300) of top both sides, the rope for being connected with mining well lid (100) and sequentially passing through two pulleys (300)
(400) balance weight (500) and with the rope (400) being connected away from the free end of the mining well lid (100)；
It is connected between the pulley (300) of the mining well lid (100) and the close mining well lid (100) and is sheathed on institute
State the first spring (600) on the outside of rope (400).
2. mining well lid explosion protection system according to claim 1, it is characterised in that also including with the balance weight
(500) elastic parts (700) of bottom connection.
3. mining well lid explosion protection system according to claim 2, it is characterised in that the elastic parts (700) includes cone
Shape housing (710), the plate-like shell fragment being connected located at the inside of the conical shell (710) and with the balance weight (500)
(720) and for fixing the first fixture (730) of the conical shell (710).
4. mining well lid explosion protection system according to claim 2, it is characterised in that the elastic parts (700) include with
The connected second spring of the balance weight (500) and for fixing the second spring away from the balance weight (500)
End the second fixture.
5. the mining well lid explosion protection system according to any one of claim 1-4, it is characterised in that the rope (400)
For elastic rope (400).
6. mining well lid explosion protection system according to claim 5, it is characterised in that the weight support (200) is T-shaped branch
Reinforcement pole (800) is additionally provided with the top and bottom of frame, the weight support (200).
7. mining well lid explosion protection system according to claim 6, it is characterised in that the weight support (200) is provided with more
Individual, multiple weight supports (200) enclose the surrounding for being located at the mining well lid (100).
8. mining well lid explosion protection system according to claim 7, it is characterised in that also including for preventing the mining well
The sealed liquid cell that lid (100) leaks out.
9. mining well lid explosion protection system according to claim 8, it is characterised in that also including for fixing the mining well
Cover the presser feet of (100).
10. a kind of mine anti-explosion well lid, it is characterised in that prevent including mining well lid as claimed in any one of claims 1-9 wherein
Quick-fried system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720313574.3U CN206591977U (en) | 2017-03-28 | 2017-03-28 | Mining well lid explosion protection system and mine anti-explosion well lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720313574.3U CN206591977U (en) | 2017-03-28 | 2017-03-28 | Mining well lid explosion protection system and mine anti-explosion well lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206591977U true CN206591977U (en) | 2017-10-27 |
Family
ID=60121523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720313574.3U Expired - Fee Related CN206591977U (en) | 2017-03-28 | 2017-03-28 | Mining well lid explosion protection system and mine anti-explosion well lid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206591977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096444A (en) * | 2020-09-22 | 2020-12-18 | 扬州大学 | Self-recovery type inclined shaft pressure relief explosion-proof device and method for coal mine safety production |
-
2017
- 2017-03-28 CN CN201720313574.3U patent/CN206591977U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096444A (en) * | 2020-09-22 | 2020-12-18 | 扬州大学 | Self-recovery type inclined shaft pressure relief explosion-proof device and method for coal mine safety production |
| CN112096444B (en) * | 2020-09-22 | 2022-06-21 | 扬州大学 | Self-recovery type inclined shaft pressure relief explosion-proof device and method for coal mine safety production |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 Termination date: 20190328 |