CN107559044A - Air door pneumatic locking warning device - Google Patents
Air door pneumatic locking warning device Download PDFInfo
- Publication number
- CN107559044A CN107559044A CN201710717573.XA CN201710717573A CN107559044A CN 107559044 A CN107559044 A CN 107559044A CN 201710717573 A CN201710717573 A CN 201710717573A CN 107559044 A CN107559044 A CN 107559044A
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- Prior art keywords
- air door
- bell
- air
- ringing
- valve element
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Abstract
The present invention relates to Pneumatic Control Technology field, in particular, is related to a kind of air door pneumatic locking warning device.A kind of air door pneumatic locking warning device, including：Closed block and part of ringing a bell, the closed block include contact arm, control valve element, and described part of ringing a bell includes vibration valve element, vibrating arm and ring；The described part of ringing a bell of described closed block connection, described control valve element one end connection contact arm, one end connection vibrating arm of described vibration valve core, the other end connection ring of the vibrating arm；The closed block and part of ringing a bell are fixed at the doorframe of air door.Its advantage is：Described air door pneumatic locking warning device possesses air door locking and pneumatic warning function of ringing a bell, opened completely without manpower, package unit can reach underground coal mine requirement of explosion proof, be particularly suitable in highly gassy mine place and the use of inflammable and explosive place without electric power.
Description
Technical field
The present invention relates to Pneumatic Control Technology field, in particular, is related to a kind of air door pneumatic locking warning device.
Background technology
It is distinguished and admirable that air door is that underground coal mine can separate, and and can is passed through the Important building of traffic, and it is mainly realized to well
Under distinguished and admirable control.And two sects are at least arranged in coal mine underground air door requirement, in the case where one of air door is closed, could realize
The unlatching at another sect, i.e. two sects can not open simultaneously, otherwise cause to leak out or Air escape branch, influence mine ventilation system.
Therefore can typically carry out locking to air door, in the prior art, coal mine ventilation door locking be mostly installed at doorframe it is close,
The electronic sensors such as travel switch, electronic signal is passed to realize to another road door state control by control device by the opening and closing of door
System and the control to explosion-proof electric bell.But electrical equipment easily produces spark, gas explosion occurs, electrical equipment use must have
Strict explosion prevention function can just go into the well, and quick-fried risk be present, there is potential safety hazard, so forbidding in highly gassy mine return airway
Road uses, cause these place air doors can only people push and open, labor intensity is big, and security is low.
The content of the invention
The purpose of the present invention is to provide a kind of air door pneumatic locking warning device in view of the shortcomings of the prior art, using pneumatic
Control, it is not necessary to using electrical equipment, the high methane place under inflammable and explosive, mine can be especially applied, and in door opening
When can send alarm, prompt door opening.
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of air door pneumatic locking warning device, including twice air door, closed block is installed at the doorframe of the air door,
Characterized in that, also include：The power gas source of gases at high pressure is provided and part of ringing a bell, the part of ringing a bell connect the lock portion
Part；
The closed block includes locking housing, contact arm, control valve element and the first spring in the locking housing,
The locking housing is provided with the first air inlet and first row gas port, and first air inlet connects power gas source, and described first
Exhaust outlet connects part of ringing a bell, and described control valve element one end connects first spring, and the other end connects the contact arm, the control
The first air flue and the second air flue are provided with valve element processed；
When wherein one of air door is closed, the contact arm make it that first spring is compressive state by pressure control valve core,
First air inlet is led in described first air flue one end, and the other end leads to the control valve of another air door, when wherein one of air door
During opening, first spring recovers to promote the control valve element to move to cause the second air flue both ends to correspond to described the respectively
One air inlet and the first row gas port, part of ringing a bell described in first row gas port connection, enter when gases at high pressure described in beat
During bell part, the part of ringing a bell is rung a bell alarm.
When wherein one of air door is closed, described control valve element causes the control that gases at high pressure enter another road air door
Valve, now another road air door can realize closure or openness；When wherein one of air door is opened, control valve element switching, gases at high pressure
Switch into the part of ringing a bell to ring a bell alarm, the first air flue being connected with another road air door is blocked, and another road air door can not be beaten
Open, realize the mutual locking of twice air door.
On the basis of above-mentioned technical proposal, the present invention can also improve as follows：
Further, the part of ringing a bell includes vibration housing, ring, vibrating arm and shaking in the vibration housing
Movable valve plug；The vibration valve element both sides are respectively equipped with the first valve pocket and the second valve pocket, and the vibrating valve in-core is provided with described in UNICOM
Second valve element groove of the second valve pocket described in the first valve element groove of the first valve pocket and UNICOM, the second bullet is provided with second valve pocket
Spring, the ring are located at one end of the vibrating arm, and the other end of the vibrating arm connects the vibration valve element, the vibration shell
Body is provided with second exhaust port and the second air inlet being connected with the first row gas port；
When the second air inlet of part of being rung a bell described in gases at high pressure entrance, the first valve element groove and second valve element
Groove the second air inlet described in UNICOM successively, vibrate disc vibration and drive vibrating arm motion to hit ring repeatedly.
Further, the barometric damper of regulation throughput is provided with second air flue.The barometric damper passes through
Adjust the throughput entered and adjust the loudness of ring sound and frequency, realize the control to volume up-down.
Further, the part of ringing a bell also includes being arranged on the muffler part at the second exhaust port.
Wherein, the second exhaust port shares two, and the muffler part includes silencer and hush tube, the hush tube
Both ends connect two second exhaust port respectively, and the silencer is connected with the body of the hush tube.
Wherein, the hush tube forms by sponge, the high-pressure air pipe positioned at innermost layer and positioned at outermost steel pipe, described
Sponge is filled between the high-pressure air pipe and the steel pipe, is acted on playing noise elimination, on the high-pressure air pipe and the steel pipe
Offer multiple exhaust holes.This sandwich construction can realize good decrease of noise functions.
Further, the shell of the ring uses cast iron materials and coordinated with the vibrating arm for gap, the ring
Shell be provided with endoporus, the vibration valve core diameter is with the diameter of bore deviation range in 0.02-0.08mm.
Further, the vibrating arm is provided with impacting body close to one end of the ring, and spark, institute are produced to prevent from tapping
State impacting body and use nylon material.
Further, in addition to the synchronous valve on the closed block.While for ensuring door opening, institute
Part of ringing a bell can be entered by stating gases at high pressure, tap ring.
Further, the power gas source is the air line under mine, the air line and first air inlet
Between be provided with steam-water separator.So as to effectively avoid water smoke from entering, protection single unit system is without prejudice, service life length.
Beneficial effects of the present invention are compared with prior art：
The present invention is used as power source, when cylinder promotes air door to open or close, air door by the use of the air line under mine
By pressing, folding of the contact arm to control valve element, so as to switch the path of gases at high pressure, realize to the cylinder of another road air door
Control.Ensure that twice air door will not be opened simultaneously, it is only necessary to which mutually closing for twice air door just can effectively be realized by pneumatic control
Lock, while when one air door is opened, can pneumatic control at once ring a bell alarm, stopping of ringing a bell during air door closing, without any
Electric power, also open, can voluntarily alarm completely without manpower, it is easy to use, efficiently, production cost is greatly reduced, saved
Manpower and materials.The present invention can reach underground coal mine requirement of explosion proof, be particularly suitable in height without any electric power, whole device simultaneously
Gaseous mine place and inflammable and explosive place use.
Brief description of the drawings
The structural representation when air door of air door pneumatic locking warning device described in Fig. 1 embodiment of the present invention is opened；
The structural representation when air door of air door pneumatic locking warning device described in Fig. 2 embodiment of the present invention is closed；
The schematic diagram of muffler part described in Fig. 3 embodiment of the present invention；
The structural representation of the section of hush tube described in Fig. 4 embodiment of the present invention；
The internal structure of part of ringing a bell described in Fig. 5 embodiment of the present invention；
The internal structure of closed block described in Fig. 6 embodiment of the present invention；
Wherein, A- closed blocks, B- ring a bell part, C- muffler parts,
The air inlets of 1- first, 2- control valve elements, 3- contact arms, the springs of 4- first, the air flues of 5- first, the air flues of 6- second, 7- gas
Flow regulating valve, 8- second springs, 9- vibrating arms, 10- rings, 11- vibration valve elements, the valve pockets of 12- first, the valve pockets of 13- second, 14-
Second valve element groove, 15- the first valve element grooves, 16- hush tubes, 17- silencers, 18- locking housings, 19- first row gas ports, 20-
Two air inlets, 21- second exhaust port, 22- vibration housings, 23- torsion springs, 24- rotating shafts, 25- rollers, 26- cast iron sleeves, 27- exhausts
Aperture, 28- steel pipes, 29- sponges, 30- high-pressure air pipes, 31- impacting bodies.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.According to claims and following
Explanation, advantages and features of the invention will become apparent from.It should be noted that accompanying drawing uses using very simplified form and
Non- accurately ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Embodiment
A kind of air door pneumatic locking warning device, as Figure 1-3, including twice air door, pacify at the doorframe of the air door
Equipped with closed block A, in addition to：The power gas source of gases at high pressure and part B of ringing a bell are provided, it is described to ring a bell described in part B connection
Closed block A；
The closed block A includes locking housing 18, contact arm 3, the control valve element 2 in the locking housing 18 and the
One spring 4, the locking housing 18 are provided with the first air inlet 1 and first row gas port 19, and first air inlet 1 connects power
Source of the gas, the first row gas port 19 connect part B of ringing a bell, and described control valve element 2 one end connects first spring 4, the other end
The contact arm 3 is connected, the first air flue 5 and the second air flue 6 are provided with the control valve element 2；
When wherein one of air door is closed, the contact arm 3 causes first spring 4 for compression shape by pressure control valve core 2
First air inlet 1 is led in state, described one end of first air flue 5, and the other end leads to the control valve of another air door, when wherein together
When air door is opened, first spring 4 recovers to promote control valve element 2 movement make it that the both ends of the second air flue 6 are right respectively
First air inlet 1 and the first row gas port 19 are answered, the first row gas port 19 connects the part B of ringing a bell, works as high pressure
Gas enter described in ring a bell part B when, the part B of ringing a bell is rung a bell alarm.
When wherein one of air door is closed, described control valve element 2 causes gases at high pressure to enter the control of another road air door
Valve processed, now another road air door can realize closure or openness；When wherein one of air door is opened, control valve element 2 switches, high pressure gas
Body switches into the part B of ringing a bell and rung a bell alarm, and the first air flue 5 being connected with another road air door is blocked, another road air door without
Method is opened, and realizes the mutual locking of twice air door.
In a preferred scheme, the part B of ringing a bell includes vibration housing 22, ring 10, vibrating arm 9 and is shaken positioned at described
Vibration valve element 11 in dynamic housing 22；Vibration valve element 11 both sides are respectively equipped with the first valve pocket 12 and the second valve pocket 13, described
Vibrate the second valve provided with the second valve pocket 13 described in the first valve element groove 15 of the first valve pocket 12 described in UNICOM and UNICOM in valve element 11
Core groove 14, second spring 8 is provided with second valve pocket 13, the ring 10 is located at one end of the vibrating arm 9, the vibration
Bar 9 the other end connection it is described vibration valve element 11, it is described vibration housing 22 be provided with second exhaust port 21 and with the first exhaust
Second air inlets 20 of the connection of mouth 19；
When the second air inlet 20 of part B of ringing a bell described in gases at high pressure enter, the first valve element groove 15 and described the
The second air inlet 20 described in UNICOM, vibration valve element 11 vibrate and drive vibrating arm 9 to move shock repeatedly and shake two valve element grooves 14 successively
Bell 10.
In a preferred scheme, the barometric damper 7 of regulation throughput is provided with second air flue 6.The air-flow is adjusted
Section valve 7 adjusts the loudness and frequency of the sound of ring 10 by adjusting the throughput entered, realizes the control to volume up-down.
In a preferred scheme, the part B of ringing a bell also includes being arranged on the muffler part at the second exhaust port 21
C。
Wherein, the second exhaust port 21 shares two, and the muffler part C includes silencer 17 and hush tube 16, institute
State the both ends of hush tube 16 and connect two second exhaust port 21, the body phase of the silencer 17 and the hush tube 16 respectively
Even.
Wherein, as shown in figure 4, the hush tube 16 is by sponge 29, the high-pressure air pipe 30 positioned at innermost layer and positioned at outermost
The steel pipe 28 of layer is formed, and the sponge 29 is filled between the high-pressure air pipe 30 and the steel pipe 28, to play noise elimination effect,
Multiple exhaust holes 27 are offered on the high-pressure air pipe 30 and the steel pipe 28.This sandwich construction can realize good noise reduction
Function.
In a preferred scheme, the shell of the ring 10 uses cast iron materials and coordinated with the vibrating arm 9 for gap,
The shell of the ring 10 is provided with endoporus, and the vibration diameter of valve element 11 is with the diameter of bore deviation range in 0.02-
0.08mm。
In a preferred scheme, the vibrating arm 9 is provided with impacting body 31 close to one end of the ring 10, to prevent from tapping
Spark is produced, the impacting body 31 uses nylon material.
In a preferred scheme, in addition to the synchronous valve on the closed block A.For ensuring door opening
Meanwhile the gases at high pressure can enter part B of ringing a bell, and tap ring 10.
In a preferred scheme, the power gas source be mine under air line, the air line and described first
Steam-water separator is provided between air inlet 1.So as to effectively avoid water smoke from entering, protection single unit system is without prejudice, service life
It is long.
The present invention the course of work be：
When door opening, as shown in figure 1, the contact arm 3 ejects, then the control valve element 2 is under the effect of the first spring 4
Move position so that first air flue 5 for leading to another road airdoor control valve is blocked, and another road air door can not be opened, real
The mutual locking of existing twice air door.
Pressure-air enters second air flue 6 by first air inlet this moment, and second air flue 6 passes through first
The air inlet 20 of exhaust outlet 19 and second and the UNICOM of the first valve element groove 15, gases at high pressure pass through described in the first valve element groove 15 entrance
First valve pocket 12, vibration valve element 11 is promoted, compresses second spring 8 so that vibrating arm 9 hits ring 10；Shaken when vibrating arm 9 hits
After bell 10, first air inlet 1 and the UNICOM of the first valve element groove 15, second air flue 6 pass through the He of first row gas port 19
Second air inlet 20 and the UNICOM of the second valve element groove 14, gases at high pressure enter second valve pocket by the second valve element groove 14
13, vibration valve element 11 is promoted, and under the interaction of second spring 8 so that the resilience of vibrating arm 9；First row gas port 19 afterwards
UNICOM, the gases at high pressure of second air flue 6 enter institute again by the first valve element groove 15 again with the first valve element groove 15
The first valve pocket 12 is stated, and so on, so as to promote 9 continuous cyclic movement of vibrating arm, completes the percussion to ring 10, is realized
The prompting that air door is opened, i.e., prompting worker is now air door open mode.
When air door is closed, as shown in Fig. 2 described contact arm 3 is pressed, then the control valve element 2 is made in the first spring 4
Under so that the first air flue 5 described in the UNICOM of the first air inlet 19, second air flue 6 are blocked, and gases at high pressure lead to this moment
Cross first air inlet 1 and enter first air flue 5, another road air door lock portion is entered by first air flue 5
Part A control valve, now other one of air door can realize the control being turned on and off.
Fig. 5 gives the specific embodiment for part B internal structure of ringing a bell, in addition to is arranged on vibrating arm 9 and passes vibration shell
The position of body 22 is provided with cast iron sleeve 26, and vibrating arm 9 coordinates with cast iron sleeve 26 for gap, vibrating arm 9 and the diameter deviation of cast iron sleeve 26
Scope is 0.04-0.1mm.
Fig. 6 gives the specific embodiment of closed block A internal structures.Including torsion spring 23, rotating shaft 24 and roller 25,
But it is simply not limited only to Fig. 4 and Fig. 5 than preferably embodiment, protection of the invention, and can protect arbitrarily can be with complete
Into the structure of Fig. 1 functions.
Obviously, those skilled in the art can carry out the spirit of various changes and modification without departing from the present invention to invention
And scope.So, if these modifications and variations of the present invention belong to the claims in the present invention and its equivalent technologies scope it
Interior, then the present invention is also intended to including these changes and modification.
Claims (10)
1. a kind of air door pneumatic locking warning device, including twice air door, closed block is installed at the doorframe of the air door, its
It is characterised by, in addition to：The power gas source of gases at high pressure is provided and part of ringing a bell, the part of ringing a bell connect the lock portion
Part；
The closed block includes locking housing, contact arm, control valve element and the first spring in the locking housing, described
Locking housing is provided with the first air inlet and first row gas port, and first air inlet connects power gas source, the first exhaust
Mouth connects part of ringing a bell, and described control valve element one end connects first spring, and the other end connects the contact arm, the control valve
In-core is provided with the first air flue and the second air flue；
When wherein one of air door is closed, the contact arm make it that first spring is compressive state by pressure control valve core, described
First air inlet is led in first air flue one end, and the other end leads to the control valve of another air door, when wherein one of air door is opened
When, first spring recovers to promote the control valve element to move so that the second air flue both ends correspond to described first and entered respectively
Gas port and the first row gas port, part of ringing a bell described in first row gas port connection, enter when gases at high pressure described in ring a bell portion
During part, the part of ringing a bell is rung a bell alarm.
2. air door pneumatic locking warning device according to claim 1, it is characterised in that：The part of ringing a bell includes vibration
Housing, ring, vibrating arm and the vibration valve element in the vibration housing；The vibration valve element both sides are respectively equipped with the first valve
Chamber and the second valve pocket, the second valve pocket described in the first valve element groove and UNICOM of the vibrating valve in-core provided with the first valve pocket described in UNICOM
The second valve element groove, be provided with second spring in second valve pocket, the ring is located at one end of the vibrating arm, the vibration
The other end of bar connects the vibration valve element, and the vibration housing is provided with second exhaust port and is connected with the first row gas port
Second air inlet；
When the second air inlet of part of ringing a bell described in gases at high pressure enter, the first valve element groove and the second valve element groove according to
Second air inlet described in secondary UNICOM, vibrate disc vibration and drive vibrating arm motion to hit ring repeatedly.
3. air door pneumatic locking warning device according to claim 1, it is characterised in that：It is provided with and adjusts in second air flue
The barometric damper of solar term flow.
4. air door pneumatic locking warning device according to claim 2, it is characterised in that：The part of ringing a bell also includes peace
Muffler part at the second exhaust port.
5. air door pneumatic locking warning device according to claim 4, it is characterised in that：The second exhaust port shares two
Individual, the muffler part includes silencer and hush tube, and the hush tube both ends connect two second exhaust port, institute respectively
The body that silencer is stated with the hush tube is connected.
6. air door pneumatic locking warning device according to claim 5, it is characterised in that：The hush tube is by sponge, position
Formed in the high-pressure air pipe of innermost layer and positioned at outermost steel pipe, the sponge is filled in the high-pressure air pipe and the steel pipe
Between, offer multiple exhaust holes on the high-pressure air pipe and the steel pipe.
7. air door pneumatic locking warning device according to claim 2, it is characterised in that：The shell of the ring is using casting
Iron material and be that gap coordinates with the vibrating arm, the shell of the ring are provided with endoporus, it is described vibrate valve core diameter with it is described
Diameter of bore deviation range is in 0.02-0.08mm.
8. air door pneumatic locking warning device according to claim 7, it is characterised in that：The vibrating arm shakes close to described
One end of bell is provided with impacting body, and the impacting body uses nylon material.
9. air door pneumatic locking warning device according to claim 1 or 2, it is characterised in that：Also include installed in described
Synchronous valve on closed block.
10. the air door pneumatic locking warning device according to claim 1-8 Arbitrary Terms, it is characterised in that：The power gas
Source is the air line under mine, and steam-water separator is provided between the air line and first air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717573.XA CN107559044A (en) | 2017-08-18 | 2017-08-18 | Air door pneumatic locking warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717573.XA CN107559044A (en) | 2017-08-18 | 2017-08-18 | Air door pneumatic locking warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107559044A true CN107559044A (en) | 2018-01-09 |
Family
ID=60976513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710717573.XA Pending CN107559044A (en) | 2017-08-18 | 2017-08-18 | Air door pneumatic locking warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107559044A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341155A (en) * | 2019-08-02 | 2019-10-18 | 邹苏娥 | A kind of vapour-pressure type ejection die that can be alarmed |
| CN111361200A (en) * | 2019-08-02 | 2020-07-03 | 邹苏娥 | Air pressure type ejection die equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250663Y (en) * | 2008-06-30 | 2009-06-03 | 王晓峰 | Underground automatic door of a mine |
| CN101871358A (en) * | 2009-04-22 | 2010-10-27 | 苗占有 | Novel mine air door pneumatic locking device |
| CN201747396U (en) * | 2010-04-29 | 2011-02-16 | 山东金科星机电有限公司 | Coal mine underground pneumatic air-door locking control device |
| CN103953381A (en) * | 2014-05-26 | 2014-07-30 | 蓝小玲 | Full-automatic intelligent security interlocking air door system |
| CN104251141A (en) * | 2014-09-12 | 2014-12-31 | 淮北立兴工矿设备有限公司 | Downhole air door opening device and pneumatic control interlocking system thereof |
| CN104295310A (en) * | 2014-10-09 | 2015-01-21 | 杜和军 | Automatic control device for all-pneumatic mine air door |
| CN205089352U (en) * | 2015-09-30 | 2016-03-16 | 开滦（集团）有限责任公司唐山矿业分公司 | Colliery is air door locking system in pit |
| CN105608811A (en) * | 2015-12-28 | 2016-05-25 | 中国煤炭科工集团太原研究院有限公司 | Pneumatic pulse ring |
| CN207245757U (en) * | 2017-08-18 | 2018-04-17 | 张涛 | Air door pneumatic locking warning device |
-
2017
- 2017-08-18 CN CN201710717573.XA patent/CN107559044A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250663Y (en) * | 2008-06-30 | 2009-06-03 | 王晓峰 | Underground automatic door of a mine |
| CN101871358A (en) * | 2009-04-22 | 2010-10-27 | 苗占有 | Novel mine air door pneumatic locking device |
| CN201747396U (en) * | 2010-04-29 | 2011-02-16 | 山东金科星机电有限公司 | Coal mine underground pneumatic air-door locking control device |
| CN103953381A (en) * | 2014-05-26 | 2014-07-30 | 蓝小玲 | Full-automatic intelligent security interlocking air door system |
| CN104251141A (en) * | 2014-09-12 | 2014-12-31 | 淮北立兴工矿设备有限公司 | Downhole air door opening device and pneumatic control interlocking system thereof |
| CN104295310A (en) * | 2014-10-09 | 2015-01-21 | 杜和军 | Automatic control device for all-pneumatic mine air door |
| CN205089352U (en) * | 2015-09-30 | 2016-03-16 | 开滦（集团）有限责任公司唐山矿业分公司 | Colliery is air door locking system in pit |
| CN105608811A (en) * | 2015-12-28 | 2016-05-25 | 中国煤炭科工集团太原研究院有限公司 | Pneumatic pulse ring |
| CN207245757U (en) * | 2017-08-18 | 2018-04-17 | 张涛 | Air door pneumatic locking warning device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341155A (en) * | 2019-08-02 | 2019-10-18 | 邹苏娥 | A kind of vapour-pressure type ejection die that can be alarmed |
| CN111361200A (en) * | 2019-08-02 | 2020-07-03 | 邹苏娥 | Air pressure type ejection die equipment |
| CN110341155B (en) * | 2019-08-02 | 2021-06-22 | 邹苏娥 | Air pressure type ejection die capable of alarming |
| CN111361200B (en) * | 2019-08-02 | 2021-07-16 | 吴秋华 | Air pressure type ejection die equipment |
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