CN201924742U - Electromagnetic releaser for fireproof door - Google Patents
Electromagnetic releaser for fireproof door Download PDFInfo
- Publication number
- CN201924742U CN201924742U CN 201020697717 CN201020697717U CN201924742U CN 201924742 U CN201924742 U CN 201924742U CN 201020697717 CN201020697717 CN 201020697717 CN 201020697717 U CN201020697717 U CN 201020697717U CN 201924742 U CN201924742 U CN 201924742U
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- ratchet
- door
- fixed
- spring
- manual releasing
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Abstract
The utility model discloses a normally open transmission structure of an electromagnetic releaser for a fireproof door, which comprises a body, a ratchet and pawl mechanism with an axle, a microswitch, a manual release oscillating bar, a transmission lever, a spring force device, an electromagnet, a door closing rocker arm, a base, a door fixing base and other parts. The transmission part of the electromagnetic releaser is simplified, the opening of the fireproof door is completed without the complicated transmission structure such as a clutch mechanism, the problem of fireproof door positioned only through manual reset of the traditional releaser is solved, and the automatic reset of the releaser can be realized in use through optimization of the mechanical structure; moreover, the structure is simple, the operation is convenient, the production and maintenance costs can be effectively reduced, and the usability of the fireproof door releaser is effectively improved.
Description
Technical field
The utility model relates to a kind of labeled door electromagnetism release, particularly a kind of labeled door electromagnetism release drive mechanism of often opening.
Background technology
Be provided with the labeled door that contains the electromagnetism release in the highrise building at present; when running into fire; making the electromagnetism release obtain discharging by the Fire Services Communication Centre output signal closes labeled door automatically, prevents spreading of flame and flue gas, and then effectively protect the person and property safety.But release of the prior art, transmission mechanism wherein adopts complicated drive mechanisms such as clutch mostly, its complex structure, and cost of production is also higher, and maintenance cost is also higher.
Such as, Chinese patent CN2471353Y discloses the utility model patent that name is called " labeled door closes a release automatically ", main by body, chain-drive mechanism, close a pivoted arm and be arranged on the relieving mechanism that closes between a pivoted arm and the chain-drive mechanism, this relieving mechanism comprises and one is cemented in clutch outer member on the body, is arranged on the clutch core in the circle in the clutch outer member, the sprocket wheel Joint of clutch core and chain-drive mechanism, and be sleeved on the sprocket shaft, this release also comprises the compression spring, excites rod, stop rod and temperature control tube to close an inspiration mechanism simultaneously.As seen, close the similar clutch that is of transmission mechanism of a release transmission mechanism and most release of the prior art described in this patent, this clutch complex structure, cost of production is also higher.Simultaneously, the electromagnetism release drive mechanism of prior art, complicated drive mechanisms such as process clutch are finished the automatic open and close of labeled door, and each the use all wants hand-reset to locate labeled door.Not only strengthen production and maintenance cost, caused machine components to damage easily during unloaded the use, produced mechanical breakdown, caused the hidden danger on the labeled door safety.
The purpose of this utility model overcomes above-mentioned deficiency and the electromagnetism release is redesigned, running part to the electromagnetism release is simplified, do not need to finish the unlatching of labeled door or close by complicated drive mechanisms such as clutches, adopt the labeled door electromagnetism release of this structure not only in use can automatically reset, needn't hand-reset could open the location to labeled door, and simple in structure, can reduce the cost of production and the maintenance cost of release greatly.Simultaneously, also be provided with the manual releasing fork in the utility model,, also can close labeled door manually when under the situation that causes cutting off the power supply owing to fire or under the situation of other needs, and then effectively isolate flame and flue gas, fully ensure related personnel and property safety.
The utility model content
The purpose of this utility model is the technological deficiency that exists at release in the above-mentioned prior art, provides a kind of simple in structure, easy to operate, has also had a safe and reliable electromagnetism release of manual releasing function simultaneously.
To achieve these goals, the utility model adopts following technical scheme:
The utility model provides a kind of labeled door electromagnetism release of often opening, comprise that the body, the end that are horizontally placed on doorframe inwall upside are fixedly arranged on intrinsic spring force device, are fixed on intrinsic electromagnet, vertically are assemblied in the ratchet mechanism in the body end and are located at this external door fixed bearing and rocking arm of closing the door, wherein, ratchet mechanism is the mechanism that is installed with ratchet and pull-button on the turning cylinder; The spring force device is connected with ratchet mechanism elasticity; The rocking arm of closing the door is positioned at that this is external, and an end fixes by the turning cylinder of ratchet mechanism, and the other end is articulated on the fixed bearing, and close the door rocking arm and turning cylinder can rotate synchronously; Described labeled door electromagnetism release also comprises manual releasing fork and transmission levers.
The described labeled door electromagnetism release of often opening, its manual releasing fork lower end is with the socket of electromagnet pull bar or be connected, and the middle part is provided with boss, and the top movable end stretches out that this is external; Described transmission levers one end be fixed on ratchet top and partially after the body sidewall on, be positioned at ratchet above be provided with can with the ratchet of double wedge on ratchet engagement, and can guarantee when transmission levers stressed when upwards lifting or swinging, ratchet on the lever can effectively break away from the double wedge on the ratchet, the transmission levers movable end is overlapped on the boss of manual releasing fork, and transmission levers can around fixed axis with the plane of parallel sidewalls in do the swing of certain angle.
In a kind of preferred embodiment, its manual releasing fork middle part is fixed on the body sidewall, and this fork can center on fixed axis be made certain angle in being parallel to the plane of sidewall rotation, and the boss on the fork is located on the manual releasing fork axle sleeve sidewall.
In a kind of preferred embodiment, the boss of described manual releasing fork is provided with and transmission levers shape and width corresponding grooves, this groove upper end open is big than bottom portion of groove, and the bottom portion of groove width is more than or equal to the width of transmission levers movable end, and this boss structure can carry out spacing to transmission levers to greatest extent.
In a kind of preferred embodiment, be provided with reset tension spring between the movable end of described transmission levers and the ratchet, the upper end of reset tension spring is connected with transmission levers, and the lower end is fixed on body sidewall or body bottom.
The invention also discloses a kind of labeled door electromagnetism release of often opening, comprise that the body, the end that are horizontally placed on doorframe inwall upside are fixedly arranged on intrinsic spring force device, are fixed on electromagnet on body bottom or the sidewall, vertically are assemblied in the ratchet mechanism of body end and are located at this external door fixed bearing and rocking arm of closing the door, wherein, ratchet mechanism is the mechanism that is installed with ratchet and pull-button on the turning cylinder; The spring force device is connected with pull-button elasticity on the ratchet mechanism; The rocking arm of closing the door is positioned at originally external, and an end is fixed by the turning cylinder of ratchet mechanism, the other end is articulated on the fixed bearing, and close the door rocking arm and turning cylinder can rotate synchronously, it is characterized in that: also comprise manual releasing fork, drive link and the backstay that opens the door, wherein, the manual releasing fork is fixed in the body, the pull bar of its lower end and electromagnet socket-connects, and it is external that the upper end stretches out in, and middle part and drive link fix; Backstay one end that opens the door is fixed on the body sidewall, and the other end is overlapped on the drive link.
In a kind of preferred embodiment, form hook formation upwards after described drive link movable end is bent downwardly endways, the other end is fixed on the manual releasing fork; The described backstay that opens the door is arcuation obliquely, and movable end is overlapped on the upper surface of the hook formation of drive link, the other end is rotatable to be fixed on the sidewall of ratchet top body, and be positioned at ratchet above part be provided with can with the ratchet of double wedge engagement on the ratchet.
In a kind of preferred embodiment, described drive link is socketed in the medium position of manual releasing fork, and two bar coincidences place are that socket place is fixed on the sidewall, and manual releasing fork and drive link can be done the rotation or the swing of certain angle scope synchronously around fixed axis.
In a kind of preferred embodiment, the described labeled door electromagnetism release of often opening also comprises microswitch, microswitch be installed in transmission levers or drive link under.When labeled door is often opened and when closing, microswitch can contact with transmission levers or drive link and break away from respectively, and perhaps when labeled door was often opened and closed, microswitch was in disengaging and contact condition with transmission levers or drive link respectively.
In a kind of preferred embodiment, described spring force device is made up of spring housing, spring and chain, wherein, chain external part at spring housing is provided with back-up ring, spring is fixedly mounted in the spring housing to avoid spring when the compression and skid off spring housing, and chain shaft is to running through spring, and be positioned on the chain of spring housing bottom one end and be installed with block, the diameter of this block is greater than the end face diameter of spring, and block is pressed against on the end face of movable end of spring, and the other end of chain stretches out spring housing and is connected with pull-button elasticity on the ratchet mechanism.
In a kind of preferred embodiment, ratchet, manual releasing fork, transmission levers or drive link on the described ratchet mechanism of often driving labeled door electromagnetism release all are positioned at a side relative with the body sidewall of fixing spring power apparatus with the backstay that opens the door, and this can make corresponding mechanism rotation or swing in a plane with parallel sidewalls to greatest extent.
A described operating principle of often driving labeled door electromagnetism release is as follows:
When opening the door, ratchet turns clockwise, pull-button on the ratchet mechanism just spurs chain forward thereupon rotation, and then make the stressed and extruding compression spring of block, then spring so elasticity of saving potential energy, at this moment, the ratchet on the transmission levers or the backstay that opens the door can automatically and the double wedge on the ratchet meshes and make labeled door be in normally open.Owing on the ratchet more double wedge is arranged, different open angles, different with the double wedge meeting that ratchet is meshed, therefore, can in the certain angle scope, (be generally angle in 180 degree) when opening the door and arbitrarily determine open angle, and ratchet rotational angle along clockwise direction is big more, and the open angle of labeled door is also big more.
When making the manual releasing fork rotary oscillation be to certain angle left when meeting that fire or other need and to the electromagnet energising or with external force, owing to be subjected to the driving of manual releasing fork, transmission levers or drive link can upwards be swung, make on the transmission levers or the backstay that opens the door on ratchet break away from double wedge on the ratchet, at this moment, the spring that is in compressive state discharges elastic potential energy, make chain pulling pull-button impel ratchet to be rotated counterclockwise, and turning cylinder is also closed the door rocking arm and orders about labeled door and close automatically thereupon being rotated counterclockwise synchronously to drive, and then effectively isolate flame or flue gas, perhaps satisfy other needs.
After adopting such scheme, often driving labeled door electromagnetism release does not need to finish the unlatching of labeled door or close by complicated drive mechanisms such as clutches, adopt the labeled door electromagnetism release of this structure not only in use can automatically reset, needn't hand-reset could open the location to labeled door, and simple in structure, can reduce the cost of production and the maintenance cost of release greatly.Simultaneously, because the utility model also is provided with the manual releasing fork,, also can close labeled door manually when under the situation that causes cutting off the power supply owing to fire or under the situation of other needs, and then effectively isolate flame and flue gas, fully ensure related personnel and property safety.
Description of drawings
Fig. 1 is the three-dimensional structure diagram of the utility model embodiment one.
Fig. 2 is the three-dimensional structure diagram of the utility model embodiment two.
Fig. 3 is the sectional drawing of the spring force device in the utility model.
Specific embodiment
Embodiment one
The concrete structure that present embodiment is disclosed often drives labeled door electromagnetism release as shown in figures 1 and 3, it comprises that the body 100, the end that are horizontally placed on doorframe inwall upside are fixedly arranged on intrinsic spring force device 200, are fixed on intrinsic electromagnet 300, vertically are assemblied in the ratchet mechanism 400 in body 100 ends and are located at this external Rocker arm 5 00 of closing the door, wherein, ratchet mechanism 400 is for being installed with the mechanism of ratchet 420 and pull-button 430 on the turning cylinder 410; Spring force device 200 is connected with pull-button 430 on the ratchet mechanism 400 by traction bodies such as chain 210; The Rocker arm 5 00 of closing the door is positioned at outside the body 100, and an end is fixing by the turning cylinder 410 of ratchet mechanism 400, and the other end is articulated on the fixed bearing, and the Rocker arm 5 00 of closing the door can rotate synchronously with turning cylinder 410.
Described labeled door electromagnetism release also comprises manual releasing fork 600 and transmission levers 700; Manual releasing fork 600 lower ends are with 310 sockets of electromagnet pull bar or be connected, and the middle part is provided with boss 610, and the top movable end stretches out outside the body 100; The end that described transmission levers 700 is provided with screw 722 by bindiny mechanisms such as screw be fixed on ratchet 420 tops and partially after body sidewall 110 on, be positioned at ratchet 420 above part be provided with can with the ratchet 721 of double wedge 421 engagement on the ratchet 420, and can guarantee when transmission levers 700 stressed when upwards lifting or swinging, ratchet 721 on the lever can effectively break away from the double wedge 421 on the ratchet 420, drive link movable end 710 is overlapped on the boss 610 of manual releasing fork 600, and transmission levers 700 can around fixed axis with the plane of parallel sidewalls in do the swing of certain angle.
The described labeled door electromagnetism release of often opening also comprises microswitch 800, and microswitch 800 is installed under the transmission levers 700.When labeled door is often opened and when closing, microswitch 800 can contact with transmission levers 700 and break away from respectively, and perhaps when labeled door was often opened and closed, microswitch 800 was in disengaging and contact condition with transmission levers 700 respectively.
The described labeled door electromagnetism release of often opening, its spring force device 200 is made up of spring housing 250, spring 220 and chain 210, wherein, chain external part at spring housing 250 is provided with back-up ring 240, spring 220 is fixedly mounted in the spring housing 250 to avoid spring 220 when the compression and skid off spring housing 250, and chain 210 axially runs through spring 220, and be positioned on the chain 210 of spring housing 250 bottoms one end and be installed with block 230, the diameter of this block 230 is greater than the end face diameter of spring 220, and block 230 is pressed against on the end face of movable end of spring 220.
The described labeled door electromagnetism release of often opening is provided with reset tension spring 900 between its transmission levers movable end 710 and the ratchet 721, and the upper end of reset tension spring 900 is connected with transmission levers 700, and the lower end is fixed on body sidewall 110 or body bottom.
The described labeled door electromagnetism release of often opening, ratchet 420 on its ratchet mechanism 400, manual releasing fork 600, transmission levers 700 all are positioned at a side relative with the body sidewall 110 of fixing spring power apparatus 200, and this can make corresponding mechanism rotation or swing in a plane with parallel sidewalls to greatest extent.
The described labeled door electromagnetism release of often opening, its manual releasing fork 600 middle parts are fixed on the body sidewall 120, and this manual releasing fork 600 can be done the rotation of certain angle around fixed axis in the plane that is parallel to the body sidewall, and the boss on the fork 610 is located on the manual releasing fork 600 axle sleeve sidewalls.
Embodiment two
The concrete structure that present embodiment is disclosed often drives labeled door electromagnetism release as shown in Figures 2 and 3, the labeled door electromagnetism release place different with the release structure described in the embodiment one of often opening in the present embodiment is mainly manual releasing fork 600 replacements of manual releasing fork 600 by another structure, transmission levers 700 is replaced by the combined mechanism of the drive link 730 and the backstay 740 that opens the door, other structures are identical with the release described in the embodiment one, only describe with regard to the structure different among labeled door electromagnetism release and the embodiment one of often opening in the present embodiment at this, particular content is as follows:
A kind of labeled door electromagnetism release of often opening described in the present embodiment forms hook formation 731 upwards endways after described drive link 730 movable ends are bent downwardly, the other end is fixed on the manual releasing fork 600; The backstay 740 that opens the door is arcuation, and the movable end of the backstay 740 that opens the door is overlapped on the upper surface of the hook formation 731 of drive link 730, the other end is fixed on the body sidewall 120 of ratchet 420 tops after partially by screw 742 by connecting elementss such as screw are rotatable, be positioned at ratchet 420 above part be provided with can with the ratchet 741 of double wedge 421 engagement on the ratchet 420, and can guarantee when drive link 730 stressed when upwards lifting or swinging, the ratchet 741 on the backstay 740 of opening the door can effectively break away from the double wedge 421 on the ratchet, and then ratchet 420 is rotated counterclockwise and makes and often open labeled door and close.
Often drive labeled door electromagnetism release described in the present embodiment, its drive link 730 preferably is socketed in the medium position of manual releasing fork 600, and with two bar coincidences place is that socket place is fixed on the sidewall 120, and manual releasing fork 600 and drive link 730 can be done the rotation or the swing of certain angle scope synchronously around fixed axis.
The concrete course of work of often driving labeled door electromagnetism release described in the foregoing description one and the embodiment two is as follows:
When opening the door, ratchet 420 turns clockwise, pull-button 430 on the ratchet mechanism 400 just spurs chain 210 forward thereupon rotation, and then make the stressed and extruding compression spring 220 of block 230, therefore elasticity of saving potential energy of spring 220 then, at this moment, the ratchet on the transmission levers 700 or the backstay 740 that opens the door can automatically and the double wedge on the ratchet 420 421 meshes and make labeled door be in normally open.Owing on the ratchet 420 more double wedge 421 is arranged, then different open angles, different with double wedge 421 meetings that ratchet is meshed, therefore, can in the certain angle scope, (be generally angle in 180 degree) when opening the door and arbitrarily determine open angle, and ratchet 420 rotational angle along clockwise direction is big more, and the open angle of often opening labeled door is also big more.
When making manual releasing fork 600 rotary oscillation be to certain angle left when meeting that fire or other need and to electromagnet 300 energisings or with external force, owing to be subjected to the driving of manual releasing fork 600, the upwards swing of transmission levers 700 or drive link 730, make transmission levers 700 or the backstay 740 that opens the door on ratchet break away from double wedge 421 on the ratchet 420, at this moment, the spring 220 that is in compressive state discharges elastic potential energy, make chain 210 pulling pull-buttons 430 impel ratchet 420 to be rotated counterclockwise, and turning cylinder 410 is also closed the door Rocker arm 5 00 and orders about labeled door and close automatically thereupon being rotated counterclockwise synchronously to drive, and then effectively isolate flame or flue gas, perhaps satisfy other needs.
The above, only for preferred embodiment of the present invention, so can not limit scope of the invention process with this, i.e. the equivalence of doing according to claim of the present invention and description changes and modification, all should still belong in the scope that the present invention contains.
Claims (10)
1. often drive labeled door electromagnetism release for one kind, comprise that the body, the end that are horizontally placed on doorframe inwall upside are fixedly arranged on intrinsic spring force device, are fixed on electromagnet on body bottom or the sidewall, vertically are assemblied in the ratchet mechanism of body end and are located at this external door fixed bearing and rocking arm of closing the door, wherein, ratchet mechanism is the mechanism that is installed with ratchet and pull-button on the turning cylinder; The spring force device is connected with pull-button elasticity on the ratchet mechanism; The rocking arm of closing the door is positioned at originally external, and an end is fixed by the turning cylinder of ratchet mechanism, the other end is articulated on the fixed bearing, and close the door rocking arm and turning cylinder can rotate synchronously, it is characterized in that: also comprise manual releasing fork and transmission levers, wherein the manual releasing fork is fixed in the body, lower end and the socket of electromagnet pull bar, it is external that the top movable end stretches out in, and transmission levers one end rotatably is fixed on the body sidewall, and the other end overlaps mutually with the manual releasing fork.
2. the labeled door electromagnetism release of often opening according to claim 1 is characterized in that: described manual releasing fork middle part is provided with boss; Described transmission levers one end be fixed on ratchet top and partially after the body sidewall on, be positioned at ratchet above part be provided with can with the ratchet of double wedge on ratchet engagement, the transmission levers movable end is overlapped on the boss of manual releasing fork, and transmission levers can around fixed axis with the plane of parallel sidewalls in do the swing of certain angle.
3. a kind of labeled door electromagnetism release of often opening according to claim 1, it is characterized in that: described manual releasing fork middle part is fixed on the body sidewall, and this fork can be done the rotation of certain angle around fixed axis in being parallel to the plane of sidewall, and the boss on the fork is located on the manual releasing fork axle sleeve sidewall.
4. a kind of labeled door electromagnetism release of often opening according to claim 1, it is characterized in that: described boss is provided with and transmission levers shape and width corresponding grooves, this groove upper end open is big than bottom portion of groove, and the bottom portion of groove width is more than or equal to the width of transmission levers movable end.
5. a kind of labeled door electromagnetism release of often opening according to claim 1, it is characterized in that: be provided with reset tension spring between the movable end of described transmission levers and the ratchet, the upper end of reset tension spring is connected with transmission levers, and the lower end is fixed on body sidewall or body bottom.
6. often drive labeled door electromagnetism release for one kind, a kind of labeled door electromagnetism release of often opening, comprise that the body, the end that are horizontally placed on doorframe inwall upside are fixedly arranged on intrinsic spring force device, are fixed on electromagnet on body bottom or the sidewall, vertically are assemblied in the ratchet mechanism of body end and are located at this external door fixed bearing and rocking arm of closing the door, wherein, ratchet mechanism is the mechanism that is installed with ratchet and pull-button on the turning cylinder; The spring force device is connected with pull-button elasticity on the ratchet mechanism; The rocking arm of closing the door is positioned at originally external, and an end is fixed by the turning cylinder of ratchet mechanism, the other end is articulated on the fixed bearing, and close the door rocking arm and turning cylinder can rotate synchronously, it is characterized in that: also comprise manual releasing fork, drive link and the backstay that opens the door, wherein, the manual releasing fork is fixed in the body, the pull bar of its lower end and electromagnet socket-connects, and it is external that the upper end stretches out in, and middle part and drive link fix; Backstay one end that opens the door is fixed on the body sidewall, and the other end is overlapped on the drive link.
7. often drive labeled door electromagnetism release, it is characterized in that for one according to claim 6: form hook formation upwards after described drive link movable end is bent downwardly endways, the other end is fixed on the manual releasing fork; The described backstay that opens the door is arcuation obliquely, and movable end is overlapped on the upper surface of the hook formation of drive link, the other end is rotatable to be fixed on the sidewall of ratchet top body, and be positioned at ratchet above part be provided with can with the ratchet of double wedge engagement on the ratchet.
8. a kind of labeled door electromagnetism release of often opening according to claim 6, it is characterized in that: described drive link is socketed in the medium position of manual releasing fork, and two bar coincidences place are that socket place is fixed on the sidewall, and manual releasing fork and drive link can be done the rotation or the swing of certain angle scope synchronously around fixed axis.
9. according to claim 1 or 6 described a kind of labeled door electromagnetism releases of often opening, it is characterized in that: also comprise microswitch, microswitch be installed in transmission levers or drive link under.
10. according to claim 1 or 6 described a kind of labeled door electromagnetism releases of often opening, it is characterized in that: described spring force device is made up of spring housing, spring and chain, wherein, chain external part at spring housing is provided with back-up ring, spring is fixedly mounted in the spring housing, and chain shaft is to running through spring, and is positioned on the chain of spring housing bottom one end and is installed with block, the diameter of this block is greater than the end face diameter of spring, and block is pressed against the movable end of spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020697717 CN201924742U (en) | 2010-12-31 | 2010-12-31 | Electromagnetic releaser for fireproof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020697717 CN201924742U (en) | 2010-12-31 | 2010-12-31 | Electromagnetic releaser for fireproof door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201924742U true CN201924742U (en) | 2011-08-10 |
Family
ID=44428600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020697717 Expired - Fee Related CN201924742U (en) | 2010-12-31 | 2010-12-31 | Electromagnetic releaser for fireproof door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201924742U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106044161A (en) * | 2016-06-28 | 2016-10-26 | 贵阳普天物流技术有限公司 | Transmission belt fireproof method and structure |
| CN110552561A (en) * | 2019-10-11 | 2019-12-10 | 无锡市东舟船舶设备股份有限公司 | fire prevention A60 sliding door push rod connects release |
| CN111706202A (en) * | 2020-07-08 | 2020-09-25 | 湖南瀚星防爆防火电机有限公司 | Explosion-proof and fireproof electromagnetic brake device |
-
2010
- 2010-12-31 CN CN 201020697717 patent/CN201924742U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106044161A (en) * | 2016-06-28 | 2016-10-26 | 贵阳普天物流技术有限公司 | Transmission belt fireproof method and structure |
| CN106044161B (en) * | 2016-06-28 | 2018-04-20 | 贵阳普天物流技术有限公司 | A kind of conveyor method of fire protection and structure |
| CN110552561A (en) * | 2019-10-11 | 2019-12-10 | 无锡市东舟船舶设备股份有限公司 | fire prevention A60 sliding door push rod connects release |
| CN110552561B (en) * | 2019-10-11 | 2024-04-05 | 无锡市东舟船舶设备股份有限公司 | Fire-proof A60 sliding door push rod connection release device |
| CN111706202A (en) * | 2020-07-08 | 2020-09-25 | 湖南瀚星防爆防火电机有限公司 | Explosion-proof and fireproof electromagnetic brake device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20141231 |
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| EXPY | Termination of patent right or utility model |