CN109914958B - Failure-preventing pneumatic window opener - Google Patents
Failure-preventing pneumatic window opener Download PDFInfo
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- CN109914958B CN109914958B CN201910296435.8A CN201910296435A CN109914958B CN 109914958 B CN109914958 B CN 109914958B CN 201910296435 A CN201910296435 A CN 201910296435A CN 109914958 B CN109914958 B CN 109914958B
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Abstract
The invention discloses an anti-failure pneumatic window opener which comprises a cylinder body, wherein the top of the cylinder body is provided with an upper end cover, and the bottom of the cylinder body is provided with a lower end cover; the gas spring is provided with a sleeve, a piston capable of axially reciprocating in the gas chamber is mounted at the bottom of the sleeve, a support rod is mounted in the sleeve, the support rod pushes the sleeve out of the cylinder body when the gas spring is opened, the support rod is integrally accommodated in the sleeve when the gas spring is completely closed, and a pressure relief device is arranged on one side of the upper end of the cylinder body; an inflation gas circuit is arranged between the gas chamber and the outer wall of the cylinder body; and one end of the limiting block is connected with the bottom of the upper end cover, and the other end of the limiting block extends towards the inside of the air chamber. When the window opener works normally, namely an air source is ventilated, the window opener is in a completely closed state; when the air source is cut off, the window opener can be automatically opened, the problem that the air source is cut off and the window opener cannot be opened when a fire disaster happens can be solved, and good economic benefits can be generated.
Description
Technical Field
The invention relates to the technical field of window openers, in particular to an anti-failure pneumatic window opener.
Background
With the development of economy and the continuous promotion of national urbanization construction, office buildings, villa districts, large stadiums and public activity places are more and more, windows with larger sizes are often installed in the buildings to obtain better lighting effects, and the windows or the installation positions are too high or the weight is too heavy, so that certain difficulty is caused when people open or close the windows. In order to solve the problem, technicians develop window openers using electric power or pneumatic power as a power source in succession, wherein the pneumatic window opener is very low in power consumption, energy-saving and environment-friendly due to the fact that compressed air is used as power, and is favored by more and more consumers.
However, the pneumatic window opener in the current market also has some problems, for example, the existing pneumatic window opener generally adopts a two-way cylinder principle, namely, when the cylinder body is ventilated, the window opener can be automatically opened, and when the cylinder body is not ventilated, the window opener can be automatically closed. Such theory of operation has a great potential safety hazard, and once meetting the condition of taking place the conflagration, power or air supply are cut off, and the window just can't be opened in time and ventilate, and the smog that the burning produced often can make indoor personnel suffocate the death.
Disclosure of Invention
In order to solve the problems mentioned in the technical background, the inventor develops an anti-failure pneumatic window opener by combining the years of experience of the inventor in the industry of building doors and windows, wherein the window opener is closed when an air source is ventilated, can be automatically opened when the air source is cut off, and is additionally provided with a temperature sensing glass bubble on a pressure relief air path. When a fire disaster occurs, if the air source is not closed in time, the temperature sensing glass bulb can also automatically break to carry out forced pressure relief when the fire disaster burns to reach a certain temperature.
In order to achieve the purpose, the invention provides the following technical scheme: an anti-failure pneumatic window opener comprises a cylinder body, wherein an upper end cover is arranged at the top of the cylinder body, a lower end cover is arranged at the bottom of the cylinder body, the lower end cover is fixed at the bottom of the cylinder body through a first clamp spring, a hollow-structure air chamber is arranged in the cylinder body, and the air chamber is cylindrical; the air spring is provided with a sleeve, a piston capable of axially reciprocating in the air chamber is mounted at the bottom of the sleeve, the piston is fixed at the bottom of the air spring through a second snap spring, a support rod is mounted in the sleeve, one end of the support rod is connected with the lower end cover, the other end of the support rod is located in the sleeve, when the air spring is opened, the support rod pushes the sleeve out of the cylinder body, when the air spring is completely closed, the support rod is integrally accommodated in the sleeve, the outer wall of the air spring is tightly attached to the inner wall of the air chamber, and a sleeve joint is mounted at the top of; the pressure relief device is positioned on one side of the upper end of the cylinder body and is tightly attached to the outer wall of the cylinder body, the pressure relief device is provided with a temperature sensing glass bulb and a pressure relief air path, the temperature sensing glass bulb is arranged on the pressure relief air path, and the pressure relief air path is provided with a pressure relief opening; the air charging path is arranged between the air chamber and the outer wall of the cylinder body and is divided into two paths, one path penetrates through the upper end cover and is communicated with the air chamber, the other path extends to the outside of the cylinder body and is communicated with the pressure relief air path, and an air charging port is arranged at the bottom of the air charging path; one end of the limiting block is connected with the bottom of the upper end cover, the other end of the limiting block extends towards the interior of the air chamber, the central line of the air spring is used as a standard, and the other side of the limiting block is also provided with the limiting block; when the gas spring is in a complete opening and closing state, the limiting block prevents the piston from being attached to the bottom of the upper end cover, and the gas chamber is prevented from disappearing; a first sealing ring is arranged between the upper end cover and the gas spring; a second sealing ring is arranged between the piston and the inner wall of the air chamber; the shaft sleeve is arranged between the upper end cover and the gas spring and is located below the first sealing ring.
Furthermore, the material of axle sleeve is copper, because the performance of copper is softer, can effectually slow down the friction between air spring and the cylinder body.
Furthermore, third sealing rings are arranged on two sides of the temperature sensing glass bulb. The third sealing ring can play a good sealing role, and can effectively prevent gas in the cylinder body from leaking when the temperature sensing glass bubble is not cracked.
Further, the inflation pressure of the inflation gas circuit is 0.2 MPa-0.3 MPa, and the gas source medium of the inflation gas circuit is compressed air.
Further, the set burst temperature of the temperature sensitive glass bulb includes any one of 57 ℃, 68 ℃, 79 ℃, 93 ℃, 141 ℃ and 182 ℃.
Further, the set burst temperature of the temperature sensitive glass bulb includes one or more of 57 ℃, 68 ℃, 79 ℃, 93 ℃, 141 ℃ and 182 ℃, and the outer surface of the temperature sensitive glass bulb on the market is generally painted with a color so that people can know the set burst temperature of the temperature sensitive glass bulb through the color, wherein the temperature represented by the color is 57 ℃ orange, 68 ℃ red, 79 ℃ yellow, 93 ℃ green, 141 ℃ blue and 182 ℃ purple. The temperature-sensing glass bubble is embedded in the pressure relief gas circuit, so that the temperature-sensing glass bubble only has specific requirements on the set burst temperature, and the appearance color of the temperature-sensing glass bubble is not limited. The working principle of the temperature sensing glass bulb sold in the market is generally that a chemical reagent is used as temperature sensing liquid and is filled into a sealed cylindrical glass bulb to prepare the temperature sensing glass bulb. When the room temperature rises to a certain temperature due to fire, the liquid in the bubbles expands and vaporizes, and when the air pressure rises to a certain degree, the glass bubbles burst.
The working principle of the invention is as follows: when the air source is connected, the pressure generated by the compressed air acts on the piston through the air charging path, the sleeve of the air spring is compressed into the air chamber until the support rod of the air spring is completely accommodated, and at the moment, the window opener is in a completely closed state; when the air source is cut off, the external force acting on the piston disappears, and the supporting rod accommodated in the sleeve can gradually push the sleeve out of the cylinder body until the window opener is in a fully opened state; even when the air supply normally switches on, after the temperature sensing glass bubble reaches the burst temperature of settlement, the gas in the cylinder body air chamber can be let out along the pressure release gas circuit, and the pressure that acts on the piston diminishes, and the bracing piece of accomodating in the sleeve still can be with the sleeve progressively ejecting cylinder body, is in the open mode completely until the ware of windowing.
Compared with the prior art, the invention has the beneficial effects that:
1. when the window opener works normally, namely an air source is ventilated, the window opener is in a completely closed state; when the air source is cut off, the window opener can be automatically opened, so that the problem that the air source is cut off and the window opener cannot be opened in the case of fire can be solved.
2. When the window opener needs to be closed, pressure provided by an air source can be gathered in the gap area, and the window opener can be closed quickly.
3. The invention has simple working principle and convenient structure disassembly and assembly, and can generate better economic benefit.
Drawings
Fig. 1 is a schematic view of the window opener in a fully open and closed state.
Fig. 2 is a schematic view of the window opener in a fully closed state.
Fig. 3 is a partially enlarged view of a in fig. 1.
Fig. 4 is a schematic structural view of the temperature sensitive glass bulb.
Reference numerals: 1. the gas spring comprises a gas spring body, 2, a sleeve, 3, a sleeve joint, 4, a support rod, 5, a lower end cover, 6, a first clamp spring, 7, a cylinder body, 8, an air chamber, 9, a limiting block, 10, an upper end cover, 11, a first sealing ring, 12, a pressure relief device, 13, a pressure relief air path, 14, a temperature sensing glass bulb, 15, a pressure relief opening, 16, an inflation air path, 17, a second clamp spring, 18, a shaft sleeve, 19, a piston, 20, a second sealing ring, 21 and a third sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1 to 4, the failure-prevention pneumatic window opener comprises a cylinder body 7, wherein an upper end cover 10 is arranged at the top of the cylinder body 7, a lower end cover 5 is arranged at the bottom of the cylinder body 7, the lower end cover 5 is fixed at the bottom of the cylinder body 7 through a first clamp spring 6, a hollow-structure air chamber 8 is arranged inside the cylinder body 7, and the air chamber 8 is cylindrical; the gas spring 1 is provided with a sleeve 2, the bottom of the sleeve 2 is provided with a piston 19 capable of axially reciprocating in a gas chamber 8, the piston 19 is fixed at the bottom of the gas spring 1 through a second snap spring 17, a support rod 4 is installed in the sleeve 2, one end of the support rod 4 is connected with a lower end cover 5, the other end of the support rod 4 is positioned in the sleeve 2, when the gas spring 1 is opened, the support rod 4 ejects the sleeve 2 out of a cylinder body 1, when the gas spring 1 is completely closed, the support rod 4 is integrally accommodated in the sleeve 2, the outer wall of the gas spring 1 is tightly attached to the inner wall of the gas chamber 8, and the top of the gas spring 1 is provided with a sleeve joint; the pressure relief device 12 is positioned on one side of the upper end of the cylinder body 1 and is tightly attached to the outer wall of the cylinder body 1, the temperature sensing glass bulb 14 and the pressure relief air path 13 are installed on the pressure relief device 12, the temperature sensing glass bulb 14 is positioned on the pressure relief air path 13, and the pressure relief air path 13 is provided with a pressure relief opening 15; an inflation gas path 16 is arranged between the gas chamber 8 and the outer wall of the cylinder body 1, the inflation gas path 16 is divided into two paths, one path penetrates through the upper end cover 10 and is communicated with the gas chamber 8, the other path extends to the outside of the cylinder body 1 and is communicated with a pressure relief gas path 13, and the bottom of the inflation gas path 16 is provided with a gas charging opening; a limiting block 9, wherein one end of the limiting block 9 is welded with the bottom of the upper end cover 10, the other end of the limiting block 9 extends into the air chamber 8, the central line of the air spring 1 is taken as a standard, the limiting block 9 is arranged on the other side of the air spring, and when the air spring 1 is in a completely open-close state, the limiting block 1 prevents the piston 19 from being attached to the bottom of the upper end cover 10, so that the air chamber is prevented; a first sealing ring 11 is arranged between the upper end cover 10 and the gas spring 1; a second sealing ring 20 is arranged between the piston 19 and the inner wall of the air chamber 8; a shaft sleeve 18 is arranged between the upper end cover 10 and the gas spring 1, and the shaft sleeve 18 is positioned below the first sealing ring 11.
In this embodiment, the shaft sleeve 18 is made of copper, and the copper has a relatively soft performance, so that friction between the gas spring and the cylinder body can be effectively reduced.
In this embodiment, the temperature-sensitive glass bulb 14 is embedded at one end of the pressure-releasing air passage 13 close to the pressure-releasing opening, so that after the temperature-sensitive glass bulb 14 is cracked, glass slag generated by the cracking of the temperature-sensitive glass bulb 4 can be smoothly discharged from the pressure-releasing opening 15, and the pressure-releasing air passage 13 cannot be blocked.
In this embodiment, the third sealing rings 21 are disposed on both sides of the temperature sensing glass bulb 14, and the third sealing rings 21 can perform a good sealing function, so that when the temperature sensing glass bulb 14 is not burst, the gas in the cylinder 7 can be effectively prevented from leaking.
In this embodiment, the inflation pressure of the inflation gas circuit 16 is 0.2 MPa-0.3 MPa, and the gas source medium of the inflation gas circuit 16 is compressed air.
In the present embodiment, the set burst temperature of the temperature sensitive glass bulb 14 includes any one of 57 ℃, 68 ℃, 79 ℃, 93 ℃, 141 ℃ and 182 ℃. The user can select the proper temperature sensing glass bulb 14 according to the actual requirement.
Example 2
A certain office building in Zhengzhou is selected as an experimental object, and the area is 150 squares. Experiment time: 4, 9 months and 2018, the indoor temperature is 18 ℃, and the outdoor temperature is 21 ℃.
Because the position close to the window is good in lighting, office desks, chairs or file cabinets and the like are generally arranged near the window. Therefore, wooden tables and chairs, waste paper, rags and the like are selected to simulate office places.
The air source pressure of the window opener is adjusted to be 0.2MPa, the burst temperature of the temperature sensing glass bubbles 14 in the pressure relief device 12 is set to be 68 ℃, inflammable matters such as wooden tables and chairs, waste paper and rags are ignited, the window opener stands 5 meters away from an ignition point, and the temperature of a window opener cylinder body 7 is measured in real time by a temperature measuring gun. And (3) starting a fire source, manually closing an air source of the window opener, timing, automatically opening the window opener at the moment, and sharing for 3 seconds when the window opener is in a completely opened state. And (3) in 30 seconds after ignition, when the broken glass slag falls out of the pressure relief opening 15, judging that the temperature sensing glass bubble 14 is burst, and at the moment, the temperature of the window opener cylinder body is 89 ℃.
The operation principle and procedure of the window opener in this example are the same as those in embodiment 1.
Example 3
A certain office building in Zhengzhou is selected as an experimental object, and the area is 150 squares. Experiment time: 4 months and 10 days in 2018, the indoor temperature is 19 ℃, and the outdoor temperature is 21 ℃.
Because the position close to the window is good in lighting, office desks, chairs or file cabinets and the like are generally arranged near the window. Therefore, wooden tables and chairs, waste paper, rags and the like are selected to simulate office places.
The air source pressure of the window opener is adjusted to be 0.25MPa, the burst temperature of the temperature sensing glass bubbles 14 in the pressure relief device 12 is set to be 68 ℃, inflammable matters such as wooden tables and chairs, waste paper and rags are ignited, the window opener stands 5 meters away from an ignition point, and the temperature of a window opener cylinder body 7 is measured in real time by a temperature measuring gun. And (3) starting a fire source, manually closing an air source of the window opener, timing, automatically opening the window opener at the moment, and sharing for 3 seconds when the window opener is in a completely opened state. And in 32 seconds after ignition, when the broken glass slag falls out of the pressure relief opening 15, the temperature of the window opener cylinder 7 can be 87 ℃, and the temperature of the temperature sensing glass bulb 14 can be judged to be burst.
The operation principle and procedure of the window opener in this example are the same as those in embodiment 1.
Example 4
A certain office building in Zhengzhou is selected as an experimental object, and the area is 150 squares. Experiment time: 4, 15 and 2018, the indoor temperature is 22 ℃, and the outdoor temperature is 25 ℃. The position close to the window is good in lighting, and office desks, chairs or file cabinets and the like are generally arranged near the window. Therefore, wooden tables and chairs, waste paper, rags and the like are selected to simulate office places.
The air source pressure of the window opener is adjusted to be 0.25MPa, the burst temperature of the temperature sensing glass bubbles 14 in the pressure relief device 12 is set to be 68 ℃, inflammable matters such as wooden tables and chairs, waste paper and rags are ignited, the window opener stands 5 meters away from an ignition point, and the temperature of a window opener cylinder body 7 is measured in real time by a temperature measuring gun. And (3) igniting the fire source, not closing an air source of the window opener, finding that broken glass residues fall out of the pressure relief opening 25 in 35 seconds after ignition, judging that the temperature sensing glass bulb 14 is cracked, and controlling the temperature of the window opener cylinder body 7 to be 83 ℃. Meanwhile, the window opener starts to be automatically opened, is in a fully opened state in 43 seconds after ignition, and is 8 seconds in total in the whole opening process.
The operation principle and procedure of the window opener in this example are the same as those in embodiment 1.
Example 5
A single apartment building in Zhengzhou is selected as an experimental object, and the area is 55 square. Experiment time: 9 months and 1 day in 2018, the indoor temperature is 30 ℃, and the outdoor temperature is 32 ℃.
Because the position close to the window has better lighting, a bed, furniture and the like are generally arranged near the window. Therefore, the simulation apartment places such as waste mattresses, wooden furniture and the like are selected.
Since many combustible materials are present in living places such as apartments and the like, and the fire rapidly spreads when a fire breaks out, the burst temperature of the temperature sensitive glass bulb 14 is set to 57 ℃. The air source pressure of the window opener is adjusted to be 0.3MPa, inflammable matters such as waste mattresses and wooden furniture are ignited, the window opener stands 5 meters away from the ignition point, and the temperature of a window opener cylinder body 7 is measured in real time by a temperature measuring gun. And (3) igniting the fire source, not closing an air source of the window opener, finding that broken glass residues fall out from the pressure relief opening 25 in 29 seconds after ignition, judging that the temperature sensing glass bulb 14 is cracked, and controlling the temperature of the window opener cylinder body 7 to be 67 ℃. Meanwhile, the window opener starts to be automatically opened, is in a fully opened state in the 35 th second after ignition, and is 6 seconds in total in the whole opening process.
The operation principle and procedure of the window opener in this example are the same as those in embodiment 1.
Example 6
A single apartment building in Zhengzhou is selected as an experimental object, and the area is 55 square. Experiment time: 9 and 10 days in 2018, the indoor temperature is 32 ℃, and the outdoor temperature is 33 ℃.
Because the position close to the window has better lighting, a bed, furniture and the like are generally arranged near the window. Therefore, the simulation apartment places such as waste mattresses, wooden furniture and the like are selected.
Since many combustible materials are present in living places such as apartments and the like, and the fire rapidly spreads when a fire breaks out, the burst temperature of the temperature sensitive glass bulb 14 is set to 57 ℃. The air source pressure of the window opener is adjusted to be 0.3MPa, inflammable matters such as waste mattresses and wooden furniture are ignited, the window opener stands 5 meters away from the ignition point, and the temperature of a window opener cylinder body 7 is measured in real time by a temperature measuring gun. And (3) starting a fire source, manually closing an air source of the window opener, timing, automatically opening the window opener at the moment, and sharing for 4 seconds when the window opener is in a completely opened state. In the 25 th second after ignition, the broken glass slag is found to fall out from the pressure relief opening 15, and the temperature sensing glass bulb 14 can be judged to be burst, and at the moment, the temperature of the window opener cylinder body 7 is 65 ℃.
The operation principle and procedure of the window opener in this example are the same as those in embodiment 1.
Example 7
In order to further explore the effect of preventing the window opener from losing effect, the air source pressure is adjusted to 0.15MPa in the embodiment, and the opening effect of the window opener in the abnormal working state is simulated.
A certain office building in Zhengzhou is selected as an experimental object, and the area is 150 squares. Experiment time: 20 days in 2019, 1 month and 7 ℃ indoor temperature and 2 ℃ outdoor temperature. The position close to the window is good in lighting, and office desks, chairs or file cabinets and the like are generally arranged near the window. Therefore, wooden tables and chairs, waste paper, rags and the like are selected to simulate office places.
The air source pressure of the window opener is adjusted to be 0.15MPa, the burst temperature of the temperature sensing glass bulb 14 in the pressure relief device is set to be 68 ℃, inflammable matters such as wooden tables and chairs, waste paper and rags are ignited, the window opener stands 5 meters away from an ignition point, and the temperature of the window opener cylinder body 7 is measured in real time by a temperature measuring gun. And (3) igniting the fire source, not closing an air source of the window opener, finding that broken glass residues fall out from the pressure relief opening 15 39 seconds after ignition, judging that the temperature sensing glass bubble 14 is cracked, and controlling the temperature of the window opener cylinder body 7 to be 79 ℃. Meanwhile, the window opener starts to be automatically opened, is in a fully opened state in 45 th second after ignition, and is 6 seconds in total in the whole opening process.
The operation principle and procedure of the window opener in this example are the same as those in embodiment 1.
It can be seen from the above embodiments that the influence of the external room temperature on the set burst temperature of the temperature-sensitive glass bulb is small, and the temperature-sensitive glass bulb can adapt to most working environments.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a prevent pneumatic ware of windowing of failure which characterized in that: comprises that
The cylinder body is provided with an upper end cover at the top and a lower end cover at the bottom, the lower end cover is fixed at the bottom of the cylinder body through a first snap spring, and a hollow air chamber is arranged in the cylinder body and is cylindrical;
the air spring is provided with a sleeve, a piston capable of axially reciprocating in the air chamber is mounted at the bottom of the sleeve, the piston is fixed at the bottom of the air spring through a second snap spring, a support rod is mounted in the sleeve, one end of the support rod is connected with the lower end cover, the other end of the support rod is located in the sleeve, when the air spring is opened, the support rod pushes the sleeve out of the cylinder body, when the air spring is completely closed, the support rod is integrally accommodated in the sleeve, the outer wall of the air spring is tightly attached to the inner wall of the air chamber, and a sleeve joint is mounted at the top of;
the pressure relief device is positioned on one side of the upper end of the cylinder body and is tightly attached to the outer wall of the cylinder body, the pressure relief device is provided with a temperature sensing glass bubble and a pressure relief air path, the temperature sensing glass bubble is positioned on the pressure relief air path, and the pressure relief air path is provided with a pressure relief opening;
the air charging path is arranged between the air chamber and the outer wall of the cylinder body and is divided into two paths, one path penetrates through the upper end cover and is communicated with the air chamber, the other path extends to the outside of the cylinder body and is communicated with the pressure relief air path, and an air charging port is arranged at the bottom of the air charging path;
one end of the limiting block is connected with the bottom of the upper end cover, the other end of the limiting block extends towards the interior of the air chamber, the central line of the air spring is used as a standard, and the other side of the limiting block is also provided with the limiting block; when the gas spring is in a complete opening and closing state, the limiting block prevents the piston from being attached to the bottom of the upper end cover, and the gas chamber is prevented from disappearing;
a first sealing ring is arranged between the upper end cover and the gas spring;
a second sealing ring is arranged between the piston and the inner wall of the air chamber;
the shaft sleeve is arranged between the upper end cover and the gas spring and is located below the first sealing ring.
2. The failure-prevention pneumatic window opener of claim 1, characterized in that:
and third sealing rings are arranged on two sides of the temperature sensing glass bulb.
3. The failure-prevention pneumatic window opener of claim 1, characterized in that:
the inflation pressure of the inflation gas circuit is 0.2 MPa-0.3 MPa, and the gas source medium of the inflation gas circuit is compressed air.
4. The failure-prevention pneumatic window opener of claim 1, characterized in that:
the set burst temperature of the temperature sensitive glass bubbles includes any one of 57 ℃, 68 ℃, 79 ℃, 93 ℃, 141 ℃ and 182 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910296435.8A CN109914958B (en) | 2019-04-13 | 2019-04-13 | Failure-preventing pneumatic window opener |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910296435.8A CN109914958B (en) | 2019-04-13 | 2019-04-13 | Failure-preventing pneumatic window opener |
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| CN109914958B true CN109914958B (en) | 2020-09-04 |
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| CN201910296435.8A Active CN109914958B (en) | 2019-04-13 | 2019-04-13 | Failure-preventing pneumatic window opener |
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| CN110552574B (en) * | 2019-08-29 | 2021-03-30 | 广东东箭汽车科技股份有限公司 | Vapour-pressure type vaulting pole and car |
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| US6425211B1 (en) * | 2000-11-20 | 2002-07-30 | Maxam Metal Products Ltd. | Self-closing fire rated floor door |
| CN103851117A (en) * | 2012-11-30 | 2014-06-11 | 日立汽车系统株式会社 | Gas spring |
| CN104213792A (en) * | 2014-08-27 | 2014-12-17 | 宁波合力伟业消防科技有限公司 | Pneumatic window with multiple opening functions |
| CN104806114A (en) * | 2015-02-06 | 2015-07-29 | 华东建筑设计研究院有限公司现代都市建筑设计院 | Manual control and automatic control dual-purpose pneumatic window opening device |
| CN204728884U (en) * | 2015-06-09 | 2015-10-28 | 上海迈联建筑技术有限公司 | A kind of pneumatic type window opener |
| CN207454847U (en) * | 2017-11-24 | 2018-06-05 | 丹阳市飞轮气体阀门有限公司 | A kind of safe pressure relief device for gas cylinder |
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2019
- 2019-04-13 CN CN201910296435.8A patent/CN109914958B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6425211B1 (en) * | 2000-11-20 | 2002-07-30 | Maxam Metal Products Ltd. | Self-closing fire rated floor door |
| CN103851117A (en) * | 2012-11-30 | 2014-06-11 | 日立汽车系统株式会社 | Gas spring |
| CN104213792A (en) * | 2014-08-27 | 2014-12-17 | 宁波合力伟业消防科技有限公司 | Pneumatic window with multiple opening functions |
| CN104806114A (en) * | 2015-02-06 | 2015-07-29 | 华东建筑设计研究院有限公司现代都市建筑设计院 | Manual control and automatic control dual-purpose pneumatic window opening device |
| CN204728884U (en) * | 2015-06-09 | 2015-10-28 | 上海迈联建筑技术有限公司 | A kind of pneumatic type window opener |
| CN207454847U (en) * | 2017-11-24 | 2018-06-05 | 丹阳市飞轮气体阀门有限公司 | A kind of safe pressure relief device for gas cylinder |
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| CN109914958A (en) | 2019-06-21 |
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