Anti-shock wave ventilation valve with asymmetric circulation channel
A shock wave-resistant, asymmetric technology, applied in space heating and ventilation details, airflow control components, household heating, etc., can solve the problems of inconvenient maintenance, low work efficiency, and the valve core cannot be closed, and achieve disassembly and maintenance. Convenient, simple structure, reliable closing effect
Pending Publication Date: 2018-07-13
ZHEJIANG SHANGFENG SPECIAL BLOWER IND CO LTD
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Problems solved by technology
[0003] Chinese invention patent "double-sided anti-shock wave ventilation valve" application number: 201210480899.2, there is a through hole on the valve core, the shaft passes through the through hole to connect with the valve body, and the pressure spring is set on both sides of the valve core on the shaft, and the explosion wave When acting on the spool, the spool is likely to rotate at a small angle, causing jamming, and even the phenomenon that the spool cannot be closed
[0004] Chinese invention patent "ventilation valve vane compression structure" application number: 201320324895.5, can only resist one-way high pressure, not two-way
[0005] Chinese invention patent "anti-explosion valve" application number: 201420452617.2, all torsion springs are set inside the valve body, when there is an explosion wave, the torsion spring will also be impacted by the explosion wave, and it is easy to fail. The failure mode is that it cannot be reset. At this time, it may be blown off during normal ventilation, and if the strut on which the torsion spring is installed is broken, the broken strut and torsion spring are likely to affect the normal use of the valve core
[0006] Chinese invention patent "An imitation tortoiseshell valve body and anti-knock valve" application number: 201510733938.9, the frame structure is relatively complicated, the valve core needs a lot of work to make, and it is inconvenient to maintain
[0007] Chinese invention patent "Anti-Shock Wave Valve" application number: 201510751884.9, has high requirements on the length accuracy of the balance bar. If the lengths are inconsistent, one end of the closed valve leaf fits the valve body, but the other end does not fit, which cannot effectively resist the shock wave.
[0008] Chinese invention patent "a two-way anti-knock valve" application number: 201520248583.X, the valve plate selects a spring plate, and a port corresponding to the valve body is opened on the valve plate, so that the strength of the spring plate is greatly reduced, and To resist the shock wave, the spring plate needs to have sufficient strength, so it is necessary to thicken the spring plate, and the spring plate after thickening will have insufficient elasticity. In reality, this pair of contradictions cannot be solved well.
[0009] Chinese invention patent "modular double-sided impact-resistant airtight air-tumbler valve" application number: 201611100404.3 There are two valve blades, so the workload during assembly is relatively large, and this invention is only suitable for the production of small specifications in actual production valves, because when producing large-scale valves, the strength and flatness of the valve blades are difficult to meet the requirements
[0010] Chinese invention patent "frame integrated anti-impact airtight tornado valve" application number: 201611100403.9 The valve frame is an integral type, and the ventilation channel is separated by setting ribs and bottom plates inside the valve frame. This method is not suitable for large quantities. Production, because it is necessary to determine the number of ventilation channels during design, and then consider how to distribute the ribs inside the valve frame and the bottom plate, and the work efficiency is not high
Method used
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Embodiment 1
[0039] Embodiment 1: as Figure 4Shown, the left side of front and back cover 24 is front cover, and the right side is back cover, and the first air vent 241 of its front cover is located at lower half, and the second air vent 242 is located at upper half, and its back cover is just opposite, and first The vent 241 is located in the upper half, the second vent 242 is located in the lower half, and the ends of the valve blades 22 are respectively close to the first vent 241, so as to be in an inclined state,
[0040] Working principle: ①In the normal ventilation state, the air flows in from the first vent 241 and the second vent 242 of the front cover. Since the areas of the two vents are different, the pressure of the air on the valve leaf 22 is different. At this time, a torque M1 rotating around the valve shaft 23 is generated, and at this time, the tension spring is deformed, and a pulling force not directed to the valve shaft 23 is generated on the second pull plate 252, a...
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The invention discloses an anti-shock wave ventilation valve with asymmetric circulation channel. The anti-shock wave ventilation valve comprises a framework and one or more valve cores, first pressing strips and second pressing strips are used for pressing the valve cores, and edge covers tightly on the framework; each valve cores comprises a valve frame, valve blades and a valve shaft, a frontcover and a rear cover and a spring reset mechanism, wherein the valve frame comprises two upper and lower frames which are parallel to each other and two left and right frames which are parallel to each other, the middle of the valve blades is connected to a valve shaft, and can freely rotate; the spring reset mechanism is connected with the valve shaft to enable the valve blades are in an inclined state; a first ventilation opening with a larger ventilation area and a second ventilation opening with a smaller ventilation area are formed in the front cover and the rear cover, and the tail endof the valve blades are close to the first ventilation opening. When the shock wave is approached, the ventilation amount and the air pressure difference generated by the upper and lower asymmetric vent holes are utilized to push the valve blades inclined in the normal state to rotate along the valve shaft, and enabled the two end heads of the valve blades are attached to the baffle plate tightly, so that the closed ventilation valve is realized to guarantee the protection of the ventilation equipment.
Description
technical field [0001] The invention relates to an anti-shock wave ventilation valve, in particular to an anti-shock wave ventilation valve which utilizes upper and lower asymmetric flow channels to realize shock wave closing of the valve, and belongs to the field of air conditioning and HVAC. Background technique [0002] When designing building safety, it is necessary to consider the design of the corresponding HVAC facilities. In order to avoid the positive pressure generated by the explosion shock wave, the negative pressure generated by the typhoon or tornado, etc., from causing damage to the ventilation equipment in the building and causing damage to the personnel, it is necessary to install some devices at the end of the HVAC equipment that can instantly absorb the positive pressure and negative pressure. Closed anti-shock wave valve. Once the above-mentioned positive pressure or negative pressure occurs, the anti-shock wave valve can be closed instantly to cut off t...
Claims
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Login to View More IPC IPC(8): F24F13/10
CPCF24F13/105
Inventor陈利鹏谢波黄炳臣严梅英
OwnerZHEJIANG SHANGFENG SPECIAL BLOWER IND CO LTD