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In the coal mine ventilation system, damper is a kind of
common ventilation facilities, plays a very important role
in safety production of coal mine.

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恒峰g22在线登陆???????????

Non pressure air door is mainly used for underground mine into the back alley
And main return airway in between each contact Lane
Are all door alternatives.

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恒峰g22在线登陆??????

Non pressure air door is a door of the ideal of underground coal mine in China, mainly used for underground
mine in return airway and main return airway between each connection, it has broken the traditional door
structure for a long time, cleverly to wind pressure on the air door through the balance structure is transformed
into a internal force, fully demonstrated the unique air structure

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Non pressure air door is simple to use, safe and reliable, highly evaluated by
experts and users, is currently used in the airway of an alternative.

恒峰g22在线登陆??????????????????????????

Non pressure air door is composed of a door frame,
door leaf, connecting rod balancing mechanism and a weight etc

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The two air doors were opened in two directions
To realize linkage through the connecting rod and the support arm
Change the length of the connecting rod can adjust the air tightness

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恒峰g22在线登陆 ??????????A??????????B???,???????????,????????

If the structure is shown in the picture, the two door A, B are connected into a whole through a supporting arm and a connecting rod C
When the A moves forward, another door B backward movement are driven by a connecting rod,
This opens the throttle resistance F only start aerodynamic force and gravity hammer,
Because the pressure difference at the door A force equal to the force on the door B,
And the two force through the connecting rod to offset each other, it is called a non pressure air door.

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Because the production batches, the different models, the picture is for reference only Please contact our sales staff for specific verification

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恒峰g22在线登陆????????????,???????????????????????????????,????????????????????,??????????????????????????? ???????????????,????????????????(???????10kg~25kg??)??????????????? ?????2??,???????????????,???????????????????,?F1?F2,???????????????,????????,??????????????

Non pressure air door using the pressure balance principle, the four connecting rod mechanism and fixed on the door frame limiting device to realize the two air doors anisotropic synchronous opening and closing, close the throttle after the two fan door close contact with the skin, anti leakage effect is good. Due to the negative pressure in the air through the connecting rod mechanism into a kind of internal force and get the balance, door switch force depends on the size of the weight of the heavy hammer (hammer weight is generally 10kg ~ 25kg) so as to ensure the door open labor-saving, convenient and flexible.