通风系统中， 风门是一种常用的通风设施，在煤矿安全生产中起着非常重要的作用 。 In the coal mine ventilation system, the damper is a commonly used ventilation facility and plays a very important role in coal mine safety production .
No pressure damper is suitable for any place where damper is needed
The non-pressure air damper is mainly used in the mine inlet and return lanes and the main inlet and return lanes. Each contact lane is a substitute for all current dampers.Non pressure air door is mainly used for underground mine into the back alley
The non-pressure air damper is an ideal type of air damper currently used in coal mines in China. It is mainly used in each connection lane between the mine inlet air return lane and the main inlet air return lane. It breaks the long-established traditional air damper structure.
The wind pressure acting on the damper is skillfully converted into an internal force through the balance structure, which fully shows that the damper structure is reasonable.
The non-pressure air damper is easy to use, safe and reliable, and has been highly evaluated by experts and users. It is a substitute for the air damper currently used in these air lanes.Non pressure air door is simple to use, safe and reliable, highly evaluated by
Non-pressure air door is composed of door frame, door leaf, connecting rod balancing mechanism and weight.Non pressure air door is composed of a door frame,
Two dampers are opened in two directions respectively. Linkage and support arm are used to achieve linkage. Changing the length of the link can adjust the strictness of the damper.The two air doors were opened in two directions
As shown in the structural diagram, two doors A and B are connected into a whole through a support arm and a link C. When A moves forward, the other door B moves backwards under the driving of the link.
In this way, the resistance F to open the damper is only the aerodynamic force of the damper and the gravity of the weight.
Because the force of the wind pressure difference on the damper A is equal to the force on the damper B, and the two forces cancel each other through the connecting rod, it is called a pressureless damper.
Due to different production batches and specific models, the pictures are for reference only. Please contact our sales staff for specific verification.Because the production batches, the different models, the picture is for reference only Please contact our sales staff for specific verification
The pressure-free air damper adopts the principle of pressure balance. The four-bar linkage and the limit device fixed on the door frame are used to realize the synchronous opening and closing of the two air dampers. After the air damper is closed, the windshields on the two air dampers are tightly contacted. Anti-leak effect. As the negative pressure of the mine acting on the damper is converted into an internal force by the linkage mechanism and is balanced, the magnitude of the damper opening and closing force depends on the weight of the hammer (the weight of the hammer is generally between 10kg and 25kg) to ensure that the damper opens. Time-saving, convenient and flexible. As shown in Figure 2, since the area of the two dampers is approximately equal, the negative pressure of the mine acting on the two dampers is also equal, that is, F1≈F2. The adjusting link mechanism is that the two dampers are in close contact and the dampers are closed. State, the positive and negative moments acting on a single fan are equal.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.
In terms of damper opening force, non-pressure dampers are composed of two small dampers. When opening or closing one damper, regardless of the opening and closing direction, the other damper opens and closes in opposite directions. At this time, the pressure is released, which is extremely easy. Opening and closing, the force has nothing to do with the size and direction of the wind pressure; the old-style damper door leaf is heavy, and it is difficult to open under the condition of large negative pressure in the roadway, which requires 4 or 5 people to open at the same time.
Each set of non-pressure air damper is composed of two groups of air dampers. It has two-way air insulation, and no reverse air damper is needed. Due to the negative pressure of the roadway, the old-fashioned air damper must be installed with anti-air damper for use when the wind is flowing backward. The opposite two dampers are composed of two sets of four dampers.
The non-pressure air damper is sealed on both sides with a small amount of air leakage. Old-fashioned air dampers sometimes install small air dampers above the air damper to reduce the opening pressure, which increases the air leakage of the air damper.
The non-pressure damper system is simple, sturdy and durable, and will not damage the damper during the opening process. Due to the difficulty of opening the old damper, people often use heavy objects to pry, and the damper is easy to damage the damper.
The pressure balance principle used by the non-pressure damper closes smoothly and is safe and reliable. The non-pressure damper has two doors in each group. The opening area is larger than that of the old-style damper single door, which is easy for pedestrians, traffic, and collisions. Moreover, the old-fashioned damper is difficult to open due to the large pressure of the damper, which may cause injuries to pedestrians, and the safety performance is worse than that of the non-pressure damper.
The entire material of the non-pressure air damper is made of iron products. It has good fire resistance, can effectively block the fire that may occur in the belt transport lane, prevent fire and harmful gases from entering other lanes, and has good anti-corrosion and moisture-proof performance. It is also strong and difficult to deform. The door leg of the old-style damper is made of square wood, which has poor anti-corrosion and moisture-proof performance. It is fragile for a long time and needs to be replaced.
Under the action of the heavy hammer, the non-pressure air door can achieve mutual lock between the two air doors, which is not easy to cause the problem of air current short circuit.
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